[mirror_ubuntu-jammy-kernel.git] / drivers / net / ethernet / brocade / bna / bnad_debugfs.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Linux network driver for QLogic BR-series Converged Network Adapter.
 */
/*
 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
 * Copyright (c) 2014-2015 QLogic Corporation
 * All rights reserved
 * www.qlogic.com
 */

#include <linux/debugfs.h>
#include <linux/module.h>
#include "bnad.h"

/*
 * BNA debufs interface
 *
 * To access the interface, debugfs file system should be mounted
 * if not already mounted using:
 *	mount -t debugfs none /sys/kernel/debug
 *
 * BNA Hierarchy:
 *	- bna/pci_dev:<pci_name>
 * where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
 *
 * Debugging service available per pci_dev:
 *	fwtrc:  To collect current firmware trace.
 *	fwsave: To collect last saved fw trace as a result of firmware crash.
 *	regwr:  To write one word to chip register
 *	regrd:  To read one or more words from chip register.
 */

struct bnad_debug_info {
	char *debug_buffer;
	void *i_private;
	int buffer_len;
};

static int
bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
{
	struct bnad *bnad = inode->i_private;
	struct bnad_debug_info *fw_debug;
	unsigned long flags;
	int rc;

	fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	if (!fw_debug)
		return -ENOMEM;

	fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;

	fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
	if (!fw_debug->debug_buffer) {
		kfree(fw_debug);
		fw_debug = NULL;
		return -ENOMEM;
	}

	spin_lock_irqsave(&bnad->bna_lock, flags);
	rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
			fw_debug->debug_buffer,
			&fw_debug->buffer_len);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	if (rc != BFA_STATUS_OK) {
		kfree(fw_debug->debug_buffer);
		fw_debug->debug_buffer = NULL;
		kfree(fw_debug);
		fw_debug = NULL;
		netdev_warn(bnad->netdev, "failed to collect fwtrc\n");
		return -ENOMEM;
	}

	file->private_data = fw_debug;

	return 0;
}

static int
bnad_debugfs_open_fwsave(struct inode *inode, struct file *file)
{
	struct bnad *bnad = inode->i_private;
	struct bnad_debug_info *fw_debug;
	unsigned long flags;
	int rc;

	fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	if (!fw_debug)
		return -ENOMEM;

	fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;

	fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
	if (!fw_debug->debug_buffer) {
		kfree(fw_debug);
		fw_debug = NULL;
		return -ENOMEM;
	}

	spin_lock_irqsave(&bnad->bna_lock, flags);
	rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
			fw_debug->debug_buffer,
			&fw_debug->buffer_len);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
		kfree(fw_debug->debug_buffer);
		fw_debug->debug_buffer = NULL;
		kfree(fw_debug);
		fw_debug = NULL;
		netdev_warn(bnad->netdev, "failed to collect fwsave\n");
		return -ENOMEM;
	}

	file->private_data = fw_debug;

	return 0;
}

static int
bnad_debugfs_open_reg(struct inode *inode, struct file *file)
{
	struct bnad_debug_info *reg_debug;

	reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	if (!reg_debug)
		return -ENOMEM;

	reg_debug->i_private = inode->i_private;

	file->private_data = reg_debug;

	return 0;
}

static int
bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len)
{
	struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer;
	struct bnad_iocmd_comp fcomp;
	unsigned long flags = 0;
	int ret = BFA_STATUS_FAILED;

	/* Get IOC info */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	/* Retrieve CEE related info */
	fcomp.bnad = bnad;
	fcomp.comp_status = 0;
	init_completion(&fcomp.comp);
	spin_lock_irqsave(&bnad->bna_lock, flags);
	ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
				bnad_cb_completion, &fcomp);
	if (ret != BFA_STATUS_OK) {
		spin_unlock_irqrestore(&bnad->bna_lock, flags);
		goto out;
	}
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	wait_for_completion(&fcomp.comp);
	drvinfo->cee_status = fcomp.comp_status;

