[SCSI] bfa: add debugfs support
- Add debugfs support to obtain firmware trace, driver trace and read/write to registers. - debugfs hierarchy: /sys/kernel/debug/bfa/host# where the host number corresponds to the one under /sys/class/scsi_host/host# - Following are the new debugfs entries added: drvtrc: collect current driver trace fwtrc: collect current firmware trace. fwsave: collect last saved fw trace as a result of firmware crash. regwr: write one word to chip register regrd: read one or more words from chip register. Signed-off-by: Jing Huang <huangj@brocade.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>hifive-unleashed-5.1
Jing Huang
James Bottomley
parent
08a17ced7a
commit
ab2a9ba189
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@ -1,7 +1,7 @@
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obj-$(CONFIG_SCSI_BFA_FC) := bfa.o
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bfa-y := bfad.o bfad_intr.o bfad_os.o bfad_im.o bfad_attr.o bfad_fwimg.o
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bfa-y += bfad_debugfs.o
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bfa-y += bfa_core.o bfa_ioc.o bfa_ioc_ct.o bfa_ioc_cb.o bfa_iocfc.o bfa_fcxp.o
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bfa-y += bfa_lps.o bfa_hw_cb.o bfa_hw_ct.o bfa_intr.o bfa_timer.o bfa_rport.o
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bfa-y += bfa_fcport.o bfa_port.o bfa_uf.o bfa_sgpg.o bfa_module.o bfa_ioim.o
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@ -57,6 +57,7 @@ static int ipfc_enable = BFA_FALSE;
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static int fdmi_enable = BFA_TRUE;
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int bfa_lun_queue_depth = BFAD_LUN_QUEUE_DEPTH;
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int bfa_linkup_delay = -1;
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int bfa_debugfs_enable = 1;
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module_param(os_name, charp, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(os_name, "OS name of the hba host machine");
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@ -106,6 +107,9 @@ MODULE_PARM_DESC(bfa_linkup_delay, "Link up delay, default=30 secs for boot"
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module_param(fdmi_enable, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(fdmi_enable, "Enables fdmi registration, default=1,"
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" Range[false:0|true:1]");
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module_param(bfa_debugfs_enable, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(bfa_debugfs_enable, "Enables debugfs feature, default=1,"
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" Range[false:0|true:1]");
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/*
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* Stores the module parm num_sgpgs value;
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@ -903,6 +907,10 @@ bfad_cfg_pport(struct bfad_s *bfad, enum bfa_port_role role)
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bfad->pport.roles |= BFA_PORT_ROLE_FCP_IM;
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}
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/* Setup the debugfs node for this scsi_host */
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if (bfa_debugfs_enable)
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bfad_debugfs_init(&bfad->pport);
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bfad->bfad_flags |= BFAD_CFG_PPORT_DONE;
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out:
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@ -912,6 +920,10 @@ out:
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void
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bfad_uncfg_pport(struct bfad_s *bfad)
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{
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/* Remove the debugfs node for this scsi_host */
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kfree(bfad->regdata);
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bfad_debugfs_exit(&bfad->pport);
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if ((bfad->pport.roles & BFA_PORT_ROLE_FCP_IPFC) && ipfc_enable) {
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bfad_ipfc_port_delete(bfad, &bfad->pport);
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bfad->pport.roles &= ~BFA_PORT_ROLE_FCP_IPFC;
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@ -0,0 +1,547 @@
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/*
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* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/debugfs.h>
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#include <bfad_drv.h>
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#include <bfad_im.h>
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/*
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* BFA debufs interface
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*
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* To access the interface, debugfs file system should be mounted
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* if not already mounted using:
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* mount -t debugfs none /sys/kernel/debug
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*
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* BFA Hierarchy:
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* - bfa/host#
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* where the host number corresponds to the one under /sys/class/scsi_host/host#
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*
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* Debugging service available per host:
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* fwtrc: To collect current firmware trace.
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* drvtrc: To collect current driver trace
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* fwsave: To collect last saved fw trace as a result of firmware crash.
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* regwr: To write one word to chip register
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* regrd: To read one or more words from chip register.
