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authorEric Anholt <eric@anholt.net>2010-02-01 15:02:24 -0800
committerEric Anholt <eric@anholt.net>2010-02-01 15:02:57 -0800
commita5846bff27ccd4f148c883177c9516c3f06da4b0 (patch)
tree3c24ff69a7148757213832dd8a1e21dfd61dc551
parent65f1f881b7a4a547c6ebdb75f8bddc99636210b9 (diff)
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.
-rw-r--r--.gitignore1
-rw-r--r--man/Makefile.am1
-rw-r--r--man/intel_gtt.114
-rw-r--r--tools/Makefile.am1
-rw-r--r--tools/intel_gtt.c117
5 files changed, 134 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
index 1462cbae..b176a3d9 100644
--- 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 70e5320e..2b9d8526 100644
--- 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
index 00000000..9d64e6bd
--- /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 62bb77b1..eb2b1fcd 100644
--- 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
index 00000000..2e71104c
--- /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;
+}