net/bnxt: fix FW readiness check during recovery

Moved fw readiness check to a new routine bnxt_check_fw_ready().

During error recovery, driver needs to wait for fw readiness.
For that, it uses bnxt_hwrm_ver_get() function now and that
function does parsing of the VER_GET response as well.

Added a new lightweight function bnxt_hwrm_poll_ver_get() for polling
the firmware readiness which issues VER_GET and checks for success
without processing the command response.

Fixes: df6cd7c ("net/bnxt: handle reset notify async event from FW")
Cc: stable@dpdk.org

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>

drivers/net/bnxt/bnxt_ethdev.c

@@ -3859,10 +3859,28 @@ static int bnxt_restore_filters(struct bnxt *bp)
 	return ret;
 }
 
+static int bnxt_check_fw_ready(struct bnxt *bp)
+{
+	int timeout = bp->fw_reset_max_msecs;
+	int rc = 0;
+
+	do {
+		rc = bnxt_hwrm_poll_ver_get(bp);
+		if (rc == 0)
+			break;
+		rte_delay_ms(BNXT_FW_READY_WAIT_INTERVAL);
+		timeout -= BNXT_FW_READY_WAIT_INTERVAL;
+	} while (rc && timeout > 0);
+
+	if (rc)
+		PMD_DRV_LOG(ERR, "FW is not Ready after reset\n");
+
+	return rc;
+}
+
 static void bnxt_dev_recover(void *arg)
 {
 	struct bnxt *bp = arg;
-	int timeout = bp->fw_reset_max_msecs;
 	int rc = 0;
 
 	pthread_mutex_lock(&bp->err_recovery_lock);
@@ -3876,18 +3894,9 @@ static void bnxt_dev_recover(void *arg)
 	/* Clear Error flag so that device re-init should happen */
 	bp->flags &= ~BNXT_FLAG_FATAL_ERROR;
 
-	do {
-		rc = bnxt_hwrm_ver_get(bp, SHORT_HWRM_CMD_TIMEOUT);
-		if (rc == 0)
-			break;
-		rte_delay_ms(BNXT_FW_READY_WAIT_INTERVAL);
-		timeout -= BNXT_FW_READY_WAIT_INTERVAL;
-	} while (rc && timeout);
-
-	if (rc) {
-		PMD_DRV_LOG(ERR, "FW is not Ready after reset\n");
+	rc = bnxt_check_fw_ready(bp);
+	if (rc)
 		goto err;
-	}
 
 	rc = bnxt_init_resources(bp, true);
 	if (rc) {

drivers/net/bnxt/bnxt_hwrm.c

@@ -5913,3 +5913,25 @@ int bnxt_hwrm_fw_echo_reply(struct bnxt *bp, uint32_t echo_req_data1,
 
 	return rc;
 }
+
+int bnxt_hwrm_poll_ver_get(struct bnxt *bp)
+{
+	struct hwrm_ver_get_input req = {.req_type = 0 };
+	struct hwrm_ver_get_output *resp = bp->hwrm_cmd_resp_addr;
+	int rc = 0;
+
+	bp->max_req_len = HWRM_MAX_REQ_LEN;
+	bp->hwrm_cmd_timeout = SHORT_HWRM_CMD_TIMEOUT;
+
+	HWRM_PREP(&req, HWRM_VER_GET, BNXT_USE_CHIMP_MB);
+	req.hwrm_intf_maj = HWRM_VERSION_MAJOR;
+	req.hwrm_intf_min = HWRM_VERSION_MINOR;
+	req.hwrm_intf_upd = HWRM_VERSION_UPDATE;
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
+
+	HWRM_CHECK_RESULT_SILENT();
+	HWRM_UNLOCK();
+
+	return rc;
+}

drivers/net/bnxt/bnxt_hwrm.h

@@ -304,4 +304,5 @@ int bnxt_hwrm_cfa_pair_free(struct bnxt *bp, struct bnxt_representor *rep);
 int bnxt_hwrm_cfa_adv_flow_mgmt_qcaps(struct bnxt *bp);
 int bnxt_hwrm_fw_echo_reply(struct bnxt *bp, uint32_t echo_req_data1,
 			    uint32_t echo_req_data2);
+int bnxt_hwrm_poll_ver_get(struct bnxt *bp);
 #endif