diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/swap.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/swap.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/swap.c b/drivers/net/wireless/ath/ath10k/swap.c new file mode 100644 index 0000000..adf4592 --- /dev/null +++ b/drivers/net/wireless/ath/ath10k/swap.c @@ -0,0 +1,208 @@ +/* + * Copyright (c) 2015 Qualcomm Atheros, Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* 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) { + ath10k_err(ar, "failed to allocate dma coherent memory\n"); + 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; +} |