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author | Ben Skeggs <bskeggs@redhat.com> | 2014-08-09 22:10:21 +0400 |
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committer | Ben Skeggs <bskeggs@redhat.com> | 2014-08-09 23:13:09 +0400 |
commit | a04d04231b490a2dca427a0f04603ed47fdb9cee (patch) | |
tree | e2603db4b8eb2cab4251fd3caf9e470029243f25 /drivers/gpu/drm/nouveau/nvif/object.c | |
parent | 803c1787efd379110963db360fbe06ed0b41197e (diff) | |
download | linux-a04d04231b490a2dca427a0f04603ed47fdb9cee.tar.xz |
drm/nouveau/nvif: import library functions for the ioctl/event interfaces
This is a wrapper around the interfaces defined in an earlier commit,
and is also used by various userspace (either by a libdrm backend, or
libpciaccess) tools/tests.
In the future this will be extended to handle channels, replacing some
long-unloved code we currently use, and allow fifo/display/mpeg (hi
Ilia ;)) engines to all be exposed in the same way.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvif/object.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvif/object.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvif/object.c b/drivers/gpu/drm/nouveau/nvif/object.c new file mode 100644 index 000000000000..b0c82206ece2 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/object.c @@ -0,0 +1,302 @@ +/* + * 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 "object.h" +#include "client.h" +#include "driver.h" +#include "ioctl.h" + +int +nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack) +{ + struct nvif_client *client = nvif_client(object); + union { + struct nvif_ioctl_v0 v0; + } *args = data; + + if (size >= sizeof(*args) && args->v0.version == 0) { + args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY; + args->v0.path_nr = 0; + while (args->v0.path_nr < ARRAY_SIZE(args->v0.path)) { + args->v0.path[args->v0.path_nr++] = object->handle; + if (object->parent == object) + break; + object = object->parent; + } + } else + return -ENOSYS; + + return client->driver->ioctl(client->base.priv, client->super, data, size, hack); +} + +int +nvif_object_sclass(struct nvif_object *object, u32 *oclass, int count) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_sclass_v0 sclass; + } *args; + u32 size = count * sizeof(args->sclass.oclass[0]); + int ret; + + if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) + return -ENOMEM; + args->ioctl.version = 0; + args->ioctl.type = NVIF_IOCTL_V0_SCLASS; + args->sclass.version = 0; + args->sclass.count = count; + + memcpy(args->sclass.oclass, oclass, size); + ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL); + ret = ret ? ret : args->sclass.count; + memcpy(oclass, args->sclass.oclass, size); + kfree(args); + return ret; +} + +u32 +nvif_object_rd(struct nvif_object *object, int size, u64 addr) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_rd_v0 rd; + } args = { + .ioctl.type = NVIF_IOCTL_V0_RD, + .rd.size = size, + .rd.addr = addr, + }; + int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret) { + /*XXX: warn? */ + return 0; + } + return args.rd.data; +} + +void +nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_wr_v0 wr; + } args = { + .ioctl.type = NVIF_IOCTL_V0_WR, + .wr.size = size, + .wr.addr = addr, + .wr.data = data, + }; + int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret) { + /*XXX: warn? */ + } +} + +int +nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_mthd_v0 mthd; + } *args; + u8 stack[128]; + int ret; + + if (sizeof(*args) + size > sizeof(stack)) { + if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) + return -ENOMEM; + } else { + args = (void *)stack; + } + args->ioctl.version = 0; + args->ioctl.type = NVIF_IOCTL_V0_MTHD; + args->mthd.version = 0; + args->mthd.method = mthd; + + memcpy(args->mthd.data, data, size); + ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL); + memcpy(data, args->mthd.data, size); + if (args != (void *)stack) + kfree(args); + return ret; +} + +void +nvif_object_unmap(struct nvif_object *object) +{ + if (object->map.size) { + struct nvif_client *client = nvif_client(object); + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_unmap unmap; + } args = { + .ioctl.type = NVIF_IOCTL_V0_UNMAP, + }; + + if (object->map.ptr) { + client->driver->unmap(client, object->map.ptr, + object->map.size); + object->map.ptr = NULL; + } + + nvif_object_ioctl(object, &args, sizeof(args), NULL); + object->map.size = 0; + } +} + +int +nvif_object_map(struct nvif_object *object) +{ + struct nvif_client *client = nvif_client(object); + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_map_v0 map; + } args = { + .ioctl.type = NVIF_IOCTL_V0_MAP, + }; + int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret == 0) { + object->map.size = args.map.length; + object->map.ptr = client->driver->map(client, args.map.handle, + object->map.size); + if (ret = -ENOMEM, object->map.ptr) + return 0; + nvif_object_unmap(object); + } + return ret; +} + +struct ctor { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_new_v0 new; +}; + +void +nvif_object_fini(struct nvif_object *object) +{ + struct ctor *ctor = container_of(object->data, typeof(*ctor), new.data); + if (object->parent) { + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_del del; + } args = { + .ioctl.type = NVIF_IOCTL_V0_DEL, + }; + + nvif_object_unmap(object); + nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (object->data) { + object->size = 0; + object->data = NULL; + kfree(ctor); + } + nvif_object_ref(NULL, &object->parent); + } +} + +int +nvif_object_init(struct nvif_object *parent, void (*dtor)(struct nvif_object *), + u32 handle, u32 oclass, void *data, u32 size, + struct nvif_object *object) +{ + struct ctor *ctor; + int ret = 0; + + object->parent = NULL; + object->object = object; + nvif_object_ref(parent, &object->parent); + kref_init(&object->refcount); + object->handle = handle; + object->oclass = oclass; + object->data = NULL; + object->size = 0; + object->dtor = dtor; + object->map.ptr = NULL; + object->map.size = 0; + + if (object->parent) { + if (!(ctor = kmalloc(sizeof(*ctor) + size, GFP_KERNEL))) { + nvif_object_fini(object); + return -ENOMEM; + } + object->data = ctor->new.data; + object->size = size; + memcpy(object->data, data, size); + + ctor->ioctl.version = 0; + ctor->ioctl.type = NVIF_IOCTL_V0_NEW; + ctor->new.version = 0; + ctor->new.route = NVIF_IOCTL_V0_ROUTE_NVIF; + ctor->new.token = (unsigned long)(void *)object; + ctor->new.handle = handle; + ctor->new.oclass = oclass; + + ret = nvif_object_ioctl(parent, ctor, sizeof(*ctor) + + object->size, &object->priv); + } + + if (ret) + nvif_object_fini(object); + return ret; +} + +static void +nvif_object_del(struct nvif_object *object) +{ + nvif_object_fini(object); + kfree(object); +} + +int +nvif_object_new(struct nvif_object *parent, u32 handle, u32 oclass, + void *data, u32 size, struct nvif_object **pobject) +{ + struct nvif_object *object = kzalloc(sizeof(*object), GFP_KERNEL); + if (object) { + int ret = nvif_object_init(parent, nvif_object_del, handle, + oclass, data, size, object); + if (ret) + kfree(object); + *pobject = object; + return ret; + } + return -ENOMEM; +} + +static void +nvif_object_put(struct kref *kref) +{ + struct nvif_object *object = + container_of(kref, typeof(*object), refcount); + object->dtor(object); +} + +void +nvif_object_ref(struct nvif_object *object, struct nvif_object **pobject) +{ + if (object) + kref_get(&object->refcount); + if (*pobject) + kref_put(&(*pobject)->refcount, nvif_object_put); + *pobject = object; +} |