en_tx.c | Explore in Territory

/*
 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include <asm/page.h>
#include <linux/mlx4/cq.h>
#include <linux/slab.h>
#include <linux/mlx4/qp.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/prefetch.h>
#include <linux/vmalloc.h>
#include <linux/tcp.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/indirect_call_wrapper.h>
#include <net/ipv6.h>

#include "mlx4_en.h"

int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv,
			   struct mlx4_en_tx_ring **pring, u32 size,
			   u16 stride, int node, int queue_index)
{ … }

void mlx4_en_destroy_tx_ring(struct mlx4_en_priv *priv,
			     struct mlx4_en_tx_ring **pring)
{ … }

int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv,
			     struct mlx4_en_tx_ring *ring,
			     int cq, int user_prio)
{ … }

void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv *priv,
				struct mlx4_en_tx_ring *ring)
{ … }

static inline bool mlx4_en_is_tx_ring_full(struct mlx4_en_tx_ring *ring)
{ … }

static void mlx4_en_stamp_wqe(struct mlx4_en_priv *priv,
			      struct mlx4_en_tx_ring *ring, int index,
			      u8 owner)
{ … }

INDIRECT_CALLABLE_DECLARE(…);

u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv,
			 struct mlx4_en_tx_ring *ring,
			 int index, u64 timestamp,
			 int napi_mode)
{ … }

INDIRECT_CALLABLE_DECLARE(…);

u32 mlx4_en_recycle_tx_desc(struct mlx4_en_priv *priv,
			    struct mlx4_en_tx_ring *ring,
			    int index, u64 timestamp,
			    int napi_mode)
{ … }

int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring)
{ … }

static void mlx4_en_handle_err_cqe(struct mlx4_en_priv *priv, struct mlx4_err_cqe *err_cqe,
				   u16 cqe_index, struct mlx4_en_tx_ring *ring)
{ … }

int mlx4_en_process_tx_cq(struct net_device *dev,
			  struct mlx4_en_cq *cq, int napi_budget)
{ … }

void mlx4_en_tx_irq(struct mlx4_cq *mcq)
{ … }

/* TX CQ polling - called by NAPI */
int mlx4_en_poll_tx_cq(struct napi_struct *napi, int budget)
{ … }

static struct mlx4_en_tx_desc *mlx4_en_bounce_to_desc(struct mlx4_en_priv *priv,
						      struct mlx4_en_tx_ring *ring,
						      u32 index,
						      unsigned int desc_size)
{ … }

/* Decide if skb can be inlined in tx descriptor to avoid dma mapping
 *
 * It seems strange we do not simply use skb_copy_bits().
 * This would allow to inline all skbs iff skb->len <= inline_thold
 *
 * Note that caller already checked skb was not a gso packet
 */
static bool is_inline(int inline_thold, const struct sk_buff *skb,
		      const struct skb_shared_info *shinfo,
		      void **pfrag)
{ … }

static int inline_size(const struct sk_buff *skb)
{ … }

static int get_real_size(const struct sk_buff *skb,
			 const struct skb_shared_info *shinfo,
			 struct net_device *dev,
			 int *lso_header_size,
			 bool *inline_ok,
			 void **pfrag,
			 int *hopbyhop)
{ … }

static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc,
			     const struct sk_buff *skb,
			     const struct skb_shared_info *shinfo,
			     void *fragptr)
{ … }

u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb,
			 struct net_device *sb_dev)
{ … }

static void mlx4_bf_copy(void __iomem *dst, const void *src,
			 unsigned int bytecnt)
{ … }

void mlx4_en_xmit_doorbell(struct mlx4_en_tx_ring *ring)
{ … }

static void mlx4_en_tx_write_desc(struct mlx4_en_tx_ring *ring,
				  struct mlx4_en_tx_desc *tx_desc,
				  union mlx4_wqe_qpn_vlan qpn_vlan,
				  int desc_size, int bf_index,
				  __be32 op_own, bool bf_ok,
				  bool send_doorbell)
{ … }

static bool mlx4_en_build_dma_wqe(struct mlx4_en_priv *priv,
				  struct skb_shared_info *shinfo,
				  struct mlx4_wqe_data_seg *data,
				  struct sk_buff *skb,
				  int lso_header_size,
				  __be32 mr_key,
				  struct mlx4_en_tx_info *tx_info)
{ … }

netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
{ … }

#define MLX4_EN_XDP_TX_NRTXBB …
#define MLX4_EN_XDP_TX_REAL_SZ …

void mlx4_en_init_tx_xdp_ring_descs(struct mlx4_en_priv *priv,
				    struct mlx4_en_tx_ring *ring)
{ … }

netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_ring *rx_ring,
			       struct mlx4_en_rx_alloc *frame,
			       struct mlx4_en_priv *priv, unsigned int length,
			       int tx_ind, bool *doorbell_pending)
{ … }
linux/drivers/net/ethernet/mellanox/mlx4/en_tx.c
