[linux-2.6-block.git] / drivers / net / ipa / ipa_smp2p.c

// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
 * Copyright (C) 2019-2022 Linaro Ltd.
 */

#include <linux/types.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/panic_notifier.h>
#include <linux/pm_runtime.h>
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>

#include "ipa_smp2p.h"
#include "ipa.h"
#include "ipa_uc.h"

/**
 * DOC: IPA SMP2P communication with the modem
 *
 * SMP2P is a primitive communication mechanism available between the AP and
 * the modem.  The IPA driver uses this for two purposes:  to enable the modem
 * to state that the GSI hardware is ready to use; and to communicate the
 * state of IPA power in the event of a crash.
 *
 * GSI needs to have early initialization completed before it can be used.
 * This initialization is done either by Trust Zone or by the modem.  In the
 * latter case, the modem uses an SMP2P interrupt to tell the AP IPA driver
 * when the GSI is ready to use.
 *
 * The modem is also able to inquire about the current state of IPA
 * power by trigging another SMP2P interrupt to the AP.  We communicate
 * whether power is enabled using two SMP2P state bits--one to indicate
 * the power state (on or off), and a second to indicate the power state
 * bit is valid.  The modem will poll the valid bit until it is set, and
 * at that time records whether the AP has IPA power enabled.
 *
 * Finally, if the AP kernel panics, we update the SMP2P state bits even if
 * we never receive an interrupt from the modem requesting this.
 */

/**
 * struct ipa_smp2p - IPA SMP2P information
 * @ipa:		IPA pointer
 * @valid_state:	SMEM state indicating enabled state is valid
 * @enabled_state:	SMEM state to indicate power is enabled
 * @valid_bit:		Valid bit in 32-bit SMEM state mask
 * @enabled_bit:	Enabled bit in 32-bit SMEM state mask
 * @enabled_bit:	Enabled bit in 32-bit SMEM state mask
 * @clock_query_irq:	IPA interrupt triggered by modem for power query
 * @setup_ready_irq:	IPA interrupt triggered by modem to signal GSI ready
 * @power_on:		Whether IPA power is on
 * @notified:		Whether modem has been notified of power state
 * @setup_disabled:	Whether setup ready interrupt handler is disabled
 * @mutex:		Mutex protecting ready-interrupt/shutdown interlock
 * @panic_notifier:	Panic notifier structure
*/
struct ipa_smp2p {
	struct ipa *ipa;
	struct qcom_smem_state *valid_state;
	struct qcom_smem_state *enabled_state;
	u32 valid_bit;
	u32 enabled_bit;
	u32 clock_query_irq;
	u32 setup_ready_irq;
	bool power_on;
	bool notified;
	bool setup_disabled;
	struct mutex mutex;
	struct notifier_block panic_notifier;
};

/**
 * ipa_smp2p_notify() - use SMP2P to tell modem about IPA power state
 * @smp2p:	SMP2P information
 *
 * This is called either when the modem has requested it (by triggering
 * the modem power query IPA interrupt) or whenever the AP is shutting down
 * (via a panic notifier).  It sets the two SMP2P state bits--one saying
 * whether the IPA power is on, and the other indicating the first bit
 * is valid.
 */
static void ipa_smp2p_notify(struct ipa_smp2p *smp2p)
{
	struct device *dev;
	u32 value;
	u32 mask;

	if (smp2p->notified)
		return;

	dev = &smp2p->ipa->pdev->dev;
	smp2p->power_on = pm_runtime_get_if_active(dev, true) > 0;

	/* Signal whether the IPA power is enabled */
	mask = BIT(smp2p->enabled_bit);
	value = smp2p->power_on ? mask : 0;
	qcom_smem_state_update_bits(smp2p->enabled_state, mask, value);

