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bazzite/spec_files/mesa/gamescope.patch

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From c142933f0bc2d68d74c1f2f7d6902b8dc48699c7 Mon Sep 17 00:00:00 2001
From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Date: Mon, 21 Feb 2022 18:43:54 +0100
Subject: [PATCH] STEAMOS: Dynamic swapchain override for gamescope limiter
---
src/loader/loader_dri3_helper.c | 43 +++++++++++++++++++++++++++++++--
src/loader/loader_dri3_helper.h | 1 +
src/loader/meson.build | 2 +-
src/vulkan/wsi/meson.build | 2 +-
src/vulkan/wsi/wsi_common_x11.c | 38 +++++++++++++++++++++++++++++
5 files changed, 82 insertions(+), 4 deletions(-)
diff --git a/src/loader/loader_dri3_helper.c b/src/loader/loader_dri3_helper.c
index 11bf6472894..21ad0c28937 100644
--- a/src/loader/loader_dri3_helper.c
+++ b/src/loader/loader_dri3_helper.c
@@ -37,6 +37,7 @@
#include "loader_dri_helper.h"
#include "loader_dri3_helper.h"
#include "util/macros.h"
+#include "util/simple_mtx.h"
#include "drm-uapi/drm_fourcc.h"
/**
@@ -288,6 +289,30 @@ dri3_update_max_num_back(struct loader_dri3_drawable *draw)
}
}
+static unsigned
+gamescope_swapchain_override()
+{
+ const char *path = getenv("GAMESCOPE_LIMITER_FILE");
+ if (!path)
+ return 0;
+
+ static simple_mtx_t mtx = SIMPLE_MTX_INITIALIZER;
+ static int fd = -1;
+
+ simple_mtx_lock(&mtx);
+ if (fd < 0) {
+ fd = open(path, O_RDONLY);
+ }
+ simple_mtx_unlock(&mtx);
+
+ if (fd < 0)
+ return 0;
+
+ uint32_t override_value = 0;
+ pread(fd, &override_value, sizeof(override_value), 0);
+ return override_value;
+}
+
void
loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
{
@@ -302,10 +327,12 @@ loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
* PS. changing from value A to B and A < B won't cause swap out of order but
* may still gets wrong target_msc value at the beginning.
*/
- if (draw->swap_interval != interval)
- loader_dri3_swapbuffer_barrier(draw);
+ if (draw->orig_swap_interval != interval)
+ loader_dri3_swapbuffer_barrier(draw);
- draw->swap_interval = interval;
+ draw->orig_swap_interval = interval;
+ if (gamescope_swapchain_override() != 1)
+ draw->swap_interval = interval;
}
static void
@@ -437,6 +464,12 @@ loader_dri3_drawable_init(xcb_connection_t *conn,
draw->swap_interval = dri_get_initial_swap_interval(draw->dri_screen_render_gpu,
draw->ext->config);
+ draw->orig_swap_interval = draw->swap_interval;
+
+ unsigned gamescope_override = gamescope_swapchain_override();
+ if (gamescope_override == 1)
+ draw->swap_interval = 1;
+
dri3_update_max_num_back(draw);
/* Create a new drawable */
@@ -1091,6 +1124,12 @@ loader_dri3_swap_buffers_msc(struct loader_dri3_drawable *draw,
if (draw->type == LOADER_DRI3_DRAWABLE_WINDOW) {
dri3_fence_reset(draw->conn, back);
+ unsigned gamescope_override = gamescope_swapchain_override();
+ if (gamescope_override == 1)
+ draw->swap_interval = 1;
+ else
+ draw->swap_interval = draw->orig_swap_interval;
+
/* Compute when we want the frame shown by taking the last known
* successful MSC and adding in a swap interval for each outstanding swap
* request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
diff --git a/src/loader/loader_dri3_helper.h b/src/loader/loader_dri3_helper.h
index 1fd340bd145..b8f5eaaf190 100644
--- a/src/loader/loader_dri3_helper.h
+++ b/src/loader/loader_dri3_helper.h
@@ -178,6 +178,7 @@ struct loader_dri3_drawable {
bool block_on_depleted_buffers;
bool queries_buffer_age;
int swap_interval;
+ int orig_swap_interval;
struct loader_dri3_extensions *ext;
const struct loader_dri3_vtable *vtable;
diff --git a/src/loader/meson.build b/src/loader/meson.build
index 6334cb9815c..0dc8ef40c37 100644
--- a/src/loader/meson.build
+++ b/src/loader/meson.build
