From: Michael Buesch <mb@bu3sch.de>
To: "John W. Linville" <linville@tuxdriver.com>
Cc: netdev@vger.kernel.org, bcm43xx-dev@lists.berlios.de,
Jason Lunz <lunz@falooley.org>,
"Jory A. Pratt" <anarchy@gentoo.org>
Subject: [PATCH 1/2] bcm43xx: redesign locking
Date: Mon, 5 Jun 2006 20:24:10 +0200 [thread overview]
Message-ID: <200606052024.11746.mb@bu3sch.de> (raw)
John, please queue for 2.6.18.
--
Redesign the bcm43xx locking.
This is pre-work to get a preemptible periodic work handler.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx.h
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx.h 2006-06-03 21:04:17.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx.h 2006-06-05 18:19:59.000000000 +0200
@@ -636,6 +636,17 @@
u8 algorithm;
};
+/* Driver initialization status. */
+enum {
+ BCM43xx_STAT_UNINIT, /* Uninitialized. */
+ BCM43xx_STAT_INITIALIZING, /* init_board() in progress. */
+ BCM43xx_STAT_INITIALIZED, /* Fully operational. */
+ BCM43xx_STAT_SHUTTINGDOWN, /* free_board() in progress. */
+ BCM43xx_STAT_RESTARTING, /* controller_restart() called. */
+};
+#define bcm43xx_status(bcm) atomic_read(&(bcm)->init_status)
+#define bcm43xx_set_status(bcm, stat) atomic_set(&(bcm)->init_status, (stat))
+
struct bcm43xx_private {
struct ieee80211_device *ieee;
struct ieee80211softmac_device *softmac;
@@ -647,18 +658,17 @@
void __iomem *mmio_addr;
unsigned int mmio_len;
- /* Do not use the lock directly. Use the bcm43xx_lock* helper
- * functions, to be MMIO-safe. */
- spinlock_t _lock;
-
- /* Driver status flags. */
- u32 initialized:1, /* init_board() succeed */
- was_initialized:1, /* for PCI suspend/resume. */
- shutting_down:1, /* free_board() in progress */
+ /* Locking, see "theory of locking" text below. */
+ spinlock_t irq_lock;
+ struct mutex mutex;
+
+ /* Driver initialization status BCM43xx_STAT_*** */
+ atomic_t init_status;
+
+ u16 was_initialized:1, /* for PCI suspend/resume. */
__using_pio:1, /* Internal, use bcm43xx_using_pio(). */
bad_frames_preempt:1, /* Use "Bad Frames Preemption" (default off) */
reg124_set_0x4:1, /* Some variable to keep track of IRQ stuff. */
- powersaving:1, /* TRUE if we are in PowerSaving mode. FALSE otherwise. */
short_preamble:1, /* TRUE, if short preamble is enabled. */
firmware_norelease:1; /* Do not release the firmware. Used on suspend. */
@@ -722,7 +732,7 @@
struct tasklet_struct isr_tasklet;
/* Periodic tasks */
- struct timer_list periodic_tasks;
+ struct work_struct periodic_work;
unsigned int periodic_state;
struct work_struct restart_work;
@@ -747,21 +757,55 @@
#endif
};
-/* bcm43xx_(un)lock() protect struct bcm43xx_private.
- * Note that _NO_ MMIO writes are allowed. If you want to
- * write to the device through MMIO in the critical section, use
- * the *_mmio lock functions.
- * MMIO read-access is allowed, though.
- */
-#define bcm43xx_lock(bcm, flags) spin_lock_irqsave(&(bcm)->_lock, flags)
-#define bcm43xx_unlock(bcm, flags) spin_unlock_irqrestore(&(bcm)->_lock, flags)
-/* bcm43xx_(un)lock_mmio() protect struct bcm43xx_private and MMIO.
- * MMIO write-access to the device is allowed.
- * All MMIO writes are flushed on unlock, so it is guaranteed to not
- * interfere with other threads writing MMIO registers.
+
+/* *** THEORY OF LOCKING ***
+ *
+ * We have two different locks in the bcm43xx driver.
+ * => bcm->mutex: General sleeping mutex. Protects struct bcm43xx_private
+ * and the device registers.
