[PATCH rdma-next 1/3] bnxt_en: Add support for RoCE sriov configuration

[Selvin Xavier <selvin.xavier@broadcom.com>]

From: Vikas Gupta <vikas.gupta@broadcom.com>

On firmwares which support RoCE VF resource management by the
NIC driver, configure RoCE sriov resources while resources for
the VFs are allotted.

Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c       |  6 +++
 drivers/net/ethernet/broadcom/bnxt/bnxt.h       |  6 +++
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 53 +++++++++++++++++++++++++
 3 files changed, 65 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6e422e2..70230c5 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8151,6 +8151,9 @@ static int bnxt_hwrm_func_qcfg(struct bnxt *bp)
 	if (flags & FUNC_QCFG_RESP_FLAGS_RING_MONITOR_ENABLED)
 		bp->fw_cap |= BNXT_FW_CAP_RING_MONITOR;
 
+	if (flags & FUNC_QCFG_RESP_FLAGS_ENABLE_RDMA_SRIOV)
+		bp->fw_cap |= BNXT_FW_CAP_ENABLE_RDMA_SRIOV;
+
 	switch (resp->port_partition_type) {
 	case FUNC_QCFG_RESP_PORT_PARTITION_TYPE_NPAR1_0:
 	case FUNC_QCFG_RESP_PORT_PARTITION_TYPE_NPAR1_5:
@@ -9177,6 +9180,9 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 		bp->flags |= BNXT_FLAG_UDP_GSO_CAP;
 	if (flags_ext2 & FUNC_QCAPS_RESP_FLAGS_EXT2_TX_PKT_TS_CMPL_SUPPORTED)
 		bp->fw_cap |= BNXT_FW_CAP_TX_TS_CMP;
+	if (BNXT_PF(bp) &&
+	    (flags_ext2 & FUNC_QCAPS_RESP_FLAGS_EXT2_ROCE_VF_RESOURCE_MGMT_SUPPORTED))
+		bp->fw_cap |= BNXT_FW_CAP_ROCE_VF_RESC_MGMT_SUPPORTED;
 
 	bp->tx_push_thresh = 0;
 	if ((flags & FUNC_QCAPS_RESP_FLAGS_PUSH_MODE_SUPPORTED) &&
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 69231e8..2da6c7b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2406,6 +2406,8 @@ struct bnxt {
 	#define BNXT_FW_CAP_DCBX_AGENT			BIT_ULL(2)
 	#define BNXT_FW_CAP_NEW_RM			BIT_ULL(3)
 	#define BNXT_FW_CAP_IF_CHANGE			BIT_ULL(4)
+	#define BNXT_FW_CAP_ENABLE_RDMA_SRIOV           BIT_ULL(5)
+	#define BNXT_FW_CAP_ROCE_VF_RESC_MGMT_SUPPORTED	BIT_ULL(6)
 	#define BNXT_FW_CAP_KONG_MB_CHNL		BIT_ULL(7)
 	#define BNXT_FW_CAP_OVS_64BIT_HANDLE		BIT_ULL(10)
 	#define BNXT_FW_CAP_TRUSTED_VF			BIT_ULL(11)
@@ -2452,6 +2454,10 @@ struct bnxt {
 #define BNXT_SUPPORTS_QUEUE_API(bp)				\
 	(BNXT_PF(bp) && BNXT_SUPPORTS_NTUPLE_VNIC(bp) &&	\
 	 ((bp)->fw_cap & BNXT_FW_CAP_VNIC_RE_FLUSH))
+#define BNXT_RDMA_SRIOV_EN(bp)		\
+	((bp)->fw_cap & BNXT_FW_CAP_ENABLE_RDMA_SRIOV)
+#define BNXT_ROCE_VF_RESC_CAP(bp)	\
+	((bp)->fw_cap & BNXT_FW_CAP_ROCE_VF_RESC_MGMT_SUPPORTED)
 
 	u32			hwrm_spec_code;
 	u16			hwrm_cmd_seq;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index 7bb8a5d..12b6ed5 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -520,6 +520,56 @@ static int __bnxt_set_vf_params(struct bnxt *bp, int vf_id)
 	return hwrm_req_send(bp, req);
 }
 
+static void bnxt_hwrm_roce_sriov_cfg(struct bnxt *bp, int num_vfs)
+{
+	struct hwrm_func_qcaps_output *resp;
+	struct hwrm_func_cfg_input *cfg_req;
+	struct hwrm_func_qcaps_input *req;
+	int rc;
+
+	rc = hwrm_req_init(bp, req, HWRM_FUNC_QCAPS);
+	if (rc)
+		return;
+
+	req->fid = cpu_to_le16(0xffff);
+	resp = hwrm_req_hold(bp, req);
+	rc = hwrm_req_send(bp, req);
+	if (rc)
+		goto err;
+
+	rc = hwrm_req_init(bp, cfg_req, HWRM_FUNC_CFG);
+	if (rc)
+		goto err;
+
+	cfg_req->fid = cpu_to_le16(0xffff);
+	cfg_req->enables2 =
+		cpu_to_le32(FUNC_CFG_REQ_ENABLES2_ROCE_MAX_AV_PER_VF |
+			    FUNC_CFG_REQ_ENABLES2_ROCE_MAX_CQ_PER_VF |
+			    FUNC_CFG_REQ_ENABLES2_ROCE_MAX_MRW_PER_VF |
+			    FUNC_CFG_REQ_ENABLES2_ROCE_MAX_QP_PER_VF |
+			    FUNC_CFG_REQ_ENABLES2_ROCE_MAX_SRQ_PER_VF |
+			    FUNC_CFG_REQ_ENABLES2_ROCE_MAX_GID_PER_VF);
+	cfg_req->roce_max_av_per_vf =
+		cpu_to_le32(le32_to_cpu(resp->roce_vf_max_av) / num_vfs);
+	cfg_req->roce_max_cq_per_vf =
+		cpu_to_le32(le32_to_cpu(resp->roce_vf_max_cq) / num_vfs);
+	cfg_req->roce_max_mrw_per_vf =
+		cpu_to_le32(le32_to_cpu(resp->roce_vf_max_mrw) / num_vfs);
+	cfg_req->roce_max_qp_per_vf =
+		cpu_to_le32(le32_to_cpu(resp->roce_vf_max_qp) / num_vfs);
+	cfg_req->roce_max_srq_per_vf =
+		cpu_to_le32(le32_to_cpu(resp->roce_vf_max_srq) / num_vfs);
+	cfg_req->roce_max_gid_per_vf =
+		cpu_to_le32(le32_to_cpu(resp->roce_vf_max_gid) / num_vfs);
+
+	rc = hwrm_req_send(bp, cfg_req);
+
+err:
+	hwrm_req_drop(bp, req);
+	if (rc)
+		netdev_err(bp->dev, "RoCE sriov configuration failed\n");
+}
+
 /* Only called by PF to reserve resources for VFs, returns actual number of
  * VFs configured, or < 0 on error.
  */
@@ -759,6 +809,9 @@ int bnxt_cfg_hw_sriov(struct bnxt *bp, int *num_vfs, bool reset)
 		*num_vfs = rc;
 	}
 
+	if (BNXT_RDMA_SRIOV_EN(bp) && BNXT_ROCE_VF_RESC_CAP(bp))
+		bnxt_hwrm_roce_sriov_cfg(bp, *num_vfs);
+
 	return 0;
 }
 
-- 
2.5.5