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Date:   Wed, 08 Aug 2018 16:11:07 -0700
From:   vnkgutta@...eaurora.org
To:     evgreen@...omium.org, robh@...nel.org, mchehab@...nel.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        andy.gross@...aro.org, david.brown@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, tsoni@...eaurora.org,
        ckadabi@...eaurora.org, rishabhb@...eaurora.org, bp@...en8.de
Subject: Re: [PATCH v1 3/4] drivers: edac: Add EDAC driver support for QCOM
 SoCs


Reminder. Would someone review this EDAC patch series?

Thanks,
Narendra

On 2018-08-01 13:33, Venkata Narendra Kumar Gutta wrote:
> From: Channagoud Kadabi <ckadabi@...eaurora.org>
> 
> Add error reporting driver for SBEs and DBEs. As of now, this driver
> supports erp for Last Level Cache Controller (LLCC). This driver takes
> care of dumping registers and adding config options to enable and
> disable panic when the errors happen in cache.
> 
> Co-developed-by: Venkata Narendra Kumar Gutta <vnkgutta@...eaurora.org>
> Signed-off-by: Venkata Narendra Kumar Gutta <vnkgutta@...eaurora.org>
> Signed-off-by: Channagoud Kadabi <ckadabi@...eaurora.org>
> ---
>  MAINTAINERS              |   7 +
>  drivers/edac/Kconfig     |  28 +++
>  drivers/edac/Makefile    |   1 +
>  drivers/edac/qcom_edac.c | 507 
> +++++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 543 insertions(+)
>  create mode 100644 drivers/edac/qcom_edac.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index f6a9b08..68b3484 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5227,6 +5227,13 @@ L:	linux-edac@...r.kernel.org
>  S:	Maintained
>  F:	drivers/edac/ti_edac.c
> 
> +EDAC-QUALCOMM
> +M:	Channagoud Kadabi<ckadabi@...eaurora.org>
> +M:	Venkata Narendra Kumar Gutta<vnkgutta@...eaurora.org>
> +L:	linux-arm-msm@...r.kernel.org
> +S:	Maintained
> +F:	drivers/edac/qcom_edac.c
> +
>  EDIROL UA-101/UA-1000 DRIVER
>  M:	Clemens Ladisch <clemens@...isch.de>
>  L:	alsa-devel@...a-project.org (moderated for non-subscribers)
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index 57304b2..c654b0e 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -460,4 +460,32 @@ config EDAC_TI
>  	  Support for error detection and correction on the
>            TI SoCs.
> 
> +config EDAC_QCOM
> +	depends on EDAC=y
> +	tristate "QCOM EDAC Controller"
> +	help
> +		Support for error detection and correction on the
> +		QCOM SoCs.
> +
> +config EDAC_QCOM_LLCC
> +	depends on EDAC_QCOM=y && QCOM_LLCC
> +	tristate "QCOM EDAC Controller for LLCC Cache"
> +	help
> +		Support for error detection and correction on the
> +		QCOM LLCC cache. Report errors caught by LLCC ECC
> +		mechanism.
> +
> +		For debugging issues having to do with stability and overall system
> +		health, you should probably say 'Y' here.
> +
> +config EDAC_QCOM_LLCC_PANIC_ON_UE
> +	depends on EDAC_QCOM_LLCC
> +	bool "Panic on uncorrectable errors - qcom llcc"
> +	help
> +		Forcibly cause a kernel panic if an uncorrectable error (UE) is
> +		detected. This can reduce debugging times on hardware which may be
> +		operating at voltages or frequencies outside normal specification.
> +
> +		For production builds, you should probably say 'N' here.
