openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

dma/swiotlb: Remove swiotlb_{alloc,free}_coherent() 

Unused now that everyone uses swiotlb_{alloc,free}().

Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20180319103826.12853-15-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Christoph Hellwig 2018-03-19 11:38:26 +01:00 committed by Ingo Molnar
parent c10f07aa27
commit 16e73adbca
2 changed files with 0 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/swiotlb.h
View File

@ -72,14 +72,6 @@ void *swiotlb_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle,
void swiotlb_free(struct device *dev, size_t size, void *vaddr, void swiotlb_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_addr, unsigned long attrs); dma_addr_t dma_addr, unsigned long attrs);
extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags);
extern void
swiotlb_free_coherent(struct device *hwdev, size_t size,
void *vaddr, dma_addr_t dma_handle);
extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, unsigned long offset, size_t size,
enum dma_data_direction dir, enum dma_data_direction dir,

38
lib/swiotlb.c
View File

@ -157,13 +157,6 @@ unsigned long swiotlb_size_or_default(void)
return size ? size : (IO_TLB_DEFAULT_SIZE); return size ? size : (IO_TLB_DEFAULT_SIZE);
} }
/* Note that this doesn't work with highmem page */
static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
volatile void *address)
{
return phys_to_dma(hwdev, virt_to_phys(address));
}
static bool no_iotlb_memory; static bool no_iotlb_memory;
void swiotlb_print_info(void) void swiotlb_print_info(void)
@ -752,28 +745,6 @@ swiotlb_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle,
return NULL; return NULL;
} }
void *
swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
{
int order = get_order(size);
unsigned long attrs = (flags & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0;
void *ret;
ret = (void *)__get_free_pages(flags, order);
if (ret) {
*dma_handle = swiotlb_virt_to_bus(hwdev, ret);
if (dma_coherent_ok(hwdev, *dma_handle, size)) {
memset(ret, 0, size);
return ret;
}
free_pages((unsigned long)ret, order);
}
return swiotlb_alloc_buffer(hwdev, size, dma_handle, attrs);
}
EXPORT_SYMBOL(swiotlb_alloc_coherent);
static bool swiotlb_free_buffer(struct device *dev, size_t size, static bool swiotlb_free_buffer(struct device *dev, size_t size,
dma_addr_t dma_addr) dma_addr_t dma_addr)
{ {
@ -793,15 +764,6 @@ static bool swiotlb_free_buffer(struct device *dev, size_t size,
return true; return true;
} }
void
swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dev_addr)
{
if (!swiotlb_free_buffer(hwdev, size, dev_addr))
free_pages((unsigned long)vaddr, get_order(size));
}
EXPORT_SYMBOL(swiotlb_free_coherent);
static void static void
swiotlb_full(struct device *dev, size_t size, enum dma_data_direction dir, swiotlb_full(struct device *dev, size_t size, enum dma_data_direction dir,
int do_panic) int do_panic)