[PATCH v2 1/3] i386: Add missing files from FreeBSD
Jan Sommer
jan.sommer at dlr.de
Mon Mar 9 15:11:20 UTC 2020
- Files needed to make rtems-libbsd build again for i386
---
freebsd/sys/net/iflib.c | 6747 +++++++++++++++++
freebsd/sys/net/iflib_private.h | 76 +
freebsd/sys/net/mp_ring.c | 554 ++
freebsd/sys/net/mp_ring.h | 75 +
.../sys/x86/include/machine/intr_machdep.h | 180 +
freebsd/sys/x86/include/machine/legacyvar.h | 73 +
freebsd/sys/x86/x86/legacy.c | 404 +
7 files changed, 8109 insertions(+)
create mode 100644 freebsd/sys/net/iflib.c
create mode 100644 freebsd/sys/net/iflib_private.h
create mode 100644 freebsd/sys/net/mp_ring.c
create mode 100644 freebsd/sys/net/mp_ring.h
create mode 100644 freebsd/sys/x86/include/machine/intr_machdep.h
create mode 100644 freebsd/sys/x86/include/machine/legacyvar.h
create mode 100644 freebsd/sys/x86/x86/legacy.c
diff --git a/freebsd/sys/net/iflib.c b/freebsd/sys/net/iflib.c
new file mode 100644
index 00000000..89bc5e79
--- /dev/null
+++ b/freebsd/sys/net/iflib.c
@@ -0,0 +1,6747 @@
+#include <machine/rtems-bsd-kernel-space.h>
+
+/*-
+ * Copyright (c) 2014-2018, Matthew Macy <mmacy at mattmacy.io>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Neither the name of Matthew Macy nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <rtems/bsd/local/opt_inet.h>
+#include <rtems/bsd/local/opt_inet6.h>
+#include <rtems/bsd/local/opt_acpi.h>
+#include <rtems/bsd/local/opt_sched.h>
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/bus.h>
+#include <sys/eventhandler.h>
+#include <sys/jail.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/md5.h>
+#include <sys/mutex.h>
+#include <sys/module.h>
+#include <sys/kobj.h>
+#include <sys/rman.h>
+#include <sys/proc.h>
+#include <sys/sbuf.h>
+#include <sys/smp.h>
+#include <sys/socket.h>
+#include <sys/sockio.h>
+#include <sys/sysctl.h>
+#include <sys/syslog.h>
+#include <sys/taskqueue.h>
+#include <sys/limits.h>
+
+#include <net/if.h>
+#include <net/if_var.h>
+#include <net/if_types.h>
+#include <net/if_media.h>
+#include <net/bpf.h>
+#include <net/ethernet.h>
+#include <net/mp_ring.h>
+#include <net/vnet.h>
+
+#include <netinet/in.h>
+#include <netinet/in_pcb.h>
+#include <netinet/tcp_lro.h>
+#include <netinet/in_systm.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+#include <netinet/tcp.h>
+#include <netinet/ip_var.h>
+#include <netinet/netdump/netdump.h>
+#include <netinet6/ip6_var.h>
+
+#include <machine/bus.h>
+#include <machine/in_cksum.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+#include <dev/led/led.h>
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pci_private.h>
+
+#include <net/iflib.h>
+#include <net/iflib_private.h>
+
+#include <rtems/bsd/local/ifdi_if.h>
+
+#ifdef PCI_IOV
+#include <dev/pci/pci_iov.h>
+#endif
+
+#include <sys/bitstring.h>
+/*
+ * enable accounting of every mbuf as it comes in to and goes out of
+ * iflib's software descriptor references
+ */
+#define MEMORY_LOGGING 0
+/*
+ * Enable mbuf vectors for compressing long mbuf chains
+ */
+
+/*
+ * NB:
+ * - Prefetching in tx cleaning should perhaps be a tunable. The distance ahead
+ * we prefetch needs to be determined by the time spent in m_free vis a vis
+ * the cost of a prefetch. This will of course vary based on the workload:
+ * - NFLX's m_free path is dominated by vm-based M_EXT manipulation which
+ * is quite expensive, thus suggesting very little prefetch.
+ * - small packet forwarding which is just returning a single mbuf to
+ * UMA will typically be very fast vis a vis the cost of a memory
+ * access.
+ */
+
+
+/*
+ * File organization:
+ * - private structures
+ * - iflib private utility functions
+ * - ifnet functions
+ * - vlan registry and other exported functions
+ * - iflib public core functions
+ *
+ *
+ */
+MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library");
+
+struct iflib_txq;
+typedef struct iflib_txq *iflib_txq_t;
+struct iflib_rxq;
+typedef struct iflib_rxq *iflib_rxq_t;
+struct iflib_fl;
+typedef struct iflib_fl *iflib_fl_t;
+
+struct iflib_ctx;
+
+static void iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid);
+static void iflib_timer(void *arg);
+
+typedef struct iflib_filter_info {
+ driver_filter_t *ifi_filter;
+ void *ifi_filter_arg;
+ struct grouptask *ifi_task;
+ void *ifi_ctx;
+} *iflib_filter_info_t;
+
+struct iflib_ctx {
+ KOBJ_FIELDS;
+ /*
+ * Pointer to hardware driver's softc
+ */
+ void *ifc_softc;
+ device_t ifc_dev;
+ if_t ifc_ifp;
+
+ cpuset_t ifc_cpus;
+ if_shared_ctx_t ifc_sctx;
+ struct if_softc_ctx ifc_softc_ctx;
+
+ struct sx ifc_ctx_sx;
+ struct mtx ifc_state_mtx;
+
+ iflib_txq_t ifc_txqs;
+ iflib_rxq_t ifc_rxqs;
+ uint32_t ifc_if_flags;
+ uint32_t ifc_flags;
+ uint32_t ifc_max_fl_buf_size;
+ uint32_t ifc_rx_mbuf_sz;
+
+ int ifc_link_state;
+ int ifc_watchdog_events;
+ struct cdev *ifc_led_dev;
+ struct resource *ifc_msix_mem;
+
+ struct if_irq ifc_legacy_irq;
+ struct grouptask ifc_admin_task;
+ struct grouptask ifc_vflr_task;
+ struct iflib_filter_info ifc_filter_info;
+ struct ifmedia ifc_media;
+
+ struct sysctl_oid *ifc_sysctl_node;
+ uint16_t ifc_sysctl_ntxqs;
+ uint16_t ifc_sysctl_nrxqs;
+ uint16_t ifc_sysctl_qs_eq_override;
+ uint16_t ifc_sysctl_rx_budget;
+ uint16_t ifc_sysctl_tx_abdicate;
+ uint16_t ifc_sysctl_core_offset;
+#define CORE_OFFSET_UNSPECIFIED 0xffff
+ uint8_t ifc_sysctl_separate_txrx;
+
+ qidx_t ifc_sysctl_ntxds[8];
+ qidx_t ifc_sysctl_nrxds[8];
+ struct if_txrx ifc_txrx;
+#define isc_txd_encap ifc_txrx.ift_txd_encap
+#define isc_txd_flush ifc_txrx.ift_txd_flush
+#define isc_txd_credits_update ifc_txrx.ift_txd_credits_update
+#define isc_rxd_available ifc_txrx.ift_rxd_available
+#define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get
+#define isc_rxd_refill ifc_txrx.ift_rxd_refill
+#define isc_rxd_flush ifc_txrx.ift_rxd_flush
+#define isc_rxd_refill ifc_txrx.ift_rxd_refill
+#define isc_rxd_refill ifc_txrx.ift_rxd_refill
+#define isc_legacy_intr ifc_txrx.ift_legacy_intr
+ eventhandler_tag ifc_vlan_attach_event;
+ eventhandler_tag ifc_vlan_detach_event;
+ uint8_t ifc_mac[ETHER_ADDR_LEN];
+};
+
+void *
+iflib_get_softc(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_softc);
+}
+
+device_t
+iflib_get_dev(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_dev);
+}
+
+if_t
+iflib_get_ifp(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_ifp);
+}
+
+struct ifmedia *
+iflib_get_media(if_ctx_t ctx)
+{
+
+ return (&ctx->ifc_media);
+}
+
+uint32_t
+iflib_get_flags(if_ctx_t ctx)
+{
+ return (ctx->ifc_flags);
+}
+
+void
+iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN])
+{
+
+ bcopy(mac, ctx->ifc_mac, ETHER_ADDR_LEN);
+}
+
+if_softc_ctx_t
+iflib_get_softc_ctx(if_ctx_t ctx)
+{
+
+ return (&ctx->ifc_softc_ctx);
+}
+
+if_shared_ctx_t
+iflib_get_sctx(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_sctx);
+}
+
+#define IP_ALIGNED(m) ((((uintptr_t)(m)->m_data) & 0x3) == 0x2)
+#define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*))
+#define CACHE_PTR_NEXT(ptr) ((void *)(((uintptr_t)(ptr)+CACHE_LINE_SIZE-1) & (CACHE_LINE_SIZE-1)))
+
+#define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP)
+#define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF)
+
+typedef struct iflib_sw_rx_desc_array {
+ bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
+ struct mbuf **ifsd_m; /* pkthdr mbufs */
+ caddr_t *ifsd_cl; /* direct cluster pointer for rx */
+ bus_addr_t *ifsd_ba; /* bus addr of cluster for rx */
+} iflib_rxsd_array_t;
+
+typedef struct iflib_sw_tx_desc_array {
+ bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
+ bus_dmamap_t *ifsd_tso_map; /* bus_dma maps for TSO packet */
+ struct mbuf **ifsd_m; /* pkthdr mbufs */
+} if_txsd_vec_t;
+
+/* magic number that should be high enough for any hardware */
+#define IFLIB_MAX_TX_SEGS 128
+#define IFLIB_RX_COPY_THRESH 128
+#define IFLIB_MAX_RX_REFRESH 32
+/* The minimum descriptors per second before we start coalescing */
+#define IFLIB_MIN_DESC_SEC 16384
+#define IFLIB_DEFAULT_TX_UPDATE_FREQ 16
+#define IFLIB_QUEUE_IDLE 0
+#define IFLIB_QUEUE_HUNG 1
+#define IFLIB_QUEUE_WORKING 2
+/* maximum number of txqs that can share an rx interrupt */
+#define IFLIB_MAX_TX_SHARED_INTR 4
+
+/* this should really scale with ring size - this is a fairly arbitrary value */
+#define TX_BATCH_SIZE 32
+
+#define IFLIB_RESTART_BUDGET 8
+
+#define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \
+ CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \
+ CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP)
+
+struct iflib_txq {
+ qidx_t ift_in_use;
+ qidx_t ift_cidx;
+ qidx_t ift_cidx_processed;
+ qidx_t ift_pidx;
+ uint8_t ift_gen;
+ uint8_t ift_br_offset;
+ uint16_t ift_npending;
+ uint16_t ift_db_pending;
+ uint16_t ift_rs_pending;
+ /* implicit pad */
+ uint8_t ift_txd_size[8];
+ uint64_t ift_processed;
+ uint64_t ift_cleaned;
+ uint64_t ift_cleaned_prev;
+#if MEMORY_LOGGING
+ uint64_t ift_enqueued;
+ uint64_t ift_dequeued;
+#endif
+ uint64_t ift_no_tx_dma_setup;
+ uint64_t ift_no_desc_avail;
+ uint64_t ift_mbuf_defrag_failed;
+ uint64_t ift_mbuf_defrag;
+ uint64_t ift_map_failed;
+ uint64_t ift_txd_encap_efbig;
+ uint64_t ift_pullups;
+ uint64_t ift_last_timer_tick;
+
+ struct mtx ift_mtx;
+ struct mtx ift_db_mtx;
+
+ /* constant values */
+ if_ctx_t ift_ctx;
+ struct ifmp_ring *ift_br;
+ struct grouptask ift_task;
+ qidx_t ift_size;
+ uint16_t ift_id;
+ struct callout ift_timer;
+
+ if_txsd_vec_t ift_sds;
+ uint8_t ift_qstatus;
+ uint8_t ift_closed;
+ uint8_t ift_update_freq;
+ struct iflib_filter_info ift_filter_info;
+ bus_dma_tag_t ift_buf_tag;
+ bus_dma_tag_t ift_tso_buf_tag;
+ iflib_dma_info_t ift_ifdi;
+#define MTX_NAME_LEN 16
+ char ift_mtx_name[MTX_NAME_LEN];
+ bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE);
+#ifdef IFLIB_DIAGNOSTICS
+ uint64_t ift_cpu_exec_count[256];
+#endif
+} __aligned(CACHE_LINE_SIZE);
+
+struct iflib_fl {
+ qidx_t ifl_cidx;
+ qidx_t ifl_pidx;
+ qidx_t ifl_credits;
+ uint8_t ifl_gen;
+ uint8_t ifl_rxd_size;
+#if MEMORY_LOGGING
+ uint64_t ifl_m_enqueued;
+ uint64_t ifl_m_dequeued;
+ uint64_t ifl_cl_enqueued;
+ uint64_t ifl_cl_dequeued;
+#endif
+ /* implicit pad */
+
+ bitstr_t *ifl_rx_bitmap;
+ qidx_t ifl_fragidx;
+ /* constant */
+ qidx_t ifl_size;
+ uint16_t ifl_buf_size;
+ uint16_t ifl_cltype;
+ uma_zone_t ifl_zone;
+ iflib_rxsd_array_t ifl_sds;
+ iflib_rxq_t ifl_rxq;
+ uint8_t ifl_id;
+ bus_dma_tag_t ifl_buf_tag;
+ iflib_dma_info_t ifl_ifdi;
+ uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE);
+ caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH];
+ qidx_t ifl_rxd_idxs[IFLIB_MAX_RX_REFRESH];
+} __aligned(CACHE_LINE_SIZE);
+
+static inline qidx_t
+get_inuse(int size, qidx_t cidx, qidx_t pidx, uint8_t gen)
+{
+ qidx_t used;
+
+ if (pidx > cidx)
+ used = pidx - cidx;
+ else if (pidx < cidx)
+ used = size - cidx + pidx;
+ else if (gen == 0 && pidx == cidx)
+ used = 0;
+ else if (gen == 1 && pidx == cidx)
+ used = size;
+ else
+ panic("bad state");
+
+ return (used);
+}
+
+#define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen))
+
+#define IDXDIFF(head, tail, wrap) \
+ ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head))
+
+struct iflib_rxq {
+ if_ctx_t ifr_ctx;
+ iflib_fl_t ifr_fl;
+ uint64_t ifr_rx_irq;
+ /*
+ * If there is a separate completion queue (IFLIB_HAS_RXCQ), this is
+ * the command queue consumer index. Otherwise it's unused.
+ */
+ qidx_t ifr_cq_cidx;
+ uint16_t ifr_id;
+ uint8_t ifr_nfl;
+ uint8_t ifr_ntxqirq;
+ uint8_t ifr_txqid[IFLIB_MAX_TX_SHARED_INTR];
+ uint8_t ifr_fl_offset;
+ struct lro_ctrl ifr_lc;
+ struct grouptask ifr_task;
+ struct iflib_filter_info ifr_filter_info;
+ iflib_dma_info_t ifr_ifdi;
+
+ /* dynamically allocate if any drivers need a value substantially larger than this */
+ struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE);
+#ifdef IFLIB_DIAGNOSTICS
+ uint64_t ifr_cpu_exec_count[256];
+#endif
+} __aligned(CACHE_LINE_SIZE);
+
+typedef struct if_rxsd {
+ caddr_t *ifsd_cl;
+ struct mbuf **ifsd_m;
+ iflib_fl_t ifsd_fl;
+ qidx_t ifsd_cidx;
+} *if_rxsd_t;
+
+/* multiple of word size */
+#ifdef __LP64__
+#define PKT_INFO_SIZE 6
+#define RXD_INFO_SIZE 5
+#define PKT_TYPE uint64_t
+#else
+#define PKT_INFO_SIZE 11
+#define RXD_INFO_SIZE 8
+#define PKT_TYPE uint32_t
+#endif
+#define PKT_LOOP_BOUND ((PKT_INFO_SIZE/3)*3)
+#define RXD_LOOP_BOUND ((RXD_INFO_SIZE/4)*4)
+
+typedef struct if_pkt_info_pad {
+ PKT_TYPE pkt_val[PKT_INFO_SIZE];
+} *if_pkt_info_pad_t;
+typedef struct if_rxd_info_pad {
+ PKT_TYPE rxd_val[RXD_INFO_SIZE];
+} *if_rxd_info_pad_t;
+
+CTASSERT(sizeof(struct if_pkt_info_pad) == sizeof(struct if_pkt_info));
+CTASSERT(sizeof(struct if_rxd_info_pad) == sizeof(struct if_rxd_info));
+
+
+static inline void
+pkt_info_zero(if_pkt_info_t pi)
+{
+ if_pkt_info_pad_t pi_pad;
+
+ pi_pad = (if_pkt_info_pad_t)pi;
+ pi_pad->pkt_val[0] = 0; pi_pad->pkt_val[1] = 0; pi_pad->pkt_val[2] = 0;
+ pi_pad->pkt_val[3] = 0; pi_pad->pkt_val[4] = 0; pi_pad->pkt_val[5] = 0;
+#ifndef __LP64__
+ pi_pad->pkt_val[6] = 0; pi_pad->pkt_val[7] = 0; pi_pad->pkt_val[8] = 0;
+ pi_pad->pkt_val[9] = 0; pi_pad->pkt_val[10] = 0;
+#endif
+}
+
+static device_method_t iflib_pseudo_methods[] = {
+ DEVMETHOD(device_attach, noop_attach),
+ DEVMETHOD(device_detach, iflib_pseudo_detach),
+ DEVMETHOD_END
+};
+
+driver_t iflib_pseudodriver = {
+ "iflib_pseudo", iflib_pseudo_methods, sizeof(struct iflib_ctx),
+};
+
+static inline void
+rxd_info_zero(if_rxd_info_t ri)
+{
+ if_rxd_info_pad_t ri_pad;
+ int i;
+
+ ri_pad = (if_rxd_info_pad_t)ri;
+ for (i = 0; i < RXD_LOOP_BOUND; i += 4) {
+ ri_pad->rxd_val[i] = 0;
+ ri_pad->rxd_val[i+1] = 0;
+ ri_pad->rxd_val[i+2] = 0;
+ ri_pad->rxd_val[i+3] = 0;
+ }
+#ifdef __LP64__
+ ri_pad->rxd_val[RXD_INFO_SIZE-1] = 0;
+#endif
+}
+
+/*
+ * Only allow a single packet to take up most 1/nth of the tx ring
+ */
+#define MAX_SINGLE_PACKET_FRACTION 12
+#define IF_BAD_DMA (bus_addr_t)-1
+
+#define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING))
+
+#define CTX_LOCK_INIT(_sc) sx_init(&(_sc)->ifc_ctx_sx, "iflib ctx lock")
+#define CTX_LOCK(ctx) sx_xlock(&(ctx)->ifc_ctx_sx)
+#define CTX_UNLOCK(ctx) sx_xunlock(&(ctx)->ifc_ctx_sx)
+#define CTX_LOCK_DESTROY(ctx) sx_destroy(&(ctx)->ifc_ctx_sx)
+
+#define STATE_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_state_mtx, _name, "iflib state lock", MTX_DEF)
+#define STATE_LOCK(ctx) mtx_lock(&(ctx)->ifc_state_mtx)
+#define STATE_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_state_mtx)
+#define STATE_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_state_mtx)
+
+#define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx)
+#define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx)
+
+void
+iflib_set_detach(if_ctx_t ctx)
+{
+ STATE_LOCK(ctx);
+ ctx->ifc_flags |= IFC_IN_DETACH;
+ STATE_UNLOCK(ctx);
+}
+
+/* Our boot-time initialization hook */
+static int iflib_module_event_handler(module_t, int, void *);
+
+static moduledata_t iflib_moduledata = {
+ "iflib",
+ iflib_module_event_handler,
+ NULL
+};
+
+DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY);
+MODULE_VERSION(iflib, 1);
+
+MODULE_DEPEND(iflib, pci, 1, 1, 1);
+MODULE_DEPEND(iflib, ether, 1, 1, 1);
+
+TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1);
+TASKQGROUP_DEFINE(if_config_tqg, 1, 1);
+
+#ifndef IFLIB_DEBUG_COUNTERS
+#ifdef INVARIANTS
+#define IFLIB_DEBUG_COUNTERS 1
+#else
+#define IFLIB_DEBUG_COUNTERS 0
+#endif /* !INVARIANTS */
+#endif
+
+static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0,
+ "iflib driver parameters");
+
+/*
+ * XXX need to ensure that this can't accidentally cause the head to be moved backwards
+ */
+static int iflib_min_tx_latency = 0;
+SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW,
+ &iflib_min_tx_latency, 0, "minimize transmit latency at the possible expense of throughput");
+static int iflib_no_tx_batch = 0;
+SYSCTL_INT(_net_iflib, OID_AUTO, no_tx_batch, CTLFLAG_RW,
+ &iflib_no_tx_batch, 0, "minimize transmit latency at the possible expense of throughput");
+
+
+#if IFLIB_DEBUG_COUNTERS
+
+static int iflib_tx_seen;
+static int iflib_tx_sent;
+static int iflib_tx_encap;
+static int iflib_rx_allocs;
+static int iflib_fl_refills;
+static int iflib_fl_refills_large;
+static int iflib_tx_frees;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD,
+ &iflib_tx_seen, 0, "# TX mbufs seen");
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD,
+ &iflib_tx_sent, 0, "# TX mbufs sent");
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD,
+ &iflib_tx_encap, 0, "# TX mbufs encapped");
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD,
+ &iflib_tx_frees, 0, "# TX frees");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD,
+ &iflib_rx_allocs, 0, "# RX allocations");
+SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD,
+ &iflib_fl_refills, 0, "# refills");
+SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD,
+ &iflib_fl_refills_large, 0, "# large refills");
+
+
+static int iflib_txq_drain_flushing;
+static int iflib_txq_drain_oactive;
+static int iflib_txq_drain_notready;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD,
+ &iflib_txq_drain_flushing, 0, "# drain flushes");
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD,
+ &iflib_txq_drain_oactive, 0, "# drain oactives");
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD,
+ &iflib_txq_drain_notready, 0, "# drain notready");
+
+
+static int iflib_encap_load_mbuf_fail;
+static int iflib_encap_pad_mbuf_fail;
+static int iflib_encap_txq_avail_fail;
+static int iflib_encap_txd_encap_fail;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD,
+ &iflib_encap_load_mbuf_fail, 0, "# busdma load failures");
+SYSCTL_INT(_net_iflib, OID_AUTO, encap_pad_mbuf_fail, CTLFLAG_RD,
+ &iflib_encap_pad_mbuf_fail, 0, "# runt frame pad failures");
+SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD,
+ &iflib_encap_txq_avail_fail, 0, "# txq avail failures");
+SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD,
+ &iflib_encap_txd_encap_fail, 0, "# driver encap failures");
+
+static int iflib_task_fn_rxs;
+static int iflib_rx_intr_enables;
+static int iflib_fast_intrs;
+static int iflib_rx_unavail;
+static int iflib_rx_ctx_inactive;
+static int iflib_rx_if_input;
+static int iflib_rx_mbuf_null;
+static int iflib_rxd_flush;
+
+static int iflib_verbose_debug;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD,
+ &iflib_task_fn_rxs, 0, "# task_fn_rx calls");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD,
+ &iflib_rx_intr_enables, 0, "# RX intr enables");
+SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD,
+ &iflib_fast_intrs, 0, "# fast_intr calls");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD,
+ &iflib_rx_unavail, 0, "# times rxeof called with no available data");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD,
+ &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD,
+ &iflib_rx_if_input, 0, "# times rxeof called if_input");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_mbuf_null, CTLFLAG_RD,
+ &iflib_rx_mbuf_null, 0, "# times rxeof got null mbuf");
+SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD,
+ &iflib_rxd_flush, 0, "# times rxd_flush called");
+SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW,
+ &iflib_verbose_debug, 0, "enable verbose debugging");
+
+#define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1)
+static void
+iflib_debug_reset(void)
+{
+ iflib_tx_seen = iflib_tx_sent = iflib_tx_encap = iflib_rx_allocs =
+ iflib_fl_refills = iflib_fl_refills_large = iflib_tx_frees =
+ iflib_txq_drain_flushing = iflib_txq_drain_oactive =
+ iflib_txq_drain_notready =
+ iflib_encap_load_mbuf_fail = iflib_encap_pad_mbuf_fail =
+ iflib_encap_txq_avail_fail = iflib_encap_txd_encap_fail =
+ iflib_task_fn_rxs = iflib_rx_intr_enables = iflib_fast_intrs =
+ iflib_rx_unavail =
+ iflib_rx_ctx_inactive = iflib_rx_if_input =
+ iflib_rx_mbuf_null = iflib_rxd_flush = 0;
+}
+
+#else
+#define DBG_COUNTER_INC(name)
+static void iflib_debug_reset(void) {}
+#endif
+
+#define IFLIB_DEBUG 0
+
+static void iflib_tx_structures_free(if_ctx_t ctx);
+static void iflib_rx_structures_free(if_ctx_t ctx);
+static int iflib_queues_alloc(if_ctx_t ctx);
+static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq);
+static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget);
+static int iflib_qset_structures_setup(if_ctx_t ctx);
+static int iflib_msix_init(if_ctx_t ctx);
+static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, const char *str);
+static void iflib_txq_check_drain(iflib_txq_t txq, int budget);
+static uint32_t iflib_txq_can_drain(struct ifmp_ring *);
+#ifdef ALTQ
+static void iflib_altq_if_start(if_t ifp);
+static int iflib_altq_if_transmit(if_t ifp, struct mbuf *m);
+#endif
+static int iflib_register(if_ctx_t);
+static void iflib_deregister(if_ctx_t);
+static void iflib_init_locked(if_ctx_t ctx);
+static void iflib_add_device_sysctl_pre(if_ctx_t ctx);
+static void iflib_add_device_sysctl_post(if_ctx_t ctx);
+static void iflib_ifmp_purge(iflib_txq_t txq);
+static void _iflib_pre_assert(if_softc_ctx_t scctx);
+static void iflib_if_init_locked(if_ctx_t ctx);
+static void iflib_free_intr_mem(if_ctx_t ctx);
+#ifndef __NO_STRICT_ALIGNMENT
+static struct mbuf * iflib_fixup_rx(struct mbuf *m);
+#endif
+
+static SLIST_HEAD(cpu_offset_list, cpu_offset) cpu_offsets =
+ SLIST_HEAD_INITIALIZER(cpu_offsets);
+struct cpu_offset {
+ SLIST_ENTRY(cpu_offset) entries;
+ cpuset_t set;
+ unsigned int refcount;
+ uint16_t offset;
+};
+static struct mtx cpu_offset_mtx;
+MTX_SYSINIT(iflib_cpu_offset, &cpu_offset_mtx, "iflib_cpu_offset lock",
+ MTX_DEF);
+
+NETDUMP_DEFINE(iflib);
+
+#ifdef DEV_NETMAP
+#include <sys/selinfo.h>
+#include <net/netmap.h>
+#include <dev/netmap/netmap_kern.h>
+
+MODULE_DEPEND(iflib, netmap, 1, 1, 1);
+
+static int netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init);
+
+/*
+ * device-specific sysctl variables:
+ *
+ * iflib_crcstrip: 0: keep CRC in rx frames (default), 1: strip it.
+ * During regular operations the CRC is stripped, but on some
+ * hardware reception of frames not multiple of 64 is slower,
+ * so using crcstrip=0 helps in benchmarks.
+ *
+ * iflib_rx_miss, iflib_rx_miss_bufs:
+ * count packets that might be missed due to lost interrupts.
+ */
+SYSCTL_DECL(_dev_netmap);
+/*
+ * The xl driver by default strips CRCs and we do not override it.
+ */
+
+int iflib_crcstrip = 1;
+SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip,
+ CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on RX frames");
+
+int iflib_rx_miss, iflib_rx_miss_bufs;
+SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss,
+ CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed RX intr");
+SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss_bufs,
+ CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed RX intr bufs");
+
+/*
+ * Register/unregister. We are already under netmap lock.
+ * Only called on the first register or the last unregister.
+ */
+static int
+iflib_netmap_register(struct netmap_adapter *na, int onoff)
+{
+ if_t ifp = na->ifp;
+ if_ctx_t ctx = ifp->if_softc;
+ int status;
+
+ CTX_LOCK(ctx);
+ IFDI_INTR_DISABLE(ctx);
+
+ /* Tell the stack that the interface is no longer active */
+ ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
+
+ if (!CTX_IS_VF(ctx))
+ IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip);
+
+ /* enable or disable flags and callbacks in na and ifp */
+ if (onoff) {
+ nm_set_native_flags(na);
+ } else {
+ nm_clear_native_flags(na);
+ }
+ iflib_stop(ctx);
+ iflib_init_locked(ctx);
+ IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip); // XXX why twice ?
+ status = ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1;
+ if (status)
+ nm_clear_native_flags(na);
+ CTX_UNLOCK(ctx);
+ return (status);
+}
+
+static int
+netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init)
+{
+ struct netmap_adapter *na = kring->na;
+ u_int const lim = kring->nkr_num_slots - 1;
+ u_int head = kring->rhead;
+ struct netmap_ring *ring = kring->ring;
+ bus_dmamap_t *map;
+ struct if_rxd_update iru;
+ if_ctx_t ctx = rxq->ifr_ctx;
+ iflib_fl_t fl = &rxq->ifr_fl[0];
+ uint32_t refill_pidx, nic_i;
+#if IFLIB_DEBUG_COUNTERS
+ int rf_count = 0;
+#endif
+
+ if (nm_i == head && __predict_true(!init))
+ return 0;
+ iru_init(&iru, rxq, 0 /* flid */);
+ map = fl->ifl_sds.ifsd_map;
+ refill_pidx = netmap_idx_k2n(kring, nm_i);
+ /*
+ * IMPORTANT: we must leave one free slot in the ring,
+ * so move head back by one unit
+ */
+ head = nm_prev(head, lim);
+ nic_i = UINT_MAX;
+ DBG_COUNTER_INC(fl_refills);
+ while (nm_i != head) {
+#if IFLIB_DEBUG_COUNTERS
+ if (++rf_count == 9)
+ DBG_COUNTER_INC(fl_refills_large);
+#endif
+ for (int tmp_pidx = 0; tmp_pidx < IFLIB_MAX_RX_REFRESH && nm_i != head; tmp_pidx++) {
+ struct netmap_slot *slot = &ring->slot[nm_i];
+ void *addr = PNMB(na, slot, &fl->ifl_bus_addrs[tmp_pidx]);
+ uint32_t nic_i_dma = refill_pidx;
+ nic_i = netmap_idx_k2n(kring, nm_i);
+
+ MPASS(tmp_pidx < IFLIB_MAX_RX_REFRESH);
+
+ if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
+ return netmap_ring_reinit(kring);
+
+ fl->ifl_vm_addrs[tmp_pidx] = addr;
+ if (__predict_false(init)) {
+ netmap_load_map(na, fl->ifl_buf_tag,
+ map[nic_i], addr);
+ } else if (slot->flags & NS_BUF_CHANGED) {
+ /* buffer has changed, reload map */
+ netmap_reload_map(na, fl->ifl_buf_tag,
+ map[nic_i], addr);
+ }
+ slot->flags &= ~NS_BUF_CHANGED;
+
+ nm_i = nm_next(nm_i, lim);
+ fl->ifl_rxd_idxs[tmp_pidx] = nic_i = nm_next(nic_i, lim);
+ if (nm_i != head && tmp_pidx < IFLIB_MAX_RX_REFRESH-1)
+ continue;
+
+ iru.iru_pidx = refill_pidx;
+ iru.iru_count = tmp_pidx+1;
+ ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
+ refill_pidx = nic_i;
+ for (int n = 0; n < iru.iru_count; n++) {
+ bus_dmamap_sync(fl->ifl_buf_tag, map[nic_i_dma],
+ BUS_DMASYNC_PREREAD);
+ /* XXX - change this to not use the netmap func*/
+ nic_i_dma = nm_next(nic_i_dma, lim);
+ }
+ }
+ }
+ kring->nr_hwcur = head;
+
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ if (__predict_true(nic_i != UINT_MAX)) {
+ ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i);
+ DBG_COUNTER_INC(rxd_flush);
+ }
+ return (0);
+}
+
+/*
+ * Reconcile kernel and user view of the transmit ring.
+ *
+ * All information is in the kring.
+ * Userspace wants to send packets up to the one before kring->rhead,
+ * kernel knows kring->nr_hwcur is the first unsent packet.
+ *
+ * Here we push packets out (as many as possible), and possibly
+ * reclaim buffers from previously completed transmission.
+ *
+ * The caller (netmap) guarantees that there is only one instance
+ * running at any time. Any interference with other driver
+ * methods should be handled by the individual drivers.
