[linux-block.git] / drivers / net / wireless / intel / iwlwifi / iwl-io.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) 2003 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 - 2016 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.
 *
 * 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) 2003 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 - 2016 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/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;
}
Commit	Line	Data
02a7fa00	1	/******************************************************************************
cefec29e JB	2	*
	3	* This file is provided under a dual BSD/GPLv2 license. When using or
	4	* redistributing this file, you may do so under either license.
	5	*
	6	* GPL LICENSE SUMMARY
02a7fa00	7	*
51368bf7	8	* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
f65ebd88	9	* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
02a7fa00	10	*
02a7fa00 JB	11	* This program is free software; you can redistribute it and/or modify it
	12	* under the terms of version 2 of the GNU General Public License as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful, but WITHOUT
	16	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	17	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	18	* more details.
	19	*
02a7fa00	20	* The full GNU General Public License is included in this distribution in the
cefec29e	21	* file called COPYING.
02a7fa00 JB	22	*
02a7fa00 JB	23	* Contact Information:
cb2f8277	24	* Intel Linux Wireless <linuxwifi@intel.com>
02a7fa00 JB	25	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
02a7fa00 JB	26	*
cefec29e JB	27	* BSD LICENSE
	28	*
	29	* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
	30	* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
	31	* All rights reserved.
	32	*
	33	* Redistribution and use in source and binary forms, with or without
	34	* modification, are permitted provided that the following conditions
	35	* are met:
	36	*
	37	* * Redistributions of source code must retain the above copyright
	38	* notice, this list of conditions and the following disclaimer.
	39	* * Redistributions in binary form must reproduce the above copyright
	40	* notice, this list of conditions and the following disclaimer in
	41	* the documentation and/or other materials provided with the
	42	* distribution.
	43	* * Neither the name Intel Corporation nor the names of its
	44	* contributors may be used to endorse or promote products derived
	45	* from this software without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	48	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	49	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	50	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	51	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	52	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	53	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	54	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	55	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	56	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	57	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	58	*
02a7fa00	59	*****************************************************************************/
83ed9015 EG	60	#include <linux/delay.h>
83ed9015 EG	61	#include <linux/device.h>
cc5f7e39	62	#include <linux/export.h>
02a7fa00	63
48e29340	64	#include "iwl-drv.h"
02a7fa00	65	#include "iwl-io.h"
6ac7d115	66	#include "iwl-csr.h"
83ed9015	67	#include "iwl-debug.h"
4c9706dc	68	#include "iwl-prph.h"
313b0a29	69	#include "iwl-fh.h"
02a7fa00	70
a73a2cea EG	71	void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
	72	{
	73	trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
	74	iwl_trans_write8(trans, ofs, val);
	75	}
	76	IWL_EXPORT_SYMBOL(iwl_write8);
	77
	78	void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
	79	{
	80	trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
	81	iwl_trans_write32(trans, ofs, val);