@@ -28,7 +28,7 @@ if with_platform_x11 and with_dri3
include_directories : [inc_include, inc_src],
dependencies : [
dep_libdrm, dep_xcb_dri3, dep_xcb_present, dep_xcb_sync, dep_xshmfence,
- dep_xcb_xfixes,
+ dep_xcb_xfixes, idep_mesautil
],
build_by_default : false,
)
diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index a42355971a7..ce03b95cb8e 100644
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -42,6 +42,7 @@
#include "util/hash_table.h"
#include "util/os_file.h"
#include "util/os_time.h"
+#include "util/simple_mtx.h"
#include "util/u_debug.h"
#include "util/u_thread.h"
#include "util/xmlconfig.h"
@@ -198,6 +199,30 @@ wsi_x11_detect_xwayland(xcb_connection_t *conn,
return is_xwayland;
}
+static unsigned
+gamescope_swapchain_override()
+{
+ const char *path = getenv("GAMESCOPE_LIMITER_FILE");
+ if (!path)
+ return 0;
+
+ static simple_mtx_t mtx = SIMPLE_MTX_INITIALIZER;
+ static int fd = -1;
+
+ simple_mtx_lock(&mtx);
+ if (fd < 0) {
+ fd = open(path, O_RDONLY);
+ }
+ simple_mtx_unlock(&mtx);
+
+ if (fd < 0)
+ return 0;
+
+ uint32_t override_value = 0;
+ pread(fd, &override_value, sizeof(override_value), 0);
+ return override_value;
+}
+
static struct wsi_x11_connection *
wsi_x11_connection_create(struct wsi_device *wsi_dev,
xcb_connection_t *conn)
@@ -1042,6 +1067,8 @@ struct x11_swapchain {
struct wsi_queue acquire_queue;
pthread_t queue_manager;
+ VkPresentModeKHR orig_present_mode;
+
/* Lock and condition variable that lets callers monitor forward progress in the swapchain.
* This includes:
* - Present ID completion updates (present_id).
@@ -1135,6 +1162,8 @@ static void x11_swapchain_notify_error(struct x11_swapchain *swapchain, VkResult
* is permanent once seen, and every subsequent call will return this. If
* this has not been seen, success will be returned.
*/
+#define x11_swapchain_result(chain, result) \
+ _x11_swapchain_result(chain, result, __FILE__, __LINE__)
static VkResult
_x11_swapchain_result(struct x11_swapchain *chain, VkResult result,
const char *file, int line)
@@ -1146,6 +1175,12 @@ _x11_swapchain_result(struct x11_swapchain *chain, VkResult result,
if (chain->status < 0)
return chain->status;
+ unsigned gamescope_override = gamescope_swapchain_override();
+ if ((gamescope_override == 1 && chain->base.present_mode != VK_PRESENT_MODE_FIFO_KHR) ||
+ (gamescope_override != 1 && chain->base.present_mode != chain->orig_present_mode)) {
+ return x11_swapchain_result(chain, VK_ERROR_OUT_OF_DATE_KHR);
+ }
+
/* If we have a new error, mark it as permanent on the chain and return. */
if (result < 0) {
#ifndef NDEBUG
@@ -1177,8 +1212,6 @@ _x11_swapchain_result(struct x11_swapchain *chain, VkResult result,
/* No changes, so return the last status. */
return chain->status;
}
-#define x11_swapchain_result(chain, result) \
- _x11_swapchain_result(chain, result, __FILE__, __LINE__)
static struct wsi_image *
x11_get_wsi_image(struct wsi_swapchain *wsi_chain, uint32_t image_index)
@@ -2554,6 +2587,10 @@ x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
xcb_void_cookie_t cookie;
VkResult result;
VkPresentModeKHR present_mode = wsi_swapchain_get_present_mode(wsi_device, pCreateInfo);
+ VkPresentModeKHR orig_present_mode = present_mode;
+
+ if (gamescope_swapchain_override() == 1)
+ present_mode = VK_PRESENT_MODE_FIFO_KHR;
assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR);
@@ -2666,6 +2703,7 @@ x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
chain->base.wait_for_present = x11_wait_for_present;
chain->base.release_images = x11_release_images;
chain->base.present_mode = present_mode;
+ chain->orig_present_mode = orig_present_mode;
chain->base.image_count = num_images;
chain->conn = conn;
chain->window = window;
--
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