Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 894 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
new file mode 100644
index 000000000..16594a0a6
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -0,0 +1,894 @@
+/*
+ * Copyright 2016 Advanced Micro Devices, 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, sublicense,
+ * 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 above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Christian König
+ */
+
+#include <linux/dma-mapping.h>
+#include <drm/ttm/ttm_range_manager.h>
+
+#include "amdgpu.h"
+#include "amdgpu_vm.h"
+#include "amdgpu_res_cursor.h"
+#include "amdgpu_atomfirmware.h"
+#include "atom.h"
+
+struct amdgpu_vram_reservation {
+	u64 start;
+	u64 size;
+	struct list_head allocated;
+	struct list_head blocks;
+};
+
+static inline struct amdgpu_vram_mgr *
+to_vram_mgr(struct ttm_resource_manager *man)
+{
+	return container_of(man, struct amdgpu_vram_mgr, manager);
+}
+
+static inline struct amdgpu_device *
+to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
+{
+	return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
+}
+
+static inline struct drm_buddy_block *
+amdgpu_vram_mgr_first_block(struct list_head *list)
+{
+	return list_first_entry_or_null(list, struct drm_buddy_block, link);
+}
+
+static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head)
+{
+	struct drm_buddy_block *block;
+	u64 start, size;
+
+	block = amdgpu_vram_mgr_first_block(head);
+	if (!block)
+		return false;
+
+	while (head != block->link.next) {
+		start = amdgpu_vram_mgr_block_start(block);
+		size = amdgpu_vram_mgr_block_size(block);
+
+		block = list_entry(block->link.next, struct drm_buddy_block, link);
+		if (start + size != amdgpu_vram_mgr_block_start(block))
+			return false;
+	}
+
+	return true;
+}
+
+
+
+/**
+ * DOC: mem_info_vram_total
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total VRAM
+ * available on the device
+ * The file mem_info_vram_total is used for this and returns the total
+ * amount of VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = drm_to_adev(ddev);
+
+	return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
+}
+
+/**
+ * DOC: mem_info_vis_vram_total
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total
+ * visible VRAM available on the device
+ * The file mem_info_vis_vram_total is used for this and returns the total
+ * amount of visible VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = drm_to_adev(ddev);
+
+	return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
+}
+
+/**
+ * DOC: mem_info_vram_used
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total VRAM
+ * available on the device
+ * The file mem_info_vram_used is used for this and returns the total
+ * amount of currently used VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = drm_to_adev(ddev);
+	struct ttm_resource_manager *man = &adev->mman.vram_mgr.manager;
+
+	return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
+}
+
+/**
+ * DOC: mem_info_vis_vram_used
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total of
+ * used visible VRAM
+ * The file mem_info_vis_vram_used is used for this and returns the total
+ * amount of currently used visible VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
+						  struct device_attribute *attr,
+						  char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = drm_to_adev(ddev);
+
+	return sysfs_emit(buf, "%llu\n",
+			  amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr));
+}
+
+/**
+ * DOC: mem_info_vram_vendor
+ *
+ * The amdgpu driver provides a sysfs API for reporting the vendor of the
+ * installed VRAM
+ * The file mem_info_vram_vendor is used for this and returns the name of the
+ * vendor.