	/* Retrieve flash partition info */
	fcomp.comp_status = 0;
	reinit_completion(&fcomp.comp);
	spin_lock_irqsave(&bnad->bna_lock, flags);
	ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
				bnad_cb_completion, &fcomp);
	if (ret != BFA_STATUS_OK) {
		spin_unlock_irqrestore(&bnad->bna_lock, flags);
		goto out;
	}
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	wait_for_completion(&fcomp.comp);
	drvinfo->flash_status = fcomp.comp_status;
out:
	return ret;
}

static int
bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file)
{
	struct bnad *bnad = inode->i_private;
	struct bnad_debug_info *drv_info;
	int rc;

	drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	if (!drv_info)
		return -ENOMEM;

	drv_info->buffer_len = sizeof(struct bnad_drvinfo);

	drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
	if (!drv_info->debug_buffer) {
		kfree(drv_info);
		drv_info = NULL;
		return -ENOMEM;
	}

	mutex_lock(&bnad->conf_mutex);
	rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
				drv_info->buffer_len);
	mutex_unlock(&bnad->conf_mutex);
	if (rc != BFA_STATUS_OK) {
		kfree(drv_info->debug_buffer);
		drv_info->debug_buffer = NULL;
		kfree(drv_info);
		drv_info = NULL;
		netdev_warn(bnad->netdev, "failed to collect drvinfo\n");
		return -ENOMEM;
	}

	file->private_data = drv_info;

	return 0;
}

/* Changes the current file position */
static loff_t
bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
{
	struct bnad_debug_info *debug = file->private_data;

	if (!debug)
		return -EINVAL;

	return fixed_size_llseek(file, offset, orig, debug->buffer_len);
}

static ssize_t
bnad_debugfs_read(struct file *file, char __user *buf,
		  size_t nbytes, loff_t *pos)
{
	struct bnad_debug_info *debug = file->private_data;

	if (!debug || !debug->debug_buffer)
		return 0;

	return simple_read_from_buffer(buf, nbytes, pos,
				debug->debug_buffer, debug->buffer_len);
}

#define BFA_REG_CT_ADDRSZ	(0x40000)
#define BFA_REG_CB_ADDRSZ	(0x20000)
#define BFA_REG_ADDRSZ(__ioc)	\
	((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ?  \
	 BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
#define BFA_REG_ADDRMSK(__ioc)	(BFA_REG_ADDRSZ(__ioc) - 1)

/*
 * Function to check if the register offset passed is valid.
 */
static int
bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
{
	u8 area;

	/* check [16:15] */
	area = (offset >> 15) & 0x7;
	if (area == 0) {
		/* PCIe core register */
		if (offset + (len << 2) > 0x8000)	/* 8k dwords or 32KB */
			return BFA_STATUS_EINVAL;
	} else if (area == 0x1) {
		/* CB 32 KB memory page */
		if (offset + (len << 2) > 0x10000)	/* 8k dwords or 32KB */
			return BFA_STATUS_EINVAL;
	} else {
		/* CB register space 64KB */
		if (offset + (len << 2) > BFA_REG_ADDRMSK(ioc))
			return BFA_STATUS_EINVAL;
	}
	return BFA_STATUS_OK;
}

static ssize_t
bnad_debugfs_read_regrd(struct file *file, char __user *buf,
			size_t nbytes, loff_t *pos)
{
	struct bnad_debug_info *regrd_debug = file->private_data;
	struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
	ssize_t rc;

	if (!bnad->regdata)
		return 0;

	rc = simple_read_from_buffer(buf, nbytes, pos,
			bnad->regdata, bnad->reglen);

	if ((*pos + nbytes) >= bnad->reglen) {
		kfree(bnad->regdata);
		bnad->regdata = NULL;
		bnad->reglen = 0;
	}

	return rc;
}

static ssize_t
bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
		size_t nbytes, loff_t *ppos)
{
	struct bnad_debug_info *regrd_debug = file->private_data;
	struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
	struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
	int rc, i;
	u32 addr, len;
	u32 *regbuf;
	void __iomem *rb, *reg_addr;
	unsigned long flags;
	void *kern_buf;

	/* Copy the user space buf */
	kern_buf = memdup_user(buf, nbytes);
	if (IS_ERR(kern_buf))
		return PTR_ERR(kern_buf);

	rc = sscanf(kern_buf, "%x:%x", &addr, &len);
	if (rc < 2 || len > UINT_MAX >> 2) {
		netdev_warn(bnad->netdev, "failed to read user buffer\n");
		kfree(kern_buf);
		return -EINVAL;
	}

	kfree(kern_buf);
	kfree(bnad->regdata);
	bnad->reglen = 0;

	bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
	if (!bnad->regdata)
		return -ENOMEM;

	bnad->reglen = len << 2;
	rb = bfa_ioc_bar0(ioc);
	addr &= BFA_REG_ADDRMSK(ioc);

