[PATCH net-next 0/8] bnxt_en: Updates.

[PATCH net-next 0/8] bnxt_en: Updates.

[Michael Chan]

This series includes simplification and improvement of NAPI polling
logic in bnxt_poll_p5().  The improvements will prevent starving the
async events from firmware if we are in continuous NAPI polling.
The rest of the patches include cleanups, a better return code for
firmware busy, and to clear devlink port type more properly.

Michael Chan (4):
  bnxt_en: Handle all NQ notifications in bnxt_poll_p5().
  bnxt_en: Simplify __bnxt_poll_cqs_done().
  bnxt_en: Process the NQ under NAPI continuous polling.
  bnxt_en: Clear DCB settings after firmware reset.

Vasundhara Volam (4):
  bnxt_en: Remove unnecessary assignment of return code
  bnxt_en: Modify some bnxt_hwrm_*_free() functions to void.
  bnxt_en: Return -EAGAIN if fw command returns BUSY
  bnxt_en: Call devlink_port_type_clear() in remove()

 drivers/net/ethernet/broadcom/bnxt/bnxt.c         | 101 +++++++++-------------
 drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c     |  19 ++--
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c |   5 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c   |   4 +-
 4 files changed, 49 insertions(+), 80 deletions(-)

-- 
2.5.1

[PATCH net-next 1/8] bnxt_en: Handle all NQ notifications in bnxt_poll_p5().

[Michael Chan]

In bnxt_poll_p5(), the logic polls for up to 2 completion rings (RX and
TX) for work.  In the current code, if we reach budget polling the
first completion ring, we will stop.  If the other completion ring
has work to do, we will handle it when NAPI calls us back.

This is not optimal.  We potentially leave an unproceesed entry in
the NQ.  When we are finally done with NAPI polling and re-enable
interrupt, the remaining entry in the NQ will cause interrupt to
be triggered immediately for no reason.

Modify the code in bnxt_poll_p5() to keep looping until all NQ
entries are handled even if the first completion ring has reached
budget.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index dee13ee..0b1af02 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2438,6 +2438,9 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 		nqcmp = &cpr->nq_desc_ring[CP_RING(cons)][CP_IDX(cons)];
 
 		if (!NQ_CMP_VALID(nqcmp, raw_cons)) {
+			if (cpr->has_more_work)
+				break;
+
 			__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ_ARMALL,
 					     false);
 			cpr->cp_raw_cons = raw_cons;
@@ -2459,13 +2462,11 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 			cpr2 = cpr->cp_ring_arr[idx];
 			work_done += __bnxt_poll_work(bp, cpr2,
 						      budget - work_done);
-			cpr->has_more_work = cpr2->has_more_work;
+			cpr->has_more_work |= cpr2->has_more_work;
 		} else {
 			bnxt_hwrm_handler(bp, (struct tx_cmp *)nqcmp);
 		}
 		raw_cons = NEXT_RAW_CMP(raw_cons);
-		if (cpr->has_more_work)
-			break;
 	}
 	__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ, true);
 	cpr->cp_raw_cons = raw_cons;
-- 
2.5.1

[PATCH net-next 2/8] bnxt_en: Simplify __bnxt_poll_cqs_done().

[Michael Chan]

Simplify the function by removing tha 'all' parameter.  In the current
code, the caller has to specify whether to update/arm both completion
rings with the 'all' parameter.

Instead of this, we can just update/arm all the completion rings
that have been polled.  By setting cpr->had_work_done earlier in
__bnxt_poll_work(), we know which completion ring has been polled
and can just update/arm all the completion rings with
cpr->had_work_done set.

This simplifies the function with one less parameter and works just
as well.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0b1af02..6b4f8d8 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2162,6 +2162,7 @@ static int __bnxt_poll_work(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	struct tx_cmp *txcmp;
 
 	cpr->has_more_work = 0;
+	cpr->had_work_done = 1;
 	while (1) {
 		int rc;
 
