kernel/drivers/scsi/arcmsr/arcmsr_attr.c

   1 /*
   2 *******************************************************************************
   3 **        O.S   : Linux
   4 **   FILE NAME  : arcmsr_attr.c
   5 **        BY    : Nick Cheng
   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 #include <linux/circ_buf.h>
  54
  55 #include <scsi/scsi_cmnd.h>
  56 #include <scsi/scsi_device.h>
  57 #include <scsi/scsi_host.h>
  58 #include <scsi/scsi_transport.h>
  59 #include "arcmsr.h"
  60
  61 struct device_attribute *arcmsr_host_attrs[];
  62
  63 static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
  64                                              struct kobject *kobj,
  65                                              struct bin_attribute *bin,
  66                                              char *buf, loff_t off,
  67                                              size_t count)
  68 {
  69         struct device *dev = container_of(kobj,struct device,kobj);
  70         struct Scsi_Host *host = class_to_shost(dev);
  71         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
  72         uint8_t *ptmpQbuffer;
  73         int32_t allxfer_len = 0;
  74         unsigned long flags;
  75
  76         if (!capable(CAP_SYS_ADMIN))
  77                 return -EACCES;
  78
  79         /* do message unit read. */
  80         ptmpQbuffer = (uint8_t *)buf;
  81         spin_lock_irqsave(&acb->rqbuffer_lock, flags);
  82         if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
  83                 unsigned int tail = acb->rqbuf_getIndex;
  84                 unsigned int head = acb->rqbuf_putIndex;
  85                 unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
  86
  87                 allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
  88                 if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
  89                         allxfer_len = ARCMSR_API_DATA_BUFLEN;
  90
  91                 if (allxfer_len <= cnt_to_end)
  92                         memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
  93                 else {
  94                         memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
  95                         memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
  96                 }
  97                 acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
  98         }
  99         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
 100                 struct QBUFFER __iomem *prbuffer;
 101                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
 102                 prbuffer = arcmsr_get_iop_rqbuffer(acb);
 103                 if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
 104                         acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
 105         }
 106         spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
 107         return allxfer_len;
 108 }
 109
 110 static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
 111                                               struct kobject *kobj,
 112                                               struct bin_attribute *bin,
 113                                               char *buf, loff_t off,
 114                                               size_t count)
 115 {
 116         struct device *dev = container_of(kobj,struct device,kobj);
 117         struct Scsi_Host *host = class_to_shost(dev);
 118         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 119         int32_t user_len, cnt2end;
 120         uint8_t *pQbuffer, *ptmpuserbuffer;
 121         unsigned long flags;
 122
 123         if (!capable(CAP_SYS_ADMIN))
 124                 return -EACCES;
 125         if (count > ARCMSR_API_DATA_BUFLEN)
 126                 return -EINVAL;
 127         /* do message unit write. */
 128         ptmpuserbuffer = (uint8_t *)buf;
 129         user_len = (int32_t)count;
 130         spin_lock_irqsave(&acb->wqbuffer_lock, flags);
 131         if (acb->wqbuf_putIndex != acb->wqbuf_getIndex) {
 132                 arcmsr_write_ioctldata2iop(acb);
 133                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
 134                 return 0;       /*need retry*/
 135         } else {
 136                 pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
 137                 cnt2end = ARCMSR_MAX_QBUFFER - acb->wqbuf_putIndex;
 138                 if (user_len > cnt2end) {
 139                         memcpy(pQbuffer, ptmpuserbuffer, cnt2end);
 140                         ptmpuserbuffer += cnt2end;
 141                         user_len -= cnt2end;
 142                         acb->wqbuf_putIndex = 0;
 143                         pQbuffer = acb->wqbuffer;
 144                 }
 145                 memcpy(pQbuffer, ptmpuserbuffer, user_len);
 146                 acb->wqbuf_putIndex += user_len;