	/* offset and len sanity check */
	rc = bna_reg_offset_check(ioc, addr, len);
	if (rc) {
		netdev_warn(bnad->netdev, "failed reg offset check\n");
		kfree(bnad->regdata);
		bnad->regdata = NULL;
		bnad->reglen = 0;
		return -EINVAL;
	}

	reg_addr = rb + addr;
	regbuf =  (u32 *)bnad->regdata;
	spin_lock_irqsave(&bnad->bna_lock, flags);
	for (i = 0; i < len; i++) {
		*regbuf = readl(reg_addr);
		regbuf++;
		reg_addr += sizeof(u32);
	}
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return nbytes;
}

static ssize_t
bnad_debugfs_write_regwr(struct file *file, const char __user *buf,
		size_t nbytes, loff_t *ppos)
{
	struct bnad_debug_info *debug = file->private_data;
	struct bnad *bnad = (struct bnad *)debug->i_private;
	struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
	int rc;
	u32 addr, val;
	void __iomem *reg_addr;
	unsigned long flags;
	void *kern_buf;

	/* Copy the user space buf */
	kern_buf = memdup_user(buf, nbytes);
	if (IS_ERR(kern_buf))
		return PTR_ERR(kern_buf);

	rc = sscanf(kern_buf, "%x:%x", &addr, &val);
	if (rc < 2) {
		netdev_warn(bnad->netdev, "failed to read user buffer\n");
		kfree(kern_buf);
		return -EINVAL;
	}
	kfree(kern_buf);

	addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */

	/* offset and len sanity check */
	rc = bna_reg_offset_check(ioc, addr, 1);
	if (rc) {
		netdev_warn(bnad->netdev, "failed reg offset check\n");
		return -EINVAL;
	}

	reg_addr = (bfa_ioc_bar0(ioc)) + addr;
	spin_lock_irqsave(&bnad->bna_lock, flags);
	writel(val, reg_addr);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return nbytes;
}

static int
bnad_debugfs_release(struct inode *inode, struct file *file)
{
	struct bnad_debug_info *debug = file->private_data;

	if (!debug)
		return 0;

	file->private_data = NULL;
	kfree(debug);
	return 0;
}

static int
bnad_debugfs_buffer_release(struct inode *inode, struct file *file)
{
	struct bnad_debug_info *debug = file->private_data;

	if (!debug)
		return 0;

	kfree(debug->debug_buffer);

	file->private_data = NULL;
	kfree(debug);
	debug = NULL;
	return 0;
}

static const struct file_operations bnad_debugfs_op_fwtrc = {
	.owner		=	THIS_MODULE,
	.open		=	bnad_debugfs_open_fwtrc,
	.llseek		=	bnad_debugfs_lseek,
	.read		=	bnad_debugfs_read,
	.release	=	bnad_debugfs_buffer_release,
};

static const struct file_operations bnad_debugfs_op_fwsave = {
	.owner		=	THIS_MODULE,
	.open		=	bnad_debugfs_open_fwsave,
	.llseek		=	bnad_debugfs_lseek,
	.read		=	bnad_debugfs_read,
	.release	=	bnad_debugfs_buffer_release,
};

static const struct file_operations bnad_debugfs_op_regrd = {
	.owner		=       THIS_MODULE,
	.open		=	bnad_debugfs_open_reg,
	.llseek		=	bnad_debugfs_lseek,
	.read		=	bnad_debugfs_read_regrd,
	.write		=	bnad_debugfs_write_regrd,
	.release	=	bnad_debugfs_release,
};

static const struct file_operations bnad_debugfs_op_regwr = {
	.owner		=	THIS_MODULE,
	.open		=	bnad_debugfs_open_reg,
	.llseek		=	bnad_debugfs_lseek,
	.write		=	bnad_debugfs_write_regwr,
	.release	=	bnad_debugfs_release,
};

static const struct file_operations bnad_debugfs_op_drvinfo = {
	.owner		=	THIS_MODULE,
	.open		=	bnad_debugfs_open_drvinfo,
	.llseek		=	bnad_debugfs_lseek,
	.read		=	bnad_debugfs_read,
	.release	=	bnad_debugfs_buffer_release,
};

struct bnad_debugfs_entry {
	const char *name;
	umode_t  mode;
	const struct file_operations *fops;
};

static const struct bnad_debugfs_entry bnad_debugfs_files[] = {
	{ "fwtrc",  S_IFREG | 0444, &bnad_debugfs_op_fwtrc, },
	{ "fwsave", S_IFREG | 0444, &bnad_debugfs_op_fwsave, },
	{ "regrd",  S_IFREG | 0644, &bnad_debugfs_op_regrd, },
	{ "regwr",  S_IFREG | 0200, &bnad_debugfs_op_regwr, },
	{ "drvinfo", S_IFREG | 0444, &bnad_debugfs_op_drvinfo, },
};

static struct dentry *bna_debugfs_root;
static atomic_t bna_debugfs_port_count;

