[PATCH rtems-net-legacy] powerpc/beatnik: Add mv643xx_eth.c driver from RTEMS 5
Chris Johns
chrisj at rtems.org
Wed Jul 19 02:10:38 UTC 2023
Looks good.
On 19/7/2023 5:30 am, Joel Sherrill wrote:
> I'm ok with this.
>
> Is there anything documentation-ish that needs updating? README? User Guide info
> on the BSP?
>
> --joel
>
> On Tue, Jul 18, 2023 at 10:37 AM Vijay Kumar Banerjee <vijay at rtems.org
> <mailto:vijay at rtems.org>> wrote:
>
> ---
> bsp_drivers.py | 2 +
> bsps/powerpc/beatnik/net/if_mve/mv643xx_eth.c | 3318 +++++++++++++++++
> 2 files changed, 3320 insertions(+)
> create mode 100644 bsps/powerpc/beatnik/net/if_mve/mv643xx_eth.c
>
> diff --git a/bsp_drivers.py b/bsp_drivers.py
> index e2250aa..5628ff3 100644
> --- a/bsp_drivers.py
> +++ b/bsp_drivers.py
> @@ -79,6 +79,7 @@ include = {
> 'bsps/powerpc/beatnik/net',
> 'bsps/powerpc/beatnik/net/if_em',
> 'bsps/powerpc/beatnik/net/if_gfe',
> + 'bsps/powerpc/beatnik/net/if_mve',
> 'bsps/powerpc/beatnik/net/porting',
> ],
> 'powerpc/mpc8260ads': [
> @@ -174,6 +175,7 @@ source = {
> 'bsps/powerpc/beatnik/net/if_em/if_em_rtems.c',
> 'bsps/powerpc/beatnik/net/if_gfe/if_gfe.c',
> 'bsps/powerpc/beatnik/net/if_gfe/if_gfe_rtems.c',
> + 'bsps/powerpc/beatnik/net/if_mve/mv643xx_eth.c',
> 'bsps/powerpc/beatnik/net/porting/if_xxx_rtems.c',
> 'bsps/powerpc/beatnik/net/support/bsp_attach.c',
> 'bsps/powerpc/beatnik/net/support/early_link_status.c',
> diff --git a/bsps/powerpc/beatnik/net/if_mve/mv643xx_eth.c
> b/bsps/powerpc/beatnik/net/if_mve/mv643xx_eth.c
> new file mode 100644
> index 0000000..85ab038
> --- /dev/null
> +++ b/bsps/powerpc/beatnik/net/if_mve/mv643xx_eth.c
> @@ -0,0 +1,3318 @@
> +/* RTEMS driver for the mv643xx gigabit ethernet chip */
> +
> +/* Acknowledgement:
> + *
> + * Valuable information for developing this driver was obtained
> + * from the linux open-source driver mv643xx_eth.c which was written
> + * by the following people and organizations:
> + *
> + * Matthew Dharm <mdharm at momenco.com <mailto:mdharm at momenco.com>>
> + * rabeeh at galileo.co.il <mailto:rabeeh at galileo.co.il>
> + * PMC-Sierra, Inc., Manish Lachwani
> + * Ralf Baechle <ralf at linux-mips.org <mailto:ralf at linux-mips.org>>
> + * MontaVista Software, Inc., Dale Farnsworth <dale at farnsworth.org
> <mailto:dale at farnsworth.org>>
> + * Steven J. Hill <sjhill1 at rockwellcollins.com
> <mailto:sjhill1 at rockwellcollins.com>>/<sjhill at realitydiluted.com
> <mailto:sjhill at realitydiluted.com>>
> + *
> + * Note however, that in spite of the identical name of this file
> + * (and some of the symbols used herein) this file provides a
> + * new implementation and is the original work by the author.
> + */
> +
> +/*
> + * Authorship
> + * ----------
> + * This software (mv643xx ethernet driver for RTEMS) was
> + * created by Till Straumann <strauman at slac.stanford.edu
> <mailto:strauman at slac.stanford.edu>>, 2005-2007,
> + * Stanford Linear Accelerator Center, Stanford University.
> + *
> + * Acknowledgement of sponsorship
> + * ------------------------------
> + * The 'mv643xx ethernet driver for RTEMS' was produced by
> + * the Stanford Linear Accelerator Center, Stanford University,
> + * under Contract DE-AC03-76SFO0515 with the Department of Energy.
> + *
> + * Government disclaimer of liability
> + * ----------------------------------
> + * Neither the United States nor the United States Department of Energy,
> + * nor any of their employees, makes any warranty, express or implied, or
> + * assumes any legal liability or responsibility for the accuracy,
> + * completeness, or usefulness of any data, apparatus, product, or process
> + * disclosed, or represents that its use would not infringe privately owned
> + * rights.
> + *
> + * Stanford disclaimer of liability
> + * --------------------------------
> + * Stanford University makes no representations or warranties, express or
> + * implied, nor assumes any liability for the use of this software.
> + *
> + * Stanford disclaimer of copyright
> + * --------------------------------
> + * Stanford University, owner of the copyright, hereby disclaims its
> + * copyright and all other rights in this software. Hence, anyone may
> + * freely use it for any purpose without restriction.
> + *
> + * Maintenance of notices
> + * ----------------------
> + * In the interest of clarity regarding the origin and status of this
> + * SLAC software, this and all the preceding Stanford University notices
> + * are to remain affixed to any copy or derivative of this software made
> + * or distributed by the recipient and are to be affixed to any copy of
> + * software made or distributed by the recipient that contains a copy or
> + * derivative of this software.
> + *
> + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
> + */
> +
> +/*
> + * NOTE: Some register (e.g., the SMI register) are SHARED among the
> + * three devices. Concurrent access protection is provided by
> + * the global networking semaphore.
> + * If other drivers are running on a subset of IFs then proper
> + * locking of all shared registers must be implemented!
> + *
> + * Some things I learned about this hardware can be found
> + * further down...
> + */
> +
> +#ifndef KERNEL
> +#define KERNEL
> +#endif
> +#ifndef _KERNEL
> +#define _KERNEL
> +#endif
> +
> +#include <rtems.h>
> +#include <rtems/bspIo.h>
> +#include <rtems/error.h>
> +#include <bsp.h>
> +#include <bsp/irq.h>
> +#include <bsp/gtreg.h>
> +#include <libcpu/byteorder.h>
> +
> +#include <sys/param.h>
> +#include <sys/proc.h>
> +#include <sys/socket.h>
> +#include <sys/sockio.h>
> +#include <dev/mii/mii.h>
> +#include <net/if_var.h>
> +#include <net/if_media.h>
> +
> +/* Not so nice; would be more elegant not to depend on C library but the
> + * RTEMS-specific ioctl for dumping statistics needs stdio anyways.
> + */
> +
> +/*#define NDEBUG effectively removes all assertions
> + * If defining NDEBUG, MAKE SURE assert() EXPRESSION HAVE NO SIDE_EFFECTS!!
> + * This driver DOES have side-effects, so DONT DEFINE NDEBUG
> + * Performance-critical assertions are removed by undefining MVETH_TESTING.
> + */
> +
> +#undef NDEBUG
> +#include <assert.h>
> +#include <stdio.h>
> +#include <errno.h>
> +#include <inttypes.h>
> +
> +#include <rtems/rtems_bsdnet.h>
> +#include <sys/param.h>
> +#include <sys/mbuf.h>
> +#include <sys/socket.h>
> +#include <sys/sockio.h>
> +#include <net/ethernet.h>
> +#include <net/if.h>
> +#include <netinet/in.h>
> +#include <netinet/if_ether.h>
> +
> +#include <rtems/rtems_mii_ioctl.h>
> +#include <bsp/early_enet_link_status.h>
> +#include <bsp/if_mve_pub.h>
> +
> +/* CONFIGURABLE PARAMETERS */
> +
> +/* Enable Hardware Snooping; if this is disabled (undefined),
> + * cache coherency is maintained by software.
> + */
> +#undef ENABLE_HW_SNOOPING
> +
> +/* Compile-time debugging features */
> +
> +/* Enable paranoia assertions and checks; reduce # of descriptors to
> minimum for stressing */
> +#undef MVETH_TESTING
> +
> +/* Enable debugging messages and some support routines (dump rings etc.)
> */
> +#undef MVETH_DEBUG
> +
> +/* Hack for driver development; rtems bsdnet doesn't implement detaching an
> interface :-(
> + * but this hack allows us to unload/reload the driver module which makes
> development
> + * a lot less painful.
> + */
> +#undef MVETH_DETACH_HACK
> +
> +/* Ring sizes */
> +
> +#ifdef MVETH_TESTING
> +
> +/* hard and small defaults */
> +#undef MV643XX_RX_RING_SIZE
> +#define MV643XX_RX_RING_SIZE 2
> +#undef MV643XX_TX_RING_SIZE
> +#define MV643XX_TX_RING_SIZE 4
> +
> +#else /* MVETH_TESTING */
> +
> +/* Define default ring sizes, allow override from bsp.h, Makefile,... and
> from ifcfg->rbuf_count/xbuf_count */
> +
> +#ifndef MV643XX_RX_RING_SIZE
> +#define MV643XX_RX_RING_SIZE 40 /* attached buffers are always 2k
> clusters, i.e., this
> + *
> driver - with a configured ring size of 40 - constantly
> + *
> locks 80k of cluster memory - your app config better
> + *
> provides enough space!
> + */
> +#endif
> +
> +#ifndef MV643XX_TX_RING_SIZE
> +/* NOTE: tx ring size MUST be > max. # of fragments / mbufs in a chain;
> + * in 'TESTING' mode, special code is compiled in to repackage
> + * chains that are longer than the ring size. Normally, this is
> + * disabled for sake of speed.
> + * I observed chains of >17 entries regularly!
> + *
> + * Also, TX_NUM_TAG_SLOTS (1) must be left empty as a marker, hence
> + * the ring size must be > max. #frags + 1.
> + */
> +#define MV643XX_TX_RING_SIZE 200 /* these are smaller fragments and
> not occupied when
> + *
> the driver is idle.
> + */
> +#endif
> +
> +#endif /* MVETH_TESTING */
> +
> +/* How many instances to we support (bsp.h could override) */
> +#ifndef MV643XXETH_NUM_DRIVER_SLOTS
> +#define MV643XXETH_NUM_DRIVER_SLOTS 2
> +#endif
> +
> +#define TX_NUM_TAG_SLOTS 1 /* leave room for tag;
> must not be 0 */
> +
> +/* This is REAL; chip reads from 64-bit down-aligned buffer
> + * if the buffer size is < 8 !!! for buffer sizes 8 and upwards
> + * alignment is not an issue. This was verified using the
> + * 'mve_smallbuf_test.c'
> + */
> +#define ENABLE_TX_WORKAROUND_8_BYTE_PROBLEM
> +
> +/* Chip register configuration values */
> +#define MVETH_PORT_CONFIG_VAL (0
> \
> + | MV643XX_ETH_DFLT_RX_Q(0)
> \
> + | MV643XX_ETH_DFLT_RX_ARP_Q(0)
> \
> + | MV643XX_ETH_DFLT_RX_TCP_Q(0)
> \
> + | MV643XX_ETH_DFLT_RX_UDP_Q(0)
> \
> + | MV643XX_ETH_DFLT_RX_BPDU_Q(0)
> \
> + )
> +
> +
> +#define MVETH_PORT_XTEND_CONFIG_VAL 0
> +
> +#ifdef OLDCONFIGVAL
> +#define MVETH_SERIAL_CTRL_CONFIG_VAL (0
> \
> + | MV643XX_ETH_FORCE_LINK_PASS
> \
> + | MV643XX_ETH_DISABLE_AUTO_NEG_FOR_FLOWCTL \
> + | MV643XX_ETH_ADVERTISE_SYMMETRIC_FLOWCTL \
> + | MV643XX_ETH_BIT9_UNKNOWN
> \
> + | MV643XX_ETH_FORCE_LINK_FAIL_DISABLE \
> + | MV643XX_ETH_SC_MAX_RX_1552
> \
> + | MV643XX_ETH_SET_FULL_DUPLEX
> \
> + | MV643XX_ETH_ENBL_FLOWCTL_TX_RX_IN_FD \
> + )
> +#endif
> +/* If we enable autoneg (duplex, speed, ...) then it seems
> + * that the chip automatically updates link settings
> + * (correct link settings are reflected in PORT_STATUS_R).
> + * However, when we disable aneg in the PHY then things
> + * can get messed up and the port doesn't work anymore.
> + * => we follow the linux driver in disabling all aneg
> + * in the serial config reg. and manually updating the
> + * speed & duplex bits when the phy link status changes.
> + * FIXME: don't know what to do about pause/flow-ctrl.
> + * It is best to just use ANEG anyways!!!
> + */
> +#define MVETH_SERIAL_CTRL_CONFIG_VAL (0
> \
> + | MV643XX_ETH_DISABLE_AUTO_NEG_FOR_DUPLEX \
> + | MV643XX_ETH_DISABLE_AUTO_NEG_FOR_FLOWCTL \
> + | MV643XX_ETH_ADVERTISE_SYMMETRIC_FLOWCTL \
> + | MV643XX_ETH_BIT9_UNKNOWN
> \
> + | MV643XX_ETH_FORCE_LINK_FAIL_DISABLE \
> + | MV643XX_ETH_DISABLE_AUTO_NEG_SPEED_GMII \
> + | MV643XX_ETH_SC_MAX_RX_1552
> \
> + )
> +
> +#define MVETH_SERIAL_CTRL_CONFIG_MSK (0
> \
> + | MV643XX_ETH_SERIAL_PORT_ENBL
> \
> + | MV643XX_ETH_FORCE_LINK_PASS
> \
> + | MV643XX_ETH_SC_MAX_RX_MASK
> \
> + )
> +
> +
> +#ifdef __PPC__
> +#define MVETH_SDMA_CONFIG_VAL (0
> \
> + | MV643XX_ETH_RX_BURST_SZ_4_64BIT
> \
> + | MV643XX_ETH_TX_BURST_SZ_4_64BIT
> \
> + )
> +#else
> +#define MVETH_SDMA_CONFIG_VAL (0
> \
> + | MV643XX_ETH_RX_BURST_SZ_16_64BIT
> \
> + | MV643XX_ETH_TX_BURST_SZ_16_64BIT
> \
> + )
> +#endif
> +
> +/* minimal frame size we accept */
> +#define MVETH_MIN_FRAMSZ_CONFIG_VAL 40
> +
> +/* END OF CONFIGURABLE SECTION */
> +
> +/*
> + * Here's stuff I learned about this chip:
> + *
> + *
> + * RX interrupt flags:
> + *
> + * broadcast packet RX: 0x00000005
> + * last buf: 0x00000c05
> + * overrun: 0x00000c00
> + * unicast packet RX: 0x00000005
> + * bad CRC received: 0x00000005
> + *
> + * clearing 0x00000004 -> clears 0x00000001
> + * clearing 0x00000400 -> clears 0x00000800
> + *
> + * --> 0x0801 are probably some sort of summary bits.
> + *
> + * TX interrupt flags:
> + *
> + * broadcast packet in 1 buf: xcause: 0x00000001 (cause 0x00080000)
> + * into disconn. link: " "
> + *
> + * in some cases, I observed xcause: 0x00000101 (reason for 0x100 unknown
> + * but the linux driver accepts it also).
> + *
> + *
> + * Here a few more ugly things about this piece of hardware I learned
> + * (painfully, painfully; spending many many hours & nights :-()
> + *
> + * a) Especially in the case of 'chained' descriptors, the DMA keeps
> + * clobbering 'cmd_sts' long after it cleared the OWNership flag!!!
> + * Only after the whole chain is processed (OWN cleared on the
> + * last descriptor) it is safe to change cmd_sts.
> + * However, in the case of hardware snooping I found that the
> + * last descriptor in chain has its cmd_sts still clobbered *after*
> + * checking ownership!, I.e.,
> + * if ( ! OWN & cmd_sts ) {
> + * cmd_sts = 0;
> + * }
> + * --> sometimes, cmd_sts is STILL != 0 here
> + *
> + * b) Sometimes, the OWNership flag is *not cleared*.
> + *
> + * c) Weird things happen if the chip finds a descriptor with 'OWN'
> + * still set (i.e., not properly loaded), i.e., corrupted packets
> + * are sent [with OK checksum since the chip calculates it].
> + *
> + * Combine a+b+c and we end up with a real mess.
> + *
> + * The fact that the chip doesn't reliably reset OWN and that OTOH,
> + * it can't be reliably reset by the driver and still, the chip needs
> + * it for proper communication doesn't make things easy...
> + *
> + * Here the basic workarounds:
> + *
> + * - In addition to check OWN, the scavenger compares the "currently
> + * served desc" register to the descriptor it tries to recover and
> + * ignores OWN if they do not match. Hope this is OK.
> + * Otherwise, we could scan the list of used descriptors and proceed
> + * recycling descriptors if we find a !OWNed one behind the target...
> + *
> + * - Always keep an empty slot around to mark the end of the list of
> + * jobs. The driver clears the descriptor ahead when enqueueing a new
> + * packet.
