1/*
  2 * Copyright 2010 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Ben Skeggs
 23 */
 24
 25#include "drmP.h"
 26#include "nouveau_drv.h"
 27#include "nouveau_mm.h"
 28
 29/* 0 = unsupported
 30 * 1 = non-compressed
 31 * 3 = compressed
 32 */
 33static const u8 types[256] = {
 34	1, 1, 3, 3, 3, 3, 0, 3, 3, 3, 3, 0, 0, 0, 0, 0,
 35	0, 1, 0, 0, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0, 0,
 36	0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
 37	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 3, 3,
 38	3, 3, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 39	0, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 40	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 41	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
 42	0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 0, 1, 1, 1, 1, 0,
 43	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 44	0, 0, 0, 3, 3, 3, 3, 1, 1, 1, 1, 0, 0, 0, 0, 0,
 45	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3,
 46	3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3,
 47	3, 3, 0, 0, 0, 0, 0, 0, 3, 0, 0, 3, 0, 3, 0, 3,
 48	3, 0, 3, 3, 3, 3, 3, 0, 0, 3, 0, 3, 0, 3, 3, 0,
 49	3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 1, 1, 0
 50};
 51
 52bool
 53nvc0_vram_flags_valid(struct drm_device *dev, u32 tile_flags)
 54{
 55	u8 memtype = (tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK) >> 8;
 56	return likely((types[memtype] == 1));
 57}
 58
 59int
 60nvc0_vram_new(struct drm_device *dev, u64 size, u32 align, u32 ncmin,
 61	      u32 type, struct nouveau_mem **pmem)
 62{
 63	struct drm_nouveau_private *dev_priv = dev->dev_private;
 64	struct nouveau_mm *mm = dev_priv->engine.vram.mm;
 65	struct nouveau_mm_node *r;
 66	struct nouveau_mem *mem;
 67	int ret;
 68
 69	size  >>= 12;
 70	align >>= 12;
 71	ncmin >>= 12;
 72
 73	mem = kzalloc(sizeof(*mem), GFP_KERNEL);
 74	if (!mem)
 75		return -ENOMEM;
 76
 77	INIT_LIST_HEAD(&mem->regions);
 78	mem->dev = dev_priv->dev;
 79	mem->memtype = (type & 0xff);
 80	mem->size = size;
 81
 82	mutex_lock(&mm->mutex);
 83	do {
 84		ret = nouveau_mm_get(mm, 1, size, ncmin, align, &r);
 85		if (ret) {
 86			mutex_unlock(&mm->mutex);
 87			nv50_vram_del(dev, &mem);
 88			return ret;
 89		}
 90
 91		list_add_tail(&r->rl_entry, &mem->regions);
 92		size -= r->length;
 93	} while (size);
 94	mutex_unlock(&mm->mutex);
 95
 96	r = list_first_entry(&mem->regions, struct nouveau_mm_node, rl_entry);
 97	mem->offset = (u64)r->offset << 12;
 98	*pmem = mem;
 99	return 0;
100}
101
102int
103nvc0_vram_init(struct drm_device *dev)
104{
105	struct drm_nouveau_private *dev_priv = dev->dev_private;
106	struct nouveau_vram_engine *vram = &dev_priv->engine.vram;
107	const u32 rsvd_head = ( 256 * 1024) >> 12; /* vga memory */
108	const u32 rsvd_tail = (1024 * 1024) >> 12; /* vbios etc */
109	u32 length;
110
111	dev_priv->vram_size  = nv_rd32(dev, 0x10f20c) << 20;
112	dev_priv->vram_size *= nv_rd32(dev, 0x121c74);
113
114	length = (dev_priv->vram_size >> 12) - rsvd_head - rsvd_tail;
115
116	return nouveau_mm_init(&vram->mm, rsvd_head, length, 1);
117}