+ */
+static int
+iflib_netmap_txsync(struct netmap_kring *kring, int flags)
+{
+ struct netmap_adapter *na = kring->na;
+ if_t ifp = na->ifp;
+ struct netmap_ring *ring = kring->ring;
+ u_int nm_i; /* index into the netmap kring */
+ u_int nic_i; /* index into the NIC ring */
+ u_int n;
+ u_int const lim = kring->nkr_num_slots - 1;
+ u_int const head = kring->rhead;
+ struct if_pkt_info pi;
+
+ /*
+ * interrupts on every tx packet are expensive so request
+ * them every half ring, or where NS_REPORT is set
+ */
+ u_int report_frequency = kring->nkr_num_slots >> 1;
+ /* device-specific */
+ if_ctx_t ctx = ifp->if_softc;
+ iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id];
+
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+
+ /*
+ * First part: process new packets to send.
+ * nm_i is the current index in the netmap kring,
+ * nic_i is the corresponding index in the NIC ring.
+ *
+ * If we have packets to send (nm_i != head)
+ * iterate over the netmap ring, fetch length and update
+ * the corresponding slot in the NIC ring. Some drivers also
+ * need to update the buffer's physical address in the NIC slot
+ * even NS_BUF_CHANGED is not set (PNMB computes the addresses).
+ *
+ * The netmap_reload_map() calls is especially expensive,
+ * even when (as in this case) the tag is 0, so do only
+ * when the buffer has actually changed.
+ *
+ * If possible do not set the report/intr bit on all slots,
+ * but only a few times per ring or when NS_REPORT is set.
+ *
+ * Finally, on 10G and faster drivers, it might be useful
+ * to prefetch the next slot and txr entry.
+ */
+
+ nm_i = kring->nr_hwcur;
+ if (nm_i != head) { /* we have new packets to send */
+ pkt_info_zero(&pi);
+ pi.ipi_segs = txq->ift_segs;
+ pi.ipi_qsidx = kring->ring_id;
+ nic_i = netmap_idx_k2n(kring, nm_i);
+
+ __builtin_prefetch(&ring->slot[nm_i]);
+ __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]);
+ __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]);
+
+ for (n = 0; nm_i != head; n++) {
+ struct netmap_slot *slot = &ring->slot[nm_i];
+ u_int len = slot->len;
+ uint64_t paddr;
+ void *addr = PNMB(na, slot, &paddr);
+ int flags = (slot->flags & NS_REPORT ||
+ nic_i == 0 || nic_i == report_frequency) ?
+ IPI_TX_INTR : 0;
+
+ /* device-specific */
+ pi.ipi_len = len;
+ pi.ipi_segs[0].ds_addr = paddr;
+ pi.ipi_segs[0].ds_len = len;
+ pi.ipi_nsegs = 1;
+ pi.ipi_ndescs = 0;
+ pi.ipi_pidx = nic_i;
+ pi.ipi_flags = flags;
+
+ /* Fill the slot in the NIC ring. */
+ ctx->isc_txd_encap(ctx->ifc_softc, &pi);
+ DBG_COUNTER_INC(tx_encap);
+
+ /* prefetch for next round */
+ __builtin_prefetch(&ring->slot[nm_i + 1]);
+ __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]);
+ __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]);
+
+ NM_CHECK_ADDR_LEN(na, addr, len);
+
+ if (slot->flags & NS_BUF_CHANGED) {
+ /* buffer has changed, reload map */
+ netmap_reload_map(na, txq->ift_buf_tag,
+ txq->ift_sds.ifsd_map[nic_i], addr);
+ }
+ /* make sure changes to the buffer are synced */
+ bus_dmamap_sync(txq->ift_buf_tag,
+ txq->ift_sds.ifsd_map[nic_i],
+ BUS_DMASYNC_PREWRITE);
+
+ slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
+ nm_i = nm_next(nm_i, lim);
+ nic_i = nm_next(nic_i, lim);
+ }
+ kring->nr_hwcur = nm_i;
+
+ /* synchronize the NIC ring */
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+
+ /* (re)start the tx unit up to slot nic_i (excluded) */
+ ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i);
+ }
+
+ /*
+ * Second part: reclaim buffers for completed transmissions.
+ *
+ * If there are unclaimed buffers, attempt to reclaim them.
+ * If none are reclaimed, and TX IRQs are not in use, do an initial
+ * minimal delay, then trigger the tx handler which will spin in the
+ * group task queue.
+ */
+ if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) {
+ if (iflib_tx_credits_update(ctx, txq)) {
+ /* some tx completed, increment avail */
+ nic_i = txq->ift_cidx_processed;
+ kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
+ }
+ }
+ if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ))
+ if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) {
+ callout_reset_on(&txq->ift_timer, hz < 2000 ? 1 : hz / 1000,
+ iflib_timer, txq, txq->ift_timer.c_cpu);
+ }
+ return (0);
+}
+
+/*
+ * Reconcile kernel and user view of the receive ring.
+ * Same as for the txsync, this routine must be efficient.
+ * The caller guarantees a single invocations, but races against
+ * the rest of the driver should be handled here.
+ *
+ * On call, kring->rhead is the first packet that userspace wants
+ * to keep, and kring->rcur is the wakeup point.
+ * The kernel has previously reported packets up to kring->rtail.
+ *
+ * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective
+ * of whether or not we received an interrupt.
+ */
+static int
+iflib_netmap_rxsync(struct netmap_kring *kring, int flags)
+{
+ struct netmap_adapter *na = kring->na;
+ struct netmap_ring *ring = kring->ring;
+ if_t ifp = na->ifp;
+ iflib_fl_t fl;
+ uint32_t nm_i; /* index into the netmap ring */
+ uint32_t nic_i; /* index into the NIC ring */
+ u_int i, n;
+ u_int const lim = kring->nkr_num_slots - 1;
+ u_int const head = kring->rhead;
+ int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
+ struct if_rxd_info ri;
+
+ if_ctx_t ctx = ifp->if_softc;
+ iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id];
+ if (head > lim)
+ return netmap_ring_reinit(kring);
+
+ /*
+ * XXX netmap_fl_refill() only ever (re)fills free list 0 so far.
+ */
+
+ for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) {
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+ }
+
+ /*
+ * First part: import newly received packets.
+ *
+ * nm_i is the index of the next free slot in the netmap ring,
+ * nic_i is the index of the next received packet in the NIC ring,
+ * and they may differ in case if_init() has been called while
+ * in netmap mode. For the receive ring we have
+ *
+ * nic_i = rxr->next_check;
+ * nm_i = kring->nr_hwtail (previous)
+ * and
+ * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
+ *
+ * rxr->next_check is set to 0 on a ring reinit
+ */
+ if (netmap_no_pendintr || force_update) {
+ int crclen = iflib_crcstrip ? 0 : 4;
+ int error, avail;
+
+ for (i = 0; i < rxq->ifr_nfl; i++) {
+ fl = &rxq->ifr_fl[i];
+ nic_i = fl->ifl_cidx;
+ nm_i = netmap_idx_n2k(kring, nic_i);
+ avail = ctx->isc_rxd_available(ctx->ifc_softc,
+ rxq->ifr_id, nic_i, USHRT_MAX);
+ for (n = 0; avail > 0; n++, avail--) {
+ rxd_info_zero(&ri);
+ ri.iri_frags = rxq->ifr_frags;
+ ri.iri_qsidx = kring->ring_id;
+ ri.iri_ifp = ctx->ifc_ifp;
+ ri.iri_cidx = nic_i;
+
+ error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
+ ring->slot[nm_i].len = error ? 0 : ri.iri_len - crclen;
+ ring->slot[nm_i].flags = 0;
+ bus_dmamap_sync(fl->ifl_buf_tag,
+ fl->ifl_sds.ifsd_map[nic_i], BUS_DMASYNC_POSTREAD);
+ nm_i = nm_next(nm_i, lim);
+ nic_i = nm_next(nic_i, lim);
+ }
+ if (n) { /* update the state variables */
+ if (netmap_no_pendintr && !force_update) {
+ /* diagnostics */
+ iflib_rx_miss ++;
+ iflib_rx_miss_bufs += n;
+ }
+ fl->ifl_cidx = nic_i;
+ kring->nr_hwtail = nm_i;
+ }
+ kring->nr_kflags &= ~NKR_PENDINTR;
+ }
+ }
+ /*
+ * Second part: skip past packets that userspace has released.
+ * (kring->nr_hwcur to head excluded),
+ * and make the buffers available for reception.
+ * As usual nm_i is the index in the netmap ring,
+ * nic_i is the index in the NIC ring, and
+ * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
+ */
+ /* XXX not sure how this will work with multiple free lists */
+ nm_i = kring->nr_hwcur;
+
+ return (netmap_fl_refill(rxq, kring, nm_i, false));
+}
+
+static void
+iflib_netmap_intr(struct netmap_adapter *na, int onoff)
+{
+ if_ctx_t ctx = na->ifp->if_softc;
+
+ CTX_LOCK(ctx);
+ if (onoff) {
+ IFDI_INTR_ENABLE(ctx);
+ } else {
+ IFDI_INTR_DISABLE(ctx);
+ }
+ CTX_UNLOCK(ctx);
+}
+
+
+static int
+iflib_netmap_attach(if_ctx_t ctx)
+{
+ struct netmap_adapter na;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+
+ bzero(&na, sizeof(na));
+
+ na.ifp = ctx->ifc_ifp;
+ na.na_flags = NAF_BDG_MAYSLEEP;
+ MPASS(ctx->ifc_softc_ctx.isc_ntxqsets);
+ MPASS(ctx->ifc_softc_ctx.isc_nrxqsets);
+
+ na.num_tx_desc = scctx->isc_ntxd[0];
+ na.num_rx_desc = scctx->isc_nrxd[0];
+ na.nm_txsync = iflib_netmap_txsync;
+ na.nm_rxsync = iflib_netmap_rxsync;
+ na.nm_register = iflib_netmap_register;
+ na.nm_intr = iflib_netmap_intr;
+ na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets;
+ na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets;
+ return (netmap_attach(&na));
+}
+
+static void
+iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq)
+{
+ struct netmap_adapter *na = NA(ctx->ifc_ifp);
+ struct netmap_slot *slot;
+
+ slot = netmap_reset(na, NR_TX, txq->ift_id, 0);
+ if (slot == NULL)
+ return;
+ for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxd[0]; i++) {
+
+ /*
+ * In netmap mode, set the map for the packet buffer.
+ * NOTE: Some drivers (not this one) also need to set
+ * the physical buffer address in the NIC ring.
+ * netmap_idx_n2k() maps a nic index, i, into the corresponding
+ * netmap slot index, si
+ */
+ int si = netmap_idx_n2k(na->tx_rings[txq->ift_id], i);
+ netmap_load_map(na, txq->ift_buf_tag, txq->ift_sds.ifsd_map[i],
+ NMB(na, slot + si));
+ }
+}
+
+static void
+iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq)
+{
+ struct netmap_adapter *na = NA(ctx->ifc_ifp);
+ struct netmap_kring *kring = na->rx_rings[rxq->ifr_id];
+ struct netmap_slot *slot;
+ uint32_t nm_i;
+
+ slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0);
+ if (slot == NULL)
+ return;
+ nm_i = netmap_idx_n2k(kring, 0);
+ netmap_fl_refill(rxq, kring, nm_i, true);
+}
+
+static void
+iflib_netmap_timer_adjust(if_ctx_t ctx, iflib_txq_t txq, uint32_t *reset_on)
+{
+ struct netmap_kring *kring;
+ uint16_t txqid;
+
+ txqid = txq->ift_id;
+ kring = NA(ctx->ifc_ifp)->tx_rings[txqid];
+
+ if (kring->nr_hwcur != nm_next(kring->nr_hwtail, kring->nkr_num_slots - 1)) {
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD);
+ if (ctx->isc_txd_credits_update(ctx->ifc_softc, txqid, false))
+ netmap_tx_irq(ctx->ifc_ifp, txqid);
+ if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ)) {
+ if (hz < 2000)
+ *reset_on = 1;
+ else
+ *reset_on = hz / 1000;
+ }
+ }
+}
+
+#define iflib_netmap_detach(ifp) netmap_detach(ifp)
+
+#else
+#define iflib_netmap_txq_init(ctx, txq)
+#define iflib_netmap_rxq_init(ctx, rxq)
+#define iflib_netmap_detach(ifp)
+
+#define iflib_netmap_attach(ctx) (0)
+#define netmap_rx_irq(ifp, qid, budget) (0)
+#define netmap_tx_irq(ifp, qid) do {} while (0)
+#define iflib_netmap_timer_adjust(ctx, txq, reset_on)
+
+#endif
+
+#if defined(__i386__) || defined(__amd64__)
+static __inline void
+prefetch(void *x)
+{
+ __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
+}
+static __inline void
+prefetch2cachelines(void *x)
+{
+ __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
+#if (CACHE_LINE_SIZE < 128)
+ __asm volatile("prefetcht0 %0" :: "m" (*(((unsigned long *)x)+CACHE_LINE_SIZE/(sizeof(unsigned long)))));
+#endif
+}
+#else
+#define prefetch(x)
+#define prefetch2cachelines(x)
+#endif
+
+static void
+iflib_gen_mac(if_ctx_t ctx)
+{
+ struct thread *td;
+ MD5_CTX mdctx;
+ char uuid[HOSTUUIDLEN+1];
+ char buf[HOSTUUIDLEN+16];
+ uint8_t *mac;
+ unsigned char digest[16];
+
+ td = curthread;
+ mac = ctx->ifc_mac;
+ uuid[HOSTUUIDLEN] = 0;
+ bcopy(td->td_ucred->cr_prison->pr_hostuuid, uuid, HOSTUUIDLEN);
+ snprintf(buf, HOSTUUIDLEN+16, "%s-%s", uuid, device_get_nameunit(ctx->ifc_dev));
+ /*
+ * Generate a pseudo-random, deterministic MAC
+ * address based on the UUID and unit number.
+ * The FreeBSD Foundation OUI of 58-9C-FC is used.
+ */
+ MD5Init(&mdctx);
+ MD5Update(&mdctx, buf, strlen(buf));
+ MD5Final(digest, &mdctx);
+
+ mac[0] = 0x58;
+ mac[1] = 0x9C;
+ mac[2] = 0xFC;
+ mac[3] = digest[0];
+ mac[4] = digest[1];
+ mac[5] = digest[2];
+}
+
+static void
+iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid)
+{
+ iflib_fl_t fl;
+
+ fl = &rxq->ifr_fl[flid];
+ iru->iru_paddrs = fl->ifl_bus_addrs;
+ iru->iru_vaddrs = &fl->ifl_vm_addrs[0];
+ iru->iru_idxs = fl->ifl_rxd_idxs;
+ iru->iru_qsidx = rxq->ifr_id;
+ iru->iru_buf_size = fl->ifl_buf_size;
+ iru->iru_flidx = fl->ifl_id;
+}
+
+static void
+_iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
+{
+ if (err)
+ return;
+ *(bus_addr_t *) arg = segs[0].ds_addr;
+}
+
+int
+iflib_dma_alloc_align(if_ctx_t ctx, int size, int align, iflib_dma_info_t dma, int mapflags)
+{
+ int err;
+ device_t dev = ctx->ifc_dev;
+
+ err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
+ align, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ size, /* maxsize */
+ 1, /* nsegments */
+ size, /* maxsegsize */
+ BUS_DMA_ALLOCNOW, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockarg */
+ &dma->idi_tag);
+ if (err) {
+ device_printf(dev,
+ "%s: bus_dma_tag_create failed: %d\n",
+ __func__, err);
+ goto fail_0;
+ }
+
+ err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr,
+ BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map);
+ if (err) {
+ device_printf(dev,
+ "%s: bus_dmamem_alloc(%ju) failed: %d\n",
+ __func__, (uintmax_t)size, err);
+ goto fail_1;
+ }
+
+ dma->idi_paddr = IF_BAD_DMA;
+ err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr,
+ size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT);
+ if (err || dma->idi_paddr == IF_BAD_DMA) {
+ device_printf(dev,
+ "%s: bus_dmamap_load failed: %d\n",
+ __func__, err);
+ goto fail_2;
+ }
+
+ dma->idi_size = size;
+ return (0);
+
+fail_2:
+ bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map);
+fail_1:
+ bus_dma_tag_destroy(dma->idi_tag);
+fail_0:
+ dma->idi_tag = NULL;
+
+ return (err);
+}
+
+int
+iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags)
+{
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+
+ KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized"));
+
+ return (iflib_dma_alloc_align(ctx, size, sctx->isc_q_align, dma, mapflags));
+}
+
+int
+iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count)
+{
+ int i, err;
+ iflib_dma_info_t *dmaiter;
+
+ dmaiter = dmalist;
+ for (i = 0; i < count; i++, dmaiter++) {
+ if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0)
+ break;
+ }
+ if (err)
+ iflib_dma_free_multi(dmalist, i);
+ return (err);
+}
+
+void
+iflib_dma_free(iflib_dma_info_t dma)
+{
+ if (dma->idi_tag == NULL)
+ return;
+ if (dma->idi_paddr != IF_BAD_DMA) {
+ bus_dmamap_sync(dma->idi_tag, dma->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(dma->idi_tag, dma->idi_map);
+ dma->idi_paddr = IF_BAD_DMA;
+ }
+ if (dma->idi_vaddr != NULL) {
+ bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map);
+ dma->idi_vaddr = NULL;
+ }
+ bus_dma_tag_destroy(dma->idi_tag);
+ dma->idi_tag = NULL;
+}
+
+void
+iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count)
+{
+ int i;
+ iflib_dma_info_t *dmaiter = dmalist;
+
+ for (i = 0; i < count; i++, dmaiter++)
+ iflib_dma_free(*dmaiter);
+}
+
+#ifdef EARLY_AP_STARTUP
+static const int iflib_started = 1;
+#else
+/*
+ * We used to abuse the smp_started flag to decide if the queues have been
+ * fully initialized (by late taskqgroup_adjust() calls in a SYSINIT()).
+ * That gave bad races, since the SYSINIT() runs strictly after smp_started
+ * is set. Run a SYSINIT() strictly after that to just set a usable
+ * completion flag.
+ */
+
+static int iflib_started;
+
+static void
+iflib_record_started(void *arg)
+{
+ iflib_started = 1;
+}
+
+SYSINIT(iflib_record_started, SI_SUB_SMP + 1, SI_ORDER_FIRST,
+ iflib_record_started, NULL);
+#endif
+
+static int
+iflib_fast_intr(void *arg)
+{
+ iflib_filter_info_t info = arg;
+ struct grouptask *gtask = info->ifi_task;
+ int result;
+
+ if (!iflib_started)
+ return (FILTER_STRAY);
+
+ DBG_COUNTER_INC(fast_intrs);
+ if (info->ifi_filter != NULL) {
+ result = info->ifi_filter(info->ifi_filter_arg);
+ if ((result & FILTER_SCHEDULE_THREAD) == 0)
+ return (result);
+ }
+
+ GROUPTASK_ENQUEUE(gtask);
+ return (FILTER_HANDLED);
+}
+
+static int
+iflib_fast_intr_rxtx(void *arg)
+{
+ iflib_filter_info_t info = arg;
+ struct grouptask *gtask = info->ifi_task;
+ if_ctx_t ctx;
+ iflib_rxq_t rxq = (iflib_rxq_t)info->ifi_ctx;
+ iflib_txq_t txq;
+ void *sc;
+ int i, cidx, result;
+ qidx_t txqid;
+ bool intr_enable, intr_legacy;
+
+ if (!iflib_started)
+ return (FILTER_STRAY);
+
+ DBG_COUNTER_INC(fast_intrs);
+ if (info->ifi_filter != NULL) {
+ result = info->ifi_filter(info->ifi_filter_arg);
+ if ((result & FILTER_SCHEDULE_THREAD) == 0)
+ return (result);
+ }
+
+ ctx = rxq->ifr_ctx;
+ sc = ctx->ifc_softc;
+ intr_enable = false;
+ intr_legacy = !!(ctx->ifc_flags & IFC_LEGACY);
+ MPASS(rxq->ifr_ntxqirq);
+ for (i = 0; i < rxq->ifr_ntxqirq; i++) {
+ txqid = rxq->ifr_txqid[i];
+ txq = &ctx->ifc_txqs[txqid];
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD);
+ if (!ctx->isc_txd_credits_update(sc, txqid, false)) {
+ if (intr_legacy)
+ intr_enable = true;
+ else
+ IFDI_TX_QUEUE_INTR_ENABLE(ctx, txqid);
+ continue;
+ }
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+ }
+ if (ctx->ifc_sctx->isc_flags & IFLIB_HAS_RXCQ)
+ cidx = rxq->ifr_cq_cidx;
+ else
+ cidx = rxq->ifr_fl[0].ifl_cidx;
+ if (iflib_rxd_avail(ctx, rxq, cidx, 1))
+ GROUPTASK_ENQUEUE(gtask);
+ else {
+ if (intr_legacy)
+ intr_enable = true;
+ else
+ IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
+ DBG_COUNTER_INC(rx_intr_enables);
+ }
+ if (intr_enable)
+ IFDI_INTR_ENABLE(ctx);
+ return (FILTER_HANDLED);
+}
+
+
+static int
+iflib_fast_intr_ctx(void *arg)
+{
+ iflib_filter_info_t info = arg;
+ struct grouptask *gtask = info->ifi_task;
+ int result;
+
+ if (!iflib_started)
+ return (FILTER_STRAY);
+
+ DBG_COUNTER_INC(fast_intrs);
+ if (info->ifi_filter != NULL) {
+ result = info->ifi_filter(info->ifi_filter_arg);
+ if ((result & FILTER_SCHEDULE_THREAD) == 0)
+ return (result);
+ }
+
+ GROUPTASK_ENQUEUE(gtask);
+ return (FILTER_HANDLED);
+}
+
+static int
+_iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
+ driver_filter_t filter, driver_intr_t handler, void *arg,
+ const char *name)
+{
+ int rc, flags;
+ struct resource *res;
+ void *tag = NULL;
+ device_t dev = ctx->ifc_dev;
+
+ flags = RF_ACTIVE;
+ if (ctx->ifc_flags & IFC_LEGACY)
+ flags |= RF_SHAREABLE;
+ MPASS(rid < 512);
+ irq->ii_rid = rid;
+ res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq->ii_rid, flags);
+ if (res == NULL) {
+ device_printf(dev,
+ "failed to allocate IRQ for rid %d, name %s.\n", rid, name);
+ return (ENOMEM);
+ }
+ irq->ii_res = res;
+ KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL"));
+ rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET,
+ filter, handler, arg, &tag);
+ if (rc != 0) {
+ device_printf(dev,
+ "failed to setup interrupt for rid %d, name %s: %d\n",
+ rid, name ? name : "unknown", rc);
+ return (rc);
+ } else if (name)
+ bus_describe_intr(dev, res, tag, "%s", name);
+
+ irq->ii_tag = tag;
+ return (0);
+}
+
+
+/*********************************************************************
+ *
+ * Allocate DMA resources for TX buffers as well as memory for the TX
+ * mbuf map. TX DMA maps (non-TSO/TSO) and TX mbuf map are kept in a
+ * iflib_sw_tx_desc_array structure, storing all the information that
+ * is needed to transmit a packet on the wire. This is called only
+ * once at attach, setup is done every reset.
+ *
+ **********************************************************************/
+static int
+iflib_txsd_alloc(iflib_txq_t txq)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ device_t dev = ctx->ifc_dev;
+ bus_size_t tsomaxsize;
+ int err, nsegments, ntsosegments;
+ bool tso;
+
+ nsegments = scctx->isc_tx_nsegments;
+ ntsosegments = scctx->isc_tx_tso_segments_max;
+ tsomaxsize = scctx->isc_tx_tso_size_max;
+ if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_VLAN_MTU)
+ tsomaxsize += sizeof(struct ether_vlan_header);
+ MPASS(scctx->isc_ntxd[0] > 0);
+ MPASS(scctx->isc_ntxd[txq->ift_br_offset] > 0);
+ MPASS(nsegments > 0);
+ if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) {
+ MPASS(ntsosegments > 0);
+ MPASS(sctx->isc_tso_maxsize >= tsomaxsize);
+ }
+
+ /*
+ * Set up DMA tags for TX buffers.
+ */
+ if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
+ 1, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ sctx->isc_tx_maxsize, /* maxsize */
+ nsegments, /* nsegments */
+ sctx->isc_tx_maxsegsize, /* maxsegsize */
+ 0, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockfuncarg */
+ &txq->ift_buf_tag))) {
+ device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err);
+ device_printf(dev,"maxsize: %ju nsegments: %d maxsegsize: %ju\n",
+ (uintmax_t)sctx->isc_tx_maxsize, nsegments, (uintmax_t)sctx->isc_tx_maxsegsize);
+ goto fail;
+ }
+ tso = (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) != 0;
+ if (tso && (err = bus_dma_tag_create(bus_get_dma_tag(dev),
+ 1, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ tsomaxsize, /* maxsize */
+ ntsosegments, /* nsegments */
+ sctx->isc_tso_maxsegsize,/* maxsegsize */
+ 0, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockfuncarg */
+ &txq->ift_tso_buf_tag))) {
+ device_printf(dev, "Unable to allocate TSO TX DMA tag: %d\n",
+ err);
+ goto fail;
+ }
+
+ /* Allocate memory for the TX mbuf map. */
+ if (!(txq->ift_sds.ifsd_m =
+ (struct mbuf **) malloc(sizeof(struct mbuf *) *
+ scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate TX mbuf map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /*
+ * Create the DMA maps for TX buffers.
+ */
+ if ((txq->ift_sds.ifsd_map = (bus_dmamap_t *)malloc(
+ sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset],
+ M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
+ device_printf(dev,
+ "Unable to allocate TX buffer DMA map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+ if (tso && (txq->ift_sds.ifsd_tso_map = (bus_dmamap_t *)malloc(
+ sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset],
+ M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
+ device_printf(dev,
+ "Unable to allocate TSO TX buffer map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+ for (int i = 0; i < scctx->isc_ntxd[txq->ift_br_offset]; i++) {
+ err = bus_dmamap_create(txq->ift_buf_tag, 0,
+ &txq->ift_sds.ifsd_map[i]);
+ if (err != 0) {
+ device_printf(dev, "Unable to create TX DMA map\n");
+ goto fail;
+ }
+ if (!tso)
+ continue;
+ err = bus_dmamap_create(txq->ift_tso_buf_tag, 0,
+ &txq->ift_sds.ifsd_tso_map[i]);
+ if (err != 0) {
+ device_printf(dev, "Unable to create TSO TX DMA map\n");
+ goto fail;
+ }
+ }
+ return (0);
+fail:
+ /* We free all, it handles case where we are in the middle */
+ iflib_tx_structures_free(ctx);
+ return (err);
+}
+
+static void
+iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i)
+{
+ bus_dmamap_t map;
+
+ map = NULL;
+ if (txq->ift_sds.ifsd_map != NULL)
+ map = txq->ift_sds.ifsd_map[i];
+ if (map != NULL) {
+ bus_dmamap_sync(txq->ift_buf_tag, map, BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_buf_tag, map);
+ bus_dmamap_destroy(txq->ift_buf_tag, map);
+ txq->ift_sds.ifsd_map[i] = NULL;
+ }
+
+ map = NULL;
+ if (txq->ift_sds.ifsd_tso_map != NULL)
+ map = txq->ift_sds.ifsd_tso_map[i];
+ if (map != NULL) {
+ bus_dmamap_sync(txq->ift_tso_buf_tag, map,
+ BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_tso_buf_tag, map);
+ bus_dmamap_destroy(txq->ift_tso_buf_tag, map);
+ txq->ift_sds.ifsd_tso_map[i] = NULL;
+ }
+}
+
+static void
+iflib_txq_destroy(iflib_txq_t txq)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+
+ for (int i = 0; i < txq->ift_size; i++)
+ iflib_txsd_destroy(ctx, txq, i);
+ if (txq->ift_sds.ifsd_map != NULL) {
+ free(txq->ift_sds.ifsd_map, M_IFLIB);
+ txq->ift_sds.ifsd_map = NULL;
+ }
+ if (txq->ift_sds.ifsd_tso_map != NULL) {
+ free(txq->ift_sds.ifsd_tso_map, M_IFLIB);
+ txq->ift_sds.ifsd_tso_map = NULL;
+ }
+ if (txq->ift_sds.ifsd_m != NULL) {
+ free(txq->ift_sds.ifsd_m, M_IFLIB);
+ txq->ift_sds.ifsd_m = NULL;
+ }
+ if (txq->ift_buf_tag != NULL) {
+ bus_dma_tag_destroy(txq->ift_buf_tag);
+ txq->ift_buf_tag = NULL;
+ }
+ if (txq->ift_tso_buf_tag != NULL) {
+ bus_dma_tag_destroy(txq->ift_tso_buf_tag);
+ txq->ift_tso_buf_tag = NULL;
+ }
+}
+
+static void
+iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i)
+{
+ struct mbuf **mp;
+
+ mp = &txq->ift_sds.ifsd_m[i];
+ if (*mp == NULL)
+ return;
+
+ if (txq->ift_sds.ifsd_map != NULL) {
+ bus_dmamap_sync(txq->ift_buf_tag,
+ txq->ift_sds.ifsd_map[i], BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[i]);
+ }
+ if (txq->ift_sds.ifsd_tso_map != NULL) {
+ bus_dmamap_sync(txq->ift_tso_buf_tag,
+ txq->ift_sds.ifsd_tso_map[i], BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_tso_buf_tag,
+ txq->ift_sds.ifsd_tso_map[i]);
+ }
+ m_free(*mp);
+ DBG_COUNTER_INC(tx_frees);
+ *mp = NULL;
+}
+
+static int
+iflib_txq_setup(iflib_txq_t txq)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ iflib_dma_info_t di;
+ int i;
+
+ /* Set number of descriptors available */
+ txq->ift_qstatus = IFLIB_QUEUE_IDLE;
+ /* XXX make configurable */
+ txq->ift_update_freq = IFLIB_DEFAULT_TX_UPDATE_FREQ;
+
+ /* Reset indices */
+ txq->ift_cidx_processed = 0;
+ txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0;
+ txq->ift_size = scctx->isc_ntxd[txq->ift_br_offset];
+
+ for (i = 0, di = txq->ift_ifdi; i < sctx->isc_ntxqs; i++, di++)
+ bzero((void *)di->idi_vaddr, di->idi_size);
+
+ IFDI_TXQ_SETUP(ctx, txq->ift_id);
+ for (i = 0, di = txq->ift_ifdi; i < sctx->isc_ntxqs; i++, di++)
+ bus_dmamap_sync(di->idi_tag, di->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ return (0);
+}
+
+/*********************************************************************
+ *
+ * Allocate DMA resources for RX buffers as well as memory for the RX
+ * mbuf map, direct RX cluster pointer map and RX cluster bus address
+ * map. RX DMA map, RX mbuf map, direct RX cluster pointer map and
+ * RX cluster map are kept in a iflib_sw_rx_desc_array structure.
+ * Since we use use one entry in iflib_sw_rx_desc_array per received
+ * packet, the maximum number of entries we'll need is equal to the
+ * number of hardware receive descriptors that we've allocated.
+ *
+ **********************************************************************/
+static int
+iflib_rxsd_alloc(iflib_rxq_t rxq)
+{
+ if_ctx_t ctx = rxq->ifr_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ device_t dev = ctx->ifc_dev;
+ iflib_fl_t fl;
+ int err;
+
+ MPASS(scctx->isc_nrxd[0] > 0);
+ MPASS(scctx->isc_nrxd[rxq->ifr_fl_offset] > 0);
+
+ fl = rxq->ifr_fl;
+ for (int i = 0; i < rxq->ifr_nfl; i++, fl++) {
+ fl->ifl_size = scctx->isc_nrxd[rxq->ifr_fl_offset]; /* this isn't necessarily the same */
+ /* Set up DMA tag for RX buffers. */
+ err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
+ 1, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ sctx->isc_rx_maxsize, /* maxsize */
+ sctx->isc_rx_nsegments, /* nsegments */
+ sctx->isc_rx_maxsegsize, /* maxsegsize */
+ 0, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockarg */
+ &fl->ifl_buf_tag);
+ if (err) {
+ device_printf(dev,
+ "Unable to allocate RX DMA tag: %d\n", err);
+ goto fail;
+ }
+
+ /* Allocate memory for the RX mbuf map. */
+ if (!(fl->ifl_sds.ifsd_m =
+ (struct mbuf **) malloc(sizeof(struct mbuf *) *
+ scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev,
+ "Unable to allocate RX mbuf map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /* Allocate memory for the direct RX cluster pointer map. */
+ if (!(fl->ifl_sds.ifsd_cl =
+ (caddr_t *) malloc(sizeof(caddr_t) *
+ scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev,
+ "Unable to allocate RX cluster map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /* Allocate memory for the RX cluster bus address map. */
+ if (!(fl->ifl_sds.ifsd_ba =
+ (bus_addr_t *) malloc(sizeof(bus_addr_t) *
+ scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev,
+ "Unable to allocate RX bus address map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /*
+ * Create the DMA maps for RX buffers.
