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brcmfmac: determine alignment values during probe

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The alignment values were being determined for each transmit
and receive depending on platform data. Instead determine
these once during the probe.

Reviewed-by: Franky Lin <frankyl@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Arend van Spriel 2013-11-29 12:25:13 +01:00 committed by John W. Linville
parent f931868d49
commit e217d1c8bf
1 changed files with 24 additions and 24 deletions
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48
drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
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@ -462,6 +462,8 @@ struct brcmf_sdio {
u8 tx_hdrlen; /* sdio bus header length for tx packet */
bool txglom; /* host tx glomming enable flag */
struct sk_buff *txglom_sgpad; /* scatter-gather padding buffer */
u16 head_align; /* buffer pointer alignment */
u16 sgentry_align; /* scatter-gather buffer alignment */
};
/* clkstate */
@ -1313,7 +1315,6 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
{
u16 dlen, totlen;
u8 *dptr, num = 0;
u32 align = 0;
u16 sublen;
struct sk_buff *pfirst, *pnext;
@ -1328,11 +1329,6 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
bus->glomd, skb_peek(&bus->glom));
if (bus->sdiodev->pdata)
align = bus->sdiodev->pdata->sd_sgentry_align;
if (align < 4)
align = 4;
/* If there's a descriptor, generate the packet chain */
if (bus->glomd) {
pfirst = pnext = NULL;
@ -1356,9 +1352,9 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
pnext = NULL;
break;
}
if (sublen % align) {
if (sublen % bus->sgentry_align) {
brcmf_err("sublen %d not multiple of %d\n",
sublen, align);
sublen, bus->sgentry_align);
}
totlen += sublen;
@ -1371,7 +1367,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
}
/* Allocate/chain packet for next subframe */
pnext = brcmu_pkt_buf_get_skb(sublen + align);
pnext = brcmu_pkt_buf_get_skb(sublen + bus->sgentry_align);
if (pnext == NULL) {
brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
num, sublen);
@ -1380,7 +1376,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
skb_queue_tail(&bus->glom, pnext);
/* Adhere to start alignment requirements */
pkt_align(pnext, sublen, align);
pkt_align(pnext, sublen, bus->sgentry_align);
}
/* If all allocations succeeded, save packet chain
@ -1908,18 +1904,13 @@ brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt)
{
u16 head_align, head_pad;
u16 head_pad;
u8 *dat_buf;
/* SDIO ADMA requires at least 32 bit alignment */
head_align = 4;
if (bus->sdiodev->pdata && bus->sdiodev->pdata->sd_head_align > 4)
head_align = bus->sdiodev->pdata->sd_head_align;
dat_buf = (u8 *)(pkt->data);
/* Check head padding */
head_pad = ((unsigned long)dat_buf % head_align);
head_pad = ((unsigned long)dat_buf % bus->head_align);
if (head_pad) {
if (skb_headroom(pkt) < head_pad) {
bus->sdiodev->bus_if->tx_realloc++;
@ -1949,25 +1940,22 @@ static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
{
struct brcmf_sdio_dev *sdiodev;
struct sk_buff *pkt_pad;
u16 tail_pad, tail_chop, sg_align, chain_pad;
u16 tail_pad, tail_chop, chain_pad;
unsigned int blksize;
bool lastfrm;
int ntail, ret;
sdiodev = bus->sdiodev;
blksize = sdiodev->func[SDIO_FUNC_2]->cur_blksize;
sg_align = 4;
if (sdiodev->pdata && sdiodev->pdata->sd_sgentry_align > 4)
sg_align = sdiodev->pdata->sd_sgentry_align;
/* sg entry alignment should be a divisor of block size */
WARN_ON(blksize % sg_align);
WARN_ON(blksize % bus->sgentry_align);
/* Check tail padding */
lastfrm = skb_queue_is_last(pktq, pkt);
tail_pad = 0;
tail_chop = pkt->len % sg_align;
tail_chop = pkt->len % bus->sgentry_align;
if (tail_chop)
tail_pad = sg_align - tail_chop;
tail_pad = bus->sgentry_align - tail_chop;
chain_pad = (total_len + tail_pad) % blksize;
if (lastfrm && chain_pad)
tail_pad += blksize - chain_pad;
@ -4099,6 +4087,18 @@ void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
bus->txminmax = BRCMF_TXMINMAX;
bus->tx_seq = SDPCM_SEQ_WRAP - 1;
/* platform specific configuration:
* alignments must be at least 4 bytes for ADMA
*/
bus->head_align = ALIGNMENT;
bus->sgentry_align = ALIGNMENT;
if (sdiodev->pdata) {
if (sdiodev->pdata->sd_head_align > ALIGNMENT)
bus->head_align = sdiodev->pdata->sd_head_align;
if (sdiodev->pdata->sd_sgentry_align > ALIGNMENT)
bus->sgentry_align = sdiodev->pdata->sd_sgentry_align;
}
INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
if (bus->brcmf_wq == NULL) {