nouveau_usif.c was already stripped right back a couple of years ago,
limiting what userspace could do with it.
A follow-on series removes the nvkm side of these interfaces entirely,
in order to make it less of a nightmare to add/change internal APIs in
the future.
Unfortunately. Userspace uses some of this.
Fortunately, userspace only ever ended up using a fraction of the APIs,
so those are reimplemened here in a more direct manner, and return
-EINVAL to userspace for everything else.
v2:
- simplified struct nouveau_abi16_obj
- added a couple of comments
v3:
- comment harder
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
---
drivers/gpu/drm/nouveau/Kbuild | 1 -
drivers/gpu/drm/nouveau/nouveau_abi16.c | 286 ++++++++++++++++++++----
drivers/gpu/drm/nouveau/nouveau_abi16.h | 3 +-
drivers/gpu/drm/nouveau/nouveau_drm.c | 5 +-
drivers/gpu/drm/nouveau/nouveau_nvif.c | 1 -
drivers/gpu/drm/nouveau/nouveau_usif.c | 194 ----------------
drivers/gpu/drm/nouveau/nouveau_usif.h | 10 -
7 files changed, 251 insertions(+), 249 deletions(-)
delete mode 100644 drivers/gpu/drm/nouveau/nouveau_usif.c
delete mode 100644 drivers/gpu/drm/nouveau/nouveau_usif.h
diff --git a/drivers/gpu/drm/nouveau/Kbuild b/drivers/gpu/drm/nouveau/Kbuild
index c32c01827c1d..7b863355c5c6 100644
--- a/drivers/gpu/drm/nouveau/Kbuild
+++ b/drivers/gpu/drm/nouveau/Kbuild
@@ -25,7 +25,6 @@ nouveau-$(CONFIG_COMPAT) += nouveau_ioc32.o
nouveau-$(CONFIG_LEDS_CLASS) += nouveau_led.o
nouveau-y += nouveau_nvif.o
nouveau-$(CONFIG_NOUVEAU_PLATFORM_DRIVER) += nouveau_platform.o
-nouveau-y += nouveau_usif.o # userspace <-> nvif
nouveau-y += nouveau_vga.o
# DRM - memory management
diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index ac50c300d2eb..f2f5031d539f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -52,6 +52,7 @@ nouveau_abi16(struct drm_file *file_priv)
abi16->cli = cli;
INIT_LIST_HEAD(&abi16->channels);
+ INIT_LIST_HEAD(&abi16->objects);
/* allocate device object targeting client's default
* device (ie. the one that belongs to the fd it
@@ -88,6 +89,67 @@ nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
return ret;
}
+/* Tracks objects created via the DRM_NOUVEAU_NVIF ioctl.
+ *
+ * The only two types of object that userspace ever allocated via this
+ * interface are 'device', in order to retrieve basic device info, and
+ * 'engine objects', which instantiate HW classes on a channel.
+ *
+ * The remainder of what used to be available via DRM_NOUVEAU_NVIF has
+ * been removed, but these object types need to be tracked to maintain
+ * compatibility with userspace.
