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path: root/drivers/gpu/drm/ttm/ttm_bo_vm.c
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Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_bo_vm.c')
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo_vm.c41
1 files changed, 21 insertions, 20 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 668dbe8b8dd..fe6cb77899f 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -74,9 +74,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
vma->vm_private_data;
struct ttm_bo_device *bdev = bo->bdev;
- unsigned long bus_base;
- unsigned long bus_offset;
- unsigned long bus_size;
unsigned long page_offset;
unsigned long page_last;
unsigned long pfn;
@@ -84,7 +81,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
struct page *page;
int ret;
int i;
- bool is_iomem;
unsigned long address = (unsigned long)vmf->virtual_address;
int retval = VM_FAULT_NOPAGE;
@@ -101,8 +97,21 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
return VM_FAULT_NOPAGE;
}
- if (bdev->driver->fault_reserve_notify)
- bdev->driver->fault_reserve_notify(bo);
+ if (bdev->driver->fault_reserve_notify) {
+ ret = bdev->driver->fault_reserve_notify(bo);
+ switch (ret) {
+ case 0:
+ break;
+ case -EBUSY:
+ set_need_resched();
+ case -ERESTARTSYS:
+ retval = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ default:
+ retval = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
+ }
/*
* Wait for buffer data in transit, due to a pipelined
@@ -122,15 +131,12 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
spin_unlock(&bo->lock);
- ret = ttm_bo_pci_offset(bdev, &bo->mem, &bus_base, &bus_offset,
- &bus_size);
- if (unlikely(ret != 0)) {
+ ret = ttm_mem_io_reserve(bdev, &bo->mem);
+ if (ret) {
retval = VM_FAULT_SIGBUS;
goto out_unlock;
}
- is_iomem = (bus_size != 0);
-
page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
bo->vm_node->start - vma->vm_pgoff;
page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) +
@@ -154,8 +160,7 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
* vma->vm_page_prot when the object changes caching policy, with
* the correct locks held.
*/
-
- if (is_iomem) {
+ if (bo->mem.bus.is_iomem) {
vma->vm_page_prot = ttm_io_prot(bo->mem.placement,
vma->vm_page_prot);
} else {
@@ -171,10 +176,8 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
*/
for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
-
- if (is_iomem)
- pfn = ((bus_base + bus_offset) >> PAGE_SHIFT) +
- page_offset;
+ if (bo->mem.bus.is_iomem)
+ pfn = ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT) + page_offset;
else {
page = ttm_tt_get_page(ttm, page_offset);
if (unlikely(!page && i == 0)) {
@@ -198,7 +201,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
retval =
(ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
goto out_unlock;
-
}
address += PAGE_SIZE;
@@ -221,8 +223,7 @@ static void ttm_bo_vm_open(struct vm_area_struct *vma)
static void ttm_bo_vm_close(struct vm_area_struct *vma)
{
- struct ttm_buffer_object *bo =
- (struct ttm_buffer_object *)vma->vm_private_data;
+ struct ttm_buffer_object *bo = (struct ttm_buffer_object *)vma->vm_private_data;
ttm_bo_unref(&bo);
vma->vm_private_data = NULL;