drivers/misc/genwqe/card_debugfs.c - arm/linux-arm64-legacy - Git at Google

 /**
  * IBM Accelerator Family 'GenWQE'
  *
  * (C) Copyright IBM Corp. 2013
  *
  * Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
  * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
  * Author: Michael Jung <mijung@de.ibm.com>
  * Author: Michael Ruettger <michael@ibmra.de>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License (version 2 only)
  * as published by the Free Software Foundation.
  *
  * 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.
  */

 /*
  * Debugfs interfaces for the GenWQE card. Help to debug potential
  * problems. Dump internal chip state for debugging and failure
  * determination.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/uaccess.h>

 #include "card_base.h"
 #include "card_ddcb.h"

 #define GENWQE_DEBUGFS_RO(_name, _showfn)				\
 	static int genwqe_debugfs_##_name##_open(struct inode *inode,	\
 						 struct file *file)	\
 	{								\
 		return single_open(file, _showfn, inode->i_private);	\
 	}								\
 	static const struct file_operations genwqe_##_name##_fops = {	\
 		.open = genwqe_debugfs_##_name##_open,			\
 		.read = seq_read,					\
 		.llseek = seq_lseek,					\
 		.release = single_release,				\
 	}

 static void dbg_uidn_show(struct seq_file *s, struct genwqe_reg *regs,
 			  int entries)
 {
 	unsigned int i;
 	u32 v_hi, v_lo;

 	for (i = 0; i < entries; i++) {
 		v_hi = (regs[i].val >> 32) & 0xffffffff;
 		v_lo = (regs[i].val)       & 0xffffffff;

 		seq_printf(s, "  0x%08x 0x%08x 0x%08x 0x%08x EXT_ERR_REC\n",
 			   regs[i].addr, regs[i].idx, v_hi, v_lo);
 	}
 }

 static int curr_dbg_uidn_show(struct seq_file *s, void *unused, int uid)
 {
 	struct genwqe_dev *cd = s->private;
 	int entries;
 	struct genwqe_reg *regs;

 	entries = genwqe_ffdc_buff_size(cd, uid);
 	if (entries < 0)
 		return -EINVAL;

 	if (entries == 0)
 		return 0;

 	regs = kcalloc(entries, sizeof(*regs), GFP_KERNEL);
 	if (regs == NULL)
 		return -ENOMEM;

 	genwqe_stop_traps(cd); /* halt the traps while dumping data */
 	genwqe_ffdc_buff_read(cd, uid, regs, entries);
 	genwqe_start_traps(cd);

 	dbg_uidn_show(s, regs, entries);
 	kfree(regs);
 	return 0;
 }

 static int genwqe_curr_dbg_uid0_show(struct seq_file *s, void *unused)
 {
 	return curr_dbg_uidn_show(s, unused, 0);
 }

 GENWQE_DEBUGFS_RO(curr_dbg_uid0, genwqe_curr_dbg_uid0_show);

 static int genwqe_curr_dbg_uid1_show(struct seq_file *s, void *unused)
 {
 	return curr_dbg_uidn_show(s, unused, 1);
 }

 GENWQE_DEBUGFS_RO(curr_dbg_uid1, genwqe_curr_dbg_uid1_show);

 static int genwqe_curr_dbg_uid2_show(struct seq_file *s, void *unused)
 {
 	return curr_dbg_uidn_show(s, unused, 2);
 }

 GENWQE_DEBUGFS_RO(curr_dbg_uid2, genwqe_curr_dbg_uid2_show);

 static int prev_dbg_uidn_show(struct seq_file *s, void *unused, int uid)
 {
 	struct genwqe_dev *cd = s->private;

 	dbg_uidn_show(s, cd->ffdc[uid].regs,  cd->ffdc[uid].entries);
 	return 0;
 }

 static int genwqe_prev_dbg_uid0_show(struct seq_file *s, void *unused)
 {
 	return prev_dbg_uidn_show(s, unused, 0);
 }

 GENWQE_DEBUGFS_RO(prev_dbg_uid0, genwqe_prev_dbg_uid0_show);

 static int genwqe_prev_dbg_uid1_show(struct seq_file *s, void *unused)
 {
 	return prev_dbg_uidn_show(s, unused, 1);
 }

 GENWQE_DEBUGFS_RO(prev_dbg_uid1, genwqe_prev_dbg_uid1_show);

 static int genwqe_prev_dbg_uid2_show(struct seq_file *s, void *unused)
 {
 	return prev_dbg_uidn_show(s, unused, 2);
 }

