netdev - [PATCH net-next RFC 3/3] bnxt_en: Implement .ndo_set_vf

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1525864903-32619-4-git-send-email-michael.chan@broadcom.com>
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