drivers/net/wireless/intel/iwlwifi/iwl-io.c - linux - Git at Google

 /******************************************************************************
  *
  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  *
  * Portions of this file are derived from the ipw3945 project.
  *
  * 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.
  *
  * The full GNU General Public License is included in this distribution in the
  * file called LICENSE.
  *
  * Contact Information:
  *  Intel Linux Wireless <linuxwifi@intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  *****************************************************************************/
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/export.h>

 #include "iwl-drv.h"
 #include "iwl-io.h"
 #include "iwl-csr.h"
 #include "iwl-debug.h"
 #include "iwl-prph.h"
 #include "iwl-fh.h"

 void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
 {
 	trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
 	iwl_trans_write8(trans, ofs, val);
 }
 IWL_EXPORT_SYMBOL(iwl_write8);

 void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
 {
 	trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
 	iwl_trans_write32(trans, ofs, val);
 }
 IWL_EXPORT_SYMBOL(iwl_write32);

 void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
 {
 	trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
 	iwl_trans_write32(trans, ofs, lower_32_bits(val));
 	iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
 }
 IWL_EXPORT_SYMBOL(iwl_write64);

 u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
 {
 	u32 val = iwl_trans_read32(trans, ofs);

 	trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
 	return val;
 }
 IWL_EXPORT_SYMBOL(iwl_read32);

 #define IWL_POLL_INTERVAL 10	/* microseconds */

 int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
 		 u32 bits, u32 mask, int timeout)
 {
 	int t = 0;

 	do {
 		if ((iwl_read32(trans, addr) & mask) == (bits & mask))
 			return t;
 		udelay(IWL_POLL_INTERVAL);
 		t += IWL_POLL_INTERVAL;
 	} while (t < timeout);

 	return -ETIMEDOUT;
 }
 IWL_EXPORT_SYMBOL(iwl_poll_bit);

 u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
 {
 	u32 value = 0x5a5a5a5a;
 	unsigned long flags;
 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		value = iwl_read32(trans, reg);
 		iwl_trans_release_nic_access(trans, &flags);
 	}

 	return value;
 }
 IWL_EXPORT_SYMBOL(iwl_read_direct32);

 void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
 {
 	unsigned long flags;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		iwl_write32(trans, reg, value);
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_write_direct32);

 void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
 {
 	unsigned long flags;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		iwl_write64(trans, reg, value);
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_write_direct64);

 int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
 			int timeout)
 {
 	int t = 0;

 	do {
 		if ((iwl_read_direct32(trans, addr) & mask) == mask)
 			return t;
 		udelay(IWL_POLL_INTERVAL);
 		t += IWL_POLL_INTERVAL;
 	} while (t < timeout);

 	return -ETIMEDOUT;
 }
 IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);

 u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
 {
 	u32 val = iwl_trans_read_prph(trans, ofs);
 	trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
 	return val;
 }
 IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);

 void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
 {
 	trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
 	iwl_trans_write_prph(trans, ofs, val);
 }
 IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);

 void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
 {
 	trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
 	iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
 	iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
 }
 IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);

 u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
 {
 	unsigned long flags;
 	u32 val = 0x5a5a5a5a;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		val = iwl_read_prph_no_grab(trans, ofs);
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 	return val;
 }
 IWL_EXPORT_SYMBOL(iwl_read_prph);

 void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
 {
 	unsigned long flags;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		iwl_write_prph_no_grab(trans, ofs, val);
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_write_prph);

 int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
 		      u32 bits, u32 mask, int timeout)
 {
 	int t = 0;

 	do {
 		if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
 			return t;
 		udelay(IWL_POLL_INTERVAL);
 		t += IWL_POLL_INTERVAL;
 	} while (t < timeout);

 	return -ETIMEDOUT;
 }

 void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
 {
 	unsigned long flags;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		iwl_write_prph_no_grab(trans, ofs,
 				       iwl_read_prph_no_grab(trans, ofs) |
 				       mask);
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_set_bits_prph);

