Make vm handle buffer objects instead of ttm objects.

Remove ttm objects.
Make vm aware of PCI memory type buffer objects.
(Only works for pre 2.6.16 kernels for now).

1 files changed, 181 insertions, 164 deletions

diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index 63cf6f56..93d1c0b8 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -41,8 +41,9 @@
 
 static void drm_vm_open(struct vm_area_struct *vma);
 static void drm_vm_close(struct vm_area_struct *vma);
-static void drm_vm_ttm_close(struct vm_area_struct *vma);
-static void drm_vm_ttm_open(struct vm_area_struct *vma);
+static int drm_bo_mmap_locked(struct vm_area_struct *vma,
+			      struct file *filp,
+			      drm_local_map_t *map);
 
 
 pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma)
@@ -158,93 +159,6 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
 }
 #endif				/* __OS_HAS_AGP */
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21) || \
-     LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21))
-static
-#endif
-struct page *drm_vm_ttm_fault(struct vm_area_struct *vma, 
-			      struct fault_data *data)
-{
-	unsigned long address = data->address;
-	drm_local_map_t *map = (drm_local_map_t *) vma->vm_private_data;
-	unsigned long page_offset;
-	struct page *page;
-	drm_ttm_t *ttm; 
-	drm_buffer_manager_t *bm;
-	drm_device_t *dev;
-	unsigned long pfn;
-	int err;
-	pgprot_t pgprot;
-
-	if (!map) {
-		data->type = VM_FAULT_OOM;
-		return NULL;
-	}
-
-	if (address > vma->vm_end) {
-		data->type = VM_FAULT_SIGBUS;
-		return NULL;
-	}
-
-	ttm = (drm_ttm_t *) map->offset;
-	
-	dev = ttm->dev;
-
-	/*
-	 * Perhaps retry here?
-	 */
-
-	mutex_lock(&dev->struct_mutex);
-	drm_fixup_ttm_caching(ttm);
-
-	bm = &dev->bm;
-	page_offset = (address - vma->vm_start) >> PAGE_SHIFT;
-	page = ttm->pages[page_offset];
-
-	if (!page) {
-		if (drm_alloc_memctl(PAGE_SIZE)) {
-			data->type = VM_FAULT_OOM;
-			goto out;
-		}
-		page = ttm->pages[page_offset] = 
-			alloc_page(GFP_KERNEL | __GFP_ZERO | GFP_DMA32);
-		if (!page) {
-			drm_free_memctl(PAGE_SIZE);
-			data->type = VM_FAULT_OOM;
-			goto out;
-		}
-		++bm->cur_pages;
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
-		SetPageLocked(page);
-#else
-		SetPageReserved(page);
-#endif
-	}
-
-	if ((ttm->page_flags & DRM_TTM_PAGE_UNCACHED) && 
-	    !(ttm->be->flags & DRM_BE_FLAG_CMA)) {
-
-		pfn = ttm->aper_offset + page_offset + 
-			(ttm->be->aperture_base >> PAGE_SHIFT);
-		pgprot = drm_io_prot(ttm->be->drm_map_type, vma);
-	} else {
-		pfn = page_to_pfn(page);
-		pgprot = vma->vm_page_prot;
-	}
-	
-	err = vm_insert_pfn(vma, address, pfn, pgprot);
-
-	if (!err || err == -EBUSY) 
-		data->type = VM_FAULT_MINOR; 
-	else
-		data->type = VM_FAULT_OOM;
- out:
-	mutex_unlock(&dev->struct_mutex);
-	return NULL;
-}
-#endif
-
 /**
  * \c nopage method for shared virtual memory.
  *
@@ -504,20 +418,6 @@ static struct vm_operations_struct drm_vm_sg_ops = {
 	.close = drm_vm_close,
 };
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21))
-static struct vm_operations_struct drm_vm_ttm_ops = {
-	.nopage = drm_vm_ttm_nopage,
-	.open = drm_vm_ttm_open,
-	.close = drm_vm_ttm_close,
-};
-#else
-static struct vm_operations_struct drm_vm_ttm_ops = {
-	.fault = drm_vm_ttm_fault,
-	.open = drm_vm_ttm_open,
-	.close = drm_vm_ttm_close,
-};
-#endif
-
 /**
  * \c open method for shared virtual memory.
  *
@@ -555,28 +455,6 @@ static void drm_vm_open(struct vm_area_struct *vma)
 	mutex_unlock(&dev->struct_mutex);
 }
 
