Message-Id: <20240821121539.374343-10-wojciech.drewek@intel.com>
Date: Wed, 21 Aug 2024 14:15:34 +0200
From: Wojciech Drewek <wojciech.drewek@...el.com>
To: netdev@...r.kernel.org
Cc: intel-wired-lan@...ts.osuosl.org,
	horms@...nel.org,
	anthony.l.nguyen@...el.com,
	kuba@...nel.org,
	alexandr.lobakin@...el.com
Subject: [PATCH iwl-next v10 09/14] libeth: move idpf_rx_csum_decoded and idpf_rx_extracted

From: Mateusz Polchlopek <mateusz.polchlopek@...el.com>

Structs idpf_rx_csum_decoded and idpf_rx_extracted are used both in
idpf and iavf Intel drivers. This commit changes the prefix from
idpf_* to libeth_* and moves mentioned structs to libeth's rx.h header
file.

Usage in idpf driver has been adjusted.

Suggested-by: Alexander Lobakin <aleksander.lobakin@...el.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
 .../ethernet/intel/idpf/idpf_singleq_txrx.c   | 51 ++++++++++---------
 drivers/net/ethernet/intel/idpf/idpf_txrx.c   | 16 +++---
 drivers/net/ethernet/intel/idpf/idpf_txrx.h   | 19 -------
 include/net/libeth/rx.h                       | 42 +++++++++++++++
 4 files changed, 77 insertions(+), 51 deletions(-)

diff --git a/drivers/net/ethernet/intel/idpf/idpf_singleq_txrx.c b/drivers/net/ethernet/intel/idpf/idpf_singleq_txrx.c
index c6ce819b3528..e57d366ed576 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_singleq_txrx.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_singleq_txrx.c
@@ -592,7 +592,7 @@ static bool idpf_rx_singleq_is_non_eop(const union virtchnl2_rx_desc *rx_desc)
  */
 static void idpf_rx_singleq_csum(struct idpf_rx_queue *rxq,
 				 struct sk_buff *skb,
-				 struct idpf_rx_csum_decoded csum_bits,
+				 struct libeth_rx_csum csum_bits,
 				 struct libeth_rx_pt decoded,
 				 struct libeth_rq_napi_stats *rs)
 {
@@ -663,10 +663,10 @@ static void idpf_rx_singleq_csum(struct idpf_rx_queue *rxq,
  *
  * Return: parsed checksum status.
  **/
-static struct idpf_rx_csum_decoded
+static struct libeth_rx_csum
 idpf_rx_singleq_base_csum(const union virtchnl2_rx_desc *rx_desc)
 {
-	struct idpf_rx_csum_decoded csum_bits = { };
+	struct libeth_rx_csum csum_bits = { };
 	u32 rx_error, rx_status;
 	u64 qword;
 
@@ -698,10 +698,10 @@ idpf_rx_singleq_base_csum(const union virtchnl2_rx_desc *rx_desc)
  *
  * Return: parsed checksum status.
  **/
-static struct idpf_rx_csum_decoded
+static struct libeth_rx_csum
 idpf_rx_singleq_flex_csum(const union virtchnl2_rx_desc *rx_desc)
 {
-	struct idpf_rx_csum_decoded csum_bits = { };
+	struct libeth_rx_csum csum_bits = { };
 	u16 rx_status0, rx_status1;
 
 	rx_status0 = le16_to_cpu(rx_desc->flex_nic_wb.status_error0);
@@ -802,7 +802,7 @@ idpf_rx_singleq_process_skb_fields(struct idpf_rx_queue *rx_q,
 				   struct libeth_rq_napi_stats *rs)
 {
 	struct libeth_rx_pt decoded = rx_q->rx_ptype_lkup[ptype];
-	struct idpf_rx_csum_decoded csum_bits;
+	struct libeth_rx_csum csum_bits;
 
