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linux/drivers/scsi/qedf/qedf.h
Saurav Kashyap f6d63678b0 scsi: qedf: Decrease the LL2 MTU size to 2500 
Decrease the LL2 MTU size to 2500.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-29 18:51:19 -04:00

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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016-2018 Cavium Inc.
*/
#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"
#include "drv_fcoe_fw_funcs.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_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 * 1000)
#define QEDF_CLEANUP_TIMEOUT 1
#define QEDF_MAX_CDB_LEN 16
#define QEDF_LL2_BUF_SIZE 2500 /* Buffer size required for LL2 Rx */
#define UPSTREAM_REMOVE 1
#define UPSTREAM_KEEP 1
struct qedf_mp_req {
uint32_t req_len;
void *req_buf;
dma_addr_t req_buf_dma;
struct scsi_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 scsi_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_NONE,
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;
#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
#define QEDF_CMD_DIRTY 0x4
#define QEDF_CMD_ERR_SCSI_DONE 0x5
u8 io_req_flags;
uint8_t tm_flags;
struct qedf_rport *fcport;
#define QEDF_CMD_ST_INACTIVE 0
#define QEDFC_CMD_ST_IO_ACTIVE 1
#define QEDFC_CMD_ST_ABORT_ACTIVE 2
#define QEDFC_CMD_ST_ABORT_ACTIVE_EH 3
#define QEDFC_CMD_ST_CLEANUP_ACTIVE 4
#define QEDFC_CMD_ST_CLEANUP_ACTIVE_EH 5
#define QEDFC_CMD_ST_RRQ_ACTIVE 6
#define QEDFC_CMD_ST_RRQ_WAIT 7
#define QEDFC_CMD_ST_OXID_RETIRE_WAIT 8
#define QEDFC_CMD_ST_TMF_ACTIVE 9
#define QEDFC_CMD_ST_DRAIN_ACTIVE 10
#define QEDFC_CMD_ST_CLEANED 11
#define QEDFC_CMD_ST_ELS_ACTIVE 12
atomic_t state;
unsigned long flags;
enum qedf_ioreq_event event;
size_t data_xfer_len;
/* ID: 001: Alloc cmd (qedf_alloc_cmd) */
/* ID: 002: Initiate ABTS (qedf_initiate_abts) */
/* ID: 003: For RRQ (qedf_process_abts_compl) */
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 completion cleanup_done;
struct e4_fcoe_task_context *task;
struct fcoe_task_params *task_params;
struct scsi_sgl_task_params *sgl_task_params;
int idx;
int lun;
/*
* 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_UNKNOWN_SGE 1
#define QEDF_IOREQ_SLOW_SGE 2
#define QEDF_IOREQ_FAST_SGE 3
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;
unsigned int alloc;
};
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
#define QEDF_RPORT_IN_RESET 3
#define QEDF_RPORT_IN_LUN_RESET 4
#define QEDF_RPORT_IN_TARGET_RESET 5
unsigned long flags;
int lun_reset_lun;
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 ios_to_queue;
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 0
#define QEDF_RPORT_TYPE_TAPE 1
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;
unsigned 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;
#define QEDF_NULL_VLAN_ID -1
#define QEDF_FALLBACK_VLAN 1002
#define QEDF_DEFAULT_PRIO 3
int vlan_id;
u8 prio;
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;
struct delayed_work grcdump_work;
u32 slow_sge_ios;
u32 fast_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 */
struct mutex stats_mutex;
u64 input_requests;
u64 output_requests;
u64 control_requests;
u64 packet_aborts;
u64 alloc_failures;
u8 lun_resets;
u8 target_resets;
u8 task_set_fulls;
u8 busy;
/* Used for flush routine */
struct mutex flush_mutex;
};
struct io_bdt {
struct qedf_ioreq *io_req;
struct scsi_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 2048
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
*/
/*
* (QEDF_LOG_NPIV | QEDF_LOG_SESS | QEDF_LOG_LPORT | QEDF_LOG_ELS | QEDF_LOG_MQ
* | QEDF_LOG_IO | QEDF_LOG_UNSOL | QEDF_LOG_SCSI_TM | QEDF_LOG_MP_REQ |
* QEDF_LOG_EVT | QEDF_LOG_CONN | QEDF_LOG_DISC | QEDF_LOG_INFO)
*/
#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 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 e4_fcoe_task_context *task_ctx, struct fcoe_wqe *sqe);
extern u16 qedf_get_sqe_idx(struct qedf_rport *fcport);
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);
bool 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_get_protocol_tlv_data(void *dev, void *data);
extern void qedf_fp_io_handler(struct work_struct *work);
extern void qedf_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data);
extern void qedf_wq_grcdump(struct work_struct *work);
void qedf_stag_change_work(struct work_struct *work);
void qedf_ctx_soft_reset(struct fc_lport *lport);
#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 MIN_NUM_CPUS_MSIX(x) min_t(u32, x->dev_info.num_cqs, \
num_online_cpus())
/*
* 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
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