Lendacky, Thomas | c5aa9e3 | 2014-06-05 09:15:06 -0500 | [diff] [blame] | 1 | /* |
| 2 | * AMD 10Gb Ethernet driver |
| 3 | * |
| 4 | * This file is available to you under your choice of the following two |
| 5 | * licenses: |
| 6 | * |
| 7 | * License 1: GPLv2 |
| 8 | * |
| 9 | * Copyright (c) 2014 Advanced Micro Devices, Inc. |
| 10 | * |
| 11 | * This file is free software; you may copy, redistribute and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation, either version 2 of the License, or (at |
| 14 | * your option) any later version. |
| 15 | * |
| 16 | * This file is distributed in the hope that it will be useful, but |
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 23 | * |
| 24 | * This file incorporates work covered by the following copyright and |
| 25 | * permission notice: |
| 26 | * The Synopsys DWC ETHER XGMAC Software Driver and documentation |
| 27 | * (hereinafter "Software") is an unsupported proprietary work of Synopsys, |
| 28 | * Inc. unless otherwise expressly agreed to in writing between Synopsys |
| 29 | * and you. |
| 30 | * |
| 31 | * The Software IS NOT an item of Licensed Software or Licensed Product |
| 32 | * under any End User Software License Agreement or Agreement for Licensed |
| 33 | * Product with Synopsys or any supplement thereto. Permission is hereby |
| 34 | * granted, free of charge, to any person obtaining a copy of this software |
| 35 | * annotated with this license and the Software, to deal in the Software |
| 36 | * without restriction, including without limitation the rights to use, |
| 37 | * copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
| 38 | * of the Software, and to permit persons to whom the Software is furnished |
| 39 | * to do so, subject to the following conditions: |
| 40 | * |
| 41 | * The above copyright notice and this permission notice shall be included |
| 42 | * in all copies or substantial portions of the Software. |
| 43 | * |
| 44 | * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" |
| 45 | * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 46 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| 47 | * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS |
| 48 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 49 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 50 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 51 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 52 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 53 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 54 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 55 | * |
| 56 | * |
| 57 | * License 2: Modified BSD |
| 58 | * |
| 59 | * Copyright (c) 2014 Advanced Micro Devices, Inc. |
| 60 | * All rights reserved. |
| 61 | * |
| 62 | * Redistribution and use in source and binary forms, with or without |
| 63 | * modification, are permitted provided that the following conditions are met: |
| 64 | * * Redistributions of source code must retain the above copyright |
| 65 | * notice, this list of conditions and the following disclaimer. |
| 66 | * * Redistributions in binary form must reproduce the above copyright |
| 67 | * notice, this list of conditions and the following disclaimer in the |
| 68 | * documentation and/or other materials provided with the distribution. |
| 69 | * * Neither the name of Advanced Micro Devices, Inc. nor the |
| 70 | * names of its contributors may be used to endorse or promote products |
| 71 | * derived from this software without specific prior written permission. |
| 72 | * |
| 73 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 74 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 75 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 76 | * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY |
| 77 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 78 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 79 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 80 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 81 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 82 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 83 | * |
| 84 | * This file incorporates work covered by the following copyright and |
| 85 | * permission notice: |
| 86 | * The Synopsys DWC ETHER XGMAC Software Driver and documentation |
| 87 | * (hereinafter "Software") is an unsupported proprietary work of Synopsys, |
| 88 | * Inc. unless otherwise expressly agreed to in writing between Synopsys |
| 89 | * and you. |
| 90 | * |
| 91 | * The Software IS NOT an item of Licensed Software or Licensed Product |
| 92 | * under any End User Software License Agreement or Agreement for Licensed |
| 93 | * Product with Synopsys or any supplement thereto. Permission is hereby |
| 94 | * granted, free of charge, to any person obtaining a copy of this software |
| 95 | * annotated with this license and the Software, to deal in the Software |
| 96 | * without restriction, including without limitation the rights to use, |
| 97 | * copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
| 98 | * of the Software, and to permit persons to whom the Software is furnished |
| 99 | * to do so, subject to the following conditions: |
| 100 | * |
| 101 | * The above copyright notice and this permission notice shall be included |
| 102 | * in all copies or substantial portions of the Software. |
| 103 | * |
| 104 | * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" |
| 105 | * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 106 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| 107 | * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS |
| 108 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 109 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 110 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 111 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 112 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 113 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 114 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 115 | */ |
| 116 | |
| 117 | #include <linux/debugfs.h> |
| 118 | #include <linux/module.h> |
| 119 | #include <linux/slab.h> |
| 120 | |
| 121 | #include "xgbe.h" |
| 122 | #include "xgbe-common.h" |
| 123 | |
| 124 | |
| 125 | static ssize_t xgbe_common_read(char __user *buffer, size_t count, |
| 126 | loff_t *ppos, unsigned int value) |
| 127 | { |
| 128 | char *buf; |
| 129 | ssize_t len; |
| 130 | |
| 131 | if (*ppos != 0) |
| 132 | return 0; |
| 133 | |
| 134 | buf = kasprintf(GFP_KERNEL, "0x%08x\n", value); |
| 135 | if (!buf) |
| 136 | return -ENOMEM; |
| 137 | |
| 138 | if (count < strlen(buf)) { |
| 139 | kfree(buf); |
| 140 | return -ENOSPC; |
| 141 | } |
| 142 | |
| 143 | len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf)); |
| 144 | kfree(buf); |
| 145 | |
| 146 | return len; |
| 147 | } |
| 148 | |
| 149 | static ssize_t xgbe_common_write(const char __user *buffer, size_t count, |
| 150 | loff_t *ppos, unsigned int *value) |
| 151 | { |
| 152 | char workarea[32]; |
| 153 | ssize_t len; |
Lendacky, Thomas | 66f95c3 | 2014-06-24 16:19:35 -0500 | [diff] [blame] | 154 | int ret; |
Lendacky, Thomas | c5aa9e3 | 2014-06-05 09:15:06 -0500 | [diff] [blame] | 155 | |
| 156 | if (*ppos != 0) |
| 157 | return 0; |
| 158 | |
| 159 | if (count >= sizeof(workarea)) |
| 160 | return -ENOSPC; |
| 161 | |
| 162 | len = simple_write_to_buffer(workarea, sizeof(workarea) - 1, ppos, |
