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.rst
  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 static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
  62                                              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 *ptmpQbuffer;
  71         int32_t allxfer_len = 0;
  72         unsigned long flags;
  73
  74         if (!capable(CAP_SYS_ADMIN))
  75                 return -EACCES;
  76
  77         /* do message unit read. */
  78         ptmpQbuffer = (uint8_t *)buf;
  79         spin_lock_irqsave(&acb->rqbuffer_lock, flags);
  80         if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
  81                 unsigned int tail = acb->rqbuf_getIndex;
  82                 unsigned int head = acb->rqbuf_putIndex;
  83                 unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
  84
  85                 allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
  86                 if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
  87                         allxfer_len = ARCMSR_API_DATA_BUFLEN;
  88
  89                 if (allxfer_len <= cnt_to_end)
  90                         memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
  91                 else {
  92                         memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
  93                         memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
  94                 }
  95                 acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
  96         }
  97         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
  98                 struct QBUFFER __iomem *prbuffer;
  99                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
 100                 prbuffer = arcmsr_get_iop_rqbuffer(acb);
 101                 if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
 102                         acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
 103         }
 104         spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
 105         return allxfer_len;
 106 }
 107
 108 static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
 109                                               struct kobject *kobj,
 110                                               struct bin_attribute *bin,
 111                                               char *buf, loff_t off,
 112                                               size_t count)
 113 {
 114         struct device *dev = container_of(kobj,struct device,kobj);
 115         struct Scsi_Host *host = class_to_shost(dev);
 116         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 117         int32_t user_len, cnt2end;
 118         uint8_t *pQbuffer, *ptmpuserbuffer;
 119         unsigned long flags;
 120
 121         if (!capable(CAP_SYS_ADMIN))
 122                 return -EACCES;
 123         if (count > ARCMSR_API_DATA_BUFLEN)
 124                 return -EINVAL;
 125         /* do message unit write. */
 126         ptmpuserbuffer = (uint8_t *)buf;
 127         user_len = (int32_t)count;
 128         spin_lock_irqsave(&acb->wqbuffer_lock, flags);
 129         if (acb->wqbuf_putIndex != acb->wqbuf_getIndex) {
 130                 arcmsr_write_ioctldata2iop(acb);
 131                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
 132                 return 0;       /*need retry*/
 133         } else {
 134                 pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
 135                 cnt2end = ARCMSR_MAX_QBUFFER - acb->wqbuf_putIndex;
 136                 if (user_len > cnt2end) {
 137                         memcpy(pQbuffer, ptmpuserbuffer, cnt2end);
 138                         ptmpuserbuffer += cnt2end;
 139                         user_len -= cnt2end;
 140                         acb->wqbuf_putIndex = 0;
 141                         pQbuffer = acb->wqbuffer;
 142                 }
 143                 memcpy(pQbuffer, ptmpuserbuffer, user_len);
 144                 acb->wqbuf_putIndex += user_len;
 145                 acb->wqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
 146                 if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
 147                         acb->acb_flags &=
 148                                 ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
 149                         arcmsr_write_ioctldata2iop(acb);
 150                 }
 151                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
 152                 return count;
 153         }
 154 }
 155
 156 static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
 157                                               struct kobject *kobj,