+ * => bcm->irq_lock: IRQ spinlock. Protects against IRQ handler concurrency.
+ *
+ * We have three types of helper function pairs to utilize these locks.
+ * (Always use the helper functions.)
+ * 1) bcm43xx_{un}lock_noirq():
+ * Takes bcm->mutex. Does _not_ protect against IRQ concurrency,
+ * so it is almost always unsafe, if device IRQs are enabled.
+ * So only use this, if device IRQs are masked.
+ * Locking may sleep.
+ * You can sleep within the critical section.
+ * 2) bcm43xx_{un}lock_irqonly():
+ * Takes bcm->irq_lock. Does _not_ protect against
+ * bcm43xx_lock_noirq() critical sections.
+ * Does only protect against the IRQ handler path and other
+ * irqonly() critical sections.
+ * Locking does not sleep.
+ * You must not sleep within the critical section.
+ * 3) bcm43xx_{un}lock_irqsafe():
+ * This is the cummulative lock and takes both, mutex and irq_lock.
+ * Protects against noirq() and irqonly() critical sections (and
+ * the IRQ handler path).
+ * Locking may sleep.
+ * You must not sleep within the critical section.
*/
-#define bcm43xx_lock_mmio(bcm, flags) bcm43xx_lock(bcm, flags)
-#define bcm43xx_unlock_mmio(bcm, flags) do { mmiowb(); bcm43xx_unlock(bcm, flags); } while (0)
+
+/* Lock type 1 */
+#define bcm43xx_lock_noirq(bcm) mutex_lock(&(bcm)->mutex)
+#define bcm43xx_unlock_noirq(bcm) mutex_unlock(&(bcm)->mutex)
+/* Lock type 2 */
+#define bcm43xx_lock_irqonly(bcm, flags) \
+ spin_lock_irqsave(&(bcm)->irq_lock, flags)
+#define bcm43xx_unlock_irqonly(bcm, flags) \
+ spin_unlock_irqrestore(&(bcm)->irq_lock, flags)
+/* Lock type 3 */
+#define bcm43xx_lock_irqsafe(bcm, flags) do { \
+ bcm43xx_lock_noirq(bcm); \
+ bcm43xx_lock_irqonly(bcm, flags); \
+ } while (0)
+#define bcm43xx_unlock_irqsafe(bcm, flags) do { \
+ bcm43xx_unlock_irqonly(bcm, flags); \
+ bcm43xx_unlock_noirq(bcm); \
+ } while (0)
+
static inline
struct bcm43xx_private * bcm43xx_priv(struct net_device *dev)
@@ -844,16 +888,6 @@
return &(bcm->core_80211_ext[bcm->current_80211_core_idx].radio);
}
-/* Are we running in init_board() context? */
-static inline
-int bcm43xx_is_initializing(struct bcm43xx_private *bcm)
-{
- if (bcm->initialized)
- return 0;
- if (bcm->shutting_down)
- return 0;
- return 1;
-}
static inline
struct bcm43xx_lopair * bcm43xx_get_lopair(struct bcm43xx_phyinfo *phy,
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c 2006-04-28 16:13:40.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c 2006-06-05 18:31:30.000000000 +0200
@@ -77,8 +77,8 @@
down(&big_buffer_sem);
- bcm43xx_lock_mmio(bcm, flags);
- if (!bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
fappend("Board not initialized.\n");
goto out;
}
@@ -121,7 +121,7 @@
fappend("\n");
out:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
up(&big_buffer_sem);
return res;
@@ -159,8 +159,8 @@
unsigned long flags;
down(&big_buffer_sem);
- bcm43xx_lock_mmio(bcm, flags);
- if (!bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
fappend("Board not initialized.\n");
goto out;
}
@@ -169,7 +169,7 @@
fappend("boardflags: 0x%04x\n", bcm->sprom.boardflags);
out:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
up(&big_buffer_sem);
return res;
@@ -188,8 +188,8 @@
u64 tsf;
down(&big_buffer_sem);
- bcm43xx_lock_mmio(bcm, flags);
- if (!bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
fappend("Board not initialized.\n");
goto out;
}
@@ -199,7 +199,7 @@
(unsigned int)(tsf & 0xFFFFFFFFULL));
out:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
up(&big_buffer_sem);
return res;
@@ -221,8 +221,8 @@
res = -EFAULT;
goto out_up;
}
- bcm43xx_lock_mmio(bcm, flags);
- if (!bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
res = -EFAULT;
goto out_unlock;
