linux_kernel/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c

/******************************************************************************
 *
 * 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) 2008 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2015        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
 * 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) 2005 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2015        Intel Deutschland GmbH
 * 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/devcoredump.h>

#include "fw-dbg.h"
#include "iwl-io.h"
#include "mvm.h"
#include "iwl-prph.h"
#include "iwl-csr.h"

static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
				     const void *data, size_t datalen)
{
	const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
	ssize_t bytes_read;
	ssize_t bytes_read_trans;

	if (offset < dump_ptrs->op_mode_len) {
		bytes_read = min_t(ssize_t, count,
				   dump_ptrs->op_mode_len - offset);
		memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
		       bytes_read);
		offset += bytes_read;
		count -= bytes_read;

		if (count == 0)
			return bytes_read;
	} else {
		bytes_read = 0;
	}

	if (!dump_ptrs->trans_ptr)
		return bytes_read;

	offset -= dump_ptrs->op_mode_len;
	bytes_read_trans = min_t(ssize_t, count,
				 dump_ptrs->trans_ptr->len - offset);
	memcpy(buffer + bytes_read,
	       (u8 *)dump_ptrs->trans_ptr->data + offset,
	       bytes_read_trans);

	return bytes_read + bytes_read_trans;
}

static void iwl_mvm_free_coredump(const void *data)
{
	const struct iwl_mvm_dump_ptrs *fw_error_dump = data;

	vfree(fw_error_dump->op_mode_ptr);
	vfree(fw_error_dump->trans_ptr);
	kfree(fw_error_dump);
}

static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
			       struct iwl_fw_error_dump_data **dump_data)
{
	struct iwl_fw_error_dump_fifo *fifo_hdr;
	u32 *fifo_data;
	u32 fifo_len;
	unsigned long flags;
	int i, j;

	if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
		return;

	/* Pull RXF data from all RXFs */
	for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
		/*
		 * Keep aside the additional offset that might be needed for
		 * next RXF
		 */
		u32 offset_diff = RXF_DIFF_FROM_PREV * i;

		fifo_hdr = (void *)(*dump_data)->data;
		fifo_data = (void *)fifo_hdr->data;
		fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];

		/* No need to try to read the data if the length is 0 */
		if (fifo_len == 0)
			continue;

		/* Add a TLV for the RXF */
		(*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
		(*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));

		fifo_hdr->fifo_num = cpu_to_le32(i);
		fifo_hdr->available_bytes =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_D_SPACE +
							offset_diff));
		fifo_hdr->wr_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_WR_PTR +
							offset_diff));
		fifo_hdr->rd_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_RD_PTR +
							offset_diff));
		fifo_hdr->fence_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_FENCE_PTR +
							offset_diff));
		fifo_hdr->fence_mode =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_SET_FENCE_MODE +
							offset_diff));

		/* Lock fence */
		iwl_trans_write_prph(mvm->trans,
				     RXF_SET_FENCE_MODE + offset_diff, 0x1);
		/* Set fence pointer to the same place like WR pointer */
		iwl_trans_write_prph(mvm->trans,
				     RXF_LD_WR2FENCE + offset_diff, 0x1);
		/* Set fence offset */
		iwl_trans_write_prph(mvm->trans,
				     RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
				     0x0);

		/* Read FIFO */
		fifo_len /= sizeof(u32); /* Size in DWORDS */
		for (j = 0; j < fifo_len; j++)
			fifo_data[j] = iwl_trans_read_prph(mvm->trans,
							 RXF_FIFO_RD_FENCE_INC +
							 offset_diff);
		*dump_data = iwl_fw_error_next_data(*dump_data);
	}

	/* Pull TXF data from all TXFs */
	for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
		/* Mark the number of TXF we're pulling now */
		iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);

		fifo_hdr = (void *)(*dump_data)->data;
		fifo_data = (void *)fifo_hdr->data;
		fifo_len = mvm->shared_mem_cfg.txfifo_size[i];

		/* No need to try to read the data if the length is 0 */
		if (fifo_len == 0)
			continue;

