drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2003-2010 Chelsio Communications, Inc. 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 __CXGB4_H__
#define __CXGB4_H__

#include "t4_hw.h"

#include <linux/bitops.h>
#include <linux/cache.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
#include <asm/io.h>
#include "cxgb4_uld.h"

#define T4FW_VERSION_MAJOR 0x01
#define T4FW_VERSION_MINOR 0x09
#define T4FW_VERSION_MICRO 0x17
#define T4FW_VERSION_BUILD 0x00

#define T5FW_VERSION_MAJOR 0x01
#define T5FW_VERSION_MINOR 0x09
#define T5FW_VERSION_MICRO 0x17
#define T5FW_VERSION_BUILD 0x00

#define CH_WARN(adap, fmt, ...) dev_warn(adap->pdev_dev, fmt, ## __VA_ARGS__)

enum {
	MAX_NPORTS = 4,     /* max # of ports */
	SERNUM_LEN = 24,    /* Serial # length */
	EC_LEN     = 16,    /* E/C length */
	ID_LEN     = 16,    /* ID length */
	PN_LEN     = 16,    /* Part Number length */
};

enum {
	MEM_EDC0,
	MEM_EDC1,
	MEM_MC,
	MEM_MC0 = MEM_MC,
	MEM_MC1
};

enum {
	MEMWIN0_APERTURE = 2048,
	MEMWIN0_BASE     = 0x1b800,
	MEMWIN1_APERTURE = 32768,
	MEMWIN1_BASE     = 0x28000,
	MEMWIN1_BASE_T5  = 0x52000,
	MEMWIN2_APERTURE = 65536,
	MEMWIN2_BASE     = 0x30000,
	MEMWIN2_BASE_T5  = 0x54000,
};

enum dev_master {
	MASTER_CANT,
	MASTER_MAY,
	MASTER_MUST
};

enum dev_state {
	DEV_STATE_UNINIT,
	DEV_STATE_INIT,
	DEV_STATE_ERR
};

enum {
	PAUSE_RX      = 1 << 0,
	PAUSE_TX      = 1 << 1,
	PAUSE_AUTONEG = 1 << 2
};

struct port_stats {
	u64 tx_octets;            /* total # of octets in good frames */
	u64 tx_frames;            /* all good frames */
	u64 tx_bcast_frames;      /* all broadcast frames */
	u64 tx_mcast_frames;      /* all multicast frames */
	u64 tx_ucast_frames;      /* all unicast frames */
	u64 tx_error_frames;      /* all error frames */

	u64 tx_frames_64;         /* # of Tx frames in a particular range */
	u64 tx_frames_65_127;
	u64 tx_frames_128_255;
	u64 tx_frames_256_511;
	u64 tx_frames_512_1023;
	u64 tx_frames_1024_1518;
	u64 tx_frames_1519_max;

	u64 tx_drop;              /* # of dropped Tx frames */
	u64 tx_pause;             /* # of transmitted pause frames */
	u64 tx_ppp0;              /* # of transmitted PPP prio 0 frames */
	u64 tx_ppp1;              /* # of transmitted PPP prio 1 frames */
	u64 tx_ppp2;              /* # of transmitted PPP prio 2 frames */
	u64 tx_ppp3;              /* # of transmitted PPP prio 3 frames */
	u64 tx_ppp4;              /* # of transmitted PPP prio 4 frames */
	u64 tx_ppp5;              /* # of transmitted PPP prio 5 frames */
	u64 tx_ppp6;              /* # of transmitted PPP prio 6 frames */
	u64 tx_ppp7;              /* # of transmitted PPP prio 7 frames */

	u64 rx_octets;            /* total # of octets in good frames */
	u64 rx_frames;            /* all good frames */
	u64 rx_bcast_frames;      /* all broadcast frames */
	u64 rx_mcast_frames;      /* all multicast frames */
	u64 rx_ucast_frames;      /* all unicast frames */
	u64 rx_too_long;          /* # of frames exceeding MTU */
	u64 rx_jabber;            /* # of jabber frames */
	u64 rx_fcs_err;           /* # of received frames with bad FCS */
	u64 rx_len_err;           /* # of received frames with length error */
	u64 rx_symbol_err;        /* symbol errors */
	u64 rx_runt;              /* # of short frames */

	u64 rx_frames_64;         /* # of Rx frames in a particular range */
	u64 rx_frames_65_127;
	u64 rx_frames_128_255;
	u64 rx_frames_256_511;
	u64 rx_frames_512_1023;
	u64 rx_frames_1024_1518;
	u64 rx_frames_1519_max;

	u64 rx_pause;             /* # of received pause frames */
	u64 rx_ppp0;              /* # of received PPP prio 0 frames */
	u64 rx_ppp1;              /* # of received PPP prio 1 frames */
	u64 rx_ppp2;              /* # of received PPP prio 2 frames */
	u64 rx_ppp3;              /* # of received PPP prio 3 frames */
	u64 rx_ppp4;              /* # of received PPP prio 4 frames */
	u64 rx_ppp5;              /* # of received PPP prio 5 frames */
	u64 rx_ppp6;              /* # of received PPP prio 6 frames */
	u64 rx_ppp7;              /* # of received PPP prio 7 frames */

