1 files changed, 472 insertions, 0 deletions

diff --git a/drivers/staging/vboxvideo/vbox_ttm.c b/drivers/staging/vboxvideo/vbox_ttm.c
new file mode 100644
index 000000000000..34a905d40735
--- /dev/null
+++ b/drivers/staging/vboxvideo/vbox_ttm.c
@@ -0,0 +1,472 @@
+/*
+ * Copyright (C) 2013-2017 Oracle Corporation
+ * This file is based on ast_ttm.c
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ * Authors: Dave Airlie <airlied@redhat.com>
+ *          Michael Thayer <michael.thayer@oracle.com>
+ */
+#include "vbox_drv.h"
+#include <ttm/ttm_page_alloc.h>
+
+static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd)
+{
+	return container_of(bd, struct vbox_private, ttm.bdev);
+}
+
+static int vbox_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+	return ttm_mem_global_init(ref->object);
+}
+
+static void vbox_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+	ttm_mem_global_release(ref->object);
+}
+
+/**
+ * Adds the vbox memory manager object/structures to the global memory manager.
+ */
+static int vbox_ttm_global_init(struct vbox_private *vbox)
+{
+	struct drm_global_reference *global_ref;
+	int ret;
+
+	global_ref = &vbox->ttm.mem_global_ref;
+	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
+	global_ref->size = sizeof(struct ttm_mem_global);
+	global_ref->init = &vbox_ttm_mem_global_init;
+	global_ref->release = &vbox_ttm_mem_global_release;
+	ret = drm_global_item_ref(global_ref);
+	if (ret) {
+		DRM_ERROR("Failed setting up TTM memory subsystem.\n");
+		return ret;
+	}
+
+	vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object;
+	global_ref = &vbox->ttm.bo_global_ref.ref;
+	global_ref->global_type = DRM_GLOBAL_TTM_BO;
+	global_ref->size = sizeof(struct ttm_bo_global);
+	global_ref->init = &ttm_bo_global_init;
+	global_ref->release = &ttm_bo_global_release;
+
+	ret = drm_global_item_ref(global_ref);
+	if (ret) {
+		DRM_ERROR("Failed setting up TTM BO subsystem.\n");
+		drm_global_item_unref(&vbox->ttm.mem_global_ref);
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * Removes the vbox memory manager object from the global memory manager.
+ */
+static void vbox_ttm_global_release(struct vbox_private *vbox)
+{
+	drm_global_item_unref(&vbox->ttm.bo_global_ref.ref);
+	drm_global_item_unref(&vbox->ttm.mem_global_ref);
+}
+
+static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
+{
+	struct vbox_bo *bo;
+
+	bo = container_of(tbo, struct vbox_bo, bo);
+
+	drm_gem_object_release(&bo->gem);
+	kfree(bo);
+}
+
+static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
+{
+	if (bo->destroy == &vbox_bo_ttm_destroy)
+		return true;
+
+	return false;
+}
+
+static int
+vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
+		      struct ttm_mem_type_manager *man)
+{
+	switch (type) {
+	case TTM_PL_SYSTEM:
+		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->available_caching = TTM_PL_MASK_CACHING;
+		man->default_caching = TTM_PL_FLAG_CACHED;
+		break;
+	case TTM_PL_VRAM:
+		man->func = &ttm_bo_manager_func;
+		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
+		man->default_caching = TTM_PL_FLAG_WC;
+		break;
+	default:
+		DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void
+vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
+{
+	struct vbox_bo *vboxbo = vbox_bo(bo);
+
+	if (!vbox_ttm_bo_is_vbox_bo(bo))
+		return;
+
+	vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
+	*pl = vboxbo->placement;
+}
+
+static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
+				 struct file *filp)
+{
+	return 0;
+}
+
+static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
+				   struct ttm_mem_reg *mem)
+{