/* Initialize debugfs interface for BNA */
void
bnad_debugfs_init(struct bnad *bnad)
{
	const struct bnad_debugfs_entry *file;
	char name[64];
	int i;

	/* Setup the BNA debugfs root directory*/
	if (!bna_debugfs_root) {
		bna_debugfs_root = debugfs_create_dir("bna", NULL);
		atomic_set(&bna_debugfs_port_count, 0);
		if (!bna_debugfs_root) {
			netdev_warn(bnad->netdev,
				    "debugfs root dir creation failed\n");
			return;
		}
	}

	/* Setup the pci_dev debugfs directory for the port */
	snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev));
	if (!bnad->port_debugfs_root) {
		bnad->port_debugfs_root =
			debugfs_create_dir(name, bna_debugfs_root);
		if (!bnad->port_debugfs_root) {
			netdev_warn(bnad->netdev,
				    "debugfs root dir creation failed\n");
			return;
		}

		atomic_inc(&bna_debugfs_port_count);

		for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
			file = &bnad_debugfs_files[i];
			bnad->bnad_dentry_files[i] =
					debugfs_create_file(file->name,
							file->mode,
							bnad->port_debugfs_root,
							bnad,
							file->fops);
			if (!bnad->bnad_dentry_files[i]) {
				netdev_warn(bnad->netdev,
					    "create %s entry failed\n",
					    file->name);
				return;
			}
		}
	}
}

/* Uninitialize debugfs interface for BNA */
void
bnad_debugfs_uninit(struct bnad *bnad)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
		if (bnad->bnad_dentry_files[i]) {
			debugfs_remove(bnad->bnad_dentry_files[i]);
			bnad->bnad_dentry_files[i] = NULL;
		}
	}

	/* Remove the pci_dev debugfs directory for the port */
	if (bnad->port_debugfs_root) {
		debugfs_remove(bnad->port_debugfs_root);
		bnad->port_debugfs_root = NULL;
		atomic_dec(&bna_debugfs_port_count);
	}

