1 files changed, 135 insertions, 39 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
index 6da048a6ca7c..7ee38d02d1e5 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
@@ -1,14 +1,18 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright (c) 2019, Intel Corporation. */
 
+#include <linux/filter.h>
+
 #include "ice_txrx_lib.h"
+#include "ice_eswitch.h"
+#include "ice_lib.h"
 
 /**
  * ice_release_rx_desc - Store the new tail and head values
  * @rx_ring: ring to bump
  * @val: new head index
  */
-void ice_release_rx_desc(struct ice_ring *rx_ring, u32 val)
+void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val)
 {
 	u16 prev_ntu = rx_ring->next_to_use & ~0x7;
 
@@ -38,10 +42,23 @@ void ice_release_rx_desc(struct ice_ring *rx_ring, u32 val)
  * ice_ptype_to_htype - get a hash type
  * @ptype: the ptype value from the descriptor
  *
- * Returns a hash type to be used by skb_set_hash
+ * 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.
  */
-static enum pkt_hash_types ice_ptype_to_htype(u8 __always_unused ptype)
+static enum pkt_hash_types ice_ptype_to_htype(u16 ptype)
 {
+	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;
 }
 
@@ -53,8 +70,8 @@ static enum pkt_hash_types ice_ptype_to_htype(u8 __always_unused ptype)
  * @rx_ptype: the ptype value from the descriptor
  */
 static void
-ice_rx_hash(struct ice_ring *rx_ring, union ice_32b_rx_flex_desc *rx_desc,
-	    struct sk_buff *skb, u8 rx_ptype)
+ice_rx_hash(struct ice_rx_ring *rx_ring, union ice_32b_rx_flex_desc *rx_desc,
+	    struct sk_buff *skb, u16 rx_ptype)
 {
 	struct ice_32b_rx_flex_desc_nic *nic_mdid;
 	u32 hash;
@@ -80,15 +97,15 @@ ice_rx_hash(struct ice_ring *rx_ring, union ice_32b_rx_flex_desc *rx_desc,
  * skb->protocol must be set before this function is called
  */
 static void
-ice_rx_csum(struct ice_ring *ring, struct sk_buff *skb,
-	    union ice_32b_rx_flex_desc *rx_desc, u8 ptype)
+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;
-	u32 rx_error, rx_status;
+	u16 rx_status0, rx_status1;
 	bool ipv4, ipv6;
 
-	rx_status = le16_to_cpu(rx_desc->wb.status_error0);
-	rx_error = rx_status;
+	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);
 
@@ -101,7 +118,7 @@ ice_rx_csum(struct ice_ring *ring, struct sk_buff *skb,
 		return;
 
 	/* check if HW has decoded the packet and checksum */
-	if (!(rx_status & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S)))
+	if (!(rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S)))
 		return;
 
 	if (!(decoded.known && decoded.outer_ip))
@@ -112,25 +129,38 @@ ice_rx_csum(struct ice_ring *ring, struct sk_buff *skb,
 	ipv6 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) &&
 	       (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV6);
 
-	if (ipv4 && (rx_error & (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) |
+				   BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S))))
 		goto checksum_fail;
-	else if (ipv6 && (rx_status &
-		 (BIT(ICE_RX_FLEX_DESC_STATUS0_IPV6EXADD_S))))
+
+	if (ipv6 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_IPV6EXADD_S))))
 		goto checksum_fail;
 
 	/* check for L4 errors and handle packets that were not able to be
 	 * checksummed due to arrival speed
 	 */
-	if (rx_error & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_L4E_S))
+	if (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_L4E_S))
 		goto checksum_fail;
 
+	/* check for outer UDP checksum error in tunneled packets */
+	if ((rx_status1 & BIT(ICE_RX_FLEX_DESC_STATUS1_NAT_S)) &&
+	    (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EUDPE_S)))
+		goto checksum_fail;
+
+	/* If there is an outer header present that might contain a checksum
+	 * 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)
+		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;
 	}
@@ -152,9 +182,9 @@ checksum_fail:
  * other fields within the skb.
  */
 void
-ice_process_skb_fields(struct ice_ring *rx_ring,
+ice_process_skb_fields(struct ice_rx_ring *rx_ring,
 		       union ice_32b_rx_flex_desc *rx_desc,
-		       struct sk_buff *skb, u8 ptype)
+		       struct sk_buff *skb, u16 ptype)
 {
 	ice_rx_hash(rx_ring, rx_desc, skb, ptype);
 
@@ -162,6 +192,9 @@ ice_process_skb_fields(struct ice_ring *rx_ring,
 	skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 
 	ice_rx_csum(rx_ring, skb, rx_desc, ptype);
+
+	if (rx_ring->ptp_rx)
+		ice_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
 }
 
 /**
@@ -174,27 +207,83 @@ ice_process_skb_fields(struct ice_ring *rx_ring,
  * gro receive functions (with/without VLAN tag)
  */
 void
-ice_receive_skb(struct ice_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_tag)
 {
-	if ((rx_ring->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
-	    (vlan_tag & VLAN_VID_MASK))
+	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);
+
 	napi_gro_receive(&rx_ring->q_vector->napi, skb);
 }
 
