Merge branch 'sfc-set-mac'

Shradha Shah says:

====================
sfc: compat for lack of VADAPTOR_SET_MAC in adaptor_firmware <= 4.1.1.1023

This patch series resolves an incompatibility with legacy
firmware due to the lack of MC_CMD_VADAPTOR_SET_MAC in
adaptor_firmware <= 4.1.1.1023

Unless this patch series is applied there will be a compatibility
issue between the driver and Solarflare adapters running older
firmware.

Tested with and without CONFIG_SFC_SRIOV
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 151 insertions, 69 deletions

diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 847643455468..605cc8948594 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -101,6 +101,11 @@ static unsigned int efx_ef10_mem_map_size(struct efx_nic *efx)
 	return resource_size(&efx->pci_dev->resource[bar]);
 }
 
+static bool efx_ef10_is_vf(struct efx_nic *efx)
+{
+	return efx->type->is_vf;
+}
+
 static int efx_ef10_get_pf_index(struct efx_nic *efx)
 {
 	MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_FUNCTION_INFO_OUT_LEN);
@@ -677,6 +682,48 @@ static int efx_ef10_probe_pf(struct efx_nic *efx)
 	return efx_ef10_probe(efx);
 }
 
+int efx_ef10_vadaptor_alloc(struct efx_nic *efx, unsigned int port_id)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_ALLOC_IN_LEN);
+
+	MCDI_SET_DWORD(inbuf, VADAPTOR_ALLOC_IN_UPSTREAM_PORT_ID, port_id);
+	return efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_ALLOC, inbuf, sizeof(inbuf),
+			    NULL, 0, NULL);
+}
+
+int efx_ef10_vadaptor_free(struct efx_nic *efx, unsigned int port_id)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_FREE_IN_LEN);
+
+	MCDI_SET_DWORD(inbuf, VADAPTOR_FREE_IN_UPSTREAM_PORT_ID, port_id);
+	return efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_FREE, inbuf, sizeof(inbuf),
+			    NULL, 0, NULL);
+}
+
+int efx_ef10_vport_add_mac(struct efx_nic *efx,
+			   unsigned int port_id, u8 *mac)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_ADD_MAC_ADDRESS_IN_LEN);
+
+	MCDI_SET_DWORD(inbuf, VPORT_ADD_MAC_ADDRESS_IN_VPORT_ID, port_id);
+	ether_addr_copy(MCDI_PTR(inbuf, VPORT_ADD_MAC_ADDRESS_IN_MACADDR), mac);
+
+	return efx_mcdi_rpc(efx, MC_CMD_VPORT_ADD_MAC_ADDRESS, inbuf,
+			    sizeof(inbuf), NULL, 0, NULL);
+}
+
+int efx_ef10_vport_del_mac(struct efx_nic *efx,
+			   unsigned int port_id, u8 *mac)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_DEL_MAC_ADDRESS_IN_LEN);
+
+	MCDI_SET_DWORD(inbuf, VPORT_DEL_MAC_ADDRESS_IN_VPORT_ID, port_id);
+	ether_addr_copy(MCDI_PTR(inbuf, VPORT_DEL_MAC_ADDRESS_IN_MACADDR), mac);
+
+	return efx_mcdi_rpc(efx, MC_CMD_VPORT_DEL_MAC_ADDRESS, inbuf,
+			    sizeof(inbuf), NULL, 0, NULL);
+}
+
 #ifdef CONFIG_SFC_SRIOV
 static int efx_ef10_probe_vf(struct efx_nic *efx)
 {
@@ -3804,6 +3851,72 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
 	WARN_ON(remove_failed);
 }
 
