From: Ben Skeggs Date: Fri, 24 Jun 2011 02:47:46 +0000 (+1000) Subject: drm/nvc0/vram: support non-uniform memory size per controller X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=aa6500964c0e5c08e453439a95431ec34b548427;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/nvc0/vram: support non-uniform memory size per controller Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/nvc0_vram.c b/drivers/gpu/drm/nouveau/nvc0_vram.c index abed0d3d5792..edbfe9360ae2 100644 --- a/drivers/gpu/drm/nouveau/nvc0_vram.c +++ b/drivers/gpu/drm/nouveau/nvc0_vram.c @@ -106,12 +106,50 @@ nvc0_vram_init(struct drm_device *dev) struct nouveau_vram_engine *vram = &dev_priv->engine.vram; const u32 rsvd_head = ( 256 * 1024) >> 12; /* vga memory */ const u32 rsvd_tail = (1024 * 1024) >> 12; /* vbios etc */ - u32 length; + u32 parts = nv_rd32(dev, 0x121c74); + u32 bsize = nv_rd32(dev, 0x10f20c); + u32 offset, length; + bool uniform = true; + int ret, i; - dev_priv->vram_size = nv_rd32(dev, 0x10f20c) << 20; - dev_priv->vram_size *= nv_rd32(dev, 0x121c74); + NV_DEBUG(dev, "0x100800: 0x%08x\n", nv_rd32(dev, 0x100800)); + NV_DEBUG(dev, "parts 0x%08x bcast_mem_amount 0x%08x\n", parts, bsize); - length = (dev_priv->vram_size >> 12) - rsvd_head - rsvd_tail; + /* read amount of vram attached to each memory controller */ + for (i = 0; i < parts; i++) { + u32 psize = nv_rd32(dev, 0x11020c + (i * 0x1000)); + if (psize != bsize) { + if (psize < bsize) + bsize = psize; + uniform = false; + } + + NV_DEBUG(dev, "%d: mem_amount 0x%08x\n", i, psize); + + dev_priv->vram_size += (u64)psize << 20; + } + + /* if all controllers have the same amount attached, there's no holes */ + if (uniform) { + offset = rsvd_head; + length = (dev_priv->vram_size >> 12) - rsvd_head - rsvd_tail; + return nouveau_mm_init(&vram->mm, offset, length, 1); + } - return nouveau_mm_init(&vram->mm, rsvd_head, length, 1); + /* otherwise, address lowest common amount from 0GiB */ + ret = nouveau_mm_init(&vram->mm, rsvd_head, (bsize << 8) * parts, 1); + if (ret) + return ret; + + /* and the rest starting from (8GiB + common_size) */ + offset = (0x0200000000ULL >> 12) + (bsize << 8); + length = (dev_priv->vram_size >> 12) - (bsize << 8) - rsvd_tail; + + ret = nouveau_mm_init(&vram->mm, offset, length, 0); + if (ret) { + nouveau_mm_fini(&vram->mm); + return ret; + } + + return 0; }