drivers/scsi/arcmsr/arcmsr_attr.c

   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: support@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 device_attribute *arcmsr_host_attrs[];
  61
  62 static ssize_t arcmsr_sysfs_iop_message_read(struct kobject *kobj,
  63                                              struct bin_attribute *bin,
  64                                              char *buf, loff_t off,
  65                                              size_t count)
  66 {
  67         struct device *dev = container_of(kobj,struct device,kobj);
  68         struct Scsi_Host *host = class_to_shost(dev);
  69         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
  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;
  89                 uint8_t __iomem *iop_data;
  90                 int32_t iop_len;
  91
  92                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
  93                 prbuffer = arcmsr_get_iop_rqbuffer(acb);
  94                 iop_data = prbuffer->data;
  95                 iop_len = readl(&prbuffer->data_len);
  96                 while (iop_len > 0) {
  97                         acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
  98                         acb->rqbuf_lastindex++;
  99                         acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
 100                         iop_data++;
 101                         iop_len--;
 102                 }
 103                 arcmsr_iop_message_read(acb);
 104         }
 105         return (allxfer_len);
 106 }
 107
 108 static ssize_t arcmsr_sysfs_iop_message_write(struct kobject *kobj,
 109                                               struct bin_attribute *bin,
 110                                               char *buf, loff_t off,
 111                                               size_t count)
 112 {
 113         struct device *dev = container_of(kobj,struct device,kobj);
 114         struct Scsi_Host *host = class_to_shost(dev);
 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_ioctldata2iop(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_ioctldata2iop(acb);
 148                         }
 149                         return count;
 150                 } else {
 151                         return 0;       /*need retry*/
 152                 }
 153         }
 154 }
 155
 156 static ssize_t arcmsr_sysfs_iop_message_clear(struct kobject *kobj,
 157                                               struct bin_attribute *bin,
 158                                               char *buf, loff_t off,
 159                                               size_t count)
 160 {
 161         struct device *dev = container_of(kobj,struct device,kobj);
 162         struct Scsi_Host *host = class_to_shost(dev);
 163         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 164         uint8_t *pQbuffer;
 165
 166         if (!capable(CAP_SYS_ADMIN))
 167                 return -EACCES;
 168
 169         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
 170                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
 171                 arcmsr_iop_message_read(acb);
 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         },
 193         .size = 1032,
 194         .read = arcmsr_sysfs_iop_message_read,
 195 };
 196
 197 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
 198         .attr = {
 199                 .name = "mu_write",
 200                 .mode = S_IWUSR,
 201         },
 202         .size = 1032,
 203         .write = arcmsr_sysfs_iop_message_write,
 204 };
 205
 206 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
 207         .attr = {
 208                 .name = "mu_clear",
 209                 .mode = S_IWUSR,
 210         },
 211         .size = 1,
 212         .write = arcmsr_sysfs_iop_message_clear,
 213 };
 214
 215 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
 216 {
 217         struct Scsi_Host *host = acb->host;
 218         int error;
 219
 220         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 221         if (error) {
 222                 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
 223                 goto error_bin_file_message_read;
 224         }
 225         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
 226         if (error) {
 227                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
 228                 goto error_bin_file_message_write;
 229         }
 230         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
 231         if (error) {
 232                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
 233                 goto error_bin_file_message_clear;
 234         }
 235         return 0;
 236 error_bin_file_message_clear:
 237         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
 238 error_bin_file_message_write:
 239         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 240 error_bin_file_message_read:
 241         return error;
 242 }
 243
 244 void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
 245 {
 246         struct Scsi_Host *host = acb->host;
 247
 248         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
 249         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
 250         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 251 }
 252
 253
 254 static ssize_t
 255 arcmsr_attr_host_driver_version(struct device *dev,
 256                                 struct device_attribute *attr, char *buf)