+ */
+ if (!(fl->ifl_sds.ifsd_map =
+ (bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev,
+ "Unable to allocate RX buffer DMA map memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+ for (int i = 0; i < scctx->isc_nrxd[rxq->ifr_fl_offset]; i++) {
+ err = bus_dmamap_create(fl->ifl_buf_tag, 0,
+ &fl->ifl_sds.ifsd_map[i]);
+ if (err != 0) {
+ device_printf(dev, "Unable to create RX buffer DMA map\n");
+ goto fail;
+ }
+ }
+ }
+ return (0);
+
+fail:
+ iflib_rx_structures_free(ctx);
+ return (err);
+}
+
+
+/*
+ * Internal service routines
+ */
+
+struct rxq_refill_cb_arg {
+ int error;
+ bus_dma_segment_t seg;
+ int nseg;
+};
+
+static void
+_rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+ struct rxq_refill_cb_arg *cb_arg = arg;
+
+ cb_arg->error = error;
+ cb_arg->seg = segs[0];
+ cb_arg->nseg = nseg;
+}
+
+/**
+ * _iflib_fl_refill - refill an rxq free-buffer list
+ * @ctx: the iflib context
+ * @fl: the free list to refill
+ * @count: the number of new buffers to allocate
+ *
+ * (Re)populate an rxq free-buffer list with up to @count new packet buffers.
+ * The caller must assure that @count does not exceed the queue's capacity.
+ */
+static void
+_iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count)
+{
+ struct if_rxd_update iru;
+ struct rxq_refill_cb_arg cb_arg;
+ struct mbuf *m;
+ caddr_t cl, *sd_cl;
+ struct mbuf **sd_m;
+ bus_dmamap_t *sd_map;
+ bus_addr_t bus_addr, *sd_ba;
+ int err, frag_idx, i, idx, n, pidx;
+ qidx_t credits;
+
+ sd_m = fl->ifl_sds.ifsd_m;
+ sd_map = fl->ifl_sds.ifsd_map;
+ sd_cl = fl->ifl_sds.ifsd_cl;
+ sd_ba = fl->ifl_sds.ifsd_ba;
+ pidx = fl->ifl_pidx;
+ idx = pidx;
+ frag_idx = fl->ifl_fragidx;
+ credits = fl->ifl_credits;
+
+ i = 0;
+ n = count;
+ MPASS(n > 0);
+ MPASS(credits + n <= fl->ifl_size);
+
+ if (pidx < fl->ifl_cidx)
+ MPASS(pidx + n <= fl->ifl_cidx);
+ if (pidx == fl->ifl_cidx && (credits < fl->ifl_size))
+ MPASS(fl->ifl_gen == 0);
+ if (pidx > fl->ifl_cidx)
+ MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx);
+
+ DBG_COUNTER_INC(fl_refills);
+ if (n > 8)
+ DBG_COUNTER_INC(fl_refills_large);
+ iru_init(&iru, fl->ifl_rxq, fl->ifl_id);
+ while (n--) {
+ /*
+ * We allocate an uninitialized mbuf + cluster, mbuf is
+ * initialized after rx.
+ *
+ * If the cluster is still set then we know a minimum sized packet was received
+ */
+ bit_ffc_at(fl->ifl_rx_bitmap, frag_idx, fl->ifl_size,
+ &frag_idx);
+ if (frag_idx < 0)
+ bit_ffc(fl->ifl_rx_bitmap, fl->ifl_size, &frag_idx);
+ MPASS(frag_idx >= 0);
+ if ((cl = sd_cl[frag_idx]) == NULL) {
+ if ((cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL)
+ break;
+
+ cb_arg.error = 0;
+ MPASS(sd_map != NULL);
+ err = bus_dmamap_load(fl->ifl_buf_tag, sd_map[frag_idx],
+ cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg,
+ BUS_DMA_NOWAIT);
+ if (err != 0 || cb_arg.error) {
+ /*
+ * !zone_pack ?
+ */
+ if (fl->ifl_zone == zone_pack)
+ uma_zfree(fl->ifl_zone, cl);
+ break;
+ }
+
+ sd_ba[frag_idx] = bus_addr = cb_arg.seg.ds_addr;
+ sd_cl[frag_idx] = cl;
+#if MEMORY_LOGGING
+ fl->ifl_cl_enqueued++;
+#endif
+ } else {
+ bus_addr = sd_ba[frag_idx];
+ }
+ bus_dmamap_sync(fl->ifl_buf_tag, sd_map[frag_idx],
+ BUS_DMASYNC_PREREAD);
+
+ MPASS(sd_m[frag_idx] == NULL);
+ if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) {
+ break;
+ }
+ sd_m[frag_idx] = m;
+ bit_set(fl->ifl_rx_bitmap, frag_idx);
+#if MEMORY_LOGGING
+ fl->ifl_m_enqueued++;
+#endif
+
+ DBG_COUNTER_INC(rx_allocs);
+ fl->ifl_rxd_idxs[i] = frag_idx;
+ fl->ifl_bus_addrs[i] = bus_addr;
+ fl->ifl_vm_addrs[i] = cl;
+ credits++;
+ i++;
+ MPASS(credits <= fl->ifl_size);
+ if (++idx == fl->ifl_size) {
+ fl->ifl_gen = 1;
+ idx = 0;
+ }
+ if (n == 0 || i == IFLIB_MAX_RX_REFRESH) {
+ iru.iru_pidx = pidx;
+ iru.iru_count = i;
+ ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
+ i = 0;
+ pidx = idx;
+ fl->ifl_pidx = idx;
+ fl->ifl_credits = credits;
+ }
+ }
+
+ if (i) {
+ iru.iru_pidx = pidx;
+ iru.iru_count = i;
+ ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
+ fl->ifl_pidx = idx;
+ fl->ifl_credits = credits;
+ }
+ DBG_COUNTER_INC(rxd_flush);
+ if (fl->ifl_pidx == 0)
+ pidx = fl->ifl_size - 1;
+ else
+ pidx = fl->ifl_pidx - 1;
+
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx);
+ fl->ifl_fragidx = frag_idx;
+}
+
+static __inline void
+__iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max)
+{
+ /* we avoid allowing pidx to catch up with cidx as it confuses ixl */
+ int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1;
+#ifdef INVARIANTS
+ int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1;
+#endif
+
+ MPASS(fl->ifl_credits <= fl->ifl_size);
+ MPASS(reclaimable == delta);
+
+ if (reclaimable > 0)
+ _iflib_fl_refill(ctx, fl, min(max, reclaimable));
+}
+
+uint8_t
+iflib_in_detach(if_ctx_t ctx)
+{
+ bool in_detach;
+
+ STATE_LOCK(ctx);
+ in_detach = !!(ctx->ifc_flags & IFC_IN_DETACH);
+ STATE_UNLOCK(ctx);
+ return (in_detach);
+}
+
+static void
+iflib_fl_bufs_free(iflib_fl_t fl)
+{
+ iflib_dma_info_t idi = fl->ifl_ifdi;
+ bus_dmamap_t sd_map;
+ uint32_t i;
+
+ for (i = 0; i < fl->ifl_size; i++) {
+ struct mbuf **sd_m = &fl->ifl_sds.ifsd_m[i];
+ caddr_t *sd_cl = &fl->ifl_sds.ifsd_cl[i];
+
+ if (*sd_cl != NULL) {
+ sd_map = fl->ifl_sds.ifsd_map[i];
+ bus_dmamap_sync(fl->ifl_buf_tag, sd_map,
+ BUS_DMASYNC_POSTREAD);
+ bus_dmamap_unload(fl->ifl_buf_tag, sd_map);
+ if (*sd_cl != NULL)
+ uma_zfree(fl->ifl_zone, *sd_cl);
+ // XXX: Should this get moved out?
+ if (iflib_in_detach(fl->ifl_rxq->ifr_ctx))
+ bus_dmamap_destroy(fl->ifl_buf_tag, sd_map);
+ if (*sd_m != NULL) {
+ m_init(*sd_m, M_NOWAIT, MT_DATA, 0);
+ uma_zfree(zone_mbuf, *sd_m);
+ }
+ } else {
+ MPASS(*sd_cl == NULL);
+ MPASS(*sd_m == NULL);
+ }
+#if MEMORY_LOGGING
+ fl->ifl_m_dequeued++;
+ fl->ifl_cl_dequeued++;
+#endif
+ *sd_cl = NULL;
+ *sd_m = NULL;
+ }
+#ifdef INVARIANTS
+ for (i = 0; i < fl->ifl_size; i++) {
+ MPASS(fl->ifl_sds.ifsd_cl[i] == NULL);
+ MPASS(fl->ifl_sds.ifsd_m[i] == NULL);
+ }
+#endif
+ /*
+ * Reset free list values
+ */
+ fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = fl->ifl_fragidx = 0;
+ bzero(idi->idi_vaddr, idi->idi_size);
+}
+
+/*********************************************************************
+ *
+ * Initialize a free list and its buffers.
+ *
+ **********************************************************************/
+static int
+iflib_fl_setup(iflib_fl_t fl)
+{
+ iflib_rxq_t rxq = fl->ifl_rxq;
+ if_ctx_t ctx = rxq->ifr_ctx;
+
+ bit_nclear(fl->ifl_rx_bitmap, 0, fl->ifl_size - 1);
+ /*
+ ** Free current RX buffer structs and their mbufs
+ */
+ iflib_fl_bufs_free(fl);
+ /* Now replenish the mbufs */
+ MPASS(fl->ifl_credits == 0);
+ fl->ifl_buf_size = ctx->ifc_rx_mbuf_sz;
+ if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size)
+ ctx->ifc_max_fl_buf_size = fl->ifl_buf_size;
+ fl->ifl_cltype = m_gettype(fl->ifl_buf_size);
+ fl->ifl_zone = m_getzone(fl->ifl_buf_size);
+
+
+ /* avoid pre-allocating zillions of clusters to an idle card
+ * potentially speeding up attach
+ */
+ _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size));
+ MPASS(min(128, fl->ifl_size) == fl->ifl_credits);
+ if (min(128, fl->ifl_size) != fl->ifl_credits)
+ return (ENOBUFS);
+ /*
+ * handle failure
+ */
+ MPASS(rxq != NULL);
+ MPASS(fl->ifl_ifdi != NULL);
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ return (0);
+}
+
+/*********************************************************************
+ *
+ * Free receive ring data structures
+ *
+ **********************************************************************/
+static void
+iflib_rx_sds_free(iflib_rxq_t rxq)
+{
+ iflib_fl_t fl;
+ int i, j;
+
+ if (rxq->ifr_fl != NULL) {
+ for (i = 0; i < rxq->ifr_nfl; i++) {
+ fl = &rxq->ifr_fl[i];
+ if (fl->ifl_buf_tag != NULL) {
+ if (fl->ifl_sds.ifsd_map != NULL) {
+ for (j = 0; j < fl->ifl_size; j++) {
+ if (fl->ifl_sds.ifsd_map[j] ==
+ NULL)
+ continue;
+ bus_dmamap_sync(
+ fl->ifl_buf_tag,
+ fl->ifl_sds.ifsd_map[j],
+ BUS_DMASYNC_POSTREAD);
+ bus_dmamap_unload(
+ fl->ifl_buf_tag,
+ fl->ifl_sds.ifsd_map[j]);
+ }
+ }
+ bus_dma_tag_destroy(fl->ifl_buf_tag);
+ fl->ifl_buf_tag = NULL;
+ }
+ free(fl->ifl_sds.ifsd_m, M_IFLIB);
+ free(fl->ifl_sds.ifsd_cl, M_IFLIB);
+ free(fl->ifl_sds.ifsd_ba, M_IFLIB);
+ free(fl->ifl_sds.ifsd_map, M_IFLIB);
+ fl->ifl_sds.ifsd_m = NULL;
+ fl->ifl_sds.ifsd_cl = NULL;
+ fl->ifl_sds.ifsd_ba = NULL;
+ fl->ifl_sds.ifsd_map = NULL;
+ }
+ free(rxq->ifr_fl, M_IFLIB);
+ rxq->ifr_fl = NULL;
+ rxq->ifr_cq_cidx = 0;
+ }
+}
+
+/*
+ * Timer routine
+ */
+static void
+iflib_timer(void *arg)
+{
+ iflib_txq_t txq = arg;
+ if_ctx_t ctx = txq->ift_ctx;
+ if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
+ uint64_t this_tick = ticks;
+ uint32_t reset_on = hz / 2;
+
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+
+ /*
+ ** Check on the state of the TX queue(s), this
+ ** can be done without the lock because its RO
+ ** and the HUNG state will be static if set.
+ */
+ if (this_tick - txq->ift_last_timer_tick >= hz / 2) {
+ txq->ift_last_timer_tick = this_tick;
+ IFDI_TIMER(ctx, txq->ift_id);
+ if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) &&
+ ((txq->ift_cleaned_prev == txq->ift_cleaned) ||
+ (sctx->isc_pause_frames == 0)))
+ goto hung;
+
+ if (ifmp_ring_is_stalled(txq->ift_br))
+ txq->ift_qstatus = IFLIB_QUEUE_HUNG;
+ txq->ift_cleaned_prev = txq->ift_cleaned;
+ }
+#ifdef DEV_NETMAP
+ if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP)
+ iflib_netmap_timer_adjust(ctx, txq, &reset_on);
+#endif
+ /* handle any laggards */
+ if (txq->ift_db_pending)
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+
+ sctx->isc_pause_frames = 0;
+ if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)
+ callout_reset_on(&txq->ift_timer, reset_on, iflib_timer, txq, txq->ift_timer.c_cpu);
+ return;
+
+ hung:
+ device_printf(ctx->ifc_dev,
+ "Watchdog timeout (TX: %d desc avail: %d pidx: %d) -- resetting\n",
+ txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx);
+ STATE_LOCK(ctx);
+ if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
+ ctx->ifc_flags |= (IFC_DO_WATCHDOG|IFC_DO_RESET);
+ iflib_admin_intr_deferred(ctx);
+ STATE_UNLOCK(ctx);
+}
+
+static void
+iflib_calc_rx_mbuf_sz(if_ctx_t ctx)
+{
+ if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
+
+ /*
+ * XXX don't set the max_frame_size to larger
+ * than the hardware can handle
+ */
+ if (sctx->isc_max_frame_size <= MCLBYTES)
+ ctx->ifc_rx_mbuf_sz = MCLBYTES;
+ else
+ ctx->ifc_rx_mbuf_sz = MJUMPAGESIZE;
+}
+
+uint32_t
+iflib_get_rx_mbuf_sz(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_rx_mbuf_sz);
+}
+
+static void
+iflib_init_locked(if_ctx_t ctx)
+{
+ if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ if_t ifp = ctx->ifc_ifp;
+ iflib_fl_t fl;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ int i, j, tx_ip_csum_flags, tx_ip6_csum_flags;
+
+ if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
+ IFDI_INTR_DISABLE(ctx);
+
+ tx_ip_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP);
+ tx_ip6_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_UDP | CSUM_IP6_SCTP);
+ /* Set hardware offload abilities */
+ if_clearhwassist(ifp);
+ if (if_getcapenable(ifp) & IFCAP_TXCSUM)
+ if_sethwassistbits(ifp, tx_ip_csum_flags, 0);
+ if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6)
+ if_sethwassistbits(ifp, tx_ip6_csum_flags, 0);
+ if (if_getcapenable(ifp) & IFCAP_TSO4)
+ if_sethwassistbits(ifp, CSUM_IP_TSO, 0);
+ if (if_getcapenable(ifp) & IFCAP_TSO6)
+ if_sethwassistbits(ifp, CSUM_IP6_TSO, 0);
+
+ for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) {
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ CALLOUT_UNLOCK(txq);
+ iflib_netmap_txq_init(ctx, txq);
+ }
+
+ /*
+ * Calculate a suitable Rx mbuf size prior to calling IFDI_INIT, so
+ * that drivers can use the value when setting up the hardware receive
+ * buffers.
+ */
+ iflib_calc_rx_mbuf_sz(ctx);
+
+#ifdef INVARIANTS
+ i = if_getdrvflags(ifp);
+#endif
+ IFDI_INIT(ctx);
+ MPASS(if_getdrvflags(ifp) == i);
+ for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) {
+ /* XXX this should really be done on a per-queue basis */
+ if (if_getcapenable(ifp) & IFCAP_NETMAP) {
+ MPASS(rxq->ifr_id == i);
+ iflib_netmap_rxq_init(ctx, rxq);
+ continue;
+ }
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
+ if (iflib_fl_setup(fl)) {
+ device_printf(ctx->ifc_dev,
+ "setting up free list %d failed - "
+ "check cluster settings\n", j);
+ goto done;
+ }
+ }
+ }
+done:
+ if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
+ IFDI_INTR_ENABLE(ctx);
+ txq = ctx->ifc_txqs;
+ for (i = 0; i < sctx->isc_ntxqsets; i++, txq++)
+ callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq,
+ txq->ift_timer.c_cpu);
+}
+
+static int
+iflib_media_change(if_t ifp)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+ int err;
+
+ CTX_LOCK(ctx);
+ if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0)
+ iflib_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+ return (err);
+}
+
+static void
+iflib_media_status(if_t ifp, struct ifmediareq *ifmr)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ CTX_LOCK(ctx);
+ IFDI_UPDATE_ADMIN_STATUS(ctx);
+ IFDI_MEDIA_STATUS(ctx, ifmr);
+ CTX_UNLOCK(ctx);
+}
+
+void
+iflib_stop(if_ctx_t ctx)
+{
+ iflib_txq_t txq = ctx->ifc_txqs;
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ iflib_dma_info_t di;
+ iflib_fl_t fl;
+ int i, j;
+
+ /* Tell the stack that the interface is no longer active */
+ if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
+
+ IFDI_INTR_DISABLE(ctx);
+ DELAY(1000);
+ IFDI_STOP(ctx);
+ DELAY(1000);
+
+ iflib_debug_reset();
+ /* Wait for current tx queue users to exit to disarm watchdog timer. */
+ for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) {
+ /* make sure all transmitters have completed before proceeding XXX */
+
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ CALLOUT_UNLOCK(txq);
+
+ /* clean any enqueued buffers */
+ iflib_ifmp_purge(txq);
+ /* Free any existing tx buffers. */
+ for (j = 0; j < txq->ift_size; j++) {
+ iflib_txsd_free(ctx, txq, j);
+ }
+ txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0;
+ txq->ift_in_use = txq->ift_gen = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0;
+ txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0;
+ txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0;
+ txq->ift_pullups = 0;
+ ifmp_ring_reset_stats(txq->ift_br);
+ for (j = 0, di = txq->ift_ifdi; j < sctx->isc_ntxqs; j++, di++)
+ bzero((void *)di->idi_vaddr, di->idi_size);
+ }
+ for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) {
+ /* make sure all transmitters have completed before proceeding XXX */
+
+ rxq->ifr_cq_cidx = 0;
+ for (j = 0, di = rxq->ifr_ifdi; j < sctx->isc_nrxqs; j++, di++)
+ bzero((void *)di->idi_vaddr, di->idi_size);
+ /* also resets the free lists pidx/cidx */
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
+ iflib_fl_bufs_free(fl);
+ }
+}
+
+static inline caddr_t
+calc_next_rxd(iflib_fl_t fl, int cidx)
+{
+ qidx_t size;
+ int nrxd;
+ caddr_t start, end, cur, next;
+
+ nrxd = fl->ifl_size;
+ size = fl->ifl_rxd_size;
+ start = fl->ifl_ifdi->idi_vaddr;
+
+ if (__predict_false(size == 0))
+ return (start);
+ cur = start + size*cidx;
+ end = start + size*nrxd;
+ next = CACHE_PTR_NEXT(cur);
+ return (next < end ? next : start);
+}
+
+static inline void
+prefetch_pkts(iflib_fl_t fl, int cidx)
+{
+ int nextptr;
+ int nrxd = fl->ifl_size;
+ caddr_t next_rxd;
+
+
+ nextptr = (cidx + CACHE_PTR_INCREMENT) & (nrxd-1);
+ prefetch(&fl->ifl_sds.ifsd_m[nextptr]);
+ prefetch(&fl->ifl_sds.ifsd_cl[nextptr]);
+ next_rxd = calc_next_rxd(fl, cidx);
+ prefetch(next_rxd);
+ prefetch(fl->ifl_sds.ifsd_m[(cidx + 1) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_m[(cidx + 2) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_m[(cidx + 3) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_m[(cidx + 4) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_cl[(cidx + 1) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_cl[(cidx + 2) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_cl[(cidx + 3) & (nrxd-1)]);
+ prefetch(fl->ifl_sds.ifsd_cl[(cidx + 4) & (nrxd-1)]);
+}
+
+static void
+rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, int unload, if_rxsd_t sd)
+{
+ int flid, cidx;
+ bus_dmamap_t map;
+ iflib_fl_t fl;
+ int next;
+
+ map = NULL;
+ flid = irf->irf_flid;
+ cidx = irf->irf_idx;
+ fl = &rxq->ifr_fl[flid];
+ sd->ifsd_fl = fl;
+ sd->ifsd_cidx = cidx;
+ sd->ifsd_m = &fl->ifl_sds.ifsd_m[cidx];
+ sd->ifsd_cl = &fl->ifl_sds.ifsd_cl[cidx];
+ fl->ifl_credits--;
+#if MEMORY_LOGGING
+ fl->ifl_m_dequeued++;
+#endif
+ if (rxq->ifr_ctx->ifc_flags & IFC_PREFETCH)
+ prefetch_pkts(fl, cidx);
+ next = (cidx + CACHE_PTR_INCREMENT) & (fl->ifl_size-1);
+ prefetch(&fl->ifl_sds.ifsd_map[next]);
+ map = fl->ifl_sds.ifsd_map[cidx];
+ next = (cidx + CACHE_LINE_SIZE) & (fl->ifl_size-1);
+
+ /* not valid assert if bxe really does SGE from non-contiguous elements */
+ MPASS(fl->ifl_cidx == cidx);
+ bus_dmamap_sync(fl->ifl_buf_tag, map, BUS_DMASYNC_POSTREAD);
+ if (unload)
+ bus_dmamap_unload(fl->ifl_buf_tag, map);
+ fl->ifl_cidx = (fl->ifl_cidx + 1) & (fl->ifl_size-1);
+ if (__predict_false(fl->ifl_cidx == 0))
+ fl->ifl_gen = 0;
+ bit_clear(fl->ifl_rx_bitmap, cidx);
+}
+
+static struct mbuf *
+assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri, if_rxsd_t sd)
+{
+ int i, padlen , flags;
+ struct mbuf *m, *mh, *mt;
+ caddr_t cl;
+
+ i = 0;
+ mh = NULL;
+ do {
+ rxd_frag_to_sd(rxq, &ri->iri_frags[i], TRUE, sd);
+
+ MPASS(*sd->ifsd_cl != NULL);
+ MPASS(*sd->ifsd_m != NULL);
+
+ /* Don't include zero-length frags */
+ if (ri->iri_frags[i].irf_len == 0) {
+ /* XXX we can save the cluster here, but not the mbuf */
+ m_init(*sd->ifsd_m, M_NOWAIT, MT_DATA, 0);
+ m_free(*sd->ifsd_m);
+ *sd->ifsd_m = NULL;
+ continue;
+ }
+ m = *sd->ifsd_m;
+ *sd->ifsd_m = NULL;
+ if (mh == NULL) {
+ flags = M_PKTHDR|M_EXT;
+ mh = mt = m;
+ padlen = ri->iri_pad;
+ } else {
+ flags = M_EXT;
+ mt->m_next = m;
+ mt = m;
+ /* assuming padding is only on the first fragment */
+ padlen = 0;
+ }
+ cl = *sd->ifsd_cl;
+ *sd->ifsd_cl = NULL;
+
+ /* Can these two be made one ? */
+ m_init(m, M_NOWAIT, MT_DATA, flags);
+ m_cljset(m, cl, sd->ifsd_fl->ifl_cltype);
+ /*
+ * These must follow m_init and m_cljset
+ */
+ m->m_data += padlen;
+ ri->iri_len -= padlen;
+ m->m_len = ri->iri_frags[i].irf_len;
+ } while (++i < ri->iri_nfrags);
+
+ return (mh);
+}
+
+/*
+ * Process one software descriptor
+ */
+static struct mbuf *
+iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri)
+{
+ struct if_rxsd sd;
+ struct mbuf *m;
+
+ /* should I merge this back in now that the two paths are basically duplicated? */
+ if (ri->iri_nfrags == 1 &&
+ ri->iri_frags[0].irf_len <= MIN(IFLIB_RX_COPY_THRESH, MHLEN)) {
+ rxd_frag_to_sd(rxq, &ri->iri_frags[0], FALSE, &sd);
+ m = *sd.ifsd_m;
+ *sd.ifsd_m = NULL;
+ m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR);
+#ifndef __NO_STRICT_ALIGNMENT
+ if (!IP_ALIGNED(m))
+ m->m_data += 2;
+#endif
+ memcpy(m->m_data, *sd.ifsd_cl, ri->iri_len);
+ m->m_len = ri->iri_frags[0].irf_len;
+ } else {
+ m = assemble_segments(rxq, ri, &sd);
+ }
+ m->m_pkthdr.len = ri->iri_len;
+ m->m_pkthdr.rcvif = ri->iri_ifp;
+ m->m_flags |= ri->iri_flags;
+ m->m_pkthdr.ether_vtag = ri->iri_vtag;
+ m->m_pkthdr.flowid = ri->iri_flowid;
+ M_HASHTYPE_SET(m, ri->iri_rsstype);
+ m->m_pkthdr.csum_flags = ri->iri_csum_flags;
+ m->m_pkthdr.csum_data = ri->iri_csum_data;
+ return (m);
+}
+
+#if defined(INET6) || defined(INET)
+static void
+iflib_get_ip_forwarding(struct lro_ctrl *lc, bool *v4, bool *v6)
+{
+ CURVNET_SET(lc->ifp->if_vnet);
+#if defined(INET6)
+ *v6 = VNET(ip6_forwarding);
+#endif
+#if defined(INET)
+ *v4 = VNET(ipforwarding);
+#endif
+ CURVNET_RESTORE();
+}
+
+/*
+ * Returns true if it's possible this packet could be LROed.
+ * if it returns false, it is guaranteed that tcp_lro_rx()
+ * would not return zero.
+ */
+static bool
+iflib_check_lro_possible(struct mbuf *m, bool v4_forwarding, bool v6_forwarding)
+{
+ struct ether_header *eh;
+ uint16_t eh_type;
+
+ eh = mtod(m, struct ether_header *);
+ eh_type = ntohs(eh->ether_type);
+ switch (eh_type) {
+#if defined(INET6)
+ case ETHERTYPE_IPV6:
+ return !v6_forwarding;
+#endif
+#if defined (INET)
+ case ETHERTYPE_IP:
+ return !v4_forwarding;
+#endif
+ }
+
+ return false;
+}
+#else
+static void
+iflib_get_ip_forwarding(struct lro_ctrl *lc __unused, bool *v4 __unused, bool *v6 __unused)
+{
+}
+#endif
+
+static bool
+iflib_rxeof(iflib_rxq_t rxq, qidx_t budget)
+{
+ if_t ifp;
+ if_ctx_t ctx = rxq->ifr_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ int avail, i;
+ qidx_t *cidxp;
+ struct if_rxd_info ri;
+ int err, budget_left, rx_bytes, rx_pkts;
+ iflib_fl_t fl;
+ int lro_enabled;
+ bool v4_forwarding, v6_forwarding, lro_possible;
+
+ /*
+ * XXX early demux data packets so that if_input processing only handles
+ * acks in interrupt context
+ */
+ struct mbuf *m, *mh, *mt, *mf;
+
+ lro_possible = v4_forwarding = v6_forwarding = false;
+ ifp = ctx->ifc_ifp;
+ mh = mt = NULL;
+ MPASS(budget > 0);
+ rx_pkts = rx_bytes = 0;
+ if (sctx->isc_flags & IFLIB_HAS_RXCQ)
+ cidxp = &rxq->ifr_cq_cidx;
+ else
+ cidxp = &rxq->ifr_fl[0].ifl_cidx;
+ if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget)) == 0) {
+ for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
+ __iflib_fl_refill_lt(ctx, fl, budget + 8);
+ DBG_COUNTER_INC(rx_unavail);
+ return (false);
+ }
+
+ for (budget_left = budget; budget_left > 0 && avail > 0;) {
+ if (__predict_false(!CTX_ACTIVE(ctx))) {
+ DBG_COUNTER_INC(rx_ctx_inactive);
+ break;
+ }
+ /*
+ * Reset client set fields to their default values
+ */
+ rxd_info_zero(&ri);
+ ri.iri_qsidx = rxq->ifr_id;
+ ri.iri_cidx = *cidxp;
+ ri.iri_ifp = ifp;
+ ri.iri_frags = rxq->ifr_frags;
+ err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
+
+ if (err)
+ goto err;
+ if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
+ *cidxp = ri.iri_cidx;
+ /* Update our consumer index */
+ /* XXX NB: shurd - check if this is still safe */
+ while (rxq->ifr_cq_cidx >= scctx->isc_nrxd[0])
+ rxq->ifr_cq_cidx -= scctx->isc_nrxd[0];
+ /* was this only a completion queue message? */
+ if (__predict_false(ri.iri_nfrags == 0))
+ continue;
+ }
+ MPASS(ri.iri_nfrags != 0);
+ MPASS(ri.iri_len != 0);
+
+ /* will advance the cidx on the corresponding free lists */
+ m = iflib_rxd_pkt_get(rxq, &ri);
+ avail--;
+ budget_left--;
+ if (avail == 0 && budget_left)
+ avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget_left);
+
+ if (__predict_false(m == NULL)) {
+ DBG_COUNTER_INC(rx_mbuf_null);
+ continue;
+ }
+ /* imm_pkt: -- cxgb */
+ if (mh == NULL)
+ mh = mt = m;
+ else {
+ mt->m_nextpkt = m;
+ mt = m;
+ }
+ }
+ /* make sure that we can refill faster than drain */
+ for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
+ __iflib_fl_refill_lt(ctx, fl, budget + 8);
+
+ lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO);
+ if (lro_enabled)
+ iflib_get_ip_forwarding(&rxq->ifr_lc, &v4_forwarding, &v6_forwarding);
+ mt = mf = NULL;
+ while (mh != NULL) {
+ m = mh;
+ mh = mh->m_nextpkt;
+ m->m_nextpkt = NULL;
+#ifndef __NO_STRICT_ALIGNMENT
+ if (!IP_ALIGNED(m) && (m = iflib_fixup_rx(m)) == NULL)
+ continue;
+#endif
+ rx_bytes += m->m_pkthdr.len;
+ rx_pkts++;
+#if defined(INET6) || defined(INET)
+ if (lro_enabled) {
+ if (!lro_possible) {
+ lro_possible = iflib_check_lro_possible(m, v4_forwarding, v6_forwarding);
+ if (lro_possible && mf != NULL) {
+ ifp->if_input(ifp, mf);
+ DBG_COUNTER_INC(rx_if_input);
+ mt = mf = NULL;
+ }
+ }
+ if ((m->m_pkthdr.csum_flags & (CSUM_L4_CALC|CSUM_L4_VALID)) ==
+ (CSUM_L4_CALC|CSUM_L4_VALID)) {
+ if (lro_possible && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0)
+ continue;
+ }
+ }
+#endif
+ if (lro_possible) {
+ ifp->if_input(ifp, m);
+ DBG_COUNTER_INC(rx_if_input);
+ continue;
+ }
+
+ if (mf == NULL)
+ mf = m;
+ if (mt != NULL)
+ mt->m_nextpkt = m;
+ mt = m;
+ }
+ if (mf != NULL) {
+ ifp->if_input(ifp, mf);
+ DBG_COUNTER_INC(rx_if_input);
+ }
+
+ if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes);
+ if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts);
+
+ /*
+ * Flush any outstanding LRO work
+ */
+#if defined(INET6) || defined(INET)
+ tcp_lro_flush_all(&rxq->ifr_lc);
+#endif
+ if (avail)
+ return true;
+ return (iflib_rxd_avail(ctx, rxq, *cidxp, 1));
+err:
+ STATE_LOCK(ctx);
+ ctx->ifc_flags |= IFC_DO_RESET;
+ iflib_admin_intr_deferred(ctx);
+ STATE_UNLOCK(ctx);
+ return (false);
+}
+
+#define TXD_NOTIFY_COUNT(txq) (((txq)->ift_size / (txq)->ift_update_freq)-1)
+static inline qidx_t
+txq_max_db_deferred(iflib_txq_t txq, qidx_t in_use)
+{
+ qidx_t notify_count = TXD_NOTIFY_COUNT(txq);
+ qidx_t minthresh = txq->ift_size / 8;
+ if (in_use > 4*minthresh)
+ return (notify_count);
+ if (in_use > 2*minthresh)
+ return (notify_count >> 1);
+ if (in_use > minthresh)
+ return (notify_count >> 3);
+ return (0);
+}
+
+static inline qidx_t
+txq_max_rs_deferred(iflib_txq_t txq)
+{
+ qidx_t notify_count = TXD_NOTIFY_COUNT(txq);
+ qidx_t minthresh = txq->ift_size / 8;
+ if (txq->ift_in_use > 4*minthresh)
+ return (notify_count);
+ if (txq->ift_in_use > 2*minthresh)
+ return (notify_count >> 1);
+ if (txq->ift_in_use > minthresh)
+ return (notify_count >> 2);
+ return (2);
+}
+
+#define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags)
+#define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG)
+
+#define TXQ_MAX_DB_DEFERRED(txq, in_use) txq_max_db_deferred((txq), (in_use))
+#define TXQ_MAX_RS_DEFERRED(txq) txq_max_rs_deferred(txq)
+#define TXQ_MAX_DB_CONSUMED(size) (size >> 4)
+
+/* forward compatibility for cxgb */
+#define FIRST_QSET(ctx) 0
+#define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets)
+#define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets)
+#define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NTXQSETS(ctx)) + FIRST_QSET(ctx))
+#define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments))
+
+/* XXX we should be setting this to something other than zero */
+#define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh)
+#define MAX_TX_DESC(ctx) max((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max, \
+ (ctx)->ifc_softc_ctx.isc_tx_nsegments)
+
+static inline bool
+iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring, qidx_t in_use)
+{
+ qidx_t dbval, max;
+ bool rang;
+
+ rang = false;
+ max = TXQ_MAX_DB_DEFERRED(txq, in_use);
+ if (ring || txq->ift_db_pending >= max) {
+ dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx;
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval);
+ txq->ift_db_pending = txq->ift_npending = 0;
+ rang = true;
+ }
+ return (rang);
+}
+
+#ifdef PKT_DEBUG
+static void
+print_pkt(if_pkt_info_t pi)
+{
+ printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n",
+ pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx);
+ printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n",
+ pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag);
+ printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n",
+ pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto);
+}
+#endif
+
+#define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO)
+#define IS_TX_OFFLOAD4(pi) ((pi)->ipi_csum_flags & (CSUM_IP_TCP | CSUM_IP_TSO))
+#define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO)
+#define IS_TX_OFFLOAD6(pi) ((pi)->ipi_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_TSO))
+
+static int
+iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp)
+{
+ if_shared_ctx_t sctx = txq->ift_ctx->ifc_sctx;
+ struct ether_vlan_header *eh;
+ struct mbuf *m;
+
+ m = *mp;
+ if ((sctx->isc_flags & IFLIB_NEED_SCRATCH) &&
+ M_WRITABLE(m) == 0) {
+ if ((m = m_dup(m, M_NOWAIT)) == NULL) {
+ return (ENOMEM);
+ } else {
+ m_freem(*mp);
+ DBG_COUNTER_INC(tx_frees);
+ *mp = m;
+ }
+ }
+
+ /*
+ * Determine where frame payload starts.