+	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+	struct vbox_private *vbox = vbox_bdev(bdev);
+
+	mem->bus.addr = NULL;
+	mem->bus.offset = 0;
+	mem->bus.size = mem->num_pages << PAGE_SHIFT;
+	mem->bus.base = 0;
+	mem->bus.is_iomem = false;
+	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+		return -EINVAL;
+	switch (mem->mem_type) {
+	case TTM_PL_SYSTEM:
+		/* system memory */
+		return 0;
+	case TTM_PL_VRAM:
+		mem->bus.offset = mem->start << PAGE_SHIFT;
+		mem->bus.base = pci_resource_start(vbox->dev->pdev, 0);
+		mem->bus.is_iomem = true;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
+				 struct ttm_mem_reg *mem)
+{
+}
+
+static int vbox_bo_move(struct ttm_buffer_object *bo,
+			bool evict, bool interruptible,
+			bool no_wait_gpu, struct ttm_mem_reg *new_mem)
+{
+	return ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu, new_mem);
+}
+
+static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
+{
+	ttm_tt_fini(tt);
+	kfree(tt);
+}
+
+static struct ttm_backend_func vbox_tt_backend_func = {
+	.destroy = &vbox_ttm_backend_destroy,
+};
+
+static struct ttm_tt *vbox_ttm_tt_create(struct ttm_bo_device *bdev,
+					 unsigned long size,
+					 u32 page_flags,
+					 struct page *dummy_read_page)
+{
+	struct ttm_tt *tt;
+
+	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
+	if (!tt)
+		return NULL;
+
+	tt->func = &vbox_tt_backend_func;
+	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+		kfree(tt);
+		return NULL;
+	}
+
+	return tt;
+}
+
+static int vbox_ttm_tt_populate(struct ttm_tt *ttm)
+{
+	return ttm_pool_populate(ttm);
+}
+
+static void vbox_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+	ttm_pool_unpopulate(ttm);
+}
+
+struct ttm_bo_driver vbox_bo_driver = {
+	.ttm_tt_create = vbox_ttm_tt_create,
+	.ttm_tt_populate = vbox_ttm_tt_populate,
+	.ttm_tt_unpopulate = vbox_ttm_tt_unpopulate,
+	.init_mem_type = vbox_bo_init_mem_type,
+	.eviction_valuable = ttm_bo_eviction_valuable,
+	.evict_flags = vbox_bo_evict_flags,
+	.move = vbox_bo_move,
+	.verify_access = vbox_bo_verify_access,
+	.io_mem_reserve = &vbox_ttm_io_mem_reserve,
+	.io_mem_free = &vbox_ttm_io_mem_free,
+	.io_mem_pfn = ttm_bo_default_io_mem_pfn,
+};
+
+int vbox_mm_init(struct vbox_private *vbox)
+{
+	int ret;
+	struct drm_device *dev = vbox->dev;
+	struct ttm_bo_device *bdev = &vbox->ttm.bdev;
+
+	ret = vbox_ttm_global_init(vbox);
+	if (ret)
+		return ret;
+
+	ret = ttm_bo_device_init(&vbox->ttm.bdev,
+				 vbox->ttm.bo_global_ref.ref.object,
+				 &vbox_bo_driver,
+				 dev->anon_inode->i_mapping,
+				 DRM_FILE_PAGE_OFFSET, true);
+	if (ret) {
+		DRM_ERROR("Error initialising bo driver; %d\n", ret);
+		goto err_ttm_global_release;
+	}
+
+	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
+			     vbox->available_vram_size >> PAGE_SHIFT);
+	if (ret) {
+		DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
+		goto err_device_release;
+	}
+
+#ifdef DRM_MTRR_WC
+	vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
+				     pci_resource_len(dev->pdev, 0),
+				     DRM_MTRR_WC);
+#else
+	vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
+					 pci_resource_len(dev->pdev, 0));
+#endif
+	return 0;
+
+err_device_release:
+	ttm_bo_device_release(&vbox->ttm.bdev);
+err_ttm_global_release:
+	vbox_ttm_global_release(vbox);
+	return ret;
+}
+
+void vbox_mm_fini(struct vbox_private *vbox)
+{
+#ifdef DRM_MTRR_WC
+	drm_mtrr_del(vbox->fb_mtrr,
+		     pci_resource_start(vbox->dev->pdev, 0),
+		     pci_resource_len(vbox->dev->pdev, 0), DRM_MTRR_WC);
+#else
+	arch_phys_wc_del(vbox->fb_mtrr);
+#endif
+	ttm_bo_device_release(&vbox->ttm.bdev);
+	vbox_ttm_global_release(vbox);
+}
+
