385 lines
9.4 KiB
C
385 lines
9.4 KiB
C
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/*
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* Copyright 2014 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs <bskeggs@redhat.com>
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*/
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#include "nouveau_drm.h"
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#include "nouveau_usif.h"
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#include <nvif/notify.h>
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#include <nvif/unpack.h>
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#include <nvif/client.h>
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#include <nvif/event.h>
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#include <nvif/ioctl.h>
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struct usif_notify_p {
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struct drm_pending_event base;
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struct {
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struct drm_event base;
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u8 data[];
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} e;
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};
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struct usif_notify {
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struct list_head head;
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atomic_t enabled;
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u32 handle;
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u16 reply;
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u8 route;
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u64 token;
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struct usif_notify_p *p;
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};
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static inline struct usif_notify *
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usif_notify_find(struct drm_file *filp, u32 handle)
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{
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struct nouveau_cli *cli = nouveau_cli(filp);
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struct usif_notify *ntfy;
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list_for_each_entry(ntfy, &cli->notifys, head) {
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if (ntfy->handle == handle)
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return ntfy;
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}
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return NULL;
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}
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static inline void
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usif_notify_dtor(struct usif_notify *ntfy)
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{
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list_del(&ntfy->head);
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kfree(ntfy);
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}
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int
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usif_notify(const void *header, u32 length, const void *data, u32 size)
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{
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struct usif_notify *ntfy = NULL;
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const union {
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struct nvif_notify_rep_v0 v0;
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} *rep = header;
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struct drm_device *dev;
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struct drm_file *filp;
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unsigned long flags;
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if (length == sizeof(rep->v0) && rep->v0.version == 0) {
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if (WARN_ON(!(ntfy = (void *)(unsigned long)rep->v0.token)))
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return NVIF_NOTIFY_DROP;
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BUG_ON(rep->v0.route != NVDRM_NOTIFY_USIF);
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} else
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if (WARN_ON(1))
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return NVIF_NOTIFY_DROP;
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if (WARN_ON(!ntfy->p || ntfy->reply != (length + size)))
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return NVIF_NOTIFY_DROP;
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filp = ntfy->p->base.file_priv;
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dev = filp->minor->dev;
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memcpy(&ntfy->p->e.data[0], header, length);
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memcpy(&ntfy->p->e.data[length], data, size);
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switch (rep->v0.version) {
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case 0: {
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struct nvif_notify_rep_v0 *rep = (void *)ntfy->p->e.data;
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rep->route = ntfy->route;
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rep->token = ntfy->token;
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}
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break;
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default:
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BUG_ON(1);
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break;
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}
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spin_lock_irqsave(&dev->event_lock, flags);
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if (!WARN_ON(filp->event_space < ntfy->p->e.base.length)) {
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list_add_tail(&ntfy->p->base.link, &filp->event_list);
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filp->event_space -= ntfy->p->e.base.length;
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}
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wake_up_interruptible(&filp->event_wait);
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spin_unlock_irqrestore(&dev->event_lock, flags);
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atomic_set(&ntfy->enabled, 0);
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return NVIF_NOTIFY_DROP;
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}
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static int
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usif_notify_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
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{
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struct nouveau_cli *cli = nouveau_cli(f);
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struct nvif_client *client = &cli->base;
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union {
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struct nvif_ioctl_ntfy_new_v0 v0;
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} *args = data;
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union {
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struct nvif_notify_req_v0 v0;
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} *req;
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struct usif_notify *ntfy;
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int ret;
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if (nvif_unpack(args->v0, 0, 0, true)) {
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if (usif_notify_find(f, args->v0.index))
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return -EEXIST;
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} else
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return ret;
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req = data;
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if (!(ntfy = kmalloc(sizeof(*ntfy), GFP_KERNEL)))
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return -ENOMEM;
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atomic_set(&ntfy->enabled, 0);
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if (nvif_unpack(req->v0, 0, 0, true)) {
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ntfy->reply = sizeof(struct nvif_notify_rep_v0) + req->v0.reply;
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ntfy->route = req->v0.route;
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ntfy->token = req->v0.token;
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req->v0.route = NVDRM_NOTIFY_USIF;
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req->v0.token = (unsigned long)(void *)ntfy;
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ret = nvif_client_ioctl(client, argv, argc);
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req->v0.token = ntfy->token;
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req->v0.route = ntfy->route;
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ntfy->handle = args->v0.index;
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}
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if (ret == 0)
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list_add(&ntfy->head, &cli->notifys);
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if (ret)
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kfree(ntfy);
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return ret;
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}
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static int
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usif_notify_del(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
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{
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struct nouveau_cli *cli = nouveau_cli(f);
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struct nvif_client *client = &cli->base;
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union {
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struct nvif_ioctl_ntfy_del_v0 v0;
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} *args = data;
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struct usif_notify *ntfy;
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int ret;
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if (nvif_unpack(args->v0, 0, 0, true)) {
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if (!(ntfy = usif_notify_find(f, args->v0.index)))
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return -ENOENT;
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} else
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return ret;
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ret = nvif_client_ioctl(client, argv, argc);
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if (ret == 0)
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usif_notify_dtor(ntfy);
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return ret;
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}
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static int
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usif_notify_get(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
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{
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struct nouveau_cli *cli = nouveau_cli(f);
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struct nvif_client *client = &cli->base;
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union {
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struct nvif_ioctl_ntfy_del_v0 v0;
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} *args = data;