	u64 rx_ovflow0;           /* drops due to buffer-group 0 overflows */
	u64 rx_ovflow1;           /* drops due to buffer-group 1 overflows */
	u64 rx_ovflow2;           /* drops due to buffer-group 2 overflows */
	u64 rx_ovflow3;           /* drops due to buffer-group 3 overflows */
	u64 rx_trunc0;            /* buffer-group 0 truncated packets */
	u64 rx_trunc1;            /* buffer-group 1 truncated packets */
	u64 rx_trunc2;            /* buffer-group 2 truncated packets */
	u64 rx_trunc3;            /* buffer-group 3 truncated packets */
};

struct lb_port_stats {
	u64 octets;
	u64 frames;
	u64 bcast_frames;
	u64 mcast_frames;
	u64 ucast_frames;
	u64 error_frames;

	u64 frames_64;
	u64 frames_65_127;
	u64 frames_128_255;
	u64 frames_256_511;
	u64 frames_512_1023;
	u64 frames_1024_1518;
	u64 frames_1519_max;

	u64 drop;

	u64 ovflow0;
	u64 ovflow1;
	u64 ovflow2;
	u64 ovflow3;
	u64 trunc0;
	u64 trunc1;
	u64 trunc2;
	u64 trunc3;
};

struct tp_tcp_stats {
	u32 tcpOutRsts;
	u64 tcpInSegs;
	u64 tcpOutSegs;
	u64 tcpRetransSegs;
};

struct tp_err_stats {
	u32 macInErrs[4];
	u32 hdrInErrs[4];
	u32 tcpInErrs[4];
	u32 tnlCongDrops[4];
	u32 ofldChanDrops[4];
	u32 tnlTxDrops[4];
	u32 ofldVlanDrops[4];
	u32 tcp6InErrs[4];
	u32 ofldNoNeigh;
	u32 ofldCongDefer;
};

struct tp_params {
	unsigned int ntxchan;        /* # of Tx channels */
	unsigned int tre;            /* log2 of core clocks per TP tick */
	unsigned short tx_modq_map;  /* TX modulation scheduler queue to */
				     /* channel map */

	uint32_t dack_re;            /* DACK timer resolution */
	unsigned short tx_modq[NCHAN];	/* channel to modulation queue map */

	u32 vlan_pri_map;               /* cached TP_VLAN_PRI_MAP */
	u32 ingress_config;             /* cached TP_INGRESS_CONFIG */

	/* TP_VLAN_PRI_MAP Compressed Filter Tuple field offsets.  This is a
	 * subset of the set of fields which may be present in the Compressed
	 * Filter Tuple portion of filters and TCP TCB connections.  The
	 * fields which are present are controlled by the TP_VLAN_PRI_MAP.
	 * Since a variable number of fields may or may not be present, their
	 * shifted field positions within the Compressed Filter Tuple may
	 * vary, or not even be present if the field isn't selected in
	 * TP_VLAN_PRI_MAP.  Since some of these fields are needed in various
	 * places we store their offsets here, or a -1 if the field isn't
	 * present.
	 */
	int vlan_shift;
	int vnic_shift;
	int port_shift;
	int protocol_shift;
};

struct vpd_params {
	unsigned int cclk;
	u8 ec[EC_LEN + 1];
	u8 sn[SERNUM_LEN + 1];
	u8 id[ID_LEN + 1];
	u8 pn[PN_LEN + 1];
};

struct pci_params {
	unsigned char speed;
	unsigned char width;
};

#define CHELSIO_CHIP_CODE(version, revision) (((version) << 4) | (revision))
#define CHELSIO_CHIP_FPGA          0x100
#define CHELSIO_CHIP_VERSION(code) (((code) >> 4) & 0xf)
#define CHELSIO_CHIP_RELEASE(code) ((code) & 0xf)

#define CHELSIO_T4		0x4
#define CHELSIO_T5		0x5

enum chip_type {
	T4_A1 = CHELSIO_CHIP_CODE(CHELSIO_T4, 1),
	T4_A2 = CHELSIO_CHIP_CODE(CHELSIO_T4, 2),
	T4_FIRST_REV	= T4_A1,
	T4_LAST_REV	= T4_A2,

	T5_A0 = CHELSIO_CHIP_CODE(CHELSIO_T5, 0),
	T5_A1 = CHELSIO_CHIP_CODE(CHELSIO_T5, 1),
	T5_FIRST_REV	= T5_A0,
	T5_LAST_REV	= T5_A1,
};

struct adapter_params {
	struct tp_params  tp;
	struct vpd_params vpd;
	struct pci_params pci;

	unsigned int sf_size;             /* serial flash size in bytes */
	unsigned int sf_nsec;             /* # of flash sectors */
	unsigned int sf_fw_start;         /* start of FW image in flash */

	unsigned int fw_vers;
	unsigned int tp_vers;
	u8 api_vers[7];

	unsigned short mtus[NMTUS];
	unsigned short a_wnd[NCCTRL_WIN];
	unsigned short b_wnd[NCCTRL_WIN];

	unsigned char nports;             /* # of ethernet ports */
	unsigned char portvec;
	enum chip_type chip;               /* chip code */
	unsigned char offload;

	unsigned char bypass;

	unsigned int ofldq_wr_cred;
	bool ulptx_memwrite_dsgl;          /* use of T5 DSGL allowed */
};

