1 files changed, 222 insertions, 84 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
index c8322fb6f2b3..956da38d63b0 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
@@ -2,6 +2,8 @@
 /* Copyright (c) 2019, Intel Corporation. */
 
 #include <linux/filter.h>
+#include <linux/net/intel/libie/rx.h>
+#include <net/libeth/xdp.h>
 
 #include "ice_txrx_lib.h"
 #include "ice_eswitch.h"
@@ -39,52 +41,61 @@ void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val)
 }
 
 /**
- * ice_ptype_to_htype - get a hash type
- * @ptype: the ptype value from the descriptor
+ * ice_get_rx_hash - get RX hash value from descriptor
+ * @rx_desc: specific descriptor
  *
- * Returns appropriate hash type (such as PKT_HASH_TYPE_L2/L3/L4) to be used by
- * skb_set_hash based on PTYPE as parsed by HW Rx pipeline and is part of
- * Rx desc.
+ * Returns hash, if present, 0 otherwise.
  */
-static enum pkt_hash_types ice_ptype_to_htype(u16 ptype)
+static u32 ice_get_rx_hash(const union ice_32b_rx_flex_desc *rx_desc)
 {
-	struct ice_rx_ptype_decoded decoded = ice_decode_rx_desc_ptype(ptype);
-
-	if (!decoded.known)
-		return PKT_HASH_TYPE_NONE;
-	if (decoded.payload_layer == ICE_RX_PTYPE_PAYLOAD_LAYER_PAY4)
-		return PKT_HASH_TYPE_L4;
-	if (decoded.payload_layer == ICE_RX_PTYPE_PAYLOAD_LAYER_PAY3)
-		return PKT_HASH_TYPE_L3;
-	if (decoded.outer_ip == ICE_RX_PTYPE_OUTER_L2)
-		return PKT_HASH_TYPE_L2;
-
-	return PKT_HASH_TYPE_NONE;
+	const struct ice_32b_rx_flex_desc_nic *nic_mdid;
+
+	if (unlikely(rx_desc->wb.rxdid != ICE_RXDID_FLEX_NIC))
+		return 0;
+
+	nic_mdid = (struct ice_32b_rx_flex_desc_nic *)rx_desc;
+	return le32_to_cpu(nic_mdid->rss_hash);
 }
 
 /**
- * ice_rx_hash - set the hash value in the skb
+ * ice_rx_hash_to_skb - set the hash value in the skb
  * @rx_ring: descriptor ring
  * @rx_desc: specific descriptor
  * @skb: pointer to current skb
  * @rx_ptype: the ptype value from the descriptor
  */
 static void
-ice_rx_hash(struct ice_rx_ring *rx_ring, union ice_32b_rx_flex_desc *rx_desc,
-	    struct sk_buff *skb, u16 rx_ptype)
+ice_rx_hash_to_skb(const struct ice_rx_ring *rx_ring,
+		   const union ice_32b_rx_flex_desc *rx_desc,
+		   struct sk_buff *skb, u16 rx_ptype)
 {
-	struct ice_32b_rx_flex_desc_nic *nic_mdid;
+	struct libeth_rx_pt decoded;
 	u32 hash;
 
-	if (!(rx_ring->netdev->features & NETIF_F_RXHASH))
+	decoded = libie_rx_pt_parse(rx_ptype);
+	if (!libeth_rx_pt_has_hash(rx_ring->netdev, decoded))
 		return;
 
-	if (rx_desc->wb.rxdid != ICE_RXDID_FLEX_NIC)
-		return;
+	hash = ice_get_rx_hash(rx_desc);
+	if (likely(hash))
+		libeth_rx_pt_set_hash(skb, hash, decoded);
+}
 
