aleph/lkl_linux
1
0
Fork 0
mirror of https://github.com/lkl/linux.git synced 2025-12-19 16:13:19 +09:00
Code Issues Packages Projects Releases Wiki Activity

swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing

Browse Source 
Propagate the swiotlb_force into io_tlb_default_mem->force_bounce and
use it to determine whether to bounce the data or not. This will be
useful later to allow for different pools.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Stefano Stabellini <sstabellini@kernel.org>
Tested-by: Will Deacon <will@kernel.org>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

[v2: Includes Will's fix]
This commit is contained in:
Claire Chang
2021-06-24 23:55:20 +08:00
committed by Konrad Rzeszutek Wilk
parent 6f2beb268a
commit 903cd0f315
5 changed files with 20 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/linux/swiotlb.h
View File

@@ -84,6 +84,7 @@ extern enum swiotlb_force swiotlb_force;
* unmap calls.
* @debugfs: The dentry to debugfs.
* @late_alloc: %true if allocated using the page allocator
* @force_bounce: %true if swiotlb bouncing is forced
*/
struct io_tlb_mem {
phys_addr_t start;
@@ -94,6 +95,7 @@ struct io_tlb_mem {
spinlock_t lock;
struct dentry *debugfs;
bool late_alloc;
bool force_bounce;
struct io_tlb_slot {
phys_addr_t orig_addr;
size_t alloc_size;
@@ -109,6 +111,13 @@ static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr)
return mem && paddr >= mem->start && paddr < mem->end;
}
static inline bool is_swiotlb_force_bounce(struct device *dev)
{
struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
return mem && mem->force_bounce;
}
void __init swiotlb_exit(void);
unsigned int swiotlb_max_segment(void);
size_t swiotlb_max_mapping_size(struct device *dev);
@@ -120,6 +129,10 @@ static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr)
{
return false;
}
static inline bool is_swiotlb_force_bounce(struct device *dev)
{
return false;
}
static inline void swiotlb_exit(void)
{
}