From 98fc793386560e6258383ff6f5bffcb04a8d273b Mon Sep 17 00:00:00 2001
From: Carter Li <zhangsongcui3371@sina.com>
Date: Fri, 2 Aug 2024 14:07:04 +0800
Subject: [PATCH] GPU (Linux): embed part of `asahi_drm.h` code

---
 src/detection/gpu/gpu_linux.c | 81 ++++++++++++++++++++++++++++++++---
 1 file changed, 75 insertions(+), 6 deletions(-)

diff --git a/src/detection/gpu/gpu_linux.c b/src/detection/gpu/gpu_linux.c
index 71b614c63..dee3ff961 100644
--- a/src/detection/gpu/gpu_linux.c
+++ b/src/detection/gpu/gpu_linux.c
@@ -10,14 +10,83 @@
 #include <inttypes.h>
 
 #if __aarch64__
-    #if __has_include(<drm/asahi_drm.h>) && FF_HAVE_DRM
-        #include <drm/asahi_drm.h>
+    #if FF_HAVE_DRM
         #include <drm.h>
         #include <fcntl.h>
         #include <sys/ioctl.h>
-        #define FF_HAVE_ASAHI_DRM_H 1
-    #else
-        #warning "<asahi_drm.h> not available"
+
+        #if !__has_include(<drm/asahi_drm.h>)
+        #include <drm/asahi_drm.h>
+        #else
+        /* SPDX-License-Identifier: MIT */
+        /* Copyright (C) The Asahi Linux Contributors */
+        #define DRM_ASAHI_GET_PARAMS			0x00
+        #define DRM_ASAHI_MAX_CLUSTERS	32
+        struct drm_asahi_params_global
+        {
+            __u32 unstable_uabi_version;
+            __u32 pad0;
+
+            __u64 feat_compat;
+            __u64 feat_incompat;
+
+            __u32 gpu_generation;
+            __u32 gpu_variant;
+            __u32 gpu_revision;
+            __u32 chip_id;
+
+            __u32 num_dies;
+            __u32 num_clusters_total;
+            __u32 num_cores_per_cluster;
+            __u32 num_frags_per_cluster;
+            __u32 num_gps_per_cluster;
+            __u32 num_cores_total_active;
+            __u64 core_masks[DRM_ASAHI_MAX_CLUSTERS];
+
+            __u32 vm_page_size;
+            __u32 pad1;
+            __u64 vm_user_start;
+            __u64 vm_user_end;
+            __u64 vm_shader_start;
+            __u64 vm_shader_end;
+
+            __u32 max_syncs_per_submission;
+            __u32 max_commands_per_submission;
+            __u32 max_commands_in_flight;
+            __u32 max_attachments;
+
+            __u32 timer_frequency_hz;
+            __u32 min_frequency_khz;
+            __u32 max_frequency_khz;
+            __u32 max_power_mw;
+
+            __u32 result_render_size;
+            __u32 result_compute_size;
+        };
+
+        struct drm_asahi_get_params
+        {
+            /** @extensions: Pointer to the first extension struct, if any */
+            __u64 extensions;
+
+            /** @param: Parameter group to fetch (MBZ) */
+            __u32 param_group;
+
+            /** @pad: MBZ */
+            __u32 pad;
+
+            /** @value: User pointer to write parameter struct */
+            __u64 pointer;
+
+            /** @value: Size of user buffer, max size supported on return */
+            __u64 size;
+        };
+
+        enum
+        {
+            DRM_IOCTL_ASAHI_GET_PARAMS       = DRM_IOWR(DRM_COMMAND_BASE + DRM_ASAHI_GET_PARAMS, struct drm_asahi_get_params),
+        };
+        #endif
     #endif
 #endif
 
@@ -338,7 +407,7 @@ FF_MAYBE_UNUSED static const char* detectAsahi(FFlist* gpus, FFstrbuf* buffer, F
 
     pciDetectDriver(gpu, drmDir, buffer, drmKey);
 
-    #if FF_HAVE_ASAHI_DRM_H
+    #if FF_HAVE_DRM
     ffStrbufSetS(buffer, "/dev/dri/");
     ffStrbufAppendS(buffer, drmKey);
     FF_AUTO_CLOSE_FD int fd = open(buffer->chars, O_RDONLY);