#include "t4fw_api.h"

#define FW_VERSION(chip) ( \
		FW_HDR_FW_VER_MAJOR_GET(chip##FW_VERSION_MAJOR) | \
		FW_HDR_FW_VER_MINOR_GET(chip##FW_VERSION_MINOR) | \
		FW_HDR_FW_VER_MICRO_GET(chip##FW_VERSION_MICRO) | \
		FW_HDR_FW_VER_BUILD_GET(chip##FW_VERSION_BUILD))
#define FW_INTFVER(chip, intf) (FW_HDR_INTFVER_##intf)

struct fw_info {
	u8 chip;
	char *fs_name;
	char *fw_mod_name;
	struct fw_hdr fw_hdr;
};


struct trace_params {
	u32 data[TRACE_LEN / 4];
	u32 mask[TRACE_LEN / 4];
	unsigned short snap_len;
	unsigned short min_len;
	unsigned char skip_ofst;
	unsigned char skip_len;
	unsigned char invert;
	unsigned char port;
};

struct link_config {
	unsigned short supported;        /* link capabilities */
	unsigned short advertising;      /* advertised capabilities */
	unsigned short requested_speed;  /* speed user has requested */
	unsigned short speed;            /* actual link speed */
	unsigned char  requested_fc;     /* flow control user has requested */
	unsigned char  fc;               /* actual link flow control */
	unsigned char  autoneg;          /* autonegotiating? */
	unsigned char  link_ok;          /* link up? */
};

#define FW_LEN16(fw_struct) FW_CMD_LEN16(sizeof(fw_struct) / 16)

enum {
	MAX_ETH_QSETS = 32,           /* # of Ethernet Tx/Rx queue sets */
	MAX_OFLD_QSETS = 16,          /* # of offload Tx/Rx queue sets */
	MAX_CTRL_QUEUES = NCHAN,      /* # of control Tx queues */
	MAX_RDMA_QUEUES = NCHAN,      /* # of streaming RDMA Rx queues */
};

enum {
	MAX_EGRQ = 128,         /* max # of egress queues, including FLs */
	MAX_INGQ = 64           /* max # of interrupt-capable ingress queues */
};

struct adapter;
struct sge_rspq;

struct port_info {
	struct adapter *adapter;
	u16    viid;
	s16    xact_addr_filt;        /* index of exact MAC address filter */
	u16    rss_size;              /* size of VI's RSS table slice */
	s8     mdio_addr;
	u8     port_type;
	u8     mod_type;
	u8     port_id;
	u8     tx_chan;
	u8     lport;                 /* associated offload logical port */
	u8     nqsets;                /* # of qsets */
	u8     first_qset;            /* index of first qset */
	u8     rss_mode;
	struct link_config link_cfg;
	u16   *rss;
};

struct dentry;
struct work_struct;

enum {                                 /* adapter flags */
	FULL_INIT_DONE     = (1 << 0),
	DEV_ENABLED        = (1 << 1),
	USING_MSI          = (1 << 2),
	USING_MSIX         = (1 << 3),
	FW_OK              = (1 << 4),
	RSS_TNLALLLOOKUP   = (1 << 5),
	USING_SOFT_PARAMS  = (1 << 6),
	MASTER_PF          = (1 << 7),
	FW_OFLD_CONN       = (1 << 9),
};

struct rx_sw_desc;

struct sge_fl {                     /* SGE free-buffer queue state */
	unsigned int avail;         /* # of available Rx buffers */
	unsigned int pend_cred;     /* new buffers since last FL DB ring */
	unsigned int cidx;          /* consumer index */
	unsigned int pidx;          /* producer index */
	unsigned long alloc_failed; /* # of times buffer allocation failed */
	unsigned long large_alloc_failed;
	unsigned long starving;
	/* RO fields */
	unsigned int cntxt_id;      /* SGE context id for the free list */
	unsigned int size;          /* capacity of free list */
	struct rx_sw_desc *sdesc;   /* address of SW Rx descriptor ring */
	__be64 *desc;               /* address of HW Rx descriptor ring */
	dma_addr_t addr;            /* bus address of HW ring start */
};

/* A packet gather list */
struct pkt_gl {
	struct page_frag frags[MAX_SKB_FRAGS];
	void *va;                         /* virtual address of first byte */
	unsigned int nfrags;              /* # of fragments */
	unsigned int tot_len;             /* total length of fragments */
};

typedef int (*rspq_handler_t)(struct sge_rspq *q, const __be64 *rsp,
			      const struct pkt_gl *gl);

