Release 4.11 drivers/gpu/drm/nouveau/nvif/object.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 <nvif/object.h>
#include <nvif/client.h>
#include <nvif/driver.h>
#include <nvif/ioctl.h>
int
nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack)
{
struct nvif_client *client = object->client;
union {
struct nvif_ioctl_v0 v0;
} *args = data;
if (size >= sizeof(*args) && args->v0.version == 0) {
if (object != &client->object)
args->v0.object = nvif_handle(object);
else
args->v0.object = 0;
args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
} else
return -ENOSYS;
return client->driver->ioctl(client->object.priv, client->super,
data, size, hack);
}
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void
nvif_object_sclass_put(struct nvif_sclass **psclass)
{
kfree(*psclass);
*psclass = NULL;
}
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int
nvif_object_sclass_get(struct nvif_object *object, struct nvif_sclass **psclass)
{
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_sclass_v0 sclass;
} *args = NULL;
int ret, cnt = 0, i;
u32 size;
while (1) {
size = sizeof(*args) + cnt * sizeof(args->sclass.oclass[0]);
if (!(args = kmalloc(size, GFP_KERNEL)))
return -ENOMEM;
args->ioctl.version = 0;
args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
args->sclass.version = 0;
args->sclass.count = cnt;
ret = nvif_object_ioctl(object, args, size, NULL);
if (ret == 0 && args->sclass.count <= cnt)
break;
cnt = args->sclass.count;
kfree(args);
if (ret != 0)
return ret;
}
*psclass = kzalloc(sizeof(**psclass) * args->sclass.count, GFP_KERNEL);
if (*psclass) {
for (i = 0; i < args->sclass.count; i++) {
(*psclass)[i].oclass = args->sclass.oclass[i].oclass;
(*psclass)[i].minver = args->sclass.oclass[i].minver;
(*psclass)[i].maxver = args->sclass.oclass[i].maxver;
}
ret = args->sclass.count;
} else {
ret = -ENOMEM;
}
kfree(args);
return ret;
}
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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;
}
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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? */
}
}
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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;
}
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void
nvif_object_unmap(struct nvif_object *object)
{
if (object->map.size) {
struct nvif_client *client = object->client;
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;
}
}
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int
nvif_object_map(struct nvif_object *object)
{
struct nvif_client *client = object->client;
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;
}
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void
nvif_object_fini(struct nvif_object *object)
{
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_del del;
} args = {
.ioctl.type = NVIF_IOCTL_V0_DEL,
};
if (!object->client)
return;
nvif_object_unmap(object);
nvif_object_ioctl(object, &args, sizeof(args), NULL);
object->client = NULL;
}
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int
nvif_object_init(struct nvif_object *parent, u32 handle, s32 oclass,
void *data, u32 size, struct nvif_object *object)
{
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_new_v0 new;
} *args;
int ret = 0;
object->client = NULL;
object->handle = handle;
object->oclass = oclass;
object->map.ptr = NULL;
object->map.size = 0;
if (parent) {
if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) {
nvif_object_fini(object);
return -ENOMEM;
}
args->ioctl.version = 0;
args->ioctl.type = NVIF_IOCTL_V0_NEW;
args->new.version = 0;
args->new.route = parent->client->route;
args->new.token = nvif_handle(object);
args->new.object = nvif_handle(object);
args->new.handle = handle;
args->new.oclass = oclass;
memcpy(args->new.data, data, size);
ret = nvif_object_ioctl(parent, args, sizeof(*args) + size,
&object->priv);
memcpy(data, args->new.data, size);
kfree(args);
if (ret == 0)
object->client = parent->client;
}
if (ret)
nvif_object_fini(object);
return ret;
}
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