diff options
author | Ben Skeggs <bskeggs@redhat.com> | 2022-06-01 13:46:36 +0300 |
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committer | Ben Skeggs <bskeggs@redhat.com> | 2022-11-09 03:43:10 +0300 |
commit | a2b7eadfef5963138a5aeaba90c4f513414823c2 (patch) | |
tree | b11d8ba92e7da8de21317266e9dcb53b6b11c74c /drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c | |
parent | 8c7d980da9ba3eb67a1b40fd4b33bcf49397084b (diff) | |
download | linux-a2b7eadfef5963138a5aeaba90c4f513414823c2.tar.xz |
drm/nouveau/disp: add head class
v2: remove extra whitespace
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c new file mode 100644 index 000000000000..a58f4b5fcd01 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c @@ -0,0 +1,66 @@ +/* + * Copyright 2021 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. + */ +#define nvkm_uhead(p) container_of((p), struct nvkm_head, object) +#include "head.h" + +#include <nvif/if0013.h> + +static void * +nvkm_uhead_dtor(struct nvkm_object *object) +{ + struct nvkm_head *head = nvkm_uhead(object); + struct nvkm_disp *disp = head->disp; + + spin_lock(&disp->client.lock); + head->object.func = NULL; + spin_unlock(&disp->client.lock); + return NULL; +} + +static const struct nvkm_object_func +nvkm_uhead = { + .dtor = nvkm_uhead_dtor, +}; + +int +nvkm_uhead_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject) +{ + struct nvkm_disp *disp = nvkm_udisp(oclass->parent); + struct nvkm_head *head; + union nvif_head_args *args = argv; + int ret; + + if (argc != sizeof(args->v0) || args->v0.version != 0) + return -ENOSYS; + if (!(head = nvkm_head_find(disp, args->v0.id))) + return -EINVAL; + + ret = -EBUSY; + spin_lock(&disp->client.lock); + if (!head->object.func) { + nvkm_object_ctor(&nvkm_uhead, oclass, &head->object); + *pobject = &head->object; + ret = 0; + } + spin_unlock(&disp->client.lock); + return ret; +} |