[PATCH net-next 0/2]cxgb4/cxgb4vf: VF link state support

[PATCH net-next 0/2]cxgb4/cxgb4vf: VF link state support

[Arjun Vynipadath]

This series of patches adds support for ndo_set_vf_link_state in
cxgb4 driver.

Patch 1 implements ndo_set_vf_link_state
Patch 2 reverts the existing force_link_up behaviour for cxgb4vf driver.

Arjun Vynipadath (2):
  cxgb4: Add VF Link state support
  cxgb4vf: Revert force link up behaviour

 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h         |  1 +
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c    | 57 +++++++++++++++++++---
 drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h      | 10 ++++
 .../net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c    | 13 ++---
 4 files changed, 65 insertions(+), 16 deletions(-)

-- 
2.9.5

[PATCH net-next 1/2] cxgb4: Add VF Link state support

[Arjun Vynipadath]

Use ndo_set_vf_link_state to control the link states associated
with the virtual interfaces.

Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Vishal Kulkarni <vishal@chelsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h      |  1 +
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 57 ++++++++++++++++++++++---
 drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h   |  8 ++++
 3 files changed, 60 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index b7b0eb104430..dd6379809c74 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -885,6 +885,7 @@ struct vf_info {
 	unsigned int tx_rate;
 	bool pf_set_mac;
 	u16 vlan;
+	int link_state;
 };
 
 enum {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index bcbac247a73d..4eda5285c867 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -2740,6 +2740,7 @@ static int cxgb4_mgmt_get_vf_config(struct net_device *dev,
 	ivi->min_tx_rate = 0;
 	ether_addr_copy(ivi->mac, vfinfo->vf_mac_addr);
 	ivi->vlan = vfinfo->vlan;
+	ivi->linkstate = vfinfo->link_state;
 	return 0;
 }
 
@@ -2879,6 +2880,49 @@ static int cxgb4_mgmt_set_vf_vlan(struct net_device *dev, int vf,
 		ret, (vlan ? "setting" : "clearing"), adap->pf, vf);
 	return ret;
 }
+
+static int cxgb4_mgmt_set_vf_link_state(struct net_device *dev, int vf,
+					int link)
+{
+	struct port_info *pi = netdev_priv(dev);
+	struct adapter *adap = pi->adapter;
+	int ret = 0;
+	u32 param, val;
+
+	if (vf >= adap->num_vfs)
+		return -EINVAL;
+
+	switch (link) {
+	case IFLA_VF_LINK_STATE_AUTO:
+		val = VF_LINK_STATE_AUTO;
+		break;
+
+	case IFLA_VF_LINK_STATE_ENABLE:
+		val = VF_LINK_STATE_ENABLE;
+		break;
+
+	case IFLA_VF_LINK_STATE_DISABLE:
+		val = VF_LINK_STATE_DISABLE;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_PFVF) |
+		 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_PFVF_LINK_STATE));
+	ret = t4_set_params(adap, adap->mbox, adap->pf, vf + 1, 1,
+			    &param, &val);
+	if (ret) {
+		dev_err(adap->pdev_dev,
+			"Error %d in setting PF %d VF %d link state\n",
+			ret, adap->pf, vf);
+		return -EINVAL;
+	}
+
+	adap->vfinfo[vf].link_state = link;
+	return ret;
+}
 #endif /* CONFIG_PCI_IOV */
 
 static int cxgb_set_mac_addr(struct net_device *dev, void *p)
@@ -3294,12 +3338,13 @@ static const struct net_device_ops cxgb4_netdev_ops = {
 
