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59 lines
2.1 KiB
Diff
59 lines
2.1 KiB
Diff
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From 6e786d9e657dc3a0cb659dbf68a11fe75e554d8f Mon Sep 17 00:00:00 2001
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From: Thierry Reding <treding@nvidia.com>
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Date: Wed, 6 Oct 2021 22:47:17 +0200
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Subject: [PATCH 2/6] tegra: Use private reference count for resources
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With the recent addition of the shortcuts aiming to avoid atomic
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operations, the reference count on resources can become unbalanced
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in the Tegra driver since they are wrapped and then proxied to the
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Nouveau driver.
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Fix this by keeping a private reference count.
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Fixes: 7688b8ae9802 ("st/mesa: eliminate all atomic ops when setting vertex buffers")
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Tested-by: Karol Herbst <kherbst@redhat.com>
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---
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src/gallium/drivers/tegra/tegra_resource.h | 1 +
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src/gallium/drivers/tegra/tegra_screen.c | 6 ++++++
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2 files changed, 7 insertions(+)
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diff --git a/src/gallium/drivers/tegra/tegra_resource.h b/src/gallium/drivers/tegra/tegra_resource.h
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index 67507d64590..892afaf5e0f 100644
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--- a/src/gallium/drivers/tegra/tegra_resource.h
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+++ b/src/gallium/drivers/tegra/tegra_resource.h
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@@ -31,6 +31,7 @@ struct winsys_handle;
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struct tegra_resource {
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struct pipe_resource base;
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struct pipe_resource *gpu;
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+ unsigned int refcount;
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uint64_t modifier;
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uint32_t stride;
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diff --git a/src/gallium/drivers/tegra/tegra_screen.c b/src/gallium/drivers/tegra/tegra_screen.c
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index 2b108b07908..3c4c36e0c94 100644
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--- a/src/gallium/drivers/tegra/tegra_screen.c
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+++ b/src/gallium/drivers/tegra/tegra_screen.c
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@@ -245,6 +245,10 @@ tegra_screen_resource_create(struct pipe_screen *pscreen,
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pipe_reference_init(&resource->base.reference, 1);
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resource->base.screen = &screen->base;
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+ /* use private reference count for wrapped resources */
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+ resource->gpu->reference.count += 100000000;
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+ resource->refcount = 100000000;
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+
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return &resource->base;
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destroy:
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@@ -352,6 +356,8 @@ tegra_screen_resource_destroy(struct pipe_screen *pscreen,
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{
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struct tegra_resource *resource = to_tegra_resource(presource);
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+ /* adjust private reference count */
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+ p_atomic_add(&resource->gpu->reference.count, -resource->refcount);
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pipe_resource_reference(&resource->gpu, NULL);
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free(resource);
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}
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--
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2.31.1
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