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linux-stable/drivers/net/mlx4/mlx4_en.h
Yevgeny Petrilin 0314db69d7 mlx4_en: Remove redundant refill code on RX 
Our RX rings are always full, there is no need to check whether
we need to fill them or not. If we fail to allocate a new socket
buffer, the incoming packet is dropped an the ring remains full.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-21 19:18:07 -07:00

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/*
* 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.
*
*/
#ifndef _MLX4_EN_H_
#define _MLX4_EN_H_
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/inet_lro.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/qp.h>
#include <linux/mlx4/cq.h>
#include <linux/mlx4/srq.h>
#include <linux/mlx4/doorbell.h>
#include "en_port.h"
#define DRV_NAME "mlx4_en"
#define DRV_VERSION "1.4.1.1"
#define DRV_RELDATE "June 2009"
#define MLX4_EN_MSG_LEVEL (NETIF_MSG_LINK | NETIF_MSG_IFDOWN)
#define en_print(level, priv, format, arg...) \
{ \
if ((priv)->registered) \
printk(level "%s: %s: " format, DRV_NAME, \
(priv->dev)->name, ## arg); \
else \
printk(level "%s: %s: Port %d: " format, \
DRV_NAME, dev_name(&priv->mdev->pdev->dev), \
(priv)->port, ## arg); \
}
#define en_dbg(mlevel, priv, format, arg...) \
{ \
if (NETIF_MSG_##mlevel & priv->msg_enable) \
en_print(KERN_DEBUG, priv, format, ## arg) \
}
#define en_warn(priv, format, arg...) \
en_print(KERN_WARNING, priv, format, ## arg)
#define en_err(priv, format, arg...) \
en_print(KERN_ERR, priv, format, ## arg)
#define mlx4_err(mdev, format, arg...) \
printk(KERN_ERR "%s %s: " format , DRV_NAME ,\
dev_name(&mdev->pdev->dev) , ## arg)
#define mlx4_info(mdev, format, arg...) \
printk(KERN_INFO "%s %s: " format , DRV_NAME ,\
dev_name(&mdev->pdev->dev) , ## arg)
#define mlx4_warn(mdev, format, arg...) \
printk(KERN_WARNING "%s %s: " format , DRV_NAME ,\
dev_name(&mdev->pdev->dev) , ## arg)
/*
* Device constants
*/
#define MLX4_EN_PAGE_SHIFT 12
#define MLX4_EN_PAGE_SIZE (1 << MLX4_EN_PAGE_SHIFT)
#define MAX_TX_RINGS 16
#define MAX_RX_RINGS 16
#define MAX_RSS_MAP_SIZE 64
#define RSS_FACTOR 2
#define TXBB_SIZE 64
#define HEADROOM (2048 / TXBB_SIZE + 1)
#define STAMP_STRIDE 64
#define STAMP_DWORDS (STAMP_STRIDE / 4)
#define STAMP_SHIFT 31
#define STAMP_VAL 0x7fffffff
#define STATS_DELAY (HZ / 4)
/* Typical TSO descriptor with 16 gather entries is 352 bytes... */
#define MAX_DESC_SIZE 512
#define MAX_DESC_TXBBS (MAX_DESC_SIZE / TXBB_SIZE)
/*
* OS related constants and tunables
*/
#define MLX4_EN_WATCHDOG_TIMEOUT (15 * HZ)
#define MLX4_EN_ALLOC_ORDER 2
#define MLX4_EN_ALLOC_SIZE (PAGE_SIZE << MLX4_EN_ALLOC_ORDER)
#define MLX4_EN_MAX_LRO_DESCRIPTORS 32
/* Receive fragment sizes; we use at most 4 fragments (for 9600 byte MTU
* and 4K allocations) */
enum {
FRAG_SZ0 = 512 - NET_IP_ALIGN,
FRAG_SZ1 = 1024,
FRAG_SZ2 = 4096,
FRAG_SZ3 = MLX4_EN_ALLOC_SIZE
};
#define MLX4_EN_MAX_RX_FRAGS 4
/* Maximum ring sizes */
#define MLX4_EN_MAX_TX_SIZE 8192
#define MLX4_EN_MAX_RX_SIZE 8192
/* Minimum ring size for our page-allocation sceme to work */
#define MLX4_EN_MIN_RX_SIZE (MLX4_EN_ALLOC_SIZE / SMP_CACHE_BYTES)
#define MLX4_EN_MIN_TX_SIZE (4096 / TXBB_SIZE)
#define MLX4_EN_SMALL_PKT_SIZE 64
#define MLX4_EN_NUM_TX_RINGS 8
#define MLX4_EN_NUM_PPP_RINGS 8
#define MLX4_EN_DEF_TX_RING_SIZE 512
#define MLX4_EN_DEF_RX_RING_SIZE 1024
/* Target number of packets to coalesce with interrupt moderation */
