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qlcnic: support quisce mode

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Device can go to quiescent state, during which drivers
should refrain from using the device.

Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sucheta Chakraborty 2010-05-13 03:07:49 +00:00 committed by David S. Miller
parent b3a2464941
commit a5e463d0b1
1 changed files with 26 additions and 2 deletions
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28
drivers/net/qlcnic/qlcnic_main.c
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@ -2043,8 +2043,11 @@ qlcnic_can_start_firmware(struct qlcnic_adapter *adapter)
do {
msleep(1000);
} while ((QLCRD32(adapter, QLCNIC_CRB_DEV_STATE) != QLCNIC_DEV_READY)
&& --dev_init_timeo);
prev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
if (prev_state == QLCNIC_DEV_QUISCENT)
continue;
} while ((prev_state != QLCNIC_DEV_READY) && --dev_init_timeo);
if (!dev_init_timeo) {
dev_err(&adapter->pdev->dev,
@ -2075,6 +2078,14 @@ qlcnic_fwinit_work(struct work_struct *work)
if (qlcnic_api_lock(adapter))
goto err_ret;
dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
if (dev_state == QLCNIC_DEV_QUISCENT) {
qlcnic_api_unlock(adapter);
qlcnic_schedule_work(adapter, qlcnic_fwinit_work,
FW_POLL_DELAY * 2);
return;
}
if (adapter->fw_wait_cnt++ > adapter->reset_ack_timeo) {
dev_err(&adapter->pdev->dev, "Reset:Failed to get ack %d sec\n",
adapter->reset_ack_timeo);
@ -2084,6 +2095,17 @@ qlcnic_fwinit_work(struct work_struct *work)
if (!qlcnic_check_drv_state(adapter)) {
skip_ack_check:
dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
if (dev_state == QLCNIC_DEV_NEED_QUISCENT) {
QLCWR32(adapter, QLCNIC_CRB_DEV_STATE,
QLCNIC_DEV_QUISCENT);
qlcnic_schedule_work(adapter, qlcnic_fwinit_work,
FW_POLL_DELAY * 2);
QLCDB(adapter, DRV, "Quiscing the driver\n");
qlcnic_api_unlock(adapter);
return;
}
if (dev_state == QLCNIC_DEV_NEED_RESET) {
QLCWR32(adapter, QLCNIC_CRB_DEV_STATE,
QLCNIC_DEV_INITIALIZING);
@ -2106,6 +2128,8 @@ skip_ack_check:
QLCDB(adapter, HW, "Func waiting: Device state=%u\n", dev_state);
switch (dev_state) {
case QLCNIC_DEV_QUISCENT:
case QLCNIC_DEV_NEED_QUISCENT:
case QLCNIC_DEV_NEED_RESET:
qlcnic_schedule_work(adapter,
qlcnic_fwinit_work, FW_POLL_DELAY);