drivers/scsi/qedf/qedf.h - linux - Git at Google

 /*
  *  QLogic FCoE Offload Driver
  *  Copyright (c) 2016 Cavium Inc.
  *
  *  This software is available 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.
  */
 #ifndef _QEDFC_H_
 #define _QEDFC_H_

 #include <scsi/libfcoe.h>
 #include <scsi/libfc.h>
 #include <scsi/fc/fc_fip.h>
 #include <scsi/fc/fc_fc2.h>
 #include <scsi/scsi_tcq.h>
 #include <scsi/fc_encode.h>
 #include <linux/version.h>


 /* qedf_hsi.h needs to before included any qed includes */
 #include "qedf_hsi.h"

 #include <linux/qed/qed_if.h>
 #include <linux/qed/qed_fcoe_if.h>
 #include <linux/qed/qed_ll2_if.h>
 #include "qedf_version.h"
 #include "qedf_dbg.h"

 /* Helpers to extract upper and lower 32-bits of pointer */
 #define U64_HI(val) ((u32)(((u64)(val)) >> 32))
 #define U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))

 #define QEDF_DESCR "QLogic FCoE Offload Driver"
 #define QEDF_MODULE_NAME "qedf"

 #define QEDF_MIN_XID		0
 #define QEDF_MAX_SCSI_XID	(NUM_TASKS_PER_CONNECTION - 1)
 #define QEDF_MAX_ELS_XID	4095
 #define QEDF_FLOGI_RETRY_CNT	3
 #define QEDF_RPORT_RETRY_CNT	255
 #define QEDF_MAX_SESSIONS	1024
 #define QEDF_MAX_PAYLOAD	2048
 #define QEDF_MAX_BDS_PER_CMD	256
 #define QEDF_MAX_BD_LEN		0xffff
 #define QEDF_BD_SPLIT_SZ	0x1000
 #define QEDF_PAGE_SIZE		4096
 #define QED_HW_DMA_BOUNDARY     0xfff
 #define QEDF_MAX_SGLEN_FOR_CACHESGL		((1U << 16) - 1)
 #define QEDF_MFS		(QEDF_MAX_PAYLOAD + \
 	sizeof(struct fc_frame_header))
 #define QEDF_MAX_NPIV		64
 #define QEDF_TM_TIMEOUT		10
 #define QEDF_ABORT_TIMEOUT	10
 #define QEDF_CLEANUP_TIMEOUT	10
 #define QEDF_MAX_CDB_LEN	16

 #define UPSTREAM_REMOVE		1
 #define UPSTREAM_KEEP		1

 struct qedf_mp_req {
 	uint8_t tm_flags;

 	uint32_t req_len;
 	void *req_buf;
 	dma_addr_t req_buf_dma;
 	struct fcoe_sge *mp_req_bd;
 	dma_addr_t mp_req_bd_dma;
 	struct fc_frame_header req_fc_hdr;

 	uint32_t resp_len;
 	void *resp_buf;
 	dma_addr_t resp_buf_dma;
 	struct fcoe_sge *mp_resp_bd;
 	dma_addr_t mp_resp_bd_dma;
 	struct fc_frame_header resp_fc_hdr;
 };

 struct qedf_els_cb_arg {
 	struct qedf_ioreq *aborted_io_req;
 	struct qedf_ioreq *io_req;
 	u8 op; /* Used to keep track of ELS op */
 	uint16_t l2_oxid;
 	u32 offset; /* Used for sequence cleanup */
 	u8 r_ctl; /* Used for sequence cleanup */
 };

 enum qedf_ioreq_event {
 	QEDF_IOREQ_EV_ABORT_SUCCESS,
 	QEDF_IOREQ_EV_ABORT_FAILED,
 	QEDF_IOREQ_EV_SEND_RRQ,
 	QEDF_IOREQ_EV_ELS_TMO,
 	QEDF_IOREQ_EV_ELS_ERR_DETECT,
 	QEDF_IOREQ_EV_ELS_FLUSH,
 	QEDF_IOREQ_EV_CLEANUP_SUCCESS,
 	QEDF_IOREQ_EV_CLEANUP_FAILED,
 };

 #define FC_GOOD		0
 #define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER	(0x1<<2)
 #define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER	(0x1<<3)
 #define CMD_SCSI_STATUS(Cmnd)			((Cmnd)->SCp.Status)
 #define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID	(0x1<<0)
 #define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID	(0x1<<1)
 struct qedf_ioreq {
 	struct list_head link;
 	uint16_t xid;
 	struct scsi_cmnd *sc_cmd;
 	bool use_slowpath; /* Use slow SGL for this I/O */
 #define QEDF_SCSI_CMD		1
 #define QEDF_TASK_MGMT_CMD	2
 #define QEDF_ABTS		3
 #define QEDF_ELS		4
 #define QEDF_CLEANUP		5
 #define QEDF_SEQ_CLEANUP	6
 	u8 cmd_type;
 #define QEDF_CMD_OUTSTANDING		0x0
 #define QEDF_CMD_IN_ABORT		0x1
 #define QEDF_CMD_IN_CLEANUP		0x2
 #define QEDF_CMD_SRR_SENT		0x3
 	u8 io_req_flags;
 	struct qedf_rport *fcport;
 	unsigned long flags;
 	enum qedf_ioreq_event event;
 	size_t data_xfer_len;
 	struct kref refcount;
 	struct qedf_cmd_mgr *cmd_mgr;
 	struct io_bdt *bd_tbl;
 	struct delayed_work timeout_work;
 	struct completion tm_done;
 	struct completion abts_done;
 	struct fcoe_task_context *task;
 	int idx;
 /*
  * Need to allocate enough room for both sense data and FCP response data
  * which has a max length of 8 bytes according to spec.
  */
 #define QEDF_SCSI_SENSE_BUFFERSIZE	(SCSI_SENSE_BUFFERSIZE + 8)
 	uint8_t *sense_buffer;
 	dma_addr_t sense_buffer_dma;
 	u32 fcp_resid;
 	u32 fcp_rsp_len;
 	u32 fcp_sns_len;
 	u8 cdb_status;
 	u8 fcp_status;
 	u8 fcp_rsp_code;
 	u8 scsi_comp_flags;
 #define QEDF_MAX_REUSE		0xfff
 	u16 reuse_count;
 	struct qedf_mp_req mp_req;
 	void (*cb_func)(struct qedf_els_cb_arg *cb_arg);
 	struct qedf_els_cb_arg *cb_arg;
 	int fp_idx;
 	unsigned int cpu;
 	unsigned int int_cpu;
 #define QEDF_IOREQ_SLOW_SGE		0
 #define QEDF_IOREQ_SINGLE_SGE		1
 #define QEDF_IOREQ_FAST_SGE		2
 	u8 sge_type;
 	struct delayed_work rrq_work;