+static int efx_ef10_vport_set_mac_address(struct efx_nic *efx)
+{
+	struct efx_ef10_nic_data *nic_data = efx->nic_data;
+	u8 mac_old[ETH_ALEN];
+	int rc, rc2;
+
+	/* Only reconfigure a PF-created vport */
+	if (is_zero_ether_addr(nic_data->vport_mac))
+		return 0;
+
+	efx_device_detach_sync(efx);
+	efx_net_stop(efx->net_dev);
+	down_write(&efx->filter_sem);
+	efx_ef10_filter_table_remove(efx);
+	up_write(&efx->filter_sem);
+
+	rc = efx_ef10_vadaptor_free(efx, nic_data->vport_id);
+	if (rc)
+		goto restore_filters;
+
+	ether_addr_copy(mac_old, nic_data->vport_mac);
+	rc = efx_ef10_vport_del_mac(efx, nic_data->vport_id,
+				    nic_data->vport_mac);
+	if (rc)
+		goto restore_vadaptor;
+
+	rc = efx_ef10_vport_add_mac(efx, nic_data->vport_id,
+				    efx->net_dev->dev_addr);
+	if (!rc) {
+		ether_addr_copy(nic_data->vport_mac, efx->net_dev->dev_addr);
+	} else {
+		rc2 = efx_ef10_vport_add_mac(efx, nic_data->vport_id, mac_old);
+		if (rc2) {
+			/* Failed to add original MAC, so clear vport_mac */
+			eth_zero_addr(nic_data->vport_mac);
+			goto reset_nic;
+		}
+	}
+
+restore_vadaptor:
+	rc2 = efx_ef10_vadaptor_alloc(efx, nic_data->vport_id);
+	if (rc2)
+		goto reset_nic;
+restore_filters:
+	down_write(&efx->filter_sem);
+	rc2 = efx_ef10_filter_table_probe(efx);
+	up_write(&efx->filter_sem);
+	if (rc2)
+		goto reset_nic;
+
+	rc2 = efx_net_open(efx->net_dev);
+	if (rc2)
+		goto reset_nic;
+
+	netif_device_attach(efx->net_dev);
+
+	return rc;
+
+reset_nic:
+	netif_err(efx, drv, efx->net_dev,
+		  "Failed to restore when changing MAC address - scheduling reset\n");
+	efx_schedule_reset(efx, RESET_TYPE_DATAPATH);
+
+	return rc ? rc : rc2;
+}
+
 static int efx_ef10_set_mac_address(struct efx_nic *efx)
 {
 	MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_SET_MAC_IN_LEN);
@@ -3820,8 +3933,8 @@ static int efx_ef10_set_mac_address(struct efx_nic *efx)
 			efx->net_dev->dev_addr);
 	MCDI_SET_DWORD(inbuf, VADAPTOR_SET_MAC_IN_UPSTREAM_PORT_ID,
 		       nic_data->vport_id);
-	rc = efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_SET_MAC, inbuf,
-			  sizeof(inbuf), NULL, 0, NULL);
+	rc = efx_mcdi_rpc_quiet(efx, MC_CMD_VADAPTOR_SET_MAC, inbuf,
+				sizeof(inbuf), NULL, 0, NULL);
 
 	efx_ef10_filter_table_probe(efx);
 	up_write(&efx->filter_sem);
@@ -3829,38 +3942,27 @@ static int efx_ef10_set_mac_address(struct efx_nic *efx)
 		efx_net_open(efx->net_dev);
 	netif_device_attach(efx->net_dev);
 
-#if !defined(CONFIG_SFC_SRIOV)
-	if (rc == -EPERM)
-		netif_err(efx, drv, efx->net_dev,
-			  "Cannot change MAC address; use sfboot to enable mac-spoofing"
-			  " on this interface\n");
-#else
-	if (rc == -EPERM) {
+#ifdef CONFIG_SFC_SRIOV
+	if (efx->pci_dev->is_virtfn && efx->pci_dev->physfn) {
 		struct pci_dev *pci_dev_pf = efx->pci_dev->physfn;
 
-		/* Switch to PF and change MAC address on vport */
-		if (efx->pci_dev->is_virtfn && pci_dev_pf) {
-			struct efx_nic *efx_pf = pci_get_drvdata(pci_dev_pf);
+		if (rc == -EPERM) {
+			struct efx_nic *efx_pf;
 
-			if (!efx_ef10_sriov_set_vf_mac(efx_pf,
-						       nic_data->vf_index,
-						       efx->net_dev->dev_addr))
-				return 0;
-		}
-		netif_err(efx, drv, efx->net_dev,
-			  "Cannot change MAC address; use sfboot to enable mac-spoofing"
-			  " on this interface\n");
-	} else if (efx->pci_dev->is_virtfn) {
-		/* Successfully changed by VF (with MAC spoofing), so update the
-		 * parent PF if possible.
-		 */
-		struct pci_dev *pci_dev_pf = efx->pci_dev->physfn;
+			/* Switch to PF and change MAC address on vport */
+			efx_pf = pci_get_drvdata(pci_dev_pf);
 
-		if (pci_dev_pf) {
+			rc = efx_ef10_sriov_set_vf_mac(efx_pf,
+						       nic_data->vf_index,
+						       efx->net_dev->dev_addr);
+		} else if (!rc) {
 			struct efx_nic *efx_pf = pci_get_drvdata(pci_dev_pf);
 			struct efx_ef10_nic_data *nic_data = efx_pf->nic_data;
 			unsigned int i;
 
+			/* MAC address successfully changed by VF (with MAC
+			 * spoofing) so update the parent PF if possible.
+			 */
 			for (i = 0; i < efx_pf->vf_count; ++i) {
 				struct ef10_vf *vf = nic_data->vf + i;
 
