octeontx2-pf: Add support for SR-IOV management functions

This patch adds support for ndo_set_vf_mac, ndo_set_vf_vlan
and ndo_get_vf_config handlers. The traffic redirection
based on the VF mac address or vlan id is done by installing
MCAM rules. Reserved RX_VTAG_TYPE7 in each NIXLF for VF VLAN
which strips the VLAN tag from ingress VLAN traffic. The NIX PF
allocates two MCAM entries for VF VLAN feature, one used for
ingress VTAG strip and another entry for egress VTAG insertion.

This patch also updates the MAC address in PF installed VF VLAN
rule upon receiving nix_lf_start_rx mbox request for VF since
Administrative Function driver will assign a valid MAC addr
in nix_lf_start_rx function.

Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Co-developed-by: Tomasz Duszynski <tduszynski@marvell.com>
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 246 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 22513e58f7bb..4c82f60f3cf3 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -1425,6 +1425,8 @@ static void otx2_free_hw_resources(struct otx2_nic *pf)
 	free_req = otx2_mbox_alloc_msg_nix_lf_free(mbox);
 	if (free_req) {
 		free_req->flags = NIX_LF_DISABLE_FLOWS;
+		if (!(pf->flags & OTX2_FLAG_PF_SHUTDOWN))
+			free_req->flags |= NIX_LF_DONT_FREE_TX_VTAG;
 		if (otx2_sync_mbox_msg(mbox))
 			dev_err(pf->dev, "%s failed to free nixlf\n", __func__);
 	}
@@ -1928,6 +1930,245 @@ static int otx2_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
 	}
 }
 
