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/*
* Copyright © 2014 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdint.h>
#include "main.h"
/* i915_gem_gtt.h */
/* GEN8 legacy style address is defined as a 3 level page table:
* 31:30 | 29:21 | 20:12 | 11:0
* PDPE | PDE | PTE | offset
* The difference as compared to normal x86 3 level page table is the PDPEs are
* programmed via register.
*/
#define FOUR_PAGE_SIZE (4096 * 4)
#define PDE_COUNT_PER_PAGE 512
#define PTE_COUNT_PER_PDE 512
#define PDE_COUNT (4*PDE_COUNT_PER_PAGE)
#define PDE_MAPPABLE_SIZE (512*4096)
static uint64_t pd_page[PDE_COUNT];
static uint64_t pt_page[PTE_COUNT_PER_PDE];
int print_ppgtt_mapping(uint32_t pd_phyaddr)
{
uint32_t pde, pte;
uint64_t *pd;
/* first map page directory */
pd_phyaddr &= 0xfffff000;
lseek(devmem_fd, pd_phyaddr, SEEK_SET);
if (read(devmem_fd, pd_page, FOUR_PAGE_SIZE) != FOUR_PAGE_SIZE) {
perror("Read page directory content from /dev/mem failed\n");
exit(-1);
}
pd = &pd_page[0];
for (pde = 0; pde<PDE_COUNT; pde++) {
uint32_t pde_value, pde_addr;
uint32_t addr_start = pde * PDE_MAPPABLE_SIZE;
uint32_t addr_end=(pde+1)* PDE_MAPPABLE_SIZE;
uint64_t *pt;
if ((pd[pde] & 1) == 0) /* not valid */
continue;
pde_value = (uint32_t) pd[pde];
pde_addr = pde_value & 0xfffff000;
printf("pde[%04d]=0x%08x (ppgtt offset range:0x%08x~0x%08x(%04dM~%04dM)\n",
pde, pde_value, addr_start, addr_end, addr_start>>20, addr_end>>20);
lseek(devmem_fd, pde_addr, SEEK_SET);
if (read(devmem_fd, &pt_page[0], 4096) != 4096) {
perror("Read page table content from /dev/mem failed\n");
exit(-1);
}
pt = &pt_page[0];
for (pte=0; pte<PTE_COUNT_PER_PDE; pte++) {
uint32_t pte_value, pte_addr;
uint32_t addr;
if ((pt[pte] & 1) == 0)
continue;
if (pte > 0) {
if (pt[pte] == pt[pte-1])
continue;
}
pte_value = (uint32_t) pt[pte];
pte_addr = pte_value & 0xfffff000;
addr = addr_start + pte * 4096;
printf("\t pte[%03d] = 0x%08x(page no.=%06d, ppgtt addr 0x%x(%04dM+%04dK))\n",
pte, pte_value, pte_addr>>12, addr, addr>>20, (addr>>10)&0x3ff);
}
}
return 0;
}
int get_ppgtt_page(uint32_t pd_phyaddr, uint32_t addr, unsigned char one_page[])
{
uint32_t pdp_idx = (addr >> 30) & 0x3;
uint32_t pd_idx = (addr >> 21) & 0x1ff;
uint32_t pt_idx = (addr >> 12) & 0x1ff;
uint32_t pd_index, pde_value, pde_addr, pte_value, pte_addr;
/* first map page directory */
pd_phyaddr &= 0xfffff000;
/* get PDE entry */
lseek(devmem_fd, pd_phyaddr, SEEK_SET);
if (read(devmem_fd, &pd_page[0], FOUR_PAGE_SIZE) != FOUR_PAGE_SIZE) {
perror("Read page directory content from /dev/mem failed\n");
exit(-1);
}
/* get PTE entry */
pd_index = pdp_idx * PDE_COUNT_PER_PAGE + pd_idx;
pde_value = (uint32_t)(pd_page[pd_index] & 0xfffff000);
pde_addr = pde_value & 0xfffff000;
lseek(devmem_fd, pde_addr, SEEK_SET);
if (read(devmem_fd, &pt_page[0], 4096) != 4096) {
perror("Read page table content from /dev/mem failed\n");
exit(-1);
}
pte_value = (uint32_t)pt_page[pt_idx];
/*
printf("Batch buffer in PPGTT:(PD index %d(page %d, offset %d), entry 0x%08x)/(PT index %d, entry 0x%08x)\n",
pd_index, pdp_idx, pd_idx, pde_value, pt_idx, pte_value);
*/
pte_addr = pte_value & 0xfffff000;
lseek(devmem_fd, pte_addr, SEEK_SET);
if (read(devmem_fd, &one_page[0], 4096) != 4096) { /* read the content */
perror("Read page table content from /dev/mem failed\n");
exit(-1);
}
return 0;
}
int process_dumpppgtt(char *cmdhdr,unsigned int stat_addr)
{
uint32_t ppgtt_addr;
if (is_gen7) {
printf("PPGTT is not supported on GEN7\n");
return 0;
}
CHECK_STRICT_DEVMEM;
ppgtt_addr = get_ppgtt(stat_addr);
printf("Page directory address 0x%08x\n", ppgtt_addr);
print_ppgtt_mapping(ppgtt_addr);
return 0;
}
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