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*/
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struct bfad_debug_info {
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char *debug_buffer;
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void *i_private;
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int buffer_len;
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};
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static int
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bfad_debugfs_open_drvtrc(struct inode *inode, struct file *file)
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{
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struct bfad_port_s *port = inode->i_private;
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struct bfad_s *bfad = port->bfad;
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struct bfad_debug_info *debug;
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debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL);
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if (!debug)
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return -ENOMEM;
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debug->debug_buffer = (void *) bfad->trcmod;
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debug->buffer_len = sizeof(struct bfa_trc_mod_s);
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file->private_data = debug;
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return 0;
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}
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static int
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bfad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
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{
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struct bfad_port_s *port = inode->i_private;
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struct bfad_s *bfad = port->bfad;
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struct bfad_debug_info *fw_debug;
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unsigned long flags;
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int rc;
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fw_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL);
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if (!fw_debug)
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return -ENOMEM;
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fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s);
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fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len);
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if (!fw_debug->debug_buffer) {
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kfree(fw_debug);
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printk(KERN_INFO "bfad[%d]: Failed to allocate fwtrc buffer\n",
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bfad->inst_no);
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return -ENOMEM;
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}
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memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len);
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spin_lock_irqsave(&bfad->bfad_lock, flags);
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rc = bfa_debug_fwtrc(&bfad->bfa,
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fw_debug->debug_buffer,
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&fw_debug->buffer_len);
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spin_unlock_irqrestore(&bfad->bfad_lock, flags);
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if (rc != BFA_STATUS_OK) {
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vfree(fw_debug->debug_buffer);
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fw_debug->debug_buffer = NULL;
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kfree(fw_debug);
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printk(KERN_INFO "bfad[%d]: Failed to collect fwtrc\n",
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bfad->inst_no);
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return -ENOMEM;
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}
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file->private_data = fw_debug;
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return 0;
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}
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static int
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bfad_debugfs_open_fwsave(struct inode *inode, struct file *file)
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{
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struct bfad_port_s *port = inode->i_private;
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struct bfad_s *bfad = port->bfad;
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struct bfad_debug_info *fw_debug;
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unsigned long flags;
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int rc;
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fw_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL);
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if (!fw_debug)
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return -ENOMEM;
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fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s);
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fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len);
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if (!fw_debug->debug_buffer) {
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kfree(fw_debug);
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printk(KERN_INFO "bfad[%d]: Failed to allocate fwsave buffer\n",
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bfad->inst_no);
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return -ENOMEM;
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}
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memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len);
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spin_lock_irqsave(&bfad->bfad_lock, flags);
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rc = bfa_debug_fwsave(&bfad->bfa,
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fw_debug->debug_buffer,
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&fw_debug->buffer_len);
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spin_unlock_irqrestore(&bfad->bfad_lock, flags);
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if (rc != BFA_STATUS_OK) {
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vfree(fw_debug->debug_buffer);
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fw_debug->debug_buffer = NULL;
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kfree(fw_debug);
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printk(KERN_INFO "bfad[%d]: Failed to collect fwsave\n",
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bfad->inst_no);
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return -ENOMEM;
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}
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file->private_data = fw_debug;
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return 0;
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}
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static int
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bfad_debugfs_open_reg(struct inode *inode, struct file *file)
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{
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struct bfad_debug_info *reg_debug;
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reg_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL);
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if (!reg_debug)
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return -ENOMEM;
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reg_debug->i_private = inode->i_private;
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file->private_data = reg_debug;
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return 0;
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}
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/* Changes the current file position */
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static loff_t
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bfad_debugfs_lseek(struct file *file, loff_t offset, int orig)
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{
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struct bfad_debug_info *debug;
