1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
new file mode 100644
index 000000000000..43d815cb3ce9
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
@@ -0,0 +1,231 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright (C) 2018 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <linuxwifi@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright (C) 2018 Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+
+#include <linux/firmware.h>
+#include "iwl-trans.h"
+#include "iwl-dbg-tlv.h"
+
+void iwl_fw_dbg_copy_tlv(struct iwl_trans *trans, struct iwl_ucode_tlv *tlv,
+			 bool ext)
+{
+	struct iwl_apply_point_data *data;
+	struct iwl_fw_ini_header *header = (void *)&tlv->data[0];
+	u32 apply_point = le32_to_cpu(header->apply_point);
+
+	int copy_size = le32_to_cpu(tlv->length) + sizeof(*tlv);
+
+	if (WARN_ONCE(apply_point >= IWL_FW_INI_APPLY_NUM,
+		      "Invalid apply point id %d\n", apply_point))
+		return;
+
+	if (ext)
+		data = &trans->apply_points_ext[apply_point];
+	else
+		data = &trans->apply_points[apply_point];
+
+	/*
+	 * Make sure we still have room to copy this TLV. Offset points to the
+	 * location the last copy ended.
+	 */
+	if (WARN_ONCE(data->offset + copy_size > data->size,
+		      "Not enough memory for apply point %d\n",
+		      apply_point))
+		return;
+
+	memcpy(data->data + data->offset, (void *)tlv, copy_size);
+	data->offset += copy_size;
+}
+
+void iwl_alloc_dbg_tlv(struct iwl_trans *trans, size_t len, const u8 *data,
+		       bool ext)
+{
+	struct iwl_ucode_tlv *tlv;
+	u32 size[IWL_FW_INI_APPLY_NUM] = {0};
+	int i;
+
+	while (len >= sizeof(*tlv)) {
+		u32 tlv_len, tlv_type, apply;
+		struct iwl_fw_ini_header *hdr;
+
+		len -= sizeof(*tlv);
+		tlv = (void *)data;
+
+		tlv_len = le32_to_cpu(tlv->length);
+		tlv_type = le32_to_cpu(tlv->type);
+
+		if (len < tlv_len)
+			return;
+
+		len -= ALIGN(tlv_len, 4);
+		data += sizeof(*tlv) + ALIGN(tlv_len, 4);
+
+		if (!(tlv_type & IWL_UCODE_INI_TLV_GROUP))
+			continue;
+
+		hdr = (void *)&tlv->data[0];
+		apply = le32_to_cpu(hdr->apply_point);
+
+		IWL_DEBUG_FW(trans, "Read TLV %x, apply point %d\n",
+			     le32_to_cpu(tlv->type), apply);
+
+		if (WARN_ON(apply >= IWL_FW_INI_APPLY_NUM))
+			continue;
+
+		size[apply] += sizeof(*tlv) + tlv_len;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(size); i++) {
+		void *mem;
+
+		if (!size[i])
+			continue;
+
+		mem = kzalloc(size[i], GFP_KERNEL);
+
+		if (!mem) {
+			IWL_ERR(trans, "No memory for apply point %d\n", i);
+			return;
+		}
+
+		if (ext) {
+			trans->apply_points_ext[i].data = mem;
+			trans->apply_points_ext[i].size = size[i];
+		} else {
+			trans->apply_points[i].data = mem;
+			trans->apply_points[i].size = size[i];
+		}
+
+		trans->ini_valid = true;
+	}
+}
+
+void iwl_fw_dbg_free(struct iwl_trans *trans)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(trans->apply_points); i++) {
+		kfree(trans->apply_points[i].data);
+		trans->apply_points[i].size = 0;
+		trans->apply_points[i].offset = 0;
+
+		kfree(trans->apply_points_ext[i].data);
+		trans->apply_points_ext[i].size = 0;
+		trans->apply_points_ext[i].offset = 0;
+	}
+}
+
+static int iwl_parse_fw_dbg_tlv(struct iwl_trans *trans, const u8 *data,
+				size_t len)
+{
+	struct iwl_ucode_tlv *tlv;
+	enum iwl_ucode_tlv_type tlv_type;
+	u32 tlv_len;
+
+	while (len >= sizeof(*tlv)) {
+		len -= sizeof(*tlv);
+		tlv = (void *)data;
+
+		tlv_len = le32_to_cpu(tlv->length);
+		tlv_type = le32_to_cpu(tlv->type);
+
+		if (len < tlv_len) {
+			IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
+				len, tlv_len);
+			return -EINVAL;
+		}
+		len -= ALIGN(tlv_len, 4);
+		data += sizeof(*tlv) + ALIGN(tlv_len, 4);
+
+		switch (tlv_type) {
+		case IWL_UCODE_TLV_TYPE_BUFFER_ALLOCATION:
+		case IWL_UCODE_TLV_TYPE_HCMD:
+		case IWL_UCODE_TLV_TYPE_REGIONS:
+		case IWL_UCODE_TLV_TYPE_TRIGGERS:
+		case IWL_UCODE_TLV_TYPE_DEBUG_FLOW:
+			iwl_fw_dbg_copy_tlv(trans, tlv, true);
+			break;
+		default:
+			WARN_ONCE(1, "Invalid TLV %x\n", tlv_type);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+void iwl_load_fw_dbg_tlv(struct device *dev, struct iwl_trans *trans)
+{
+	const struct firmware *fw;
+	int res;
+
+	if (trans->external_ini_loaded || !iwlwifi_mod_params.enable_ini)
+		return;
+
+	res = request_firmware(&fw, "iwl-dbg-tlv.ini", dev);
+	if (res)
+		return;
+
+	iwl_alloc_dbg_tlv(trans, fw->size, fw->data, true);
+	iwl_parse_fw_dbg_tlv(trans, fw->data, fw->size);
+
+	trans->external_ini_loaded = true;
+	release_firmware(fw);
+}