 GENWQE_DEBUGFS_RO(prev_dbg_uid2, genwqe_prev_dbg_uid2_show);

 static int genwqe_curr_regs_show(struct seq_file *s, void *unused)
 {
 	struct genwqe_dev *cd = s->private;
 	unsigned int i;
 	struct genwqe_reg *regs;

 	regs = kcalloc(GENWQE_FFDC_REGS, sizeof(*regs), GFP_KERNEL);
 	if (regs == NULL)
 		return -ENOMEM;

 	genwqe_stop_traps(cd);
 	genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 1);
 	genwqe_start_traps(cd);

 	for (i = 0; i < GENWQE_FFDC_REGS; i++) {
 		if (regs[i].addr == 0xffffffff)
 			break;  /* invalid entries */

 		if (regs[i].val == 0x0ull)
 			continue;  /* do not print 0x0 FIRs */

 		seq_printf(s, "  0x%08x 0x%016llx\n",
 			   regs[i].addr, regs[i].val);
 	}
 	return 0;
 }

 GENWQE_DEBUGFS_RO(curr_regs, genwqe_curr_regs_show);

 static int genwqe_prev_regs_show(struct seq_file *s, void *unused)
 {
 	struct genwqe_dev *cd = s->private;
 	unsigned int i;
 	struct genwqe_reg *regs = cd->ffdc[GENWQE_DBG_REGS].regs;

 	if (regs == NULL)
 		return -EINVAL;

 	for (i = 0; i < GENWQE_FFDC_REGS; i++) {
 		if (regs[i].addr == 0xffffffff)
 			break;  /* invalid entries */

 		if (regs[i].val == 0x0ull)
 			continue;  /* do not print 0x0 FIRs */

 		seq_printf(s, "  0x%08x 0x%016llx\n",
 			   regs[i].addr, regs[i].val);
 	}
 	return 0;
 }

 GENWQE_DEBUGFS_RO(prev_regs, genwqe_prev_regs_show);

 static int genwqe_jtimer_show(struct seq_file *s, void *unused)
 {
 	struct genwqe_dev *cd = s->private;
 	unsigned int vf_num;
 	u64 jtimer;

 	jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT, 0);
 	seq_printf(s, "  PF   0x%016llx %d msec\n", jtimer,
 		   genwqe_pf_jobtimeout_msec);

 	for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
 		jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT,
 					  vf_num + 1);
 		seq_printf(s, "  VF%-2d 0x%016llx %d msec\n", vf_num, jtimer,
 			   cd->vf_jobtimeout_msec[vf_num]);
 	}
 	return 0;
 }

 GENWQE_DEBUGFS_RO(jtimer, genwqe_jtimer_show);

 static int genwqe_queue_working_time_show(struct seq_file *s, void *unused)
 {
 	struct genwqe_dev *cd = s->private;
 	unsigned int vf_num;
 	u64 t;

 	t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, 0);
 	seq_printf(s, "  PF   0x%016llx\n", t);

 	for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
 		t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, vf_num + 1);
 		seq_printf(s, "  VF%-2d 0x%016llx\n", vf_num, t);
 	}
 	return 0;
 }

 GENWQE_DEBUGFS_RO(queue_working_time, genwqe_queue_working_time_show);

 static int genwqe_ddcb_info_show(struct seq_file *s, void *unused)
 {
 	struct genwqe_dev *cd = s->private;
 	unsigned int i;
 	struct ddcb_queue *queue;
 	struct ddcb *pddcb;

 	queue = &cd->queue;
 	seq_puts(s, "DDCB QUEUE:\n");
 	seq_printf(s, "  ddcb_max:            %d\n"
 		   "  ddcb_daddr:          %016llx - %016llx\n"
 		   "  ddcb_vaddr:          %016llx\n"
 		   "  ddcbs_in_flight:     %u\n"
 		   "  ddcbs_max_in_flight: %u\n"
 		   "  ddcbs_completed:     %u\n"
 		   "  busy:                %u\n"
 		   "  irqs_processed:      %u\n",
 		   queue->ddcb_max, (long long)queue->ddcb_daddr,
 		   (long long)queue->ddcb_daddr +
 		   (queue->ddcb_max * DDCB_LENGTH),
 		   (long long)queue->ddcb_vaddr, queue->ddcbs_in_flight,
 		   queue->ddcbs_max_in_flight, queue->ddcbs_completed,
 		   queue->busy, cd->irqs_processed);