@@ -2175,7 +2176,6 @@ static int __bnxt_poll_work(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 		 * reading any further.
 		 */
 		dma_rmb();
-		cpr->had_work_done = 1;
 		if (TX_CMP_TYPE(txcmp) == CMP_TYPE_TX_L2_CMP) {
 			tx_pkts++;
 			/* return full budget so NAPI will complete. */
@@ -2392,7 +2392,7 @@ static int __bnxt_poll_cqs(struct bnxt *bp, struct bnxt_napi *bnapi, int budget)
 }
 
 static void __bnxt_poll_cqs_done(struct bnxt *bp, struct bnxt_napi *bnapi,
-				 u64 dbr_type, bool all)
+				 u64 dbr_type)
 {
 	struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
 	int i;
@@ -2401,7 +2401,7 @@ static void __bnxt_poll_cqs_done(struct bnxt *bp, struct bnxt_napi *bnapi,
 		struct bnxt_cp_ring_info *cpr2 = cpr->cp_ring_arr[i];
 		struct bnxt_db_info *db;
 
-		if (cpr2 && (all || cpr2->had_work_done)) {
+		if (cpr2 && cpr2->had_work_done) {
 			db = &cpr2->cp_db;
 			writeq(db->db_key64 | dbr_type |
 			       RING_CMP(cpr2->cp_raw_cons), db->doorbell);
@@ -2425,10 +2425,10 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 		cpr->has_more_work = 0;
 		work_done = __bnxt_poll_cqs(bp, bnapi, budget);
 		if (cpr->has_more_work) {
-			__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ, false);
+			__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ);
 			return work_done;
 		}
-		__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ_ARMALL, true);
+		__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ_ARMALL);
 		if (napi_complete_done(napi, work_done))
 			BNXT_DB_NQ_ARM_P5(&cpr->cp_db, cpr->cp_raw_cons);
 		return work_done;
@@ -2441,8 +2441,7 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 			if (cpr->has_more_work)
 				break;
 
-			__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ_ARMALL,
-					     false);
+			__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ_ARMALL);
 			cpr->cp_raw_cons = raw_cons;
 			if (napi_complete_done(napi, work_done))
 				BNXT_DB_NQ_ARM_P5(&cpr->cp_db,
@@ -2468,7 +2467,7 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 		}
 		raw_cons = NEXT_RAW_CMP(raw_cons);
 	}
-	__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ, true);
+	__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ);
 	cpr->cp_raw_cons = raw_cons;
 	return work_done;
 }
-- 
2.5.1

[PATCH net-next 3/8] bnxt_en: Process the NQ under NAPI continuous polling.

[Michael Chan]

When we are in continuous NAPI polling mode, the current code in
bnxt_poll_p5() will only process the completion rings and will not
process the NQ until interrupt is re-enabled.  Tis logic works and
will not cause RX or TX starvation, but async events in the NQ may
be delayed for the duration of continuous NAPI polling.  These
async events may be firmware or VF events.

Continue to handle the NQ after we are done polling the completion
rings.  This actually simplies the code in bnxt_poll_p5().

Acknowledge the NQ so these async events will not overflow.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6b4f8d8..634b1bd 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2424,14 +2424,6 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 	if (cpr->has_more_work) {
 		cpr->has_more_work = 0;
 		work_done = __bnxt_poll_cqs(bp, bnapi, budget);
-		if (cpr->has_more_work) {
-			__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ);
-			return work_done;
-		}
-		__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ_ARMALL);
-		if (napi_complete_done(napi, work_done))
-			BNXT_DB_NQ_ARM_P5(&cpr->cp_db, cpr->cp_raw_cons);
-		return work_done;
 	}
 	while (1) {
 		cons = RING_CMP(raw_cons);
@@ -2468,7 +2460,10 @@ static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 		raw_cons = NEXT_RAW_CMP(raw_cons);
 	}
 	__bnxt_poll_cqs_done(bp, bnapi, DBR_TYPE_CQ);
-	cpr->cp_raw_cons = raw_cons;
+	if (raw_cons != cpr->cp_raw_cons) {
+		cpr->cp_raw_cons = raw_cons;
+		BNXT_DB_NQ_P5(&cpr->cp_db, raw_cons);
+	}
 	return work_done;
 }
 
-- 
2.5.1

[PATCH net-next 4/8] bnxt_en: Clear DCB settings after firmware reset.