		/* Add a TLV for the FIFO */
		(*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
		(*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));

		fifo_hdr->fifo_num = cpu_to_le32(i);
		fifo_hdr->available_bytes =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_FIFO_ITEM_CNT));
		fifo_hdr->wr_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_WR_PTR));
		fifo_hdr->rd_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_RD_PTR));
		fifo_hdr->fence_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_FENCE_PTR));
		fifo_hdr->fence_mode =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_LOCK_FENCE));

		/* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
		iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
				     TXF_WR_PTR);

		/* Dummy-read to advance the read pointer to the head */
		iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);

		/* Read FIFO */
		fifo_len /= sizeof(u32); /* Size in DWORDS */
		for (j = 0; j < fifo_len; j++)
			fifo_data[j] = iwl_trans_read_prph(mvm->trans,
							  TXF_READ_MODIFY_DATA);
		*dump_data = iwl_fw_error_next_data(*dump_data);
	}

	iwl_trans_release_nic_access(mvm->trans, &flags);
}

void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
{
	if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
	    !mvm->fw_dump_desc)
		return;

	kfree(mvm->fw_dump_desc);
	mvm->fw_dump_desc = NULL;
}

#define IWL8260_ICCM_OFFSET		0x44000 /* Only for B-step */
#define IWL8260_ICCM_LEN		0xC000 /* Only for B-step */

