2 files changed, 85 insertions, 0 deletions
diff --git a/src/broadcom/common/v3d_device_info.c b/src/broadcom/common/v3d_device_info.c
new file mode 100644
index 00000000000..272190eb2e5
--- /dev/null
+++ b/src/broadcom/common/v3d_device_info.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright © 2016 Broadcom
+ *
+ * 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.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "common/v3d_device_info.h"
+#include "drm-uapi/v3d_drm.h"
+
+bool
+v3d_get_device_info(int fd, struct v3d_device_info* devinfo, v3d_ioctl_fun drm_ioctl) {
+    struct drm_v3d_get_param ident0 = {
+            .param = DRM_V3D_PARAM_V3D_CORE0_IDENT0,
+    };
+    struct drm_v3d_get_param ident1 = {
+            .param = DRM_V3D_PARAM_V3D_CORE0_IDENT1,
+    };
+    int ret;
+
+    ret = drm_ioctl(fd, DRM_IOCTL_V3D_GET_PARAM, &ident0);
+    if (ret != 0) {
+            fprintf(stderr, "Couldn't get V3D core IDENT0: %s\n",
+                    strerror(errno));
+            return false;
+    }
+    ret = drm_ioctl(fd, DRM_IOCTL_V3D_GET_PARAM, &ident1);
+    if (ret != 0) {
+            fprintf(stderr, "Couldn't get V3D core IDENT1: %s\n",
+                    strerror(errno));
+            return false;
+    }
+
+    uint32_t major = (ident0.value >> 24) & 0xff;
+    uint32_t minor = (ident1.value >> 0) & 0xf;
+
+    devinfo->ver = major * 10 + minor;
+
+    devinfo->vpm_size = (ident1.value >> 28 & 0xf) * 8192;
+
+    int nslc = (ident1.value >> 4) & 0xf;
+    int qups = (ident1.value >> 8) & 0xf;
+    devinfo->qpu_count = nslc * qups;
+
+    switch (devinfo->ver) {
+        case 33:
+        case 41:
+        case 42:
+                break;
+        default:
+                fprintf(stderr,
+                        "V3D %d.%d not supported by this version of Mesa.\n",
+                        devinfo->ver / 10,
+                        devinfo->ver % 10);
+                return false;
+    }
+
+    return true;
+}
diff --git a/src/broadcom/common/v3d_device_info.h b/src/broadcom/common/v3d_device_info.h
index 608b5845444..97abd9b8d9f 100644
--- a/src/broadcom/common/v3d_device_info.h
+++ b/src/broadcom/common/v3d_device_info.h
@@ -24,6 +24,7 @@
 #ifndef V3D_CHIP_H
 #define V3D_CHIP_H
 
+#include <stdbool.h>
 #include <stdint.h>
 
 /**
@@ -40,4 +41,9 @@ struct v3d_device_info {
         int qpu_count;
 };
 
+typedef int (*v3d_ioctl_fun)(int fd, unsigned long request, void *arg);
+
+bool
+v3d_get_device_info(int fd, struct v3d_device_info* devinfo, v3d_ioctl_fun fun);
+
 #endif