	/* Now indicate that the enabled flag is valid */
	mask = BIT(smp2p->valid_bit);
	value = mask;
	qcom_smem_state_update_bits(smp2p->valid_state, mask, value);

	smp2p->notified = true;
}

/* Threaded IRQ handler for modem "ipa-clock-query" SMP2P interrupt */
static irqreturn_t ipa_smp2p_modem_clk_query_isr(int irq, void *dev_id)
{
	struct ipa_smp2p *smp2p = dev_id;

	ipa_smp2p_notify(smp2p);

	return IRQ_HANDLED;
}

static int ipa_smp2p_panic_notifier(struct notifier_block *nb,
				    unsigned long action, void *data)
{
	struct ipa_smp2p *smp2p;

	smp2p = container_of(nb, struct ipa_smp2p, panic_notifier);

	ipa_smp2p_notify(smp2p);

	if (smp2p->power_on)
		ipa_uc_panic_notifier(smp2p->ipa);

	return NOTIFY_DONE;
}

static int ipa_smp2p_panic_notifier_register(struct ipa_smp2p *smp2p)
{
	/* IPA panic handler needs to run before modem shuts down */
	smp2p->panic_notifier.notifier_call = ipa_smp2p_panic_notifier;
	smp2p->panic_notifier.priority = INT_MAX;	/* Do it early */

	return atomic_notifier_chain_register(&panic_notifier_list,
					      &smp2p->panic_notifier);
}

static void ipa_smp2p_panic_notifier_unregister(struct ipa_smp2p *smp2p)
{
	atomic_notifier_chain_unregister(&panic_notifier_list,
					 &smp2p->panic_notifier);
}

/* Threaded IRQ handler for modem "ipa-setup-ready" SMP2P interrupt */
static irqreturn_t ipa_smp2p_modem_setup_ready_isr(int irq, void *dev_id)
{
	struct ipa_smp2p *smp2p = dev_id;
	struct device *dev;
	int ret;

	/* Ignore any (spurious) interrupts received after the first */
	if (smp2p->ipa->setup_complete)
		return IRQ_HANDLED;

	/* Power needs to be active for setup */
	dev = &smp2p->ipa->pdev->dev;
	ret = pm_runtime_get_sync(dev);
	if (ret < 0) {
		dev_err(dev, "error %d getting power for setup\n", ret);
		goto out_power_put;
	}

	/* An error here won't cause driver shutdown, so warn if one occurs */
	ret = ipa_setup(smp2p->ipa);
	WARN(ret != 0, "error %d from ipa_setup()\n", ret);

out_power_put:
	pm_runtime_mark_last_busy(dev);
	(void)pm_runtime_put_autosuspend(dev);

	return IRQ_HANDLED;
}

/* Initialize SMP2P interrupts */
static int ipa_smp2p_irq_init(struct ipa_smp2p *smp2p, const char *name,
			      irq_handler_t handler)
{
	struct device *dev = &smp2p->ipa->pdev->dev;
	unsigned int irq;
	int ret;

	ret = platform_get_irq_byname(smp2p->ipa->pdev, name);
	if (ret <= 0)
		return ret ? : -EINVAL;
	irq = ret;

	ret = request_threaded_irq(irq, NULL, handler, 0, name, smp2p);
	if (ret) {
		dev_err(dev, "error %d requesting \"%s\" IRQ\n", ret, name);
		return ret;
	}

	return irq;
}

static void ipa_smp2p_irq_exit(struct ipa_smp2p *smp2p, u32 irq)
{
	free_irq(irq, smp2p);
}

/* Drop the power reference if it was taken in ipa_smp2p_notify() */
static void ipa_smp2p_power_release(struct ipa *ipa)
{
	struct device *dev = &ipa->pdev->dev;

	if (!ipa->smp2p->power_on)
		return;

	pm_runtime_mark_last_busy(dev);
	(void)pm_runtime_put_autosuspend(dev);
	ipa->smp2p->power_on = false;
}

