diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/ltc/base.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/ltc/base.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltc/base.c b/drivers/gpu/drm/nouveau/core/subdev/ltc/base.c new file mode 100644 index 0000000..c99bf3f --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/ltc/base.c @@ -0,0 +1,80 @@ +/* + * Copyright 2014 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs <bskeggs@redhat.com> + */ + +#include "priv.h" + +static int +nvkm_ltc_tags_alloc(struct nouveau_ltc *ltc, u32 n, + struct nouveau_mm_node **pnode) +{ + struct nvkm_ltc_priv *priv = (void *)ltc; + int ret; + + ret = nouveau_mm_head(&priv->tags, 1, n, n, 1, pnode); + if (ret) + *pnode = NULL; + + return ret; +} + +static void +nvkm_ltc_tags_free(struct nouveau_ltc *ltc, struct nouveau_mm_node **pnode) +{ + struct nvkm_ltc_priv *priv = (void *)ltc; + nouveau_mm_free(&priv->tags, pnode); +} + +static void +nvkm_ltc_tags_clear(struct nouveau_ltc *ltc, u32 first, u32 count) +{ + const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc); + struct nvkm_ltc_priv *priv = (void *)ltc; + const u32 limit = first + count - 1; + + BUG_ON((first > limit) || (limit >= priv->num_tags)); + + impl->cbc_clear(priv, first, limit); + impl->cbc_wait(priv); +} + +int +nvkm_ltc_create_(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, int length, void **pobject) +{ + const struct nvkm_ltc_impl *impl = (void *)oclass; + struct nvkm_ltc_priv *priv; + int ret; + + ret = nouveau_subdev_create_(parent, engine, oclass, 0, "PLTCG", + "l2c", length, pobject); + priv = *pobject; + if (ret) + return ret; + + priv->base.base.intr = impl->intr; + priv->base.tags_alloc = nvkm_ltc_tags_alloc; + priv->base.tags_free = nvkm_ltc_tags_free; + priv->base.tags_clear = nvkm_ltc_tags_clear; + return 0; +} |