 	/* Hardware State */
 	seq_printf(s, "  0x%08x 0x%016llx IO_QUEUE_CONFIG\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_STATUS\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_SEGMENT\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_INITSQN\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_WRAP\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_OFFSET\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_WTIME\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_ERRCNTS\n"
 		   "  0x%08x 0x%016llx IO_QUEUE_LRW\n",
 		   queue->IO_QUEUE_CONFIG,
 		   __genwqe_readq(cd, queue->IO_QUEUE_CONFIG),
 		   queue->IO_QUEUE_STATUS,
 		   __genwqe_readq(cd, queue->IO_QUEUE_STATUS),
 		   queue->IO_QUEUE_SEGMENT,
 		   __genwqe_readq(cd, queue->IO_QUEUE_SEGMENT),
 		   queue->IO_QUEUE_INITSQN,
 		   __genwqe_readq(cd, queue->IO_QUEUE_INITSQN),
 		   queue->IO_QUEUE_WRAP,
 		   __genwqe_readq(cd, queue->IO_QUEUE_WRAP),
 		   queue->IO_QUEUE_OFFSET,
 		   __genwqe_readq(cd, queue->IO_QUEUE_OFFSET),
 		   queue->IO_QUEUE_WTIME,
 		   __genwqe_readq(cd, queue->IO_QUEUE_WTIME),
 		   queue->IO_QUEUE_ERRCNTS,
 		   __genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS),
 		   queue->IO_QUEUE_LRW,
 		   __genwqe_readq(cd, queue->IO_QUEUE_LRW));

 	seq_printf(s, "DDCB list (ddcb_act=%d/ddcb_next=%d):\n",
 		   queue->ddcb_act, queue->ddcb_next);

 	pddcb = queue->ddcb_vaddr;
 	for (i = 0; i < queue->ddcb_max; i++) {
 		seq_printf(s, "  %-3d: RETC=%03x SEQ=%04x HSI/SHI=%02x/%02x ",
 			   i, be16_to_cpu(pddcb->retc_16),
 			   be16_to_cpu(pddcb->seqnum_16),
 			   pddcb->hsi, pddcb->shi);
 		seq_printf(s, "PRIV=%06llx CMD=%02x\n",
 			   be64_to_cpu(pddcb->priv_64), pddcb->cmd);
 		pddcb++;
 	}
 	return 0;
 }

 GENWQE_DEBUGFS_RO(ddcb_info, genwqe_ddcb_info_show);

 static int genwqe_info_show(struct seq_file *s, void *unused)
 {
 	struct genwqe_dev *cd = s->private;
 	u16 val16, type;
 	u64 app_id, slu_id, bitstream = -1;
 	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%d_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%u_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);
 }
	/**
	* IBM Accelerator Family 'GenWQE'
	*
	* (C) Copyright IBM Corp. 2013
	*
	* Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
	* Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
	* Author: Michael Jung <mijung@de.ibm.com>
	* Author: Michael Ruettger <michael@ibmra.de>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License (version 2 only)
	* as published by the Free Software Foundation.
	*
	* 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.
	*/

	/*
	* Debugfs interfaces for the GenWQE card. Help to debug potential
	* problems. Dump internal chip state for debugging and failure
	* determination.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/debugfs.h>
	#include <linux/seq_file.h>
	#include <linux/uaccess.h>

	#include "card_base.h"
	#include "card_ddcb.h"

	#define GENWQE_DEBUGFS_RO(_name, _showfn) \
	static int genwqe_debugfs_##_name##_open(struct inode *inode, \
	struct file *file) \
	{ \
	return single_open(file, _showfn, inode->i_private); \
	} \
	static const struct file_operations genwqe_##_name##_fops = { \
	.open = genwqe_debugfs_##_name##_open, \
	.read = seq_read, \
	.llseek = seq_lseek, \
	.release = single_release, \
	}

	static void dbg_uidn_show(struct seq_file s, struct genwqe_reg regs,
	int entries)
	{
	unsigned int i;
	u32 v_hi, v_lo;

	for (i = 0; i < entries; i++) {
	v_hi = (regs[i].val >> 32) & 0xffffffff;
	v_lo = (regs[i].val) & 0xffffffff;

	seq_printf(s, " 0x%08x 0x%08x 0x%08x 0x%08x EXT_ERR_REC\n",
	regs[i].addr, regs[i].idx, v_hi, v_lo);
	}
	}

	static int curr_dbg_uidn_show(struct seq_file s, void unused, int uid)
	{
	struct genwqe_dev *cd = s->private;
	int entries;
	struct genwqe_reg *regs;

	entries = genwqe_ffdc_buff_size(cd, uid);
	if (entries < 0)
	return -EINVAL;

	if (entries == 0)
	return 0;

	regs = kcalloc(entries, sizeof(*regs), GFP_KERNEL);
	if (regs == NULL)
	return -ENOMEM;

	genwqe_stop_traps(cd); /* halt the traps while dumping data */
	genwqe_ffdc_buff_read(cd, uid, regs, entries);
	genwqe_start_traps(cd);

	dbg_uidn_show(s, regs, entries);
	kfree(regs);
	return 0;
	}

	static int genwqe_curr_dbg_uid0_show(struct seq_file s, void unused)
	{
	return curr_dbg_uidn_show(s, unused, 0);
	}