@@ -233,10 +233,11 @@
goto out_unlock;
}
bcm43xx_tsf_write(bcm, tsf);
+ mmiowb();
res = buf_size;
out_unlock:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
out_up:
up(&big_buffer_sem);
return res;
@@ -257,7 +258,7 @@
int i, cnt, j = 0;
down(&big_buffer_sem);
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
fappend("Last %d logged xmitstatus blobs (Latest first):\n\n",
BCM43xx_NR_LOGGED_XMITSTATUS);
@@ -293,14 +294,14 @@
i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
}
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
if (*ppos == pos) {
/* Done. Drop the copied data. */
e->xmitstatus_printing = 0;
}
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
up(&big_buffer_sem);
return res;
}
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_leds.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_leds.c 2006-04-11 06:00:00.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_leds.c 2006-06-03 21:15:23.000000000 +0200
@@ -51,12 +51,12 @@
struct bcm43xx_private *bcm = led->bcm;
unsigned long flags;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqonly(bcm, flags);
if (led->blink_interval) {
bcm43xx_led_changestate(led);
mod_timer(&led->blink_timer, jiffies + led->blink_interval);
}
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqonly(bcm, flags);
}
static void bcm43xx_led_blink_start(struct bcm43xx_led *led,
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_main.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_main.c 2006-06-03 21:04:17.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_main.c 2006-06-05 20:17:31.000000000 +0200
@@ -502,14 +502,14 @@
u32 old;
unsigned long flags;
- bcm43xx_lock_mmio(bcm, flags);
- if (bcm43xx_is_initializing(bcm) || bcm->shutting_down) {
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_lock_irqonly(bcm, flags);
+ if (unlikely(bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)) {
+ bcm43xx_unlock_irqonly(bcm, flags);
return -EBUSY;
}
old = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
tasklet_disable(&bcm->isr_tasklet);
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqonly(bcm, flags);
if (oldstate)
*oldstate = old;
@@ -1387,7 +1387,7 @@
bcm43xx_dmacontroller_rx_reset(bcm, BCM43xx_MMIO_DMA4_BASE);
#endif
}
- if (bcm->shutting_down) {
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_SHUTTINGDOWN) {
bcm43xx_write32(bcm, BCM43xx_MMIO_STATUS_BITFIELD,
bcm43xx_read32(bcm, BCM43xx_MMIO_STATUS_BITFIELD)
& ~(BCM43xx_SBF_MAC_ENABLED | 0x00000002));
@@ -1707,7 +1707,7 @@
# define bcmirq_handled(irq) do { /* nothing */ } while (0)
#endif /* CONFIG_BCM43XX_DEBUG*/
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqonly(bcm, flags);
reason = bcm->irq_reason;
dma_reason[0] = bcm->dma_reason[0];
dma_reason[1] = bcm->dma_reason[1];
@@ -1732,7 +1732,8 @@
dma_reason[0], dma_reason[1],
dma_reason[2], dma_reason[3]);
bcm43xx_controller_restart(bcm, "DMA error");
- bcm43xx_unlock_mmio(bcm, flags);
+ mmiowb();
+ bcm43xx_unlock_irqonly(bcm, flags);
return;
}
if (unlikely((dma_reason[0] & BCM43xx_DMAIRQ_NONFATALMASK) |
@@ -1819,7 +1820,8 @@
if (!modparam_noleds)
bcm43xx_leds_update(bcm, activity);
bcm43xx_interrupt_enable(bcm, bcm->irq_savedstate);
- bcm43xx_unlock_mmio(bcm, flags);
+ mmiowb();
+ bcm43xx_unlock_irqonly(bcm, flags);
}
static void pio_irq_workaround(struct bcm43xx_private *bcm,
@@ -1868,7 +1870,7 @@
if (!bcm)
return IRQ_NONE;
- spin_lock(&bcm->_lock);
+ spin_lock(&bcm->irq_lock);
reason = bcm43xx_read32(bcm, BCM43xx_MMIO_GEN_IRQ_REASON);
if (reason == 0xffffffff) {
@@ -1897,7 +1899,7 @@
* completely, but some careful work is needed to fix this. I think it
* is best to stay with this cheap workaround for now... .
