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/*
* Copyright 2012 Red Hat Inc.
*
* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Ben Skeggs
*/
#include "priv.h"
#include <subdev/bios.h>
#include <subdev/bios/bmp.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/image.h>
static bool
nvbios_addr(struct nvkm_bios *bios, u32 *addr, u8 size)
{
u32 p = *addr;
if (*addr > bios->image0_size && bios->imaged_addr) {
*addr -= bios->image0_size;
*addr += bios->imaged_addr;
}
if (unlikely(*addr + size >= bios->size)) {
nvkm_error(&bios->subdev, "OOB %d %08x %08x\n", size, p, *addr);
return false;
}
return true;
}
u8
nvbios_rd08(struct nvkm_bios *bios, u32 addr)
{
if (likely(nvbios_addr(bios, &addr, 1)))
return bios->data[addr];
return 0x00;
}
u16
nvbios_rd16(struct nvkm_bios *bios, u32 addr)
{
if (likely(nvbios_addr(bios, &addr, 2)))
return get_unaligned_le16(&bios->data[addr]);
return 0x0000;
}
u32
nvbios_rd32(struct nvkm_bios *bios, u32 addr)
{
if (likely(nvbios_addr(bios, &addr, 4)))
return get_unaligned_le32(&bios->data[addr]);
return 0x00000000;
}
u8
nvbios_checksum(const u8 *data, int size)
{
u8 sum = 0;
while (size--)
sum += *data++;
return sum;
}
u16
nvbios_findstr(const u8 *data, int size, const char *str, int len)
{
int i, j;
for (i = 0; i <= (size - len); i++) {
for (j = 0; j < len; j++)
if ((char)data[i + j] != str[j])
break;
if (j == len)
return i;
}
return 0;
}
int
nvbios_memcmp(struct nvkm_bios *bios, u32 addr, const char *str, u32 len)
{
unsigned char c1, c2;
while (len--) {
c1 = nvbios_rd08(bios, addr++);
c2 = *(str++);
if (c1 != c2)
return c1 - c2;
}
return 0;
}
int
nvbios_extend(struct nvkm_bios *bios, u32 length)
{
if (bios->size < length) {
u8 *prev = bios->data;
if (!(bios->data = kmalloc(length, GFP_KERNEL))) {
bios->data = prev;
return -ENOMEM;
}
memcpy(bios->data, prev, bios->size);
bios->size = length;
kfree(prev);
return 1;
}
return 0;
}
static void *
nvkm_bios_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_bios *bios = nvkm_bios(subdev);
kfree(bios->data);
return bios;
}
static const struct nvkm_subdev_func
nvkm_bios = {
.dtor = nvkm_bios_dtor,
};
int
nvkm_bios_new(struct nvkm_device *device, int index, struct nvkm_bios **pbios)
{
struct nvkm_bios *bios;
struct nvbios_image image;
struct bit_entry bit_i;
int ret, idx = 0;
if (!(bios = *pbios = kzalloc(sizeof(*bios), GFP_KERNEL)))
return -ENOMEM;
nvkm_subdev_ctor(&nvkm_bios, device, index, &bios->subdev);
ret = nvbios_shadow(bios);
if (ret)
return ret;
/* Some tables have weird pointers that need adjustment before
* they're dereferenced. I'm not entirely sure why...
*/
if (nvbios_image(bios, idx++, &image)) {
bios->image0_size = image.size;
while (nvbios_image(bios, idx++, &image)) {
if (image.type == 0xe0) {
bios->imaged_addr = image.base;
break;
}
}
}
/* detect type of vbios we're dealing with */
bios->bmp_offset = nvbios_findstr(bios->data, bios->size,
"\xff\x7f""NV\0", 5);
if (bios->bmp_offset) {
nvkm_debug(&bios->subdev, "BMP version %x.%x\n",
bmp_version(bios) >> 8,
bmp_version(bios) & 0xff);
}
bios->bit_offset = nvbios_findstr(bios->data, bios->size,
"\xff\xb8""BIT", 5);
if (bios->bit_offset)
nvkm_debug(&bios->subdev, "BIT signature found\n");
/* determine the vbios version number */
if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) {
bios->version.major = nvbios_rd08(bios, bit_i.offset + 3);
bios->version.chip = nvbios_rd08(bios, bit_i.offset + 2);
bios->version.minor = nvbios_rd08(bios, bit_i.offset + 1);
bios->version.micro = nvbios_rd08(bios, bit_i.offset + 0);
bios->version.patch = nvbios_rd08(bios, bit_i.offset + 4);
} else
if (bmp_version(bios)) {
bios->version.major = nvbios_rd08(bios, bios->bmp_offset + 13);
bios->version.chip = nvbios_rd08(bios, bios->bmp_offset + 12);
bios->version.minor = nvbios_rd08(bios, bios->bmp_offset + 11);
bios->version.micro = nvbios_rd08(bios, bios->bmp_offset + 10);
}
nvkm_info(&bios->subdev, "version %02x.%02x.%02x.%02x.%02x\n",
bios->version.major, bios->version.chip,
bios->version.minor, bios->version.micro, bios->version.patch);
return 0;
}
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