> +
>  endif # EDAC
> diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
> index 02b43a7..716096d 100644
> --- a/drivers/edac/Makefile
> +++ b/drivers/edac/Makefile
> @@ -77,3 +77,4 @@ obj-$(CONFIG_EDAC_ALTERA)		+= altera_edac.o
>  obj-$(CONFIG_EDAC_SYNOPSYS)		+= synopsys_edac.o
>  obj-$(CONFIG_EDAC_XGENE)		+= xgene_edac.o
>  obj-$(CONFIG_EDAC_TI)			+= ti_edac.o
> +obj-$(CONFIG_EDAC_QCOM)			+= qcom_edac.o
> diff --git a/drivers/edac/qcom_edac.c b/drivers/edac/qcom_edac.c
> new file mode 100644
> index 0000000..cf3e2b0
> --- /dev/null
> +++ b/drivers/edac/qcom_edac.c
> @@ -0,0 +1,507 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018, The Linux Foundation. All rights reserved.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/edac.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/smp.h>
> +#include <linux/regmap.h>
> +#include <linux/interrupt.h>
> +#include <linux/soc/qcom/llcc-qcom.h>
> +#include "edac_mc.h"
> +#include "edac_device.h"
> +
> +#ifdef CONFIG_EDAC_QCOM_LLCC_PANIC_ON_UE
> +#define LLCC_ERP_PANIC_ON_UE            1
> +#else
> +#define LLCC_ERP_PANIC_ON_UE            0
> +#endif
> +
> +#define EDAC_LLCC                       "qcom_llcc"
> +
> +#define TRP_SYN_REG_CNT                 6
> +
> +#define DRP_SYN_REG_CNT                 8
> +
> +#define LLCC_COMMON_STATUS0             0x0003000C
> +#define LLCC_LB_CNT_MASK                GENMASK(31, 28)
> +#define LLCC_LB_CNT_SHIFT               28
> +
> +/* single & Double Bit syndrome register offsets */
> +#define TRP_ECC_SB_ERR_SYN0             0x0002304C
> +#define TRP_ECC_DB_ERR_SYN0             0x00020370
> +#define DRP_ECC_SB_ERR_SYN0             0x0004204C
> +#define DRP_ECC_DB_ERR_SYN0             0x00042070
> +
> +/* Error register offsets */
> +#define TRP_ECC_ERROR_STATUS1           0x00020348
> +#define TRP_ECC_ERROR_STATUS0           0x00020344
> +#define DRP_ECC_ERROR_STATUS1           0x00042048
> +#define DRP_ECC_ERROR_STATUS0           0x00042044
> +
> +/* TRP, DRP interrupt register offsets */
> +#define DRP_INTERRUPT_STATUS            0x00041000
> +#define TRP_INTERRUPT_0_STATUS          0x00020480
> +#define DRP_INTERRUPT_CLEAR             0x00041008
> +#define DRP_ECC_ERROR_CNTR_CLEAR        0x00040004
> +#define TRP_INTERRUPT_0_CLEAR           0x00020484
> +#define TRP_ECC_ERROR_CNTR_CLEAR        0x00020440
> +
> +/* Mask and shift macros */
> +#define ECC_DB_ERR_COUNT_MASK           GENMASK(4, 0)
> +#define ECC_DB_ERR_WAYS_MASK            GENMASK(31, 16)
> +#define ECC_DB_ERR_WAYS_SHIFT           BIT(4)
> +
> +#define ECC_SB_ERR_COUNT_MASK           GENMASK(23, 16)
> +#define ECC_SB_ERR_COUNT_SHIFT          BIT(4)
> +#define ECC_SB_ERR_WAYS_MASK            GENMASK(15, 0)
> +
> +#define SB_ECC_ERROR                    BIT(0)
> +#define DB_ECC_ERROR                    BIT(1)
> +
> +#define DRP_TRP_INT_CLEAR               GENMASK(1, 0)
> +#define DRP_TRP_CNT_CLEAR               GENMASK(1, 0)
> +
> +/* Config registers offsets*/
> +#define DRP_ECC_ERROR_CFG               0x00040000
> +
> +/* TRP, DRP interrupt register offsets */
> +#define CMN_INTERRUPT_0_ENABLE          0x0003001C