 	/* modifies the skb - consumes the enet header */
 	skb->protocol = eth_type_trans(skb, rx_q->netdev);
@@ -895,6 +895,7 @@ bool idpf_rx_singleq_buf_hw_alloc_all(struct idpf_rx_queue *rx_q,
  * idpf_rx_singleq_extract_base_fields - Extract fields from the Rx descriptor
  * @rx_desc: the descriptor to process
  * @fields: storage for extracted values
+ * @ptype: pointer that will store packet type
  *
  * Decode the Rx descriptor and extract relevant information including the
  * size and Rx packet type.
@@ -904,20 +905,21 @@ bool idpf_rx_singleq_buf_hw_alloc_all(struct idpf_rx_queue *rx_q,
  */
 static void
 idpf_rx_singleq_extract_base_fields(const union virtchnl2_rx_desc *rx_desc,
-				    struct idpf_rx_extracted *fields)
+				    struct libeth_rqe_info *fields, u32 *ptype)
 {
 	u64 qword;
 
 	qword = le64_to_cpu(rx_desc->base_wb.qword1.status_error_ptype_len);
 
-	fields->size = FIELD_GET(VIRTCHNL2_RX_BASE_DESC_QW1_LEN_PBUF_M, qword);
-	fields->rx_ptype = FIELD_GET(VIRTCHNL2_RX_BASE_DESC_QW1_PTYPE_M, qword);
+	fields->len = FIELD_GET(VIRTCHNL2_RX_BASE_DESC_QW1_LEN_PBUF_M, qword);
+	*ptype = FIELD_GET(VIRTCHNL2_RX_BASE_DESC_QW1_PTYPE_M, qword);
 }
 
 /**
  * idpf_rx_singleq_extract_flex_fields - Extract fields from the Rx descriptor
  * @rx_desc: the descriptor to process
  * @fields: storage for extracted values
+ * @ptype: pointer that will store packet type
  *
  * Decode the Rx descriptor and extract relevant information including the
  * size and Rx packet type.
@@ -927,12 +929,12 @@ idpf_rx_singleq_extract_base_fields(const union virtchnl2_rx_desc *rx_desc,
  */
 static void
 idpf_rx_singleq_extract_flex_fields(const union virtchnl2_rx_desc *rx_desc,
-				    struct idpf_rx_extracted *fields)
+				    struct libeth_rqe_info *fields, u32 *ptype)
 {
-	fields->size = FIELD_GET(VIRTCHNL2_RX_FLEX_DESC_PKT_LEN_M,
-				 le16_to_cpu(rx_desc->flex_nic_wb.pkt_len));
-	fields->rx_ptype = FIELD_GET(VIRTCHNL2_RX_FLEX_DESC_PTYPE_M,
-				     le16_to_cpu(rx_desc->flex_nic_wb.ptype_flex_flags0));
+	fields->len = FIELD_GET(VIRTCHNL2_RX_FLEX_DESC_PKT_LEN_M,
+				le16_to_cpu(rx_desc->flex_nic_wb.pkt_len));
+	*ptype = FIELD_GET(VIRTCHNL2_RX_FLEX_DESC_PTYPE_M,
+			   le16_to_cpu(rx_desc->flex_nic_wb.ptype_flex_flags0));
 }
 
 /**
@@ -940,17 +942,18 @@ idpf_rx_singleq_extract_flex_fields(const union virtchnl2_rx_desc *rx_desc,
  * @rx_q: Rx descriptor queue
  * @rx_desc: the descriptor to process
  * @fields: storage for extracted values
+ * @ptype: pointer that will store packet type
  *
  */
 static void
 idpf_rx_singleq_extract_fields(const struct idpf_rx_queue *rx_q,
 			       const union virtchnl2_rx_desc *rx_desc,
-			       struct idpf_rx_extracted *fields)
+			       struct libeth_rqe_info *fields, u32 *ptype)
 {
 	if (rx_q->rxdids == VIRTCHNL2_RXDID_1_32B_BASE_M)
-		idpf_rx_singleq_extract_base_fields(rx_desc, fields);
+		idpf_rx_singleq_extract_base_fields(rx_desc, fields, ptype);
 	else
-		idpf_rx_singleq_extract_flex_fields(rx_desc, fields);
+		idpf_rx_singleq_extract_flex_fields(rx_desc, fields, ptype);
 }
 
 /**
@@ -970,9 +973,10 @@ static int idpf_rx_singleq_clean(struct idpf_rx_queue *rx_q, int budget)
 
