1#ifndef TARGET_CORE_BACKEND_H
  2#define TARGET_CORE_BACKEND_H
  3
  4#define TRANSPORT_FLAG_PASSTHROUGH		1
  5
  6struct 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
 47struct 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
 56int	transport_backend_register(const struct target_backend_ops *);
 57void	target_backend_unregister(const struct target_backend_ops *);
 58
 59void	target_complete_cmd(struct se_cmd *, u8);
 60void	target_complete_cmd_with_length(struct se_cmd *, u8, int);
 61
 62sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
 63sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
 64sense_reason_t	spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
 65sense_reason_t	spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
 66
 67sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
 68u32	sbc_get_device_rev(struct se_device *dev);
 69u32	sbc_get_device_type(struct se_device *dev);
 70sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
 71void	sbc_dif_generate(struct se_cmd *);
 72sense_reason_t	sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
 73				     unsigned int, struct scatterlist *, int);
 74void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
 75		       struct scatterlist *, int);
 76void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 77int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
 78int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
 79int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
 80
 81extern struct configfs_attribute *sbc_attrib_attrs[];
 82extern struct configfs_attribute *passthrough_attrib_attrs[];
 83
 84/* core helpers also used by command snooping in pscsi */
 85void	*transport_kmap_data_sg(struct se_cmd *);
 86void	transport_kunmap_data_sg(struct se_cmd *);
 87/* core helpers also used by xcopy during internal command setup */
 88int	target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
 89sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
 90		struct scatterlist *, u32, struct scatterlist *, u32);
 91
 92bool	target_lun_is_rdonly(struct se_cmd *);
 93sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
 94	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
 95
 96bool target_sense_desc_format(struct se_device *dev);
 97sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
 98bool 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 */