static const struct {
	u32 start, end;
} iwl_prph_dump_addr[] = {
	{ .start = 0x00a00000, .end = 0x00a00000 },
	{ .start = 0x00a0000c, .end = 0x00a00024 },
	{ .start = 0x00a0002c, .end = 0x00a0003c },
	{ .start = 0x00a00410, .end = 0x00a00418 },
	{ .start = 0x00a00420, .end = 0x00a00420 },
	{ .start = 0x00a00428, .end = 0x00a00428 },
	{ .start = 0x00a00430, .end = 0x00a0043c },
	{ .start = 0x00a00444, .end = 0x00a00444 },
	{ .start = 0x00a004c0, .end = 0x00a004cc },
	{ .start = 0x00a004d8, .end = 0x00a004d8 },
	{ .start = 0x00a004e0, .end = 0x00a004f0 },
	{ .start = 0x00a00840, .end = 0x00a00840 },
	{ .start = 0x00a00850, .end = 0x00a00858 },
	{ .start = 0x00a01004, .end = 0x00a01008 },
	{ .start = 0x00a01010, .end = 0x00a01010 },
	{ .start = 0x00a01018, .end = 0x00a01018 },
	{ .start = 0x00a01024, .end = 0x00a01024 },
	{ .start = 0x00a0102c, .end = 0x00a01034 },
	{ .start = 0x00a0103c, .end = 0x00a01040 },
	{ .start = 0x00a01048, .end = 0x00a01094 },
	{ .start = 0x00a01c00, .end = 0x00a01c20 },
	{ .start = 0x00a01c58, .end = 0x00a01c58 },
	{ .start = 0x00a01c7c, .end = 0x00a01c7c },
	{ .start = 0x00a01c28, .end = 0x00a01c54 },
	{ .start = 0x00a01c5c, .end = 0x00a01c5c },
	{ .start = 0x00a01c60, .end = 0x00a01cdc },
	{ .start = 0x00a01ce0, .end = 0x00a01d0c },
	{ .start = 0x00a01d18, .end = 0x00a01d20 },
	{ .start = 0x00a01d2c, .end = 0x00a01d30 },
	{ .start = 0x00a01d40, .end = 0x00a01d5c },
	{ .start = 0x00a01d80, .end = 0x00a01d80 },
	{ .start = 0x00a01d98, .end = 0x00a01d9c },
	{ .start = 0x00a01da8, .end = 0x00a01da8 },
	{ .start = 0x00a01db8, .end = 0x00a01df4 },
	{ .start = 0x00a01dc0, .end = 0x00a01dfc },
	{ .start = 0x00a01e00, .end = 0x00a01e2c },
	{ .start = 0x00a01e40, .end = 0x00a01e60 },
	{ .start = 0x00a01e68, .end = 0x00a01e6c },
	{ .start = 0x00a01e74, .end = 0x00a01e74 },
	{ .start = 0x00a01e84, .end = 0x00a01e90 },
	{ .start = 0x00a01e9c, .end = 0x00a01ec4 },
	{ .start = 0x00a01ed0, .end = 0x00a01ee0 },
	{ .start = 0x00a01f00, .end = 0x00a01f1c },
	{ .start = 0x00a01f44, .end = 0x00a01ffc },
	{ .start = 0x00a02000, .end = 0x00a02048 },
	{ .start = 0x00a02068, .end = 0x00a020f0 },
	{ .start = 0x00a02100, .end = 0x00a02118 },
	{ .start = 0x00a02140, .end = 0x00a0214c },
	{ .start = 0x00a02168, .end = 0x00a0218c },
	{ .start = 0x00a021c0, .end = 0x00a021c0 },
	{ .start = 0x00a02400, .end = 0x00a02410 },
	{ .start = 0x00a02418, .end = 0x00a02420 },
	{ .start = 0x00a02428, .end = 0x00a0242c },
	{ .start = 0x00a02434, .end = 0x00a02434 },
	{ .start = 0x00a02440, .end = 0x00a02460 },
	{ .start = 0x00a02468, .end = 0x00a024b0 },
	{ .start = 0x00a024c8, .end = 0x00a024cc },
	{ .start = 0x00a02500, .end = 0x00a02504 },
	{ .start = 0x00a0250c, .end = 0x00a02510 },
	{ .start = 0x00a02540, .end = 0x00a02554 },
	{ .start = 0x00a02580, .end = 0x00a025f4 },
	{ .start = 0x00a02600, .end = 0x00a0260c },
	{ .start = 0x00a02648, .end = 0x00a02650 },
	{ .start = 0x00a02680, .end = 0x00a02680 },
	{ .start = 0x00a026c0, .end = 0x00a026d0 },
	{ .start = 0x00a02700, .end = 0x00a0270c },
	{ .start = 0x00a02804, .end = 0x00a02804 },
	{ .start = 0x00a02818, .end = 0x00a0281c },
	{ .start = 0x00a02c00, .end = 0x00a02db4 },
	{ .start = 0x00a02df4, .end = 0x00a02fb0 },
	{ .start = 0x00a03000, .end = 0x00a03014 },
	{ .start = 0x00a0301c, .end = 0x00a0302c },
	{ .start = 0x00a03034, .end = 0x00a03038 },
	{ .start = 0x00a03040, .end = 0x00a03048 },
	{ .start = 0x00a03060, .end = 0x00a03068 },
	{ .start = 0x00a03070, .end = 0x00a03074 },
	{ .start = 0x00a0307c, .end = 0x00a0307c },
	{ .start = 0x00a03080, .end = 0x00a03084 },
	{ .start = 0x00a0308c, .end = 0x00a03090 },
	{ .start = 0x00a03098, .end = 0x00a03098 },
	{ .start = 0x00a030a0, .end = 0x00a030a0 },
	{ .start = 0x00a030a8, .end = 0x00a030b4 },
	{ .start = 0x00a030bc, .end = 0x00a030bc },
	{ .start = 0x00a030c0, .end = 0x00a0312c },
	{ .start = 0x00a03c00, .end = 0x00a03c5c },
	{ .start = 0x00a04400, .end = 0x00a04454 },
	{ .start = 0x00a04460, .end = 0x00a04474 },
	{ .start = 0x00a044c0, .end = 0x00a044ec },
	{ .start = 0x00a04500, .end = 0x00a04504 },
	{ .start = 0x00a04510, .end = 0x00a04538 },
	{ .start = 0x00a04540, .end = 0x00a04548 },
	{ .start = 0x00a04560, .end = 0x00a0457c },
	{ .start = 0x00a04590, .end = 0x00a04598 },
	{ .start = 0x00a045c0, .end = 0x00a045f4 },
};

static u32 iwl_dump_prph(struct iwl_trans *trans,
			 struct iwl_fw_error_dump_data **data)
{
	struct iwl_fw_error_dump_prph *prph;
	unsigned long flags;
	u32 prph_len = 0, i;

	if (!iwl_trans_grab_nic_access(trans, false, &flags))
		return 0;

	for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr); i++) {
		/* The range includes both boundaries */
		int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
			 iwl_prph_dump_addr[i].start + 4;
		int reg;
		__le32 *val;

		prph_len += sizeof(**data) + sizeof(*prph) + num_bytes_in_chunk;