 	/* Process Rx packets bounded by budget */
 	while (likely(rs.packets < budget)) {
-		struct idpf_rx_extracted fields = { };
+		struct libeth_rqe_info fields = { };
 		union virtchnl2_rx_desc *rx_desc;
 		struct idpf_rx_buf *rx_buf;
+		u32 ptype;
 
 		/* get the Rx desc from Rx queue based on 'next_to_clean' */
 		rx_desc = &rx_q->rx[ntc];
@@ -993,16 +997,16 @@ static int idpf_rx_singleq_clean(struct idpf_rx_queue *rx_q, int budget)
 		 */
 		dma_rmb();
 
-		idpf_rx_singleq_extract_fields(rx_q, rx_desc, &fields);
+		idpf_rx_singleq_extract_fields(rx_q, rx_desc, &fields, &ptype);
 
 		rx_buf = &rx_q->rx_buf[ntc];
-		if (!libeth_rx_sync_for_cpu(rx_buf, fields.size))
+		if (!libeth_rx_sync_for_cpu(rx_buf, fields.len))
 			goto skip_data;
 
 		if (skb)
-			idpf_rx_add_frag(rx_buf, skb, fields.size);
+			idpf_rx_add_frag(rx_buf, skb, fields.len);
 		else
-			skb = idpf_rx_build_skb(rx_buf, fields.size);
+			skb = idpf_rx_build_skb(rx_buf, fields.len);
 
 		/* exit if we failed to retrieve a buffer */
 		if (!skb)
@@ -1037,8 +1041,7 @@ static int idpf_rx_singleq_clean(struct idpf_rx_queue *rx_q, int budget)
 		rs.bytes += skb->len;
 
 		/* protocol */
-		idpf_rx_singleq_process_skb_fields(rx_q, skb,
-						   rx_desc, fields.rx_ptype,
+		idpf_rx_singleq_process_skb_fields(rx_q, skb, rx_desc, ptype,
 						   &rs);
 
 		/* send completed skb up the stack */
diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.c b/drivers/net/ethernet/intel/idpf/idpf_txrx.c
index 7a597bd2bb25..09c803055332 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_txrx.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.c
@@ -2896,7 +2896,7 @@ idpf_rx_hash(const struct idpf_rx_queue *rxq, struct sk_buff *skb,
  * skb->protocol must be set before this function is called
  */
 static void idpf_rx_csum(struct idpf_rx_queue *rxq, struct sk_buff *skb,
-			 struct idpf_rx_csum_decoded csum_bits,
+			 struct libeth_rx_csum csum_bits,
 			 struct libeth_rx_pt decoded,
 			 struct libeth_rq_napi_stats *rs)
 {
@@ -2925,7 +2925,7 @@ static void idpf_rx_csum(struct idpf_rx_queue *rxq, struct sk_buff *skb,
 	if (unlikely(csum_bits.l4e))
 		goto bad;
 
-	if (csum_bits.raw_csum_inv ||
+	if (!csum_bits.raw_csum_valid ||
 	    decoded.inner_prot == LIBETH_RX_PT_INNER_SCTP) {
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 		rs->csum_unnecessary++;
@@ -2951,10 +2951,10 @@ static void idpf_rx_csum(struct idpf_rx_queue *rxq, struct sk_buff *skb,
  *
  * Return: parsed checksum status.
  **/
-static struct idpf_rx_csum_decoded
+static struct libeth_rx_csum
 idpf_rx_splitq_extract_csum_bits(const struct virtchnl2_rx_flex_desc_adv_nic_3 *rx_desc)
 {
-	struct idpf_rx_csum_decoded csum = { };
+	struct libeth_rx_csum csum = { };
 	u8 qword0, qword1;
 
 	qword0 = rx_desc->status_err0_qw0;
@@ -2970,9 +2970,9 @@ idpf_rx_splitq_extract_csum_bits(const struct virtchnl2_rx_flex_desc_adv_nic_3 *
 			       qword1);
 	csum.ipv6exadd = FIELD_GET(VIRTCHNL2_RX_FLEX_DESC_ADV_STATUS0_IPV6EXADD_M,
 				   qword0);
-	csum.raw_csum_inv =
-		le16_get_bits(rx_desc->ptype_err_fflags0,
-			      VIRTCHNL2_RX_FLEX_DESC_ADV_RAW_CSUM_INV_M);
+	csum.raw_csum_valid =
+		!le16_get_bits(rx_desc->ptype_err_fflags0,
+			       VIRTCHNL2_RX_FLEX_DESC_ADV_RAW_CSUM_INV_M);
 	csum.raw_csum = le16_to_cpu(rx_desc->misc.raw_cs);
 