#define MLX4_EN_RX_COAL_TARGET 44
#define MLX4_EN_RX_COAL_TIME 0x10
#define MLX4_EN_TX_COAL_PKTS 5
#define MLX4_EN_TX_COAL_TIME 0x80
#define MLX4_EN_RX_RATE_LOW 400000
#define MLX4_EN_RX_COAL_TIME_LOW 0
#define MLX4_EN_RX_RATE_HIGH 450000
#define MLX4_EN_RX_COAL_TIME_HIGH 128
#define MLX4_EN_RX_SIZE_THRESH 1024
#define MLX4_EN_RX_RATE_THRESH (1000000 / MLX4_EN_RX_COAL_TIME_HIGH)
#define MLX4_EN_SAMPLE_INTERVAL 0
#define MLX4_EN_AUTO_CONF 0xffff
#define MLX4_EN_DEF_RX_PAUSE 1
#define MLX4_EN_DEF_TX_PAUSE 1
/* Interval between sucessive polls in the Tx routine when polling is used
instead of interrupts (in per-core Tx rings) - should be power of 2 */
#define MLX4_EN_TX_POLL_MODER 16
#define MLX4_EN_TX_POLL_TIMEOUT (HZ / 4)
#define ETH_LLC_SNAP_SIZE 8
#define SMALL_PACKET_SIZE (256 - NET_IP_ALIGN)
#define HEADER_COPY_SIZE (128 - NET_IP_ALIGN)
#define MLX4_EN_MIN_MTU 46
#define ETH_BCAST 0xffffffffffffULL
#ifdef MLX4_EN_PERF_STAT
/* Number of samples to 'average' */
#define AVG_SIZE 128
#define AVG_FACTOR 1024
#define NUM_PERF_STATS NUM_PERF_COUNTERS
#define INC_PERF_COUNTER(cnt) (++(cnt))
#define ADD_PERF_COUNTER(cnt, add) ((cnt) += (add))
#define AVG_PERF_COUNTER(cnt, sample) \
((cnt) = ((cnt) * (AVG_SIZE - 1) + (sample) * AVG_FACTOR) / AVG_SIZE)
#define GET_PERF_COUNTER(cnt) (cnt)
#define GET_AVG_PERF_COUNTER(cnt) ((cnt) / AVG_FACTOR)
#else
#define NUM_PERF_STATS 0
#define INC_PERF_COUNTER(cnt) do {} while (0)
#define ADD_PERF_COUNTER(cnt, add) do {} while (0)
#define AVG_PERF_COUNTER(cnt, sample) do {} while (0)
#define GET_PERF_COUNTER(cnt) (0)
#define GET_AVG_PERF_COUNTER(cnt) (0)
#endif /* MLX4_EN_PERF_STAT */
/*
* Configurables
*/
enum cq_type {
RX = 0,
TX = 1,
};
/*
* Useful macros
*/
#define ROUNDUP_LOG2(x) ilog2(roundup_pow_of_two(x))
#define XNOR(x, y) (!(x) == !(y))
#define ILLEGAL_MAC(addr) (addr == 0xffffffffffffULL || addr == 0x0)
struct mlx4_en_tx_info {
struct sk_buff *skb;
u32 nr_txbb;
u8 linear;
u8 data_offset;
u8 inl;
};
#define MLX4_EN_BIT_DESC_OWN 0x80000000
#define CTRL_SIZE sizeof(struct mlx4_wqe_ctrl_seg)
#define MLX4_EN_MEMTYPE_PAD 0x100
#define DS_SIZE sizeof(struct mlx4_wqe_data_seg)
struct mlx4_en_tx_desc {
struct mlx4_wqe_ctrl_seg ctrl;
union {
struct mlx4_wqe_data_seg data; /* at least one data segment */
struct mlx4_wqe_lso_seg lso;
struct mlx4_wqe_inline_seg inl;
};
};
#define MLX4_EN_USE_SRQ 0x01000000
struct mlx4_en_rx_alloc {
struct page *page;
u16 offset;
};
struct mlx4_en_tx_ring {
struct mlx4_hwq_resources wqres;
u32 size ; /* number of TXBBs */
u32 size_mask;
u16 stride;
u16 cqn; /* index of port CQ associated with this ring */
u32 prod;
u32 cons;
u32 buf_size;
u32 doorbell_qpn;
void *buf;
u16 poll_cnt;
int blocked;
struct mlx4_en_tx_info *tx_info;
u8 *bounce_buf;
u32 last_nr_txbb;
struct mlx4_qp qp;
struct mlx4_qp_context context;
int qpn;
enum mlx4_qp_state qp_state;
struct mlx4_srq dummy;
unsigned long bytes;
unsigned long packets;
spinlock_t comp_lock;
};
struct mlx4_en_rx_desc {
struct mlx4_wqe_srq_next_seg next;
/* actual number of entries depends on rx ring stride */
struct mlx4_wqe_data_seg data[0];
};
struct mlx4_en_rx_ring {
struct mlx4_srq srq;
struct mlx4_hwq_resources wqres;
struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS];
struct net_lro_mgr lro;
u32 size ; /* number of Rx descs*/
u32 actual_size;
u32 size_mask;
u16 stride;
u16 log_stride;
u16 cqn; /* index of port CQ associated with this ring */
u32 prod;
u32 cons;
u32 buf_size;
void *buf;
void *rx_info;
