[PATCH rtems-libbsd 4/7] rtwn_usb: Make sure buffers are cache aligned

[Christian Mauderer]

---
 freebsd/sys/dev/rtwn/usb/rtwn_usb_attach.c | 11 +++++++++++
 freebsd/sys/dev/rtwn/usb/rtwn_usb_tx.c     |  7 +++++++
 2 files changed, 18 insertions(+)

diff --git a/freebsd/sys/dev/rtwn/usb/rtwn_usb_attach.c b/freebsd/sys/dev/rtwn/usb/rtwn_usb_attach.c
index 8626d0a3..fad41f36 100644
--- a/freebsd/sys/dev/rtwn/usb/rtwn_usb_attach.c
+++ b/freebsd/sys/dev/rtwn/usb/rtwn_usb_attach.c
@@ -37,6 +37,10 @@ __FBSDID("$FreeBSD$");
 #include <sys/endian.h>
 #include <sys/linker.h>
 #include <sys/kdb.h>
+#ifdef __rtems__
+#include <machine/rtems-bsd-cache.h>
+#include <rtems/malloc.h>
+#endif /* __rtems__ */
 
 #include <net/if.h>
 #include <net/if_var.h>
@@ -115,7 +119,14 @@ rtwn_usb_alloc_list(struct rtwn_softc *sc, struct rtwn_data data[],
 	for (i = 0; i < ndata; i++) {
 		struct rtwn_data *dp = &data[i];
 		dp->m = NULL;
+#if defined(__rtems__) && defined(CPU_DATA_CACHE_ALIGNMENT)
+		maxsz = maxsz + (CPU_DATA_CACHE_ALIGNMENT - 1) &
+		    ~(CPU_DATA_CACHE_ALIGNMENT - 1);
+		dp->buf = rtems_heap_allocate_aligned_with_boundary(maxsz,
+		    CPU_DATA_CACHE_ALIGNMENT, 0);
+#else /* __rtems__ */
 		dp->buf = malloc(maxsz, M_USBDEV, M_NOWAIT);
+#endif /* __rtems__ */
 		if (dp->buf == NULL) {
 			device_printf(sc->sc_dev,
 			    "could not allocate buffer\n");
diff --git a/freebsd/sys/dev/rtwn/usb/rtwn_usb_tx.c b/freebsd/sys/dev/rtwn/usb/rtwn_usb_tx.c
index 61f0ba43..14762c0c 100644
--- a/freebsd/sys/dev/rtwn/usb/rtwn_usb_tx.c
+++ b/freebsd/sys/dev/rtwn/usb/rtwn_usb_tx.c
@@ -64,6 +64,10 @@ __FBSDID("$FreeBSD$");
 #include <dev/rtwn/usb/rtwn_usb_reg.h>
 #include <dev/rtwn/usb/rtwn_usb_tx.h>
 
+#ifdef __rtems__
+#include <machine/rtems-bsd-cache.h>
+#endif /* __rtems__ */
+
 static struct rtwn_data * _rtwn_usb_getbuf(struct rtwn_usb_softc *);
 static struct rtwn_data * rtwn_usb_getbuf(struct rtwn_usb_softc *);
 static void		rtwn_usb_txeof(struct rtwn_usb_softc *,
@@ -170,6 +174,9 @@ tr_setup:
 		if (data->ni == NULL && RTWN_CHIP_HAS_BCNQ1(sc))
 			rtwn_switch_bcnq(sc, data->id);
 		usbd_xfer_set_frame_data(xfer, 0, data->buf, data->buflen);
+#if defined(__rtems__) && defined(CPU_DATA_CACHE_ALIGNMENT)
+		usbd_xfer_frame_allow_cache_line_blow_up(xfer, 0);
+#endif /* __rtems__ */
 		usbd_transfer_submit(xfer);
 		if (sc->sc_ratectl != RTWN_RATECTL_NET80211)
 			sc->sc_tx_n_active++;
-- 
2.26.2