i'm about to go off and drink beer, but here's the most recent
(albeit minor) obstacle -- the asm/scatterlist.h file for NIOS2 needs
some updating. here's the current version (clearly stolen outright
from the SH version, so i'll fix that):
=================================
#ifndef __ASM_SH_SCATTERLIST_H
#define __ASM_SH_SCATTERLIST_H
struct scatterlist {
struct page * page; /* Location for highmem page, if any */
unsigned int offset;/* for highmem, page offset */
dma_addr_t dma_address;
unsigned int length;
};
#define ISA_DMA_THRESHOLD (0xffffffff)
#endif /* !(__ASM_SH_SCATTERLIST_H) */
=================================
in the meantime, all the other architectures look much more like
this:
=================================
#ifndef __ASM_SH_SCATTERLIST_H
#define __ASM_SH_SCATTERLIST_H
#include <asm/types.h>
struct scatterlist {
#ifdef CONFIG_DEBUG_SG
unsigned long sg_magic;
#endif
unsigned long page_link;
unsigned int offset;/* for highmem, page offset */
dma_addr_t dma_address;
unsigned int length;
};
#define ISA_DMA_THRESHOLD (0x1fffffff)
/* These macros should be used after a pci_map_sg call has been done
* to get bus addresses of each of the SG entries and their lengths.
* You should only work with the number of sg entries pci_map_sg
* returns, or alternatively stop on the first sg_dma_len(sg) which
* is 0.
*/
#define sg_dma_address(sg) ((sg)->dma_address)
#define sg_dma_len(sg) ((sg)->length)
#endif /* !(__ASM_SH_SCATTERLIST_H) */
==================================
note particularly the new "unsigned long page_link" member, which is
absolutely necessary. if anyone is feeling ambitious, feel free to
supply an appropriate nios2-specific scatterlist.h header file, or
i'll just fake it and make it look vaguely like the rest and take my
chances.
rday
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://crashcourse.ca
========================================================================
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