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bnxt_en: Support for RoCE resources dynamically shared within VFs.

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Add support for dynamic RoCE SRIOV resource configuration.  Instead of
statically dividing the RoCE resources by the number of VFs, provide
the maximum resources and let the FW dynamically dsitribute to the VFs
on the fly.

Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Anantha Prabhu <anantha.prabhu@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250917040839.1924698-8-michael.chan@broadcom.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Anantha Prabhu
2025-09-16 21:08:36 -07:00
committed by Paolo Abeni
parent 6f115863f7
commit 48e6196278
3 changed files with 16 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@@ -9632,10 +9632,10 @@ no_ptp:
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);
@@ -9702,6 +9702,10 @@ 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_ROCE_VF_DYN_ALLOC_SUPPORT)
bp->fw_cap |= BNXT_FW_CAP_ROCE_VF_DYN_ALLOC_SUPPORT;
bp->tx_push_thresh = 0;
if ((flags & FUNC_QCAPS_RESP_FLAGS_PUSH_MODE_SUPPORTED) &&
BNXT_FW_MAJ(bp) > 217)

3
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@@ -2479,6 +2479,7 @@ struct bnxt {
#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_ROCE_VF_DYN_ALLOC_SUPPORT BIT_ULL(8)
#define BNXT_FW_CAP_OVS_64BIT_HANDLE BIT_ULL(10)
#define BNXT_FW_CAP_TRUSTED_VF BIT_ULL(11)
#define BNXT_FW_CAP_ERROR_RECOVERY BIT_ULL(13)
@@ -2523,6 +2524,8 @@ struct bnxt {
#define BNXT_SUPPORTS_MULTI_RSS_CTX(bp) \
(BNXT_PF(bp) && BNXT_SUPPORTS_NTUPLE_VNIC(bp) && \
((bp)->rss_cap & BNXT_RSS_CAP_MULTI_RSS_CTX))
#define BNXT_ROCE_VF_DYN_ALLOC_CAP(bp) \
((bp)->fw_cap & BNXT_FW_CAP_ROCE_VF_DYN_ALLOC_SUPPORT)
#define BNXT_SUPPORTS_QUEUE_API(bp) \
(BNXT_PF(bp) && BNXT_SUPPORTS_NTUPLE_VNIC(bp) && \
((bp)->fw_cap & BNXT_FW_CAP_VNIC_RE_FLUSH))

7
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
View File

@@ -541,6 +541,13 @@ static void bnxt_hwrm_roce_sriov_cfg(struct bnxt *bp, int num_vfs)
if (rc)
goto err;
/* In case of VF Dynamic resource allocation, driver will provision
* maximum resources to all the VFs. FW will dynamically allocate
* resources to VFs on the fly, so always divide the resources by 1.
*/
if (BNXT_ROCE_VF_DYN_ALLOC_CAP(bp))
num_vfs = 1;
cfg_req->fid = cpu_to_le16(0xffff);
cfg_req->enables2 =
cpu_to_le32(FUNC_CFG_REQ_ENABLES2_ROCE_MAX_AV_PER_VF |