+ */
+static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = drm_to_adev(ddev);
+
+	switch (adev->gmc.vram_vendor) {
+	case SAMSUNG:
+		return sysfs_emit(buf, "samsung\n");
+	case INFINEON:
+		return sysfs_emit(buf, "infineon\n");
+	case ELPIDA:
+		return sysfs_emit(buf, "elpida\n");
+	case ETRON:
+		return sysfs_emit(buf, "etron\n");
+	case NANYA:
+		return sysfs_emit(buf, "nanya\n");
+	case HYNIX:
+		return sysfs_emit(buf, "hynix\n");
+	case MOSEL:
+		return sysfs_emit(buf, "mosel\n");
+	case WINBOND:
+		return sysfs_emit(buf, "winbond\n");
+	case ESMT:
+		return sysfs_emit(buf, "esmt\n");
+	case MICRON:
+		return sysfs_emit(buf, "micron\n");
+	default:
+		return sysfs_emit(buf, "unknown\n");
+	}
+}
+
+static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
+		   amdgpu_mem_info_vram_total_show, NULL);
+static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
+		   amdgpu_mem_info_vis_vram_total_show,NULL);
+static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
+		   amdgpu_mem_info_vram_used_show, NULL);
+static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
+		   amdgpu_mem_info_vis_vram_used_show, NULL);
+static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
+		   amdgpu_mem_info_vram_vendor, NULL);
+
+static struct attribute *amdgpu_vram_mgr_attributes[] = {
+	&dev_attr_mem_info_vram_total.attr,
+	&dev_attr_mem_info_vis_vram_total.attr,
+	&dev_attr_mem_info_vram_used.attr,
+	&dev_attr_mem_info_vis_vram_used.attr,
+	&dev_attr_mem_info_vram_vendor.attr,
+	NULL
+};
+
+const struct attribute_group amdgpu_vram_mgr_attr_group = {
+	.attrs = amdgpu_vram_mgr_attributes
+};
+
+/**
+ * amdgpu_vram_mgr_vis_size - Calculate visible block size
+ *
+ * @adev: amdgpu_device pointer
+ * @block: DRM BUDDY block structure
+ *
+ * Calculate how many bytes of the DRM BUDDY block are inside visible VRAM
+ */
+static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
+				    struct drm_buddy_block *block)
+{
+	u64 start = amdgpu_vram_mgr_block_start(block);
+	u64 end = start + amdgpu_vram_mgr_block_size(block);
+
+	if (start >= adev->gmc.visible_vram_size)
+		return 0;
+
+	return (end > adev->gmc.visible_vram_size ?
+		adev->gmc.visible_vram_size : end) - start;
+}
+
+/**
+ * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
+ *
+ * @bo: &amdgpu_bo buffer object (must be in VRAM)
+ *
+ * Returns:
+ * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
+ */
+u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
+{
+	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
+	struct ttm_resource *res = bo->tbo.resource;
+	struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
+	struct drm_buddy_block *block;
+	u64 usage = 0;
+
+	if (amdgpu_gmc_vram_full_visible(&adev->gmc))
+		return amdgpu_bo_size(bo);
+
+	if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
+		return 0;
+
+	list_for_each_entry(block, &vres->blocks, link)
+		usage += amdgpu_vram_mgr_vis_size(adev, block);
+
+	return usage;
+}
+
+/* Commit the reservation of VRAM pages */
+static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
+{
+	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
+	struct amdgpu_device *adev = to_amdgpu_device(mgr);
+	struct drm_buddy *mm = &mgr->mm;
+	struct amdgpu_vram_reservation *rsv, *temp;
+	struct drm_buddy_block *block;
+	uint64_t vis_usage;
+
+	list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) {
+		if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size,
+					   rsv->size, mm->chunk_size, &rsv->allocated,
+					   DRM_BUDDY_RANGE_ALLOCATION))
+			continue;
+
+		block = amdgpu_vram_mgr_first_block(&rsv->allocated);
+		if (!block)
+			continue;
+
+		dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
+			rsv->start, rsv->size);
+
+		vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
+		atomic64_add(vis_usage, &mgr->vis_usage);
+		spin_lock(&man->bdev->lru_lock);
+		man->usage += rsv->size;
+		spin_unlock(&man->bdev->lru_lock);
+		list_move(&rsv->blocks, &mgr->reserved_pages);
+	}
+}
+
+/**
+ * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
