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/*
* 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 "nouveau_drv.h"
#include "nouveau_usif.h"
#include "nouveau_abi16.h"
#include <nvif/unpack.h>
#include <nvif/client.h>
#include <nvif/ioctl.h>
#include <nvif/class.h>
#include <nvif/cl0080.h>
struct usif_object {
struct list_head head;
u8 route;
u64 token;
};
static void
usif_object_dtor(struct usif_object *object)
{
list_del(&object->head);
kfree(object);
}
static int
usif_object_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc, bool parent_abi16)
{
struct nouveau_cli *cli = nouveau_cli(f);
struct nvif_client *client = &cli->base;
union {
struct nvif_ioctl_new_v0 v0;
} *args = data;
struct usif_object *object;
int ret = -ENOSYS;
if ((ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true)))
return ret;
switch (args->v0.oclass) {
case NV_DMA_FROM_MEMORY:
case NV_DMA_TO_MEMORY:
case NV_DMA_IN_MEMORY:
return -EINVAL;
case NV_DEVICE: {
union {
struct nv_device_v0 v0;
} *args = data;
if ((ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false)))
return ret;
args->v0.priv = false;
break;
}
default:
if (!parent_abi16)
return -EINVAL;
break;
}
if (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
return -ENOMEM;
list_add(&object->head, &cli->objects);
object->route = args->v0.route;
object->token = args->v0.token;
args->v0.route = NVDRM_OBJECT_USIF;
args->v0.token = (unsigned long)(void *)object;
ret = nvif_client_ioctl(client, argv, argc);
if (ret) {
usif_object_dtor(object);
return ret;
}
args->v0.token = object->token;
args->v0.route = object->route;
return 0;
}
int
usif_ioctl(struct drm_file *filp, void __user *user, u32 argc)
{
struct nouveau_cli *cli = nouveau_cli(filp);
struct nvif_client *client = &cli->base;
void *data = kmalloc(argc, GFP_KERNEL);
u32 size = argc;
union {
struct nvif_ioctl_v0 v0;
} *argv = data;
struct usif_object *object;
bool abi16 = false;
u8 owner;
int ret;
if (ret = -ENOMEM, !argv)
goto done;
if (ret = -EFAULT, copy_from_user(argv, user, size))
goto done;
if (!(ret = nvif_unpack(-ENOSYS, &data, &size, argv->v0, 0, 0, true))) {
/* block access to objects not created via this interface */
owner = argv->v0.owner;
if (argv->v0.object == 0ULL &&
argv->v0.type != NVIF_IOCTL_V0_DEL)
argv->v0.owner = NVDRM_OBJECT_ANY; /* except client */
else
argv->v0.owner = NVDRM_OBJECT_USIF;
} else
goto done;
/* USIF slightly abuses some return-only ioctl members in order
* to provide interoperability with the older ABI16 objects
*/
mutex_lock(&cli->mutex);
if (argv->v0.route) {
if (ret = -EINVAL, argv->v0.route == 0xff)
ret = nouveau_abi16_usif(filp, argv, argc);
if (ret) {
mutex_unlock(&cli->mutex);
goto done;
}
abi16 = true;
}
switch (argv->v0.type) {
case NVIF_IOCTL_V0_NEW:
ret = usif_object_new(filp, data, size, argv, argc, abi16);
break;
default:
ret = nvif_client_ioctl(client, argv, argc);
break;
}
if (argv->v0.route == NVDRM_OBJECT_USIF) {
object = (void *)(unsigned long)argv->v0.token;
argv->v0.route = object->route;
argv->v0.token = object->token;
if (ret == 0 && argv->v0.type == NVIF_IOCTL_V0_DEL) {
list_del(&object->head);
kfree(object);
}
} else {
argv->v0.route = NVIF_IOCTL_V0_ROUTE_HIDDEN;
argv->v0.token = 0;
}
argv->v0.owner = owner;
mutex_unlock(&cli->mutex);
if (copy_to_user(user, argv, argc))
ret = -EFAULT;
done:
kfree(argv);
return ret;
}
void
usif_client_fini(struct nouveau_cli *cli)
{
struct usif_object *object, *otemp;
list_for_each_entry_safe(object, otemp, &cli->objects, head) {
usif_object_dtor(object);
}
}
void
usif_client_init(struct nouveau_cli *cli)
{
INIT_LIST_HEAD(&cli->objects);
}
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