drivers/net/mlx4/mlx4_en.h - android_kernel_htc_msm8960 - Gitiles

 /*
  * 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/mlx4/device.h>
 #include <linux/mlx4/qp.h>
 #include <linux/mlx4/cq.h>
 #include <linux/mlx4/srq.h>
 #include <linux/mlx4/doorbell.h>
 #include <linux/mlx4/cmd.h>

 #include "en_port.h"

 #define DRV_NAME	"mlx4_en"
 #define DRV_VERSION	"1.5.4.1"
 #define DRV_RELDATE	"March 2011"

 #define MLX4_EN_MSG_LEVEL	(NETIF_MSG_LINK | NETIF_MSG_IFDOWN)

 /*
  * Device constants
  */


 #define MLX4_EN_PAGE_SHIFT	12
 #define MLX4_EN_PAGE_SIZE	(1 << MLX4_EN_PAGE_SHIFT)
 #define MAX_RX_RINGS		16
 #define MIN_RX_RINGS		4
 #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 MAX_TX_RINGS			(MLX4_EN_NUM_TX_RINGS + MLX4_EN_NUM_PPP_RINGS)
 #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_AVG_PKT_SMALL		256

 #define MLX4_EN_AUTO_CONF	0xffff

 #define MLX4_EN_DEF_RX_PAUSE	1
 #define MLX4_EN_DEF_TX_PAUSE	1

 /* Interval between successive 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_LOOPBACK_TEST_PAYLOAD (HEADER_COPY_SIZE - ETH_HLEN)

 #define MLX4_EN_MIN_MTU		46
 #define ETH_BCAST		0xffffffffffffULL

 #define MLX4_EN_LOOPBACK_RETRIES	5
 #define MLX4_EN_LOOPBACK_TIMEOUT	100

 #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

 #define MLX4_EN_CX3_LOW_ID	0x1000
 #define MLX4_EN_CX3_HIGH_ID	0x1005

 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_bf bf;
 	bool bf_enabled;
 };

 struct mlx4_en_rx_desc {
 	/* actual number of entries depends on rx ring stride */
 	struct mlx4_wqe_data_seg data[0];
 };

 struct mlx4_en_rx_ring {
 	struct mlx4_hwq_resources wqres;
 	struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS];
 	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 tcp_rss;
 	int udp_rss;
 	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;
 	u8			mac_removed[MLX4_MAX_PORTS + 1];
 };


 struct mlx4_en_rss_map {
 	int base_qpn;
 	struct mlx4_qp qps[MAX_RX_RINGS];
 	enum mlx4_qp_state state[MAX_RX_RINGS];
 	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];
 	__be32 base_qpn_udp;
 };

 struct mlx4_en_port_state {
 	int link_state;
 	int link_speed;
 	int transciver;
 };

 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 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		8
 };

 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;
 	struct mlx4_en_port_state port_state;
 	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;
 	u32 loopback_ok;
 	u32 validate_loopback;

 	struct mlx4_hwq_resources res;
 	int link_state;
 	int last_link_state;
 	bool port_up;
 	int port;
 	int registered;
 	int allocated;
 	int stride;
 	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
 #define MLX4_EN_FLAG_MC_PROMISC	0x2
 	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];
 	int tx_vector;
 	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;
 	char *mc_addrs;
 	int mc_addrs_cnt;
 	struct mlx4_en_stat_out_mbox hw_stats;
 	int vids[128];
 	bool wol;
 };

 enum mlx4_en_wol {
 	MLX4_EN_WOL_MAGIC = (1ULL << 61),
 	MLX4_EN_WOL_ENABLED = (1ULL << 62),
 	MLX4_EN_WOL_DO_MODIFY = (1ULL << 63),
 };


 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, bool reserve_vectors);
 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,
 			bool reserve_vectors);
 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);
 netdev_tx_t 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,
 			   int qpn, 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);
 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,
 			     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);
 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);
 int mlx4_en_QUERY_PORT(struct mlx4_en_dev *mdev, u8 port);

 #define MLX4_EN_NUM_SELF_TEST	5
 void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf);
 u64 mlx4_en_mac_to_u64(u8 *addr);

 /*
  * Globals
  */
 extern const struct ethtool_ops mlx4_en_ethtool_ops;


 /*
  * printk / logging functions
  */

 int en_print(const char *level, const struct mlx4_en_priv *priv,
 	     const char *format, ...) __attribute__ ((format (printf, 3, 4)));

 #define en_dbg(mlevel, priv, format, arg...)			\
 do {								\
 	if (NETIF_MSG_##mlevel & priv->msg_enable)		\
 		en_print(KERN_DEBUG, priv, format, ##arg);	\
 } while (0)
 #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 en_info(priv, format, arg...)			\
 	en_print(KERN_INFO, priv, format, ## arg)

 #define mlx4_err(mdev, format, arg...)			\
 	pr_err("%s %s: " format, DRV_NAME,		\
 	       dev_name(&mdev->pdev->dev), ##arg)
 #define mlx4_info(mdev, format, arg...)			\
 	pr_info("%s %s: " format, DRV_NAME,		\
 		dev_name(&mdev->pdev->dev), ##arg)
 #define mlx4_warn(mdev, format, arg...)			\
 	pr_warning("%s %s: " format, DRV_NAME,		\
 		   dev_name(&mdev->pdev->dev), ##arg)