 	/* Used for sequence level recovery; i.e. REC/SRR */
 	uint32_t rx_buf_off;
 	uint32_t tx_buf_off;
 	uint32_t rx_id;
 	uint32_t task_retry_identifier;

 	/*
 	 * Used to tell if we need to return a SCSI command
 	 * during some form of error processing.
 	 */
 	bool return_scsi_cmd_on_abts;
 };

 extern struct workqueue_struct *qedf_io_wq;

 struct qedf_rport {
 	spinlock_t rport_lock;
 #define QEDF_RPORT_SESSION_READY 1
 #define QEDF_RPORT_UPLOADING_CONNECTION	2
 	unsigned long flags;
 	unsigned long retry_delay_timestamp;
 	struct fc_rport *rport;
 	struct fc_rport_priv *rdata;
 	struct qedf_ctx *qedf;
 	u32 handle; /* Handle from qed */
 	u32 fw_cid; /* fw_cid from qed */
 	void __iomem *p_doorbell;
 	/* Send queue management */
 	atomic_t free_sqes;
 	atomic_t num_active_ios;
 	struct fcoe_wqe *sq;
 	dma_addr_t sq_dma;
 	u16 sq_prod_idx;
 	u16 fw_sq_prod_idx;
 	u16 sq_con_idx;
 	u32 sq_mem_size;
 	void *sq_pbl;
 	dma_addr_t sq_pbl_dma;
 	u32 sq_pbl_size;
 	u32 sid;
 #define	QEDF_RPORT_TYPE_DISK		1
 #define	QEDF_RPORT_TYPE_TAPE		2
 	uint dev_type; /* Disk or tape */
 	struct list_head peers;
 };

 /* Used to contain LL2 skb's in ll2_skb_list */
 struct qedf_skb_work {
 	struct work_struct work;
 	struct sk_buff *skb;
 	struct qedf_ctx *qedf;
 };

 struct qedf_fastpath {
 #define	QEDF_SB_ID_NULL		0xffff
 	u16		sb_id;
 	struct qed_sb_info	*sb_info;
 	struct qedf_ctx *qedf;
 	/* Keep track of number of completions on this fastpath */
 	unsigned long completions;
 	uint32_t cq_num_entries;
 };

 /* Used to pass fastpath information needed to process CQEs */
 struct qedf_io_work {
 	struct work_struct work;
 	struct fcoe_cqe cqe;
 	struct qedf_ctx *qedf;
 	struct fc_frame *fp;
 };

 struct qedf_glbl_q_params {
 	u64	hw_p_cq;	/* Completion queue PBL */
 	u64	hw_p_rq;	/* Request queue PBL */
 	u64	hw_p_cmdq;	/* Command queue PBL */
 };

 struct global_queue {
 	struct fcoe_cqe *cq;
 	dma_addr_t cq_dma;
 	u32 cq_mem_size;
 	u32 cq_cons_idx; /* Completion queue consumer index */
 	u32 cq_prod_idx;

 	void *cq_pbl;
 	dma_addr_t cq_pbl_dma;
 	u32 cq_pbl_size;
 };

 /* I/O tracing entry */
 #define QEDF_IO_TRACE_SIZE		2048
 struct qedf_io_log {
 #define QEDF_IO_TRACE_REQ		0
 #define QEDF_IO_TRACE_RSP		1
 	uint8_t direction;
 	uint16_t task_id;
 	uint32_t port_id; /* Remote port fabric ID */
 	int lun;
 	char op; /* SCSI CDB */
 	uint8_t lba[4];
 	unsigned int bufflen; /* SCSI buffer length */
 	unsigned int sg_count; /* Number of SG elements */
 	int result; /* Result passed back to mid-layer */
 	unsigned long jiffies; /* Time stamp when I/O logged */
 	int refcount; /* Reference count for task id */
 	unsigned int req_cpu; /* CPU that the task is queued on */
 	unsigned int int_cpu; /* Interrupt CPU that the task is received on */
 	unsigned int rsp_cpu; /* CPU that task is returned on */
 	u8 sge_type; /* Did we take the slow, single or fast SGE path */
 };

 /* Number of entries in BDQ */
 #define QEDF_BDQ_SIZE			256
 #define QEDF_BDQ_BUF_SIZE		2072

