1 /* 2 ******************************************************************************* 3 ** O.S : Linux 4 ** FILE NAME : arcmsr_attr.c 5 ** BY : Erich Chen 6 ** Description: attributes exported to sysfs and device host 7 ******************************************************************************* 8 ** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved 9 ** 10 ** Web site: www.areca.com.tw 11 ** E-mail: erich@areca.com.tw 12 ** 13 ** This program is free software; you can redistribute it and/or modify 14 ** it under the terms of the GNU General Public License version 2 as 15 ** published by the Free Software Foundation. 16 ** This program is distributed in the hope that it will be useful, 17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 ** GNU General Public License for more details. 20 ******************************************************************************* 21 ** Redistribution and use in source and binary forms, with or without 22 ** modification, are permitted provided that the following conditions 23 ** are met: 24 ** 1. Redistributions of source code must retain the above copyright 25 ** notice, this list of conditions and the following disclaimer. 26 ** 2. Redistributions in binary form must reproduce the above copyright 27 ** notice, this list of conditions and the following disclaimer in the 28 ** documentation and/or other materials provided with the distribution. 29 ** 3. The name of the author may not be used to endorse or promote products 30 ** derived from this software without specific prior written permission. 31 ** 32 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 33 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 34 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 35 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 36 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT 37 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 38 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY 39 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 40 ** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF 41 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 ******************************************************************************* 43 ** For history of changes, see Documentation/scsi/ChangeLog.arcmsr 44 ** Firmware Specification, see Documentation/scsi/arcmsr_spec.txt 45 ******************************************************************************* 46 */ 47 #include <linux/module.h> 48 #include <linux/kernel.h> 49 #include <linux/init.h> 50 #include <linux/errno.h> 51 #include <linux/delay.h> 52 53 #include <scsi/scsi_cmnd.h> 54 #include <scsi/scsi_device.h> 55 #include <scsi/scsi_host.h> 56 #include <scsi/scsi_transport.h> 57 #include "arcmsr.h" 58 59 struct class_device_attribute *arcmsr_host_attrs[]; 60 61 static ssize_t 62 arcmsr_sysfs_iop_message_read(struct kobject *kobj, 63 struct bin_attribute *bin_attr, 64 char *buf, loff_t off, size_t count) 65 { 66 struct class_device *cdev = container_of(kobj,struct class_device,kobj); 67 struct Scsi_Host *host = class_to_shost(cdev); 68 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 69 struct MessageUnit __iomem *reg = acb->pmu; 70 uint8_t *pQbuffer,*ptmpQbuffer; 71 int32_t allxfer_len = 0; 72 73 if (!capable(CAP_SYS_ADMIN)) 74 return -EACCES; 75 76 /* do message unit read. */ 77 ptmpQbuffer = (uint8_t *)buf; 78 while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex) 79 && (allxfer_len < 1031)) { 80 pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex]; 81 memcpy(ptmpQbuffer, pQbuffer, 1); 82 acb->rqbuf_firstindex++; 83 acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER; 84 ptmpQbuffer++; 85 allxfer_len++; 86 } 87 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) { 88 struct QBUFFER __iomem * prbuffer = (struct QBUFFER __iomem *) 89 ®->message_rbuffer; 90 uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data; 91 int32_t iop_len; 92 93 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW; 94 iop_len = readl(&prbuffer->data_len); 95 while (iop_len > 0) { 96 acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data); 97 acb->rqbuf_lastindex++; 98 acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER; 99 iop_data++; 100 iop_len--; 101 } 102 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, 