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4949314c72
We need to handle >1 page control cdbs, so extend the code to do a vmap if bigger than 1 page. It seems like kmap() is still preferable if just a page, fewer TLB shootdowns(?), so keep using that when possible. Rename function pair for their new scope. Signed-off-by: Andy Grover <agrover@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
#ifndef TARGET_CORE_BACKEND_H
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#define TARGET_CORE_BACKEND_H
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#define TRANSPORT_PLUGIN_PHBA_PDEV 1
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#define TRANSPORT_PLUGIN_VHBA_PDEV 2
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#define TRANSPORT_PLUGIN_VHBA_VDEV 3
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struct se_subsystem_api {
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struct list_head sub_api_list;
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char name[16];
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struct module *owner;
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u8 transport_type;
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unsigned int fua_write_emulated : 1;
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unsigned int write_cache_emulated : 1;
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int (*attach_hba)(struct se_hba *, u32);
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void (*detach_hba)(struct se_hba *);
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int (*pmode_enable_hba)(struct se_hba *, unsigned long);
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void *(*allocate_virtdevice)(struct se_hba *, const char *);
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struct se_device *(*create_virtdevice)(struct se_hba *,
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struct se_subsystem_dev *, void *);
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void (*free_device)(void *);
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int (*transport_complete)(struct se_task *task);
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struct se_task *(*alloc_task)(unsigned char *cdb);
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int (*do_task)(struct se_task *);
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int (*do_discard)(struct se_device *, sector_t, u32);
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void (*do_sync_cache)(struct se_task *);
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void (*free_task)(struct se_task *);
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ssize_t (*check_configfs_dev_params)(struct se_hba *,
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struct se_subsystem_dev *);
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ssize_t (*set_configfs_dev_params)(struct se_hba *,
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struct se_subsystem_dev *, const char *, ssize_t);
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ssize_t (*show_configfs_dev_params)(struct se_hba *,
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struct se_subsystem_dev *, char *);
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u32 (*get_device_rev)(struct se_device *);
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u32 (*get_device_type)(struct se_device *);
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sector_t (*get_blocks)(struct se_device *);
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unsigned char *(*get_sense_buffer)(struct se_task *);
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};
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int transport_subsystem_register(struct se_subsystem_api *);
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void transport_subsystem_release(struct se_subsystem_api *);
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struct se_device *transport_add_device_to_core_hba(struct se_hba *,
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struct se_subsystem_api *, struct se_subsystem_dev *, u32,
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void *, struct se_dev_limits *, const char *, const char *);
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void transport_complete_sync_cache(struct se_cmd *, int);
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void transport_complete_task(struct se_task *, int);
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void target_get_task_cdb(struct se_task *, unsigned char *);
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void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
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int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
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int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
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int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
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/* core helpers also used by command snooping in pscsi */
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void *transport_kmap_data_sg(struct se_cmd *);
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void transport_kunmap_data_sg(struct se_cmd *);
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#endif /* TARGET_CORE_BACKEND_H */
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