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panfrost: Keep cached BOs mmap'd

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It doesn't make sense to munmap/mmap repeatedly; they're mapped GPU-side
anyway. So just munmap on free, which will happen in low-mem regardless.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5124>
This commit is contained in:
Alyssa Rosenzweig 2020-05-19 15:06:52 -04:00
parent 485ec76108
commit 794c239a99
1 changed files with 5 additions and 17 deletions
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22
src/panfrost/encoder/pan_bo.c
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@ -90,6 +90,11 @@ panfrost_bo_free(struct panfrost_bo *bo)
struct drm_gem_close gem_close = { .handle = bo->gem_handle };
int ret;
if (bo->cpu && os_munmap((void *) (uintptr_t)bo->cpu, bo->size)) {
perror("munmap");
abort();
}
ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
if (ret) {
fprintf(stderr, "DRM_IOCTL_GEM_CLOSE failed: %m\n");
@ -344,20 +349,6 @@ panfrost_bo_mmap(struct panfrost_bo *bo)
}
}
static void
panfrost_bo_munmap(struct panfrost_bo *bo)
{
if (!bo->cpu)
return;
if (os_munmap((void *) (uintptr_t)bo->cpu, bo->size)) {
perror("munmap");
abort();
}
bo->cpu = NULL;
}
struct panfrost_bo *
panfrost_bo_create(struct panfrost_device *dev, size_t size,
uint32_t flags)
@ -436,9 +427,6 @@ panfrost_bo_unreference(struct panfrost_bo *bo)
if (p_atomic_read(&bo->refcnt) == 0) {
_mesa_set_remove_key(bo->dev->active_bos, bo);
/* When the reference count goes to zero, we need to cleanup */
panfrost_bo_munmap(bo);
/* Rather than freeing the BO now, we'll cache the BO for later
* allocations if we're allowed to.
*/