103 ®->inbound_doorbell); 104 } 105 return (allxfer_len); 106 } 107 108 static ssize_t 109 arcmsr_sysfs_iop_message_write(struct kobject *kobj, 110 struct bin_attribute *bin_attr, 111 char *buf, loff_t off, size_t count) 112 { 113 struct class_device *cdev = container_of(kobj,struct class_device,kobj); 114 struct Scsi_Host *host = class_to_shost(cdev); 115 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 116 int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex; 117 uint8_t *pQbuffer, *ptmpuserbuffer; 118 119 if (!capable(CAP_SYS_ADMIN)) 120 return -EACCES; 121 if (count > 1032) 122 return -EINVAL; 123 /* do message unit write. */ 124 ptmpuserbuffer = (uint8_t *)buf; 125 user_len = (int32_t)count; 126 wqbuf_lastindex = acb->wqbuf_lastindex; 127 wqbuf_firstindex = acb->wqbuf_firstindex; 128 if (wqbuf_lastindex != wqbuf_firstindex) { 129 arcmsr_post_Qbuffer(acb); 130 return 0; /*need retry*/ 131 } else { 132 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1) 133 &(ARCMSR_MAX_QBUFFER - 1); 134 if (my_empty_len >= user_len) { 135 while (user_len > 0) { 136 pQbuffer = 137 &acb->wqbuffer[acb->wqbuf_lastindex]; 138 memcpy(pQbuffer, ptmpuserbuffer, 1); 139 acb->wqbuf_lastindex++; 140 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER; 141 ptmpuserbuffer++; 142 user_len--; 143 } 144 if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) { 145 acb->acb_flags &= 146 ~ACB_F_MESSAGE_WQBUFFER_CLEARED; 147 arcmsr_post_Qbuffer(acb); 148 } 149 return count; 150 } else { 151 return 0; /*need retry*/ 152 } 153 } 154 } 155 156 static ssize_t 157 arcmsr_sysfs_iop_message_clear(struct kobject *kobj, 158 struct bin_attribute *bin_attr, 159 char *buf, loff_t off, size_t count) 160 { 161 struct class_device *cdev = container_of(kobj,struct class_device,kobj); 162 struct Scsi_Host *host = class_to_shost(cdev); 163 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 164 struct MessageUnit __iomem *reg = acb->pmu; 165 uint8_t *pQbuffer; 166 167 if (!capable(CAP_SYS_ADMIN)) 168 return -EACCES; 169 170 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) { 171 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW; 172 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK 173 , ®->inbound_doorbell); 174 } 175 acb->acb_flags |= 176 (ACB_F_MESSAGE_WQBUFFER_CLEARED 177 | ACB_F_MESSAGE_RQBUFFER_CLEARED 178 | ACB_F_MESSAGE_WQBUFFER_READED); 179 acb->rqbuf_firstindex = 0; 180 acb->rqbuf_lastindex = 0; 181 acb->wqbuf_firstindex = 0; 182 acb->wqbuf_lastindex = 0; 183 pQbuffer = acb->rqbuffer; 184 memset(pQbuffer, 0, sizeof (struct QBUFFER)); 185 pQbuffer = acb->wqbuffer; 186 memset(pQbuffer, 0, sizeof (struct QBUFFER)); 187 return 1; 188 } 189 190 static struct bin_attribute arcmsr_sysfs_message_read_attr = { 191 .attr = { 192 .name = "mu_read", 193 .mode = S_IRUSR , 194 }, 195 .size = 1032, 196 .read = arcmsr_sysfs_iop_message_read, 197 }; 198 199 static struct bin_attribute arcmsr_sysfs_message_write_attr = { 200 .attr = { 201 .name = "mu_write", 202 .mode = S_IWUSR, 203 }, 204 .size = 1032, 205 .write = arcmsr_sysfs_iop_message_write, 206 }; 207 208 static struct bin_attribute arcmsr_sysfs_message_clear_attr = { 209 .attr = { 210 .name = "mu_clear", 211 .mode = S_IWUSR, 212 }, 213 .size = 1, 214 .write = arcmsr_sysfs_iop_message_clear, 215 }; 216 217 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb) 218 { 219 struct Scsi_Host *host = acb->host; 220 int error; 221 222 error = sysfs_create_bin_file(&host->shost_classdev.kobj, 223 &arcmsr_sysfs_message_read_attr); 224 if (error) { 225 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n"); 226 goto error_bin_file_message_read; 227 } 228 error = sysfs_create_bin_file(&host->shost_classdev.kobj, 229 &arcmsr_sysfs_message_write_attr); 230 if (error) { 231 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n"); 232 goto error_bin_file_message_write; 233 } 234 error = sysfs_create_bin_file(&host->shost_classdev.kobj, 235 &arcmsr_sysfs_message_clear_attr); 236 if (error) { 237 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n"); 238 goto error_bin_file_message_clear; 239 } 240 return 0; 241 error_bin_file_message_clear: 242 sysfs_remove_bin_file(&host->shost_classdev.kobj, 243 &arcmsr_sysfs_message_write_attr); 244 error_bin_file_message_write: 245 sysfs_remove_bin_file(&host->shost_classdev.kobj, 