netdev - [PATCH rdma-next 01/10] bnxt_en: Enhance stats context reservation logic

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Message-ID: <20250822040801.776196-2-kalesh-anakkur.purayil@broadcom.com>
Date: Fri, 22 Aug 2025 09:37:52 +0530
From: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
To: leon@...nel.org,
	jgg@...pe.ca
Cc: linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org,
	andrew.gospodarek@...adcom.com,
	selvin.xavier@...adcom.com,
	michael.chan@...adcom.com,
	Saravanan Vajravel <saravanan.vajravel@...adcom.com>,
	Somnath Kotur <somnath.kotur@...adcom.com>,
	Kashyap Desai <kashyap.desai@...adcom.com>,
	Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Subject: [PATCH rdma-next 01/10] bnxt_en: Enhance stats context reservation logic

From: Saravanan Vajravel <saravanan.vajravel@...adcom.com>

When the firmware advertises that the device is capable of supporting
port mirroring on RoCE device, reserve one additional stat_ctx.
To support port mirroring feature, RDMA driver allocates one stat_ctx
for exclusive use in RawEth QP.

Signed-off-by: Saravanan Vajravel <saravanan.vajravel@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@...adcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@...adcom.com>
Reviewed-by: Michael Chan <michael.chan@...adcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 8 ++++++--
 drivers/net/ethernet/broadcom/bnxt/bnxt.h     | 3 +++
 drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 6 ++++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 5578ddcb465d..751840fff0dc 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9601,10 +9601,10 @@ static int __bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 
 static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 {
+	u32 flags, flags_ext, flags_ext2, flags_ext3;
+	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
 	struct hwrm_func_qcaps_output *resp;
 	struct hwrm_func_qcaps_input *req;
-	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
-	u32 flags, flags_ext, flags_ext2;
 	int rc;
 
 	rc = hwrm_req_init(bp, req, HWRM_FUNC_QCAPS);
@@ -9671,6 +9671,10 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 	    (flags_ext2 & FUNC_QCAPS_RESP_FLAGS_EXT2_ROCE_VF_RESOURCE_MGMT_SUPPORTED))
 		bp->fw_cap |= BNXT_FW_CAP_ROCE_VF_RESC_MGMT_SUPPORTED;
 
+	flags_ext3 = le32_to_cpu(resp->flags_ext3);
+	if (flags_ext3 & FUNC_QCAPS_RESP_FLAGS_EXT3_MIRROR_ON_ROCE_SUPPORTED)
+		bp->fw_cap |= BNXT_FW_CAP_MIRROR_ON_ROCE;
+
 	bp->tx_push_thresh = 0;
 	if ((flags & FUNC_QCAPS_RESP_FLAGS_PUSH_MODE_SUPPORTED) &&
 	    BNXT_FW_MAJ(bp) > 217)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index fda0d3cc6227..fa2b39b55e68 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2507,6 +2507,7 @@ struct bnxt {
 	#define BNXT_FW_CAP_VNIC_RE_FLUSH		BIT_ULL(40)
 	#define BNXT_FW_CAP_SW_MAX_RESOURCE_LIMITS	BIT_ULL(41)
 	#define BNXT_FW_CAP_NPAR_1_2			BIT_ULL(42)
+	#define BNXT_FW_CAP_MIRROR_ON_ROCE		BIT_ULL(43)
 
 	u32			fw_dbg_cap;
 
@@ -2528,6 +2529,8 @@ struct bnxt {
 	((bp)->fw_cap & BNXT_FW_CAP_ROCE_VF_RESC_MGMT_SUPPORTED)
 #define BNXT_SW_RES_LMT(bp)		\
 	((bp)->fw_cap & BNXT_FW_CAP_SW_MAX_RESOURCE_LIMITS)
+#define BNXT_MIRROR_ON_ROCE_CAP(bp)	\
+	((bp)->fw_cap & BNXT_FW_CAP_MIRROR_ON_ROCE)
 
 	u32			hwrm_spec_code;
 	u16			hwrm_cmd_seq;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
index 61cf201bb0dc..f8c2c72b382d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -100,6 +100,12 @@ void bnxt_set_dflt_ulp_stat_ctxs(struct bnxt *bp)
 		if (BNXT_PF(bp) && !bp->pf.port_id &&
 		    bp->port_count > 1)
 			bp->edev->ulp_num_ctxs++;
+
+		/* Reserve one additional stat_ctx when the device is capable
+		 * of supporting port mirroring on RDMA device.
+		 */
+		if (BNXT_MIRROR_ON_ROCE_CAP(bp))
+			bp->edev->ulp_num_ctxs++;
 	}
 }
 
-- 
2.43.5