c3c94c5a2f
Implement SBC START/STOP management. sdev->mange_start_stop is added. When it's set to one, sd STOPs the device on suspend and shutdown and STARTs it on resume. sdev->manage_start_stop defaults is in sdev instead of scsi_disk cdev to allow ->slave_config() override the default configuration but is exported under scsi_disk sysfs node as sdev->allow_restart is. When manage_start_stop is zero (the default value), this patch doesn't introduce any behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Rejections fixed and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
#ifndef _SCSI_DISK_H
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#define _SCSI_DISK_H
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/*
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* More than enough for everybody ;) The huge number of majors
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* is a leftover from 16bit dev_t days, we don't really need that
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* much numberspace.
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*/
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#define SD_MAJORS 16
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/*
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* This is limited by the naming scheme enforced in sd_probe,
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* add another character to it if you really need more disks.
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*/
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#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
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/*
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* Time out in seconds for disks and Magneto-opticals (which are slower).
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*/
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#define SD_TIMEOUT (30 * HZ)
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#define SD_MOD_TIMEOUT (75 * HZ)
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/*
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* Number of allowed retries
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*/
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#define SD_MAX_RETRIES 5
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#define SD_PASSTHROUGH_RETRIES 1
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/*
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* Size of the initial data buffer for mode and read capacity data
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*/
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#define SD_BUF_SIZE 512
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struct scsi_disk {
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struct scsi_driver *driver; /* always &sd_template */
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struct scsi_device *device;
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struct class_device cdev;
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struct gendisk *disk;
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unsigned int openers; /* protected by BKL for now, yuck */
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sector_t capacity; /* size in 512-byte sectors */
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u32 index;
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u8 media_present;
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u8 write_prot;
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unsigned WCE : 1; /* state of disk WCE bit */
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unsigned RCD : 1; /* state of disk RCD bit, unused */
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unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
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};
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#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev)
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static int sd_revalidate_disk(struct gendisk *disk);
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static void sd_rw_intr(struct scsi_cmnd * SCpnt);
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static int sd_probe(struct device *);
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static int sd_remove(struct device *);
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static void sd_shutdown(struct device *dev);
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static int sd_suspend(struct device *dev, pm_message_t state);
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static int sd_resume(struct device *dev);
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static void sd_rescan(struct device *);
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static int sd_init_command(struct scsi_cmnd *);
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static int sd_issue_flush(struct device *, sector_t *);
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static void sd_prepare_flush(request_queue_t *, struct request *);
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static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
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static void scsi_disk_release(struct class_device *cdev);
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static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
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static void sd_print_result(struct scsi_disk *, int);
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#define sd_printk(prefix, sdsk, fmt, a...) \
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(sdsk)->disk ? \
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sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
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(sdsk)->disk->disk_name, ##a) : \
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sdev_printk(prefix, (sdsk)->device, fmt, ##a)
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#endif /* _SCSI_DISK_H */
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