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scsi: elx: efct: LIO backend interface routines

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Add LIO backend template registration and template functions.

Link: https://lore.kernel.org/r/20210601235512.20104-26-jsmart2021@gmail.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Co-developed-by: Ram Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: Ram Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2021-06-01 16:55:06 -07:00 committed by Martin K. Petersen
parent 3e6414003b
commit 692e5d73a8
2 changed files with 1887 additions and 0 deletions
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1698
drivers/scsi/elx/efct/efct_lio.c Normal file
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drivers/scsi/elx/efct/efct_lio.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
*/
#ifndef __EFCT_LIO_H__
#define __EFCT_LIO_H__
#include "efct_scsi.h"
#include <target/target_core_base.h>
#define efct_lio_io_printf(io, fmt, ...) \
efc_log_debug(io->efct, \
"[%s] [%04x][i:%04x t:%04x h:%04x]" fmt,\
io->node->display_name, io->instance_index, \
io->init_task_tag, io->tgt_task_tag, io->hw_tag,\
##__VA_ARGS__)
#define efct_lio_tmfio_printf(io, fmt, ...) \
efc_log_debug(io->efct, \
"[%s] [%04x][i:%04x t:%04x h:%04x][f:%02x]" fmt,\
io->node->display_name, io->instance_index, \
io->init_task_tag, io->tgt_task_tag, io->hw_tag,\
io->tgt_io.tmf, ##__VA_ARGS__)
#define efct_set_lio_io_state(io, value) (io->tgt_io.state |= value)
struct efct_lio_wq_data {
struct efct *efct;
void *ptr;
struct work_struct work;
};
/* Target private efct structure */
struct efct_scsi_tgt {
u32 max_sge;
u32 max_sgl;
/*
* Variables used to send task set full. We are using a high watermark
* method to send task set full. We will reserve a fixed number of IOs
* per initiator plus a fudge factor. Once we reach this number,
* then the target will start sending task set full/busy responses.
*/
atomic_t initiator_count;
atomic_t ios_in_use;
atomic_t io_high_watermark;
atomic_t watermark_hit;
int watermark_min;
int watermark_max;
struct efct_lio_nport *lio_nport;
struct efct_lio_tpg *tpg;
struct list_head vport_list;
/* Protects vport list*/
spinlock_t efct_lio_lock;
u64 wwnn;
};
struct efct_scsi_tgt_nport {
struct efct_lio_nport *lio_nport;
};
struct efct_node {
struct list_head list_entry;
struct kref ref;
void (*release)(struct kref *arg);
struct efct *efct;
struct efc_node *node;
struct se_session *session;
spinlock_t active_ios_lock;
struct list_head active_ios;
char display_name[EFC_NAME_LENGTH];
u32 port_fc_id;
u32 node_fc_id;
u32 vpi;
u32 rpi;
u32 abort_cnt;
};
#define EFCT_LIO_STATE_SCSI_RECV_CMD (1 << 0)
#define EFCT_LIO_STATE_TGT_SUBMIT_CMD (1 << 1)
#define EFCT_LIO_STATE_TFO_QUEUE_DATA_IN (1 << 2)
#define EFCT_LIO_STATE_TFO_WRITE_PENDING (1 << 3)
#define EFCT_LIO_STATE_TGT_EXECUTE_CMD (1 << 4)
#define EFCT_LIO_STATE_SCSI_SEND_RD_DATA (1 << 5)
#define EFCT_LIO_STATE_TFO_CHK_STOP_FREE (1 << 6)
#define EFCT_LIO_STATE_SCSI_DATA_DONE (1 << 7)
#define EFCT_LIO_STATE_TFO_QUEUE_STATUS (1 << 8)
#define EFCT_LIO_STATE_SCSI_SEND_RSP (1 << 9)
#define EFCT_LIO_STATE_SCSI_RSP_DONE (1 << 10)
#define EFCT_LIO_STATE_TGT_GENERIC_FREE (1 << 11)
#define EFCT_LIO_STATE_SCSI_RECV_TMF (1 << 12)
#define EFCT_LIO_STATE_TGT_SUBMIT_TMR (1 << 13)
#define EFCT_LIO_STATE_TFO_WRITE_PEND_STATUS (1 << 14)
#define EFCT_LIO_STATE_TGT_GENERIC_REQ_FAILURE (1 << 15)
#define EFCT_LIO_STATE_TFO_ABORTED_TASK (1 << 29)
#define EFCT_LIO_STATE_TFO_RELEASE_CMD (1 << 30)
#define EFCT_LIO_STATE_SCSI_CMPL_CMD (1u << 31)
struct efct_scsi_tgt_io {
struct se_cmd cmd;
unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER];
enum dma_data_direction ddir;
int task_attr;
u64 lun;
u32 state;
u8 tmf;
struct efct_io *io_to_abort;
u32 seg_map_cnt;
u32 seg_cnt;
u32 cur_seg;
enum efct_scsi_io_status err;
bool aborting;
bool rsp_sent;
u32 transferred_len;
};
/* Handler return codes */
enum {
SCSI_HANDLER_DATAPHASE_STARTED = 1,
SCSI_HANDLER_RESP_STARTED,
SCSI_HANDLER_VALIDATED_DATAPHASE_STARTED,
SCSI_CMD_NOT_SUPPORTED,
};
#define WWN_NAME_LEN 32
struct efct_lio_vport {
u64 wwpn;
u64 npiv_wwpn;
u64 npiv_wwnn;
unsigned char wwpn_str[WWN_NAME_LEN];
struct se_wwn vport_wwn;
struct efct_lio_tpg *tpg;
struct efct *efct;
struct Scsi_Host *shost;
struct fc_vport *fc_vport;
atomic_t enable;
};
struct efct_lio_nport {
u64 wwpn;
unsigned char wwpn_str[WWN_NAME_LEN];
struct se_wwn nport_wwn;
struct efct_lio_tpg *tpg;
struct efct *efct;
atomic_t enable;
};
struct efct_lio_tpg_attrib {
u32 generate_node_acls;
u32 cache_dynamic_acls;
u32 demo_mode_write_protect;
u32 prod_mode_write_protect;
u32 demo_mode_login_only;
bool session_deletion_wait;
};
struct efct_lio_tpg {
struct se_portal_group tpg;
struct efct_lio_nport *nport;
struct efct_lio_vport *vport;
struct efct_lio_tpg_attrib tpg_attrib;
unsigned short tpgt;
bool enabled;
};
struct efct_lio_nacl {
u64 nport_wwnn;
char nport_name[WWN_NAME_LEN];
struct se_session *session;
struct se_node_acl se_node_acl;
};
struct efct_lio_vport_list_t {
struct list_head list_entry;
struct efct_lio_vport *lio_vport;
};
int efct_scsi_tgt_driver_init(void);
int efct_scsi_tgt_driver_exit(void);
#endif /*__EFCT_LIO_H__ */