From eb44820c28bc9a042e1157b41c677018a8fdfc74 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sat, 3 Nov 2007 13:30:39 -0500 Subject: [SCSI] Add Documentation and integrate into docbook build Add Documentation/DocBook/scsi_midlayer.tmpl, add to Makefile, and update lots of kerneldoc comments in drivers/scsi/*. Updated with comments from Stefan Richter, Stephen M. Cameron, James Bottomley and Randy Dunlap. Signed-off-by: Rob Landley Signed-off-by: James Bottomley --- drivers/scsi/scsicam.c | 35 ++++++++++++++++++++++++----------- 1 file changed, 24 insertions(+), 11 deletions(-) (limited to 'drivers/scsi/scsicam.c') diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c index cd68a66c7bb..3f21bc65e8c 100644 --- a/drivers/scsi/scsicam.c +++ b/drivers/scsi/scsicam.c @@ -24,6 +24,14 @@ static int setsize(unsigned long capacity, unsigned int *cyls, unsigned int *hds, unsigned int *secs); +/** + * scsi_bios_ptable - Read PC partition table out of first sector of device. + * @dev: from this device + * + * Description: Reads the first sector from the device and returns %0x42 bytes + * starting at offset %0x1be. + * Returns: partition table in kmalloc(GFP_KERNEL) memory, or NULL on error. + */ unsigned char *scsi_bios_ptable(struct block_device *dev) { unsigned char *res = kmalloc(66, GFP_KERNEL); @@ -43,15 +51,17 @@ unsigned char *scsi_bios_ptable(struct block_device *dev) } EXPORT_SYMBOL(scsi_bios_ptable); -/* - * Function : int scsicam_bios_param (struct block_device *bdev, ector_t capacity, int *ip) +/** + * scsicam_bios_param - Determine geometry of a disk in cylinders/heads/sectors. + * @bdev: which device + * @capacity: size of the disk in sectors + * @ip: return value: ip[0]=heads, ip[1]=sectors, ip[2]=cylinders * - * Purpose : to determine the BIOS mapping used for a drive in a + * Description : determine the BIOS mapping/geometry used for a drive in a * SCSI-CAM system, storing the results in ip as required * by the HDIO_GETGEO ioctl(). * * Returns : -1 on failure, 0 on success. - * */ int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip) @@ -98,15 +108,18 @@ int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip) } EXPORT_SYMBOL(scsicam_bios_param); -/* - * Function : static int scsi_partsize(unsigned char *buf, unsigned long - * capacity,unsigned int *cyls, unsigned int *hds, unsigned int *secs); +/** + * scsi_partsize - Parse cylinders/heads/sectors from PC partition table + * @buf: partition table, see scsi_bios_ptable() + * @capacity: size of the disk in sectors + * @cyls: put cylinders here + * @hds: put heads here + * @secs: put sectors here * - * Purpose : to determine the BIOS mapping used to create the partition + * Description: determine the BIOS mapping/geometry used to create the partition * table, storing the results in *cyls, *hds, and *secs * - * Returns : -1 on failure, 0 on success. - * + * Returns: -1 on failure, 0 on success. */ int scsi_partsize(unsigned char *buf, unsigned long capacity, @@ -194,7 +207,7 @@ EXPORT_SYMBOL(scsi_partsize); * * WORKING X3T9.2 * DRAFT 792D - * + * see http://www.t10.org/ftp/t10/drafts/cam/cam-r12b.pdf * * Revision 6 * 10-MAR-94 -- cgit v1.2.3