path: root/drivers/gpu/drm/nouveau/nouveau_bo.c

/*
 * Copyright 2007 Dave Airlied
 * All Rights Reserved.
 *
 * 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 (including the next
 * paragraph) 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
 * VA LINUX SYSTEMS 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.
 */
/*
 * Authors: Dave Airlied <airlied@linux.ie>
 *	    Ben Skeggs   <darktama@iinet.net.au>
 *	    Jeremy Kolb  <jkolb@brandeis.edu>
 */

#include "drmP.h"

#include "nouveau_drm.h"
#include "nouveau_drv.h"
#include "nouveau_dma.h"

#include <linux/log2.h>
#include <linux/slab.h>

static void
nouveau_bo_del_ttm(struct ttm_buffer_object *bo)
{
	struct drm_nouveau_private *dev_priv = nouveau_bdev(bo->bdev);
	struct drm_device *dev = dev_priv->dev;
	struct nouveau_bo *nvbo = nouveau_bo(bo);

	if (unlikely(nvbo->gem))
		DRM_ERROR("bo %p still attached to GEM object\n", bo);

	if (nvbo->tile)
		nv10_mem_expire_tiling(dev, nvbo->tile, NULL);

	kfree(nvbo);
}

static void
nouveau_bo_fixup_align(struct drm_device *dev,
		       uint32_t tile_mode, uint32_t tile_flags,
		       int *align, int *size)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;

	/*
	 * Some of the tile_flags have a periodic structure of N*4096 bytes,
	 * align to to that as well as the page size. Align the size to the
	 * appropriate boundaries. This does imply that sizes are rounded up
	 * 3-7 pages, so be aware of this and do not waste memory by allocating
	 * many small buffers.
	 */
	if (dev_priv->card_type == NV_50) {
		uint32_t block_size = dev_priv->vram_size >> 15;
		int i;

		switch (tile_flags) {
		case 0x1800:
		case 0x2800:
		case 0x4800:
		case 0x7a00:
			if (is_power_of_2(block_size)) {
				for (i = 1; i < 10; i++) {
					*align = 12 * i * block_size;
					if (!(*align % 65536))
						break;
				}
			} else {
				for (i = 1; i < 10; i++) {
					*align = 8 * i * block_size;
					if (!(*align % 65536))
						break;
				}
			}
			*size = roundup(*size, *align);
			break;
		default:
			break;
		}

	} else {
		if (tile_mode) {
			if (dev_priv->chipset >= 0x40) {
				*align = 65536;
				*size = roundup(*size, 64 * tile_mode);

			} else if (dev_priv->chipset >= 0x30) {
				*align = 32768;
				*size = roundup(*size, 64 * tile_mode);

			} else if (dev_priv->chipset >= 0x20) {
				*align = 16384;
				*size = roundup(*size, 64 * tile_mode);

			} else if (dev_priv->chipset >= 0x10) {
				*align = 16384;
				*size = roundup(*size, 32 * tile_mode);
			}
		}
	}

	/* ALIGN works only on powers of two. */
	*size = roundup(*size, PAGE_SIZE);

	if (dev_priv->card_type == NV_50) {
		*size = roundup(*size, 65536);
		*align = max(65536, *align);
	}
}

int
nouveau_bo_new(struct drm_device *dev, struct nouveau_channel *chan,
	       int size, int align, uint32_t flags, uint32_t tile_mode,
	       uint32_t tile_flags, bool no_vm, bool mappable,
	       struct nouveau_bo **pnvbo)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_bo *nvbo;
	int ret = 0;

	nvbo = kzalloc(sizeof(struct nouveau_bo), GFP_KERNEL);
	if (!nvbo)
		return -ENOMEM;
	INIT_LIST_HEAD(&nvbo->head);
	INIT_LIST_HEAD(&nvbo->entry);
	nvbo->mappable = mappable;
	nvbo->no_vm = no_vm;
	nvbo->tile_mode = tile_mode;
	nvbo->tile_flags