struct sge_rspq {                   /* state for an SGE response queue */
	struct napi_struct napi;
	const __be64 *cur_desc;     /* current descriptor in queue */
	unsigned int cidx;          /* consumer index */
	u8 gen;                     /* current generation bit */
	u8 intr_params;             /* interrupt holdoff parameters */
	u8 next_intr_params;        /* holdoff params for next interrupt */
	u8 pktcnt_idx;              /* interrupt packet threshold */
	u8 uld;                     /* ULD handling this queue */
	u8 idx;                     /* queue index within its group */
	int offset;                 /* offset into current Rx buffer */
	u16 cntxt_id;               /* SGE context id for the response q */
	u16 abs_id;                 /* absolute SGE id for the response q */
	__be64 *desc;               /* address of HW response ring */
	dma_addr_t phys_addr;       /* physical address of the ring */
	unsigned int iqe_len;       /* entry size */
	unsigned int size;          /* capacity of response queue */
	struct adapter *adap;
	struct net_device *netdev;  /* associated net device */
	rspq_handler_t handler;
};

struct sge_eth_stats {              /* Ethernet queue statistics */
	unsigned long pkts;         /* # of ethernet packets */
	unsigned long lro_pkts;     /* # of LRO super packets */
	unsigned long lro_merged;   /* # of wire packets merged by LRO */
	unsigned long rx_cso;       /* # of Rx checksum offloads */
	unsigned long vlan_ex;      /* # of Rx VLAN extractions */
	unsigned long rx_drops;     /* # of packets dropped due to no mem */
};

struct sge_eth_rxq {                /* SW Ethernet Rx queue */
	struct sge_rspq rspq;
	struct sge_fl fl;
	struct sge_eth_stats stats;
} ____cacheline_aligned_in_smp;

struct sge_ofld_stats {             /* offload queue statistics */
	unsigned long pkts;         /* # of packets */
	unsigned long imm;          /* # of immediate-data packets */
	unsigned long an;           /* # of asynchronous notifications */
	unsigned long nomem;        /* # of responses deferred due to no mem */
};

struct sge_ofld_rxq {               /* SW offload Rx queue */
	struct sge_rspq rspq;
	struct sge_fl fl;
	struct sge_ofld_stats stats;
} ____cacheline_aligned_in_smp;

struct tx_desc {
	__be64 flit[8];
};

struct tx_sw_desc;

struct sge_txq {
	unsigned int  in_use;       /* # of in-use Tx descriptors */
	unsigned int  size;         /* # of descriptors */
	unsigned int  cidx;         /* SW consumer index */
	unsigned int  pidx;         /* producer index */
	unsigned long stops;        /* # of times q has been stopped */
	unsigned long restarts;     /* # of queue restarts */
	unsigned int  cntxt_id;     /* SGE context id for the Tx q */
	struct tx_desc *desc;       /* address of HW Tx descriptor ring */
	struct tx_sw_desc *sdesc;   /* address of SW Tx descriptor ring */
	struct sge_qstat *stat;     /* queue status entry */
	dma_addr_t    phys_addr;    /* physical address of the ring */
	spinlock_t db_lock;
	int db_disabled;
	unsigned short db_pidx;
	unsigned short db_pidx_inc;
	u64 udb;
};

struct sge_eth_txq {                /* state for an SGE Ethernet Tx queue */
	struct sge_txq q;
	struct netdev_queue *txq;   /* associated netdev TX queue */
	unsigned long tso;          /* # of TSO requests */
	unsigned long tx_cso;       /* # of Tx checksum offloads */
	unsigned long vlan_ins;     /* # of Tx VLAN insertions */
	unsigned long mapping_err;  /* # of I/O MMU packet mapping errors */
} ____cacheline_aligned_in_smp;

struct sge_ofld_txq {               /* state for an SGE offload Tx queue */
	struct sge_txq q;
	struct adapter *adap;
	struct sk_buff_head sendq;  /* list of backpressured packets */
	struct tasklet_struct qresume_tsk; /* restarts the queue */
	u8 full;                    /* the Tx ring is full */
	unsigned long mapping_err;  /* # of I/O MMU packet mapping errors */
} ____cacheline_aligned_in_smp;

struct sge_ctrl_txq {               /* state for an SGE control Tx queue */
	struct sge_txq q;
	struct adapter *adap;
	struct sk_buff_head sendq;  /* list of backpressured packets */
	struct tasklet_struct qresume_tsk; /* restarts the queue */
	u8 full;                    /* the Tx ring is full */
} ____cacheline_aligned_in_smp;

struct sge {
	struct sge_eth_txq ethtxq[MAX_ETH_QSETS];
	struct sge_ofld_txq ofldtxq[MAX_OFLD_QSETS];
	struct sge_ctrl_txq ctrlq[MAX_CTRL_QUEUES];

	struct sge_eth_rxq ethrxq[MAX_ETH_QSETS];
	struct sge_ofld_rxq ofldrxq[MAX_OFLD_QSETS];
	struct sge_ofld_rxq rdmarxq[MAX_RDMA_QUEUES];
	struct sge_rspq fw_evtq ____cacheline_aligned_in_smp;

	struct sge_rspq intrq ____cacheline_aligned_in_smp;
	spinlock_t intrq_lock;

	u16 max_ethqsets;           /* # of available Ethernet queue sets */
	u16 ethqsets;               /* # of active Ethernet queue sets */
	u16 ethtxq_rover;           /* Tx queue to clean up next */
	u16 ofldqsets;              /* # of active offload queue sets */
	u16 rdmaqs;                 /* # of available RDMA Rx queues */
	u16 ofld_rxq[MAX_OFLD_QSETS];
	u16 rdma_rxq[NCHAN];
	u16 timer_val[SGE_NTIMERS];
	u8 counter_val[SGE_NCOUNTERS];
	u32 fl_pg_order;            /* large page allocation size */
	u32 stat_len;               /* length of status page at ring end */
	u32 pktshift;               /* padding between CPL & packet data */
	u32 fl_align;               /* response queue message alignment */
	u32 fl_starve_thres;        /* Free List starvation threshold */

