ath9k: Setup appropriate tx desc for regular dma and edma
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 1956c61..58a87f7 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -233,31 +233,37 @@
*/
int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
struct list_head *head, const char *name,
- int nbuf, int ndesc)
+ int nbuf, int ndesc, bool is_tx)
{
#define DS2PHYS(_dd, _ds) \
((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
#define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
#define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
- struct ath_desc *ds;
+ u8 *ds;
struct ath_buf *bf;
- int i, bsize, error;
+ int i, bsize, error, desc_len;
ath_print(common, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
name, nbuf, ndesc);
INIT_LIST_HEAD(head);
+
+ if (is_tx)
+ desc_len = sc->sc_ah->caps.tx_desc_len;
+ else
+ desc_len = sizeof(struct ath_desc);
+
/* ath_desc must be a multiple of DWORDs */
- if ((sizeof(struct ath_desc) % 4) != 0) {
+ if ((desc_len % 4) != 0) {
ath_print(common, ATH_DBG_FATAL,
"ath_desc not DWORD aligned\n");
- BUG_ON((sizeof(struct ath_desc) % 4) != 0);
+ BUG_ON((desc_len % 4) != 0);
error = -ENOMEM;
goto fail;
}
- dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc;
+ dd->dd_desc_len = desc_len * nbuf * ndesc;
/*
* Need additional DMA memory because we can't use
@@ -270,7 +276,7 @@
u32 dma_len;
while (ndesc_skipped) {
- dma_len = ndesc_skipped * sizeof(struct ath_desc);
+ dma_len = ndesc_skipped * desc_len;
dd->dd_desc_len += dma_len;
ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
@@ -284,7 +290,7 @@
error = -ENOMEM;
goto fail;
}
- ds = dd->dd_desc;
+ ds = (u8 *) dd->dd_desc;
ath_print(common, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
name, ds, (u32) dd->dd_desc_len,
ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
@@ -298,7 +304,7 @@
}
dd->dd_bufptr = bf;
- for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
+ for (i = 0; i < nbuf; i++, bf++, ds += (desc_len * ndesc)) {
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
@@ -314,7 +320,7 @@
((caddr_t) dd->dd_desc +
dd->dd_desc_len));
- ds += ndesc;
+ ds += (desc_len * ndesc);
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
}