 void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
 			    u32 bits, u32 mask)
 {
 	unsigned long flags;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		iwl_write_prph_no_grab(trans, ofs,
 				       (iwl_read_prph_no_grab(trans, ofs) &
 					mask) | bits);
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);

 void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
 {
 	unsigned long flags;
 	u32 val;

 	if (iwl_trans_grab_nic_access(trans, &flags)) {
 		val = iwl_read_prph_no_grab(trans, ofs);
 		iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
 		iwl_trans_release_nic_access(trans, &flags);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);

 void iwl_force_nmi(struct iwl_trans *trans)
 {
 	if (trans->cfg->device_family < IWL_DEVICE_FAMILY_9000)
 		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
 			       DEVICE_SET_NMI_VAL_DRV);
 	else
 		iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER,
 			       UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK);
 }
 IWL_EXPORT_SYMBOL(iwl_force_nmi);

 static const char *get_rfh_string(int cmd)
 {
 #define IWL_CMD(x) case x: return #x
 #define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }

 	int i;

 	for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
 		IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
 		IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
 		IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
 		IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
 	}

 	switch (cmd) {
 	IWL_CMD(RFH_RXF_DMA_CFG);
 	IWL_CMD(RFH_GEN_CFG);
 	IWL_CMD(RFH_GEN_STATUS);
 	IWL_CMD(FH_TSSR_TX_STATUS_REG);
 	IWL_CMD(FH_TSSR_TX_ERROR_REG);
 	default:
 		return "UNKNOWN";
 	}
 #undef IWL_CMD_MQ
 }

 struct reg {
 	u32 addr;
 	bool is64;
 };

 static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
 {
 	int i, q;
 	int num_q = trans->num_rx_queues;
 	static const u32 rfh_tbl[] = {
 		RFH_RXF_DMA_CFG,
 		RFH_GEN_CFG,
 		RFH_GEN_STATUS,
 		FH_TSSR_TX_STATUS_REG,
 		FH_TSSR_TX_ERROR_REG,
 	};
 	static const struct reg rfh_mq_tbl[] = {
 		{ RFH_Q0_FRBDCB_BA_LSB, true },
 		{ RFH_Q0_FRBDCB_WIDX, false },
 		{ RFH_Q0_FRBDCB_RIDX, false },
 		{ RFH_Q0_URBD_STTS_WPTR_LSB, true },
 	};

 #ifdef CONFIG_IWLWIFI_DEBUGFS
 	if (buf) {
 		int pos = 0;
 		/*
 		 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars
 		 * Colon + space: 2 characters
 		 * 0X%08x: 10 characters
 		 * New line: 1 character
 		 * Total of 53 characters
 		 */
 		size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
 			       ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;

 		*buf = kmalloc(bufsz, GFP_KERNEL);
 		if (!*buf)
 			return -ENOMEM;

 		pos += scnprintf(*buf + pos, bufsz - pos,
 				"RFH register values:\n");

 		for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
 			pos += scnprintf(*buf + pos, bufsz - pos,
 				"%40s: 0X%08x\n",
 				get_rfh_string(rfh_tbl[i]),
 				iwl_read_prph(trans, rfh_tbl[i]));

 		for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
 			for (q = 0; q < num_q; q++) {
 				u32 addr = rfh_mq_tbl[i].addr;

 				addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
 				pos += scnprintf(*buf + pos, bufsz - pos,
 					"%34s(q %2d): 0X%08x\n",
 					get_rfh_string(addr), q,
 					iwl_read_prph(trans, addr));
 			}

 		return pos;
 	}
 #endif

 	IWL_ERR(trans, "RFH register values:\n");
 	for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
 		IWL_ERR(trans, "  %34s: 0X%08x\n",
 			get_rfh_string(rfh_tbl[i]),
 			iwl_read_prph(trans, rfh_tbl[i]));

 	for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
 		for (q = 0; q < num_q; q++) {
 			u32 addr = rfh_mq_tbl[i].addr;

 			addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
 			IWL_ERR(trans, "  %34s(q %d): 0X%08x\n",
 				get_rfh_string(addr), q,
 				iwl_read_prph(trans, addr));
 		}