	/* State variables for detecting an SGE Ingress DMA hang */
	unsigned int idma_1s_thresh;/* SGE same State Counter 1s threshold */
	unsigned int idma_stalled[2];/* SGE synthesized stalled timers in HZ */
	unsigned int idma_state[2]; /* SGE IDMA Hang detect state */
	unsigned int idma_qid[2];   /* SGE IDMA Hung Ingress Queue ID */

	unsigned int egr_start;
	unsigned int ingr_start;
	void *egr_map[MAX_EGRQ];    /* qid->queue egress queue map */
	struct sge_rspq *ingr_map[MAX_INGQ]; /* qid->queue ingress queue map */
	DECLARE_BITMAP(starving_fl, MAX_EGRQ);
	DECLARE_BITMAP(txq_maperr, MAX_EGRQ);
	struct timer_list rx_timer; /* refills starving FLs */
	struct timer_list tx_timer; /* checks Tx queues */
};

#define for_each_ethrxq(sge, i) for (i = 0; i < (sge)->ethqsets; i++)
#define for_each_ofldrxq(sge, i) for (i = 0; i < (sge)->ofldqsets; i++)
#define for_each_rdmarxq(sge, i) for (i = 0; i < (sge)->rdmaqs; i++)

struct l2t_data;

#ifdef CONFIG_PCI_IOV

/* T4 supports SRIOV on PF0-3 and T5 on PF0-7.  However, the Serial
 * Configuration initialization for T5 only has SR-IOV functionality enabled
 * on PF0-3 in order to simplify everything.
 */
#define NUM_OF_PF_WITH_SRIOV 4

#endif

struct adapter {
	void __iomem *regs;
	void __iomem *bar2;
	struct pci_dev *pdev;
	struct device *pdev_dev;
	unsigned int mbox;
	unsigned int fn;
	unsigned int flags;
	enum chip_type chip;

	int msg_enable;

	struct adapter_params params;
	struct cxgb4_virt_res vres;
	unsigned int swintr;

	unsigned int wol;

	struct {
		unsigned short vec;
		char desc[IFNAMSIZ + 10];
	} msix_info[MAX_INGQ + 1];

	struct sge sge;

	struct net_device *port[MAX_NPORTS];
	u8 chan_map[NCHAN];                   /* channel -> port map */

	u32 filter_mode;
	unsigned int l2t_start;
	unsigned int l2t_end;
	struct l2t_data *l2t;
	void *uld_handle[CXGB4_ULD_MAX];
	struct list_head list_node;
	struct list_head rcu_node;

	struct tid_info tids;
	void **tid_release_head;
	spinlock_t tid_release_lock;
	struct work_struct tid_release_task;
	struct work_struct db_full_task;
	struct work_struct db_drop_task;
	bool tid_release_task_busy;

	struct dentry *debugfs_root;

	spinlock_t stats_lock;
};

/* Defined bit width of user definable filter tuples
 */
#define ETHTYPE_BITWIDTH 16
#define FRAG_BITWIDTH 1
#define MACIDX_BITWIDTH 9
#define FCOE_BITWIDTH 1
#define IPORT_BITWIDTH 3
#define MATCHTYPE_BITWIDTH 3
#define PROTO_BITWIDTH 8
#define TOS_BITWIDTH 8
#define PF_BITWIDTH 8
#define VF_BITWIDTH 8
#define IVLAN_BITWIDTH 16
#define OVLAN_BITWIDTH 16

/* Filter matching rules.  These consist of a set of ingress packet field
 * (value, mask) tuples.  The associated ingress packet field matches the
 * tuple when ((field & mask) == value).  (Thus a wildcard "don't care" field
 * rule can be constructed by specifying a tuple of (0, 0).)  A filter rule
 * matches an ingress packet when all of the individual individual field
 * matching rules are true.
 *
 * Partial field masks are always valid, however, while it may be easy to
 * understand their meanings for some fields (e.g. IP address to match a
 * subnet), for others making sensible partial masks is less intuitive (e.g.
 * MPS match type) ...
 *
 * Most of the following data structures are modeled on T4 capabilities.
 * Drivers for earlier chips use the subsets which make sense for those chips.
 * We really need to come up with a hardware-independent mechanism to
 * represent hardware filter capabilities ...
 */
struct ch_filter_tuple {
	/* Compressed header matching field rules.  The TP_VLAN_PRI_MAP
	 * register selects which of these fields will participate in the
	 * filter match rules -- up to a maximum of 36 bits.  Because
	 * TP_VLAN_PRI_MAP is a global register, all filters must use the same
	 * set of fields.
	 */
	uint32_t ethtype:ETHTYPE_BITWIDTH;      /* Ethernet type */
	uint32_t frag:FRAG_BITWIDTH;            /* IP fragmentation header */
	uint32_t ivlan_vld:1;                   /* inner VLAN valid */
	uint32_t ovlan_vld:1;                   /* outer VLAN valid */
	uint32_t pfvf_vld:1;                    /* PF/VF valid */
	uint32_t macidx:MACIDX_BITWIDTH;        /* exact match MAC index */
	uint32_t fcoe:FCOE_BITWIDTH;            /* FCoE packet */
	uint32_t iport:IPORT_BITWIDTH;          /* ingress port */
	uint32_t matchtype:MATCHTYPE_BITWIDTH;  /* MPS match type */
	uint32_t proto:PROTO_BITWIDTH;          /* protocol type */
	uint32_t tos:TOS_BITWIDTH;              /* TOS/Traffic Type */
	uint32_t pf:PF_BITWIDTH;                /* PCI-E PF ID */
	uint32_t vf:VF_BITWIDTH;                /* PCI-E VF ID */
	uint32_t ivlan:IVLAN_BITWIDTH;          /* inner VLAN */
	uint32_t ovlan:OVLAN_BITWIDTH;          /* outer VLAN */

