X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fsfc%2Fsfc_dp_tx.h;h=7105d270bb6ac6b0653eae77bfe6409623f8d86d;hb=2e2e5bdf908ef7ce6ba7a33be5bec6f42f4a39fe;hp=a075612c78a2336ef713015c94dd2c73b5740669;hpb=714bff55a4f2ee1978ae4b71c4d0b36eab1a7e29;p=dpdk.git

diff --git a/drivers/net/sfc/sfc_dp_tx.h b/drivers/net/sfc/sfc_dp_tx.h
index a075612c78..7105d270bb 100644
--- a/drivers/net/sfc/sfc_dp_tx.h
+++ b/drivers/net/sfc/sfc_dp_tx.h
@@ -13,6 +13,8 @@
 #include <rte_ethdev_driver.h>
 
 #include "sfc_dp.h"
+#include "sfc_debug.h"
+#include "sfc_tso.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -27,6 +29,12 @@ struct sfc_dp_txq {
 	struct sfc_dp_queue	dpq;
 };
 
+/** Datapath transmit queue descriptor number limitations */
+struct sfc_dp_tx_hw_limits {
+	unsigned int txq_max_entries;
+	unsigned int txq_min_entries;
+};
+
 /**
  * Datapath transmit queue creation information.
  *
@@ -39,8 +47,6 @@ struct sfc_dp_tx_qcreate_info {
 	unsigned int		max_fill_level;
 	/** Minimum number of unused Tx descriptors to do reap */
 	unsigned int		free_thresh;
-	/** Transmit queue configuration flags */
-	unsigned int		flags;
 	/** Offloads enabled on the transmit queue */
 	uint64_t		offloads;
 	/** Tx queue size */
@@ -59,6 +65,11 @@ struct sfc_dp_tx_qcreate_info {
 	volatile void		*mem_bar;
 	/** VI window size shift */
 	unsigned int		vi_window_shift;
+	/**
+	 * Maximum number of bytes into the packet the TCP header can start for
+	 * the hardware to apply TSO packet edits.
+	 */
+	uint16_t		tso_tcp_header_offset_limit;
 };
 
 /**
@@ -80,6 +91,7 @@ typedef void (sfc_dp_tx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
  * @return 0 or positive errno.
  */
 typedef int (sfc_dp_tx_qsize_up_rings_t)(uint16_t nb_tx_desc,
+					 struct sfc_dp_tx_hw_limits *limits,
 					 unsigned int *txq_entries,
 					 unsigned int *evq_entries,
 					 unsigned int *txq_max_fill_level);
@@ -145,12 +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;
@@ -160,6 +177,7 @@ struct sfc_dp_tx {
 	sfc_dp_tx_qtx_ev_t		*qtx_ev;
 	sfc_dp_tx_qreap_t		*qreap;
 	sfc_dp_tx_qdesc_status_t	*qdesc_status;
+	eth_tx_prep_t			pkt_prepare;
 	eth_tx_burst_t			pkt_burst;
 };
 
@@ -179,6 +197,95 @@ sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
 	return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
 }
 
+/** 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,
+			   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;
+
+	ret = rte_validate_tx_offload(m);
+	if (ret != 0) {
+		/*
+		 * Negative error code is returned by rte_validate_tx_offload(),
+		 * but positive are used inside net/sfc PMD.
+		 */
+		SFC_ASSERT(ret < 0);
+		return -ret;
+	}
+#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;
+}
+
 extern struct sfc_dp_tx sfc_efx_tx;
 extern struct sfc_dp_tx sfc_ef10_tx;
 extern struct sfc_dp_tx sfc_ef10_simple_tx;