1 #ifndef _SCSI_DISK_H 2 #define _SCSI_DISK_H 3 4 /* 5 * More than enough for everybody ;) The huge number of majors 6 * is a leftover from 16bit dev_t days, we don't really need that 7 * much numberspace. 8 */ 9 #define SD_MAJORS 16 10 11 /* 12 * This is limited by the naming scheme enforced in sd_probe, 13 * add another character to it if you really need more disks. 14 */ 15 #define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26) 16 17 /* 18 * Time out in seconds for disks and Magneto-opticals (which are slower). 19 */ 20 #define SD_TIMEOUT (30 * HZ) 21 #define SD_MOD_TIMEOUT (75 * HZ) 22 23 /* 24 * Number of allowed retries 25 */ 26 #define SD_MAX_RETRIES 5 27 #define SD_PASSTHROUGH_RETRIES 1 28 29 /* 30 * Size of the initial data buffer for mode and read capacity data 31 */ 32 #define SD_BUF_SIZE 512 33 34 struct scsi_disk { 35 struct scsi_driver *driver; /* always &sd_template */ 36 struct scsi_device *device; 37 struct device dev; 38 struct gendisk *disk; 39 unsigned int openers; /* protected by BKL for now, yuck */ 40 sector_t capacity; /* size in 512-byte sectors */ 41 u32 index; 42 u8 media_present; 43 u8 write_prot; 44 unsigned previous_state : 1; 45 unsigned WCE : 1; /* state of disk WCE bit */ 46 unsigned RCD : 1; /* state of disk RCD bit, unused */ 47 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 48 }; 49 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 50 51 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 52 { 53 return container_of(disk->private_data, struct scsi_disk, driver); 54 } 55 56 #define sd_printk(prefix, sdsk, fmt, a...) \ 57 (sdsk)->disk ? \ 58 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 59 (sdsk)->disk->disk_name, ##a) : \ 60 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 61 62 #endif /* _SCSI_DISK_H */ 63