+ */
+struct nouveau_abi16_obj {
+ enum nouveau_abi16_obj_type {
+ DEVICE,
+ ENGOBJ,
+ } type;
+ u64 object;
+
+ struct nvif_object engobj;
+
+ struct list_head head; /* protected by nouveau_abi16.cli.mutex */
+};
+
+static struct nouveau_abi16_obj *
+nouveau_abi16_obj_find(struct nouveau_abi16 *abi16, u64 object)
+{
+ struct nouveau_abi16_obj *obj;
+
+ list_for_each_entry(obj, &abi16->objects, head) {
+ if (obj->object == object)
+ return obj;
+ }
+
+ return NULL;
+}
+
+static void
+nouveau_abi16_obj_del(struct nouveau_abi16_obj *obj)
+{
+ list_del(&obj->head);
+ kfree(obj);
+}
+
+static struct nouveau_abi16_obj *
+nouveau_abi16_obj_new(struct nouveau_abi16 *abi16, enum nouveau_abi16_obj_type type, u64 object)
+{
+ struct nouveau_abi16_obj *obj;
+
+ obj = nouveau_abi16_obj_find(abi16, object);
+ if (obj)
+ return ERR_PTR(-EEXIST);
+
+ obj = kzalloc(sizeof(*obj), GFP_KERNEL);
+ if (!obj)
+ return ERR_PTR(-ENOMEM);
+
+ obj->type = type;
+ obj->object = object;
+ list_add_tail(&obj->head, &abi16->objects);
+ return obj;
+}
+
s32
nouveau_abi16_swclass(struct nouveau_drm *drm)
{
@@ -167,6 +229,12 @@ nouveau_abi16_fini(struct nouveau_abi16 *abi16)
{
struct nouveau_cli *cli = abi16->cli;
struct nouveau_abi16_chan *chan, *temp;
+ struct nouveau_abi16_obj *obj, *tmp;
+
+ /* cleanup objects */
+ list_for_each_entry_safe(obj, tmp, &abi16->objects, head) {
+ nouveau_abi16_obj_del(obj);
+ }
/* cleanup channels */
list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
@@ -458,44 +526,6 @@ nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
return NULL;
}
-int
-nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
-{
- union {
- struct nvif_ioctl_v0 v0;
- } *args = data;
- struct nouveau_abi16_chan *chan;
- struct nouveau_abi16 *abi16;
- int ret = -ENOSYS;
-
- if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
- switch (args->v0.type) {
- case NVIF_IOCTL_V0_NEW:
- case NVIF_IOCTL_V0_MTHD:
- case NVIF_IOCTL_V0_SCLASS:
- break;
- default:
- return -EACCES;
- }
- } else
- return ret;
-
- if (!(abi16 = nouveau_abi16(file_priv)))
- return -ENOMEM;
-
- if (args->v0.token != ~0ULL) {
- if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
- return -EINVAL;
- args->v0.object = nvif_handle(&chan->chan->user);
- args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
- return 0;
- }
-
- args->v0.object = nvif_handle(&abi16->device.object);
- args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
- return 0;
-}
-
int
nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
{
@@ -705,3 +735,183 @@ nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
return nouveau_abi16_put(abi16, ret);
}
+
+static int
+nouveau_abi16_ioctl_mthd(struct nouveau_abi16 *abi16, struct nvif_ioctl_v0 *ioctl, u32 argc)
+{
+ struct nouveau_cli *cli = abi16->cli;
+ struct nvif_ioctl_mthd_v0 *args;
+ struct nouveau_abi16_obj *obj;
+ struct nv_device_info_v0 *info;
+
+ if (ioctl->route || argc < sizeof(*args))
+ return -EINVAL;
+ args = (void *)ioctl->data;
+ argc -= sizeof(*args);
+
+ obj = nouveau_abi16_obj_find(abi16, ioctl->object);
+ if (!obj || obj->type != DEVICE)
+ return -EINVAL;
+
+ if (args->method != NV_DEVICE_V0_INFO ||
+ argc != sizeof(*info))
+ return -EINVAL;
+
+ info = (void *)args->data;
+ if (info->version != 0x00)
+ return -EINVAL;
+
+ info = &cli->device.info;
+ memcpy(args->data, info, sizeof(*info));
+ return 0;