+static int otx2_do_set_vf_mac(struct otx2_nic *pf, int vf, const u8 *mac)
+{
+	struct npc_install_flow_req *req;
+	int err;
+
+	mutex_lock(&pf->mbox.lock);
+	req = otx2_mbox_alloc_msg_npc_install_flow(&pf->mbox);
+	if (!req) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	ether_addr_copy(req->packet.dmac, mac);
+	eth_broadcast_addr((u8 *)&req->mask.dmac);
+	req->features = BIT_ULL(NPC_DMAC);
+	req->channel = pf->hw.rx_chan_base;
+	req->intf = NIX_INTF_RX;
+	req->default_rule = 1;
+	req->append = 1;
+	req->vf = vf + 1;
+	req->op = NIX_RX_ACTION_DEFAULT;
+
+	err = otx2_sync_mbox_msg(&pf->mbox);
+out:
+	mutex_unlock(&pf->mbox.lock);
+	return err;
+}
+
+static int otx2_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
+{
+	struct otx2_nic *pf = netdev_priv(netdev);
+	struct pci_dev *pdev = pf->pdev;
+	struct otx2_vf_config *config;
+	int ret;
+
+	if (!netif_running(netdev))
+		return -EAGAIN;
+
+	if (vf >= pci_num_vf(pdev))
+		return -EINVAL;
+
+	if (!is_valid_ether_addr(mac))
+		return -EINVAL;
+
+	config = &pf->vf_configs[vf];
+	ether_addr_copy(config->mac, mac);
+
+	ret = otx2_do_set_vf_mac(pf, vf, mac);
+	if (ret == 0)
+		dev_info(&pdev->dev, "Reload VF driver to apply the changes\n");
+
+	return ret;
+}
+
+static int otx2_do_set_vf_vlan(struct otx2_nic *pf, int vf, u16 vlan, u8 qos,
+			       __be16 proto)
+{
+	struct otx2_flow_config *flow_cfg = pf->flow_cfg;
+	struct nix_vtag_config_rsp *vtag_rsp;
+	struct npc_delete_flow_req *del_req;
+	struct nix_vtag_config *vtag_req;
+	struct npc_install_flow_req *req;
+	struct otx2_vf_config *config;
+	int err = 0;
+	u32 idx;
+
+	config = &pf->vf_configs[vf];
+
+	if (!vlan && !config->vlan)
+		goto out;
+
+	mutex_lock(&pf->mbox.lock);
+
+	/* free old tx vtag entry */
+	if (config->vlan) {
+		vtag_req = otx2_mbox_alloc_msg_nix_vtag_cfg(&pf->mbox);
+		if (!vtag_req) {
+			err = -ENOMEM;
+			goto out;
+		}
+		vtag_req->cfg_type = 0;
+		vtag_req->tx.free_vtag0 = 1;
+		vtag_req->tx.vtag0_idx = config->tx_vtag_idx;
+
+		err = otx2_sync_mbox_msg(&pf->mbox);
+		if (err)
+			goto out;
+	}
+
+	if (!vlan && config->vlan) {
+		/* rx */
+		del_req = otx2_mbox_alloc_msg_npc_delete_flow(&pf->mbox);
+		if (!del_req) {
+			err = -ENOMEM;
+			goto out;
+		}
+		idx = ((vf * OTX2_PER_VF_VLAN_FLOWS) + OTX2_VF_VLAN_RX_INDEX);
+		del_req->entry =
+			flow_cfg->entry[flow_cfg->vf_vlan_offset + idx];
+		err = otx2_sync_mbox_msg(&pf->mbox);
+		if (err)
+			goto out;
+
+		/* tx */
+		del_req = otx2_mbox_alloc_msg_npc_delete_flow(&pf->mbox);
+		if (!del_req) {
+			err = -ENOMEM;
+			goto out;
+		}
+		idx = ((vf * OTX2_PER_VF_VLAN_FLOWS) + OTX2_VF_VLAN_TX_INDEX);
+		del_req->entry =
+			flow_cfg->entry[flow_cfg->vf_vlan_offset + idx];
+		err = otx2_sync_mbox_msg(&pf->mbox);
+
+		goto out;
+	}
+
+	/* rx */
+	req = otx2_mbox_alloc_msg_npc_install_flow(&pf->mbox);
+	if (!req) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	idx = ((vf * OTX2_PER_VF_VLAN_FLOWS) + OTX2_VF_VLAN_RX_INDEX);
+	req->entry = flow_cfg->entry[flow_cfg->vf_vlan_offset + idx];
+	req->packet.vlan_tci = htons(vlan);
+	req->mask.vlan_tci = htons(VLAN_VID_MASK);
+	/* af fills the destination mac addr */
+	eth_broadcast_addr((u8 *)&req->mask.dmac);
+	req->features = BIT_ULL(NPC_OUTER_VID) | BIT_ULL(NPC_DMAC);
+	req->channel = pf->hw.rx_chan_base;
