X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fnet%2Fsfc%2Fsfc_dp_tx.h;h=dcad4fe5855c91351e63b533c5aba5d70547d710;hb=4064574535e5f9a4f576432565e8dbac768dd156;hp=885094b67613c4a19186ab1ed129907d31436285;hpb=07685524c94af5068953c2e9e2356b00939ca343;p=dpdk.git

diff --git a/drivers/net/sfc/sfc_dp_tx.h b/drivers/net/sfc/sfc_dp_tx.h
index 885094b676..dcad4fe585 100644
--- a/drivers/net/sfc/sfc_dp_tx.h
+++ b/drivers/net/sfc/sfc_dp_tx.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  *
- * Copyright (c) 2016-2018 Solarflare Communications Inc.
- * All rights reserved.
+ * Copyright(c) 2019-2020 Xilinx, Inc.
+ * Copyright(c) 2016-2019 Solarflare Communications Inc.
  *
  * This software was jointly developed between OKTET Labs (under contract
  * for Solarflare) and Solarflare Communications, Inc.
@@ -14,6 +14,7 @@
 
 #include "sfc_dp.h"
 #include "sfc_debug.h"
+#include "sfc_tso.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -156,12 +157,17 @@ struct sfc_dp_tx {
 	struct sfc_dp			dp;
 
 	unsigned int			features;
-#define SFC_DP_TX_FEAT_VLAN_INSERT	0x1
-#define SFC_DP_TX_FEAT_TSO		0x2
-#define SFC_DP_TX_FEAT_MULTI_SEG	0x4
-#define SFC_DP_TX_FEAT_MULTI_PROCESS	0x8
-#define SFC_DP_TX_FEAT_MULTI_POOL	0x10
-#define SFC_DP_TX_FEAT_REFCNT		0x20
+#define SFC_DP_TX_FEAT_MULTI_PROCESS	0x1
+	/**
+	 * Tx offload capabilities supported by the datapath on device
+	 * level only if HW/FW supports it.
+	 */
+	uint64_t			dev_offload_capa;
+	/**
+	 * Tx offload capabilities supported by the datapath per-queue
+	 * if HW/FW supports it.
+	 */
+	uint64_t			queue_offload_capa;
 	sfc_dp_tx_get_dev_info_t	*get_dev_info;
 	sfc_dp_tx_qsize_up_rings_t	*qsize_up_rings;
 	sfc_dp_tx_qcreate_t		*qcreate;
@@ -194,9 +200,21 @@ sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
 /** Get Tx datapath ops by the datapath TxQ handle */
 const struct sfc_dp_tx *sfc_dp_tx_by_dp_txq(const struct sfc_dp_txq *dp_txq);
 
+static inline uint64_t
+sfc_dp_tx_offload_capa(const struct sfc_dp_tx *dp_tx)
+{
+	return dp_tx->dev_offload_capa | dp_tx->queue_offload_capa;
+}
+
 static inline int
-sfc_dp_tx_prepare_pkt(struct rte_mbuf *m)
+sfc_dp_tx_prepare_pkt(struct rte_mbuf *m,
+			   uint32_t tso_tcp_header_offset_limit,
+			   unsigned int max_fill_level,
+			   unsigned int nb_tso_descs,
+			   unsigned int nb_vlan_descs)
 {
+	unsigned int descs_required = m->nb_segs;
+
 #ifdef RTE_LIBRTE_SFC_EFX_DEBUG
 	int ret;
 
@@ -209,10 +227,62 @@ sfc_dp_tx_prepare_pkt(struct rte_mbuf *m)
 		SFC_ASSERT(ret < 0);
 		return -ret;
 	}
-#else
-	RTE_SET_USED(m);
 #endif
 
+	if (m->ol_flags & PKT_TX_TCP_SEG) {
+		unsigned int tcph_off = m->l2_len + m->l3_len;
+		unsigned int header_len;
+
+		switch (m->ol_flags & PKT_TX_TUNNEL_MASK) {
+		case 0:
+			break;
+		case PKT_TX_TUNNEL_VXLAN:
+			/* FALLTHROUGH */
+		case PKT_TX_TUNNEL_GENEVE:
+			if (!(m->ol_flags &
+			      (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6)))
+				return EINVAL;
+
+			tcph_off += m->outer_l2_len + m->outer_l3_len;
+		}
+
+		header_len = tcph_off + m->l4_len;
+
+		if (unlikely(tcph_off > tso_tcp_header_offset_limit))
+			return EINVAL;
+
+		descs_required += nb_tso_descs;
+
+		/*
+		 * Extra descriptor that is required when a packet header
+		 * is separated from remaining content of the first segment.
+		 */
+		if (rte_pktmbuf_data_len(m) > header_len) {
+			descs_required++;
+		} else if (rte_pktmbuf_data_len(m) < header_len &&
+			 unlikely(header_len > SFC_TSOH_STD_LEN)) {
+			/*
+			 * Header linearization is required and
+			 * the header is too big to be linearized
+			 */
+			return EINVAL;
+		}
+	}
+
+	/*
+	 * The number of VLAN descriptors is added regardless of requested
+	 * VLAN offload since VLAN is sticky and sending packet without VLAN
+	 * insertion may require VLAN descriptor to reset the sticky to 0.
+	 */
+	descs_required += nb_vlan_descs;
+
+	/*
+	 * Max fill level must be sufficient to hold all required descriptors
+	 * to send the packet entirely.
+	 */
+	if (descs_required > max_fill_level)
+		return ENOBUFS;
+
 	return 0;
 }