-static void drm_vm_ttm_open_locked(struct vm_area_struct *vma) {
-  
-	drm_local_map_t *map = (drm_local_map_t *)vma->vm_private_data;
-	drm_ttm_t *ttm;
-
-	drm_vm_open_locked(vma);
-	ttm = (drm_ttm_t *) map->offset;
-	atomic_inc(&ttm->vma_count);
-#ifdef DRM_ODD_MM_COMPAT
-	drm_ttm_add_vma(ttm, vma);
-#endif
-}
-
-static void drm_vm_ttm_open(struct vm_area_struct *vma) {
-	drm_file_t *priv = vma->vm_file->private_data;
-	drm_device_t *dev = priv->head->dev;
-	
-	mutex_lock(&dev->struct_mutex);
-	drm_vm_ttm_open_locked(vma);
-	mutex_unlock(&dev->struct_mutex);
-}
-
 /**
  * \c close method for all virtual memory types.
  *
@@ -611,34 +489,6 @@ static void drm_vm_close(struct vm_area_struct *vma)
 }
 
 
-static void drm_vm_ttm_close(struct vm_area_struct *vma)
-{
-	drm_local_map_t *map = (drm_local_map_t *) vma->vm_private_data; 
-	drm_ttm_t *ttm; 
-        drm_device_t *dev;
-	int ret;
-
-	drm_vm_close(vma); 
-	if (map) {
-		ttm = (drm_ttm_t *) map->offset;
-		dev = ttm->dev;
-		mutex_lock(&dev->struct_mutex);
-#ifdef DRM_ODD_MM_COMPAT
-		drm_ttm_delete_vma(ttm, vma);
-#endif
-		if (atomic_dec_and_test(&ttm->vma_count)) {
-			if (ttm->destroy) {
-				ret = drm_destroy_ttm(ttm);
-				BUG_ON(ret);
-				drm_ctl_free(map, sizeof(*map), DRM_MEM_TTM);
-			}
-		}
-		mutex_unlock(&dev->struct_mutex);
-	}
-	return;
-}
-
-
 /**
  * mmap DMA memory.
  *
@@ -834,17 +684,8 @@ static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
 		vma->vm_private_data = (void *)map;
 		vma->vm_flags |= VM_RESERVED;
 		break;
-	case _DRM_TTM: {
-		vma->vm_ops = &drm_vm_ttm_ops;
-		vma->vm_private_data = (void *) map;
-		vma->vm_file = filp;
-		vma->vm_flags |= VM_RESERVED | VM_IO;
-#ifdef DRM_ODD_MM_COMPAT
-		drm_ttm_map_bound(vma);
-#endif		
-		drm_vm_ttm_open_locked(vma);
-		return 0;
-	}
+	case _DRM_TTM: 
+		return drm_bo_mmap_locked(vma, filp, map);
 	default:
 		return -EINVAL;	/* This should never happen. */
 	}
@@ -868,3 +709,179 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 	return ret;
 }
 EXPORT_SYMBOL(drm_mmap);
+
+/**
+ * buffer object vm functions.
+ */
+
+/**
+ * \c Pagefault method for buffer objects.
+ *
+ * \param vma Virtual memory area.
+ * \param data Fault data on failure or refault.
+ * \return Always NULL as we insert pfns directly.
+ */
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21) || \
+     LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21))
+static
+#endif
+struct page *drm_bo_vm_fault(struct vm_area_struct *vma, 
+			     struct fault_data *data)
+{
+	unsigned long address = data->address;
+	drm_buffer_object_t *bo = (drm_buffer_object_t *) vma->vm_private_data;
+	drm_local_map_t *map;
+	unsigned long page_offset;
+	struct page *page = NULL;
+	drm_ttm_t *ttm; 
+	drm_buffer_manager_t *bm;
+	drm_device_t *dev;
+	unsigned long pfn;
+	int err;
+	pgprot_t pgprot;
+	unsigned long bus_base;
+	unsigned long bus_offset;
+	unsigned long bus_size;
+	
+
+	mutex_lock(&bo->mutex);
+	map = bo->map_list.map;
+