+	req->intf = NIX_INTF_RX;
+	req->vf = vf + 1;
+	req->op = NIX_RX_ACTION_DEFAULT;
+	req->vtag0_valid = true;
+	req->vtag0_type = NIX_AF_LFX_RX_VTAG_TYPE7;
+	req->set_cntr = 1;
+
+	err = otx2_sync_mbox_msg(&pf->mbox);
+	if (err)
+		goto out;
+
+	/* tx */
+	vtag_req = otx2_mbox_alloc_msg_nix_vtag_cfg(&pf->mbox);
+	if (!vtag_req) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	/* configure tx vtag params */
+	vtag_req->vtag_size = VTAGSIZE_T4;
+	vtag_req->cfg_type = 0; /* tx vlan cfg */
+	vtag_req->tx.cfg_vtag0 = 1;
+	vtag_req->tx.vtag0 = (ntohs(proto) << 16) | vlan;
+
+	err = otx2_sync_mbox_msg(&pf->mbox);
+	if (err)
+		goto out;
+
+	vtag_rsp = (struct nix_vtag_config_rsp *)otx2_mbox_get_rsp
+			(&pf->mbox.mbox, 0, &vtag_req->hdr);
+	if (IS_ERR(vtag_rsp)) {
+		err = PTR_ERR(vtag_rsp);
+		goto out;
+	}
+	config->tx_vtag_idx = vtag_rsp->vtag0_idx;
+
+	req = otx2_mbox_alloc_msg_npc_install_flow(&pf->mbox);
+	if (!req) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	eth_zero_addr((u8 *)&req->mask.dmac);
+	idx = ((vf * OTX2_PER_VF_VLAN_FLOWS) + OTX2_VF_VLAN_TX_INDEX);
+	req->entry = flow_cfg->entry[flow_cfg->vf_vlan_offset + idx];
+	req->features = BIT_ULL(NPC_DMAC);
+	req->channel = pf->hw.tx_chan_base;
+	req->intf = NIX_INTF_TX;
+	req->vf = vf + 1;
+	req->op = NIX_TX_ACTIONOP_UCAST_DEFAULT;
+	req->vtag0_def = vtag_rsp->vtag0_idx;
+	req->vtag0_op = VTAG_INSERT;
+	req->set_cntr = 1;
+
+	err = otx2_sync_mbox_msg(&pf->mbox);
+out:
+	config->vlan = vlan;
+	mutex_unlock(&pf->mbox.lock);
+	return err;
+}
+
+static int otx2_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos,
+			    __be16 proto)
+{
+	struct otx2_nic *pf = netdev_priv(netdev);
+	struct pci_dev *pdev = pf->pdev;
+
+	if (!netif_running(netdev))
+		return -EAGAIN;
+
+	if (vf >= pci_num_vf(pdev))
+		return -EINVAL;
+
+	/* qos is currently unsupported */
+	if (vlan >= VLAN_N_VID || qos)
+		return -EINVAL;
+
+	if (proto != htons(ETH_P_8021Q))
+		return -EPROTONOSUPPORT;
+
+	if (!(pf->flags & OTX2_FLAG_VF_VLAN_SUPPORT))
+		return -EOPNOTSUPP;
+
+	return otx2_do_set_vf_vlan(pf, vf, vlan, qos, proto);
+}
+
+static int otx2_get_vf_config(struct net_device *netdev, int vf,
+			      struct ifla_vf_info *ivi)
+{
+	struct otx2_nic *pf = netdev_priv(netdev);
+	struct pci_dev *pdev = pf->pdev;
+	struct otx2_vf_config *config;
+
+	if (!netif_running(netdev))
+		return -EAGAIN;
+
+	if (vf >= pci_num_vf(pdev))
+		return -EINVAL;
+
+	config = &pf->vf_configs[vf];
+	ivi->vf = vf;
+	ether_addr_copy(ivi->mac, config->mac);
+	ivi->vlan = config->vlan;
+
+	return 0;
+}
+
 static const struct net_device_ops otx2_netdev_ops = {
 	.ndo_open		= otx2_open,
 	.ndo_stop		= otx2_stop,
@@ -1939,6 +2180,9 @@ static const struct net_device_ops otx2_netdev_ops = {
 	.ndo_tx_timeout		= otx2_tx_timeout,
 	.ndo_get_stats64	= otx2_get_stats64,
 	.ndo_do_ioctl		= otx2_ioctl,
+	.ndo_set_vf_mac		= otx2_set_vf_mac,
+	.ndo_set_vf_vlan	= otx2_set_vf_vlan,
+	.ndo_get_vf_config	= otx2_get_vf_config,
 };
 
 static int otx2_wq_init(struct otx2_nic *pf)
@@ -2331,6 +2575,8 @@ static void otx2_remove(struct pci_dev *pdev)
 
 	pf = netdev_priv(netdev);
 
+	pf->flags |= OTX2_FLAG_PF_SHUTDOWN;
+
 	if (pf->flags & OTX2_FLAG_TX_TSTAMP_ENABLED)
 		otx2_config_hw_tx_tstamp(pf, false);
 	if (pf->flags & OTX2_FLAG_RX_TSTAMP_ENABLED)