unsigned long bytes;
unsigned long packets;
};
static inline int mlx4_en_can_lro(__be16 status)
{
return (status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
MLX4_CQE_STATUS_IPV4F |
MLX4_CQE_STATUS_IPV6 |
MLX4_CQE_STATUS_IPV4OPT |
MLX4_CQE_STATUS_TCP |
MLX4_CQE_STATUS_UDP |
MLX4_CQE_STATUS_IPOK)) ==
cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
MLX4_CQE_STATUS_IPOK |
MLX4_CQE_STATUS_TCP);
}
struct mlx4_en_cq {
struct mlx4_cq mcq;
struct mlx4_hwq_resources wqres;
int ring;
spinlock_t lock;
struct net_device *dev;
struct napi_struct napi;
/* Per-core Tx cq processing support */
struct timer_list timer;
int size;
int buf_size;
unsigned vector;
enum cq_type is_tx;
u16 moder_time;
u16 moder_cnt;
struct mlx4_cqe *buf;
#define MLX4_EN_OPCODE_ERROR 0x1e
};
struct mlx4_en_port_profile {
u32 flags;
u32 tx_ring_num;
u32 rx_ring_num;
u32 tx_ring_size;
u32 rx_ring_size;
u8 rx_pause;
u8 rx_ppp;
u8 tx_pause;
u8 tx_ppp;
};
struct mlx4_en_profile {
int rss_xor;
int num_lro;
u8 rss_mask;
u32 active_ports;
u32 small_pkt_int;
u8 no_reset;
struct mlx4_en_port_profile prof[MLX4_MAX_PORTS + 1];
};
struct mlx4_en_dev {
struct mlx4_dev *dev;
struct pci_dev *pdev;
struct mutex state_lock;
struct net_device *pndev[MLX4_MAX_PORTS + 1];
u32 port_cnt;
bool device_up;
struct mlx4_en_profile profile;
u32 LSO_support;
struct workqueue_struct *workqueue;
struct device *dma_device;
void __iomem *uar_map;
struct mlx4_uar priv_uar;
struct mlx4_mr mr;
u32 priv_pdn;
spinlock_t uar_lock;
};
struct mlx4_en_rss_map {
int size;
int base_qpn;
u16 map[MAX_RSS_MAP_SIZE];
struct mlx4_qp qps[MAX_RSS_MAP_SIZE];
enum mlx4_qp_state state[MAX_RSS_MAP_SIZE];
struct mlx4_qp indir_qp;
enum mlx4_qp_state indir_state;
};
struct mlx4_en_rss_context {
__be32 base_qpn;
__be32 default_qpn;
u16 reserved;
u8 hash_fn;
u8 flags;
__be32 rss_key[10];
};
struct mlx4_en_pkt_stats {
unsigned long broadcast;
unsigned long rx_prio[8];
unsigned long tx_prio[8];
#define NUM_PKT_STATS 17
};
struct mlx4_en_port_stats {
unsigned long lro_aggregated;
unsigned long lro_flushed;
unsigned long lro_no_desc;
unsigned long tso_packets;
unsigned long queue_stopped;
unsigned long wake_queue;
unsigned long tx_timeout;
unsigned long rx_alloc_failed;
unsigned long rx_chksum_good;
unsigned long rx_chksum_none;
unsigned long tx_chksum_offload;
#define NUM_PORT_STATS 11
};
struct mlx4_en_perf_stats {
u32 tx_poll;
u64 tx_pktsz_avg;
u32 inflight_avg;
u16 tx_coal_avg;
u16 rx_coal_avg;
u32 napi_quota;
#define NUM_PERF_COUNTERS 6
};
struct mlx4_en_frag_info {
u16 frag_size;
u16 frag_prefix_size;
u16 frag_stride;
u16 frag_align;
u16 last_offset;
};
struct mlx4_en_priv {
struct mlx4_en_dev *mdev;
struct mlx4_en_port_profile *prof;
struct net_device *dev;
struct vlan_group *vlgrp;
struct net_device_stats stats;
struct net_device_stats ret_stats;
spinlock_t stats_lock;
unsigned long last_moder_packets;
unsigned long last_moder_tx_packets;
unsigned long last_moder_bytes;
unsigned long last_moder_jiffies;
int last_moder_time;
u16 rx_usecs;
u16 rx_frames;
u16 tx_usecs;
u16 tx_frames;
u32 pkt_rate_low;
u16 rx_usecs_low;
u32 pkt_rate_high;
u16 rx_usecs_high;
u16 sample_interval;
u16 adaptive_rx_coal;
u32 msg_enable;
struct mlx4_hwq_resources res;
int link_state;
int last_link_state;
bool port_up;
int port;
int registered;
int allocated;
int stride;
int rx_csum;
u64 mac;
int mac_index;
unsigned max_mtu;
int base_qpn;
struct mlx4_en_rss_map rss_map;
u32 flags;
#define MLX4_EN_FLAG_PROMISC 0x1
