File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/net/wireless/ath/ath10k/swap.c b/drivers/net/wireless/ath/ath10k/swap.c
new file mode 100644
index 0000000..3ca3fae
--- /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,
+ enum ath10k_swap_code_seg_bin_type type)
+{
+ int ret;
+ struct ath10k_swap_code_seg_info *seg_info = NULL;
+
+ switch (type) {
+ case ATH10K_SWAP_CODE_SEG_BIN_TYPE_FW:
+ if (!ar->swap.firmware_swap_code_seg_info)
+ return 0;
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot found firmware code swap binary\n");
+ seg_info = ar->swap.firmware_swap_code_seg_info;
+ break;
+ default:
+ case ATH10K_SWAP_CODE_SEG_BIN_TYPE_OTP:
+ case ATH10K_SWAP_CODE_SEG_BIN_TYPE_UTF:
+ ath10k_warn(ar, "ignoring unknown code swap binary type %d\n",
+ type);
+ return 0;
+ }
+
+ 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)
+{
+ ath10k_swap_code_seg_free(ar, ar->swap.firmware_swap_code_seg_info);
+ ar->swap.firmware_codeswap_data = NULL;
+ ar->swap.firmware_codeswap_len = 0;
+ ar->swap.firmware_swap_code_seg_info = NULL;
+}
+
+int ath10k_swap_code_seg_init(struct ath10k *ar)
+{
+ int ret;
+ struct ath10k_swap_code_seg_info *seg_info;
+
+ if (!ar->swap.firmware_codeswap_len || !ar->swap.firmware_codeswap_data)
+ return 0;
+
+ seg_info = ath10k_swap_code_seg_alloc(ar,
+ ar->swap.firmware_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,
+ ar->swap.firmware_codeswap_data,
+ ar->swap.firmware_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;
+ }
+
+ ar->swap.firmware_swap_code_seg_info = seg_info;
+
+ return 0;
+}