diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-29 21:12:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-29 21:12:20 -0700 |
| commit | 1e6d5dea34325df8dc204575cd0726cd5f2b864f (patch) | |
| tree | 4151e0c13cdf600b6e733477aa1657a38403dd53 /kernel/dma | |
| parent | 7ede5f78a0d74b574791c7eb0e2ca6e54b80c93c (diff) | |
| parent | 0a2f6372a43ff5e948b8b10be34d4473f6c2ef6c (diff) | |
Merge tag 'dma-mapping-6.5-2023-06-28' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- swiotlb cleanups (Petr Tesarik)
- use kvmalloc_array (gaoxu)
- a small step towards removing is_swiotlb_active (Christoph Hellwig)
- fix a Kconfig typo Sui Jingfeng)
* tag 'dma-mapping-6.5-2023-06-28' of git://git.infradead.org/users/hch/dma-mapping:
drm/nouveau: stop using is_swiotlb_active
swiotlb: use the atomic counter of total used slabs if available
swiotlb: remove unused field "used" from struct io_tlb_mem
dma-remap: use kvmalloc_array/kvfree for larger dma memory remap
dma-mapping: fix a Kconfig typo
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/Kconfig | 2 | ||||
| -rw-r--r-- | kernel/dma/remap.c | 4 | ||||
| -rw-r--r-- | kernel/dma/swiotlb.c | 11 |
3 files changed, 14 insertions, 3 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index abea1823fe21..11d077003205 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -42,7 +42,7 @@ config ARCH_HAS_DMA_SET_MASK # # Select this option if the architecture needs special handling for # DMA_ATTR_WRITE_COMBINE. Normally the "uncached" mapping should be what -# people thing of when saying write combine, so very few platforms should +# people think of when saying write combine, so very few platforms should # need to enable this. # config ARCH_HAS_DMA_WRITE_COMBINE diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c index b4526668072e..27596f3b4aef 100644 --- a/kernel/dma/remap.c +++ b/kernel/dma/remap.c @@ -43,13 +43,13 @@ void *dma_common_contiguous_remap(struct page *page, size_t size, void *vaddr; int i; - pages = kmalloc_array(count, sizeof(struct page *), GFP_KERNEL); + pages = kvmalloc_array(count, sizeof(struct page *), GFP_KERNEL); if (!pages) return NULL; for (i = 0; i < count; i++) pages[i] = nth_page(page, i); vaddr = vmap(pages, count, VM_DMA_COHERENT, prot); - kfree(pages); + kvfree(pages); return vaddr; } diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index af2e304c672c..775f7bb10ab1 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -717,6 +717,15 @@ static int swiotlb_find_slots(struct device *dev, phys_addr_t orig_addr, return -1; } +#ifdef CONFIG_DEBUG_FS + +static unsigned long mem_used(struct io_tlb_mem *mem) +{ + return atomic_long_read(&mem->total_used); +} + +#else /* !CONFIG_DEBUG_FS */ + static unsigned long mem_used(struct io_tlb_mem *mem) { int i; @@ -727,6 +736,8 @@ static unsigned long mem_used(struct io_tlb_mem *mem) return used; } +#endif /* CONFIG_DEBUG_FS */ + phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, size_t mapping_size, size_t alloc_size, unsigned int alloc_align_mask, enum dma_data_direction dir, |