	/* Remove the BNA debugfs root directory */
	if (atomic_read(&bna_debugfs_port_count) == 0) {
		debugfs_remove(bna_debugfs_root);
		bna_debugfs_root = NULL;
	}
}
Commit	Line	Data
52fa7bf9	1	// SPDX-License-Identifier: GPL-2.0-only
7afc5dbd	2	/*
2732ba56	3	* Linux network driver for QLogic BR-series Converged Network Adapter.
7afc5dbd KG	4	*/
7afc5dbd KG	5	/*
2732ba56 RM	6	* Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
2732ba56 RM	7	* Copyright (c) 2014-2015 QLogic Corporation
7afc5dbd	8	* All rights reserved
2732ba56	9	* www.qlogic.com
7afc5dbd KG	10	*/
	11
	12	#include <linux/debugfs.h>
	13	#include <linux/module.h>
	14	#include "bnad.h"
	15
	16	/*
	17	* BNA debufs interface
	18	*
	19	* To access the interface, debugfs file system should be mounted
	20	* if not already mounted using:
	21	* mount -t debugfs none /sys/kernel/debug
	22	*
	23	* BNA Hierarchy:
	24	* - bna/pci_dev:<pci_name>
	25	* where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
	26	*
	27	* Debugging service available per pci_dev:
	28	* fwtrc: To collect current firmware trace.
	29	* fwsave: To collect last saved fw trace as a result of firmware crash.
	30	* regwr: To write one word to chip register
	31	* regrd: To read one or more words from chip register.
	32	*/
	33
	34	struct bnad_debug_info {
	35	char *debug_buffer;
	36	void *i_private;
	37	int buffer_len;
	38	};
	39
	40	static int
	41	bnad_debugfs_open_fwtrc(struct inode inode, struct file file)
	42	{
	43	struct bnad *bnad = inode->i_private;
	44	struct bnad_debug_info *fw_debug;
	45	unsigned long flags;
	46	int rc;
	47
	48	fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	49	if (!fw_debug)
	50	return -ENOMEM;
	51
	52	fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
	53
	54	fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
	55	if (!fw_debug->debug_buffer) {
	56	kfree(fw_debug);
	57	fw_debug = NULL;
7afc5dbd KG	58	return -ENOMEM;
	59	}
	60
	61	spin_lock_irqsave(&bnad->bna_lock, flags);
	62	rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
	63	fw_debug->debug_buffer,
	64	&fw_debug->buffer_len);
	65	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	66	if (rc != BFA_STATUS_OK) {
	67	kfree(fw_debug->debug_buffer);
	68	fw_debug->debug_buffer = NULL;
	69	kfree(fw_debug);
	70	fw_debug = NULL;
ecc46789	71	netdev_warn(bnad->netdev, "failed to collect fwtrc\n");
7afc5dbd KG	72	return -ENOMEM;
	73	}
	74
	75	file->private_data = fw_debug;
	76
	77	return 0;
	78	}
	79
	80	static int
	81	bnad_debugfs_open_fwsave(struct inode inode, struct file file)
	82	{
	83	struct bnad *bnad = inode->i_private;
	84	struct bnad_debug_info *fw_debug;
	85	unsigned long flags;
	86	int rc;
	87
	88	fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	89	if (!fw_debug)
	90	return -ENOMEM;
	91
	92	fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
	93
	94	fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
	95	if (!fw_debug->debug_buffer) {
	96	kfree(fw_debug);
	97	fw_debug = NULL;
7afc5dbd KG	98	return -ENOMEM;
	99	}
	100
	101	spin_lock_irqsave(&bnad->bna_lock, flags);
	102	rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
	103	fw_debug->debug_buffer,
	104	&fw_debug->buffer_len);
	105	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	106	if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
	107	kfree(fw_debug->debug_buffer);
	108	fw_debug->debug_buffer = NULL;
	109	kfree(fw_debug);
	110	fw_debug = NULL;
ecc46789	111	netdev_warn(bnad->netdev, "failed to collect fwsave\n");
7afc5dbd KG	112	return -ENOMEM;
	113	}
	114
	115	file->private_data = fw_debug;
	116
	117	return 0;
	118	}
	119
	120	static int
	121	bnad_debugfs_open_reg(struct inode inode, struct file file)
	122	{
	123	struct bnad_debug_info *reg_debug;
	124
	125	reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	126	if (!reg_debug)
	127	return -ENOMEM;
	128
	129	reg_debug->i_private = inode->i_private;
	130
	131	file->private_data = reg_debug;
	132
	133	return 0;
	134	}
	135
	136	static int
	137	bnad_get_debug_drvinfo(struct bnad bnad, void buffer, u32 len)
	138	{
	139	struct bnad_drvinfo drvinfo = (struct bnad_drvinfo ) buffer;
	140	struct bnad_iocmd_comp fcomp;
	141	unsigned long flags = 0;
	142	int ret = BFA_STATUS_FAILED;