 	return 0;
 }

 static const char *get_fh_string(int cmd)
 {
 	switch (cmd) {
 	IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
 	IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
 	IWL_CMD(FH_RSCSR_CHNL0_WPTR);
 	IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
 	IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
 	IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
 	IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
 	IWL_CMD(FH_TSSR_TX_STATUS_REG);
 	IWL_CMD(FH_TSSR_TX_ERROR_REG);
 	default:
 		return "UNKNOWN";
 	}
 #undef IWL_CMD
 }

 int iwl_dump_fh(struct iwl_trans *trans, char **buf)
 {
 	int i;
 	static const u32 fh_tbl[] = {
 		FH_RSCSR_CHNL0_STTS_WPTR_REG,
 		FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 		FH_RSCSR_CHNL0_WPTR,
 		FH_MEM_RCSR_CHNL0_CONFIG_REG,
 		FH_MEM_RSSR_SHARED_CTRL_REG,
 		FH_MEM_RSSR_RX_STATUS_REG,
 		FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
 		FH_TSSR_TX_STATUS_REG,
 		FH_TSSR_TX_ERROR_REG
 	};

 	if (trans->cfg->mq_rx_supported)
 		return iwl_dump_rfh(trans, buf);

 #ifdef CONFIG_IWLWIFI_DEBUGFS
 	if (buf) {
 		int pos = 0;
 		size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;

 		*buf = kmalloc(bufsz, GFP_KERNEL);
 		if (!*buf)
 			return -ENOMEM;

 		pos += scnprintf(*buf + pos, bufsz - pos,
 				"FH register values:\n");

 		for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
 			pos += scnprintf(*buf + pos, bufsz - pos,
 				"  %34s: 0X%08x\n",
 				get_fh_string(fh_tbl[i]),
 				iwl_read_direct32(trans, fh_tbl[i]));

 		return pos;
 	}
 #endif

 	IWL_ERR(trans, "FH register values:\n");
 	for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++)
 		IWL_ERR(trans, "  %34s: 0X%08x\n",
 			get_fh_string(fh_tbl[i]),
 			iwl_read_direct32(trans, fh_tbl[i]));

 	return 0;
 }
	/******************************************************************************
	*
	* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
	* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
	*
	* Portions of this file are derived from the ipw3945 project.
	*
	* 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.
	*
	* The full GNU General Public License is included in this distribution in the
	* file called LICENSE.
	*
	* Contact Information:
	* Intel Linux Wireless <linuxwifi@intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	*****************************************************************************/
	#include <linux/delay.h>
	#include <linux/device.h>
	#include <linux/export.h>

	#include "iwl-drv.h"
	#include "iwl-io.h"
	#include "iwl-csr.h"
	#include "iwl-debug.h"
	#include "iwl-prph.h"
	#include "iwl-fh.h"

	void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
	{
	trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
	iwl_trans_write8(trans, ofs, val);
	}
	IWL_EXPORT_SYMBOL(iwl_write8);

	void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
	{
	trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
	iwl_trans_write32(trans, ofs, val);
	}
	IWL_EXPORT_SYMBOL(iwl_write32);

	void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
	{
	trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
	iwl_trans_write32(trans, ofs, lower_32_bits(val));
	iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
	}
	IWL_EXPORT_SYMBOL(iwl_write64);

	u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
	{
	u32 val = iwl_trans_read32(trans, ofs);

	trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
	return val;
	}
	IWL_EXPORT_SYMBOL(iwl_read32);

	#define IWL_POLL_INTERVAL 10 /* microseconds */

	int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
	u32 bits, u32 mask, int timeout)
	{
	int t = 0;

	do {
	if ((iwl_read32(trans, addr) & mask) == (bits & mask))
	return t;
	udelay(IWL_POLL_INTERVAL);
	t += IWL_POLL_INTERVAL;
	} while (t < timeout);

	return -ETIMEDOUT;
	}
	IWL_EXPORT_SYMBOL(iwl_poll_bit);

	u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
	{
	u32 value = 0x5a5a5a5a;
	unsigned long flags;
	if (iwl_trans_grab_nic_access(trans, &flags)) {
	value = iwl_read32(trans, reg);
	iwl_trans_release_nic_access(trans, &flags);
	}

