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: 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                                         &reg->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                                 &reg->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                                 , &reg->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 };