diff options
| author | Danilo Krummrich <dakr@redhat.com> | 2023-10-02 15:46:48 +0200 |
|---|---|---|
| committer | Danilo Krummrich <dakr@redhat.com> | 2023-10-04 00:10:18 +0200 |
| commit | d59e75eef52d89201aaf5342a3ac23ddf3e9b112 (patch) | |
| tree | 1afbf0272f482863b77a80163c1cc628ab6d7365 /drivers/gpu/drm/nouveau/nouveau_chan.c | |
| parent | bbe08a0e11ae76fc466c11b9fa6dd6eb52544a46 (diff) | |
drm/nouveau: exec: report max pushs through getparam
Report the maximum number of IBs that can be pushed with a single
DRM_IOCTL_NOUVEAU_EXEC through DRM_IOCTL_NOUVEAU_GETPARAM.
While the maximum number of IBs per ring might vary between chipsets,
the kernel will make sure that userspace can only push a fraction of the
maximum number of IBs per ring per job, such that we avoid a situation
where there's only a single job occupying the ring, which could
potentially lead to the ring run dry.
Using DRM_IOCTL_NOUVEAU_GETPARAM to report the maximum number of IBs
that can be pushed with a single DRM_IOCTL_NOUVEAU_EXEC implies that
all channels of a given device have the same ring size.
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231002135008.10651-3-dakr@redhat.com
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_chan.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_chan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c b/drivers/gpu/drm/nouveau/nouveau_chan.c index 68e9b08a4803..7c97b2886807 100644 --- a/drivers/gpu/drm/nouveau/nouveau_chan.c +++ b/drivers/gpu/drm/nouveau/nouveau_chan.c @@ -454,7 +454,7 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart) chan->user_get = 0x44; chan->user_get_hi = 0x60; chan->dma.ib_base = 0x10000 / 4; - chan->dma.ib_max = (0x02000 / 8) - 1; + chan->dma.ib_max = NV50_DMA_IB_MAX; chan->dma.ib_put = 0; chan->dma.ib_free = chan->dma.ib_max - chan->dma.ib_put; chan->dma.max = chan->dma.ib_base; |