From: Adrian Hunter Date: Thu, 7 Jan 2021 07:25:38 +0000 (+0200) Subject: scsi: ufs: ufs-debugfs: Add error counters X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=b6cacaf2044fd9b82e5ceac88d8d17e04a01982f;p=uclinux-h8%2Flinux.git scsi: ufs: ufs-debugfs: Add error counters People testing have a need to know how many errors might be occurring over time. Add error counters and expose them via debugfs. A module initcall is used to create a debugfs root directory for ufshcd-related items. In the case that modules are built-in, then initialization is done in link order, so move ufshcd-core to the top of the Makefile. Link: https://lore.kernel.org/r/20210107072538.21782-1-adrian.hunter@intel.com Reviewed-by: Avri Altman Reviewed-by: Bean Huo Reviewed-by: Can Guo Signed-off-by: Adrian Hunter Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile index 4679af1b564e..06f3a3fe4a44 100644 --- a/drivers/scsi/ufs/Makefile +++ b/drivers/scsi/ufs/Makefile @@ -1,5 +1,14 @@ # SPDX-License-Identifier: GPL-2.0 # UFSHCD makefile + +# The link order is important here. ufshcd-core must initialize +# before vendor drivers. +obj-$(CONFIG_SCSI_UFSHCD) += ufshcd-core.o +ufshcd-core-y += ufshcd.o ufs-sysfs.o +ufshcd-core-$(CONFIG_DEBUG_FS) += ufs-debugfs.o +ufshcd-core-$(CONFIG_SCSI_UFS_BSG) += ufs_bsg.o +ufshcd-core-$(CONFIG_SCSI_UFS_CRYPTO) += ufshcd-crypto.o + obj-$(CONFIG_SCSI_UFS_DWC_TC_PCI) += tc-dwc-g210-pci.o ufshcd-dwc.o tc-dwc-g210.o obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-dwc-g210.o obj-$(CONFIG_SCSI_UFS_CDNS_PLATFORM) += cdns-pltfrm.o @@ -7,10 +16,6 @@ obj-$(CONFIG_SCSI_UFS_QCOM) += ufs_qcom.o ufs_qcom-y += ufs-qcom.o ufs_qcom-$(CONFIG_SCSI_UFS_CRYPTO) += ufs-qcom-ice.o obj-$(CONFIG_SCSI_UFS_EXYNOS) += ufs-exynos.o -obj-$(CONFIG_SCSI_UFSHCD) += ufshcd-core.o -ufshcd-core-y += ufshcd.o ufs-sysfs.o -ufshcd-core-$(CONFIG_SCSI_UFS_BSG) += ufs_bsg.o -ufshcd-core-$(CONFIG_SCSI_UFS_CRYPTO) += ufshcd-crypto.o obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o obj-$(CONFIG_SCSI_UFS_HISI) += ufs-hisi.o diff --git a/drivers/scsi/ufs/ufs-debugfs.c b/drivers/scsi/ufs/ufs-debugfs.c new file mode 100644 index 000000000000..dee98dc72d29 --- /dev/null +++ b/drivers/scsi/ufs/ufs-debugfs.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2020 Intel Corporation + +#include + +#include "ufs-debugfs.h" +#include "ufshcd.h" + +static struct dentry *ufs_debugfs_root; + +void __init ufs_debugfs_init(void) +{ + ufs_debugfs_root = debugfs_create_dir("ufshcd", NULL); +} + +void __exit ufs_debugfs_exit(void) +{ + debugfs_remove_recursive(ufs_debugfs_root); +} + +static int ufs_debugfs_stats_show(struct seq_file *s, void *data) +{ + struct ufs_hba *hba = s->private; + struct ufs_event_hist *e = hba->ufs_stats.event; + +#define PRT(fmt, typ) \ + seq_printf(s, fmt, e[UFS_EVT_ ## typ].cnt) + + PRT("PHY Adapter Layer errors (except LINERESET): %llu\n", PA_ERR); + PRT("Data Link Layer errors: %llu\n", DL_ERR); + PRT("Network Layer errors: %llu\n", NL_ERR); + PRT("Transport Layer errors: %llu\n", TL_ERR); + PRT("Generic DME errors: %llu\n", DME_ERR); + PRT("Auto-hibernate errors: %llu\n", AUTO_HIBERN8_ERR); + PRT("IS Fatal errors (CEFES, SBFES, HCFES, DFES): %llu\n", FATAL_ERR); + PRT("DME Link Startup errors: %llu\n", LINK_STARTUP_FAIL); + PRT("PM Resume errors: %llu\n", RESUME_ERR); + PRT("PM Suspend errors : %llu\n", SUSPEND_ERR); + PRT("Logical