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brcm80211: fmac: use sk_buff list for handling frames in receive path 

The functions in the receive patch of the fullmac now use sk_buff
list and skb_queue_xx() functions instead of dealing with list pointers
in the sk_buff directly.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
hifive-unleashed-5.1
Arend van Spriel 2011-10-19 12:51:09 +02:00 committed by John W. Linville
parent 6cddafab54
commit b83db862ff
1 changed files with 33 additions and 29 deletions
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62
drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
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@ -574,7 +574,7 @@ struct brcmf_bus {
uint txminmax;
struct sk_buff *glomd; /* Packet containing glomming descriptor */
struct sk_buff *glom; /* Packet chain for glommed superframe */
struct sk_buff_head glom; /* Packet list for glommed superframe */
uint glomerr; /* Glom packet read errors */
u8 *rxbuf; /* Buffer for receiving control packets */
@ -1229,16 +1229,17 @@ static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_bus *bus, uint len)
struct sk_buff *p;
u8 *buf;
p = bus->glom;
buf = bus->dataptr;
/* copy the data */
for (; p && len; p = p->next) {
skb_queue_walk(&bus->glom, p) {
n = min_t(uint, p->len, len);
memcpy(p->data, buf, n);
buf += n;
len -= n;
ret += n;
if (!len)
break;
}
return ret;
@ -1262,7 +1263,8 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
/* If packets, issue read(s) and send up packet chain */
/* Return sequence numbers consumed? */
brcmf_dbg(TRACE, "start: glomd %p glom %p\n", bus->glomd, bus->glom);
brcmf_dbg(TRACE, "start: glomd %p glom %p\n",
bus->glomd, skb_peek(&bus->glom));
/* If there's a descriptor, generate the packet chain */
if (bus->glomd) {
@ -1309,12 +1311,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
num, sublen);
break;
}
if (!pfirst) {
pfirst = plast = pnext;
} else {
plast->next = pnext;
plast = pnext;
}
skb_queue_tail(&bus->glom, pnext);
/* Adhere to start alignment requirements */
pkt_align(pnext, sublen, BRCMF_SDALIGN);
@ -1330,12 +1327,13 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
bus->nextlen, totlen, rxseq);
}
bus->glom = pfirst;
pfirst = pnext = NULL;
} else {
if (pfirst)
brcmu_pkt_buf_free_skb(pfirst);
bus->glom = NULL;
if (!skb_queue_empty(&bus->glom))
skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
skb_unlink(pfirst, &bus->glom);
brcmu_pkt_buf_free_skb(pfirst);
}
num = 0;
}
@ -1347,17 +1345,17 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
/* Ok -- either we just generated a packet chain,
or had one from before */
if (bus->glom) {
if (!skb_queue_empty(&bus->glom)) {
if (BRCMF_GLOM_ON()) {
brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
for (pnext = bus->glom; pnext; pnext = pnext->next) {
skb_queue_walk(&bus->glom, pnext) {
brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
pnext, (u8 *) (pnext->data),
pnext->len, pnext->len);
}
}
pfirst = bus->glom;
pfirst = skb_peek(&bus->glom);
dlen = (u16) brcmu_pkttotlen(pfirst);
/* Do an SDIO read for the superframe. Configurable iovar to
@ -1401,9 +1399,11 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
} else {
bus->glomerr = 0;
brcmf_sdbrcm_rxfail(bus, true, false);
brcmu_pkt_buf_free_skb(bus->glom);
bus->rxglomfail++;
bus->glom = NULL;
skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
skb_unlink(pfirst, &bus->glom);
brcmu_pkt_buf_free_skb(pfirst);
}
}
return 0;
}
@ -1524,9 +1524,11 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
} else {
bus->glomerr = 0;
brcmf_sdbrcm_rxfail(bus, true, false);
brcmu_pkt_buf_free_skb(bus->glom);
bus->rxglomfail++;
bus->glom = NULL;
skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
skb_unlink(pfirst, &bus->glom);
brcmu_pkt_buf_free_skb(pfirst);
}
}
bus->nextlen = 0;
return 0;
@ -1534,7 +1536,6 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq)
/* Basic SD framing looks ok - process each packet (header) */
save_pfirst = pfirst;
bus->glom = NULL;
plast = NULL;
for (num = 0; pfirst; rxseq++, pfirst = pnext) {
@ -1871,10 +1872,10 @@ brcmf_sdbrcm_readframes(struct brcmf_bus *bus, uint maxframes, bool *finished)
rxseq++, rxleft--) {
/* Handle glomming separately */
if (bus->glom || bus->glomd) {
if (bus->glomd || !skb_queue_empty(&bus->glom)) {
u8 cnt;
brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
bus->glomd, bus->glom);
bus->glomd, skb_peek(&bus->glom));
cnt = brcmf_sdbrcm_rxglom(bus, rxseq);
brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
rxseq += cnt - 1;
@ -3623,6 +3624,8 @@ void brcmf_sdbrcm_bus_stop(struct brcmf_bus *bus)
u8 saveclk;
uint retries;
int err;
struct sk_buff *cur;
struct sk_buff *next;
brcmf_dbg(TRACE, "Enter\n");
@ -3682,11 +3685,11 @@ void brcmf_sdbrcm_bus_stop(struct brcmf_bus *bus)
/* Clear any held glomming stuff */
if (bus->glomd)
brcmu_pkt_buf_free_skb(bus->glomd);
if (bus->glom)
brcmu_pkt_buf_free_skb(bus->glom);
bus->glom = bus->glomd = NULL;
if (!skb_queue_empty(&bus->glom))
skb_queue_walk_safe(&bus->glom, cur, next) {
skb_unlink(cur, &bus->glom);
brcmu_pkt_buf_free_skb(cur);
}
/* Clear rx control and wake any waiters */
bus->rxlen = 0;
@ -4461,6 +4464,7 @@ void *brcmf_sdbrcm_probe(u16 bus_no, u16 slot, u16 func, uint bustype,
bus->sdiodev = sdiodev;
sdiodev->bus = bus;
skb_queue_head_init(&bus->glom);
bus->txbound = BRCMF_TXBOUND;
bus->rxbound = BRCMF_RXBOUND;
bus->txminmax = BRCMF_TXMINMAX;