qlcnic: support quisce mode
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>
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 79c6e05..6a7b813 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -2043,8 +2043,11 @@
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 @@
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 @@
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 @@
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);