Unit Resets: %llu\n", DEV_RESET); + PRT("Host Resets: %llu\n", HOST_RESET); + PRT("SCSI command aborts: %llu\n", ABORT); +#undef PRT + return 0; +} +DEFINE_SHOW_ATTRIBUTE(ufs_debugfs_stats); + +void ufs_debugfs_hba_init(struct ufs_hba *hba) +{ + hba->debugfs_root = debugfs_create_dir(dev_name(hba->dev), ufs_debugfs_root); + debugfs_create_file("stats", 0400, hba->debugfs_root, hba, &ufs_debugfs_stats_fops); +} + +void ufs_debugfs_hba_exit(struct ufs_hba *hba) +{ + debugfs_remove_recursive(hba->debugfs_root); +} diff --git a/drivers/scsi/ufs/ufs-debugfs.h b/drivers/scsi/ufs/ufs-debugfs.h new file mode 100644 index 000000000000..f35b39c4b4f5 --- /dev/null +++ b/drivers/scsi/ufs/ufs-debugfs.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2020 Intel Corporation + */ + +#ifndef __UFS_DEBUGFS_H__ +#define __UFS_DEBUGFS_H__ + +struct ufs_hba; + +#ifdef CONFIG_DEBUG_FS +void __init ufs_debugfs_init(void); +void __exit ufs_debugfs_exit(void); +void ufs_debugfs_hba_init(struct ufs_hba *hba); +void ufs_debugfs_hba_exit(struct ufs_hba *hba); +#else +static inline void ufs_debugfs_init(void) {} +static inline void ufs_debugfs_exit(void) {} +static inline void ufs_debugfs_hba_init(struct ufs_hba *hba) {} +static inline void ufs_debugfs_hba_exit(struct ufs_hba *hba) {} +#endif + +#endif diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 53fd59ce50b2..c6559e94f209 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -20,6 +20,7 @@ #include "ufs_quirks.h" #include "unipro.h" #include "ufs-sysfs.h" +#include "ufs-debugfs.h" #include "ufs_bsg.h" #include "ufshcd-crypto.h" #include @@ -4562,6 +4563,7 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val) e = &hba->ufs_stats.event[id]; e->val[e->pos] = val; e->tstamp[e->pos] = ktime_get(); + e->cnt += 1; e->pos = (e->pos + 1) % UFS_EVENT_HIST_LENGTH; ufshcd_vops_event_notify(hba, id, &val); @@ -8356,6 +8358,8 @@ static int ufshcd_hba_init(struct ufs_hba *hba) if (err) goto out_disable_vreg; + ufs_debugfs_hba_init(hba); + hba->is_powered = true; goto out; @@ -8372,6 +8376,7 @@ out: static void ufshcd_hba_exit(struct ufs_hba *hba) { if (hba->is_powered) { + ufs_debugfs_hba_exit(hba); ufshcd_variant_hba_exit(hba); ufshcd_setup_vreg(hba, false); ufshcd_suspend_clkscaling(hba); @@ -9458,6 +9463,20 @@ out_error: } EXPORT_SYMBOL_GPL(ufshcd_init); +static int __init ufshcd_core_init(void) +{ + ufs_debugfs_init(); + return 0; +} + +static void __exit ufshcd_core_exit(void) +{ + ufs_debugfs_exit(); +} + +module_init(ufshcd_core_init); +module_exit(ufshcd_core_exit); + MODULE_AUTHOR("Santosh Yaragnavi "); MODULE_AUTHOR("Vinayak Holikatti "); MODULE_DESCRIPTION("Generic UFS host controller driver Core"); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 85f9d0fbfbd9..3f7db69ebc82 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -445,11 +445,13 @@ struct ufs_clk_scaling { * @pos: index to indicate cyclic buffer position * @reg: cyclic buffer for registers value * @tstamp: cyclic buffer for time stamp + * @cnt: error counter */ struct ufs_event_hist { int pos; u32 val[UFS_EVENT_HIST_LENGTH]; ktime_t tstamp[UFS_EVENT_HIST_LENGTH]; + unsigned long long cnt; }; /** @@ -823,6 +825,9 @@ struct ufs_hba { u32 crypto_cfg_register; struct blk_keyslot_manager ksm; #endif +#ifdef CONFIG_DEBUG_FS + struct dentry *debugfs_root; +#endif }; /* Returns true if clocks can be gated. Otherwise false */