	143
	144	/* Get IOC info */
	145	spin_lock_irqsave(&bnad->bna_lock, flags);
	146	bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
	147	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	148
	149	/* Retrieve CEE related info */
	150	fcomp.bnad = bnad;
	151	fcomp.comp_status = 0;
	152	init_completion(&fcomp.comp);
	153	spin_lock_irqsave(&bnad->bna_lock, flags);
	154	ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
	155	bnad_cb_completion, &fcomp);
	156	if (ret != BFA_STATUS_OK) {
	157	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	158	goto out;
	159	}
	160	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	161	wait_for_completion(&fcomp.comp);
	162	drvinfo->cee_status = fcomp.comp_status;
	163
	164	/* Retrieve flash partition info */
	165	fcomp.comp_status = 0;
6e4ab361	166	reinit_completion(&fcomp.comp);
7afc5dbd KG	167	spin_lock_irqsave(&bnad->bna_lock, flags);
	168	ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
	169	bnad_cb_completion, &fcomp);
	170	if (ret != BFA_STATUS_OK) {
	171	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	172	goto out;
	173	}
	174	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	175	wait_for_completion(&fcomp.comp);
	176	drvinfo->flash_status = fcomp.comp_status;
	177	out:
	178	return ret;
	179	}
	180
	181	static int
	182	bnad_debugfs_open_drvinfo(struct inode inode, struct file file)
	183	{
	184	struct bnad *bnad = inode->i_private;
	185	struct bnad_debug_info *drv_info;
	186	int rc;
	187
	188	drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
	189	if (!drv_info)
	190	return -ENOMEM;
	191
	192	drv_info->buffer_len = sizeof(struct bnad_drvinfo);
	193
	194	drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
	195	if (!drv_info->debug_buffer) {
	196	kfree(drv_info);
	197	drv_info = NULL;
7afc5dbd KG	198	return -ENOMEM;
	199	}
	200
	201	mutex_lock(&bnad->conf_mutex);
	202	rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
	203	drv_info->buffer_len);
	204	mutex_unlock(&bnad->conf_mutex);
	205	if (rc != BFA_STATUS_OK) {
	206	kfree(drv_info->debug_buffer);
	207	drv_info->debug_buffer = NULL;
	208	kfree(drv_info);
	209	drv_info = NULL;
ecc46789	210	netdev_warn(bnad->netdev, "failed to collect drvinfo\n");
7afc5dbd KG	211	return -ENOMEM;
	212	}
	213
	214	file->private_data = drv_info;
	215
	216	return 0;
	217	}
	218
	219	/* Changes the current file position */
	220	static loff_t
	221	bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
	222	{
7afc5dbd KG	223	struct bnad_debug_info *debug = file->private_data;
	224
	225	if (!debug)
	226	return -EINVAL;
	227
c0caa07b	228	return fixed_size_llseek(file, offset, orig, debug->buffer_len);
7afc5dbd KG	229	}
	230
	231	static ssize_t
	232	bnad_debugfs_read(struct file file, char __user buf,
	233	size_t nbytes, loff_t *pos)
	234	{
	235	struct bnad_debug_info *debug = file->private_data;
	236
	237	if (!debug \|\| !debug->debug_buffer)
	238	return 0;
	239
	240	return simple_read_from_buffer(buf, nbytes, pos,
	241	debug->debug_buffer, debug->buffer_len);
	242	}
	243
	244	#define BFA_REG_CT_ADDRSZ (0x40000)
	245	#define BFA_REG_CB_ADDRSZ (0x20000)
	246	#define BFA_REG_ADDRSZ(__ioc) \
	247	((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \
	248	BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
	249	#define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1)
	250
	251	/*
	252	* Function to check if the register offset passed is valid.
	253	*/
	254	static int
	255	bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
	256	{
	257	u8 area;
	258
	259	/* check [16:15] */
	260	area = (offset >> 15) & 0x7;
	261	if (area == 0) {
	262	/* PCIe core register */
ebb56d37	263	if (offset + (len << 2) > 0x8000) /* 8k dwords or 32KB */
7afc5dbd KG	264	return BFA_STATUS_EINVAL;
	265	} else if (area == 0x1) {
	266	/* CB 32 KB memory page */
ebb56d37	267	if (offset + (len << 2) > 0x10000) /* 8k dwords or 32KB */
7afc5dbd KG	268	return BFA_STATUS_EINVAL;
	269	} else {
	270	/* CB register space 64KB */
ebb56d37	271	if (offset + (len << 2) > BFA_REG_ADDRMSK(ioc))
7afc5dbd KG	272	return BFA_STATUS_EINVAL;
	273	}
	274	return BFA_STATUS_OK;
	275	}
	276
	277	static ssize_t
	278	bnad_debugfs_read_regrd(struct file file, char __user buf,