	return value;
	}
	IWL_EXPORT_SYMBOL(iwl_read_direct32);

	void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
	{
	unsigned long flags;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	iwl_write32(trans, reg, value);
	iwl_trans_release_nic_access(trans, &flags);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_write_direct32);

	void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
	{
	unsigned long flags;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	iwl_write64(trans, reg, value);
	iwl_trans_release_nic_access(trans, &flags);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_write_direct64);

	int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
	int timeout)
	{
	int t = 0;

	do {
	if ((iwl_read_direct32(trans, addr) & mask) == mask)
	return t;
	udelay(IWL_POLL_INTERVAL);
	t += IWL_POLL_INTERVAL;
	} while (t < timeout);

	return -ETIMEDOUT;
	}
	IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);

	u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
	{
	u32 val = iwl_trans_read_prph(trans, ofs);
	trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
	return val;
	}
	IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);

	void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
	{
	trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
	iwl_trans_write_prph(trans, ofs, val);
	}
	IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);

	void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
	{
	trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
	iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
	iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
	}
	IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);

	u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
	{
	unsigned long flags;
	u32 val = 0x5a5a5a5a;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	val = iwl_read_prph_no_grab(trans, ofs);
	iwl_trans_release_nic_access(trans, &flags);
	}
	return val;
	}
	IWL_EXPORT_SYMBOL(iwl_read_prph);

	void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
	{
	unsigned long flags;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	iwl_write_prph_no_grab(trans, ofs, val);
	iwl_trans_release_nic_access(trans, &flags);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_write_prph);

	int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
	u32 bits, u32 mask, int timeout)
	{
	int t = 0;

	do {
	if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
	return t;
	udelay(IWL_POLL_INTERVAL);
	t += IWL_POLL_INTERVAL;
	} while (t < timeout);

	return -ETIMEDOUT;
	}

	void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
	{
	unsigned long flags;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	iwl_write_prph_no_grab(trans, ofs,
	iwl_read_prph_no_grab(trans, ofs) \|
	mask);
	iwl_trans_release_nic_access(trans, &flags);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_set_bits_prph);

	void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
	u32 bits, u32 mask)
	{
	unsigned long flags;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	iwl_write_prph_no_grab(trans, ofs,
	(iwl_read_prph_no_grab(trans, ofs) &
	mask) \| bits);
	iwl_trans_release_nic_access(trans, &flags);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);

	void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
	{
	unsigned long flags;
	u32 val;

	if (iwl_trans_grab_nic_access(trans, &flags)) {
	val = iwl_read_prph_no_grab(trans, ofs);
	iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
	iwl_trans_release_nic_access(trans, &flags);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);

	void iwl_force_nmi(struct iwl_trans *trans)
	{
	if (trans->cfg->device_family < IWL_DEVICE_FAMILY_9000)
	iwl_write_prph(trans, DEVICE_SET_NMI_REG,
	DEVICE_SET_NMI_VAL_DRV);
	else
	iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER,
	UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK);
	}
	IWL_EXPORT_SYMBOL(iwl_force_nmi);

	static const char *get_rfh_string(int cmd)
	{
	#define IWL_CMD(x) case x: return #x
	#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }

	int i;

	for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
	IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
	IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
	IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
	IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
	}

	switch (cmd) {
	IWL_CMD(RFH_RXF_DMA_CFG);
	IWL_CMD(RFH_GEN_CFG);
	IWL_CMD(RFH_GEN_STATUS);
	IWL_CMD(FH_TSSR_TX_STATUS_REG);
	IWL_CMD(FH_TSSR_TX_ERROR_REG);
	default:
	return "UNKNOWN";
	}
	#undef IWL_CMD_MQ
	}

	struct reg {
	u32 addr;
	bool is64;
	};

	static int iwl_dump_rfh(struct iwl_trans trans, char *buf)
	{
	int i, q;
	int num_q = trans->num_rx_queues;
	static const u32 rfh_tbl[] = {
	RFH_RXF_DMA_CFG,
	RFH_GEN_CFG,
	RFH_GEN_STATUS,
	FH_TSSR_TX_STATUS_REG,
	FH_TSSR_TX_ERROR_REG,
	};
	static const struct reg rfh_mq_tbl[] = {
	{ RFH_Q0_FRBDCB_BA_LSB, true },
	{ RFH_Q0_FRBDCB_WIDX, false },
	{ RFH_Q0_FRBDCB_RIDX, false },
	{ RFH_Q0_URBD_STTS_WPTR_LSB, true },
	};

