WSL2-Linux-Kernel/drivers/gpu/drm/nouveau/nvif/object.c

305 строки
7.3 KiB
C

/*
* 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);
object = NULL;
}
*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;
}