	279	size_t nbytes, loff_t *pos)
	280	{
	281	struct bnad_debug_info *regrd_debug = file->private_data;
	282	struct bnad bnad = (struct bnad )regrd_debug->i_private;
	283	ssize_t rc;
	284
	285	if (!bnad->regdata)
	286	return 0;
	287
	288	rc = simple_read_from_buffer(buf, nbytes, pos,
	289	bnad->regdata, bnad->reglen);
	290
	291	if ((*pos + nbytes) >= bnad->reglen) {
	292	kfree(bnad->regdata);
	293	bnad->regdata = NULL;
	294	bnad->reglen = 0;
	295	}
	296
	297	return rc;
	298	}
	299
	300	static ssize_t
	301	bnad_debugfs_write_regrd(struct file file, const char __user buf,
	302	size_t nbytes, loff_t *ppos)
	303	{
	304	struct bnad_debug_info *regrd_debug = file->private_data;
	305	struct bnad bnad = (struct bnad )regrd_debug->i_private;
	306	struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
112b6b79	307	int rc, i;
112b6b79	308	u32 addr, len;
7afc5dbd KG	309	u32 *regbuf;
	310	void __iomem rb, reg_addr;
	311	unsigned long flags;
	312	void *kern_buf;
	313
d0e6a806 IV	314	/* Copy the user space buf */
	315	kern_buf = memdup_user(buf, nbytes);
	316	if (IS_ERR(kern_buf))
	317	return PTR_ERR(kern_buf);
7afc5dbd KG	318
7afc5dbd KG	319	rc = sscanf(kern_buf, "%x:%x", &addr, &len);
13e2d518	320	if (rc < 2 \|\| len > UINT_MAX >> 2) {
ecc46789	321	netdev_warn(bnad->netdev, "failed to read user buffer\n");
7afc5dbd KG	322	kfree(kern_buf);
	323	return -EINVAL;
	324	}
	325
	326	kfree(kern_buf);
	327	kfree(bnad->regdata);
7afc5dbd KG	328	bnad->reglen = 0;
	329
	330	bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
e404decb	331	if (!bnad->regdata)
7afc5dbd	332	return -ENOMEM;
7afc5dbd KG	333
	334	bnad->reglen = len << 2;
	335	rb = bfa_ioc_bar0(ioc);
	336	addr &= BFA_REG_ADDRMSK(ioc);
	337
	338	/* offset and len sanity check */
	339	rc = bna_reg_offset_check(ioc, addr, len);
	340	if (rc) {
ecc46789	341	netdev_warn(bnad->netdev, "failed reg offset check\n");
7afc5dbd KG	342	kfree(bnad->regdata);
	343	bnad->regdata = NULL;
	344	bnad->reglen = 0;
	345	return -EINVAL;
	346	}
	347
	348	reg_addr = rb + addr;
	349	regbuf = (u32 *)bnad->regdata;
	350	spin_lock_irqsave(&bnad->bna_lock, flags);
	351	for (i = 0; i < len; i++) {
	352	*regbuf = readl(reg_addr);
	353	regbuf++;
	354	reg_addr += sizeof(u32);
	355	}
	356	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	357
	358	return nbytes;
	359	}
	360
	361	static ssize_t
	362	bnad_debugfs_write_regwr(struct file file, const char __user buf,
	363	size_t nbytes, loff_t *ppos)
	364	{
	365	struct bnad_debug_info *debug = file->private_data;
	366	struct bnad bnad = (struct bnad )debug->i_private;
	367	struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
4c2e9e29	368	int rc;
4c2e9e29	369	u32 addr, val;
7afc5dbd KG	370	void __iomem *reg_addr;
	371	unsigned long flags;
	372	void *kern_buf;
	373
d0e6a806 IV	374	/* Copy the user space buf */
	375	kern_buf = memdup_user(buf, nbytes);
	376	if (IS_ERR(kern_buf))
	377	return PTR_ERR(kern_buf);
7afc5dbd KG	378
	379	rc = sscanf(kern_buf, "%x:%x", &addr, &val);
	380	if (rc < 2) {
ecc46789	381	netdev_warn(bnad->netdev, "failed to read user buffer\n");
7afc5dbd KG	382	kfree(kern_buf);
	383	return -EINVAL;
	384	}
	385	kfree(kern_buf);
	386
	387	addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */
	388
	389	/* offset and len sanity check */
	390	rc = bna_reg_offset_check(ioc, addr, 1);
	391	if (rc) {
ecc46789	392	netdev_warn(bnad->netdev, "failed reg offset check\n");
7afc5dbd KG	393	return -EINVAL;
	394	}
	395
	396	reg_addr = (bfa_ioc_bar0(ioc)) + addr;
	397	spin_lock_irqsave(&bnad->bna_lock, flags);
	398	writel(val, reg_addr);
	399	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	400
	401	return nbytes;
	402	}
	403
	404	static int
	405	bnad_debugfs_release(struct inode inode, struct file file)
	406	{
	407	struct bnad_debug_info *debug = file->private_data;
	408
	409	if (!debug)
	410	return 0;
	411
	412	file->private_data = NULL;
	413	kfree(debug);
	414	return 0;
	415	}
	416
	417	static int
	418	bnad_debugfs_buffer_release(struct inode inode, struct file file)
	419	{
	420	struct bnad_debug_info *debug = file->private_data;
	421
	422	if (!debug)
	423	return 0;
	424
	425	kfree(debug->debug_buffer);
	426
	427	file->private_data = NULL;
