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
  9struct request_queue;
 10struct scatterlist;
 11
 12struct 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
 53struct 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
 62int	transport_backend_register(const struct target_backend_ops *);
 63void	target_backend_unregister(const struct target_backend_ops *);
 64
 65void	target_complete_cmd(struct se_cmd *, u8);
 66void	target_complete_cmd_with_length(struct se_cmd *, u8, int);
 67
 68sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
 69sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
 70sense_reason_t	spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
 71sense_reason_t	spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
 72
 73sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
 74u32	sbc_get_device_rev(struct se_device *dev);
 75u32	sbc_get_device_type(struct se_device *dev);
 76sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
 77void	sbc_dif_generate(struct se_cmd *);
 78sense_reason_t	sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
 79				     unsigned int, struct scatterlist *, int);
 80void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
 81		       struct scatterlist *, int);
 82void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 83int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
 84int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
 85int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
 86
 87extern struct configfs_attribute *sbc_attrib_attrs[];
 88extern struct configfs_attribute *passthrough_attrib_attrs[];
 89
 90/* core helpers also used by command snooping in pscsi */
 91void	*transport_kmap_data_sg(struct se_cmd *);
 92void	transport_kunmap_data_sg(struct se_cmd *);
 93/* core helpers also used by xcopy during internal command setup */
 94sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
 95		struct scatterlist *, u32, struct scatterlist *, u32);
 96
 97bool	target_lun_is_rdonly(struct se_cmd *);
 98sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
 99	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
100
101bool target_sense_desc_format(struct se_device *dev);
102sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
103bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
104				       struct request_queue *q);
105
106#endif /* TARGET_CORE_BACKEND_H */