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bnxt_en: Improve VF resource accounting. 

We need to keep track of all resources, such as rx rings, tx rings,
cmpl rings, rss contexts, stats contexts, vnics, after we have
divided them for the VFs.  Otherwise, subsequent ring changes on
the PF may not work correctly.

We adjust all max resources in struct bnxt_pf_info after they have been
assigned to the VFs.  There is no need to keep the separate
max_pf_tx_rings and max_pf_rx_rings.

When SR-IOV is disabled, we call bnxt_hwrm_func_qcaps() to restore the
max resources for the PF.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Michael Chan 2015-12-27 18:19:26 -05:00 committed by David S. Miller
parent 92268c328a
commit 4a21b49b34
3 changed files with 12 additions and 14 deletions
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8
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -3592,7 +3592,7 @@ static int bnxt_hwrm_stat_ctx_alloc(struct bnxt *bp)
return 0;
}
static int bnxt_hwrm_func_qcaps(struct bnxt *bp)
int bnxt_hwrm_func_qcaps(struct bnxt *bp)
{
int rc = 0;
struct hwrm_func_qcaps_input req = {0};
@ -3616,9 +3616,7 @@ static int bnxt_hwrm_func_qcaps(struct bnxt *bp)
pf->max_rsscos_ctxs = le16_to_cpu(resp->max_rsscos_ctx);
pf->max_cp_rings = le16_to_cpu(resp->max_cmpl_rings);
pf->max_tx_rings = le16_to_cpu(resp->max_tx_rings);
pf->max_pf_tx_rings = pf->max_tx_rings;
pf->max_rx_rings = le16_to_cpu(resp->max_rx_rings);
pf->max_pf_rx_rings = pf->max_rx_rings;
pf->max_l2_ctxs = le16_to_cpu(resp->max_l2_ctxs);
pf->max_vnics = le16_to_cpu(resp->max_vnics);
pf->max_stat_ctxs = le16_to_cpu(resp->max_stat_ctx);
@ -5623,8 +5621,8 @@ void bnxt_get_max_rings(struct bnxt *bp, int *max_rx, int *max_tx)
int max_rings = 0;
if (BNXT_PF(bp)) {
*max_tx = bp->pf.max_pf_tx_rings;
*max_rx = bp->pf.max_pf_rx_rings;
*max_tx = bp->pf.max_tx_rings;
*max_rx = bp->pf.max_rx_rings;
max_rings = min_t(int, bp->pf.max_irqs, bp->pf.max_cp_rings);
max_rings = min_t(int, max_rings, bp->pf.max_stat_ctxs);
} else {

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

@ -722,9 +722,7 @@ struct bnxt_pf_info {
u16 max_rsscos_ctxs;
u16 max_cp_rings;
u16 max_tx_rings; /* HW assigned max tx rings for this PF */
u16 max_pf_tx_rings; /* runtime max tx rings owned by PF */
u16 max_rx_rings; /* HW assigned max rx rings for this PF */
u16 max_pf_rx_rings; /* runtime max rx rings owned by PF */
u16 max_irqs;
u16 max_l2_ctxs;
u16 max_vnics;
@ -1084,6 +1082,7 @@ void bnxt_hwrm_cmd_hdr_init(struct bnxt *, void *, u16, u16, u16);
int _hwrm_send_message(struct bnxt *, void *, u32, int);
int hwrm_send_message(struct bnxt *, void *, u32, int);
int bnxt_hwrm_set_coal(struct bnxt *);
int bnxt_hwrm_func_qcaps(struct bnxt *);
int bnxt_hwrm_set_pause(struct bnxt *);
int bnxt_hwrm_set_link_setting(struct bnxt *, bool);
int bnxt_open_nic(struct bnxt *, bool, bool);

15
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
View File

@ -427,11 +427,12 @@ static int bnxt_hwrm_func_cfg(struct bnxt *bp, int num_vfs)
}
mutex_unlock(&bp->hwrm_cmd_lock);
if (!rc) {
pf->max_pf_tx_rings = bp->tx_nr_rings;
if (bp->flags & BNXT_FLAG_AGG_RINGS)
pf->max_pf_rx_rings = bp->rx_nr_rings * 2;
else
pf->max_pf_rx_rings = bp->rx_nr_rings;
pf->max_tx_rings -= vf_tx_rings * num_vfs;
pf->max_rx_rings -= vf_rx_rings * num_vfs;
pf->max_cp_rings -= vf_cp_rings * num_vfs;
pf->max_rsscos_ctxs -= num_vfs;
pf->max_stat_ctxs -= vf_stat_ctx * num_vfs;
pf->max_vnics -= vf_vnics * num_vfs;
}
return rc;
}
@ -535,8 +536,8 @@ void bnxt_sriov_disable(struct bnxt *bp)
bnxt_free_vf_resources(bp);
bp->pf.active_vfs = 0;
bp->pf.max_pf_rx_rings = bp->pf.max_rx_rings;
bp->pf.max_pf_tx_rings = bp->pf.max_tx_rings;
/* Reclaim all resources for the PF. */
bnxt_hwrm_func_qcaps(bp);
}
int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs)