RDMA/bnxt_re: Enhance RoCE SRIOV resource configuration design

Refine RoCE SRIOV resource configuration design,
using the INITIALIZE_FW's flag as an indication
for the new design to the firmware. RoCE driver does not
have to provision resources to VF when firmware
advertises support for RoCE resource management by NIC driver.

Signed-off-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
CC: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1730882676-24434-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 4127227..dd528dd 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -184,6 +184,7 @@ static int bnxt_re_setup_chip_ctx(struct bnxt_re_dev *rdev)
        rdev->rcfw.res = &rdev->qplib_res;
        rdev->qplib_res.dattr = &rdev->dev_attr;
        rdev->qplib_res.is_vf = BNXT_EN_VF(en_dev);
+       rdev->qplib_res.en_dev = en_dev;
 
        bnxt_re_set_drv_mode(rdev);
 
@@ -285,6 +286,10 @@ static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 
 static void bnxt_re_vf_res_config(struct bnxt_re_dev *rdev)
 {
+       /*
+        * Use the total VF count since the actual VF count may not be
+        * available at this point.
+        */
        rdev->num_vfs = pci_sriov_get_totalvfs(rdev->en_dev->pdev);
        if (!bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx)) {
                bnxt_re_set_resource_limits(rdev);
@@ -2056,11 +2061,9 @@ static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 op_type)
                INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
                set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
                schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
-               /*
-                * Use the total VF count since the actual VF count may not be
-                * available at this point.
-                */
-               bnxt_re_vf_res_config(rdev);
+
+               if (!(rdev->qplib_res.en_dev->flags & BNXT_EN_FLAG_ROCE_VF_RES_MGMT))
+                       bnxt_re_vf_res_config(rdev);
        }
        hash_init(rdev->cq_hash);
        if (rdev->chip_ctx->modes.toggle_bits & BNXT_QPLIB_SRQ_TOGGLE_BIT)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
index f5713e3..005079b 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
@@ -910,6 +910,8 @@ skip_ctx_setup:
                flags |= CMDQ_INITIALIZE_FW_FLAGS_HW_REQUESTER_RETX_SUPPORTED;
        if (_is_optimize_modify_qp_supported(rcfw->res->dattr->dev_cap_flags2))
                flags |= CMDQ_INITIALIZE_FW_FLAGS_OPTIMIZE_MODIFY_QP_SUPPORTED;
+       if (rcfw->res->en_dev->flags & BNXT_EN_FLAG_ROCE_VF_RES_MGMT)
+               flags |= CMDQ_INITIALIZE_FW_FLAGS_L2_VF_RESOURCE_MGMT;
        req.flags |= cpu_to_le16(flags);
        req.stat_ctx_id = cpu_to_le32(ctx->stats.fw_id);
        bnxt_qplib_fill_cmdqmsg(&msg, &req, &resp, NULL, sizeof(req), sizeof(resp), 0);

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.h b/drivers/infiniband/hw/bnxt_re/qplib_res.h
index 115910c..21fb148 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.h
@@ -39,6 +39,8 @@
 #ifndef __BNXT_QPLIB_RES_H__
 #define __BNXT_QPLIB_RES_H__
 
+#include "bnxt_ulp.h"
+
 extern const struct bnxt_qplib_gid bnxt_qplib_gid_zero;
 
 #define CHIP_NUM_57508         0x1750
@@ -302,6 +304,7 @@ struct bnxt_qplib_res {
        struct bnxt_qplib_chip_ctx      *cctx;
        struct bnxt_qplib_dev_attr      *dattr;
        struct net_device               *netdev;
+       struct bnxt_en_dev              *en_dev;
        struct bnxt_qplib_rcfw          *rcfw;
        struct bnxt_qplib_pd_tbl        pd_tbl;
        /* To protect the pd table bit map */

diff --git a/drivers/infiniband/hw/bnxt_re/roce_hsi.h b/drivers/infiniband/hw/bnxt_re/roce_hsi.h
index d9c5373..a98fc9c 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/roce_hsi.h
+++ b/drivers/infiniband/hw/bnxt_re/roce_hsi.h
@@ -217,6 +217,7 @@ struct cmdq_initialize_fw {
        #define CMDQ_INITIALIZE_FW_FLAGS_MRAV_RESERVATION_SPLIT          0x1UL
        #define CMDQ_INITIALIZE_FW_FLAGS_HW_REQUESTER_RETX_SUPPORTED     0x2UL
        #define CMDQ_INITIALIZE_FW_FLAGS_OPTIMIZE_MODIFY_QP_SUPPORTED    0x8UL
+       #define CMDQ_INITIALIZE_FW_FLAGS_L2_VF_RESOURCE_MGMT             0x10UL
        __le16  cookie;
        u8      resp_size;
        u8      reserved8;

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
index fdd6356..b771c84 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -414,6 +414,8 @@ static void bnxt_set_edev_info(struct bnxt_en_dev *edev, struct bnxt *bp)
                edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
        if (bp->flags & BNXT_FLAG_VF)
                edev->flags |= BNXT_EN_FLAG_VF;
+       if (BNXT_ROCE_VF_RESC_CAP(bp))
+               edev->flags |= BNXT_EN_FLAG_ROCE_VF_RES_MGMT;
 
        edev->chip_num = bp->chip_num;
        edev->hw_ring_stats_size = bp->hw_ring_stats_size;

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
index 4f4914f..5d6aac6 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
@@ -64,6 +64,7 @@ struct bnxt_en_dev {
        #define BNXT_EN_FLAG_ULP_STOPPED        0x8
        #define BNXT_EN_FLAG_VF                 0x10
 #define BNXT_EN_VF(edev)       ((edev)->flags & BNXT_EN_FLAG_VF)
+       #define BNXT_EN_FLAG_ROCE_VF_RES_MGMT   0x20
 
        struct bnxt_ulp                 *ulp_tbl;
        int                             l2_db_size;     /* Doorbell BAR size in