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swiotlb: remove swiotlb_init_with_tbl and swiotlb_init_late_with_tbl 

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
This commit is contained in:
Christoph Hellwig 2022-03-15 07:41:04 +01:00
parent 3f70356edf
commit 6424e31b1c
2 changed files with 20 additions and 59 deletions
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2
include/linux/swiotlb.h
View File

@ -34,13 +34,11 @@ struct scatterlist;
/* default to 64MB */
#define IO_TLB_DEFAULT_SIZE (64UL<<20)
int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, unsigned int flags);
unsigned long swiotlb_size_or_default(void);
void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
int (*remap)(void *tlb, unsigned long nslabs));
int swiotlb_init_late(size_t size, gfp_t gfp_mask,
int (*remap)(void *tlb, unsigned long nslabs));
extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
extern void __init swiotlb_update_mem_attributes(void);
phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys,

77
kernel/dma/swiotlb.c
View File

@ -225,33 +225,6 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
return;
}
int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs,
unsigned int flags)
{
struct io_tlb_mem *mem = &io_tlb_default_mem;
size_t alloc_size;
if (swiotlb_force_disable)
return 0;
/* protect against double initialization */
if (WARN_ON_ONCE(mem->nslabs))
return -ENOMEM;
alloc_size = PAGE_ALIGN(array_size(sizeof(*mem->slots), nslabs));
mem->slots = memblock_alloc(alloc_size, PAGE_SIZE);
if (!mem->slots)
panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
__func__, alloc_size, PAGE_SIZE);
swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false);
mem->force_bounce = flags & SWIOTLB_FORCE;
if (flags & SWIOTLB_VERBOSE)
swiotlb_print_info();
return 0;
}
/*
* Statically reserve bounce buffer space and initialize bounce buffer data
* structures for the software IO TLB used to implement the DMA API.
@ -259,7 +232,9 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs,
void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
int (*remap)(void *tlb, unsigned long nslabs))
{
struct io_tlb_mem *mem = &io_tlb_default_mem;
unsigned long nslabs = default_nslabs;
size_t alloc_size = PAGE_ALIGN(array_size(sizeof(*mem->slots), nslabs));
size_t bytes;
void *tlb;
@ -280,7 +255,8 @@ retry:
else
tlb = memblock_alloc_low(bytes, PAGE_SIZE);
if (!tlb)
goto fail;
panic("%s: failed to allocate tlb structure\n", __func__);
if (remap && remap(tlb, nslabs) < 0) {
memblock_free(tlb, PAGE_ALIGN(bytes));
@ -290,14 +266,17 @@ retry:
__func__, bytes);
goto retry;
}
if (swiotlb_init_with_tbl(tlb, default_nslabs, flags))
goto fail_free_mem;
return;
fail_free_mem:
memblock_free(tlb, bytes);
fail:
pr_warn("Cannot allocate buffer");
mem->slots = memblock_alloc(alloc_size, PAGE_SIZE);
if (!mem->slots)
panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
__func__, alloc_size, PAGE_SIZE);
swiotlb_init_io_tlb_mem(mem, __pa(tlb), default_nslabs, false);
mem->force_bounce = flags & SWIOTLB_FORCE;
if (flags & SWIOTLB_VERBOSE)
swiotlb_print_info();
}
void __init swiotlb_init(bool addressing_limit, unsigned int flags)
@ -313,6 +292,7 @@ void __init swiotlb_init(bool addressing_limit, unsigned int flags)
int swiotlb_init_late(size_t size, gfp_t gfp_mask,
int (*remap)(void *tlb, unsigned long nslabs))
{
struct io_tlb_mem *mem = &io_tlb_default_mem;
unsigned long nslabs = ALIGN(size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE);
unsigned long bytes;
unsigned char *vstart = NULL;
@ -353,33 +333,16 @@ retry:
return rc;
goto retry;
}
rc = swiotlb_late_init_with_tbl(vstart, nslabs);
if (rc)
free_pages((unsigned long)vstart, order);
return rc;
}
int
swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
{
struct io_tlb_mem *mem = &io_tlb_default_mem;
unsigned long bytes = nslabs << IO_TLB_SHIFT;
if (swiotlb_force_disable)
return 0;
/* protect against double initialization */
if (WARN_ON_ONCE(mem->nslabs))
return -ENOMEM;
mem->slots = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(array_size(sizeof(*mem->slots), nslabs)));
if (!mem->slots)
if (!mem->slots) {
free_pages((unsigned long)vstart, order);
return -ENOMEM;
}
set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true);
set_memory_decrypted((unsigned long)vstart, bytes >> PAGE_SHIFT);
swiotlb_init_io_tlb_mem(mem, virt_to_phys(vstart), nslabs, true);
swiotlb_print_info();
return 0;