/* Initialize the IPA SMP2P subsystem */
int ipa_smp2p_init(struct ipa *ipa, bool modem_init)
{
	struct qcom_smem_state *enabled_state;
	struct device *dev = &ipa->pdev->dev;
	struct qcom_smem_state *valid_state;
	struct ipa_smp2p *smp2p;
	u32 enabled_bit;
	u32 valid_bit;
	int ret;

	valid_state = qcom_smem_state_get(dev, "ipa-clock-enabled-valid",
					  &valid_bit);
	if (IS_ERR(valid_state))
		return PTR_ERR(valid_state);
	if (valid_bit >= 32)		/* BITS_PER_U32 */
		return -EINVAL;

	enabled_state = qcom_smem_state_get(dev, "ipa-clock-enabled",
					    &enabled_bit);
	if (IS_ERR(enabled_state))
		return PTR_ERR(enabled_state);
	if (enabled_bit >= 32)		/* BITS_PER_U32 */
		return -EINVAL;

	smp2p = kzalloc(sizeof(*smp2p), GFP_KERNEL);
	if (!smp2p)
		return -ENOMEM;

	smp2p->ipa = ipa;

	/* These fields are needed by the power query interrupt
	 * handler, so initialize them now.
	 */
	mutex_init(&smp2p->mutex);
	smp2p->valid_state = valid_state;
	smp2p->valid_bit = valid_bit;
	smp2p->enabled_state = enabled_state;
	smp2p->enabled_bit = enabled_bit;

	/* We have enough information saved to handle notifications */
	ipa->smp2p = smp2p;

	ret = ipa_smp2p_irq_init(smp2p, "ipa-clock-query",
				 ipa_smp2p_modem_clk_query_isr);
	if (ret < 0)
		goto err_null_smp2p;
	smp2p->clock_query_irq = ret;

	ret = ipa_smp2p_panic_notifier_register(smp2p);
	if (ret)
		goto err_irq_exit;

	if (modem_init) {
		/* Result will be non-zero (negative for error) */
		ret = ipa_smp2p_irq_init(smp2p, "ipa-setup-ready",
					 ipa_smp2p_modem_setup_ready_isr);
		if (ret < 0)
			goto err_notifier_unregister;
		smp2p->setup_ready_irq = ret;
	}

	return 0;

err_notifier_unregister:
	ipa_smp2p_panic_notifier_unregister(smp2p);
err_irq_exit:
	ipa_smp2p_irq_exit(smp2p, smp2p->clock_query_irq);
err_null_smp2p:
	ipa->smp2p = NULL;
	mutex_destroy(&smp2p->mutex);
	kfree(smp2p);

	return ret;
}

void ipa_smp2p_exit(struct ipa *ipa)
{
	struct ipa_smp2p *smp2p = ipa->smp2p;

	if (smp2p->setup_ready_irq)
		ipa_smp2p_irq_exit(smp2p, smp2p->setup_ready_irq);
	ipa_smp2p_panic_notifier_unregister(smp2p);
	ipa_smp2p_irq_exit(smp2p, smp2p->clock_query_irq);
	/* We won't get notified any more; drop power reference (if any) */
	ipa_smp2p_power_release(ipa);
	ipa->smp2p = NULL;
	mutex_destroy(&smp2p->mutex);
	kfree(smp2p);
}

void ipa_smp2p_irq_disable_setup(struct ipa *ipa)
{
	struct ipa_smp2p *smp2p = ipa->smp2p;

	if (!smp2p->setup_ready_irq)
		return;

	mutex_lock(&smp2p->mutex);

	if (!smp2p->setup_disabled) {
		disable_irq(smp2p->setup_ready_irq);
		smp2p->setup_disabled = true;
	}

	mutex_unlock(&smp2p->mutex);
}

/* Reset state tracking whether we have notified the modem */
void ipa_smp2p_notify_reset(struct ipa *ipa)
{
	struct ipa_smp2p *smp2p = ipa->smp2p;
	u32 mask;

	if (!smp2p->notified)
		return;

	ipa_smp2p_power_release(ipa);

	/* Reset the power enabled valid flag */
	mask = BIT(smp2p->valid_bit);
	qcom_smem_state_update_bits(smp2p->valid_state, mask, 0);

