Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
new file mode 100644
index 000000000..ce2fba49c
--- /dev/null
+++ b/include/target/target_core_backend.h
@@ -0,0 +1,124 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef TARGET_CORE_BACKEND_H
+#define TARGET_CORE_BACKEND_H
+
+#include <linux/types.h>
+#include <asm/unaligned.h>
+#include <target/target_core_base.h>
+
+#define TRANSPORT_FLAG_PASSTHROUGH		0x1
+/*
+ * ALUA commands, state checks and setup operations are handled by the
+ * backend module.
+ */
+#define TRANSPORT_FLAG_PASSTHROUGH_ALUA		0x2
+#define TRANSPORT_FLAG_PASSTHROUGH_PGR          0x4
+
+struct request_queue;
+struct scatterlist;
+
+struct target_backend_ops {
+	char name[16];
+	char inquiry_prod[16];
+	char inquiry_rev[4];
+	struct module *owner;
+
+	u8 transport_flags_default;
+	u8 transport_flags_changeable;
+
+	int (*attach_hba)(struct se_hba *, u32);
+	void (*detach_hba)(struct se_hba *);
+	int (*pmode_enable_hba)(struct se_hba *, unsigned long);
+
+	struct se_device *(*alloc_device)(struct se_hba *, const char *);
+	int (*configure_device)(struct se_device *);
+	void (*destroy_device)(struct se_device *);
+	void (*free_device)(struct se_device *device);
+
+	ssize_t (*set_configfs_dev_params)(struct se_device *,
+					   const char *, ssize_t);
+	ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
+
+	sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
+	void (*tmr_notify)(struct se_device *se_dev, enum tcm_tmreq_table,
+			   struct list_head *aborted_cmds);
+	u32 (*get_device_type)(struct se_device *);
+	sector_t (*get_blocks)(struct se_device *);
+	sector_t (*get_alignment_offset_lbas)(struct se_device *);
+	/* lbppbe = logical blocks per physical block exponent. see SBC-3 */
+	unsigned int (*get_lbppbe)(struct se_device *);
+	unsigned int (*get_io_min)(struct se_device *);
+	unsigned int (*get_io_opt)(struct se_device *);
+	unsigned char *(*get_sense_buffer)(struct se_cmd *);
+	bool (*get_write_cache)(struct se_device *);
+	int (*init_prot)(struct se_device *);
+	int (*format_prot)(struct se_device *);
+	void (*free_prot)(struct se_device *);
+
+	struct configfs_attribute **tb_dev_attrib_attrs;
+	struct configfs_attribute **tb_dev_action_attrs;
+};
+
+struct sbc_ops {
+	sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
+				     u32, enum dma_data_direction);
+	sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
+	sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
+	sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
+				sector_t lba, sector_t nolb);
+};
+
+int	transport_backend_register(const struct target_backend_ops *);
+void	target_backend_unregister(const struct target_backend_ops *);
+
+void	target_complete_cmd(struct se_cmd *, u8);
+void	target_set_cmd_data_length(struct se_cmd *, int);
+void	target_complete_cmd_with_length(struct se_cmd *, u8, int);
+
+void	transport_copy_sense_to_cmd(struct se_cmd *, unsigned char *);
+
+sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
+sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
+sense_reason_t	spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
+sense_reason_t	spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
+
+sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
+u32	sbc_get_device_rev(struct se_device *dev);
+u32	sbc_get_device_type(struct se_device *dev);
+sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
+void	sbc_dif_generate(struct se_cmd *);
+sense_reason_t	sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
+				     unsigned int, struct scatterlist *, int);
+void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
+		       struct scatterlist *, int);
+void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
+int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
+int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
+int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
+
+extern struct configfs_attribute *sbc_attrib_attrs[];
+extern struct configfs_attribute *passthrough_attrib_attrs[];
+extern struct configfs_attribute *passthrough_pr_attrib_attrs[];
+
+/* core helpers also used by command snooping in pscsi */
+void	*transport_kmap_data_sg(struct se_cmd *);
+void	transport_kunmap_data_sg(struct se_cmd *);
+/* core helpers also used by xcopy during internal command setup */
+sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
+		struct scatterlist *, u32, struct scatterlist *, u32);
+
+bool	target_lun_is_rdonly(struct se_cmd *);
+sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
+	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
+
+bool target_sense_desc_format(struct se_device *dev);
+sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
+bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
+				       struct request_queue *q);
+
+static inline bool target_dev_configured(struct se_device *se_dev)
+{
+	return !!(se_dev->dev_flags & DF_CONFIGURED);
+}
+
+#endif /* TARGET_CORE_BACKEND_H */