summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--linux-core/drm_compat.c99
-rw-r--r--linux-core/drm_compat.h3
-rw-r--r--linux-core/drm_vm.c35
3 files changed, 120 insertions, 17 deletions
diff --git a/linux-core/drm_compat.c b/linux-core/drm_compat.c
index aa825f32..d06b9d24 100644
--- a/linux-core/drm_compat.c
+++ b/linux-core/drm_compat.c
@@ -806,3 +806,102 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type,
EXPORT_SYMBOL(kmap_atomic_prot_pfn);
#endif
+#ifdef DRM_FULL_MM_COMPAT
+#ifdef DRM_NO_FAULT
+unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
+ unsigned long address)
+{
+ struct drm_buffer_object *bo = (struct drm_buffer_object *) vma->vm_private_data;
+ unsigned long page_offset;
+ struct page *page = NULL;
+ struct drm_ttm *ttm;
+ struct drm_device *dev;
+ unsigned long pfn;
+ int err;
+ unsigned long bus_base;
+ unsigned long bus_offset;
+ unsigned long bus_size;
+ unsigned long ret = NOPFN_REFAULT;
+
+ if (address > vma->vm_end)
+ return NOPFN_SIGBUS;
+
+ dev = bo->dev;
+ err = drm_bo_read_lock(&dev->bm.bm_lock, 1);
+ if (err)
+ return NOPFN_REFAULT;
+
+ err = mutex_lock_interruptible(&bo->mutex);
+ if (err) {
+ drm_bo_read_unlock(&dev->bm.bm_lock);
+ return NOPFN_REFAULT;
+ }
+
+ err = drm_bo_wait(bo, 0, 1, 0, 1);
+ if (err) {
+ ret = (err != -EAGAIN) ? NOPFN_SIGBUS : NOPFN_REFAULT;
+ bo->priv_flags &= ~_DRM_BO_FLAG_UNLOCKED;
+ goto out_unlock;
+ }
+
+ bo->priv_flags &= ~_DRM_BO_FLAG_UNLOCKED;
+
+ /*
+ * If buffer happens to be in a non-mappable location,
+ * move it to a mappable.
+ */
+
+ if (!(bo->mem.flags & DRM_BO_FLAG_MAPPABLE)) {
+ uint32_t new_flags = bo->mem.proposed_flags |
+ DRM_BO_FLAG_MAPPABLE |
+ DRM_BO_FLAG_FORCE_MAPPABLE;
+ err = drm_bo_move_buffer(bo, new_flags, 0, 0);
+ if (err) {
+ ret = (err != -EAGAIN) ? NOPFN_SIGBUS : NOPFN_REFAULT;
+ goto out_unlock;
+ }
+ }
+
+ err = drm_bo_pci_offset(dev, &bo->mem, &bus_base, &bus_offset,
+ &bus_size);
+
+ if (err) {
+ ret = NOPFN_SIGBUS;
+ goto out_unlock;
+ }
+
+ page_offset = (address - vma->vm_start) >> PAGE_SHIFT;
+
+ if (bus_size) {
+ struct drm_mem_type_manager *man = &dev->bm.man[bo->mem.mem_type];
+
+ pfn = ((bus_base + bus_offset) >> PAGE_SHIFT) + page_offset;
+ vma->vm_page_prot = drm_io_prot(man->drm_bus_maptype, vma);
+ } else {
+ ttm = bo->ttm;
+
+ drm_ttm_fixup_caching(ttm);
+ page = drm_ttm_get_page(ttm, page_offset);
+ if (!page) {
+ ret = NOPFN_OOM;
+ goto out_unlock;
+ }
+ pfn = page_to_pfn(page);
+ vma->vm_page_prot = (bo->mem.flags & DRM_BO_FLAG_CACHED) ?
+ vm_get_page_prot(vma->vm_flags) :
+ drm_io_prot(_DRM_TTM, vma);
+ }
+
+ err = vm_insert_pfn(vma, address, pfn);
+ if (err) {
+ ret = (err != -EAGAIN) ? NOPFN_OOM : NOPFN_REFAULT;
+ goto out_unlock;
+ }
+out_unlock:
+ BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNLOCKED);
+ mutex_unlock(&bo->mutex);
+ drm_bo_read_unlock(&dev->bm.bm_lock);
+ return ret;
+}
+#endif
+#endif
diff --git a/linux-core/drm_compat.h b/linux-core/drm_compat.h
index cfa4fc6d..19dc1f67 100644
--- a/linux-core/drm_compat.h
+++ b/linux-core/drm_compat.h
@@ -319,6 +319,9 @@ extern int drm_bo_map_bound(struct vm_area_struct *vma);
/* fixme when functions are upstreamed - upstreamed for 2.6.23 */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23))
#define DRM_IDR_COMPAT_FN
+#define DRM_NO_FAULT
+extern unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
+ unsigned long address);
#endif
#ifdef DRM_IDR_COMPAT_FN
int idr_for_each(struct idr *idp,
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index 6618c0ae..0d5242d3 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -685,8 +685,8 @@ EXPORT_SYMBOL(drm_mmap);
* \c Pagefault method for buffer objects.