 /* DMA coherent buffers for BDQ */
 struct qedf_bdq_buf {
 	void *buf_addr;
 	dma_addr_t buf_dma;
 };

 /* Main adapter struct */
 struct qedf_ctx {
 	struct qedf_dbg_ctx dbg_ctx;
 	struct fcoe_ctlr ctlr;
 	struct fc_lport *lport;
 	u8 data_src_addr[ETH_ALEN];
 #define QEDF_LINK_DOWN		0
 #define QEDF_LINK_UP		1
 	atomic_t link_state;
 #define QEDF_DCBX_PENDING	0
 #define QEDF_DCBX_DONE		1
 	atomic_t dcbx;
 	uint16_t max_scsi_xid;
 	uint16_t max_els_xid;
 #define QEDF_NULL_VLAN_ID	-1
 #define QEDF_FALLBACK_VLAN	1002
 #define QEDF_DEFAULT_PRIO	3
 	int vlan_id;
 	uint vlan_hw_insert:1;
 	struct qed_dev *cdev;
 	struct qed_dev_fcoe_info dev_info;
 	struct qed_int_info int_info;
 	uint16_t last_command;
 	spinlock_t hba_lock;
 	struct pci_dev *pdev;
 	u64 wwnn;
 	u64 wwpn;
 	u8 __aligned(16) mac[ETH_ALEN];
 	struct list_head fcports;
 	atomic_t num_offloads;
 	unsigned int curr_conn_id;
 	struct workqueue_struct *ll2_recv_wq;
 	struct workqueue_struct *link_update_wq;
 	struct delayed_work link_update;
 	struct delayed_work link_recovery;
 	struct completion flogi_compl;
 	struct completion fipvlan_compl;

 	/*
 	 * Used to tell if we're in the window where we are waiting for
 	 * the link to come back up before informting fcoe that the link is
 	 * done.
 	 */
 	atomic_t link_down_tmo_valid;
 #define QEDF_TIMER_INTERVAL		(1 * HZ)
 	struct timer_list timer; /* One second book keeping timer */
 #define QEDF_DRAIN_ACTIVE		1
 #define QEDF_LL2_STARTED		2
 #define QEDF_UNLOADING			3
 #define QEDF_GRCDUMP_CAPTURE		4
 #define QEDF_IN_RECOVERY		5
 #define QEDF_DBG_STOP_IO		6
 	unsigned long flags; /* Miscellaneous state flags */
 	int fipvlan_retries;
 	u8 num_queues;
 	struct global_queue **global_queues;
 	/* Pointer to array of queue structures */
 	struct qedf_glbl_q_params *p_cpuq;
 	/* Physical address of array of queue structures */
 	dma_addr_t hw_p_cpuq;

 	struct qedf_bdq_buf bdq[QEDF_BDQ_SIZE];
 	void *bdq_pbl;
 	dma_addr_t bdq_pbl_dma;
 	size_t bdq_pbl_mem_size;
 	void *bdq_pbl_list;
 	dma_addr_t bdq_pbl_list_dma;
 	u8 bdq_pbl_list_num_entries;
 	void __iomem *bdq_primary_prod;
 	void __iomem *bdq_secondary_prod;
 	uint16_t bdq_prod_idx;

 	/* Structure for holding all the fastpath for this qedf_ctx */
 	struct qedf_fastpath *fp_array;
 	struct qed_fcoe_tid tasks;
 	struct qedf_cmd_mgr *cmd_mgr;
 	/* Holds the PF parameters we pass to qed to start he FCoE function */
 	struct qed_pf_params pf_params;
 	/* Used to time middle path ELS and TM commands */
 	struct workqueue_struct *timer_work_queue;

 #define QEDF_IO_WORK_MIN		64
 	mempool_t *io_mempool;
 	struct workqueue_struct *dpc_wq;

 	u32 slow_sge_ios;
 	u32 fast_sge_ios;
 	u32 single_sge_ios;

 	uint8_t	*grcdump;
 	uint32_t grcdump_size;

 	struct qedf_io_log io_trace_buf[QEDF_IO_TRACE_SIZE];
 	spinlock_t io_trace_lock;
 	uint16_t io_trace_idx;

 	bool stop_io_on_error;

 	u32 flogi_cnt;
 	u32 flogi_failed;

 	/* Used for fc statistics */
 	u64 input_requests;
 	u64 output_requests;
 	u64 control_requests;
 	u64 packet_aborts;
 	u64 alloc_failures;
 };

 struct io_bdt {
 	struct qedf_ioreq *io_req;
 	struct fcoe_sge *bd_tbl;
 	dma_addr_t bd_tbl_dma;
 	u16 bd_valid;
 };

 struct qedf_cmd_mgr {
 	struct qedf_ctx *qedf;
 	u16 idx;
 	struct io_bdt **io_bdt_pool;
 #define FCOE_PARAMS_NUM_TASKS		4096
 	struct qedf_ioreq cmds[FCOE_PARAMS_NUM_TASKS];
 	spinlock_t lock;
 	atomic_t free_list_cnt;
 };

 /* Stolen from qed_cxt_api.h and adapted for qed_fcoe_info
  * Usage:
  *
  * void *ptr;
  * ptr = qedf_get_task_mem(&qedf->tasks, 128);
  */
 static inline void *qedf_get_task_mem(struct qed_fcoe_tid *info, u32 tid)
 {
 	return (void *)(info->blocks[tid / info->num_tids_per_block] +
 			(tid % info->num_tids_per_block) * info->size);
 }

 static inline void qedf_stop_all_io(struct qedf_ctx *qedf)
 {
 	set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
 }