 /**
+ * ice_clean_xdp_irq - Reclaim resources after transmit completes on XDP ring
+ * @xdp_ring: XDP ring to clean
+ */
+static void ice_clean_xdp_irq(struct ice_tx_ring *xdp_ring)
+{
+	unsigned int total_bytes = 0, total_pkts = 0;
+	u16 tx_thresh = ICE_RING_QUARTER(xdp_ring);
+	u16 ntc = xdp_ring->next_to_clean;
+	struct ice_tx_desc *next_dd_desc;
+	u16 next_dd = xdp_ring->next_dd;
+	struct ice_tx_buf *tx_buf;
+	int i;
+
+	next_dd_desc = ICE_TX_DESC(xdp_ring, next_dd);
+	if (!(next_dd_desc->cmd_type_offset_bsz &
+	    cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)))
+		return;
+
+	for (i = 0; i < tx_thresh; i++) {
+		tx_buf = &xdp_ring->tx_buf[ntc];
+
+		total_bytes += tx_buf->bytecount;
+		/* normally tx_buf->gso_segs was taken but at this point
+		 * it's always 1 for us
+		 */
+		total_pkts++;
+
+		page_frag_free(tx_buf->raw_buf);
+		dma_unmap_single(xdp_ring->dev, dma_unmap_addr(tx_buf, dma),
+				 dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
+		dma_unmap_len_set(tx_buf, len, 0);
+		tx_buf->raw_buf = NULL;
+
+		ntc++;
+		if (ntc >= xdp_ring->count)
+			ntc = 0;
+	}
+
+	next_dd_desc->cmd_type_offset_bsz = 0;
+	xdp_ring->next_dd = xdp_ring->next_dd + tx_thresh;
+	if (xdp_ring->next_dd > xdp_ring->count)
+		xdp_ring->next_dd = tx_thresh - 1;
+	xdp_ring->next_to_clean = ntc;
+	ice_update_tx_ring_stats(xdp_ring, total_pkts, total_bytes);
+}
+
+/**
  * ice_xmit_xdp_ring - submit single packet to XDP ring for transmission
  * @data: packet data pointer
  * @size: packet data size
  * @xdp_ring: XDP ring for transmission
  */
-int ice_xmit_xdp_ring(void *data, u16 size, struct ice_ring *xdp_ring)
+int ice_xmit_xdp_ring(void *data, u16 size, struct ice_tx_ring *xdp_ring)
 {
+	u16 tx_thresh = ICE_RING_QUARTER(xdp_ring);
 	u16 i = xdp_ring->next_to_use;
 	struct ice_tx_desc *tx_desc;
 	struct ice_tx_buf *tx_buf;
 	dma_addr_t dma;
 
+	if (ICE_DESC_UNUSED(xdp_ring) < tx_thresh)
+		ice_clean_xdp_irq(xdp_ring);
+
 	if (!unlikely(ICE_DESC_UNUSED(xdp_ring))) {
 		xdp_ring->tx_stats.tx_busy++;
 		return ICE_XDP_CONSUMED;
@@ -215,21 +304,27 @@ int ice_xmit_xdp_ring(void *data, u16 size, struct ice_ring *xdp_ring)
 
 	tx_desc = ICE_TX_DESC(xdp_ring, i);
 	tx_desc->buf_addr = cpu_to_le64(dma);
-	tx_desc->cmd_type_offset_bsz = build_ctob(ICE_TXD_LAST_DESC_CMD, 0,
-						  size, 0);
-
-	/* Make certain all of the status bits have been updated
-	 * before next_to_watch is written.
-	 */
-	smp_wmb();
+	tx_desc->cmd_type_offset_bsz = ice_build_ctob(ICE_TX_DESC_CMD_EOP, 0,
+						      size, 0);
 
+	xdp_ring->xdp_tx_active++;
 	i++;
-	if (i == xdp_ring->count)
+	if (i == xdp_ring->count) {
 		i = 0;
-
-	tx_buf->next_to_watch = tx_desc;
+		tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_rs);
+		tx_desc->cmd_type_offset_bsz |=
+			cpu_to_le64(ICE_TX_DESC_CMD_RS << ICE_TXD_QW1_CMD_S);
+		xdp_ring->next_rs = tx_thresh - 1;
+	}
 	xdp_ring->next_to_use = i;
 
+	if (i > xdp_ring->next_rs) {
+		tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_rs);
+		tx_desc->cmd_type_offset_bsz |=
+			cpu_to_le64(ICE_TX_DESC_CMD_RS << ICE_TXD_QW1_CMD_S);
+		xdp_ring->next_rs += tx_thresh;
+	}
+
 	return ICE_XDP_TX;
 }
 
@@ -240,9 +335,9 @@ int ice_xmit_xdp_ring(void *data, u16 size, struct ice_ring *xdp_ring)
  *
  * Returns negative on failure, 0 on success.
  */
-int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_ring *xdp_ring)
+int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring)
 {
-	struct xdp_frame *xdpf = convert_to_xdp_frame(xdp);
+	struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp);
 
 	if (unlikely(!xdpf))
 		return ICE_XDP_CONSUMED;
@@ -252,22 +347,23 @@ int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_ring *xdp_ring)
 
 /**
  * ice_finalize_xdp_rx - Bump XDP Tx tail and/or flush redirect map
- * @rx_ring: Rx ring
+ * @xdp_ring: XDP ring
  * @xdp_res: Result of the receive batch
  *
  * This function bumps XDP Tx tail and/or flush redirect map, and
  * should be called when a batch of packets has been processed in the
  * napi loop.
  */
-void ice_finalize_xdp_rx(struct ice_ring *rx_ring, unsigned int xdp_res)
+void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res)
 {
 	if (xdp_res & ICE_XDP_REDIR)
 		xdp_do_flush_map();
 
 	if (xdp_res & ICE_XDP_TX) {
-		struct ice_ring *xdp_ring =
-			rx_ring->vsi->xdp_rings[rx_ring->q_index];
-
+		if (static_branch_unlikely(&ice_xdp_locking_key))
+			spin_lock(&xdp_ring->tx_lock);
 		ice_xdp_ring_update_tail(xdp_ring);
+		if (static_branch_unlikely(&ice_xdp_locking_key))
+			spin_unlock(&xdp_ring->tx_lock);
 	}
 }