		(*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PRPH);
		(*data)->len = cpu_to_le32(sizeof(*prph) +
					num_bytes_in_chunk);
		prph = (void *)(*data)->data;
		prph->prph_start = cpu_to_le32(iwl_prph_dump_addr[i].start);
		val = (void *)prph->data;

		for (reg = iwl_prph_dump_addr[i].start;
		     reg <= iwl_prph_dump_addr[i].end;
		     reg += 4)
			*val++ = cpu_to_le32(iwl_read_prph_no_grab(trans,
								   reg));

		*data = iwl_fw_error_next_data(*data);
	}

	iwl_trans_release_nic_access(trans, &flags);

	return prph_len;
}

void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
{
	struct iwl_fw_error_dump_file *dump_file;
	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_trigger_desc *dump_trig;
	struct iwl_mvm_dump_ptrs *fw_error_dump;
	u32 sram_len, sram_ofs;
	u32 file_len, fifo_data_len = 0;
	u32 smem_len = mvm->cfg->smem_len;
	u32 sram2_len = mvm->cfg->dccm2_len;
	bool monitor_dump_only = false;
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* there's no point in fw dump if the bus is dead */
	if (test_bit(STATUS_TRANS_DEAD, &mvm->trans->status)) {
		IWL_ERR(mvm, "Skip fw error dump since bus is dead\n");
		return;
	}

	if (mvm->fw_dump_trig &&
	    mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
		monitor_dump_only = true;

	fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
	if (!fw_error_dump)
		return;

	/* SRAM - include stack CCM if driver knows the values for it */
	if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
		const struct fw_img *img;

		img = &mvm->fw->img[mvm->cur_ucode];
		sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
		sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
	} else {
		sram_ofs = mvm->cfg->dccm_offset;
		sram_len = mvm->cfg->dccm_len;
	}

	/* reading RXF/TXF sizes */
	if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
		struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;

		fifo_data_len = 0;

		/* Count RXF size */
		for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
			if (!mem_cfg->rxfifo_size[i])
				continue;

			/* Add header info */
			fifo_data_len += mem_cfg->rxfifo_size[i] +
					 sizeof(*dump_data) +
					 sizeof(struct iwl_fw_error_dump_fifo);
		}

		for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
			if (!mem_cfg->txfifo_size[i])
				continue;

			/* Add header info */
			fifo_data_len += mem_cfg->txfifo_size[i] +
					 sizeof(*dump_data) +
					 sizeof(struct iwl_fw_error_dump_fifo);
		}
	}

	file_len = sizeof(*dump_file) +
		   sizeof(*dump_data) * 2 +
		   sram_len + sizeof(*dump_mem) +
		   fifo_data_len +
		   sizeof(*dump_info);

	/* Make room for the SMEM, if it exists */
	if (smem_len)
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;

	/* Make room for the secondary SRAM, if it exists */
	if (sram2_len)
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;

	/* Make room for fw's virtual image pages, if it exists */
	if (mvm->fw->img[mvm->cur_ucode].paging_mem_size)
		file_len += mvm->num_of_paging_blk *
			(sizeof(*dump_data) +
			 sizeof(struct iwl_fw_error_dump_paging) +
			 PAGING_BLOCK_SIZE);

	/* 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);
	}

	/* Make room for PRPH registers */
	for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr); i++) {
		/* The range includes both boundaries */
		int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
			iwl_prph_dump_addr[i].start + 4;

		file_len += sizeof(*dump_data) +
			sizeof(struct iwl_fw_error_dump_prph) +
			num_bytes_in_chunk;
	}

