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 0x1 8 /* 9 * ALUA commands, state checks and setup operations are handled by the 10 * backend module. 11 */ 12 #define TRANSPORT_FLAG_PASSTHROUGH_ALUA 0x2 13 14 struct request_queue; 15 struct scatterlist; 16 17 struct target_backend_ops { 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 configfs_attribute **tb_dev_attrib_attrs; 56 }; 57 58 struct 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_unmap)(struct se_cmd *cmd, 64 sector_t lba, sector_t nolb); 65 }; 66 67 int transport_backend_register(const struct target_backend_ops *); 68 void target_backend_unregister(const struct target_backend_ops *); 69 70 void target_complete_cmd(struct se_cmd *, u8); 71 void target_complete_cmd_with_length(struct se_cmd *, u8, int); 72 73 sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size); 74 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd); 75 sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *); 76 sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *); 77 78 sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops); 79 u32 sbc_get_device_rev(struct se_device *dev); 80 u32 sbc_get_device_type(struct se_device *dev); 81 sector_t sbc_get_write_same_sectors(struct se_cmd *cmd); 82 void sbc_dif_generate(struct se_cmd *); 83 sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int, 84 unsigned int, struct scatterlist *, int); 85 void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool, 86 struct scatterlist *, int); 87 void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *); 88 int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *); 89 int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *); 90 int transport_set_vpd_ident(struct t10_vpd *, unsigned char *); 91 92 extern struct configfs_attribute *sbc_attrib_attrs[]; 93 extern struct configfs_attribute *passthrough_attrib_attrs[]; 94 95 /* core helpers also used by command snooping in pscsi */ 96 void *transport_kmap_data_sg(struct se_cmd *); 97 void transport_kunmap_data_sg(struct se_cmd *); 98 /* core helpers also used by xcopy during internal command setup */ 99 sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *, 100 struct scatterlist *, u32, struct scatterlist *, u32); 101 102 bool target_lun_is_rdonly(struct se_cmd *); 103 sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd, 104 sense_reason_t (*exec_cmd)(struct se_cmd *cmd)); 105 106 bool target_sense_desc_format(struct se_device *dev); 107 sector_t target_to_linux_sector(struct se_device *dev, sector_t lb); 108 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, 109 struct request_queue *q); 110 111 #endif /* TARGET_CORE_BACKEND_H */ 112