LXR linux/include/target/target_core

   1#ifndef TARGET_CORE_BACKEND_H
   2#define TARGET_CORE_BACKEND_H
   3
   4#define TRANSPORT_FLAG_PASSTHROUGH              1
   5
   6struct target_backend_cits {
   7        struct config_item_type tb_dev_cit;
   8        struct config_item_type tb_dev_attrib_cit;
   9        struct config_item_type tb_dev_pr_cit;
  10        struct config_item_type tb_dev_wwn_cit;
  11        struct config_item_type tb_dev_alua_tg_pt_gps_cit;
  12        struct config_item_type tb_dev_stat_cit;
  13};
  14
  15struct se_subsystem_api {
  16        struct list_head sub_api_list;
  17
  18        char name[16];
  19        char inquiry_prod[16];
  20        char inquiry_rev[4];
  21        struct module *owner;
  22
  23        u8 transport_flags;
  24
  25        int (*attach_hba)(struct se_hba *, u32);
  26        void (*detach_hba)(struct se_hba *);
  27        int (*pmode_enable_hba)(struct se_hba *, unsigned long);
  28
  29        struct se_device *(*alloc_device)(struct se_hba *, const char *);
  30        int (*configure_device)(struct se_device *);
  31        void (*free_device)(struct se_device *device);
  32
  33        ssize_t (*set_configfs_dev_params)(struct se_device *,
  34                                           const char *, ssize_t);
  35        ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
  36
  37        void (*transport_complete)(struct se_cmd *cmd,
  38                                   struct scatterlist *,
  39                                   unsigned char *);
  40
  41        sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
  42        u32 (*get_device_type)(struct se_device *);
  43        sector_t (*get_blocks)(struct se_device *);
  44        sector_t (*get_alignment_offset_lbas)(struct se_device *);
  45        /* lbppbe = logical blocks per physical block exponent. see SBC-3 */
  46        unsigned int (*get_lbppbe)(struct se_device *);
  47        unsigned int (*get_io_min)(struct se_device *);
  48        unsigned int (*get_io_opt)(struct se_device *);
  49        unsigned char *(*get_sense_buffer)(struct se_cmd *);
  50        bool (*get_write_cache)(struct se_device *);
  51        int (*init_prot)(struct se_device *);
  52        int (*format_prot)(struct se_device *);
  53        void (*free_prot)(struct se_device *);
  54
  55        struct target_backend_cits tb_cits;
  56};
  57
  58struct sbc_ops {
  59        sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
  60                                     u32, enum dma_data_direction);
  61        sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
  62        sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
  63        sense_reason_t (*execute_write_same_unmap)(struct se_cmd *cmd);
  64        sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
  65};
  66
  67int     transport_subsystem_register(struct se_subsystem_api *);
  68void    transport_subsystem_release(struct se_subsystem_api *);
  69
  70void    target_complete_cmd(struct se_cmd *, u8);
  71void    target_complete_cmd_with_length(struct se_cmd *, u8, int);
  72
  73sense_reason_t  spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
  74sense_reason_t  spc_emulate_report_luns(struct se_cmd *cmd);
  75sense_reason_t  spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
  76sense_reason_t  spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
  77
  78sense_reason_t  sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
  79u32     sbc_get_device_rev(struct se_device *dev);
  80u32     sbc_get_device_type(struct se_device *dev);
  81sector_t        sbc_get_write_same_sectors(struct se_cmd *cmd);
  82sense_reason_t sbc_execute_unmap(struct se_cmd *cmd,
  83        sense_reason_t (*do_unmap_fn)(struct se_cmd *cmd, void *priv,
  84                                      sector_t lba, sector_t nolb),
  85        void *priv);
  86void    sbc_dif_generate(struct se_cmd *);
  87sense_reason_t  sbc_dif_verify_write(struct se_cmd *, sector_t, unsigned int,
  88                                     unsigned int, struct scatterlist *, int);
  89sense_reason_t  sbc_dif_verify_read(struct se_cmd *, sector_t, unsigned int,
  90                                    unsigned int, struct scatterlist *, int);
  91sense_reason_t  sbc_dif_read_strip(struct se_cmd *);
  92
  93void    transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
  94int     transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
  95int     transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
  96int     transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
  97
  98/* core helpers also used by command snooping in pscsi */
  99void    *transport_kmap_data_sg(struct se_cmd *);
 100void    transport_kunmap_data_sg(struct se_cmd *);
 101/* core helpers also used by xcopy during internal command setup */
 102int     target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
 103sense_reason_t  transport_generic_map_mem_to_cmd(struct se_cmd *,
 104                struct scatterlist *, u32, struct scatterlist *, u32);
 105
 106void    array_free(void *array, int n);
 107
 108/* From target_core_configfs.c to setup default backend config_item_types */
 109void    target_core_setup_sub_cits(struct se_subsystem_api *);
 110
 111/* attribute helpers from target_core_device.c for backend drivers */
 112bool    se_dev_check_wce(struct se_device *);
 113int     se_dev_set_max_unmap_lba_count(struct se_device *, u32);
 114int     se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
 115int     se_dev_set_unmap_granularity(struct se_device *, u32);
 116int     se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
 117int     se_dev_set_max_write_same_len(struct se_device *, u32);
 118int     se_dev_set_emulate_model_alias(struct se_device *, int);
 119int     se_dev_set_emulate_dpo(struct se_device *, int);
 120int     se_dev_set_emulate_fua_write(struct se_device *, int);
 121int     se_dev_set_emulate_fua_read(struct se_device *, int);
 122int     se_dev_set_emulate_write_cache(struct se_device *, int);
 123int     se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
 124int     se_dev_set_emulate_tas(struct se_device *, int);
 125int     se_dev_set_emulate_tpu(struct se_device *, int);
 126int     se_dev_set_emulate_tpws(struct se_device *, int);
 127int     se_dev_set_emulate_caw(struct se_device *, int);
 128int     se_dev_set_emulate_3pc(struct se_device *, int);
 129int     se_dev_set_pi_prot_type(struct se_device *, int);
 130int     se_dev_set_pi_prot_format(struct se_device *, int);
 131int     se_dev_set_enforce_pr_isids(struct se_device *, int);
 132int     se_dev_set_force_pr_aptpl(struct se_device *, int);
 133int     se_dev_set_is_nonrot(struct se_device *, int);
 134int     se_dev_set_emulate_rest_reord(struct se_device *dev, int);
 135int     se_dev_set_queue_depth(struct se_device *, u32);
 136int     se_dev_set_max_sectors(struct se_device *, u32);
 137int     se_dev_set_optimal_sectors(struct se_device *, u32);
 138int     se_dev_set_block_size(struct se_device *, u32);
 139sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
 140        sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
 141
 142#endif /* TARGET_CORE_BACKEND_H */
 143