	428	kfree(debug);
	429	debug = NULL;
	430	return 0;
	431	}
	432
	433	static const struct file_operations bnad_debugfs_op_fwtrc = {
	434	.owner = THIS_MODULE,
	435	.open = bnad_debugfs_open_fwtrc,
	436	.llseek = bnad_debugfs_lseek,
	437	.read = bnad_debugfs_read,
	438	.release = bnad_debugfs_buffer_release,
	439	};
	440
	441	static const struct file_operations bnad_debugfs_op_fwsave = {
	442	.owner = THIS_MODULE,
	443	.open = bnad_debugfs_open_fwsave,
	444	.llseek = bnad_debugfs_lseek,
	445	.read = bnad_debugfs_read,
	446	.release = bnad_debugfs_buffer_release,
	447	};
	448
	449	static const struct file_operations bnad_debugfs_op_regrd = {
	450	.owner = THIS_MODULE,
	451	.open = bnad_debugfs_open_reg,
	452	.llseek = bnad_debugfs_lseek,
	453	.read = bnad_debugfs_read_regrd,
	454	.write = bnad_debugfs_write_regrd,
	455	.release = bnad_debugfs_release,
	456	};
457
458	static const struct file_operations bnad_debugfs_op_regwr = {
459	.owner = THIS_MODULE,
460	.open = bnad_debugfs_open_reg,
461	.llseek = bnad_debugfs_lseek,
462	.write = bnad_debugfs_write_regwr,
463	.release = bnad_debugfs_release,
464	};
465
466	static const struct file_operations bnad_debugfs_op_drvinfo = {
467	.owner = THIS_MODULE,
468	.open = bnad_debugfs_open_drvinfo,
469	.llseek = bnad_debugfs_lseek,
470	.read = bnad_debugfs_read,
471	.release = bnad_debugfs_buffer_release,
472	};
473
474	struct bnad_debugfs_entry {
475	const char *name;
88187398	476	umode_t mode;
7afc5dbd KG	477	const struct file_operations *fops;
	478	};
	479
	480	static const struct bnad_debugfs_entry bnad_debugfs_files[] = {
d3757ba4 JP	481	{ "fwtrc", S_IFREG \| 0444, &bnad_debugfs_op_fwtrc, },
	482	{ "fwsave", S_IFREG \| 0444, &bnad_debugfs_op_fwsave, },
	483	{ "regrd", S_IFREG \| 0644, &bnad_debugfs_op_regrd, },
	484	{ "regwr", S_IFREG \| 0200, &bnad_debugfs_op_regwr, },
	485	{ "drvinfo", S_IFREG \| 0444, &bnad_debugfs_op_drvinfo, },
7afc5dbd KG	486	};
	487
	488	static struct dentry *bna_debugfs_root;
	489	static atomic_t bna_debugfs_port_count;
	490
	491	/* Initialize debugfs interface for BNA */
	492	void
	493	bnad_debugfs_init(struct bnad *bnad)
	494	{
	495	const struct bnad_debugfs_entry *file;
	496	char name[64];
	497	int i;
	498
	499	/* Setup the BNA debugfs root directory*/
	500	if (!bna_debugfs_root) {
	501	bna_debugfs_root = debugfs_create_dir("bna", NULL);
	502	atomic_set(&bna_debugfs_port_count, 0);
	503	if (!bna_debugfs_root) {
ecc46789 IV	504	netdev_warn(bnad->netdev,
ecc46789 IV	505	"debugfs root dir creation failed\n");
7afc5dbd KG	506	return;
	507	}
	508	}
	509
	510	/* Setup the pci_dev debugfs directory for the port */
	511	snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev));
	512	if (!bnad->port_debugfs_root) {
	513	bnad->port_debugfs_root =
	514	debugfs_create_dir(name, bna_debugfs_root);
	515	if (!bnad->port_debugfs_root) {
ecc46789 IV	516	netdev_warn(bnad->netdev,
ecc46789 IV	517	"debugfs root dir creation failed\n");
7afc5dbd KG	518	return;
	519	}
	520
	521	atomic_inc(&bna_debugfs_port_count);
	522
	523	for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
	524	file = &bnad_debugfs_files[i];
	525	bnad->bnad_dentry_files[i] =
	526	debugfs_create_file(file->name,
	527	file->mode,
	528	bnad->port_debugfs_root,
	529	bnad,
	530	file->fops);
	531	if (!bnad->bnad_dentry_files[i]) {
ecc46789 IV	532	netdev_warn(bnad->netdev,
	533	"create %s entry failed\n",
	534	file->name);
7afc5dbd KG	535	return;
	536	}
	537	}
	538	}
	539	}
	540
	541	/* Uninitialize debugfs interface for BNA */
	542	void
	543	bnad_debugfs_uninit(struct bnad *bnad)
	544	{
	545	int i;
	546
	547	for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
	548	if (bnad->bnad_dentry_files[i]) {
	549	debugfs_remove(bnad->bnad_dentry_files[i]);
	550	bnad->bnad_dentry_files[i] = NULL;
	551	}
	552	}
	553
	554	/* Remove the pci_dev debugfs directory for the port */
	555	if (bnad->port_debugfs_root) {
	556	debugfs_remove(bnad->port_debugfs_root);
	557	bnad->port_debugfs_root = NULL;
	558	atomic_dec(&bna_debugfs_port_count);
	559	}
	560
	561	/* Remove the BNA debugfs root directory */
	562	if (atomic_read(&bna_debugfs_port_count) == 0) {
	563	debugfs_remove(bna_debugfs_root);
	564	bna_debugfs_root = NULL;
	565	}
	566	}