*
* \param vma Virtual memory area.
- * \param address File offset.
- * \return Error or refault. The pfn is manually inserted.
+ * \param vmf vm fault data
+ * \return Error or VM_FAULT_NOPAGE:. The pfn is manually inserted.
*
* It's important that pfns are inserted while holding the bo->mutex lock.
* otherwise we might race with unmap_mapping_range() which is always
@@ -699,8 +699,8 @@ EXPORT_SYMBOL(drm_mmap);
*/
#ifdef DRM_FULL_MM_COMPAT
-static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
- unsigned long address)
+static int drm_bo_vm_fault(struct vm_area_struct *vma,
+ struct vm_fault *vmf)
{
struct drm_buffer_object *bo = (struct drm_buffer_object *) vma->vm_private_data;
unsigned long page_offset;
@@ -712,25 +712,22 @@ static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
unsigned long bus_base;
unsigned long bus_offset;
unsigned long bus_size;
- unsigned long ret = NOPFN_REFAULT;
-
- if (address > vma->vm_end)
- return NOPFN_SIGBUS;
+ unsigned long ret = VM_FAULT_NOPAGE;
dev = bo->dev;
err = drm_bo_read_lock(&dev->bm.bm_lock, 1);
if (err)
- return NOPFN_REFAULT;
+ return VM_FAULT_NOPAGE;
err = mutex_lock_interruptible(&bo->mutex);
if (err) {
drm_bo_read_unlock(&dev->bm.bm_lock);
- return NOPFN_REFAULT;
+ return VM_FAULT_NOPAGE;
}
err = drm_bo_wait(bo, 0, 1, 0, 1);
if (err) {
- ret = (err != -EAGAIN) ? NOPFN_SIGBUS : NOPFN_REFAULT;
+ ret = (err != -EAGAIN) ? VM_FAULT_SIGBUS : VM_FAULT_NOPAGE;
bo->priv_flags &= ~_DRM_BO_FLAG_UNLOCKED;
goto out_unlock;
}
@@ -748,7 +745,7 @@ static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
DRM_BO_FLAG_FORCE_MAPPABLE;
err = drm_bo_move_buffer(bo, new_flags, 0, 0);
if (err) {
- ret = (err != -EAGAIN) ? NOPFN_SIGBUS : NOPFN_REFAULT;
+ ret = (err != -EAGAIN) ? VM_FAULT_SIGBUS : VM_FAULT_NOPAGE;
goto out_unlock;
}
}
@@ -757,11 +754,11 @@ static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
&bus_size);
if (err) {
- ret = NOPFN_SIGBUS;
+ ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
- page_offset = (address - vma->vm_start) >> PAGE_SHIFT;
+ page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> PAGE_SHIFT;
if (bus_size) {
struct drm_mem_type_manager *man = &dev->bm.man[bo->mem.mem_type];
@@ -774,7 +771,7 @@ static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
drm_ttm_fixup_caching(ttm);
page = drm_ttm_get_page(ttm, page_offset);
if (!page) {
- ret = NOPFN_OOM;
+ ret = VM_FAULT_OOM;
goto out_unlock;
}
pfn = page_to_pfn(page);
@@ -783,9 +780,9 @@ static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
drm_io_prot(_DRM_TTM, vma);
}
- err = vm_insert_pfn(vma, address, pfn);
+ err = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn);
if (err) {
- ret = (err != -EAGAIN) ? NOPFN_OOM : NOPFN_REFAULT;
+ ret = (err != -EAGAIN) ? VM_FAULT_OOM : VM_FAULT_NOPAGE;
goto out_unlock;
}
out_unlock:
@@ -849,8 +846,12 @@ static void drm_bo_vm_close(struct vm_area_struct *vma)
static struct vm_operations_struct drm_bo_vm_ops = {
#ifdef DRM_FULL_MM_COMPAT
+#ifdef DRM_NO_FAULT
.nopfn = drm_bo_vm_nopfn,
#else
+ .fault = drm_bo_vm_fault,
+#endif
+#else
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19))
.nopfn = drm_bo_vm_nopfn,
#else
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 15:21:56 +0000