 147                 acb->wqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
 148                 if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
 149                         acb->acb_flags &=
 150                                 ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
 151                         arcmsr_write_ioctldata2iop(acb);
 152                 }
 153                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
 154                 return count;
 155         }
 156 }
 157
 158 static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
 159                                               struct kobject *kobj,
 160                                               struct bin_attribute *bin,
 161                                               char *buf, loff_t off,
 162                                               size_t count)
 163 {
 164         struct device *dev = container_of(kobj,struct device,kobj);
 165         struct Scsi_Host *host = class_to_shost(dev);
 166         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 167         uint8_t *pQbuffer;
 168         unsigned long flags;
 169
 170         if (!capable(CAP_SYS_ADMIN))
 171                 return -EACCES;
 172
 173         arcmsr_clear_iop2drv_rqueue_buffer(acb);
 174         acb->acb_flags |=
 175                 (ACB_F_MESSAGE_WQBUFFER_CLEARED
 176                 | ACB_F_MESSAGE_RQBUFFER_CLEARED
 177                 | ACB_F_MESSAGE_WQBUFFER_READED);
 178         spin_lock_irqsave(&acb->rqbuffer_lock, flags);
 179         acb->rqbuf_getIndex = 0;
 180         acb->rqbuf_putIndex = 0;
 181         spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
 182         spin_lock_irqsave(&acb->wqbuffer_lock, flags);
 183         acb->wqbuf_getIndex = 0;
 184         acb->wqbuf_putIndex = 0;
 185         spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
 186         pQbuffer = acb->rqbuffer;
 187         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 188         pQbuffer = acb->wqbuffer;
 189         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 190         return 1;
 191 }
 192
 193 static struct bin_attribute arcmsr_sysfs_message_read_attr = {
 194         .attr = {
 195                 .name = "mu_read",
 196                 .mode = S_IRUSR ,
 197         },
 198         .size = ARCMSR_API_DATA_BUFLEN,
 199         .read = arcmsr_sysfs_iop_message_read,
 200 };
 201
 202 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
 203         .attr = {
 204                 .name = "mu_write",
 205                 .mode = S_IWUSR,
 206         },
 207         .size = ARCMSR_API_DATA_BUFLEN,
 208         .write = arcmsr_sysfs_iop_message_write,
 209 };
 210
 211 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
 212         .attr = {
 213                 .name = "mu_clear",
 214                 .mode = S_IWUSR,
 215         },
 216         .size = 1,
 217         .write = arcmsr_sysfs_iop_message_clear,
 218 };
 219
 220 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
 221 {
 222         struct Scsi_Host *host = acb->host;
 223         int error;
 224
 225         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 226         if (error) {
 227                 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
 228                 goto error_bin_file_message_read;
 229         }
 230         error = sysfs_create_bin_file(&host->shost_dev.kobj, &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_dev.kobj, &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_dev.kobj, &arcmsr_sysfs_message_write_attr);
 243 error_bin_file_message_write:
 244         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 245 error_bin_file_message_read:
 246         return error;
 247 }
 248
 249 void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
 250 {
 251         struct Scsi_Host *host = acb->host;
 252
 253         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
 254         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
 255         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 256 }
 257
 258
 259 static ssize_t
 260 arcmsr_attr_host_driver_version(struct device *dev,
 261                                 struct device_attribute *attr, char *buf)
 262 {
 263         return snprintf(buf, PAGE_SIZE,
 264                         "%s\n",
 265                         ARCMSR_DRIVER_VERSION);
 266 }
 267
 268 static ssize_t
 269 arcmsr_attr_host_driver_posted_cmd(struct device *dev,
 270                                    struct device_attribute *attr, char *buf)
 271 {
 272         struct Scsi_Host *host = class_to_shost(dev);
 273         struct AdapterControlBlock *acb =
 274                 (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 device *dev,
 282                               struct device_attribute *attr, char *buf)