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loff_t pos = file->f_pos;
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debug = file->private_data;
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switch (orig) {
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case 0:
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file->f_pos = offset;
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break;
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case 1:
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file->f_pos += offset;
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break;
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case 2:
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file->f_pos = debug->buffer_len - offset;
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break;
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default:
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return -EINVAL;
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}
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if (file->f_pos < 0 || file->f_pos > debug->buffer_len) {
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file->f_pos = pos;
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return -EINVAL;
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}
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return file->f_pos;
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}
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static ssize_t
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bfad_debugfs_read(struct file *file, char __user *buf,
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size_t nbytes, loff_t *pos)
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{
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struct bfad_debug_info *debug = file->private_data;
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if (!debug || !debug->debug_buffer)
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return 0;
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return memory_read_from_buffer(buf, nbytes, pos,
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debug->debug_buffer, debug->buffer_len);
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}
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#define BFA_REG_CT_ADDRSZ (0x40000)
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#define BFA_REG_CB_ADDRSZ (0x20000)
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#define BFA_REG_ADDRSZ(__bfa) \
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((bfa_ioc_devid(&(__bfa)->ioc) == BFA_PCI_DEVICE_ID_CT) ? \
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BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ)
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#define BFA_REG_ADDRMSK(__bfa) ((uint32_t)(BFA_REG_ADDRSZ(__bfa) - 1))
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static bfa_status_t
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bfad_reg_offset_check(struct bfa_s *bfa, u32 offset, u32 len)
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{
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u8 area;
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/* check [16:15] */
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area = (offset >> 15) & 0x7;
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if (area == 0) {
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/* PCIe core register */
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if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */
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return BFA_STATUS_EINVAL;
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} else if (area == 0x1) {
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/* CB 32 KB memory page */
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if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */
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return BFA_STATUS_EINVAL;
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} else {
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/* CB register space 64KB */
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if ((offset + (len<<2)) > BFA_REG_ADDRMSK(bfa))
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return BFA_STATUS_EINVAL;
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}
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return BFA_STATUS_OK;
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}
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static ssize_t
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bfad_debugfs_read_regrd(struct file *file, char __user *buf,
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size_t nbytes, loff_t *pos)
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{
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struct bfad_debug_info *regrd_debug = file->private_data;
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struct bfad_port_s *port = (struct bfad_port_s *)regrd_debug->i_private;
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struct bfad_s *bfad = port->bfad;
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ssize_t rc;
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if (!bfad->regdata)
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return 0;
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rc = memory_read_from_buffer(buf, nbytes, pos,
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bfad->regdata, bfad->reglen);
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if ((*pos + nbytes) >= bfad->reglen) {
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kfree(bfad->regdata);
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bfad->regdata = NULL;
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bfad->reglen = 0;
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}
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return rc;
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}
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static ssize_t
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bfad_debugfs_write_regrd(struct file *file, const char __user *buf,
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size_t nbytes, loff_t *ppos)
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{
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struct bfad_debug_info *regrd_debug = file->private_data;
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struct bfad_port_s *port = (struct bfad_port_s *)regrd_debug->i_private;
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struct bfad_s *bfad = port->bfad;
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struct bfa_s *bfa = &bfad->bfa;
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struct bfa_ioc_s *ioc = &bfa->ioc;
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int addr, len, rc, i;
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u32 *regbuf;
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void __iomem *rb, *reg_addr;
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unsigned long flags;
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rc = sscanf(buf, "%x:%x", &addr, &len);
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if (rc < 2) {
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printk(KERN_INFO
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"bfad[%d]: %s failed to read user buf\n",
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bfad->inst_no, __func__);
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return -EINVAL;
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}
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kfree(bfad->regdata);
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bfad->regdata = NULL;
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bfad->reglen = 0;
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bfad->regdata = kzalloc(len << 2, GFP_KERNEL);
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if (!bfad->regdata) {
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printk(KERN_INFO "bfad[%d]: Failed to allocate regrd buffer\n",
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bfad->inst_no);
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return -ENOMEM;
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}
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bfad->reglen = len << 2;
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rb = bfa_ioc_bar0(ioc);
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addr &= BFA_REG_ADDRMSK(bfa);
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/* offset and len sanity check */