	82	}
	83	IWL_EXPORT_SYMBOL(iwl_write32);
	84
12a17458 SS	85	void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
	86	{
	87	trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
bd31dd9d JB	88	iwl_trans_write32(trans, ofs, lower_32_bits(val));
bd31dd9d JB	89	iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
12a17458 SS	90	}
	91	IWL_EXPORT_SYMBOL(iwl_write64);
	92
a73a2cea EG	93	u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
	94	{
	95	u32 val = iwl_trans_read32(trans, ofs);
89ced540	96
a73a2cea EG	97	trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
	98	return val;
	99	}
	100	IWL_EXPORT_SYMBOL(iwl_read32);
	101
02a7fa00 JB	102	#define IWL_POLL_INTERVAL 10 /* microseconds */
02a7fa00 JB	103
1042db2a	104	int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
02a7fa00 JB	105	u32 bits, u32 mask, int timeout)
	106	{
	107	int t = 0;
	108
	109	do {
1042db2a	110	if ((iwl_read32(trans, addr) & mask) == (bits & mask))
02a7fa00 JB	111	return t;
	112	udelay(IWL_POLL_INTERVAL);
	113	t += IWL_POLL_INTERVAL;
	114	} while (t < timeout);
	115
	116	return -ETIMEDOUT;
	117	}
48e29340	118	IWL_EXPORT_SYMBOL(iwl_poll_bit);
02a7fa00	119
1042db2a	120	u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
02a7fa00	121	{
abae2386	122	u32 value = 0x5a5a5a5a;
02a7fa00	123	unsigned long flags;
23ba9340	124	if (iwl_trans_grab_nic_access(trans, &flags)) {
abae2386	125	value = iwl_read32(trans, reg);
e56b04ef	126	iwl_trans_release_nic_access(trans, &flags);
abae2386	127	}
02a7fa00 JB	128
	129	return value;
	130	}
48e29340	131	IWL_EXPORT_SYMBOL(iwl_read_direct32);
02a7fa00	132
1042db2a	133	void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
02a7fa00 JB	134	{
	135	unsigned long flags;
	136
23ba9340	137	if (iwl_trans_grab_nic_access(trans, &flags)) {
1042db2a	138	iwl_write32(trans, reg, value);
e56b04ef	139	iwl_trans_release_nic_access(trans, &flags);
02a7fa00	140	}
02a7fa00	141	}
48e29340	142	IWL_EXPORT_SYMBOL(iwl_write_direct32);
02a7fa00	143
12a17458 SS	144	void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
	145	{
	146	unsigned long flags;
	147
	148	if (iwl_trans_grab_nic_access(trans, &flags)) {
	149	iwl_write64(trans, reg, value);
	150	iwl_trans_release_nic_access(trans, &flags);
	151	}
	152	}
	153	IWL_EXPORT_SYMBOL(iwl_write_direct64);
	154
1042db2a	155	int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
02a7fa00 JB	156	int timeout)
	157	{
	158	int t = 0;
	159
	160	do {
1042db2a	161	if ((iwl_read_direct32(trans, addr) & mask) == mask)
02a7fa00 JB	162	return t;
	163	udelay(IWL_POLL_INTERVAL);
	164	t += IWL_POLL_INTERVAL;
	165	} while (t < timeout);
	166
	167	return -ETIMEDOUT;
	168	}
48e29340	169	IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
02a7fa00	170
14ef1b43	171	u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
02a7fa00	172	{
6a06b6c1 EG	173	u32 val = iwl_trans_read_prph(trans, ofs);
	174	trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
	175	return val;
02a7fa00	176	}
14ef1b43	177	IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
02a7fa00	178
14ef1b43	179	void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
02a7fa00	180	{
6a06b6c1 EG	181	trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
6a06b6c1 EG	182	iwl_trans_write_prph(trans, ofs, val);
02a7fa00	183	}
14ef1b43	184	IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
02a7fa00	185
12a17458 SS	186	void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
	187	{
	188	trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
	189	iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
	190	iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
	191	}
	192	IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);
	193
6a06b6c1	194	u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
02a7fa00 JB	195	{
02a7fa00 JB	196	unsigned long flags;
abae2386	197	u32 val = 0x5a5a5a5a;
02a7fa00	198
23ba9340	199	if (iwl_trans_grab_nic_access(trans, &flags)) {
