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staging: brcm80211: move sdio resource lock to dhd_sdio.c

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In fullmac the lock is for race condition for sdio interface. Move
the code to dhd_sdio.c

Signed-off-by: Franky Lin <frankyl@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Franky Lin 2011-06-29 16:47:46 -07:00 committed by Greg Kroah-Hartman
parent 08278881d3
commit 0f370346bb
3 changed files with 70 additions and 83 deletions
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6
drivers/staging/brcm80211/brcmfmac/dhd.h
View File

@ -810,10 +810,6 @@ extern uint brcmf_sdiod_drive_strength;
/* Override to force tx queueing all the time */
extern uint brcmf_force_tx_queueing;
/* thread priority for watchdog and dpc */
extern int brcmf_watchdog_prio;
extern int brcmf_dpc_prio;
#ifdef SDTEST
/* Echo packet generator (SDIO), pkts/s */
extern uint brcmf_pktgen;
@ -919,8 +915,6 @@ extern void brcmf_os_set_ioctl_resp_timeout(unsigned int timeout_msec);
extern void *brcmf_os_open_image(char *filename);
extern int brcmf_os_get_image_block(char *buf, int len, void *image);
extern void brcmf_os_close_image(void *image);
extern void brcmf_os_sdlock(dhd_pub_t *pub);
extern void brcmf_os_sdunlock(dhd_pub_t *pub);
extern void brcmf_os_sdlock_sndup_rxq(dhd_pub_t *pub);
extern void brcmf_customer_gpio_wlan_ctrl(int onoff);
extern int brcmf_custom_get_mac_address(unsigned char *buf);

38
drivers/staging/brcm80211/brcmfmac/dhd_linux.c
View File

@ -82,10 +82,6 @@ typedef struct dhd_info {
struct semaphore proto_sem;
wait_queue_head_t ioctl_resp_wait;
spinlock_t sdlock;
/* Thread based operation */
bool threads_only;
struct semaphore sdsem;
/* Thread to issue ioctl for multicast */
struct task_struct *sysioc_tsk;
@ -1489,9 +1485,6 @@ dhd_pub_t *brcmf_attach(struct dhd_bus *bus, uint bus_hdrlen)
/* Initialize other structure content */
init_waitqueue_head(&dhd->ioctl_resp_wait);
/* Initialize the spinlocks */
spin_lock_init(&dhd->sdlock);
/* Link to info module */
dhd->pub.info = dhd;
@ -1515,13 +1508,6 @@ dhd_pub_t *brcmf_attach(struct dhd_bus *bus, uint bus_hdrlen)
strcpy(brcmf_nv_path, wl_cfg80211_get_nvramname());
}
/* Initialize thread based operation and lock */
sema_init(&dhd->sdsem, 1);
if ((brcmf_watchdog_prio >= 0) && (brcmf_dpc_prio >= 0))
dhd->threads_only = true;
else
dhd->threads_only = false;
if (brcmf_sysioc) {
sema_init(&dhd->sysioc_sem, 0);
dhd->sysioc_tsk = kthread_run(_brcmf_sysioc_thread, dhd,
@ -1941,30 +1927,6 @@ void brcmf_os_close_image(void *image)
filp_close((struct file *)image, NULL);
}
void brcmf_os_sdlock(dhd_pub_t *pub)
{
dhd_info_t *dhd;
dhd = (dhd_info_t *) (pub->info);
if (dhd->threads_only)
down(&dhd->sdsem);
else
spin_lock_bh(&dhd->sdlock);
}
void brcmf_os_sdunlock(dhd_pub_t *pub)
{
dhd_info_t *dhd;
dhd = (dhd_info_t *) (pub->info);
if (dhd->threads_only)
up(&dhd->sdsem);
else
spin_unlock_bh(&dhd->sdlock);
}
static int brcmf_host_event(dhd_info_t *dhd, int *ifidx, void *pktdata,
brcmf_event_msg_t *event, void **data)
{

