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bnxt_en: Add new VF resource allocation strategy mode.

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The new mode is "minimal-static" to be used when resources are more
limited to support a large number of VFs, for example  The PF driver
will provision guaranteed minimum resources of 0.  Each VF has no
guranteed resources until it tries to reserve resources during device
open.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2018-08-05 16:51:50 -04:00 committed by David S. Miller
parent a1ef4a7920
commit bf82736da3
3 changed files with 16 additions and 10 deletions
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2
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -5162,7 +5162,7 @@ int bnxt_hwrm_func_resc_qcaps(struct bnxt *bp, bool all)
pf->vf_resv_strategy =
le16_to_cpu(resp->vf_reservation_strategy);
if (pf->vf_resv_strategy > BNXT_VF_RESV_STRATEGY_MINIMAL)
if (pf->vf_resv_strategy > BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC)
pf->vf_resv_strategy = BNXT_VF_RESV_STRATEGY_MAXIMAL;
}
hwrm_func_resc_qcaps_exit:

1
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -862,6 +862,7 @@ struct bnxt_pf_info {
u8 vf_resv_strategy;
#define BNXT_VF_RESV_STRATEGY_MAXIMAL 0
#define BNXT_VF_RESV_STRATEGY_MINIMAL 1
#define BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC 2
void *hwrm_cmd_req_addr[4];
dma_addr_t hwrm_cmd_req_dma_addr[4];
struct bnxt_vf_info *vf;

23
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
View File

@ -447,7 +447,7 @@ static int bnxt_hwrm_func_vf_resc_cfg(struct bnxt *bp, int num_vfs)
u16 vf_tx_rings, vf_rx_rings, vf_cp_rings;
u16 vf_stat_ctx, vf_vnics, vf_ring_grps;
struct bnxt_pf_info *pf = &bp->pf;
int i, rc = 0;
int i, rc = 0, min = 1;
bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_RESOURCE_CFG, -1, -1);
@ -464,14 +464,19 @@ static int bnxt_hwrm_func_vf_resc_cfg(struct bnxt *bp, int num_vfs)
req.min_rsscos_ctx = cpu_to_le16(BNXT_VF_MIN_RSS_CTX);
req.max_rsscos_ctx = cpu_to_le16(BNXT_VF_MAX_RSS_CTX);
if (pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL) {
req.min_cmpl_rings = cpu_to_le16(1);
req.min_tx_rings = cpu_to_le16(1);
req.min_rx_rings = cpu_to_le16(1);
req.min_l2_ctxs = cpu_to_le16(BNXT_VF_MIN_L2_CTX);
req.min_vnics = cpu_to_le16(1);
req.min_stat_ctx = cpu_to_le16(1);
req.min_hw_ring_grps = cpu_to_le16(1);
if (pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC) {
min = 0;
req.min_rsscos_ctx = cpu_to_le16(min);
}
if (pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL ||
pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC) {
req.min_cmpl_rings = cpu_to_le16(min);
req.min_tx_rings = cpu_to_le16(min);
req.min_rx_rings = cpu_to_le16(min);
req.min_l2_ctxs = cpu_to_le16(min);
req.min_vnics = cpu_to_le16(min);
req.min_stat_ctx = cpu_to_le16(min);
req.min_hw_ring_grps = cpu_to_le16(min);
} else {
vf_cp_rings /= num_vfs;
vf_tx_rings /= num_vfs;