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@xxxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
---
Changes since v4:
- Patch against the Nouveau tree instead of the kernel
- Separated this patch from the rest of the series since it can be
merged alone
- Replaced all pci_map invokations with dma_map. As Daniel pointed
out, using the PCI API is deprecated:
Documentation/DMA-API-HOWTO.txt:
"Note that the DMA API works with any bus independent of the underlying
microprocessor architecture. You should use the DMA API rather than the
bus-specific DMA API, i.e., use the dma_map_*() interfaces rather than the
pci_map_*() interfaces."
- As a result, removed the page mapping wrappers which have become
unneeded.
drm/nouveau_bo.c | 22 ++++++++++++++++------
lib/core/os.h | 8 ++++----
nvkm/engine/device/base.c | 25 -------------------------
nvkm/include/core/device.h | 6 ------
nvkm/subdev/fb/nv50.c | 7 +++++--
nvkm/subdev/fb/nvc0.c | 7 +++++--
6 files changed, 30 insertions(+), 45 deletions(-)
diff --git a/drm/nouveau_bo.c b/drm/nouveau_bo.c
index 4db886f9f793..e4f2071c46c3 100644
--- a/drm/nouveau_bo.c
+++ b/drm/nouveau_bo.c
@@ -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);
}
}
diff --git a/lib/core/os.h b/lib/core/os.h
index 5f4f04fbff3d..596e083ffb36 100644
--- a/lib/core/os.h
+++ b/lib/core/os.h
@@ -644,7 +644,7 @@ dma_free_coherent(struct device *dev, size_t sz, void *vaddr, dma_addr_t bus)
*****************************************************************************/
#include <pciaccess.h>
-#define PCI_DMA_BIDIRECTIONAL 1
+#define DMA_BIDIRECTIONAL 1
#define PCI_CAP_ID_AGP 0x02
@@ -688,7 +688,7 @@ pci_resource_len(struct pci_dev *pdev, int bar)
}
static inline dma_addr_t
-pci_map_page(struct pci_dev *pdev, struct page *page, int offset,
+dma_map_page(struct device *pdev, struct page *page, int offset,
int length, unsigned flags)
{
return 0;
@@ -696,13 +696,13 @@ pci_map_page(struct pci_dev *pdev, struct page *page, int offset,
static inline bool
-pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t addr)
+dma_mapping_error(struct device *pdev, dma_addr_t addr)
{
return true;
}
static inline void
-pci_unmap_page(struct pci_dev *pdev, dma_addr_t addr, int size, unsigned flags)
+dma_unmap_page(struct device *pdev, dma_addr_t addr, int size, unsigned flags)
{
}
diff --git a/nvkm/engine/device/base.c b/nvkm/engine/device/base.c
index 466dda2f7a3a..6c16dabe13b3 100644
--- a/nvkm/engine/device/base.c
+++ b/nvkm/engine/device/base.c
@@ -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)
{
diff --git a/nvkm/include/core/device.h b/nvkm/include/core/device.h
index 9ce2ee9aa32e..03c039dcc61f 100644
--- a/nvkm/include/core/device.h
+++ b/nvkm/include/core/device.h
@@ -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);
diff --git a/nvkm/subdev/fb/nv50.c b/nvkm/subdev/fb/nv50.c
index 1fc55c1e91a1..7d88e17fa927 100644
--- a/nvkm/subdev/fb/nv50.c
+++ b/nvkm/subdev/fb/nv50.c
@@ -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);
}
diff --git a/nvkm/subdev/fb/nvc0.c b/nvkm/subdev/fb/nvc0.c
index 0670ae33ee45..9f5f3ac8d4c6 100644
--- a/nvkm/subdev/fb/nvc0.c
+++ b/nvkm/subdev/fb/nvc0.c
@@ -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;
}
--
2.0.3
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