forked from Minki/linux
GenWQE Debugfs interfaces
Debugfs interfaces for the GenWQE card. Help to debug potential
problems. Dump internal chip state for debugging and failure
determination.
Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Co-authors: Joerg-Stephan Vogt <jsvogt@de.ibm.com>,
Michael Jung <MIJUNG@de.ibm.com>,
Michael Ruettger <michael@ibmra.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Frank Haverkamp
Greg Kroah-Hartman
parent
67f4addbb8
commit
c59330cd7c
91
Documentation/ABI/testing/debugfs-driver-genwqe
Normal file
91
Documentation/ABI/testing/debugfs-driver-genwqe
Normal file
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@ -0,0 +1,91 @@
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/ddcb_info
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: DDCB queue dump used for debugging queueing problems.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/curr_regs
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Dump of the current error registers.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/curr_dbg_uid0
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Internal chip state of UID0 (unit id 0).
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/curr_dbg_uid1
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Internal chip state of UID1.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/curr_dbg_uid2
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Internal chip state of UID2.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/prev_regs
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Dump of the error registers before the last reset of
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the card occured.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/prev_dbg_uid0
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Internal chip state of UID0 before card was reset.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/prev_dbg_uid1
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Internal chip state of UID1 before card was reset.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/prev_dbg_uid2
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Internal chip state of UID2 before card was reset.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/info
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Comprehensive summary of bitstream version and software
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version. Used bitstream and bitstream clocking information.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/err_inject
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Possibility to inject error cases to ensure that the drivers
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error handling code works well.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/vf<0..14>_jobtimeout_msec
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Default VF timeout 250ms. Testing might require 1000ms.
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Using 0 will use the cards default value (whatever that is).
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The timeout depends on the max number of available cards
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in the system and the maximum allowed queue size.
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The driver ensures that the settings are done just before
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the VFs get enabled. Changing the timeouts in flight is not
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possible.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/jobtimer
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Date: Oct 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Dump job timeout register values for PF and VFs.
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Only available for PF.
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What: /sys/kernel/debug/genwqe/genwqe<n>_card/queue_working_time
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Date: Dec 2013
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Contact: haver@linux.vnet.ibm.com
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Description: Dump queue working time register values for PF and VFs.
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Only available for PF.
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500
drivers/misc/genwqe/card_debugfs.c
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500
drivers/misc/genwqe/card_debugfs.c
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@ -0,0 +1,500 @@
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/**
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* IBM Accelerator Family 'GenWQE'
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*
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* (C) Copyright IBM Corp. 2013
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*
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* Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
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* Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
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* Author: Michael Jung <mijung@de.ibm.com>
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* Author: Michael Ruettger <michael@ibmra.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/*
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* Debugfs interfaces for the GenWQE card. Help to debug potential
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* problems. Dump internal chip state for debugging and failure
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* determination.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include "card_base.h"
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#include "card_ddcb.h"
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#define GENWQE_DEBUGFS_RO(_name, _showfn) \
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static int genwqe_debugfs_##_name##_open(struct inode *inode, \
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struct file *file) \
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{ \
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return single_open(file, _showfn, inode->i_private); \
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} \
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static const struct file_operations genwqe_##_name##_fops = { \
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.open = genwqe_debugfs_##_name##_open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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}
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static void dbg_uidn_show(struct seq_file *s, struct genwqe_reg *regs,
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int entries)
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{
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unsigned int i;
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u32 v_hi, v_lo;
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for (i = 0; i < entries; i++) {
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v_hi = (regs[i].val >> 32) & 0xffffffff;
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v_lo = (regs[i].val) & 0xffffffff;
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seq_printf(s, " 0x%08x 0x%08x 0x%08x 0x%08x EXT_ERR_REC\n",
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regs[i].addr, regs[i].idx, v_hi, v_lo);
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}
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}
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static int curr_dbg_uidn_show(struct seq_file *s, void *unused, int uid)
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{
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struct genwqe_dev *cd = s->private;
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int entries;
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struct genwqe_reg *regs;
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entries = genwqe_ffdc_buff_size(cd, uid);
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if (entries < 0)
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return -EINVAL;
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if (entries == 0)
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return 0;