	/* Mark the power disabled for good measure... */
	mask = BIT(smp2p->enabled_bit);
	qcom_smem_state_update_bits(smp2p->enabled_state, mask, 0);

	smp2p->notified = false;
}
Commit	Line	Data
530f9216 AE	1	// SPDX-License-Identifier: GPL-2.0
	2
	3	/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
a4388da5	4	* Copyright (C) 2019-2022 Linaro Ltd.
530f9216 AE	5	*/
	6
	7	#include <linux/types.h>
	8	#include <linux/device.h>
	9	#include <linux/interrupt.h>
	10	#include <linux/notifier.h>
f39650de	11	#include <linux/panic_notifier.h>
0d08026a	12	#include <linux/pm_runtime.h>
530f9216 AE	13	#include <linux/soc/qcom/smem.h>
	14	#include <linux/soc/qcom/smem_state.h>
	15
	16	#include "ipa_smp2p.h"
	17	#include "ipa.h"
	18	#include "ipa_uc.h"
530f9216 AE	19
	20	/**
	21	* DOC: IPA SMP2P communication with the modem
	22	*
	23	* SMP2P is a primitive communication mechanism available between the AP and
	24	* the modem. The IPA driver uses this for two purposes: to enable the modem
	25	* to state that the GSI hardware is ready to use; and to communicate the
7aa0e8b8	26	* state of IPA power in the event of a crash.
530f9216 AE	27	*
	28	* GSI needs to have early initialization completed before it can be used.
	29	* This initialization is done either by Trust Zone or by the modem. In the
	30	* latter case, the modem uses an SMP2P interrupt to tell the AP IPA driver
	31	* when the GSI is ready to use.
	32	*
7aa0e8b8 AE	33	* The modem is also able to inquire about the current state of IPA
	34	* power by trigging another SMP2P interrupt to the AP. We communicate
	35	* whether power is enabled using two SMP2P state bits--one to indicate
	36	* the power state (on or off), and a second to indicate the power state
	37	* bit is valid. The modem will poll the valid bit until it is set, and
	38	* at that time records whether the AP has IPA power enabled.
530f9216 AE	39	*
	40	* Finally, if the AP kernel panics, we update the SMP2P state bits even if
	41	* we never receive an interrupt from the modem requesting this.
	42	*/
	43
	44	/**
	45	* struct ipa_smp2p - IPA SMP2P information
	46	* @ipa: IPA pointer
	47	* @valid_state: SMEM state indicating enabled state is valid
7aa0e8b8	48	* @enabled_state: SMEM state to indicate power is enabled
530f9216 AE	49	* @valid_bit: Valid bit in 32-bit SMEM state mask
	50	* @enabled_bit: Enabled bit in 32-bit SMEM state mask
	51	* @enabled_bit: Enabled bit in 32-bit SMEM state mask
7aa0e8b8	52	* @clock_query_irq: IPA interrupt triggered by modem for power query
530f9216	53	* @setup_ready_irq: IPA interrupt triggered by modem to signal GSI ready
7aa0e8b8 AE	54	* @power_on: Whether IPA power is on
7aa0e8b8 AE	55	* @notified: Whether modem has been notified of power state
33a15310	56	* @setup_disabled: Whether setup ready interrupt handler is disabled
16bb1b50	57	* @mutex: Mutex protecting ready-interrupt/shutdown interlock
530f9216 AE	58	* @panic_notifier: Panic notifier structure
	59	*/
	60	struct ipa_smp2p {
