From: Shivasharan S Date: Tue, 7 May 2019 17:05:49 +0000 (-0700) Subject: scsi: megaraid_sas: Export RAID map through debugfs X-Git-Tag: v5.4-rc1~491^2~155 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ba53572bf02da1836e5780e8c283c8e0cea714e2;p=platform%2Fkernel%2Flinux-rpi.git scsi: megaraid_sas: Export RAID map through debugfs Create a debugfs interface for megaraid_sas driver. Provide interface to dump driver RAID map in debugfs. Signed-off-by: Sumit Saxena Signed-off-by: Shivasharan S Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/megaraid/Makefile b/drivers/scsi/megaraid/Makefile index 6e74d21..12177e4 100644 --- a/drivers/scsi/megaraid/Makefile +++ b/drivers/scsi/megaraid/Makefile @@ -3,4 +3,4 @@ obj-$(CONFIG_MEGARAID_MM) += megaraid_mm.o obj-$(CONFIG_MEGARAID_MAILBOX) += megaraid_mbox.o obj-$(CONFIG_MEGARAID_SAS) += megaraid_sas.o megaraid_sas-objs := megaraid_sas_base.o megaraid_sas_fusion.o \ - megaraid_sas_fp.o + megaraid_sas_fp.o megaraid_sas_debugfs.o diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 840506f..56b3204 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -2390,6 +2390,10 @@ struct megasas_instance { u8 task_abort_tmo; u8 max_reset_tmo; u8 snapdump_wait_time; +#ifdef CONFIG_DEBUG_FS + struct dentry *debugfs_root; + struct dentry *raidmap_dump; +#endif u8 enable_fw_dev_list; }; struct MR_LD_VF_MAP { diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 555292e..3a9128e 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -188,6 +188,12 @@ static bool support_nvme_encapsulation; /* define lock for aen poll */ spinlock_t poll_aen_lock; +extern struct dentry *megasas_debugfs_root; +extern void megasas_init_debugfs(void); +extern void megasas_exit_debugfs(void); +extern void megasas_setup_debugfs(struct megasas_instance *instance); +extern void megasas_destroy_debugfs(struct megasas_instance *instance); + void megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, u8 alt_status); @@ -7139,6 +7145,8 @@ static int megasas_probe_one(struct pci_dev *pdev, goto fail_start_aen; } + megasas_setup_debugfs(instance); + /* Get current SR-IOV LD/VF affiliation */ if (instance->requestorId) megasas_get_ld_vf_affiliation(instance, 1); @@ -7609,6 +7617,8 @@ skip_firing_dcmds: megasas_free_ctrl_mem(instance); + megasas_destroy_debugfs(instance); + scsi_host_put(host); pci_disable_device(pdev); @@ -8536,6 +8546,8 @@ static int __init megasas_init(void) megasas_mgmt_majorno = rval; + megasas_init_debugfs(); + /* * Register ourselves as PCI hotplug module */ @@ -8595,6 +8607,7 @@ err_dcf_rel_date: err_dcf_attr_ver: pci_unregister_driver(&megasas_pci_driver); err_pcidrv: + megasas_exit_debugfs(); unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); return rval; } @@ -8617,6 +8630,7 @@ static void __exit megasas_exit(void) &driver_attr_support_nvme_encapsulation); pci_unregister_driver(&megasas_pci_driver); + megasas_exit_debugfs(); unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); } diff --git a/drivers/scsi/megaraid/megaraid_sas_debugfs.c b/drivers/scsi/megaraid/megaraid_sas_debugfs.c new file mode 100644 index 0000000..e52837b --- /dev/null +++ b/drivers/scsi/megaraid/megaraid_sas_debugfs.c @@ -0,0 +1,180 @@ +/* + * Linux MegaRAID driver for SAS based RAID controllers + * + * Copyright (c) 2003-2018 LSI Corporation. + * Copyright (c) 2003-2018 Avago Technologies. + * Copyright (c) 2003-2018 Broadcom Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + * Authors: Broadcom Inc. + * Kashyap Desai + * Sumit Saxena + * Shivasharan S + * + * Send feedback to: megaraidlinux.pdl@broadcom.com + */ +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "megaraid_sas_fusion.h" +#include "megaraid_sas.h" + +#ifdef CONFIG_DEBUG_FS +#include + +struct dentry *megasas_debugfs_root; + +static ssize_t +megasas_debugfs_read(struct file *filp, char __user *ubuf, size_t cnt, + loff_t *ppos) +{ + struct megasas_debugfs_buffer *debug = filp->private_data; + + if (!debug || !debug->buf) + return 0; + + return simple_read_from_buffer(ubuf, cnt, ppos, debug->buf, debug->len); +} + +static int +megasas_debugfs_raidmap_open(struct inode *inode, struct file *file) +{ + struct megasas_instance *instance = inode->i_private; + struct megasas_debugfs_buffer *debug; + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + debug = kzalloc(sizeof(struct megasas_debugfs_buffer), GFP_KERNEL); + if (!debug) + return -ENOMEM; + + debug->buf = (void *)fusion->ld_drv_map[(instance->map_id & 1)]; + debug->len = fusion->drv_map_sz; + file->private_data = debug; + + return 0; +} + +static int +megasas_debugfs_release(struct inode *inode, struct file *file) +{ + struct megasas_debug_buffer *debug = file->private_data; + + if (!debug) + return 0; + + file->private_data = NULL; + kfree(debug); + return 0; +} + +static const struct file_operations megasas_debugfs_raidmap_fops = { + .owner = THIS_MODULE, + .open = megasas_debugfs_raidmap_open, + .read = megasas_debugfs_read, + .release = megasas_debugfs_release, +}; + +/* + * megasas_init_debugfs : Create debugfs root for megaraid_sas driver + */ +void megasas_init_debugfs(void) +{ + megasas_debugfs_root = debugfs_create_dir("megaraid_sas", NULL); + if (!megasas_debugfs_root) + pr_info("Cannot create debugfs root\n"); +} + +/* + * megasas_exit_debugfs : Remove debugfs root for megaraid_sas driver + */ +void megasas_exit_debugfs(void) +{ + debugfs_remove_recursive(megasas_debugfs_root); +} + +/* + * megasas_setup_debugfs : Setup debugfs per Fusion adapter + * instance: Soft instance of adapter + */ +void +megasas_setup_debugfs(struct megasas_instance *instance) +{ + char name[64]; + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (fusion) { + snprintf(name, sizeof(name), + "scsi_host%d", instance->host->host_no); + if (!instance->debugfs_root) { + instance->debugfs_root = + debugfs_create_dir(name, megasas_debugfs_root); + if (!instance->debugfs_root) { + dev_err(&instance->pdev->dev, + "Cannot create per adapter debugfs directory\n"); + return; + } + } + + snprintf(name, sizeof(name), "raidmap_dump"); + instance->raidmap_dump = + debugfs_create_file(name, S_IRUGO, + instance->debugfs_root, instance, + &megasas_debugfs_raidmap_fops); + if (!instance->raidmap_dump) { + dev_err(&instance->pdev->dev, + "Cannot create raidmap debugfs file\n"); + debugfs_remove(instance->debugfs_root); + return; + } + } + +} + +/* + * megasas_destroy_debugfs : Destroy debugfs per Fusion adapter + * instance: Soft instance of adapter + */ +void megasas_destroy_debugfs(struct megasas_instance *instance) +{ + debugfs_remove_recursive(instance->debugfs_root); +} + +#else +void megasas_init_debugfs(void) +{ +} +void megasas_exit_debugfs(void) +{ +} +void megasas_setup_debugfs(struct megasas_instance *instance) +{ +} +void megasas_destroy_debugfs(struct megasas_instance *instance) +{ +} +#endif /*CONFIG_DEBUG_FS*/ diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 160ac16..9873829 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -1360,6 +1360,11 @@ struct MR_SNAPDUMP_PROPERTIES { u8 reserved[12]; }; +struct megasas_debugfs_buffer { + void *buf; + u32 len; +}; + void megasas_free_cmds_fusion(struct megasas_instance *instance); int megasas_ioc_init_fusion(struct megasas_instance *instance); u8 megasas_get_map_info(struct megasas_instance *instance);