> +#define CMN_INTERRUPT_2_ENABLE          0x0003003C
> +#define TRP_INTERRUPT_0_ENABLE          0x00020488
> +#define DRP_INTERRUPT_ENABLE            0x0004100C
> +
> +#define SB_ERROR_THRESHOLD              0x1
> +#define SB_ERROR_THRESHOLD_SHIFT        24
> +#define SB_DB_TRP_INTERRUPT_ENABLE      0x3
> +#define TRP0_INTERRUPT_ENABLE           0x1
> +#define DRP0_INTERRUPT_ENABLE           BIT(6)
> +#define SB_DB_DRP_INTERRUPT_ENABLE      0x3
> +
> +
> +enum {
> +	LLCC_DRAM_CE = 0,
> +	LLCC_DRAM_UE,
> +	LLCC_TRAM_CE,
> +	LLCC_TRAM_UE,
> +};
> +
> +struct errors_edac {
> +	const char *msg;
> +	void (*func)(struct edac_device_ctl_info *edev_ctl,
> +				int inst_nr, int block_nr, const char *msg);
> +};
> +
> +static const struct errors_edac errors[] = {
> +	{"LLCC Data RAM correctable Error", edac_device_handle_ce},
> +	{"LLCC Data RAM uncorrectable Error", edac_device_handle_ue},
> +	{"LLCC Tag RAM correctable Error", edac_device_handle_ce},
> +	{"LLCC Tag RAM uncorrectable Error", edac_device_handle_ue},
> +};
> +
> +static int qcom_llcc_core_setup(struct regmap *llcc_bcast_regmap)
> +{
> +	u32 sb_err_threshold;
> +	int ret;
> +
> +	/* Enable TRP in instance 2 of common interrupt enable register */
> +	ret = regmap_update_bits(llcc_bcast_regmap, CMN_INTERRUPT_2_ENABLE,
> +				 TRP0_INTERRUPT_ENABLE,
> +				 TRP0_INTERRUPT_ENABLE);
> +	if (ret)
> +		return ret;
> +
> +	/* Enable ECC interrupts on Tag Ram */
> +	ret = regmap_update_bits(llcc_bcast_regmap, TRP_INTERRUPT_0_ENABLE,
> +				 SB_DB_TRP_INTERRUPT_ENABLE,
> +				 SB_DB_TRP_INTERRUPT_ENABLE);
> +	if (ret)
> +		return ret;
> +
> +	/* Enable SB error for Data RAM */
> +	sb_err_threshold = (SB_ERROR_THRESHOLD << SB_ERROR_THRESHOLD_SHIFT);
> +	ret = regmap_write(llcc_bcast_regmap, DRP_ECC_ERROR_CFG,
> +			   sb_err_threshold);
> +	if (ret)
> +		return ret;
> +
> +	/* Enable DRP in instance 2 of common interrupt enable register */
> +	ret = regmap_update_bits(llcc_bcast_regmap, CMN_INTERRUPT_2_ENABLE,
> +				 DRP0_INTERRUPT_ENABLE,
> +				 DRP0_INTERRUPT_ENABLE);
> +	if (ret)
> +		return ret;
> +
> +	/* Enable ECC interrupts on Data Ram */
> +	ret = regmap_write(llcc_bcast_regmap, DRP_INTERRUPT_ENABLE,
> +			   SB_DB_DRP_INTERRUPT_ENABLE);
> +	return ret;
> +}
> +
> +/* Clear the error interrupt and counter registers */
> +static int qcom_llcc_clear_errors(int err_type, struct llcc_drv_data 
> *drv)
> +{
> +	int ret = 0;
> +
> +	switch (err_type) {
> +	case LLCC_DRAM_CE:
> +	case LLCC_DRAM_UE:
> +		/* Clear the interrupt */
> +		ret = regmap_write(drv->bcast_regmap, DRP_INTERRUPT_CLEAR,
> +				   DRP_TRP_INT_CLEAR);
> +		if (ret)
> +			return ret;
> +
> +		/* Clear the counters */
> +		ret = regmap_write(drv->bcast_regmap, DRP_ECC_ERROR_CNTR_CLEAR,
> +				   DRP_TRP_CNT_CLEAR);
> +		if (ret)
> +			return ret;
> +		break;
> +	case LLCC_TRAM_CE:
> +	case LLCC_TRAM_UE:
> +		ret = regmap_write(drv->bcast_regmap, TRP_INTERRUPT_0_CLEAR,
> +				   DRP_TRP_INT_CLEAR);
> +		if (ret)
> +			return ret;
> +
> +		ret = regmap_write(drv->bcast_regmap, TRP_ECC_ERROR_CNTR_CLEAR,
> +				   DRP_TRP_CNT_CLEAR);
> +		if (ret)
> +			return ret;
