Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
new file mode 100644
index 0000000..07d97405
--- /dev/null
+++ b/include/scsi/scsi_device.h
@@ -0,0 +1,282 @@
+#ifndef _SCSI_SCSI_DEVICE_H
+#define _SCSI_SCSI_DEVICE_H
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <asm/atomic.h>
+
+struct request_queue;
+struct scsi_cmnd;
+struct scsi_mode_data;
+
+
+/*
+ * sdev state: If you alter this, you also need to alter scsi_sysfs.c
+ * (for the ascii descriptions) and the state model enforcer:
+ * scsi_lib:scsi_device_set_state().
+ */
+enum scsi_device_state {
+ SDEV_CREATED = 1, /* device created but not added to sysfs
+ * Only internal commands allowed (for inq) */
+ SDEV_RUNNING, /* device properly configured
+ * All commands allowed */
+ SDEV_CANCEL, /* beginning to delete device
+ * Only error handler commands allowed */
+ SDEV_DEL, /* device deleted
+ * no commands allowed */
+ SDEV_QUIESCE, /* Device quiescent. No block commands
+ * will be accepted, only specials (which
+ * 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. */
+};
+
+struct scsi_device {
+ struct Scsi_Host *host;
+ struct request_queue *request_queue;
+
+ /* the next two are protected by the host->host_lock */
+ struct list_head siblings; /* list of all devices on this host */
+ struct list_head same_target_siblings; /* just the devices sharing same target id */
+
+ volatile unsigned short device_busy; /* commands actually active on low-level */
+ spinlock_t sdev_lock; /* also the request queue_lock */
+ spinlock_t list_lock;
+ struct list_head cmd_list; /* queue of in use SCSI Command structures */
+ struct list_head starved_entry;
+ struct scsi_cmnd *current_cmnd; /* currently active command */
+ unsigned short queue_depth; /* How deep of a queue we want */
+ unsigned short last_queue_full_depth; /* These two are used by */
+ unsigned short last_queue_full_count; /* scsi_track_queue_full() */
+ unsigned long last_queue_full_time;/* don't let QUEUE_FULLs on the same
+ jiffie count on our counter, they
+ could all be from the same event. */
+
+ unsigned int id, lun, channel;
+
+ unsigned int manufacturer; /* Manufacturer of device, for using
+ * vendor-specific cmd's */
+ unsigned sector_size; /* size in bytes */
+
+ void *hostdata; /* available to low-level driver */
+ char devfs_name[256]; /* devfs junk */
+ char type;
+ char scsi_level;
+ char inq_periph_qual; /* PQ from INQUIRY data */
+ unsigned char inquiry_len; /* valid bytes in 'inquiry' */
+ unsigned char * inquiry; /* INQUIRY response data */
+ char * vendor; /* [back_compat] point into 'inquiry' ... */
+ char * model; /* ... after scan; point to static string */
+ char * rev; /* ... "nullnullnullnull" before scan */
+ unsigned char current_tag; /* current tag */
+ struct scsi_target *sdev_target; /* used only for single_lun */
+
+ unsigned int sdev_bflags; /* black/white flags as also found in
+ * scsi_devinfo.[hc]. For now used only to
+ * pass settings from slave_alloc to scsi
+ * core. */
+ unsigned writeable:1;
+ unsigned removable:1;
+ unsigned changed:1; /* Data invalid due to media change */
+ unsigned busy:1; /* Used to prevent races */
+ unsigned lockable:1; /* Able to prevent media removal */
+ unsigned locked:1; /* Media removal disabled */
+ unsigned borken:1; /* Tell the Seagate driver to be
+ * painfully slow on this device */
+ unsigned disconnect:1; /* can disconnect */
+ unsigned soft_reset:1; /* Uses soft reset option */
+ unsigned sdtr:1; /* Device supports SDTR messages */
+ unsigned wdtr:1; /* Device supports WDTR messages */
+ unsigned ppr:1; /* Device supports PPR messages */
+ 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
+ * because we did a bus reset. */
+ unsigned use_10_for_rw:1; /* first try 10-byte read / write */
+ unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
+ unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */
+ unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */
+ unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
+ unsigned no_start_on_add:1; /* do not issue start on add */
+ unsigned allow_restart:1; /* issue START_UNIT in error handler */
+ 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 retry_hwerror:1; /* Retry HARDWARE_ERROR */
+
+ unsigned int device_blocked; /* Device returned QUEUE_FULL. */
+
+ unsigned int max_device_blocked; /* what device_blocked counts down from */
+#define SCSI_DEFAULT_DEVICE_BLOCKED 3
+
+ atomic_t iorequest_cnt;
+ atomic_t iodone_cnt;
+ atomic_t ioerr_cnt;
+
+ int timeout;
+
+ struct device sdev_gendev;
+ struct class_device sdev_classdev;
+
+ enum scsi_device_state sdev_state;
+ unsigned long sdev_data[0];
+} __attribute__((aligned(sizeof(unsigned long))));
+#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)
+#define transport_class_to_sdev(class_dev) \
+ to_scsi_device(class_dev->dev)
+
+/*
+ * scsi_target: representation of a scsi target, for now, this is only
+ * used for single_lun devices. If no one has active IO to the target,
+ * starget_sdev_user is NULL, else it points to the active sdev.