109
drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
View File

@ -597,6 +597,10 @@ typedef struct dhd_bus {
struct tasklet_struct tasklet;
struct task_struct *dpc_tsk;
struct completion dpc_wait;
bool threads_only;
struct semaphore sdsem;
spinlock_t sdlock;
} dhd_bus_t;
typedef volatile struct _sbconfig {
@ -809,13 +813,15 @@ static void brcmf_sdbrcm_chip_resetcore(struct brcmf_sdio *sdh, u32 corebase);
static void brcmf_sdbrcm_sdiod_drive_strength_init(struct dhd_bus *bus,
u32 drivestrength);
static void brcmf_sdbrcm_chip_detach(struct dhd_bus *bus);
static void brcmf_sdbrcm_wait_for_event(dhd_pub_t *dhd, bool *lockvar);
static void brcmf_sdbrcm_wait_for_event(dhd_bus_t *bus, bool *lockvar);
static void brcmf_sdbrcm_wait_event_wakeup(dhd_bus_t *bus);
static void brcmf_sdbrcm_watchdog(unsigned long data);
static int brcmf_sdbrcm_watchdog_thread(void *data);
static int brcmf_sdbrcm_dpc_thread(void *data);
static void brcmf_sdbrcm_dpc_tasklet(unsigned long data);
static void brcmf_sdbrcm_sched_dpc(dhd_bus_t *bus);
static void brcmf_sdbrcm_sdlock(dhd_bus_t *bus);
static void brcmf_sdbrcm_sdunlock(dhd_bus_t *bus);
/* Packet free applicable unconditionally for sdio and sdspi.
* Conditional if bufpool was present for gspi bus.
@ -1295,9 +1301,9 @@ static int brcmf_sdbrcm_txpkt(dhd_bus_t *bus, struct sk_buff *pkt, uint chan,
done:
/* restore pkt buffer pointer before calling tx complete routine */
skb_pull(pkt, SDPCM_HDRLEN + pad);
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
brcmf_txcomplete(bus->dhd, pkt, ret != 0);
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
if (free_pkt)
brcmu_pkt_buf_free_skb(pkt);
@ -1371,7 +1377,7 @@ int brcmf_sdbrcm_bus_txdata(struct dhd_bus *bus, struct sk_buff *pkt)
}
} else {
/* Lock: we're about to use shared data/code (and SDIO) */
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
/* Otherwise, send it now */
BUS_WAKE(bus);
@ -1396,7 +1402,7 @@ int brcmf_sdbrcm_bus_txdata(struct dhd_bus *bus, struct sk_buff *pkt)
brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
}
return ret;
@ -1512,7 +1518,7 @@ brcmf_sdbrcm_bus_txctl(struct dhd_bus *bus, unsigned char *msg, uint msglen)
ASSERT(IS_ALIGNED((unsigned long)frame, 2));
/* Need to lock here to protect txseq and SDIO tx calls */
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
BUS_WAKE(bus);
@ -1540,7 +1546,7 @@ brcmf_sdbrcm_bus_txctl(struct dhd_bus *bus, unsigned char *msg, uint msglen)
bus->ctrl_frame_buf = frame;
bus->ctrl_frame_len = len;
brcmf_sdbrcm_wait_for_event(bus->dhd, &bus->ctrl_frame_stat);
brcmf_sdbrcm_wait_for_event(bus, &bus->ctrl_frame_stat);
if (bus->ctrl_frame_stat == false) {
DHD_INFO(("%s: ctrl_frame_stat == false\n", __func__));
@ -1614,7 +1620,7 @@ brcmf_sdbrcm_bus_txctl(struct dhd_bus *bus, unsigned char *msg, uint msglen)
brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
if (ret)
bus->dhd->tx_ctlerrs++;
@ -1638,11 +1644,11 @@ int brcmf_sdbrcm_bus_rxctl(struct dhd_bus *bus, unsigned char *msg, uint msglen)
/* Wait until control frame is available */
timeleft = brcmf_os_ioctl_resp_wait(bus->dhd, &bus->rxlen, &pending);
