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>

1 files changed, 26 insertions, 2 deletions

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 79c6e0517bad..6a7b81388351 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -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);