Orange Pi5 kernel

// SPDX-License-Identifier: ISC
/*
 * Copyright (c) 2015-2016 Qualcomm Atheros, Inc.
 */
 
/* This file has implementation for code swap logic. With code swap feature,
 * target can run the fw binary with even smaller IRAM size by using host
 * memory to store some of the code segments.
 */
 
#include "core.h"
#include "bmi.h"
#include "debug.h"
 
static int ath10k_swap_code_seg_fill(struct ath10k *ar,
<------><------><------><------>     struct ath10k_swap_code_seg_info *seg_info,
<------><------><------><------>     const void *data, size_t data_len)
{
<------>u8 *virt_addr = seg_info->virt_address[0];
<------>u8 swap_magic[ATH10K_SWAP_CODE_SEG_MAGIC_BYTES_SZ] = {};
<------>const u8 *fw_data = data;
<------>union ath10k_swap_code_seg_item *swap_item;
<------>u32 length = 0;
<------>u32 payload_len;
<------>u32 total_payload_len = 0;
<------>u32 size_left = data_len;
 
<------>/* Parse swap bin and copy the content to host allocated memory.
<------> * The format is Address, length and value. The last 4-bytes is
<------> * target write address. Currently address field is not used.
<------> */
<------>seg_info->target_addr = -1;
<------>while (size_left >= sizeof(*swap_item)) {
<------><------>swap_item = (union ath10k_swap_code_seg_item *)fw_data;
<------><------>payload_len = __le32_to_cpu(swap_item->tlv.length);
<------><------>if ((payload_len > size_left) ||
<------><------>    (payload_len == 0 &&
<------><------>     size_left != sizeof(struct ath10k_swap_code_seg_tail))) {
<------><------><------>ath10k_err(ar, "refusing to parse invalid tlv length %d\n",
<------><------><------><------>   payload_len);
<------><------><------>return -EINVAL;
<------><------>}
 
<------><------>if (payload_len == 0) {
<------><------><------>if (memcmp(swap_item->tail.magic_signature, swap_magic,
<------><------><------><------>   ATH10K_SWAP_CODE_SEG_MAGIC_BYTES_SZ)) {
<------><------><------><------>ath10k_err(ar, "refusing an invalid swap file\n");
<------><------><------><------>return -EINVAL;
<------><------><------>}
<------><------><------>seg_info->target_addr =
<------><------><------><------>__le32_to_cpu(swap_item->tail.bmi_write_addr);
<------><------><------>break;
<------><------>}
 
<------><------>memcpy(virt_addr, swap_item->tlv.data, payload_len);
<------><------>virt_addr += payload_len;
<------><------>length = payload_len +  sizeof(struct ath10k_swap_code_seg_tlv);
<------><------>size_left -= length;
<------><------>fw_data += length;
<------><------>total_payload_len += payload_len;
<------>}
 
<------>if (seg_info->target_addr == -1) {
<------><------>ath10k_err(ar, "failed to parse invalid swap file\n");
<------><------>return -EINVAL;
<------>}
<------>seg_info->seg_hw_info.swap_size = __cpu_to_le32(total_payload_len);
 
<------>return 0;
}
 
static void
ath10k_swap_code_seg_free(struct ath10k *ar,
<------><------><------>  struct ath10k_swap_code_seg_info *seg_info)
{
<------>u32 seg_size;
 
<------>if (!seg_info)
<------><------>return;
 
<------>if (!seg_info->virt_address[0])
<------><------>return;
 
<------>seg_size = __le32_to_cpu(seg_info->seg_hw_info.size);
<------>dma_free_coherent(ar->dev, seg_size, seg_info->virt_address[0],
<------><------><------>  seg_info->paddr[0]);
}
 
static struct ath10k_swap_code_seg_info *
ath10k_swap_code_seg_alloc(struct ath10k *ar, size_t swap_bin_len)
{
<------>struct ath10k_swap_code_seg_info *seg_info;
<------>void *virt_addr;
<------>dma_addr_t paddr;
 