 /*
  * Externs
  */
 #define QEDF_DEFAULT_LOG_MASK		0x3CFB6
 extern const struct qed_fcoe_ops *qed_ops;
 extern uint qedf_dump_frames;
 extern uint qedf_io_tracing;
 extern uint qedf_stop_io_on_error;
 extern uint qedf_link_down_tmo;
 #define QEDF_RETRY_DELAY_MAX		20 /* 2 seconds */
 extern bool qedf_retry_delay;
 extern uint qedf_debug;

 extern struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf);
 extern void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr);
 extern int qedf_queuecommand(struct Scsi_Host *host,
 	struct scsi_cmnd *sc_cmd);
 extern void qedf_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
 extern void qedf_update_src_mac(struct fc_lport *lport, u8 *addr);
 extern u8 *qedf_get_src_mac(struct fc_lport *lport);
 extern void qedf_fip_recv(struct qedf_ctx *qedf, struct sk_buff *skb);
 extern void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf);
 extern void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	struct qedf_ioreq *io_req);
 extern void qedf_process_warning_compl(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
 extern void qedf_process_error_detect(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
 extern void qedf_flush_active_ios(struct qedf_rport *fcport, int lun);
 extern void qedf_release_cmd(struct kref *ref);
 extern int qedf_initiate_abts(struct qedf_ioreq *io_req,
 	bool return_scsi_cmd_on_abts);
 extern void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	struct qedf_ioreq *io_req);
 extern struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport,
 	u8 cmd_type);

 extern struct device_attribute *qedf_host_attrs[];
 extern void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
 	unsigned int timer_msec);
 extern int qedf_init_mp_req(struct qedf_ioreq *io_req);
 extern void qedf_init_mp_task(struct qedf_ioreq *io_req,
 	struct fcoe_task_context *task_ctx);
 extern void qedf_add_to_sq(struct qedf_rport *fcport, u16 xid,
 	u32 ptu_invalidate, enum fcoe_task_type req_type, u32 offset);
 extern void qedf_ring_doorbell(struct qedf_rport *fcport);
 extern void qedf_process_els_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	struct qedf_ioreq *els_req);
 extern int qedf_send_rrq(struct qedf_ioreq *aborted_io_req);
 extern int qedf_send_adisc(struct qedf_rport *fcport, struct fc_frame *fp);
 extern int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
 	bool return_scsi_cmd_on_abts);
 extern void qedf_process_cleanup_compl(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
 extern int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags);
 extern void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	struct qedf_ioreq *io_req);
 extern void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe);
 extern void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
 	int result);
 extern void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id);
 extern void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf);
 extern void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf);
 extern void qedf_capture_grc_dump(struct qedf_ctx *qedf);
 extern void qedf_wait_for_upload(struct qedf_ctx *qedf);
 extern void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx,
 	struct fcoe_cqe *cqe);
 extern void qedf_restart_rport(struct qedf_rport *fcport);
 extern int qedf_send_rec(struct qedf_ioreq *orig_io_req);
 extern int qedf_post_io_req(struct qedf_rport *fcport,
 	struct qedf_ioreq *io_req);
 extern void qedf_process_seq_cleanup_compl(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
 extern int qedf_send_flogi(struct qedf_ctx *qedf);
 extern void qedf_fp_io_handler(struct work_struct *work);

 #define FCOE_WORD_TO_BYTE  4
 #define QEDF_MAX_TASK_NUM	0xFFFF

 struct fip_vlan {
 	struct ethhdr eth;
 	struct fip_header fip;
 	struct {
 		struct fip_mac_desc mac;
 		struct fip_wwn_desc wwnn;
 	} desc;
 };

 /* SQ/CQ Sizes */
 #define GBL_RSVD_TASKS			16
 #define NUM_TASKS_PER_CONNECTION	1024
 #define NUM_RW_TASKS_PER_CONNECTION	512
 #define FCOE_PARAMS_CQ_NUM_ENTRIES	FCOE_PARAMS_NUM_TASKS

 #define FCOE_PARAMS_CMDQ_NUM_ENTRIES	FCOE_PARAMS_NUM_TASKS
 #define SQ_NUM_ENTRIES			NUM_TASKS_PER_CONNECTION

 #define QEDF_FCOE_PARAMS_GL_RQ_PI              0
 #define QEDF_FCOE_PARAMS_GL_CMD_PI             1

 #define QEDF_READ                     (1 << 1)
 #define QEDF_WRITE                    (1 << 0)
 #define MAX_FIBRE_LUNS			0xffffffff

 #define QEDF_MAX_NUM_CQS		8

 /*
  * PCI function probe defines
  */
 /* Probe/remove called during normal PCI probe */
 #define	QEDF_MODE_NORMAL		0
 /* Probe/remove called from qed error recovery */
 #define QEDF_MODE_RECOVERY		1

 #define SUPPORTED_25000baseKR_Full    (1<<27)
 #define SUPPORTED_50000baseKR2_Full   (1<<28)
 #define SUPPORTED_100000baseKR4_Full  (1<<29)
 #define SUPPORTED_100000baseCR4_Full  (1<<30)

 #endif
	/*
	* QLogic FCoE Offload Driver
	* Copyright (c) 2016 Cavium Inc.
	*
	* This software is available 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.
	*/
	#ifndef _QEDFC_H_
	#define _QEDFC_H_