+ * Jump over vlan headers if already present,
+ * helpful for QinQ too.
+ */
+ if (__predict_false(m->m_len < sizeof(*eh))) {
+ txq->ift_pullups++;
+ if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL))
+ return (ENOMEM);
+ }
+ eh = mtod(m, struct ether_vlan_header *);
+ if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
+ pi->ipi_etype = ntohs(eh->evl_proto);
+ pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
+ } else {
+ pi->ipi_etype = ntohs(eh->evl_encap_proto);
+ pi->ipi_ehdrlen = ETHER_HDR_LEN;
+ }
+
+ switch (pi->ipi_etype) {
+#ifdef INET
+ case ETHERTYPE_IP:
+ {
+ struct mbuf *n;
+ struct ip *ip = NULL;
+ struct tcphdr *th = NULL;
+ int minthlen;
+
+ minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th));
+ if (__predict_false(m->m_len < minthlen)) {
+ /*
+ * if this code bloat is causing too much of a hit
+ * move it to a separate function and mark it noinline
+ */
+ if (m->m_len == pi->ipi_ehdrlen) {
+ n = m->m_next;
+ MPASS(n);
+ if (n->m_len >= sizeof(*ip)) {
+ ip = (struct ip *)n->m_data;
+ if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th))
+ th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
+ } else {
+ txq->ift_pullups++;
+ if (__predict_false((m = m_pullup(m, minthlen)) == NULL))
+ return (ENOMEM);
+ ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
+ }
+ } else {
+ txq->ift_pullups++;
+ if (__predict_false((m = m_pullup(m, minthlen)) == NULL))
+ return (ENOMEM);
+ ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
+ if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th))
+ th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
+ }
+ } else {
+ ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
+ if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th))
+ th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
+ }
+ pi->ipi_ip_hlen = ip->ip_hl << 2;
+ pi->ipi_ipproto = ip->ip_p;
+ pi->ipi_flags |= IPI_TX_IPV4;
+
+ /* TCP checksum offload may require TCP header length */
+ if (IS_TX_OFFLOAD4(pi)) {
+ if (__predict_true(pi->ipi_ipproto == IPPROTO_TCP)) {
+ if (__predict_false(th == NULL)) {
+ txq->ift_pullups++;
+ if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL))
+ return (ENOMEM);
+ th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen);
+ }
+ pi->ipi_tcp_hflags = th->th_flags;
+ pi->ipi_tcp_hlen = th->th_off << 2;
+ pi->ipi_tcp_seq = th->th_seq;
+ }
+ if (IS_TSO4(pi)) {
+ if (__predict_false(ip->ip_p != IPPROTO_TCP))
+ return (ENXIO);
+ /*
+ * TSO always requires hardware checksum offload.
+ */
+ pi->ipi_csum_flags |= (CSUM_IP_TCP | CSUM_IP);
+ th->th_sum = in_pseudo(ip->ip_src.s_addr,
+ ip->ip_dst.s_addr, htons(IPPROTO_TCP));
+ pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz;
+ if (sctx->isc_flags & IFLIB_TSO_INIT_IP) {
+ ip->ip_sum = 0;
+ ip->ip_len = htons(pi->ipi_ip_hlen + pi->ipi_tcp_hlen + pi->ipi_tso_segsz);
+ }
+ }
+ }
+ if ((sctx->isc_flags & IFLIB_NEED_ZERO_CSUM) && (pi->ipi_csum_flags & CSUM_IP))
+ ip->ip_sum = 0;
+
+ break;
+ }
+#endif
+#ifdef INET6
+ case ETHERTYPE_IPV6:
+ {
+ struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen);
+ struct tcphdr *th;
+ pi->ipi_ip_hlen = sizeof(struct ip6_hdr);
+
+ if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) {
+ txq->ift_pullups++;
+ if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL))
+ return (ENOMEM);
+ }
+ th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen);
+
+ /* XXX-BZ this will go badly in case of ext hdrs. */
+ pi->ipi_ipproto = ip6->ip6_nxt;
+ pi->ipi_flags |= IPI_TX_IPV6;
+
+ /* TCP checksum offload may require TCP header length */
+ if (IS_TX_OFFLOAD6(pi)) {
+ if (pi->ipi_ipproto == IPPROTO_TCP) {
+ if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) {
+ txq->ift_pullups++;
+ if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL))
+ return (ENOMEM);
+ }
+ pi->ipi_tcp_hflags = th->th_flags;
+ pi->ipi_tcp_hlen = th->th_off << 2;
+ pi->ipi_tcp_seq = th->th_seq;
+ }
+ if (IS_TSO6(pi)) {
+ if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP))
+ return (ENXIO);
+ /*
+ * TSO always requires hardware checksum offload.
+ */
+ pi->ipi_csum_flags |= CSUM_IP6_TCP;
+ th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);
+ pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz;
+ }
+ }
+ break;
+ }
+#endif
+ default:
+ pi->ipi_csum_flags &= ~CSUM_OFFLOAD;
+ pi->ipi_ip_hlen = 0;
+ break;
+ }
+ *mp = m;
+
+ return (0);
+}
+
+/*
+ * If dodgy hardware rejects the scatter gather chain we've handed it
+ * we'll need to remove the mbuf chain from ifsg_m[] before we can add the
+ * m_defrag'd mbufs
+ */
+static __noinline struct mbuf *
+iflib_remove_mbuf(iflib_txq_t txq)
+{
+ int ntxd, pidx;
+ struct mbuf *m, **ifsd_m;
+
+ ifsd_m = txq->ift_sds.ifsd_m;
+ ntxd = txq->ift_size;
+ pidx = txq->ift_pidx & (ntxd - 1);
+ ifsd_m = txq->ift_sds.ifsd_m;
+ m = ifsd_m[pidx];
+ ifsd_m[pidx] = NULL;
+ bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[pidx]);
+ if (txq->ift_sds.ifsd_tso_map != NULL)
+ bus_dmamap_unload(txq->ift_tso_buf_tag,
+ txq->ift_sds.ifsd_tso_map[pidx]);
+#if MEMORY_LOGGING
+ txq->ift_dequeued++;
+#endif
+ return (m);
+}
+
+static inline caddr_t
+calc_next_txd(iflib_txq_t txq, int cidx, uint8_t qid)
+{
+ qidx_t size;
+ int ntxd;
+ caddr_t start, end, cur, next;
+
+ ntxd = txq->ift_size;
+ size = txq->ift_txd_size[qid];
+ start = txq->ift_ifdi[qid].idi_vaddr;
+
+ if (__predict_false(size == 0))
+ return (start);
+ cur = start + size*cidx;
+ end = start + size*ntxd;
+ next = CACHE_PTR_NEXT(cur);
+ return (next < end ? next : start);
+}
+
+/*
+ * Pad an mbuf to ensure a minimum ethernet frame size.
+ * min_frame_size is the frame size (less CRC) to pad the mbuf to
+ */
+static __noinline int
+iflib_ether_pad(device_t dev, struct mbuf **m_head, uint16_t min_frame_size)
+{
+ /*
+ * 18 is enough bytes to pad an ARP packet to 46 bytes, and
+ * and ARP message is the smallest common payload I can think of
+ */
+ static char pad[18]; /* just zeros */
+ int n;
+ struct mbuf *new_head;
+
+ if (!M_WRITABLE(*m_head)) {
+ new_head = m_dup(*m_head, M_NOWAIT);
+ if (new_head == NULL) {
+ m_freem(*m_head);
+ device_printf(dev, "cannot pad short frame, m_dup() failed");
+ DBG_COUNTER_INC(encap_pad_mbuf_fail);
+ DBG_COUNTER_INC(tx_frees);
+ return ENOMEM;
+ }
+ m_freem(*m_head);
+ *m_head = new_head;
+ }
+
+ for (n = min_frame_size - (*m_head)->m_pkthdr.len;
+ n > 0; n -= sizeof(pad))
+ if (!m_append(*m_head, min(n, sizeof(pad)), pad))
+ break;
+
+ if (n > 0) {
+ m_freem(*m_head);
+ device_printf(dev, "cannot pad short frame\n");
+ DBG_COUNTER_INC(encap_pad_mbuf_fail);
+ DBG_COUNTER_INC(tx_frees);
+ return (ENOBUFS);
+ }
+
+ return 0;
+}
+
+static int
+iflib_encap(iflib_txq_t txq, struct mbuf **m_headp)
+{
+ if_ctx_t ctx;
+ if_shared_ctx_t sctx;
+ if_softc_ctx_t scctx;
+ bus_dma_tag_t buf_tag;
+ bus_dma_segment_t *segs;
+ struct mbuf *m_head, **ifsd_m;
+ void *next_txd;
+ bus_dmamap_t map;
+ struct if_pkt_info pi;
+ int remap = 0;
+ int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd;
+
+ ctx = txq->ift_ctx;
+ sctx = ctx->ifc_sctx;
+ scctx = &ctx->ifc_softc_ctx;
+ segs = txq->ift_segs;
+ ntxd = txq->ift_size;
+ m_head = *m_headp;
+ map = NULL;
+
+ /*
+ * If we're doing TSO the next descriptor to clean may be quite far ahead
+ */
+ cidx = txq->ift_cidx;
+ pidx = txq->ift_pidx;
+ if (ctx->ifc_flags & IFC_PREFETCH) {
+ next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1);
+ if (!(ctx->ifc_flags & IFLIB_HAS_TXCQ)) {
+ next_txd = calc_next_txd(txq, cidx, 0);
+ prefetch(next_txd);
+ }
+
+ /* prefetch the next cache line of mbuf pointers and flags */
+ prefetch(&txq->ift_sds.ifsd_m[next]);
+ prefetch(&txq->ift_sds.ifsd_map[next]);
+ next = (cidx + CACHE_LINE_SIZE) & (ntxd-1);
+ }
+ map = txq->ift_sds.ifsd_map[pidx];
+ ifsd_m = txq->ift_sds.ifsd_m;
+
+ if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
+ buf_tag = txq->ift_tso_buf_tag;
+ max_segs = scctx->isc_tx_tso_segments_max;
+ map = txq->ift_sds.ifsd_tso_map[pidx];
+ MPASS(buf_tag != NULL);
+ MPASS(max_segs > 0);
+ } else {
+ buf_tag = txq->ift_buf_tag;
+ max_segs = scctx->isc_tx_nsegments;
+ map = txq->ift_sds.ifsd_map[pidx];
+ }
+ if ((sctx->isc_flags & IFLIB_NEED_ETHER_PAD) &&
+ __predict_false(m_head->m_pkthdr.len < scctx->isc_min_frame_size)) {
+ err = iflib_ether_pad(ctx->ifc_dev, m_headp, scctx->isc_min_frame_size);
+ if (err) {
+ DBG_COUNTER_INC(encap_txd_encap_fail);
+ return err;
+ }
+ }
+ m_head = *m_headp;
+
+ pkt_info_zero(&pi);
+ pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST));
+ pi.ipi_pidx = pidx;
+ pi.ipi_qsidx = txq->ift_id;
+ pi.ipi_len = m_head->m_pkthdr.len;
+ pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags;
+ pi.ipi_vtag = M_HAS_VLANTAG(m_head) ? m_head->m_pkthdr.ether_vtag : 0;
+
+ /* deliberate bitwise OR to make one condition */
+ if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) {
+ if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0)) {
+ DBG_COUNTER_INC(encap_txd_encap_fail);
+ return (err);
+ }
+ m_head = *m_headp;
+ }
+
+retry:
+ err = bus_dmamap_load_mbuf_sg(buf_tag, map, m_head, segs, &nsegs,
+ BUS_DMA_NOWAIT);
+defrag:
+ if (__predict_false(err)) {
+ switch (err) {
+ case EFBIG:
+ /* try collapse once and defrag once */
+ if (remap == 0) {
+ m_head = m_collapse(*m_headp, M_NOWAIT, max_segs);
+ /* try defrag if collapsing fails */
+ if (m_head == NULL)
+ remap++;
+ }
+ if (remap == 1) {
+ txq->ift_mbuf_defrag++;
+ m_head = m_defrag(*m_headp, M_NOWAIT);
+ }
+ /*
+ * remap should never be >1 unless bus_dmamap_load_mbuf_sg
+ * failed to map an mbuf that was run through m_defrag
+ */
+ MPASS(remap <= 1);
+ if (__predict_false(m_head == NULL || remap > 1))
+ goto defrag_failed;
+ remap++;
+ *m_headp = m_head;
+ goto retry;
+ break;
+ case ENOMEM:
+ txq->ift_no_tx_dma_setup++;
+ break;
+ default:
+ txq->ift_no_tx_dma_setup++;
+ m_freem(*m_headp);
+ DBG_COUNTER_INC(tx_frees);
+ *m_headp = NULL;
+ break;
+ }
+ txq->ift_map_failed++;
+ DBG_COUNTER_INC(encap_load_mbuf_fail);
+ DBG_COUNTER_INC(encap_txd_encap_fail);
+ return (err);
+ }
+ ifsd_m[pidx] = m_head;
+ /*
+ * XXX assumes a 1 to 1 relationship between segments and
+ * descriptors - this does not hold true on all drivers, e.g.
+ * cxgb
+ */
+ if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) {
+ txq->ift_no_desc_avail++;
+ bus_dmamap_unload(buf_tag, map);
+ DBG_COUNTER_INC(encap_txq_avail_fail);
+ DBG_COUNTER_INC(encap_txd_encap_fail);
+ if ((txq->ift_task.gt_task.ta_flags & TASK_ENQUEUED) == 0)
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+ return (ENOBUFS);
+ }
+ /*
+ * On Intel cards we can greatly reduce the number of TX interrupts
+ * we see by only setting report status on every Nth descriptor.
+ * However, this also means that the driver will need to keep track
+ * of the descriptors that RS was set on to check them for the DD bit.
+ */
+ txq->ift_rs_pending += nsegs + 1;
+ if (txq->ift_rs_pending > TXQ_MAX_RS_DEFERRED(txq) ||
+ iflib_no_tx_batch || (TXQ_AVAIL(txq) - nsegs) <= MAX_TX_DESC(ctx) + 2) {
+ pi.ipi_flags |= IPI_TX_INTR;
+ txq->ift_rs_pending = 0;
+ }
+
+ pi.ipi_segs = segs;
+ pi.ipi_nsegs = nsegs;
+
+ MPASS(pidx >= 0 && pidx < txq->ift_size);
+#ifdef PKT_DEBUG
+ print_pkt(&pi);
+#endif
+ if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) {
+ bus_dmamap_sync(buf_tag, map, BUS_DMASYNC_PREWRITE);
+ DBG_COUNTER_INC(tx_encap);
+ MPASS(pi.ipi_new_pidx < txq->ift_size);
+
+ ndesc = pi.ipi_new_pidx - pi.ipi_pidx;
+ if (pi.ipi_new_pidx < pi.ipi_pidx) {
+ ndesc += txq->ift_size;
+ txq->ift_gen = 1;
+ }
+ /*
+ * drivers can need as many as
+ * two sentinels
+ */
+ MPASS(ndesc <= pi.ipi_nsegs + 2);
+ MPASS(pi.ipi_new_pidx != pidx);
+ MPASS(ndesc > 0);
+ txq->ift_in_use += ndesc;
+
+ /*
+ * We update the last software descriptor again here because there may
+ * be a sentinel and/or there may be more mbufs than segments
+ */
+ txq->ift_pidx = pi.ipi_new_pidx;
+ txq->ift_npending += pi.ipi_ndescs;
+ } else {
+ *m_headp = m_head = iflib_remove_mbuf(txq);
+ if (err == EFBIG) {
+ txq->ift_txd_encap_efbig++;
+ if (remap < 2) {
+ remap = 1;
+ goto defrag;
+ }
+ }
+ goto defrag_failed;
+ }
+ /*
+ * err can't possibly be non-zero here, so we don't neet to test it
+ * to see if we need to DBG_COUNTER_INC(encap_txd_encap_fail).
+ */
+ return (err);
+
+defrag_failed:
+ txq->ift_mbuf_defrag_failed++;
+ txq->ift_map_failed++;
+ m_freem(*m_headp);
+ DBG_COUNTER_INC(tx_frees);
+ *m_headp = NULL;
+ DBG_COUNTER_INC(encap_txd_encap_fail);
+ return (ENOMEM);
+}
+
+static void
+iflib_tx_desc_free(iflib_txq_t txq, int n)
+{
+ uint32_t qsize, cidx, mask, gen;
+ struct mbuf *m, **ifsd_m;
+ bool do_prefetch;
+
+ cidx = txq->ift_cidx;
+ gen = txq->ift_gen;
+ qsize = txq->ift_size;
+ mask = qsize-1;
+ ifsd_m = txq->ift_sds.ifsd_m;
+ do_prefetch = (txq->ift_ctx->ifc_flags & IFC_PREFETCH);
+
+ while (n-- > 0) {
+ if (do_prefetch) {
+ prefetch(ifsd_m[(cidx + 3) & mask]);
+ prefetch(ifsd_m[(cidx + 4) & mask]);
+ }
+ if ((m = ifsd_m[cidx]) != NULL) {
+ prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]);
+ if (m->m_pkthdr.csum_flags & CSUM_TSO) {
+ bus_dmamap_sync(txq->ift_tso_buf_tag,
+ txq->ift_sds.ifsd_tso_map[cidx],
+ BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_tso_buf_tag,
+ txq->ift_sds.ifsd_tso_map[cidx]);
+ } else {
+ bus_dmamap_sync(txq->ift_buf_tag,
+ txq->ift_sds.ifsd_map[cidx],
+ BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_buf_tag,
+ txq->ift_sds.ifsd_map[cidx]);
+ }
+ /* XXX we don't support any drivers that batch packets yet */
+ MPASS(m->m_nextpkt == NULL);
+ m_freem(m);
+ ifsd_m[cidx] = NULL;
+#if MEMORY_LOGGING
+ txq->ift_dequeued++;
+#endif
+ DBG_COUNTER_INC(tx_frees);
+ }
+ if (__predict_false(++cidx == qsize)) {
+ cidx = 0;
+ gen = 0;
+ }
+ }
+ txq->ift_cidx = cidx;
+ txq->ift_gen = gen;
+}
+
+static __inline int
+iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh)
+{
+ int reclaim;
+ if_ctx_t ctx = txq->ift_ctx;
+
+ KASSERT(thresh >= 0, ("invalid threshold to reclaim"));
+ MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size);
+
+ /*
+ * Need a rate-limiting check so that this isn't called every time
+ */
+ iflib_tx_credits_update(ctx, txq);
+ reclaim = DESC_RECLAIMABLE(txq);
+
+ if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) {
+#ifdef INVARIANTS
+ if (iflib_verbose_debug) {
+ printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__,
+ txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments,
+ reclaim, thresh);
+
+ }
+#endif
+ return (0);
+ }
+ iflib_tx_desc_free(txq, reclaim);
+ txq->ift_cleaned += reclaim;
+ txq->ift_in_use -= reclaim;
+
+ return (reclaim);
+}
+
+static struct mbuf **
+_ring_peek_one(struct ifmp_ring *r, int cidx, int offset, int remaining)
+{
+ int next, size;
+ struct mbuf **items;
+
+ size = r->size;
+ next = (cidx + CACHE_PTR_INCREMENT) & (size-1);
+ items = __DEVOLATILE(struct mbuf **, &r->items[0]);
+
+ prefetch(items[(cidx + offset) & (size-1)]);
+ if (remaining > 1) {
+ prefetch2cachelines(&items[next]);
+ prefetch2cachelines(items[(cidx + offset + 1) & (size-1)]);
+ prefetch2cachelines(items[(cidx + offset + 2) & (size-1)]);
+ prefetch2cachelines(items[(cidx + offset + 3) & (size-1)]);
+ }
+ return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (size-1)]));
+}
+
+static void
+iflib_txq_check_drain(iflib_txq_t txq, int budget)
+{
+
+ ifmp_ring_check_drainage(txq->ift_br, budget);
+}
+
+static uint32_t
+iflib_txq_can_drain(struct ifmp_ring *r)
+{
+ iflib_txq_t txq = r->cookie;
+ if_ctx_t ctx = txq->ift_ctx;
+
+ if (TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2)
+ return (1);
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD);
+ return (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id,
+ false));
+}
+
+static uint32_t
+iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx)
+{
+ iflib_txq_t txq = r->cookie;
+ if_ctx_t ctx = txq->ift_ctx;
+ if_t ifp = ctx->ifc_ifp;
+ struct mbuf **mp, *m;
+ int i, count, consumed, pkt_sent, bytes_sent, mcast_sent, avail;
+ int reclaimed, err, in_use_prev, desc_used;
+ bool do_prefetch, ring, rang;
+
+ if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) ||
+ !LINK_ACTIVE(ctx))) {
+ DBG_COUNTER_INC(txq_drain_notready);
+ return (0);
+ }
+ reclaimed = iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
+ rang = iflib_txd_db_check(ctx, txq, reclaimed, txq->ift_in_use);
+ avail = IDXDIFF(pidx, cidx, r->size);
+ if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) {
+ DBG_COUNTER_INC(txq_drain_flushing);
+ for (i = 0; i < avail; i++) {
+ if (__predict_true(r->items[(cidx + i) & (r->size-1)] != (void *)txq))
+ m_free(r->items[(cidx + i) & (r->size-1)]);
+ r->items[(cidx + i) & (r->size-1)] = NULL;
+ }
+ return (avail);
+ }
+
+ if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) {
+ txq->ift_qstatus = IFLIB_QUEUE_IDLE;
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ CALLOUT_UNLOCK(txq);
+ DBG_COUNTER_INC(txq_drain_oactive);
+ return (0);
+ }
+ if (reclaimed)
+ txq->ift_qstatus = IFLIB_QUEUE_IDLE;
+ consumed = mcast_sent = bytes_sent = pkt_sent = 0;
+ count = MIN(avail, TX_BATCH_SIZE);
+#ifdef INVARIANTS
+ if (iflib_verbose_debug)
+ printf("%s avail=%d ifc_flags=%x txq_avail=%d ", __FUNCTION__,
+ avail, ctx->ifc_flags, TXQ_AVAIL(txq));
+#endif
+ do_prefetch = (ctx->ifc_flags & IFC_PREFETCH);
+ avail = TXQ_AVAIL(txq);
+ err = 0;
+ for (desc_used = i = 0; i < count && avail > MAX_TX_DESC(ctx) + 2; i++) {
+ int rem = do_prefetch ? count - i : 0;
+
+ mp = _ring_peek_one(r, cidx, i, rem);
+ MPASS(mp != NULL && *mp != NULL);
+ if (__predict_false(*mp == (struct mbuf *)txq)) {
+ consumed++;
+ reclaimed++;
+ continue;
+ }
+ in_use_prev = txq->ift_in_use;
+ err = iflib_encap(txq, mp);
+ if (__predict_false(err)) {
+ /* no room - bail out */
+ if (err == ENOBUFS)
+ break;
+ consumed++;
+ /* we can't send this packet - skip it */
+ continue;
+ }
+ consumed++;
+ pkt_sent++;
+ m = *mp;
+ DBG_COUNTER_INC(tx_sent);
+ bytes_sent += m->m_pkthdr.len;
+ mcast_sent += !!(m->m_flags & M_MCAST);
+ avail = TXQ_AVAIL(txq);
+
+ txq->ift_db_pending += (txq->ift_in_use - in_use_prev);
+ desc_used += (txq->ift_in_use - in_use_prev);
+ ETHER_BPF_MTAP(ifp, m);
+ if (__predict_false(!(ifp->if_drv_flags & IFF_DRV_RUNNING)))
+ break;
+ rang = iflib_txd_db_check(ctx, txq, false, in_use_prev);
+ }
+
+ /* deliberate use of bitwise or to avoid gratuitous short-circuit */
+ ring = rang ? false : (iflib_min_tx_latency | err) || (TXQ_AVAIL(txq) < MAX_TX_DESC(ctx));
+ iflib_txd_db_check(ctx, txq, ring, txq->ift_in_use);
+ if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent);
+ if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent);
+ if (mcast_sent)
+ if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent);
+#ifdef INVARIANTS
+ if (iflib_verbose_debug)
+ printf("consumed=%d\n", consumed);
+#endif
+ return (consumed);
+}
+
+static uint32_t
+iflib_txq_drain_always(struct ifmp_ring *r)
+{
+ return (1);
+}
+
+static uint32_t
+iflib_txq_drain_free(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx)
+{
+ int i, avail;
+ struct mbuf **mp;
+ iflib_txq_t txq;
+
+ txq = r->cookie;
+
+ txq->ift_qstatus = IFLIB_QUEUE_IDLE;
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ CALLOUT_UNLOCK(txq);
+
+ avail = IDXDIFF(pidx, cidx, r->size);
+ for (i = 0; i < avail; i++) {
+ mp = _ring_peek_one(r, cidx, i, avail - i);
+ if (__predict_false(*mp == (struct mbuf *)txq))
+ continue;
+ m_freem(*mp);
+ DBG_COUNTER_INC(tx_frees);
+ }
+ MPASS(ifmp_ring_is_stalled(r) == 0);
+ return (avail);
+}
+
+static void
+iflib_ifmp_purge(iflib_txq_t txq)
+{
+ struct ifmp_ring *r;
+
+ r = txq->ift_br;
+ r->drain = iflib_txq_drain_free;
+ r->can_drain = iflib_txq_drain_always;
+
+ ifmp_ring_check_drainage(r, r->size);
+
+ r->drain = iflib_txq_drain;
+ r->can_drain = iflib_txq_can_drain;
+}
+
+static void
+_task_fn_tx(void *context)
+{
+ iflib_txq_t txq = context;
+ if_ctx_t ctx = txq->ift_ctx;
+#if defined(ALTQ) || defined(DEV_NETMAP)
+ if_t ifp = ctx->ifc_ifp;
+#endif
+ int abdicate = ctx->ifc_sysctl_tx_abdicate;
+
+#ifdef IFLIB_DIAGNOSTICS
+ txq->ift_cpu_exec_count[curcpu]++;
+#endif
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+#ifdef DEV_NETMAP
+ if (if_getcapenable(ifp) & IFCAP_NETMAP) {
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD);
+ if (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, false))
+ netmap_tx_irq(ifp, txq->ift_id);
+ if (ctx->ifc_flags & IFC_LEGACY)
+ IFDI_INTR_ENABLE(ctx);
+ else
+ IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
+ return;
+ }
+#endif
+#ifdef ALTQ
+ if (ALTQ_IS_ENABLED(&ifp->if_snd))
+ iflib_altq_if_start(ifp);
+#endif
+ if (txq->ift_db_pending)
+ ifmp_ring_enqueue(txq->ift_br, (void **)&txq, 1, TX_BATCH_SIZE, abdicate);
+ else if (!abdicate)
+ ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
+ /*
+ * When abdicating, we always need to check drainage, not just when we don't enqueue
+ */
+ if (abdicate)
+ ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
+ if (ctx->ifc_flags & IFC_LEGACY)
+ IFDI_INTR_ENABLE(ctx);
+ else
+ IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
+}
+
+static void
+_task_fn_rx(void *context)
+{
+ iflib_rxq_t rxq = context;
+ if_ctx_t ctx = rxq->ifr_ctx;
+ bool more;
+ uint16_t budget;
+
+#ifdef IFLIB_DIAGNOSTICS
+ rxq->ifr_cpu_exec_count[curcpu]++;
+#endif
+ DBG_COUNTER_INC(task_fn_rxs);
+ if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
+ return;
+ more = true;
+#ifdef DEV_NETMAP
+ if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP) {
+ u_int work = 0;
+ if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &work)) {
+ more = false;
+ }
+ }
+#endif
+ budget = ctx->ifc_sysctl_rx_budget;
+ if (budget == 0)
+ budget = 16; /* XXX */
+ if (more == false || (more = iflib_rxeof(rxq, budget)) == false) {
+ if (ctx->ifc_flags & IFC_LEGACY)
+ IFDI_INTR_ENABLE(ctx);
+ else
+ IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
+ DBG_COUNTER_INC(rx_intr_enables);
+ }
+ if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
+ return;
+ if (more)
+ GROUPTASK_ENQUEUE(&rxq->ifr_task);
+}
+
+static void
+_task_fn_admin(void *context)
+{
+ if_ctx_t ctx = context;
+ if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
+ iflib_txq_t txq;
+ int i;
+ bool oactive, running, do_reset, do_watchdog, in_detach;
+ uint32_t reset_on = hz / 2;
+
+ STATE_LOCK(ctx);
+ running = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING);
+ oactive = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE);
+ do_reset = (ctx->ifc_flags & IFC_DO_RESET);
+ do_watchdog = (ctx->ifc_flags & IFC_DO_WATCHDOG);
+ in_detach = (ctx->ifc_flags & IFC_IN_DETACH);
+ ctx->ifc_flags &= ~(IFC_DO_RESET|IFC_DO_WATCHDOG);
+ STATE_UNLOCK(ctx);
+
+ if ((!running && !oactive) && !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN))
+ return;
+ if (in_detach)
+ return;
+
+ CTX_LOCK(ctx);
+ for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) {
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ CALLOUT_UNLOCK(txq);
+ }
+ if (do_watchdog) {
+ ctx->ifc_watchdog_events++;
+ IFDI_WATCHDOG_RESET(ctx);
+ }
+ IFDI_UPDATE_ADMIN_STATUS(ctx);
+ for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) {
+#ifdef DEV_NETMAP
+ reset_on = hz / 2;
+ if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP)
+ iflib_netmap_timer_adjust(ctx, txq, &reset_on);
+#endif
+ callout_reset_on(&txq->ift_timer, reset_on, iflib_timer, txq, txq->ift_timer.c_cpu);
+ }
+ IFDI_LINK_INTR_ENABLE(ctx);
+ if (do_reset)
+ iflib_if_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+
+ if (LINK_ACTIVE(ctx) == 0)
+ return;
+ for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++)
+ iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
+}
+
+
+static void
+_task_fn_iov(void *context)
+{
+ if_ctx_t ctx = context;
+
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) &&
+ !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN))
+ return;
+
+ CTX_LOCK(ctx);
+ IFDI_VFLR_HANDLE(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static int
+iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS)
+{
+ int err;
+ if_int_delay_info_t info;
+ if_ctx_t ctx;
+
+ info = (if_int_delay_info_t)arg1;
+ ctx = info->iidi_ctx;
+ info->iidi_req = req;
+ info->iidi_oidp = oidp;
+ CTX_LOCK(ctx);
+ err = IFDI_SYSCTL_INT_DELAY(ctx, info);
+ CTX_UNLOCK(ctx);
+ return (err);
+}
+
+/*********************************************************************
+ *
+ * IFNET FUNCTIONS
+ *
+ **********************************************************************/
+
+static void
+iflib_if_init_locked(if_ctx_t ctx)
+{
+ iflib_stop(ctx);
+ iflib_init_locked(ctx);
+}
+
+
+static void
+iflib_if_init(void *arg)
+{
+ if_ctx_t ctx = arg;
+
+ CTX_LOCK(ctx);
+ iflib_if_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static int
+iflib_if_transmit(if_t ifp, struct mbuf *m)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ iflib_txq_t txq;
+ int err, qidx;
+ int abdicate = ctx->ifc_sysctl_tx_abdicate;
+
+ if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) {
+ DBG_COUNTER_INC(tx_frees);
+ m_freem(m);
+ return (ENETDOWN);
+ }
+
+ MPASS(m->m_nextpkt == NULL);
+ /* ALTQ-enabled interfaces always use queue 0. */
+ qidx = 0;
+ if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m) && !ALTQ_IS_ENABLED(&ifp->if_snd))
+ qidx = QIDX(ctx, m);
+ /*
+ * XXX calculate buf_ring based on flowid (divvy up bits?)