[Michael Chan]

The driver stores a copy of the DCB settings that have been applied to
the firmware.  After firmware reset, the firmware settings are gone and
will revert back to default.  Clear the driver's copy so that if there
is a DCBNL request to get the settings, the driver will retrieve the
current settings from the firmware.  lldpad keeps the DCB settings in
userspace and will re-apply the settings if it is running.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 634b1bd..500d4c8 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8787,6 +8787,7 @@ static int bnxt_hwrm_if_change(struct bnxt *bp, bool up)
 			bnxt_free_ctx_mem(bp);
 			kfree(bp->ctx);
 			bp->ctx = NULL;
+			bnxt_dcb_free(bp);
 			rc = bnxt_fw_init_one(bp);
 			if (rc) {
 				set_bit(BNXT_STATE_ABORT_ERR, &bp->state);
-- 
2.5.1

[PATCH net-next 5/8] bnxt_en: Remove unnecessary assignment of return code

[Michael Chan]

From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>

As part of converting error code in firmware message to standard
code, checking for firmware return code is removed in most of the
places. Remove the assignment of return code where the function
can directly return.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c         | 37 ++++++++---------------
 drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c     | 19 ++++--------
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c |  5 ++-
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c   |  4 +--
 4 files changed, 21 insertions(+), 44 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 500d4c8..b4a551a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5838,8 +5838,7 @@ bnxt_hwrm_reserve_pf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
 	if (bp->hwrm_spec_code < 0x10601)
 		bp->hw_resc.resv_tx_rings = tx_rings;
 
-	rc = bnxt_hwrm_get_rings(bp);
-	return rc;
+	return bnxt_hwrm_get_rings(bp);
 }
 
 static int
@@ -5860,8 +5859,7 @@ bnxt_hwrm_reserve_vf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
 	if (rc)
 		return rc;
 
-	rc = bnxt_hwrm_get_rings(bp);
-	return rc;
+	return bnxt_hwrm_get_rings(bp);
 }
 
 static int bnxt_hwrm_reserve_rings(struct bnxt *bp, int tx, int rx, int grp,
@@ -6021,7 +6019,6 @@ static int bnxt_hwrm_check_vf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
 {
 	struct hwrm_func_vf_cfg_input req = {0};
 	u32 flags;
-	int rc;
 
 	if (!BNXT_NEW_RM(bp))
 		return 0;
@@ -6038,8 +6035,8 @@ static int bnxt_hwrm_check_vf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
 		flags |= FUNC_VF_CFG_REQ_FLAGS_RING_GRP_ASSETS_TEST;
 
 	req.flags = cpu_to_le32(flags);
-	rc = hwrm_send_message_silent(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message_silent(bp, &req, sizeof(req),
+					HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_check_pf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
@@ -6048,7 +6045,6 @@ static int bnxt_hwrm_check_pf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
 {
 	struct hwrm_func_cfg_input req = {0};
 	u32 flags;
-	int rc;
 
 	__bnxt_hwrm_reserve_pf_rings(bp, &req, tx_rings, rx_rings, ring_grps,
 				     cp_rings, stats, vnics);
@@ -6066,8 +6062,8 @@ static int bnxt_hwrm_check_pf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
 	}
 
 	req.flags = cpu_to_le32(flags);
-	rc = hwrm_send_message_silent(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message_silent(bp, &req, sizeof(req),
+					HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_check_rings(struct bnxt *bp, int tx_rings, int rx_rings,
@@ -6539,8 +6535,8 @@ static int bnxt_hwrm_func_backing_store_cfg(struct bnxt *bp, u32 enables)
 	__le64 *pg_dir;
 	u32 flags = 0;
 	u8 *pg_attr;
-	int i, rc;
 	u32 ena;
+	int i;
 
 	if (!ctx)
 		return 0;
@@ -6627,8 +6623,7 @@ static int bnxt_hwrm_func_backing_store_cfg(struct bnxt *bp, u32 enables)
 		bnxt_hwrm_set_pg_attr(&ctx_pg->ring_mem, pg_attr, pg_dir);
 	}
 	req.flags = cpu_to_le32(flags);
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_alloc_ctx_mem_blk(struct bnxt *bp,
@@ -7332,7 +7327,6 @@ int bnxt_hwrm_fw_set_time(struct bnxt *bp)
 
 static int bnxt_hwrm_port_qstats(struct bnxt *bp)
 {
-	int rc;
 	struct bnxt_pf_info *pf = &bp->pf;
 	struct hwrm_port_qstats_input req = {0};
 
