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1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 1999 - 2018 Intel Corporation. */3 4#include <linux/debugfs.h>5#include <linux/module.h>6 7#include "ixgbe.h"8 9static struct dentry *ixgbe_dbg_root;10 11static char ixgbe_dbg_reg_ops_buf[256] = "";12 13static ssize_t ixgbe_dbg_common_ops_read(struct file *filp, char __user *buffer,14 size_t count, loff_t *ppos,15 char *dbg_buf)16{17 struct ixgbe_adapter *adapter = filp->private_data;18 char *buf;19 int len;20 21 /* don't allow partial reads */22 if (*ppos != 0)23 return 0;24 25 buf = kasprintf(GFP_KERNEL, "%s: %s\n",26 adapter->netdev->name, dbg_buf);27 if (!buf)28 return -ENOMEM;29 30 if (count < strlen(buf)) {31 kfree(buf);32 return -ENOSPC;33 }34 35 len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));36 37 kfree(buf);38 return len;39}40 41/**42 * ixgbe_dbg_reg_ops_read - read for reg_ops datum43 * @filp: the opened file44 * @buffer: where to write the data for the user to read45 * @count: the size of the user's buffer46 * @ppos: file position offset47 **/48static ssize_t ixgbe_dbg_reg_ops_read(struct file *filp, char __user *buffer,49 size_t count, loff_t *ppos)50{51 return ixgbe_dbg_common_ops_read(filp, buffer, count, ppos,52 ixgbe_dbg_reg_ops_buf);53}54 55/**56 * ixgbe_dbg_reg_ops_write - write into reg_ops datum57 * @filp: the opened file58 * @buffer: where to find the user's data59 * @count: the length of the user's data60 * @ppos: file position offset61 **/62static ssize_t ixgbe_dbg_reg_ops_write(struct file *filp,63 const char __user *buffer,64 size_t count, loff_t *ppos)65{66 struct ixgbe_adapter *adapter = filp->private_data;67 int len;68 69 /* don't allow partial writes */70 if (*ppos != 0)71 return 0;72 if (count >= sizeof(ixgbe_dbg_reg_ops_buf))73 return -ENOSPC;74 75 len = simple_write_to_buffer(ixgbe_dbg_reg_ops_buf,76 sizeof(ixgbe_dbg_reg_ops_buf)-1,77 ppos,78 buffer,79 count);80 if (len < 0)81 return len;82 83 ixgbe_dbg_reg_ops_buf[len] = '\0';84 85 if (strncmp(ixgbe_dbg_reg_ops_buf, "write", 5) == 0) {86 u32 reg, value;87 int cnt;88 cnt = sscanf(&ixgbe_dbg_reg_ops_buf[5], "%x %x", ®, &value);89 if (cnt == 2) {90 IXGBE_WRITE_REG(&adapter->hw, reg, value);91 value = IXGBE_READ_REG(&adapter->hw, reg);92 e_dev_info("write: 0x%08x = 0x%08x\n", reg, value);93 } else {94 e_dev_info("write <reg> <value>\n");95 }96 } else if (strncmp(ixgbe_dbg_reg_ops_buf, "read", 4) == 0) {97 u32 reg, value;98 int cnt;99 cnt = sscanf(&ixgbe_dbg_reg_ops_buf[4], "%x", ®);100 if (cnt == 1) {101 value = IXGBE_READ_REG(&adapter->hw, reg);102 e_dev_info("read 0x%08x = 0x%08x\n", reg, value);103 } else {104 e_dev_info("read <reg>\n");105 }106 } else {107 e_dev_info("Unknown command %s\n", ixgbe_dbg_reg_ops_buf);108 e_dev_info("Available commands:\n");109 e_dev_info(" read <reg>\n");110 e_dev_info(" write <reg> <value>\n");111 }112 return count;113}114 115static const struct file_operations ixgbe_dbg_reg_ops_fops = {116 .owner = THIS_MODULE,117 .open = simple_open,118 .read = ixgbe_dbg_reg_ops_read,119 .write = ixgbe_dbg_reg_ops_write,120};121 