@@ -3871,8 +3973,24 @@ static int efx_ef10_set_mac_address(struct efx_nic *efx)
 				}
 			}
 		}
-	}
+	} else
 #endif
+	if (rc == -EPERM) {
+		netif_err(efx, drv, efx->net_dev,
+			  "Cannot change MAC address; use sfboot to enable"
+			  " mac-spoofing on this interface\n");
+	} else if (rc == -ENOSYS && !efx_ef10_is_vf(efx)) {
+		/* If the active MCFW does not support MC_CMD_VADAPTOR_SET_MAC
+		 * fall-back to the method of changing the MAC address on the
+		 * vport.  This only applies to PFs because such versions of
+		 * MCFW do not support VFs.
+		 */
+		rc = efx_ef10_vport_set_mac_address(efx);
+	} else {
+		efx_mcdi_display_error(efx, MC_CMD_VADAPTOR_SET_MAC,
+				       sizeof(inbuf), NULL, 0, rc);
+	}
+
 	return rc;
 }
 
diff --git a/drivers/net/ethernet/sfc/ef10_sriov.c b/drivers/net/ethernet/sfc/ef10_sriov.c
index 6c9b6e45509a..7485f71b4e2f 100644
--- a/drivers/net/ethernet/sfc/ef10_sriov.c
+++ b/drivers/net/ethernet/sfc/ef10_sriov.c
@@ -29,30 +29,6 @@ static int efx_ef10_evb_port_assign(struct efx_nic *efx, unsigned int port_id,
 			    NULL, 0, NULL);
 }
 
-static int efx_ef10_vport_add_mac(struct efx_nic *efx,
-				  unsigned int port_id, u8 *mac)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_ADD_MAC_ADDRESS_IN_LEN);
-
-	MCDI_SET_DWORD(inbuf, VPORT_ADD_MAC_ADDRESS_IN_VPORT_ID, port_id);
-	ether_addr_copy(MCDI_PTR(inbuf, VPORT_ADD_MAC_ADDRESS_IN_MACADDR), mac);
-
-	return efx_mcdi_rpc(efx, MC_CMD_VPORT_ADD_MAC_ADDRESS, inbuf,
-			    sizeof(inbuf), NULL, 0, NULL);
-}
-
-static int efx_ef10_vport_del_mac(struct efx_nic *efx,
-				  unsigned int port_id, u8 *mac)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_DEL_MAC_ADDRESS_IN_LEN);
-
-	MCDI_SET_DWORD(inbuf, VPORT_DEL_MAC_ADDRESS_IN_VPORT_ID, port_id);
-	ether_addr_copy(MCDI_PTR(inbuf, VPORT_DEL_MAC_ADDRESS_IN_MACADDR), mac);
-
-	return efx_mcdi_rpc(efx, MC_CMD_VPORT_DEL_MAC_ADDRESS, inbuf,
-			    sizeof(inbuf), NULL, 0, NULL);
-}
-
 static int efx_ef10_vswitch_alloc(struct efx_nic *efx, unsigned int port_id,
 				  unsigned int vswitch_type)
 {
@@ -136,24 +112,6 @@ static int efx_ef10_vport_free(struct efx_nic *efx, unsigned int port_id)
 			    NULL, 0, NULL);
 }
 
-static int efx_ef10_vadaptor_alloc(struct efx_nic *efx, unsigned int port_id)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_ALLOC_IN_LEN);
-
-	MCDI_SET_DWORD(inbuf, VADAPTOR_ALLOC_IN_UPSTREAM_PORT_ID, port_id);
-	return efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_ALLOC, inbuf, sizeof(inbuf),
-			    NULL, 0, NULL);
-}
-
-static int efx_ef10_vadaptor_free(struct efx_nic *efx, unsigned int port_id)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_FREE_IN_LEN);
-
-	MCDI_SET_DWORD(inbuf, VADAPTOR_FREE_IN_UPSTREAM_PORT_ID, port_id);
-	return efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_FREE, inbuf, sizeof(inbuf),
-			    NULL, 0, NULL);
-}
-
 static void efx_ef10_sriov_free_vf_vports(struct efx_nic *efx)
 {
 	struct efx_ef10_nic_data *nic_data = efx->nic_data;
diff --git a/drivers/net/ethernet/sfc/ef10_sriov.h b/drivers/net/ethernet/sfc/ef10_sriov.h
index db4ef537c610..6d25b92cb45e 100644
--- a/drivers/net/ethernet/sfc/ef10_sriov.h
+++ b/drivers/net/ethernet/sfc/ef10_sriov.h
@@ -65,5 +65,11 @@ int efx_ef10_vswitching_restore_pf(struct efx_nic *efx);
 int efx_ef10_vswitching_restore_vf(struct efx_nic *efx);
 void efx_ef10_vswitching_remove_pf(struct efx_nic *efx);
 void efx_ef10_vswitching_remove_vf(struct efx_nic *efx);
+int efx_ef10_vport_add_mac(struct efx_nic *efx,
+			   unsigned int port_id, u8 *mac);
+int efx_ef10_vport_del_mac(struct efx_nic *efx,
+			   unsigned int port_id, u8 *mac);
+int efx_ef10_vadaptor_alloc(struct efx_nic *efx, unsigned int port_id);
+int efx_ef10_vadaptor_free(struct efx_nic *efx, unsigned int port_id);
 
 #endif /* EF10_SRIOV_H */