 #endif
	/*
	* 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/mlx4/device.h>
	#include <linux/mlx4/qp.h>
	#include <linux/mlx4/cq.h>
	#include <linux/mlx4/srq.h>
	#include <linux/mlx4/doorbell.h>
	#include <linux/mlx4/cmd.h>

	#include "en_port.h"

	#define DRV_NAME "mlx4_en"
	#define DRV_VERSION "1.5.4.1"
	#define DRV_RELDATE "March 2011"

	#define MLX4_EN_MSG_LEVEL (NETIF_MSG_LINK \| NETIF_MSG_IFDOWN)

	/*
	* Device constants
	*/


	#define MLX4_EN_PAGE_SHIFT 12
	#define MLX4_EN_PAGE_SIZE (1 << MLX4_EN_PAGE_SHIFT)
	#define MAX_RX_RINGS 16
	#define MIN_RX_RINGS 4
	#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 MAX_TX_RINGS (MLX4_EN_NUM_TX_RINGS + MLX4_EN_NUM_PPP_RINGS)
	#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_AVG_PKT_SMALL 256

	#define MLX4_EN_AUTO_CONF 0xffff

	#define MLX4_EN_DEF_RX_PAUSE 1
	#define MLX4_EN_DEF_TX_PAUSE 1

	/* Interval between successive 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_LOOPBACK_TEST_PAYLOAD (HEADER_COPY_SIZE - ETH_HLEN)

	#define MLX4_EN_MIN_MTU 46
	#define ETH_BCAST 0xffffffffffffULL

	#define MLX4_EN_LOOPBACK_RETRIES 5
	#define MLX4_EN_LOOPBACK_TIMEOUT 100

	#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

	#define MLX4_EN_CX3_LOW_ID 0x1000
	#define MLX4_EN_CX3_HIGH_ID 0x1005

	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_bf bf;
	bool bf_enabled;
	};

	struct mlx4_en_rx_desc {
	/* actual number of entries depends on rx ring stride */
	struct mlx4_wqe_data_seg data[0];
	};

	struct mlx4_en_rx_ring {
	struct mlx4_hwq_resources wqres;
	struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS];
	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 tcp_rss;
	int udp_rss;
	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;
	u8 mac_removed[MLX4_MAX_PORTS + 1];
	};


	struct mlx4_en_rss_map {
	int base_qpn;
	struct mlx4_qp qps[MAX_RX_RINGS];
	enum mlx4_qp_state state[MAX_RX_RINGS];
	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];
	__be32 base_qpn_udp;
	};

	struct mlx4_en_port_state {
	int link_state;
	int link_speed;
	int transciver;
	};

	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 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 8
	};

	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;
	struct mlx4_en_port_state port_state;
	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;
	u32 loopback_ok;
	u32 validate_loopback;

	struct mlx4_hwq_resources res;
	int link_state;
	int last_link_state;
	bool port_up;
	int port;
	int registered;
	int allocated;
	int stride;
	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
	#define MLX4_EN_FLAG_MC_PROMISC 0x2
	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];
	int tx_vector;
	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;
	char *mc_addrs;
	int mc_addrs_cnt;
	struct mlx4_en_stat_out_mbox hw_stats;
	int vids[128];
	bool wol;
	};

	enum mlx4_en_wol {
	MLX4_EN_WOL_MAGIC = (1ULL << 61),
	MLX4_EN_WOL_ENABLED = (1ULL << 62),
	MLX4_EN_WOL_DO_MODIFY = (1ULL << 63),
	};


	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, bool reserve_vectors);
	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,
	bool reserve_vectors);
	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);
	netdev_tx_t 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,
	int qpn, 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);
	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,
	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);
	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);
	int mlx4_en_QUERY_PORT(struct mlx4_en_dev *mdev, u8 port);

	#define MLX4_EN_NUM_SELF_TEST 5
	void mlx4_en_ex_selftest(struct net_device dev, u32 flags, u64 *buf);
	u64 mlx4_en_mac_to_u64(u8 *addr);

	/*
	* Globals
	*/
	extern const struct ethtool_ops mlx4_en_ethtool_ops;



	/*
	* printk / logging functions
	*/

	int en_print(const char level, const struct mlx4_en_priv priv,
	const char *format, ...) __attribute__ ((format (printf, 3, 4)));

	#define en_dbg(mlevel, priv, format, arg...) \
	do { \
	if (NETIF_MSG_##mlevel & priv->msg_enable) \
	en_print(KERN_DEBUG, priv, format, ##arg); \
	} while (0)
	#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 en_info(priv, format, arg...) \
	en_print(KERN_INFO, priv, format, ## arg)

	#define mlx4_err(mdev, format, arg...) \
	pr_err("%s %s: " format, DRV_NAME, \
	dev_name(&mdev->pdev->dev), ##arg)
	#define mlx4_info(mdev, format, arg...) \
	pr_info("%s %s: " format, DRV_NAME, \
	dev_name(&mdev->pdev->dev), ##arg)
	#define mlx4_warn(mdev, format, arg...) \
	pr_warning("%s %s: " format, DRV_NAME, \
	dev_name(&mdev->pdev->dev), ##arg)

	#endif