@@ -7343,8 +7337,7 @@ static int bnxt_hwrm_port_qstats(struct bnxt *bp)
 	req.port_id = cpu_to_le16(pf->port_id);
 	req.tx_stat_host_addr = cpu_to_le64(bp->hw_tx_port_stats_map);
 	req.rx_stat_host_addr = cpu_to_le64(bp->hw_rx_port_stats_map);
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_port_qstats_ext(struct bnxt *bp)
@@ -7498,7 +7491,6 @@ static void bnxt_hwrm_resource_free(struct bnxt *bp, bool close_path,
 static int bnxt_hwrm_set_br_mode(struct bnxt *bp, u16 br_mode)
 {
 	struct hwrm_func_cfg_input req = {0};
-	int rc;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 	req.fid = cpu_to_le16(0xffff);
@@ -7509,14 +7501,12 @@ static int bnxt_hwrm_set_br_mode(struct bnxt *bp, u16 br_mode)
 		req.evb_mode = FUNC_CFG_REQ_EVB_MODE_VEPA;
 	else
 		return -EINVAL;
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_set_cache_line_size(struct bnxt *bp, int size)
 {
 	struct hwrm_func_cfg_input req = {0};
-	int rc;
 
 	if (BNXT_VF(bp) || bp->hwrm_spec_code < 0x10803)
 		return 0;
@@ -7528,8 +7518,7 @@ static int bnxt_hwrm_set_cache_line_size(struct bnxt *bp, int size)
 	if (size == 128)
 		req.options = FUNC_CFG_REQ_OPTIONS_CACHE_LINESIZE_SIZE_128;
 
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int __bnxt_setup_vnic(struct bnxt *bp, u16 vnic_id)
@@ -8883,14 +8872,12 @@ int bnxt_hwrm_alloc_wol_fltr(struct bnxt *bp)
 int bnxt_hwrm_free_wol_fltr(struct bnxt *bp)
 {
 	struct hwrm_wol_filter_free_input req = {0};
-	int rc;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_WOL_FILTER_FREE, -1, -1);
 	req.port_id = cpu_to_le16(bp->pf.port_id);
 	req.enables = cpu_to_le32(WOL_FILTER_FREE_REQ_ENABLES_WOL_FILTER_ID);
 	req.wol_filter_id = bp->wol_filter_id;
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static u16 bnxt_hwrm_get_wol_fltrs(struct bnxt *bp, u16 handle)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
index fb6f30d..e50c679 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
@@ -39,8 +39,8 @@ static int bnxt_queue_to_tc(struct bnxt *bp, u8 queue_id)
 static int bnxt_hwrm_queue_pri2cos_cfg(struct bnxt *bp, struct ieee_ets *ets)
 {
 	struct hwrm_queue_pri2cos_cfg_input req = {0};
-	int rc = 0, i;
 	u8 *pri2cos;
+	int i;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PRI2COS_CFG, -1, -1);
 	req.flags = cpu_to_le32(QUEUE_PRI2COS_CFG_REQ_FLAGS_PATH_BIDIR |
@@ -56,8 +56,7 @@ static int bnxt_hwrm_queue_pri2cos_cfg(struct bnxt *bp, struct ieee_ets *ets)
 		qidx = bp->tc_to_qidx[ets->prio_tc[i]];
 		pri2cos[i] = bp->q_info[qidx].queue_id;
 	}
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_queue_pri2cos_qcfg(struct bnxt *bp, struct ieee_ets *ets)
@@ -93,8 +92,8 @@ static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
 {
 	struct hwrm_queue_cos2bw_cfg_input req = {0};
 	struct bnxt_cos2bw_cfg cos2bw;
-	int rc = 0, i;
 	void *data;
+	int i;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_COS2BW_CFG, -1, -1);
 	for (i = 0; i < max_tc; i++) {
@@ -128,8 +127,7 @@ static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
 			req.unused_0 = 0;
 		}
 	}
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_queue_cos2bw_qcfg(struct bnxt *bp, struct ieee_ets *ets)
@@ -236,7 +234,6 @@ static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
 	unsigned int tc_mask = 0, pri_mask = 0;
 	u8 i, pri, lltc_count = 0;
 	bool need_q_remap = false;
-	int rc;
 
 	if (!my_ets)
 		return -EINVAL;
@@ -267,15 +264,11 @@ static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
 	}
 