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regs = kcalloc(entries, sizeof(*regs), GFP_KERNEL);
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if (regs == NULL)
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return -ENOMEM;
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genwqe_stop_traps(cd); /* halt the traps while dumping data */
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genwqe_ffdc_buff_read(cd, uid, regs, entries);
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genwqe_start_traps(cd);
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dbg_uidn_show(s, regs, entries);
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kfree(regs);
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return 0;
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}
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static int genwqe_curr_dbg_uid0_show(struct seq_file *s, void *unused)
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{
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return curr_dbg_uidn_show(s, unused, 0);
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}
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GENWQE_DEBUGFS_RO(curr_dbg_uid0, genwqe_curr_dbg_uid0_show);
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static int genwqe_curr_dbg_uid1_show(struct seq_file *s, void *unused)
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{
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return curr_dbg_uidn_show(s, unused, 1);
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}
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GENWQE_DEBUGFS_RO(curr_dbg_uid1, genwqe_curr_dbg_uid1_show);
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static int genwqe_curr_dbg_uid2_show(struct seq_file *s, void *unused)
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{
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return curr_dbg_uidn_show(s, unused, 2);
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}
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GENWQE_DEBUGFS_RO(curr_dbg_uid2, genwqe_curr_dbg_uid2_show);
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static int prev_dbg_uidn_show(struct seq_file *s, void *unused, int uid)
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{
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struct genwqe_dev *cd = s->private;
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dbg_uidn_show(s, cd->ffdc[uid].regs, cd->ffdc[uid].entries);
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return 0;
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}
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static int genwqe_prev_dbg_uid0_show(struct seq_file *s, void *unused)
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{
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return prev_dbg_uidn_show(s, unused, 0);
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}
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GENWQE_DEBUGFS_RO(prev_dbg_uid0, genwqe_prev_dbg_uid0_show);
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static int genwqe_prev_dbg_uid1_show(struct seq_file *s, void *unused)
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{
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return prev_dbg_uidn_show(s, unused, 1);
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}
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GENWQE_DEBUGFS_RO(prev_dbg_uid1, genwqe_prev_dbg_uid1_show);
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static int genwqe_prev_dbg_uid2_show(struct seq_file *s, void *unused)
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{
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return prev_dbg_uidn_show(s, unused, 2);
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}
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GENWQE_DEBUGFS_RO(prev_dbg_uid2, genwqe_prev_dbg_uid2_show);
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static int genwqe_curr_regs_show(struct seq_file *s, void *unused)
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{
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struct genwqe_dev *cd = s->private;
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unsigned int i;
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struct genwqe_reg *regs;
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regs = kcalloc(GENWQE_FFDC_REGS, sizeof(*regs), GFP_KERNEL);
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if (regs == NULL)
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return -ENOMEM;
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genwqe_stop_traps(cd);
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genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 1);
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genwqe_start_traps(cd);
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for (i = 0; i < GENWQE_FFDC_REGS; i++) {
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if (regs[i].addr == 0xffffffff)
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break; /* invalid entries */
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if (regs[i].val == 0x0ull)
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continue; /* do not print 0x0 FIRs */
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seq_printf(s, " 0x%08x 0x%016llx\n",
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regs[i].addr, regs[i].val);
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}
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return 0;
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}
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GENWQE_DEBUGFS_RO(curr_regs, genwqe_curr_regs_show);
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static int genwqe_prev_regs_show(struct seq_file *s, void *unused)
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{
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struct genwqe_dev *cd = s->private;
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unsigned int i;
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struct genwqe_reg *regs = cd->ffdc[GENWQE_DBG_REGS].regs;
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if (regs == NULL)
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return -EINVAL;
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for (i = 0; i < GENWQE_FFDC_REGS; i++) {
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if (regs[i].addr == 0xffffffff)
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break; /* invalid entries */
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if (regs[i].val == 0x0ull)
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continue; /* do not print 0x0 FIRs */
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seq_printf(s, " 0x%08x 0x%016llx\n",
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regs[i].addr, regs[i].val);
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}
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return 0;
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}
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GENWQE_DEBUGFS_RO(prev_regs, genwqe_prev_regs_show);
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static int genwqe_jtimer_show(struct seq_file *s, void *unused)
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{
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struct genwqe_dev *cd = s->private;
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unsigned int vf_num;
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u64 jtimer;
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jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT, 0);
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seq_printf(s, " PF 0x%016llx %d msec\n", jtimer,
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genwqe_pf_jobtimeout_msec);
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for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
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jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT,
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vf_num + 1);
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seq_printf(s, " VF%-2d 0x%016llx %d msec\n", vf_num, jtimer,