+ *
+ * @mgr: amdgpu_vram_mgr pointer
+ * @start: start address of the range in VRAM
+ * @size: size of the range
+ *
+ * Reserve memory from start address with the specified size in VRAM
+ */
+int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
+				  uint64_t start, uint64_t size)
+{
+	struct amdgpu_vram_reservation *rsv;
+
+	rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
+	if (!rsv)
+		return -ENOMEM;
+
+	INIT_LIST_HEAD(&rsv->allocated);
+	INIT_LIST_HEAD(&rsv->blocks);
+
+	rsv->start = start;
+	rsv->size = size;
+
+	mutex_lock(&mgr->lock);
+	list_add_tail(&rsv->blocks, &mgr->reservations_pending);
+	amdgpu_vram_mgr_do_reserve(&mgr->manager);
+	mutex_unlock(&mgr->lock);
+
+	return 0;
+}
+
+/**
+ * amdgpu_vram_mgr_query_page_status - query the reservation status
+ *
+ * @mgr: amdgpu_vram_mgr pointer
+ * @start: start address of a page in VRAM
+ *
+ * Returns:
+ *	-EBUSY: the page is still hold and in pending list
+ *	0: the page has been reserved
+ *	-ENOENT: the input page is not a reservation
+ */
+int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
+				      uint64_t start)
+{
+	struct amdgpu_vram_reservation *rsv;
+	int ret;
+
+	mutex_lock(&mgr->lock);
+
+	list_for_each_entry(rsv, &mgr->reservations_pending, blocks) {
+		if (rsv->start <= start &&
+		    (start < (rsv->start + rsv->size))) {
+			ret = -EBUSY;
+			goto out;
+		}
+	}
+
+	list_for_each_entry(rsv, &mgr->reserved_pages, blocks) {
+		if (rsv->start <= start &&
+		    (start < (rsv->start + rsv->size))) {
+			ret = 0;
+			goto out;
+		}
+	}
+
+	ret = -ENOENT;
+out:
+	mutex_unlock(&mgr->lock);
+	return ret;
+}
+
+/**
+ * amdgpu_vram_mgr_new - allocate new ranges
+ *
+ * @man: TTM memory type manager
+ * @tbo: TTM BO we need this range for
+ * @place: placement flags and restrictions
+ * @res: the resulting mem object
+ *
+ * Allocate VRAM for the given BO.
+ */
+static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
+			       struct ttm_buffer_object *tbo,
+			       const struct ttm_place *place,
+			       struct ttm_resource **res)
+{
+	u64 vis_usage = 0, max_bytes, cur_size, min_block_size;
+	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
+	struct amdgpu_device *adev = to_amdgpu_device(mgr);
+	struct amdgpu_vram_mgr_resource *vres;
+	u64 size, remaining_size, lpfn, fpfn;
+	struct drm_buddy *mm = &mgr->mm;
+	struct drm_buddy_block *block;
+	unsigned long pages_per_block;
+	int r;
+
+	lpfn = (u64)place->lpfn << PAGE_SHIFT;
+	if (!lpfn)
+		lpfn = man->size;
+
+	fpfn = (u64)place->fpfn << PAGE_SHIFT;
+
+	max_bytes = adev->gmc.mc_vram_size;
+	if (tbo->type != ttm_bo_type_kernel)
+		max_bytes -= AMDGPU_VM_RESERVED_VRAM;
+
+	if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
+		pages_per_block = ~0ul;
+	} else {
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+		pages_per_block = HPAGE_PMD_NR;
+#else
+		/* default to 2MB */
+		pages_per_block = 2UL << (20UL - PAGE_SHIFT);
+#endif
+		pages_per_block = max_t(uint32_t, pages_per_block,
+					tbo->page_alignment);
+	}
+
+	vres = kzalloc(sizeof(*vres), GFP_KERNEL);
+	if (!vres)
+		return -ENOMEM;
+
+	ttm_resource_init(tbo, place, &vres->base);
+
+	/* bail out quickly if there's likely not enough VRAM for this BO */
+	if (ttm_resource_manager_usage(man) > max_bytes) {
+		r = -ENOSPC;
+		goto error_fini;
+	}
+
+	INIT_LIST_HEAD(&vres->blocks);
+
+	if (place->flags & TTM_PL_FLAG_TOPDOWN)
+		vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
+
+	if (fpfn || lpfn != mgr->mm.size)
+		/* Allocate blocks in desired range */
+		vres->flags |= DRM_BUDDY_RANGE_ALLOCATION;
+
+	remaining_size = (u64)vres->base.num_pages << PAGE_SHIFT;
+
+	mutex_lock(&mgr->lock);
+	while (remaining_size) {
+		if (tbo->page_alignment)
+			min_block_size = (u64)tbo->page_alignment << PAGE_SHIFT;
+		else
+			min_block_size = mgr->default_page_size;
+
+		BUG_ON(min_block_size < mm->chunk_size);
+
+		/* Limit maximum size to 2GiB due to SG table limitations */
+		size = min(remaining_size, 2ULL << 30);
+
+		if (size >= (u64)pages_per_block << PAGE_SHIFT)
