diff options
author | Alexandre Courbot <acourbot@nvidia.com> | 2015-02-20 18:22:59 +0900 |
---|---|---|
committer | Ben Skeggs <bskeggs@redhat.com> | 2015-04-14 17:00:42 +1000 |
commit | eaecf0326f096faaba462eae48a3b30bcb1f7009 (patch) | |
tree | da4d31cc0d0a867786e2cca541d6a89a1541c921 /drivers | |
parent | c6a7b026a3a80662d8f7bb6b4f7821329aa7111b (diff) | |
download | linux-eaecf0326f096faaba462eae48a3b30bcb1f7009.tar.bz2 |
make RAM device optional
Having a RAM device does not make sense for chips like GK20A which have
no dedicated video memory. The dummy RAM device that we used so far
works as a temporary band-aid, but in the longer term it is desirable
for the driver to be able to work without any kind of VRAM.
This patch adds a few conditionals in places where a RAM device was
assumed to be present and allows some more objects to be allocated from
the TT domain, allowing Nouveau to handle GPUs for which
pfb->ram == NULL.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_display.c | 9 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_ttm.c | 3 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nv84_fence.c | 14 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/device/base.c | 10 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 2 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c | 26 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c | 10 |
7 files changed, 57 insertions, 17 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index 860b0e2d4181..8670d90cdc11 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -869,13 +869,20 @@ nouveau_display_dumb_create(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_create_dumb *args) { struct nouveau_bo *bo; + uint32_t domain; int ret; args->pitch = roundup(args->width * (args->bpp / 8), 256); args->size = args->pitch * args->height; args->size = roundup(args->size, PAGE_SIZE); - ret = nouveau_gem_new(dev, args->size, 0, NOUVEAU_GEM_DOMAIN_VRAM, 0, 0, &bo); + /* Use VRAM if there is any ; otherwise fallback to system memory */ + if (nouveau_drm(dev)->device.info.ram_size != 0) + domain = NOUVEAU_GEM_DOMAIN_VRAM; + else + domain = NOUVEAU_GEM_DOMAIN_GART; + + ret = nouveau_gem_new(dev, args->size, 0, domain, 0, 0, &bo); if (ret) return ret; diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c index 273e50110ec3..18f449715788 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -82,6 +82,9 @@ nouveau_vram_manager_new(struct ttm_mem_type_manager *man, u32 size_nc = 0; int ret; + if (drm->device.info.ram_size == 0) + return -ENOMEM; + if (nvbo->tile_flags & NOUVEAU_GEM_TILE_NONCONTIG) size_nc = 1 << nvbo->page_shift; diff --git a/drivers/gpu/drm/nouveau/nv84_fence.c b/drivers/gpu/drm/nouveau/nv84_fence.c index bf429cabbaa8..a03db4368696 100644 --- a/drivers/gpu/drm/nouveau/nv84_fence.c +++ b/drivers/gpu/drm/nouveau/nv84_fence.c @@ -215,6 +215,7 @@ nv84_fence_create(struct nouveau_drm *drm) { struct nvkm_fifo *pfifo = nvxx_fifo(&drm->device); struct nv84_fence_priv *priv; + u32 domain; int ret; priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); @@ -231,10 +232,17 @@ nv84_fence_create(struct nouveau_drm *drm) priv->base.context_base = fence_context_alloc(priv->base.contexts); priv->base.uevent = true; - ret = nouveau_bo_new(drm->dev, 16 * priv->base.contexts, 0, - TTM_PL_FLAG_VRAM, 0, 0, NULL, NULL, &priv->bo); + /* Use VRAM if there is any ; otherwise fallback to system memory */ + domain = drm->device.info.ram_size != 0 ? TTM_PL_FLAG_VRAM : + /* + * fences created in sysmem must be non-cached or we + * will lose CPU/GPU coherency! + */ + TTM_PL_FLAG_TT | TTM_PL_FLAG_UNCACHED; + ret = nouveau_bo_new(drm->dev, 16 * priv->base.contexts, 0, domain, 0, + 0, NULL, NULL, &priv->bo); if (ret == 0) { - ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false); + ret = nouveau_bo_pin(priv->bo, domain, false); if (ret == 0) { ret = nouveau_bo_map(priv->bo); if (ret) diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c index 6efa8f38ff54..63d8e52f4b22 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c @@ -139,9 +139,13 @@ nvkm_devobj_info(struct nvkm_object *object, void *data, u32 size) args->v0.chipset = device->chipset; args->v0.revision = device->chiprev; - if (pfb) args->v0.ram_size = args->v0.ram_user = pfb->ram->size; - else args->v0.ram_size = args->v0.ram_user = 0; - if (imem) args->v0.ram_user = args->v0.ram_user - imem->reserved; + if (pfb && pfb->ram) + args->v0.ram_size = args->v0.ram_user = pfb->ram->size; + else + args->v0.ram_size = args->v0.ram_user = 0; + if (imem && args->v0.ram_size > 0) + args->v0.ram_user = args->v0.ram_user - imem->reserved; + return 0; } diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c index b24a9cc04b73..39a83d82e0cd 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c @@ -184,7 +184,7 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei) nv_debug(clk, "setting performance state %d\n", pstatei); clk->pstate = pstatei; - if (pfb->ram->calc) { + if (pfb->ram && pfb->ram->calc) { int khz = pstate->base.domain[nv_clk_src_mem]; do { ret = pfb->ram->calc(pfb, khz); diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c index 16589fa613cd..61fde43dab71 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c @@ -55,9 +55,11 @@ _nvkm_fb_fini(struct nvkm_object *object, bool suspend) struct nvkm_fb *pfb = (void *)object; int ret; - ret = nv_ofuncs(pfb->ram)->fini(nv_object(pfb->ram), suspend); - if (ret && suspend) - return ret; + if (pfb->ram) { + ret = nv_ofuncs(pfb->ram)->fini(nv_object(pfb->ram), suspend); + if (ret && suspend) + return ret; + } return nvkm_subdev_fini(&pfb->base, suspend); } @@ -72,9 +74,11 @@ _nvkm_fb_init(struct nvkm_object *object) if (ret) return ret; - ret = nv_ofuncs(pfb->ram)->init(nv_object(pfb->ram)); - if (ret) - return ret; + if (pfb->ram) { + ret = nv_ofuncs(pfb->ram)->init(nv_object(pfb->ram)); + if (ret) + return ret; + } for (i = 0; i < pfb->tile.regions; i++) pfb->tile.prog(pfb, i, &pfb->tile.region[i]); @@ -91,9 +95,12 @@ _nvkm_fb_dtor(struct nvkm_object *object) for (i = 0; i < pfb->tile.regions; i++) pfb->tile.fini(pfb, i, &pfb->tile.region[i]); nvkm_mm_fini(&pfb->tags); - nvkm_mm_fini(&pfb->vram); - nvkm_object_ref(NULL, (struct nvkm_object **)&pfb->ram); + if (pfb->ram) { + nvkm_mm_fini(&pfb->vram); + nvkm_object_ref(NULL, (struct nvkm_object **)&pfb->ram); + } + nvkm_subdev_destroy(&pfb->base); } @@ -127,6 +134,9 @@ nvkm_fb_create_(struct nvkm_object *parent, struct nvkm_object *engine, pfb->memtype_valid = impl->memtype; + if (!impl->ram) + return 0; + ret = nvkm_object_ctor(nv_object(pfb), NULL, impl->ram, NULL, 0, &ram); if (ret) { nv_fatal(pfb, "error detecting memory configuration!!\n"); diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c index 8e7cc6200d60..7fb5ea0314cb 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c @@ -136,7 +136,8 @@ gf100_ltc_dtor(struct nvkm_object *object) struct nvkm_ltc_priv *priv = (void *)object; nvkm_mm_fini(&priv->tags); - nvkm_mm_free(&pfb->vram, &priv->tag_ram); + if (pfb->ram) + nvkm_mm_free(&pfb->vram, &priv->tag_ram); nvkm_ltc_destroy(priv); } @@ -149,6 +150,12 @@ gf100_ltc_init_tag_ram(struct nvkm_fb *pfb, struct nvkm_ltc_priv *priv) u32 tag_size, tag_margin, tag_align; int ret; + /* No VRAM, no tags for now. */ + if (!pfb->ram) { + priv->num_tags = 0; + goto mm_init; + } + /* tags for 1/4 of VRAM should be enough (8192/4 per GiB of VRAM) */ priv->num_tags = (pfb->ram->size >> 17) / 4; if (priv->num_tags > (1 << 17)) @@ -183,6 +190,7 @@ gf100_ltc_init_tag_ram(struct nvkm_fb *pfb, struct nvkm_ltc_priv *priv) priv->tag_base = tag_base; } +mm_init: ret = nvkm_mm_init(&priv->tags, 0, priv->num_tags, 1); return ret; } |