> +		break;
> +	}
> +	return ret;
> +}
> +
> +/* Dump syndrome registers for tag Ram Double bit errors */
> +static int dump_trp_db_syn_reg(struct llcc_drv_data *drv, u32 bank)
> +{
> +	int db_err_cnt, db_err_ways, ret, i;
> +	u32 synd_reg, synd_val;
> +
> +	for (i = 0; i < TRP_SYN_REG_CNT; i++) {
> +		synd_reg = TRP_ECC_DB_ERR_SYN0 + (i * 4);
> +		ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg,
> +				  &synd_val);
> +		if (ret)
> +			return ret;
> +		edac_printk(KERN_CRIT, EDAC_LLCC, "TRP_ECC_SYN%d: 0x%8x\n",
> +			    i, synd_val);
> +	}
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + TRP_ECC_ERROR_STATUS1,
> +			  &db_err_cnt);
> +	if (ret)
> +		return ret;
> +	db_err_cnt = (db_err_cnt & ECC_DB_ERR_COUNT_MASK);
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Double-Bit error count: 0x%4x\n",
> +		    db_err_cnt);
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + TRP_ECC_ERROR_STATUS0,
> +			  &db_err_ways);
> +	if (ret)
> +		return ret;
> +	db_err_ways = (db_err_ways & ECC_DB_ERR_WAYS_MASK);
> +	db_err_ways >>= ECC_DB_ERR_WAYS_SHIFT;
> +
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Double-Bit error ways: 0x%4x\n",
> +		    db_err_ways);
> +
> +	return ret;
> +}
> +
> +/* Dump syndrome register for tag Ram Single Bit Errors */
> +static int dump_trp_sb_syn_reg(struct llcc_drv_data *drv, u32 bank)
> +{
> +	int sb_err_cnt, sb_err_ways, ret, i;
> +	u32 synd_reg, synd_val;
> +
> +	for (i = 0; i < TRP_SYN_REG_CNT; i++) {
> +		synd_reg = TRP_ECC_SB_ERR_SYN0 + (i * 4);
> +		ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg,
> +				  &synd_val);
> +		if (ret)
> +			return ret;
> +		edac_printk(KERN_CRIT, EDAC_LLCC, "TRP_ECC_SYN%d: 0x%8x\n", i,
> +			    synd_val);
> +	}
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + TRP_ECC_ERROR_STATUS1,
> +			  &sb_err_cnt);
> +	if (ret)
> +		return ret;
> +	sb_err_cnt = (sb_err_cnt & ECC_SB_ERR_COUNT_MASK);
> +	sb_err_cnt >>= ECC_SB_ERR_COUNT_SHIFT;
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Single-Bit error count: 0x%4x\n",
> +		    sb_err_cnt);
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + TRP_ECC_ERROR_STATUS0,
> +			  &sb_err_ways);
> +	if (ret)
> +		return ret;
> +
> +	sb_err_ways = sb_err_ways & ECC_SB_ERR_WAYS_MASK;
> +
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Single-Bit error ways: 0x%4x\n",
> +		    sb_err_ways);
> +
> +	return ret;
> +}
> +
> +/* Dump syndrome registers for Data Ram Double bit errors */
> +static int dump_drp_db_syn_reg(struct llcc_drv_data *drv, u32 bank)
> +{
> +	int db_err_cnt, db_err_ways, ret, i;
> +	u32 synd_reg, synd_val;
> +
> +	for (i = 0; i < DRP_SYN_REG_CNT; i++) {
> +		synd_reg = DRP_ECC_DB_ERR_SYN0 + (i * 4);
> +		ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg,
> +				  &synd_val);
> +		if (ret)
> +			return ret;
> +		edac_printk(KERN_CRIT, EDAC_LLCC, "DRP_ECC_SYN%d: 0x%8x\n", i,
> +			    synd_val);
> +	}
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + DRP_ECC_ERROR_STATUS1,
> +			  &db_err_cnt);
> +	if (ret)
> +		return ret;
> +	db_err_cnt = (db_err_cnt & ECC_DB_ERR_COUNT_MASK);
