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-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c8
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.h3
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c121
3 files changed, 127 insertions, 5 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 8b74e6e86bb4..de79c9049181 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5018,6 +5018,14 @@ static int bnxt_hwrm_func_resc_qcaps(struct bnxt *bp)
hw_resc->min_stat_ctxs = le16_to_cpu(resp->min_stat_ctx);
hw_resc->max_stat_ctxs = le16_to_cpu(resp->max_stat_ctx);
+ if (BNXT_PF(bp)) {
+ struct bnxt_pf_info *pf = &bp->pf;
+
+ pf->vf_resv_strategy =
+ le16_to_cpu(resp->vf_reservation_strategy);
+ if (pf->vf_resv_strategy > BNXT_VF_RESV_STRATEGY_MINIMAL)
+ pf->vf_resv_strategy = BNXT_VF_RESV_STRATEGY_MAXIMAL;
+ }
hwrm_func_resc_qcaps_exit:
mutex_unlock(&bp->hwrm_cmd_lock);
return rc;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 9d1298505e43..920c19bf7baa 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -836,6 +836,9 @@ struct bnxt_pf_info {
u32 max_rx_wm_flows;
unsigned long *vf_event_bmap;
u16 hwrm_cmd_req_pages;
+ u8 vf_resv_strategy;
+#define BNXT_VF_RESV_STRATEGY_MAXIMAL 0
+#define BNXT_VF_RESV_STRATEGY_MINIMAL 1
void *hwrm_cmd_req_addr[4];
dma_addr_t hwrm_cmd_req_dma_addr[4];
struct bnxt_vf_info *vf;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index b36928668dbb..508e917c7adc 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -416,7 +416,100 @@ static int bnxt_hwrm_func_buf_rgtr(struct bnxt *bp)
return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
}
-/* only call by PF to reserve resources for VF */
+/* Only called by PF to reserve resources for VFs, returns actual number of
+ * VFs configured, or < 0 on error.
+ */
+static int bnxt_hwrm_func_vf_resc_cfg(struct bnxt *bp, int num_vfs)
+{
+ struct hwrm_func_vf_resource_cfg_input req = {0};
+ struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
+ 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;
+
+ bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_RESOURCE_CFG, -1, -1);
+
+ vf_cp_rings = hw_resc->max_cp_rings - bp->cp_nr_rings;
+ vf_stat_ctx = hw_resc->max_stat_ctxs - bp->num_stat_ctxs;
+ if (bp->flags & BNXT_FLAG_AGG_RINGS)
+ vf_rx_rings = hw_resc->max_rx_rings - bp->rx_nr_rings * 2;
+ else
+ vf_rx_rings = hw_resc->max_rx_rings - bp->rx_nr_rings;
+ vf_ring_grps = hw_resc->max_hw_ring_grps - bp->rx_nr_rings;
+ vf_tx_rings = hw_resc->max_tx_rings - bp->tx_nr_rings;
+ vf_vnics = hw_resc->max_vnics - bp->nr_vnics;
+ vf_vnics = min_t(u16, vf_vnics, vf_rx_rings);
+
+ req.min_rsscos_ctx = cpu_to_le16(1);
+ req.max_rsscos_ctx = cpu_to_le16(1);
+ 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(1);
+ req.min_vnics = cpu_to_le16(1);
+ req.min_stat_ctx = cpu_to_le16(1);
+ req.min_hw_ring_grps = cpu_to_le16(1);
+ } else {
+ vf_cp_rings /= num_vfs;
+ vf_tx_rings /= num_vfs;
+ vf_rx_rings /= num_vfs;
+ vf_vnics /= num_vfs;
+ vf_stat_ctx /= num_vfs;
+ vf_ring_grps /= num_vfs;
+
+ req.min_cmpl_rings = cpu_to_le16(vf_cp_rings);