	/*
	 * In 8000 HW family B-step include the ICCM (which resides separately)
	 */
	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
	    CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
			    IWL8260_ICCM_LEN;

	if (mvm->fw_dump_desc)
		file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
			    mvm->fw_dump_desc->len;

	dump_file = vzalloc(file_len);
	if (!dump_file) {
		kfree(fw_error_dump);
		iwl_mvm_free_fw_dump_desc(mvm);
		return;
	}

	fw_error_dump->op_mode_ptr = dump_file;

	dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
	dump_data = (void *)dump_file->data;

	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
	dump_data->len = cpu_to_le32(sizeof(*dump_info));
	dump_info = (void *)dump_data->data;
	dump_info->device_family =
		mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
			cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
			cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
	dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
	memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
	       sizeof(dump_info->fw_human_readable));
	strncpy(dump_info->dev_human_readable, mvm->cfg->name,
		sizeof(dump_info->dev_human_readable));
	strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
		sizeof(dump_info->bus_human_readable));

	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, &mvm->trans->status))
		iwl_mvm_dump_fifos(mvm, &dump_data);

	if (mvm->fw_dump_desc) {
		dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
		dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
					     mvm->fw_dump_desc->len);
		dump_trig = (void *)dump_data->data;
		memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
		       sizeof(*dump_trig) + mvm->fw_dump_desc->len);

		/* now we can free this copy */
		iwl_mvm_free_fw_dump_desc(mvm);
		dump_data = iwl_fw_error_next_data(dump_data);
	}

	/* In case we only want monitor dump, skip to dump trasport data */
	if (monitor_dump_only)
		goto dump_trans_data;

	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
	dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
	dump_mem = (void *)dump_data->data;
	dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
	dump_mem->offset = cpu_to_le32(sram_ofs);
	iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
				 sram_len);

	if (smem_len) {
		dump_data = iwl_fw_error_next_data(dump_data);
		dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
		dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
		dump_mem = (void *)dump_data->data;
		dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
		dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
		iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
					 dump_mem->data, smem_len);
	}

	if (sram2_len) {
		dump_data = iwl_fw_error_next_data(dump_data);
		dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
		dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
		dump_mem = (void *)dump_data->data;
		dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
		dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
		iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
					 dump_mem->data, sram2_len);
	}

	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
	    CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
		dump_data = iwl_fw_error_next_data(dump_data);
		dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
		dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
					     sizeof(*dump_mem));
		dump_mem = (void *)dump_data->data;
		dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
		dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
		iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
					 dump_mem->data, IWL8260_ICCM_LEN);
	}

	/* Dump fw's virtual image */
	if (mvm->fw->img[mvm->cur_ucode].paging_mem_size) {
		u32 i;

		for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
			struct iwl_fw_error_dump_paging *paging;
			struct page *pages =
				mvm->fw_paging_db[i].fw_paging_block;

			dump_data = iwl_fw_error_next_data(dump_data);
			dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
			dump_data->len = cpu_to_le32(sizeof(*paging) +
						     PAGING_BLOCK_SIZE);
			paging = (void *)dump_data->data;
			paging->index = cpu_to_le32(i);
			memcpy(paging->data, page_address(pages),
			       PAGING_BLOCK_SIZE);
		}
	}

	dump_data = iwl_fw_error_next_data(dump_data);
	iwl_dump_prph(mvm->trans, &dump_data);

dump_trans_data:
	fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
						       mvm->fw_dump_trig);
	fw_error_dump->op_mode_len = file_len;
	if (fw_error_dump->trans_ptr)
		file_len += fw_error_dump->trans_ptr->len;
	dump_file->file_len = cpu_to_le32(file_len);

	dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
		      GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);

	mvm->fw_dump_trig = NULL;
	clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
}

struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
	.trig_desc = {
		.type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
	},
};

int iwl_mvm_fw_dbg_collect_desc(struct iwl_mvm *mvm,
				struct iwl_mvm_dump_desc *desc,
				struct iwl_fw_dbg_trigger_tlv *trigger)
{
	unsigned int delay = 0;

	if (trigger)
		delay = msecs_to_jiffies(le32_to_cpu(trigger->stop_delay));

	if (test_and_set_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status))
		return -EBUSY;

	if (WARN_ON(mvm->fw_dump_desc))
		iwl_mvm_free_fw_dump_desc(mvm);