14ef1b43	200	val = iwl_read_prph_no_grab(trans, ofs);
e56b04ef	201	iwl_trans_release_nic_access(trans, &flags);
abae2386	202	}
02a7fa00 JB	203	return val;
02a7fa00 JB	204	}
48e29340	205	IWL_EXPORT_SYMBOL(iwl_read_prph);
02a7fa00	206
6a06b6c1	207	void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
02a7fa00 JB	208	{
	209	unsigned long flags;
	210
23ba9340	211	if (iwl_trans_grab_nic_access(trans, &flags)) {
14ef1b43	212	iwl_write_prph_no_grab(trans, ofs, val);
e56b04ef	213	iwl_trans_release_nic_access(trans, &flags);
02a7fa00	214	}
02a7fa00	215	}
48e29340	216	IWL_EXPORT_SYMBOL(iwl_write_prph);
02a7fa00	217
189fa2fa EH	218	int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
	219	u32 bits, u32 mask, int timeout)
	220	{
	221	int t = 0;
	222
	223	do {
	224	if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
	225	return t;
	226	udelay(IWL_POLL_INTERVAL);
	227	t += IWL_POLL_INTERVAL;
	228	} while (t < timeout);
	229
	230	return -ETIMEDOUT;
	231	}
	232
6a06b6c1	233	void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
02a7fa00 JB	234	{
	235	unsigned long flags;
	236
23ba9340	237	if (iwl_trans_grab_nic_access(trans, &flags)) {
14ef1b43 GBA	238	iwl_write_prph_no_grab(trans, ofs,
	239	iwl_read_prph_no_grab(trans, ofs) \|
	240	mask);
e56b04ef	241	iwl_trans_release_nic_access(trans, &flags);
bfe4b80e	242	}
02a7fa00	243	}
48e29340	244	IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
02a7fa00	245
6a06b6c1	246	void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
02a7fa00 JB	247	u32 bits, u32 mask)
	248	{
	249	unsigned long flags;
	250
23ba9340	251	if (iwl_trans_grab_nic_access(trans, &flags)) {
14ef1b43 GBA	252	iwl_write_prph_no_grab(trans, ofs,
	253	(iwl_read_prph_no_grab(trans, ofs) &
	254	mask) \| bits);
e56b04ef	255	iwl_trans_release_nic_access(trans, &flags);
bfe4b80e	256	}
02a7fa00	257	}
48e29340	258	IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
02a7fa00	259
6a06b6c1	260	void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
02a7fa00 JB	261	{
	262	unsigned long flags;
	263	u32 val;
	264
23ba9340	265	if (iwl_trans_grab_nic_access(trans, &flags)) {
14ef1b43 GBA	266	val = iwl_read_prph_no_grab(trans, ofs);
14ef1b43 GBA	267	iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
e56b04ef	268	iwl_trans_release_nic_access(trans, &flags);
bfe4b80e	269	}
02a7fa00	270	}
48e29340	271	IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
313b0a29	272
4c9706dc LK	273	void iwl_force_nmi(struct iwl_trans *trans)
4c9706dc LK	274	{
f4ca70ef	275	if (trans->cfg->device_family < IWL_DEVICE_FAMILY_9000)
66396583 EG	276	iwl_write_prph(trans, DEVICE_SET_NMI_REG,
66396583 EG	277	DEVICE_SET_NMI_VAL_DRV);
f4ca70ef	278	else
b9410b18	279	iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER,
f4ca70ef	280	UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK);
4c9706dc LK	281	}
	282	IWL_EXPORT_SYMBOL(iwl_force_nmi);
	283
f65ebd88	284	static const char *get_rfh_string(int cmd)
313b0a29 IH	285	{
313b0a29 IH	286	#define IWL_CMD(x) case x: return #x
f65ebd88 SS	287	#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
	288
	289	int i;
	290
	291	for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
	292	IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
	293	IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
	294	IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
	295	IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
c0ed8aa4	296	}
f65ebd88 SS	297
	298	switch (cmd) {
	299	IWL_CMD(RFH_RXF_DMA_CFG);
	300	IWL_CMD(RFH_GEN_CFG);
	301	IWL_CMD(RFH_GEN_STATUS);
	302	IWL_CMD(FH_TSSR_TX_STATUS_REG);
	303	IWL_CMD(FH_TSSR_TX_ERROR_REG);
	304	default:
	305	return "UNKNOWN";
	306	}
	307	#undef IWL_CMD_MQ
	308	}
	309
	310	struct reg {
	311	u32 addr;
	312	bool is64;
	313	};
	314
	315	static int iwl_dump_rfh(struct iwl_trans trans, char *buf)
	316	{
	317	int i, q;
	318	int num_q = trans->num_rx_queues;
	319	static const u32 rfh_tbl[] = {
	320	RFH_RXF_DMA_CFG,
	321	RFH_GEN_CFG,
	322	RFH_GEN_STATUS,
