diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | man/Makefile.am | 1 | ||||
| -rw-r--r-- | man/intel_gtt.1 | 14 | ||||
| -rw-r--r-- | tools/Makefile.am | 1 | ||||
| -rw-r--r-- | tools/intel_gtt.c | 117 |
5 files changed, 134 insertions, 0 deletions
@@ -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 **)>t); + 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; +} |