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rc = bfad_reg_offset_check(bfa, addr, len);
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if (rc) {
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printk(KERN_INFO "bfad[%d]: Failed reg offset check\n",
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bfad->inst_no);
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kfree(bfad->regdata);
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bfad->regdata = NULL;
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bfad->reglen = 0;
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return -EINVAL;
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}
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reg_addr = rb + addr;
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regbuf = (u32 *)bfad->regdata;
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spin_lock_irqsave(&bfad->bfad_lock, flags);
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for (i = 0; i < len; i++) {
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*regbuf = bfa_reg_read(reg_addr);
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regbuf++;
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reg_addr += sizeof(u32);
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}
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spin_unlock_irqrestore(&bfad->bfad_lock, flags);
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return nbytes;
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}
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static ssize_t
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bfad_debugfs_write_regwr(struct file *file, const char __user *buf,
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size_t nbytes, loff_t *ppos)
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{
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struct bfad_debug_info *debug = file->private_data;
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struct bfad_port_s *port = (struct bfad_port_s *)debug->i_private;
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struct bfad_s *bfad = port->bfad;
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struct bfa_s *bfa = &bfad->bfa;
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struct bfa_ioc_s *ioc = &bfa->ioc;
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int addr, val, rc;
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void __iomem *reg_addr;
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unsigned long flags;
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rc = sscanf(buf, "%x:%x", &addr, &val);
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if (rc < 2) {
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printk(KERN_INFO
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"bfad[%d]: %s failed to read user buf\n",
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bfad->inst_no, __func__);
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return -EINVAL;
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}
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addr &= BFA_REG_ADDRMSK(bfa); /* offset only 17 bit and word align */
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/* offset and len sanity check */
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rc = bfad_reg_offset_check(bfa, addr, 1);
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if (rc) {
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printk(KERN_INFO
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"bfad[%d]: Failed reg offset check\n",
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bfad->inst_no);
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return -EINVAL;
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}
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reg_addr = (uint32_t *) ((uint8_t *) bfa_ioc_bar0(ioc) + addr);
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spin_lock_irqsave(&bfad->bfad_lock, flags);
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bfa_reg_write(reg_addr, val);
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spin_unlock_irqrestore(&bfad->bfad_lock, flags);
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return nbytes;
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}
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static int
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bfad_debugfs_release(struct inode *inode, struct file *file)
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{
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struct bfad_debug_info *debug = file->private_data;
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if (!debug)
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return 0;
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file->private_data = NULL;
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kfree(debug);
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return 0;
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}
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static int
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bfad_debugfs_release_fwtrc(struct inode *inode, struct file *file)
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{
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struct bfad_debug_info *fw_debug = file->private_data;
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if (!fw_debug)
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return 0;
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if (fw_debug->debug_buffer)
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vfree(fw_debug->debug_buffer);
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file->private_data = NULL;
|
||||
kfree(fw_debug);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct file_operations bfad_debugfs_op_drvtrc = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = bfad_debugfs_open_drvtrc,
|
||||
.llseek = bfad_debugfs_lseek,
|
||||
.read = bfad_debugfs_read,
|
||||
.release = bfad_debugfs_release,
|
||||
};
|
||||
|
||||
static const struct file_operations bfad_debugfs_op_fwtrc = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = bfad_debugfs_open_fwtrc,
|
||||
.llseek = bfad_debugfs_lseek,
|
||||
.read = bfad_debugfs_read,
|
||||
.release = bfad_debugfs_release_fwtrc,
|
||||
};
|
||||
|
||||
static const struct file_operations bfad_debugfs_op_fwsave = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = bfad_debugfs_open_fwsave,
|
||||
.llseek = bfad_debugfs_lseek,
|
||||
.read = bfad_debugfs_read,
|
||||
.release = bfad_debugfs_release_fwtrc,
|
||||
};
|
||||
|
||||
static const struct file_operations bfad_debugfs_op_regrd = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = bfad_debugfs_open_reg,
|
||||
.llseek = bfad_debugfs_lseek,
|
||||
.read = bfad_debugfs_read_regrd,
|
||||
.write = bfad_debugfs_write_regrd,
|
||||
.release = bfad_debugfs_release,
|
||||
};
|
||||
|
||||
static const struct file_operations bfad_debugfs_op_regwr = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = bfad_debugfs_open_reg,
|
||||
.llseek = bfad_debugfs_lseek,
|
||||
.write = bfad_debugfs_write_regwr,
|
||||
.release = bfad_debugfs_release,
|
||||
};
|
||||
|
||||
struct bfad_debugfs_entry {
|
||||
const char *name;
|
||||
mode_t mode;
|
||||
const struct file_operations *fops;
|
||||
};
|
||||
|
||||
static const struct bfad_debugfs_entry bfad_debugfs_files[] = {
|
||||
{ "drvtrc", S_IFREG|S_IRUGO, &bfad_debugfs_op_drvtrc, },
|
||||
{ "fwtrc", S_IFREG|S_IRUGO, &bfad_debugfs_op_fwtrc, },
|
||||
{ "fwsave", S_IFREG|S_IRUGO, &bfad_debugfs_op_fwsave, },
|
||||
{ "regrd", S_IFREG|S_IRUGO|S_IWUSR, &bfad_debugfs_op_regrd, },
|
||||
{ "regwr", S_IFREG|S_IWUSR, &bfad_debugfs_op_regwr, },
|
||||
};
|
||||
|
||||
static struct dentry *bfa_debugfs_root;
|
||||
static atomic_t bfa_debugfs_port_count;
|
||||
|
||||
inline void
|
||||
bfad_debugfs_init(struct bfad_port_s *port)
|
||||
{
|
||||
struct bfad_im_port_s *im_port = port->im_port;
|
||||
struct bfad_s *bfad = im_port->bfad;
|
||||
struct Scsi_Host *shost = im_port->shost;
|
||||
const struct bfad_debugfs_entry *file;
|
||||
char name[16];
|
||||
int i;
|
||||
|
||||
if (!bfa_debugfs_enable)
|
||||
return;
|
||||
|
||||
/* Setup the BFA debugfs root directory*/
|
||||
if (!bfa_debugfs_root) {
|
||||
bfa_debugfs_root = debugfs_create_dir("bfa", NULL);
|
||||
atomic_set(&bfa_debugfs_port_count, 0);
|
||||
if (!bfa_debugfs_root) {
|
||||
printk(KERN_WARNING
|
||||
"BFA debugfs root dir creation failed\n");
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Setup the host# directory for the port,
|
||||
* corresponds to the scsi_host num of this port.
