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drm/nouveau/dmem: use physical vram addresses during migration copies

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Removes the need for temporary VMM mappings.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2019-02-15 14:45:57 +10:00
parent 6c762d1b18
commit fd5e985643
1 changed files with 4 additions and 20 deletions
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24
drivers/gpu/drm/nouveau/nouveau_dmem.c
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@ -63,7 +63,6 @@ struct nouveau_dmem_chunk {
unsigned long pfn_first;
unsigned long callocated;
unsigned long bitmap[BITS_TO_LONGS(DMEM_CHUNK_NPAGES)];
struct nvif_vma vma;
spinlock_t lock;
};
@ -272,10 +271,10 @@ nouveau_dmem_fault_alloc_and_copy(struct vm_area_struct *vma,
chunk = (void *)hmm_devmem_page_get_drvdata(spage);
src_addr = page_to_pfn(spage) - chunk->pfn_first;
src_addr = (src_addr << PAGE_SHIFT) + chunk->vma.addr;
src_addr = (src_addr << PAGE_SHIFT) + chunk->bo->bo.offset;
ret = copy(drm, 1, NOUVEAU_APER_VIRT, dst_addr,
NOUVEAU_APER_VIRT, src_addr);
NOUVEAU_APER_VRAM, src_addr);
if (ret) {
dst_pfns[i] = MIGRATE_PFN_ERROR;
__free_page(dpage);
@ -371,7 +370,6 @@ nouveau_dmem_devmem_ops = {
static int
nouveau_dmem_chunk_alloc(struct nouveau_drm *drm)
{
struct nvif_vmm *vmm = &drm->client.vmm.vmm;
struct nouveau_dmem_chunk *chunk;
int ret;
@ -390,11 +388,6 @@ nouveau_dmem_chunk_alloc(struct nouveau_drm *drm)
list_del(&chunk->list);
mutex_unlock(&drm->dmem->mutex);
ret = nvif_vmm_get(vmm, LAZY, false, 12, 0,
DMEM_CHUNK_SIZE, &chunk->vma);
if (ret)
goto out;
ret = nouveau_bo_new(&drm->client, DMEM_CHUNK_SIZE, 0,
TTM_PL_FLAG_VRAM, 0, 0, NULL, NULL,
&chunk->bo);
@ -407,13 +400,6 @@ nouveau_dmem_chunk_alloc(struct nouveau_drm *drm)
goto out;
}
ret = nouveau_mem_map(nouveau_mem(&chunk->bo->bo.mem), vmm, &chunk->vma);
if (ret) {
nouveau_bo_unpin(chunk->bo);
nouveau_bo_ref(NULL, &chunk->bo);
goto out;
}
bitmap_zero(chunk->bitmap, DMEM_CHUNK_NPAGES);
spin_lock_init(&chunk->lock);
@ -570,7 +556,6 @@ nouveau_dmem_suspend(struct nouveau_drm *drm)
void
nouveau_dmem_fini(struct nouveau_drm *drm)
{
struct nvif_vmm *vmm = &drm->client.vmm.vmm;
struct nouveau_dmem_chunk *chunk, *tmp;
if (drm->dmem == NULL)
@ -586,7 +571,6 @@ nouveau_dmem_fini(struct nouveau_drm *drm)
nouveau_bo_unpin(chunk->bo);
nouveau_bo_ref(NULL, &chunk->bo);
}
nvif_vmm_put(vmm, &chunk->vma);
list_del(&chunk->list);
kfree(chunk);
}
@ -792,7 +776,7 @@ nouveau_dmem_migrate_alloc_and_copy(struct vm_area_struct *vma,
chunk = (void *)hmm_devmem_page_get_drvdata(dpage);
dst_addr = page_to_pfn(dpage) - chunk->pfn_first;
dst_addr = (dst_addr << PAGE_SHIFT) + chunk->vma.addr;
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)) {
@ -804,7 +788,7 @@ nouveau_dmem_migrate_alloc_and_copy(struct vm_area_struct *vma,
src_addr = migrate->hmem.vma.addr + (c << PAGE_SHIFT);
c++;
ret = copy(drm, 1, NOUVEAU_APER_VIRT, dst_addr,
ret = copy(drm, 1, NOUVEAU_APER_VRAM, dst_addr,
NOUVEAU_APER_VIRT, src_addr);
if (ret) {
nouveau_dmem_page_free_locked(drm, dpage);