	/* Uncompressed header matching field rules.  These are always
	 * available for field rules.
	 */
	uint8_t lip[16];        /* local IP address (IPv4 in [3:0]) */
	uint8_t fip[16];        /* foreign IP address (IPv4 in [3:0]) */
	uint16_t lport;         /* local port */
	uint16_t fport;         /* foreign port */
};

/* A filter ioctl command.
 */
struct ch_filter_specification {
	/* Administrative fields for filter.
	 */
	uint32_t hitcnts:1;     /* count filter hits in TCB */
	uint32_t prio:1;        /* filter has priority over active/server */

	/* Fundamental filter typing.  This is the one element of filter
	 * matching that doesn't exist as a (value, mask) tuple.
	 */
	uint32_t type:1;        /* 0 => IPv4, 1 => IPv6 */

	/* Packet dispatch information.  Ingress packets which match the
	 * filter rules will be dropped, passed to the host or switched back
	 * out as egress packets.
	 */
	uint32_t action:2;      /* drop, pass, switch */

	uint32_t rpttid:1;      /* report TID in RSS hash field */

	uint32_t dirsteer:1;    /* 0 => RSS, 1 => steer to iq */
	uint32_t iq:10;         /* ingress queue */

	uint32_t maskhash:1;    /* dirsteer=0: store RSS hash in TCB */
	uint32_t dirsteerhash:1;/* dirsteer=1: 0 => TCB contains RSS hash */
				/*             1 => TCB contains IQ ID */

	/* Switch proxy/rewrite fields.  An ingress packet which matches a
	 * filter with "switch" set will be looped back out as an egress
	 * packet -- potentially with some Ethernet header rewriting.
	 */
	uint32_t eport:2;       /* egress port to switch packet out */
	uint32_t newdmac:1;     /* rewrite destination MAC address */
	uint32_t newsmac:1;     /* rewrite source MAC address */
	uint32_t newvlan:2;     /* rewrite VLAN Tag */
	uint8_t dmac[ETH_ALEN]; /* new destination MAC address */
	uint8_t smac[ETH_ALEN]; /* new source MAC address */
	uint16_t vlan;          /* VLAN Tag to insert */

	/* Filter rule value/mask pairs.
	 */
	struct ch_filter_tuple val;
	struct ch_filter_tuple mask;
};

enum {
	FILTER_PASS = 0,        /* default */
	FILTER_DROP,
	FILTER_SWITCH
};

enum {
	VLAN_NOCHANGE = 0,      /* default */
	VLAN_REMOVE,
	VLAN_INSERT,
	VLAN_REWRITE
};

static inline int is_t5(enum chip_type chip)
{
	return CHELSIO_CHIP_VERSION(chip) == CHELSIO_T5;
}

static inline int is_t4(enum chip_type chip)
{
	return CHELSIO_CHIP_VERSION(chip) == CHELSIO_T4;
}

static inline u32 t4_read_reg(struct adapter *adap, u32 reg_addr)
{
	return readl(adap->regs + reg_addr);
}

static inline void t4_write_reg(struct adapter *adap, u32 reg_addr, u32 val)
{
	writel(val, adap->regs + reg_addr);
}

#ifndef readq
static inline u64 readq(const volatile void __iomem *addr)
{
	return readl(addr) + ((u64)readl(addr + 4) << 32);
}

static inline void writeq(u64 val, volatile void __iomem *addr)
{
	writel(val, addr);
	writel(val >> 32, addr + 4);
}
#endif

static inline u64 t4_read_reg64(struct adapter *adap, u32 reg_addr)
{
	return readq(adap->regs + reg_addr);
}

static inline void t4_write_reg64(struct adapter *adap, u32 reg_addr, u64 val)
{
	writeq(val, adap->regs + reg_addr);
}

/**
 * netdev2pinfo - return the port_info structure associated with a net_device
 * @dev: the netdev
 *
 * Return the struct port_info associated with a net_device
 */
static inline struct port_info *netdev2pinfo(const struct net_device *dev)
{
	return netdev_priv(dev);
}

/**
 * adap2pinfo - return the port_info of a port
 * @adap: the adapter
 * @idx: the port index
 *
 * Return the port_info structure for the port of the given index.
 */
static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
{
	return netdev_priv(adap->port[idx]);
}