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cd->vf_jobtimeout_msec[vf_num]);
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}
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return 0;
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}
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GENWQE_DEBUGFS_RO(jtimer, genwqe_jtimer_show);
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static int genwqe_queue_working_time_show(struct seq_file *s, void *unused)
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{
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struct genwqe_dev *cd = s->private;
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unsigned int vf_num;
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u64 t;
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t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, 0);
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seq_printf(s, " PF 0x%016llx\n", t);
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for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
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t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, vf_num + 1);
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seq_printf(s, " VF%-2d 0x%016llx\n", vf_num, t);
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}
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return 0;
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}
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GENWQE_DEBUGFS_RO(queue_working_time, genwqe_queue_working_time_show);
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static int genwqe_ddcb_info_show(struct seq_file *s, void *unused)
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{
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struct genwqe_dev *cd = s->private;
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unsigned int i;
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struct ddcb_queue *queue;
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struct ddcb *pddcb;
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queue = &cd->queue;
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seq_puts(s, "DDCB QUEUE:\n");
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seq_printf(s, " ddcb_max: %d\n"
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" ddcb_daddr: %016llx - %016llx\n"
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" ddcb_vaddr: %016llx\n"
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" ddcbs_in_flight: %u\n"
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" ddcbs_max_in_flight: %u\n"
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" ddcbs_completed: %u\n"
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" busy: %u\n"
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" irqs_processed: %u\n",
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queue->ddcb_max, (long long)queue->ddcb_daddr,
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(long long)queue->ddcb_daddr +
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(queue->ddcb_max * DDCB_LENGTH),
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(long long)queue->ddcb_vaddr, queue->ddcbs_in_flight,
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queue->ddcbs_max_in_flight, queue->ddcbs_completed,
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queue->busy, cd->irqs_processed);
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/* Hardware State */
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seq_printf(s, " 0x%08x 0x%016llx IO_QUEUE_CONFIG\n"
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" 0x%08x 0x%016llx IO_QUEUE_STATUS\n"
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" 0x%08x 0x%016llx IO_QUEUE_SEGMENT\n"
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" 0x%08x 0x%016llx IO_QUEUE_INITSQN\n"
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" 0x%08x 0x%016llx IO_QUEUE_WRAP\n"
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" 0x%08x 0x%016llx IO_QUEUE_OFFSET\n"
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" 0x%08x 0x%016llx IO_QUEUE_WTIME\n"
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" 0x%08x 0x%016llx IO_QUEUE_ERRCNTS\n"
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" 0x%08x 0x%016llx IO_QUEUE_LRW\n",
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queue->IO_QUEUE_CONFIG,
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__genwqe_readq(cd, queue->IO_QUEUE_CONFIG),
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queue->IO_QUEUE_STATUS,
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__genwqe_readq(cd, queue->IO_QUEUE_STATUS),
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queue->IO_QUEUE_SEGMENT,
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__genwqe_readq(cd, queue->IO_QUEUE_SEGMENT),
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queue->IO_QUEUE_INITSQN,
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__genwqe_readq(cd, queue->IO_QUEUE_INITSQN),
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queue->IO_QUEUE_WRAP,
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__genwqe_readq(cd, queue->IO_QUEUE_WRAP),
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queue->IO_QUEUE_OFFSET,
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__genwqe_readq(cd, queue->IO_QUEUE_OFFSET),
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queue->IO_QUEUE_WTIME,
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__genwqe_readq(cd, queue->IO_QUEUE_WTIME),
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queue->IO_QUEUE_ERRCNTS,
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__genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS),
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queue->IO_QUEUE_LRW,
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__genwqe_readq(cd, queue->IO_QUEUE_LRW));
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seq_printf(s, "DDCB list (ddcb_act=%d/ddcb_next=%d):\n",
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queue->ddcb_act, queue->ddcb_next);
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pddcb = queue->ddcb_vaddr;
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for (i = 0; i < queue->ddcb_max; i++) {
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seq_printf(s, " %-3d: RETC=%03x SEQ=%04x HSI/SHI=%02x/%02x ",
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i, be16_to_cpu(pddcb->retc_16),
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be16_to_cpu(pddcb->seqnum_16),
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pddcb->hsi, pddcb->shi);
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seq_printf(s, "PRIV=%06llx CMD=%02x\n",
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be64_to_cpu(pddcb->priv_64), pddcb->cmd);
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pddcb++;
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}
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return 0;
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}
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GENWQE_DEBUGFS_RO(ddcb_info, genwqe_ddcb_info_show);
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static int genwqe_info_show(struct seq_file *s, void *unused)
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{
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struct genwqe_dev *cd = s->private;
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u16 val16, type;
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u64 app_id, slu_id, bitstream = -1;
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||||
struct pci_dev *pci_dev = cd->pci_dev;
|
||||
|
||||
slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
|
||||
app_id = __genwqe_readq(cd, IO_APP_UNITCFG);
|
||||
|
||||
if (genwqe_is_privileged(cd))
|
||||
bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM);
|
||||
|
||||
val16 = (u16)(slu_id & 0x0fLLU);
|
||||
type = (u16)((slu_id >> 20) & 0xffLLU);
|
||||
|
||||
seq_printf(s, "%s driver version: %s\n"
|
||||
" Device Name/Type: %s %s CardIdx: %d\n"
|
||||
" SLU/APP Config : 0x%016llx/0x%016llx\n"
|
||||
" Build Date : %u/%x/%u\n"
|
||||
" Base Clock : %u MHz\n"
|
||||
" Arch/SVN Release: %u/%llx\n"
|
||||
" Bitstream : %llx\n",
|
||||
GENWQE_DEVNAME, DRV_VERS_STRING, dev_name(&pci_dev->dev),
|
||||
genwqe_is_privileged(cd) ?
