blob: 97291bfbeea589e8ca8ab637db8bcff7e573322f [file] [log] [blame]
// 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_nul(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_nul(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);
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;
}
}