Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
40GbE Intel Wired LAN Driver Updates 2021-12-17

Brett Creeley says:

This patch series adds support in the iavf driver for communicating and
using VIRTCHNL_VF_OFFLOAD_VLAN_V2. The current VIRTCHNL_VF_OFFLOAD_VLAN
is very limited and covers all 802.1Q VLAN offloads and filtering with
no granularity.

The new VIRTCHNL_VF_OFFLOAD_VLAN_V2 adds more granularity, flexibility,
and support for 802.1ad offloads and filtering. This includes the VF
negotiating which VLAN offloads/filtering it's allowed, where VLAN tags
should be inserted and/or stripped into and from descriptors, and the
supported VLAN protocols.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/iavf/iavf.h

@@ -55,7 +55,8 @@ enum iavf_vsi_state_t {
 struct iavf_vsi {
 	struct iavf_adapter *back;
 	struct net_device *netdev;
-	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+	unsigned long active_cvlans[BITS_TO_LONGS(VLAN_N_VID)];
+	unsigned long active_svlans[BITS_TO_LONGS(VLAN_N_VID)];
 	u16 seid;
 	u16 id;
 	DECLARE_BITMAP(state, __IAVF_VSI_STATE_SIZE__);
@@ -146,9 +147,15 @@ struct iavf_mac_filter {
 	};
 };
 
