netdev - [PATCH rdma-next 06/10] RDMA/bnxt_re: Add support for mirror vnic

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Message-ID: <20250822040801.776196-7-kalesh-anakkur.purayil@broadcom.com>
Date: Fri, 22 Aug 2025 09:37:57 +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>,
	Kashyap Desai <kashyap.desai@...adcom.com>,
	Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Subject: [PATCH rdma-next 06/10] RDMA/bnxt_re: Add support for mirror vnic

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

Added below support:
- Querying the pre-reserved mirror_vnic_id
- Allocating/freeing mirror_vnic
- Configuring mirror vnic to associate it with raw qp

These functions will be used in the subsequent patch in this series.

Signed-off-by: Saravanan Vajravel <saravanan.vajravel@...adcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@...adcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
---
 drivers/infiniband/hw/bnxt_re/bnxt_re.h |  4 ++
 drivers/infiniband/hw/bnxt_re/main.c    | 67 +++++++++++++++++++++++++
 2 files changed, 71 insertions(+)

diff --git a/drivers/infiniband/hw/bnxt_re/bnxt_re.h b/drivers/infiniband/hw/bnxt_re/bnxt_re.h
index 1cb57c8246cc..3f7f6cefe771 100644
--- a/drivers/infiniband/hw/bnxt_re/bnxt_re.h
+++ b/drivers/infiniband/hw/bnxt_re/bnxt_re.h
@@ -250,6 +250,10 @@ int bnxt_re_assign_pma_port_counters(struct bnxt_re_dev *rdev, struct ib_mad *ou
 int bnxt_re_assign_pma_port_ext_counters(struct bnxt_re_dev *rdev,
 					 struct ib_mad *out_mad);
 
+void bnxt_re_hwrm_free_vnic(struct bnxt_re_dev *rdev);
+int bnxt_re_hwrm_alloc_vnic(struct bnxt_re_dev *rdev);
+int bnxt_re_hwrm_cfg_vnic(struct bnxt_re_dev *rdev, u32 qp_id);
+
 static inline struct device *rdev_to_dev(struct bnxt_re_dev *rdev)
 {
 	if (rdev)
diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 479c2a390885..07d25deffabe 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -540,6 +540,72 @@ static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
 	fw_msg->timeout = timeout;
 }
 
+void bnxt_re_hwrm_free_vnic(struct bnxt_re_dev *rdev)
+{
+	struct bnxt_en_dev *en_dev = rdev->en_dev;
+	struct hwrm_vnic_free_input req = {};
+	struct bnxt_fw_msg fw_msg = {};
+	int rc;
+
+	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_VNIC_FREE);
+
+	req.vnic_id = cpu_to_le32(rdev->mirror_vnic_id);
+	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), NULL,
+			    0, DFLT_HWRM_CMD_TIMEOUT);
+	rc = bnxt_send_msg(en_dev, &fw_msg);
+	if (rc)
+		ibdev_dbg(&rdev->ibdev,
+			  "Failed to free vnic, rc = %d\n", rc);
+}
+
+int bnxt_re_hwrm_alloc_vnic(struct bnxt_re_dev *rdev)
+{
+	struct bnxt_en_dev *en_dev = rdev->en_dev;
+	struct hwrm_vnic_alloc_output resp = {};
+	struct hwrm_vnic_alloc_input req = {};
+	struct bnxt_fw_msg fw_msg = {};
+	int rc;
+
+	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_VNIC_ALLOC);
+
+	req.vnic_id = cpu_to_le16(rdev->mirror_vnic_id);
+	req.flags = cpu_to_le32(VNIC_ALLOC_REQ_FLAGS_VNIC_ID_VALID);
+	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
+			    sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
+	rc = bnxt_send_msg(en_dev, &fw_msg);
+	if (rc)
+		ibdev_dbg(&rdev->ibdev,
+			  "Failed to alloc vnic, rc = %d\n", rc);
+
+	return rc;
+}
+
+int bnxt_re_hwrm_cfg_vnic(struct bnxt_re_dev *rdev, u32 qp_id)
+{
+	struct bnxt_en_dev *en_dev = rdev->en_dev;
+	struct hwrm_vnic_cfg_input req = {};
+	struct bnxt_fw_msg fw_msg = {};
+	int rc;
+
+	bnxt_re_init_hwrm_hdr((void *)&req, HWRM_VNIC_CFG);
+
+	req.flags = cpu_to_le32(VNIC_CFG_REQ_FLAGS_ROCE_ONLY_VNIC_MODE);
+	req.enables = cpu_to_le32(VNIC_CFG_REQ_ENABLES_RAW_QP_ID |
+				  VNIC_CFG_REQ_ENABLES_MRU);
+	req.vnic_id = cpu_to_le16(rdev->mirror_vnic_id);
+	req.raw_qp_id = cpu_to_le32(qp_id);
+	req.mru = cpu_to_le16(rdev->netdev->mtu + VLAN_ETH_HLEN);
+
+	bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), NULL,
+			    0, DFLT_HWRM_CMD_TIMEOUT);
+	rc = bnxt_send_msg(en_dev, &fw_msg);
+	if (rc)
+		ibdev_dbg(&rdev->ibdev,
+			  "Failed to cfg vnic, rc = %d\n", rc);
+
+	return rc;
+}
+
 /* Query device config using common hwrm */
 static int bnxt_re_hwrm_qcfg(struct bnxt_re_dev *rdev, u32 *db_len,
 			     u32 *offset)
@@ -558,6 +624,7 @@ static int bnxt_re_hwrm_qcfg(struct bnxt_re_dev *rdev, u32 *db_len,
 	if (!rc) {
 		*db_len = PAGE_ALIGN(le16_to_cpu(resp.l2_doorbell_bar_size_kb) * 1024);
 		*offset = PAGE_ALIGN(le16_to_cpu(resp.legacy_l2_db_size_kb) * 1024);
+		rdev->mirror_vnic_id = le16_to_cpu(resp.mirror_vnic_id);
 	}
 	return rc;
 }
-- 
2.43.5