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drm/nouveau: map pages using DMA API 

The DMA API is the recommended way to map pages no matter what the
underlying bus is. Use the DMA functions for page mapping and remove
currently existing wrappers.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Alexandre Courbot 2014-07-31 18:09:42 +09:00 committed by Ben Skeggs
parent 3967633d2b
commit fd1496a0fc
5 changed files with 26 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/gpu/drm/nouveau/core/engine/device/base.c
View File

@ -487,31 +487,6 @@ nv_device_resource_len(struct nouveau_device *device, unsigned int bar)
}
}
dma_addr_t
nv_device_map_page(struct nouveau_device *device, struct page *page)
{
dma_addr_t ret;
if (nv_device_is_pci(device)) {
ret = pci_map_page(device->pdev, page, 0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(device->pdev, ret))
ret = 0;
} else {
ret = page_to_phys(page);
}
return ret;
}
void
nv_device_unmap_page(struct nouveau_device *device, dma_addr_t addr)
{
if (nv_device_is_pci(device))
pci_unmap_page(device->pdev, addr, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
}
int
nv_device_get_irq(struct nouveau_device *device, bool stall)
{

6
drivers/gpu/drm/nouveau/core/include/core/device.h
View File

@ -174,12 +174,6 @@ nv_device_resource_start(struct nouveau_device *device, unsigned int bar);
resource_size_t
nv_device_resource_len(struct nouveau_device *device, unsigned int bar);
dma_addr_t
nv_device_map_page(struct nouveau_device *device, struct page *page);
void
nv_device_unmap_page(struct nouveau_device *device, dma_addr_t addr);
int
nv_device_get_irq(struct nouveau_device *device, bool stall);

7
drivers/gpu/drm/nouveau/core/subdev/fb/nv50.c
View File

@ -250,7 +250,9 @@ nv50_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
priv->r100c08_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (priv->r100c08_page) {
priv->r100c08 = nv_device_map_page(device, priv->r100c08_page);
priv->r100c08 = dma_map_page(nv_device_base(device),
priv->r100c08_page, 0, PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (!priv->r100c08)
nv_warn(priv, "failed 0x100c08 page map\n");
} else {
@ -268,7 +270,8 @@ nv50_fb_dtor(struct nouveau_object *object)
struct nv50_fb_priv *priv = (void *)object;
if (priv->r100c08_page) {
nv_device_unmap_page(device, priv->r100c08);
dma_unmap_page(nv_device_base(device), priv->r100c08, PAGE_SIZE,
DMA_BIDIRECTIONAL);
__free_page(priv->r100c08_page);
}

7
drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c
View File

@ -70,7 +70,8 @@ nvc0_fb_dtor(struct nouveau_object *object)
struct nvc0_fb_priv *priv = (void *)object;
if (priv->r100c10_page) {
nv_device_unmap_page(device, priv->r100c10);
dma_unmap_page(nv_device_base(device), priv->r100c10, PAGE_SIZE,
DMA_BIDIRECTIONAL);
__free_page(priv->r100c10_page);
}
@ -93,7 +94,9 @@ nvc0_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (priv->r100c10_page) {
priv->r100c10 = nv_device_map_page(device, priv->r100c10_page);
priv->r100c10 = dma_map_page(nv_device_base(device),
priv->r100c10_page, 0, PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (!priv->r100c10)
return -EFAULT;
}

22
drivers/gpu/drm/nouveau/nouveau_bo.c
View File

@ -1340,6 +1340,7 @@ nouveau_ttm_tt_populate(struct ttm_tt *ttm)
struct nouveau_drm *drm;
struct nouveau_device *device;
struct drm_device *dev;
struct device *pdev;
unsigned i;
int r;
bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
@ -1358,6 +1359,7 @@ nouveau_ttm_tt_populate(struct ttm_tt *ttm)
drm = nouveau_bdev(ttm->bdev);
device = nv_device(drm->device);
dev = drm->dev;
pdev = nv_device_base(device);
#if __OS_HAS_AGP
if (drm->agp.stat == ENABLED) {
@ -1377,17 +1379,22 @@ nouveau_ttm_tt_populate(struct ttm_tt *ttm)
}
for (i = 0; i < ttm->num_pages; i++) {
ttm_dma->dma_address[i] = nv_device_map_page(device,
ttm->pages[i]);
if (!ttm_dma->dma_address[i]) {
dma_addr_t addr;
addr = dma_map_page(pdev, ttm->pages[i], 0, PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(pdev, addr)) {
while (--i) {
nv_device_unmap_page(device,
ttm_dma->dma_address[i]);
dma_unmap_page(pdev, ttm_dma->dma_address[i],
PAGE_SIZE, DMA_BIDIRECTIONAL);
ttm_dma->dma_address[i] = 0;
}
ttm_pool_unpopulate(ttm);
return -EFAULT;
}
ttm_dma->dma_address[i] = addr;
}
return 0;
}
@ -1399,6 +1406,7 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
struct nouveau_drm *drm;
struct nouveau_device *device;
struct drm_device *dev;
struct device *pdev;
unsigned i;
bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
@ -1408,6 +1416,7 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
drm = nouveau_bdev(ttm->bdev);
device = nv_device(drm->device);
dev = drm->dev;
pdev = nv_device_base(device);
#if __OS_HAS_AGP
if (drm->agp.stat == ENABLED) {
@ -1425,7 +1434,8 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
for (i = 0; i < ttm->num_pages; i++) {
if (ttm_dma->dma_address[i]) {
nv_device_unmap_page(device, ttm_dma->dma_address[i]);
dma_unmap_page(pdev, ttm_dma->dma_address[i], PAGE_SIZE,
DMA_BIDIRECTIONAL);
}
}