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drm/nv50: calculate vram reordering block size

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Will be used at a later point when we plug in an alternative VRAM memory
manager for GeForce 8+ boards.

Based on pscnv code to do the same.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-08-12 12:37:28 +10:00
parent 5125bfd886
commit 6c3d7ef25e
2 changed files with 66 additions and 2 deletions
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1
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -579,6 +579,7 @@ struct drm_nouveau_private {
/* VRAM/fb configuration */
uint64_t vram_size;
uint64_t vram_sys_base;
u32 vram_rblock_size;
uint64_t fb_phys;
uint64_t fb_available_size;

67
drivers/gpu/drm/nouveau/nouveau_mem.c
View File

@ -308,7 +308,61 @@ nouveau_mem_detect_nforce(struct drm_device *dev)
return 0;
}
/* returns the amount of FB ram in bytes */
static void
nv50_vram_preinit(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
int i, parts, colbits, rowbitsa, rowbitsb, banks;
u64 rowsize, predicted;
u32 r0, r4, rt, ru;
r0 = nv_rd32(dev, 0x100200);
r4 = nv_rd32(dev, 0x100204);
rt = nv_rd32(dev, 0x100250);
ru = nv_rd32(dev, 0x001540);
NV_DEBUG(dev, "memcfg 0x%08x 0x%08x 0x%08x 0x%08x\n", r0, r4, rt, ru);
for (i = 0, parts = 0; i < 8; i++) {
if (ru & (0x00010000 << i))
parts++;
}
colbits = (r4 & 0x0000f000) >> 12;
rowbitsa = ((r4 & 0x000f0000) >> 16) + 8;
rowbitsb = ((r4 & 0x00f00000) >> 20) + 8;
banks = ((r4 & 0x01000000) ? 8 : 4);
rowsize = parts * banks * (1 << colbits) * 8;
predicted = rowsize << rowbitsa;
if (r0 & 0x00000004)
predicted += rowsize << rowbitsb;
if (predicted != dev_priv->vram_size) {
NV_WARN(dev, "memory controller reports %dMiB VRAM\n",
(u32)(dev_priv->vram_size >> 20));
NV_WARN(dev, "we calculated %dMiB VRAM\n",
(u32)(predicted >> 20));
}
dev_priv->vram_rblock_size = rowsize >> 12;
if (rt & 1)
dev_priv->vram_rblock_size *= 3;
NV_DEBUG(dev, "rblock %lld bytes\n",
(u64)dev_priv->vram_rblock_size << 12);
}
static void
nvaa_vram_preinit(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
/* To our knowledge, there's no large scale reordering of pages
* that occurs on IGP chipsets.
*/
dev_priv->vram_rblock_size = 1;
}
int
nouveau_mem_detect(struct drm_device *dev)
{
@ -328,9 +382,18 @@ nouveau_mem_detect(struct drm_device *dev)
dev_priv->vram_size = nv_rd32(dev, NV04_PFB_FIFO_DATA);
dev_priv->vram_size |= (dev_priv->vram_size & 0xff) << 32;
dev_priv->vram_size &= 0xffffffff00ll;
if (dev_priv->chipset == 0xaa || dev_priv->chipset == 0xac) {
switch (dev_priv->chipset) {
case 0xaa:
case 0xac:
case 0xaf:
dev_priv->vram_sys_base = nv_rd32(dev, 0x100e10);
dev_priv->vram_sys_base <<= 12;
nvaa_vram_preinit(dev);
break;
default:
nv50_vram_preinit(dev);
break;
}
} else {
dev_priv->vram_size = nv_rd32(dev, 0x10f20c) << 20;