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Date: Wed, 9 May 2018 07:21:43 -0400
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org
Subject: [PATCH net-next RFC 3/3] bnxt_en: Implement .ndo_set_vf_queues().
Implement .ndo_set_vf_queues() on the PF driver to configure the queues
parameters for individual VFs. This allows the admin. on the host to
increase or decrease queues for individual VFs.
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 1 +
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 67 +++++++++++++++++++++++++
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h | 2 +
3 files changed, 70 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index dfa0839..2ce9779 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8373,6 +8373,7 @@ static int bnxt_swdev_port_attr_get(struct net_device *dev,
.ndo_set_vf_link_state = bnxt_set_vf_link_state,
.ndo_set_vf_spoofchk = bnxt_set_vf_spoofchk,
.ndo_set_vf_trust = bnxt_set_vf_trust,
+ .ndo_set_vf_queues = bnxt_set_vf_queues,
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = bnxt_poll_controller,
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index 489e534..f0d938c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -138,6 +138,73 @@ int bnxt_set_vf_trust(struct net_device *dev, int vf_id, bool trusted)
return 0;
}
+static bool bnxt_param_ok(int new, u16 curr, u16 avail)
+{
+ int delta;
+
+ if (new <= curr)
+ return true;
+
+ delta = new - curr;
+ if (delta <= avail)
+ return true;
+ return false;
+}
+
+int bnxt_set_vf_queues(struct net_device *dev, int vf_id, int min_txq,
+ int max_txq, int min_rxq, int max_rxq)
+{
+ struct hwrm_func_vf_resource_cfg_input req = {0};
+ struct bnxt *bp = netdev_priv(dev);
+ u16 avail_tx_rings, avail_rx_rings;
+ struct bnxt_hw_resc *hw_resc;
+ struct bnxt_vf_info *vf;
+ int rc;
+
+ if (bnxt_vf_ndo_prep(bp, vf_id))
+ return -EINVAL;
+
+ if (!(bp->flags & BNXT_FLAG_NEW_RM))
+ return -EOPNOTSUPP;
+
+ vf = &bp->pf.vf[vf_id];
+ hw_resc = &bp->hw_resc;
+
+ avail_tx_rings = hw_resc->max_tx_rings - bp->tx_nr_rings;
+ if (bp->flags & BNXT_FLAG_AGG_RINGS)
+ avail_rx_rings = hw_resc->max_rx_rings - bp->rx_nr_rings * 2;
+ else
+ avail_rx_rings = hw_resc->max_rx_rings - bp->rx_nr_rings;
+ if (!bnxt_param_ok(min_txq, vf->min_tx_rings, avail_tx_rings))
+ return -ENOBUFS;
+ if (!bnxt_param_ok(min_rxq, vf->min_rx_rings, avail_rx_rings))
+ return -ENOBUFS;
+ if (!bnxt_param_ok(max_txq, vf->max_tx_rings, avail_tx_rings))
+ return -ENOBUFS;
+ if (!bnxt_param_ok(max_rxq, vf->max_rx_rings, avail_rx_rings))
+ return -ENOBUFS;
+
+ bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_RESOURCE_CFG, -1, -1);
+ memcpy(&req, &bp->vf_resc_cfg_input, sizeof(req));
+ req.min_tx_rings = cpu_to_le16(min_txq);
+ req.min_rx_rings = cpu_to_le16(min_rxq);
+ req.max_tx_rings = cpu_to_le16(max_txq);
+ req.max_rx_rings = cpu_to_le16(max_rxq);
+ rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+ if (rc)
+ return -EIO;
+
+ hw_resc->max_tx_rings += vf->min_tx_rings;
+ hw_resc->max_rx_rings += vf->min_rx_rings;
+ vf->min_tx_rings = min_txq;
+ vf->max_tx_rings = max_txq;
+ vf->min_rx_rings = min_rxq;
+ vf->max_rx_rings = max_rxq;
+ hw_resc->max_tx_rings -= vf->min_tx_rings;
+ hw_resc->max_rx_rings -= vf->min_rx_rings;
+ return 0;
+}
+
int bnxt_get_vf_config(struct net_device *dev, int vf_id,
struct ifla_vf_info *ivi)
{
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h
index e9b20cd..325b412 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h
@@ -35,6 +35,8 @@
int bnxt_set_vf_link_state(struct net_device *, int, int);
int bnxt_set_vf_spoofchk(struct net_device *, int, bool);
int bnxt_set_vf_trust(struct net_device *dev, int vf_id, bool trust);
+int bnxt_set_vf_queues(struct net_device *dev, int vf_id, int min_txq,
+ int max_txq, int min_rxq, int max_rxq);
int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs);
void bnxt_sriov_disable(struct bnxt *);
void bnxt_hwrm_exec_fwd_req(struct bnxt *);
--
1.8.3.1
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