*/
- if (likely(bcm->initialized)) {
+ if (likely(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)) {
/* disable all IRQs. They are enabled again in the bottom half. */
bcm->irq_savedstate = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
/* save the reason code and call our bottom half. */
@@ -1907,7 +1909,7 @@
out:
mmiowb();
- spin_unlock(&bcm->_lock);
+ spin_unlock(&bcm->irq_lock);
return ret;
}
@@ -3104,15 +3106,14 @@
//TODO for APHY (temperature?)
}
-static void bcm43xx_periodic_task_handler(unsigned long d)
+static void bcm43xx_periodic_work_handler(void *d)
{
- struct bcm43xx_private *bcm = (struct bcm43xx_private *)d;
+ struct bcm43xx_private *bcm = d;
unsigned long flags;
unsigned int state;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
- assert(bcm->initialized);
state = bcm->periodic_state;
if (state % 8 == 0)
bcm43xx_periodic_every120sec(bcm);
@@ -3123,26 +3124,24 @@
bcm43xx_periodic_every15sec(bcm);
bcm->periodic_state = state + 1;
- mod_timer(&bcm->periodic_tasks, jiffies + (HZ * 15));
+ schedule_delayed_work(&bcm->periodic_work, HZ * 15);
- bcm43xx_unlock_mmio(bcm, flags);
+ mmiowb();
+ bcm43xx_unlock_irqsafe(bcm, flags);
}
static void bcm43xx_periodic_tasks_delete(struct bcm43xx_private *bcm)
{
- del_timer_sync(&bcm->periodic_tasks);
+ cancel_rearming_delayed_work(&bcm->periodic_work);
}
static void bcm43xx_periodic_tasks_setup(struct bcm43xx_private *bcm)
{
- struct timer_list *timer = &(bcm->periodic_tasks);
+ struct work_struct *work = &(bcm->periodic_work);
- assert(bcm->initialized);
- setup_timer(timer,
- bcm43xx_periodic_task_handler,
- (unsigned long)bcm);
- timer->expires = jiffies;
- add_timer(timer);
+ assert(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
+ INIT_WORK(work, bcm43xx_periodic_work_handler, bcm);
+ schedule_work(work);
}
static void bcm43xx_security_init(struct bcm43xx_private *bcm)
@@ -3156,16 +3155,12 @@
static void bcm43xx_free_board(struct bcm43xx_private *bcm)
{
int i, err;
- unsigned long flags;
+ bcm43xx_lock_noirq(bcm);
bcm43xx_sysfs_unregister(bcm);
-
bcm43xx_periodic_tasks_delete(bcm);
- bcm43xx_lock(bcm, flags);
- bcm->initialized = 0;
- bcm->shutting_down = 1;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_set_status(bcm, BCM43xx_STAT_SHUTTINGDOWN);
for (i = 0; i < BCM43xx_MAX_80211_CORES; i++) {
if (!bcm->core_80211[i].available)
@@ -3180,23 +3175,19 @@
bcm43xx_pctl_set_crystal(bcm, 0);
- bcm43xx_lock(bcm, flags);
- bcm->shutting_down = 0;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_set_status(bcm, BCM43xx_STAT_UNINIT);
+ bcm43xx_unlock_noirq(bcm);
}
static int bcm43xx_init_board(struct bcm43xx_private *bcm)
{
int i, err;
int connect_phy;
- unsigned long flags;
might_sleep();
- bcm43xx_lock(bcm, flags);
- bcm->initialized = 0;
- bcm->shutting_down = 0;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_lock_noirq(bcm);
+ bcm43xx_set_status(bcm, BCM43xx_STAT_INITIALIZING);
err = bcm43xx_pctl_set_crystal(bcm, 1);
if (err)
@@ -3263,9 +3254,7 @@
}
/* Initialization of the board is done. Flag it as such. */
- bcm43xx_lock(bcm, flags);
- bcm->initialized = 1;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_set_status(bcm, BCM43xx_STAT_INITIALIZED);
bcm43xx_periodic_tasks_setup(bcm);
bcm43xx_sysfs_register(bcm);
@@ -3273,6 +3262,8 @@
assert(err == 0);
out:
+ bcm43xx_unlock_noirq(bcm);
+
return err;
err_80211_unwind:
@@ -3544,8 +3535,8 @@
struct bcm43xx_radioinfo *radio;
unsigned long flags;
- bcm43xx_lock_mmio(bcm, flags);
- if (bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
bcm43xx_mac_suspend(bcm);
bcm43xx_radio_selectchannel(bcm, channel, 0);
bcm43xx_mac_enable(bcm);
@@ -3553,7 +3544,7 @@
radio = bcm43xx_current_radio(bcm);
radio->initial_channel = channel;
}
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
}
/* set_security() callback in struct ieee80211_device */
@@ -3567,7 +3558,7 @@
dprintk(KERN_INFO PFX "set security called\n");
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
if (sec->flags & (1<<keyidx)) {
@@ -3596,7 +3587,8 @@
secinfo->encrypt = sec->encrypt;
dprintk(KERN_INFO PFX " .encrypt = %d\n", sec->encrypt);
}
- if (bcm->initialized && !bcm->ieee->host_encrypt) {
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED &&
+ !bcm->ieee->host_encrypt) {
if (secinfo->enabled) {
/* upload WEP keys to hardware */
char null_address[6] = { 0 };
@@ -3630,7 +3622,7 @@
} else
bcm43xx_clear_keys(bcm);
}
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
}
/* hard_start_xmit() callback in struct ieee80211_device */
@@ -3642,10 +3634,10 @@
int err = -ENODEV;
unsigned long flags;
- bcm43xx_lock_mmio(bcm, flags);
- if (likely(bcm->initialized))
+ bcm43xx_lock_irqonly(bcm, flags);
+ if (likely(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED))
err = bcm43xx_tx(bcm, txb);
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqonly(bcm, flags);
return err;
}
@@ -3660,9 +3652,9 @@
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqonly(bcm, flags);
bcm43xx_controller_restart(bcm, "TX timeout");
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqonly(bcm, flags);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
@@ -3701,6 +3693,7 @@
{
int err;
+ bcm43xx_set_status(bcm, BCM43xx_STAT_UNINIT);
bcm->ieee = netdev_priv(net_dev);
bcm->softmac = ieee80211_priv(net_dev);
bcm->softmac->set_channel = bcm43xx_ieee80211_set_chan;
@@ -3709,7 +3702,8 @@
bcm->pci_dev = pci_dev;
bcm->net_dev = net_dev;
bcm->bad_frames_preempt = modparam_bad_frames_preempt;
- spin_lock_init(&bcm->_lock);
+ spin_lock_init(&bcm->irq_lock);
+ mutex_init(&bcm->mutex);
tasklet_init(&bcm->isr_tasklet,
(void (*)(unsigned long))bcm43xx_interrupt_tasklet,
(unsigned long)bcm);
@@ -3840,7 +3834,7 @@
struct net_device *net_dev = bcm->net_dev;
struct pci_dev *pci_dev = bcm->pci_dev;
int err;
- int was_initialized = bcm->initialized;
+ int was_initialized = (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
netif_stop_queue(bcm->net_dev);
tasklet_disable(&bcm->isr_tasklet);
@@ -3875,6 +3869,7 @@
*/
void bcm43xx_controller_restart(struct bcm43xx_private *bcm, const char *reason)
{
+ bcm43xx_set_status(bcm, BCM43xx_STAT_RESTARTING);
bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
bcm43xx_read32(bcm, BCM43xx_MMIO_STATUS_BITFIELD); /* dummy read */
printk(KERN_ERR PFX "Controller RESET (%s) ...\n", reason);
@@ -3893,11 +3888,11 @@
dprintk(KERN_INFO PFX "Suspending...\n");
- bcm43xx_lock(bcm, flags);
- bcm->was_initialized = bcm->initialized;
- if (bcm->initialized)
+ bcm43xx_lock_irqsafe(bcm, flags);
+ bcm->was_initialized = (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
+ if (bcm->was_initialized)
try_to_shutdown = 1;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
netif_device_detach(net_dev);
if (try_to_shutdown) {
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_pio.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_pio.c 2006-04-28 16:13:40.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_pio.c 2006-06-05 20:17:31.000000000 +0200
@@ -262,7 +262,7 @@
int err;
u16 txctl;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqonly(bcm, flags);
txctl = bcm43xx_pio_read(queue, BCM43xx_PIO_TXCTL);
if (txctl & BCM43xx_PIO_TXCTL_SUSPEND)
@@ -298,7 +298,7 @@
continue;
}
out_unlock:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqonly(bcm, flags);
}
static void setup_txqueues(struct bcm43xx_pioqueue *queue)
