iwlwifi: dump smem configuration when firmware crashes

Add the smem configuration to the fw data dump, once
the firmware crashes. This is useful mainly for later
parsing of the smem.
Signed-off-by: Golan Ben-Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/dbg.c

@@ -545,11 +545,13 @@ void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt)
 	struct iwl_fw_error_dump_data *dump_data;
 	struct iwl_fw_error_dump_info *dump_info;
 	struct iwl_fw_error_dump_mem *dump_mem;
+	struct iwl_fw_error_dump_smem_cfg *dump_smem_cfg;
 	struct iwl_fw_error_dump_trigger_desc *dump_trig;
 	struct iwl_fw_dump_ptrs *fw_error_dump;
 	struct scatterlist *sg_dump_data;
 	u32 sram_len, sram_ofs;
 	const struct iwl_fw_dbg_mem_seg_tlv *fw_dbg_mem = fwrt->fw->dbg_mem_tlv;
+	struct iwl_fwrt_shared_mem_cfg *mem_cfg = &fwrt->smem_cfg;
 	u32 file_len, fifo_data_len = 0, prph_len = 0, radio_len = 0;
 	u32 smem_len = fwrt->fw->n_dbg_mem_tlv ? 0 : fwrt->trans->cfg->smem_len;
 	u32 sram2_len = fwrt->fw->n_dbg_mem_tlv ?
@@ -585,8 +587,6 @@ void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt)
 
 	/* reading RXF/TXF sizes */
 	if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status)) {
-		struct iwl_fwrt_shared_mem_cfg *mem_cfg = &fwrt->smem_cfg;
-
 		fifo_data_len = 0;
 
 		/* Count RXF2 size */
@@ -675,7 +675,8 @@ void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt)
 	}
 
 	file_len = sizeof(*dump_file) +
-		   sizeof(*dump_data) * 2 +
+		   sizeof(*dump_data) * 3 +
+		   sizeof(*dump_smem_cfg) +
 		   fifo_data_len +
 		   prph_len +
 		   radio_len +
@@ -706,8 +707,8 @@ void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt)
 
 	/* If we only want a monitor dump, reset the file length */
 	if (monitor_dump_only) {
-		file_len = sizeof(*dump_file) + sizeof(*dump_data) +
-			   sizeof(*dump_info);
+		file_len = sizeof(*dump_file) + sizeof(*dump_data) * 2 +
+			   sizeof(*dump_info) + sizeof(*dump_smem_cfg);
 	}
 
 	if (fwrt->dump.desc)
@@ -744,6 +745,33 @@ void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt)
 		sizeof(dump_info->bus_human_readable));
 
 	dump_data = iwl_fw_error_next_data(dump_data);
+
+	/* Dump shared memory configuration */
+	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_CFG);
+	dump_data->len = cpu_to_le32(sizeof(*dump_smem_cfg));
+	dump_smem_cfg = (void *)dump_data->data;
+	dump_smem_cfg->num_lmacs = cpu_to_le32(mem_cfg->num_lmacs);
+	dump_smem_cfg->num_txfifo_entries =
+		cpu_to_le32(mem_cfg->num_txfifo_entries);
+	for (i = 0; i < MAX_NUM_LMAC; i++) {
+		int j;
+
+		for (j = 0; j < TX_FIFO_MAX_NUM; j++)
+			dump_smem_cfg->lmac[i].txfifo_size[j] =
+				cpu_to_le32(mem_cfg->lmac[i].txfifo_size[j]);
+		dump_smem_cfg->lmac[i].rxfifo1_size =
+			cpu_to_le32(mem_cfg->lmac[i].rxfifo1_size);
+	}
+	dump_smem_cfg->rxfifo2_size = cpu_to_le32(mem_cfg->rxfifo2_size);
+	dump_smem_cfg->internal_txfifo_addr =
+		cpu_to_le32(mem_cfg->internal_txfifo_addr);
+	for (i = 0; i < TX_FIFO_INTERNAL_MAX_NUM; i++) {
+		dump_smem_cfg->internal_txfifo_size[i] =
+			cpu_to_le32(mem_cfg->internal_txfifo_size[i]);
+	}
+
+	dump_data = iwl_fw_error_next_data(dump_data);
+
 	/* We only dump the FIFOs if the FW is in error state */
 	if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status)) {
 		iwl_fw_dump_fifos(fwrt, &dump_data);