+#define IAVF_VLAN(vid, tpid) ((struct iavf_vlan){ vid, tpid })
+struct iavf_vlan {
+	u16 vid;
+	u16 tpid;
+};
+
 struct iavf_vlan_filter {
 	struct list_head list;
-	u16 vlan;
+	struct iavf_vlan vlan;
 	bool remove;		/* filter needs to be removed */
 	bool add;		/* filter needs to be added */
 };
@@ -181,6 +188,8 @@ enum iavf_state_t {
 	__IAVF_REMOVE,		/* driver is being unloaded */
 	__IAVF_INIT_VERSION_CHECK,	/* aq msg sent, awaiting reply */
 	__IAVF_INIT_GET_RESOURCES,	/* aq msg sent, awaiting reply */
+	__IAVF_INIT_GET_OFFLOAD_VLAN_V2_CAPS,
+	__IAVF_INIT_CONFIG_ADAPTER,
 	__IAVF_INIT_SW,		/* got resources, setting up structs */
 	__IAVF_INIT_FAILED,	/* init failed, restarting procedure */
 	__IAVF_RESETTING,		/* in reset */
@@ -278,38 +287,47 @@ struct iavf_adapter {
 /* duplicates for common code */
 #define IAVF_FLAG_DCB_ENABLED			0
 	/* flags for admin queue service task */
-	u32 aq_required;
-#define IAVF_FLAG_AQ_ENABLE_QUEUES		BIT(0)
-#define IAVF_FLAG_AQ_DISABLE_QUEUES		BIT(1)
-#define IAVF_FLAG_AQ_ADD_MAC_FILTER		BIT(2)
-#define IAVF_FLAG_AQ_ADD_VLAN_FILTER		BIT(3)
-#define IAVF_FLAG_AQ_DEL_MAC_FILTER		BIT(4)
-#define IAVF_FLAG_AQ_DEL_VLAN_FILTER		BIT(5)
-#define IAVF_FLAG_AQ_CONFIGURE_QUEUES		BIT(6)
-#define IAVF_FLAG_AQ_MAP_VECTORS		BIT(7)
-#define IAVF_FLAG_AQ_HANDLE_RESET		BIT(8)
-#define IAVF_FLAG_AQ_CONFIGURE_RSS		BIT(9) /* direct AQ config */
-#define IAVF_FLAG_AQ_GET_CONFIG		BIT(10)
+	u64 aq_required;
+#define IAVF_FLAG_AQ_ENABLE_QUEUES		BIT_ULL(0)
+#define IAVF_FLAG_AQ_DISABLE_QUEUES		BIT_ULL(1)
+#define IAVF_FLAG_AQ_ADD_MAC_FILTER		BIT_ULL(2)
+#define IAVF_FLAG_AQ_ADD_VLAN_FILTER		BIT_ULL(3)
+#define IAVF_FLAG_AQ_DEL_MAC_FILTER		BIT_ULL(4)
+#define IAVF_FLAG_AQ_DEL_VLAN_FILTER		BIT_ULL(5)
+#define IAVF_FLAG_AQ_CONFIGURE_QUEUES		BIT_ULL(6)
+#define IAVF_FLAG_AQ_MAP_VECTORS		BIT_ULL(7)
+#define IAVF_FLAG_AQ_HANDLE_RESET		BIT_ULL(8)
+#define IAVF_FLAG_AQ_CONFIGURE_RSS		BIT_ULL(9) /* direct AQ config */
+#define IAVF_FLAG_AQ_GET_CONFIG			BIT_ULL(10)
 /* Newer style, RSS done by the PF so we can ignore hardware vagaries. */
-#define IAVF_FLAG_AQ_GET_HENA			BIT(11)
-#define IAVF_FLAG_AQ_SET_HENA			BIT(12)
-#define IAVF_FLAG_AQ_SET_RSS_KEY		BIT(13)
-#define IAVF_FLAG_AQ_SET_RSS_LUT		BIT(14)
-#define IAVF_FLAG_AQ_REQUEST_PROMISC		BIT(15)
-#define IAVF_FLAG_AQ_RELEASE_PROMISC		BIT(16)
-#define IAVF_FLAG_AQ_REQUEST_ALLMULTI		BIT(17)
-#define IAVF_FLAG_AQ_RELEASE_ALLMULTI		BIT(18)
-#define IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING	BIT(19)
-#define IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING	BIT(20)
-#define IAVF_FLAG_AQ_ENABLE_CHANNELS		BIT(21)
-#define IAVF_FLAG_AQ_DISABLE_CHANNELS		BIT(22)
-#define IAVF_FLAG_AQ_ADD_CLOUD_FILTER		BIT(23)
-#define IAVF_FLAG_AQ_DEL_CLOUD_FILTER		BIT(24)
-#define IAVF_FLAG_AQ_ADD_FDIR_FILTER		BIT(25)
-#define IAVF_FLAG_AQ_DEL_FDIR_FILTER		BIT(26)
-#define IAVF_FLAG_AQ_ADD_ADV_RSS_CFG		BIT(27)
-#define IAVF_FLAG_AQ_DEL_ADV_RSS_CFG		BIT(28)
-#define IAVF_FLAG_AQ_REQUEST_STATS		BIT(29)
+#define IAVF_FLAG_AQ_GET_HENA			BIT_ULL(11)
+#define IAVF_FLAG_AQ_SET_HENA			BIT_ULL(12)
+#define IAVF_FLAG_AQ_SET_RSS_KEY		BIT_ULL(13)
+#define IAVF_FLAG_AQ_SET_RSS_LUT		BIT_ULL(14)
+#define IAVF_FLAG_AQ_REQUEST_PROMISC		BIT_ULL(15)
+#define IAVF_FLAG_AQ_RELEASE_PROMISC		BIT_ULL(16)
+#define IAVF_FLAG_AQ_REQUEST_ALLMULTI		BIT_ULL(17)
+#define IAVF_FLAG_AQ_RELEASE_ALLMULTI		BIT_ULL(18)
+#define IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING	BIT_ULL(19)
+#define IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING	BIT_ULL(20)
+#define IAVF_FLAG_AQ_ENABLE_CHANNELS		BIT_ULL(21)
+#define IAVF_FLAG_AQ_DISABLE_CHANNELS		BIT_ULL(22)
+#define IAVF_FLAG_AQ_ADD_CLOUD_FILTER		BIT_ULL(23)
+#define IAVF_FLAG_AQ_DEL_CLOUD_FILTER		BIT_ULL(24)
+#define IAVF_FLAG_AQ_ADD_FDIR_FILTER		BIT_ULL(25)
+#define IAVF_FLAG_AQ_DEL_FDIR_FILTER		BIT_ULL(26)
+#define IAVF_FLAG_AQ_ADD_ADV_RSS_CFG		BIT_ULL(27)
+#define IAVF_FLAG_AQ_DEL_ADV_RSS_CFG		BIT_ULL(28)
+#define IAVF_FLAG_AQ_REQUEST_STATS		BIT_ULL(29)
+#define IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS	BIT_ULL(30)
+#define IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_STRIPPING		BIT_ULL(31)
+#define IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_STRIPPING	BIT_ULL(32)
+#define IAVF_FLAG_AQ_ENABLE_STAG_VLAN_STRIPPING		BIT_ULL(33)
+#define IAVF_FLAG_AQ_DISABLE_STAG_VLAN_STRIPPING	BIT_ULL(34)
+#define IAVF_FLAG_AQ_ENABLE_CTAG_VLAN_INSERTION		BIT_ULL(35)
+#define IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_INSERTION	BIT_ULL(36)
+#define IAVF_FLAG_AQ_ENABLE_STAG_VLAN_INSERTION		BIT_ULL(37)
+#define IAVF_FLAG_AQ_DISABLE_STAG_VLAN_INSERTION	BIT_ULL(38)
 
