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authorIngo Molnar <mingo@elte.hu>2008-07-18 22:00:54 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-18 22:00:54 +0200
commitbb2c018b09b681d43f5e08124b83e362647ea82b (patch)
treed794902c78f9fdd04ed88a4b8d451ed6f9292ec0 /drivers/scsi/sd.h
parent82638844d9a8581bbf33201cc209a14876eca167 (diff)
parent5b664cb235e97afbf34db9c4d77f08ebd725335e (diff)
Merge branch 'linus' into cpus4096
Conflicts: drivers/acpi/processor_throttling.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/scsi/sd.h')
-rw-r--r--drivers/scsi/sd.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
new file mode 100644
index 00000000000..03a3d45cfa4
--- /dev/null
+++ b/drivers/scsi/sd.h
@@ -0,0 +1,62 @@
+#ifndef _SCSI_DISK_H
+#define _SCSI_DISK_H
+
+/*
+ * More than enough for everybody ;) The huge number of majors
+ * is a leftover from 16bit dev_t days, we don't really need that
+ * much numberspace.
+ */
+#define SD_MAJORS 16
+
+/*
+ * This is limited by the naming scheme enforced in sd_probe,
+ * add another character to it if you really need more disks.
+ */
+#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
+
+/*
+ * Time out in seconds for disks and Magneto-opticals (which are slower).
+ */
+#define SD_TIMEOUT (30 * HZ)
+#define SD_MOD_TIMEOUT (75 * HZ)
+
+/*
+ * Number of allowed retries
+ */
+#define SD_MAX_RETRIES 5
+#define SD_PASSTHROUGH_RETRIES 1
+
+/*
+ * Size of the initial data buffer for mode and read capacity data
+ */
+#define SD_BUF_SIZE 512
+
+struct scsi_disk {
+ struct scsi_driver *driver; /* always &sd_template */
+ struct scsi_device *device;
+ struct device dev;
+ struct gendisk *disk;
+ unsigned int openers; /* protected by BKL for now, yuck */
+ sector_t capacity; /* size in 512-byte sectors */
+ u32 index;
+ u8 media_present;
+ u8 write_prot;
+ unsigned previous_state : 1;
+ unsigned WCE : 1; /* state of disk WCE bit */
+ unsigned RCD : 1; /* state of disk RCD bit, unused */
+ unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
+};
+#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
+
+static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
+{
+ return container_of(disk->private_data, struct scsi_disk, driver);
+}
+
+#define sd_printk(prefix, sdsk, fmt, a...) \
+ (sdsk)->disk ? \
+ sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
+ (sdsk)->disk->disk_name, ##a) : \
+ sdev_printk(prefix, (sdsk)->device, fmt, ##a)
+
+#endif /* _SCSI_DISK_H */