 158                                               struct bin_attribute *bin,
 159                                               char *buf, loff_t off,
 160                                               size_t count)
 161 {
 162         struct device *dev = container_of(kobj,struct device,kobj);
 163         struct Scsi_Host *host = class_to_shost(dev);
 164         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 165         uint8_t *pQbuffer;
 166         unsigned long flags;
 167
 168         if (!capable(CAP_SYS_ADMIN))
 169                 return -EACCES;
 170
 171         arcmsr_clear_iop2drv_rqueue_buffer(acb);
 172         acb->acb_flags |=
 173                 (ACB_F_MESSAGE_WQBUFFER_CLEARED
 174                 | ACB_F_MESSAGE_RQBUFFER_CLEARED
 175                 | ACB_F_MESSAGE_WQBUFFER_READED);
 176         spin_lock_irqsave(&acb->rqbuffer_lock, flags);
 177         acb->rqbuf_getIndex = 0;
 178         acb->rqbuf_putIndex = 0;
 179         spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
 180         spin_lock_irqsave(&acb->wqbuffer_lock, flags);
 181         acb->wqbuf_getIndex = 0;
 182         acb->wqbuf_putIndex = 0;
 183         spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
 184         pQbuffer = acb->rqbuffer;
 185         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 186         pQbuffer = acb->wqbuffer;
 187         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 188         return 1;
 189 }
 190
 191 static const struct bin_attribute arcmsr_sysfs_message_read_attr = {
 192         .attr = {
 193                 .name = "mu_read",
 194                 .mode = S_IRUSR ,
 195         },
 196         .size = ARCMSR_API_DATA_BUFLEN,
 197         .read = arcmsr_sysfs_iop_message_read,
 198 };
 199
 200 static const struct bin_attribute arcmsr_sysfs_message_write_attr = {
 201         .attr = {
 202                 .name = "mu_write",
 203                 .mode = S_IWUSR,
 204         },
 205         .size = ARCMSR_API_DATA_BUFLEN,
 206         .write = arcmsr_sysfs_iop_message_write,
 207 };
 208
 209 static const struct bin_attribute arcmsr_sysfs_message_clear_attr = {
 210         .attr = {
 211                 .name = "mu_clear",
 212                 .mode = S_IWUSR,
 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_dev.kobj, &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_dev.kobj, &arcmsr_sysfs_message_write_attr);
 229         if (error) {
 230                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
 231                 goto error_bin_file_message_write;
 232         }
 233         error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
 234         if (error) {
 235                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
 236                 goto error_bin_file_message_clear;
 237         }
 238         return 0;
 239 error_bin_file_message_clear:
 240         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
 241 error_bin_file_message_write:
 242         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 243 error_bin_file_message_read:
 244         return error;
 245 }
 246
 247 void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
 248 {
 249         struct Scsi_Host *host = acb->host;
 250
 251         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
 252         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
 253         sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
 254 }
 255
 256
 257 static ssize_t
 258 arcmsr_attr_host_driver_version(struct device *dev,
 259                                 struct device_attribute *attr, char *buf)
 260 {
 261         return snprintf(buf, PAGE_SIZE,
 262                         "%s\n",
 263                         ARCMSR_DRIVER_VERSION);
 264 }
 265
 266 static ssize_t
 267 arcmsr_attr_host_driver_posted_cmd(struct device *dev,
 268                                    struct device_attribute *attr, char *buf)
 269 {
 270         struct Scsi_Host *host = class_to_shost(dev);
 271         struct AdapterControlBlock *acb =
 272                 (struct AdapterControlBlock *) host->hostdata;
 273         return snprintf(buf, PAGE_SIZE,
 274                         "%4d\n",
 275                         atomic_read(&acb->ccboutstandingcount));
 276 }
 277
 278 static ssize_t
 279 arcmsr_attr_host_driver_reset(struct device *dev,
 280                               struct device_attribute *attr, char *buf)
 281 {
 282         struct Scsi_Host *host = class_to_shost(dev);
 283         struct AdapterControlBlock *acb =
 284                 (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 device *dev,
 292                               struct device_attribute *attr, char *buf)