	GENWQE_DEBUGFS_RO(curr_dbg_uid0, genwqe_curr_dbg_uid0_show);

	static int genwqe_curr_dbg_uid1_show(struct seq_file s, void unused)
	{
	return curr_dbg_uidn_show(s, unused, 1);
	}

	GENWQE_DEBUGFS_RO(curr_dbg_uid1, genwqe_curr_dbg_uid1_show);

	static int genwqe_curr_dbg_uid2_show(struct seq_file s, void unused)
	{
	return curr_dbg_uidn_show(s, unused, 2);
	}

	GENWQE_DEBUGFS_RO(curr_dbg_uid2, genwqe_curr_dbg_uid2_show);

	static int prev_dbg_uidn_show(struct seq_file s, void unused, int uid)
	{
	struct genwqe_dev *cd = s->private;

	dbg_uidn_show(s, cd->ffdc[uid].regs, cd->ffdc[uid].entries);
	return 0;
	}

	static int genwqe_prev_dbg_uid0_show(struct seq_file s, void unused)
	{
	return prev_dbg_uidn_show(s, unused, 0);
	}

	GENWQE_DEBUGFS_RO(prev_dbg_uid0, genwqe_prev_dbg_uid0_show);

	static int genwqe_prev_dbg_uid1_show(struct seq_file s, void unused)
	{
	return prev_dbg_uidn_show(s, unused, 1);
	}

	GENWQE_DEBUGFS_RO(prev_dbg_uid1, genwqe_prev_dbg_uid1_show);

	static int genwqe_prev_dbg_uid2_show(struct seq_file s, void unused)
	{
	return prev_dbg_uidn_show(s, unused, 2);
	}

	GENWQE_DEBUGFS_RO(prev_dbg_uid2, genwqe_prev_dbg_uid2_show);

	static int genwqe_curr_regs_show(struct seq_file s, void unused)
	{
	struct genwqe_dev *cd = s->private;
	unsigned int i;
	struct genwqe_reg *regs;

	regs = kcalloc(GENWQE_FFDC_REGS, sizeof(*regs), GFP_KERNEL);
	if (regs == NULL)
	return -ENOMEM;

	genwqe_stop_traps(cd);
	genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 1);
	genwqe_start_traps(cd);

	for (i = 0; i < GENWQE_FFDC_REGS; i++) {
	if (regs[i].addr == 0xffffffff)
	break; /* invalid entries */

	if (regs[i].val == 0x0ull)
	continue; /* do not print 0x0 FIRs */

	seq_printf(s, " 0x%08x 0x%016llx\n",
	regs[i].addr, regs[i].val);
	}
	return 0;
	}

	GENWQE_DEBUGFS_RO(curr_regs, genwqe_curr_regs_show);

	static int genwqe_prev_regs_show(struct seq_file s, void unused)
	{
	struct genwqe_dev *cd = s->private;
	unsigned int i;
	struct genwqe_reg *regs = cd->ffdc[GENWQE_DBG_REGS].regs;

	if (regs == NULL)
	return -EINVAL;

	for (i = 0; i < GENWQE_FFDC_REGS; i++) {
	if (regs[i].addr == 0xffffffff)
	break; /* invalid entries */

	if (regs[i].val == 0x0ull)
	continue; /* do not print 0x0 FIRs */

	seq_printf(s, " 0x%08x 0x%016llx\n",
	regs[i].addr, regs[i].val);
	}
	return 0;
	}

	GENWQE_DEBUGFS_RO(prev_regs, genwqe_prev_regs_show);

	static int genwqe_jtimer_show(struct seq_file s, void unused)
	{
	struct genwqe_dev *cd = s->private;
	unsigned int vf_num;
	u64 jtimer;

	jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT, 0);
	seq_printf(s, " PF 0x%016llx %d msec\n", jtimer,
	genwqe_pf_jobtimeout_msec);

	for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
	jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT,
	vf_num + 1);
	seq_printf(s, " VF%-2d 0x%016llx %d msec\n", vf_num, jtimer,
	cd->vf_jobtimeout_msec[vf_num]);
	}
	return 0;
	}