	61	struct ipa *ipa;
	62	struct qcom_smem_state *valid_state;
	63	struct qcom_smem_state *enabled_state;
	64	u32 valid_bit;
	65	u32 enabled_bit;
	66	u32 clock_query_irq;
	67	u32 setup_ready_irq;
7aa0e8b8	68	bool power_on;
530f9216	69	bool notified;
33a15310	70	bool setup_disabled;
530f9216 AE	71	struct mutex mutex;
	72	struct notifier_block panic_notifier;
	73	};
	74
	75	/**
7aa0e8b8	76	* ipa_smp2p_notify() - use SMP2P to tell modem about IPA power state
530f9216 AE	77	* @smp2p: SMP2P information
	78	*
	79	* This is called either when the modem has requested it (by triggering
7aa0e8b8	80	* the modem power query IPA interrupt) or whenever the AP is shutting down
530f9216	81	* (via a panic notifier). It sets the two SMP2P state bits--one saying
7aa0e8b8	82	* whether the IPA power is on, and the other indicating the first bit
530f9216 AE	83	* is valid.
	84	*/
	85	static void ipa_smp2p_notify(struct ipa_smp2p *smp2p)
	86	{
0d08026a	87	struct device *dev;
530f9216 AE	88	u32 value;
	89	u32 mask;
	90
	91	if (smp2p->notified)
	92	return;
	93
0d08026a	94	dev = &smp2p->ipa->pdev->dev;
7aa0e8b8	95	smp2p->power_on = pm_runtime_get_if_active(dev, true) > 0;
530f9216	96
7aa0e8b8	97	/* Signal whether the IPA power is enabled */
530f9216	98	mask = BIT(smp2p->enabled_bit);
7aa0e8b8	99	value = smp2p->power_on ? mask : 0;
530f9216 AE	100	qcom_smem_state_update_bits(smp2p->enabled_state, mask, value);
	101
	102	/* Now indicate that the enabled flag is valid */
	103	mask = BIT(smp2p->valid_bit);
	104	value = mask;
	105	qcom_smem_state_update_bits(smp2p->valid_state, mask, value);
	106
	107	smp2p->notified = true;
	108	}
	109
	110	/* Threaded IRQ handler for modem "ipa-clock-query" SMP2P interrupt */
	111	static irqreturn_t ipa_smp2p_modem_clk_query_isr(int irq, void *dev_id)
	112	{
	113	struct ipa_smp2p *smp2p = dev_id;
	114
	115	ipa_smp2p_notify(smp2p);
	116
	117	return IRQ_HANDLED;
	118	}
	119
	120	static int ipa_smp2p_panic_notifier(struct notifier_block *nb,
	121	unsigned long action, void *data)
	122	{
	123	struct ipa_smp2p *smp2p;
	124
	125	smp2p = container_of(nb, struct ipa_smp2p, panic_notifier);
	126
	127	ipa_smp2p_notify(smp2p);
	128
7aa0e8b8	129	if (smp2p->power_on)
530f9216 AE	130	ipa_uc_panic_notifier(smp2p->ipa);
	131
	132	return NOTIFY_DONE;
	133	}
	134
	135	static int ipa_smp2p_panic_notifier_register(struct ipa_smp2p *smp2p)
	136	{
	137	/* IPA panic handler needs to run before modem shuts down */
	138	smp2p->panic_notifier.notifier_call = ipa_smp2p_panic_notifier;
	139	smp2p->panic_notifier.priority = INT_MAX; /* Do it early */
	140
	141	return atomic_notifier_chain_register(&panic_notifier_list,
	142	&smp2p->panic_notifier);
	143	}
	144
	145	static void ipa_smp2p_panic_notifier_unregister(struct ipa_smp2p *smp2p)
	146	{
	147	atomic_notifier_chain_unregister(&panic_notifier_list,
	148	&smp2p->panic_notifier);
	149	}
	150
	151	/* Threaded IRQ handler for modem "ipa-setup-ready" SMP2P interrupt */
