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 #include <linux/pci.h> 53 54 #include <scsi/scsi_cmnd.h> 55 #include <scsi/scsi_device.h> 56 #include <scsi/scsi_host.h> 57 #include <scsi/scsi_transport.h> 58 #include "arcmsr.h" 59 60 struct class_device_attribute *arcmsr_host_attrs[]; 61 62 static ssize_t 63 arcmsr_sysfs_iop_message_read(struct kobject *kobj, char *buf, loff_t off, 64 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, char *buf, loff_t off, 110 size_t count) 111 { 112 struct class_device *cdev = container_of(kobj,struct class_device,kobj); 113 struct Scsi_Host *host = class_to_shost(cdev); 114 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 115 int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex; 116 uint8_t *pQbuffer, *ptmpuserbuffer; 117 118 if (!capable(CAP_SYS_ADMIN)) 119 return -EACCES; 120 if (count > 1032) 121 return -EINVAL; 122 /* do message unit write. */ 123 ptmpuserbuffer = (uint8_t *)buf; 124 user_len = (int32_t)count; 125 wqbuf_lastindex = acb->wqbuf_lastindex; 126 wqbuf_firstindex = acb->wqbuf_firstindex; 127 if (wqbuf_lastindex != wqbuf_firstindex) { 128 arcmsr_post_Qbuffer(acb); 129 return 0; /*need retry*/ 130 } else { 131 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1) 132 &(ARCMSR_MAX_QBUFFER - 1); 133 if (my_empty_len >= user_len) { 134 while (user_len > 0) { 135 pQbuffer = 136 &acb->wqbuffer[acb->wqbuf_lastindex]; 137 memcpy(pQbuffer, ptmpuserbuffer, 1); 138 acb->wqbuf_lastindex++; 139 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER; 140 ptmpuserbuffer++; 141 user_len--; 142 } 143 if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) { 144 acb->acb_flags &= 145 ~ACB_F_MESSAGE_WQBUFFER_CLEARED; 146 arcmsr_post_Qbuffer(acb); 147 } 148 return count; 149 } else { 150 return 0; /*need retry*/ 151 } 152 } 153 } 154 155 static ssize_t 156 arcmsr_sysfs_iop_message_clear(struct kobject *kobj, char *buf, loff_t off, 157 size_t count) 158 { 159 struct class_device *cdev = container_of(kobj,struct class_device,kobj); 160 struct Scsi_Host *host = class_to_shost(cdev); 161 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 162 struct MessageUnit __iomem *reg = acb->pmu; 163 uint8_t *pQbuffer; 164 165 if (!capable(CAP_SYS_ADMIN)) 166 return -EACCES; 167 168 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) { 169 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW; 170 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK 171 , ®->inbound_doorbell); 172 } 173 acb->acb_flags |= 174 (ACB_F_MESSAGE_WQBUFFER_CLEARED 175 | ACB_F_MESSAGE_RQBUFFER_CLEARED 176 | ACB_F_MESSAGE_WQBUFFER_READED); 177 acb->rqbuf_firstindex = 0; 178 acb->rqbuf_lastindex = 0; 179 acb->wqbuf_firstindex = 0; 180 acb->wqbuf_lastindex = 0; 181 pQbuffer = acb->rqbuffer; 182 memset(pQbuffer, 0, sizeof (struct QBUFFER)); 183 pQbuffer = acb->wqbuffer; 184 memset(pQbuffer, 0, sizeof (struct QBUFFER)); 185 return 1; 186 } 187 188 static struct bin_attribute arcmsr_sysfs_message_read_attr = { 189 .attr = { 190 .name = "mu_read", 191 .mode = S_IRUSR , 192 .owner = THIS_MODULE, 193 }, 194 .size = 1032, 195 .read = arcmsr_sysfs_iop_message_read, 196 }; 197 198 static struct bin_attribute arcmsr_sysfs_message_write_attr = { 199 .attr = { 200 .name = "mu_write", 201 .mode = S_IWUSR, 202 .owner = THIS_MODULE, 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 .owner = THIS_MODULE, 213 }, 214 .size = 1, 215 .write = arcmsr_sysfs_iop_message_clear, 216 }; 217 218 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb) 219 { 220 struct Scsi_Host *host = acb->host; 221 int error; 222 223 error = sysfs_create_bin_file(&host->shost_classdev.kobj, 224 &arcmsr_sysfs_message_read_attr); 225 if (error) { 226 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n"); 227 goto error_bin_file_message_read; 228 } 229 error = sysfs_create_bin_file(&host->shost_classdev.kobj, 230 &arcmsr_sysfs_message_write_attr); 231 if (error) { 232 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n"); 233 goto error_bin_file_message_write; 234 } 235 error = sysfs_create_bin_file(&host->shost_classdev.kobj, 236 &arcmsr_sysfs_message_clear_attr); 237 if (error) { 238 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n"); 239 goto error_bin_file_message_clear; 240 } 241 return 0; 242 error_bin_file_message_clear: 243 sysfs_remove_bin_file(&host->shost_classdev.kobj, 244 &arcmsr_sysfs_message_write_attr); 