remoteproc: q6v5: Extract common resource handling
Shared between all Hexagon V5 based remoteprocs is the handling of the 5 interrupts and the SMP2P stop request, so break this out into a separate function in order to allow these drivers to be cleaned up. Reviewed-by: Rohit kumar <rohitkr@codeaurora.org> Tested-by: Rohit kumar <rohitkr@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson
parent
0e622e8019
commit
3b415c8fb2
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@ -102,6 +102,11 @@ config QCOM_ADSP_PIL
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config QCOM_RPROC_COMMON
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tristate
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config QCOM_Q6V5_COMMON
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tristate
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depends on ARCH_QCOM
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depends on QCOM_SMEM
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config QCOM_Q6V5_PIL
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tristate "Qualcomm Hexagon V5 Peripherial Image Loader"
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depends on OF && ARCH_QCOM
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@ -16,6 +16,7 @@ obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
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obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o
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obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
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obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
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obj-$(CONFIG_QCOM_Q6V5_COMMON) += qcom_q6v5.o
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obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
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obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
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obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
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243
drivers/remoteproc/qcom_q6v5.c
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243
drivers/remoteproc/qcom_q6v5.c
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@ -0,0 +1,243 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Qualcomm Peripheral Image Loader for Q6V5
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*
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* Copyright (C) 2016-2018 Linaro Ltd.
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* Copyright (C) 2014 Sony Mobile Communications AB
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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*/
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/soc/qcom/smem.h>
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#include <linux/soc/qcom/smem_state.h>
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#include <linux/remoteproc.h>
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#include "qcom_q6v5.h"
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/**
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* qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start
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* @q6v5: reference to qcom_q6v5 context to be reinitialized
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*
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* Return: 0 on success, negative errno on failure
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*/
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int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)
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{
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reinit_completion(&q6v5->start_done);
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reinit_completion(&q6v5->stop_done);
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q6v5->running = true;
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q6v5->handover_issued = false;
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enable_irq(q6v5->handover_irq);
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return 0;
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}
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/**
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* qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop
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* @q6v5: reference to qcom_q6v5 context to be unprepared
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*
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* Return: 0 on success, 1 if handover hasn't yet been called
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*/
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int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
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{
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disable_irq(q6v5->handover_irq);
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return !q6v5->handover_issued;
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}
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static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
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{
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struct qcom_q6v5 *q6v5 = data;
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size_t len;
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char *msg;
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/* Sometimes the stop triggers a watchdog rather than a stop-ack */
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if (!q6v5->running) {
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complete(&q6v5->stop_done);
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return IRQ_HANDLED;
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}
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msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
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if (!IS_ERR(msg) && len > 0 && msg[0])
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dev_err(q6v5->dev, "watchdog received: %s\n", msg);
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else
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dev_err(q6v5->dev, "watchdog without message\n");
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rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);
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return IRQ_HANDLED;
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}
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static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
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{
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struct qcom_q6v5 *q6v5 = data;
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size_t len;
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char *msg;
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msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
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if (!IS_ERR(msg) && len > 0 && msg[0])
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dev_err(q6v5->dev, "fatal error received: %s\n", msg);
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else
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dev_err(q6v5->dev, "fatal error without message\n");
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rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR);
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return IRQ_HANDLED;
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}
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static irqreturn_t q6v5_ready_interrupt(int irq, void *data)
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{
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struct qcom_q6v5 *q6v5 = data;
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complete(&q6v5->start_done);
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return IRQ_HANDLED;
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}
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/**
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* qcom_q6v5_wait_for_start() - wait for remote processor start signal
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* @q6v5: reference to qcom_q6v5 context
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* @timeout: timeout to wait for the event, in jiffies
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*
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* qcom_q6v5_unprepare() should not be called when this function fails.
