1 #ifndef TARGET_CORE_BACKEND_H 2 #define TARGET_CORE_BACKEND_H 3 4 #include <linux/types.h> 5 #include <target/target_core_base.h> 6 7 #define TRANSPORT_FLAG_PASSTHROUGH 1 8 9 struct request_queue; 10 struct scatterlist; 11 12 struct target_backend_ops { 13 char name[16]; 14 char inquiry_prod[16]; 15 char inquiry_rev[4]; 16 struct module *owner; 17 18 u8 transport_flags; 19 20 int (*attach_hba)(struct se_hba *, u32); 21 void (*detach_hba)(struct se_hba *); 22 int (*pmode_enable_hba)(struct se_hba *, unsigned long); 23 24 struct se_device *(*alloc_device)(struct se_hba *, const char *); 25 int (*configure_device)(struct se_device *); 26 void (*free_device)(struct se_device *device); 27 28 ssize_t (*set_configfs_dev_params)(struct se_device *, 29 const char *, ssize_t); 30 ssize_t (*show_configfs_dev_params)(struct se_device *, char *); 31 32 void (*transport_complete)(struct se_cmd *cmd, 33 struct scatterlist *, 34 unsigned char *); 35 36 sense_reason_t (*parse_cdb)(struct se_cmd *cmd); 37 u32 (*get_device_type)(struct se_device *); 38 sector_t (*get_blocks)(struct se_device *); 39 sector_t (*get_alignment_offset_lbas)(struct se_device *); 40 /* lbppbe = logical blocks per physical block exponent. see SBC-3 */ 41 unsigned int (*get_lbppbe)(struct se_device *); 42 unsigned int (*get_io_min)(struct se_device *); 43 unsigned int (*get_io_opt)(struct se_device *); 44 unsigned char *(*get_sense_buffer)(struct se_cmd *); 45 bool (*get_write_cache)(struct se_device *); 46 int (*init_prot)(struct se_device *); 47 int (*format_prot)(struct se_device *); 48 void (*free_prot)(struct se_device *); 49 50 struct configfs_attribute **tb_dev_attrib_attrs; 51 }; 52 53 struct sbc_ops { 54 sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *, 55 u32, enum dma_data_direction); 56 sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd); 57 sense_reason_t (*execute_write_same)(struct se_cmd *cmd); 58 sense_reason_t (*execute_unmap)(struct se_cmd *cmd, 59 sector_t lba, sector_t nolb); 60 }; 61 62 int transport_backend_register(const struct target_backend_ops *); 63 void target_backend_unregister(const struct target_backend_ops *); 64 65 void target_complete_cmd(struct se_cmd *, u8); 66 void target_complete_cmd_with_length(struct se_cmd *, u8, int); 67 68 sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size); 69 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd); 70 sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *); 71 sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *); 72 73 sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops); 74 u32 sbc_get_device_rev(struct se_device *dev); 75 u32 sbc_get_device_type(struct se_device *dev); 76 sector_t sbc_get_write_same_sectors(struct se_cmd *cmd); 77 void sbc_dif_generate(struct se_cmd *); 78 sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int, 79 unsigned int, struct scatterlist *, int); 80 void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool, 81 struct scatterlist *, int); 82 void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *); 83 int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *); 84 int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *); 85 int transport_set_vpd_ident(struct t10_vpd *, unsigned char *); 86 87 extern struct configfs_attribute *sbc_attrib_attrs[]; 88 extern struct configfs_attribute *passthrough_attrib_attrs[]; 89 90 /* core helpers also used by command snooping in pscsi */ 91 void *transport_kmap_data_sg(struct se_cmd *); 92 void transport_kunmap_data_sg(struct se_cmd *); 93 /* core helpers also used by xcopy during internal command setup */ 94 sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *, 95 struct scatterlist *, u32, struct scatterlist *, u32); 96 97 bool target_lun_is_rdonly(struct se_cmd *); 98 sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd, 99 sense_reason_t (*exec_cmd)(struct se_cmd *cmd)); 100 101 bool target_sense_desc_format(struct se_device *dev); 102 sector_t target_to_linux_sector(struct se_device *dev, sector_t lb); 103 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, 104 struct request_queue *q); 105 106 #endif /* TARGET_CORE_BACKEND_H */ 107