+void vbox_ttm_placement(struct vbox_bo *bo, int domain)
+{
+	unsigned int i;
+	u32 c = 0;
+
+	bo->placement.placement = bo->placements;
+	bo->placement.busy_placement = bo->placements;
+
+	if (domain & TTM_PL_FLAG_VRAM)
+		bo->placements[c++].flags =
+		    TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
+	if (domain & TTM_PL_FLAG_SYSTEM)
+		bo->placements[c++].flags =
+		    TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+	if (!c)
+		bo->placements[c++].flags =
+		    TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+
+	bo->placement.num_placement = c;
+	bo->placement.num_busy_placement = c;
+
+	for (i = 0; i < c; ++i) {
+		bo->placements[i].fpfn = 0;
+		bo->placements[i].lpfn = 0;
+	}
+}
+
+int vbox_bo_create(struct drm_device *dev, int size, int align,
+		   u32 flags, struct vbox_bo **pvboxbo)
+{
+	struct vbox_private *vbox = dev->dev_private;
+	struct vbox_bo *vboxbo;
+	size_t acc_size;
+	int ret;
+
+	vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
+	if (!vboxbo)
+		return -ENOMEM;
+
+	ret = drm_gem_object_init(dev, &vboxbo->gem, size);
+	if (ret)
+		goto err_free_vboxbo;
+
+	vboxbo->bo.bdev = &vbox->ttm.bdev;
+
+	vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
+
+	acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
+				       sizeof(struct vbox_bo));
+
+	ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
+			  ttm_bo_type_device, &vboxbo->placement,
+			  align >> PAGE_SHIFT, false, NULL, acc_size,
+			  NULL, NULL, vbox_bo_ttm_destroy);
+	if (ret)
+		goto err_free_vboxbo;
+
+	*pvboxbo = vboxbo;
+
+	return 0;
+
+err_free_vboxbo:
+	kfree(vboxbo);
+	return ret;
+}
+
+static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
+{
+	return bo->bo.offset;
+}
+
+int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag, u64 *gpu_addr)
+{
+	int i, ret;
+
+	if (bo->pin_count) {
+		bo->pin_count++;
+		if (gpu_addr)
+			*gpu_addr = vbox_bo_gpu_offset(bo);
+
+		return 0;
+	}
+
+	vbox_ttm_placement(bo, pl_flag);
+
+	for (i = 0; i < bo->placement.num_placement; i++)
+		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
+
+	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+	if (ret)
+		return ret;
+
+	bo->pin_count = 1;
+
+	if (gpu_addr)
+		*gpu_addr = vbox_bo_gpu_offset(bo);
+
+	return 0;
+}
+
+int vbox_bo_unpin(struct vbox_bo *bo)
+{
+	int i, ret;
+
+	if (!bo->pin_count) {
+		DRM_ERROR("unpin bad %p\n", bo);
+		return 0;
+	}
+	bo->pin_count--;
+	if (bo->pin_count)
+		return 0;
+
+	for (i = 0; i < bo->placement.num_placement; i++)
+		bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
+
+	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+/*
+ * Move a vbox-owned buffer object to system memory if no one else has it
+ * pinned.  The caller must have pinned it previously, and this call will
+ * release the caller's pin.
+ */
+int vbox_bo_push_sysram(struct vbox_bo *bo)
+{
+	int i, ret;
+
+	if (!bo->pin_count) {
+		DRM_ERROR("unpin bad %p\n", bo);
+		return 0;
+	}
+	bo->pin_count--;
+	if (bo->pin_count)
+		return 0;
+
+	if (bo->kmap.virtual)
+		ttm_bo_kunmap(&bo->kmap);
+
+	vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
+
+	for (i = 0; i < bo->placement.num_placement; i++)
+		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
+
+	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+	if (ret) {
+		DRM_ERROR("pushing to VRAM failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_file *file_priv;
+	struct vbox_private *vbox;
+
+	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+		return -EINVAL;
+
+	file_priv = filp->private_data;
+	vbox = file_priv->minor->dev->dev_private;
+
+	return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
+}