Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 000000000..e7f57efad
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/swap.c
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2015-2016 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;
+}