X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Fscsi%2Fscsi_device.h;h=a37a8148a31033970c3d5cd52905f324a140c41a;hb=83ff6fe8580a7c834dba4389d742332fff9b9929;hp=66e9058357e02d85d8617b9cd58edf893fff0b30;hpb=a341cd0f6a0fde1f85fec9aa8f81f824ea4a3f92;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 66e9058..a37a814 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -6,6 +6,7 @@ #include #include #include +#include #include struct request_queue; @@ -41,9 +42,11 @@ enum scsi_device_state { * originate in the mid-layer) */ SDEV_OFFLINE, /* Device offlined (by error handling or * user request */ - SDEV_BLOCK, /* Device blocked by scsi lld. No scsi - * commands from user or midlayer should be issued - * to the scsi lld. */ + SDEV_BLOCK, /* Device blocked by scsi lld. No + * scsi commands from user or midlayer + * should be issued to the scsi + * lld. */ + SDEV_CREATED_BLOCK, /* same as above but for created devices */ }; enum scsi_device_event { @@ -122,9 +125,6 @@ struct scsi_device { unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ unsigned simple_tags:1; /* simple queue tag messages are enabled */ unsigned ordered_tags:1;/* ordered queue tag messages are enabled */ - unsigned single_lun:1; /* Indicates we should only allow I/O to - * one of the luns for the device at a - * time. */ unsigned was_reset:1; /* There was a bus reset on the bus for * this device */ unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN @@ -137,11 +137,14 @@ struct scsi_device { unsigned no_start_on_add:1; /* do not issue start on add */ unsigned allow_restart:1; /* issue START_UNIT in error handler */ unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ + unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ unsigned select_no_atn:1; unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ + unsigned last_sector_bug:1; /* do not use multisector accesses on + SD_LAST_BUGGY_SECTORS */ DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ struct list_head event_list; /* asserted events */ @@ -158,20 +161,47 @@ struct scsi_device { int timeout; - struct device sdev_gendev; - struct class_device sdev_classdev; + struct device sdev_gendev, + sdev_dev; struct execute_work ew; /* used to get process context on put */ + struct scsi_dh_data *scsi_dh_data; enum scsi_device_state sdev_state; unsigned long sdev_data[0]; } __attribute__((aligned(sizeof(unsigned long)))); + +struct scsi_dh_devlist { + char *vendor; + char *model; +}; + +struct scsi_device_handler { + /* Used by the infrastructure */ + struct list_head list; /* list of scsi_device_handlers */ + + /* Filled by the hardware handler */ + struct module *module; + const char *name; + const struct scsi_dh_devlist *devlist; + int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *); + int (*attach)(struct scsi_device *); + void (*detach)(struct scsi_device *); + int (*activate)(struct scsi_device *); + int (*prep_fn)(struct scsi_device *, struct request *); +}; + +struct scsi_dh_data { + struct scsi_device_handler *scsi_dh; + char buf[0]; +}; + #define to_scsi_device(d) \ container_of(d, struct scsi_device, sdev_gendev) #define class_to_sdev(d) \ - container_of(d, struct scsi_device, sdev_classdev) + container_of(d, struct scsi_device, sdev_dev) #define transport_class_to_sdev(class_dev) \ - to_scsi_device(class_dev->dev) + to_scsi_device(class_dev->parent) #define sdev_printk(prefix, sdev, fmt, a...) \ dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a) @@ -183,7 +213,8 @@ struct scsi_device { sdev_printk(prefix, (scmd)->device, fmt, ##a) enum scsi_target_state { - STARGET_RUNNING = 1, + STARGET_CREATED = 1, + STARGET_RUNNING, STARGET_DEL, }; @@ -202,8 +233,21 @@ struct scsi_target { unsigned int id; /* target id ... replace * scsi_device.id eventually */ unsigned int create:1; /* signal that it needs to be added */ + unsigned int single_lun:1; /* Indicates we should only + * allow I/O to one of the luns + * for the device at a time. */ unsigned int pdt_1f_for_no_lun; /* PDT = 0x1f */ /* means no lun present */ + /* commands actually active on LLD. protected by host lock. */ + unsigned int target_busy; + /* + * LLDs should set this in the slave_alloc host template callout. + * If set to zero then there is not limit. + */ + unsigned int can_queue; + unsigned int target_blocked; + unsigned int max_target_blocked; +#define SCSI_DEFAULT_TARGET_BLOCKED 3 char scsi_level; struct execute_work ew; @@ -219,7 +263,7 @@ static inline struct scsi_target *scsi_target(struct scsi_device *sdev) return to_scsi_target(sdev->sdev_gendev.parent); } #define transport_class_to_starget(class_dev) \ - to_scsi_target(class_dev->dev) + to_scsi_target(class_dev->parent) #define starget_printk(prefix, starget, fmt, a...) \ dev_printk(prefix, &(starget)->dev, fmt, ##a) @@ -228,7 +272,9 @@ extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, uint, uint, uint, void *hostdata); extern int scsi_add_device(struct Scsi_Host *host, uint channel, uint target, uint lun); +extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); extern void scsi_remove_device(struct scsi_device *); +extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); extern int scsi_device_get(struct scsi_device *); extern void scsi_device_put(struct scsi_device *); @@ -242,6 +288,9 @@ extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, uint); extern void starget_for_each_device(struct scsi_target *, void *, void (*fn)(struct scsi_device *, void *)); +extern void __starget_for_each_device(struct scsi_target *, void *, + void (*fn)(struct scsi_device *, + void *)); /* only exposed to implement shost_for_each_device */ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, @@ -292,7 +341,7 @@ extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, struct scsi_mode_data *data, struct scsi_sense_hdr *); extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, - int retries); + int retries, struct scsi_sense_hdr *sshdr); extern int scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state); extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, @@ -347,10 +396,23 @@ static inline unsigned int sdev_id(struct scsi_device *sdev) #define scmd_id(scmd) sdev_id((scmd)->device) #define scmd_channel(scmd) sdev_channel((scmd)->device) +/* + * checks for positions of the SCSI state machine + */ static inline int scsi_device_online(struct scsi_device *sdev) { return sdev->sdev_state != SDEV_OFFLINE; } +static inline int scsi_device_blocked(struct scsi_device *sdev) +{ + return sdev->sdev_state == SDEV_BLOCK || + sdev->sdev_state == SDEV_CREATED_BLOCK; +} +static inline int scsi_device_created(struct scsi_device *sdev) +{ + return sdev->sdev_state == SDEV_CREATED || + sdev->sdev_state == SDEV_CREATED_BLOCK; +} /* accessor functions for the SCSI parameters */ static inline int scsi_device_sync(struct scsi_device *sdev) @@ -383,6 +445,15 @@ static inline int scsi_device_qas(struct scsi_device *sdev) return 0; return sdev->inquiry[56] & 0x02; } +static inline int scsi_device_enclosure(struct scsi_device *sdev) +{ + return sdev->inquiry[6] & (1<<6); +} + +static inline int scsi_device_protection(struct scsi_device *sdev) +{ + return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); +} #define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*")