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Commit 63ef9700 authored by Pradeep P V K's avatar Pradeep P V K Committed by Gerrit - the friendly Code Review server
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mtd: msm_qpic_nand: register msm_nand to panic_notifier 



Register msm_nand to panic notifiers list to dump apss
qpic bam registers information during any subsytem failures.

Change-Id: If717d063b41dc8e75b707574e4f703ea4b41da65
Signed-off-by: default avatarPradeep P V K <pragalla@codeaurora.org>
parent 54ae581c

drivers/mtd/devices/msm_qpic_nand.c

+36 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (C) 2007 Google, Inc.

 * Copyright (c) 2012-2020 The Linux Foundation. All rights reserved.

 * Copyright (c) 2012-2021 The Linux Foundation. All rights reserved.

 */



#include "msm_qpic_nand.h"
@@ -19,6 +19,38 @@ 
#define SMEM_APPS 0

#define ONE_CODEWORD_SIZE 516



static struct device *dev_node;

static int msm_nand_bam_panic_notifier(struct notifier_block *this,

					unsigned long event, void *ptr)

{

	struct msm_nand_info *info = dev_get_drvdata(dev_node);



	pr_info("Dumping APSS bam pipes register dumps\n");

	sps_get_bam_debug_info(info->sps.bam_handle, 93,

			(SPS_BAM_PIPE(0) |

			 SPS_BAM_PIPE(1) |

			 SPS_BAM_PIPE(2) |

			 SPS_BAM_PIPE(3)),

			 0, 2);

	return NOTIFY_DONE;

}



static struct notifier_block msm_nand_bam_panic_blk = {

	.notifier_call = msm_nand_bam_panic_notifier,

};



void msm_nand_bam_register_panic_handler(void)

{

	atomic_notifier_chain_register(&panic_notifier_list,

			&msm_nand_bam_panic_blk);

}



void msm_nand_bam_unregister_panic_handler(void)

{

	atomic_notifier_chain_unregister(&panic_notifier_list,

					&msm_nand_bam_panic_blk);

}



/*

 * Get the DMA memory for requested amount of size. It returns the pointer

 * to free memory available from the allocated pool. Returns NULL if there
@@ -4555,6 +4587,8 @@ static int msm_nand_probe(struct platform_device *pdev) 
	pr_info("Allocated DMA buffer at virt_addr 0x%pK, phys_addr 0x%x\n",

		info->nand_chip.dma_virt_addr, info->nand_chip.dma_phys_addr);

	pr_info("Host capabilities:0x%08x\n", info->nand_chip.caps);

	dev_node = dev;

	msm_nand_bam_register_panic_handler();

	goto out;

free_bam:

	msm_nand_bam_free(info);
@@ -4576,6 +4610,7 @@ static int msm_nand_remove(struct platform_device *pdev) 
{

	struct msm_nand_info *info = dev_get_drvdata(&pdev->dev);



	msm_nand_bam_unregister_panic_handler();

	if (pm_runtime_suspended(&(pdev)->dev))

		pm_runtime_resume(&(pdev)->dev);