intel_gtt: Add intel_gtt from the 2D driver.

We've used it several times in bringing up the AGP driver, so it seems
useful to have aronud.

diff --git a/.gitignore b/.gitignore
index 1462cba..b176a3d 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -51,6 +51,7 @@ tools/intel_decode
 tools/intel_gpu_dump
 tools/intel_gpu_time
 tools/intel_gpu_top
+tools/intel_gtt
 tools/intel_reg_dumper
 tools/intel_reg_write
 tools/intel_stepping

diff --git a/man/Makefile.am b/man/Makefile.am
index 70e5320..2b9d852 100644 (file)
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -1,6 +1,7 @@
 dist_man1_MANS = \
        intel_gpu_dump.1 \
        intel_gpu_top.1 \
+       intel_gtt.1 \
        intel_reg_dumper.1 \
        intel_reg_write.1 \
        intel_stepping.1 \

diff --git a/man/intel_gtt.1 b/man/intel_gtt.1
new file mode 100644 (file)
index 0000000..9d64e6b
--- /dev/null
+++ b/man/intel_gtt.1
@@ -0,0 +1,14 @@
+emacs .\" shorthand for double quote that works everywhere.
+.ds q \N'34'
+.TH intel_gtt 1 "intel_gtt 1.0"
+.SH NAME
+intel_gtt \- Dump the contents of an Intel GPU's GTT
+.SH SYNOPSIS
+.B intel_gtt
+.SH DESCRIPTION
+.B intel_
+is a tool to view the contents of the GTT on an Intel GPU.  The GTT is
+the page table that maps between GPU addresses and system memory.
+This tool can be useful in debugging the Linux AGP driver
+initialization of the chip or in debugging later overwriting of the
+GTT with garbage data.

diff --git a/tools/Makefile.am b/tools/Makefile.am
index 62bb77b..eb2b1fc 100644 (file)
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -4,6 +4,7 @@ bin_PROGRAMS = \
        intel_gpu_dump \
        intel_gpu_top \
        intel_gpu_time \
+       intel_gtt \
        intel_stepping \
        intel_reg_dumper \
        intel_reg_write \

diff --git a/tools/intel_gtt.c b/tools/intel_gtt.c
new file mode 100644 (file)
index 0000000..2e71104
--- /dev/null
+++ b/tools/intel_gtt.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright © 2008 Intel Corporation
+ *
+ * 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.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <pciaccess.h>
+#include <err.h>
+#include <unistd.h>
+
+#include "intel_gpu_tools.h"
+
+#define INGTT(offset) (*(volatile uint32_t *)(gtt + (offset) / (KB(4) / 4)))
+
+#define KB(x) ((x) * 1024)
+#define MB(x) ((x) * 1024 * 1024)
+
+int main(int argc, char **argv)
+{
+       int start, aper_size;
+       unsigned char *gtt;
+
+       intel_get_mmio();
+
+       if (!IS_9XX(devid)) {
+               printf("Unsupported chipset for gtt dumper\n");
+               exit(1);
+       }
+
+       if (IS_G4X(devid) || IS_IRONLAKE(devid))
+               gtt = ((unsigned char *)mmio + MB(2));
+       else if (IS_965(devid))
+               gtt = ((unsigned char *)mmio + KB(512));
+       else {
+               /* 915/945 chips has GTT range in bar 3 */
+               int err;
+               err = pci_device_map_range(pci_dev,
+                                          pci_dev->regions[3].base_addr,
+                                          pci_dev->regions[3].size,
+                                          PCI_DEV_MAP_FLAG_WRITABLE,
+                                          (void **)&gtt);
+               if (err != 0) {
+                       fprintf(stderr, "mapping GTT bar failed\n");
+                       exit(1);
+               }
+       }
+
+       aper_size = pci_dev->regions[2].size;
+
+       for (start = 0; start < aper_size; start += KB(4)) {
+               uint32_t start_pte = INGTT(start);
+               uint32_t end;
+               int constant_length = 0;
+               int linear_length = 0;
+
+               /* Check if it's a linear sequence */
+               for (end = start + KB(4); end < aper_size; end += KB(4)) {
+                       uint32_t end_pte = INGTT(end);
+                       if (end_pte == start_pte + (end - start))
+                               linear_length++;
+                       else
+                               break;
+               }
+               if (linear_length > 0) {
+                       printf("0x%08x - 0x%08x: linear from "
+                              "0x%08x to 0x%08x\n",
+                              start, end - KB(4),
+                              start_pte, start_pte + (end - start) - KB(4));
+                       start = end - KB(4);
+                       continue;
+               }
+
+               /* Check if it's a constant sequence */
+               for (end = start + KB(4); end < aper_size; end += KB(4)) {
+                       uint32_t end_pte = INGTT(end);
+                       if (end_pte == start_pte)
+                               constant_length++;
+                       else
+                               break;
+               }
+               if (constant_length > 0) {
+                       printf("0x%08x - 0x%08x: constant 0x%08x\n",
+                              start, end - KB(4), start_pte);
+                       start = end - KB(4);
+                       continue;
+               }
+
+               printf("0x%08x: 0x%08x\n", start, start_pte);
+       }
+
+       return 0;
+}