loader: abstract loader_get_kernel_driver_name for reuse

[mesa.git] / src / loader / loader.c

diff --git a/src/loader/loader.c b/src/loader/loader.c
index 3c67f9dc2448a34dbf8e21341edc94860207a0af..28a4c5855c99f40e2ce1b67e982c414bcbbc674c 100644 (file)
--- a/src/loader/loader.c
+++ b/src/loader/loader.c
@@ -82,6 +82,26 @@ loader_open_device(const char *device_name)
    return fd;
 }
 
+static char *loader_get_kernel_driver_name(int fd)
+{
+#if HAVE_LIBDRM
+   char *driver;
+   drmVersionPtr version = drmGetVersion(fd);
+
+   if (!version) {
+      log_(_LOADER_WARNING, "failed to get driver name for fd %d\n", fd);
+      return NULL;
+   }
+
+   driver = strndup(version->name, version->name_len);
+
+   drmFreeVersion(version);
+   return driver;
+#else
+   return NULL;
+#endif
+}
+
 #if defined(HAVE_LIBDRM)
 #ifdef USE_DRICONF
 static const char __driConfigOptionsLoader[] =
@@ -110,18 +130,43 @@ static char *loader_get_dri_config_device_id(void)
 
 static char *drm_construct_id_path_tag(drmDevicePtr device)
 {
-/* Length of "pci-xxxx_xx_xx_x\0" */
-#define PCI_ID_PATH_TAG_LENGTH 17
    char *tag = NULL;
 
    if (device->bustype == DRM_BUS_PCI) {
-        tag = calloc(PCI_ID_PATH_TAG_LENGTH, sizeof(char));
-        if (tag == NULL)
-            return NULL;
+      if (asprintf(&tag, "pci-%04x_%02x_%02x_%1u",
+                   device->businfo.pci->domain,
+                   device->businfo.pci->bus,
+                   device->businfo.pci->dev,
+                   device->businfo.pci->func) < 0) {
+         return NULL;
+      }
+   } else if (device->bustype == DRM_BUS_PLATFORM ||
+              device->bustype == DRM_BUS_HOST1X) {
+      char *fullname, *name, *address;
+
+      if (device->bustype == DRM_BUS_PLATFORM)
+         fullname = device->businfo.platform->fullname;
+      else
+         fullname = device->businfo.host1x->fullname;
+
+      name = strrchr(fullname, '/');
+      if (!name)
+         name = strdup(fullname);
+      else
+         name = strdup(name + 1);
+
+      address = strchr(name, '@');
+      if (address) {
+         *address++ = '\0';
+
+         if (asprintf(&tag, "platform-%s_%s", address, name) < 0)
+            tag = NULL;
+      } else {
+         if (asprintf(&tag, "platform-%s", name) < 0)
+            tag = NULL;
+      }
 
-        snprintf(tag, PCI_ID_PATH_TAG_LENGTH, "pci-%04x_%02x_%02x_%1u",
-                 device->businfo.pci->domain, device->businfo.pci->bus,
-                 device->businfo.pci->dev, device->businfo.pci->func);
+      free(name);
    }
    return tag;
 }
@@ -314,22 +359,9 @@ loader_get_driver_for_fd(int fd)
    }
 
    if (!loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id)) {
-
-#if HAVE_LIBDRM
-      /* fallback to drmGetVersion(): */
-      drmVersionPtr version = drmGetVersion(fd);
-
-      if (!version) {
-         log_(_LOADER_WARNING, "failed to get driver name for fd %d\n", fd);
-         return NULL;
-      }
-
-      driver = strndup(version->name, version->name_len);
-      log_(_LOADER_INFO, "using driver %s for %d\n", driver, fd);
-
-      drmFreeVersion(version);
-#endif
-
+      driver = loader_get_kernel_driver_name(fd);
+      if (driver)
+         log_(_LOADER_INFO, "using driver %s for %d\n", driver, fd);
       return driver;
    }
 
@@ -383,8 +415,8 @@ loader_get_extensions_name(const char *driver_name)
 
    const size_t len = strlen(name);
    for (size_t i = 0; i < len; i++) {
-          if (name[i] == '-')
-                  name[i] = '_';
+      if (name[i] == '-')
+         name[i] = '_';
    }
 
    return name;