209 lines
6 KiB
C
209 lines
6 KiB
C
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/*
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* Copyright (c) 2015-2016 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* This file has implementation for code swap logic. With code swap feature,
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* target can run the fw binary with even smaller IRAM size by using host
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* memory to store some of the code segments.
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*/
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#include "core.h"
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#include "bmi.h"
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#include "debug.h"
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static int ath10k_swap_code_seg_fill(struct ath10k *ar,
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struct ath10k_swap_code_seg_info *seg_info,
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const void *data, size_t data_len)
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{
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u8 *virt_addr = seg_info->virt_address[0];
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u8 swap_magic[ATH10K_SWAP_CODE_SEG_MAGIC_BYTES_SZ] = {};
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const u8 *fw_data = data;
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union ath10k_swap_code_seg_item *swap_item;
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u32 length = 0;
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u32 payload_len;
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u32 total_payload_len = 0;
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u32 size_left = data_len;
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/* Parse swap bin and copy the content to host allocated memory.
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* The format is Address, length and value. The last 4-bytes is
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* target write address. Currently address field is not used.
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*/
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seg_info->target_addr = -1;
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while (size_left >= sizeof(*swap_item)) {
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swap_item = (union ath10k_swap_code_seg_item *)fw_data;
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payload_len = __le32_to_cpu(swap_item->tlv.length);
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if ((payload_len > size_left) ||
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(payload_len == 0 &&
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size_left != sizeof(struct ath10k_swap_code_seg_tail))) {
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ath10k_err(ar, "refusing to parse invalid tlv length %d\n",
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payload_len);
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return -EINVAL;
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}
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if (payload_len == 0) {
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if (memcmp(swap_item->tail.magic_signature, swap_magic,
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ATH10K_SWAP_CODE_SEG_MAGIC_BYTES_SZ)) {
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ath10k_err(ar, "refusing an invalid swap file\n");
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return -EINVAL;
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}
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seg_info->target_addr =
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__le32_to_cpu(swap_item->tail.bmi_write_addr);
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break;
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}
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memcpy(virt_addr, swap_item->tlv.data, payload_len);
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virt_addr += payload_len;
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length = payload_len + sizeof(struct ath10k_swap_code_seg_tlv);
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size_left -= length;
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fw_data += length;
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total_payload_len += payload_len;
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}
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if (seg_info->target_addr == -1) {
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ath10k_err(ar, "failed to parse invalid swap file\n");
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return -EINVAL;
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}
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seg_info->seg_hw_info.swap_size = __cpu_to_le32(total_payload_len);
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return 0;
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}
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static void
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ath10k_swap_code_seg_free(struct ath10k *ar,
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struct ath10k_swap_code_seg_info *seg_info)
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{
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u32 seg_size;
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if (!seg_info)
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return;
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if (!seg_info->virt_address[0])
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return;
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seg_size = __le32_to_cpu(seg_info->seg_hw_info.size);
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dma_free_coherent(ar->dev, seg_size, seg_info->virt_address[0],
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seg_info->paddr[0]);
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}
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static struct ath10k_swap_code_seg_info *
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ath10k_swap_code_seg_alloc(struct ath10k *ar, size_t swap_bin_len)
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{
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struct ath10k_swap_code_seg_info *seg_info;
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void *virt_addr;
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dma_addr_t paddr;
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swap_bin_len = roundup(swap_bin_len, 2);
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if (swap_bin_len > ATH10K_SWAP_CODE_SEG_BIN_LEN_MAX) {
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ath10k_err(ar, "refusing code swap bin because it is too big %zu > %d\n",
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swap_bin_len, ATH10K_SWAP_CODE_SEG_BIN_LEN_MAX);
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return NULL;
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}
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seg_info = devm_kzalloc(ar->dev, sizeof(*seg_info), GFP_KERNEL);
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if (!seg_info)
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return NULL;
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virt_addr = dma_alloc_coherent(ar->dev, swap_bin_len, &paddr,
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GFP_KERNEL);
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if (!virt_addr) {
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ath10k_err(ar, "failed to allocate dma coherent memory\n");
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return NULL;
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}
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seg_info->seg_hw_info.bus_addr[0] = __cpu_to_le32(paddr);
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seg_info->seg_hw_info.size = __cpu_to_le32(swap_bin_len);
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seg_info->seg_hw_info.swap_size = __cpu_to_le32(swap_bin_len);
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seg_info->seg_hw_info.num_segs =
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__cpu_to_le32(ATH10K_SWAP_CODE_SEG_NUM_SUPPORTED);
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seg_info->seg_hw_info.size_log2 = __cpu_to_le32(ilog2(swap_bin_len));
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seg_info->virt_address[0] = virt_addr;
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seg_info->paddr[0] = paddr;
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return seg_info;
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}
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int ath10k_swap_code_seg_configure(struct ath10k *ar,
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const struct ath10k_fw_file *fw_file)
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{
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int ret;
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struct ath10k_swap_code_seg_info *seg_info = NULL;
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if (!fw_file->firmware_swap_code_seg_info)
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return 0;
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ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot found firmware code swap binary\n");
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seg_info = fw_file->firmware_swap_code_seg_info;
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ret = ath10k_bmi_write_memory(ar, seg_info->target_addr,
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&seg_info->seg_hw_info,
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sizeof(seg_info->seg_hw_info));
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if (ret) {
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ath10k_err(ar, "failed to write Code swap segment information (%d)\n",
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ret);
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return ret;
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}
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return 0;
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}
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void ath10k_swap_code_seg_release(struct ath10k *ar,
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struct ath10k_fw_file *fw_file)
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{
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ath10k_swap_code_seg_free(ar, fw_file->firmware_swap_code_seg_info);
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/* FIXME: these two assignments look to bein wrong place! Shouldn't
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* they be in ath10k_core_free_firmware_files() like the rest?
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*/
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fw_file->codeswap_data = NULL;
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fw_file->codeswap_len = 0;
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fw_file->firmware_swap_code_seg_info = NULL;
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}
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int ath10k_swap_code_seg_init(struct ath10k *ar, struct ath10k_fw_file *fw_file)
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{
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int ret;
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struct ath10k_swap_code_seg_info *seg_info;
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const void *codeswap_data;
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size_t codeswap_len;
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codeswap_data = fw_file->codeswap_data;
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codeswap_len = fw_file->codeswap_len;
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if (!codeswap_len || !codeswap_data)
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return 0;
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seg_info = ath10k_swap_code_seg_alloc(ar, codeswap_len);
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if (!seg_info) {
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ath10k_err(ar, "failed to allocate fw code swap segment\n");
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return -ENOMEM;
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}
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ret = ath10k_swap_code_seg_fill(ar, seg_info,
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codeswap_data, codeswap_len);
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if (ret) {
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ath10k_warn(ar, "failed to initialize fw code swap segment: %d\n",
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ret);
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ath10k_swap_code_seg_free(ar, seg_info);
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return ret;
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}
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fw_file->firmware_swap_code_seg_info = seg_info;
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return 0;
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}
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