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Commit 0c54c1c5 authored by Chris Lew's avatar Chris Lew Committed by Gerrit - the friendly Code Review server
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soc: qcom: smp2p: Add IPC logging support 



Add IPC logs to track bit state entries. These logs will help detect
issues in remote processor bootup.

Change-Id: I31a549532122e0ad7e4c9da454ee65c7b48fdd1d
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent 240c5b21

drivers/soc/qcom/smp2p.c

+19 −0
Original line number Diff line number Diff line
@@ -19,6 +19,8 @@ 
#include <linux/soc/qcom/smem_state.h>

#include <linux/spinlock.h>



#include <linux/ipc_logging.h>



/*

 * The Shared Memory Point to Point (SMP2P) protocol facilitates communication

 * of a single 32-bit value between two processors.  Each value has a single
@@ -158,6 +160,14 @@ struct qcom_smp2p { 
	struct list_head outbound;

};



static void *ilc;

#define SMP2P_LOG_PAGE_CNT 2

#define SMP2P_INFO(x, ...)	\

do {	\

	if (ilc) \

		ipc_log_string(ilc, "[%s]: "x, __func__, ##__VA_ARGS__); \

} while (0)



static void qcom_smp2p_kick(struct qcom_smp2p *smp2p)

{

	/* Make sure any updated data is written before the kick */
@@ -183,6 +193,7 @@ static bool qcom_smp2p_check_ssr(struct qcom_smp2p *smp2p) 
	if (restart == smp2p->ssr_ack)

		return false;



	SMP2P_INFO("%d: SSR DETECTED\n", smp2p->remote_pid);

	return true;

}
@@ -216,6 +227,8 @@ static void qcom_smp2p_negotiate(struct qcom_smp2p *smp2p) 
			smp2p->ssr_ack_enabled = true;



		smp2p->open = true;

		SMP2P_INFO("%d: state=open ssr_ack=%d\n", smp2p->remote_pid,

			   smp2p->ssr_ack_enabled);

	}

}
@@ -257,6 +270,9 @@ static void qcom_smp2p_notify_in(struct qcom_smp2p *smp2p) 
		if (!status)

			continue;



		SMP2P_INFO("%d: %s: status:%0x val:%0x\n",

			   smp2p->remote_pid, entry->name, status, val);



		for_each_set_bit(i, &status, 32) {

			if ((val & BIT(i) && test_bit(i, entry->irq_rising)) ||

			    (!(val & BIT(i)) && test_bit(i, entry->irq_falling))) {
@@ -528,6 +544,9 @@ static int qcom_smp2p_probe(struct platform_device *pdev) 
	const char *key;

	int ret;



	if (!ilc)

		ilc = ipc_log_context_create(SMP2P_LOG_PAGE_CNT, "smp2p", 0);



	smp2p = devm_kzalloc(&pdev->dev, sizeof(*smp2p), GFP_KERNEL);

	if (!smp2p)

		return -ENOMEM;