 	/* OS defined structs */
 	struct net_device *netdev;
@@ -349,6 +367,14 @@ struct iavf_adapter {
 			VIRTCHNL_VF_OFFLOAD_RSS_PF)))
 #define VLAN_ALLOWED(_a) ((_a)->vf_res->vf_cap_flags & \
 			  VIRTCHNL_VF_OFFLOAD_VLAN)
+#define VLAN_V2_ALLOWED(_a) ((_a)->vf_res->vf_cap_flags & \
+			     VIRTCHNL_VF_OFFLOAD_VLAN_V2)
+#define VLAN_V2_FILTERING_ALLOWED(_a) \
+	(VLAN_V2_ALLOWED((_a)) && \
+	 ((_a)->vlan_v2_caps.filtering.filtering_support.outer || \
+	  (_a)->vlan_v2_caps.filtering.filtering_support.inner))
+#define VLAN_FILTERING_ALLOWED(_a) \
+	(VLAN_ALLOWED((_a)) || VLAN_V2_FILTERING_ALLOWED((_a)))
 #define ADV_LINK_SUPPORT(_a) ((_a)->vf_res->vf_cap_flags & \
 			      VIRTCHNL_VF_CAP_ADV_LINK_SPEED)
 #define FDIR_FLTR_SUPPORT(_a) ((_a)->vf_res->vf_cap_flags & \
@@ -360,6 +386,7 @@ struct iavf_adapter {
 	struct virtchnl_version_info pf_version;
 #define PF_IS_V11(_a) (((_a)->pf_version.major == 1) && \
 		       ((_a)->pf_version.minor == 1))
+	struct virtchnl_vlan_caps vlan_v2_caps;
 	u16 msg_enable;
 	struct iavf_eth_stats current_stats;
 	struct iavf_vsi vsi;
@@ -448,6 +475,7 @@ static inline void iavf_change_state(struct iavf_adapter *adapter,
 int iavf_up(struct iavf_adapter *adapter);
 void iavf_down(struct iavf_adapter *adapter);
 int iavf_process_config(struct iavf_adapter *adapter);
+int iavf_parse_vf_resource_msg(struct iavf_adapter *adapter);
 void iavf_schedule_reset(struct iavf_adapter *adapter);
 void iavf_schedule_request_stats(struct iavf_adapter *adapter);
 void iavf_reset(struct iavf_adapter *adapter);
@@ -466,6 +494,9 @@ int iavf_send_api_ver(struct iavf_adapter *adapter);
 int iavf_verify_api_ver(struct iavf_adapter *adapter);
 int iavf_send_vf_config_msg(struct iavf_adapter *adapter);
 int iavf_get_vf_config(struct iavf_adapter *adapter);
+int iavf_get_vf_vlan_v2_caps(struct iavf_adapter *adapter);
+int iavf_send_vf_offload_vlan_v2_msg(struct iavf_adapter *adapter);
+void iavf_set_queue_vlan_tag_loc(struct iavf_adapter *adapter);
 void iavf_irq_enable(struct iavf_adapter *adapter, bool flush);
 void iavf_configure_queues(struct iavf_adapter *adapter);
 void iavf_deconfigure_queues(struct iavf_adapter *adapter);
@@ -501,6 +532,14 @@ void iavf_enable_channels(struct iavf_adapter *adapter);
 void iavf_disable_channels(struct iavf_adapter *adapter);
 void iavf_add_cloud_filter(struct iavf_adapter *adapter);
 void iavf_del_cloud_filter(struct iavf_adapter *adapter);
+void iavf_enable_vlan_stripping_v2(struct iavf_adapter *adapter, u16 tpid);
+void iavf_disable_vlan_stripping_v2(struct iavf_adapter *adapter, u16 tpid);
+void iavf_enable_vlan_insertion_v2(struct iavf_adapter *adapter, u16 tpid);
+void iavf_disable_vlan_insertion_v2(struct iavf_adapter *adapter, u16 tpid);
+void
+iavf_set_vlan_offload_features(struct iavf_adapter *adapter,
+			       netdev_features_t prev_features,
+			       netdev_features_t features);
 void iavf_add_fdir_filter(struct iavf_adapter *adapter);
 void iavf_del_fdir_filter(struct iavf_adapter *adapter);
 void iavf_add_adv_rss_cfg(struct iavf_adapter *adapter);

