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

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright (C) 2003-2014, 2018-2021 Intel Corporation
  * Copyright (C) 2015-2016 Intel Deutschland GmbH
  */
 #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;

 	if (iwl_trans_grab_nic_access(trans)) {
 		value = iwl_read32(trans, reg);
 		iwl_trans_release_nic_access(trans);
 	}

 	return value;
 }
 IWL_EXPORT_SYMBOL(iwl_read_direct32);

 void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
 {
 	if (iwl_trans_grab_nic_access(trans)) {
 		iwl_write32(trans, reg, value);
 		iwl_trans_release_nic_access(trans);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_write_direct32);

 void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
 {
 	if (iwl_trans_grab_nic_access(trans)) {
 		iwl_write64(trans, reg, value);
 		iwl_trans_release_nic_access(trans);
 	}
 }
 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)
 {
 	u32 val = 0x5a5a5a5a;

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

 void iwl_write_prph_delay(struct iwl_trans *trans, u32 ofs, u32 val, u32 delay_ms)
 {
 	if (iwl_trans_grab_nic_access(trans)) {
 		mdelay(delay_ms);
 		iwl_write_prph_no_grab(trans, ofs, val);
 		iwl_trans_release_nic_access(trans);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_write_prph_delay);

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

 void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
 			    u32 bits, u32 mask)
 {
 	if (iwl_trans_grab_nic_access(trans)) {
 		iwl_write_prph_no_grab(trans, ofs,
 				       (iwl_read_prph_no_grab(trans, ofs) &
 					mask) | bits);
 		iwl_trans_release_nic_access(trans);
 	}
 }
 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);

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

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

 void iwl_force_nmi(struct iwl_trans *trans)
 {
 	if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_9000)
 		iwl_write_prph_delay(trans, DEVICE_SET_NMI_REG,
 				     DEVICE_SET_NMI_VAL_DRV, 1);
 	else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
 		iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
 				UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER);
 	else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
 		iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
 				    UREG_DOORBELL_TO_ISR6_NMI_BIT);
 	else
 		iwl_write32(trans, CSR_DOORBELL_VECTOR,
 			    CSR_DOORBELL_VECTOR_NMI);
 }
 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->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;
 }

 #define IWL_HOST_MON_BLOCK_PEMON	0x00
 #define IWL_HOST_MON_BLOCK_HIPM		0x22

 #define IWL_HOST_MON_BLOCK_PEMON_VEC0	0x00
 #define IWL_HOST_MON_BLOCK_PEMON_VEC1	0x01
 #define IWL_HOST_MON_BLOCK_PEMON_WFPM	0x06

 static void iwl_dump_host_monitor_block(struct iwl_trans *trans,
 					u32 block, u32 vec, u32 iter)
 {
 	int i;

 	IWL_ERR(trans, "Host monitor block 0x%x vector 0x%x\n", block, vec);
 	iwl_write32(trans, CSR_MONITOR_CFG_REG, (block << 8) | vec);
 	for (i = 0; i < iter; i++)
 		IWL_ERR(trans, "    value [iter %d]: 0x%08x\n",
 			i, iwl_read32(trans, CSR_MONITOR_STATUS_REG));
 }

 static void iwl_dump_host_monitor(struct iwl_trans *trans)
 {
 	switch (trans->trans_cfg->device_family) {
 	case IWL_DEVICE_FAMILY_22000:
 	case IWL_DEVICE_FAMILY_AX210:
 		IWL_ERR(trans, "CSR_RESET = 0x%x\n",
 			iwl_read32(trans, CSR_RESET));
 		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
 					    IWL_HOST_MON_BLOCK_PEMON_VEC0, 15);
 		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
 					    IWL_HOST_MON_BLOCK_PEMON_VEC1, 15);
 		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
 					    IWL_HOST_MON_BLOCK_PEMON_WFPM, 15);
 		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_HIPM,
 					    IWL_HOST_MON_BLOCK_PEMON_VEC0, 1);
 		break;
 	default:
 		/* not supported yet */
 		return;
 	}
 }

 int iwl_finish_nic_init(struct iwl_trans *trans)
 {
 	const struct iwl_cfg_trans_params *cfg_trans = trans->trans_cfg;
 	u32 poll_ready;
 	int err;

 	if (cfg_trans->bisr_workaround) {
 		/* ensure the TOP FSM isn't still in previous reset */
 		mdelay(2);
 	}

