bc0560f6fa
The audio PDR driver is used to control the process domain restart recovery mechanism. The audio SSR driver is used to control the Subsystem Restart recovery mechanism. Both are controlled through the Audio Notifier driver which determines whether PDR or SSR is used and provides the core interface to all audio drivers. Change-Id: I15325c1385eaa0f0cca2c07130f2b4a997d98e1f CRs-Fixed: 1054000 Signed-off-by: Ben Romberger <bromberg@codeaurora.org>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/qdsp6v2/audio_ssr.h>
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#include <soc/qcom/scm.h>
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#include <soc/qcom/subsystem_restart.h>
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#include <soc/qcom/subsystem_notif.h>
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#define SCM_Q6_NMI_CMD 0x1
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static char *audio_ssr_domains[] = {
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"adsp",
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"modem"
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};
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void *audio_ssr_register(int domain_id, struct notifier_block *nb)
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{
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if ((domain_id < 0) ||
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(domain_id >= AUDIO_SSR_DOMAIN_MAX)) {
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pr_err("%s: Invalid service ID %d\n", __func__, domain_id);
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return ERR_PTR(-EINVAL);
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}
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return subsys_notif_register_notifier(
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audio_ssr_domains[domain_id], nb);
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}
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EXPORT_SYMBOL(audio_ssr_register);
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int audio_ssr_deregister(void *handle, struct notifier_block *nb)
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{
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return subsys_notif_unregister_notifier(handle, nb);
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}
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EXPORT_SYMBOL(audio_ssr_deregister);
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void audio_ssr_send_nmi(void *ssr_cb_data)
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{
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struct notif_data *data = (struct notif_data *)ssr_cb_data;
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struct scm_desc desc;
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if (data && data->crashed) {
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/* Send NMI to QDSP6 via an SCM call. */
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if (!is_scm_armv8()) {
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scm_call_atomic1(SCM_SVC_UTIL,
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SCM_Q6_NMI_CMD, 0x1);
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} else {
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desc.args[0] = 0x1;
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desc.arginfo = SCM_ARGS(1);
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scm_call2_atomic(SCM_SIP_FNID(SCM_SVC_UTIL,
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SCM_Q6_NMI_CMD), &desc);
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}
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/* The write should go through before q6 is shutdown */
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mb();
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pr_debug("%s: Q6 NMI was sent.\n", __func__);
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}
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}
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EXPORT_SYMBOL(audio_ssr_send_nmi);
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