drivers/net/ethernet/intel/iavf/iavf_txrx.c

@@ -865,6 +865,9 @@ static void iavf_receive_skb(struct iavf_ring *rx_ring,
 	if ((rx_ring->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
 	    (vlan_tag & VLAN_VID_MASK))
 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
+	else if ((rx_ring->netdev->features & NETIF_F_HW_VLAN_STAG_RX) &&
+		 vlan_tag & VLAN_VID_MASK)
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021AD), vlan_tag);
 
 	napi_gro_receive(&q_vector->napi, skb);
 }
@@ -1468,7 +1471,7 @@ static int iavf_clean_rx_irq(struct iavf_ring *rx_ring, int budget)
 		struct iavf_rx_buffer *rx_buffer;
 		union iavf_rx_desc *rx_desc;
 		unsigned int size;
-		u16 vlan_tag;
+		u16 vlan_tag = 0;
 		u8 rx_ptype;
 		u64 qword;
 
@@ -1551,9 +1554,13 @@ static int iavf_clean_rx_irq(struct iavf_ring *rx_ring, int budget)
 		/* populate checksum, VLAN, and protocol */
 		iavf_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype);
 
-
-		vlan_tag = (qword & BIT(IAVF_RX_DESC_STATUS_L2TAG1P_SHIFT)) ?
-			   le16_to_cpu(rx_desc->wb.qword0.lo_dword.l2tag1) : 0;
+		if (qword & BIT(IAVF_RX_DESC_STATUS_L2TAG1P_SHIFT) &&
+		    rx_ring->flags & IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1)
+			vlan_tag = le16_to_cpu(rx_desc->wb.qword0.lo_dword.l2tag1);
+		if (rx_desc->wb.qword2.ext_status &
+		    cpu_to_le16(BIT(IAVF_RX_DESC_EXT_STATUS_L2TAG2P_SHIFT)) &&
+		    rx_ring->flags & IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2)
+			vlan_tag = le16_to_cpu(rx_desc->wb.qword2.l2tag2_2);
 
 		iavf_trace(clean_rx_irq_rx, rx_ring, rx_desc, skb);
 		iavf_receive_skb(rx_ring, skb, vlan_tag);
@@ -1781,46 +1788,29 @@ int iavf_napi_poll(struct napi_struct *napi, int budget)
  * Returns error code indicate the frame should be dropped upon error and the
  * otherwise  returns 0 to indicate the flags has been set properly.
  **/
-static inline int iavf_tx_prepare_vlan_flags(struct sk_buff *skb,
-					     struct iavf_ring *tx_ring,
-					     u32 *flags)
+static void iavf_tx_prepare_vlan_flags(struct sk_buff *skb,
+				       struct iavf_ring *tx_ring, u32 *flags)
 {
-	__be16 protocol = skb->protocol;
 	u32  tx_flags = 0;
 
-	if (protocol == htons(ETH_P_8021Q) &&
-	    !(tx_ring->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)) {
-		/* When HW VLAN acceleration is turned off by the user the
-		 * stack sets the protocol to 8021q so that the driver
-		 * can take any steps required to support the SW only
-		 * VLAN handling.  In our case the driver doesn't need
-		 * to take any further steps so just set the protocol
-		 * to the encapsulated ethertype.
-		 */
-		skb->protocol = vlan_get_protocol(skb);
-		goto out;
-	}
 
-	/* if we have a HW VLAN tag being added, default to the HW one */
-	if (skb_vlan_tag_present(skb)) {
-		tx_flags |= skb_vlan_tag_get(skb) << IAVF_TX_FLAGS_VLAN_SHIFT;
-		tx_flags |= IAVF_TX_FLAGS_HW_VLAN;
-	/* else if it is a SW VLAN, check the next protocol and store the tag */
-	} else if (protocol == htons(ETH_P_8021Q)) {
-		struct vlan_hdr *vhdr, _vhdr;
-
-		vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
-		if (!vhdr)
-			return -EINVAL;
+	/* stack will only request hardware VLAN insertion offload for protocols
+	 * that the driver supports and has enabled
+	 */
+	if (!skb_vlan_tag_present(skb))
+		return;
 
-		protocol = vhdr->h_vlan_encapsulated_proto;
-		tx_flags |= ntohs(vhdr->h_vlan_TCI) << IAVF_TX_FLAGS_VLAN_SHIFT;
-		tx_flags |= IAVF_TX_FLAGS_SW_VLAN;
+	tx_flags |= skb_vlan_tag_get(skb) << IAVF_TX_FLAGS_VLAN_SHIFT;
+	if (tx_ring->flags & IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2) {
+		tx_flags |= IAVF_TX_FLAGS_HW_OUTER_SINGLE_VLAN;
+	} else if (tx_ring->flags & IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1) {
+		tx_flags |= IAVF_TX_FLAGS_HW_VLAN;
+	} else {
+		dev_dbg(tx_ring->dev, "Unsupported Tx VLAN tag location requested\n");
+		return;
 	}
 