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
rxlen = bus->rxlen;
memcpy(msg, bus->rxctl, min(msglen, rxlen));
bus->rxlen = 0;
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
if (rxlen) {
DHD_CTL(("%s: resumed on rxctl frame, got %d expected %d\n",
@ -1650,20 +1656,20 @@ int brcmf_sdbrcm_bus_rxctl(struct dhd_bus *bus, unsigned char *msg, uint msglen)
} else if (timeleft == 0) {
DHD_ERROR(("%s: resumed on timeout\n", __func__));
#ifdef BCMDBG
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
brcmf_sdbrcm_checkdied(bus, NULL, 0);
brcmf_os_sdunlock(bus->dhd);
#endif /* BCMDBG */
brcmf_sdbrcm_sdunlock(bus);
#endif /* DHD_DEBUG */
} else if (pending == true) {
DHD_CTL(("%s: cancelled\n", __func__));
return -ERESTARTSYS;
} else {
DHD_CTL(("%s: resumed for unknown reason?\n", __func__));
#ifdef BCMDBG
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
brcmf_sdbrcm_checkdied(bus, NULL, 0);
brcmf_os_sdunlock(bus->dhd);
#endif /* BCMDBG */
brcmf_sdbrcm_sdunlock(bus);
#endif /* DHD_DEBUG */
}
if (rxlen)
@ -2373,7 +2379,7 @@ brcmf_sdbrcm_doiovar(dhd_bus_t *bus, const struct brcmu_iovar *vi, u32 actionid,
bool_val = (int_val != 0) ? true : false;
/* Some ioctls use the bus */
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
/* Check if dongle is in reset. If so, only allow DEVRESET iovars */
if (bus->dhd->dongle_reset && !(actionid == IOV_SVAL(IOV_DEVRESET) ||
@ -2786,7 +2792,7 @@ exit:
brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
if (actionid == IOV_SVAL(IOV_DEVRESET) && bool_val == false)
brcmf_c_preinit_ioctls((dhd_pub_t *) bus->dhd);
@ -2958,7 +2964,7 @@ brcmf_sdbrcm_bus_iovar_op(dhd_pub_t *dhdp, const char *name,
/* Look up var locally; if not found pass to host driver */
vi = brcmu_iovar_lookup(dhdsdio_iovars, name);
if (vi == NULL) {
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
BUS_WAKE(bus);
@ -2991,7 +2997,7 @@ brcmf_sdbrcm_bus_iovar_op(dhd_pub_t *dhdp, const char *name,
brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
goto exit;
}
@ -3032,7 +3038,7 @@ void brcmf_sdbrcm_bus_stop(struct dhd_bus *bus, bool enforce_mutex)
DHD_TRACE(("%s: Enter\n", __func__));
if (enforce_mutex)
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
BUS_WAKE(bus);
@ -3106,7 +3112,7 @@ void brcmf_sdbrcm_bus_stop(struct dhd_bus *bus, bool enforce_mutex)
bus->tx_seq = bus->rx_seq = 0;
if (enforce_mutex)
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
#if defined(OOB_INTR_ONLY)
brcmf_sdio_unregister_oob_intr();
@ -3133,7 +3139,7 @@ int brcmf_sdbrcm_bus_init(dhd_pub_t *dhdp, bool enforce_mutex)
brcmf_sdbrcm_wd_timer(bus, brcmf_watchdog_ms);
if (enforce_mutex)
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
/* Make sure backplane clock is on, needed to generate F2 interrupt */
brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
@ -3233,7 +3239,7 @@ int brcmf_sdbrcm_bus_init(dhd_pub_t *dhdp, bool enforce_mutex)
exit:
if (enforce_mutex)
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
return ret;
}
@ -3797,9 +3803,9 @@ static u8 brcmf_sdbrcm_rxglom(dhd_bus_t *bus, u8 rxseq)