+}
+
+static int
+nouveau_abi16_ioctl_del(struct nouveau_abi16 *abi16, struct nvif_ioctl_v0 *ioctl, u32 argc)
+{
+ struct nouveau_abi16_obj *obj;
+
+ if (ioctl->route || argc)
+ return -EINVAL;
+
+ obj = nouveau_abi16_obj_find(abi16, ioctl->object);
+ if (obj) {
+ if (obj->type == ENGOBJ)
+ nvif_object_dtor(&obj->engobj);
+ nouveau_abi16_obj_del(obj);
+ }
+
+ return 0;
+}
+
+static int
+nouveau_abi16_ioctl_new(struct nouveau_abi16 *abi16, struct nvif_ioctl_v0 *ioctl, u32 argc)
+{
+ struct nvif_ioctl_new_v0 *args;
+ struct nouveau_abi16_chan *chan;
+ struct nouveau_abi16_obj *obj;
+ int ret;
+
+ if (argc < sizeof(*args))
+ return -EINVAL;
+ args = (void *)ioctl->data;
+ argc -= sizeof(*args);
+
+ if (args->version != 0)
+ return -EINVAL;
+
+ if (!ioctl->route) {
+ if (ioctl->object || args->oclass != NV_DEVICE)
+ return -EINVAL;
+
+ obj = nouveau_abi16_obj_new(abi16, DEVICE, args->object);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ return 0;
+ }
+
+ chan = nouveau_abi16_chan(abi16, ioctl->token);
+ if (!chan)
+ return -EINVAL;
+
+ obj = nouveau_abi16_obj_new(abi16, ENGOBJ, args->object);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ ret = nvif_object_ctor(&chan->chan->user, "abi16EngObj", args->handle, args->oclass,
+ NULL, 0, &obj->engobj);
+ if (ret)
+ nouveau_abi16_obj_del(obj);
+
+ return ret;
+}
+
+static int
+nouveau_abi16_ioctl_sclass(struct nouveau_abi16 *abi16, struct nvif_ioctl_v0 *ioctl, u32 argc)
+{
+ struct nvif_ioctl_sclass_v0 *args;
+ struct nouveau_abi16_chan *chan;
+ struct nvif_sclass *sclass;
+ int ret;
+
+ if (!ioctl->route || argc < sizeof(*args))
+ return -EINVAL;
+ args = (void *)ioctl->data;
+ argc -= sizeof(*args);
+
+ if (argc != args->count * sizeof(args->oclass[0]))
+ return -EINVAL;
+
+ chan = nouveau_abi16_chan(abi16, ioctl->token);
+ if (!chan)
+ return -EINVAL;
+
+ ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
+ if (ret < 0)
+ return ret;
+
+ for (int i = 0; i < min_t(u8, args->count, ret); i++) {
+ args->oclass[i].oclass = sclass[i].oclass;
+ args->oclass[i].minver = sclass[i].minver;
+ args->oclass[i].maxver = sclass[i].maxver;
+ }
+ args->count = ret;
+
+ nvif_object_sclass_put(&sclass);
+ return 0;
+}
+
+int
+nouveau_abi16_ioctl(struct drm_file *filp, void __user *user, u32 size)
+{
+ struct nvif_ioctl_v0 *ioctl;
+ struct nouveau_abi16 *abi16;
+ u32 argc = size;
+ int ret;
+
+ if (argc < sizeof(*ioctl))
+ return -EINVAL;
+ argc -= sizeof(*ioctl);
+
+ ioctl = kmalloc(size, GFP_KERNEL);
+ if (!ioctl)
+ return -ENOMEM;
+
+ ret = -EFAULT;
+ if (copy_from_user(ioctl, user, size))
+ goto done_free;
+
+ if (ioctl->version != 0x00 ||
+ (ioctl->route && ioctl->route != 0xff)) {
+ ret = -EINVAL;
+ goto done_free;
+ }
+
+ abi16 = nouveau_abi16_get(filp);
+ if (unlikely(!abi16)) {
+ ret = -ENOMEM;
+ goto done_free;
+ }
+
+ switch (ioctl->type) {
+ case NVIF_IOCTL_V0_SCLASS: ret = nouveau_abi16_ioctl_sclass(abi16, ioctl, argc); break;
+ case NVIF_IOCTL_V0_NEW : ret = nouveau_abi16_ioctl_new (abi16, ioctl, argc); break;
+ case NVIF_IOCTL_V0_DEL : ret = nouveau_abi16_ioctl_del (abi16, ioctl, argc); break;
+ case NVIF_IOCTL_V0_MTHD : ret = nouveau_abi16_ioctl_mthd (abi16, ioctl, argc); break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ nouveau_abi16_put(abi16, 0);
+
+ if (ret == 0) {
+ if (copy_to_user(user, ioctl, size))
+ ret = -EFAULT;
+ }