 #ifdef CONFIG_PCI_IOV
 static const struct net_device_ops cxgb4_mgmt_netdev_ops = {
-	.ndo_open             = cxgb4_mgmt_open,
-	.ndo_set_vf_mac       = cxgb4_mgmt_set_vf_mac,
-	.ndo_get_vf_config    = cxgb4_mgmt_get_vf_config,
-	.ndo_set_vf_rate      = cxgb4_mgmt_set_vf_rate,
-	.ndo_get_phys_port_id = cxgb4_mgmt_get_phys_port_id,
-	.ndo_set_vf_vlan      = cxgb4_mgmt_set_vf_vlan,
+	.ndo_open               = cxgb4_mgmt_open,
+	.ndo_set_vf_mac         = cxgb4_mgmt_set_vf_mac,
+	.ndo_get_vf_config      = cxgb4_mgmt_get_vf_config,
+	.ndo_set_vf_rate        = cxgb4_mgmt_set_vf_rate,
+	.ndo_get_phys_port_id   = cxgb4_mgmt_get_phys_port_id,
+	.ndo_set_vf_vlan        = cxgb4_mgmt_set_vf_vlan,
+	.ndo_set_vf_link_state	= cxgb4_mgmt_set_vf_link_state,
 };
 #endif
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index 631f1663f4e0..9a3bab797760 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -1312,6 +1312,14 @@ enum fw_params_param_pfvf {
 	FW_PARAMS_PARAM_PFVF_RAWF_END = 0x37,
 	FW_PARAMS_PARAM_PFVF_NCRYPTO_LOOKASIDE = 0x39,
 	FW_PARAMS_PARAM_PFVF_PORT_CAPS32 = 0x3A,
+	FW_PARAMS_PARAM_PFVF_LINK_STATE = 0x40,
+};
+
+/* Virtual link state as seen by the specified VF */
+enum vf_link_states {
+	VF_LINK_STATE_AUTO		= 0x00,
+	VF_LINK_STATE_ENABLE		= 0x01,
+	VF_LINK_STATE_DISABLE		= 0x02,
 };
 
 /*
-- 
2.9.5

[PATCH net-next 2/2] cxgb4vf: Revert force link up behaviour

[Arjun Vynipadath]

Reverting force link up changes since this behaviour can be
achieved using VF link state feature.

Reverts:
commit 0913667ab3ad ("cxgb4vf: Forcefully link up virtual interfaces")

Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Vishal Kulkarni <vishal@chelsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index 3300b69a42b3..ed888227d81d 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -155,6 +155,8 @@ void t4vf_os_link_changed(struct adapter *adapter, int pidx, int link_ok)
 		const char *fc;
 		const struct port_info *pi = netdev_priv(dev);
 
+		netif_carrier_on(dev);
+
 		switch (pi->link_cfg.speed) {
 		case 100:
 			s = "100Mbps";
@@ -200,6 +202,7 @@ void t4vf_os_link_changed(struct adapter *adapter, int pidx, int link_ok)
 
 		netdev_info(dev, "link up, %s, full-duplex, %s PAUSE\n", s, fc);
 	} else {
+		netif_carrier_off(dev);
 		netdev_info(dev, "link down\n");
 	}
 }
@@ -339,16 +342,6 @@ static int link_start(struct net_device *dev)
 	if (ret == 0)
 		ret = t4vf_enable_pi(pi->adapter, pi, true, true);
 
-	/* The Virtual Interfaces are connected to an internal switch on the
-	 * chip which allows VIs attached to the same port to talk to each
-	 * other even when the port link is down.  As a result, we generally
-	 * want to always report a VI's link as being "up", provided there are
-	 * no errors in enabling vi.
-	 */
-
-	if (ret == 0)
-		netif_carrier_on(dev);
-
 	return ret;
 }
 
-- 
2.9.5

Re: [PATCH net-next 1/2] cxgb4: Add VF Link state support

[David Miller]

From: Arjun Vynipadath <arjun@chelsio.com>
Date: Thu, 28 Feb 2019 16:16:26 +0530

> @@ -2879,6 +2880,49 @@ static int cxgb4_mgmt_set_vf_vlan(struct net_device *dev, int vf,
>  		ret, (vlan ? "setting" : "clearing"), adap->pf, vf);
>  	return ret;
>  }
> +
> +static int cxgb4_mgmt_set_vf_link_state(struct net_device *dev, int vf,
> +					int link)
> +{
> +	struct port_info *pi = netdev_priv(dev);
> +	struct adapter *adap = pi->adapter;
> +	int ret = 0;
> +	u32 param, val;

Reverse christmas tree please.