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/*
* $Id$
* Copyright (C) 2007 Oliver McFadden <omcfadde@gmail.com>
* Copyright (C) 2011 Red Hat
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include <revenge_detect.h>
#include <revenge_main.h>
#define round_up(x, y) (((x) + (y) - 1) & ~((y) - 1))
#define round_down(x, y) ((x) & ~((y) - 1))
static unsigned long memory_virt_to_phys(unsigned long virt_addr)
{
unsigned page_num;
unsigned long phys_addr;
page_num = (virt_addr - pcigart_start) / ATI_PCIGART_PAGE_SIZE;
switch (option_interface) {
case INTERFACE_EVERGREEN:
case INTERFACE_R600:
phys_addr = pcigart_r600_mem_map[page_num] & 0xFFFFFFFFFFFFF000ULL;
break;
case INTERFACE_PCI_E:
case INTERFACE_PCI:
case INTERFACE_IGP:
case INTERFACE_RS690:
default:
assert (0);
break;
}
if (option_debug && option_verbose) {
printf("%s: virt_addr = 0x%016lx page_num = 0x%08x phys_addr = 0x%016lx\n",
__func__, virt_addr, page_num, phys_addr);
}
return phys_addr;
}
static void *memory_read_pcigart(unsigned int addr, unsigned int size)
{
unsigned int addr_mod;
unsigned int buf_size;
unsigned int start_page_addr, end_page_addr;
void *dest;
void *mem_map, *mem_map_ptr;
void *page_mem_map;
addr_mod = addr % ATI_PCIGART_PAGE_SIZE;
buf_size = round_up (addr_mod + size, ATI_PCIGART_PAGE_SIZE);
start_page_addr = round_down (addr, ATI_PCIGART_PAGE_SIZE);
end_page_addr = start_page_addr + buf_size;
if (!(mem_map = malloc(buf_size))) {
fprintf(stderr, "%s: %s:%d: %s\n", program_invocation_short_name,
__FILE__, __LINE__, strerror (errno));
exit(EXIT_FAILURE);
}
if (option_debug && option_verbose) {
printf("%s: addr = 0x%08x size = 0x%08x start_page_addr = 0x%08x end_page_addr = 0x%08x\n",
__func__, addr, size, start_page_addr, end_page_addr);
}
for (mem_map_ptr = mem_map; start_page_addr < end_page_addr;
start_page_addr += ATI_PCIGART_PAGE_SIZE, mem_map_ptr += ATI_PCIGART_PAGE_SIZE) {
if ((page_mem_map = mmap(NULL, ATI_PCIGART_PAGE_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, mem_fd, memory_virt_to_phys(start_page_addr))) == MAP_FAILED) {
fprintf (stderr, "%s: %s:%d: %s\n", program_invocation_short_name,
__FILE__, __LINE__, strerror (errno));
exit (EXIT_FAILURE);
}
memcpy(mem_map_ptr, page_mem_map, ATI_PCIGART_PAGE_SIZE);
if (munmap (page_mem_map, ATI_PCIGART_PAGE_SIZE) < 0) {
fprintf(stderr, "%s: %s:%d: %s\n", program_invocation_short_name,
__FILE__, __LINE__, strerror (errno));
exit(EXIT_FAILURE);
}
}
if (!(dest = malloc(size))) {
fprintf(stderr, "%s: %s:%d: %s\n", program_invocation_short_name,
__FILE__, __LINE__, strerror (errno));
exit(EXIT_FAILURE);
}
memcpy (dest, mem_map + addr_mod, size);
free (mem_map);
return dest;
}
void *memory_r600_read(unsigned int addr, unsigned int size)
{
void *mem_map;
switch (option_interface) {
case INTERFACE_EVERGREEN:
case INTERFACE_R600:
mem_map = memory_read_pcigart(addr, size);
break;
case INTERFACE_PCI_E:
case INTERFACE_PCI:
case INTERFACE_AGP:
case INTERFACE_IGP:
case INTERFACE_RS690:
default:
assert (0);
break;
}
return mem_map;
}
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