> + */
> +
> +#define DRVNAME "mve"
> +#define MAX_NUM_SLOTS 3
> +
> +#if MV643XXETH_NUM_DRIVER_SLOTS > MAX_NUM_SLOTS
> +#error "mv643xxeth: only MAX_NUM_SLOTS supported"
> +#endif
> +
> +#ifdef NDEBUG
> +#error "Driver uses assert() statements with side-effects; MUST NOT define
> NDEBUG"
> +#endif
> +
> +#ifdef MVETH_DEBUG
> +#define STATIC
> +#else
> +#define STATIC static
> +#endif
> +
> +#define TX_AVAILABLE_RING_SIZE(mp) ((mp)->xbuf_count -
> (TX_NUM_TAG_SLOTS))
> +
> +/* macros for ring alignment; proper alignment is a hardware req; . */
> +
> +#ifdef ENABLE_HW_SNOOPING
> +
> +#define RING_ALIGNMENT 16
> +/* rx buffers must be 64-bit aligned (chip requirement) */
> +#define RX_BUF_ALIGNMENT 8
> +
> +#else /* ENABLE_HW_SNOOPING */
> +
> +/* Software cache management */
> +
> +#ifndef __PPC__
> +#error "Dont' know how to deal with cache on this CPU architecture"
> +#endif
> +
> +/* Ring entries are 32 bytes; coherency-critical chunks are 16 -> software
> coherency
> + * management works for cache line sizes of 16 and 32 bytes only. If the
> line size
> + * is bigger, the descriptors could be padded...
> + */
> +#if PPC_CACHE_ALIGMENT != 16 && PPC_CACHE_ALIGNMENT != 32
> +#error "Cache line size must be 16 or 32"
> +#else
> +#define RING_ALIGNMENT PPC_CACHE_ALIGNMENT
> +#define RX_BUF_ALIGNMENT PPC_CACHE_ALIGNMENT
> +#endif
> +
> +#endif /* ENABLE_HW_SNOOPING */
> +
> +
> +/* HELPER MACROS */
> +
> +/* Align base to alignment 'a' */
> +#define MV643XX_ALIGN(b, a) ((((uint32_t)(b)) + (a)-1) & (~((a)-1)))
> +
> +#define NOOP() do {} while(0)
> +
> +/* Function like macros */
> +#define MV_READ(off) \
> + ld_le32((volatile uint32_t *)(BSP_MV64x60_BASE + (off)))
> +#define MV_WRITE(off, data) \
> + st_le32((volatile uint32_t *)(BSP_MV64x60_BASE + (off)),
> ((unsigned)data))
> +
> +
> +/* ENET window mapped 1:1 to CPU addresses by our BSP/MotLoad
> + * -- if this is changed, we should think about caching the 'next' and
> 'buf' pointers.
> + */
> +#define CPUADDR2ENET(a) ((Dma_addr_t)(a))
> +#define ENET2CPUADDR(a) (a)
> +
> +#if 1 /* Whether to automatically try to reclaim descriptors when
> enqueueing new packets */
> +#define MVETH_CLEAN_ON_SEND(mp) (BSP_mve_swipe_tx(mp))
> +#else
> +#define MVETH_CLEAN_ON_SEND(mp) (-1)
> +#endif
> +
> +#define NEXT_TXD(d) (d)->next
> +#define NEXT_RXD(d) (d)->next
> +
> +/* REGISTER AND DESCRIPTOR OFFSET AND BIT DEFINITIONS */
> +
> +/* Descriptor Definitions */
> +/* Rx descriptor */
> +#define RDESC_ERROR
> (1<< 0) /* Error summary */
> +
> +/* Error code (bit 1&2) is only valid if summary bit is set */
> +#define RDESC_CRC_ERROR
> ( 1)
> +#define RDESC_OVERRUN_ERROR
> ( 3)
> +#define RDESC_MAX_FRAMELENGTH_ERROR ( 5)
> +#define RDESC_RESOURCE_ERROR ( 7)
> +
> +#define RDESC_LAST
> (1<<26) /* Last Descriptor */
> +#define RDESC_FRST
> (1<<27) /* First Descriptor */
> +#define RDESC_INT_ENA
> (1<<29) /* Enable Interrupts */
> +#define RDESC_DMA_OWNED
> (1<<31)
> +
> +/* Tx descriptor */
> +#define TDESC_ERROR
> (1<< 0) /* Error summary */
> +#define TDESC_ZERO_PAD
> (1<<19)
> +#define TDESC_LAST
> (1<<20) /* Last Descriptor */
> +#define TDESC_FRST
> (1<<21) /* First Descriptor */
> +#define TDESC_GEN_CRC
> (1<<22)
> +#define TDESC_INT_ENA
> (1<<23) /* Enable Interrupts */
> +#define TDESC_DMA_OWNED
> (1<<31)
> +
> +
> +
> +/* Register Definitions */
> +#define MV643XX_ETH_PHY_ADDR_R (0x2000)
> +#define MV643XX_ETH_SMI_R
> (0x2004)
> +#define MV643XX_ETH_SMI_BUSY (1<<28)
> +#define MV643XX_ETH_SMI_VALID (1<<27)
> +#define MV643XX_ETH_SMI_OP_WR (0<<26)
> +#define MV643XX_ETH_SMI_OP_RD (1<<26)
> +
> +#define MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(port) (0x2448 + ((port)<<10))
> +#define MV643XX_ETH_TX_START(queue)
> (0x0001<<(queue))
> +#define MV643XX_ETH_TX_STOP(queue)
> (0x0100<<(queue))
> +#define MV643XX_ETH_TX_START_M(queues) ((queues)&0xff)
> +#define MV643XX_ETH_TX_STOP_M(queues)
> (((queues)&0xff)<<8)
> +#define MV643XX_ETH_TX_STOP_ALL
> (0xff00)
> +#define MV643XX_ETH_TX_ANY_RUNNING (0x00ff)
> +
> +#define MV643XX_ETH_RECEIVE_QUEUE_COMMAND_R(port) (0x2680 + ((port)<<10))
> +#define MV643XX_ETH_RX_START(queue)
> (0x0001<<(queue))
> +#define MV643XX_ETH_RX_STOP(queue)
> (0x0100<<(queue))
> +#define MV643XX_ETH_RX_STOP_ALL
> (0xff00)
> +#define MV643XX_ETH_RX_ANY_RUNNING (0x00ff)
> +
> +#define MV643XX_ETH_CURRENT_SERVED_TX_DESC(port) (0x2684 + ((port)<<10))
> +
> +/* The chip puts the ethernet header at offset 2 into the buffer so
> + * that the payload is aligned
> + */
> +#define ETH_RX_OFFSET
> 2
> +#define ETH_CRC_LEN
> 4 /* strip FCS at end of packet */
> +
> +
> +#define MV643XX_ETH_INTERRUPT_CAUSE_R(port) (0x2460 +
> ((port)<<10))
> +/* not fully understood; RX seems to raise 0x0005 or 0x0c05 if last buffer
> is filled and 0x0c00
> + * if there are no buffers
> + */
> +#define MV643XX_ETH_ALL_IRQS
> (0x0007ffff)
> +#define MV643XX_ETH_KNOWN_IRQS
> (0x00000c05)
> +#define MV643XX_ETH_IRQ_EXT_ENA
> (1<<1)
> +#define MV643XX_ETH_IRQ_RX_DONE
> (1<<2)
> +#define MV643XX_ETH_IRQ_RX_NO_DESC (1<<10)
> +
> +#define MV643XX_ETH_INTERRUPT_EXTEND_CAUSE_R(port) (0x2464 + ((port)<<10))
> +/* not fully understood; TX seems to raise 0x0001 and link change is 0x00010000
> + * if there are no buffers
> + */
> +#define MV643XX_ETH_ALL_EXT_IRQS
> (0x0011ffff)
> +#define MV643XX_ETH_KNOWN_EXT_IRQS
> (0x00010101)
> +#define MV643XX_ETH_EXT_IRQ_TX_DONE (1<<0)
> +#define MV643XX_ETH_EXT_IRQ_LINK_CHG (1<<16)
> +#define MV643XX_ETH_INTERRUPT_ENBL_R(port) (0x2468 +
> ((port)<<10))
> +#define MV643XX_ETH_INTERRUPT_EXTEND_ENBL_R(port) (0x246c + ((port)<<10))
> +
> +/* port configuration */
> +#define MV643XX_ETH_PORT_CONFIG_R(port)
> (0x2400 + ((port)<<10))
> +#define MV643XX_ETH_UNICAST_PROMISC_MODE (1<<0)
> +#define MV643XX_ETH_DFLT_RX_Q(q)
> ((q)<<1)
> +#define MV643XX_ETH_DFLT_RX_ARP_Q(q) ((q)<<4)
> +#define MV643XX_ETH_REJ_BCAST_IF_NOT_IP_OR_ARP (1<<7)
> +#define MV643XX_ETH_REJ_BCAST_IF_IP (1<<8)
> +#define MV643XX_ETH_REJ_BCAST_IF_ARP (1<<9)
> +#define MV643XX_ETH_TX_AM_NO_UPDATE_ERR_SUMMARY (1<<12)
> +#define MV643XX_ETH_CAPTURE_TCP_FRAMES_ENBL (1<<14)
> +#define MV643XX_ETH_CAPTURE_UDP_FRAMES_ENBL (1<<15)
> +#define MV643XX_ETH_DFLT_RX_TCP_Q(q)
> ((q)<<16)
> +#define MV643XX_ETH_DFLT_RX_UDP_Q(q)
> ((q)<<19)
> +#define MV643XX_ETH_DFLT_RX_BPDU_Q(q)
> ((q)<<22)
> +
> +
> +
> +#define MV643XX_ETH_PORT_CONFIG_XTEND_R(port) (0x2404 + ((port)<<10))
> +#define MV643XX_ETH_CLASSIFY_ENBL (1<<0)
> +#define MV643XX_ETH_SPAN_BPDU_PACKETS_AS_NORMAL (0<<1)
> +#define MV643XX_ETH_SPAN_BPDU_PACKETS_2_Q7 (1<<1)
> +#define MV643XX_ETH_PARTITION_DISBL (0<<2)
> +#define MV643XX_ETH_PARTITION_ENBL (1<<2)
> +
> +#define MV643XX_ETH_SDMA_CONFIG_R(port)
> (0x241c + ((port)<<10))
> +#define MV643XX_ETH_SDMA_RIFB (1<<0)
> +#define MV643XX_ETH_RX_BURST_SZ_1_64BIT (0<<1)
> +#define MV643XX_ETH_RX_BURST_SZ_2_64BIT (1<<1)
> +#define MV643XX_ETH_RX_BURST_SZ_4_64BIT (2<<1)
> +#define MV643XX_ETH_RX_BURST_SZ_8_64BIT (3<<1)
> +#define MV643XX_ETH_RX_BURST_SZ_16_64BIT (4<<1)
> +#define MV643XX_ETH_SMDA_BLM_RX_NO_SWAP (1<<4)
> +#define MV643XX_ETH_SMDA_BLM_TX_NO_SWAP (1<<5)
> +#define MV643XX_ETH_SMDA_DESC_BYTE_SWAP (1<<6)
> +#define MV643XX_ETH_TX_BURST_SZ_1_64BIT (0<<22)
> +#define MV643XX_ETH_TX_BURST_SZ_2_64BIT (1<<22)
> +#define MV643XX_ETH_TX_BURST_SZ_4_64BIT (2<<22)
> +#define MV643XX_ETH_TX_BURST_SZ_8_64BIT (3<<22)
> +#define MV643XX_ETH_TX_BURST_SZ_16_64BIT (4<<22)
> +
> +#define MV643XX_ETH_RX_MIN_FRAME_SIZE_R(port) (0x247c +
> ((port)<<10))
> +
> +
> +#define MV643XX_ETH_SERIAL_CONTROL_R(port) (0x243c +
> ((port)<<10))
> +#define MV643XX_ETH_SERIAL_PORT_ENBL (1<<0) /*
> Enable serial port */
> +#define MV643XX_ETH_FORCE_LINK_PASS (1<<1)
> +#define MV643XX_ETH_DISABLE_AUTO_NEG_FOR_DUPLEX (1<<2)
> +#define MV643XX_ETH_DISABLE_AUTO_NEG_FOR_FLOWCTL (1<<3)
> +#define MV643XX_ETH_ADVERTISE_SYMMETRIC_FLOWCTL (1<<4)
> +#define MV643XX_ETH_FORCE_FC_MODE_TX_PAUSE_DIS (1<<5)
> +#define MV643XX_ETH_FORCE_BP_MODE_JAM_TX (1<<7)
> +#define MV643XX_ETH_FORCE_BP_MODE_JAM_TX_ON_RX_ERR (1<<8)
> +#define MV643XX_ETH_BIT9_UNKNOWN
> (1<<9) /* unknown purpose; linux sets this */
> +#define MV643XX_ETH_FORCE_LINK_FAIL_DISABLE (1<<10)
> +#define MV643XX_ETH_RETRANSMIT_FOREVER (1<<11) /*
> limit to 16 attempts if clear */
> +#define MV643XX_ETH_DISABLE_AUTO_NEG_SPEED_GMII (1<<13)
> +#define MV643XX_ETH_DTE_ADV_1 (1<<14)
> +#define MV643XX_ETH_AUTO_NEG_BYPASS_ENBL (1<<15)
> +#define MV643XX_ETH_RESTART_AUTO_NEG (1<<16)
> +#define MV643XX_ETH_SC_MAX_RX_1518
> (0<<17) /* Limit RX packet size */
> +#define MV643XX_ETH_SC_MAX_RX_1522
> (1<<17) /* Limit RX packet size */
> +#define MV643XX_ETH_SC_MAX_RX_1552
> (2<<17) /* Limit RX packet size */
> +#define MV643XX_ETH_SC_MAX_RX_9022
> (3<<17) /* Limit RX packet size */
> +#define MV643XX_ETH_SC_MAX_RX_9192
> (4<<17) /* Limit RX packet size */
> +#define MV643XX_ETH_SC_MAX_RX_9700
> (5<<17) /* Limit RX packet size */
> +#define MV643XX_ETH_SC_MAX_RX_MASK
> (7<<17) /* bitmask */
> +#define MV643XX_ETH_SET_EXT_LOOPBACK (1<<20)
> +#define MV643XX_ETH_SET_FULL_DUPLEX (1<<21)
> +#define MV643XX_ETH_ENBL_FLOWCTL_TX_RX_IN_FD (1<<22) /* enable
> flow ctrl on rx and tx in full-duplex */
> +#define MV643XX_ETH_SET_GMII_SPEED_1000
> (1<<23) /* 10/100 if clear */
> +#define MV643XX_ETH_SET_MII_SPEED_100 (1<<24) /*
> 10 if clear */
> +
> +#define MV643XX_ETH_PORT_STATUS_R(port)
> (0x2444 + ((port)<<10))
> +
> +#define MV643XX_ETH_PORT_STATUS_MODE_10_BIT (1<<0)
> +#define MV643XX_ETH_PORT_STATUS_LINK_UP (1<<1)
> +#define MV643XX_ETH_PORT_STATUS_FDX (1<<2)
> +#define MV643XX_ETH_PORT_STATUS_FC (1<<3)
> +#define MV643XX_ETH_PORT_STATUS_1000 (1<<4)
> +#define MV643XX_ETH_PORT_STATUS_100 (1<<5)
> +/* PSR bit 6 unknown */
> +#define MV643XX_ETH_PORT_STATUS_TX_IN_PROGRESS (1<<7)
> +#define MV643XX_ETH_PORT_STATUS_ANEG_BYPASSED (1<<8)
> +#define MV643XX_ETH_PORT_STATUS_PARTITION (1<<9)
> +#define MV643XX_ETH_PORT_STATUS_TX_FIFO_EMPTY (1<<10)
> +
> +#define MV643XX_ETH_MIB_COUNTERS(port) (0x3000 +
> ((port)<<7))
> +#define MV643XX_ETH_NUM_MIB_COUNTERS 32
> +
> +#define MV643XX_ETH_MIB_GOOD_OCTS_RCVD_LO (0)
> +#define MV643XX_ETH_MIB_GOOD_OCTS_RCVD_HI (1<<2)
> +#define MV643XX_ETH_MIB_BAD_OCTS_RCVD (2<<2)
> +#define MV643XX_ETH_MIB_INTERNAL_MAC_TX_ERR (3<<2)
> +#define MV643XX_ETH_MIB_GOOD_FRAMES_RCVD (4<<2)
> +#define MV643XX_ETH_MIB_BAD_FRAMES_RCVD (5<<2)
> +#define MV643XX_ETH_MIB_BCAST_FRAMES_RCVD (6<<2)
> +#define MV643XX_ETH_MIB_MCAST_FRAMES_RCVD (7<<2)
> +#define MV643XX_ETH_MIB_FRAMES_64_OCTS (8<<2)
> +#define MV643XX_ETH_MIB_FRAMES_65_127_OCTS (9<<2)
> +#define MV643XX_ETH_MIB_FRAMES_128_255_OCTS (10<<2)
> +#define MV643XX_ETH_MIB_FRAMES_256_511_OCTS (11<<2)
> +#define MV643XX_ETH_MIB_FRAMES_512_1023_OCTS (12<<2)
> +#define MV643XX_ETH_MIB_FRAMES_1024_MAX_OCTS (13<<2)
> +#define MV643XX_ETH_MIB_GOOD_OCTS_SENT_LO (14<<2)
> +#define MV643XX_ETH_MIB_GOOD_OCTS_SENT_HI (15<<2)
> +#define MV643XX_ETH_MIB_GOOD_FRAMES_SENT (16<<2)
> +#define MV643XX_ETH_MIB_EXCESSIVE_COLL (17<<2)
> +#define MV643XX_ETH_MIB_MCAST_FRAMES_SENT (18<<2)
> +#define MV643XX_ETH_MIB_BCAST_FRAMES_SENT (19<<2)
> +#define MV643XX_ETH_MIB_UNREC_MAC_CTRL_RCVD (20<<2)
> +#define MV643XX_ETH_MIB_FC_SENT
> (21<<2)
> +#define MV643XX_ETH_MIB_GOOD_FC_RCVD (22<<2)
> +#define MV643XX_ETH_MIB_BAD_FC_RCVD (23<<2)
> +#define MV643XX_ETH_MIB_UNDERSIZE_RCVD (24<<2)
> +#define MV643XX_ETH_MIB_FRAGMENTS_RCVD (25<<2)
> +#define MV643XX_ETH_MIB_OVERSIZE_RCVD (26<<2)
> +#define MV643XX_ETH_MIB_JABBER_RCVD (27<<2)
> +#define MV643XX_ETH_MIB_MAC_RX_ERR (28<<2)
> +#define MV643XX_ETH_MIB_BAD_CRC_EVENT (29<<2)
> +#define MV643XX_ETH_MIB_COLL (30<<2)
> +#define MV643XX_ETH_MIB_LATE_COLL (31<<2)
> +
> +#define MV643XX_ETH_DA_FILTER_SPECL_MCAST_TBL(port) (0x3400+((port)<<10))
> +#define MV643XX_ETH_DA_FILTER_OTHER_MCAST_TBL(port) (0x3500+((port)<<10))
> +#define MV643XX_ETH_DA_FILTER_UNICAST_TBL(port)
> (0x3600+((port)<<10))
> +#define MV643XX_ETH_NUM_MCAST_ENTRIES 64
> +#define MV643XX_ETH_NUM_UNICAST_ENTRIES 4
> +
> +#define MV643XX_ETH_BAR_0
> (0x2200)
> +#define MV643XX_ETH_SIZE_R_0 (0x2204)
> +#define MV643XX_ETH_BAR_1
> (0x2208)
> +#define MV643XX_ETH_SIZE_R_1 (0x220c)
> +#define MV643XX_ETH_BAR_2
> (0x2210)
> +#define MV643XX_ETH_SIZE_R_2 (0x2214)
> +#define MV643XX_ETH_BAR_3
> (0x2218)
> +#define MV643XX_ETH_SIZE_R_3 (0x221c)
> +#define MV643XX_ETH_BAR_4
> (0x2220)
> +#define MV643XX_ETH_SIZE_R_4 (0x2224)
> +#define MV643XX_ETH_BAR_5
> (0x2228)
> +#define MV643XX_ETH_SIZE_R_5 (0x222c)
> +#define MV643XX_ETH_NUM_BARS 6
> +
> +/* Bits in the BAR reg to program cache snooping */
> +#define MV64360_ENET2MEM_SNOOP_NONE 0x0000
> +#define MV64360_ENET2MEM_SNOOP_WT 0x1000
> +#define MV64360_ENET2MEM_SNOOP_WB 0x2000
> +#define MV64360_ENET2MEM_SNOOP_MSK 0x3000
> +
> +
> +#define MV643XX_ETH_BAR_ENBL_R (0x2290)
> +#define MV643XX_ETH_BAR_DISABLE(bar) (1<<(bar))
> +#define MV643XX_ETH_BAR_DISBL_ALL 0x3f
> +
> +#define MV643XX_ETH_RX_Q0_CURRENT_DESC_PTR(port) (0x260c+((port)<<10))
> +#define MV643XX_ETH_RX_Q1_CURRENT_DESC_PTR(port) (0x261c+((port)<<10))
> +#define MV643XX_ETH_RX_Q2_CURRENT_DESC_PTR(port) (0x262c+((port)<<10))
> +#define MV643XX_ETH_RX_Q3_CURRENT_DESC_PTR(port) (0x263c+((port)<<10))
> +#define MV643XX_ETH_RX_Q4_CURRENT_DESC_PTR(port) (0x264c+((port)<<10))
> +#define MV643XX_ETH_RX_Q5_CURRENT_DESC_PTR(port) (0x265c+((port)<<10))
> +#define MV643XX_ETH_RX_Q6_CURRENT_DESC_PTR(port) (0x266c+((port)<<10))
> +#define MV643XX_ETH_RX_Q7_CURRENT_DESC_PTR(port) (0x267c+((port)<<10))
> +
> +#define MV643XX_ETH_TX_Q0_CURRENT_DESC_PTR(port) (0x26c0+((port)<<10))
> +#define MV643XX_ETH_TX_Q1_CURRENT_DESC_PTR(port) (0x26c4+((port)<<10))
> +#define MV643XX_ETH_TX_Q2_CURRENT_DESC_PTR(port) (0x26c8+((port)<<10))
> +#define MV643XX_ETH_TX_Q3_CURRENT_DESC_PTR(port) (0x26cc+((port)<<10))
> +#define MV643XX_ETH_TX_Q4_CURRENT_DESC_PTR(port) (0x26d0+((port)<<10))
> +#define MV643XX_ETH_TX_Q5_CURRENT_DESC_PTR(port) (0x26d4+((port)<<10))
> +#define MV643XX_ETH_TX_Q6_CURRENT_DESC_PTR(port) (0x26d8+((port)<<10))
> +#define MV643XX_ETH_TX_Q7_CURRENT_DESC_PTR(port) (0x26dc+((port)<<10))
> +
> +#define MV643XX_ETH_MAC_ADDR_LO(port)
> (0x2414+((port)<<10))
> +#define MV643XX_ETH_MAC_ADDR_HI(port)
> (0x2418+((port)<<10))
> +
> +/* TYPE DEFINITIONS */
> +
> +/* just to make the purpose explicit; vars of this
> + * type may need CPU-dependent address translation,
> + * endian conversion etc.