#endif /* BCMDBG */
}
if (num) {
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
brcmf_rx_frame(bus->dhd, ifidx, save_pfirst, num);
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
}
bus->rxglomframes++;
@ -4383,9 +4389,9 @@ deliver:
}
/* Unlock during rx call */
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
brcmf_rx_frame(bus->dhd, ifidx, pkt, 1);
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
}
rxcount = maxframes - rxleft;
#ifdef BCMDBG
@ -4495,7 +4501,7 @@ static bool brcmf_sdbrcm_dpc(dhd_bus_t *bus)
/* Start with leftover status bits */
intstatus = bus->intstatus;
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
/* If waiting for HTAVAIL, check status */
if (bus->clkstate == CLK_PENDING) {
@ -4725,7 +4731,7 @@ clkwait:
brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
return resched;
}
@ -5054,7 +5060,7 @@ extern bool brcmf_sdbrcm_bus_watchdog(dhd_pub_t *dhdp)
if (bus->sleeping)
return false;
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
/* Poll period: check device if appropriate. */
if (bus->poll && (++bus->polltick >= bus->pollrate)) {
@ -5131,7 +5137,7 @@ extern bool brcmf_sdbrcm_bus_watchdog(dhd_pub_t *dhdp)
}
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
return bus->ipend;
}
@ -5150,11 +5156,11 @@ static int brcmf_sdbrcm_bus_console_in(dhd_pub_t *dhdp, unsigned char *msg,
return -ENOTSUPP;
/* Exclusive bus access */
brcmf_os_sdlock(bus->dhd);
brcmf_sdbrcm_sdlock(bus);
/* Don't allow input if dongle is in reset */
if (bus->dhd->dongle_reset) {
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
return -EPERM;
}
@ -5196,7 +5202,7 @@ done:
brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
}
brcmf_os_sdunlock(bus->dhd);
brcmf_sdbrcm_sdunlock(bus);
return rv;
}
@ -5318,6 +5324,15 @@ static void *brcmf_sdbrcm_probe(u16 venid, u16 devid, u16 bus_no,
bus->timer.data = (unsigned long)bus;
bus->timer.function = brcmf_sdbrcm_watchdog;
/* Initialize thread based operation and lock */
if ((brcmf_watchdog_prio >= 0) && (brcmf_dpc_prio >= 0)) {
bus->threads_only = true;
sema_init(&bus->sdsem, 1);
} else {
bus->threads_only = false;
spin_lock_init(&bus->sdlock);
}
if (brcmf_dpc_prio >= 0) {
/* Initialize watchdog thread */
init_completion(&bus->watchdog_wait);
@ -6470,12 +6485,12 @@ brcmf_sdbrcm_chip_detach(struct dhd_bus *bus)
}
static void
brcmf_sdbrcm_wait_for_event(dhd_pub_t *dhd, bool *lockvar)
brcmf_sdbrcm_wait_for_event(dhd_bus_t *bus, bool *lockvar)
{
brcmf_os_sdunlock(dhd);
wait_event_interruptible_timeout(dhd->bus->ctrl_wait,
brcmf_sdbrcm_sdunlock(bus);
wait_event_interruptible_timeout(bus->ctrl_wait,
(*lockvar == false), HZ * 2);
brcmf_os_sdlock(dhd);
brcmf_sdbrcm_sdlock(bus);
return;
}
@ -6638,3 +6653,19 @@ static void brcmf_sdbrcm_sched_dpc(dhd_bus_t *bus)
tasklet_schedule(&bus->tasklet);
}
static void brcmf_sdbrcm_sdlock(dhd_bus_t *bus)
{
if (bus->threads_only)
down(&bus->sdsem);
else
spin_lock_bh(&bus->sdlock);
}
static void brcmf_sdbrcm_sdunlock(dhd_bus_t *bus)
{
if (bus->threads_only)
up(&bus->sdsem);
else
spin_unlock_bh(&bus->sdlock);
}