/**
 * netdev2adap - return the adapter structure associated with a net_device
 * @dev: the netdev
 *
 * Return the struct adapter associated with a net_device
 */
static inline struct adapter *netdev2adap(const struct net_device *dev)
{
	return netdev2pinfo(dev)->adapter;
}

void t4_os_portmod_changed(const struct adapter *adap, int port_id);
void t4_os_link_changed(struct adapter *adap, int port_id, int link_stat);

void *t4_alloc_mem(size_t size);

void t4_free_sge_resources(struct adapter *adap);
irq_handler_t t4_intr_handler(struct adapter *adap);
netdev_tx_t t4_eth_xmit(struct sk_buff *skb, struct net_device *dev);
int t4_ethrx_handler(struct sge_rspq *q, const __be64 *rsp,
		     const struct pkt_gl *gl);
int t4_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
int t4_ofld_send(struct adapter *adap, struct sk_buff *skb);
int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
		     struct net_device *dev, int intr_idx,
		     struct sge_fl *fl, rspq_handler_t hnd);
int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
			 struct net_device *dev, struct netdev_queue *netdevq,
			 unsigned int iqid);
int t4_sge_alloc_ctrl_txq(struct adapter *adap, struct sge_ctrl_txq *txq,
			  struct net_device *dev, unsigned int iqid,
			  unsigned int cmplqid);
int t4_sge_alloc_ofld_txq(struct adapter *adap, struct sge_ofld_txq *txq,
			  struct net_device *dev, unsigned int iqid);
irqreturn_t t4_sge_intr_msix(int irq, void *cookie);
int t4_sge_init(struct adapter *adap);
void t4_sge_start(struct adapter *adap);
void t4_sge_stop(struct adapter *adap);
extern int dbfifo_int_thresh;

#define for_each_port(adapter, iter) \
	for (iter = 0; iter < (adapter)->params.nports; ++iter)

static inline int is_bypass(struct adapter *adap)
{
	return adap->params.bypass;
}

static inline int is_bypass_device(int device)
{
	/* this should be set based upon device capabilities */
	switch (device) {
	case 0x440b:
	case 0x440c:
		return 1;
	default:
		return 0;
	}
}

static inline unsigned int core_ticks_per_usec(const struct adapter *adap)
{
	return adap->params.vpd.cclk / 1000;
}

static inline unsigned int us_to_core_ticks(const struct adapter *adap,
					    unsigned int us)
{
	return (us * adap->params.vpd.cclk) / 1000;
}

static inline unsigned int core_ticks_to_us(const struct adapter *adapter,
					    unsigned int ticks)
{
	/* add Core Clock / 2 to round ticks to nearest uS */
	return ((ticks * 1000 + adapter->params.vpd.cclk/2) /
		adapter->params.vpd.cclk);
}

void t4_set_reg_field(struct adapter *adap, unsigned int addr, u32 mask,
		      u32 val);

int t4_wr_mbox_meat(struct adapter *adap, int mbox, const void *cmd, int size,
		    void *rpl, bool sleep_ok);

static inline int t4_wr_mbox(struct adapter *adap, int mbox, const void *cmd,
			     int size, void *rpl)
{
	return t4_wr_mbox_meat(adap, mbox, cmd, size, rpl, true);
}

static inline int t4_wr_mbox_ns(struct adapter *adap, int mbox, const void *cmd,
				int size, void *rpl)
{
	return t4_wr_mbox_meat(adap, mbox, cmd, size, rpl, false);
}

void t4_write_indirect(struct adapter *adap, unsigned int addr_reg,
		       unsigned int data_reg, const u32 *vals,
		       unsigned int nregs, unsigned int start_idx);
void t4_read_indirect(struct adapter *adap, unsigned int addr_reg,
		      unsigned int data_reg, u32 *vals, unsigned int nregs,
		      unsigned int start_idx);

struct fw_filter_wr;

void t4_intr_enable(struct adapter *adapter);
void t4_intr_disable(struct adapter *adapter);
int t4_slow_intr_handler(struct adapter *adapter);

