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/*
* 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>
*
*/
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <pciaccess.h>
#include <unistd.h>
#include "intel_io.h"
#include "intel_chipset.h"
#define KB(x) ((x) * 1024)
#define MB(x) ((x) * 1024 * 1024)
unsigned char *gtt;
uint32_t devid;
typedef uint32_t gen6_gtt_pte_t;
typedef uint64_t gen8_gtt_pte_t;
static gen6_gtt_pte_t gen6_gtt_pte(const unsigned i)
{
return *((volatile gen6_gtt_pte_t *)(gtt) + i);
}
static gen8_gtt_pte_t gen8_gtt_pte(const unsigned i)
{
return *((volatile gen8_gtt_pte_t *)(gtt) + i);
}
static uint64_t ingtt(const unsigned offset)
{
if (intel_gen(devid) < 8)
return gen6_gtt_pte(offset/KB(4));
return gen8_gtt_pte(offset/KB(4));
}
static uint64_t get_phys(uint32_t pt_offset)
{
uint64_t pae = 0;
uint64_t phys = ingtt(pt_offset);
if (intel_gen(devid) < 4 && !IS_G33(devid))
return phys & ~0xfff;
switch (intel_gen(devid)) {
case 3:
case 4:
case 5:
pae = (phys & 0xf0) << 28;
break;
case 6:
case 7:
if (IS_HASWELL(devid))
pae = (phys & 0x7f0) << 28;
else
pae = (phys & 0xff0) << 28;
break;
case 8:
case 9:
phys = phys & 0x7ffffff000;
break;
default:
fprintf(stderr, "Unsupported platform\n");
exit(-1);
}
return (phys | pae) & ~0xfff;
}
static void pte_dump(int size, uint32_t offset) {
int pte_size;
int entries;
unsigned int i;
/* Want to print 4 ptes at a time (4b PTE assumed). */
if (size % 16)
size = (size + 16) & ~0xffff;
if (intel_gen(devid) < 8)
pte_size = 4;
else
pte_size = 8;
entries = size / pte_size;
printf("GTT offset | %d PTEs (%d MB)\n", entries,
entries * 4096 / 1024 / 1024);
printf("----------------------------------------------------------\n");
for (i = 0; i < entries; i += 4) {
if (intel_gen(devid) < 8) {
printf(" 0x%08x | 0x%08x 0x%08x 0x%08x 0x%08x\n",
KB(4 * i),
gen6_gtt_pte(i + 0),
gen6_gtt_pte(i + 1),
gen6_gtt_pte(i + 2),
gen6_gtt_pte(i + 3) );
} else {
printf(" 0x%08x | 0x%016" PRIx64 " 0x%016" PRIx64
" 0x%016" PRIx64 " 0x%016" PRIx64 " \n",
KB(4 * i),
gen8_gtt_pte(i + 0),
gen8_gtt_pte(i + 1),
gen8_gtt_pte(i + 2),
gen8_gtt_pte(i + 3) );
}
}
}
int main(int argc, char **argv)
{
struct pci_device *pci_dev;
unsigned int start, gtt_size;
int flag[] = {
PCI_DEV_MAP_FLAG_WRITE_COMBINE,
PCI_DEV_MAP_FLAG_WRITABLE,
0
}, f;
pci_dev = intel_get_pci_device();
devid = pci_dev->device_id;
if (IS_GEN2(devid)) {
printf("Unsupported chipset for gtt dumper\n");
exit(1);
}
for (f = 0; flag[f] != 0; f++) {
if (IS_GEN3(devid)) {
/* 915/945 chips has GTT range in bar 3 */
if (pci_device_map_range(pci_dev,
pci_dev->regions[3].base_addr,
pci_dev->regions[3].size,
flag[f],
(void **)>t) == 0)
break;
} else {
unsigned offset;
offset = pci_dev->regions[0].size / 2;
if (IS_GEN4(devid))
offset = KB(512);
if (pci_device_map_range(pci_dev,
pci_dev->regions[0].base_addr + offset,
offset,
flag[f],
(void **)>t) == 0)
break;
}
}
if (flag[f] == 0) {
printf("Failed to map gtt\n");
exit(1);
}
gtt_size = pci_dev->regions[0].size / 2;
if (argc > 1 && !strncmp("-d", argv[1], 2)) {
pte_dump(gtt_size, 0);
return 0;
}
for (start = 0; start < gtt_size; start += KB(4)) {
uint64_t start_phys = get_phys(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 < gtt_size; end += KB(4)) {
uint64_t end_phys = get_phys(end);
if (end_phys == start_phys + (end - start))
linear_length++;
else
break;
}
if (linear_length > 0) {
printf("0x%08x - 0x%08x: linear from "
"0x%" PRIx64 " to 0x%" PRIx64 "\n",
start, end - KB(4),
start_phys, start_phys + (end - start) - KB(4));
start = end - KB(4);
continue;
}
/* Check if it's a constant sequence */
for (end = start + KB(4); end < gtt_size; end += KB(4)) {
uint64_t end_phys = get_phys(end);
if (end_phys == start_phys)
constant_length++;
else
break;
}
if (constant_length > 0) {
printf("0x%08x - 0x%08x: constant 0x%" PRIx64 "\n",
start, end - KB(4), start_phys);
start = end - KB(4);
continue;
}
printf("0x%08x: 0x%" PRIx64 "\n", start, start_phys);
}
return 0;
}
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