-	nic_mdid = (struct ice_32b_rx_flex_desc_nic *)rx_desc;
-	hash = le32_to_cpu(nic_mdid->rss_hash);
-	skb_set_hash(skb, hash, ice_ptype_to_htype(rx_ptype));
+/**
+ * ice_rx_gcs - Set generic checksum in skb
+ * @skb: skb currently being received and modified
+ * @rx_desc: receive descriptor
+ */
+static void ice_rx_gcs(struct sk_buff *skb,
+		       const union ice_32b_rx_flex_desc *rx_desc)
+{
+	const struct ice_32b_rx_flex_desc_nic *desc;
+	u16 csum;
+
+	desc = (struct ice_32b_rx_flex_desc_nic *)rx_desc;
+	skb->ip_summed = CHECKSUM_COMPLETE;
+	csum = (__force u16)desc->raw_csum;
+	skb->csum = csum_unfold((__force __sum16)swab16(csum));
 }
 
 /**
@@ -100,37 +111,42 @@ static void
 ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb,
 	    union ice_32b_rx_flex_desc *rx_desc, u16 ptype)
 {
-	struct ice_rx_ptype_decoded decoded;
+	struct libeth_rx_pt decoded;
 	u16 rx_status0, rx_status1;
 	bool ipv4, ipv6;
 
-	rx_status0 = le16_to_cpu(rx_desc->wb.status_error0);
-	rx_status1 = le16_to_cpu(rx_desc->wb.status_error1);
-
-	decoded = ice_decode_rx_desc_ptype(ptype);
-
 	/* Start with CHECKSUM_NONE and by default csum_level = 0 */
 	skb->ip_summed = CHECKSUM_NONE;
-	skb_checksum_none_assert(skb);
 
-	/* check if Rx checksum is enabled */
-	if (!(ring->netdev->features & NETIF_F_RXCSUM))
+	decoded = libie_rx_pt_parse(ptype);
+	if (!libeth_rx_pt_has_checksum(ring->netdev, decoded))
+		return;
+
+	rx_status0 = le16_to_cpu(rx_desc->wb.status_error0);
+	rx_status1 = le16_to_cpu(rx_desc->wb.status_error1);
+
+	if ((ring->flags & ICE_RX_FLAGS_RING_GCS) &&
+	    rx_desc->wb.rxdid == ICE_RXDID_FLEX_NIC &&
+	    (decoded.inner_prot == LIBETH_RX_PT_INNER_TCP ||
+	     decoded.inner_prot == LIBETH_RX_PT_INNER_UDP ||
+	     decoded.inner_prot == LIBETH_RX_PT_INNER_ICMP)) {
+		ice_rx_gcs(skb, rx_desc);
 		return;
+	}
 
 	/* check if HW has decoded the packet and checksum */
 	if (!(rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S)))
 		return;
 
-	if (!(decoded.known && decoded.outer_ip))
-		return;
+	ipv4 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV4;
+	ipv6 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV6;
 
-	ipv4 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) &&
-	       (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV4);
-	ipv6 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) &&
-	       (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV6);
+	if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S)))) {
+		ring->vsi->back->hw_rx_eipe_error++;
+		return;
+	}
 
-	if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_IPE_S) |
-				   BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S))))
+	if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_IPE_S))))
 		goto checksum_fail;
 
 	if (ipv6 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_IPV6EXADD_S))))
@@ -151,19 +167,10 @@ ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb,
 	 * we need to bump the checksum level by 1 to reflect the fact that
 	 * we are indicating we validated the inner checksum.
 	 */
-	if (decoded.tunnel_type >= ICE_RX_PTYPE_TUNNEL_IP_GRENAT)
+	if (decoded.tunnel_type >= LIBETH_RX_PT_TUNNEL_IP_GRENAT)
 		skb->csum_level = 1;
 