+ req.min_tx_rings = cpu_to_le16(vf_tx_rings);
+ req.min_rx_rings = cpu_to_le16(vf_rx_rings);
+ req.min_l2_ctxs = cpu_to_le16(4);
+ req.min_vnics = cpu_to_le16(vf_vnics);
+ req.min_stat_ctx = cpu_to_le16(vf_stat_ctx);
+ req.min_hw_ring_grps = cpu_to_le16(vf_ring_grps);
+ }
+ req.max_cmpl_rings = cpu_to_le16(vf_cp_rings);
+ req.max_tx_rings = cpu_to_le16(vf_tx_rings);
+ req.max_rx_rings = cpu_to_le16(vf_rx_rings);
+ req.max_l2_ctxs = cpu_to_le16(4);
+ req.max_vnics = cpu_to_le16(vf_vnics);
+ req.max_stat_ctx = cpu_to_le16(vf_stat_ctx);
+ req.max_hw_ring_grps = cpu_to_le16(vf_ring_grps);
+
+ mutex_lock(&bp->hwrm_cmd_lock);
+ for (i = 0; i < num_vfs; i++) {
+ req.vf_id = cpu_to_le16(pf->first_vf_id + i);
+ rc = _hwrm_send_message(bp, &req, sizeof(req),
+ HWRM_CMD_TIMEOUT);
+ if (rc) {
+ rc = -ENOMEM;
+ break;
+ }
+ pf->active_vfs = i + 1;
+ pf->vf[i].fw_fid = pf->first_vf_id + i;
+ }
+ mutex_unlock(&bp->hwrm_cmd_lock);
+ if (pf->active_vfs) {
+ u16 n = 1;
+
+ if (pf->vf_resv_strategy != BNXT_VF_RESV_STRATEGY_MINIMAL)
+ n = pf->active_vfs;
+
+ hw_resc->max_tx_rings -= vf_tx_rings * n;
+ hw_resc->max_rx_rings -= vf_rx_rings * n;
+ hw_resc->max_hw_ring_grps -= vf_ring_grps * n;
+ hw_resc->max_cp_rings -= vf_cp_rings * n;
+ hw_resc->max_rsscos_ctxs -= pf->active_vfs;
+ hw_resc->max_stat_ctxs -= vf_stat_ctx * n;
+ hw_resc->max_vnics -= vf_vnics * n;
+
+ rc = pf->active_vfs;
+ }
+ return rc;
+}
+
+/* Only called by PF to reserve resources for VFs, returns actual number of
+ * VFs configured, or < 0 on error.
+ */
static int bnxt_hwrm_func_cfg(struct bnxt *bp, int num_vfs)
{
u32 rc = 0, mtu, i;
@@ -489,7 +582,9 @@ static int bnxt_hwrm_func_cfg(struct bnxt *bp, int num_vfs)
total_vf_tx_rings += vf_tx_rsvd;
}
mutex_unlock(&bp->hwrm_cmd_lock);
- if (!rc) {
+ if (rc)
+ rc = -ENOMEM;
+ if (pf->active_vfs) {
hw_resc->max_tx_rings -= total_vf_tx_rings;
hw_resc->max_rx_rings -= vf_rx_rings * num_vfs;
hw_resc->max_hw_ring_grps -= vf_ring_grps * num_vfs;
@@ -497,10 +592,19 @@ static int bnxt_hwrm_func_cfg(struct bnxt *bp, int num_vfs)
hw_resc->max_rsscos_ctxs -= num_vfs;
hw_resc->max_stat_ctxs -= vf_stat_ctx * num_vfs;
hw_resc->max_vnics -= vf_vnics * num_vfs;
+ rc = pf->active_vfs;
}
return rc;
}
+static int bnxt_func_cfg(struct bnxt *bp, int num_vfs)
+{
+ if (bp->flags & BNXT_FLAG_NEW_RM)
+ return bnxt_hwrm_func_vf_resc_cfg(bp, num_vfs);
+ else
+ return bnxt_hwrm_func_cfg(bp, num_vfs);
+}
+
static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs)
{
int rc = 0, vfs_supported;
@@ -567,9 +671,16 @@ static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs)
goto err_out1;
/* Reserve resources for VFs */
- rc = bnxt_hwrm_func_cfg(bp, *num_vfs);
- if (rc)
- goto err_out2;
+ rc = bnxt_func_cfg(bp, *num_vfs);
+ if (rc != *num_vfs) {
+ if (rc <= 0) {
+ netdev_warn(bp->dev, "Unable to reserve resources for SRIOV.\n");
+ *num_vfs = 0;
+ goto err_out2;
+ }
+ netdev_warn(bp->dev, "Only able to reserve resources for %d VFs.\n", rc);
+ *num_vfs = rc;
+ }
/* Register buffers for VFs */
rc = bnxt_hwrm_func_buf_rgtr(bp);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.