int t4_wait_dev_ready(struct adapter *adap);
int t4_link_start(struct adapter *adap, unsigned int mbox, unsigned int port,
		  struct link_config *lc);
int t4_restart_aneg(struct adapter *adap, unsigned int mbox, unsigned int port);
int t4_memory_write(struct adapter *adap, int mtype, u32 addr, u32 len,
		    __be32 *buf);
int t4_seeprom_wp(struct adapter *adapter, bool enable);
int get_vpd_params(struct adapter *adapter, struct vpd_params *p);
int t4_load_fw(struct adapter *adapter, const u8 *fw_data, unsigned int size);
unsigned int t4_flash_cfg_addr(struct adapter *adapter);
int t4_get_fw_version(struct adapter *adapter, u32 *vers);
int t4_get_tp_version(struct adapter *adapter, u32 *vers);
int t4_prep_fw(struct adapter *adap, struct fw_info *fw_info,
	       const u8 *fw_data, unsigned int fw_size,
	       struct fw_hdr *card_fw, enum dev_state state, int *reset);
int t4_prep_adapter(struct adapter *adapter);
int t4_init_tp_params(struct adapter *adap);
int t4_filter_field_shift(const struct adapter *adap, int filter_sel);
int t4_port_init(struct adapter *adap, int mbox, int pf, int vf);
void t4_fatal_err(struct adapter *adapter);
int t4_config_rss_range(struct adapter *adapter, int mbox, unsigned int viid,
			int start, int n, const u16 *rspq, unsigned int nrspq);
int t4_config_glbl_rss(struct adapter *adapter, int mbox, unsigned int mode,
		       unsigned int flags);
int t4_mc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
	       u64 *parity);
int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
		u64 *parity);
const char *t4_get_port_type_description(enum fw_port_type port_type);
void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p);
void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log);
void t4_tp_wr_bits_indirect(struct adapter *adap, unsigned int addr,
			    unsigned int mask, unsigned int val);
void t4_tp_get_tcp_stats(struct adapter *adap, struct tp_tcp_stats *v4,
			 struct tp_tcp_stats *v6);
void t4_load_mtus(struct adapter *adap, const unsigned short *mtus,
		  const unsigned short *alpha, const unsigned short *beta);

void t4_mk_filtdelwr(unsigned int ftid, struct fw_filter_wr *wr, int qid);

void t4_wol_magic_enable(struct adapter *adap, unsigned int port,
			 const u8 *addr);
int t4_wol_pat_enable(struct adapter *adap, unsigned int port, unsigned int map,
		      u64 mask0, u64 mask1, unsigned int crc, bool enable);

int t4_fw_hello(struct adapter *adap, unsigned int mbox, unsigned int evt_mbox,
		enum dev_master master, enum dev_state *state);
int t4_fw_bye(struct adapter *adap, unsigned int mbox);
int t4_early_init(struct adapter *adap, unsigned int mbox);
int t4_fw_reset(struct adapter *adap, unsigned int mbox, int reset);
int t4_fixup_host_params(struct adapter *adap, unsigned int page_size,
			  unsigned int cache_line_size);
int t4_fw_initialize(struct adapter *adap, unsigned int mbox);
int t4_query_params(struct adapter *adap, unsigned int mbox, unsigned int pf,
		    unsigned int vf, unsigned int nparams, const u32 *params,
		    u32 *val);
int t4_set_params(struct adapter *adap, unsigned int mbox, unsigned int pf,
		  unsigned int vf, unsigned int nparams, const u32 *params,
		  const u32 *val);
int t4_cfg_pfvf(struct adapter *adap, unsigned int mbox, unsigned int pf,
		unsigned int vf, unsigned int txq, unsigned int txq_eth_ctrl,
		unsigned int rxqi, unsigned int rxq, unsigned int tc,
		unsigned int vi, unsigned int cmask, unsigned int pmask,
		unsigned int nexact, unsigned int rcaps, unsigned int wxcaps);
int t4_alloc_vi(struct adapter *adap, unsigned int mbox, unsigned int port,
		unsigned int pf, unsigned int vf, unsigned int nmac, u8 *mac,
		unsigned int *rss_size);
int t4_set_rxmode(struct adapter *adap, unsigned int mbox, unsigned int viid,
		int mtu, int promisc, int all_multi, int bcast, int vlanex,
		bool sleep_ok);
int t4_alloc_mac_filt(struct adapter *adap, unsigned int mbox,
		      unsigned int viid, bool free, unsigned int naddr,
		      const u8 **addr, u16 *idx, u64 *hash, bool sleep_ok);
int t4_change_mac(struct adapter *adap, unsigned int mbox, unsigned int viid,
		  int idx, const u8 *addr, bool persist, bool add_smt);
int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid,
		     bool ucast, u64 vec, bool sleep_ok);
int t4_enable_vi(struct adapter *adap, unsigned int mbox, unsigned int viid,
		 bool rx_en, bool tx_en);
int t4_identify_port(struct adapter *adap, unsigned int mbox, unsigned int viid,
		     unsigned int nblinks);
int t4_mdio_rd(struct adapter *adap, unsigned int mbox, unsigned int phy_addr,
	       unsigned int mmd, unsigned int reg, u16 *valp);
int t4_mdio_wr(struct adapter *adap, unsigned int mbox, unsigned int phy_addr,
	       unsigned int mmd, unsigned int reg, u16 val);
int t4_iq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
	       unsigned int vf, unsigned int iqtype, unsigned int iqid,
	       unsigned int fl0id, unsigned int fl1id);
int t4_eth_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
		   unsigned int vf, unsigned int eqid);
int t4_ctrl_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
		    unsigned int vf, unsigned int eqid);
int t4_ofld_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
		    unsigned int vf, unsigned int eqid);
int t4_handle_fw_rpl(struct adapter *adap, const __be64 *rpl);
void t4_db_full(struct adapter *adapter);
void t4_db_dropped(struct adapter *adapter);
int t4_mem_win_read_len(struct adapter *adap, u32 addr, __be32 *data, int len);
int t4_fwaddrspace_write(struct adapter *adap, unsigned int mbox,
			 u32 addr, u32 val);
void t4_sge_decode_idma_state(struct adapter *adapter, int state);
#endif /* __CXGB4_H__ */