+			min_block_size = (u64)pages_per_block << PAGE_SHIFT;
+
+		cur_size = size;
+
+		if (fpfn + size != (u64)place->lpfn << PAGE_SHIFT) {
+			/*
+			 * Except for actual range allocation, modify the size and
+			 * min_block_size conforming to continuous flag enablement
+			 */
+			if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
+				size = roundup_pow_of_two(size);
+				min_block_size = size;
+			/*
+			 * Modify the size value if size is not
+			 * aligned with min_block_size
+			 */
+			} else if (!IS_ALIGNED(size, min_block_size)) {
+				size = round_up(size, min_block_size);
+			}
+		}
+
+		r = drm_buddy_alloc_blocks(mm, fpfn,
+					   lpfn,
+					   size,
+					   min_block_size,
+					   &vres->blocks,
+					   vres->flags);
+		if (unlikely(r))
+			goto error_free_blocks;
+
+		if (size > remaining_size)
+			remaining_size = 0;
+		else
+			remaining_size -= size;
+	}
+	mutex_unlock(&mgr->lock);
+
+	if (cur_size != size) {
+		struct drm_buddy_block *block;
+		struct list_head *trim_list;
+		u64 original_size;
+		LIST_HEAD(temp);
+
+		trim_list = &vres->blocks;
+		original_size = (u64)vres->base.num_pages << PAGE_SHIFT;
+
+		/*
+		 * If size value is rounded up to min_block_size, trim the last
+		 * block to the required size
+		 */
+		if (!list_is_singular(&vres->blocks)) {
+			block = list_last_entry(&vres->blocks, typeof(*block), link);
+			list_move_tail(&block->link, &temp);
+			trim_list = &temp;
+			/*
+			 * Compute the original_size value by subtracting the
+			 * last block size with (aligned size - original size)
+			 */
+			original_size = amdgpu_vram_mgr_block_size(block) - (size - cur_size);
+		}
+
+		mutex_lock(&mgr->lock);
+		drm_buddy_block_trim(mm,
+				     original_size,
+				     trim_list);
+		mutex_unlock(&mgr->lock);
+
+		if (!list_empty(&temp))
+			list_splice_tail(trim_list, &vres->blocks);
+	}
+
+	vres->base.start = 0;
+	list_for_each_entry(block, &vres->blocks, link) {
+		unsigned long start;
+
+		start = amdgpu_vram_mgr_block_start(block) +
+			amdgpu_vram_mgr_block_size(block);
+		start >>= PAGE_SHIFT;
+
+		if (start > vres->base.num_pages)
+			start -= vres->base.num_pages;
+		else
+			start = 0;
+		vres->base.start = max(vres->base.start, start);
+
+		vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
+	}
+
+	if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks))
+		vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
+
+	if (adev->gmc.xgmi.connected_to_cpu)
+		vres->base.bus.caching = ttm_cached;
+	else
+		vres->base.bus.caching = ttm_write_combined;
+
+	atomic64_add(vis_usage, &mgr->vis_usage);
+	*res = &vres->base;
+	return 0;
+
+error_free_blocks:
+	drm_buddy_free_list(mm, &vres->blocks);
+	mutex_unlock(&mgr->lock);
+error_fini:
+	ttm_resource_fini(man, &vres->base);
+	kfree(vres);
+
+	return r;
+}
+
+/**
+ * amdgpu_vram_mgr_del - free ranges
+ *
+ * @man: TTM memory type manager
+ * @res: TTM memory object
+ *
+ * Free the allocated VRAM again.
+ */
+static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
+				struct ttm_resource *res)
+{
+	struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
+	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
+	struct amdgpu_device *adev = to_amdgpu_device(mgr);
+	struct drm_buddy *mm = &mgr->mm;
+	struct drm_buddy_block *block;
+	uint64_t vis_usage = 0;
+
+	mutex_lock(&mgr->lock);
+	list_for_each_entry(block, &vres->blocks, link)
+		vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
+
+	amdgpu_vram_mgr_do_reserve(man);
+
+	drm_buddy_free_list(mm, &vres->blocks);
+	mutex_unlock(&mgr->lock);
+
+	atomic64_sub(vis_usage, &mgr->vis_usage);
+
+	ttm_resource_fini(man, res);
+	kfree(vres);
+}
+
+/**
+ * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
+ *
+ * @adev: amdgpu device pointer
+ * @res: TTM memory object
+ * @offset: byte offset from the base of VRAM BO
+ * @length: number of bytes to export in sg_table
+ * @dev: the other device
+ * @dir: dma direction
+ * @sgt: resulting sg table
+ *
+ * Allocate and fill a sg table from a VRAM allocation.