	323	FH_TSSR_TX_STATUS_REG,
	324	FH_TSSR_TX_ERROR_REG,
	325	};
	326	static const struct reg rfh_mq_tbl[] = {
	327	{ RFH_Q0_FRBDCB_BA_LSB, true },
	328	{ RFH_Q0_FRBDCB_WIDX, false },
	329	{ RFH_Q0_FRBDCB_RIDX, false },
	330	{ RFH_Q0_URBD_STTS_WPTR_LSB, true },
	331	};
	332
	333	#ifdef CONFIG_IWLWIFI_DEBUGFS
	334	if (buf) {
	335	int pos = 0;
	336	/*
	337	* Register (up to 34 for name + 8 blank/q for MQ): 40 chars
	338	* Colon + space: 2 characters
	339	* 0X%08x: 10 characters
	340	* New line: 1 character
	341	* Total of 53 characters
	342	*/
	343	size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
	344	ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
	345
	346	*buf = kmalloc(bufsz, GFP_KERNEL);
	347	if (!*buf)
	348	return -ENOMEM;
	349
	350	pos += scnprintf(*buf + pos, bufsz - pos,
	351	"RFH register values:\n");
	352
	353	for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
	354	pos += scnprintf(*buf + pos, bufsz - pos,
	355	"%40s: 0X%08x\n",
	356	get_rfh_string(rfh_tbl[i]),
	357	iwl_read_prph(trans, rfh_tbl[i]));
	358
	359	for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
	360	for (q = 0; q < num_q; q++) {
361	u32 addr = rfh_mq_tbl[i].addr;
362
363	addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
364	pos += scnprintf(*buf + pos, bufsz - pos,
365	"%34s(q %2d): 0X%08x\n",
366	get_rfh_string(addr), q,
367	iwl_read_prph(trans, addr));
368	}
369
370	return pos;
371	}
372	#endif
373
374	IWL_ERR(trans, "RFH register values:\n");
375	for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
376	IWL_ERR(trans, " %34s: 0X%08x\n",
377	get_rfh_string(rfh_tbl[i]),
378	iwl_read_prph(trans, rfh_tbl[i]));
379
380	for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
381	for (q = 0; q < num_q; q++) {
382	u32 addr = rfh_mq_tbl[i].addr;
383
384	addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
385	IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
386	get_rfh_string(addr), q,
387	iwl_read_prph(trans, addr));
388	}
389
390	return 0;
391	}
392
393	static const char *get_fh_string(int cmd)
394	{
313b0a29 IH	395	switch (cmd) {
	396	IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
	397	IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
	398	IWL_CMD(FH_RSCSR_CHNL0_WPTR);
	399	IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
	400	IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
	401	IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
	402	IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
	403	IWL_CMD(FH_TSSR_TX_STATUS_REG);
	404	IWL_CMD(FH_TSSR_TX_ERROR_REG);
	405	default:
	406	return "UNKNOWN";
	407	}
	408	#undef IWL_CMD
	409	}
	410
	411	int iwl_dump_fh(struct iwl_trans trans, char *buf)
	412	{
	413	int i;
	414	static const u32 fh_tbl[] = {
	415	FH_RSCSR_CHNL0_STTS_WPTR_REG,
	416	FH_RSCSR_CHNL0_RBDCB_BASE_REG,
	417	FH_RSCSR_CHNL0_WPTR,
	418	FH_MEM_RCSR_CHNL0_CONFIG_REG,
	419	FH_MEM_RSSR_SHARED_CTRL_REG,
	420	FH_MEM_RSSR_RX_STATUS_REG,
	421	FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
	422	FH_TSSR_TX_STATUS_REG,
	423	FH_TSSR_TX_ERROR_REG
	424	};
	425
f65ebd88 SS	426	if (trans->cfg->mq_rx_supported)
	427	return iwl_dump_rfh(trans, buf);
	428
313b0a29 IH	429	#ifdef CONFIG_IWLWIFI_DEBUGFS
	430	if (buf) {
	431	int pos = 0;
	432	size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
	433
	434	*buf = kmalloc(bufsz, GFP_KERNEL);
	435	if (!*buf)
	436	return -ENOMEM;
	437
	438	pos += scnprintf(*buf + pos, bufsz - pos,
	439	"FH register values:\n");
	440
	441	for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
	442	pos += scnprintf(*buf + pos, bufsz - pos,
	443	" %34s: 0X%08x\n",
	444	get_fh_string(fh_tbl[i]),
	445	iwl_read_direct32(trans, fh_tbl[i]));
	446
	447	return pos;
	448	}
	449	#endif
	450
	451	IWL_ERR(trans, "FH register values:\n");
	452	for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
	453	IWL_ERR(trans, " %34s: 0X%08x\n",
	454	get_fh_string(fh_tbl[i]),
	455	iwl_read_direct32(trans, fh_tbl[i]));
	456
	457	return 0;
	458	}