bnxt_en: Enhance retry of the first message to the firmware.

Two enhancements:

1. Read the health status first before sending the first
HWRM_VER_GET message to firmware instead of the other way around.
This guarantees we got the accurate health status before we attempt
to send the message.

2. We currently only retry sending the first HWRM_VER_GET message to
the firmware if the firmware is in the process of booting.  If the
firmware is in error state and is doing core dump for example, the
driver should also retry if the health register has the RECOVERING
flag set.  This flag indicates the firmware will undergo recovery
soon.  Modify the retry logic to retry for this case as well.
Reviewed-by: NEdwin Peer <edwin.peer@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -9530,9 +9530,10 @@ static int bnxt_try_recover_fw(struct bnxt *bp)
 
 		mutex_lock(&bp->hwrm_cmd_lock);
 		do {
-			rc = __bnxt_hwrm_ver_get(bp, true);
 			sts = bnxt_fw_health_readl(bp, BNXT_FW_HEALTH_REG);
-			if (!sts || !BNXT_FW_IS_BOOTING(sts))
+			rc = __bnxt_hwrm_ver_get(bp, true);
+			if (!sts || (!BNXT_FW_IS_BOOTING(sts) &&
+				     !BNXT_FW_IS_RECOVERING(sts)))
 				break;
 			retry++;
 		} while (rc == -EBUSY && retry < BNXT_FW_RETRY);

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1564,6 +1564,7 @@ struct bnxt_fw_reporter_ctx {
 #define BNXT_FW_STATUS_HEALTH_MSK	0xffff
 #define BNXT_FW_STATUS_HEALTHY		0x8000
 #define BNXT_FW_STATUS_SHUTDOWN		0x100000
+#define BNXT_FW_STATUS_RECOVERING	0x400000
 
 #define BNXT_FW_IS_HEALTHY(sts)		(((sts) & BNXT_FW_STATUS_HEALTH_MSK) ==\
 					 BNXT_FW_STATUS_HEALTHY)
@@ -1574,6 +1575,9 @@ struct bnxt_fw_reporter_ctx {
 #define BNXT_FW_IS_ERR(sts)		(((sts) & BNXT_FW_STATUS_HEALTH_MSK) > \
 					 BNXT_FW_STATUS_HEALTHY)
 
+#define BNXT_FW_IS_RECOVERING(sts)	(BNXT_FW_IS_ERR(sts) &&		       \
+					 ((sts) & BNXT_FW_STATUS_RECOVERING))
+
 #define BNXT_FW_RETRY			5
 #define BNXT_FW_IF_RETRY		10