> + */
> +typedef uint32_t Dma_addr_t;
> +
> +typedef volatile struct mveth_rx_desc {
> +#ifndef __BIG_ENDIAN__
> +#error "descriptor declaration not implemented for little endian machines"
> +#endif
> + uint16_t byte_cnt;
> + uint16_t buf_size;
> + uint32_t cmd_sts; /*
> control and status */
> + Dma_addr_t next_desc_ptr; /* next
> descriptor (as seen from DMA) */
> + Dma_addr_t buf_ptr;
> + /* fields below here are not used by the chip */
> + void *u_buf; /*
> user buffer */
> + volatile struct mveth_rx_desc *next; /* next descriptor (CPU
> address; next_desc_ptr is a DMA address) */
> + uint32_t pad[2];
> +} __attribute__(( aligned(RING_ALIGNMENT) )) MvEthRxDescRec, *MvEthRxDesc;
> +
> +typedef volatile struct mveth_tx_desc {
> +#ifndef __BIG_ENDIAN__
> +#error "descriptor declaration not implemented for little endian machines"
> +#endif
> + uint16_t byte_cnt;
> + uint16_t l4i_chk;
> + uint32_t cmd_sts; /*
> control and status */
> + Dma_addr_t next_desc_ptr; /* next
> descriptor (as seen from DMA) */
> + Dma_addr_t buf_ptr;
> + /* fields below here are not used by the chip */
> + uint32_t workaround[2]; /* use this
> space to work around the 8byte problem (is this real?) */
> + void *u_buf; /*
> user buffer */
> + volatile struct mveth_tx_desc *next; /* next descriptor (CPU
> address; next_desc_ptr is a DMA address) */
> +} __attribute__(( aligned(RING_ALIGNMENT) )) MvEthTxDescRec, *MvEthTxDesc;
> +
> +/* Assume there are never more then 64k aliasing entries */
> +typedef uint16_t Mc_Refcnt[MV643XX_ETH_NUM_MCAST_ENTRIES*4];
> +
> +/* driver private data and bsdnet interface structure */
> +struct mveth_private {
> + MvEthRxDesc rx_ring;
> /* pointers to aligned ring area */
> + MvEthTxDesc tx_ring;
> /* pointers to aligned ring area */
> + MvEthRxDesc ring_area;
> /* allocated ring area */
> + int rbuf_count, xbuf_count; /*
> saved ring sizes from ifconfig */
> + int port_num;
> + int phy;
> + MvEthRxDesc d_rx_t;
> /* tail of the RX ring; next received packet */
> + MvEthTxDesc d_tx_t, d_tx_h;
> + uint32_t rx_desc_dma, tx_desc_dma; /* ring
> address as seen by DMA; (1:1 on this BSP) */
> + int avail;
> + void (*isr)(void*);
> + void *isr_arg;
> + /* Callbacks to handle buffers */
> + void (*cleanup_txbuf)(void*, void*, int); /*
> callback to cleanup TX buffer */
> + void *cleanup_txbuf_arg;
> + void *(*alloc_rxbuf)(int *psize, uintptr_t
> *paddr); /* allocate RX buffer */
> + void (*consume_rxbuf)(void*, void*, int); /*
> callback to consume RX buffer */
> + void *consume_rxbuf_arg;
> + rtems_id tid;
> + uint32_t irq_mask;
> /* IRQs we use */
> + uint32_t xirq_mask;
> + int promisc;
> + struct {
> + unsigned irqs;
> + unsigned maxchain;
> + unsigned repack;
> + unsigned packet;
> + unsigned odrops;
> /* no counter in core code */
> + struct {
> + uint64_t good_octs_rcvd; /* 64-bit */
> + uint32_t bad_octs_rcvd;
> + uint32_t internal_mac_tx_err;
> + uint32_t good_frames_rcvd;
> + uint32_t bad_frames_rcvd;
> + uint32_t bcast_frames_rcvd;
> + uint32_t mcast_frames_rcvd;
> + uint32_t frames_64_octs;
> + uint32_t frames_65_127_octs;
> + uint32_t frames_128_255_octs;
> + uint32_t frames_256_511_octs;
> + uint32_t frames_512_1023_octs;
> + uint32_t frames_1024_max_octs;
> + uint64_t good_octs_sent; /* 64-bit */
> + uint32_t good_frames_sent;
> + uint32_t excessive_coll;
> + uint32_t mcast_frames_sent;
> + uint32_t bcast_frames_sent;
> + uint32_t unrec_mac_ctrl_rcvd;
> + uint32_t fc_sent;
> + uint32_t good_fc_rcvd;
> + uint32_t bad_fc_rcvd;
> + uint32_t undersize_rcvd;
> + uint32_t fragments_rcvd;
> + uint32_t oversize_rcvd;
> + uint32_t jabber_rcvd;
> + uint32_t mac_rx_err;
> + uint32_t bad_crc_event;
> + uint32_t coll;
> + uint32_t late_coll;
> + } mib;
> + } stats;
> + struct {
> + Mc_Refcnt specl, other;
> + } mc_refcnt;
> +};
> +
> +/* stuff needed for bsdnet support */
> +struct mveth_bsdsupp {
> + int oif_flags;
> /* old / cached if_flags */
> +};
> +
> +struct mveth_softc {
> + struct arpcom arpcom;
> + struct mveth_bsdsupp bsd;
> + struct mveth_private pvt;
> +};
> +
> +/* GLOBAL VARIABLES */
> +#ifdef MVETH_DEBUG_TX_DUMP
> +int mveth_tx_dump = 0;
> +#endif
> +
> +/* THE array of driver/bsdnet structs */
> +
> +/* If detaching/module unloading is enabled, the main driver data
> + * structure must remain in memory; hence it must reside in its own
> + * 'dummy' module...
> + */
> +#ifdef MVETH_DETACH_HACK
> +extern
> +#else
> +STATIC
> +#endif
> +struct mveth_softc theMvEths[MV643XXETH_NUM_DRIVER_SLOTS]
> +#ifndef MVETH_DETACH_HACK
> += {{{{0}},}}
> +#endif
> +;
> +
> +/* daemon task id */
> +STATIC rtems_id mveth_tid = 0;
> +/* register access protection mutex */
> +STATIC rtems_id mveth_mtx = 0;
> +#define REGLOCK() do { \
> + if ( RTEMS_SUCCESSFUL != rtems_semaphore_obtain(mveth_mtx,
> RTEMS_WAIT, RTEMS_NO_TIMEOUT) ) \
> + rtems_panic(DRVNAME": unable to lock register
> protection mutex"); \
> + } while (0)
> +#define REGUNLOCK() rtems_semaphore_release(mveth_mtx)
> +
> +/* Format strings for statistics messages */
> +static const char *mibfmt[] = {
> + " GOOD_OCTS_RCVD: %"PRIu64"\n",
> + 0,
> + " BAD_OCTS_RCVD: %"PRIu32"\n",
> + " INTERNAL_MAC_TX_ERR: %"PRIu32"\n",
> + " GOOD_FRAMES_RCVD: %"PRIu32"\n",
> + " BAD_FRAMES_RCVD: %"PRIu32"\n",
> + " BCAST_FRAMES_RCVD: %"PRIu32"\n",
> + " MCAST_FRAMES_RCVD: %"PRIu32"\n",
> + " FRAMES_64_OCTS: %"PRIu32"\n",
> + " FRAMES_65_127_OCTS: %"PRIu32"\n",
> + " FRAMES_128_255_OCTS: %"PRIu32"\n",
> + " FRAMES_256_511_OCTS: %"PRIu32"\n",
> + " FRAMES_512_1023_OCTS:%"PRIu32"\n",
> + " FRAMES_1024_MAX_OCTS:%"PRIu32"\n",
> + " GOOD_OCTS_SENT: %"PRIu64"\n",
> + 0,
> + " GOOD_FRAMES_SENT: %"PRIu32"\n",
> + " EXCESSIVE_COLL: %"PRIu32"\n",
> + " MCAST_FRAMES_SENT: %"PRIu32"\n",
> + " BCAST_FRAMES_SENT: %"PRIu32"\n",
> + " UNREC_MAC_CTRL_RCVD: %"PRIu32"\n",
> + " FC_SENT: %"PRIu32"\n",
> + " GOOD_FC_RCVD: %"PRIu32"\n",
> + " BAD_FC_RCVD: %"PRIu32"\n",
> + " UNDERSIZE_RCVD: %"PRIu32"\n",
> + " FRAGMENTS_RCVD: %"PRIu32"\n",
> + " OVERSIZE_RCVD: %"PRIu32"\n",
> + " JABBER_RCVD: %"PRIu32"\n",
> + " MAC_RX_ERR: %"PRIu32"\n",
> + " BAD_CRC_EVENT: %"PRIu32"\n",
> + " COLL: %"PRIu32"\n",
> + " LATE_COLL: %"PRIu32"\n",
> +};
> +
> +/* Interrupt Handler Connection */
> +
> +/* forward decls + implementation for IRQ API funcs */
> +
> +static void mveth_isr(rtems_irq_hdl_param unit);
> +static void mveth_isr_1(rtems_irq_hdl_param unit);
> +static void noop(const rtems_irq_connect_data *unused) {}
> +static int noop1(const rtems_irq_connect_data *unused) { return 0; }
> +
> +static rtems_irq_connect_data irq_data[MAX_NUM_SLOTS] = {
> + {
> + BSP_IRQ_ETH0,
> + 0,
> + (rtems_irq_hdl_param)0,
> + noop,
> + noop,
> + noop1
> + },
> + {
> + BSP_IRQ_ETH1,
> + 0,
> + (rtems_irq_hdl_param)1,
> + noop,
> + noop,
> + noop1
> + },
> + {
> + BSP_IRQ_ETH2,
> + 0,
> + (rtems_irq_hdl_param)2,
> + noop,
> + noop,
> + noop1
> + },
> +};
> +
> +/* MII Ioctl Interface */
> +
> +STATIC unsigned
> +mveth_mii_read(struct mveth_private *mp, unsigned addr);
> +
> +STATIC unsigned
> +mveth_mii_write(struct mveth_private *mp, unsigned addr, unsigned v);
> +
> +
> +/* mdio / mii interface wrappers for rtems_mii_ioctl API */
> +
> +static int mveth_mdio_r(int phy, void *uarg, unsigned reg, uint32_t *pval)
> +{
> + if ( phy > 1 )
> + return -1;
> +
> + *pval = mveth_mii_read(uarg, reg);
> + return 0;
> +}
> +
> +static int mveth_mdio_w(int phy, void *uarg, unsigned reg, uint32_t val)
> +{
> + if ( phy > 1 )
> + return -1;
> + mveth_mii_write(uarg, reg, val);
> + return 0;
> +}
> +
> +static struct rtems_mdio_info mveth_mdio = {
> + mdio_r: mveth_mdio_r,
> + mdio_w: mveth_mdio_w,
> + has_gmii: 1,
> +};
> +
> +/* LOW LEVEL SUPPORT ROUTINES */
> +
> +/* Software Cache Coherency */
> +#ifndef ENABLE_HW_SNOOPING
> +#ifndef __PPC__
> +#error "Software cache coherency maintenance is not implemented for your
> CPU architecture"
> +#endif
> +
> +static inline unsigned INVAL_DESC(volatile void *d)
> +{
> +typedef const char cache_line[PPC_CACHE_ALIGNMENT];
> + asm volatile("dcbi 0, %1":"=m"(*(cache_line*)d):"r"(d));
> + return (unsigned)d; /* so this can be used in comma expression */
> +}
> +
> +static inline void FLUSH_DESC(volatile void *d)
> +{
> +typedef const char cache_line[PPC_CACHE_ALIGNMENT];
> + asm volatile("dcbf 0, %0"::"r"(d),"m"(*(cache_line*)d));
> +}
> +
> +static inline void FLUSH_BARRIER(void)
> +{
> + asm volatile("eieio");
> +}
> +
> +/* RX buffers are always cache-line aligned
> + * ASSUMPTIONS:
> + * - 'addr' is cache aligned
> + * - len is a multiple >0 of cache lines
> + */
> +static inline void INVAL_BUF(register uintptr_t addr, register int len)
> +{
> +typedef char maxbuf[2048]; /* more than an ethernet packet */
> + do {
> + len -= RX_BUF_ALIGNMENT;
> + asm volatile("dcbi %0, %1"::"b"(addr),"r"(len));
> + } while (len > 0);
> + asm volatile("":"=m"(*(maxbuf*)addr));
> +}
> +
> +/* Flushing TX buffers is a little bit trickier; we don't really know their
> + * alignment but *assume* adjacent addresses are covering 'ordinary' memory
> + * so that flushing them does no harm!