+
+done_free:
+ kfree(ioctl);
+ return ret;
+}
diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.h b/drivers/gpu/drm/nouveau/nouveau_abi16.h
index 0a9121e63143..75a883a44e04 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.h
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.h
@@ -34,13 +34,14 @@ struct nouveau_abi16 {
struct nvif_device device;
struct list_head channels;
u64 handles;
+ struct list_head objects;
};
struct nouveau_abi16 *nouveau_abi16_get(struct drm_file *);
int nouveau_abi16_put(struct nouveau_abi16 *, int);
void nouveau_abi16_fini(struct nouveau_abi16 *);
s32 nouveau_abi16_swclass(struct nouveau_drm *);
-int nouveau_abi16_usif(struct drm_file *, void *data, u32 size);
+int nouveau_abi16_ioctl(struct drm_file *, void __user *user, u32 size);
#define NOUVEAU_GEM_DOMAIN_VRAM (1 << 1)
#define NOUVEAU_GEM_DOMAIN_GART (1 << 2)
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index eb154b44c154..a018b5475478 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -63,7 +63,6 @@
#include "nouveau_abi16.h"
#include "nouveau_fence.h"
#include "nouveau_debugfs.h"
-#include "nouveau_usif.h"
#include "nouveau_connector.h"
#include "nouveau_platform.h"
#include "nouveau_svm.h"
@@ -200,7 +199,6 @@ nouveau_cli_fini(struct nouveau_cli *cli)
flush_work(&cli->work);
WARN_ON(!list_empty(&cli->worker));
- usif_client_fini(cli);
if (cli->sched)
nouveau_sched_destroy(&cli->sched);
if (uvmm)
@@ -249,7 +247,6 @@ nouveau_cli_init(struct nouveau_drm *drm, const char *sname,
snprintf(cli->name, sizeof(cli->name), "%s", sname);
cli->drm = drm;
mutex_init(&cli->mutex);
- usif_client_init(cli);
INIT_WORK(&cli->work, nouveau_cli_work);
INIT_LIST_HEAD(&cli->worker);
@@ -1267,7 +1264,7 @@ nouveau_drm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
switch (_IOC_NR(cmd) - DRM_COMMAND_BASE) {
case DRM_NOUVEAU_NVIF:
- ret = usif_ioctl(filp, (void __user *)arg, _IOC_SIZE(cmd));
+ ret = nouveau_abi16_ioctl(filp, (void __user *)arg, _IOC_SIZE(cmd));
break;
default:
ret = drm_ioctl(file, cmd, arg);
diff --git a/drivers/gpu/drm/nouveau/nouveau_nvif.c b/drivers/gpu/drm/nouveau/nouveau_nvif.c
index 1d49ebdfd5dc..9a7e3f64b79f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_nvif.c
+++ b/drivers/gpu/drm/nouveau/nouveau_nvif.c
@@ -35,7 +35,6 @@
#include <nvif/ioctl.h>
#include "nouveau_drv.h"
-#include "nouveau_usif.h"
static void
nvkm_client_unmap(void *priv, void __iomem *ptr, u32 size)
diff --git a/drivers/gpu/drm/nouveau/nouveau_usif.c b/drivers/gpu/drm/nouveau/nouveau_usif.c
deleted file mode 100644
index 002d1479ba89..000000000000
--- a/drivers/gpu/drm/nouveau/nouveau_usif.c
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * 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@xxxxxxxxxx>
- */
-
-#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);
-}
diff --git a/drivers/gpu/drm/nouveau/nouveau_usif.h b/drivers/gpu/drm/nouveau/nouveau_usif.h
deleted file mode 100644
index dc90d4a9d0d9..000000000000
--- a/drivers/gpu/drm/nouveau/nouveau_usif.h
+++ /dev/null
@@ -1,10 +0,0 @@
-/* SPDX-License-Identifier: MIT */
-#ifndef __NOUVEAU_USIF_H__
-#define __NOUVEAU_USIF_H__
-
-void usif_client_init(struct nouveau_cli *);
-void usif_client_fini(struct nouveau_cli *);
-int usif_ioctl(struct drm_file *, void __user *, u32);
-int usif_notify(const void *, u32, const void *, u32);
-
-#endif
--
2.45.1