	GENWQE_DEBUGFS_RO(jtimer, genwqe_jtimer_show);

	static int genwqe_queue_working_time_show(struct seq_file s, void unused)
	{
	struct genwqe_dev *cd = s->private;
	unsigned int vf_num;
	u64 t;

	t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, 0);
	seq_printf(s, " PF 0x%016llx\n", t);

	for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
	t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, vf_num + 1);
	seq_printf(s, " VF%-2d 0x%016llx\n", vf_num, t);
	}
	return 0;
	}

	GENWQE_DEBUGFS_RO(queue_working_time, genwqe_queue_working_time_show);

	static int genwqe_ddcb_info_show(struct seq_file s, void unused)
	{
	struct genwqe_dev *cd = s->private;
	unsigned int i;
	struct ddcb_queue *queue;
	struct ddcb *pddcb;

	queue = &cd->queue;
	seq_puts(s, "DDCB QUEUE:\n");
	seq_printf(s, " ddcb_max: %d\n"
	" ddcb_daddr: %016llx - %016llx\n"
	" ddcb_vaddr: %016llx\n"
	" ddcbs_in_flight: %u\n"
	" ddcbs_max_in_flight: %u\n"
	" ddcbs_completed: %u\n"
	" busy: %u\n"
	" irqs_processed: %u\n",
	queue->ddcb_max, (long long)queue->ddcb_daddr,
	(long long)queue->ddcb_daddr +
	(queue->ddcb_max * DDCB_LENGTH),
	(long long)queue->ddcb_vaddr, queue->ddcbs_in_flight,
	queue->ddcbs_max_in_flight, queue->ddcbs_completed,
	queue->busy, cd->irqs_processed);

	/* Hardware State */
	seq_printf(s, " 0x%08x 0x%016llx IO_QUEUE_CONFIG\n"
	" 0x%08x 0x%016llx IO_QUEUE_STATUS\n"
	" 0x%08x 0x%016llx IO_QUEUE_SEGMENT\n"
	" 0x%08x 0x%016llx IO_QUEUE_INITSQN\n"
	" 0x%08x 0x%016llx IO_QUEUE_WRAP\n"
	" 0x%08x 0x%016llx IO_QUEUE_OFFSET\n"
	" 0x%08x 0x%016llx IO_QUEUE_WTIME\n"
	" 0x%08x 0x%016llx IO_QUEUE_ERRCNTS\n"
	" 0x%08x 0x%016llx IO_QUEUE_LRW\n",
	queue->IO_QUEUE_CONFIG,
	__genwqe_readq(cd, queue->IO_QUEUE_CONFIG),
	queue->IO_QUEUE_STATUS,
	__genwqe_readq(cd, queue->IO_QUEUE_STATUS),
	queue->IO_QUEUE_SEGMENT,
	__genwqe_readq(cd, queue->IO_QUEUE_SEGMENT),
	queue->IO_QUEUE_INITSQN,
	__genwqe_readq(cd, queue->IO_QUEUE_INITSQN),
	queue->IO_QUEUE_WRAP,
	__genwqe_readq(cd, queue->IO_QUEUE_WRAP),
	queue->IO_QUEUE_OFFSET,
	__genwqe_readq(cd, queue->IO_QUEUE_OFFSET),
	queue->IO_QUEUE_WTIME,
	__genwqe_readq(cd, queue->IO_QUEUE_WTIME),
	queue->IO_QUEUE_ERRCNTS,
	__genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS),
	queue->IO_QUEUE_LRW,
	__genwqe_readq(cd, queue->IO_QUEUE_LRW));

	seq_printf(s, "DDCB list (ddcb_act=%d/ddcb_next=%d):\n",
	queue->ddcb_act, queue->ddcb_next);

	pddcb = queue->ddcb_vaddr;
	for (i = 0; i < queue->ddcb_max; i++) {
	seq_printf(s, " %-3d: RETC=%03x SEQ=%04x HSI/SHI=%02x/%02x ",
	i, be16_to_cpu(pddcb->retc_16),
	be16_to_cpu(pddcb->seqnum_16),
	pddcb->hsi, pddcb->shi);
	seq_printf(s, "PRIV=%06llx CMD=%02x\n",
	be64_to_cpu(pddcb->priv_64), pddcb->cmd);
	pddcb++;
	}
	return 0;
	}

	GENWQE_DEBUGFS_RO(ddcb_info, genwqe_ddcb_info_show);

	static int genwqe_info_show(struct seq_file s, void unused)
	{
	struct genwqe_dev *cd = s->private;
	u16 val16, type;
	u64 app_id, slu_id, bitstream = -1;
	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%d_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%u_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);
	}