> + */
> +static inline void FLUSH_BUF(register uintptr_t addr, register int len)
> +{
> + asm volatile("":::"memory");
> + len = MV643XX_ALIGN(len, RX_BUF_ALIGNMENT);
> + do {
> + asm volatile("dcbf %0, %1"::"b"(addr),"r"(len));
> + len -= RX_BUF_ALIGNMENT;
> + } while ( len >= 0 );
> +}
> +
> +#else /* hardware snooping enabled */
> +
> +/* inline this to silence compiler warnings */
> +static inline int INVAL_DESC(volatile void *d)
> +{ return 0; }
> +
> +#define FLUSH_DESC(d) NOOP()
> +#define INVAL_BUF(b,l) NOOP()
> +#define FLUSH_BUF(b,l) NOOP()
> +#define FLUSH_BARRIER() NOOP()
> +
> +#endif /* cache coherency support */
> +
> +/* Synchronize memory access */
> +#ifdef __PPC__
> +static inline void membarrier(void)
> +{
> + asm volatile("sync":::"memory");
> +}
> +#else
> +#error "memory barrier instruction not defined (yet) for this CPU"
> +#endif
> +
> +/* Enable and disable interrupts at the device */
> +static inline void
> +mveth_enable_irqs(struct mveth_private *mp, uint32_t mask)
> +{
> +rtems_interrupt_level l;
> +uint32_t val;
> + rtems_interrupt_disable(l);
> +
> + val = MV_READ(MV643XX_ETH_INTERRUPT_ENBL_R(mp->port_num));
> + val = (val | mask | MV643XX_ETH_IRQ_EXT_ENA) & mp->irq_mask;
> +
> + MV_WRITE(MV643XX_ETH_INTERRUPT_ENBL_R(mp->port_num), val);
> +
> + val = MV_READ(MV643XX_ETH_INTERRUPT_EXTEND_ENBL_R(mp->port_num));
> + val = (val | mask) & mp->xirq_mask;
> + MV_WRITE(MV643XX_ETH_INTERRUPT_EXTEND_ENBL_R(mp->port_num), val);
> +
> + rtems_interrupt_enable(l);
> +}
> +
> +static inline uint32_t
> +mveth_disable_irqs(struct mveth_private *mp, uint32_t mask)
> +{
> +rtems_interrupt_level l;
> +uint32_t val,xval,tmp;
> + rtems_interrupt_disable(l);
> +
> + val = MV_READ(MV643XX_ETH_INTERRUPT_ENBL_R(mp->port_num));
> + tmp = ( (val & ~mask) | MV643XX_ETH_IRQ_EXT_ENA ) & mp->irq_mask;
> + MV_WRITE(MV643XX_ETH_INTERRUPT_ENBL_R(mp->port_num), tmp);
> +
> + xval = MV_READ(MV643XX_ETH_INTERRUPT_EXTEND_ENBL_R(mp->port_num));
> + tmp = (xval & ~mask) & mp->xirq_mask;
> + MV_WRITE(MV643XX_ETH_INTERRUPT_EXTEND_ENBL_R(mp->port_num), tmp);
> +
> + rtems_interrupt_enable(l);
> +
> + return (val | xval);
> +}
> +
> +/* This should be safe even w/o turning off interrupts if multiple
> + * threads ack different bits in the cause register (and ignore
> + * other ones) since writing 'ones' into the cause register doesn't
> + * 'stick'.
> + */
> +
> +static inline uint32_t
> +mveth_ack_irqs(struct mveth_private *mp, uint32_t mask)
> +{
> +register uint32_t x,xe,p;
> +
> + p = mp->port_num;
> + /* Get cause */
> + x = MV_READ(MV643XX_ETH_INTERRUPT_CAUSE_R(p));
> +
> + /* Ack interrupts filtering the ones we're interested in */
> +
> + /* Note: EXT_IRQ bit clears by itself if EXT interrupts are
> cleared */
> + MV_WRITE(MV643XX_ETH_INTERRUPT_CAUSE_R(p), ~ (x &
> mp->irq_mask & mask));
> +
> + /* linux driver tests 1<<1 as a summary bit
> for extended interrupts;
> + * the mv64360 seems to use 1<<19 for that
> purpose; for the moment,
> + * I just check both.
> + * Update: link status irq (1<<16 in xe)
> doesn't set (1<<19) in x!
> + */
> + if ( 1 /* x & 2 */ )
> + {
> + xe = MV_READ(MV643XX_ETH_INTERRUPT_EXTEND_CAUSE_R(p));
> +
> + MV_WRITE(MV643XX_ETH_INTERRUPT_EXTEND_CAUSE_R(p), ~
> (xe & mp->xirq_mask & mask));
> + } else {
> + xe = 0;
> + }
> +#ifdef MVETH_TESTING
> + if ( ((x & MV643XX_ETH_ALL_IRQS) & ~MV643XX_ETH_KNOWN_IRQS)
> + || ((xe & MV643XX_ETH_ALL_EXT_IRQS) &
> ~MV643XX_ETH_KNOWN_EXT_IRQS) ) {
> + fprintf(stderr, "Unknown IRQs detected; leaving all
> disabled for debugging:\n");
> + fprintf(stderr, "Cause reg was 0x%08x, ext cause
> 0x%08x\n", x, xe);
> + mp->irq_mask = 0;
> + mp->xirq_mask = 0;
> + }
> +#endif
> + /* luckily, the extended and 'normal' interrupts we use
> don't overlap so
> + * we can just OR them into a single word
> + */
> + return (xe & mp->xirq_mask) | (x & mp->irq_mask);
> +}
> +
> +static void mveth_isr(rtems_irq_hdl_param arg)
> +{
> +unsigned unit = (unsigned)arg;
> + mveth_disable_irqs(&theMvEths[unit].pvt, -1);
> + theMvEths[unit].pvt.stats.irqs++;
> + rtems_bsdnet_event_send( theMvEths[unit].pvt.tid, 1<<unit );
> +}
> +
> +static void mveth_isr_1(rtems_irq_hdl_param arg)
> +{
> +unsigned unit = (unsigned)arg;
> +struct mveth_private *mp = &theMvEths[unit].pvt;
> +
> + mp->stats.irqs++;
> + mp->isr(mp->isr_arg);
> +}
> +
> +static void
> +mveth_clear_mib_counters(struct mveth_private *mp)
> +{
> +register int i;
> +register uint32_t b;
> + /* reading the counters resets them */
> + b = MV643XX_ETH_MIB_COUNTERS(mp->port_num);
> + for (i=0; i< MV643XX_ETH_NUM_MIB_COUNTERS; i++, b+=4)
> + (void)MV_READ(b);
> +}
> +
> +/* Reading a MIB register also clears it. Hence we read the lo
> + * register first, then the hi one. Correct reading is guaranteed since
> + * the 'lo' register cannot overflow after it is read since it had
> + * been reset to 0.
> + */
> +static unsigned long long
> +read_long_mib_counter(int port_num, int idx)
> +{
> +unsigned long lo;
> +unsigned long long hi;
> + lo = MV_READ(MV643XX_ETH_MIB_COUNTERS(port_num)+(idx<<2));
> + idx++;
> + hi = MV_READ(MV643XX_ETH_MIB_COUNTERS(port_num)+(idx<<2));
> + return (hi<<32) | lo;
> +}
> +
> +static inline unsigned long
> +read_mib_counter(int port_num, int idx)
> +{
> + return MV_READ(MV643XX_ETH_MIB_COUNTERS(port_num)+(idx<<2));
> +}
> +
> +
> +/* write ethernet address from buffer to hardware (need to change unicast
> filter after this) */
> +static void
> +mveth_write_eaddr(struct mveth_private *mp, unsigned char *eaddr)
> +{
> +int i;
> +uint32_t x;
> +
> + /* build hi word */
> + for (i=4,x=0; i; i--, eaddr++) {
> + x = (x<<8) | *eaddr;
> + }
> + MV_WRITE(MV643XX_ETH_MAC_ADDR_HI(mp->port_num), x);
> +
> + /* build lo word */
> + for (i=2,x=0; i; i--, eaddr++) {
> + x = (x<<8) | *eaddr;
> + }
> + MV_WRITE(MV643XX_ETH_MAC_ADDR_LO(mp->port_num), x);
> +}
> +
> +/* PHY/MII Interface
> + *
> + * Read/write a PHY register;
> + *
> + * NOTE: The SMI register is shared among the three devices.
> + * Protection is provided by the global networking semaphore.
> + * If non-bsd drivers are running on a subset of IFs proper
> + * locking of all shared registers must be implemented!
> + */
> +STATIC unsigned
> +mveth_mii_read(struct mveth_private *mp, unsigned addr)
> +{
> +unsigned v;
> +unsigned wc = 0;
> +
> + addr &= 0x1f;
> +
> + /* wait until not busy */
> + do {
> + v = MV_READ(MV643XX_ETH_SMI_R);
> + wc++;
> + } while ( MV643XX_ETH_SMI_BUSY & v );
> +
> + MV_WRITE(MV643XX_ETH_SMI_R, (addr <<21 ) | (mp->phy<<16) |
> MV643XX_ETH_SMI_OP_RD );
> +
> + do {
> + v = MV_READ(MV643XX_ETH_SMI_R);
> + wc++;
> + } while ( MV643XX_ETH_SMI_BUSY & v );
> +
> + if (wc>0xffff)
> + wc = 0xffff;
> + return (wc<<16) | (v & 0xffff);
> +}
> +
> +STATIC unsigned
> +mveth_mii_write(struct mveth_private *mp, unsigned addr, unsigned v)
> +{
> +unsigned wc = 0;
> +
> + addr &= 0x1f;
> + v &= 0xffff;
> +
> + /* busywait is ugly but not preventing ISRs or high priority tasks from
> + * preempting us
> + */
> +
> + /* wait until not busy */
> + while ( MV643XX_ETH_SMI_BUSY & MV_READ(MV643XX_ETH_SMI_R) )
> + wc++ /* wait */;
> +
> + MV_WRITE(MV643XX_ETH_SMI_R, (addr <<21 ) | (mp->phy<<16) |
> MV643XX_ETH_SMI_OP_WR | v );
> +
> + return wc;
> +}
> +
> +/* MID-LAYER SUPPORT ROUTINES */
> +
> +/* Start TX if descriptors are exhausted */
> +static __inline__ void
> +mveth_start_tx(struct mveth_private *mp)
> +{
> +uint32_t running;
> + if ( mp->avail <= 0 ) {
> + running =
> MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(mp->port_num));
> + if ( ! (running & MV643XX_ETH_TX_START(0)) ) {
> +
> MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_TX_START(0));
> + }
> + }
> +}
> +
> +/* Stop TX and wait for the command queues to stop and the fifo to drain */
> +static uint32_t
> +mveth_stop_tx(int port)
> +{
> +uint32_t active_q;
> +
> + active_q = (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(port)) &
> MV643XX_ETH_TX_ANY_RUNNING);
> +
> + if ( active_q ) {
> + /* Halt TX and wait for activity to stop */
> + MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(port),
> MV643XX_ETH_TX_STOP_ALL);
> + while ( MV643XX_ETH_TX_ANY_RUNNING &
> MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(port)) )
> + /* poll-wait */;
> + /* Wait for Tx FIFO to drain */
> + while ( ! (MV643XX_ETH_PORT_STATUS_R(port) &
> MV643XX_ETH_PORT_STATUS_TX_FIFO_EMPTY) )
> + /* poll-wait */;
> + }
> +
> + return active_q;
> +}
> +
> +/* update serial port settings from current link status */
> +static void
> +mveth_update_serial_port(struct mveth_private *mp, int media)
> +{
> +int port = mp->port_num;
> +uint32_t old, new;
> +
> + new = old = MV_READ(MV643XX_ETH_SERIAL_CONTROL_R(port));
> +
> + /* mask speed and duplex settings */
> + new &= ~( MV643XX_ETH_SET_GMII_SPEED_1000
> + | MV643XX_ETH_SET_MII_SPEED_100
> + | MV643XX_ETH_SET_FULL_DUPLEX );
> +
> + if ( IFM_FDX & media )
> + new |= MV643XX_ETH_SET_FULL_DUPLEX;
> +
> + switch ( IFM_SUBTYPE(media) ) {
> + default: /* treat as 10 */
> + break;
> + case IFM_100_TX:
> + new |= MV643XX_ETH_SET_MII_SPEED_100;
> + break;
> + case IFM_1000_T:
> + new |= MV643XX_ETH_SET_GMII_SPEED_1000;
> + break;
> + }
> +
> + if ( new != old ) {
> + if ( ! (MV643XX_ETH_SERIAL_PORT_ENBL & new) ) {
> + /* just write */
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(port), new);
> + } else {
> + uint32_t were_running;
> +
> + were_running = mveth_stop_tx(port);
> +
> + old &= ~MV643XX_ETH_SERIAL_PORT_ENBL;
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(port), old);
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(port), new);
> + /* linux driver writes twice... */
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(port), new);
> +
> + if ( were_running ) {
> +
> MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_TX_START(0));
> + }
> + }
> + }
> +}
> +
> +/* Clear multicast filters */
> +void
> +BSP_mve_mcast_filter_clear(struct mveth_private *mp)
> +{
> +int i;
> +register uint32_t s,o;
> +uint32_t v = mp->promisc ? 0x01010101 : 0x00000000;
> + s = MV643XX_ETH_DA_FILTER_SPECL_MCAST_TBL(mp->port_num);
> + o = MV643XX_ETH_DA_FILTER_OTHER_MCAST_TBL(mp->port_num);
> + for (i=0; i<MV643XX_ETH_NUM_MCAST_ENTRIES; i++) {
> + MV_WRITE(s,v);
> + MV_WRITE(o,v);
> + s+=4;
> + o+=4;
> + }
> + for (i=0;
> i<sizeof(mp->mc_refcnt.specl)/sizeof(mp->mc_refcnt.specl[0]); i++) {
> + mp->mc_refcnt.specl[i] = 0;
> + mp->mc_refcnt.other[i] = 0;
> + }
> +}
> +
> +void
> +BSP_mve_mcast_filter_accept_all(struct mveth_private *mp)
> +{
> +int i;
> +register uint32_t s,o;
> + s = MV643XX_ETH_DA_FILTER_SPECL_MCAST_TBL(mp->port_num);
> + o = MV643XX_ETH_DA_FILTER_OTHER_MCAST_TBL(mp->port_num);
> + for (i=0; i<MV643XX_ETH_NUM_MCAST_ENTRIES; i++) {
> + MV_WRITE(s,0x01010101);
> + MV_WRITE(o,0x01010101);
> + s+=4;
> + o+=4;
> + /* Not clear what we should do with the reference count.
> + * For now just increment it.
> + */
> + for (i=0;
> i<sizeof(mp->mc_refcnt.specl)/sizeof(mp->mc_refcnt.specl[0]); i++) {
> + mp->mc_refcnt.specl[i]++;
> + mp->mc_refcnt.other[i]++;
> + }
> + }
> +}
> +
> +static void add_entry(uint32_t off, uint8_t hash, Mc_Refcnt *refcnt)
> +{
> +uint32_t val;
> +uint32_t slot = hash & 0xfc;
> +
> + if ( 0 == (*refcnt)[hash]++ ) {
> + val = MV_READ(off+slot) | ( 1 << ((hash&3)<<3) );
> + MV_WRITE(off+slot, val);
> + }
> +}
> +
> +static void del_entry(uint32_t off, uint8_t hash, Mc_Refcnt *refcnt)
> +{
> +uint32_t val;
> +uint32_t slot = hash & 0xfc;
> +
> + if ( (*refcnt)[hash] > 0 && 0 == --(*refcnt)[hash] ) {
> + val = MV_READ(off+slot) & ~( 1 << ((hash&3)<<3) );
> + MV_WRITE(off+slot, val);
> + }
> +}
> +
> +void
> +BSP_mve_mcast_filter_accept_add(struct mveth_private *mp, unsigned char
> *enaddr)
> +{
> +uint32_t hash;
> +static const char spec[]={0x01,0x00,0x5e,0x00,0x00};
> +static const char bcst[]={0xff,0xff,0xff,0xff,0xff,0xff};
> +uint32_t tabl;
> +Mc_Refcnt *refcnt;
> +
> + if ( ! (0x01 & enaddr[0]) ) {
> + /* not a multicast address; ignore */
> + return;
> + }
> +
> + if ( 0 == memcmp(enaddr, bcst, sizeof(bcst)) ) {
> + /* broadcast address; ignore */
> + return;
> + }
> +
> + if ( 0 == memcmp(enaddr, spec, sizeof(spec)) ) {
> + hash = enaddr[5];
> + tabl = MV643XX_ETH_DA_FILTER_SPECL_MCAST_TBL(mp->port_num);
> + refcnt = &mp->mc_refcnt.specl;
> + } else {
> + uint32_t test, mask;
> + int i;
> + /* algorithm used by linux driver */
> + for ( hash=0, i=0; i<6; i++ ) {
> + hash = (hash ^ enaddr[i]) << 8;
> + for ( test=0x8000, mask=0x8380; test>0x0080;
> test>>=1, mask>>=1 ) {
> + if ( hash & test )
> + hash ^= mask;
> + }
> + }
> + tabl = MV643XX_ETH_DA_FILTER_OTHER_MCAST_TBL(mp->port_num);
> + refcnt = &mp->mc_refcnt.other;
> + }
> + add_entry(tabl, hash, refcnt);
> +}
> +
> +void
> +BSP_mve_mcast_filter_accept_del(struct mveth_private *mp, unsigned char
> *enaddr)
> +{
> +uint32_t hash;
> +static const char spec[]={0x01,0x00,0x5e,0x00,0x00};
> +static const char bcst[]={0xff,0xff,0xff,0xff,0xff,0xff};
> +uint32_t tabl;
> +Mc_Refcnt *refcnt;
> +
> + if ( ! (0x01 & enaddr[0]) ) {
> + /* not a multicast address; ignore */
> + return;
> + }
> +
> + if ( 0 == memcmp(enaddr, bcst, sizeof(bcst)) ) {
> + /* broadcast address; ignore */
> + return;
> + }
> +
> + if ( 0 == memcmp(enaddr, spec, sizeof(spec)) ) {
> + hash = enaddr[5];
> + tabl = MV643XX_ETH_DA_FILTER_SPECL_MCAST_TBL(mp->port_num);
> + refcnt = &mp->mc_refcnt.specl;
> + } else {
> + uint32_t test, mask;
> + int i;
> + /* algorithm used by linux driver */
> + for ( hash=0, i=0; i<6; i++ ) {
> + hash = (hash ^ enaddr[i]) << 8;
> + for ( test=0x8000, mask=0x8380; test>0x0080;
> test>>=1, mask>>=1 ) {
> + if ( hash & test )
> + hash ^= mask;
> + }
> + }
> + tabl = MV643XX_ETH_DA_FILTER_OTHER_MCAST_TBL(mp->port_num);
> + refcnt = &mp->mc_refcnt.other;
> + }
> + del_entry(tabl, hash, refcnt);
> +}
> +
> +/* Clear all address filters (multi- and unicast) */
> +static void
> +mveth_clear_addr_filters(struct mveth_private *mp)
> +{
> +register int i;
> +register uint32_t u;
> + u = MV643XX_ETH_DA_FILTER_UNICAST_TBL(mp->port_num);
> + for (i=0; i<MV643XX_ETH_NUM_UNICAST_ENTRIES; i++) {
> + MV_WRITE(u,0);
> + u+=4;
> + }
> + BSP_mve_mcast_filter_clear(mp);
> +}
> +
> +/* Setup unicast filter for a given MAC address (least significant nibble) */
> +static void
> +mveth_ucfilter(struct mveth_private *mp, unsigned char mac_lsbyte, int accept)
> +{
> +unsigned nib, slot, bit;
> +uint32_t val;
> + /* compute slot in table */
> + nib = mac_lsbyte & 0xf; /* strip nibble */
> + slot = nib & ~3; /* (nibble/4)*4 */
> + bit = (nib & 3)<<3; /* 8*(nibble % 4) */
> + val = MV_READ(MV643XX_ETH_DA_FILTER_UNICAST_TBL(mp->port_num) + slot);
> + if ( accept ) {
> + val |= 0x01 << bit;
> + } else {
> + val &= 0x0e << bit;
> + }
> + MV_WRITE(MV643XX_ETH_DA_FILTER_UNICAST_TBL(mp->port_num) + slot, val);
> +}
> +
> +#if defined( ENABLE_TX_WORKAROUND_8_BYTE_PROBLEM ) && 0
> +/* Currently unused; small unaligned buffers seem to be rare
> + * so we just use memcpy()...