<------>swap_bin_len = roundup(swap_bin_len, 2);
<------>if (swap_bin_len > ATH10K_SWAP_CODE_SEG_BIN_LEN_MAX) {
<------><------>ath10k_err(ar, "refusing code swap bin because it is too big %zu > %d\n",
<------><------><------>   swap_bin_len, ATH10K_SWAP_CODE_SEG_BIN_LEN_MAX);
<------><------>return NULL;
<------>}
 
<------>seg_info = devm_kzalloc(ar->dev, sizeof(*seg_info), GFP_KERNEL);
<------>if (!seg_info)
<------><------>return NULL;
 
<------>virt_addr = dma_alloc_coherent(ar->dev, swap_bin_len, &paddr,
<------><------><------><------>       GFP_KERNEL);
<------>if (!virt_addr)
<------><------>return NULL;
 
<------>seg_info->seg_hw_info.bus_addr[0] = __cpu_to_le32(paddr);
<------>seg_info->seg_hw_info.size = __cpu_to_le32(swap_bin_len);
<------>seg_info->seg_hw_info.swap_size = __cpu_to_le32(swap_bin_len);
<------>seg_info->seg_hw_info.num_segs =
<------><------><------>__cpu_to_le32(ATH10K_SWAP_CODE_SEG_NUM_SUPPORTED);
<------>seg_info->seg_hw_info.size_log2 = __cpu_to_le32(ilog2(swap_bin_len));
<------>seg_info->virt_address[0] = virt_addr;
<------>seg_info->paddr[0] = paddr;
 
<------>return seg_info;
}
 
int ath10k_swap_code_seg_configure(struct ath10k *ar,
<------><------><------><------>   const struct ath10k_fw_file *fw_file)
{
<------>int ret;
<------>struct ath10k_swap_code_seg_info *seg_info = NULL;
 
<------>if (!fw_file->firmware_swap_code_seg_info)
<------><------>return 0;
 
<------>ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot found firmware code swap binary\n");
 
<------>seg_info = fw_file->firmware_swap_code_seg_info;
 
<------>ret = ath10k_bmi_write_memory(ar, seg_info->target_addr,
<------><------><------><------>      &seg_info->seg_hw_info,
<------><------><------><------>      sizeof(seg_info->seg_hw_info));
<------>if (ret) {
<------><------>ath10k_err(ar, "failed to write Code swap segment information (%d)\n",
<------><------><------>   ret);
<------><------>return ret;
<------>}
 
<------>return 0;
}
 
void ath10k_swap_code_seg_release(struct ath10k *ar,
<------><------><------><------>  struct ath10k_fw_file *fw_file)
{
<------>ath10k_swap_code_seg_free(ar, fw_file->firmware_swap_code_seg_info);
 
<------>/* FIXME: these two assignments look to bein wrong place! Shouldn't
<------> * they be in ath10k_core_free_firmware_files() like the rest?
<------> */
<------>fw_file->codeswap_data = NULL;
<------>fw_file->codeswap_len = 0;
 
<------>fw_file->firmware_swap_code_seg_info = NULL;
}
 
int ath10k_swap_code_seg_init(struct ath10k *ar, struct ath10k_fw_file *fw_file)
{
<------>int ret;
<------>struct ath10k_swap_code_seg_info *seg_info;
<------>const void *codeswap_data;
<------>size_t codeswap_len;
 
<------>codeswap_data = fw_file->codeswap_data;
<------>codeswap_len = fw_file->codeswap_len;
 
<------>if (!codeswap_len || !codeswap_data)
<------><------>return 0;
 
<------>seg_info = ath10k_swap_code_seg_alloc(ar, codeswap_len);
<------>if (!seg_info) {
<------><------>ath10k_err(ar, "failed to allocate fw code swap segment\n");
<------><------>return -ENOMEM;
<------>}
 
<------>ret = ath10k_swap_code_seg_fill(ar, seg_info,
<------><------><------><------><------>codeswap_data, codeswap_len);
 
<------>if (ret) {
<------><------>ath10k_warn(ar, "failed to initialize fw code swap segment: %d\n",
<------><------><------>    ret);
<------><------>ath10k_swap_code_seg_free(ar, seg_info);
<------><------>return ret;
<------>}
 
<------>fw_file->firmware_swap_code_seg_info = seg_info;
 
<------>return 0;
}