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 class_device_attribute *arcmsr_host_attrs[];
  61
  62 static ssize_t arcmsr_sysfs_iop_message_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
  63 {
  64         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
  65         struct Scsi_Host *host = class_to_shost(cdev);
  66         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
  67         uint8_t *pQbuffer,*ptmpQbuffer;
  68         int32_t allxfer_len = 0;
  69
  70         if (!capable(CAP_SYS_ADMIN))
  71                 return -EACCES;
  72
  73         /* do message unit read. */
  74         ptmpQbuffer = (uint8_t *)buf;
  75         while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
  76                 && (allxfer_len < 1031)) {
  77                 pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
  78                 memcpy(ptmpQbuffer, pQbuffer, 1);
  79                 acb->rqbuf_firstindex++;
  80                 acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
  81                 ptmpQbuffer++;
  82                 allxfer_len++;
  83         }
  84         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
  85                 struct QBUFFER *prbuffer;
  86                 uint8_t *iop_data;
  87                 int32_t iop_len;
  88
  89                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
  90                 prbuffer = arcmsr_get_iop_rqbuffer(acb);
  91                 iop_data = (uint8_t *)prbuffer->data;
  92                 iop_len = readl(&prbuffer->data_len);
  93                 while (iop_len > 0) {
  94                         acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
  95                         acb->rqbuf_lastindex++;
  96                         acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
  97                         iop_data++;
  98                         iop_len--;
  99                 }
 100                 arcmsr_iop_message_read(acb);
 101         }
 102         return (allxfer_len);
 103 }
 104
 105 static ssize_t arcmsr_sysfs_iop_message_write(struct kobject *kobj, char *buf, loff_t off, size_t count)
 106 {
 107         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
 108         struct Scsi_Host *host = class_to_shost(cdev);
 109         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 110         int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
 111         uint8_t *pQbuffer, *ptmpuserbuffer;
 112
 113         if (!capable(CAP_SYS_ADMIN))
 114                 return -EACCES;
 115         if (count > 1032)
 116                 return -EINVAL;
 117         /* do message unit write. */
 118         ptmpuserbuffer = (uint8_t *)buf;
 119         user_len = (int32_t)count;
 120         wqbuf_lastindex = acb->wqbuf_lastindex;
 121         wqbuf_firstindex = acb->wqbuf_firstindex;
 122         if (wqbuf_lastindex != wqbuf_firstindex) {
 123                 arcmsr_post_ioctldata2iop(acb);
 124                 return 0;       /*need retry*/
 125         } else {
 126                 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
 127                                 &(ARCMSR_MAX_QBUFFER - 1);
 128                 if (my_empty_len >= user_len) {
 129                         while (user_len > 0) {
 130                                 pQbuffer =
 131                                 &acb->wqbuffer[acb->wqbuf_lastindex];
 132                                 memcpy(pQbuffer, ptmpuserbuffer, 1);
 133                                 acb->wqbuf_lastindex++;
 134                                 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
 135                                 ptmpuserbuffer++;
 136                                 user_len--;
 137                         }
 138                         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
 139                                 acb->acb_flags &=
 140                                         ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
 141                                 arcmsr_post_ioctldata2iop(acb);
 142                         }
 143                         return count;
 144                 } else {
 145                         return 0;       /*need retry*/
 146                 }
 147         }
 148 }
 149
 150 static ssize_t arcmsr_sysfs_iop_message_clear(struct kobject *kobj, char *buf, loff_t off, size_t count)
 151 {
 152         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
 153         struct Scsi_Host *host = class_to_shost(cdev);
 154         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 155         uint8_t *pQbuffer;
 156
 157         if (!capable(CAP_SYS_ADMIN))
 158                 return -EACCES;
 159
 160         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
 161                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
 162                 arcmsr_iop_message_read(acb);
 163         }
 164         acb->acb_flags |=
 165                 (ACB_F_MESSAGE_WQBUFFER_CLEARED
 166                 | ACB_F_MESSAGE_RQBUFFER_CLEARED
 167                 | ACB_F_MESSAGE_WQBUFFER_READED);
 168         acb->rqbuf_firstindex = 0;
 169         acb->rqbuf_lastindex = 0;
 170         acb->wqbuf_firstindex = 0;
 171         acb->wqbuf_lastindex = 0;
 172         pQbuffer = acb->rqbuffer;
 173         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 174         pQbuffer = acb->wqbuffer;
 175         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 176         return 1;
 177 }
 178
 179 static struct bin_attribute arcmsr_sysfs_message_read_attr = {
 180         .attr = {
 181                 .name = "mu_read",
 182                 .mode = S_IRUSR ,
 183                 .owner = THIS_MODULE,
 184         },
 185         .size = 1032,
 186         .read = arcmsr_sysfs_iop_message_read,
 187 };
 188
 189 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
 190         .attr = {
 191                 .name = "mu_write",
 192                 .mode = S_IWUSR,
 193                 .owner = THIS_MODULE,
 194         },
 195         .size = 1032,
 196         .write = arcmsr_sysfs_iop_message_write,
 197 };
 198
 199 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
 200         .attr = {
 201                 .name = "mu_clear",
 202                 .mode = S_IWUSR,
 203                 .owner = THIS_MODULE,
 204         },
 205         .size = 1,
