android_kernel_motorola_sm6225/drivers/scsi/arm/scsi.h
Russell King 574dc0abab [ARM] Fix Acorn platform SCSI driver build failures
SCSI folk forgot to fix up all the uses of 'buffer' before deleting
this struct member.  Do it for them to rescue the resulting build
failures.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-08-06 20:55:33 +01:00

115 lines
2.9 KiB
C

/*
* linux/drivers/acorn/scsi/scsi.h
*
* Copyright (C) 2002 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Commonly used scsi driver functions.
*/
#include <linux/scatterlist.h>
#define BELT_AND_BRACES
/*
* The scatter-gather list handling. This contains all
* the yucky stuff that needs to be fixed properly.
*/
static inline int copy_SCp_to_sg(struct scatterlist *sg, struct scsi_pointer *SCp, int max)
{
int bufs = SCp->buffers_residual;
BUG_ON(bufs + 1 > max);
sg_set_buf(sg, SCp->ptr, SCp->this_residual);
if (bufs)
memcpy(sg + 1, SCp->buffer + 1,
sizeof(struct scatterlist) * bufs);
return bufs + 1;
}
static inline int next_SCp(struct scsi_pointer *SCp)
{
int ret = SCp->buffers_residual;
if (ret) {
SCp->buffer++;
SCp->buffers_residual--;
SCp->ptr = (char *)
(page_address(SCp->buffer->page) +
SCp->buffer->offset);
SCp->this_residual = SCp->buffer->length;
} else {
SCp->ptr = NULL;
SCp->this_residual = 0;
}
return ret;
}
static inline unsigned char get_next_SCp_byte(struct scsi_pointer *SCp)
{
char c = *SCp->ptr;
SCp->ptr += 1;
SCp->this_residual -= 1;
return c;
}
static inline void put_next_SCp_byte(struct scsi_pointer *SCp, unsigned char c)
{
*SCp->ptr = c;
SCp->ptr += 1;
SCp->this_residual -= 1;
}
static inline void init_SCp(Scsi_Cmnd *SCpnt)
{
memset(&SCpnt->SCp, 0, sizeof(struct scsi_pointer));
if (SCpnt->use_sg) {
unsigned long len = 0;
int buf;
SCpnt->SCp.buffer = (struct scatterlist *) SCpnt->request_buffer;
SCpnt->SCp.buffers_residual = SCpnt->use_sg - 1;
SCpnt->SCp.ptr = (char *)
(page_address(SCpnt->SCp.buffer->page) +
SCpnt->SCp.buffer->offset);
SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
#ifdef BELT_AND_BRACES
/*
* Calculate correct buffer length. Some commands
* come in with the wrong request_bufflen.
*/
for (buf = 0; buf <= SCpnt->SCp.buffers_residual; buf++)
len += SCpnt->SCp.buffer[buf].length;
if (SCpnt->request_bufflen != len)
printk(KERN_WARNING "scsi%d.%c: bad request buffer "
"length %d, should be %ld\n", SCpnt->device->host->host_no,
'0' + SCpnt->device->id, SCpnt->request_bufflen, len);
SCpnt->request_bufflen = len;
#endif
} else {
SCpnt->SCp.ptr = (unsigned char *)SCpnt->request_buffer;
SCpnt->SCp.this_residual = SCpnt->request_bufflen;
}
/*
* If the upper SCSI layers pass a buffer, but zero length,
* we aren't interested in the buffer pointer.
*/
if (SCpnt->SCp.this_residual == 0 && SCpnt->SCp.ptr) {
#if 0 //def BELT_AND_BRACES
printk(KERN_WARNING "scsi%d.%c: zero length buffer passed for "
"command ", SCpnt->host->host_no, '0' + SCpnt->target);
__scsi_print_command(SCpnt->cmnd);
#endif
SCpnt->SCp.ptr = NULL;
}
}