summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nouveau_usif.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_usif.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_usif.c398
1 files changed, 0 insertions, 398 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_usif.c b/drivers/gpu/drm/nouveau/nouveau_usif.c
deleted file mode 100644
index 9dc10b17ad34..000000000000
--- a/drivers/gpu/drm/nouveau/nouveau_usif.c
+++ /dev/null
@@ -1,398 +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@redhat.com>
- */
-
-#include "nouveau_drv.h"
-#include "nouveau_usif.h"
-#include "nouveau_abi16.h"
-
-#include <nvif/notify.h>
-#include <nvif/unpack.h>
-#include <nvif/client.h>
-#include <nvif/event.h>
-#include <nvif/ioctl.h>
-
-struct usif_notify_p {
- struct drm_pending_event base;
- struct {
- struct drm_event base;
- u8 data[];
- } e;
-};
-
-struct usif_notify {
- struct list_head head;
- atomic_t enabled;
- u32 handle;
- u16 reply;
- u8 route;
- u64 token;
- struct usif_notify_p *p;
-};
-
-static inline struct usif_notify *
-usif_notify_find(struct drm_file *filp, u32 handle)
-{
- struct nouveau_cli *cli = nouveau_cli(filp);
- struct usif_notify *ntfy;
- list_for_each_entry(ntfy, &cli->notifys, head) {
- if (ntfy->handle == handle)
- return ntfy;
- }
- return NULL;
-}
-
-static inline void
-usif_notify_dtor(struct usif_notify *ntfy)
-{
- list_del(&ntfy->head);
- kfree(ntfy);
-}
-
-int
-usif_notify(const void *header, u32 length, const void *data, u32 size)
-{
- struct usif_notify *ntfy = NULL;
- const union {
- struct nvif_notify_rep_v0 v0;
- } *rep = header;
- struct drm_device *dev;
- struct drm_file *filp;
- unsigned long flags;
-
- if (length == sizeof(rep->v0) && rep->v0.version == 0) {
- if (WARN_ON(!(ntfy = (void *)(unsigned long)rep->v0.token)))
- return NVIF_NOTIFY_DROP;
- BUG_ON(rep->v0.route != NVDRM_NOTIFY_USIF);
- } else
- if (WARN_ON(1))
- return NVIF_NOTIFY_DROP;
-
- if (WARN_ON(!ntfy->p || ntfy->reply != (length + size)))
- return NVIF_NOTIFY_DROP;
- filp = ntfy->p->base.file_priv;
- dev = filp->minor->dev;
-
- memcpy(&ntfy->p->e.data[0], header, length);
- memcpy(&ntfy->p->e.data[length], data, size);
- switch (rep->v0.version) {
- case 0: {
- struct nvif_notify_rep_v0 *rep = (void *)ntfy->p->e.data;
- rep->route = ntfy->route;
- rep->token = ntfy->token;
- }
- break;
- default:
- BUG();
- break;
- }
-
- spin_lock_irqsave(&dev->event_lock, flags);
- if (!WARN_ON(filp->event_space < ntfy->p->e.base.length)) {
- list_add_tail(&ntfy->p->base.link, &filp->event_list);
- filp->event_space -= ntfy->p->e.base.length;
- }
- wake_up_interruptible(&filp->event_wait);
- spin_unlock_irqrestore(&dev->event_lock, flags);
- atomic_set(&ntfy->enabled, 0);
- return NVIF_NOTIFY_DROP;
-}
-
-static int
-usif_notify_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
-{
- struct nouveau_cli *cli = nouveau_cli(f);
- struct nvif_client *client = &cli->base;
- union {
- struct nvif_ioctl_ntfy_new_v0 v0;
- } *args = data;
- union {
- struct nvif_notify_req_v0 v0;
- } *req;
- struct usif_notify *ntfy;
- int ret = -ENOSYS;
-
- if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
- if (usif_notify_find(f, args->v0.index))
- return -EEXIST;
- } else
- return ret;
- req = data;
- ret = -ENOSYS;
-
- if (!(ntfy = kmalloc(sizeof(*ntfy), GFP_KERNEL)))
- return -ENOMEM;
- atomic_set(&ntfy->enabled, 0);
-
- if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, true))) {
- ntfy->reply = sizeof(struct nvif_notify_rep_v0) + req->v0.reply;
- ntfy->route = req->v0.route;
- ntfy->token = req->v0.token;
- req->v0.route = NVDRM_NOTIFY_USIF;
- req->v0.token = (unsigned long)(void *)ntfy;
- ret = nvif_client_ioctl(client, argv, argc);
- req->v0.token = ntfy->token;