+ */
+int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
+			      struct ttm_resource *res,
+			      u64 offset, u64 length,
+			      struct device *dev,
+			      enum dma_data_direction dir,
+			      struct sg_table **sgt)
+{
+	struct amdgpu_res_cursor cursor;
+	struct scatterlist *sg;
+	int num_entries = 0;
+	int i, r;
+
+	*sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
+	if (!*sgt)
+		return -ENOMEM;
+
+	/* Determine the number of DRM_BUDDY blocks to export */
+	amdgpu_res_first(res, offset, length, &cursor);
+	while (cursor.remaining) {
+		num_entries++;
+		amdgpu_res_next(&cursor, cursor.size);
+	}
+
+	r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
+	if (r)
+		goto error_free;
+
+	/* Initialize scatterlist nodes of sg_table */
+	for_each_sgtable_sg((*sgt), sg, i)
+		sg->length = 0;
+
+	/*
+	 * Walk down DRM_BUDDY blocks to populate scatterlist nodes
+	 * @note: Use iterator api to get first the DRM_BUDDY block
+	 * and the number of bytes from it. Access the following
+	 * DRM_BUDDY block(s) if more buffer needs to exported
+	 */
+	amdgpu_res_first(res, offset, length, &cursor);
+	for_each_sgtable_sg((*sgt), sg, i) {
+		phys_addr_t phys = cursor.start + adev->gmc.aper_base;
+		size_t size = cursor.size;
+		dma_addr_t addr;
+
+		addr = dma_map_resource(dev, phys, size, dir,
+					DMA_ATTR_SKIP_CPU_SYNC);
+		r = dma_mapping_error(dev, addr);
+		if (r)
+			goto error_unmap;
+
+		sg_set_page(sg, NULL, size, 0);
+		sg_dma_address(sg) = addr;
+		sg_dma_len(sg) = size;
+
+		amdgpu_res_next(&cursor, cursor.size);
+	}
+
+	return 0;
+
+error_unmap:
+	for_each_sgtable_sg((*sgt), sg, i) {
+		if (!sg->length)
+			continue;
+
+		dma_unmap_resource(dev, sg->dma_address,
+				   sg->length, dir,
+				   DMA_ATTR_SKIP_CPU_SYNC);
+	}
+	sg_free_table(*sgt);
+
+error_free:
+	kfree(*sgt);
+	return r;
+}
+
+/**
+ * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
+ *
+ * @dev: device pointer
+ * @dir: data direction of resource to unmap
+ * @sgt: sg table to free
+ *
+ * Free a previously allocate sg table.
+ */
+void amdgpu_vram_mgr_free_sgt(struct device *dev,
+			      enum dma_data_direction dir,
+			      struct sg_table *sgt)
+{
+	struct scatterlist *sg;
+	int i;
+
+	for_each_sgtable_sg(sgt, sg, i)
+		dma_unmap_resource(dev, sg->dma_address,
+				   sg->length, dir,
+				   DMA_ATTR_SKIP_CPU_SYNC);
+	sg_free_table(sgt);
+	kfree(sgt);
+}
+
+/**
+ * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
+ *
+ * @mgr: amdgpu_vram_mgr pointer
+ *
+ * Returns how many bytes are used in the visible part of VRAM
+ */
+uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr)
+{
+	return atomic64_read(&mgr->vis_usage);
+}
+
+/**
+ * amdgpu_vram_mgr_intersects - test each drm buddy block for intersection
+ *
+ * @man: TTM memory type manager
+ * @res: The resource to test
+ * @place: The place to test against
+ * @size: Size of the new allocation
+ *
+ * Test each drm buddy block for intersection for eviction decision.
