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