+	if (!map) {
+		data->type = VM_FAULT_OOM;
+		goto out_unlock;
+	}
+
+	if (address > vma->vm_end) {
+		data->type = VM_FAULT_SIGBUS;
+		goto out_unlock;
+	}
+
+	dev = bo->dev;
+	err = drm_bo_pci_offset(bo, &bus_base, &bus_offset, &bus_size);
+
+	if (err) {
+		data->type = VM_FAULT_SIGBUS;
+		goto out_unlock;
+	}
+
+	page_offset = (address - vma->vm_start) >> PAGE_SHIFT;
+
+	if (bus_size) {
+		pfn = ((bus_base + bus_offset) >> PAGE_SHIFT) + page_offset;
+		pgprot = drm_io_prot(_DRM_AGP, vma);
+	} else {
+		bm = &dev->bm;
+		ttm = bo->ttm;
+
+		page = ttm->pages[page_offset];
+		if (!page) {
+			page = drm_ttm_alloc_page();
+			if (!page) {
+				data->type = VM_FAULT_OOM;
+				goto out_unlock;
+			}
+			ttm->pages[page_offset] = page;
+			++bm->cur_pages;
+		}
+		pfn = page_to_pfn(page);
+		pgprot = vma->vm_page_prot;
+	}
+	
+	err = vm_insert_pfn(vma, address, pfn, pgprot);
+
+	if (!err || err == -EBUSY) 
+		data->type = VM_FAULT_MINOR; 
+	else
+		data->type = VM_FAULT_OOM;
+out_unlock:
+	mutex_unlock(&bo->mutex);
+	return NULL;
+}
+#endif
+
+static void drm_bo_vm_open_locked(struct vm_area_struct *vma)
+{
+	drm_buffer_object_t *bo = (drm_buffer_object_t *) vma->vm_private_data;
+
+	drm_vm_open_locked(vma);
+	atomic_inc(&bo->usage);
+#ifdef DRM_MM_ODD_COMPAT
+	drm_bo_vm_add_vma(bo, vma);
+#endif
+}
+
+/**
+ * \c vma open method for buffer objects.
+ *
+ * \param vma virtual memory area.
+ */
+
+static void drm_bo_vm_open(struct vm_area_struct *vma)
+{
+	drm_buffer_object_t *bo = (drm_buffer_object_t *) vma->vm_private_data;
+	drm_device_t *dev = bo->dev;
+
+	mutex_lock(&dev->struct_mutex);
+	drm_bo_vm_open_locked(vma);
+	mutex_unlock(&dev->struct_mutex);
+}
+
+/**
+ * \c vma close method for buffer objects.
+ *
+ * \param vma virtual memory area.
+ */
+
+static void drm_bo_vm_close(struct vm_area_struct *vma)
+{
+	drm_buffer_object_t *bo = (drm_buffer_object_t *) vma->vm_private_data;
+	drm_device_t *dev = bo->dev;
+
+	drm_vm_close(vma);
+	if (bo) {
+		mutex_lock(&dev->struct_mutex);
+#ifdef DRM_MM_ODD_COMPAT
+		drm_bo_vm_delete_vma(bo, vma);
+#endif
+		drm_bo_usage_deref_locked(bo);
+		mutex_unlock(&dev->struct_mutex);
+	}
+	return;
+}
+
+static struct vm_operations_struct drm_bo_vm_ops = {
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21))
+	.nopage = drm_bo_vm_nopage,
+#else
+	.fault = drm_bo_vm_fault,
+#endif
+	.open = drm_bo_vm_open,
+	.close = drm_bo_vm_close,
+};
+
+/**
+ * mmap buffer object memory.
+ *
+ * \param vma virtual memory area.
+ * \param filp file pointer.
+ * \param map The buffer object drm map.
+ * \return zero on success or a negative number on failure.
+ */
+
+int drm_bo_mmap_locked(struct vm_area_struct *vma,
+		       struct file *filp,
+		       drm_local_map_t *map)
+{
+	vma->vm_ops = &drm_bo_vm_ops;
+	vma->vm_private_data = map->handle;
+	vma->vm_file = filp;
+	vma->vm_flags |= VM_RESERVED | VM_IO;
+	drm_bo_vm_open_locked(vma);
+#ifdef DRM_ODD_MM_COMPAT
+	drm_ttm_map_bound(vma);
+#endif		
+	return 0;
+}