> + */
> +
> +/* memcpy for 0..7 bytes; arranged so that gcc
> + * optimizes for powerpc...
> + */
> +
> +static inline void memcpy8(void *to, void *fr, unsigned x)
> +{
> +register uint8_t *d = to, *s = fro;
> +
> + d+=l; s+=l;
> + if ( l & 1 ) {
> + *--d=*--s;
> + }
> + if ( l & 2 ) {
> + /* pre-decrementing causes gcc to use auto-decrementing
> + * PPC instructions (lhzu rx, -2(ry))
> + */
> + d-=2; s-=2;
> + /* use memcpy; don't cast to short -- accessing
> + * misaligned data as short is not portable
> + * (but it works on PPC).
> + */
> + __builtin_memcpy(d,s,2);
> + }
> + if ( l & 4 ) {
> + d-=4; s-=4;
> + /* see above */
> + __builtin_memcpy(d,s,4);
> + }
> +}
> +#endif
> +
> +/* Assign values (buffer + user data) to a tx descriptor slot */
> +static int
> +mveth_assign_desc(MvEthTxDesc d, struct mbuf *m, unsigned long extra)
> +{
> +int rval = (d->byte_cnt = m->m_len);
> +
> +#ifdef MVETH_TESTING
> + assert( !d->mb );
> + assert( m->m_len );
> +#endif
> +
> + /* set CRC on all descriptors; seems to be necessary */
> + d->cmd_sts = extra | (TDESC_GEN_CRC | TDESC_ZERO_PAD);
> +
> +#ifdef ENABLE_TX_WORKAROUND_8_BYTE_PROBLEM
> + /* The buffer must be 64bit aligned if the payload is <8 (??) */
> + if ( rval < 8 && ((mtod(m, uintptr_t)) & 7) ) {
> + d->buf_ptr = CPUADDR2ENET( d->workaround );
> + memcpy((void*)d->workaround, mtod(m, void*), rval);
> + } else
> +#endif
> + {
> + d->buf_ptr = CPUADDR2ENET( mtod(m, unsigned long) );
> + }
> + d->l4i_chk = 0;
> + return rval;
> +}
> +
> +static int
> +mveth_assign_desc_raw(MvEthTxDesc d, void *buf, int len, unsigned long extra)
> +{
> +int rval = (d->byte_cnt = len);
> +
> +#ifdef MVETH_TESTING
> + assert( !d->u_buf );
> + assert( len );
> +#endif
> +
> + /* set CRC on all descriptors; seems to be necessary */
> + d->cmd_sts = extra | (TDESC_GEN_CRC | TDESC_ZERO_PAD);
> +
> +#ifdef ENABLE_TX_WORKAROUND_8_BYTE_PROBLEM
> + /* The buffer must be 64bit aligned if the payload is <8 (??) */
> + if ( rval < 8 && ( ((uintptr_t)buf) & 7) ) {
> + d->buf_ptr = CPUADDR2ENET( d->workaround );
> + memcpy((void*)d->workaround, buf, rval);
> + } else
> +#endif
> + {
> + d->buf_ptr = CPUADDR2ENET( (unsigned long)buf );
> + }
> + d->l4i_chk = 0;
> + return rval;
> +}
> +
> +/*
> + * Ring Initialization
> + *
> + * ENDIAN ASSUMPTION: DMA engine matches CPU endianness (???)
> + *
> + * Linux driver discriminates __LITTLE and __BIG endian for re-arranging
> + * the u16 fields in the descriptor structs. However, no endian conversion
> + * is done on the individual fields (SDMA byte swapping is disabled on LE).
> + */
> +
> +STATIC int
> +mveth_init_rx_desc_ring(struct mveth_private *mp)
> +{
> +int i,sz;
> +MvEthRxDesc d;
> +uintptr_t baddr;
> +
> + memset((void*)mp->rx_ring, 0, sizeof(*mp->rx_ring)*mp->rbuf_count);
> +
> + mp->rx_desc_dma = CPUADDR2ENET(mp->rx_ring);
> +
> + for ( i=0, d = mp->rx_ring; i<mp->rbuf_count; i++, d++ ) {
> + d->u_buf = mp->alloc_rxbuf(&sz, &baddr);
> + assert( d->u_buf );
> +
> +#ifndef ENABLE_HW_SNOOPING
> + /* could reduce the area to max. ethernet packet size */
> + INVAL_BUF(baddr, sz);
> +#endif
> +
> + d->buf_size = sz;
> + d->byte_cnt = 0;
> + d->cmd_sts = RDESC_DMA_OWNED | RDESC_INT_ENA;
> + d->next = mp->rx_ring + (i+1) % mp->rbuf_count;
> +
> + d->buf_ptr = CPUADDR2ENET( baddr );
> + d->next_desc_ptr = CPUADDR2ENET(d->next);
> + FLUSH_DESC(d);
> + }
> + FLUSH_BARRIER();
> +
> + mp->d_rx_t = mp->rx_ring;
> +
> + /* point the chip to the start of the ring */
> +
> MV_WRITE(MV643XX_ETH_RX_Q0_CURRENT_DESC_PTR(mp->port_num),mp->rx_desc_dma);
> +
> +
> + return i;
> +}
> +
> +STATIC int
> +mveth_init_tx_desc_ring(struct mveth_private *mp)
> +{
> +int i;
> +MvEthTxDesc d;
> +
> + memset((void*)mp->tx_ring, 0, sizeof(*mp->tx_ring)*mp->xbuf_count);
> +
> + /* DMA and CPU live in the same address space (rtems) */
> + mp->tx_desc_dma = CPUADDR2ENET(mp->tx_ring);
> + mp->avail = TX_AVAILABLE_RING_SIZE(mp);
> +
> + for ( i=0, d=mp->tx_ring; i<mp->xbuf_count; i++,d++ ) {
> + d->l4i_chk = 0;
> + d->byte_cnt = 0;
> + d->cmd_sts = 0;
> + d->buf_ptr = 0;
> +
> + d->next = mp->tx_ring + (i+1) % mp->xbuf_count;
> + d->next_desc_ptr = CPUADDR2ENET(d->next);
> + FLUSH_DESC(d);
> + }
> + FLUSH_BARRIER();
> +
> + mp->d_tx_h = mp->d_tx_t = mp->tx_ring;
> +
> + /* point the chip to the start of the ring */
> +
> MV_WRITE(MV643XX_ETH_TX_Q0_CURRENT_DESC_PTR(mp->port_num),mp->tx_desc_dma);
> +
> + return i;
> +}
> +
> +/* PUBLIC LOW-LEVEL DRIVER ACCESS */
> +
> +static struct mveth_private *
> +mve_setup_internal(
> + int unit,
> + rtems_id tid,
> + void (*isr)(void*isr_arg),
> + void *isr_arg,
> + void (*cleanup_txbuf)(void *user_buf, void *closure, int
> error_on_tx_occurred),
> + void *cleanup_txbuf_arg,
> + void *(*alloc_rxbuf)(int *p_size, uintptr_t *p_data_addr),
> + void (*consume_rxbuf)(void *user_buf, void *closure, int len),
> + void *consume_rxbuf_arg,
> + int rx_ring_size,
> + int tx_ring_size,
> + int irq_mask
> +)
> +
> +{
> +struct mveth_private *mp;
> +struct ifnet *ifp;
> +int InstallISRSuccessful;
> +
> + if ( unit <= 0 || unit > MV643XXETH_NUM_DRIVER_SLOTS ) {
> + printk(DRVNAME": Bad unit number %i; must be 1..%i\n", unit,
> MV643XXETH_NUM_DRIVER_SLOTS);
> + return 0;
> + }
> + ifp = &theMvEths[unit-1].arpcom.ac_if;
> + if ( ifp->if_init ) {
> + if ( ifp->if_init ) {
> + printk(DRVNAME": instance %i already attached.\n",
> unit);
> + return 0;
> + }
> + }
> +
> + if ( rx_ring_size < 0 && tx_ring_size < 0 )
> + return 0;
> +
> + if ( MV_64360 != BSP_getDiscoveryVersion(0) ) {
> + printk(DRVNAME": not mv64360 chip\n");
> + return 0;
> + }
> +
> + /* lazy init of mutex (non thread-safe! - we assume 1st
> initialization is single-threaded) */
> + if ( ! mveth_mtx ) {
> + rtems_status_code sc;
> + sc = rtems_semaphore_create(
> + rtems_build_name('m','v','e','X'),
> + 1,
> + RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY |
> RTEMS_INHERIT_PRIORITY | RTEMS_DEFAULT_ATTRIBUTES,
> + 0,
> + &mveth_mtx);
> + if ( RTEMS_SUCCESSFUL != sc ) {
> + rtems_error(sc,DRVNAME": creating mutex\n");
> + rtems_panic("unable to proceed\n");
> + }
> + }
> +
> + mp = &theMvEths[unit-1].pvt;
> +
> + memset(mp, 0, sizeof(*mp));
> +
> + mp->port_num = unit-1;
> + mp->phy = (MV_READ(MV643XX_ETH_PHY_ADDR_R) >>
> (5*mp->port_num)) & 0x1f;
> +
> + mp->tid = tid;
> + mp->isr = isr;
> + mp->isr_arg = isr_arg;
> +
> + mp->cleanup_txbuf = cleanup_txbuf;
> + mp->cleanup_txbuf_arg = cleanup_txbuf_arg;
> + mp->alloc_rxbuf = alloc_rxbuf;
> + mp->consume_rxbuf = consume_rxbuf;
> + mp->consume_rxbuf_arg = consume_rxbuf_arg;
> +
> + mp->rbuf_count = rx_ring_size ? rx_ring_size : MV643XX_RX_RING_SIZE;
> + mp->xbuf_count = tx_ring_size ? tx_ring_size : MV643XX_TX_RING_SIZE;
> +
> + if ( mp->xbuf_count > 0 )
> + mp->xbuf_count += TX_NUM_TAG_SLOTS;
> +
> + if ( mp->rbuf_count < 0 )
> + mp->rbuf_count = 0;
> + if ( mp->xbuf_count < 0 )
> + mp->xbuf_count = 0;
> +
> + /* allocate ring area; add 1 entry -- room for alignment */
> + assert( !mp->ring_area );
> + mp->ring_area = malloc(
> + sizeof(*mp->ring_area) *
> +
> (mp->rbuf_count + mp->xbuf_count + 1),
> + M_DEVBUF,
> + M_WAIT );
> + assert( mp->ring_area );
> +
> + BSP_mve_stop_hw(mp);
> +
> + if ( irq_mask ) {
> + irq_data[mp->port_num].hdl = tid ? mveth_isr : mveth_isr_1;
> + InstallISRSuccessful = BSP_install_rtems_irq_handler(
> &irq_data[mp->port_num] );
> + assert( InstallISRSuccessful );
> + }
> +
> + /* mark as used */
> + ifp->if_init = (void*)(-1);
> +
> + if ( rx_ring_size < 0 )
> + irq_mask &= ~ MV643XX_ETH_IRQ_RX_DONE;
> + if ( tx_ring_size < 0 )
> + irq_mask &= ~ MV643XX_ETH_EXT_IRQ_TX_DONE;
> +
> + mp->irq_mask = (irq_mask & MV643XX_ETH_IRQ_RX_DONE);
> + if ( (irq_mask &= (MV643XX_ETH_EXT_IRQ_TX_DONE |
> MV643XX_ETH_EXT_IRQ_LINK_CHG)) ) {
> + mp->irq_mask |= MV643XX_ETH_IRQ_EXT_ENA;
> + mp->xirq_mask = irq_mask;
> + } else {
> + mp->xirq_mask = 0;
> + }
> +
> + return mp;
> +}
> +
> +struct mveth_private *
> +BSP_mve_setup(
> + int unit,
> + rtems_id tid,
> + void (*cleanup_txbuf)(void *user_buf, void *closure, int
> error_on_tx_occurred),
> + void *cleanup_txbuf_arg,
> + void *(*alloc_rxbuf)(int *p_size, uintptr_t *p_data_addr),
> + void (*consume_rxbuf)(void *user_buf, void *closure, int len),
> + void *consume_rxbuf_arg,
> + int rx_ring_size,
> + int tx_ring_size,
> + int irq_mask
> +)
> +{
> + if ( irq_mask && 0 == tid ) {
> + printk(DRVNAME": must supply a TID if irq_msk not zero\n");
> + return 0;
> + }
> +
> + return mve_setup_internal(
> + unit,
> + tid,
> + 0, 0,
> + cleanup_txbuf, cleanup_txbuf_arg,
> + alloc_rxbuf,
> + consume_rxbuf, consume_rxbuf_arg,
> + rx_ring_size, tx_ring_size,
> + irq_mask);
> +}
> +
> +struct mveth_private *
> +BSP_mve_setup_1(
> + int unit,
> + void (*isr)(void *isr_arg),
> + void *isr_arg,
> + void (*cleanup_txbuf)(void *user_buf, void *closure, int
> error_on_tx_occurred),
> + void *cleanup_txbuf_arg,
> + void *(*alloc_rxbuf)(int *p_size, uintptr_t *p_data_addr),
> + void (*consume_rxbuf)(void *user_buf, void *closure, int len),
> + void *consume_rxbuf_arg,
> + int rx_ring_size,
> + int tx_ring_size,
> + int irq_mask
> +)
> +{
> + if ( irq_mask && 0 == isr ) {
> + printk(DRVNAME": must supply an ISR if irq_msk not zero\n");
> + return 0;
> + }
> +
> + return mve_setup_internal(
> + unit,
> + 0,
> + isr, isr_arg,
> + cleanup_txbuf, cleanup_txbuf_arg,
> + alloc_rxbuf,
> + consume_rxbuf, consume_rxbuf_arg,
> + rx_ring_size, tx_ring_size,
> + irq_mask);
> +}
> +
> +rtems_id
> +BSP_mve_get_tid(struct mveth_private *mp)
> +{
> + return mp->tid;
> +}
> +
> +int
> +BSP_mve_detach(struct mveth_private *mp)
> +{
> +int unit = mp->port_num;
> + BSP_mve_stop_hw(mp);
> + if ( mp->irq_mask || mp->xirq_mask ) {
> + if ( !BSP_remove_rtems_irq_handler( &irq_data[mp->port_num] ) )
> + return -1;
> + }
> + free( (void*)mp->ring_area, M_DEVBUF );
> + memset(mp, 0, sizeof(*mp));
> + __asm__ __volatile__("":::"memory");
> + /* mark as unused */
> + theMvEths[unit].arpcom.ac_if.if_init = 0;
> + return 0;
> +}
> +
> +/* MAIN RX-TX ROUTINES
> + *
> + * BSP_mve_swipe_tx(): descriptor scavenger; releases mbufs
> + * BSP_mve_send_buf(): xfer mbufs from IF to chip
> + * BSP_mve_swipe_rx(): enqueue received mbufs to interface
> + * allocate new ones and yield them to the
> + * chip.