+ */
+ txq = &ctx->ifc_txqs[qidx];
+
+#ifdef DRIVER_BACKPRESSURE
+ if (txq->ift_closed) {
+ while (m != NULL) {
+ next = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ m_freem(m);
+ DBG_COUNTER_INC(tx_frees);
+ m = next;
+ }
+ return (ENOBUFS);
+ }
+#endif
+#ifdef notyet
+ qidx = count = 0;
+ mp = marr;
+ next = m;
+ do {
+ count++;
+ next = next->m_nextpkt;
+ } while (next != NULL);
+
+ if (count > nitems(marr))
+ if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) {
+ /* XXX check nextpkt */
+ m_freem(m);
+ /* XXX simplify for now */
+ DBG_COUNTER_INC(tx_frees);
+ return (ENOBUFS);
+ }
+ for (next = m, i = 0; next != NULL; i++) {
+ mp[i] = next;
+ next = next->m_nextpkt;
+ mp[i]->m_nextpkt = NULL;
+ }
+#endif
+ DBG_COUNTER_INC(tx_seen);
+ err = ifmp_ring_enqueue(txq->ift_br, (void **)&m, 1, TX_BATCH_SIZE, abdicate);
+
+ if (abdicate)
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+ if (err) {
+ if (!abdicate)
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+ /* support forthcoming later */
+#ifdef DRIVER_BACKPRESSURE
+ txq->ift_closed = TRUE;
+#endif
+ ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
+ m_freem(m);
+ DBG_COUNTER_INC(tx_frees);
+ }
+
+ return (err);
+}
+
+#ifdef ALTQ
+/*
+ * The overall approach to integrating iflib with ALTQ is to continue to use
+ * the iflib mp_ring machinery between the ALTQ queue(s) and the hardware
+ * ring. Technically, when using ALTQ, queueing to an intermediate mp_ring
+ * is redundant/unnecessary, but doing so minimizes the amount of
+ * ALTQ-specific code required in iflib. It is assumed that the overhead of
+ * redundantly queueing to an intermediate mp_ring is swamped by the
+ * performance limitations inherent in using ALTQ.
+ *
+ * When ALTQ support is compiled in, all iflib drivers will use a transmit
+ * routine, iflib_altq_if_transmit(), that checks if ALTQ is enabled for the
+ * given interface. If ALTQ is enabled for an interface, then all
+ * transmitted packets for that interface will be submitted to the ALTQ
+ * subsystem via IFQ_ENQUEUE(). We don't use the legacy if_transmit()
+ * implementation because it uses IFQ_HANDOFF(), which will duplicatively
+ * update stats that the iflib machinery handles, and which is sensitve to
+ * the disused IFF_DRV_OACTIVE flag. Additionally, iflib_altq_if_start()
+ * will be installed as the start routine for use by ALTQ facilities that
+ * need to trigger queue drains on a scheduled basis.
+ *
+ */
+static void
+iflib_altq_if_start(if_t ifp)
+{
+ struct ifaltq *ifq = &ifp->if_snd;
+ struct mbuf *m;
+
+ IFQ_LOCK(ifq);
+ IFQ_DEQUEUE_NOLOCK(ifq, m);
+ while (m != NULL) {
+ iflib_if_transmit(ifp, m);
+ IFQ_DEQUEUE_NOLOCK(ifq, m);
+ }
+ IFQ_UNLOCK(ifq);
+}
+
+static int
+iflib_altq_if_transmit(if_t ifp, struct mbuf *m)
+{
+ int err;
+
+ if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
+ IFQ_ENQUEUE(&ifp->if_snd, m, err);
+ if (err == 0)
+ iflib_altq_if_start(ifp);
+ } else
+ err = iflib_if_transmit(ifp, m);
+
+ return (err);
+}
+#endif /* ALTQ */
+
+static void
+iflib_if_qflush(if_t ifp)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+ iflib_txq_t txq = ctx->ifc_txqs;
+ int i;
+
+ STATE_LOCK(ctx);
+ ctx->ifc_flags |= IFC_QFLUSH;
+ STATE_UNLOCK(ctx);
+ for (i = 0; i < NTXQSETS(ctx); i++, txq++)
+ while (!(ifmp_ring_is_idle(txq->ift_br) || ifmp_ring_is_stalled(txq->ift_br)))
+ iflib_txq_check_drain(txq, 0);
+ STATE_LOCK(ctx);
+ ctx->ifc_flags &= ~IFC_QFLUSH;
+ STATE_UNLOCK(ctx);
+
+ /*
+ * When ALTQ is enabled, this will also take care of purging the
+ * ALTQ queue(s).
+ */
+ if_qflush(ifp);
+}
+
+
+#define IFCAP_FLAGS (IFCAP_HWCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \
+ IFCAP_TSO | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \
+ IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | \
+ IFCAP_VLAN_HWTSO | IFCAP_VLAN_HWCSUM)
+
+static int
+iflib_if_ioctl(if_t ifp, u_long command, caddr_t data)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+ struct ifreq *ifr = (struct ifreq *)data;
+#if defined(INET) || defined(INET6)
+ struct ifaddr *ifa = (struct ifaddr *)data;
+#endif
+ bool avoid_reset = false;
+ int err = 0, reinit = 0, bits;
+
+ switch (command) {
+ case SIOCSIFADDR:
+#ifdef INET
+ if (ifa->ifa_addr->sa_family == AF_INET)
+ avoid_reset = true;
+#endif
+#ifdef INET6
+ if (ifa->ifa_addr->sa_family == AF_INET6)
+ avoid_reset = true;
+#endif
+ /*
+ ** Calling init results in link renegotiation,
+ ** so we avoid doing it when possible.
+ */
+ if (avoid_reset) {
+ if_setflagbits(ifp, IFF_UP,0);
+ if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
+ reinit = 1;
+#ifdef INET
+ if (!(if_getflags(ifp) & IFF_NOARP))
+ arp_ifinit(ifp, ifa);
+#endif
+ } else
+ err = ether_ioctl(ifp, command, data);
+ break;
+ case SIOCSIFMTU:
+ CTX_LOCK(ctx);
+ if (ifr->ifr_mtu == if_getmtu(ifp)) {
+ CTX_UNLOCK(ctx);
+ break;
+ }
+ bits = if_getdrvflags(ifp);
+ /* stop the driver and free any clusters before proceeding */
+ iflib_stop(ctx);
+
+ if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) {
+ STATE_LOCK(ctx);
+ if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size)
+ ctx->ifc_flags |= IFC_MULTISEG;
+ else
+ ctx->ifc_flags &= ~IFC_MULTISEG;
+ STATE_UNLOCK(ctx);
+ err = if_setmtu(ifp, ifr->ifr_mtu);
+ }
+ iflib_init_locked(ctx);
+ STATE_LOCK(ctx);
+ if_setdrvflags(ifp, bits);
+ STATE_UNLOCK(ctx);
+ CTX_UNLOCK(ctx);
+ break;
+ case SIOCSIFFLAGS:
+ CTX_LOCK(ctx);
+ if (if_getflags(ifp) & IFF_UP) {
+ if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
+ if ((if_getflags(ifp) ^ ctx->ifc_if_flags) &
+ (IFF_PROMISC | IFF_ALLMULTI)) {
+ err = IFDI_PROMISC_SET(ctx, if_getflags(ifp));
+ }
+ } else
+ reinit = 1;
+ } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
+ iflib_stop(ctx);
+ }
+ ctx->ifc_if_flags = if_getflags(ifp);
+ CTX_UNLOCK(ctx);
+ break;
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
+ CTX_LOCK(ctx);
+ IFDI_INTR_DISABLE(ctx);
+ IFDI_MULTI_SET(ctx);
+ IFDI_INTR_ENABLE(ctx);
+ CTX_UNLOCK(ctx);
+ }
+ break;
+ case SIOCSIFMEDIA:
+ CTX_LOCK(ctx);
+ IFDI_MEDIA_SET(ctx);
+ CTX_UNLOCK(ctx);
+ /* FALLTHROUGH */
+ case SIOCGIFMEDIA:
+ case SIOCGIFXMEDIA:
+ err = ifmedia_ioctl(ifp, ifr, &ctx->ifc_media, command);
+ break;
+ case SIOCGI2C:
+ {
+ struct ifi2creq i2c;
+
+ err = copyin(ifr_data_get_ptr(ifr), &i2c, sizeof(i2c));
+ if (err != 0)
+ break;
+ if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) {
+ err = EINVAL;
+ break;
+ }
+ if (i2c.len > sizeof(i2c.data)) {
+ err = EINVAL;
+ break;
+ }
+
+ if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0)
+ err = copyout(&i2c, ifr_data_get_ptr(ifr),
+ sizeof(i2c));
+ break;
+ }
+ case SIOCSIFCAP:
+ {
+ int mask, setmask, oldmask;
+
+ oldmask = if_getcapenable(ifp);
+ mask = ifr->ifr_reqcap ^ oldmask;
+ mask &= ctx->ifc_softc_ctx.isc_capabilities;
+ setmask = 0;
+#ifdef TCP_OFFLOAD
+ setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6);
+#endif
+ setmask |= (mask & IFCAP_FLAGS);
+ setmask |= (mask & IFCAP_WOL);
+
+ /*
+ * If any RX csum has changed, change all the ones that
+ * are supported by the driver.
+ */
+ if (setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
+ setmask |= ctx->ifc_softc_ctx.isc_capabilities &
+ (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
+ }
+
+ /*
+ * want to ensure that traffic has stopped before we change any of the flags
+ */
+ if (setmask) {
+ CTX_LOCK(ctx);
+ bits = if_getdrvflags(ifp);
+ if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
+ iflib_stop(ctx);
+ STATE_LOCK(ctx);
+ if_togglecapenable(ifp, setmask);
+ STATE_UNLOCK(ctx);
+ if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
+ iflib_init_locked(ctx);
+ STATE_LOCK(ctx);
+ if_setdrvflags(ifp, bits);
+ STATE_UNLOCK(ctx);
+ CTX_UNLOCK(ctx);
+ }
+ if_vlancap(ifp);
+ break;
+ }
+ case SIOCGPRIVATE_0:
+ case SIOCSDRVSPEC:
+ case SIOCGDRVSPEC:
+ CTX_LOCK(ctx);
+ err = IFDI_PRIV_IOCTL(ctx, command, data);
+ CTX_UNLOCK(ctx);
+ break;
+ default:
+ err = ether_ioctl(ifp, command, data);
+ break;
+ }
+ if (reinit)
+ iflib_if_init(ctx);
+ return (err);
+}
+
+static uint64_t
+iflib_if_get_counter(if_t ifp, ift_counter cnt)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ return (IFDI_GET_COUNTER(ctx, cnt));
+}
+
+/*********************************************************************
+ *
+ * OTHER FUNCTIONS EXPORTED TO THE STACK
+ *
+ **********************************************************************/
+
+static void
+iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ if ((void *)ctx != arg)
+ return;
+
+ if ((vtag == 0) || (vtag > 4095))
+ return;
+
+ CTX_LOCK(ctx);
+ IFDI_VLAN_REGISTER(ctx, vtag);
+ /* Re-init to load the changes */
+ if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
+ iflib_if_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ if ((void *)ctx != arg)
+ return;
+
+ if ((vtag == 0) || (vtag > 4095))
+ return;
+
+ CTX_LOCK(ctx);
+ IFDI_VLAN_UNREGISTER(ctx, vtag);
+ /* Re-init to load the changes */
+ if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
+ iflib_if_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_led_func(void *arg, int onoff)
+{
+ if_ctx_t ctx = arg;
+
+ CTX_LOCK(ctx);
+ IFDI_LED_FUNC(ctx, onoff);
+ CTX_UNLOCK(ctx);
+}
+
+/*********************************************************************
+ *
+ * BUS FUNCTION DEFINITIONS
+ *
+ **********************************************************************/
+
+int
+iflib_device_probe(device_t dev)
+{
+ pci_vendor_info_t *ent;
+
+ uint16_t pci_vendor_id, pci_device_id;
+ uint16_t pci_subvendor_id, pci_subdevice_id;
+ uint16_t pci_rev_id;
+ if_shared_ctx_t sctx;
+
+ if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
+ return (ENOTSUP);
+
+ pci_vendor_id = pci_get_vendor(dev);
+ pci_device_id = pci_get_device(dev);
+ pci_subvendor_id = pci_get_subvendor(dev);
+ pci_subdevice_id = pci_get_subdevice(dev);
+ pci_rev_id = pci_get_revid(dev);
+ if (sctx->isc_parse_devinfo != NULL)
+ sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id);
+
+ ent = sctx->isc_vendor_info;
+ while (ent->pvi_vendor_id != 0) {
+ if (pci_vendor_id != ent->pvi_vendor_id) {
+ ent++;
+ continue;
+ }
+ if ((pci_device_id == ent->pvi_device_id) &&
+ ((pci_subvendor_id == ent->pvi_subvendor_id) ||
+ (ent->pvi_subvendor_id == 0)) &&
+ ((pci_subdevice_id == ent->pvi_subdevice_id) ||
+ (ent->pvi_subdevice_id == 0)) &&
+ ((pci_rev_id == ent->pvi_rev_id) ||
+ (ent->pvi_rev_id == 0))) {
+
+ device_set_desc_copy(dev, ent->pvi_name);
+ /* this needs to be changed to zero if the bus probing code
+ * ever stops re-probing on best match because the sctx
+ * may have its values over written by register calls
+ * in subsequent probes
+ */
+ return (BUS_PROBE_DEFAULT);
+ }
+ ent++;
+ }
+ return (ENXIO);
+}
+
+int
+iflib_device_probe_vendor(device_t dev)
+{
+ int probe;
+
+ probe = iflib_device_probe(dev);
+ if (probe == BUS_PROBE_DEFAULT)
+ return (BUS_PROBE_VENDOR);
+ else
+ return (probe);
+}
+
+static void
+iflib_reset_qvalues(if_ctx_t ctx)
+{
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ device_t dev = ctx->ifc_dev;
+ int i;
+
+ scctx->isc_txrx_budget_bytes_max = IFLIB_MAX_TX_BYTES;
+ scctx->isc_tx_qdepth = IFLIB_DEFAULT_TX_QDEPTH;
+ if (ctx->ifc_sysctl_ntxqs != 0)
+ scctx->isc_ntxqsets = ctx->ifc_sysctl_ntxqs;
+ if (ctx->ifc_sysctl_nrxqs != 0)
+ scctx->isc_nrxqsets = ctx->ifc_sysctl_nrxqs;
+
+ for (i = 0; i < sctx->isc_ntxqs; i++) {
+ if (ctx->ifc_sysctl_ntxds[i] != 0)
+ scctx->isc_ntxd[i] = ctx->ifc_sysctl_ntxds[i];
+ else
+ scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i];
+ }
+
+ for (i = 0; i < sctx->isc_nrxqs; i++) {
+ if (ctx->ifc_sysctl_nrxds[i] != 0)
+ scctx->isc_nrxd[i] = ctx->ifc_sysctl_nrxds[i];
+ else
+ scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i];
+ }
+
+ for (i = 0; i < sctx->isc_nrxqs; i++) {
+ if (scctx->isc_nrxd[i] < sctx->isc_nrxd_min[i]) {
+ device_printf(dev, "nrxd%d: %d less than nrxd_min %d - resetting to min\n",
+ i, scctx->isc_nrxd[i], sctx->isc_nrxd_min[i]);
+ scctx->isc_nrxd[i] = sctx->isc_nrxd_min[i];
+ }
+ if (scctx->isc_nrxd[i] > sctx->isc_nrxd_max[i]) {
+ device_printf(dev, "nrxd%d: %d greater than nrxd_max %d - resetting to max\n",
+ i, scctx->isc_nrxd[i], sctx->isc_nrxd_max[i]);
+ scctx->isc_nrxd[i] = sctx->isc_nrxd_max[i];
+ }
+ if (!powerof2(scctx->isc_nrxd[i])) {
+ device_printf(dev, "nrxd%d: %d is not a power of 2 - using default value of %d\n",
+ i, scctx->isc_nrxd[i], sctx->isc_nrxd_default[i]);
+ scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i];
+ }
+ }
+
+ for (i = 0; i < sctx->isc_ntxqs; i++) {
+ if (scctx->isc_ntxd[i] < sctx->isc_ntxd_min[i]) {
+ device_printf(dev, "ntxd%d: %d less than ntxd_min %d - resetting to min\n",
+ i, scctx->isc_ntxd[i], sctx->isc_ntxd_min[i]);
+ scctx->isc_ntxd[i] = sctx->isc_ntxd_min[i];
+ }
+ if (scctx->isc_ntxd[i] > sctx->isc_ntxd_max[i]) {
+ device_printf(dev, "ntxd%d: %d greater than ntxd_max %d - resetting to max\n",
+ i, scctx->isc_ntxd[i], sctx->isc_ntxd_max[i]);
+ scctx->isc_ntxd[i] = sctx->isc_ntxd_max[i];
+ }
+ if (!powerof2(scctx->isc_ntxd[i])) {
+ device_printf(dev, "ntxd%d: %d is not a power of 2 - using default value of %d\n",
+ i, scctx->isc_ntxd[i], sctx->isc_ntxd_default[i]);
+ scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i];
+ }
+ }
+}
+
+static uint16_t
+get_ctx_core_offset(if_ctx_t ctx)
+{
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ struct cpu_offset *op;
+ uint16_t qc;
+ uint16_t ret = ctx->ifc_sysctl_core_offset;
+
+ if (ret != CORE_OFFSET_UNSPECIFIED)
+ return (ret);
+
+ if (ctx->ifc_sysctl_separate_txrx)
+ qc = scctx->isc_ntxqsets + scctx->isc_nrxqsets;
+ else
+ qc = max(scctx->isc_ntxqsets, scctx->isc_nrxqsets);
+
+ mtx_lock(&cpu_offset_mtx);
+ SLIST_FOREACH(op, &cpu_offsets, entries) {
+ if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) {
+ ret = op->offset;
+ op->offset += qc;
+ MPASS(op->refcount < UINT_MAX);
+ op->refcount++;
+ break;
+ }
+ }
+ if (ret == CORE_OFFSET_UNSPECIFIED) {
+ ret = 0;
+ op = malloc(sizeof(struct cpu_offset), M_IFLIB,
+ M_NOWAIT | M_ZERO);
+ if (op == NULL) {
+ device_printf(ctx->ifc_dev,
+ "allocation for cpu offset failed.\n");
+ } else {
+ op->offset = qc;
+ op->refcount = 1;
+ CPU_COPY(&ctx->ifc_cpus, &op->set);
+ SLIST_INSERT_HEAD(&cpu_offsets, op, entries);
+ }
+ }
+ mtx_unlock(&cpu_offset_mtx);
+
+ return (ret);
+}
+
+static void
+unref_ctx_core_offset(if_ctx_t ctx)
+{
+ struct cpu_offset *op, *top;
+
+ mtx_lock(&cpu_offset_mtx);
+ SLIST_FOREACH_SAFE(op, &cpu_offsets, entries, top) {
+ if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) {
+ MPASS(op->refcount > 0);
+ op->refcount--;
+ if (op->refcount == 0) {
+ SLIST_REMOVE(&cpu_offsets, op, cpu_offset, entries);
+ free(op, M_IFLIB);
+ }
+ break;
+ }
+ }
+ mtx_unlock(&cpu_offset_mtx);
+}
+
+int
+iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp)
+{
+ if_ctx_t ctx;
+ if_t ifp;
+ if_softc_ctx_t scctx;
+ kobjop_desc_t kobj_desc;
+ kobj_method_t *kobj_method;
+ int err, msix, rid;
+ uint16_t main_rxq, main_txq;
+
+ ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO);
+
+ if (sc == NULL) {
+ sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO);
+ device_set_softc(dev, ctx);
+ ctx->ifc_flags |= IFC_SC_ALLOCATED;
+ }
+
+ ctx->ifc_sctx = sctx;
+ ctx->ifc_dev = dev;
+ ctx->ifc_softc = sc;
+
+ if ((err = iflib_register(ctx)) != 0) {
+ device_printf(dev, "iflib_register failed %d\n", err);
+ goto fail_ctx_free;
+ }
+ iflib_add_device_sysctl_pre(ctx);
+
+ scctx = &ctx->ifc_softc_ctx;
+ ifp = ctx->ifc_ifp;
+
+ iflib_reset_qvalues(ctx);
+ CTX_LOCK(ctx);
+ if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
+ goto fail_unlock;
+ }
+ _iflib_pre_assert(scctx);
+ ctx->ifc_txrx = *scctx->isc_txrx;
+
+#ifdef INVARIANTS
+ if (scctx->isc_capabilities & IFCAP_TXCSUM)
+ MPASS(scctx->isc_tx_csum_flags);
+#endif
+
+ if_setcapabilities(ifp, scctx->isc_capabilities | IFCAP_HWSTATS);
+ if_setcapenable(ifp, scctx->isc_capenable | IFCAP_HWSTATS);
+
+ if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets))
+ scctx->isc_ntxqsets = scctx->isc_ntxqsets_max;
+ if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets))
+ scctx->isc_nrxqsets = scctx->isc_nrxqsets_max;
+
+ main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0;
+ main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0;
+
+ /* XXX change for per-queue sizes */
+ device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n",
+ scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]);
+
+ if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] /
+ MAX_SINGLE_PACKET_FRACTION)
+ scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] /
+ MAX_SINGLE_PACKET_FRACTION);
+ if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] /
+ MAX_SINGLE_PACKET_FRACTION)
+ scctx->isc_tx_tso_segments_max = max(1,
+ scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION);
+
+ /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
+ if (if_getcapabilities(ifp) & IFCAP_TSO) {
+ /*
+ * The stack can't handle a TSO size larger than IP_MAXPACKET,
+ * but some MACs do.
+ */
+ if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max,
+ IP_MAXPACKET));
+ /*
+ * Take maximum number of m_pullup(9)'s in iflib_parse_header()
+ * into account. In the worst case, each of these calls will
+ * add another mbuf and, thus, the requirement for another DMA
+ * segment. So for best performance, it doesn't make sense to
+ * advertize a maximum of TSO segments that typically will
+ * require defragmentation in iflib_encap().
+ */
+ if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3);
+ if_sethwtsomaxsegsize(ifp, scctx->isc_tx_tso_segsize_max);
+ }
+ if (scctx->isc_rss_table_size == 0)
+ scctx->isc_rss_table_size = 64;
+ scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;
+
+ GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx);
+ /* XXX format name */
+ taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx,
+ -1, "admin");
+
+ /* Set up cpu set. If it fails, use the set of all CPUs. */
+ if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) != 0) {
+ device_printf(dev, "Unable to fetch CPU list\n");
+ CPU_COPY(&all_cpus, &ctx->ifc_cpus);
+ }
+ MPASS(CPU_COUNT(&ctx->ifc_cpus) > 0);
+
+ /*
+ ** Now set up MSI or MSI-X, should return us the number of supported
+ ** vectors (will be 1 for a legacy interrupt and MSI).
+ */
+ if (sctx->isc_flags & IFLIB_SKIP_MSIX) {
+ msix = scctx->isc_vectors;
+ } else if (scctx->isc_msix_bar != 0)
+ /*
+ * The simple fact that isc_msix_bar is not 0 does not mean we
+ * we have a good value there that is known to work.
+ */
+ msix = iflib_msix_init(ctx);
+ else {
+ scctx->isc_vectors = 1;
+ scctx->isc_ntxqsets = 1;
+ scctx->isc_nrxqsets = 1;
+ scctx->isc_intr = IFLIB_INTR_LEGACY;
+ msix = 0;
+ }
+ /* Get memory for the station queues */
+ if ((err = iflib_queues_alloc(ctx))) {
+ device_printf(dev, "Unable to allocate queue memory\n");
+ goto fail_intr_free;
+ }
+
+ if ((err = iflib_qset_structures_setup(ctx)))
+ goto fail_queues;
+
+ /*
+ * Now that we know how many queues there are, get the core offset.
+ */
+ ctx->ifc_sysctl_core_offset = get_ctx_core_offset(ctx);
+
+ /*
+ * Group taskqueues aren't properly set up until SMP is started,
+ * so we disable interrupts until we can handle them post
+ * SI_SUB_SMP.
+ *
+ * XXX: disabling interrupts doesn't actually work, at least for
+ * the non-MSI case. When they occur before SI_SUB_SMP completes,
+ * we do null handling and depend on this not causing too large an
+ * interrupt storm.
+ */
+ IFDI_INTR_DISABLE(ctx);
+
+ if (msix > 1) {
+ /*
+ * When using MSI-X, ensure that ifdi_{r,t}x_queue_intr_enable
+ * aren't the default NULL implementation.
+ */
+ kobj_desc = &ifdi_rx_queue_intr_enable_desc;
+ kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL,
+ kobj_desc);
+ if (kobj_method == &kobj_desc->deflt) {
+ device_printf(dev,
+ "MSI-X requires ifdi_rx_queue_intr_enable method");
+ err = EOPNOTSUPP;
+ goto fail_queues;
+ }
+ kobj_desc = &ifdi_tx_queue_intr_enable_desc;
+ kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL,
+ kobj_desc);
+ if (kobj_method == &kobj_desc->deflt) {
+ device_printf(dev,
+ "MSI-X requires ifdi_tx_queue_intr_enable method");
+ err = EOPNOTSUPP;
+ goto fail_queues;
+ }
+
+ /*
+ * Assign the MSI-X vectors.
+ * Note that the default NULL ifdi_msix_intr_assign method will
+ * fail here, too.
+ */
+ err = IFDI_MSIX_INTR_ASSIGN(ctx, msix);
+ if (err != 0) {
+ device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n",
+ err);
+ goto fail_queues;
+ }
+ } else if (scctx->isc_intr != IFLIB_INTR_MSIX) {
+ rid = 0;
+ if (scctx->isc_intr == IFLIB_INTR_MSI) {
+ MPASS(msix == 1);
+ rid = 1;
+ }
+ if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx->ifc_softc, &rid, "irq0")) != 0) {
+ device_printf(dev, "iflib_legacy_setup failed %d\n", err);
+ goto fail_queues;
+ }
+ } else {
+ device_printf(dev,
+ "Cannot use iflib with only 1 MSI-X interrupt!\n");
+ err = ENODEV;
+ goto fail_intr_free;
+ }
+
+ ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac);
+
+ if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
+ goto fail_detach;
+ }
+
+ /*
+ * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
+ * This must appear after the call to ether_ifattach() because
+ * ether_ifattach() sets if_hdrlen to the default value.
+ */
+ if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
+ if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
+
+ if ((err = iflib_netmap_attach(ctx))) {
+ device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err);
+ goto fail_detach;
+ }
+ *ctxp = ctx;
+
+ NETDUMP_SET(ctx->ifc_ifp, iflib);
+
+ if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
+ iflib_add_device_sysctl_post(ctx);
+ ctx->ifc_flags |= IFC_INIT_DONE;
+ CTX_UNLOCK(ctx);
+
+ return (0);
+
+fail_detach:
+ ether_ifdetach(ctx->ifc_ifp);
+fail_intr_free:
+ iflib_free_intr_mem(ctx);
+fail_queues:
+ iflib_tx_structures_free(ctx);
+ iflib_rx_structures_free(ctx);
+ taskqgroup_detach(qgroup_if_config_tqg, &ctx->ifc_admin_task);
+ IFDI_DETACH(ctx);
+fail_unlock:
+ CTX_UNLOCK(ctx);
+ iflib_deregister(ctx);
+fail_ctx_free:
+ device_set_softc(ctx->ifc_dev, NULL);
+ if (ctx->ifc_flags & IFC_SC_ALLOCATED)
+ free(ctx->ifc_softc, M_IFLIB);
+ free(ctx, M_IFLIB);
+ return (err);
+}
+
+int
+iflib_pseudo_register(device_t dev, if_shared_ctx_t sctx, if_ctx_t *ctxp,
+ struct iflib_cloneattach_ctx *clctx)
+{
+ int err;
+ if_ctx_t ctx;
+ if_t ifp;
+ if_softc_ctx_t scctx;
+ int i;
+ void *sc;
+ uint16_t main_txq;
+ uint16_t main_rxq;
+
+ ctx = malloc(sizeof(*ctx), M_IFLIB, M_WAITOK|M_ZERO);
+ sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO);
+ ctx->ifc_flags |= IFC_SC_ALLOCATED;
+ if (sctx->isc_flags & (IFLIB_PSEUDO|IFLIB_VIRTUAL))
+ ctx->ifc_flags |= IFC_PSEUDO;
+
+ ctx->ifc_sctx = sctx;
+ ctx->ifc_softc = sc;
+ ctx->ifc_dev = dev;
+
+ if ((err = iflib_register(ctx)) != 0) {
+ device_printf(dev, "%s: iflib_register failed %d\n", __func__, err);
+ goto fail_ctx_free;
+ }
+ iflib_add_device_sysctl_pre(ctx);
+
+ scctx = &ctx->ifc_softc_ctx;
+ ifp = ctx->ifc_ifp;
+
+ iflib_reset_qvalues(ctx);
+ CTX_LOCK(ctx);
+ if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
+ goto fail_unlock;
+ }
+ if (sctx->isc_flags & IFLIB_GEN_MAC)
+ iflib_gen_mac(ctx);
+ if ((err = IFDI_CLONEATTACH(ctx, clctx->cc_ifc, clctx->cc_name,
+ clctx->cc_params)) != 0) {
+ device_printf(dev, "IFDI_CLONEATTACH failed %d\n", err);
+ goto fail_ctx_free;
+ }
+ ifmedia_add(&ctx->ifc_media, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
+ ifmedia_add(&ctx->ifc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
+ ifmedia_set(&ctx->ifc_media, IFM_ETHER | IFM_AUTO);
+
+#ifdef INVARIANTS
+ if (scctx->isc_capabilities & IFCAP_TXCSUM)
+ MPASS(scctx->isc_tx_csum_flags);
+#endif
+
+ if_setcapabilities(ifp, scctx->isc_capabilities | IFCAP_HWSTATS | IFCAP_LINKSTATE);
+ if_setcapenable(ifp, scctx->isc_capenable | IFCAP_HWSTATS | IFCAP_LINKSTATE);
+
+ ifp->if_flags |= IFF_NOGROUP;
+ if (sctx->isc_flags & IFLIB_PSEUDO) {
+ ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac);
+
+ if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
+ goto fail_detach;
+ }
+ *ctxp = ctx;
+
+ /*
+ * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
+ * This must appear after the call to ether_ifattach() because
+ * ether_ifattach() sets if_hdrlen to the default value.
+ */
+ if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
+ if_setifheaderlen(ifp,
+ sizeof(struct ether_vlan_header));
+
+ if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
+ iflib_add_device_sysctl_post(ctx);
+ ctx->ifc_flags |= IFC_INIT_DONE;
+ return (0);
+ }
+ _iflib_pre_assert(scctx);
+ ctx->ifc_txrx = *scctx->isc_txrx;
+
+ if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets))
+ scctx->isc_ntxqsets = scctx->isc_ntxqsets_max;
+ if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets))
+ scctx->isc_nrxqsets = scctx->isc_nrxqsets_max;
+
+ main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0;
+ main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0;
+
+ /* XXX change for per-queue sizes */
+ device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n",
+ scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]);
+
+ if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] /
+ MAX_SINGLE_PACKET_FRACTION)
+ scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] /
+ MAX_SINGLE_PACKET_FRACTION);
+ if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] /
+ MAX_SINGLE_PACKET_FRACTION)
+ scctx->isc_tx_tso_segments_max = max(1,
+ scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION);
+
+ /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
+ if (if_getcapabilities(ifp) & IFCAP_TSO) {
+ /*
+ * The stack can't handle a TSO size larger than IP_MAXPACKET,
+ * but some MACs do.
