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/drivers/gpu/drm/nouveau/nv10_fb.c

https://bitbucket.org/ndreys/linux-sunxi
C | 144 lines | 110 code | 26 blank | 8 comment | 20 complexity | eb136a2b4bc02ce49706cbeba8391b9c MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1#include "drmP.h"
  2#include "drm.h"
  3#include "nouveau_drv.h"
  4#include "nouveau_drm.h"
  5
  6static struct drm_mm_node *
  7nv20_fb_alloc_tag(struct drm_device *dev, uint32_t size)
  8{
  9	struct drm_nouveau_private *dev_priv = dev->dev_private;
 10	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
 11	struct drm_mm_node *mem;
 12	int ret;
 13
 14	ret = drm_mm_pre_get(&pfb->tag_heap);
 15	if (ret)
 16		return NULL;
 17
 18	spin_lock(&dev_priv->tile.lock);
 19	mem = drm_mm_search_free(&pfb->tag_heap, size, 0, 0);
 20	if (mem)
 21		mem = drm_mm_get_block_atomic(mem, size, 0);
 22	spin_unlock(&dev_priv->tile.lock);
 23
 24	return mem;
 25}
 26
 27static void
 28nv20_fb_free_tag(struct drm_device *dev, struct drm_mm_node *mem)
 29{
 30	struct drm_nouveau_private *dev_priv = dev->dev_private;
 31
 32	spin_lock(&dev_priv->tile.lock);
 33	drm_mm_put_block(mem);
 34	spin_unlock(&dev_priv->tile.lock);
 35}
 36
 37void
 38nv10_fb_init_tile_region(struct drm_device *dev, int i, uint32_t addr,
 39			 uint32_t size, uint32_t pitch, uint32_t flags)
 40{
 41	struct drm_nouveau_private *dev_priv = dev->dev_private;
 42	struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
 43	int bpp = (flags & NOUVEAU_GEM_TILE_32BPP ? 32 : 16);
 44
 45	tile->addr = addr;
 46	tile->limit = max(1u, addr + size) - 1;
 47	tile->pitch = pitch;
 48
 49	if (dev_priv->card_type == NV_20) {
 50		if (flags & NOUVEAU_GEM_TILE_ZETA) {
 51			/*
 52			 * Allocate some of the on-die tag memory,
 53			 * used to store Z compression meta-data (most
 54			 * likely just a bitmap determining if a given
 55			 * tile is compressed or not).
 56			 */
 57			tile->tag_mem = nv20_fb_alloc_tag(dev, size / 256);
 58
 59			if (tile->tag_mem) {
 60				/* Enable Z compression */
 61				if (dev_priv->chipset >= 0x25)
 62					tile->zcomp = tile->tag_mem->start |
 63						(bpp == 16 ?
 64						 NV25_PFB_ZCOMP_MODE_16 :
 65						 NV25_PFB_ZCOMP_MODE_32);
 66				else
 67					tile->zcomp = tile->tag_mem->start |
 68						NV20_PFB_ZCOMP_EN |
 69						(bpp == 16 ? 0 :
 70						 NV20_PFB_ZCOMP_MODE_32);
 71			}
 72
 73			tile->addr |= 3;
 74		} else {
 75			tile->addr |= 1;
 76		}
 77
 78	} else {
 79		tile->addr |= 1 << 31;
 80	}
 81}
 82
 83void
 84nv10_fb_free_tile_region(struct drm_device *dev, int i)
 85{
 86	struct drm_nouveau_private *dev_priv = dev->dev_private;
 87	struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
 88
 89	if (tile->tag_mem) {
 90		nv20_fb_free_tag(dev, tile->tag_mem);
 91		tile->tag_mem = NULL;
 92	}
 93
 94	tile->addr = tile->limit = tile->pitch = tile->zcomp = 0;
 95}
 96
 97void
 98nv10_fb_set_tile_region(struct drm_device *dev, int i)
 99{
100	struct drm_nouveau_private *dev_priv = dev->dev_private;
101	struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
102
103	nv_wr32(dev, NV10_PFB_TLIMIT(i), tile->limit);
104	nv_wr32(dev, NV10_PFB_TSIZE(i), tile->pitch);
105	nv_wr32(dev, NV10_PFB_TILE(i), tile->addr);
106
107	if (dev_priv->card_type == NV_20)
108		nv_wr32(dev, NV20_PFB_ZCOMP(i), tile->zcomp);
109}
110
111int
112nv10_fb_init(struct drm_device *dev)
113{
114	struct drm_nouveau_private *dev_priv = dev->dev_private;
115	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
116	int i;
117
118	pfb->num_tiles = NV10_PFB_TILE__SIZE;
119
120	if (dev_priv->card_type == NV_20)
121		drm_mm_init(&pfb->tag_heap, 0,
122			    (dev_priv->chipset >= 0x25 ?
123			     64 * 1024 : 32 * 1024));
124
125	/* Turn all the tiling regions off. */
126	for (i = 0; i < pfb->num_tiles; i++)
127		pfb->set_tile_region(dev, i);
128
129	return 0;
130}
131
132void
133nv10_fb_takedown(struct drm_device *dev)
134{
135	struct drm_nouveau_private *dev_priv = dev->dev_private;
136	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
137	int i;
138
139	for (i = 0; i < pfb->num_tiles; i++)
140		pfb->free_tile_region(dev, i);
141
142	if (dev_priv->card_type == NV_20)
143		drm_mm_takedown(&pfb->tag_heap);
144}