+ */
+struct scsi_target {
+ struct scsi_device *starget_sdev_user;
+ struct list_head siblings;
+ struct list_head devices;
+ struct device dev;
+ unsigned int reap_ref; /* protected by the host lock */
+ unsigned int channel;
+ unsigned int id; /* target id ... replace
+ * scsi_device.id eventually */
+ unsigned long create:1; /* signal that it needs to be added */
+ unsigned long starget_data[0];
+} __attribute__((aligned(sizeof(unsigned long))));
+
+#define to_scsi_target(d) container_of(d, struct scsi_target, dev)
+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)
+
+extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
+ uint, uint, uint, void *hostdata);
+#define scsi_add_device(host, channel, target, lun) \
+ __scsi_add_device(host, channel, target, lun, NULL)
+extern void scsi_remove_device(struct scsi_device *);
+extern int scsi_device_cancel(struct scsi_device *, int);
+
+extern int scsi_device_get(struct scsi_device *);
+extern void scsi_device_put(struct scsi_device *);
+extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
+ uint, uint, uint);
+extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
+ uint, uint, uint);
+extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
+ uint);
+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 *));
+
+/* only exposed to implement shost_for_each_device */
+extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
+ struct scsi_device *);
+
+/**
+ * shost_for_each_device - iterate over all devices of a host
+ * @sdev: iterator
+ * @host: host whiches devices we want to iterate over
+ *
+ * This traverses over each devices of @shost. The devices have
+ * a reference that must be released by scsi_host_put when breaking
+ * out of the loop.
+ */
+#define shost_for_each_device(sdev, shost) \
+ for ((sdev) = __scsi_iterate_devices((shost), NULL); \
+ (sdev); \
+ (sdev) = __scsi_iterate_devices((shost), (sdev)))
+
+/**
+ * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
+ * @sdev: iterator
+ * @host: host whiches devices we want to iterate over
+ *
+ * This traverses over each devices of @shost. It does _not_ take a
+ * reference on the scsi_device, thus it the whole loop must be protected
+ * by shost->host_lock.
+ *
+ * Note: The only reason why drivers would want to use this is because
+ * they're need to access the device list in irq context. Otherwise you
+ * really want to use shost_for_each_device instead.
+ */
+#define __shost_for_each_device(sdev, shost) \
+ list_for_each_entry((sdev), &((shost)->__devices), siblings)
+
+extern void scsi_adjust_queue_depth(struct scsi_device *, int, int);
+extern int scsi_track_queue_full(struct scsi_device *, int);
+
+extern int scsi_set_medium_removal(struct scsi_device *, char);
+
+extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
+ unsigned char *buffer, int len, int timeout,
+ int retries, struct scsi_mode_data *data);
+extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
+ int retries);
+extern int scsi_device_set_state(struct scsi_device *sdev,
+ enum scsi_device_state state);
+extern int scsi_device_quiesce(struct scsi_device *sdev);
+extern void scsi_device_resume(struct scsi_device *sdev);
+extern void scsi_target_quiesce(struct scsi_target *);
+extern void scsi_target_resume(struct scsi_target *);
+extern void scsi_scan_target(struct device *parent, unsigned int channel,
+ unsigned int id, unsigned int lun, int rescan);
+extern void scsi_target_reap(struct scsi_target *);
+extern void scsi_target_block(struct device *);
+extern void scsi_target_unblock(struct device *);
+extern void scsi_remove_target(struct device *);
+extern const char *scsi_device_state_name(enum scsi_device_state);
+extern int scsi_is_sdev_device(const struct device *);
+extern int scsi_is_target_device(const struct device *);
+static inline int scsi_device_online(struct scsi_device *sdev)
+{
+ return sdev->sdev_state != SDEV_OFFLINE;
+}
+
+/* accessor functions for the SCSI parameters */
+static inline int scsi_device_sync(struct scsi_device *sdev)
+{
+ return sdev->sdtr;
+}
+static inline int scsi_device_wide(struct scsi_device *sdev)
+{
+ return sdev->wdtr;
+}
+static inline int scsi_device_dt(struct scsi_device *sdev)
+{
+ return sdev->ppr;
+}
+static inline int scsi_device_dt_only(struct scsi_device *sdev)
+{
+ if (sdev->inquiry_len < 57)
+ return 0;
+ return (sdev->inquiry[56] & 0x0c) == 0x04;
+}
+static inline int scsi_device_ius(struct scsi_device *sdev)
+{
+ if (sdev->inquiry_len < 57)
+ return 0;
+ return sdev->inquiry[56] & 0x01;
+}
+static inline int scsi_device_qas(struct scsi_device *sdev)
+{
+ if (sdev->inquiry_len < 57)
+ return 0;
+ return sdev->inquiry[56] & 0x02;
+}
+#endif /* _SCSI_SCSI_DEVICE_H */