bnxt_en: perform no master recovery during startup

The NS3 SoC platforms require assistance from the OP-TEE to recover
firmware if a crash occurs while no driver is bound. The
CRASHED_NO_MASTER condition is recorded in the firmware status register
during the crash to indicate when driver intervension is needed to
coordinate a firmware reload. This condition is detected during early
driver initialization in order to effect a firmware fastboot on
supported platforms when necessary.
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -11035,6 +11035,21 @@ static void bnxt_init_dflt_coal(struct bnxt *bp)
 	bp->stats_coal_ticks = BNXT_DEF_STATS_COAL_TICKS;
 }
 
+static int bnxt_fw_reset_via_optee(struct bnxt *bp)
+{
+#ifdef CONFIG_TEE_BNXT_FW
+	int rc = tee_bnxt_fw_load();
+
+	if (rc)
+		netdev_err(bp->dev, "Failed FW reset via OP-TEE, rc=%d\n", rc);
+
+	return rc;
+#else
+	netdev_err(bp->dev, "OP-TEE not supported\n");
+	return -ENODEV;
+#endif
+}
+
 static int bnxt_fw_init_one_p1(struct bnxt *bp)
 {
 	int rc;
@@ -11043,11 +11058,20 @@ static int bnxt_fw_init_one_p1(struct bnxt *bp)
 	rc = bnxt_hwrm_ver_get(bp);
 	bnxt_try_map_fw_health_reg(bp);
 	if (rc) {
-		if (bp->fw_health && bp->fw_health->status_reliable)
+		if (bp->fw_health && bp->fw_health->status_reliable) {
+			u32 sts = bnxt_fw_health_readl(bp, BNXT_FW_HEALTH_REG);
+
 			netdev_err(bp->dev,
 				   "Firmware not responding, status: 0x%x\n",
-				   bnxt_fw_health_readl(bp,
-							BNXT_FW_HEALTH_REG));
+				   sts);
+			if (sts & FW_STATUS_REG_CRASHED_NO_MASTER) {
+				netdev_warn(bp->dev, "Firmware recover via OP-TEE requested\n");
+				rc = bnxt_fw_reset_via_optee(bp);
+				if (!rc)
+					rc = bnxt_hwrm_ver_get(bp);
+			}
+		}
+		if (rc)
 			return rc;
 	}
 
@@ -11221,12 +11245,8 @@ static void bnxt_reset_all(struct bnxt *bp)
 	int i, rc;
 
 	if (bp->fw_cap & BNXT_FW_CAP_ERR_RECOVER_RELOAD) {
-#ifdef CONFIG_TEE_BNXT_FW
-		rc = tee_bnxt_fw_load();
-		if (rc)
-			netdev_err(bp->dev, "Unable to reset FW rc=%d\n", rc);
+		bnxt_fw_reset_via_optee(bp);
 		bp->fw_reset_timestamp = jiffies;
-#endif
 		return;
 	}