 	/*
 	 * Set "initialization complete" bit to move adapter from
 	 * D0U* --> D0A* (powered-up active) state.
 	 */
 	if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_BZ) {
 		iwl_set_bit(trans, CSR_GP_CNTRL,
 			    CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 			    CSR_GP_CNTRL_REG_FLAG_MAC_INIT);
 		poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
 	} else {
 		iwl_set_bit(trans, CSR_GP_CNTRL,
 			    CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 		poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY;
 	}

 	if (cfg_trans->device_family == IWL_DEVICE_FAMILY_8000)
 		udelay(2);

 	/*
 	 * Wait for clock stabilization; once stabilized, access to
 	 * device-internal resources is supported, e.g. iwl_write_prph()
 	 * and accesses to uCode SRAM.
 	 */
 	err = iwl_poll_bit(trans, CSR_GP_CNTRL, poll_ready, poll_ready, 25000);
 	if (err < 0) {
 		IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");

 		iwl_dump_host_monitor(trans);
 	}

 	if (cfg_trans->bisr_workaround) {
 		/* ensure BISR shift has finished */
 		udelay(200);
 	}

 	return err < 0 ? err : 0;
 }
 IWL_EXPORT_SYMBOL(iwl_finish_nic_init);

 void iwl_trans_sync_nmi_with_addr(struct iwl_trans *trans, u32 inta_addr,
 				  u32 sw_err_bit)
 {
 	unsigned long timeout = jiffies + IWL_TRANS_NMI_TIMEOUT;
 	bool interrupts_enabled = test_bit(STATUS_INT_ENABLED, &trans->status);

 	/* if the interrupts were already disabled, there is no point in
 	 * calling iwl_disable_interrupts
 	 */
 	if (interrupts_enabled)
 		iwl_trans_interrupts(trans, false);

 	iwl_force_nmi(trans);
 	while (time_after(timeout, jiffies)) {
 		u32 inta_hw = iwl_read32(trans, inta_addr);

 		/* Error detected by uCode */
 		if (inta_hw & sw_err_bit) {
 			/* Clear causes register */
 			iwl_write32(trans, inta_addr, inta_hw & sw_err_bit);
 			break;
 		}

 		mdelay(1);
 	}

 	/* enable interrupts only if there were already enabled before this
 	 * function to avoid a case were the driver enable interrupts before
 	 * proper configurations were made
 	 */
 	if (interrupts_enabled)
 		iwl_trans_interrupts(trans, true);

 	iwl_trans_fw_error(trans, false);
 }
	// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
	/*
	* Copyright (C) 2003-2014, 2018-2021 Intel Corporation
	* Copyright (C) 2015-2016 Intel Deutschland GmbH
	*/
	#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;

	if (iwl_trans_grab_nic_access(trans)) {
	value = iwl_read32(trans, reg);
	iwl_trans_release_nic_access(trans);
	}

	return value;
	}
	IWL_EXPORT_SYMBOL(iwl_read_direct32);

	void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
	{
	if (iwl_trans_grab_nic_access(trans)) {
	iwl_write32(trans, reg, value);
	iwl_trans_release_nic_access(trans);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_write_direct32);

	void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
	{
	if (iwl_trans_grab_nic_access(trans)) {
	iwl_write64(trans, reg, value);
	iwl_trans_release_nic_access(trans);
	}
	}
	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)
	{
	u32 val = 0x5a5a5a5a;

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

	void iwl_write_prph_delay(struct iwl_trans *trans, u32 ofs, u32 val, u32 delay_ms)
	{
	if (iwl_trans_grab_nic_access(trans)) {
	mdelay(delay_ms);
	iwl_write_prph_no_grab(trans, ofs, val);
	iwl_trans_release_nic_access(trans);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_write_prph_delay);

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

	void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
	u32 bits, u32 mask)
	{
	if (iwl_trans_grab_nic_access(trans)) {
	iwl_write_prph_no_grab(trans, ofs,
	(iwl_read_prph_no_grab(trans, ofs) &
	mask) \| bits);
	iwl_trans_release_nic_access(trans);
	}
	}
	IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);

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

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

	void iwl_force_nmi(struct iwl_trans *trans)
	{
	if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_9000)
	iwl_write_prph_delay(trans, DEVICE_SET_NMI_REG,
	DEVICE_SET_NMI_VAL_DRV, 1);
	else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
	iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
	UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER);
	else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
	iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
	UREG_DOORBELL_TO_ISR6_NMI_BIT);
	else
	iwl_write32(trans, CSR_DOORBELL_VECTOR,
	CSR_DOORBELL_VECTOR_NMI);
	}
	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->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;
	}