-	/* Only report checksum unnecessary for TCP, UDP, or SCTP */
-	switch (decoded.inner_prot) {
-	case ICE_RX_PTYPE_INNER_PROT_TCP:
-	case ICE_RX_PTYPE_INNER_PROT_UDP:
-	case ICE_RX_PTYPE_INNER_PROT_SCTP:
-		skb->ip_summed = CHECKSUM_UNNECESSARY;
-		break;
-	default:
-		break;
-	}
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
 	return;
 
 checksum_fail:
@@ -171,11 +178,38 @@ checksum_fail:
 }
 
 /**
+ * ice_ptp_rx_hwts_to_skb - Put RX timestamp into skb
+ * @rx_ring: Ring to get the VSI info
+ * @rx_desc: Receive descriptor
+ * @skb: Particular skb to send timestamp with
+ *
+ * The timestamp is in ns, so we must convert the result first.
+ */
+static void
+ice_ptp_rx_hwts_to_skb(struct ice_rx_ring *rx_ring,
+		       const union ice_32b_rx_flex_desc *rx_desc,
+		       struct sk_buff *skb)
+{
+	u64 ts_ns = ice_ptp_get_rx_hwts(rx_desc, &rx_ring->pkt_ctx);
+
+	skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(ts_ns);
+}
+
+/**
+ * ice_get_ptype - Read HW packet type from the descriptor
+ * @rx_desc: RX descriptor
+ */
+static u16 ice_get_ptype(const union ice_32b_rx_flex_desc *rx_desc)
+{
+	return le16_to_cpu(rx_desc->wb.ptype_flex_flags0) &
+	       ICE_RX_FLEX_DESC_PTYPE_M;
+}
+
+/**
  * ice_process_skb_fields - Populate skb header fields from Rx descriptor
  * @rx_ring: Rx descriptor ring packet is being transacted on
  * @rx_desc: pointer to the EOP Rx descriptor
  * @skb: pointer to current skb being populated
- * @ptype: the packet type decoded by hardware
  *
  * This function checks the ring, descriptor, and packet information in
  * order to populate the hash, checksum, VLAN, protocol, and
@@ -184,38 +218,48 @@ checksum_fail:
 void
 ice_process_skb_fields(struct ice_rx_ring *rx_ring,
 		       union ice_32b_rx_flex_desc *rx_desc,
-		       struct sk_buff *skb, u16 ptype)
+		       struct sk_buff *skb)
 {
-	ice_rx_hash(rx_ring, rx_desc, skb, ptype);
+	u16 ptype = ice_get_ptype(rx_desc);
+
+	ice_rx_hash_to_skb(rx_ring, rx_desc, skb, ptype);
 
 	/* modifies the skb - consumes the enet header */
-	skb->protocol = eth_type_trans(skb, rx_ring->netdev);
+	if (unlikely(rx_ring->flags & ICE_RX_FLAGS_MULTIDEV)) {
+		struct net_device *netdev = ice_eswitch_get_target(rx_ring,
+								   rx_desc);
+
+		if (ice_is_port_repr_netdev(netdev))
+			ice_repr_inc_rx_stats(netdev, skb->len);
+
+		/* __skb_push() is needed because xdp_build_skb_from_buff()
+		 * calls eth_type_trans()
+		 */
+		__skb_push(skb, ETH_HLEN);
+		skb->protocol = eth_type_trans(skb, netdev);
+	}
 
 	ice_rx_csum(rx_ring, skb, rx_desc, ptype);
 
 	if (rx_ring->ptp_rx)
-		ice_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
+		ice_ptp_rx_hwts_to_skb(rx_ring, rx_desc, skb);
 }
 
 /**
  * ice_receive_skb - Send a completed packet up the stack
  * @rx_ring: Rx ring in play
  * @skb: packet to send up
- * @vlan_tag: VLAN tag for packet
+ * @vlan_tci: VLAN TCI for packet
  *
  * This function sends the completed packet (via. skb) up the stack using
  * gro receive functions (with/without VLAN tag)
  */
 void
-ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag)
+ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tci)
 {
-	netdev_features_t features = rx_ring->netdev->features;
-	bool non_zero_vlan = !!(vlan_tag & VLAN_VID_MASK);
-
-	if ((features & NETIF_F_HW_VLAN_CTAG_RX) && non_zero_vlan)
-		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
-	else if ((features & NETIF_F_HW_VLAN_STAG_RX) && non_zero_vlan)
-		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021AD), vlan_tag);
+	if ((vlan_tci & VLAN_VID_MASK) && rx_ring->vlan_proto)
+		__vlan_hwaccel_put_tag(skb, rx_ring->vlan_proto,
+				       vlan_tci);
 