u32 tx_ring_num;
u32 rx_ring_num;
u32 rx_skb_size;
struct mlx4_en_frag_info frag_info[MLX4_EN_MAX_RX_FRAGS];
u16 num_frags;
u16 log_rx_info;
struct mlx4_en_tx_ring tx_ring[MAX_TX_RINGS];
struct mlx4_en_rx_ring rx_ring[MAX_RX_RINGS];
struct mlx4_en_cq tx_cq[MAX_TX_RINGS];
struct mlx4_en_cq rx_cq[MAX_RX_RINGS];
struct work_struct mcast_task;
struct work_struct mac_task;
struct work_struct watchdog_task;
struct work_struct linkstate_task;
struct delayed_work stats_task;
struct mlx4_en_perf_stats pstats;
struct mlx4_en_pkt_stats pkstats;
struct mlx4_en_port_stats port_stats;
struct dev_mc_list *mc_list;
struct mlx4_en_stat_out_mbox hw_stats;
};
void mlx4_en_destroy_netdev(struct net_device *dev);
int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
struct mlx4_en_port_profile *prof);
int mlx4_en_start_port(struct net_device *dev);
void mlx4_en_stop_port(struct net_device *dev);
void mlx4_en_free_resources(struct mlx4_en_priv *priv);
int mlx4_en_alloc_resources(struct mlx4_en_priv *priv);
int mlx4_en_create_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
int entries, int ring, enum cq_type mode);
void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
void mlx4_en_poll_tx_cq(unsigned long data);
void mlx4_en_tx_irq(struct mlx4_cq *mcq);
u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb);
int mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev);
int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv, struct mlx4_en_tx_ring *ring,
u32 size, u16 stride);
void mlx4_en_destroy_tx_ring(struct mlx4_en_priv *priv, struct mlx4_en_tx_ring *ring);
int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv,
struct mlx4_en_tx_ring *ring,
int cq, int srqn);
void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv *priv,
struct mlx4_en_tx_ring *ring);
int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring,
u32 size, u16 stride);
void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring);
int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv);
void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring);
int mlx4_en_process_rx_cq(struct net_device *dev,
struct mlx4_en_cq *cq,
int budget);
int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget);
void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
int is_tx, int rss, int qpn, int cqn, int srqn,
struct mlx4_qp_context *context);
void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event);
int mlx4_en_map_buffer(struct mlx4_buf *buf);
void mlx4_en_unmap_buffer(struct mlx4_buf *buf);
void mlx4_en_calc_rx_buf(struct net_device *dev);
void mlx4_en_set_default_rss_map(struct mlx4_en_priv *priv,
struct mlx4_en_rss_map *rss_map,
int num_entries, int num_rings);
int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv);
void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv);
int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring);
void mlx4_en_rx_irq(struct mlx4_cq *mcq);
int mlx4_SET_MCAST_FLTR(struct mlx4_dev *dev, u8 port, u64 mac, u64 clear, u8 mode);
int mlx4_SET_VLAN_FLTR(struct mlx4_dev *dev, u8 port, struct vlan_group *grp);
int mlx4_SET_PORT_general(struct mlx4_dev *dev, u8 port, int mtu,
u8 pptx, u8 pfctx, u8 pprx, u8 pfcrx);
int mlx4_SET_PORT_qpn_calc(struct mlx4_dev *dev, u8 port, u32 base_qpn,
u8 promisc);
int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset);
/*
* Globals
*/
extern const struct ethtool_ops mlx4_en_ethtool_ops;
#endif
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