@@ -374,7 +374,6 @@
struct bcm43xx_pio_txpacket *packet, *tmp_packet;
netif_tx_disable(queue->bcm->net_dev);
- assert(queue->bcm->shutting_down);
tasklet_disable(&queue->txtask);
list_for_each_entry_safe(packet, tmp_packet, &queue->txrunning, list)
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c 2006-04-28 16:13:40.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c 2006-06-05 18:29:34.000000000 +0200
@@ -120,12 +120,12 @@
GFP_KERNEL);
if (!sprom)
return -ENOMEM;
- bcm43xx_lock_mmio(bcm, flags);
- assert(bcm->initialized);
+ bcm43xx_lock_irqsafe(bcm, flags);
err = bcm43xx_sprom_read(bcm, sprom);
if (!err)
err = sprom2hex(sprom, buf, PAGE_SIZE);
- bcm43xx_unlock_mmio(bcm, flags);
+ mmiowb();
+ bcm43xx_unlock_irqsafe(bcm, flags);
kfree(sprom);
return err;
@@ -150,10 +150,10 @@
err = hex2sprom(sprom, buf, count);
if (err)
goto out_kfree;
- bcm43xx_lock_mmio(bcm, flags);
- assert(bcm->initialized);
+ bcm43xx_lock_irqsafe(bcm, flags);
err = bcm43xx_sprom_write(bcm, sprom);
- bcm43xx_unlock_mmio(bcm, flags);
+ mmiowb();
+ bcm43xx_unlock_irqsafe(bcm, flags);
out_kfree:
kfree(sprom);
@@ -170,15 +170,13 @@
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
- unsigned long flags;
int err;
ssize_t count = 0;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- bcm43xx_lock(bcm, flags);
- assert(bcm->initialized);
+ bcm43xx_lock_noirq(bcm);
switch (bcm43xx_current_radio(bcm)->interfmode) {
case BCM43xx_RADIO_INTERFMODE_NONE:
@@ -195,7 +193,7 @@
}
err = 0;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_noirq(bcm);
return err ? err : count;
@@ -231,16 +229,15 @@
return -EINVAL;
}
- bcm43xx_lock_mmio(bcm, flags);
- assert(bcm->initialized);
+ bcm43xx_lock_irqsafe(bcm, flags);
err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
if (err) {
printk(KERN_ERR PFX "Interference Mitigation not "
"supported by device\n");
}
-
- bcm43xx_unlock_mmio(bcm, flags);
+ mmiowb();
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err ? err : count;
}
@@ -254,15 +251,13 @@
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
- unsigned long flags;
int err;
ssize_t count;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- bcm43xx_lock(bcm, flags);
- assert(bcm->initialized);
+ bcm43xx_lock_noirq(bcm);
if (bcm->short_preamble)
count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
@@ -270,7 +265,7 @@
count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
err = 0;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_noirq(bcm);
return err ? err : count;
}
@@ -290,13 +285,12 @@
value = get_boolean(buf, count);
if (value < 0)
return value;
- bcm43xx_lock(bcm, flags);
- assert(bcm->initialized);
+ bcm43xx_lock_irqsafe(bcm, flags);
bcm->short_preamble = !!value;
err = 0;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err ? err : count;
}
@@ -310,7 +304,7 @@
struct device *dev = &bcm->pci_dev->dev;
int err;
- assert(bcm->initialized);
+ assert(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
err = device_create_file(dev, &dev_attr_sprom);
if (err)
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_wx.c 2006-05-25 20:54:02.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_wx.c 2006-06-05 18:27:12.000000000 +0200
@@ -55,13 +55,13 @@
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
- unsigned long flags;
int i;
+ unsigned long flags;
struct bcm43xx_phyinfo *phy;
char suffix[7] = { 0 };
int have_a = 0, have_b = 0, have_g = 0;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
for (i = 0; i < bcm->nr_80211_available; i++) {
phy = &(bcm->core_80211_ext[i].phy);
switch (phy->type) {
@@ -77,7 +77,7 @@
assert(0);
}
}
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
i = 0;
if (have_a) {
@@ -111,7 +111,7 @@