	#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (buf) {
	int pos = 0;
	/*
	* Register (up to 34 for name + 8 blank/q for MQ): 40 chars
	* Colon + space: 2 characters
	* 0X%08x: 10 characters
	* New line: 1 character
	* Total of 53 characters
	*/
	size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
	ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;

	*buf = kmalloc(bufsz, GFP_KERNEL);
	if (!*buf)
	return -ENOMEM;

	pos += scnprintf(*buf + pos, bufsz - pos,
	"RFH register values:\n");

	for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
	pos += scnprintf(*buf + pos, bufsz - pos,
	"%40s: 0X%08x\n",
	get_rfh_string(rfh_tbl[i]),
	iwl_read_prph(trans, rfh_tbl[i]));

	for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
	for (q = 0; q < num_q; q++) {
	u32 addr = rfh_mq_tbl[i].addr;

	addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
	pos += scnprintf(*buf + pos, bufsz - pos,
	"%34s(q %2d): 0X%08x\n",
	get_rfh_string(addr), q,
	iwl_read_prph(trans, addr));
	}

	return pos;
	}
	#endif

	IWL_ERR(trans, "RFH register values:\n");
	for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
	IWL_ERR(trans, " %34s: 0X%08x\n",
	get_rfh_string(rfh_tbl[i]),
	iwl_read_prph(trans, rfh_tbl[i]));

	for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
	for (q = 0; q < num_q; q++) {
	u32 addr = rfh_mq_tbl[i].addr;

	addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
	IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
	get_rfh_string(addr), q,
	iwl_read_prph(trans, addr));
	}

	return 0;
	}

	static const char *get_fh_string(int cmd)
	{
	switch (cmd) {
	IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
	IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
	IWL_CMD(FH_RSCSR_CHNL0_WPTR);
	IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
	IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
	IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
	IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
	IWL_CMD(FH_TSSR_TX_STATUS_REG);
	IWL_CMD(FH_TSSR_TX_ERROR_REG);
	default:
	return "UNKNOWN";
	}
	#undef IWL_CMD
	}

	int iwl_dump_fh(struct iwl_trans trans, char *buf)
	{
	int i;
	static const u32 fh_tbl[] = {
	FH_RSCSR_CHNL0_STTS_WPTR_REG,
	FH_RSCSR_CHNL0_RBDCB_BASE_REG,
	FH_RSCSR_CHNL0_WPTR,
	FH_MEM_RCSR_CHNL0_CONFIG_REG,
	FH_MEM_RSSR_SHARED_CTRL_REG,
	FH_MEM_RSSR_RX_STATUS_REG,
	FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
	FH_TSSR_TX_STATUS_REG,
	FH_TSSR_TX_ERROR_REG
	};

	if (trans->cfg->mq_rx_supported)
	return iwl_dump_rfh(trans, buf);

	#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (buf) {
	int pos = 0;
	size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;

	*buf = kmalloc(bufsz, GFP_KERNEL);
	if (!*buf)
	return -ENOMEM;

	pos += scnprintf(*buf + pos, bufsz - pos,
	"FH register values:\n");

	for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
	pos += scnprintf(*buf + pos, bufsz - pos,
	" %34s: 0X%08x\n",
	get_fh_string(fh_tbl[i]),
	iwl_read_direct32(trans, fh_tbl[i]));

	return pos;
	}
	#endif

	IWL_ERR(trans, "FH register values:\n");
	for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
	IWL_ERR(trans, " %34s: 0X%08x\n",
	get_fh_string(fh_tbl[i]),
	iwl_read_direct32(trans, fh_tbl[i]));

	return 0;
	}