 257 {
 258         return snprintf(buf, PAGE_SIZE,
 259                         "%s\n",
 260                         ARCMSR_DRIVER_VERSION);
 261 }
 262
 263 static ssize_t
 264 arcmsr_attr_host_driver_posted_cmd(struct device *dev,
 265                                    struct device_attribute *attr, char *buf)
 266 {
 267         struct Scsi_Host *host = class_to_shost(dev);
 268         struct AdapterControlBlock *acb =
 269                 (struct AdapterControlBlock *) host->hostdata;
 270         return snprintf(buf, PAGE_SIZE,
 271                         "%4d\n",
 272                         atomic_read(&acb->ccboutstandingcount));
 273 }
 274
 275 static ssize_t
 276 arcmsr_attr_host_driver_reset(struct device *dev,
 277                               struct device_attribute *attr, char *buf)
 278 {
 279         struct Scsi_Host *host = class_to_shost(dev);
 280         struct AdapterControlBlock *acb =
 281                 (struct AdapterControlBlock *) host->hostdata;
 282         return snprintf(buf, PAGE_SIZE,
 283                         "%4d\n",
 284                         acb->num_resets);
 285 }
 286
 287 static ssize_t
 288 arcmsr_attr_host_driver_abort(struct device *dev,
 289                               struct device_attribute *attr, char *buf)
 290 {
 291         struct Scsi_Host *host = class_to_shost(dev);
 292         struct AdapterControlBlock *acb =
 293                 (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 device *dev, struct device_attribute *attr,
 301                           char *buf)
 302 {
 303         struct Scsi_Host *host = class_to_shost(dev);
 304         struct AdapterControlBlock *acb =
 305                 (struct AdapterControlBlock *) host->hostdata;
 306         return snprintf(buf, PAGE_SIZE,
 307                         "%s\n",
 308                         acb->firm_model);
 309 }
 310
 311 static ssize_t
 312 arcmsr_attr_host_fw_version(struct device *dev,
 313                             struct device_attribute *attr, char *buf)
 314 {
 315         struct Scsi_Host *host = class_to_shost(dev);
 316         struct AdapterControlBlock *acb =
 317                         (struct AdapterControlBlock *) host->hostdata;
 318
 319         return snprintf(buf, PAGE_SIZE,
 320                         "%s\n",
 321                         acb->firm_version);
 322 }
 323
 324 static ssize_t
 325 arcmsr_attr_host_fw_request_len(struct device *dev,
 326                                 struct device_attribute *attr, char *buf)
 327 {
 328         struct Scsi_Host *host = class_to_shost(dev);
 329         struct AdapterControlBlock *acb =
 330                 (struct AdapterControlBlock *) host->hostdata;
 331
 332         return snprintf(buf, PAGE_SIZE,
 333                         "%4d\n",
 334                         acb->firm_request_len);
 335 }
 336
 337 static ssize_t
 338 arcmsr_attr_host_fw_numbers_queue(struct device *dev,
 339                                   struct device_attribute *attr, char *buf)
 340 {
 341         struct Scsi_Host *host = class_to_shost(dev);
 342         struct AdapterControlBlock *acb =
 343                 (struct AdapterControlBlock *) host->hostdata;
 344
 345         return snprintf(buf, PAGE_SIZE,
 346                         "%4d\n",
 347                         acb->firm_numbers_queue);
 348 }
 349
 350 static ssize_t
 351 arcmsr_attr_host_fw_sdram_size(struct device *dev,
 352                                struct device_attribute *attr, char *buf)
 353 {
 354         struct Scsi_Host *host = class_to_shost(dev);
 355         struct AdapterControlBlock *acb =
 356                 (struct AdapterControlBlock *) host->hostdata;
 357
 358         return snprintf(buf, PAGE_SIZE,
 359                         "%4d\n",
 360                         acb->firm_sdram_size);
 361 }
 362
 363 static ssize_t
 364 arcmsr_attr_host_fw_hd_channels(struct device *dev,
 365                                 struct device_attribute *attr, char *buf)
 366 {
 367         struct Scsi_Host *host = class_to_shost(dev);
 368         struct AdapterControlBlock *acb =
 369                 (struct AdapterControlBlock *) host->hostdata;
 370
 371         return snprintf(buf, PAGE_SIZE,
 372                         "%4d\n",
 373                         acb->firm_hd_channels);
 374 }
 375
 376 static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
 377 static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
 378 static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
 379 static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
 380 static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
 381 static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
 382 static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
 383 static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
 384 static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
 385 static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
 386
 387 struct device_attribute *arcmsr_host_attrs[] = {
 388         &dev_attr_host_driver_version,
 389         &dev_attr_host_driver_posted_cmd,
 390         &dev_attr_host_driver_reset,
 391         &dev_attr_host_driver_abort,
 392         &dev_attr_host_fw_model,
 393         &dev_attr_host_fw_version,
 394         &dev_attr_host_fw_request_len,
 395         &dev_attr_host_fw_numbers_queue,
 396         &dev_attr_host_fw_sdram_size,
 397         &dev_attr_host_fw_hd_channels,
 398         NULL,
 399 };