include/target/target_core_backend.h

   1 #ifndef TARGET_CORE_BACKEND_H
   2 #define TARGET_CORE_BACKEND_H
   3
   4 #define TRANSPORT_FLAG_PASSTHROUGH              1
   5
   6 struct target_backend_ops {
   7         char name[16];
   8         char inquiry_prod[16];
   9         char inquiry_rev[4];
  10         struct module *owner;
  11
  12         u8 transport_flags;
  13
  14         int (*attach_hba)(struct se_hba *, u32);
  15         void (*detach_hba)(struct se_hba *);
  16         int (*pmode_enable_hba)(struct se_hba *, unsigned long);
  17
  18         struct se_device *(*alloc_device)(struct se_hba *, const char *);
  19         int (*configure_device)(struct se_device *);
  20         void (*free_device)(struct se_device *device);
  21
  22         ssize_t (*set_configfs_dev_params)(struct se_device *,
  23                                            const char *, ssize_t);
  24         ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
  25
  26         void (*transport_complete)(struct se_cmd *cmd,
  27                                    struct scatterlist *,
  28                                    unsigned char *);
  29
  30         sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
  31         u32 (*get_device_type)(struct se_device *);
  32         sector_t (*get_blocks)(struct se_device *);
  33         sector_t (*get_alignment_offset_lbas)(struct se_device *);
  34         /* lbppbe = logical blocks per physical block exponent. see SBC-3 */
  35         unsigned int (*get_lbppbe)(struct se_device *);
  36         unsigned int (*get_io_min)(struct se_device *);
  37         unsigned int (*get_io_opt)(struct se_device *);
  38         unsigned char *(*get_sense_buffer)(struct se_cmd *);
  39         bool (*get_write_cache)(struct se_device *);
  40         int (*init_prot)(struct se_device *);
  41         int (*format_prot)(struct se_device *);
  42         void (*free_prot)(struct se_device *);
  43
  44         struct configfs_attribute **tb_dev_attrib_attrs;
  45 };
  46
  47 struct sbc_ops {
  48         sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
  49                                      u32, enum dma_data_direction);
  50         sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
  51         sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
  52         sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
  53                                 sector_t lba, sector_t nolb);
  54 };
  55
  56 int     transport_backend_register(const struct target_backend_ops *);
  57 void    target_backend_unregister(const struct target_backend_ops *);
  58
  59 void    target_complete_cmd(struct se_cmd *, u8);
  60 void    target_complete_cmd_with_length(struct se_cmd *, u8, int);
  61
  62 sense_reason_t  spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
  63 sense_reason_t  spc_emulate_report_luns(struct se_cmd *cmd);
  64 sense_reason_t  spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
  65 sense_reason_t  spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
  66
  67 sense_reason_t  sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
  68 u32     sbc_get_device_rev(struct se_device *dev);
  69 u32     sbc_get_device_type(struct se_device *dev);
  70 sector_t        sbc_get_write_same_sectors(struct se_cmd *cmd);
  71 void    sbc_dif_generate(struct se_cmd *);
  72 sense_reason_t  sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
  73                                      unsigned int, struct scatterlist *, int);
  74 void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
  75                        struct scatterlist *, int);
  76 void    transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
  77 int     transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
  78 int     transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
  79 int     transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
  80
  81 extern struct configfs_attribute *sbc_attrib_attrs[];
  82 extern struct configfs_attribute *passthrough_attrib_attrs[];
  83
  84 /* core helpers also used by command snooping in pscsi */
  85 void    *transport_kmap_data_sg(struct se_cmd *);
  86 void    transport_kunmap_data_sg(struct se_cmd *);
  87 /* core helpers also used by xcopy during internal command setup */
  88 int     target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
  89 sense_reason_t  transport_generic_map_mem_to_cmd(struct se_cmd *,
  90                 struct scatterlist *, u32, struct scatterlist *, u32);
  91
  92 bool    target_lun_is_rdonly(struct se_cmd *);
  93 sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
  94         sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
  95
  96 bool target_sense_desc_format(struct se_device *dev);
  97 sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
  98 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
  99                                        struct request_queue *q, int block_size);
 100
 101 #endif /* TARGET_CORE_BACKEND_H */