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Merge tag 'm68k-for-v5.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

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Pull m68k updates from Geert Uytterhoeven:

  - switch to using the generic remapping DMA allocator

  - defconfig updates

* tag 'm68k-for-v5.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: Implement arch_dma_prep_coherent()
  m68k: Use the generic dma coherent remap allocator
  m68k: defconfig: Update defconfigs for v5.2-rc1
This commit is contained in:
Linus Torvalds
2019-07-08 10:00:58 -07:00
parent dfd437a257 69878ef475
commit 278ecbf027
14 changed files with 99 additions and 167 deletions
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59
arch/m68k/kernel/dma.c
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@@ -18,57 +18,22 @@
#include <asm/pgalloc.h>
#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
gfp_t flag, unsigned long attrs)
void arch_dma_prep_coherent(struct page *page, size_t size)
{
struct page *page, **map;
pgprot_t pgprot;
void *addr;
int i, order;
cache_push(page_to_phys(page), size);
}
pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
size = PAGE_ALIGN(size);
order = get_order(size);
page = alloc_pages(flag | __GFP_ZERO, order);
if (!page)
return NULL;
*handle = page_to_phys(page);
map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
if (!map) {
__free_pages(page, order);
return NULL;
pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
unsigned long attrs)
{
if (CPU_IS_040_OR_060) {
pgprot_val(prot) &= ~_PAGE_CACHE040;
pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
} else {
pgprot_val(prot) |= _PAGE_NOCACHE030;
}
split_page(page, order);
order = 1 << order;
size >>= PAGE_SHIFT;
map[0] = page;
for (i = 1; i < size; i++)
map[i] = page + i;
for (; i < order; i++)
__free_page(page + i);
pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
if (CPU_IS_040_OR_060)
pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
else
pgprot_val(pgprot) |= _PAGE_NOCACHE030;
addr = vmap(map, size, VM_MAP, pgprot);
kfree(map);
return addr;
return prot;
}
void arch_dma_free(struct device *dev, size_t size, void *addr,
dma_addr_t handle, unsigned long attrs)
{
pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
vfree(addr);
}
#else
#include <asm/cacheflush.h>