- req->v0.route = ntfy->route;
- ntfy->handle = args->v0.index;
- }
-
- if (ret == 0)
- list_add(&ntfy->head, &cli->notifys);
- if (ret)
- kfree(ntfy);
- return ret;
-}
-
-static int
-usif_notify_del(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
-{
- struct nouveau_cli *cli = nouveau_cli(f);
- struct nvif_client *client = &cli->base;
- union {
- struct nvif_ioctl_ntfy_del_v0 v0;
- } *args = data;
- struct usif_notify *ntfy;
- int ret = -ENOSYS;
-
- if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
- if (!(ntfy = usif_notify_find(f, args->v0.index)))
- return -ENOENT;
- } else
- return ret;
-
- ret = nvif_client_ioctl(client, argv, argc);
- if (ret == 0)
- usif_notify_dtor(ntfy);
- return ret;
-}
-
-static int
-usif_notify_get(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
-{
- struct nouveau_cli *cli = nouveau_cli(f);
- struct nvif_client *client = &cli->base;
- union {
- struct nvif_ioctl_ntfy_del_v0 v0;
- } *args = data;
- struct usif_notify *ntfy;
- int ret = -ENOSYS;
-
- if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
- if (!(ntfy = usif_notify_find(f, args->v0.index)))
- return -ENOENT;
- } else
- return ret;
-
- if (atomic_xchg(&ntfy->enabled, 1))
- return 0;
-
- ntfy->p = kmalloc(sizeof(*ntfy->p) + ntfy->reply, GFP_KERNEL);
- if (ret = -ENOMEM, !ntfy->p)
- goto done;
- ntfy->p->base.event = &ntfy->p->e.base;
- ntfy->p->base.file_priv = f;
- ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF;
- ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply;
-
- ret = nvif_client_ioctl(client, argv, argc);
-done:
- if (ret) {
- atomic_set(&ntfy->enabled, 0);
- kfree(ntfy->p);
- }
- return ret;
-}
-
-static int
-usif_notify_put(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
-{
- struct nouveau_cli *cli = nouveau_cli(f);
- struct nvif_client *client = &cli->base;
- union {
- struct nvif_ioctl_ntfy_put_v0 v0;
- } *args = data;
- struct usif_notify *ntfy;
- int ret = -ENOSYS;
-
- if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
- if (!(ntfy = usif_notify_find(f, args->v0.index)))
- return -ENOENT;
- } else
- return ret;
-
- ret = nvif_client_ioctl(client, argv, argc);
- if (ret == 0 && atomic_xchg(&ntfy->enabled, 0))
- kfree(ntfy->p);
- return ret;
-}
-
-struct usif_object {
- struct list_head head;
- struct list_head ntfy;
- 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)
-{
- 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 (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
- return -ENOMEM;
- list_add(&object->head, &cli->objects);
-
- if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
- 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);
- args->v0.token = object->token;
- args->v0.route = object->route;
- }
-
- if (ret)
- usif_object_dtor(object);
- return ret;
-}
-
-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;
- 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;
- }
- }
-
- switch (argv->v0.type) {
- case NVIF_IOCTL_V0_NEW:
- ret = usif_object_new(filp, data, size, argv, argc);
- break;
- case NVIF_IOCTL_V0_NTFY_NEW:
- ret = usif_notify_new(filp, data, size, argv, argc);
- break;
- case NVIF_IOCTL_V0_NTFY_DEL:
- ret = usif_notify_del(filp, data, size, argv, argc);
- break;
- case NVIF_IOCTL_V0_NTFY_GET:
- ret = usif_notify_get(filp, data, size, argv, argc);
- break;
- case NVIF_IOCTL_V0_NTFY_PUT:
- ret = usif_notify_put(filp, data, size, argv, argc);
- 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;
- struct usif_notify *notify, *ntemp;
-
- list_for_each_entry_safe(notify, ntemp, &cli->notifys, head) {
- usif_notify_dtor(notify);
- }
-
- 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);
- INIT_LIST_HEAD(&cli->notifys);
-}
generated by cgit (git 2.34.1) at 2025-12-25 23:54:40 +0000