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Double-Bit error count: 0x%4x\n",
> +		    db_err_cnt);
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + DRP_ECC_ERROR_STATUS0,
> +			  &db_err_ways);
> +	if (ret)
> +		return ret;
> +	db_err_ways &= ECC_DB_ERR_WAYS_MASK;
> +	db_err_ways >>= ECC_DB_ERR_WAYS_SHIFT;
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Double-Bit error ways: 0x%4x\n",
> +		    db_err_ways);
> +
> +	return ret;
> +}
> +
> +/* Dump Syndrome registers for Data Ram Single bit errors*/
> +static int dump_drp_sb_syn_reg(struct llcc_drv_data *drv, u32 bank)
> +{
> +	int sb_err_cnt, sb_err_ways, ret, i;
> +	u32 synd_reg, synd_val;
> +
> +	for (i = 0; i < DRP_SYN_REG_CNT; i++) {
> +		synd_reg = DRP_ECC_SB_ERR_SYN0 + (i * 4);
> +		ret = regmap_read(drv->regmap, drv->offsets[bank] + synd_reg,
> +				  &synd_val);
> +		if (ret)
> +			return ret;
> +		edac_printk(KERN_CRIT, EDAC_LLCC, "DRP_ECC_SYN%d: 0x%8x\n", i,
> +			    synd_val);
> +	}
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + DRP_ECC_ERROR_STATUS1,
> +			  &sb_err_cnt);
> +	if (ret)
> +		return ret;
> +	sb_err_cnt &= ECC_SB_ERR_COUNT_MASK;
> +	sb_err_cnt >>= ECC_SB_ERR_COUNT_SHIFT;
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Single-Bit error count: 0x%4x\n",
> +		    sb_err_cnt);
> +
> +	ret = regmap_read(drv->regmap,
> +			  drv->offsets[bank] + DRP_ECC_ERROR_STATUS0,
> +			  &sb_err_ways);
> +	if (ret)
> +		return ret;
> +	sb_err_ways = sb_err_ways & ECC_SB_ERR_WAYS_MASK;
> +
> +	edac_printk(KERN_CRIT, EDAC_LLCC, "Single-Bit error ways: 0x%4x\n",
> +		    sb_err_ways);
> +
> +	return ret;
> +}
> +
> +static int dump_syn_reg(struct edac_device_ctl_info *edev_ctl,
> +			 int err_type, u32 bank)
> +{
> +	struct llcc_drv_data *drv = edev_ctl->pvt_info;
> +	int ret = 0;
> +
> +	switch (err_type) {
> +	case LLCC_DRAM_CE:
> +		ret = dump_drp_sb_syn_reg(drv, bank);
> +		break;
> +	case LLCC_DRAM_UE:
> +		ret = dump_drp_db_syn_reg(drv, bank);
> +		break;
> +	case LLCC_TRAM_CE:
> +		ret = dump_trp_sb_syn_reg(drv, bank);
> +		break;
> +	case LLCC_TRAM_UE:
> +		ret = dump_trp_db_syn_reg(drv, bank);
> +		break;
> +	}
> +	if (ret)
> +		return ret;
> +
> +	ret = qcom_llcc_clear_errors(err_type, drv);
> +	if (ret)
> +		return ret;
> +
> +	errors[err_type].func(edev_ctl, 0, bank, errors[err_type].msg);
> +
> +	return ret;
> +}
> +
> +static irqreturn_t
> +llcc_ecc_irq_handler (int irq, void *edev_ctl)
> +{
> +	struct edac_device_ctl_info *edac_dev_ctl;
> +	irqreturn_t irq_rc = IRQ_NONE;
> +	u32 drp_error, trp_error, i;
> +	struct llcc_drv_data *drv;
> +	int ret;
> +
> +	edac_dev_ctl = (struct edac_device_ctl_info *)edev_ctl;
> +	drv = edac_dev_ctl->pvt_info;
> +
> +	for (i = 0; i < drv->num_banks; i++) {
> +		/* Look for Data RAM errors */
> +		ret = regmap_read(drv->regmap,
> +				  drv->offsets[i] + DRP_INTERRUPT_STATUS,
> +				  &drp_error);
> +		if (ret)
> +			return irq_rc;
> +
> +		if (drp_error & SB_ECC_ERROR) {
> +			edac_printk(KERN_CRIT, EDAC_LLCC,
> +				    "Single Bit Error detected in Data Ram\n");
> +			dump_syn_reg(edev_ctl, LLCC_DRAM_CE, i);
> +			irq_rc = IRQ_HANDLED;
> +		} else if (drp_error & DB_ECC_ERROR) {