+ */
+ if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max,
+ IP_MAXPACKET));
+ /*
+ * Take maximum number of m_pullup(9)'s in iflib_parse_header()
+ * into account. In the worst case, each of these calls will
+ * add another mbuf and, thus, the requirement for another DMA
+ * segment. So for best performance, it doesn't make sense to
+ * advertize a maximum of TSO segments that typically will
+ * require defragmentation in iflib_encap().
+ */
+ if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3);
+ if_sethwtsomaxsegsize(ifp, scctx->isc_tx_tso_segsize_max);
+ }
+ if (scctx->isc_rss_table_size == 0)
+ scctx->isc_rss_table_size = 64;
+ scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;
+
+ GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx);
+ /* XXX format name */
+ taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx,
+ -1, "admin");
+
+ /* XXX --- can support > 1 -- but keep it simple for now */
+ scctx->isc_intr = IFLIB_INTR_LEGACY;
+
+ /* Get memory for the station queues */
+ if ((err = iflib_queues_alloc(ctx))) {
+ device_printf(dev, "Unable to allocate queue memory\n");
+ goto fail_iflib_detach;
+ }
+
+ if ((err = iflib_qset_structures_setup(ctx))) {
+ device_printf(dev, "qset structure setup failed %d\n", err);
+ goto fail_queues;
+ }
+
+ /*
+ * XXX What if anything do we want to do about interrupts?
+ */
+ ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac);
+ if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
+ goto fail_detach;
+ }
+
+ /*
+ * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
+ * This must appear after the call to ether_ifattach() because
+ * ether_ifattach() sets if_hdrlen to the default value.
+ */
+ if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
+ if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
+
+ /* XXX handle more than one queue */
+ for (i = 0; i < scctx->isc_nrxqsets; i++)
+ IFDI_RX_CLSET(ctx, 0, i, ctx->ifc_rxqs[i].ifr_fl[0].ifl_sds.ifsd_cl);
+
+ *ctxp = ctx;
+
+ if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
+ iflib_add_device_sysctl_post(ctx);
+ ctx->ifc_flags |= IFC_INIT_DONE;
+ CTX_UNLOCK(ctx);
+
+ return (0);
+fail_detach:
+ ether_ifdetach(ctx->ifc_ifp);
+fail_queues:
+ iflib_tx_structures_free(ctx);
+ iflib_rx_structures_free(ctx);
+fail_iflib_detach:
+ IFDI_DETACH(ctx);
+fail_unlock:
+ CTX_UNLOCK(ctx);
+ iflib_deregister(ctx);
+fail_ctx_free:
+ free(ctx->ifc_softc, M_IFLIB);
+ free(ctx, M_IFLIB);
+ return (err);
+}
+
+int
+iflib_pseudo_deregister(if_ctx_t ctx)
+{
+ if_t ifp = ctx->ifc_ifp;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ int i, j;
+ struct taskqgroup *tqg;
+ iflib_fl_t fl;
+
+ ether_ifdetach(ifp);
+ /* XXX drain any dependent tasks */
+ tqg = qgroup_if_io_tqg;
+ for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) {
+ callout_drain(&txq->ift_timer);
+ if (txq->ift_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &txq->ift_task);
+ }
+ for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
+ if (rxq->ifr_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &rxq->ifr_task);
+
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
+ free(fl->ifl_rx_bitmap, M_IFLIB);
+ }
+ tqg = qgroup_if_config_tqg;
+ if (ctx->ifc_admin_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &ctx->ifc_admin_task);
+ if (ctx->ifc_vflr_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &ctx->ifc_vflr_task);
+
+ iflib_tx_structures_free(ctx);
+ iflib_rx_structures_free(ctx);
+
+ iflib_deregister(ctx);
+
+ if (ctx->ifc_flags & IFC_SC_ALLOCATED)
+ free(ctx->ifc_softc, M_IFLIB);
+ free(ctx, M_IFLIB);
+ return (0);
+}
+
+int
+iflib_device_attach(device_t dev)
+{
+ if_ctx_t ctx;
+ if_shared_ctx_t sctx;
+
+ if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
+ return (ENOTSUP);
+
+ pci_enable_busmaster(dev);
+
+ return (iflib_device_register(dev, NULL, sctx, &ctx));
+}
+
+int
+iflib_device_deregister(if_ctx_t ctx)
+{
+ if_t ifp = ctx->ifc_ifp;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ device_t dev = ctx->ifc_dev;
+ int i, j;
+ struct taskqgroup *tqg;
+ iflib_fl_t fl;
+
+ /* Make sure VLANS are not using driver */
+ if (if_vlantrunkinuse(ifp)) {
+ device_printf(dev, "Vlan in use, detach first\n");
+ return (EBUSY);
+ }
+#ifdef PCI_IOV
+ if (!CTX_IS_VF(ctx) && pci_iov_detach(dev) != 0) {
+ device_printf(dev, "SR-IOV in use; detach first.\n");
+ return (EBUSY);
+ }
+#endif
+
+ STATE_LOCK(ctx);
+ ctx->ifc_flags |= IFC_IN_DETACH;
+ STATE_UNLOCK(ctx);
+
+ CTX_LOCK(ctx);
+ iflib_stop(ctx);
+ CTX_UNLOCK(ctx);
+
+ /* Unregister VLAN events */
+ if (ctx->ifc_vlan_attach_event != NULL)
+ EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event);
+ if (ctx->ifc_vlan_detach_event != NULL)
+ EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event);
+
+ iflib_netmap_detach(ifp);
+ ether_ifdetach(ifp);
+ if (ctx->ifc_led_dev != NULL)
+ led_destroy(ctx->ifc_led_dev);
+ /* XXX drain any dependent tasks */
+ tqg = qgroup_if_io_tqg;
+ for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) {
+ callout_drain(&txq->ift_timer);
+ if (txq->ift_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &txq->ift_task);
+ }
+ for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
+ if (rxq->ifr_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &rxq->ifr_task);
+
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
+ free(fl->ifl_rx_bitmap, M_IFLIB);
+ }
+ tqg = qgroup_if_config_tqg;
+ if (ctx->ifc_admin_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &ctx->ifc_admin_task);
+ if (ctx->ifc_vflr_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &ctx->ifc_vflr_task);
+ CTX_LOCK(ctx);
+ IFDI_DETACH(ctx);
+ CTX_UNLOCK(ctx);
+
+ /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
+ iflib_free_intr_mem(ctx);
+
+ bus_generic_detach(dev);
+
+ iflib_tx_structures_free(ctx);
+ iflib_rx_structures_free(ctx);
+
+ iflib_deregister(ctx);
+
+ device_set_softc(ctx->ifc_dev, NULL);
+ if (ctx->ifc_flags & IFC_SC_ALLOCATED)
+ free(ctx->ifc_softc, M_IFLIB);
+ unref_ctx_core_offset(ctx);
+ free(ctx, M_IFLIB);
+ return (0);
+}
+
+static void
+iflib_free_intr_mem(if_ctx_t ctx)
+{
+
+ if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) {
+ iflib_irq_free(ctx, &ctx->ifc_legacy_irq);
+ }
+ if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) {
+ pci_release_msi(ctx->ifc_dev);
+ }
+ if (ctx->ifc_msix_mem != NULL) {
+ bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY,
+ rman_get_rid(ctx->ifc_msix_mem), ctx->ifc_msix_mem);
+ ctx->ifc_msix_mem = NULL;
+ }
+}
+
+int
+iflib_device_detach(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ return (iflib_device_deregister(ctx));
+}
+
+int
+iflib_device_suspend(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ IFDI_SUSPEND(ctx);
+ CTX_UNLOCK(ctx);
+
+ return bus_generic_suspend(dev);
+}
+int
+iflib_device_shutdown(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ IFDI_SHUTDOWN(ctx);
+ CTX_UNLOCK(ctx);
+
+ return bus_generic_suspend(dev);
+}
+
+
+int
+iflib_device_resume(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+ iflib_txq_t txq = ctx->ifc_txqs;
+
+ CTX_LOCK(ctx);
+ IFDI_RESUME(ctx);
+ iflib_if_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+ for (int i = 0; i < NTXQSETS(ctx); i++, txq++)
+ iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
+
+ return (bus_generic_resume(dev));
+}
+
+int
+iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params)
+{
+ int error;
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ error = IFDI_IOV_INIT(ctx, num_vfs, params);
+ CTX_UNLOCK(ctx);
+
+ return (error);
+}
+
+void
+iflib_device_iov_uninit(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ IFDI_IOV_UNINIT(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+int
+iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params)
+{
+ int error;
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ error = IFDI_IOV_VF_ADD(ctx, vfnum, params);
+ CTX_UNLOCK(ctx);
+
+ return (error);
+}
+
+/*********************************************************************
+ *
+ * MODULE FUNCTION DEFINITIONS
+ *
+ **********************************************************************/
+
+/*
+ * - Start a fast taskqueue thread for each core
+ * - Start a taskqueue for control operations
+ */
+static int
+iflib_module_init(void)
+{
+ return (0);
+}
+
+static int
+iflib_module_event_handler(module_t mod, int what, void *arg)
+{
+ int err;
+
+ switch (what) {
+ case MOD_LOAD:
+ if ((err = iflib_module_init()) != 0)
+ return (err);
+ break;
+ case MOD_UNLOAD:
+ return (EBUSY);
+ default:
+ return (EOPNOTSUPP);
+ }
+
+ return (0);
+}
+
+/*********************************************************************
+ *
+ * PUBLIC FUNCTION DEFINITIONS
+ * ordered as in iflib.h
+ *
+ **********************************************************************/
+
+
+static void
+_iflib_assert(if_shared_ctx_t sctx)
+{
+ int i;
+
+ MPASS(sctx->isc_tx_maxsize);
+ MPASS(sctx->isc_tx_maxsegsize);
+
+ MPASS(sctx->isc_rx_maxsize);
+ MPASS(sctx->isc_rx_nsegments);
+ MPASS(sctx->isc_rx_maxsegsize);
+
+ MPASS(sctx->isc_nrxqs >= 1 && sctx->isc_nrxqs <= 8);
+ for (i = 0; i < sctx->isc_nrxqs; i++) {
+ MPASS(sctx->isc_nrxd_min[i]);
+ MPASS(powerof2(sctx->isc_nrxd_min[i]));
+ MPASS(sctx->isc_nrxd_max[i]);
+ MPASS(powerof2(sctx->isc_nrxd_max[i]));
+ MPASS(sctx->isc_nrxd_default[i]);
+ MPASS(powerof2(sctx->isc_nrxd_default[i]));
+ }
+
+ MPASS(sctx->isc_ntxqs >= 1 && sctx->isc_ntxqs <= 8);
+ for (i = 0; i < sctx->isc_ntxqs; i++) {
+ MPASS(sctx->isc_ntxd_min[i]);
+ MPASS(powerof2(sctx->isc_ntxd_min[i]));
+ MPASS(sctx->isc_ntxd_max[i]);
+ MPASS(powerof2(sctx->isc_ntxd_max[i]));
+ MPASS(sctx->isc_ntxd_default[i]);
+ MPASS(powerof2(sctx->isc_ntxd_default[i]));
+ }
+}
+
+static void
+_iflib_pre_assert(if_softc_ctx_t scctx)
+{
+
+ MPASS(scctx->isc_txrx->ift_txd_encap);
+ MPASS(scctx->isc_txrx->ift_txd_flush);
+ MPASS(scctx->isc_txrx->ift_txd_credits_update);
+ MPASS(scctx->isc_txrx->ift_rxd_available);
+ MPASS(scctx->isc_txrx->ift_rxd_pkt_get);
+ MPASS(scctx->isc_txrx->ift_rxd_refill);
+ MPASS(scctx->isc_txrx->ift_rxd_flush);
+}
+
+static int
+iflib_register(if_ctx_t ctx)
+{
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ driver_t *driver = sctx->isc_driver;
+ device_t dev = ctx->ifc_dev;
+ if_t ifp;
+
+ _iflib_assert(sctx);
+
+ CTX_LOCK_INIT(ctx);
+ STATE_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev));
+ ifp = ctx->ifc_ifp = if_alloc(IFT_ETHER);
+ if (ifp == NULL) {
+ device_printf(dev, "can not allocate ifnet structure\n");
+ return (ENOMEM);
+ }
+
+ /*
+ * Initialize our context's device specific methods
+ */
+ kobj_init((kobj_t) ctx, (kobj_class_t) driver);
+ kobj_class_compile((kobj_class_t) driver);
+
+ if_initname(ifp, device_get_name(dev), device_get_unit(dev));
+ if_setsoftc(ifp, ctx);
+ if_setdev(ifp, dev);
+ if_setinitfn(ifp, iflib_if_init);
+ if_setioctlfn(ifp, iflib_if_ioctl);
+#ifdef ALTQ
+ if_setstartfn(ifp, iflib_altq_if_start);
+ if_settransmitfn(ifp, iflib_altq_if_transmit);
+ if_setsendqready(ifp);
+#else
+ if_settransmitfn(ifp, iflib_if_transmit);
+#endif
+ if_setqflushfn(ifp, iflib_if_qflush);
+ if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
+
+ ctx->ifc_vlan_attach_event =
+ EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx,
+ EVENTHANDLER_PRI_FIRST);
+ ctx->ifc_vlan_detach_event =
+ EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx,
+ EVENTHANDLER_PRI_FIRST);
+
+ ifmedia_init(&ctx->ifc_media, IFM_IMASK,
+ iflib_media_change, iflib_media_status);
+
+ return (0);
+}
+
+static void
+iflib_deregister(if_ctx_t ctx)
+{
+ if_t ifp = ctx->ifc_ifp;
+
+ /* Remove all media */
+ ifmedia_removeall(&ctx->ifc_media);
+
+ /* Unregister VLAN events */
+ if (ctx->ifc_vlan_attach_event != NULL) {
+ EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event);
+ ctx->ifc_vlan_attach_event = NULL;
+ }
+ if (ctx->ifc_vlan_detach_event != NULL) {
+ EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event);
+ ctx->ifc_vlan_detach_event = NULL;
+ }
+
+ /* Release kobject reference */
+ kobj_delete((kobj_t) ctx, NULL);
+
+ /* Free the ifnet structure */
+ if_free(ifp);
+
+ STATE_LOCK_DESTROY(ctx);
+
+ /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
+ CTX_LOCK_DESTROY(ctx);
+}
+
+static int
+iflib_queues_alloc(if_ctx_t ctx)
+{
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ device_t dev = ctx->ifc_dev;
+ int nrxqsets = scctx->isc_nrxqsets;
+ int ntxqsets = scctx->isc_ntxqsets;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ iflib_fl_t fl = NULL;
+ int i, j, cpu, err, txconf, rxconf;
+ iflib_dma_info_t ifdip;
+ uint32_t *rxqsizes = scctx->isc_rxqsizes;
+ uint32_t *txqsizes = scctx->isc_txqsizes;
+ uint8_t nrxqs = sctx->isc_nrxqs;
+ uint8_t ntxqs = sctx->isc_ntxqs;
+ int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1;
+ caddr_t *vaddrs;
+ uint64_t *paddrs;
+
+ KASSERT(ntxqs > 0, ("number of queues per qset must be at least 1"));
+ KASSERT(nrxqs > 0, ("number of queues per qset must be at least 1"));
+
+ /* Allocate the TX ring struct memory */
+ if (!(ctx->ifc_txqs =
+ (iflib_txq_t) malloc(sizeof(struct iflib_txq) *
+ ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate TX ring memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /* Now allocate the RX */
+ if (!(ctx->ifc_rxqs =
+ (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) *
+ nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate RX ring memory\n");
+ err = ENOMEM;
+ goto rx_fail;
+ }
+
+ txq = ctx->ifc_txqs;
+ rxq = ctx->ifc_rxqs;
+
+ /*
+ * XXX handle allocation failure
+ */
+ for (txconf = i = 0, cpu = CPU_FIRST(); i < ntxqsets; i++, txconf++, txq++, cpu = CPU_NEXT(cpu)) {
+ /* Set up some basics */
+
+ if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs,
+ M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
+ device_printf(dev,
+ "Unable to allocate TX DMA info memory\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+ txq->ift_ifdi = ifdip;
+ for (j = 0; j < ntxqs; j++, ifdip++) {
+ if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, 0)) {
+ device_printf(dev,
+ "Unable to allocate TX descriptors\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+ txq->ift_txd_size[j] = scctx->isc_txd_size[j];
+ bzero((void *)ifdip->idi_vaddr, txqsizes[j]);
+ }
+ txq->ift_ctx = ctx;
+ txq->ift_id = i;
+ if (sctx->isc_flags & IFLIB_HAS_TXCQ) {
+ txq->ift_br_offset = 1;
+ } else {
+ txq->ift_br_offset = 0;
+ }
+ /* XXX fix this */
+ txq->ift_timer.c_cpu = cpu;
+
+ if (iflib_txsd_alloc(txq)) {
+ device_printf(dev, "Critical Failure setting up TX buffers\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+
+ /* Initialize the TX lock */
+ snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:TX(%d):callout",
+ device_get_nameunit(dev), txq->ift_id);
+ mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF);
+ callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0);
+
+ err = ifmp_ring_alloc(&txq->ift_br, 2048, txq, iflib_txq_drain,
+ iflib_txq_can_drain, M_IFLIB, M_WAITOK);
+ if (err) {
+ /* XXX free any allocated rings */
+ device_printf(dev, "Unable to allocate buf_ring\n");
+ goto err_tx_desc;
+ }
+ }
+
+ for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) {
+ /* Set up some basics */
+
+ if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs,
+ M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
+ device_printf(dev,
+ "Unable to allocate RX DMA info memory\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+
+ rxq->ifr_ifdi = ifdip;
+ /* XXX this needs to be changed if #rx queues != #tx queues */
+ rxq->ifr_ntxqirq = 1;
+ rxq->ifr_txqid[0] = i;
+ for (j = 0; j < nrxqs; j++, ifdip++) {
+ if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, 0)) {
+ device_printf(dev,
+ "Unable to allocate RX descriptors\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+ bzero((void *)ifdip->idi_vaddr, rxqsizes[j]);
+ }
+ rxq->ifr_ctx = ctx;
+ rxq->ifr_id = i;
+ if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
+ rxq->ifr_fl_offset = 1;
+ } else {
+ rxq->ifr_fl_offset = 0;
+ }
+ rxq->ifr_nfl = nfree_lists;
+ if (!(fl =
+ (iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate free list memory\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+ rxq->ifr_fl = fl;
+ for (j = 0; j < nfree_lists; j++) {
+ fl[j].ifl_rxq = rxq;
+ fl[j].ifl_id = j;
+ fl[j].ifl_ifdi = &rxq->ifr_ifdi[j + rxq->ifr_fl_offset];
+ fl[j].ifl_rxd_size = scctx->isc_rxd_size[j];
+ }
+ /* Allocate receive buffers for the ring */
+ if (iflib_rxsd_alloc(rxq)) {
+ device_printf(dev,
+ "Critical Failure setting up receive buffers\n");
+ err = ENOMEM;
+ goto err_rx_desc;
+ }
+
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
+ fl->ifl_rx_bitmap = bit_alloc(fl->ifl_size, M_IFLIB,
+ M_WAITOK);
+ }
+
+ /* TXQs */
+ vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK);
+ paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK);
+ for (i = 0; i < ntxqsets; i++) {
+ iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi;
+
+ for (j = 0; j < ntxqs; j++, di++) {
+ vaddrs[i*ntxqs + j] = di->idi_vaddr;
+ paddrs[i*ntxqs + j] = di->idi_paddr;
+ }
+ }
+ if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) {
+ device_printf(ctx->ifc_dev,
+ "Unable to allocate device TX queue\n");
+ iflib_tx_structures_free(ctx);
+ free(vaddrs, M_IFLIB);
+ free(paddrs, M_IFLIB);
+ goto err_rx_desc;
+ }
+ free(vaddrs, M_IFLIB);
+ free(paddrs, M_IFLIB);
+
+ /* RXQs */
+ vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK);
+ paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK);
+ for (i = 0; i < nrxqsets; i++) {
+ iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi;
+
+ for (j = 0; j < nrxqs; j++, di++) {
+ vaddrs[i*nrxqs + j] = di->idi_vaddr;
+ paddrs[i*nrxqs + j] = di->idi_paddr;
+ }
+ }
+ if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) {
+ device_printf(ctx->ifc_dev,
+ "Unable to allocate device RX queue\n");
+ iflib_tx_structures_free(ctx);
+ free(vaddrs, M_IFLIB);
+ free(paddrs, M_IFLIB);
+ goto err_rx_desc;
+ }
+ free(vaddrs, M_IFLIB);
+ free(paddrs, M_IFLIB);
+
+ return (0);
+
+/* XXX handle allocation failure changes */
+err_rx_desc:
+err_tx_desc:
+rx_fail:
+ if (ctx->ifc_rxqs != NULL)
+ free(ctx->ifc_rxqs, M_IFLIB);
+ ctx->ifc_rxqs = NULL;
+ if (ctx->ifc_txqs != NULL)
+ free(ctx->ifc_txqs, M_IFLIB);
+ ctx->ifc_txqs = NULL;
+fail:
+ return (err);
+}
+
+static int
+iflib_tx_structures_setup(if_ctx_t ctx)
+{
+ iflib_txq_t txq = ctx->ifc_txqs;
+ int i;
+
+ for (i = 0; i < NTXQSETS(ctx); i++, txq++)
+ iflib_txq_setup(txq);
+
+ return (0);
+}
+
+static void
+iflib_tx_structures_free(if_ctx_t ctx)
+{
+ iflib_txq_t txq = ctx->ifc_txqs;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ int i, j;
+
+ for (i = 0; i < NTXQSETS(ctx); i++, txq++) {
+ iflib_txq_destroy(txq);
+ for (j = 0; j < sctx->isc_ntxqs; j++)
+ iflib_dma_free(&txq->ift_ifdi[j]);
+ }
+ free(ctx->ifc_txqs, M_IFLIB);
+ ctx->ifc_txqs = NULL;
+ IFDI_QUEUES_FREE(ctx);
+}
+
+/*********************************************************************
+ *
+ * Initialize all receive rings.
+ *
+ **********************************************************************/
+static int
+iflib_rx_structures_setup(if_ctx_t ctx)
+{
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ int q;
+#if defined(INET6) || defined(INET)
+ int err, i;
+#endif
+
+ for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) {
+#if defined(INET6) || defined(INET)
+ if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO) {
+ err = tcp_lro_init_args(&rxq->ifr_lc, ctx->ifc_ifp,
+ TCP_LRO_ENTRIES, min(1024,
+ ctx->ifc_softc_ctx.isc_nrxd[rxq->ifr_fl_offset]));
+ if (err != 0) {
+ device_printf(ctx->ifc_dev,
+ "LRO Initialization failed!\n");
+ goto fail;
+ }
+ }
+#endif
+ IFDI_RXQ_SETUP(ctx, rxq->ifr_id);
+ }
+ return (0);
+#if defined(INET6) || defined(INET)
+fail:
+ /*
+ * Free LRO resources allocated so far, we will only handle
+ * the rings that completed, the failing case will have
+ * cleaned up for itself. 'q' failed, so its the terminus.
+ */
+ rxq = ctx->ifc_rxqs;
+ for (i = 0; i < q; ++i, rxq++) {
+ if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO)
+ tcp_lro_free(&rxq->ifr_lc);
+ }
+ return (err);
+#endif
+}
+
+/*********************************************************************
+ *
+ * Free all receive rings.
+ *
+ **********************************************************************/
+static void
+iflib_rx_structures_free(if_ctx_t ctx)
+{
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ int i;
+
+ for (i = 0; i < ctx->ifc_softc_ctx.isc_nrxqsets; i++, rxq++) {
+ iflib_rx_sds_free(rxq);
+#if defined(INET6) || defined(INET)
+ if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO)
+ tcp_lro_free(&rxq->ifr_lc);
+#endif
+ }
+ free(ctx->ifc_rxqs, M_IFLIB);
+ ctx->ifc_rxqs = NULL;
+}
+
+static int
+iflib_qset_structures_setup(if_ctx_t ctx)
+{
+ int err;
+
+ /*
+ * It is expected that the caller takes care of freeing queues if this
+ * fails.
+ */
+ if ((err = iflib_tx_structures_setup(ctx)) != 0) {
+ device_printf(ctx->ifc_dev, "iflib_tx_structures_setup failed: %d\n", err);
+ return (err);
+ }
+
+ if ((err = iflib_rx_structures_setup(ctx)) != 0)
+ device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err);
+
+ return (err);
+}
+
+int
+iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
+ driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, const char *name)
+{
+
+ return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name));
+}
+
+#ifdef SMP
+static int
+find_nth(if_ctx_t ctx, int qid)
+{
+ cpuset_t cpus;
+ int i, cpuid, eqid, count;
+
+ CPU_COPY(&ctx->ifc_cpus, &cpus);
+ count = CPU_COUNT(&cpus);
+ eqid = qid % count;
+ /* clear up to the qid'th bit */
+ for (i = 0; i < eqid; i++) {
+ cpuid = CPU_FFS(&cpus);
+ MPASS(cpuid != 0);
+ CPU_CLR(cpuid-1, &cpus);
+ }
+ cpuid = CPU_FFS(&cpus);
+ MPASS(cpuid != 0);
+ return (cpuid-1);
+}
+
+#ifdef SCHED_ULE
+extern struct cpu_group *cpu_top; /* CPU topology */
+
+static int
+find_child_with_core(int cpu, struct cpu_group *grp)
+{
+ int i;
+
+ if (grp->cg_children == 0)
+ return -1;
+
+ MPASS(grp->cg_child);
+ for (i = 0; i < grp->cg_children; i++) {
+ if (CPU_ISSET(cpu, &grp->cg_child[i].cg_mask))
+ return i;
+ }
+
+ return -1;
+}
+
+/*
+ * Find the nth "close" core to the specified core
+ * "close" is defined as the deepest level that shares
+ * at least an L2 cache. With threads, this will be
+ * threads on the same core. If the shared cache is L3
+ * or higher, simply returns the same core.
