loader: add special logic to distinguish nouveau from nouveau_vieux

There are a lot of different pci ids supported by nouveau, and more are
added all the time. The relevant distinguisher between drivers is the
chipset id.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Cc: "10.1" <mesa-stable@lists.freedesktop.org>

src/glx/dri2_glx.c

@@ -1201,6 +1201,16 @@ dri2CreateScreen(int screen, struct glx_display * priv)
       goto handle_error;
    }
 
+   if (drmGetMagic(psc->fd, &magic)) {
+      ErrorMessageF("failed to get magic\n");
+      goto handle_error;
+   }
+
+   if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
+      ErrorMessageF("failed to authenticate magic %d\n", magic);
+      goto handle_error;
+   }
+
    /* If Mesa knows about the appropriate driver for this fd, then trust it.
     * Otherwise, default to the server's value.
     */
@@ -1232,16 +1242,6 @@ dri2CreateScreen(int screen, struct glx_display * priv)
       goto handle_error;
    }
 
-   if (drmGetMagic(psc->fd, &magic)) {
-      ErrorMessageF("failed to get magic\n");
-      goto handle_error;
-   }
-
-   if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
-      ErrorMessageF("failed to authenticate magic %d\n", magic);
-      goto handle_error;
-   }
-
    if (psc->dri2->base.version >= 4) {
       psc->driScreen =
          psc->dri2->createNewScreen2(screen, psc->fd,

src/loader/Makefile.sources

@@ -1,2 +1,3 @@
 LOADER_C_FILES := \
-	loader.c
+	loader.c \
+	pci_id_driver_map.c

src/loader/loader.c

@@ -78,7 +78,7 @@
 #endif
 
 #define __IS_LOADER
-#include "pci_ids/pci_id_driver_map.h"
+#include "pci_id_driver_map.h"
 
 static void default_logger(int level, const char *fmt, ...)
 {
@@ -352,6 +352,9 @@ loader_get_driver_for_fd(int fd, unsigned driver_types)
       if (!(driver_types & driver_map[i].driver_types))
          continue;
 
+      if (driver_map[i].predicate && !driver_map[i].predicate(fd))
+         continue;
+
       if (driver_map[i].num_chips_ids == -1) {
          driver = strdup(driver_map[i].driver);
          goto out;

src/loader/pci_id_driver_map.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2014 Ilia Mirkin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+int is_nouveau_vieux(int fd);
+
+#ifndef __NOT_HAVE_DRM_H
+
+#include <xf86drm.h>
+#include <nouveau_drm.h>
+
+static int
+nouveau_chipset(int fd)
+{
+   struct drm_nouveau_getparam gp = { NOUVEAU_GETPARAM_CHIPSET_ID, 0 };
+   int ret;
+
+   ret = drmCommandWriteRead(fd, DRM_NOUVEAU_GETPARAM, &gp, sizeof(gp));
+   if (ret)
+      return -1;
+
+   return gp.value;
+}
+
+int
+is_nouveau_vieux(int fd)
+{
+   int chipset = nouveau_chipset(fd);
+   return chipset > 0 && chipset < 0x30;
+}
+
+#else
+
+int is_nouveau_vieux(int fd) { return 0; }
+
+#endif

src/loader/pci_id_driver_map.h

@@ -59,12 +59,15 @@ static const int vmwgfx_chip_ids[] = {
 #undef CHIPSET
 };
 
+int is_nouveau_vieux(int fd);
+
 static const struct {
    int vendor_id;
    const char *driver;
    const int *chip_ids;
    int num_chips_ids;
    unsigned driver_types;
+   int (*predicate)(int fd);
 } driver_map[] = {
    { 0x8086, "i915", i915_chip_ids, ARRAY_SIZE(i915_chip_ids), _LOADER_DRI | _LOADER_GALLIUM },
    { 0x8086, "i965", i965_chip_ids, ARRAY_SIZE(i965_chip_ids), _LOADER_DRI | _LOADER_GALLIUM },
@@ -73,7 +76,8 @@ static const struct {
    { 0x1002, "r300", r300_chip_ids, ARRAY_SIZE(r300_chip_ids), _LOADER_GALLIUM },
    { 0x1002, "r600", r600_chip_ids, ARRAY_SIZE(r600_chip_ids), _LOADER_GALLIUM },
    { 0x1002, "radeonsi", radeonsi_chip_ids, ARRAY_SIZE(radeonsi_chip_ids), _LOADER_GALLIUM},
-   { 0x10de, "nouveau", NULL, -1,  _LOADER_GALLIUM  },
+   { 0x10de, "nouveau_vieux", NULL, -1,  _LOADER_DRI, is_nouveau_vieux },
+   { 0x10de, "nouveau", NULL, -1,  _LOADER_GALLIUM },
    { 0x15ad, "vmwgfx", vmwgfx_chip_ids, ARRAY_SIZE(vmwgfx_chip_ids), _LOADER_GALLIUM },
    { 0x0000, NULL, NULL, 0 },
 };