 283 {
 284         struct Scsi_Host *host = class_to_shost(dev);
 285         struct AdapterControlBlock *acb =
 286                 (struct AdapterControlBlock *) host->hostdata;
 287         return snprintf(buf, PAGE_SIZE,
 288                         "%4d\n",
 289                         acb->num_resets);
 290 }
 291
 292 static ssize_t
 293 arcmsr_attr_host_driver_abort(struct device *dev,
 294                               struct device_attribute *attr, char *buf)
 295 {
 296         struct Scsi_Host *host = class_to_shost(dev);
 297         struct AdapterControlBlock *acb =
 298                 (struct AdapterControlBlock *) host->hostdata;
 299         return snprintf(buf, PAGE_SIZE,
 300                         "%4d\n",
 301                         acb->num_aborts);
 302 }
 303
 304 static ssize_t
 305 arcmsr_attr_host_fw_model(struct device *dev, struct device_attribute *attr,
 306                           char *buf)
 307 {
 308         struct Scsi_Host *host = class_to_shost(dev);
 309         struct AdapterControlBlock *acb =
 310                 (struct AdapterControlBlock *) host->hostdata;
 311         return snprintf(buf, PAGE_SIZE,
 312                         "%s\n",
 313                         acb->firm_model);
 314 }
 315
 316 static ssize_t
 317 arcmsr_attr_host_fw_version(struct device *dev,
 318                             struct device_attribute *attr, char *buf)
 319 {
 320         struct Scsi_Host *host = class_to_shost(dev);
 321         struct AdapterControlBlock *acb =
 322                         (struct AdapterControlBlock *) host->hostdata;
 323
 324         return snprintf(buf, PAGE_SIZE,
 325                         "%s\n",
 326                         acb->firm_version);
 327 }
 328
 329 static ssize_t
 330 arcmsr_attr_host_fw_request_len(struct device *dev,
 331                                 struct device_attribute *attr, char *buf)
 332 {
 333         struct Scsi_Host *host = class_to_shost(dev);
 334         struct AdapterControlBlock *acb =
 335                 (struct AdapterControlBlock *) host->hostdata;
 336
 337         return snprintf(buf, PAGE_SIZE,
 338                         "%4d\n",
 339                         acb->firm_request_len);
 340 }
 341
 342 static ssize_t
 343 arcmsr_attr_host_fw_numbers_queue(struct device *dev,
 344                                   struct device_attribute *attr, char *buf)
 345 {
 346         struct Scsi_Host *host = class_to_shost(dev);
 347         struct AdapterControlBlock *acb =
 348                 (struct AdapterControlBlock *) host->hostdata;
 349
 350         return snprintf(buf, PAGE_SIZE,
 351                         "%4d\n",
 352                         acb->firm_numbers_queue);
 353 }
 354
 355 static ssize_t
 356 arcmsr_attr_host_fw_sdram_size(struct device *dev,
 357                                struct device_attribute *attr, char *buf)
 358 {
 359         struct Scsi_Host *host = class_to_shost(dev);
 360         struct AdapterControlBlock *acb =
 361                 (struct AdapterControlBlock *) host->hostdata;
 362
 363         return snprintf(buf, PAGE_SIZE,
 364                         "%4d\n",
 365                         acb->firm_sdram_size);
 366 }
 367
 368 static ssize_t
 369 arcmsr_attr_host_fw_hd_channels(struct device *dev,
 370                                 struct device_attribute *attr, char *buf)
 371 {
 372         struct Scsi_Host *host = class_to_shost(dev);
 373         struct AdapterControlBlock *acb =
 374                 (struct AdapterControlBlock *) host->hostdata;
 375
 376         return snprintf(buf, PAGE_SIZE,
 377                         "%4d\n",
 378                         acb->firm_hd_channels);
 379 }
 380
 381 static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
 382 static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
 383 static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
 384 static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
 385 static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
 386 static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
 387 static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
 388 static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
 389 static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
 390 static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
 391
 392 struct device_attribute *arcmsr_host_attrs[] = {
 393         &dev_attr_host_driver_version,
 394         &dev_attr_host_driver_posted_cmd,
 395         &dev_attr_host_driver_reset,
 396         &dev_attr_host_driver_abort,
 397         &dev_attr_host_fw_model,
 398         &dev_attr_host_fw_version,
 399         &dev_attr_host_fw_request_len,
 400         &dev_attr_host_fw_numbers_queue,
 401         &dev_attr_host_fw_sdram_size,
 402         &dev_attr_host_fw_hd_channels,
 403         NULL,
 404 };