> + */
> +
> +/* clean up the TX ring freeing up buffers */
> +int
> +BSP_mve_swipe_tx(struct mveth_private *mp)
> +{
> +int rval = 0;
> +register MvEthTxDesc d;
> +
> + for ( d = mp->d_tx_t; d->buf_ptr; d = NEXT_TXD(d) ) {
> +
> + INVAL_DESC(d);
> +
> + if ( (TDESC_DMA_OWNED & d->cmd_sts)
> + && (uint32_t)d ==
> MV_READ(MV643XX_ETH_CURRENT_SERVED_TX_DESC(mp->port_num)) )
> + break;
> +
> + /* d->u_buf is only set on the last descriptor in a chain;
> + * we only count errors in the last descriptor;
> + */
> + if ( d->u_buf ) {
> + mp->cleanup_txbuf(d->u_buf, mp->cleanup_txbuf_arg,
> (d->cmd_sts & TDESC_ERROR) ? 1 : 0);
> + d->u_buf = 0;
> + }
> +
> + d->buf_ptr = 0;
> +
> + rval++;
> + }
> + mp->d_tx_t = d;
> + mp->avail += rval;
> +
> + return rval;
> +}
> +
> +/* allocate a new cluster and copy an existing chain there;
> + * old chain is released...
> + */
> +static struct mbuf *
> +repackage_chain(struct mbuf *m_head)
> +{
> +struct mbuf *m;
> + MGETHDR(m, M_DONTWAIT, MT_DATA);
> +
> + if ( !m ) {
> + goto bail;
> + }
> +
> + MCLGET(m, M_DONTWAIT);
> +
> + if ( !(M_EXT & m->m_flags) ) {
> + m_freem(m);
> + m = 0;
> + goto bail;
> + }
> +
> + m_copydata(m_head, 0, MCLBYTES, mtod(m, caddr_t));
> + m->m_pkthdr.len = m->m_len = m_head->m_pkthdr.len;
> +
> +bail:
> + m_freem(m_head);
> + return m;
> +}
> +
> +/* Enqueue a mbuf chain or a raw data buffer for transmission;
> + * RETURN: #bytes sent or -1 if there are not enough descriptors
> + *
> + * If 'len' is <=0 then 'm_head' is assumed to point to a mbuf chain.
> + * OTOH, a raw data packet may be send (non-BSD driver) by pointing
> + * m_head to the start of the data and passing 'len' > 0.
> + *
> + * Comments: software cache-flushing incurs a penalty if the
> + * packet cannot be queued since it is flushed anyways.
> + * The algorithm is slightly more efficient in the normal
> + * case, though.
> + */
> +int
> +BSP_mve_send_buf(struct mveth_private *mp, void *m_head, void *data_p, int len)
> +{
> +int rval;
> +register MvEthTxDesc l,d,h;
> +register struct mbuf *m1;
> +int nmbs;
> +int ismbuf = (len <= 0);
> +
> +/* Only way to get here is when we discover that the mbuf chain
> + * is too long for the tx ring
> + */
> +startover:
> +
> + rval = 0;
> +
> +#ifdef MVETH_TESTING
> + assert(m_head);
> +#endif
> +
> + /* if no descriptor is available; try to wipe the queue */
> + if ( (mp->avail < 1) && MVETH_CLEAN_ON_SEND(mp)<=0 ) {
> + /* Maybe TX is stalled and needs to be restarted */
> + mveth_start_tx(mp);
> + return -1;
> + }
> +
> + h = mp->d_tx_h;
> +
> +#ifdef MVETH_TESTING
> + assert( !h->buf_ptr );
> + assert( !h->mb );
> +#endif
> +
> + if ( ! (m1 = m_head) )
> + return 0;
> +
> + if ( ismbuf ) {
> + /* find first mbuf with actual data */
> + while ( 0 == m1->m_len ) {
> + if ( ! (m1 = m1->m_next) ) {
> + /* end reached and still no data to send ?? */
> + m_freem(m_head);
> + return 0;
> + }
> + }
> + }
> +
> + /* Don't use the first descriptor yet because BSP_mve_swipe_tx()
> + * needs mp->d_tx_h->buf_ptr == NULL as a marker. Hence, we
> + * start with the second mbuf and fill the first descriptor
> + * last.
> + */
> +
> + l = h;
> + d = NEXT_TXD(h);
> +
> + mp->avail--;
> +
> + nmbs = 1;
> + if ( ismbuf ) {
> + register struct mbuf *m;
> + for ( m=m1->m_next; m; m=m->m_next ) {
> + if ( 0 == m->m_len )
> + continue; /*
> skip empty mbufs */
> +
> + nmbs++;
> +
> + if ( mp->avail < 1 &&
> MVETH_CLEAN_ON_SEND(mp)<=0 ) {
> + /* Maybe TX was
> stalled - try to restart */
> + mveth_start_tx(mp);
> +
> + /* not enough
> descriptors; cleanup...
> + * the first slot
> was never used, so we start
> + * at mp->d_tx_h->next;
> + */
> + for ( l =
> NEXT_TXD(h); l!=d; l=NEXT_TXD(l) ) {
> +#ifdef MVETH_TESTING
> +
> assert( l->mb == 0 );
> +#endif
> +
> l->buf_ptr = 0;
> +
> l->cmd_sts = 0;
> +
> mp->avail++;
> + }
> + mp->avail++;
> + if ( nmbs >
> TX_AVAILABLE_RING_SIZE(mp) ) {
> + /*
> this chain will never fit into the ring */
> + if (
> nmbs > mp->stats.maxchain )
> +
> mp->stats.maxchain = nmbs;
> +
> mp->stats.repack++;
> + if (
> ! (m_head = repackage_chain(m_head)) ) {
> +
> /* no cluster available */
> +
> mp->stats.odrops++;
> +
> return 0;
> + }
> + goto
> startover;
> + }
> + return -1;
> + }
> +
> + mp->avail--;
> +
> +#ifdef MVETH_TESTING
> + assert( d != h );
> + assert( !d->buf_ptr );
> +#endif
> +
> + /* fill this slot */
> + rval += mveth_assign_desc(d, m,
> TDESC_DMA_OWNED);
> +
> + FLUSH_BUF(mtod(m, uint32_t), m->m_len);
> +
> + l = d;
> + d = NEXT_TXD(d);
> +
> + FLUSH_DESC(l);
> + }
> +
> + /* fill first slot - don't release to DMA yet */
> + rval += mveth_assign_desc(h, m1, TDESC_FRST);
> +
> +
> + FLUSH_BUF(mtod(m1, uint32_t), m1->m_len);
> +
> + } else {
> + /* fill first slot with raw buffer - don't release to DMA yet */
> + rval += mveth_assign_desc_raw(h, data_p, len, TDESC_FRST);
> +
> + FLUSH_BUF( (uint32_t)data_p, len);
> + }
> +
> + /* tag last slot; this covers the case where 1st==last */
> + l->cmd_sts |= TDESC_LAST | TDESC_INT_ENA;
> + /* mbuf goes into last desc */
> + l->u_buf = m_head;
> +
> +
> + FLUSH_DESC(l);
> +
> + /* Tag end; make sure chip doesn't try to read ahead of here! */
> + l->next->cmd_sts = 0;
> + FLUSH_DESC(l->next);
> +
> +#ifdef MVETH_DEBUG_TX_DUMP
> + if ( (mveth_tx_dump & (1<<mp->port_num)) ) {
> + int ll,kk;
> + if ( ismbuf ) {
> + struct mbuf *m;
> + for ( kk=0, m=m_head; m; m=m->m_next) {
> + for ( ll=0; ll<m->m_len; ll++ ) {
> + printf("%02X ",*(mtod(m,char*) + ll));
> + if ( ((++kk)&0xf) == 0 )
> + printf("\n");
> + }
> + }
> + } else {
> + for ( ll=0; ll<len; ) {
> + printf("%02X ",*((char*)data_p + ll));
> + if ( ((++ll)&0xf) == 0 )
> + printf("\n");
> + }
> + }
> + printf("\n");
> + }
> +#endif
> +
> + membarrier();
> +
> + /* turn over the whole chain by flipping ownership of the first desc */
> + h->cmd_sts |= TDESC_DMA_OWNED;
> +
> + FLUSH_DESC(h);
> +
> + membarrier();
> +
> + /* notify the device */
> + MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_TX_START(0));
> +
> + /* Update softc */
> + mp->stats.packet++;
> + if ( nmbs > mp->stats.maxchain )
> + mp->stats.maxchain = nmbs;
> +
> + /* remember new head */
> + mp->d_tx_h = d;
> +
> + return rval; /* #bytes sent */
> +}
> +
> +int
> +BSP_mve_send_buf_raw(
> + struct mveth_private *mp,
> + void *head_p,
> + int h_len,
> + void *data_p,
> + int d_len)
> +{
> +int rval;
> +register MvEthTxDesc l,d,h;
> +int needed;
> +void *frst_buf;
> +int frst_len;
> +
> + rval = 0;
> +
> +#ifdef MVETH_TESTING
> + assert(header || data);
> +#endif
> +
> + needed = head_p && data_p ? 2 : 1;
> +
> + /* if no descriptor is available; try to wipe the queue */
> + if ( ( mp->avail < needed )
> + && ( MVETH_CLEAN_ON_SEND(mp) <= 0 || mp->avail < needed ) ) {
> + /* Maybe TX was stalled and needs a restart */
> + mveth_start_tx(mp);
> + return -1;
> + }
> +
> + h = mp->d_tx_h;
> +
> +#ifdef MVETH_TESTING
> + assert( !h->buf_ptr );
> + assert( !h->mb );
> +#endif
> +
> + /* find the 'first' user buffer */
> + if ( (frst_buf = head_p) ) {
> + frst_len = h_len;
> + } else {
> + frst_buf = data_p;
> + frst_len = d_len;
> + }
> +
> + /* Don't use the first descriptor yet because BSP_mve_swipe_tx()
> + * needs mp->d_tx_h->buf_ptr == NULL as a marker. Hence, we
> + * start with the second (optional) slot and fill the first
> + * descriptor last.
> + */
> +
> + l = h;
> + d = NEXT_TXD(h);
> +
> + mp->avail--;
> +
> + if ( needed > 1 ) {
> + mp->avail--;
> +#ifdef MVETH_TESTING
> + assert( d != h );
> + assert( !d->buf_ptr );
> +#endif
> + rval += mveth_assign_desc_raw(d, data_p, d_len,
> TDESC_DMA_OWNED);
> + FLUSH_BUF( (uint32_t)data_p, d_len );
> + d->u_buf = data_p;
> +
> + l = d;
> + d = NEXT_TXD(d);
> +
> + FLUSH_DESC(l);
> + }
> +
> + /* fill first slot with raw buffer - don't release to DMA yet */
> + rval += mveth_assign_desc_raw(h, frst_buf, frst_len, TDESC_FRST);
> +
> + FLUSH_BUF( (uint32_t)frst_buf, frst_len);
> +
> + /* tag last slot; this covers the case where 1st==last */
> + l->cmd_sts |= TDESC_LAST | TDESC_INT_ENA;
> +
> + /* first buffer of 'chain' goes into last desc */
> + l->u_buf = frst_buf;
> +
> + FLUSH_DESC(l);
> +
> + /* Tag end; make sure chip doesn't try to read ahead of here! */
> + l->next->cmd_sts = 0;
> + FLUSH_DESC(l->next);
> +
> + membarrier();
> +
> + /* turn over the whole chain by flipping ownership of the first desc */
> + h->cmd_sts |= TDESC_DMA_OWNED;
> +
> + FLUSH_DESC(h);
> +
> + membarrier();
> +
> + /* notify the device */
> + MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_TX_START(0));
> +
> + /* Update softc */
> + mp->stats.packet++;
> + if ( needed > mp->stats.maxchain )
> + mp->stats.maxchain = needed;
> +
> + /* remember new head */
> + mp->d_tx_h = d;
> +
> + return rval; /* #bytes sent */
> +}
> +
> +/* send received buffers upwards and replace them
> + * with freshly allocated ones;
> + * ASSUMPTION: buffer length NEVER changes and is set
> + * when the ring is initialized.
> + * TS 20060727: not sure if this assumption is still necessary - I believe
> it isn't.
> + */
> +
> +int
> +BSP_mve_swipe_rx(struct mveth_private *mp)
> +{
> +int rval = 0, err;
> +register MvEthRxDesc d;
> +void *newbuf;
> +int sz;
> +uintptr_t baddr;
> +
> + for ( d = mp->d_rx_t; ! (INVAL_DESC(d), (RDESC_DMA_OWNED &
> d->cmd_sts)); d=NEXT_RXD(d) ) {
> +
> +#ifdef MVETH_TESTING
> + assert(d->u_buf);
> +#endif
> +
> + err = (RDESC_ERROR & d->cmd_sts);
> +
> + if ( err || !(newbuf = mp->alloc_rxbuf(&sz, &baddr)) ) {
> + /* drop packet and recycle buffer */
> + newbuf = d->u_buf;
> + mp->consume_rxbuf(0, mp->consume_rxbuf_arg, err ? -1
> : 0);
> + } else {
> +#ifdef MVETH_TESTING
> + assert( d->byte_cnt > 0 );
> +#endif
> + mp->consume_rxbuf(d->u_buf, mp->consume_rxbuf_arg,
> d->byte_cnt);
> +
> +#ifndef ENABLE_HW_SNOOPING
> + /* could reduce the area to max. ethernet packet size */
> + INVAL_BUF(baddr, sz);
> +#endif
> + d->u_buf = newbuf;
> + d->buf_ptr = CPUADDR2ENET(baddr);
> + d->buf_size = sz;
> + FLUSH_DESC(d);
> + }
> +
> + membarrier();
> +
> + d->cmd_sts = RDESC_DMA_OWNED | RDESC_INT_ENA;
> +
> + FLUSH_DESC(d);
> +
> + rval++;
> + }
> + MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_RX_START(0));
> + mp->d_rx_t = d;
> + return rval;
> +}
> +
> +/* Stop hardware and clean out the rings */
> +void
> +BSP_mve_stop_hw(struct mveth_private *mp)
> +{
> +MvEthTxDesc d;
> +MvEthRxDesc r;
> +int i;
> +
> + mveth_disable_irqs(mp, -1);
> +
> + mveth_stop_tx(mp->port_num);
> +
> + /* cleanup TX rings */
> + if (mp->d_tx_t) { /* maybe ring isn't initialized yet */
> + for ( i=0, d=mp->tx_ring; i<mp->xbuf_count; i++, d++ ) {
> + /* should be safe to clear ownership */
> + d->cmd_sts &= ~TDESC_DMA_OWNED;
> + FLUSH_DESC(d);
> + }
> + FLUSH_BARRIER();
> +
> + BSP_mve_swipe_tx(mp);
> +
> +#ifdef MVETH_TESTING
> + assert( mp->d_tx_h == mp->d_tx_t );
> + for ( i=0, d=mp->tx_ring; i<mp->xbuf_count; i++, d++ ) {
> + assert( !d->buf_ptr );
> + }
> +#endif
> + }
> +
> + MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_RX_STOP_ALL);
> + while ( MV643XX_ETH_RX_ANY_RUNNING &
> MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_R(mp->port_num)) )
> + /* poll-wait */;
> +
> + /* stop serial port */
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(mp->port_num),
> + MV_READ(MV643XX_ETH_SERIAL_CONTROL_R(mp->port_num))
> + & ~( MV643XX_ETH_SERIAL_PORT_ENBL |
> MV643XX_ETH_FORCE_LINK_FAIL_DISABLE | MV643XX_ETH_FORCE_LINK_PASS)
> + );
> +
> + /* clear pending interrupts */
> + MV_WRITE(MV643XX_ETH_INTERRUPT_CAUSE_R(mp->port_num), 0);
> + MV_WRITE(MV643XX_ETH_INTERRUPT_EXTEND_CAUSE_R(mp->port_num), 0);
> +
> + /* cleanup RX rings */
> + if ( mp->rx_ring ) {
> + for ( i=0, r=mp->rx_ring; i<mp->rbuf_count; i++, r++ ) {
> + /* should be OK to clear ownership flag */
> + r->cmd_sts = 0;
> + FLUSH_DESC(r);
> + mp->consume_rxbuf(r->u_buf, mp->consume_rxbuf_arg, 0);
> + r->u_buf = 0;
> + }
> + FLUSH_BARRIER();
> + }
> +
> +
> +}
> +
> +uint32_t mveth_serial_ctrl_config_val = MVETH_SERIAL_CTRL_CONFIG_VAL;
> +
> +/* Fire up the low-level driver
> + *
> + * - make sure hardware is halted
> + * - enable cache snooping
> + * - clear address filters
> + * - clear mib counters
> + * - reset phy
> + * - initialize (or reinitialize) descriptor rings
> + * - check that the firmware has set up a reasonable mac address.
> + * - generate unicast filter entry for our mac address
> + * - write register config values to the chip
> + * - start hardware (serial port and SDMA)
> + */
> +
> +void
> +BSP_mve_init_hw(struct mveth_private *mp, int promisc, unsigned char *enaddr)
> +{
> +int i;
> +uint32_t v;
> +static int inited = 0;
> +
> +#ifdef MVETH_DEBUG
> + printk(DRVNAME"%i: Entering BSP_mve_init_hw()\n", mp->port_num+1);
> +#endif
> +
> + /* since enable/disable IRQ routine only operate on select bitsets
> + * we must make sure everything is masked initially.
