mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 23:56:45 +07:00
d6ec084200
Add a Kconfig entry which will toggle some sanity checks on the sg entry and tables. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
28 lines
767 B
C
28 lines
767 B
C
#ifndef _ASMARM_SCATTERLIST_H
|
|
#define _ASMARM_SCATTERLIST_H
|
|
|
|
#include <asm/memory.h>
|
|
#include <asm/types.h>
|
|
|
|
struct scatterlist {
|
|
#ifdef CONFIG_DEBUG_SG
|
|
unsigned long sg_magic;
|
|
#endif
|
|
unsigned long page_link;
|
|
unsigned int offset; /* buffer offset */
|
|
dma_addr_t dma_address; /* dma address */
|
|
unsigned int length; /* length */
|
|
};
|
|
|
|
/*
|
|
* 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 /* _ASMARM_SCATTERLIST_H */
|