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drm/nouveau: chan: provide nouveau_channel_kill()

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The new VM_BIND UAPI implementation introduced in subsequent commits
will allow asynchronous jobs processing push buffers and emitting fences.

If a job times out, we need a way to recover from this situation. For
now, simply kill the channel to unblock all hung up jobs and signal
userspace that the device is dead on the next EXEC or VM_BIND ioctl.

Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804182406.5222-10-dakr@redhat.com
This commit is contained in:
Danilo Krummrich 2023-08-04 20:23:49 +02:00
parent f124eef76f
commit 7576c4ca6d
2 changed files with 12 additions and 3 deletions
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14
drivers/gpu/drm/nouveau/nouveau_chan.c
View File

@ -40,6 +40,14 @@ MODULE_PARM_DESC(vram_pushbuf, "Create DMA push buffers in VRAM");
int nouveau_vram_pushbuf;
module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400);
void
nouveau_channel_kill(struct nouveau_channel *chan)
{
atomic_set(&chan->killed, 1);
if (chan->fence)
nouveau_fence_context_kill(chan->fence, -ENODEV);
}
static int
nouveau_channel_killed(struct nvif_event *event, void *repv, u32 repc)
{
@ -47,9 +55,9 @@ nouveau_channel_killed(struct nvif_event *event, void *repv, u32 repc)
struct nouveau_cli *cli = (void *)chan->user.client;
NV_PRINTK(warn, cli, "channel %d killed!\n", chan->chid);
atomic_set(&chan->killed, 1);
if (chan->fence)
nouveau_fence_context_kill(chan->fence, -ENODEV);
if (unlikely(!atomic_read(&chan->killed)))
nouveau_channel_kill(chan);
return NVIF_EVENT_DROP;
}

1
drivers/gpu/drm/nouveau/nouveau_chan.h
View File

@ -66,6 +66,7 @@ int nouveau_channel_new(struct nouveau_drm *, struct nvif_device *, bool priv,
u32 vram, u32 gart, struct nouveau_channel **);
void nouveau_channel_del(struct nouveau_channel **);
int nouveau_channel_idle(struct nouveau_channel *);
void nouveau_channel_kill(struct nouveau_channel *);
extern int nouveau_vram_pushbuf;