int freq;
int err = -EINVAL;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
if ((data->freq.m >= 0) && (data->freq.m <= 1000)) {
channel = data->freq.m;
freq = bcm43xx_channel_to_freq(bcm, channel);
@@ -121,7 +121,7 @@
}
if (!bcm43xx_is_valid_channel(bcm, channel))
goto out_unlock;
- if (bcm->initialized) {
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
//ieee80211softmac_disassoc(softmac, $REASON);
bcm43xx_mac_suspend(bcm);
err = bcm43xx_radio_selectchannel(bcm, channel, 0);
@@ -131,7 +131,7 @@
err = 0;
}
out_unlock:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -147,11 +147,10 @@
int err = -ENODEV;
u16 channel;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
radio = bcm43xx_current_radio(bcm);
channel = radio->channel;
if (channel == 0xFF) {
- assert(!bcm->initialized);
channel = radio->initial_channel;
if (channel == 0xFF)
goto out_unlock;
@@ -163,7 +162,7 @@
err = 0;
out_unlock:
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -181,13 +180,13 @@
if (mode == IW_MODE_AUTO)
mode = BCM43xx_INITIAL_IWMODE;
- bcm43xx_lock_mmio(bcm, flags);
- if (bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
if (bcm->ieee->iw_mode != mode)
bcm43xx_set_iwmode(bcm, mode);
} else
bcm->ieee->iw_mode = mode;
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -200,9 +199,9 @@
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
data->mode = bcm->ieee->iw_mode;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -255,7 +254,7 @@
IW_ENC_CAPA_CIPHER_TKIP |
IW_ENC_CAPA_CIPHER_CCMP;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
phy = bcm43xx_current_phy(bcm);
range->num_bitrates = 0;
@@ -302,7 +301,7 @@
}
range->num_frequency = j;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -313,14 +312,13 @@
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
- unsigned long flags;
size_t len;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_noirq(bcm);
len = min((size_t)data->data.length, (size_t)IW_ESSID_MAX_SIZE);
memcpy(bcm->nick, extra, len);
bcm->nick[len] = '\0';
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_noirq(bcm);
return 0;
}
@@ -331,15 +329,14 @@
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
- unsigned long flags;
size_t len;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_noirq(bcm);
len = strlen(bcm->nick) + 1;
memcpy(extra, bcm->nick, len);
data->data.length = (__u16)len;
data->data.flags = 1;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_noirq(bcm);
return 0;
}
@@ -353,7 +350,7 @@
unsigned long flags;
int err = -EINVAL;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
if (data->rts.disabled) {
bcm->rts_threshold = BCM43xx_MAX_RTS_THRESHOLD;
err = 0;
@@ -364,7 +361,7 @@
err = 0;
}
}
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -377,11 +374,11 @@
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
data->rts.value = bcm->rts_threshold;
data->rts.fixed = 0;
data->rts.disabled = (bcm->rts_threshold == BCM43xx_MAX_RTS_THRESHOLD);
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -395,7 +392,7 @@
unsigned long flags;
int err = -EINVAL;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
if (data->frag.disabled) {
bcm->ieee->fts = MAX_FRAG_THRESHOLD;
err = 0;
@@ -406,7 +403,7 @@
err = 0;
}
}
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -419,11 +416,11 @@
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
data->frag.value = bcm->ieee->fts;
data->frag.fixed = 0;
data->frag.disabled = (bcm->ieee->fts == MAX_FRAG_THRESHOLD);
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -445,8 +442,8 @@
return -EOPNOTSUPP;
}
- bcm43xx_lock_mmio(bcm, flags);
- if (!bcm->initialized)
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