	#include <scsi/libfcoe.h>
	#include <scsi/libfc.h>
	#include <scsi/fc/fc_fip.h>
	#include <scsi/fc/fc_fc2.h>
	#include <scsi/scsi_tcq.h>
	#include <scsi/fc_encode.h>
	#include <linux/version.h>


	/* qedf_hsi.h needs to before included any qed includes */
	#include "qedf_hsi.h"

	#include <linux/qed/qed_if.h>
	#include <linux/qed/qed_fcoe_if.h>
	#include <linux/qed/qed_ll2_if.h>
	#include "qedf_version.h"
	#include "qedf_dbg.h"

	/* Helpers to extract upper and lower 32-bits of pointer */
	#define U64_HI(val) ((u32)(((u64)(val)) >> 32))
	#define U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))

	#define QEDF_DESCR "QLogic FCoE Offload Driver"
	#define QEDF_MODULE_NAME "qedf"

	#define QEDF_MIN_XID 0
	#define QEDF_MAX_SCSI_XID (NUM_TASKS_PER_CONNECTION - 1)
	#define QEDF_MAX_ELS_XID 4095
	#define QEDF_FLOGI_RETRY_CNT 3
	#define QEDF_RPORT_RETRY_CNT 255
	#define QEDF_MAX_SESSIONS 1024
	#define QEDF_MAX_PAYLOAD 2048
	#define QEDF_MAX_BDS_PER_CMD 256
	#define QEDF_MAX_BD_LEN 0xffff
	#define QEDF_BD_SPLIT_SZ 0x1000
	#define QEDF_PAGE_SIZE 4096
	#define QED_HW_DMA_BOUNDARY 0xfff
	#define QEDF_MAX_SGLEN_FOR_CACHESGL ((1U << 16) - 1)
	#define QEDF_MFS (QEDF_MAX_PAYLOAD + \
	sizeof(struct fc_frame_header))
	#define QEDF_MAX_NPIV 64
	#define QEDF_TM_TIMEOUT 10
	#define QEDF_ABORT_TIMEOUT 10
	#define QEDF_CLEANUP_TIMEOUT 10
	#define QEDF_MAX_CDB_LEN 16

	#define UPSTREAM_REMOVE 1
	#define UPSTREAM_KEEP 1

	struct qedf_mp_req {
	uint8_t tm_flags;

	uint32_t req_len;
	void *req_buf;
	dma_addr_t req_buf_dma;
	struct fcoe_sge *mp_req_bd;
	dma_addr_t mp_req_bd_dma;
	struct fc_frame_header req_fc_hdr;

	uint32_t resp_len;
	void *resp_buf;
	dma_addr_t resp_buf_dma;
	struct fcoe_sge *mp_resp_bd;
	dma_addr_t mp_resp_bd_dma;
	struct fc_frame_header resp_fc_hdr;
	};

	struct qedf_els_cb_arg {
	struct qedf_ioreq *aborted_io_req;
	struct qedf_ioreq *io_req;
	u8 op; /* Used to keep track of ELS op */
	uint16_t l2_oxid;
	u32 offset; /* Used for sequence cleanup */
	u8 r_ctl; /* Used for sequence cleanup */
	};

	enum qedf_ioreq_event {
	QEDF_IOREQ_EV_ABORT_SUCCESS,
	QEDF_IOREQ_EV_ABORT_FAILED,
	QEDF_IOREQ_EV_SEND_RRQ,
	QEDF_IOREQ_EV_ELS_TMO,
	QEDF_IOREQ_EV_ELS_ERR_DETECT,
	QEDF_IOREQ_EV_ELS_FLUSH,
	QEDF_IOREQ_EV_CLEANUP_SUCCESS,
	QEDF_IOREQ_EV_CLEANUP_FAILED,
	};

	#define FC_GOOD 0
	#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER (0x1<<2)
	#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER (0x1<<3)
	#define CMD_SCSI_STATUS(Cmnd) ((Cmnd)->SCp.Status)
	#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID (0x1<<0)
	#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID (0x1<<1)
	struct qedf_ioreq {
	struct list_head link;
	uint16_t xid;
	struct scsi_cmnd *sc_cmd;
	bool use_slowpath; /* Use slow SGL for this I/O */
	#define QEDF_SCSI_CMD 1
	#define QEDF_TASK_MGMT_CMD 2
	#define QEDF_ABTS 3
	#define QEDF_ELS 4
	#define QEDF_CLEANUP 5
	#define QEDF_SEQ_CLEANUP 6
	u8 cmd_type;
	#define QEDF_CMD_OUTSTANDING 0x0
	#define QEDF_CMD_IN_ABORT 0x1
	#define QEDF_CMD_IN_CLEANUP 0x2
	#define QEDF_CMD_SRR_SENT 0x3
	u8 io_req_flags;
	struct qedf_rport *fcport;
	unsigned long flags;
	enum qedf_ioreq_event event;
	size_t data_xfer_len;
	struct kref refcount;
	struct qedf_cmd_mgr *cmd_mgr;
	struct io_bdt *bd_tbl;
	struct delayed_work timeout_work;
	struct completion tm_done;
	struct completion abts_done;
	struct fcoe_task_context *task;
	int idx;
	/*
	* Need to allocate enough room for both sense data and FCP response data
	* which has a max length of 8 bytes according to spec.
	*/
	#define QEDF_SCSI_SENSE_BUFFERSIZE (SCSI_SENSE_BUFFERSIZE + 8)
	uint8_t *sense_buffer;
	dma_addr_t sense_buffer_dma;
	u32 fcp_resid;
	u32 fcp_rsp_len;
	u32 fcp_sns_len;
	u8 cdb_status;
	u8 fcp_status;
	u8 fcp_rsp_code;
	u8 scsi_comp_flags;
	#define QEDF_MAX_REUSE 0xfff
	u16 reuse_count;
	struct qedf_mp_req mp_req;
	void (cb_func)(struct qedf_els_cb_arg cb_arg);
	struct qedf_els_cb_arg *cb_arg;
	int fp_idx;
	unsigned int cpu;
	unsigned int int_cpu;
	#define QEDF_IOREQ_SLOW_SGE 0
	#define QEDF_IOREQ_SINGLE_SGE 1
	#define QEDF_IOREQ_FAST_SGE 2
	u8 sge_type;
	struct delayed_work rrq_work;

