SunOS: support GPU detection

CMakeLists.txt

@@ -768,7 +768,7 @@ elseif(SunOS)
         src/detection/displayserver/linux/xcb.c
         src/detection/displayserver/linux/xlib.c
         src/detection/font/font_linux.c
-        src/detection/gpu/gpu_nosupport.c
+        src/detection/gpu/gpu_sunos.c
         src/detection/gpu/gpu_pci.c
         src/detection/gtk_qt/gtk.c
         src/detection/host/host_windows.c
@@ -1129,6 +1129,7 @@ elseif(SunOS)
         PRIVATE "m"
         PRIVATE "socket"
         PRIVATE "kstat"
+        PRIVATE "pciaccess"
     )
 elseif(ANDROID)
     CHECK_LIBRARY_EXISTS(-l:libandroid-wordexp.a wordexp "" HAVE_LIBANDROID_WORDEXP_STATIC)

src/detection/gpu/gpu.h

@@ -43,6 +43,6 @@ const char* ffDetectGPUImpl(const FFGPUOptions* options, FFlist* gpus);
 
 const char* ffGetGPUVendorString(unsigned vendorId);
 
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(__linux__) || defined(__FreeBSD__) || defined(__sun)
 void ffGPUParsePciIds(FFstrbuf* content, uint8_t subclass, uint16_t vendor, uint16_t device, FFGPUResult* gpu);
 #endif

src/detection/gpu/gpu_sunos.c

@@ -0,0 +1,55 @@
+#include "gpu.h"
+#include "common/properties.h"
+#include "common/io/io.h"
+
+#include <pciaccess.h>
+
+const char* ffDetectGPUImpl(FF_MAYBE_UNUSED const FFGPUOptions* options, FFlist* gpus)
+{
+    {
+        // Requires root access
+        // Same behavior can be observed with `cp $(which scanpci) /tmp/ && /tmp/scanpci`
+        FF_SUPPRESS_IO();
+        if (pci_system_init() < 0)
+            return "pci_system_init() failed";
+    }
+
+    struct pci_device_iterator* iter = pci_slot_match_iterator_create(NULL);
+
+    FF_STRBUF_AUTO_DESTROY pciids = ffStrbufCreate();
+    for (struct pci_device* dev = NULL; (dev = pci_device_next( iter )); )
+    {
+        if (dev->device_class >> 16 != 0x03 /*PCI_BASE_CLASS_DISPLAY*/)
+            continue;
+
+        FFGPUResult* gpu = (FFGPUResult*)ffListAdd(gpus);
+        ffStrbufInitStatic(&gpu->vendor, ffGetGPUVendorString(dev->vendor_id));
+        ffStrbufInit(&gpu->name);
+        ffStrbufInit(&gpu->driver);
+        ffStrbufInit(&gpu->platformApi);
+        gpu->temperature = FF_GPU_TEMP_UNSET;
+        gpu->coreCount = FF_GPU_CORE_COUNT_UNSET;
+        gpu->type = FF_GPU_TYPE_UNKNOWN;
+        gpu->dedicated.total = gpu->dedicated.used = gpu->shared.total = gpu->shared.used = FF_GPU_VMEM_SIZE_UNSET;
+        gpu->deviceId = ((uint64_t) dev->domain << 6) | ((uint64_t) dev->bus << 4) | (dev->dev << 2) | dev->func;
+        gpu->frequency = FF_GPU_FREQUENCY_UNSET;
+
+        if (gpu->vendor.chars == FF_GPU_VENDOR_NAME_AMD)
+        {
+            char query[32];
+            snprintf(query, sizeof(query), "%X,\t%X,", (unsigned) dev->device_id, (unsigned) dev->revision);
+            ffParsePropFileData("libdrm/amdgpu.ids", query, &gpu->name);
+        }
+
+        if (gpu->name.length == 0)
+        {
+            if (pciids.length == 0)
+                ffReadFileBuffer(FASTFETCH_TARGET_DIR_ROOT "/usr/share/hwdata/pci.ids", &pciids);;
+            ffGPUParsePciIds(&pciids, (dev->device_class >> 8) & 8, dev->vendor_id, dev->device_id, gpu);
+        }
+    }
+
+    pci_system_cleanup();
+
+    return NULL;
+}