+ */
+static int
+find_close_core(int cpu, int core_offset)
+{
+ struct cpu_group *grp;
+ int i;
+ int fcpu;
+ cpuset_t cs;
+
+ grp = cpu_top;
+ if (grp == NULL)
+ return cpu;
+ i = 0;
+ while ((i = find_child_with_core(cpu, grp)) != -1) {
+ /* If the child only has one cpu, don't descend */
+ if (grp->cg_child[i].cg_count <= 1)
+ break;
+ grp = &grp->cg_child[i];
+ }
+
+ /* If they don't share at least an L2 cache, use the same CPU */
+ if (grp->cg_level > CG_SHARE_L2 || grp->cg_level == CG_SHARE_NONE)
+ return cpu;
+
+ /* Now pick one */
+ CPU_COPY(&grp->cg_mask, &cs);
+
+ /* Add the selected CPU offset to core offset. */
+ for (i = 0; (fcpu = CPU_FFS(&cs)) != 0; i++) {
+ if (fcpu - 1 == cpu)
+ break;
+ CPU_CLR(fcpu - 1, &cs);
+ }
+ MPASS(fcpu);
+
+ core_offset += i;
+
+ CPU_COPY(&grp->cg_mask, &cs);
+ for (i = core_offset % grp->cg_count; i > 0; i--) {
+ MPASS(CPU_FFS(&cs));
+ CPU_CLR(CPU_FFS(&cs) - 1, &cs);
+ }
+ MPASS(CPU_FFS(&cs));
+ return CPU_FFS(&cs) - 1;
+}
+#else
+static int
+find_close_core(int cpu, int core_offset __unused)
+{
+ return cpu;
+}
+#endif
+
+static int
+get_core_offset(if_ctx_t ctx, iflib_intr_type_t type, int qid)
+{
+ switch (type) {
+ case IFLIB_INTR_TX:
+ /* TX queues get cores which share at least an L2 cache with the corresponding RX queue */
+ /* XXX handle multiple RX threads per core and more than two core per L2 group */
+ return qid / CPU_COUNT(&ctx->ifc_cpus) + 1;
+ case IFLIB_INTR_RX:
+ case IFLIB_INTR_RXTX:
+ /* RX queues get the specified core */
+ return qid / CPU_COUNT(&ctx->ifc_cpus);
+ default:
+ return -1;
+ }
+}
+#else
+#define get_core_offset(ctx, type, qid) CPU_FIRST()
+#define find_close_core(cpuid, tid) CPU_FIRST()
+#define find_nth(ctx, gid) CPU_FIRST()
+#endif
+
+/* Just to avoid copy/paste */
+static inline int
+iflib_irq_set_affinity(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type,
+ int qid, struct grouptask *gtask, struct taskqgroup *tqg, void *uniq,
+ const char *name)
+{
+ device_t dev;
+ int co, cpuid, err, tid;
+
+ dev = ctx->ifc_dev;
+ co = ctx->ifc_sysctl_core_offset;
+ if (ctx->ifc_sysctl_separate_txrx && type == IFLIB_INTR_TX)
+ co += ctx->ifc_softc_ctx.isc_nrxqsets;
+ cpuid = find_nth(ctx, qid + co);
+ tid = get_core_offset(ctx, type, qid);
+ if (tid < 0) {
+ device_printf(dev, "get_core_offset failed\n");
+ return (EOPNOTSUPP);
+ }
+ cpuid = find_close_core(cpuid, tid);
+ err = taskqgroup_attach_cpu(tqg, gtask, uniq, cpuid,
+ rman_get_start(irq->ii_res), name);
+ if (err) {
+ device_printf(dev, "taskqgroup_attach_cpu failed %d\n", err);
+ return (err);
+ }
+#ifdef notyet
+ if (cpuid > ctx->ifc_cpuid_highest)
+ ctx->ifc_cpuid_highest = cpuid;
+#endif
+ return (0);
+}
+
+int
+iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
+ iflib_intr_type_t type, driver_filter_t *filter,
+ void *filter_arg, int qid, const char *name)
+{
+ device_t dev;
+ struct grouptask *gtask;
+ struct taskqgroup *tqg;
+ iflib_filter_info_t info;
+ gtask_fn_t *fn;
+ int tqrid, err;
+ driver_filter_t *intr_fast;
+ void *q;
+
+ info = &ctx->ifc_filter_info;
+ tqrid = rid;
+
+ switch (type) {
+ /* XXX merge tx/rx for netmap? */
+ case IFLIB_INTR_TX:
+ q = &ctx->ifc_txqs[qid];
+ info = &ctx->ifc_txqs[qid].ift_filter_info;
+ gtask = &ctx->ifc_txqs[qid].ift_task;
+ tqg = qgroup_if_io_tqg;
+ fn = _task_fn_tx;
+ intr_fast = iflib_fast_intr;
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ ctx->ifc_flags |= IFC_NETMAP_TX_IRQ;
+ break;
+ case IFLIB_INTR_RX:
+ q = &ctx->ifc_rxqs[qid];
+ info = &ctx->ifc_rxqs[qid].ifr_filter_info;
+ gtask = &ctx->ifc_rxqs[qid].ifr_task;
+ tqg = qgroup_if_io_tqg;
+ fn = _task_fn_rx;
+ intr_fast = iflib_fast_intr;
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ break;
+ case IFLIB_INTR_RXTX:
+ q = &ctx->ifc_rxqs[qid];
+ info = &ctx->ifc_rxqs[qid].ifr_filter_info;
+ gtask = &ctx->ifc_rxqs[qid].ifr_task;
+ tqg = qgroup_if_io_tqg;
+ fn = _task_fn_rx;
+ intr_fast = iflib_fast_intr_rxtx;
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ break;
+ case IFLIB_INTR_ADMIN:
+ q = ctx;
+ tqrid = -1;
+ info = &ctx->ifc_filter_info;
+ gtask = &ctx->ifc_admin_task;
+ tqg = qgroup_if_config_tqg;
+ fn = _task_fn_admin;
+ intr_fast = iflib_fast_intr_ctx;
+ break;
+ default:
+ device_printf(ctx->ifc_dev, "%s: unknown net intr type\n",
+ __func__);
+ return (EINVAL);
+ }
+
+ info->ifi_filter = filter;
+ info->ifi_filter_arg = filter_arg;
+ info->ifi_task = gtask;
+ info->ifi_ctx = q;
+
+ dev = ctx->ifc_dev;
+ err = _iflib_irq_alloc(ctx, irq, rid, intr_fast, NULL, info, name);
+ if (err != 0) {
+ device_printf(dev, "_iflib_irq_alloc failed %d\n", err);
+ return (err);
+ }
+ if (type == IFLIB_INTR_ADMIN)
+ return (0);
+
+ if (tqrid != -1) {
+ err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg,
+ q, name);
+ if (err)
+ return (err);
+ } else {
+ taskqgroup_attach(tqg, gtask, q, rman_get_start(irq->ii_res),
+ name);
+ }
+
+ return (0);
+}
+
+void
+iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type, void *arg, int qid, const char *name)
+{
+ struct grouptask *gtask;
+ struct taskqgroup *tqg;
+ gtask_fn_t *fn;
+ void *q;
+ int err;
+
+ switch (type) {
+ case IFLIB_INTR_TX:
+ q = &ctx->ifc_txqs[qid];
+ gtask = &ctx->ifc_txqs[qid].ift_task;
+ tqg = qgroup_if_io_tqg;
+ fn = _task_fn_tx;
+ break;
+ case IFLIB_INTR_RX:
+ q = &ctx->ifc_rxqs[qid];
+ gtask = &ctx->ifc_rxqs[qid].ifr_task;
+ tqg = qgroup_if_io_tqg;
+ fn = _task_fn_rx;
+ break;
+ case IFLIB_INTR_IOV:
+ q = ctx;
+ gtask = &ctx->ifc_vflr_task;
+ tqg = qgroup_if_config_tqg;
+ fn = _task_fn_iov;
+ break;
+ default:
+ panic("unknown net intr type");
+ }
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ if (irq != NULL) {
+ err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg,
+ q, name);
+ if (err)
+ taskqgroup_attach(tqg, gtask, q,
+ rman_get_start(irq->ii_res), name);
+ } else {
+ taskqgroup_attach(tqg, gtask, q, -1, name);
+ }
+}
+
+void
+iflib_irq_free(if_ctx_t ctx, if_irq_t irq)
+{
+
+ if (irq->ii_tag)
+ bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag);
+
+ if (irq->ii_res)
+ bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ,
+ rman_get_rid(irq->ii_res), irq->ii_res);
+}
+
+static int
+iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, const char *name)
+{
+ iflib_txq_t txq = ctx->ifc_txqs;
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ if_irq_t irq = &ctx->ifc_legacy_irq;
+ iflib_filter_info_t info;
+ struct grouptask *gtask;
+ struct taskqgroup *tqg;
+ gtask_fn_t *fn;
+ int tqrid;
+ void *q;
+ int err;
+
+ q = &ctx->ifc_rxqs[0];
+ info = &rxq[0].ifr_filter_info;
+ gtask = &rxq[0].ifr_task;
+ tqg = qgroup_if_io_tqg;
+ tqrid = irq->ii_rid = *rid;
+ fn = _task_fn_rx;
+
+ ctx->ifc_flags |= IFC_LEGACY;
+ info->ifi_filter = filter;
+ info->ifi_filter_arg = filter_arg;
+ info->ifi_task = gtask;
+ info->ifi_ctx = q;
+
+ /* We allocate a single interrupt resource */
+ if ((err = _iflib_irq_alloc(ctx, irq, tqrid, iflib_fast_intr_rxtx,
+ NULL, info, name)) != 0)
+ return (err);
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ taskqgroup_attach(tqg, gtask, q, rman_get_start(irq->ii_res), name);
+
+ GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq);
+ taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq,
+ rman_get_start(irq->ii_res), "tx");
+ return (0);
+}
+
+void
+iflib_led_create(if_ctx_t ctx)
+{
+
+ ctx->ifc_led_dev = led_create(iflib_led_func, ctx,
+ device_get_nameunit(ctx->ifc_dev));
+}
+
+void
+iflib_tx_intr_deferred(if_ctx_t ctx, int txqid)
+{
+
+ GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task);
+}
+
+void
+iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid)
+{
+
+ GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task);
+}
+
+void
+iflib_admin_intr_deferred(if_ctx_t ctx)
+{
+#ifdef INVARIANTS
+ struct grouptask *gtask;
+
+ gtask = &ctx->ifc_admin_task;
+ MPASS(gtask != NULL && gtask->gt_taskqueue != NULL);
+#endif
+
+ GROUPTASK_ENQUEUE(&ctx->ifc_admin_task);
+}
+
+void
+iflib_iov_intr_deferred(if_ctx_t ctx)
+{
+
+ GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task);
+}
+
+void
+iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name)
+{
+
+ taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, -1, name);
+}
+
+void
+iflib_config_gtask_init(void *ctx, struct grouptask *gtask, gtask_fn_t *fn,
+ const char *name)
+{
+
+ GROUPTASK_INIT(gtask, 0, fn, ctx);
+ taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, -1, name);
+}
+
+void
+iflib_config_gtask_deinit(struct grouptask *gtask)
+{
+
+ taskqgroup_detach(qgroup_if_config_tqg, gtask);
+}
+
+void
+iflib_link_state_change(if_ctx_t ctx, int link_state, uint64_t baudrate)
+{
+ if_t ifp = ctx->ifc_ifp;
+ iflib_txq_t txq = ctx->ifc_txqs;
+
+ if_setbaudrate(ifp, baudrate);
+ if (baudrate >= IF_Gbps(10)) {
+ STATE_LOCK(ctx);
+ ctx->ifc_flags |= IFC_PREFETCH;
+ STATE_UNLOCK(ctx);
+ }
+ /* If link down, disable watchdog */
+ if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) {
+ for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++)
+ txq->ift_qstatus = IFLIB_QUEUE_IDLE;
+ }
+ ctx->ifc_link_state = link_state;
+ if_link_state_change(ifp, link_state);
+}
+
+static int
+iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq)
+{
+ int credits;
+#ifdef INVARIANTS
+ int credits_pre = txq->ift_cidx_processed;
+#endif
+
+ if (ctx->isc_txd_credits_update == NULL)
+ return (0);
+
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD);
+ if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, true)) == 0)
+ return (0);
+
+ txq->ift_processed += credits;
+ txq->ift_cidx_processed += credits;
+
+ MPASS(credits_pre + credits == txq->ift_cidx_processed);
+ if (txq->ift_cidx_processed >= txq->ift_size)
+ txq->ift_cidx_processed -= txq->ift_size;
+ return (credits);
+}
+
+static int
+iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget)
+{
+ iflib_fl_t fl;
+ u_int i;
+
+ for (i = 0, fl = &rxq->ifr_fl[0]; i < rxq->ifr_nfl; i++, fl++)
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+ return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx,
+ budget));
+}
+
+void
+iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name,
+ const char *description, if_int_delay_info_t info,
+ int offset, int value)
+{
+ info->iidi_ctx = ctx;
+ info->iidi_offset = offset;
+ info->iidi_value = value;
+ SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev),
+ SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)),
+ OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW,
+ info, 0, iflib_sysctl_int_delay, "I", description);
+}
+
+struct sx *
+iflib_ctx_lock_get(if_ctx_t ctx)
+{
+
+ return (&ctx->ifc_ctx_sx);
+}
+
+static int
+iflib_msix_init(if_ctx_t ctx)
+{
+ device_t dev = ctx->ifc_dev;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ int admincnt, bar, err, iflib_num_rx_queues, iflib_num_tx_queues;
+ int msgs, queuemsgs, queues, rx_queues, tx_queues, vectors;
+
+ iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs;
+ iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs;
+
+ if (bootverbose)
+ device_printf(dev, "msix_init qsets capped at %d\n",
+ imax(scctx->isc_ntxqsets, scctx->isc_nrxqsets));
+
+ /* Override by tuneable */
+ if (scctx->isc_disable_msix)
+ goto msi;
+
+ /* First try MSI-X */
+ if ((msgs = pci_msix_count(dev)) == 0) {
+ if (bootverbose)
+ device_printf(dev, "MSI-X not supported or disabled\n");
+ goto msi;
+ }
+
+ bar = ctx->ifc_softc_ctx.isc_msix_bar;
+ /*
+ * bar == -1 => "trust me I know what I'm doing"
+ * Some drivers are for hardware that is so shoddily
+ * documented that no one knows which bars are which
+ * so the developer has to map all bars. This hack
+ * allows shoddy garbage to use MSI-X in this framework.
+ */
+ if (bar != -1) {
+ ctx->ifc_msix_mem = bus_alloc_resource_any(dev,
+ SYS_RES_MEMORY, &bar, RF_ACTIVE);
+ if (ctx->ifc_msix_mem == NULL) {
+ device_printf(dev, "Unable to map MSI-X table\n");
+ goto msi;
+ }
+ }
+
+ admincnt = sctx->isc_admin_intrcnt;
+#if IFLIB_DEBUG
+ /* use only 1 qset in debug mode */
+ queuemsgs = min(msgs - admincnt, 1);
+#else
+ queuemsgs = msgs - admincnt;
+#endif
+#ifdef RSS
+ queues = imin(queuemsgs, rss_getnumbuckets());
+#else
+ queues = queuemsgs;
+#endif
+ queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues);
+ if (bootverbose)
+ device_printf(dev,
+ "intr CPUs: %d queue msgs: %d admincnt: %d\n",
+ CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt);
+#ifdef RSS
+ /* If we're doing RSS, clamp at the number of RSS buckets */
+ if (queues > rss_getnumbuckets())
+ queues = rss_getnumbuckets();
+#endif
+ if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queuemsgs - admincnt)
+ rx_queues = iflib_num_rx_queues;
+ else
+ rx_queues = queues;
+
+ if (rx_queues > scctx->isc_nrxqsets)
+ rx_queues = scctx->isc_nrxqsets;
+
+ /*
+ * We want this to be all logical CPUs by default
+ */
+ if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues)
+ tx_queues = iflib_num_tx_queues;
+ else
+ tx_queues = mp_ncpus;
+
+ if (tx_queues > scctx->isc_ntxqsets)
+ tx_queues = scctx->isc_ntxqsets;
+
+ if (ctx->ifc_sysctl_qs_eq_override == 0) {
+#ifdef INVARIANTS
+ if (tx_queues != rx_queues)
+ device_printf(dev,
+ "queue equality override not set, capping rx_queues at %d and tx_queues at %d\n",
+ min(rx_queues, tx_queues), min(rx_queues, tx_queues));
+#endif
+ tx_queues = min(rx_queues, tx_queues);
+ rx_queues = min(rx_queues, tx_queues);
+ }
+
+ vectors = rx_queues + admincnt;
+ if (msgs < vectors) {
+ device_printf(dev,
+ "insufficient number of MSI-X vectors "
+ "(supported %d, need %d)\n", msgs, vectors);
+ goto msi;
+ }
+
+ device_printf(dev, "Using %d RX queues %d TX queues\n", rx_queues,
+ tx_queues);
+ msgs = vectors;
+ if ((err = pci_alloc_msix(dev, &vectors)) == 0) {
+ if (vectors != msgs) {
+ device_printf(dev,
+ "Unable to allocate sufficient MSI-X vectors "
+ "(got %d, need %d)\n", vectors, msgs);
+ pci_release_msi(dev);
+ if (bar != -1) {
+ bus_release_resource(dev, SYS_RES_MEMORY, bar,
+ ctx->ifc_msix_mem);
+ ctx->ifc_msix_mem = NULL;
+ }
+ goto msi;
+ }
+ device_printf(dev, "Using MSI-X interrupts with %d vectors\n",
+ vectors);
+ scctx->isc_vectors = vectors;
+ scctx->isc_nrxqsets = rx_queues;
+ scctx->isc_ntxqsets = tx_queues;
+ scctx->isc_intr = IFLIB_INTR_MSIX;
+
+ return (vectors);
+ } else {
+ device_printf(dev,
+ "failed to allocate %d MSI-X vectors, err: %d\n", vectors,
+ err);
+ if (bar != -1) {
+ bus_release_resource(dev, SYS_RES_MEMORY, bar,
+ ctx->ifc_msix_mem);
+ ctx->ifc_msix_mem = NULL;
+ }
+ }
+
+msi:
+ vectors = pci_msi_count(dev);
+ scctx->isc_nrxqsets = 1;
+ scctx->isc_ntxqsets = 1;
+ scctx->isc_vectors = vectors;
+ if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) {
+ device_printf(dev,"Using an MSI interrupt\n");
+ scctx->isc_intr = IFLIB_INTR_MSI;
+ } else {
+ scctx->isc_vectors = 1;
+ device_printf(dev,"Using a Legacy interrupt\n");
+ scctx->isc_intr = IFLIB_INTR_LEGACY;
+ }
+
+ return (vectors);
+}
+
+static const char *ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" };
+
+static int
+mp_ring_state_handler(SYSCTL_HANDLER_ARGS)
+{
+ int rc;
+ uint16_t *state = ((uint16_t *)oidp->oid_arg1);
+ struct sbuf *sb;
+ const char *ring_state = "UNKNOWN";
+
+ /* XXX needed ? */
+ rc = sysctl_wire_old_buffer(req, 0);
+ MPASS(rc == 0);
+ if (rc != 0)
+ return (rc);
+ sb = sbuf_new_for_sysctl(NULL, NULL, 80, req);
+ MPASS(sb != NULL);
+ if (sb == NULL)
+ return (ENOMEM);
+ if (state[3] <= 3)
+ ring_state = ring_states[state[3]];
+
+ sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s",
+ state[0], state[1], state[2], ring_state);
+ rc = sbuf_finish(sb);
+ sbuf_delete(sb);
+ return(rc);
+}
+
+enum iflib_ndesc_handler {
+ IFLIB_NTXD_HANDLER,
+ IFLIB_NRXD_HANDLER,
+};
+
+static int
+mp_ndesc_handler(SYSCTL_HANDLER_ARGS)
+{
+ if_ctx_t ctx = (void *)arg1;
+ enum iflib_ndesc_handler type = arg2;
+ char buf[256] = {0};
+ qidx_t *ndesc;
+ char *p, *next;
+ int nqs, rc, i;
+
+ nqs = 8;
+ switch(type) {
+ case IFLIB_NTXD_HANDLER:
+ ndesc = ctx->ifc_sysctl_ntxds;
+ if (ctx->ifc_sctx)
+ nqs = ctx->ifc_sctx->isc_ntxqs;
+ break;
+ case IFLIB_NRXD_HANDLER:
+ ndesc = ctx->ifc_sysctl_nrxds;
+ if (ctx->ifc_sctx)
+ nqs = ctx->ifc_sctx->isc_nrxqs;
+ break;
+ default:
+ printf("%s: unhandled type\n", __func__);
+ return (EINVAL);
+ }
+ if (nqs == 0)
+ nqs = 8;
+
+ for (i=0; i<8; i++) {
+ if (i >= nqs)
+ break;
+ if (i)
+ strcat(buf, ",");
+ sprintf(strchr(buf, 0), "%d", ndesc[i]);
+ }
+
+ rc = sysctl_handle_string(oidp, buf, sizeof(buf), req);
+ if (rc || req->newptr == NULL)
+ return rc;
+
+ for (i = 0, next = buf, p = strsep(&next, " ,"); i < 8 && p;
+ i++, p = strsep(&next, " ,")) {
+ ndesc[i] = strtoul(p, NULL, 10);
+ }
+
+ return(rc);
+}
+
+#define NAME_BUFLEN 32
+static void
+iflib_add_device_sysctl_pre(if_ctx_t ctx)
+{
+ device_t dev = iflib_get_dev(ctx);
+ struct sysctl_oid_list *child, *oid_list;
+ struct sysctl_ctx_list *ctx_list;
+ struct sysctl_oid *node;
+
+ ctx_list = device_get_sysctl_ctx(dev);
+ child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
+ ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib",
+ CTLFLAG_RD, NULL, "IFLIB fields");
+ oid_list = SYSCTL_CHILDREN(node);
+
+ SYSCTL_ADD_CONST_STRING(ctx_list, oid_list, OID_AUTO, "driver_version",
+ CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version,
+ "driver version");
+
+ SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs",
+ CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0,
+ "# of txqs to use, 0 => use default #");
+ SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs",
+ CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxqs, 0,
+ "# of rxqs to use, 0 => use default #");
+ SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable",
+ CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0,
+ "permit #txq != #rxq");
+ SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix",
+ CTLFLAG_RWTUN, &ctx->ifc_softc_ctx.isc_disable_msix, 0,
+ "disable MSI-X (default 0)");
+ SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "rx_budget",
+ CTLFLAG_RWTUN, &ctx->ifc_sysctl_rx_budget, 0,
+ "set the RX budget");
+ SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "tx_abdicate",
+ CTLFLAG_RWTUN, &ctx->ifc_sysctl_tx_abdicate, 0,
+ "cause TX to abdicate instead of running to completion");
+ ctx->ifc_sysctl_core_offset = CORE_OFFSET_UNSPECIFIED;
+ SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "core_offset",
+ CTLFLAG_RDTUN, &ctx->ifc_sysctl_core_offset, 0,
+ "offset to start using cores at");
+ SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "separate_txrx",
+ CTLFLAG_RDTUN, &ctx->ifc_sysctl_separate_txrx, 0,
+ "use separate cores for TX and RX");
+
+ /* XXX change for per-queue sizes */
+ SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds",
+ CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NTXD_HANDLER,
+ mp_ndesc_handler, "A",
+ "list of # of TX descriptors to use, 0 = use default #");
+ SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_nrxds",
+ CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NRXD_HANDLER,
+ mp_ndesc_handler, "A",
+ "list of # of RX descriptors to use, 0 = use default #");
+}
+
+static void
+iflib_add_device_sysctl_post(if_ctx_t ctx)
+{
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ device_t dev = iflib_get_dev(ctx);
+ struct sysctl_oid_list *child;
+ struct sysctl_ctx_list *ctx_list;
+ iflib_fl_t fl;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ int i, j;
+ char namebuf[NAME_BUFLEN];
+ char *qfmt;
+ struct sysctl_oid *queue_node, *fl_node, *node;
+ struct sysctl_oid_list *queue_list, *fl_list;
+ ctx_list = device_get_sysctl_ctx(dev);
+
+ node = ctx->ifc_sysctl_node;
+ child = SYSCTL_CHILDREN(node);
+
+ if (scctx->isc_ntxqsets > 100)
+ qfmt = "txq%03d";
+ else if (scctx->isc_ntxqsets > 10)
+ qfmt = "txq%02d";
+ else
+ qfmt = "txq%d";
+ for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) {
+ snprintf(namebuf, NAME_BUFLEN, qfmt, i);
+ queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
+ CTLFLAG_RD, NULL, "Queue Name");
+ queue_list = SYSCTL_CHILDREN(queue_node);
+#if MEMORY_LOGGING
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued",
+ CTLFLAG_RD,
+ &txq->ift_dequeued, "total mbufs freed");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued",
+ CTLFLAG_RD,
+ &txq->ift_enqueued, "total mbufs enqueued");
+#endif
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag",
+ CTLFLAG_RD,
+ &txq->ift_mbuf_defrag, "# of times m_defrag was called");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups",
+ CTLFLAG_RD,
+ &txq->ift_pullups, "# of times m_pullup was called");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed",
+ CTLFLAG_RD,
+ &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail",
+ CTLFLAG_RD,
+ &txq->ift_no_desc_avail, "# of times no descriptors were available");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed",
+ CTLFLAG_RD,
+ &txq->ift_map_failed, "# of times DMA map failed");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig",
+ CTLFLAG_RD,
+ &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup",
+ CTLFLAG_RD,
+ &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG");
+ SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx",
+ CTLFLAG_RD,
+ &txq->ift_pidx, 1, "Producer Index");
+ SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx",
+ CTLFLAG_RD,
+ &txq->ift_cidx, 1, "Consumer Index");
+ SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed",
+ CTLFLAG_RD,
+ &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update");
+ SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use",
+ CTLFLAG_RD,
+ &txq->ift_in_use, 1, "descriptors in use");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed",
+ CTLFLAG_RD,
+ &txq->ift_processed, "descriptors procesed for clean");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned",
+ CTLFLAG_RD,
+ &txq->ift_cleaned, "total cleaned");
+ SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state",
+ CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br->state),
+ 0, mp_ring_state_handler, "A", "soft ring state");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues",
+ CTLFLAG_RD, &txq->ift_br->enqueues,
+ "# of enqueues to the mp_ring for this queue");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops",
+ CTLFLAG_RD, &txq->ift_br->drops,
+ "# of drops in the mp_ring for this queue");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts",
+ CTLFLAG_RD, &txq->ift_br->starts,
+ "# of normal consumer starts in the mp_ring for this queue");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls",
+ CTLFLAG_RD, &txq->ift_br->stalls,
+ "# of consumer stalls in the mp_ring for this queue");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts",
+ CTLFLAG_RD, &txq->ift_br->restarts,
+ "# of consumer restarts in the mp_ring for this queue");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications",
+ CTLFLAG_RD, &txq->ift_br->abdications,
+ "# of consumer abdications in the mp_ring for this queue");
+ }
+
+ if (scctx->isc_nrxqsets > 100)
+ qfmt = "rxq%03d";
+ else if (scctx->isc_nrxqsets > 10)
+ qfmt = "rxq%02d";
+ else
+ qfmt = "rxq%d";
+ for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) {
+ snprintf(namebuf, NAME_BUFLEN, qfmt, i);
+ queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
+ CTLFLAG_RD, NULL, "Queue Name");
+ queue_list = SYSCTL_CHILDREN(queue_node);
+ if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
+ SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx",
+ CTLFLAG_RD,
+ &rxq->ifr_cq_cidx, 1, "Consumer Index");
+ }
+
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
+ snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j);
+ fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf,
+ CTLFLAG_RD, NULL, "freelist Name");
+ fl_list = SYSCTL_CHILDREN(fl_node);
+ SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx",
+ CTLFLAG_RD,
+ &fl->ifl_pidx, 1, "Producer Index");
+ SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx",
+ CTLFLAG_RD,
+ &fl->ifl_cidx, 1, "Consumer Index");
+ SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits",
+ CTLFLAG_RD,
+ &fl->ifl_credits, 1, "credits available");
+#if MEMORY_LOGGING
+ SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued",
+ CTLFLAG_RD,
+ &fl->ifl_m_enqueued, "mbufs allocated");
+ SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued",
+ CTLFLAG_RD,
+ &fl->ifl_m_dequeued, "mbufs freed");
+ SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued",
+ CTLFLAG_RD,
+ &fl->ifl_cl_enqueued, "clusters allocated");
+ SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued",
+ CTLFLAG_RD,
+ &fl->ifl_cl_dequeued, "clusters freed");
+#endif
+
+ }
+ }
+
+}
+
+void
+iflib_request_reset(if_ctx_t ctx)
+{
+
+ STATE_LOCK(ctx);
+ ctx->ifc_flags |= IFC_DO_RESET;
+ STATE_UNLOCK(ctx);
+}
+
+#ifndef __NO_STRICT_ALIGNMENT
+static struct mbuf *
+iflib_fixup_rx(struct mbuf *m)
+{
+ struct mbuf *n;
+
+ if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN)) {
+ bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len);
+ m->m_data += ETHER_HDR_LEN;
+ n = m;
+ } else {
+ MGETHDR(n, M_NOWAIT, MT_DATA);
+ if (n == NULL) {
+ m_freem(m);
+ return (NULL);
+ }
+ bcopy(m->m_data, n->m_data, ETHER_HDR_LEN);
+ m->m_data += ETHER_HDR_LEN;
+ m->m_len -= ETHER_HDR_LEN;
+ n->m_len = ETHER_HDR_LEN;
+ M_MOVE_PKTHDR(n, m);
+ n->m_next = m;
+ }
+ return (n);
+}
+#endif
+
+#ifdef NETDUMP
+static void
+iflib_netdump_init(if_t ifp, int *nrxr, int *ncl, int *clsize)
+{
+ if_ctx_t ctx;
+
+ ctx = if_getsoftc(ifp);
+ CTX_LOCK(ctx);
+ *nrxr = NRXQSETS(ctx);
+ *ncl = ctx->ifc_rxqs[0].ifr_fl->ifl_size;
+ *clsize = ctx->ifc_rxqs[0].ifr_fl->ifl_buf_size;
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_netdump_event(if_t ifp, enum netdump_ev event)
+{
+ if_ctx_t ctx;
+ if_softc_ctx_t scctx;
+ iflib_fl_t fl;
+ iflib_rxq_t rxq;
+ int i, j;
+
+ ctx = if_getsoftc(ifp);
+ scctx = &ctx->ifc_softc_ctx;
+
+ switch (event) {
+ case NETDUMP_START:
+ for (i = 0; i < scctx->isc_nrxqsets; i++) {
+ rxq = &ctx->ifc_rxqs[i];
+ for (j = 0; j < rxq->ifr_nfl; j++) {
+ fl = rxq->ifr_fl;
+ fl->ifl_zone = m_getzone(fl->ifl_buf_size);
+ }
+ }
+ iflib_no_tx_batch = 1;
+ break;
+ default:
+ break;
+ }
+}
+
+static int
+iflib_netdump_transmit(if_t ifp, struct mbuf *m)
+{
+ if_ctx_t ctx;
+ iflib_txq_t txq;
+ int error;
+
+ ctx = if_getsoftc(ifp);
+ if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
+ IFF_DRV_RUNNING)
+ return (EBUSY);
+
+ txq = &ctx->ifc_txqs[0];
+ error = iflib_encap(txq, &m);
+ if (error == 0)
+ (void)iflib_txd_db_check(ctx, txq, true, txq->ift_in_use);
+ return (error);
+}
+
+static int
+iflib_netdump_poll(if_t ifp, int count)
+{
+ if_ctx_t ctx;
+ if_softc_ctx_t scctx;
+ iflib_txq_t txq;
+ int i;
+
+ ctx = if_getsoftc(ifp);
+ scctx = &ctx->ifc_softc_ctx;
+
+ if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
+ IFF_DRV_RUNNING)
+ return (EBUSY);
+
+ txq = &ctx->ifc_txqs[0];
+ (void)iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
+
+ for (i = 0; i < scctx->isc_nrxqsets; i++)
+ (void)iflib_rxeof(&ctx->ifc_rxqs[i], 16 /* XXX */);
+ return (0);
+}
+#endif /* NETDUMP */
diff --git a/freebsd/sys/net/iflib_private.h b/freebsd/sys/net/iflib_private.h
new file mode 100644
index 00000000..341deb43
--- /dev/null
+++ b/freebsd/sys/net/iflib_private.h
@@ -0,0 +1,76 @@
+/*-
+ * Copyright (c) 2018, Matthew Macy (mmacy at freebsd.org)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Neither the name of Matthew Macy nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __NET_IFLIB_PRIVATE_H_
+#define __NET_IFLIB_PRIVATE_H_
+
+
+#define IFC_LEGACY 0x001
+#define IFC_QFLUSH 0x002
+#define IFC_MULTISEG 0x004
+#define IFC_SPARE1 0x008
+#define IFC_SC_ALLOCATED 0x010
+#define IFC_INIT_DONE 0x020
+#define IFC_PREFETCH 0x040
+#define IFC_DO_RESET 0x080
+#define IFC_DO_WATCHDOG 0x100
+#define IFC_CHECK_HUNG 0x200
+#define IFC_PSEUDO 0x400
+#define IFC_IN_DETACH 0x800
+
+#define IFC_NETMAP_TX_IRQ 0x80000000
+
+MALLOC_DECLARE(M_IFLIB);
+
+#define IFLIB_MAX_TX_BYTES (2*1024*1024)
+#define IFLIB_MIN_TX_BYTES (8*1024)
+#define IFLIB_DEFAULT_TX_QDEPTH 2048
+
+
+struct iflib_cloneattach_ctx {
+ struct if_clone *cc_ifc;
+ caddr_t cc_params;
+ const char *cc_name;
+ int cc_len;
+};
+
+extern driver_t iflib_pseudodriver;
+int noop_attach(device_t dev);
+int iflib_pseudo_detach(device_t dev);
+
+int iflib_pseudo_register(device_t dev, if_shared_ctx_t sctx, if_ctx_t *ctxp,
+ struct iflib_cloneattach_ctx *clctx);
+
+int iflib_pseudo_deregister(if_ctx_t ctx);
+
+uint32_t iflib_get_flags(if_ctx_t ctx);
+void iflib_set_detach(if_ctx_t ctx);
+void iflib_stop(if_ctx_t ctx);
+
+#endif
diff --git a/freebsd/sys/net/mp_ring.c b/freebsd/sys/net/mp_ring.c
new file mode 100644
index 00000000..c2a2e9db
--- /dev/null
+++ b/freebsd/sys/net/mp_ring.c
@@ -0,0 +1,554 @@
+#include <machine/rtems-bsd-kernel-space.h>
+
+/*-
+ * Copyright (c) 2014 Chelsio Communications, Inc.
+ * All rights reserved.
+ * Written by: Navdeep Parhar <np at FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/counter.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/malloc.h>
+#include <machine/cpu.h>
+#include <net/mp_ring.h>
+
+union ring_state {
+ struct {
+ uint16_t pidx_head;
+ uint16_t pidx_tail;
+ uint16_t cidx;
+ uint16_t flags;
+ };
+ uint64_t state;
+};
+
+enum {
+ IDLE = 0, /* consumer ran to completion, nothing more to do. */
+ BUSY, /* consumer is running already, or will be shortly. */
+ STALLED, /* consumer stopped due to lack of resources. */
+ ABDICATED, /* consumer stopped even though there was work to be
+ done because it wants another thread to take over. */
+};
+
+static inline uint16_t
+space_available(struct ifmp_ring *r, union ring_state s)
+{
+ uint16_t x = r->size - 1;
+
+ if (s.cidx == s.pidx_head)
+ return (x);
+ else if (s.cidx > s.pidx_head)
+ return (s.cidx - s.pidx_head - 1);
+ else
+ return (x - s.pidx_head + s.cidx);
+}
+
+static inline uint16_t
+increment_idx(struct ifmp_ring *r, uint16_t idx, uint16_t n)
+{
+ int x = r->size - idx;
+
+ MPASS(x > 0);
+ return (x > n ? idx + n : n - x);
+}
+
+/* Consumer is about to update the ring's state to s */
+static inline uint16_t
+state_to_flags(union ring_state s, int abdicate)
+{
+
+ if (s.cidx == s.pidx_tail)
+ return (IDLE);
+ else if (abdicate && s.pidx_tail != s.pidx_head)
+ return (ABDICATED);
+
+ return (BUSY);
+}
+
+#ifdef MP_RING_NO_64BIT_ATOMICS
+static void
+drain_ring_locked(struct ifmp_ring *r, union ring_state os, uint16_t prev, int budget)
+{
+ union ring_state ns;
+ int n, pending, total;
+ uint16_t cidx = os.cidx;
+ uint16_t pidx = os.pidx_tail;
+
+ MPASS(os.flags == BUSY);
+ MPASS(cidx != pidx);
+
+ if (prev == IDLE)
+ counter_u64_add(r->starts, 1);
+ pending = 0;
+ total = 0;
+
+ while (cidx != pidx) {
+
+ /* Items from cidx to pidx are available for consumption. */
+ n = r->drain(r, cidx, pidx);
+ if (n == 0) {
+ os.state = ns.state = r->state;
+ ns.cidx = cidx;
+ ns.flags = STALLED;
+ r->state = ns.state;
+ if (prev != STALLED)
+ counter_u64_add(r->stalls, 1);
+ else if (total > 0) {
+ counter_u64_add(r->restarts, 1);
+ counter_u64_add(r->stalls, 1);
+ }
+ break;
+ }
+ cidx = increment_idx(r, cidx, n);
+ pending += n;
+ total += n;
+
+ /*
+ * We update the cidx only if we've caught up with the pidx, the
+ * real cidx is getting too far ahead of the one visible to
+ * everyone else, or we have exceeded our budget.
+ */
+ if (cidx != pidx && pending < 64 && total < budget)
+ continue;
+
+ os.state = ns.state = r->state;
+ ns.cidx = cidx;
+ ns.flags = state_to_flags(ns, total >= budget);
+ r->state = ns.state;
+
+ if (ns.flags == ABDICATED)
+ counter_u64_add(r->abdications, 1);
+ if (ns.flags != BUSY) {
+ /* Wrong loop exit if we're going to stall. */
+ MPASS(ns.flags != STALLED);
+ if (prev == STALLED) {
+ MPASS(total > 0);
+ counter_u64_add(r->restarts, 1);
+ }
+ break;
+ }
+
+ /*
+ * The acquire style atomic above guarantees visibility of items
+ * associated with any pidx change that we notice here.
+ */
+ pidx = ns.pidx_tail;
+ pending = 0;
+ }
+}
+#else
+/*
+ * Caller passes in a state, with a guarantee that there is work to do and that
+ * all items up to the pidx_tail in the state are visible.
+ */
+static void
+drain_ring_lockless(struct ifmp_ring *r, union ring_state os, uint16_t prev, int budget)
+{
+ union ring_state ns;
+ int n, pending, total;
+ uint16_t cidx = os.cidx;
+ uint16_t pidx = os.pidx_tail;
+
+ MPASS(os.flags == BUSY);
+ MPASS(cidx != pidx);
+
+ if (prev == IDLE)
+ counter_u64_add(r->starts, 1);
+ pending = 0;
+ total = 0;
+
+ while (cidx != pidx) {
+
+ /* Items from cidx to pidx are available for consumption. */
+ n = r->drain(r, cidx, pidx);
+ if (n == 0) {
+ critical_enter();
+ os.state = r->state;
+ do {
+ ns.state = os.state;
+ ns.cidx = cidx;
+ ns.flags = STALLED;
+ } while (atomic_fcmpset_64(&r->state, &os.state,
+ ns.state) == 0);
+ critical_exit();
+ if (prev != STALLED)
+ counter_u64_add(r->stalls, 1);
+ else if (total > 0) {
+ counter_u64_add(r->restarts, 1);
+ counter_u64_add(r->stalls, 1);
+ }
+ break;
+ }
+ cidx = increment_idx(r, cidx, n);
+ pending += n;
+ total += n;
+
+ /*
+ * We update the cidx only if we've caught up with the pidx, the
+ * real cidx is getting too far ahead of the one visible to
+ * everyone else, or we have exceeded our budget.
