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nouveau: factor out device memory address calculation

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Factor out the repeated device memory address calculation into
a helper.

Link: https://lore.kernel.org/r/20190814075928.23766-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Christoph Hellwig 2019-08-14 09:59:21 +02:00 committed by Jason Gunthorpe
parent dea027f282
commit 64de8b8d65
1 changed files with 17 additions and 25 deletions
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42
drivers/gpu/drm/nouveau/nouveau_dmem.c
View File

@ -102,6 +102,14 @@ struct nouveau_migrate {
unsigned long dma_nr;
};
static unsigned long nouveau_dmem_page_addr(struct page *page)
{
struct nouveau_dmem_chunk *chunk = page->zone_device_data;
unsigned long idx = page_to_pfn(page) - chunk->pfn_first;
return (idx << PAGE_SHIFT) + chunk->bo->bo.offset;
}
static void nouveau_dmem_page_free(struct page *page)
{
struct nouveau_dmem_chunk *chunk = page->zone_device_data;
@ -169,9 +177,7 @@ nouveau_dmem_fault_alloc_and_copy(struct vm_area_struct *vma,
/* Copy things over */
copy = drm->dmem->migrate.copy_func;
for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) {
struct nouveau_dmem_chunk *chunk;
struct page *spage, *dpage;
u64 src_addr, dst_addr;
dpage = migrate_pfn_to_page(dst_pfns[i]);
if (!dpage || dst_pfns[i] == MIGRATE_PFN_ERROR)
@ -194,14 +200,10 @@ nouveau_dmem_fault_alloc_and_copy(struct vm_area_struct *vma,
continue;
}
dst_addr = fault->dma[fault->npages++];
chunk = spage->zone_device_data;
src_addr = page_to_pfn(spage) - chunk->pfn_first;
src_addr = (src_addr << PAGE_SHIFT) + chunk->bo->bo.offset;
ret = copy(drm, 1, NOUVEAU_APER_HOST, dst_addr,
NOUVEAU_APER_VRAM, src_addr);
ret = copy(drm, 1, NOUVEAU_APER_HOST,
fault->dma[fault->npages++],
NOUVEAU_APER_VRAM,
nouveau_dmem_page_addr(spage));
if (ret) {
dst_pfns[i] = MIGRATE_PFN_ERROR;
__free_page(dpage);
@ -687,18 +689,12 @@ nouveau_dmem_migrate_alloc_and_copy(struct vm_area_struct *vma,
/* Copy things over */
copy = drm->dmem->migrate.copy_func;
for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) {
struct nouveau_dmem_chunk *chunk;
struct page *spage, *dpage;
u64 src_addr, dst_addr;
dpage = migrate_pfn_to_page(dst_pfns[i]);
if (!dpage || dst_pfns[i] == MIGRATE_PFN_ERROR)
continue;
chunk = dpage->zone_device_data;
dst_addr = page_to_pfn(dpage) - chunk->pfn_first;
dst_addr = (dst_addr << PAGE_SHIFT) + chunk->bo->bo.offset;
spage = migrate_pfn_to_page(src_pfns[i]);
if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) {
nouveau_dmem_page_free_locked(drm, dpage);
@ -716,10 +712,10 @@ nouveau_dmem_migrate_alloc_and_copy(struct vm_area_struct *vma,
continue;
}
src_addr = migrate->dma[migrate->dma_nr++];
ret = copy(drm, 1, NOUVEAU_APER_VRAM, dst_addr,
NOUVEAU_APER_HOST, src_addr);
ret = copy(drm, 1, NOUVEAU_APER_VRAM,
nouveau_dmem_page_addr(dpage),
NOUVEAU_APER_HOST,
migrate->dma[migrate->dma_nr++]);
if (ret) {
nouveau_dmem_page_free_locked(drm, dpage);
dst_pfns[i] = 0;
@ -846,7 +842,6 @@ nouveau_dmem_convert_pfn(struct nouveau_drm *drm,
npages = (range->end - range->start) >> PAGE_SHIFT;
for (i = 0; i < npages; ++i) {
struct nouveau_dmem_chunk *chunk;
struct page *page;
uint64_t addr;
@ -864,10 +859,7 @@ nouveau_dmem_convert_pfn(struct nouveau_drm *drm,
continue;
}
chunk = page->zone_device_data;
addr = page_to_pfn(page) - chunk->pfn_first;
addr = (addr + chunk->bo->bo.mem.start) << PAGE_SHIFT;
addr = nouveau_dmem_page_addr(page);
range->pfns[i] &= ((1UL << range->pfn_shift) - 1);
range->pfns[i] |= (addr >> PAGE_SHIFT) << range->pfn_shift;
}