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// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//
// Generic firmware loader.
//
#include <linux/firmware.h>
#include <sound/sof.h>
#include "ops.h"
static int get_ext_windows(struct snd_sof_dev *sdev,
struct sof_ipc_ext_data_hdr *ext_hdr)
{
struct sof_ipc_window *w =
container_of(ext_hdr, struct sof_ipc_window, ext_hdr);
size_t size;
if (w->num_windows == 0 || w->num_windows > SOF_IPC_MAX_ELEMS)
return -EINVAL;
size = sizeof(*w) + sizeof(struct sof_ipc_window_elem) * w->num_windows;
/* keep a local copy of the data */
sdev->info_window = kmemdup(w, size, GFP_KERNEL);
if (!sdev->info_window)
return -ENOMEM;
return 0;
}
/* parse the extended FW boot data structures from FW boot message */
int snd_sof_fw_parse_ext_data(struct snd_sof_dev *sdev, u32 bar, u32 offset)
{
struct sof_ipc_ext_data_hdr *ext_hdr;
void *ext_data;
int ret = 0;
ext_data = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!ext_data)
return -ENOMEM;
/* get first header */
snd_sof_dsp_block_read(sdev, bar, offset, ext_data,
sizeof(*ext_hdr));
ext_hdr = ext_data;
while (ext_hdr->hdr.cmd == SOF_IPC_FW_READY) {
/* read in ext structure */
offset += sizeof(*ext_hdr);
snd_sof_dsp_block_read(sdev, bar, offset,
(void *)((u8 *)ext_data + sizeof(*ext_hdr)),
ext_hdr->hdr.size - sizeof(*ext_hdr));
dev_dbg(sdev->dev, "found ext header type %d size 0x%x\n",
ext_hdr->type, ext_hdr->hdr.size);
/* process structure data */
switch (ext_hdr->type) {
case SOF_IPC_EXT_DMA_BUFFER:
break;
case SOF_IPC_EXT_WINDOW:
ret = get_ext_windows(sdev, ext_hdr);
break;
default:
break;
}
if (ret < 0) {
dev_err(sdev->dev, "error: failed to parse ext data type %d\n",
ext_hdr->type);
break;
}
/* move to next header */
offset += ext_hdr->hdr.size;
snd_sof_dsp_block_read(sdev, bar, offset, ext_data,
sizeof(*ext_hdr));
ext_hdr = ext_data;
}
kfree(ext_data);
return ret;
}
EXPORT_SYMBOL(snd_sof_fw_parse_ext_data);
/* generic module parser for mmaped DSPs */
int snd_sof_parse_module_memcpy(struct snd_sof_dev *sdev,
struct snd_sof_mod_hdr *module)
{
struct snd_sof_blk_hdr *block;
int count;
u32 offset;
size_t remaining;
dev_dbg(sdev->dev, "new module size 0x%x blocks 0x%x type 0x%x\n",
module->size, module->num_blocks, module->type);
block = (struct snd_sof_blk_hdr *)((u8 *)module + sizeof(*module));
/* module->size doesn't include header size */
remaining = module->size;
for (count = 0; count < module->num_blocks; count++) {
/* check for wrap */
if (remaining < sizeof(*block)) {
dev_err(sdev->dev, "error: not enough data remaining\n");
return -EINVAL;
}
/* minus header size of block */
remaining -= sizeof(*block);
if (block->size == 0) {
dev_warn(sdev->dev,
"warning: block %d size zero\n", count);
dev_warn(sdev->dev, " type 0x%x offset 0x%x\n",
block->type, block->offset);
continue;
}
switch (block->type) {
case SOF_FW_BLK_TYPE_RSRVD0:
case SOF_FW_BLK_TYPE_SRAM...SOF_FW_BLK_TYPE_RSRVD14:
continue; /* not handled atm */
case SOF_FW_BLK_TYPE_IRAM:
case SOF_FW_BLK_TYPE_DRAM:
offset = block->offset;
break;
default:
dev_err(sdev->dev, "error: bad type 0x%x for block 0x%x\n",
block->type, count);
return -EINVAL;
}
dev_dbg(sdev->dev,
"block %d type 0x%x size 0x%x ==> offset 0x%x\n",
count, block->type, block->size, offset);
/* checking block->size to avoid unaligned access */
if (block->size % sizeof(u32)) {
dev_err(sdev->dev, "error: invalid block size 0x%x\n",
block->size);
return -EINVAL;
}
snd_sof_dsp_block_write(sdev, sdev->mmio_bar, offset,
block + 1, block->size);
if (remaining < block->size) {
dev_err(sdev->dev, "error: not enough data remaining\n");
return -EINVAL;
}
/* minus body size of block */
remaining -= block->size;
/* next block */
block = (struct snd_sof_blk_hdr *)((u8 *)block + sizeof(*block)
+ block->size);
}
return 0;
}
EXPORT_SYMBOL(snd_sof_parse_module_memcpy);
static int check_header(struct snd_sof_dev *sdev, const struct firmware *fw)
{
struct snd_sof_fw_header *header;
/* Read the header information from the data pointer */
header = (struct snd_sof_fw_header *)fw->data;
/* verify FW sig */
if (strncmp(header->sig, SND_SOF_FW_SIG, SND_SOF_FW_SIG_SIZE) != 0) {
dev_err(sdev->dev, "error: invalid firmware signature\n");
return -EINVAL;
}
/* check size is valid */
if (fw->size != header->file_size + sizeof(*header)) {
dev_err(sdev->dev, "error: invalid filesize mismatch got 0x%zx expected 0x%zx\n",
fw->size, header->file_size + sizeof(*header));
return -EINVAL;
}
dev_dbg(sdev->dev, "header size=0x%x modules=0x%x abi=0x%x size=%zu\n",
header->file_size, header->num_modules,
header->abi, sizeof(*header));
return 0;
}
static int load_modules(struct snd_sof_dev *sdev, const struct firmware *fw)
{
struct snd_sof_fw_header *header;
struct snd_sof_mod_hdr *module;
int (*load_module)(struct snd_sof_dev *sof_dev,
struct snd_sof_mod_hdr *hdr);
int ret, count;
size_t remaining;
header = (struct snd_sof_fw_header *)fw->data;
load_module = sof_ops(sdev)->load_module;
if (!load_module)
return -EINVAL;
/* parse each module */
module = (struct snd_sof_mod_hdr *)((u8 *)(fw->data) + sizeof(*header));
remaining = fw->size - sizeof(*header);
/* check for wrap */
if (remaining > fw->size) {
dev_err(sdev->dev, "error: fw size smaller than header size\n");
return -EINVAL;
}
for (count = 0; count < header->num_modules; count++) {
/* check for wrap */
if (remaining < sizeof(*module)) {
dev_err(sdev->dev, "error: not enough data remaining\n");
return -EINVAL;
}
/* minus header size of module */
remaining -= sizeof(*module);
/* module */
ret = load_module(sdev, module);
if (ret < 0) {
dev_err(sdev->dev, "error: invalid module %d\n", count);
return ret;
}
if (remaining < module->size) {
dev_err(sdev->dev, "error: not enough data remaining\n");
return -EINVAL;
}
/* minus body size of module */
remaining -= module->size;
module = (struct snd_sof_mod_hdr *)((u8 *)module
+
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