+ */
+static bool amdgpu_vram_mgr_intersects(struct ttm_resource_manager *man,
+				       struct ttm_resource *res,
+				       const struct ttm_place *place,
+				       size_t size)
+{
+	struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
+	struct drm_buddy_block *block;
+
+	/* Check each drm buddy block individually */
+	list_for_each_entry(block, &mgr->blocks, link) {
+		unsigned long fpfn =
+			amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
+		unsigned long lpfn = fpfn +
+			(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
+
+		if (place->fpfn < lpfn &&
+		    (!place->lpfn || place->lpfn > fpfn))
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * amdgpu_vram_mgr_compatible - test each drm buddy block for compatibility
+ *
+ * @man: TTM memory type manager
+ * @res: The resource to test
+ * @place: The place to test against
+ * @size: Size of the new allocation
+ *
+ * Test each drm buddy block for placement compatibility.
+ */
+static bool amdgpu_vram_mgr_compatible(struct ttm_resource_manager *man,
+				       struct ttm_resource *res,
+				       const struct ttm_place *place,
+				       size_t size)
+{
+	struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
+	struct drm_buddy_block *block;
+
+	/* Check each drm buddy block individually */
+	list_for_each_entry(block, &mgr->blocks, link) {
+		unsigned long fpfn =
+			amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
+		unsigned long lpfn = fpfn +
+			(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
+
+		if (fpfn < place->fpfn ||
+		    (place->lpfn && lpfn > place->lpfn))
+			return false;
+	}
+
+	return true;
+}
+
+/**
+ * amdgpu_vram_mgr_debug - dump VRAM table
+ *
+ * @man: TTM memory type manager
+ * @printer: DRM printer to use
+ *
+ * Dump the table content using printk.
+ */
+static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
+				  struct drm_printer *printer)
+{
+	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
+	struct drm_buddy *mm = &mgr->mm;
+	struct amdgpu_vram_reservation *rsv;
+
+	drm_printf(printer, "  vis usage:%llu\n",
+		   amdgpu_vram_mgr_vis_usage(mgr));
+
+	mutex_lock(&mgr->lock);
+	drm_printf(printer, "default_page_size: %lluKiB\n",
+		   mgr->default_page_size >> 10);
+
+	drm_buddy_print(mm, printer);
+
+	drm_printf(printer, "reserved:\n");
+	list_for_each_entry(rsv, &mgr->reserved_pages, blocks)
+		drm_printf(printer, "%#018llx-%#018llx: %llu\n",
+			rsv->start, rsv->start + rsv->size, rsv->size);
+	mutex_unlock(&mgr->lock);
+}
+
+static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
+	.alloc	= amdgpu_vram_mgr_new,
+	.free	= amdgpu_vram_mgr_del,
+	.intersects = amdgpu_vram_mgr_intersects,
+	.compatible = amdgpu_vram_mgr_compatible,
+	.debug	= amdgpu_vram_mgr_debug
+};
+
+/**
+ * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Allocate and initialize the VRAM manager.
+ */
+int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
+{
+	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
+	struct ttm_resource_manager *man = &mgr->manager;
+	int err;
+
+	ttm_resource_manager_init(man, &adev->mman.bdev,
+				  adev->gmc.real_vram_size);
+
+	man->func = &amdgpu_vram_mgr_func;
+
+	err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
+	if (err)
+		return err;
+
+	mutex_init(&mgr->lock);
+	INIT_LIST_HEAD(&mgr->reservations_pending);
+	INIT_LIST_HEAD(&mgr->reserved_pages);
+	mgr->default_page_size = PAGE_SIZE;
+
+	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
+	ttm_resource_manager_set_used(man, true);
+	return 0;
+}
+
+/**
+ * amdgpu_vram_mgr_fini - free and destroy VRAM manager
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
+ * allocated inside it.
+ */
+void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
+{
+	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
+	struct ttm_resource_manager *man = &mgr->manager;
+	int ret;
+	struct amdgpu_vram_reservation *rsv, *temp;
+
+	ttm_resource_manager_set_used(man, false);
+
+	ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
+	if (ret)
+		return;
+
+	mutex_lock(&mgr->lock);
+	list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks)
+		kfree(rsv);
+
+	list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) {
+		drm_buddy_free_list(&mgr->mm, &rsv->allocated);
+		kfree(rsv);
+	}
+	drm_buddy_fini(&mgr->mm);
+	mutex_unlock(&mgr->lock);
+
+	ttm_resource_manager_cleanup(man);
+	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
+}