[dpdk-dev] [PATCH v2 04/13] net/bnxt: inform firmware about IF state changes

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>

Use latest firmware API to inform firmware about IF state changes.
Firmware has the option to clean up resources during IF down and
to require the driver to reserve resources again during IF up.

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt.h        |  1 +
 drivers/net/bnxt/bnxt_ethdev.c |  4 ++++
 drivers/net/bnxt/bnxt_hwrm.c   | 35 ++++++++++++++++++++++++++++++++++
 drivers/net/bnxt/bnxt_hwrm.h   |  1 +
 4 files changed, 41 insertions(+)

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 8797b032e..394a2a941 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -370,6 +370,7 @@ struct bnxt {
 #define BNXT_FLAG_STINGRAY	(1 << 14)
 #define BNXT_FLAG_FW_RESET	(1 << 15)
 #define BNXT_FLAG_FATAL_ERROR	(1 << 16)
+#define BNXT_FLAG_FW_CAP_IF_CHANGE	(1 << 17)
 #define BNXT_FLAG_EXT_STATS_SUPPORTED	(1 << 29)
 #define BNXT_FLAG_NEW_RM	(1 << 30)
 #define BNXT_FLAG_INIT_DONE	(1U << 31)
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index e545802ce..385492db5 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -803,6 +803,8 @@ static int bnxt_dev_start_op(struct rte_eth_dev *eth_dev)
 			bp->rx_cp_nr_rings, RTE_ETHDEV_QUEUE_STAT_CNTRS);
 	}
 
+	bnxt_hwrm_if_change(bp, 1);
+
 	rc = bnxt_init_chip(bp);
 	if (rc)
 		goto error;
@@ -829,6 +831,7 @@ static int bnxt_dev_start_op(struct rte_eth_dev *eth_dev)
 	return 0;
 
 error:
+	bnxt_hwrm_if_change(bp, 0);
 	bnxt_shutdown_nic(bp);
 	bnxt_free_tx_mbufs(bp);
 	bnxt_free_rx_mbufs(bp);
@@ -895,6 +898,7 @@ static void bnxt_dev_stop_op(struct rte_eth_dev *eth_dev)
 	bnxt_free_tx_mbufs(bp);
 	bnxt_free_rx_mbufs(bp);
 	bnxt_shutdown_nic(bp);
+	bnxt_hwrm_if_change(bp, 0);
 	bp->dev_stopped = 1;
 }
 
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index b27dbe87e..17c7b5e9e 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -716,6 +716,11 @@ int bnxt_hwrm_func_driver_register(struct bnxt *bp)
 	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
 
 	HWRM_CHECK_RESULT();
+
+	flags = rte_le_to_cpu_32(resp->flags);
+	if (flags & HWRM_FUNC_DRV_RGTR_OUTPUT_FLAGS_IF_CHANGE_SUPPORTED)
+		bp->flags |= BNXT_FLAG_FW_CAP_IF_CHANGE;
+
 	HWRM_UNLOCK();
 
 	bp->flags |= BNXT_FLAG_REGISTERED;
@@ -4649,3 +4654,33 @@ int bnxt_hwrm_set_mac(struct bnxt *bp)
 
 	return rc;
 }
+
+int bnxt_hwrm_if_change(struct bnxt *bp, bool state)
+{
+	struct hwrm_func_drv_if_change_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_func_drv_if_change_input req = {0};
+	int rc;
+
+	if (!(bp->flags & BNXT_FLAG_FW_CAP_IF_CHANGE))
+		return 0;
+
+	/* Do not issue FUNC_DRV_IF_CHANGE during reset recovery.
+	 * If we issue FUNC_DRV_IF_CHANGE with flags down before
+	 * FUNC_DRV_UNRGTR, FW resets before FUNC_DRV_UNRGTR
+	 */
+	if (!state && (bp->flags & BNXT_FLAG_FW_RESET))
+		return 0;
+
+	HWRM_PREP(req, FUNC_DRV_IF_CHANGE, BNXT_USE_CHIMP_MB);
+
+	if (state)
+		req.flags =
+		rte_cpu_to_le_32(HWRM_FUNC_DRV_IF_CHANGE_INPUT_FLAGS_UP);
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
+
+	HWRM_CHECK_RESULT();
+	HWRM_UNLOCK();
+
+	return rc;
+}
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index a03620532..2f57e950b 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -201,4 +201,5 @@ int bnxt_hwrm_tunnel_redirect_query(struct bnxt *bp, uint32_t *type);
 int bnxt_hwrm_tunnel_redirect_info(struct bnxt *bp, uint8_t tun_type,
 				   uint16_t *dst_fid);
 int bnxt_hwrm_set_mac(struct bnxt *bp);
+int bnxt_hwrm_if_change(struct bnxt *bp, bool state);
 #endif
-- 
2.20.1 (Apple Git-117)