> +			edac_printk(KERN_CRIT, EDAC_LLCC,
> +				    "Double Bit Error detected in Data Ram\n");
> +			dump_syn_reg(edev_ctl, LLCC_DRAM_UE, i);
> +			irq_rc = IRQ_HANDLED;
> +		}
> +
> +		/* Look for Tag RAM errors */
> +		ret = regmap_read(drv->regmap,
> +				  drv->offsets[i] + TRP_INTERRUPT_0_STATUS,
> +				  &trp_error);
> +		if (ret)
> +			return irq_rc;
> +		if (trp_error & SB_ECC_ERROR) {
> +			edac_printk(KERN_CRIT, EDAC_LLCC,
> +				    "Single Bit Error detected in Tag Ram\n");
> +			dump_syn_reg(edev_ctl, LLCC_TRAM_CE, i);
> +			irq_rc = IRQ_HANDLED;
> +		} else if (trp_error & DB_ECC_ERROR) {
> +			edac_printk(KERN_CRIT, EDAC_LLCC,
> +				    "Double Bit Error detected in Tag Ram\n");
> +			dump_syn_reg(edev_ctl, LLCC_TRAM_UE, i);
> +			irq_rc = IRQ_HANDLED;
> +		}
> +	}
> +
> +	return irq_rc;
> +}
> +
> +static int qcom_llcc_edac_probe(struct platform_device *pdev)
> +{
> +	struct llcc_drv_data *llcc_driv_data = pdev->dev.platform_data;
> +	struct edac_device_ctl_info *edev_ctl;
> +	struct device *dev = &pdev->dev;
> +	u32 ecc_irq;
> +	int rc;
> +
> +	rc = qcom_llcc_core_setup(llcc_driv_data->bcast_regmap);
> +	if (rc)
> +		return rc;
> +
> +	/* Allocate edac control info */
> +	edev_ctl = edac_device_alloc_ctl_info(0, "qcom-llcc", 1, "bank",
> +					      llcc_driv_data->num_banks, 1,
> +					      NULL, 0,
> +					      edac_device_alloc_index());
> +
> +	if (!edev_ctl)
> +		return -ENOMEM;
> +
> +	edev_ctl->dev = dev;
> +	edev_ctl->mod_name = dev_name(dev);
> +	edev_ctl->dev_name = dev_name(dev);
> +	edev_ctl->ctl_name = "llcc";
> +	edev_ctl->panic_on_ue = LLCC_ERP_PANIC_ON_UE;
> +
> +	edev_ctl->pvt_info = (struct llcc_drv_data *) llcc_driv_data;
> +
> +	rc = edac_device_add_device(edev_ctl);
> +	if (rc)
> +		goto out_mem;
> +
> +	platform_set_drvdata(pdev, edev_ctl);
> +
> +	/* Request for ecc irq */
> +	ecc_irq = llcc_driv_data->ecc_irq;
> +	if (!ecc_irq) {
> +		rc = -ENODEV;
> +		goto out_dev;
> +	}
> +	rc = devm_request_irq(dev, ecc_irq, llcc_ecc_irq_handler,
> +			      IRQF_TRIGGER_HIGH, "llcc_ecc", edev_ctl);
> +	if (rc)
> +		goto out_dev;
> +
> +	return rc;
> +
> +out_dev:
> +	edac_device_del_device(edev_ctl->dev);
> +out_mem:
> +	edac_device_free_ctl_info(edev_ctl);
> +
> +	return rc;
> +}
> +
> +static int qcom_llcc_edac_remove(struct platform_device *pdev)
> +{
> +	struct edac_device_ctl_info *edev_ctl = dev_get_drvdata(&pdev->dev);
> +
> +	edac_device_del_device(edev_ctl->dev);
> +	edac_device_free_ctl_info(edev_ctl);
> +	platform_set_drvdata(pdev, NULL);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id qcom_llcc_edac_match_table[] = {
> +#ifdef EDAC_QCOM_LLCC
> +	{ .compatible = "qcom,llcc-edac" },
> +#endif
> +	{ },
> +};
> +
> +static struct platform_driver qcom_llcc_edac_driver = {
> +	.probe = qcom_llcc_edac_probe,
> +	.remove = qcom_llcc_edac_remove,
> +	.driver = {
> +		.name = "qcom_llcc_edac",
> +		.of_match_table = qcom_llcc_edac_match_table,
> +	},
> +};
> +module_platform_driver(qcom_llcc_edac_driver);
> +
> +MODULE_DESCRIPTION("QCOM EDAC driver");
> +MODULE_LICENSE("GPL v2");

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