	#define IWL_HOST_MON_BLOCK_PEMON 0x00
	#define IWL_HOST_MON_BLOCK_HIPM 0x22

	#define IWL_HOST_MON_BLOCK_PEMON_VEC0 0x00
	#define IWL_HOST_MON_BLOCK_PEMON_VEC1 0x01
	#define IWL_HOST_MON_BLOCK_PEMON_WFPM 0x06

	static void iwl_dump_host_monitor_block(struct iwl_trans *trans,
	u32 block, u32 vec, u32 iter)
	{
	int i;

	IWL_ERR(trans, "Host monitor block 0x%x vector 0x%x\n", block, vec);
	iwl_write32(trans, CSR_MONITOR_CFG_REG, (block << 8) \| vec);
	for (i = 0; i < iter; i++)
	IWL_ERR(trans, " value [iter %d]: 0x%08x\n",
	i, iwl_read32(trans, CSR_MONITOR_STATUS_REG));
	}

	static void iwl_dump_host_monitor(struct iwl_trans *trans)
	{
	switch (trans->trans_cfg->device_family) {
	case IWL_DEVICE_FAMILY_22000:
	case IWL_DEVICE_FAMILY_AX210:
	IWL_ERR(trans, "CSR_RESET = 0x%x\n",
	iwl_read32(trans, CSR_RESET));
	iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
	IWL_HOST_MON_BLOCK_PEMON_VEC0, 15);
	iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
	IWL_HOST_MON_BLOCK_PEMON_VEC1, 15);
	iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
	IWL_HOST_MON_BLOCK_PEMON_WFPM, 15);
	iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_HIPM,
	IWL_HOST_MON_BLOCK_PEMON_VEC0, 1);
	break;
	default:
	/* not supported yet */
	return;
	}
	}

	int iwl_finish_nic_init(struct iwl_trans *trans)
	{
	const struct iwl_cfg_trans_params *cfg_trans = trans->trans_cfg;
	u32 poll_ready;
	int err;

	if (cfg_trans->bisr_workaround) {
	/* ensure the TOP FSM isn't still in previous reset */
	mdelay(2);
	}

	/*
	* Set "initialization complete" bit to move adapter from
	* D0U* --> D0A* (powered-up active) state.
	*/
	if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_BZ) {
	iwl_set_bit(trans, CSR_GP_CNTRL,
	CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY \|
	CSR_GP_CNTRL_REG_FLAG_MAC_INIT);
	poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
	} else {
	iwl_set_bit(trans, CSR_GP_CNTRL,
	CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
	poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY;
	}

	if (cfg_trans->device_family == IWL_DEVICE_FAMILY_8000)
	udelay(2);

	/*
	* Wait for clock stabilization; once stabilized, access to
	* device-internal resources is supported, e.g. iwl_write_prph()
	* and accesses to uCode SRAM.
	*/
	err = iwl_poll_bit(trans, CSR_GP_CNTRL, poll_ready, poll_ready, 25000);
	if (err < 0) {
	IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");

	iwl_dump_host_monitor(trans);
	}

	if (cfg_trans->bisr_workaround) {
	/* ensure BISR shift has finished */
	udelay(200);
	}

	return err < 0 ? err : 0;
	}
	IWL_EXPORT_SYMBOL(iwl_finish_nic_init);

	void iwl_trans_sync_nmi_with_addr(struct iwl_trans *trans, u32 inta_addr,
	u32 sw_err_bit)
	{
	unsigned long timeout = jiffies + IWL_TRANS_NMI_TIMEOUT;
	bool interrupts_enabled = test_bit(STATUS_INT_ENABLED, &trans->status);

	/* if the interrupts were already disabled, there is no point in
	* calling iwl_disable_interrupts
	*/
	if (interrupts_enabled)
	iwl_trans_interrupts(trans, false);

	iwl_force_nmi(trans);
	while (time_after(timeout, jiffies)) {
	u32 inta_hw = iwl_read32(trans, inta_addr);

	/* Error detected by uCode */
	if (inta_hw & sw_err_bit) {
	/* Clear causes register */
	iwl_write32(trans, inta_addr, inta_hw & sw_err_bit);
	break;
	}

	mdelay(1);
	}

	/* enable interrupts only if there were already enabled before this
	* function to avoid a case were the driver enable interrupts before
	* proper configurations were made
	*/
	if (interrupts_enabled)
	iwl_trans_interrupts(trans, true);

	iwl_trans_fw_error(trans, false);
	}