goto out_unlock;
radio = bcm43xx_current_radio(bcm);
phy = bcm43xx_current_phy(bcm);
@@ -469,7 +466,7 @@
err = 0;
out_unlock:
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -484,8 +481,8 @@
unsigned long flags;
int err = -ENODEV;
- bcm43xx_lock(bcm, flags);
- if (!bcm->initialized)
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
goto out_unlock;
radio = bcm43xx_current_radio(bcm);
/* desired dBm value is in Q5.2 */
@@ -496,7 +493,7 @@
err = 0;
out_unlock:
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -583,8 +580,8 @@
return -EINVAL;
}
- bcm43xx_lock_mmio(bcm, flags);
- if (bcm->initialized) {
+ bcm43xx_lock_irqsafe(bcm, flags);
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
if (err) {
printk(KERN_ERR PFX "Interference Mitigation not "
@@ -598,7 +595,7 @@
} else
bcm43xx_current_radio(bcm)->interfmode = mode;
}
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return err;
}
@@ -612,9 +609,9 @@
unsigned long flags;
int mode;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
mode = bcm43xx_current_radio(bcm)->interfmode;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
switch (mode) {
case BCM43xx_RADIO_INTERFMODE_NONE:
@@ -644,9 +641,9 @@
int on;
on = *((int *)extra);
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
bcm->short_preamble = !!on;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -660,9 +657,9 @@
unsigned long flags;
int on;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
on = bcm->short_preamble;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
if (on)
strncpy(extra, "1 (Short Preamble enabled)", MAX_WX_STRING);
@@ -684,11 +681,11 @@
on = *((int *)extra);
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
bcm->ieee->host_encrypt = !!on;
bcm->ieee->host_decrypt = !!on;
bcm->ieee->host_build_iv = !on;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
return 0;
}
@@ -702,9 +699,9 @@
unsigned long flags;
int on;
- bcm43xx_lock(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
on = bcm->ieee->host_encrypt;
- bcm43xx_unlock(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
if (on)
strncpy(extra, "1 (SW encryption enabled) ", MAX_WX_STRING);
@@ -767,11 +764,11 @@
if (!sprom)
goto out;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
err = -ENODEV;
- if (bcm->initialized)
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)
err = bcm43xx_sprom_read(bcm, sprom);
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
if (!err)
data->data.length = sprom2hex(sprom, extra);
kfree(sprom);
@@ -812,11 +809,11 @@
if (err)
goto out_kfree;
- bcm43xx_lock_mmio(bcm, flags);
+ bcm43xx_lock_irqsafe(bcm, flags);
err = -ENODEV;
- if (bcm->initialized)
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)
err = bcm43xx_sprom_write(bcm, sprom);
- bcm43xx_unlock_mmio(bcm, flags);
+ bcm43xx_unlock_irqsafe(bcm, flags);
out_kfree:
kfree(sprom);
out:
Index: wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_phy.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx/bcm43xx_phy.c 2006-06-05 17:47:26.000000000 +0200
+++ wireless-dev/drivers/net/wireless/bcm43xx/bcm43xx_phy.c 2006-06-05 20:17:31.000000000 +0200
@@ -1648,7 +1648,7 @@
void bcm43xx_phy_lo_g_measure(struct bcm43xx_private *bcm)
{
static const u8 pairorder[10] = { 3, 1, 5, 7, 9, 2, 0, 4, 6, 8 };
- const int is_initializing = bcm43xx_is_initializing(bcm);
+ const int is_initializing = (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZING);
struct bcm43xx_phyinfo *phy = bcm43xx_current_phy(bcm);
struct bcm43xx_radioinfo *radio = bcm43xx_current_radio(bcm);
u16 h, i, oldi = 0, j;
--
Greetings Michael.
reply other threads:[~2006-06-05 18:27 UTC|newest]
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