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 #define TRANSPORT_FLAG_PASSTHROUGH_PGR 0x4 14 15 struct request_queue; 16 struct scatterlist; 17 18 struct target_backend_ops { 19 char name[16]; 20 char inquiry_prod[16]; 21 char inquiry_rev[4]; 22 struct module *owner; 23 24 u8 transport_flags; 25 26 int (*attach_hba)(struct se_hba *, u32); 27 void (*detach_hba)(struct se_hba *); 28 int (*pmode_enable_hba)(struct se_hba *, unsigned long); 29 30 struct se_device *(*alloc_device)(struct se_hba *, const char *); 31 int (*configure_device)(struct se_device *); 32 void (*free_device)(struct se_device *device); 33 34 ssize_t (*set_configfs_dev_params)(struct se_device *, 35 const char *, ssize_t); 36 ssize_t (*show_configfs_dev_params)(struct se_device *, char *); 37 38 void (*transport_complete)(struct se_cmd *cmd, 39 struct scatterlist *, 40 unsigned char *); 41 42 sense_reason_t (*parse_cdb)(struct se_cmd *cmd); 43 u32 (*get_device_type)(struct se_device *); 44 sector_t (*get_blocks)(struct se_device *); 45 sector_t (*get_alignment_offset_lbas)(struct se_device *); 46 /* lbppbe = logical blocks per physical block exponent. see SBC-3 */ 47 unsigned int (*get_lbppbe)(struct se_device *); 48 unsigned int (*get_io_min)(struct se_device *); 49 unsigned int (*get_io_opt)(struct se_device *); 50 unsigned char *(*get_sense_buffer)(struct se_cmd *); 51 bool (*get_write_cache)(struct se_device *); 52 int (*init_prot)(struct se_device *); 53 int (*format_prot)(struct se_device *); 54 void (*free_prot)(struct se_device *); 55 56 struct configfs_attribute **tb_dev_attrib_attrs; 57 }; 58 59 struct sbc_ops { 60 sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *, 61 u32, enum dma_data_direction); 62 sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd); 63 sense_reason_t (*execute_write_same)(struct se_cmd *cmd); 64 sense_reason_t (*execute_unmap)(struct se_cmd *cmd, 65 sector_t lba, sector_t nolb); 66 }; 67 68 int transport_backend_register(const struct target_backend_ops *); 69 void target_backend_unregister(const struct target_backend_ops *); 70 71 void target_complete_cmd(struct se_cmd *, u8); 72 void target_complete_cmd_with_length(struct se_cmd *, u8, int); 73 74 sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size); 75 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd); 76 sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *); 77 sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *); 78 79 sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops); 80 u32 sbc_get_device_rev(struct se_device *dev); 81 u32 sbc_get_device_type(struct se_device *dev); 82 sector_t sbc_get_write_same_sectors(struct se_cmd *cmd); 83 void sbc_dif_generate(struct se_cmd *); 84 sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int, 85 unsigned int, struct scatterlist *, int); 86 void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool, 87 struct scatterlist *, int); 88 void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *); 89 int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *); 90 int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *); 91 int transport_set_vpd_ident(struct t10_vpd *, unsigned char *); 92 93 extern struct configfs_attribute *sbc_attrib_attrs[]; 94 extern struct configfs_attribute *passthrough_attrib_attrs[]; 95 96 /* core helpers also used by command snooping in pscsi */ 97 void *transport_kmap_data_sg(struct se_cmd *); 98 void transport_kunmap_data_sg(struct se_cmd *); 99 /* core helpers also used by xcopy during internal command setup */ 100 sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *, 101 struct scatterlist *, u32, struct scatterlist *, u32); 102 103 bool target_lun_is_rdonly(struct se_cmd *); 104 sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd, 105 sense_reason_t (*exec_cmd)(struct se_cmd *cmd)); 106 107 bool target_sense_desc_format(struct se_device *dev); 108 sector_t target_to_linux_sector(struct se_device *dev, sector_t lb); 109 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, 110 struct request_queue *q); 111 112 #endif /* TARGET_CORE_BACKEND_H */ 113