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drm/nouveau/ttm: always do buffer moves on kernel channel

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There was once good reasons for wanting the drm to be able to use M2MF etc
on user channels, but they're not relevant anymore.  For the general
buffer move case, we've already lost by transferring between vram/sysmem
already so the context switching overhead is minimal in comparison.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs
2012-03-16 12:40:17 +10:00
parent 2f5394c3ed
commit accf94969f
3 changed files with 4 additions and 19 deletions
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10
drivers/gpu/drm/nouveau/nouveau_gem.c
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@@ -426,9 +426,7 @@ validate_list(struct nouveau_channel *chan, struct list_head *list,
return ret;
}
nvbo->channel = (b->read_domains & (1 << 31)) ? NULL : chan;
ret = nouveau_bo_validate(nvbo, true, false, false);
nvbo->channel = NULL;
if (unlikely(ret)) {
if (ret != -ERESTARTSYS)
NV_ERROR(dev, "fail ttm_validate\n");
@@ -678,19 +676,13 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
return PTR_ERR(bo);
}
/* Mark push buffers as being used on PFIFO, the validation code
* will then make sure that if the pushbuf bo moves, that they
* happen on the kernel channel, which will in turn cause a sync
* to happen before we try and submit the push buffer.
*/
/* Ensure all push buffers are on validate list */
for (i = 0; i < req->nr_push; i++) {
if (push[i].bo_index >= req->nr_buffers) {
NV_ERROR(dev, "push %d buffer not in list\n", i);
ret = -EINVAL;
goto out_prevalid;
}
bo[push[i].bo_index].read_domains |= (1 << 31);
}
/* Validate buffer list */