 293 {
 294         struct Scsi_Host *host = class_to_shost(dev);
 295         struct AdapterControlBlock *acb =
 296                 (struct AdapterControlBlock *) host->hostdata;
 297         return snprintf(buf, PAGE_SIZE,
 298                         "%4d\n",
 299                         acb->num_aborts);
 300 }
 301
 302 static ssize_t
 303 arcmsr_attr_host_fw_model(struct device *dev, struct device_attribute *attr,
 304                           char *buf)
 305 {
 306         struct Scsi_Host *host = class_to_shost(dev);
 307         struct AdapterControlBlock *acb =
 308                 (struct AdapterControlBlock *) host->hostdata;
 309         return snprintf(buf, PAGE_SIZE,
 310                         "%s\n",
 311                         acb->firm_model);
 312 }
 313
 314 static ssize_t
 315 arcmsr_attr_host_fw_version(struct device *dev,
 316                             struct device_attribute *attr, char *buf)
 317 {
 318         struct Scsi_Host *host = class_to_shost(dev);
 319         struct AdapterControlBlock *acb =
 320                         (struct AdapterControlBlock *) host->hostdata;
 321
 322         return snprintf(buf, PAGE_SIZE,
 323                         "%s\n",
 324                         acb->firm_version);
 325 }
 326
 327 static ssize_t
 328 arcmsr_attr_host_fw_request_len(struct device *dev,
 329                                 struct device_attribute *attr, char *buf)
 330 {
 331         struct Scsi_Host *host = class_to_shost(dev);
 332         struct AdapterControlBlock *acb =
 333                 (struct AdapterControlBlock *) host->hostdata;
 334
 335         return snprintf(buf, PAGE_SIZE,
 336                         "%4d\n",
 337                         acb->firm_request_len);
 338 }
 339
 340 static ssize_t
 341 arcmsr_attr_host_fw_numbers_queue(struct device *dev,
 342                                   struct device_attribute *attr, char *buf)
 343 {
 344         struct Scsi_Host *host = class_to_shost(dev);
 345         struct AdapterControlBlock *acb =
 346                 (struct AdapterControlBlock *) host->hostdata;
 347
 348         return snprintf(buf, PAGE_SIZE,
 349                         "%4d\n",
 350                         acb->firm_numbers_queue);
 351 }
 352
 353 static ssize_t
 354 arcmsr_attr_host_fw_sdram_size(struct device *dev,
 355                                struct device_attribute *attr, char *buf)
 356 {
 357         struct Scsi_Host *host = class_to_shost(dev);
 358         struct AdapterControlBlock *acb =
 359                 (struct AdapterControlBlock *) host->hostdata;
 360
 361         return snprintf(buf, PAGE_SIZE,
 362                         "%4d\n",
 363                         acb->firm_sdram_size);
 364 }
 365
 366 static ssize_t
 367 arcmsr_attr_host_fw_hd_channels(struct device *dev,
 368                                 struct device_attribute *attr, char *buf)
 369 {
 370         struct Scsi_Host *host = class_to_shost(dev);
 371         struct AdapterControlBlock *acb =
 372                 (struct AdapterControlBlock *) host->hostdata;
 373
 374         return snprintf(buf, PAGE_SIZE,
 375                         "%4d\n",
 376                         acb->firm_hd_channels);
 377 }
 378
 379 static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
 380 static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
 381 static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
 382 static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
 383 static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
 384 static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
 385 static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
 386 static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
 387 static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
 388 static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
 389
 390 static struct attribute *arcmsr_host_attrs[] = {
 391         &dev_attr_host_driver_version.attr,
 392         &dev_attr_host_driver_posted_cmd.attr,
 393         &dev_attr_host_driver_reset.attr,
 394         &dev_attr_host_driver_abort.attr,
 395         &dev_attr_host_fw_model.attr,
 396         &dev_attr_host_fw_version.attr,
 397         &dev_attr_host_fw_request_len.attr,
 398         &dev_attr_host_fw_numbers_queue.attr,
 399         &dev_attr_host_fw_sdram_size.attr,
 400         &dev_attr_host_fw_hd_channels.attr,
 401         NULL,
 402 };
 403
 404 static const struct attribute_group arcmsr_host_attr_group = {
 405         .attrs = arcmsr_host_attrs,
 406 };
 407
 408 const struct attribute_group *arcmsr_host_groups[] = {
 409         &arcmsr_host_attr_group,
 410         NULL
 411 };