 	if (need_q_remap)
-		rc = bnxt_queue_remap(bp, tc_mask);
+		bnxt_queue_remap(bp, tc_mask);
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PFCENABLE_CFG, -1, -1);
 	req.flags = cpu_to_le32(pri_mask);
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	if (rc)
-		return rc;
-
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_queue_pfc_qcfg(struct bnxt *bp, struct ieee_pfc *pfc)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 1fa3a12..cc807ba 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -2606,7 +2606,7 @@ static int bnxt_set_phys_id(struct net_device *dev,
 	struct bnxt_led_cfg *led_cfg;
 	u8 led_state;
 	__le16 duration;
-	int i, rc;
+	int i;
 
 	if (!bp->num_leds || BNXT_VF(bp))
 		return -EOPNOTSUPP;
@@ -2632,8 +2632,7 @@ static int bnxt_set_phys_id(struct net_device *dev,
 		led_cfg->led_blink_off = duration;
 		led_cfg->led_group_id = bp->leds[i].led_group_id;
 	}
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 static int bnxt_hwrm_selftest_irq(struct bnxt *bp, u16 cmpl_ring)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index 2aba1e0..6ea3df6d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -138,7 +138,6 @@ static bool bnxt_is_trusted_vf(struct bnxt *bp, struct bnxt_vf_info *vf)
 static int bnxt_hwrm_set_trusted_vf(struct bnxt *bp, struct bnxt_vf_info *vf)
 {
 	struct hwrm_func_cfg_input req = {0};
-	int rc;
 
 	if (!(bp->fw_cap & BNXT_FW_CAP_TRUSTED_VF))
 		return 0;
@@ -149,8 +148,7 @@ static int bnxt_hwrm_set_trusted_vf(struct bnxt *bp, struct bnxt_vf_info *vf)
 		req.flags = cpu_to_le32(FUNC_CFG_REQ_FLAGS_TRUSTED_VF_ENABLE);
 	else
 		req.flags = cpu_to_le32(FUNC_CFG_REQ_FLAGS_TRUSTED_VF_DISABLE);
-	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
-	return rc;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
 int bnxt_set_vf_trust(struct net_device *dev, int vf_id, bool trusted)
-- 
2.5.1

[PATCH net-next 6/8] bnxt_en: Modify some bnxt_hwrm_*_free() functions to void.

[Michael Chan]

From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>

Return code is not needed in some of these functions, as the return
code from firmware message is ignored. Remove the unused rc variable
and also convert functions to void.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index b4a551a..e5da60a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5060,10 +5060,8 @@ int bnxt_hwrm_vnic_cfg(struct bnxt *bp, u16 vnic_id)
 	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
-static int bnxt_hwrm_vnic_free_one(struct bnxt *bp, u16 vnic_id)
+static void bnxt_hwrm_vnic_free_one(struct bnxt *bp, u16 vnic_id)
 {
-	u32 rc = 0;
-
 	if (bp->vnic_info[vnic_id].fw_vnic_id != INVALID_HW_RING_ID) {
 		struct hwrm_vnic_free_input req = {0};
 
@@ -5071,10 +5069,9 @@ static int bnxt_hwrm_vnic_free_one(struct bnxt *bp, u16 vnic_id)
 		req.vnic_id =
 			cpu_to_le32(bp->vnic_info[vnic_id].fw_vnic_id);
 
-		rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+		hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 		bp->vnic_info[vnic_id].fw_vnic_id = INVALID_HW_RING_ID;
 	}
-	return rc;
 }
 
 static void bnxt_hwrm_vnic_free(struct bnxt *bp)
@@ -5191,14 +5188,13 @@ static int bnxt_hwrm_ring_grp_alloc(struct bnxt *bp)
 	return rc;
 }
 
-static int bnxt_hwrm_ring_grp_free(struct bnxt *bp)
+static void bnxt_hwrm_ring_grp_free(struct bnxt *bp)
 {
 	u16 i;
-	u32 rc = 0;
 	struct hwrm_ring_grp_free_input req = {0};
 
 	if (!bp->grp_info || (bp->flags & BNXT_FLAG_CHIP_P5))
-		return 0;
+		return;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_RING_GRP_FREE, -1, -1);
 