 206         .write = arcmsr_sysfs_iop_message_clear,
 207 };
 208
 209 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
 210 {
 211         struct Scsi_Host *host = acb->host;
 212         int error;
 213
 214         error = sysfs_create_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_read_attr);
 215         if (error) {
 216                 printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
 217                 goto error_bin_file_message_read;
 218         }
 219         error = sysfs_create_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_write_attr);
 220         if (error) {
 221                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
 222                 goto error_bin_file_message_write;
 223         }
 224         error = sysfs_create_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_clear_attr);
 225         if (error) {
 226                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
 227                 goto error_bin_file_message_clear;
 228         }
 229         return 0;
 230 error_bin_file_message_clear:
 231         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_write_attr);
 232 error_bin_file_message_write:
 233         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_read_attr);
 234 error_bin_file_message_read:
 235         return error;
 236 }
 237
 238 void
 239 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) {
 240         struct Scsi_Host *host = acb->host;
 241
 242         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_clear_attr);
 243         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_write_attr);
 244         sysfs_remove_bin_file(&host->shost_classdev.kobj, &arcmsr_sysfs_message_read_attr);
 245 }
 246
 247
 248 static ssize_t
 249 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) {
 250         return snprintf(buf, PAGE_SIZE,
 251                         "%s\n",
 252                         ARCMSR_DRIVER_VERSION);
 253 }
 254
 255 static ssize_t
 256 arcmsr_attr_host_driver_posted_cmd(struct class_device *cdev, char *buf) {
 257         struct Scsi_Host *host = class_to_shost(cdev);
 258         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 259         return snprintf(buf, PAGE_SIZE,
 260                         "%4d\n",
 261                         atomic_read(&acb->ccboutstandingcount));
 262 }
 263
 264 static ssize_t
 265 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) {
 266         struct Scsi_Host *host = class_to_shost(cdev);
 267         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 268         return snprintf(buf, PAGE_SIZE,
 269                         "%4d\n",
 270                         acb->num_resets);
 271 }
 272
 273 static ssize_t
 274 arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) {
 275         struct Scsi_Host *host = class_to_shost(cdev);
 276         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 277         return snprintf(buf, PAGE_SIZE,
 278                         "%4d\n",
 279                         acb->num_aborts);
 280 }
 281
 282 static ssize_t
 283 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) {
 284     struct Scsi_Host *host = class_to_shost(cdev);
 285         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 286         return snprintf(buf, PAGE_SIZE,
 287                         "%s\n",
 288                         acb->firm_model);
 289 }
 290
 291 static ssize_t
 292 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) {
 293         struct Scsi_Host *host = class_to_shost(cdev);
 294         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 295
 296         return snprintf(buf, PAGE_SIZE,
 297                         "%s\n",
 298                         acb->firm_version);
 299 }
 300
 301 static ssize_t
 302 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) {
 303         struct Scsi_Host *host = class_to_shost(cdev);
 304         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 305
 306         return snprintf(buf, PAGE_SIZE,
 307                         "%4d\n",
 308                         acb->firm_request_len);
 309 }
 310
 311 static ssize_t
 312 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) {
 313         struct Scsi_Host *host = class_to_shost(cdev);
 314         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 315
 316         return snprintf(buf, PAGE_SIZE,
 317                         "%4d\n",
 318                         acb->firm_numbers_queue);
 319 }
 320
 321 static ssize_t
 322 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) {
 323         struct Scsi_Host *host = class_to_shost(cdev);
 324         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 325
 326         return snprintf(buf, PAGE_SIZE,
 327                         "%4d\n",
 328                         acb->firm_sdram_size);
 329 }
 330
 331 static ssize_t
 332 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) {
 333         struct Scsi_Host *host = class_to_shost(cdev);
 334         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 335
 336         return snprintf(buf, PAGE_SIZE,
 337                         "%4d\n",
 338                         acb->firm_hd_channels);
 339 }
 340
 341 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
 342 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
 343 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
 344 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
 345 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
 346 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
 347 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
 348 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
 349 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
 350 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
 351
 352 struct class_device_attribute *arcmsr_host_attrs[] = {
 353         &class_device_attr_host_driver_version,
 354         &class_device_attr_host_driver_posted_cmd,
 355         &class_device_attr_host_driver_reset,
 356         &class_device_attr_host_driver_abort,
 357         &class_device_attr_host_fw_model,
 358         &class_device_attr_host_fw_version,
 359         &class_device_attr_host_fw_request_len,
 360         &class_device_attr_host_fw_numbers_queue,
 361         &class_device_attr_host_fw_sdram_size,
 362         &class_device_attr_host_fw_hd_channels,
 363         NULL,
 364 };