	/* Used for sequence level recovery; i.e. REC/SRR */
	uint32_t rx_buf_off;
	uint32_t tx_buf_off;
	uint32_t rx_id;
	uint32_t task_retry_identifier;

	/*
	* Used to tell if we need to return a SCSI command
	* during some form of error processing.
	*/
	bool return_scsi_cmd_on_abts;
	};

	extern struct workqueue_struct *qedf_io_wq;

	struct qedf_rport {
	spinlock_t rport_lock;
	#define QEDF_RPORT_SESSION_READY 1
	#define QEDF_RPORT_UPLOADING_CONNECTION 2
	unsigned long flags;
	unsigned long retry_delay_timestamp;
	struct fc_rport *rport;
	struct fc_rport_priv *rdata;
	struct qedf_ctx *qedf;
	u32 handle; /* Handle from qed */
	u32 fw_cid; /* fw_cid from qed */
	void __iomem *p_doorbell;
	/* Send queue management */
	atomic_t free_sqes;
	atomic_t num_active_ios;
	struct fcoe_wqe *sq;
	dma_addr_t sq_dma;
	u16 sq_prod_idx;
	u16 fw_sq_prod_idx;
	u16 sq_con_idx;
	u32 sq_mem_size;
	void *sq_pbl;
	dma_addr_t sq_pbl_dma;
	u32 sq_pbl_size;
	u32 sid;
	#define QEDF_RPORT_TYPE_DISK 1
	#define QEDF_RPORT_TYPE_TAPE 2
	uint dev_type; /* Disk or tape */
	struct list_head peers;
	};

	/* Used to contain LL2 skb's in ll2_skb_list */
	struct qedf_skb_work {
	struct work_struct work;
	struct sk_buff *skb;
	struct qedf_ctx *qedf;
	};

	struct qedf_fastpath {
	#define QEDF_SB_ID_NULL 0xffff
	u16 sb_id;
	struct qed_sb_info *sb_info;
	struct qedf_ctx *qedf;
	/* Keep track of number of completions on this fastpath */
	unsigned long completions;
	uint32_t cq_num_entries;
	};

	/* Used to pass fastpath information needed to process CQEs */
	struct qedf_io_work {
	struct work_struct work;
	struct fcoe_cqe cqe;
	struct qedf_ctx *qedf;
	struct fc_frame *fp;
	};

	struct qedf_glbl_q_params {
	u64 hw_p_cq; /* Completion queue PBL */
	u64 hw_p_rq; /* Request queue PBL */
	u64 hw_p_cmdq; /* Command queue PBL */
	};

	struct global_queue {
	struct fcoe_cqe *cq;
	dma_addr_t cq_dma;
	u32 cq_mem_size;
	u32 cq_cons_idx; /* Completion queue consumer index */
	u32 cq_prod_idx;

	void *cq_pbl;
	dma_addr_t cq_pbl_dma;
	u32 cq_pbl_size;
	};

	/* I/O tracing entry */
	#define QEDF_IO_TRACE_SIZE 2048
	struct qedf_io_log {
	#define QEDF_IO_TRACE_REQ 0
	#define QEDF_IO_TRACE_RSP 1
	uint8_t direction;
	uint16_t task_id;
	uint32_t port_id; /* Remote port fabric ID */
	int lun;
	char op; /* SCSI CDB */
	uint8_t lba[4];
	unsigned int bufflen; /* SCSI buffer length */
	unsigned int sg_count; /* Number of SG elements */
	int result; /* Result passed back to mid-layer */
	unsigned long jiffies; /* Time stamp when I/O logged */
	int refcount; /* Reference count for task id */
	unsigned int req_cpu; /* CPU that the task is queued on */
	unsigned int int_cpu; /* Interrupt CPU that the task is received on */
	unsigned int rsp_cpu; /* CPU that task is returned on */
	u8 sge_type; /* Did we take the slow, single or fast SGE path */
	};

	/* Number of entries in BDQ */
	#define QEDF_BDQ_SIZE 256
	#define QEDF_BDQ_BUF_SIZE 2072

	/* DMA coherent buffers for BDQ */
	struct qedf_bdq_buf {
	void *buf_addr;
	dma_addr_t buf_dma;
	};

