mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 15:35:06 +07:00
6c9c6d6301
Add dma-debug interface debug_dma_mapping_error() to debug
drivers that fail to check dma mapping errors on addresses
returned by dma_map_single() and dma_map_page() interfaces.
This interface clears a flag set by debug_dma_map_page() to
indicate that dma_mapping_error() has been called by the
driver. When driver does unmap, debug_dma_unmap() checks the
flag and if this flag is still set, prints warning message
that includes call trace that leads up to the unmap. This
interface can be called from dma_mapping_error() routines to
enable dma mapping error check debugging.
Tested: Intel iommu and swiotlb (iommu=soft) on x86-64 with
CONFIG_DMA_API_DEBUG enabled and disabled.
Signed-off-by: Shuah Khan <shuah.khan@hp.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
189 lines
5.0 KiB
C
189 lines
5.0 KiB
C
/*
|
|
* Copyright (C) 2008 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Joerg Roedel <joerg.roedel@amd.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __DMA_DEBUG_H
|
|
#define __DMA_DEBUG_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct device;
|
|
struct scatterlist;
|
|
struct bus_type;
|
|
|
|
#ifdef CONFIG_DMA_API_DEBUG
|
|
|
|
extern void dma_debug_add_bus(struct bus_type *bus);
|
|
|
|
extern void dma_debug_init(u32 num_entries);
|
|
|
|
extern int dma_debug_resize_entries(u32 num_entries);
|
|
|
|
extern void debug_dma_map_page(struct device *dev, struct page *page,
|
|
size_t offset, size_t size,
|
|
int direction, dma_addr_t dma_addr,
|
|
bool map_single);
|
|
|
|
extern void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
|
|
|
|
extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
|
|
size_t size, int direction, bool map_single);
|
|
|
|
extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
|
|
int nents, int mapped_ents, int direction);
|
|
|
|
extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
|
|
int nelems, int dir);
|
|
|
|
extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t dma_addr, void *virt);
|
|
|
|
extern void debug_dma_free_coherent(struct device *dev, size_t size,
|
|
void *virt, dma_addr_t addr);
|
|
|
|
extern void debug_dma_sync_single_for_cpu(struct device *dev,
|
|
dma_addr_t dma_handle, size_t size,
|
|
int direction);
|
|
|
|
extern void debug_dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
size_t size, int direction);
|
|
|
|
extern void debug_dma_sync_single_range_for_cpu(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
unsigned long offset,
|
|
size_t size,
|
|
int direction);
|
|
|
|
extern void debug_dma_sync_single_range_for_device(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
unsigned long offset,
|
|
size_t size, int direction);
|
|
|
|
extern void debug_dma_sync_sg_for_cpu(struct device *dev,
|
|
struct scatterlist *sg,
|
|
int nelems, int direction);
|
|
|
|
extern void debug_dma_sync_sg_for_device(struct device *dev,
|
|
struct scatterlist *sg,
|
|
int nelems, int direction);
|
|
|
|
extern void debug_dma_dump_mappings(struct device *dev);
|
|
|
|
#else /* CONFIG_DMA_API_DEBUG */
|
|
|
|
static inline void dma_debug_add_bus(struct bus_type *bus)
|
|
{
|
|
}
|
|
|
|
static inline void dma_debug_init(u32 num_entries)
|
|
{
|
|
}
|
|
|
|
static inline int dma_debug_resize_entries(u32 num_entries)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void debug_dma_map_page(struct device *dev, struct page *page,
|
|
size_t offset, size_t size,
|
|
int direction, dma_addr_t dma_addr,
|
|
bool map_single)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_mapping_error(struct device *dev,
|
|
dma_addr_t dma_addr)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
|
|
size_t size, int direction,
|
|
bool map_single)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
|
|
int nents, int mapped_ents, int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_unmap_sg(struct device *dev,
|
|
struct scatterlist *sglist,
|
|
int nelems, int dir)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t dma_addr, void *virt)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_free_coherent(struct device *dev, size_t size,
|
|
void *virt, dma_addr_t addr)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_sync_single_for_cpu(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
size_t size, int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
size_t size, int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_sync_single_range_for_cpu(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
unsigned long offset,
|
|
size_t size,
|
|
int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_sync_single_range_for_device(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
unsigned long offset,
|
|
size_t size,
|
|
int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
|
|
struct scatterlist *sg,
|
|
int nelems, int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_sync_sg_for_device(struct device *dev,
|
|
struct scatterlist *sg,
|
|
int nelems, int direction)
|
|
{
|
|
}
|
|
|
|
static inline void debug_dma_dump_mappings(struct device *dev)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_DMA_API_DEBUG */
|
|
|
|
#endif /* __DMA_DEBUG_H */
|