drivers/net/wireless/intel/iwlwifi/fw/error-dump.h

@@ -7,6 +7,7 @@
  *
  * Copyright(c) 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2014 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  *
  * 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
@@ -33,6 +34,7 @@
  *
  * Copyright(c) 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2014 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -92,6 +94,9 @@
  * @IWL_FW_ERROR_DUMP_EXTERNAL: used only by external code utilities, and
  *	for that reason is not in use in any other place in the Linux Wi-Fi
  *	stack.
+ * @IWL_FW_ERROR_DUMP_MEM_CFG: the addresses and sizes of fifos in the smem,
+ *	which we get from the fw after ALIVE. The content is structured as
+ *	&struct iwl_fw_error_dump_smem_cfg.
  */
 enum iwl_fw_error_dump_type {
 	/* 0 is deprecated */
@@ -110,6 +115,7 @@ enum iwl_fw_error_dump_type {
 	IWL_FW_ERROR_DUMP_RADIO_REG = 13,
 	IWL_FW_ERROR_DUMP_INTERNAL_TXF = 14,
 	IWL_FW_ERROR_DUMP_EXTERNAL = 15, /* Do not move */
+	IWL_FW_ERROR_DUMP_MEM_CFG = 16,
 
 	IWL_FW_ERROR_DUMP_MAX,
 };
@@ -208,6 +214,30 @@ struct iwl_fw_error_dump_fw_mon {
 	u8 data[];
 } __packed;
 
+#define MAX_NUM_LMAC 2
+#define TX_FIFO_INTERNAL_MAX_NUM	6
+#define TX_FIFO_MAX_NUM			15
+/**
+ * struct iwl_fw_error_dump_smem_cfg - Dump SMEM configuration
+ *	This must follow &struct iwl_fwrt_shared_mem_cfg.
+ * @num_lmacs: number of lmacs
+ * @num_txfifo_entries: number of tx fifos
+ * @lmac: sizes of lmacs txfifos and rxfifo1
+ * @rxfifo2_size: size of rxfifo2
+ * @internal_txfifo_addr: address of internal tx fifo
+ * @internal_txfifo_size: size of internal tx fifo
+ */
+struct iwl_fw_error_dump_smem_cfg {
+	__le32 num_lmacs;
+	__le32 num_txfifo_entries;
+	struct {
+		__le32 txfifo_size[TX_FIFO_MAX_NUM];
+		__le32 rxfifo1_size;
+	} lmac[MAX_NUM_LMAC];
+	__le32 rxfifo2_size;
+	__le32 internal_txfifo_addr;
+	__le32 internal_txfifo_size[TX_FIFO_INTERNAL_MAX_NUM];
+} __packed;
 /**
  * struct iwl_fw_error_dump_prph - periphery registers data
  * @prph_start: address of the first register in this chunk

drivers/net/wireless/intel/iwlwifi/fw/smem.c

@@ -113,6 +113,9 @@ static void iwl_parse_shared_mem(struct iwl_fw_runtime *fwrt,
 		BUILD_BUG_ON(sizeof(fwrt->smem_cfg.internal_txfifo_size) !=
 			     sizeof(mem_cfg->internal_txfifo_size));
 
+		fwrt->smem_cfg.internal_txfifo_addr =
+			le32_to_cpu(mem_cfg->internal_txfifo_addr);
+
 		for (i = 0;
 		     i < ARRAY_SIZE(fwrt->smem_cfg.internal_txfifo_size);
 		     i++)