|
||||
"Physical" : "Virtual or no SR-IOV",
|
||||
cd->card_idx, slu_id, app_id,
|
||||
(u16)((slu_id >> 12) & 0x0fLLU), /* month */
|
||||
(u16)((slu_id >> 4) & 0xffLLU), /* day */
|
||||
(u16)((slu_id >> 16) & 0x0fLLU) + 2010, /* year */
|
||||
genwqe_base_clock_frequency(cd),
|
||||
(u16)((slu_id >> 32) & 0xffLLU), slu_id >> 40,
|
||||
bitstream);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
GENWQE_DEBUGFS_RO(info, genwqe_info_show);
|
||||
|
||||
int genwqe_init_debugfs(struct genwqe_dev *cd)
|
||||
{
|
||||
struct dentry *root;
|
||||
struct dentry *file;
|
||||
int ret;
|
||||
char card_name[64];
|
||||
char name[64];
|
||||
unsigned int i;
|
||||
|
||||
sprintf(card_name, "%s%u_card", GENWQE_DEVNAME, cd->card_idx);
|
||||
|
||||
root = debugfs_create_dir(card_name, cd->debugfs_genwqe);
|
||||
if (!root) {
|
||||
ret = -ENOMEM;
|
||||
goto err0;
|
||||
}
|
||||
|
||||
/* non privileged interfaces are done here */
|
||||
file = debugfs_create_file("ddcb_info", S_IRUGO, root, cd,
|
||||
&genwqe_ddcb_info_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("info", S_IRUGO, root, cd,
|
||||
&genwqe_info_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_x64("err_inject", 0666, root, &cd->err_inject);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_u32("ddcb_software_timeout", 0666, root,
|
||||
&cd->ddcb_software_timeout);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_u32("kill_timeout", 0666, root,
|
||||
&cd->kill_timeout);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
/* privileged interfaces follow here */
|
||||
if (!genwqe_is_privileged(cd)) {
|
||||
cd->debugfs_root = root;
|
||||
return 0;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("curr_regs", S_IRUGO, root, cd,
|
||||
&genwqe_curr_regs_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("curr_dbg_uid0", S_IRUGO, root, cd,
|
||||
&genwqe_curr_dbg_uid0_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("curr_dbg_uid1", S_IRUGO, root, cd,
|
||||
&genwqe_curr_dbg_uid1_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("curr_dbg_uid2", S_IRUGO, root, cd,
|
||||
&genwqe_curr_dbg_uid2_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("prev_regs", S_IRUGO, root, cd,
|
||||
&genwqe_prev_regs_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("prev_dbg_uid0", S_IRUGO, root, cd,
|
||||
&genwqe_prev_dbg_uid0_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("prev_dbg_uid1", S_IRUGO, root, cd,
|
||||
&genwqe_prev_dbg_uid1_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("prev_dbg_uid2", S_IRUGO, root, cd,
|
||||
&genwqe_prev_dbg_uid2_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
for (i = 0; i < GENWQE_MAX_VFS; i++) {
|
||||
sprintf(name, "vf%d_jobtimeout_msec", i);
|
||||
|
||||
file = debugfs_create_u32(name, 0666, root,
|
||||
&cd->vf_jobtimeout_msec[i]);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
}
|
||||
|
||||
file = debugfs_create_file("jobtimer", S_IRUGO, root, cd,
|
||||
&genwqe_jtimer_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_file("queue_working_time", S_IRUGO, root, cd,
|
||||
&genwqe_queue_working_time_fops);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
file = debugfs_create_u32("skip_recovery", 0666, root,
|
||||
&cd->skip_recovery);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
cd->debugfs_root = root;
|
||||
return 0;
|
||||
err1:
|
||||
debugfs_remove_recursive(root);
|
||||
err0:
|
||||
return ret;
|
||||
}
|
||||
|
||||
void genqwe_exit_debugfs(struct genwqe_dev *cd)
|
||||
{
|
||||
debugfs_remove_recursive(cd->debugfs_root);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user