| 163 | buffer, count); |
| 164 | if (len < 0) |
| 165 | return len; |
| 166 | |
| 167 | workarea[len] = '\0'; |
Lendacky, Thomas | f3f128d | 2014-07-02 13:04:28 -0500 | [diff] [blame] | 168 | ret = kstrtouint(workarea, 16, value); |
Lendacky, Thomas | 66f95c3 | 2014-06-24 16:19:35 -0500 | [diff] [blame] | 169 | if (ret) |
Lendacky, Thomas | f3f128d | 2014-07-02 13:04:28 -0500 | [diff] [blame] | 170 | return -EIO; |
Lendacky, Thomas | c5aa9e3 | 2014-06-05 09:15:06 -0500 | [diff] [blame] | 171 | |
| 172 | return len; |
| 173 | } |
| 174 | |
| 175 | static ssize_t xgmac_reg_addr_read(struct file *filp, char __user *buffer, |
| 176 | size_t count, loff_t *ppos) |
| 177 | { |
| 178 | struct xgbe_prv_data *pdata = filp->private_data; |
| 179 | |
| 180 | return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xgmac_reg); |
| 181 | } |
| 182 | |
| 183 | static ssize_t xgmac_reg_addr_write(struct file *filp, |
| 184 | const char __user *buffer, |
| 185 | size_t count, loff_t *ppos) |
| 186 | { |
| 187 | struct xgbe_prv_data *pdata = filp->private_data; |
| 188 | |
| 189 | return xgbe_common_write(buffer, count, ppos, |
| 190 | &pdata->debugfs_xgmac_reg); |
| 191 | } |
| 192 | |
| 193 | static ssize_t xgmac_reg_value_read(struct file *filp, char __user *buffer, |
| 194 | size_t count, loff_t *ppos) |
| 195 | { |
| 196 | struct xgbe_prv_data *pdata = filp->private_data; |
| 197 | unsigned int value; |
| 198 | |
| 199 | value = XGMAC_IOREAD(pdata, pdata->debugfs_xgmac_reg); |
| 200 | |
| 201 | return xgbe_common_read(buffer, count, ppos, value); |
| 202 | } |
| 203 | |
| 204 | static ssize_t xgmac_reg_value_write(struct file *filp, |
| 205 | const char __user *buffer, |
| 206 | size_t count, loff_t *ppos) |
| 207 | { |
| 208 | struct xgbe_prv_data *pdata = filp->private_data; |
| 209 | unsigned int value; |
| 210 | ssize_t len; |
| 211 | |
| 212 | len = xgbe_common_write(buffer, count, ppos, &value); |
| 213 | if (len < 0) |
| 214 | return len; |
| 215 | |
| 216 | XGMAC_IOWRITE(pdata, pdata->debugfs_xgmac_reg, value); |
| 217 | |
| 218 | return len; |
| 219 | } |
| 220 | |
| 221 | static const struct file_operations xgmac_reg_addr_fops = { |
| 222 | .owner = THIS_MODULE, |
| 223 | .open = simple_open, |
| 224 | .read = xgmac_reg_addr_read, |
| 225 | .write = xgmac_reg_addr_write, |
| 226 | }; |
| 227 | |
| 228 | static const struct file_operations xgmac_reg_value_fops = { |
| 229 | .owner = THIS_MODULE, |
| 230 | .open = simple_open, |
| 231 | .read = xgmac_reg_value_read, |
| 232 | .write = xgmac_reg_value_write, |
| 233 | }; |
| 234 | |
| 235 | static ssize_t xpcs_mmd_read(struct file *filp, char __user *buffer, |
| 236 | size_t count, loff_t *ppos) |
| 237 | { |
| 238 | struct xgbe_prv_data *pdata = filp->private_data; |
| 239 | |
| 240 | return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_mmd); |
| 241 | } |
| 242 | |
| 243 | static ssize_t xpcs_mmd_write(struct file *filp, const char __user *buffer, |
| 244 | size_t count, loff_t *ppos) |
| 245 | { |
| 246 | struct xgbe_prv_data *pdata = filp->private_data; |
| 247 | |
| 248 | return xgbe_common_write(buffer, count, ppos, |
| 249 | &pdata->debugfs_xpcs_mmd); |
| 250 | } |
| 251 | |
| 252 | static ssize_t xpcs_reg_addr_read(struct file *filp, char __user *buffer, |
| 253 | size_t count, loff_t *ppos) |
| 254 | { |
| 255 | struct xgbe_prv_data *pdata = filp->private_data; |
| 256 | |
| 257 | return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_reg); |
| 258 | } |
| 259 | |
| 260 | static ssize_t xpcs_reg_addr_write(struct file *filp, const char __user *buffer, |
| 261 | size_t count, loff_t *ppos) |
| 262 | { |
| 263 | struct xgbe_prv_data *pdata = filp->private_data; |
| 264 | |
| 265 | return xgbe_common_write(buffer, count, ppos, |
