d7f5f3c89c
Set up a subdev in the q6v5 modem remoteproc driver that generates event notifications for the IPA driver to use for initialization and recovery following a modem shutdown or crash. A pair of new functions provides a way for the IPA driver to register and deregister a notification callback function that will be called whenever modem events (about to boot, running, about to shut down, etc.) occur. A void pointer value (provided by the IPA driver at registration time) and an event type are supplied to the callback function. One event, MODEM_REMOVING, is signaled whenever the q6v5 driver is about to remove the notification subdevice. It requires the IPA driver de-register its callback. This sub-device is only used by the modem subsystem (MSS) driver, so the code that adds the new subdev and allows registration and deregistration of the notifier is found in "qcom_q6v6_mss.c". Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2019 Linaro Ltd. */
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#ifndef __QCOM_Q6V5_IPA_NOTIFY_H__
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#define __QCOM_Q6V5_IPA_NOTIFY_H__
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#if IS_ENABLED(CONFIG_QCOM_Q6V5_IPA_NOTIFY)
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#include <linux/remoteproc.h>
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enum qcom_rproc_event {
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MODEM_STARTING = 0, /* Modem is about to be started */
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MODEM_RUNNING = 1, /* Startup complete; modem is operational */
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MODEM_STOPPING = 2, /* Modem is about to shut down */
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MODEM_CRASHED = 3, /* Modem has crashed (implies stopping) */
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MODEM_OFFLINE = 4, /* Modem is now offline */
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MODEM_REMOVING = 5, /* Modem is about to be removed */
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};
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typedef void (*qcom_ipa_notify_t)(void *data, enum qcom_rproc_event event);
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struct qcom_rproc_ipa_notify {
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struct rproc_subdev subdev;
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qcom_ipa_notify_t notify;
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void *data;
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};
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/**
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* qcom_add_ipa_notify_subdev() - Register IPA notification subdevice
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* @rproc: rproc handle
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* @ipa_notify: IPA notification subdevice handle
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*
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* Register the @ipa_notify subdevice with the @rproc so modem events
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* can be sent to IPA when they occur.
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*
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* This is defined in "qcom_q6v5_ipa_notify.c".
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*/
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void qcom_add_ipa_notify_subdev(struct rproc *rproc,
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struct qcom_rproc_ipa_notify *ipa_notify);
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/**
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* qcom_remove_ipa_notify_subdev() - Remove IPA SSR subdevice
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* @rproc: rproc handle
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* @ipa_notify: IPA notification subdevice handle
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*
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* This is defined in "qcom_q6v5_ipa_notify.c".
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*/
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void qcom_remove_ipa_notify_subdev(struct rproc *rproc,
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struct qcom_rproc_ipa_notify *ipa_notify);
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/**
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* qcom_register_ipa_notify() - Register IPA notification function
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* @rproc: Remote processor handle
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* @notify: Non-null IPA notification callback function pointer
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* @data: Data supplied to IPA notification callback function
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*
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* @Return: 0 if successful, or a negative error code otherwise
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*
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* This is defined in "qcom_q6v5_mss.c".
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*/
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int qcom_register_ipa_notify(struct rproc *rproc, qcom_ipa_notify_t notify,
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void *data);
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/**
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* qcom_deregister_ipa_notify() - Deregister IPA notification function
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* @rproc: Remote processor handle
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*
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* This is defined in "qcom_q6v5_mss.c".
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*/
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void qcom_deregister_ipa_notify(struct rproc *rproc);
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#else /* !IS_ENABLED(CONFIG_QCOM_Q6V5_IPA_NOTIFY) */
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struct qcom_rproc_ipa_notify { /* empty */ };
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#define qcom_add_ipa_notify_subdev(rproc, ipa_notify) /* no-op */
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#define qcom_remove_ipa_notify_subdev(rproc, ipa_notify) /* no-op */
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#endif /* !IS_ENABLED(CONFIG_QCOM_Q6V5_IPA_NOTIFY) */
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#endif /* !__QCOM_Q6V5_IPA_NOTIFY_H__ */
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