	/* Main adapter struct */
	struct qedf_ctx {
	struct qedf_dbg_ctx dbg_ctx;
	struct fcoe_ctlr ctlr;
	struct fc_lport *lport;
	u8 data_src_addr[ETH_ALEN];
	#define QEDF_LINK_DOWN 0
	#define QEDF_LINK_UP 1
	atomic_t link_state;
	#define QEDF_DCBX_PENDING 0
	#define QEDF_DCBX_DONE 1
	atomic_t dcbx;
	uint16_t max_scsi_xid;
	uint16_t max_els_xid;
	#define QEDF_NULL_VLAN_ID -1
	#define QEDF_FALLBACK_VLAN 1002
	#define QEDF_DEFAULT_PRIO 3
	int vlan_id;
	uint vlan_hw_insert:1;
	struct qed_dev *cdev;
	struct qed_dev_fcoe_info dev_info;
	struct qed_int_info int_info;
	uint16_t last_command;
	spinlock_t hba_lock;
	struct pci_dev *pdev;
	u64 wwnn;
	u64 wwpn;
	u8 __aligned(16) mac[ETH_ALEN];
	struct list_head fcports;
	atomic_t num_offloads;
	unsigned int curr_conn_id;
	struct workqueue_struct *ll2_recv_wq;
	struct workqueue_struct *link_update_wq;
	struct delayed_work link_update;
	struct delayed_work link_recovery;
	struct completion flogi_compl;
	struct completion fipvlan_compl;

	/*
	* Used to tell if we're in the window where we are waiting for
	* the link to come back up before informting fcoe that the link is
	* done.
	*/
	atomic_t link_down_tmo_valid;
	#define QEDF_TIMER_INTERVAL (1 * HZ)
	struct timer_list timer; /* One second book keeping timer */
	#define QEDF_DRAIN_ACTIVE 1
	#define QEDF_LL2_STARTED 2
	#define QEDF_UNLOADING 3
	#define QEDF_GRCDUMP_CAPTURE 4
	#define QEDF_IN_RECOVERY 5
	#define QEDF_DBG_STOP_IO 6
	unsigned long flags; /* Miscellaneous state flags */
	int fipvlan_retries;
	u8 num_queues;
	struct global_queue **global_queues;
	/* Pointer to array of queue structures */
	struct qedf_glbl_q_params *p_cpuq;
	/* Physical address of array of queue structures */
	dma_addr_t hw_p_cpuq;

	struct qedf_bdq_buf bdq[QEDF_BDQ_SIZE];
	void *bdq_pbl;
	dma_addr_t bdq_pbl_dma;
	size_t bdq_pbl_mem_size;
	void *bdq_pbl_list;
	dma_addr_t bdq_pbl_list_dma;
	u8 bdq_pbl_list_num_entries;
	void __iomem *bdq_primary_prod;
	void __iomem *bdq_secondary_prod;
	uint16_t bdq_prod_idx;

	/* Structure for holding all the fastpath for this qedf_ctx */
	struct qedf_fastpath *fp_array;
	struct qed_fcoe_tid tasks;
	struct qedf_cmd_mgr *cmd_mgr;
	/* Holds the PF parameters we pass to qed to start he FCoE function */
	struct qed_pf_params pf_params;
	/* Used to time middle path ELS and TM commands */
	struct workqueue_struct *timer_work_queue;

	#define QEDF_IO_WORK_MIN 64
	mempool_t *io_mempool;
	struct workqueue_struct *dpc_wq;

	u32 slow_sge_ios;
	u32 fast_sge_ios;
	u32 single_sge_ios;

	uint8_t *grcdump;
	uint32_t grcdump_size;

	struct qedf_io_log io_trace_buf[QEDF_IO_TRACE_SIZE];
	spinlock_t io_trace_lock;
	uint16_t io_trace_idx;

	bool stop_io_on_error;

	u32 flogi_cnt;
	u32 flogi_failed;

	/* Used for fc statistics */
	u64 input_requests;
	u64 output_requests;
	u64 control_requests;
	u64 packet_aborts;
	u64 alloc_failures;
	};

	struct io_bdt {
	struct qedf_ioreq *io_req;
	struct fcoe_sge *bd_tbl;
	dma_addr_t bd_tbl_dma;
	u16 bd_valid;
	};

	struct qedf_cmd_mgr {
	struct qedf_ctx *qedf;
	u16 idx;
	struct io_bdt **io_bdt_pool;
	#define FCOE_PARAMS_NUM_TASKS 4096
	struct qedf_ioreq cmds[FCOE_PARAMS_NUM_TASKS];
	spinlock_t lock;
	atomic_t free_list_cnt;
	};

	/* Stolen from qed_cxt_api.h and adapted for qed_fcoe_info
	* Usage:
	*
	* void *ptr;
	* ptr = qedf_get_task_mem(&qedf->tasks, 128);
	*/
	static inline void qedf_get_task_mem(struct qed_fcoe_tid info, u32 tid)
	{
	return (void *)(info->blocks[tid / info->num_tids_per_block] +
	(tid % info->num_tids_per_block) * info->size);
	}

	static inline void qedf_stop_all_io(struct qedf_ctx *qedf)
	{
	set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
	}

