qlcnic: Add capability to take FW dump deterministically

In presence of multiple functions, current driver implementation does not
guarantee that the FW dump is taken by the same function that forces it.
Change it by adding a fw reset owner flag that could be changed in the device
reset path and only when a function determines that it needs to reset it.

Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com>
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 27 insertions, 10 deletions

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index 480ef5cb6ef9..194376e584e6 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -895,6 +895,7 @@ struct qlcnic_ipaddr {
 #define QLCNIC_MAC_OVERRIDE_DISABLED	0x400
 #define QLCNIC_PROMISC_DISABLED		0x800
 #define QLCNIC_NEED_FLR			0x1000
+#define QLCNIC_FW_RESET_OWNER		0x2000
 #define QLCNIC_IS_MSI_FAMILY(adapter) \
 	((adapter)->flags & (QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED))
 
diff --git a/drivers/net/qlcnic/qlcnic_ctx.c b/drivers/net/qlcnic/qlcnic_ctx.c
index c77024f90078..be2dee155bd8 100644
--- a/drivers/net/qlcnic/qlcnic_ctx.c
+++ b/drivers/net/qlcnic/qlcnic_ctx.c
@@ -95,8 +95,8 @@ int qlcnic_fw_cmd_get_minidump_temp(struct qlcnic_adapter *adapter)
 			QLCNIC_CDRP_CMD_TEMP_SIZE);
 	if (err != QLCNIC_RCODE_SUCCESS) {
 		err = QLCRD32(adapter, QLCNIC_ARG1_CRB_OFFSET);
-		dev_err(&adapter->pdev->dev,
-			"Failed to get template size %d\n", err);
+		dev_info(&adapter->pdev->dev,
+			"Can't get template size %d\n", err);
 		err = -EIO;
 		return err;
 	}
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 347a4a8d1267..0ddbb80eefc7 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -1590,10 +1590,6 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* This will be reset for mezz cards  */
 	adapter->portnum = adapter->ahw->pci_func;
 
-	/* Get FW dump template and store it */
-	if (adapter->op_mode != QLCNIC_NON_PRIV_FUNC)
-		qlcnic_fw_cmd_get_minidump_temp(adapter);
-
 	err = qlcnic_get_board_info(adapter);
 	if (err) {
 		dev_err(&pdev->dev, "Error getting board config info.\n");
@@ -1612,6 +1608,12 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out_decr_ref;
 	}
 
+	/* Get FW dump template and store it */
+	if (adapter->op_mode != QLCNIC_NON_PRIV_FUNC)
+		if (!qlcnic_fw_cmd_get_minidump_temp(adapter))
+			dev_info(&pdev->dev,
+				"Supports FW dump capability\n");
+
 	if (qlcnic_read_mac_addr(adapter))
 		dev_warn(&pdev->dev, "failed to read mac addr\n");
 
@@ -2683,11 +2685,16 @@ err:
 static int
 qlcnic_check_drv_state(struct qlcnic_adapter *adapter)
 {
-	int act, state;
+	int act, state, active_mask;
 
 	state = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
 	act = QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE);
 
+	if (adapter->flags & QLCNIC_FW_RESET_OWNER) {
+		active_mask = (~(1 << (adapter->ahw->pci_func * 4)));
+		act = act & active_mask;
+	}
+
 	if (((state & 0x11111111) == (act & 0x11111111)) ||
 			((act & 0x11111111) == ((state >> 1) & 0x11111111)))
 		return 0;
@@ -2826,6 +2833,11 @@ qlcnic_fwinit_work(struct work_struct *work)
 
 	if (!qlcnic_check_drv_state(adapter)) {
 skip_ack_check:
+		if (!(adapter->flags & QLCNIC_FW_RESET_OWNER)) {
+			qlcnic_api_unlock(adapter);
+			goto wait_npar;
+		}
+
 		dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
 
 		if (dev_state == QLCNIC_DEV_NEED_RESET) {
@@ -2836,6 +2848,7 @@ skip_ack_check:
 			qlcnic_idc_debug_info(adapter, 0);
 			QLCDB(adapter, DRV, "Take FW dump\n");
 			qlcnic_dump_fw(adapter);
+			adapter->flags &= ~QLCNIC_FW_RESET_OWNER;
 		}
 
 		qlcnic_api_unlock(adapter);
@@ -2900,9 +2913,11 @@ qlcnic_detach_work(struct work_struct *work)
 
 	if (adapter->temp == QLCNIC_TEMP_PANIC)
 		goto err_ret;
-
-	if (qlcnic_set_drv_state(adapter, adapter->dev_state))
-		goto err_ret;
+	/* Dont ack if this instance is the reset owner */
+	if (!(adapter->flags & QLCNIC_FW_RESET_OWNER)) {
+		if (qlcnic_set_drv_state(adapter, adapter->dev_state))
+			goto err_ret;
+	}
 
 	adapter->fw_wait_cnt = 0;
 
@@ -2947,6 +2962,7 @@ qlcnic_dev_request_reset(struct qlcnic_adapter *adapter)
 
 	if (state == QLCNIC_DEV_READY) {
 		QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_NEED_RESET);
+		adapter->flags |= QLCNIC_FW_RESET_OWNER;
 		QLCDB(adapter, DRV, "NEED_RESET state set\n");
 		qlcnic_idc_debug_info(adapter, 0);
 	}