drm/nv50: calculate vram reordering block size
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>
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index f34c532..6eeaeac 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -308,7 +308,61 @@
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 @@
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;