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Commit eb711783 authored by Bhalchandra Gajare's avatar Bhalchandra Gajare Committed by Gerrit - the friendly Code Review server
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ASoC: wcd-cpe-core: Add support for SFR 



Add support to retrieve the SFR (Software Failure Reason) details from
CPE (Codec Processing Engine) once the CPE is unresponsive. This will
help in debugging CPE hang issues.

Change-Id: Ie76ada3afcf8504cc9954a59906f928d1090e39f
Signed-off-by: default avatarBhalchandra Gajare <gajare@codeaurora.org>
parent d6e5f393

sound/soc/codecs/wcd_cpe_core.c

+58 −4
Original line number Diff line number Diff line 
/* Copyright (c) 2014, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2015, 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
@@ -118,6 +118,46 @@ static bool wcd_cpe_lsm_session_active(void) 
	return lsm_active;

}



static int wcd_cpe_get_sfr_dump(struct wcd_cpe_core *core)

{

	struct cpe_svc_mem_segment dump_seg;

	int rc;

	u8 *sfr_dump;



	sfr_dump = kzalloc(core->sfr_buf_size, GFP_KERNEL);

	if (!sfr_dump) {

		dev_err(core->dev,

			"%s: No memory for sfr dump\n",

			__func__);

		goto done;

	}



	dump_seg.type = CPE_SVC_DATA_MEM;

	dump_seg.cpe_addr = core->sfr_buf_addr;

	dump_seg.size = core->sfr_buf_size;

	dump_seg.data = sfr_dump;

	dev_dbg(core->dev,

		"%s: reading SFR from CPE, size = %zu\n",

		__func__, core->sfr_buf_size);



	rc = cpe_svc_ramdump(core->cpe_handle, &dump_seg);

	if (IS_ERR_VALUE(rc)) {

		dev_err(core->dev,

			"%s: Failed to read cpe sfr_dump, err = %d\n",

			__func__, rc);

		goto free_sfr_dump;

	}



	dev_info(core->dev,

		 "%s: cpe_sfr = %s\n", __func__, sfr_dump);



free_sfr_dump:

	kfree(sfr_dump);

done:

	/* Even if SFR dump failed, do not return error */

	return 0;

}



static int wcd_cpe_collect_ramdump(struct wcd_cpe_core *core)

{

	struct cpe_svc_mem_segment dump_seg;
@@ -880,13 +920,15 @@ void wcd_cpe_ssr_work(struct work_struct *work) 
				__func__);

			goto err_ret;

		}

		if (core->ssr_type != WCD_CPE_BUS_DOWN_EVENT &&

		    ramdump_enable) {

		if (core->ssr_type != WCD_CPE_BUS_DOWN_EVENT) {

			wcd_cpe_get_sfr_dump(core);



			/*

			 * Ramdump has to be explicitly enabled

			 * through debugfs and cannot be collected

			 * when bus is down.

			 */

			if (ramdump_enable)

				wcd_cpe_collect_ramdump(core);

		}

	} else {
@@ -1137,6 +1179,7 @@ static void wcd_cpe_svc_event_cb(const struct cpe_svc_notification *param) 
{

	struct snd_soc_codec *codec;

	struct wcd_cpe_core *core;

	struct cpe_svc_boot_event *boot_data;

	bool active_sessions;



	if (!param) {
@@ -1163,6 +1206,16 @@ static void wcd_cpe_svc_event_cb(const struct cpe_svc_notification *param) 
		__func__, param->event, core->ssr_type);



	switch (param->event) {

	case CPE_SVC_BOOT:

		boot_data = (struct cpe_svc_boot_event *)

				param->payload;

		core->sfr_buf_addr = boot_data->debug_address;

		core->sfr_buf_size = boot_data->debug_buffer_size;

		dev_dbg(core->dev,

			"%s: CPE booted, sfr_addr = %d, sfr_size = %zu\n",

			__func__, core->sfr_buf_addr,

			core->sfr_buf_size);

		break;

	case CPE_SVC_ONLINE:

		core->ssr_type = WCD_CPE_ACTIVE;

		dev_dbg(core->dev, "%s CPE is now online\n",
@@ -1554,6 +1607,7 @@ struct wcd_cpe_core *wcd_cpe_init(const char *img_fname, 
	core->cpe_reg_handle = cpe_svc_register(core->cpe_handle,

					wcd_cpe_svc_event_cb,

					CPE_SVC_ONLINE | CPE_SVC_OFFLINE |

					CPE_SVC_BOOT |

					CPE_SVC_CMI_CLIENTS_DEREG,

					"codec cpe handler");

	if (!core->cpe_reg_handle) {

sound/soc/codecs/wcd_cpe_core.h

+5 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.

/* Copyright (c) 2013-2015, 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
@@ -148,6 +148,10 @@ struct wcd_cpe_core { 
	struct ramdump_segment cpe_ramdump_seg;

	dma_addr_t cpe_dump_addr;

	void *cpe_dump_v_addr;



	/* SFR support */

	u32 sfr_buf_addr;

	size_t sfr_buf_size;

};



struct wcd_cpe_params {