 	napi_gro_receive(&rx_ring->q_vector->napi, skb);
 }
@@ -230,19 +274,18 @@ static void
 ice_clean_xdp_tx_buf(struct device *dev, struct ice_tx_buf *tx_buf,
 		     struct xdp_frame_bulk *bq)
 {
-	dma_unmap_single(dev, dma_unmap_addr(tx_buf, dma),
-			 dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
-	dma_unmap_len_set(tx_buf, len, 0);
-
 	switch (tx_buf->type) {
 	case ICE_TX_BUF_XDP_TX:
-		page_frag_free(tx_buf->raw_buf);
+		libeth_xdp_return_va(tx_buf->raw_buf, true);
 		break;
 	case ICE_TX_BUF_XDP_XMIT:
+		dma_unmap_single(dev, dma_unmap_addr(tx_buf, dma),
+				 dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
 		xdp_return_frame_bulk(tx_buf->xdpf, bq);
 		break;
 	}
 
+	dma_unmap_len_set(tx_buf, len, 0);
 	tx_buf->type = ICE_TX_BUF_EMPTY;
 }
 
@@ -337,9 +380,11 @@ int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring,
 	struct ice_tx_buf *tx_buf;
 	u32 cnt = xdp_ring->count;
 	void *data = xdp->data;
+	struct page *page;
 	u32 nr_frags = 0;
 	u32 free_space;
 	u32 frag = 0;
+	u32 offset;
 
 	free_space = ICE_DESC_UNUSED(xdp_ring);
 	if (free_space < ICE_RING_QUARTER(xdp_ring))
@@ -359,24 +404,28 @@ int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring,
 	tx_head = &xdp_ring->tx_buf[ntu];
 	tx_buf = tx_head;
 
+	page = virt_to_page(data);
+	offset = offset_in_page(xdp->data);
+
 	for (;;) {
 		dma_addr_t dma;
 
-		dma = dma_map_single(dev, data, size, DMA_TO_DEVICE);
-		if (dma_mapping_error(dev, dma))
-			goto dma_unmap;
-
-		/* record length, and DMA address */
-		dma_unmap_len_set(tx_buf, len, size);
-		dma_unmap_addr_set(tx_buf, dma, dma);
-
 		if (frame) {
+			dma = dma_map_single(dev, data, size, DMA_TO_DEVICE);
+			if (dma_mapping_error(dev, dma))
+				goto dma_unmap;
 			tx_buf->type = ICE_TX_BUF_FRAG;
 		} else {
+			dma = page_pool_get_dma_addr(page) + offset;
+			dma_sync_single_for_device(dev, dma, size, DMA_BIDIRECTIONAL);
 			tx_buf->type = ICE_TX_BUF_XDP_TX;
 			tx_buf->raw_buf = data;
 		}
 
+		/* record length, and DMA address */
+		dma_unmap_len_set(tx_buf, len, size);
+		dma_unmap_addr_set(tx_buf, dma, dma);
+
 		tx_desc->buf_addr = cpu_to_le64(dma);
 		tx_desc->cmd_type_offset_bsz = ice_build_ctob(0, 0, size, 0);
 
@@ -390,6 +439,8 @@ int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring,
 		tx_desc = ICE_TX_DESC(xdp_ring, ntu);
 		tx_buf = &xdp_ring->tx_buf[ntu];
 