-out:
 	*flags = tx_flags;
-	return 0;
 }
 
 /**
@@ -2440,8 +2430,13 @@ static netdev_tx_t iavf_xmit_frame_ring(struct sk_buff *skb,
 	first->gso_segs = 1;
 
 	/* prepare the xmit flags */
-	if (iavf_tx_prepare_vlan_flags(skb, tx_ring, &tx_flags))
-		goto out_drop;
+	iavf_tx_prepare_vlan_flags(skb, tx_ring, &tx_flags);
+	if (tx_flags & IAVF_TX_FLAGS_HW_OUTER_SINGLE_VLAN) {
+		cd_type_cmd_tso_mss |= IAVF_TX_CTX_DESC_IL2TAG2 <<
+			IAVF_TXD_CTX_QW1_CMD_SHIFT;
+		cd_l2tag2 = (tx_flags & IAVF_TX_FLAGS_VLAN_MASK) >>
+			IAVF_TX_FLAGS_VLAN_SHIFT;
+	}
 
 	/* obtain protocol of skb */
 	protocol = vlan_get_protocol(skb);

drivers/net/ethernet/intel/iavf/iavf_txrx.h

@@ -243,19 +243,20 @@ static inline unsigned int iavf_txd_use_count(unsigned int size)
 #define DESC_NEEDED (MAX_SKB_FRAGS + 6)
 #define IAVF_MIN_DESC_PENDING	4
 
-#define IAVF_TX_FLAGS_HW_VLAN		BIT(1)
-#define IAVF_TX_FLAGS_SW_VLAN		BIT(2)
-#define IAVF_TX_FLAGS_TSO		BIT(3)
-#define IAVF_TX_FLAGS_IPV4		BIT(4)
-#define IAVF_TX_FLAGS_IPV6		BIT(5)
-#define IAVF_TX_FLAGS_FCCRC		BIT(6)
-#define IAVF_TX_FLAGS_FSO		BIT(7)
-#define IAVF_TX_FLAGS_FD_SB		BIT(9)
-#define IAVF_TX_FLAGS_VXLAN_TUNNEL	BIT(10)
-#define IAVF_TX_FLAGS_VLAN_MASK		0xffff0000
-#define IAVF_TX_FLAGS_VLAN_PRIO_MASK	0xe0000000
-#define IAVF_TX_FLAGS_VLAN_PRIO_SHIFT	29
-#define IAVF_TX_FLAGS_VLAN_SHIFT	16
+#define IAVF_TX_FLAGS_HW_VLAN			BIT(1)
+#define IAVF_TX_FLAGS_SW_VLAN			BIT(2)
+#define IAVF_TX_FLAGS_TSO			BIT(3)
+#define IAVF_TX_FLAGS_IPV4			BIT(4)
+#define IAVF_TX_FLAGS_IPV6			BIT(5)
+#define IAVF_TX_FLAGS_FCCRC			BIT(6)
+#define IAVF_TX_FLAGS_FSO			BIT(7)
+#define IAVF_TX_FLAGS_FD_SB			BIT(9)
+#define IAVF_TX_FLAGS_VXLAN_TUNNEL		BIT(10)
+#define IAVF_TX_FLAGS_HW_OUTER_SINGLE_VLAN	BIT(11)
+#define IAVF_TX_FLAGS_VLAN_MASK			0xffff0000
+#define IAVF_TX_FLAGS_VLAN_PRIO_MASK		0xe0000000
+#define IAVF_TX_FLAGS_VLAN_PRIO_SHIFT		29
+#define IAVF_TX_FLAGS_VLAN_SHIFT		16
 
 struct iavf_tx_buffer {
 	struct iavf_tx_desc *next_to_watch;
@@ -362,6 +363,9 @@ struct iavf_ring {
 	u16 flags;
 #define IAVF_TXR_FLAGS_WB_ON_ITR		BIT(0)
 #define IAVF_RXR_FLAGS_BUILD_SKB_ENABLED	BIT(1)
+#define IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1	BIT(3)
+#define IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2	BIT(4)
+#define IAVF_RXR_FLAGS_VLAN_TAG_LOC_L2TAG2_2	BIT(5)
 
 	/* stats structs */
 	struct iavf_queue_stats	stats;