	152	static irqreturn_t ipa_smp2p_modem_setup_ready_isr(int irq, void *dev_id)
	153	{
	154	struct ipa_smp2p *smp2p = dev_id;
c43adc75	155	struct device *dev;
7ebd168c	156	int ret;
530f9216	157
33a15310 AE	158	/* Ignore any (spurious) interrupts received after the first */
	159	if (smp2p->ipa->setup_complete)
	160	return IRQ_HANDLED;
cf8dfe6a	161
c43adc75 AE	162	/* Power needs to be active for setup */
	163	dev = &smp2p->ipa->pdev->dev;
	164	ret = pm_runtime_get_sync(dev);
	165	if (ret < 0) {
	166	dev_err(dev, "error %d getting power for setup\n", ret);
	167	goto out_power_put;
	168	}
cf8dfe6a	169
7ebd168c AE	170	/* An error here won't cause driver shutdown, so warn if one occurs */
	171	ret = ipa_setup(smp2p->ipa);
	172	WARN(ret != 0, "error %d from ipa_setup()\n", ret);
530f9216	173
c43adc75	174	out_power_put:
1aac309d AE	175	pm_runtime_mark_last_busy(dev);
1aac309d AE	176	(void)pm_runtime_put_autosuspend(dev);
530f9216 AE	177
	178	return IRQ_HANDLED;
	179	}
	180
	181	/* Initialize SMP2P interrupts */
	182	static int ipa_smp2p_irq_init(struct ipa_smp2p smp2p, const char name,
	183	irq_handler_t handler)
	184	{
	185	struct device *dev = &smp2p->ipa->pdev->dev;
	186	unsigned int irq;
	187	int ret;
	188
	189	ret = platform_get_irq_byname(smp2p->ipa->pdev, name);
950fd045	190	if (ret <= 0)
530f9216	191	return ret ? : -EINVAL;
530f9216 AE	192	irq = ret;
	193
	194	ret = request_threaded_irq(irq, NULL, handler, 0, name, smp2p);
	195	if (ret) {
	196	dev_err(dev, "error %d requesting \"%s\" IRQ\n", ret, name);
	197	return ret;
	198	}
	199
	200	return irq;
	201	}
	202
	203	static void ipa_smp2p_irq_exit(struct ipa_smp2p *smp2p, u32 irq)
	204	{
	205	free_irq(irq, smp2p);
	206	}
	207
7aa0e8b8 AE	208	/* Drop the power reference if it was taken in ipa_smp2p_notify() */
7aa0e8b8 AE	209	static void ipa_smp2p_power_release(struct ipa *ipa)
530f9216	210	{
1aac309d AE	211	struct device *dev = &ipa->pdev->dev;
1aac309d AE	212
7aa0e8b8	213	if (!ipa->smp2p->power_on)
530f9216 AE	214	return;
530f9216 AE	215
1aac309d AE	216	pm_runtime_mark_last_busy(dev);
1aac309d AE	217	(void)pm_runtime_put_autosuspend(dev);
7aa0e8b8	218	ipa->smp2p->power_on = false;
530f9216 AE	219	}
	220
	221	/* Initialize the IPA SMP2P subsystem */
	222	int ipa_smp2p_init(struct ipa *ipa, bool modem_init)
	223	{
	224	struct qcom_smem_state *enabled_state;
	225	struct device *dev = &ipa->pdev->dev;
	226	struct qcom_smem_state *valid_state;
	227	struct ipa_smp2p *smp2p;
	228	u32 enabled_bit;
	229	u32 valid_bit;
	230	int ret;
	231
	232	valid_state = qcom_smem_state_get(dev, "ipa-clock-enabled-valid",
	233	&valid_bit);
	234	if (IS_ERR(valid_state))
	235	return PTR_ERR(valid_state);
	236	if (valid_bit >= 32) /* BITS_PER_U32 */
	237	return -EINVAL;
	238
	239	enabled_state = qcom_smem_state_get(dev, "ipa-clock-enabled",
	240	&enabled_bit);
	241	if (IS_ERR(enabled_state))
	242	return PTR_ERR(enabled_state);
	243	if (enabled_bit >= 32) /* BITS_PER_U32 */
	244	return -EINVAL;
	245
	246	smp2p = kzalloc(sizeof(*smp2p), GFP_KERNEL);
