diff options
author | Vasanthakumar Thiagarajan <vasanth@atheros.com> | 2010-04-15 17:39:33 -0400 |
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committer | John W. Linville <linville@tuxdriver.com> | 2010-04-16 15:43:47 -0400 |
commit | 4adfcdedd4e0c05c1b659da5f2b8bc4e2d4a86df (patch) | |
tree | 8284739015fbcb27d9f7ff27b5d8853557d7e83b /drivers/net/wireless/ath/ath9k/init.c | |
parent | 3deb4da554c3ad9b059f51d19eebadf8525da4a4 (diff) |
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>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/init.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/init.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 1956c611503..58a87f7931d 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -233,31 +233,37 @@ static int ath9k_reg_notifier(struct wiphy *wiphy, */ 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 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd, 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 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd, 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 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd, } 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 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd, ((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); } |