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*
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* Return: 0 on success, -ETIMEDOUT on timeout
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*/
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int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)
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{
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int ret;
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ret = wait_for_completion_timeout(&q6v5->start_done, timeout);
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if (!ret)
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disable_irq(q6v5->handover_irq);
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return !ret ? -ETIMEDOUT : 0;
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}
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static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
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{
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struct qcom_q6v5 *q6v5 = data;
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if (q6v5->handover)
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q6v5->handover(q6v5);
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q6v5->handover_issued = true;
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return IRQ_HANDLED;
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}
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static irqreturn_t q6v5_stop_interrupt(int irq, void *data)
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{
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struct qcom_q6v5 *q6v5 = data;
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complete(&q6v5->stop_done);
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return IRQ_HANDLED;
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}
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/**
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* qcom_q6v5_request_stop() - request the remote processor to stop
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* @q6v5: reference to qcom_q6v5 context
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*
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* Return: 0 on success, negative errno on failure
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*/
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int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5)
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{
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int ret;
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q6v5->running = false;
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qcom_smem_state_update_bits(q6v5->state,
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BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
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ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ);
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qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0);
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return ret == 0 ? -ETIMEDOUT : 0;
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}
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/**
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* qcom_q6v5_init() - initializer of the q6v5 common struct
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* @q6v5: handle to be initialized
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* @pdev: platform_device reference for acquiring resources
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* @rproc: associated remoteproc instance
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* @crash_reason: SMEM id for crash reason string, or 0 if none
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* @handover: function to be called when proxy resources should be released
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*
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* Return: 0 on success, negative errno on failure
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*/
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int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
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struct rproc *rproc, int crash_reason,
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void (*handover)(struct qcom_q6v5 *q6v5))
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{
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int ret;
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q6v5->rproc = rproc;
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q6v5->dev = &pdev->dev;
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q6v5->crash_reason = crash_reason;
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q6v5->handover = handover;
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init_completion(&q6v5->start_done);
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init_completion(&q6v5->stop_done);
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q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq,
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NULL, q6v5_wdog_interrupt,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"q6v5 wdog", q6v5);
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if (ret) {
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dev_err(&pdev->dev, "failed to acquire wdog IRQ\n");
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return ret;
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}
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q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal");
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq,
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NULL, q6v5_fatal_interrupt,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"q6v5 fatal", q6v5);
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if (ret) {
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dev_err(&pdev->dev, "failed to acquire fatal IRQ\n");
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return ret;
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}
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q6v5->ready_irq = platform_get_irq_byname(pdev, "ready");
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq,
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NULL, q6v5_ready_interrupt,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"q6v5 ready", q6v5);
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if (ret) {
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dev_err(&pdev->dev, "failed to acquire ready IRQ\n");
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return ret;
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}
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q6v5->handover_irq = platform_get_irq_byname(pdev, "handover");
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq,
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NULL, q6v5_handover_interrupt,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"q6v5 handover", q6v5);
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if (ret) {
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dev_err(&pdev->dev, "failed to acquire handover IRQ\n");
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return ret;
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}
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disable_irq(q6v5->handover_irq);
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q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack");
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq,
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NULL, q6v5_stop_interrupt,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"q6v5 stop", q6v5);
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if (ret) {
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dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n");
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return ret;
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}
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q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);
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if (IS_ERR(q6v5->state)) {
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dev_err(&pdev->dev, "failed to acquire stop state\n");
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return PTR_ERR(q6v5->state);
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}
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return 0;
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}
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46
drivers/remoteproc/qcom_q6v5.h
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46
drivers/remoteproc/qcom_q6v5.h
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@ -0,0 +1,46 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __QCOM_Q6V5_H__
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#define __QCOM_Q6V5_H__
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#include <linux/kernel.h>
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#include <linux/completion.h>
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struct rproc;
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struct qcom_smem_state;
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struct qcom_q6v5 {
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struct device *dev;
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struct rproc *rproc;
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struct qcom_smem_state *state;
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unsigned stop_bit;
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int wdog_irq;
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int fatal_irq;
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int ready_irq;
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int handover_irq;
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int stop_irq;
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bool handover_issued;
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struct completion start_done;
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struct completion stop_done;
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int crash_reason;
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bool running;
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void (*handover)(struct qcom_q6v5 *q6v5);
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};
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int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
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struct rproc *rproc, int crash_reason,
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void (*handover)(struct qcom_q6v5 *q6v5));
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int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5);
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int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5);
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int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5);
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int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout);
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#endif
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