|
||||
*/
|
||||
snprintf(name, sizeof(name), "host%d", shost->host_no);
|
||||
if (!port->port_debugfs_root) {
|
||||
port->port_debugfs_root =
|
||||
debugfs_create_dir(name, bfa_debugfs_root);
|
||||
if (!port->port_debugfs_root) {
|
||||
printk(KERN_WARNING
|
||||
"BFA host root dir creation failed\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
atomic_inc(&bfa_debugfs_port_count);
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(bfad_debugfs_files); i++) {
|
||||
file = &bfad_debugfs_files[i];
|
||||
bfad->bfad_dentry_files[i] =
|
||||
debugfs_create_file(file->name,
|
||||
file->mode,
|
||||
port->port_debugfs_root,
|
||||
port,
|
||||
file->fops);
|
||||
if (!bfad->bfad_dentry_files[i]) {
|
||||
printk(KERN_WARNING
|
||||
"BFA host%d: create %s entry failed\n",
|
||||
shost->host_no, file->name);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
return;
|
||||
}
|
||||
|
||||
inline void
|
||||
bfad_debugfs_exit(struct bfad_port_s *port)
|
||||
{
|
||||
struct bfad_im_port_s *im_port = port->im_port;
|
||||
struct bfad_s *bfad = im_port->bfad;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(bfad_debugfs_files); i++) {
|
||||
if (bfad->bfad_dentry_files[i]) {
|
||||
debugfs_remove(bfad->bfad_dentry_files[i]);
|
||||
bfad->bfad_dentry_files[i] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Remove the host# directory for the port,
|
||||
* corresponds to the scsi_host num of this port.
|
||||
*/
|
||||
if (port->port_debugfs_root) {
|
||||
debugfs_remove(port->port_debugfs_root);
|
||||
port->port_debugfs_root = NULL;
|
||||
atomic_dec(&bfa_debugfs_port_count);
|
||||
}
|
||||
|
||||
/* Remove the BFA debugfs root directory */
|
||||
if (atomic_read(&bfa_debugfs_port_count) == 0) {
|
||||
debugfs_remove(bfa_debugfs_root);
|
||||
bfa_debugfs_root = NULL;
|
||||
}
|
||||
}
|
||||
|
|
@ -111,6 +111,9 @@ struct bfad_port_s {
|
|||
struct bfad_im_port_s *im_port; /* IM specific data */
|
||||
struct bfad_tm_port_s *tm_port; /* TM specific data */
|
||||
struct bfad_ipfc_port_s *ipfc_port; /* IPFC specific data */
|
||||
|
||||
/* port debugfs specific data */
|
||||
struct dentry *port_debugfs_root;
|
||||
};
|
||||
|
||||
/*
|
||||
|
|
@ -186,6 +189,10 @@ struct bfad_s {
|
|||
struct fc_host_statistics link_stats;
|
||||
struct list_head pbc_pcfg_list;
|
||||
atomic_t wq_reqcnt;
|
||||
/* debugfs specific data */
|
||||
char *regdata;
|
||||
u32 reglen;
|
||||
struct dentry *bfad_dentry_files[5];
|
||||
};
|
||||
|
||||
struct bfad_pcfg_s {
|
||||
|
|
@ -276,7 +283,9 @@ void bfad_drv_uninit(struct bfad_s *bfad);
|
|||
void bfad_drv_log_level_set(struct bfad_s *bfad);
|
||||
bfa_status_t bfad_fc4_module_init(void);
|
||||
void bfad_fc4_module_exit(void);
|
||||
int bfad_worker (void *ptr);
|
||||
int bfad_worker(void *ptr);
|
||||
void bfad_debugfs_init(struct bfad_port_s *port);
|
||||
void bfad_debugfs_exit(struct bfad_port_s *port);
|
||||
|
||||
void bfad_pci_remove(struct pci_dev *pdev);
|
||||
int bfad_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid);
|
||||
|
|
@ -289,6 +298,7 @@ extern struct list_head bfad_list;
|
|||
extern int bfa_lun_queue_depth;
|
||||
extern int bfad_supported_fc4s;
|
||||
extern int bfa_linkup_delay;
|
||||
extern int bfa_debugfs_enable;
|
||||
extern struct mutex bfad_mutex;
|
||||
|
||||
#endif /* __BFAD_DRV_H__ */
|
||||
|
|
|
|||
Loading…
Reference in New Issue