| 266 | &pdata->debugfs_xpcs_reg); |
| 267 | } |
| 268 | |
| 269 | static ssize_t xpcs_reg_value_read(struct file *filp, char __user *buffer, |
| 270 | size_t count, loff_t *ppos) |
| 271 | { |
| 272 | struct xgbe_prv_data *pdata = filp->private_data; |
| 273 | unsigned int value; |
| 274 | |
| 275 | value = pdata->hw_if.read_mmd_regs(pdata, pdata->debugfs_xpcs_mmd, |
| 276 | pdata->debugfs_xpcs_reg); |
| 277 | |
| 278 | return xgbe_common_read(buffer, count, ppos, value); |
| 279 | } |
| 280 | |
| 281 | static ssize_t xpcs_reg_value_write(struct file *filp, |
| 282 | const char __user *buffer, |
| 283 | size_t count, loff_t *ppos) |
| 284 | { |
| 285 | struct xgbe_prv_data *pdata = filp->private_data; |
| 286 | unsigned int value; |
| 287 | ssize_t len; |
| 288 | |
| 289 | len = xgbe_common_write(buffer, count, ppos, &value); |
| 290 | if (len < 0) |
| 291 | return len; |
| 292 | |
| 293 | pdata->hw_if.write_mmd_regs(pdata, pdata->debugfs_xpcs_mmd, |
| 294 | pdata->debugfs_xpcs_reg, value); |
| 295 | |
| 296 | return len; |
| 297 | } |
| 298 | |
| 299 | static const struct file_operations xpcs_mmd_fops = { |
| 300 | .owner = THIS_MODULE, |
| 301 | .open = simple_open, |
| 302 | .read = xpcs_mmd_read, |
| 303 | .write = xpcs_mmd_write, |
| 304 | }; |
| 305 | |
| 306 | static const struct file_operations xpcs_reg_addr_fops = { |
| 307 | .owner = THIS_MODULE, |
| 308 | .open = simple_open, |
| 309 | .read = xpcs_reg_addr_read, |
| 310 | .write = xpcs_reg_addr_write, |
| 311 | }; |
| 312 | |
| 313 | static const struct file_operations xpcs_reg_value_fops = { |
| 314 | .owner = THIS_MODULE, |
| 315 | .open = simple_open, |
| 316 | .read = xpcs_reg_value_read, |
| 317 | .write = xpcs_reg_value_write, |
| 318 | }; |
| 319 | |
| 320 | void xgbe_debugfs_init(struct xgbe_prv_data *pdata) |
| 321 | { |
| 322 | struct dentry *pfile; |
| 323 | char *buf; |
| 324 | |
| 325 | /* Set defaults */ |
| 326 | pdata->debugfs_xgmac_reg = 0; |
| 327 | pdata->debugfs_xpcs_mmd = 1; |
| 328 | pdata->debugfs_xpcs_reg = 0; |
| 329 | |
| 330 | buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name); |
| 331 | pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL); |
| 332 | if (pdata->xgbe_debugfs == NULL) { |
| 333 | netdev_err(pdata->netdev, "debugfs_create_dir failed\n"); |
| 334 | return; |
| 335 | } |
| 336 | |
| 337 | pfile = debugfs_create_file("xgmac_register", 0600, |
| 338 | pdata->xgbe_debugfs, pdata, |
| 339 | &xgmac_reg_addr_fops); |
| 340 | if (!pfile) |
| 341 | netdev_err(pdata->netdev, "debugfs_create_file failed\n"); |
| 342 | |
| 343 | pfile = debugfs_create_file("xgmac_register_value", 0600, |
| 344 | pdata->xgbe_debugfs, pdata, |
| 345 | &xgmac_reg_value_fops); |
| 346 | if (!pfile) |
| 347 | netdev_err(pdata->netdev, "debugfs_create_file failed\n"); |
| 348 | |
| 349 | pfile = debugfs_create_file("xpcs_mmd", 0600, |
| 350 | pdata->xgbe_debugfs, pdata, |
| 351 | &xpcs_mmd_fops); |
| 352 | if (!pfile) |
| 353 | netdev_err(pdata->netdev, "debugfs_create_file failed\n"); |
| 354 | |
| 355 | pfile = debugfs_create_file("xpcs_register", 0600, |
| 356 | pdata->xgbe_debugfs, pdata, |
| 357 | &xpcs_reg_addr_fops); |
| 358 | if (!pfile) |
| 359 | netdev_err(pdata->netdev, "debugfs_create_file failed\n"); |
| 360 | |
| 361 | pfile = debugfs_create_file("xpcs_register_value", 0600, |
| 362 | pdata->xgbe_debugfs, pdata, |
| 363 | &xpcs_reg_value_fops); |
| 364 | if (!pfile) |
| 365 | netdev_err(pdata->netdev, "debugfs_create_file failed\n"); |
| 366 | |
| 367 | kfree(buf); |
| 368 | } |
| 369 | |
| 370 | void xgbe_debugfs_exit(struct xgbe_prv_data *pdata) |
| 371 | { |
| 372 | debugfs_remove_recursive(pdata->xgbe_debugfs); |
| 373 | pdata->xgbe_debugfs = NULL; |
| 374 | } |