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Commit 4460cd9b authored by Maulik Shah's avatar Maulik Shah
Browse files

drivers: mailbox: rpmh: Enhance debug logs 



Enhance debug log to print IRQ pending status at GIC
and tasklet schedule status for rpmh timeout case.

Also print waiting device name when retry to send data.

Change-Id: Ifd83ee87b29bfff682c9facf34c91d186b29e1fd
Signed-off-by: default avatarMaulik Shah <mkshah@codeaurora.org>
parent e1d7d8cb

drivers/mailbox/qcom-rpmh-mailbox.c

+22 −2
Original line number Diff line number Diff line 
/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -128,6 +128,7 @@ struct rsc_drv { 
	const char *name;

	void __iomem *base; /* start address of the RSC's registers */

	void __iomem *reg_base; /* start address for DRV specific register */

	int irq;

	int drv_id;

	struct platform_device *pdev;

	struct tcs_mbox tcs[TCS_TYPE_NR];
@@ -877,6 +878,8 @@ static void dump_tcs_stats(struct rsc_drv *drv) 
{

	int i;

	unsigned long long curr = arch_counter_get_cntvct();

	struct irq_data *rsc_irq_data = irq_get_irq_data(drv->irq);

	bool irq_sts;



	for (i = 0; i < drv->num_tcs; i++) {

		if (!atomic_read(&drv->tcs_in_use[i]))
@@ -890,6 +893,20 @@ static void dump_tcs_stats(struct rsc_drv *drv) 
		print_tcs_regs(drv, i);

		print_response(drv, i);

	}



	if (rsc_irq_data) {

		irq_get_irqchip_state(drv->irq, IRQCHIP_STATE_PENDING,

								&irq_sts);

		pr_warn("HW IRQ %lu is %s at GIC\n", rsc_irq_data->hwirq,

					irq_sts ? "PENDING" : "NOT PENDING");

	}



	if (test_bit(TASKLET_STATE_SCHED, &drv->tasklet.state))

		pr_warn("Tasklet is scheduled for execution\n");

	else if (test_bit(TASKLET_STATE_RUN, &drv->tasklet.state))

		pr_warn("Tasklet is running\n");

	else

		pr_warn("Tasklet is not active\n");

}



static void chan_debug(struct mbox_chan *chan)
@@ -979,7 +996,8 @@ static int chan_tcs_write(struct mbox_chan *chan, void *data) 


	/* If we were just busy waiting for TCS, dump the state and return */

	if (ret == -EBUSY) {

		pr_info_ratelimited("TCS Busy, retrying RPMH message send\n");

		dev_err_ratelimited(chan->cl->dev,

				"TCS Busy, retrying RPMH message send\n");

		ret = -EAGAIN;

	}
@@ -1258,6 +1276,8 @@ static int rsc_drv_probe(struct platform_device *pdev) 
	if (ret)

		return ret;



	drv->irq = irq;



	/* Enable interrupts for AMC TCS */

	write_tcs_reg(drv->reg_base, RSC_DRV_IRQ_ENABLE, 0, 0,

					drv->tcs[ACTIVE_TCS].tcs_mask);