@@ -5209,12 +5205,10 @@ static int bnxt_hwrm_ring_grp_free(struct bnxt *bp)
 		req.ring_group_id =
 			cpu_to_le32(bp->grp_info[i].fw_grp_id);
 
-		rc = _hwrm_send_message(bp, &req, sizeof(req),
-					HWRM_CMD_TIMEOUT);
+		_hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 		bp->grp_info[i].fw_grp_id = INVALID_HW_RING_ID;
 	}
 	mutex_unlock(&bp->hwrm_cmd_lock);
-	return rc;
 }
 
 static int hwrm_ring_alloc_send_msg(struct bnxt *bp,
@@ -6302,16 +6296,16 @@ int bnxt_hwrm_set_coal(struct bnxt *bp)
 	return rc;
 }
 
-static int bnxt_hwrm_stat_ctx_free(struct bnxt *bp)
+static void bnxt_hwrm_stat_ctx_free(struct bnxt *bp)
 {
-	int rc = 0, i;
 	struct hwrm_stat_ctx_free_input req = {0};
+	int i;
 
 	if (!bp->bnapi)
-		return 0;
+		return;
 
 	if (BNXT_CHIP_TYPE_NITRO_A0(bp))
-		return 0;
+		return;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_STAT_CTX_FREE, -1, -1);
 
@@ -6323,14 +6317,13 @@ static int bnxt_hwrm_stat_ctx_free(struct bnxt *bp)
 		if (cpr->hw_stats_ctx_id != INVALID_STATS_CTX_ID) {
 			req.stat_ctx_id = cpu_to_le32(cpr->hw_stats_ctx_id);
 
-			rc = _hwrm_send_message(bp, &req, sizeof(req),
-						HWRM_CMD_TIMEOUT);
+			_hwrm_send_message(bp, &req, sizeof(req),
+					   HWRM_CMD_TIMEOUT);
 
 			cpr->hw_stats_ctx_id = INVALID_STATS_CTX_ID;
 		}
 	}
 	mutex_unlock(&bp->hwrm_cmd_lock);
-	return rc;
 }
 
 static int bnxt_hwrm_stat_ctx_alloc(struct bnxt *bp)
-- 
2.5.1

[PATCH net-next 7/8] bnxt_en: Return -EAGAIN if fw command returns BUSY

[Michael Chan]

From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>

If firmware command returns error code as HWRM_ERR_CODE_BUSY, which
means it cannot handle the command due to a conflicting command
from another function, convert it to -EAGAIN.  If it is an ethtool
operation, this error code will be returned to userspace.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index e5da60a..02ac718 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4161,6 +4161,7 @@ static int bnxt_hwrm_to_stderr(u32 hwrm_err)
 	case HWRM_ERR_CODE_NO_BUFFER:
 		return -ENOMEM;
 	case HWRM_ERR_CODE_HOT_RESET_PROGRESS:
+	case HWRM_ERR_CODE_BUSY:
 		return -EAGAIN;
 	case HWRM_ERR_CODE_CMD_NOT_SUPPORTED:
 		return -EOPNOTSUPP;
-- 
2.5.1

[PATCH net-next 8/8] bnxt_en: Call devlink_port_type_clear() in remove()

[Michael Chan]

From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>

Similar to other drivers, properly clear the devlink port type when
removing the device before unregistration.

Cc: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 02ac718..4c9696a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -11429,6 +11429,8 @@ static void bnxt_remove_one(struct pci_dev *pdev)
 		bnxt_sriov_disable(bp);
 
 	bnxt_dl_fw_reporters_destroy(bp, true);
+	if (BNXT_PF(bp))
+		devlink_port_type_clear(&bp->dl_port);
 	pci_disable_pcie_error_reporting(pdev);
 	unregister_netdev(dev);
 	bnxt_dl_unregister(bp);
-- 
2.5.1

Re: [PATCH net-next 0/8] bnxt_en: Updates.

[David Miller]

From: Michael Chan <michael.chan@broadcom.com>
Date: Sun,  8 Mar 2020 18:45:46 -0400

> This series includes simplification and improvement of NAPI polling
> logic in bnxt_poll_p5().  The improvements will prevent starving the
> async events from firmware if we are in continuous NAPI polling.
> The rest of the patches include cleanups, a better return code for
> firmware busy, and to clear devlink port type more properly.

Series applied, thanks Michael.