245 error_bin_file_message_write: 246 sysfs_remove_bin_file(&host->shost_classdev.kobj, 247 &arcmsr_sysfs_message_read_attr); 248 error_bin_file_message_read: 249 return error; 250 } 251 252 void 253 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) { 254 struct Scsi_Host *host = acb->host; 255 256 sysfs_remove_bin_file(&host->shost_classdev.kobj, 257 &arcmsr_sysfs_message_clear_attr); 258 sysfs_remove_bin_file(&host->shost_classdev.kobj, 259 &arcmsr_sysfs_message_write_attr); 260 sysfs_remove_bin_file(&host->shost_classdev.kobj, 261 &arcmsr_sysfs_message_read_attr); 262 } 263 264 265 static ssize_t 266 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) { 267 return snprintf(buf, PAGE_SIZE, 268 "%s\n", 269 ARCMSR_DRIVER_VERSION); 270 } 271 272 static ssize_t 273 arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) { 274 struct Scsi_Host *host = class_to_shost(cdev); 275 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 276 return snprintf(buf, PAGE_SIZE, 277 "%4d\n", 278 atomic_read(&acb->ccboutstandingcount)); 279 } 280 281 static ssize_t 282 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) { 283 struct Scsi_Host *host = class_to_shost(cdev); 284 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 285 return snprintf(buf, PAGE_SIZE, 286 "%4d\n", 287 acb->num_resets); 288 } 289 290 static ssize_t 291 arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) { 292 struct Scsi_Host *host = class_to_shost(cdev); 293 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 294 return snprintf(buf, PAGE_SIZE, 295 "%4d\n", 296 acb->num_aborts); 297 } 298 299 static ssize_t 300 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) { 301 struct Scsi_Host *host = class_to_shost(cdev); 302 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 303 return snprintf(buf, PAGE_SIZE, 304 "%s\n", 305 acb->firm_model); 306 } 307 308 static ssize_t 309 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) { 310 struct Scsi_Host *host = class_to_shost(cdev); 311 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 312 313 return snprintf(buf, PAGE_SIZE, 314 "%s\n", 315 acb->firm_version); 316 } 317 318 static ssize_t 319 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) { 320 struct Scsi_Host *host = class_to_shost(cdev); 321 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 322 323 return snprintf(buf, PAGE_SIZE, 324 "%4d\n", 325 acb->firm_request_len); 326 } 327 328 static ssize_t 329 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) { 330 struct Scsi_Host *host = class_to_shost(cdev); 331 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 332 333 return snprintf(buf, PAGE_SIZE, 334 "%4d\n", 335 acb->firm_numbers_queue); 336 } 337 338 static ssize_t 339 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) { 340 struct Scsi_Host *host = class_to_shost(cdev); 341 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 342 343 return snprintf(buf, PAGE_SIZE, 344 "%4d\n", 345 acb->firm_sdram_size); 346 } 347 348 static ssize_t 349 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) { 350 struct Scsi_Host *host = class_to_shost(cdev); 351 struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata; 352 353 return snprintf(buf, PAGE_SIZE, 354 "%4d\n", 355 acb->firm_hd_channels); 356 } 357 358 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL); 359 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL); 360 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL); 361 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL); 362 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL); 363 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL); 364 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL); 365 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL); 366 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL); 367 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL); 368 369 struct class_device_attribute *arcmsr_host_attrs[] = { 370 &class_device_attr_host_driver_version, 371 &class_device_attr_host_driver_posted_cmd, 372 &class_device_attr_host_driver_reset, 373 &class_device_attr_host_driver_abort, 374 &class_device_attr_host_fw_model, 375 &class_device_attr_host_fw_version, 376 &class_device_attr_host_fw_request_len, 377 &class_device_attr_host_fw_numbers_queue, 378 &class_device_attr_host_fw_sdram_size, 379 &class_device_attr_host_fw_hd_channels, 380 NULL, 381 }; 382