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struct usif_notify *ntfy;
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int ret;
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if (nvif_unpack(args->v0, 0, 0, true)) {
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if (!(ntfy = usif_notify_find(f, args->v0.index)))
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return -ENOENT;
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} else
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return ret;
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if (atomic_xchg(&ntfy->enabled, 1))
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return 0;
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ntfy->p = kmalloc(sizeof(*ntfy->p) + ntfy->reply, GFP_KERNEL);
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if (ret = -ENOMEM, !ntfy->p)
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goto done;
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ntfy->p->base.event = &ntfy->p->e.base;
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ntfy->p->base.file_priv = f;
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ntfy->p->base.pid = current->pid;
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ntfy->p->base.destroy =(void(*)(struct drm_pending_event *))kfree;
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ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF;
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ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply;
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ret = nvif_client_ioctl(client, argv, argc);
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done:
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if (ret) {
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atomic_set(&ntfy->enabled, 0);
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kfree(ntfy->p);
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}
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return ret;
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}
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static int
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usif_notify_put(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
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{
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struct nouveau_cli *cli = nouveau_cli(f);
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struct nvif_client *client = &cli->base;
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union {
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struct nvif_ioctl_ntfy_put_v0 v0;
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} *args = data;
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struct usif_notify *ntfy;
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int ret;
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if (nvif_unpack(args->v0, 0, 0, true)) {
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if (!(ntfy = usif_notify_find(f, args->v0.index)))
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return -ENOENT;
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} else
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return ret;
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ret = nvif_client_ioctl(client, argv, argc);
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if (ret == 0 && atomic_xchg(&ntfy->enabled, 0))
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kfree(ntfy->p);
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return ret;
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}
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struct usif_object {
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struct list_head head;
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struct list_head ntfy;
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u8 route;
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u64 token;
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};
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static void
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usif_object_dtor(struct usif_object *object)
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{
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list_del(&object->head);
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kfree(object);
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}
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static int
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usif_object_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
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{
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struct nouveau_cli *cli = nouveau_cli(f);
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struct nvif_client *client = &cli->base;
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union {
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struct nvif_ioctl_new_v0 v0;
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} *args = data;
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struct usif_object *object;
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int ret;
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if (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
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return -ENOMEM;
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list_add(&object->head, &cli->objects);
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if (nvif_unpack(args->v0, 0, 0, true)) {
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object->route = args->v0.route;
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object->token = args->v0.token;
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args->v0.route = NVDRM_OBJECT_USIF;
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args->v0.token = (unsigned long)(void *)object;
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ret = nvif_client_ioctl(client, argv, argc);
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args->v0.token = object->token;
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args->v0.route = object->route;
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}
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if (ret)
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usif_object_dtor(object);
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return ret;
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}
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int
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usif_ioctl(struct drm_file *filp, void __user *user, u32 argc)
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{
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struct nouveau_cli *cli = nouveau_cli(filp);
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struct nvif_client *client = &cli->base;
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void *data = kmalloc(argc, GFP_KERNEL);
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u32 size = argc;
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union {
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struct nvif_ioctl_v0 v0;
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} *argv = data;
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struct usif_object *object;
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u8 owner;
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int ret;
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if (ret = -ENOMEM, !argv)
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goto done;
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if (ret = -EFAULT, copy_from_user(argv, user, size))
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goto done;
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if (nvif_unpack(argv->v0, 0, 0, true)) {
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/* block access to objects not created via this interface */
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owner = argv->v0.owner;
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argv->v0.owner = NVDRM_OBJECT_USIF;
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} else
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goto done;
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mutex_lock(&cli->mutex);
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switch (argv->v0.type) {
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case NVIF_IOCTL_V0_NEW:
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/* ... except if we're creating children */
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argv->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
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ret = usif_object_new(filp, data, size, argv, argc);
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break;
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case NVIF_IOCTL_V0_NTFY_NEW:
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ret = usif_notify_new(filp, data, size, argv, argc);
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break;
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case NVIF_IOCTL_V0_NTFY_DEL:
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ret = usif_notify_del(filp, data, size, argv, argc);
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break;
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case NVIF_IOCTL_V0_NTFY_GET:
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ret = usif_notify_get(filp, data, size, argv, argc);
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break;
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case NVIF_IOCTL_V0_NTFY_PUT:
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ret = usif_notify_put(filp, data, size, argv, argc);
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break;
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default:
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ret = nvif_client_ioctl(client, argv, argc);
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break;
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}
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if (argv->v0.route == NVDRM_OBJECT_USIF) {
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object = (void *)(unsigned long)argv->v0.token;
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argv->v0.route = object->route;
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argv->v0.token = object->token;
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if (ret == 0 && argv->v0.type == NVIF_IOCTL_V0_DEL) {
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list_del(&object->head);
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kfree(object);
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}
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} else {
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argv->v0.route = NVIF_IOCTL_V0_ROUTE_HIDDEN;
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argv->v0.token = 0;
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}
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argv->v0.owner = owner;
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mutex_unlock(&cli->mutex);
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if (copy_to_user(user, argv, argc))
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ret = -EFAULT;
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done:
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kfree(argv);
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return ret;
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}
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void
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usif_client_fini(struct nouveau_cli *cli)
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|
|
{
|
||
|
|
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);
|
||
|
|
}
|