	IWL_WARN(mvm, "Collecting data: trigger %d fired.\n",
		 le32_to_cpu(desc->trig_desc.type));

	mvm->fw_dump_desc = desc;
	mvm->fw_dump_trig = trigger;

	queue_delayed_work(system_wq, &mvm->fw_dump_wk, delay);

	return 0;
}

int iwl_mvm_fw_dbg_collect(struct iwl_mvm *mvm, enum iwl_fw_dbg_trigger trig,
			   const char *str, size_t len,
			   struct iwl_fw_dbg_trigger_tlv *trigger)
{
	struct iwl_mvm_dump_desc *desc;

	desc = kzalloc(sizeof(*desc) + len, GFP_ATOMIC);
	if (!desc)
		return -ENOMEM;

	desc->len = len;
	desc->trig_desc.type = cpu_to_le32(trig);
	memcpy(desc->trig_desc.data, str, len);

	return iwl_mvm_fw_dbg_collect_desc(mvm, desc, trigger);
}

int iwl_mvm_fw_dbg_collect_trig(struct iwl_mvm *mvm,
				struct iwl_fw_dbg_trigger_tlv *trigger,
				const char *fmt, ...)
{
	u16 occurrences = le16_to_cpu(trigger->occurrences);
	int ret, len = 0;
	char buf[64];

	if (!occurrences)
		return 0;

	if (fmt) {
		va_list ap;

		buf[sizeof(buf) - 1] = '\0';

		va_start(ap, fmt);
		vsnprintf(buf, sizeof(buf), fmt, ap);
		va_end(ap);

		/* check for truncation */
		if (WARN_ON_ONCE(buf[sizeof(buf) - 1]))
			buf[sizeof(buf) - 1] = '\0';

		len = strlen(buf) + 1;
	}

	ret = iwl_mvm_fw_dbg_collect(mvm, le32_to_cpu(trigger->id), buf, len,
				     trigger);

	if (ret)
		return ret;

	trigger->occurrences = cpu_to_le16(occurrences - 1);
	return 0;
}

static inline void iwl_mvm_restart_early_start(struct iwl_mvm *mvm)
{
	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000)
		iwl_clear_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
	else
		iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 1);
}

int iwl_mvm_start_fw_dbg_conf(struct iwl_mvm *mvm, u8 conf_id)
{
	u8 *ptr;
	int ret;
	int i;

	if (WARN_ONCE(conf_id >= ARRAY_SIZE(mvm->fw->dbg_conf_tlv),
		      "Invalid configuration %d\n", conf_id))
		return -EINVAL;

	/* EARLY START - firmware's configuration is hard coded */
	if ((!mvm->fw->dbg_conf_tlv[conf_id] ||
	     !mvm->fw->dbg_conf_tlv[conf_id]->num_of_hcmds) &&
	    conf_id == FW_DBG_START_FROM_ALIVE) {
		iwl_mvm_restart_early_start(mvm);
		return 0;
	}

	if (!mvm->fw->dbg_conf_tlv[conf_id])
		return -EINVAL;

	if (mvm->fw_dbg_conf != FW_DBG_INVALID)
		IWL_WARN(mvm, "FW already configured (%d) - re-configuring\n",
			 mvm->fw_dbg_conf);

	/* Send all HCMDs for configuring the FW debug */
	ptr = (void *)&mvm->fw->dbg_conf_tlv[conf_id]->hcmd;
	for (i = 0; i < mvm->fw->dbg_conf_tlv[conf_id]->num_of_hcmds; i++) {
		struct iwl_fw_dbg_conf_hcmd *cmd = (void *)ptr;

		ret = iwl_mvm_send_cmd_pdu(mvm, cmd->id, 0,
					   le16_to_cpu(cmd->len), cmd->data);
		if (ret)
			return ret;

		ptr += sizeof(*cmd);
		ptr += le16_to_cpu(cmd->len);
	}

	mvm->fw_dbg_conf = conf_id;
	return ret;
}