	/*
	* Externs
	*/
	#define QEDF_DEFAULT_LOG_MASK 0x3CFB6
	extern const struct qed_fcoe_ops *qed_ops;
	extern uint qedf_dump_frames;
	extern uint qedf_io_tracing;
	extern uint qedf_stop_io_on_error;
	extern uint qedf_link_down_tmo;
	#define QEDF_RETRY_DELAY_MAX 20 /* 2 seconds */
	extern bool qedf_retry_delay;
	extern uint qedf_debug;

	extern struct qedf_cmd_mgr qedf_cmd_mgr_alloc(struct qedf_ctx qedf);
	extern void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr);
	extern int qedf_queuecommand(struct Scsi_Host *host,
	struct scsi_cmnd *sc_cmd);
	extern void qedf_fip_send(struct fcoe_ctlr fip, struct sk_buff skb);
	extern void qedf_update_src_mac(struct fc_lport lport, u8 addr);
	extern u8 qedf_get_src_mac(struct fc_lport lport);
	extern void qedf_fip_recv(struct qedf_ctx qedf, struct sk_buff skb);
	extern void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf);
	extern void qedf_scsi_completion(struct qedf_ctx qedf, struct fcoe_cqe cqe,
	struct qedf_ioreq *io_req);
	extern void qedf_process_warning_compl(struct qedf_ctx *qedf,
	struct fcoe_cqe cqe, struct qedf_ioreq io_req);
	extern void qedf_process_error_detect(struct qedf_ctx *qedf,
	struct fcoe_cqe cqe, struct qedf_ioreq io_req);
	extern void qedf_flush_active_ios(struct qedf_rport *fcport, int lun);
	extern void qedf_release_cmd(struct kref *ref);
	extern int qedf_initiate_abts(struct qedf_ioreq *io_req,
	bool return_scsi_cmd_on_abts);
	extern void qedf_process_abts_compl(struct qedf_ctx qedf, struct fcoe_cqe cqe,
	struct qedf_ioreq *io_req);
	extern struct qedf_ioreq qedf_alloc_cmd(struct qedf_rport fcport,
	u8 cmd_type);

	extern struct device_attribute *qedf_host_attrs[];
	extern void qedf_cmd_timer_set(struct qedf_ctx qedf, struct qedf_ioreq io_req,
	unsigned int timer_msec);
	extern int qedf_init_mp_req(struct qedf_ioreq *io_req);
	extern void qedf_init_mp_task(struct qedf_ioreq *io_req,
	struct fcoe_task_context *task_ctx);
	extern void qedf_add_to_sq(struct qedf_rport *fcport, u16 xid,
	u32 ptu_invalidate, enum fcoe_task_type req_type, u32 offset);
	extern void qedf_ring_doorbell(struct qedf_rport *fcport);
	extern void qedf_process_els_compl(struct qedf_ctx qedf, struct fcoe_cqe cqe,
	struct qedf_ioreq *els_req);
	extern int qedf_send_rrq(struct qedf_ioreq *aborted_io_req);
	extern int qedf_send_adisc(struct qedf_rport fcport, struct fc_frame fp);
	extern int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
	bool return_scsi_cmd_on_abts);
	extern void qedf_process_cleanup_compl(struct qedf_ctx *qedf,
	struct fcoe_cqe cqe, struct qedf_ioreq io_req);
	extern int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags);
	extern void qedf_process_tmf_compl(struct qedf_ctx qedf, struct fcoe_cqe cqe,
	struct qedf_ioreq *io_req);
	extern void qedf_process_cqe(struct qedf_ctx qedf, struct fcoe_cqe cqe);
	extern void qedf_scsi_done(struct qedf_ctx qedf, struct qedf_ioreq io_req,
	int result);
	extern void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id);
	extern void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf);
	extern void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf);
	extern void qedf_capture_grc_dump(struct qedf_ctx *qedf);
	extern void qedf_wait_for_upload(struct qedf_ctx *qedf);
	extern void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx,
	struct fcoe_cqe *cqe);
	extern void qedf_restart_rport(struct qedf_rport *fcport);
	extern int qedf_send_rec(struct qedf_ioreq *orig_io_req);
	extern int qedf_post_io_req(struct qedf_rport *fcport,
	struct qedf_ioreq *io_req);
	extern void qedf_process_seq_cleanup_compl(struct qedf_ctx *qedf,
	struct fcoe_cqe cqe, struct qedf_ioreq io_req);
	extern int qedf_send_flogi(struct qedf_ctx *qedf);
	extern void qedf_fp_io_handler(struct work_struct *work);

	#define FCOE_WORD_TO_BYTE 4
	#define QEDF_MAX_TASK_NUM 0xFFFF

	struct fip_vlan {
	struct ethhdr eth;
	struct fip_header fip;
	struct {
	struct fip_mac_desc mac;
	struct fip_wwn_desc wwnn;
	} desc;
	};

	/* SQ/CQ Sizes */
	#define GBL_RSVD_TASKS 16
	#define NUM_TASKS_PER_CONNECTION 1024
	#define NUM_RW_TASKS_PER_CONNECTION 512
	#define FCOE_PARAMS_CQ_NUM_ENTRIES FCOE_PARAMS_NUM_TASKS

	#define FCOE_PARAMS_CMDQ_NUM_ENTRIES FCOE_PARAMS_NUM_TASKS
	#define SQ_NUM_ENTRIES NUM_TASKS_PER_CONNECTION

	#define QEDF_FCOE_PARAMS_GL_RQ_PI 0
	#define QEDF_FCOE_PARAMS_GL_CMD_PI 1

	#define QEDF_READ (1 << 1)
	#define QEDF_WRITE (1 << 0)
	#define MAX_FIBRE_LUNS 0xffffffff

	#define QEDF_MAX_NUM_CQS 8

	/*
	* PCI function probe defines
	*/
	/* Probe/remove called during normal PCI probe */
	#define QEDF_MODE_NORMAL 0
	/* Probe/remove called from qed error recovery */
	#define QEDF_MODE_RECOVERY 1

	#define SUPPORTED_25000baseKR_Full (1<<27)
	#define SUPPORTED_50000baseKR2_Full (1<<28)
	#define SUPPORTED_100000baseKR4_Full (1<<29)
	#define SUPPORTED_100000baseCR4_Full (1<<30)

	#endif