	247	if (!smp2p)
	248	return -ENOMEM;
	249
	250	smp2p->ipa = ipa;
	251
7aa0e8b8	252	/* These fields are needed by the power query interrupt
530f9216 AE	253	* handler, so initialize them now.
	254	*/
	255	mutex_init(&smp2p->mutex);
	256	smp2p->valid_state = valid_state;
	257	smp2p->valid_bit = valid_bit;
	258	smp2p->enabled_state = enabled_state;
	259	smp2p->enabled_bit = enabled_bit;
	260
	261	/* We have enough information saved to handle notifications */
	262	ipa->smp2p = smp2p;
	263
	264	ret = ipa_smp2p_irq_init(smp2p, "ipa-clock-query",
	265	ipa_smp2p_modem_clk_query_isr);
	266	if (ret < 0)
	267	goto err_null_smp2p;
	268	smp2p->clock_query_irq = ret;
	269
	270	ret = ipa_smp2p_panic_notifier_register(smp2p);
	271	if (ret)
	272	goto err_irq_exit;
	273
	274	if (modem_init) {
	275	/* Result will be non-zero (negative for error) */
	276	ret = ipa_smp2p_irq_init(smp2p, "ipa-setup-ready",
	277	ipa_smp2p_modem_setup_ready_isr);
	278	if (ret < 0)
	279	goto err_notifier_unregister;
	280	smp2p->setup_ready_irq = ret;
	281	}
	282
	283	return 0;
	284
	285	err_notifier_unregister:
	286	ipa_smp2p_panic_notifier_unregister(smp2p);
	287	err_irq_exit:
	288	ipa_smp2p_irq_exit(smp2p, smp2p->clock_query_irq);
	289	err_null_smp2p:
	290	ipa->smp2p = NULL;
	291	mutex_destroy(&smp2p->mutex);
	292	kfree(smp2p);
	293
	294	return ret;
	295	}
	296
	297	void ipa_smp2p_exit(struct ipa *ipa)
	298	{
	299	struct ipa_smp2p *smp2p = ipa->smp2p;
	300
	301	if (smp2p->setup_ready_irq)
	302	ipa_smp2p_irq_exit(smp2p, smp2p->setup_ready_irq);
	303	ipa_smp2p_panic_notifier_unregister(smp2p);
	304	ipa_smp2p_irq_exit(smp2p, smp2p->clock_query_irq);
7aa0e8b8 AE	305	/* We won't get notified any more; drop power reference (if any) */
7aa0e8b8 AE	306	ipa_smp2p_power_release(ipa);
530f9216 AE	307	ipa->smp2p = NULL;
	308	mutex_destroy(&smp2p->mutex);
	309	kfree(smp2p);
	310	}
	311
8afc7e47	312	void ipa_smp2p_irq_disable_setup(struct ipa *ipa)
530f9216 AE	313	{
	314	struct ipa_smp2p *smp2p = ipa->smp2p;
	315
	316	if (!smp2p->setup_ready_irq)
	317	return;
	318
	319	mutex_lock(&smp2p->mutex);
	320
33a15310 AE	321	if (!smp2p->setup_disabled) {
	322	disable_irq(smp2p->setup_ready_irq);
	323	smp2p->setup_disabled = true;
	324	}
530f9216 AE	325
	326	mutex_unlock(&smp2p->mutex);
	327	}
	328
	329	/* Reset state tracking whether we have notified the modem */
	330	void ipa_smp2p_notify_reset(struct ipa *ipa)
	331	{
	332	struct ipa_smp2p *smp2p = ipa->smp2p;
	333	u32 mask;
	334
	335	if (!smp2p->notified)
	336	return;
	337
7aa0e8b8	338	ipa_smp2p_power_release(ipa);
530f9216	339
7aa0e8b8	340	/* Reset the power enabled valid flag */
530f9216 AE	341	mask = BIT(smp2p->valid_bit);
	342	qcom_smem_state_update_bits(smp2p->valid_state, mask, 0);
	343
7aa0e8b8	344	/* Mark the power disabled for good measure... */
530f9216 AE	345	mask = BIT(smp2p->enabled_bit);
	346	qcom_smem_state_update_bits(smp2p->enabled_state, mask, 0);
	347
	348	smp2p->notified = false;
	349	}