> + */
> + MV_WRITE(MV643XX_ETH_INTERRUPT_ENBL_R(mp->port_num), 0);
> + MV_WRITE(MV643XX_ETH_INTERRUPT_EXTEND_ENBL_R(mp->port_num), 0);
> +
> + BSP_mve_stop_hw(mp);
> +
> + memset(&mp->stats, 0, sizeof(mp->stats));
> +
> + mp->promisc = promisc;
> +
> + /* MotLoad has cache snooping disabled on the ENET2MEM windows.
> + * Some comments in (linux) indicate that there are errata
> + * which cause problems which would be a real bummer.
> + * We try it anyways...
> + */
> + if ( !inited ) {
> + unsigned long disbl, bar;
> + inited = 1; /* FIXME: non-thread safe lazy init */
> + disbl = MV_READ(MV643XX_ETH_BAR_ENBL_R);
> + /* disable all 6 windows */
> + MV_WRITE(MV643XX_ETH_BAR_ENBL_R,
> MV643XX_ETH_BAR_DISBL_ALL);
> + /* set WB snooping on enabled bars */
> + for ( i=0; i<MV643XX_ETH_NUM_BARS*8; i+=8 ) {
> + if ( (bar = MV_READ(MV643XX_ETH_BAR_0 + i))
> && MV_READ(MV643XX_ETH_SIZE_R_0 + i) ) {
> +#ifdef ENABLE_HW_SNOOPING
> + MV_WRITE(MV643XX_ETH_BAR_0 + i, bar
> | MV64360_ENET2MEM_SNOOP_WB);
> +#else
> + MV_WRITE(MV643XX_ETH_BAR_0 + i, bar
> & ~MV64360_ENET2MEM_SNOOP_MSK);
> +#endif
> + /* read back to flush fifo [linux
> comment] */
> + (void)MV_READ(MV643XX_ETH_BAR_0 + i);
> + }
> + }
> + /* restore/re-enable */
> + MV_WRITE(MV643XX_ETH_BAR_ENBL_R, disbl);
> + }
> +
> + mveth_clear_mib_counters(mp);
> + mveth_clear_addr_filters(mp);
> +
> +/* Just leave it alone...
> + reset_phy();
> +*/
> +
> + if ( mp->rbuf_count > 0 ) {
> + mp->rx_ring = (MvEthRxDesc)MV643XX_ALIGN(mp->ring_area,
> RING_ALIGNMENT);
> + mveth_init_rx_desc_ring(mp);
> + }
> +
> + if ( mp->xbuf_count > 0 ) {
> + mp->tx_ring = (MvEthTxDesc)mp->rx_ring + mp->rbuf_count;
> + mveth_init_tx_desc_ring(mp);
> + }
> +
> + if ( enaddr ) {
> + /* set ethernet address from arpcom struct */
> +#ifdef MVETH_DEBUG
> + printk(DRVNAME"%i: Writing MAC addr ", mp->port_num+1);
> + for (i=5; i>=0; i--) {
> + printk("%02X%c", enaddr[i], i?':':'\n');
> + }
> +#endif
> + mveth_write_eaddr(mp, enaddr);
> + }
> +
> + /* set mac address and unicast filter */
> +
> + {
> + uint32_t machi, maclo;
> + maclo = MV_READ(MV643XX_ETH_MAC_ADDR_LO(mp->port_num));
> + machi = MV_READ(MV643XX_ETH_MAC_ADDR_HI(mp->port_num));
> + /* ASSUME: firmware has set the mac address for us
> + * - if assertion fails, we have to do more work...
> + */
> + assert( maclo && machi && maclo != 0xffffffff && machi !=
> 0xffffffff );
> + mveth_ucfilter(mp, maclo&0xff, 1/* accept */);
> + }
> +
> + /* port, serial and sdma configuration */
> + v = MVETH_PORT_CONFIG_VAL;
> + if ( promisc ) {
> + /* multicast filters were already set up to
> + * accept everything (mveth_clear_addr_filters())
> + */
> + v |= MV643XX_ETH_UNICAST_PROMISC_MODE;
> + } else {
> + v &= ~MV643XX_ETH_UNICAST_PROMISC_MODE;
> + }
> + MV_WRITE(MV643XX_ETH_PORT_CONFIG_R(mp->port_num),
> + v);
> + MV_WRITE(MV643XX_ETH_PORT_CONFIG_XTEND_R(mp->port_num),
> + MVETH_PORT_XTEND_CONFIG_VAL);
> +
> + v = MV_READ(MV643XX_ETH_SERIAL_CONTROL_R(mp->port_num));
> + v &= ~(MVETH_SERIAL_CTRL_CONFIG_MSK);
> + v |= mveth_serial_ctrl_config_val;
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(mp->port_num), v);
> +
> + i = IFM_MAKEWORD(0, 0, 0, 0);
> + if ( 0 == BSP_mve_media_ioctl(mp, SIOCGIFMEDIA, &i) ) {
> + if ( (IFM_LINK_OK & i) ) {
> + mveth_update_serial_port(mp, i);
> + }
> + }
> +
> + /* enable serial port */
> + v = MV_READ(MV643XX_ETH_SERIAL_CONTROL_R(mp->port_num));
> + MV_WRITE(MV643XX_ETH_SERIAL_CONTROL_R(mp->port_num),
> + v | MV643XX_ETH_SERIAL_PORT_ENBL);
> +
> +#ifndef __BIG_ENDIAN__
> +#error "byte swapping needs to be disabled for little endian machines"
> +#endif
> + MV_WRITE(MV643XX_ETH_SDMA_CONFIG_R(mp->port_num),
> MVETH_SDMA_CONFIG_VAL);
> +
> + /* allow short frames */
> + MV_WRITE(MV643XX_ETH_RX_MIN_FRAME_SIZE_R(mp->port_num),
> MVETH_MIN_FRAMSZ_CONFIG_VAL);
> +
> + MV_WRITE(MV643XX_ETH_INTERRUPT_CAUSE_R(mp->port_num), 0);
> + MV_WRITE(MV643XX_ETH_INTERRUPT_EXTEND_CAUSE_R(mp->port_num), 0);
> + /* TODO: set irq coalescing */
> +
> + /* enable Rx */
> + if ( mp->rbuf_count > 0 ) {
> + MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_R(mp->port_num),
> MV643XX_ETH_RX_START(0));
> + }
> +
> + mveth_enable_irqs(mp, -1);
> +
> +#ifdef MVETH_DEBUG
> + printk(DRVNAME"%i: Leaving BSP_mve_init_hw()\n", mp->port_num+1);
> +#endif
> +}
> +
> +/* read ethernet address from hw to buffer */
> +void
> +BSP_mve_read_eaddr(struct mveth_private *mp, unsigned char *oeaddr)
> +{
> +int i;
> +uint32_t x;
> +unsigned char buf[6], *eaddr;
> +
> + eaddr = oeaddr ? oeaddr : buf;
> +
> + eaddr += 5;
> + x = MV_READ(MV643XX_ETH_MAC_ADDR_LO(mp->port_num));
> +
> + /* lo word */
> + for (i=2; i; i--, eaddr--) {
> + *eaddr = (unsigned char)(x & 0xff);
> + x>>=8;
> + }
> +
> + x = MV_READ(MV643XX_ETH_MAC_ADDR_HI(mp->port_num));
> + /* hi word */
> + for (i=4; i; i--, eaddr--) {
> + *eaddr = (unsigned char)(x & 0xff);
> + x>>=8;
> + }
> +
> + if ( !oeaddr ) {
> + printf("%02X",buf[0]);
> + for (i=1; i<sizeof(buf); i++)
> + printf(":%02X",buf[i]);
> + printf("\n");
> + }
> +}
> +
> +int
> +BSP_mve_media_ioctl(struct mveth_private *mp, int cmd, int *parg)
> +{
> +int rval;
> + /* alias cmd == 0,1 */
> + switch ( cmd ) {
> + case 0: cmd = SIOCGIFMEDIA;
> + break;
> + case 1: cmd = SIOCSIFMEDIA;
> + case SIOCGIFMEDIA:
> + case SIOCSIFMEDIA:
> + break;
> + default: return -1;
> + }
> + REGLOCK();
> + rval = rtems_mii_ioctl(&mveth_mdio, mp, cmd, parg);
> + REGUNLOCK();
> + return rval;
> +}
> +
> +void
> +BSP_mve_enable_irqs(struct mveth_private *mp)
> +{
> + mveth_enable_irqs(mp, -1);
> +}
> +
> +void
> +BSP_mve_disable_irqs(struct mveth_private *mp)
> +{
> + mveth_disable_irqs(mp, -1);
> +}
> +
> +uint32_t
> +BSP_mve_ack_irqs(struct mveth_private *mp)
> +{
> + return mveth_ack_irqs(mp, -1);
> +}
> +
> +
> +void
> +BSP_mve_enable_irq_mask(struct mveth_private *mp, uint32_t mask)
> +{
> + mveth_enable_irqs(mp, mask);
> +}
> +
> +uint32_t
> +BSP_mve_disable_irq_mask(struct mveth_private *mp, uint32_t mask)
> +{
> + return mveth_disable_irqs(mp, mask);
> +}
> +
> +uint32_t
> +BSP_mve_ack_irq_mask(struct mveth_private *mp, uint32_t mask)
> +{
> + return mveth_ack_irqs(mp, mask);
> +}
> +
> +int
> +BSP_mve_ack_link_chg(struct mveth_private *mp, int *pmedia)
> +{
> +int media = IFM_MAKEWORD(0,0,0,0);
> +
> + if ( 0 == BSP_mve_media_ioctl(mp, SIOCGIFMEDIA, &media)) {
> + if ( IFM_LINK_OK & media ) {
> + mveth_update_serial_port(mp, media);
> + /* If TX stalled because there was no buffer then
> whack it */
> + mveth_start_tx(mp);
> + }
> + if ( pmedia )
> + *pmedia = media;
> + return 0;
> + }
> + return -1;
> +}
> +
> +/* BSDNET SUPPORT/GLUE ROUTINES */
> +
> +static void
> +mveth_set_filters(struct ifnet *ifp);
> +
> +STATIC void
> +mveth_stop(struct mveth_softc *sc)
> +{
> + BSP_mve_stop_hw(&sc->pvt);
> + sc->arpcom.ac_if.if_timer = 0;
> +}
> +
> +/* allocate a mbuf for RX with a properly aligned data buffer
> + * RETURNS 0 if allocation fails
> + */
> +static void *
> +alloc_mbuf_rx(int *psz, uintptr_t *paddr)
> +{
> +struct mbuf *m;
> +unsigned long l,o;
> +
> + MGETHDR(m, M_DONTWAIT, MT_DATA);
> + if ( !m )
> + return 0;
> + MCLGET(m, M_DONTWAIT);
> + if ( ! (m->m_flags & M_EXT) ) {
> + m_freem(m);
> + return 0;
> + }
> +
> + o = mtod(m, unsigned long);
> + l = MV643XX_ALIGN(o, RX_BUF_ALIGNMENT) - o;
> +
> + /* align start of buffer */
> + m->m_data += l;
> +
> + /* reduced length */
> + l = MCLBYTES - l;
> +
> + m->m_len = m->m_pkthdr.len = l;
> + *psz = m->m_len;
> + *paddr = mtod(m, uintptr_t);
> +
> + return (void*) m;
> +}
> +
> +static void consume_rx_mbuf(void *buf, void *arg, int len)
> +{
> +struct ifnet *ifp = arg;
> +struct mbuf *m = buf;
> +
> + if ( len <= 0 ) {
> + ifp->if_iqdrops++;
> + if ( len < 0 ) {
> + ifp->if_ierrors++;
> + }
> + if ( m )
> + m_freem(m);
> + } else {
> + struct ether_header *eh;
> +
> + eh = (struct ether_header
> *)(mtod(m, unsigned long) + ETH_RX_OFFSET);
> + m->m_len = m->m_pkthdr.len = len -
> sizeof(struct ether_header) - ETH_RX_OFFSET - ETH_CRC_LEN;
> + m->m_data += sizeof(struct ether_header) +
> ETH_RX_OFFSET;
> + m->m_pkthdr.rcvif = ifp;
> +
> + ifp->if_ipackets++;
> + ifp->if_ibytes += m->m_pkthdr.len;
> +
> + if (0) {
> + /* Low-level debugging */
> + int i;
> + for (i=0; i<13; i++) {
> + printf("%02X:",((char*)eh)[i]);
> + }
> + printf("%02X\n",((char*)eh)[i]);
> + for (i=0; i<m->m_len; i++) {
> + if ( !(i&15) )
> + printf("\n");
> + printf("0x%02x ",mtod(m,char*)[i]);
> + }
> + printf("\n");
> + }
> +
> + if (0) {
> + /* Low-level debugging/testing without bsd
> stack */
> + m_freem(m);
> + } else {
> + /* send buffer upwards */
> + ether_input(ifp, eh, m);
> + }
> + }
> +}
> +
> +static void release_tx_mbuf(void *buf, void *arg, int err)
> +{
> +struct ifnet *ifp = arg;
> +struct mbuf *mb = buf;
> +
> + if ( err ) {
> + ifp->if_oerrors++;
> + } else {
> + ifp->if_opackets++;
> + }
> + ifp->if_obytes += mb->m_pkthdr.len;
> + m_freem(mb);
> +}
> +
> +static void
> +dump_update_stats(struct mveth_private *mp, FILE *f)
> +{
> +int p = mp->port_num;
> +int idx;
> +uint32_t v;
> +
> + if ( !f )
> + f = stdout;
> +
> + fprintf(f, DRVNAME"%i Statistics:\n", mp->port_num + 1);
> + fprintf(f, " # IRQS: %i\n", mp->stats.irqs);
> + fprintf(f, " Max. mbuf chain length: %i\n", mp->stats.maxchain);
> + fprintf(f, " # repacketed: %i\n", mp->stats.repack);
> + fprintf(f, " # packets: %i\n", mp->stats.packet);
> + fprintf(f, "MIB Counters:\n");
> + for ( idx = MV643XX_ETH_MIB_GOOD_OCTS_RCVD_LO>>2;
> + idx < MV643XX_ETH_NUM_MIB_COUNTERS;
> + idx++ ) {
> + switch ( idx ) {
> + case MV643XX_ETH_MIB_GOOD_OCTS_RCVD_LO>>2:
> + mp->stats.mib.good_octs_rcvd +=
> read_long_mib_counter(p, idx);
> + fprintf(f, mibfmt[idx],
> mp->stats.mib.good_octs_rcvd);
> + idx++;
> + break;
> +
> + case MV643XX_ETH_MIB_GOOD_OCTS_SENT_LO>>2:
> + mp->stats.mib.good_octs_sent +=
> read_long_mib_counter(p, idx);
> + fprintf(f, mibfmt[idx],
> mp->stats.mib.good_octs_sent);
> + idx++;
> + break;
> +
> + default:
> + v = ((uint32_t*)&mp->stats.mib)[idx] +=
> read_mib_counter(p, idx);
> + fprintf(f, mibfmt[idx], v);
> + break;
> + }
> + }
> + fprintf(f, "\n");
> +}
> +
> +void
> +BSP_mve_dump_stats(struct mveth_private *mp, FILE *f)
> +{
> + dump_update_stats(mp, f);
> +}
> +
> +/* BSDNET DRIVER CALLBACKS */
> +
> +static void
> +mveth_init(void *arg)
> +{
> +struct mveth_softc *sc = arg;
> +struct ifnet *ifp = &sc->arpcom.ac_if;
> +int media;
> +
> + BSP_mve_init_hw(&sc->pvt, ifp->if_flags & IFF_PROMISC,
> sc->arpcom.ac_enaddr);
> +
> + media = IFM_MAKEWORD(0, 0, 0, 0);
> + if ( 0 == BSP_mve_media_ioctl(&sc->pvt, SIOCGIFMEDIA, &media) ) {
> + if ( (IFM_LINK_OK & media) ) {
> + ifp->if_flags &= ~IFF_OACTIVE;
> + } else {
> + ifp->if_flags |= IFF_OACTIVE;
> + }
> + }
> +
> + /* if promiscuous then there is no need to change */
> + if ( ! (ifp->if_flags & IFF_PROMISC) )
> + mveth_set_filters(ifp);
> +
> + ifp->if_flags |= IFF_RUNNING;
> + sc->arpcom.ac_if.if_timer = 0;
> +}
> +
> +/* bsdnet driver entry to start transmission */
> +static void
> +mveth_start(struct ifnet *ifp)
> +{
> +struct mveth_softc *sc = ifp->if_softc;
> +struct mbuf *m = 0;
> +
> + while ( ifp->if_snd.ifq_head ) {
> + IF_DEQUEUE( &ifp->if_snd, m );
> + if ( BSP_mve_send_buf(&sc->pvt, m, 0, 0) < 0 ) {
> + IF_PREPEND( &ifp->if_snd, m);
> + ifp->if_flags |= IFF_OACTIVE;
> + break;
> + }
> + /* need to do this really only once
> + * but it's cheaper this way.
