Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 282 insertions, 0 deletions

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
new file mode 100644
index 00000000000..07d974051b0
--- /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 */