 	return csum;
@@ -3068,7 +3068,7 @@ idpf_rx_process_skb_fields(struct idpf_rx_queue *rxq, struct sk_buff *skb,
 			   const struct virtchnl2_rx_flex_desc_adv_nic_3 *rx_desc,
 			   struct libeth_rq_napi_stats *rs)
 {
-	struct idpf_rx_csum_decoded csum_bits;
+	struct libeth_rx_csum csum_bits;
 	struct libeth_rx_pt decoded;
 	u16 rx_ptype;
 
diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.h b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
index 8188f5cb418b..46ae7832a0b2 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_txrx.h
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
@@ -216,25 +216,6 @@ enum idpf_tx_ctx_desc_eipt_offload {
 	IDPF_TX_CTX_EXT_IP_IPV4         = 0x3
 };
 
-/* Checksum offload bits decoded from the receive descriptor. */
-struct idpf_rx_csum_decoded {
-	u32 l3l4p : 1;
-	u32 ipe : 1;
-	u32 eipe : 1;
-	u32 eudpe : 1;
-	u32 ipv6exadd : 1;
-	u32 l4e : 1;
-	u32 pprs : 1;
-	u32 nat : 1;
-	u32 raw_csum_inv : 1;
-	u32 raw_csum : 16;
-};
-
-struct idpf_rx_extracted {
-	unsigned int size;
-	u16 rx_ptype;
-};
-
 #define IDPF_TX_COMPLQ_CLEAN_BUDGET	256
 #define IDPF_TX_MIN_PKT_LEN		17
 #define IDPF_TX_DESCS_FOR_SKB_DATA_PTR	1
diff --git a/include/net/libeth/rx.h b/include/net/libeth/rx.h
index 43574bd6612f..03e371633f4f 100644
--- a/include/net/libeth/rx.h
+++ b/include/net/libeth/rx.h
@@ -198,6 +198,48 @@ struct libeth_rx_pt {
 	enum xdp_rss_hash_type			hash_type:16;
 };
 
+/**
+ * struct libeth_rx_csum - Checksum offload bits decoded from the Rx descriptor
+ * @l3l4p: detectable L3 and L4 integrity check is processed by the hardware
+ * @ipe: IP checksum error
+ * @eipe: external (outermost) IP header (only for tunels)
+ * @eudpe: external (outermost) UDP checksum error (only for tunels)
+ * @ipv6exadd: IPv6 header with extension headers
+ * @l4e: L4 integrity error
+ * @pprs: set for packets that skip checksum calculation in the HW pre parser
+ * @nat: the packet is a UDP tunneled packet
+ * @raw_csum_valid: set if raw checksum is valid
+ * @pad: padding to naturally align raw_csum field
+ * @raw_csum: raw checksum
+ */
+struct libeth_rx_csum {
+	u32					l3l4p:1;
+	u32					ipe:1;
+	u32					eipe:1;
+	u32					eudpe:1;
+	u32					ipv6exadd:1;
+	u32					l4e:1;
+	u32					pprs:1;
+	u32					nat:1;
+	u32					raw_csum_valid:1;
+	u32					pad:7;
+	u32					raw_csum:16;
+};
+
+/**
+ * struct libeth_rqe_info - receive queue element info
+ * @len: packet length
+ * @vlan_tag: vlan tag
+ * @eop: end of packet
+ * @rxe: MAC errors: CRC, Alignment, Oversize, Undersizes, Length error
+ */
+struct libeth_rqe_info {
+	u32					len;
+	u32					vlan_tag:16;
+	u32					eop:1;
+	u32					rxe:1;
+};
+
 void libeth_rx_pt_gen_hash_type(struct libeth_rx_pt *pt);
 
 /**
-- 
2.40.1

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