RDMA/bnxt_re: Add support for mirror vnic

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@broadcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20250822040801.776196-7-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index a6ff21aa139a..a284f762738a 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;
 }