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[TG3]: Refine nvram locking 

Add nvram lock count so that calls to tg3_nvram_lock()/unlock() can
be nested. Add error checking to all callers of tg3_nvram_lock()
where appropriate. To prevent nvram lock failures after halting the
firmware, it is also necessary to release firmware's nvram lock in
tg3_halt_cpu().

Update version to 3.48.

Based on David Miller's initial patch.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2006-01-17 02:40:55 -08:00 committed by David S. Miller
parent f0daaa654a
commit ec41c7dfd5
2 changed files with 55 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/net/tg3.c
View File

@ -69,8 +69,8 @@
#define DRV_MODULE_NAME "tg3"
#define PFX DRV_MODULE_NAME ": "
#define DRV_MODULE_VERSION "3.47"
#define DRV_MODULE_RELDATE "Dec 28, 2005"
#define DRV_MODULE_VERSION "3.48"
#define DRV_MODULE_RELDATE "Jan 16, 2006"
#define TG3_DEF_MAC_MODE 0
#define TG3_DEF_RX_MODE 0
@ -1325,9 +1325,11 @@ static int tg3_set_power_state(struct tg3 *tp, int state)
val &= ~((1 << 16) | (1 << 4) | (1 << 2) | (1 << 1) | 1);
tw32(0x7d00, val);
if (!(tp->tg3_flags & TG3_FLAG_ENABLE_ASF)) {
tg3_nvram_lock(tp);
int err;
err = tg3_nvram_lock(tp);
tg3_halt_cpu(tp, RX_CPU_BASE);
tw32_f(NVRAM_SWARB, SWARB_REQ_CLR0);
if (!err)
tg3_nvram_unlock(tp);
}
}
@ -4193,24 +4195,33 @@ static int tg3_nvram_lock(struct tg3 *tp)
if (tp->tg3_flags & TG3_FLAG_NVRAM) {
int i;
if (tp->nvram_lock_cnt == 0) {
tw32(NVRAM_SWARB, SWARB_REQ_SET1);
for (i = 0; i < 8000; i++) {
if (tr32(NVRAM_SWARB) & SWARB_GNT1)
break;
udelay(20);
}
if (i == 8000)
if (i == 8000) {
tw32(NVRAM_SWARB, SWARB_REQ_CLR1);
return -ENODEV;
}
}
tp->nvram_lock_cnt++;
}
return 0;
}
/* tp->lock is held. */
static void tg3_nvram_unlock(struct tg3 *tp)
{
if (tp->tg3_flags & TG3_FLAG_NVRAM)
if (tp->tg3_flags & TG3_FLAG_NVRAM) {
if (tp->nvram_lock_cnt > 0)
tp->nvram_lock_cnt--;
if (tp->nvram_lock_cnt == 0)
tw32_f(NVRAM_SWARB, SWARB_REQ_CLR1);
}
}
/* tp->lock is held. */
static void tg3_enable_nvram_access(struct tg3 *tp)
@ -4320,8 +4331,13 @@ static int tg3_chip_reset(struct tg3 *tp)
void (*write_op)(struct tg3 *, u32, u32);
int i;
if (!(tp->tg3_flags2 & TG3_FLG2_SUN_570X))
if (!(tp->tg3_flags2 & TG3_FLG2_SUN_570X)) {
tg3_nvram_lock(tp);
/* No matching tg3_nvram_unlock() after this because
* chip reset below will undo the nvram lock.
*/
tp->nvram_lock_cnt = 0;
}
/*
* We must avoid the readl() that normally takes place.
@ -4717,6 +4733,10 @@ static int tg3_halt_cpu(struct tg3 *tp, u32 offset)
(offset == RX_CPU_BASE ? "RX" : "TX"));
return -ENODEV;
}
/* Clear firmware's nvram arbitration. */
if (tp->tg3_flags & TG3_FLAG_NVRAM)
tw32(NVRAM_SWARB, SWARB_REQ_CLR0);
return 0;
}
@ -4736,7 +4756,7 @@ struct fw_info {
static int tg3_load_firmware_cpu(struct tg3 *tp, u32 cpu_base, u32 cpu_scratch_base,
int cpu_scratch_size, struct fw_info *info)
{
int err, i;
int err, lock_err, i;
void (*write_op)(struct tg3 *, u32, u32);
if (cpu_base == TX_CPU_BASE &&
@ -4755,8 +4775,9 @@ static int tg3_load_firmware_cpu(struct tg3 *tp, u32 cpu_base, u32 cpu_scratch_b
/* It is possible that bootcode is still loading at this point.
* Get the nvram lock first before halting the cpu.
*/
tg3_nvram_lock(tp);
lock_err = tg3_nvram_lock(tp);
err = tg3_halt_cpu(tp, cpu_base);
if (!lock_err)
tg3_nvram_unlock(tp);
if (err)
goto out;
@ -8182,7 +8203,7 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest,
data[1] = 1;
}
if (etest->flags & ETH_TEST_FL_OFFLINE) {
int irq_sync = 0;
int err, irq_sync = 0;
if (netif_running(dev)) {
tg3_netif_stop(tp);
@ -8192,10 +8213,11 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest,
tg3_full_lock(tp, irq_sync);
tg3_halt(tp, RESET_KIND_SUSPEND, 1);
tg3_nvram_lock(tp);
err = tg3_nvram_lock(tp);
tg3_halt_cpu(tp, RX_CPU_BASE);
if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS))
tg3_halt_cpu(tp, TX_CPU_BASE);
if (!err)
tg3_nvram_unlock(tp);
if (tg3_test_registers(tp) != 0) {
@ -8588,7 +8610,11 @@ static void __devinit tg3_nvram_init(struct tg3 *tp)
GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5701) {
tp->tg3_flags |= TG3_FLAG_NVRAM;
tg3_nvram_lock(tp);
if (tg3_nvram_lock(tp)) {
printk(KERN_WARNING PFX "%s: Cannot get nvarm lock, "
"tg3_nvram_init failed.\n", tp->dev->name);
return;
}
tg3_enable_nvram_access(tp);
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
@ -8686,7 +8712,9 @@ static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val)
if (offset > NVRAM_ADDR_MSK)
return -EINVAL;
tg3_nvram_lock(tp);
ret = tg3_nvram_lock(tp);
if (ret)
return ret;
tg3_enable_nvram_access(tp);
@ -8785,10 +8813,6 @@ static int tg3_nvram_write_block_unbuffered(struct tg3 *tp, u32 offset, u32 len,
offset = offset + (pagesize - page_off);
/* Nvram lock released by tg3_nvram_read() above,
* so need to get it again.
*/
tg3_nvram_lock(tp);
tg3_enable_nvram_access(tp);
/*
@ -8925,7 +8949,9 @@ static int tg3_nvram_write_block(struct tg3 *tp, u32 offset, u32 len, u8 *buf)
else {
u32 grc_mode;
tg3_nvram_lock(tp);
ret = tg3_nvram_lock(tp);
if (ret)
return ret;
tg3_enable_nvram_access(tp);
if ((tp->tg3_flags2 & TG3_FLG2_5750_PLUS) &&

1
drivers/net/tg3.h
View File

@ -2275,6 +2275,7 @@ struct tg3 {
dma_addr_t stats_mapping;
struct work_struct reset_task;
int nvram_lock_cnt;
u32 nvram_size;
u32 nvram_pagesize;
u32 nvram_jedecnum;