122static char ixgbe_dbg_netdev_ops_buf[256] = "";123 124/**125 * ixgbe_dbg_netdev_ops_read - read for netdev_ops datum126 * @filp: the opened file127 * @buffer: where to write the data for the user to read128 * @count: the size of the user's buffer129 * @ppos: file position offset130 **/131static ssize_t ixgbe_dbg_netdev_ops_read(struct file *filp, char __user *buffer,132 size_t count, loff_t *ppos)133{134 return ixgbe_dbg_common_ops_read(filp, buffer, count, ppos,135 ixgbe_dbg_netdev_ops_buf);136}137 138/**139 * ixgbe_dbg_netdev_ops_write - write into netdev_ops datum140 * @filp: the opened file141 * @buffer: where to find the user's data142 * @count: the length of the user's data143 * @ppos: file position offset144 **/145static ssize_t ixgbe_dbg_netdev_ops_write(struct file *filp,146 const char __user *buffer,147 size_t count, loff_t *ppos)148{149 struct ixgbe_adapter *adapter = filp->private_data;150 int len;151 152 /* don't allow partial writes */153 if (*ppos != 0)154 return 0;155 if (count >= sizeof(ixgbe_dbg_netdev_ops_buf))156 return -ENOSPC;157 158 len = simple_write_to_buffer(ixgbe_dbg_netdev_ops_buf,159 sizeof(ixgbe_dbg_netdev_ops_buf)-1,160 ppos,161 buffer,162 count);163 if (len < 0)164 return len;165 166 ixgbe_dbg_netdev_ops_buf[len] = '\0';167 168 if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {169 /* TX Queue number below is wrong, but ixgbe does not use it */170 adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev,171 UINT_MAX);172 e_dev_info("tx_timeout called\n");173 } else {174 e_dev_info("Unknown command: %s\n", ixgbe_dbg_netdev_ops_buf);175 e_dev_info("Available commands:\n");176 e_dev_info(" tx_timeout\n");177 }178 return count;179}180 181static const struct file_operations ixgbe_dbg_netdev_ops_fops = {182 .owner = THIS_MODULE,183 .open = simple_open,184 .read = ixgbe_dbg_netdev_ops_read,185 .write = ixgbe_dbg_netdev_ops_write,186};187 188/**189 * ixgbe_dbg_adapter_init - setup the debugfs directory for the adapter190 * @adapter: the adapter that is starting up191 **/192void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter)193{194 const char *name = pci_name(adapter->pdev);195 196 adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);197 debugfs_create_file("reg_ops", 0600, adapter->ixgbe_dbg_adapter,198 adapter, &ixgbe_dbg_reg_ops_fops);199 debugfs_create_file("netdev_ops", 0600, adapter->ixgbe_dbg_adapter,200 adapter, &ixgbe_dbg_netdev_ops_fops);201}202 203/**204 * ixgbe_dbg_adapter_exit - clear out the adapter's debugfs entries205 * @adapter: the adapter that is exiting206 **/207void ixgbe_dbg_adapter_exit(struct ixgbe_adapter *adapter)208{209 debugfs_remove_recursive(adapter->ixgbe_dbg_adapter);210 adapter->ixgbe_dbg_adapter = NULL;211}212 213/**214 * ixgbe_dbg_init - start up debugfs for the driver215 **/216void ixgbe_dbg_init(void)217{218 ixgbe_dbg_root = debugfs_create_dir(ixgbe_driver_name, NULL);219}220 221/**222 * ixgbe_dbg_exit - clean out the driver's debugfs entries223 **/224void ixgbe_dbg_exit(void)225{226 debugfs_remove_recursive(ixgbe_dbg_root);227}228