246 &arcmsr_sysfs_message_read_attr); 247 error_bin_file_message_read: 248 return error; 249 } 250 251 void 252 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) { 253 struct Scsi_Host *host = acb->host; 254 255 sysfs_remove_bin_file(&host->shost_classdev.kobj, 256 &arcmsr_sysfs_message_clear_attr); 257 sysfs_remove_bin_file(&host->shost_classdev.kobj, 258 &arcmsr_sysfs_message_write_attr); 259 sysfs_remove_bin_file(&host->shost_classdev.kobj, 260 &arcmsr_sysfs_message_read_attr); 261 } 262 263 264 static ssize_t 265 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) { 266 return snprintf(buf, PAGE_SIZE, 267 "%s\n", 268 ARCMSR_DRIVER_VERSION); 269 } 270 271 static ssize_t 272 arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) { 273 struct Scsi_Host *host = class_to_shost(cdev); 274 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 275 return snprintf(buf, PAGE_SIZE, 276 "%4d\n", 277 atomic_read(&acb->ccboutstandingcount)); 278 } 279 280 static ssize_t 281 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) { 282 struct Scsi_Host *host = class_to_shost(cdev); 283 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 284 return snprintf(buf, PAGE_SIZE, 285 "%4d\n", 286 acb->num_resets); 287 } 288 289 static ssize_t 290 arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) { 291 struct Scsi_Host *host = class_to_shost(cdev); 292 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 293 return snprintf(buf, PAGE_SIZE, 294 "%4d\n", 295 acb->num_aborts); 296 } 297 298 static ssize_t 299 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) { 300 struct Scsi_Host *host = class_to_shost(cdev); 301 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 302 return snprintf(buf, PAGE_SIZE, 303 "%s\n", 304 acb->firm_model); 305 } 306 307 static ssize_t 308 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) { 309 struct Scsi_Host *host = class_to_shost(cdev); 310 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 311 312 return snprintf(buf, PAGE_SIZE, 313 "%s\n", 314 acb->firm_version); 315 } 316 317 static ssize_t 318 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) { 319 struct Scsi_Host *host = class_to_shost(cdev); 320 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 321 322 return snprintf(buf, PAGE_SIZE, 323 "%4d\n", 324 acb->firm_request_len); 325 } 326 327 static ssize_t 328 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) { 329 struct Scsi_Host *host = class_to_shost(cdev); 330 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 331 332 return snprintf(buf, PAGE_SIZE, 333 "%4d\n", 334 acb->firm_numbers_queue); 335 } 336 337 static ssize_t 338 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) { 339 struct Scsi_Host *host = class_to_shost(cdev); 340 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 341 342 return snprintf(buf, PAGE_SIZE, 343 "%4d\n", 344 acb->firm_sdram_size); 345 } 346 347 static ssize_t 348 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) { 349 struct Scsi_Host *host = class_to_shost(cdev); 350 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 351 352 return snprintf(buf, PAGE_SIZE, 353 "%4d\n", 354 acb->firm_hd_channels); 355 } 356 357 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL); 358 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL); 359 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL); 360 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL); 361 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL); 362 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL); 363 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL); 364 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL); 365 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL); 366 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL); 367 368 struct class_device_attribute *arcmsr_host_attrs[] = { 369 &class_device_attr_host_driver_version, 370 &class_device_attr_host_driver_posted_cmd, 371 &class_device_attr_host_driver_reset, 372 &class_device_attr_host_driver_abort, 373 &class_device_attr_host_fw_model, 374 &class_device_attr_host_fw_version, 375 &class_device_attr_host_fw_request_len, 376 &class_device_attr_host_fw_numbers_queue, 377 &class_device_attr_host_fw_sdram_size, 378 &class_device_attr_host_fw_hd_channels, 379 NULL, 380 }; 381