+ */
+ if (cidx != pidx && pending < 64 && total < budget)
+ continue;
+ critical_enter();
+ os.state = r->state;
+ do {
+ ns.state = os.state;
+ ns.cidx = cidx;
+ ns.flags = state_to_flags(ns, total >= budget);
+ } while (atomic_fcmpset_acq_64(&r->state, &os.state,
+ ns.state) == 0);
+ critical_exit();
+
+ if (ns.flags == ABDICATED)
+ counter_u64_add(r->abdications, 1);
+ if (ns.flags != BUSY) {
+ /* Wrong loop exit if we're going to stall. */
+ MPASS(ns.flags != STALLED);
+ if (prev == STALLED) {
+ MPASS(total > 0);
+ counter_u64_add(r->restarts, 1);
+ }
+ break;
+ }
+
+ /*
+ * The acquire style atomic above guarantees visibility of items
+ * associated with any pidx change that we notice here.
+ */
+ pidx = ns.pidx_tail;
+ pending = 0;
+ }
+}
+#endif
+
+int
+ifmp_ring_alloc(struct ifmp_ring **pr, int size, void *cookie, mp_ring_drain_t drain,
+ mp_ring_can_drain_t can_drain, struct malloc_type *mt, int flags)
+{
+ struct ifmp_ring *r;
+
+ /* All idx are 16b so size can be 65536 at most */
+ if (pr == NULL || size < 2 || size > 65536 || drain == NULL ||
+ can_drain == NULL)
+ return (EINVAL);
+ *pr = NULL;
+ flags &= M_NOWAIT | M_WAITOK;
+ MPASS(flags != 0);
+
+ r = malloc(__offsetof(struct ifmp_ring, items[size]), mt, flags | M_ZERO);
+ if (r == NULL)
+ return (ENOMEM);
+ r->size = size;
+ r->cookie = cookie;
+ r->mt = mt;
+ r->drain = drain;
+ r->can_drain = can_drain;
+ r->enqueues = counter_u64_alloc(flags);
+ r->drops = counter_u64_alloc(flags);
+ r->starts = counter_u64_alloc(flags);
+ r->stalls = counter_u64_alloc(flags);
+ r->restarts = counter_u64_alloc(flags);
+ r->abdications = counter_u64_alloc(flags);
+ if (r->enqueues == NULL || r->drops == NULL || r->starts == NULL ||
+ r->stalls == NULL || r->restarts == NULL ||
+ r->abdications == NULL) {
+ ifmp_ring_free(r);
+ return (ENOMEM);
+ }
+
+ *pr = r;
+#ifdef MP_RING_NO_64BIT_ATOMICS
+ mtx_init(&r->lock, "mp_ring lock", NULL, MTX_DEF);
+#endif
+ return (0);
+}
+
+void
+ifmp_ring_free(struct ifmp_ring *r)
+{
+
+ if (r == NULL)
+ return;
+
+ if (r->enqueues != NULL)
+ counter_u64_free(r->enqueues);
+ if (r->drops != NULL)
+ counter_u64_free(r->drops);
+ if (r->starts != NULL)
+ counter_u64_free(r->starts);
+ if (r->stalls != NULL)
+ counter_u64_free(r->stalls);
+ if (r->restarts != NULL)
+ counter_u64_free(r->restarts);
+ if (r->abdications != NULL)
+ counter_u64_free(r->abdications);
+
+ free(r, r->mt);
+}
+
+/*
+ * Enqueue n items and maybe drain the ring for some time.
+ *
+ * Returns an errno.
+ */
+#ifdef MP_RING_NO_64BIT_ATOMICS
+int
+ifmp_ring_enqueue(struct ifmp_ring *r, void **items, int n, int budget, int abdicate)
+{
+ union ring_state os, ns;
+ uint16_t pidx_start, pidx_stop;
+ int i;
+
+ MPASS(items != NULL);
+ MPASS(n > 0);
+
+ mtx_lock(&r->lock);
+ /*
+ * Reserve room for the new items. Our reservation, if successful, is
+ * from 'pidx_start' to 'pidx_stop'.
+ */
+ os.state = r->state;
+ if (n >= space_available(r, os)) {
+ counter_u64_add(r->drops, n);
+ MPASS(os.flags != IDLE);
+ mtx_unlock(&r->lock);
+ if (os.flags == STALLED)
+ ifmp_ring_check_drainage(r, 0);
+ return (ENOBUFS);
+ }
+ ns.state = os.state;
+ ns.pidx_head = increment_idx(r, os.pidx_head, n);
+ r->state = ns.state;
+ pidx_start = os.pidx_head;
+ pidx_stop = ns.pidx_head;
+
+ /*
+ * Wait for other producers who got in ahead of us to enqueue their
+ * items, one producer at a time. It is our turn when the ring's
+ * pidx_tail reaches the beginning of our reservation (pidx_start).
+ */
+ while (ns.pidx_tail != pidx_start) {
+ cpu_spinwait();
+ ns.state = r->state;
+ }
+
+ /* Now it is our turn to fill up the area we reserved earlier. */
+ i = pidx_start;
+ do {
+ r->items[i] = *items++;
+ if (__predict_false(++i == r->size))
+ i = 0;
+ } while (i != pidx_stop);
+
+ /*
+ * Update the ring's pidx_tail. The release style atomic guarantees
+ * that the items are visible to any thread that sees the updated pidx.
+ */
+ os.state = ns.state = r->state;
+ ns.pidx_tail = pidx_stop;
+ if (abdicate) {
+ if (os.flags == IDLE)
+ ns.flags = ABDICATED;
+ } else
+ ns.flags = BUSY;
+ r->state = ns.state;
+ counter_u64_add(r->enqueues, n);
+
+ if (!abdicate) {
+ /*
+ * Turn into a consumer if some other thread isn't active as a consumer
+ * already.
+ */
+ if (os.flags != BUSY)
+ drain_ring_locked(r, ns, os.flags, budget);
+ }
+
+ mtx_unlock(&r->lock);
+ return (0);
+}
+#else
+int
+ifmp_ring_enqueue(struct ifmp_ring *r, void **items, int n, int budget, int abdicate)
+{
+ union ring_state os, ns;
+ uint16_t pidx_start, pidx_stop;
+ int i;
+
+ MPASS(items != NULL);
+ MPASS(n > 0);
+
+ /*
+ * Reserve room for the new items. Our reservation, if successful, is
+ * from 'pidx_start' to 'pidx_stop'.
+ */
+ os.state = r->state;
+ for (;;) {
+ if (n >= space_available(r, os)) {
+ counter_u64_add(r->drops, n);
+ MPASS(os.flags != IDLE);
+ if (os.flags == STALLED)
+ ifmp_ring_check_drainage(r, 0);
+ return (ENOBUFS);
+ }
+ ns.state = os.state;
+ ns.pidx_head = increment_idx(r, os.pidx_head, n);
+ critical_enter();
+ if (atomic_fcmpset_64(&r->state, &os.state, ns.state))
+ break;
+ critical_exit();
+ cpu_spinwait();
+ }
+ pidx_start = os.pidx_head;
+ pidx_stop = ns.pidx_head;
+
+ /*
+ * Wait for other producers who got in ahead of us to enqueue their
+ * items, one producer at a time. It is our turn when the ring's
+ * pidx_tail reaches the beginning of our reservation (pidx_start).
+ */
+ while (ns.pidx_tail != pidx_start) {
+ cpu_spinwait();
+ ns.state = r->state;
+ }
+
+ /* Now it is our turn to fill up the area we reserved earlier. */
+ i = pidx_start;
+ do {
+ r->items[i] = *items++;
+ if (__predict_false(++i == r->size))
+ i = 0;
+ } while (i != pidx_stop);
+
+ /*
+ * Update the ring's pidx_tail. The release style atomic guarantees
+ * that the items are visible to any thread that sees the updated pidx.
+ */
+ os.state = r->state;
+ do {
+ ns.state = os.state;
+ ns.pidx_tail = pidx_stop;
+ if (abdicate) {
+ if (os.flags == IDLE)
+ ns.flags = ABDICATED;
+ } else
+ ns.flags = BUSY;
+ } while (atomic_fcmpset_rel_64(&r->state, &os.state, ns.state) == 0);
+ critical_exit();
+ counter_u64_add(r->enqueues, n);
+
+ if (!abdicate) {
+ /*
+ * Turn into a consumer if some other thread isn't active as a consumer
+ * already.
+ */
+ if (os.flags != BUSY)
+ drain_ring_lockless(r, ns, os.flags, budget);
+ }
+
+ return (0);
+}
+#endif
+
+void
+ifmp_ring_check_drainage(struct ifmp_ring *r, int budget)
+{
+ union ring_state os, ns;
+
+ os.state = r->state;
+ if ((os.flags != STALLED && os.flags != ABDICATED) || // Only continue in STALLED and ABDICATED
+ os.pidx_head != os.pidx_tail || // Require work to be available
+ (os.flags != ABDICATED && r->can_drain(r) == 0)) // Can either drain, or everyone left
+ return;
+
+ MPASS(os.cidx != os.pidx_tail); /* implied by STALLED */
+ ns.state = os.state;
+ ns.flags = BUSY;
+
+
+#ifdef MP_RING_NO_64BIT_ATOMICS
+ mtx_lock(&r->lock);
+ if (r->state != os.state) {
+ mtx_unlock(&r->lock);
+ return;
+ }
+ r->state = ns.state;
+ drain_ring_locked(r, ns, os.flags, budget);
+ mtx_unlock(&r->lock);
+#else
+ /*
+ * The acquire style atomic guarantees visibility of items associated
+ * with the pidx that we read here.
+ */
+ if (!atomic_cmpset_acq_64(&r->state, os.state, ns.state))
+ return;
+
+
+ drain_ring_lockless(r, ns, os.flags, budget);
+#endif
+}
+
+void
+ifmp_ring_reset_stats(struct ifmp_ring *r)
+{
+
+ counter_u64_zero(r->enqueues);
+ counter_u64_zero(r->drops);
+ counter_u64_zero(r->starts);
+ counter_u64_zero(r->stalls);
+ counter_u64_zero(r->restarts);
+ counter_u64_zero(r->abdications);
+}
+
+int
+ifmp_ring_is_idle(struct ifmp_ring *r)
+{
+ union ring_state s;
+
+ s.state = r->state;
+ if (s.pidx_head == s.pidx_tail && s.pidx_tail == s.cidx &&
+ s.flags == IDLE)
+ return (1);
+
+ return (0);
+}
+
+int
+ifmp_ring_is_stalled(struct ifmp_ring *r)
+{
+ union ring_state s;
+
+ s.state = r->state;
+ if (s.pidx_head == s.pidx_tail && s.flags == STALLED)
+ return (1);
+
+ return (0);
+}
diff --git a/freebsd/sys/net/mp_ring.h b/freebsd/sys/net/mp_ring.h
new file mode 100644
index 00000000..6dea325d
--- /dev/null
+++ b/freebsd/sys/net/mp_ring.h
@@ -0,0 +1,75 @@
+/*-
+ * Copyright (c) 2014 Chelsio Communications, Inc.
+ * All rights reserved.
+ * Written by: Navdeep Parhar <np at FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef __NET_MP_RING_H
+#define __NET_MP_RING_H
+
+#ifndef _KERNEL
+#error "no user-serviceable parts inside"
+#endif
+
+struct ifmp_ring;
+typedef u_int (*mp_ring_drain_t)(struct ifmp_ring *, u_int, u_int);
+typedef u_int (*mp_ring_can_drain_t)(struct ifmp_ring *);
+typedef void (*mp_ring_serial_t)(struct ifmp_ring *);
+
+#if defined(__powerpc__) || defined(__mips__) || defined(__i386__)
+#define MP_RING_NO_64BIT_ATOMICS
+#endif
+
+struct ifmp_ring {
+ volatile uint64_t state __aligned(CACHE_LINE_SIZE);
+
+ int size __aligned(CACHE_LINE_SIZE);
+ void * cookie;
+ struct malloc_type * mt;
+ mp_ring_drain_t drain;
+ mp_ring_can_drain_t can_drain; /* cheap, may be unreliable */
+ counter_u64_t enqueues;
+ counter_u64_t drops;
+ counter_u64_t starts;
+ counter_u64_t stalls;
+ counter_u64_t restarts; /* recovered after stalling */
+ counter_u64_t abdications;
+#ifdef MP_RING_NO_64BIT_ATOMICS
+ struct mtx lock;
+#endif
+ void * volatile items[] __aligned(CACHE_LINE_SIZE);
+};
+
+int ifmp_ring_alloc(struct ifmp_ring **, int, void *, mp_ring_drain_t,
+ mp_ring_can_drain_t, struct malloc_type *, int);
+void ifmp_ring_free(struct ifmp_ring *);
+int ifmp_ring_enqueue(struct ifmp_ring *, void **, int, int, int);
+void ifmp_ring_check_drainage(struct ifmp_ring *, int);
+void ifmp_ring_reset_stats(struct ifmp_ring *);
+int ifmp_ring_is_idle(struct ifmp_ring *);
+int ifmp_ring_is_stalled(struct ifmp_ring *r);
+#endif
diff --git a/freebsd/sys/x86/include/machine/intr_machdep.h b/freebsd/sys/x86/include/machine/intr_machdep.h
new file mode 100644
index 00000000..4818e932
--- /dev/null
+++ b/freebsd/sys/x86/include/machine/intr_machdep.h
@@ -0,0 +1,180 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2003 John Baldwin <jhb at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __X86_INTR_MACHDEP_H__
+#define __X86_INTR_MACHDEP_H__
+
+#ifdef _KERNEL
+
+/*
+ * Values used in determining the allocation of IRQ values among
+ * different types of I/O interrupts. These values are used as
+ * indices into a interrupt source array to map I/O interrupts to a
+ * device interrupt source whether it be a pin on an interrupt
+ * controller or an MSI interrupt. The 16 ISA IRQs are assigned fixed
+ * IDT vectors, but all other device interrupts allocate IDT vectors
+ * on demand. Currently we have 191 IDT vectors available for device
+ * interrupts on each CPU. On many systems with I/O APICs, a lot of
+ * the IRQs are not used, so the total number of IRQ values reserved
+ * can exceed the number of available IDT slots.
+ *
+ * The first 16 IRQs (0 - 15) are reserved for ISA IRQs. Interrupt
+ * pins on I/O APICs for non-ISA interrupts use IRQ values starting at
+ * IRQ 17. This layout matches the GSI numbering used by ACPI so that
+ * IRQ values returned by ACPI methods such as _CRS can be used
+ * directly by the ACPI bus driver.
+ *
+ * MSI interrupts allocate a block of interrupts starting at either
+ * the end of the I/O APIC range or 256, whichever is higher. When
+ * running under the Xen Hypervisor, an additional range of IRQ values
+ * are available for binding to event channel events. We use 256 as
+ * the minimum IRQ value for MSI interrupts to attempt to leave 255
+ * unused since 255 is used in PCI to indicate an invalid INTx IRQ.
+ */
+#define MINIMUM_MSI_INT 256
+
+extern u_int first_msi_irq;
+extern u_int num_io_irqs;
+extern u_int num_msi_irqs;
+
+/*
+ * Default base address for MSI messages on x86 platforms.
+ */
+#define MSI_INTEL_ADDR_BASE 0xfee00000
+
+#ifndef LOCORE
+
+typedef void inthand_t(void);
+
+#define IDTVEC(name) __CONCAT(X,name)
+
+struct intsrc;
+
+/*
+ * Methods that a PIC provides to mask/unmask a given interrupt source,
+ * "turn on" the interrupt on the CPU side by setting up an IDT entry, and
+ * return the vector associated with this source.
+ */
+struct pic {
+ void (*pic_register_sources)(struct pic *);
+ void (*pic_enable_source)(struct intsrc *);
+ void (*pic_disable_source)(struct intsrc *, int);
+ void (*pic_eoi_source)(struct intsrc *);
+ void (*pic_enable_intr)(struct intsrc *);
+ void (*pic_disable_intr)(struct intsrc *);
+ int (*pic_vector)(struct intsrc *);
+ int (*pic_source_pending)(struct intsrc *);
+ void (*pic_suspend)(struct pic *);
+ void (*pic_resume)(struct pic *, bool suspend_cancelled);
+ int (*pic_config_intr)(struct intsrc *, enum intr_trigger,
+ enum intr_polarity);
+ int (*pic_assign_cpu)(struct intsrc *, u_int apic_id);
+ void (*pic_reprogram_pin)(struct intsrc *);
+ TAILQ_ENTRY(pic) pics;
+};
+
+/* Flags for pic_disable_source() */
+enum {
+ PIC_EOI,
+ PIC_NO_EOI,
+};
+
+/*
+ * An interrupt source. The upper-layer code uses the PIC methods to
+ * control a given source. The lower-layer PIC drivers can store additional
+ * private data in a given interrupt source such as an interrupt pin number
+ * or an I/O APIC pointer.
+ */
+struct intsrc {
+ struct pic *is_pic;
+ struct intr_event *is_event;
+ u_long *is_count;
+ u_long *is_straycount;
+ u_int is_index;
+ u_int is_handlers;
+ u_int is_domain;
+ u_int is_cpu;
+};
+
+struct trapframe;
+
+#ifdef SMP
+extern cpuset_t intr_cpus;
+#endif
+extern struct mtx icu_lock;
+extern int elcr_found;
+#ifdef SMP
+extern int msix_disable_migration;
+#endif
+
+#ifndef DEV_ATPIC
+void atpic_reset(void);
+#endif
+/* XXX: The elcr_* prototypes probably belong somewhere else. */
+int elcr_probe(void);
+enum intr_trigger elcr_read_trigger(u_int irq);
+void elcr_resume(void);
+void elcr_write_trigger(u_int irq, enum intr_trigger trigger);
+#ifdef SMP
+void intr_add_cpu(u_int cpu);
+#endif
+int intr_add_handler(const char *name, int vector, driver_filter_t filter,
+ driver_intr_t handler, void *arg, enum intr_type flags, void **cookiep,
+ int domain);
+#ifdef SMP
+int intr_bind(u_int vector, u_char cpu);
+#endif
+int intr_config_intr(int vector, enum intr_trigger trig,
+ enum intr_polarity pol);
+int intr_describe(u_int vector, void *ih, const char *descr);
+void intr_execute_handlers(struct intsrc *isrc, struct trapframe *frame);
+u_int intr_next_cpu(int domain);
+struct intsrc *intr_lookup_source(int vector);
+int intr_register_pic(struct pic *pic);
+int intr_register_source(struct intsrc *isrc);
+int intr_remove_handler(void *cookie);
+void intr_resume(bool suspend_cancelled);
+void intr_suspend(void);
+void intr_reprogram(void);
+void intrcnt_add(const char *name, u_long **countp);
+void nexus_add_irq(u_long irq);
+int msi_alloc(device_t dev, int count, int maxcount, int *irqs);
+void msi_init(void);
+int msi_map(int irq, uint64_t *addr, uint32_t *data);
+int msi_release(int *irqs, int count);
+int msix_alloc(device_t dev, int *irq);
+int msix_release(int irq);
+#ifdef XENHVM
+void xen_intr_alloc_irqs(void);
+#endif
+
+#endif /* !LOCORE */
+#endif /* _KERNEL */
+#endif /* !__X86_INTR_MACHDEP_H__ */
diff --git a/freebsd/sys/x86/include/machine/legacyvar.h b/freebsd/sys/x86/include/machine/legacyvar.h
new file mode 100644
index 00000000..f6e5814a
--- /dev/null
+++ b/freebsd/sys/x86/include/machine/legacyvar.h
@@ -0,0 +1,73 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2000 Peter Wemm <peter at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _X86_LEGACYVAR_H_
+#define _X86_LEGACYVAR_H_
+
+enum legacy_device_ivars {
+ LEGACY_IVAR_PCIDOMAIN,
+ LEGACY_IVAR_PCIBUS,
+ LEGACY_IVAR_PCISLOT,
+ LEGACY_IVAR_PCIFUNC
+};
+
+#define LEGACY_ACCESSOR(var, ivar, type) \
+ __BUS_ACCESSOR(legacy, var, LEGACY, ivar, type)
+
+LEGACY_ACCESSOR(pcidomain, PCIDOMAIN, uint32_t)
+LEGACY_ACCESSOR(pcibus, PCIBUS, uint32_t)
+LEGACY_ACCESSOR(pcislot, PCISLOT, int)
+LEGACY_ACCESSOR(pcifunc, PCIFUNC, int)
+
+#undef LEGACY_ACCESSOR
+
+int legacy_pcib_maxslots(device_t dev);
+uint32_t legacy_pcib_read_config(device_t dev, u_int bus, u_int slot,
+ u_int func, u_int reg, int bytes);
+int legacy_pcib_read_ivar(device_t dev, device_t child, int which,
+ uintptr_t *result);
+void legacy_pcib_write_config(device_t dev, u_int bus, u_int slot,
+ u_int func, u_int reg, uint32_t data, int bytes);
+int legacy_pcib_write_ivar(device_t dev, device_t child, int which,
+ uintptr_t value);
+struct resource *legacy_pcib_alloc_resource(device_t dev, device_t child,
+ int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count,
+ u_int flags);
+int legacy_pcib_adjust_resource(device_t dev, device_t child, int type,
+ struct resource *r, rman_res_t start, rman_res_t end);
+int legacy_pcib_release_resource(device_t dev, device_t child, int type,
+ int rid, struct resource *r);
+int legacy_pcib_alloc_msi(device_t pcib, device_t dev, int count,
+ int maxcount, int *irqs);
+int legacy_pcib_alloc_msix(device_t pcib, device_t dev, int *irq);
+int legacy_pcib_map_msi(device_t pcib, device_t dev, int irq,
+ uint64_t *addr, uint32_t *data);
+
+#endif /* !_X86_LEGACYVAR_H_ */
diff --git a/freebsd/sys/x86/x86/legacy.c b/freebsd/sys/x86/x86/legacy.c
new file mode 100644
index 00000000..1ac57d26
--- /dev/null
+++ b/freebsd/sys/x86/x86/legacy.c
@@ -0,0 +1,404 @@
+#include <machine/rtems-bsd-kernel-space.h>
+
+/*-
+ * Copyright 1998 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that both the above copyright notice and this
+ * permission notice appear in all copies, that both the above
+ * copyright notice and this permission notice appear in all
+ * supporting documentation, and that the name of M.I.T. not be used
+ * in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission. M.I.T. makes
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
+ * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+ * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * This code implements a system driver for legacy systems that do not
+ * support ACPI or when ACPI support is not present in the kernel.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/cpu.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <machine/bus.h>
+#include <sys/pcpu.h>
+#include <sys/rman.h>
+#include <sys/smp.h>
+#include <dev/pci/pcireg.h>
+
+#include <machine/clock.h>
+#include <machine/pci_cfgreg.h>
+#include <machine/resource.h>
+#include <x86/legacyvar.h>
+
+static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
+struct legacy_device {
+ int lg_pcibus;
+ int lg_pcislot;
+ int lg_pcifunc;
+};
+
+#define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
+
+static int legacy_probe(device_t);
+static int legacy_attach(device_t);
+static int legacy_print_child(device_t, device_t);
+static device_t legacy_add_child(device_t bus, u_int order, const char *name,
+ int unit);
+static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
+static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
+
+static device_method_t legacy_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, legacy_probe),
+ DEVMETHOD(device_attach, legacy_attach),
+ DEVMETHOD(device_detach, bus_generic_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, bus_generic_suspend),
+ DEVMETHOD(device_resume, bus_generic_resume),
+
+ /* Bus interface */
+ DEVMETHOD(bus_print_child, legacy_print_child),
+ DEVMETHOD(bus_add_child, legacy_add_child),
+ DEVMETHOD(bus_read_ivar, legacy_read_ivar),
+ DEVMETHOD(bus_write_ivar, legacy_write_ivar),
+ DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
+ DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
+ DEVMETHOD(bus_release_resource, bus_generic_release_resource),
+ DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+ DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+ DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
+ DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
+
+ { 0, 0 }
+};
+
+static driver_t legacy_driver = {
+ "legacy",
+ legacy_methods,
+ 1, /* no softc */
+};
+static devclass_t legacy_devclass;
+
+DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
+
+static int
+legacy_probe(device_t dev)
+{
+
+ device_set_desc(dev, "legacy system");
+ device_quiet(dev);
+ return (0);
+}
+
+#ifndef __rtems__
+/*
+ * Grope around in the PCI config space to see if this is a chipset
+ * that is capable of doing memory-mapped config cycles. This also
+ * implies that it can do PCIe extended config cycles.
+ */
+static void
+legacy_pci_cfgregopen(device_t dev)
+{
+ uint64_t pciebar;
+ u_int16_t did, vid;
+
+ if (cfgmech == CFGMECH_NONE || cfgmech == CFGMECH_PCIE)
+ return;
+
+ /* Check for supported chipsets */
+ vid = pci_cfgregread(0, 0, 0, PCIR_VENDOR, 2);
+ did = pci_cfgregread(0, 0, 0, PCIR_DEVICE, 2);
+ switch (vid) {
+ case 0x8086:
+ switch (did) {
+ case 0x3590:
+ case 0x3592:
+ /* Intel 7520 or 7320 */
+ pciebar = pci_cfgregread(0, 0, 0, 0xce, 2) << 16;
+ pcie_cfgregopen(pciebar, 0, 255);
+ break;
+ case 0x2580:
+ case 0x2584:
+ case 0x2590:
+ /* Intel 915, 925, or 915GM */
+ pciebar = pci_cfgregread(0, 0, 0, 0x48, 4);
+ pcie_cfgregopen(pciebar, 0, 255);
+ break;
+ }
+ }
+
+ if (bootverbose && cfgmech == CFGMECH_PCIE)
+ device_printf(dev, "Enabled ECAM PCIe accesses\n");
+}
+#endif /* __rtems__ */
+
+static int
+legacy_attach(device_t dev)
+{
+ device_t child;
+
+#ifndef __rtems__
+ legacy_pci_cfgregopen(dev);
+#endif /* __rtems__ */
+
+ /*
+ * Let our child drivers identify any child devices that they
+ * can find. Once that is done attach any devices that we
+ * found.
+ */
+ bus_generic_probe(dev);
+ bus_generic_attach(dev);
+
+ /*
+ * If we didn't see ISA on a pci bridge, create some
+ * connection points now so they show up "on motherboard".
+ */
+ if (!devclass_get_device(devclass_find("isa"), 0)) {
+ child = BUS_ADD_CHILD(dev, 0, "isa", 0);
+ if (child == NULL)
+ panic("legacy_attach isa");
+ device_probe_and_attach(child);
+ }
+
+ return 0;
+}
+
+static int
+legacy_print_child(device_t bus, device_t child)
+{
+ struct legacy_device *atdev = DEVTOAT(child);
+ int retval = 0;
+
+ retval += bus_print_child_header(bus, child);
+ if (atdev->lg_pcibus != -1)
+ retval += printf(" pcibus %d", atdev->lg_pcibus);
+ retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
+
+ return (retval);
+}
+
+static device_t
+legacy_add_child(device_t bus, u_int order, const char *name, int unit)
+{
+ device_t child;
+ struct legacy_device *atdev;
+
+ atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
+ M_NOWAIT | M_ZERO);
+ if (atdev == NULL)
+ return(NULL);
+ atdev->lg_pcibus = -1;
+ atdev->lg_pcislot = -1;
+ atdev->lg_pcifunc = -1;
+
+ child = device_add_child_ordered(bus, order, name, unit);
+ if (child == NULL)
+ free(atdev, M_LEGACYDEV);
+ else
+ /* should we free this in legacy_child_detached? */
+ device_set_ivars(child, atdev);
+
+ return (child);
+}
+
+static int
+legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
+{
+ struct legacy_device *atdev = DEVTOAT(child);
+
+ switch (which) {
+ case LEGACY_IVAR_PCIDOMAIN:
+ *result = 0;
+ break;
+ case LEGACY_IVAR_PCIBUS:
+ *result = atdev->lg_pcibus;
+ break;
+ case LEGACY_IVAR_PCISLOT:
+ *result = atdev->lg_pcislot;
+ break;
+ case LEGACY_IVAR_PCIFUNC:
+ *result = atdev->lg_pcifunc;
+ break;
+ default:
+ return ENOENT;
+ }
+ return 0;
+}
+
+
+static int
+legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
+{
+ struct legacy_device *atdev = DEVTOAT(child);
+
+ switch (which) {
+ case LEGACY_IVAR_PCIDOMAIN:
+ return EINVAL;
+ case LEGACY_IVAR_PCIBUS:
+ atdev->lg_pcibus = value;
+ break;
+ case LEGACY_IVAR_PCISLOT:
+ atdev->lg_pcislot = value;
+ break;
+ case LEGACY_IVAR_PCIFUNC:
+ atdev->lg_pcifunc = value;
+ break;
+ default:
+ return ENOENT;
+ }
+ return 0;
+}
+
+/*
+ * Legacy CPU attachment when ACPI is not available. Drivers like
+ * cpufreq(4) hang off this.
+ */
+static void cpu_identify(driver_t *driver, device_t parent);
+static int cpu_read_ivar(device_t dev, device_t child, int index,
+ uintptr_t *result);
+static device_t cpu_add_child(device_t bus, u_int order, const char *name,
+ int unit);
+static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
+
+struct cpu_device {
+ struct resource_list cd_rl;
+ struct pcpu *cd_pcpu;
+};
+
+static device_method_t cpu_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_identify, cpu_identify),
+ DEVMETHOD(device_probe, bus_generic_probe),
+ DEVMETHOD(device_attach, bus_generic_attach),
+ DEVMETHOD(device_detach, bus_generic_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, bus_generic_suspend),
+ DEVMETHOD(device_resume, bus_generic_resume),
+
+ /* Bus interface */
+ DEVMETHOD(bus_add_child, cpu_add_child),
+ DEVMETHOD(bus_read_ivar, cpu_read_ivar),
+ DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
+ DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
+ DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
+ DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
+ DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
+ DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+ DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+ DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
+ DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
+
+ DEVMETHOD_END
+};
+
+static driver_t cpu_driver = {
+ "cpu",
+ cpu_methods,
+ 1, /* no softc */
+};
+static devclass_t cpu_devclass;
+DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
+
+static void
+cpu_identify(driver_t *driver, device_t parent)
+{
+ device_t child;
+ int i;
+
+ /*
+ * Attach a cpuX device for each CPU. We use an order of 150
+ * so that these devices are attached after the Host-PCI
+ * bridges (which are added at order 100).
+ */
+ CPU_FOREACH(i) {
+ child = BUS_ADD_CHILD(parent, 150, "cpu", i);
+ if (child == NULL)
+ panic("legacy_attach cpu");
+ }
+}
+
+static device_t
+cpu_add_child(device_t bus, u_int order, const char *name, int unit)
+{
+ struct cpu_device *cd;
+ device_t child;
+ struct pcpu *pc;
+
+ if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
+ return (NULL);
+
+ resource_list_init(&cd->cd_rl);
+#ifndef __rtems__
+ pc = pcpu_find(device_get_unit(bus));
+ cd->cd_pcpu = pc;
+#endif /* __rtems__ */
+
+ child = device_add_child_ordered(bus, order, name, unit);
+ if (child != NULL) {
+#ifndef __rtems__
+ pc->pc_device = child;
+#endif /* __rtems__ */
+ device_set_ivars(child, cd);
+ } else
+ free(cd, M_DEVBUF);
+ return (child);
+}
+
+static struct resource_list *
+cpu_get_rlist(device_t dev, device_t child)
+{
+ struct cpu_device *cpdev;
+
+ cpdev = device_get_ivars(child);
+ return (&cpdev->cd_rl);
+}
+
+static int
+cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
+{
+ struct cpu_device *cpdev;
+
+ switch (index) {
+#ifndef __rtems__
+ case CPU_IVAR_PCPU:
+ cpdev = device_get_ivars(child);
+ *result = (uintptr_t)cpdev->cd_pcpu;
+ break;
+ case CPU_IVAR_NOMINAL_MHZ:
+ if (tsc_is_invariant) {
+ *result = (uintptr_t)(atomic_load_acq_64(&tsc_freq) /
+ 1000000);
+ break;
+ }
+ /* FALLTHROUGH */
+#endif /* __rtems__ */
+ default:
+ return (ENOENT);
+ }
+ return (0);
+}
--
2.17.1
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