+		page = skb_frag_page(&sinfo->frags[frag]);
+		offset = skb_frag_off(&sinfo->frags[frag]);
 		data = skb_frag_address(&sinfo->frags[frag]);
 		size = skb_frag_size(&sinfo->frags[frag]);
 		frag++;
@@ -450,7 +501,7 @@ void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res,
 	struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[first_idx];
 
 	if (xdp_res & ICE_XDP_REDIR)
-		xdp_do_flush_map();
+		xdp_do_flush();
 
 	if (xdp_res & ICE_XDP_TX) {
 		if (static_branch_unlikely(&ice_xdp_locking_key))
@@ -464,3 +515,90 @@ void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res,
 			spin_unlock(&xdp_ring->tx_lock);
 	}
 }
+
+/**
+ * ice_xdp_rx_hw_ts - HW timestamp XDP hint handler
+ * @ctx: XDP buff pointer
+ * @ts_ns: destination address
+ *
+ * Copy HW timestamp (if available) to the destination address.
+ */
+static int ice_xdp_rx_hw_ts(const struct xdp_md *ctx, u64 *ts_ns)
+{
+	const struct libeth_xdp_buff *xdp_ext = (void *)ctx;
+	struct ice_rx_ring *rx_ring;
+
+	rx_ring = libeth_xdp_buff_to_rq(xdp_ext, typeof(*rx_ring), xdp_rxq);
+
+	*ts_ns = ice_ptp_get_rx_hwts(xdp_ext->desc,
+				     &rx_ring->pkt_ctx);
+	if (!*ts_ns)
+		return -ENODATA;
+
+	return 0;
+}
+
+/**
+ * ice_xdp_rx_hash_type - Get XDP-specific hash type from the RX descriptor
+ * @eop_desc: End of Packet descriptor
+ */
+static enum xdp_rss_hash_type
+ice_xdp_rx_hash_type(const union ice_32b_rx_flex_desc *eop_desc)
+{
+	return libie_rx_pt_parse(ice_get_ptype(eop_desc)).hash_type;
+}
+
+/**
+ * ice_xdp_rx_hash - RX hash XDP hint handler
+ * @ctx: XDP buff pointer
+ * @hash: hash destination address
+ * @rss_type: XDP hash type destination address
+ *
+ * Copy RX hash (if available) and its type to the destination address.
+ */
+static int ice_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash,
+			   enum xdp_rss_hash_type *rss_type)
+{
+	const struct libeth_xdp_buff *xdp_ext = (void *)ctx;
+
+	*hash = ice_get_rx_hash(xdp_ext->desc);
+	*rss_type = ice_xdp_rx_hash_type(xdp_ext->desc);
+	if (!likely(*hash))
+		return -ENODATA;
+
+	return 0;
+}
+
+/**
+ * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler
+ * @ctx: XDP buff pointer
+ * @vlan_proto: destination address for VLAN protocol
+ * @vlan_tci: destination address for VLAN TCI
+ *
+ * Copy VLAN tag (if was stripped) and corresponding protocol
+ * to the destination address.
+ */
+static int ice_xdp_rx_vlan_tag(const struct xdp_md *ctx, __be16 *vlan_proto,
+			       u16 *vlan_tci)
+{
+	const struct libeth_xdp_buff *xdp_ext = (void *)ctx;
+	struct ice_rx_ring *rx_ring;
+
+	rx_ring = libeth_xdp_buff_to_rq(xdp_ext, typeof(*rx_ring), xdp_rxq);
+
+	*vlan_proto = rx_ring->pkt_ctx.vlan_proto;
+	if (!*vlan_proto)
+		return -ENODATA;
+
+	*vlan_tci = ice_get_vlan_tci(xdp_ext->desc);
+	if (!*vlan_tci)
+		return -ENODATA;
+
+	return 0;
+}
+
+const struct xdp_metadata_ops ice_xdp_md_ops = {
+	.xmo_rx_timestamp		= ice_xdp_rx_hw_ts,
+	.xmo_rx_hash			= ice_xdp_rx_hash,
+	.xmo_rx_vlan_tag		= ice_xdp_rx_vlan_tag,
+};