> + */
> + ifp->if_timer = 2*IFNET_SLOWHZ;
> + }
> +}
> +
> +/* bsdnet driver entry; */
> +static void
> +mveth_watchdog(struct ifnet *ifp)
> +{
> +struct mveth_softc *sc = ifp->if_softc;
> +
> + ifp->if_oerrors++;
> + printk(DRVNAME"%i: watchdog timeout; resetting\n", ifp->if_unit);
> +
> + mveth_init(sc);
> + mveth_start(ifp);
> +}
> +
> +static void
> +mveth_set_filters(struct ifnet *ifp)
> +{
> +struct mveth_softc *sc = ifp->if_softc;
> +uint32_t v;
> +
> + v = MV_READ(MV643XX_ETH_PORT_CONFIG_R(sc->pvt.port_num));
> + if ( ifp->if_flags & IFF_PROMISC )
> + v |= MV643XX_ETH_UNICAST_PROMISC_MODE;
> + else
> + v &= ~MV643XX_ETH_UNICAST_PROMISC_MODE;
> + MV_WRITE(MV643XX_ETH_PORT_CONFIG_R(sc->pvt.port_num), v);
> +
> + if ( ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI) ) {
> + BSP_mve_mcast_filter_accept_all(&sc->pvt);
> + } else {
> + struct ether_multi *enm;
> + struct ether_multistep step;
> +
> + BSP_mve_mcast_filter_clear( &sc->pvt );
> +
> + ETHER_FIRST_MULTI(step, (struct arpcom *)ifp, enm);
> +
> + while ( enm ) {
> + if ( memcmp(enm->enm_addrlo, enm->enm_addrhi,
> ETHER_ADDR_LEN) )
> + assert( !"Should never get here;
> IFF_ALLMULTI should be set!" );
> +
> + BSP_mve_mcast_filter_accept_add(&sc->pvt,
> enm->enm_addrlo);
> +
> + ETHER_NEXT_MULTI(step, enm);
> + }
> + }
> +}
> +
> +/* bsdnet driver ioctl entry */
> +static int
> +mveth_ioctl(struct ifnet *ifp, ioctl_command_t cmd, caddr_t data)
> +{
> +struct mveth_softc *sc = ifp->if_softc;
> +struct ifreq *ifr = (struct ifreq *)data;
> +int error = 0;
> +int f;
> +
> + switch ( cmd ) {
> + case SIOCSIFFLAGS:
> + f = ifp->if_flags;
> + if ( f & IFF_UP ) {
> + if ( ! ( f & IFF_RUNNING ) ) {
> + mveth_init(sc);
> + } else {
> + if ( (f & IFF_PROMISC) !=
> (sc->bsd.oif_flags & IFF_PROMISC) ) {
> + /* Note: in all other
> scenarios the 'promisc' flag
> + * in the low-level driver
> [which affects the way
> + * the multicast filter is
> setup: accept none vs.
> + * accept all in promisc
> mode] is eventually
> + * set when the IF is
> brought up...
> + */
> + sc->pvt.promisc = (f &
> IFF_PROMISC);
> +
> + mveth_set_filters(ifp);
> + }
> + /* FIXME: other flag changes are
> ignored/unimplemented */
> + }
> + } else {
> + if ( f & IFF_RUNNING ) {
> + mveth_stop(sc);
> + ifp->if_flags &= ~(IFF_RUNNING |
> IFF_OACTIVE);
> + }
> + }
> + sc->bsd.oif_flags = ifp->if_flags;
> + break;
> +
> + case SIOCGIFMEDIA:
> + case SIOCSIFMEDIA:
> + error = BSP_mve_media_ioctl(&sc->pvt, cmd,
> &ifr->ifr_media);
> + break;
> +
> + case SIOCADDMULTI:
> + case SIOCDELMULTI:
> + error = (cmd == SIOCADDMULTI)
> + ? ether_addmulti(ifr, &sc->arpcom)
> + : ether_delmulti(ifr, &sc->arpcom);
> +
> + if (error == ENETRESET) {
> + if (ifp->if_flags & IFF_RUNNING) {
> + mveth_set_filters(ifp);
> + }
> + error = 0;
> + }
> + break;
> +
> +
> + break;
> +
> + case SIO_RTEMS_SHOW_STATS:
> + dump_update_stats(&sc->pvt, stdout);
> + break;
> +
> + default:
> + error = ether_ioctl(ifp, cmd, data);
> + break;
> + }
> +
> + return error;
> +}
> +
> +/* DRIVER TASK */
> +
> +/* Daemon task does all the 'interrupt' work */
> +static void mveth_daemon(void *arg)
> +{
> +struct mveth_softc *sc;
> +struct ifnet *ifp;
> +rtems_event_set evs;
> + for (;;) {
> + rtems_bsdnet_event_receive( 7, RTEMS_WAIT | RTEMS_EVENT_ANY,
> RTEMS_NO_TIMEOUT, &evs );
> + evs &= 7;
> + for ( sc = theMvEths; evs; evs>>=1, sc++ ) {
> + if ( (evs & 1) ) {
> + register uint32_t x;
> +
> + ifp = &sc->arpcom.ac_if;
> +
> + if ( !(ifp->if_flags & IFF_UP) ) {
> + mveth_stop(sc);
> + ifp->if_flags &= ~(IFF_UP|IFF_RUNNING);
> + continue;
> + }
> +
> + if ( !(ifp->if_flags & IFF_RUNNING) ) {
> + /* event could have been pending at
> the time hw was stopped;
> + * just ignore...
> + */
> + continue;
> + }
> +
> + x = mveth_ack_irqs(&sc->pvt, -1);
> +
> + if ( MV643XX_ETH_EXT_IRQ_LINK_CHG & x ) {
> + /* phy status changed */
> + int media;
> +
> + if ( 0 ==
> BSP_mve_ack_link_chg(&sc->pvt, &media) ) {
> + if ( IFM_LINK_OK & media ) {
> + ifp->if_flags &=
> ~IFF_OACTIVE;
> + mveth_start(ifp);
> + } else {
> + /* stop sending */
> + ifp->if_flags |=
> IFF_OACTIVE;
> + }
> + }
> + }
> + /* free tx chain */
> + if ( (MV643XX_ETH_EXT_IRQ_TX_DONE & x) &&
> BSP_mve_swipe_tx(&sc->pvt) ) {
> + ifp->if_flags &= ~IFF_OACTIVE;
> + if (
> TX_AVAILABLE_RING_SIZE(&sc->pvt) == sc->pvt.avail )
> + ifp->if_timer = 0;
> + mveth_start(ifp);
> + }
> + if ( (MV643XX_ETH_IRQ_RX_DONE & x) )
> + BSP_mve_swipe_rx(&sc->pvt);
> +
> + mveth_enable_irqs(&sc->pvt, -1);
> + }
> + }
> + }
> +}
> +
> +#ifdef MVETH_DETACH_HACK
> +static int mveth_detach(struct mveth_softc *sc);
> +#endif
> +
> +
> +/* PUBLIC RTEMS BSDNET ATTACH FUNCTION */
> +int
> +rtems_mve_attach(struct rtems_bsdnet_ifconfig *ifcfg, int attaching)
> +{
> +char *unitName;
> +int unit,i,cfgUnits;
> +struct mveth_softc *sc;
> +struct ifnet *ifp;
> +
> + unit = rtems_bsdnet_parse_driver_name(ifcfg, &unitName);
> + if ( unit <= 0 || unit > MV643XXETH_NUM_DRIVER_SLOTS ) {
> + printk(DRVNAME": Bad unit number %i; must be 1..%i\n", unit,
> MV643XXETH_NUM_DRIVER_SLOTS);
> + return 1;
> + }
> +
> + sc = &theMvEths[unit-1];
> + ifp = &sc->arpcom.ac_if;
> + sc->pvt.port_num = unit-1;
> + sc->pvt.phy = (MV_READ(MV643XX_ETH_PHY_ADDR_R) >>
> (5*sc->pvt.port_num)) & 0x1f;
> +
> + if ( attaching ) {
> + if ( ifp->if_init ) {
> + printk(DRVNAME": instance %i already attached.\n",
> unit);
> + return -1;
> + }
> +
> + for ( i=cfgUnits = 0; i<MV643XXETH_NUM_DRIVER_SLOTS; i++ ) {
> + if ( theMvEths[i].arpcom.ac_if.if_init )
> + cfgUnits++;
> + }
> + cfgUnits++; /* this new one */
> +
> + /* lazy init of TID should still be thread-safe because we
> are protected
> + * by the global networking semaphore..
> + */
> + if ( !mveth_tid ) {
> + /* newproc uses the 1st 4 chars of name string to
> build an rtems name */
> + mveth_tid = rtems_bsdnet_newproc("MVEd", 4096,
> mveth_daemon, 0);
> + }
> +
> + if ( !BSP_mve_setup( unit,
> + mveth_tid,
> + release_tx_mbuf, ifp,
> + alloc_mbuf_rx,
> + consume_rx_mbuf, ifp,
> + ifcfg->rbuf_count,
> + ifcfg->xbuf_count,
> + BSP_MVE_IRQ_TX | BSP_MVE_IRQ_RX |
> BSP_MVE_IRQ_LINK) ) {
> + return -1;
> + }
> +
> + if ( nmbclusters < sc->pvt.rbuf_count * cfgUnits + 60 /*
> arbitrary */ ) {
> + printk(DRVNAME"%i: (mv643xx ethernet) Your
> application has not enough mbuf clusters\n", unit);
> + printk( " configured for
> this driver.\n");
> + return -1;
> + }
> +
> + if ( ifcfg->hardware_address ) {
> + memcpy(sc->arpcom.ac_enaddr,
> ifcfg->hardware_address, ETHER_ADDR_LEN);
> + } else {
> + /* read back from hardware assuming that MotLoad
> already had set it up */
> + BSP_mve_read_eaddr(&sc->pvt, sc->arpcom.ac_enaddr);
> + }
> +
> + ifp->if_softc = sc;
> + ifp->if_unit = unit;
> + ifp->if_name = unitName;
> +
> + ifp->if_mtu = ifcfg->mtu ?
> ifcfg->mtu : ETHERMTU;
> +
> + ifp->if_init = mveth_init;
> + ifp->if_ioctl = mveth_ioctl;
> + ifp->if_start = mveth_start;
> + ifp->if_output = ether_output;
> + /*
> + * While nonzero, the 'if->if_timer' is decremented
> + * (by the networking code) at a rate of IFNET_SLOWHZ (1hz)
> and 'if_watchdog'
> + * is called when it expires.
> + * If either of those fields is 0 the feature is disabled.
> + */
> + ifp->if_watchdog = mveth_watchdog;
> + ifp->if_timer = 0;
> +
> + sc->bsd.oif_flags = /* ... */
> + ifp->if_flags = IFF_BROADCAST |
> IFF_MULTICAST | IFF_SIMPLEX;
> +
> + /*
> + * if unset, this set to 10Mbps by ether_ifattach; seems to
> be unused by bsdnet stack;
> + * could be updated along with phy speed, though...
> + ifp->if_baudrate = 10000000;
> + */
> +
> + /* NOTE: ether_output drops packets if ifq_len >= ifq_maxlen
> + * but this is the packet count, not the fragment count!
> + ifp->if_snd.ifq_maxlen = sc->pvt.xbuf_count;
> + */
> + ifp->if_snd.ifq_maxlen = ifqmaxlen;
> +
> +#ifdef MVETH_DETACH_HACK
> + if ( !ifp->if_addrlist ) /* do only the first time [reattach
> hack] */
> +#endif
> + {
> + if_attach(ifp);
> + ether_ifattach(ifp);
> + }
> +
> + } else {
> +#ifdef MVETH_DETACH_HACK
> + if ( !ifp->if_init ) {
> + printk(DRVNAME": instance %i not attached.\n", unit);
> + return -1;
> + }
> + return mveth_detach(sc);
> +#else
> + printk(DRVNAME": interface detaching not implemented\n");
> + return -1;
> +#endif
> + }
> +
> + return 0;
> +}
> +
> +/* EARLY PHY ACCESS */
> +static int
> +mveth_early_init(int idx)
> +{
> + if ( idx < 0 || idx >= MV643XXETH_NUM_DRIVER_SLOTS )
> + return -1;
> +
> + /* determine the phy */
> + theMvEths[idx].pvt.phy = (MV_READ(MV643XX_ETH_PHY_ADDR_R) >>
> (5*idx)) & 0x1f;
> + return 0;
> +}
> +
> +static int
> +mveth_early_read_phy(int idx, unsigned reg)
> +{
> +int rval;
> +
> + if ( idx < 0 || idx >= MV643XXETH_NUM_DRIVER_SLOTS )
> + return -1;
> +
> + rval = mveth_mii_read(&theMvEths[idx].pvt, reg);
> + return rval < 0 ? rval : rval & 0xffff;
> +}
> +
> +static int
> +mveth_early_write_phy(int idx, unsigned reg, unsigned val)
> +{
> + if ( idx < 0 || idx >= MV643XXETH_NUM_DRIVER_SLOTS )
> + return -1;
> +
> + mveth_mii_write(&theMvEths[idx].pvt, reg, val);
> + return 0;
> +}
> +
> +rtems_bsdnet_early_link_check_ops
> +rtems_mve_early_link_check_ops = {
> + init: mveth_early_init,
> + read_phy: mveth_early_read_phy,
> + write_phy: mveth_early_write_phy,
> + name: DRVNAME,
> + num_slots: MAX_NUM_SLOTS
> +};
> +
> +/* DEBUGGING */
> +
> +#ifdef MVETH_DEBUG
> +/* Display/dump descriptor rings */
> +
> +int
> +mveth_dring(struct mveth_softc *sc)
> +{
> +int i;
> +if (1) {
> +MvEthRxDesc pr;
> +printf("RX:\n");
> +
> + for (i=0, pr=sc->pvt.rx_ring; i<sc->pvt.rbuf_count; i++, pr++) {
> +#ifndef ENABLE_HW_SNOOPING
> + /* can't just invalidate the descriptor - if it contains
> + * data that hasn't been flushed yet, we create an
> inconsistency...
> + */
> + rtems_bsdnet_semaphore_obtain();
> + INVAL_DESC(pr);
> +#endif
> + printf("cnt: 0x%04x, size: 0x%04x, stat: 0x%08x, next:
> 0x%08x, buf: 0x%08x\n",
> + pr->byte_cnt, pr->buf_size, pr->cmd_sts,
> (uint32_t)pr->next_desc_ptr, pr->buf_ptr);
> +
> +#ifndef ENABLE_HW_SNOOPING
> + rtems_bsdnet_semaphore_release();
> +#endif
> + }
> +}
> +if (1) {
> +MvEthTxDesc pt;
> +printf("TX:\n");
> + for (i=0, pt=sc->pvt.tx_ring; i<sc->pvt.xbuf_count; i++, pt++) {
> +#ifndef ENABLE_HW_SNOOPING
> + rtems_bsdnet_semaphore_obtain();
> + INVAL_DESC(pt);
> +#endif
> + printf("cnt: 0x%04x, stat: 0x%08x, next: 0x%08x, buf:
> 0x%08x, mb: 0x%08x\n",
> + pt->byte_cnt, pt->cmd_sts,
> (uint32_t)pt->next_desc_ptr, pt->buf_ptr,
> + (uint32_t)pt->mb);
> +
> +#ifndef ENABLE_HW_SNOOPING
> + rtems_bsdnet_semaphore_release();
> +#endif
> + }
> +}
> + return 0;
> +}
> +
> +#endif
> +
> +/* DETACH HACK DETAILS */
> +
> +#ifdef MVETH_DETACH_HACK
> +int
> +_cexpModuleFinalize(void *mh)
> +{
> +int i;
> + for ( i=0; i<MV643XXETH_NUM_DRIVER_SLOTS; i++ ) {
> + if ( theMvEths[i].arpcom.ac_if.if_init ) {
> + printf("Interface %i still attached; refuse to
> unload\n", i+1);
> + return -1;
> + }
> + }
> + /* delete task; since there are no attached interfaces, it should block
> + * for events and hence not hold the semaphore or other resources...
> + */
> + rtems_task_delete(mveth_tid);
> + return 0;
> +}
> +
> +/* ugly hack to allow unloading/reloading the driver core.
> + * needed because rtems' bsdnet release doesn't implement
> + * if_detach(). Therefore, we bring the interface down but
> + * keep the device record alive...
> + */
> +static void
> +ether_ifdetach_pvt(struct ifnet *ifp)
> +{
> + ifp->if_flags = 0;
> + ifp->if_ioctl = 0;
> + ifp->if_start = 0;
> + ifp->if_watchdog = 0;
> + ifp->if_init = 0;
> +}
> +
> +static int
> +mveth_detach(struct mveth_softc *sc)
> +{
> +struct ifnet *ifp = &sc->arpcom.ac_if;
> + if ( ifp->if_init ) {
> + if ( ifp->if_flags & (IFF_UP | IFF_RUNNING) ) {
> + printf(DRVNAME"%i: refuse to detach; interface still
> up\n",sc->pvt.port_num+1);
> + return -1;
> + }
> + mveth_stop(sc);
> +/* not implemented in BSDnet/RTEMS (yet) but declared in header */
> +#define ether_ifdetach ether_ifdetach_pvt
> + ether_ifdetach(ifp);
> + }
> + free( (void*)sc->pvt.ring_area, M_DEVBUF );
> + sc->pvt.ring_area = 0;
> + sc->pvt.tx_ring = 0;
> + sc->pvt.rx_ring = 0;
> + sc->pvt.d_tx_t = sc->pvt.d_tx_h = 0;
> + sc->pvt.d_rx_t = 0;
> + sc->pvt.avail = 0;
> + /* may fail if ISR was not installed yet */
> + BSP_remove_rtems_irq_handler( &irq_data[sc->pvt.port_num] );
> + return 0;
> +}
> +
> +#ifdef MVETH_DEBUG
> +struct rtems_bsdnet_ifconfig mveth_dbg_config = {
> + name: DRVNAME"1",
> + attach: rtems_mve_attach,
> + ip_address: "192.168.2.10", /* not used
> by rtems_bsdnet_attach */
> + ip_netmask: "255.255.255.0", /* not used
> by rtems_bsdnet_attach */
> + hardware_address: 0, /* (void *) */
> + ignore_broadcast: 0, /*
> TODO driver should honour this */
> + mtu: 0,
> + rbuf_count: 0,
> /* TODO driver should honour this */
> + xbuf_count: 0,
> /* TODO driver should honour this */
> +};
> +#endif
> +#endif
> --
> 2.39.3
>
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