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
  53 #include <scsi/scsi_cmnd.h>
  54 #include <scsi/scsi_device.h>
  55 #include <scsi/scsi_host.h>
  56 #include <scsi/scsi_transport.h>
  57 #include "arcmsr.h"
  58
  59 struct class_device_attribute *arcmsr_host_attrs[];
  60
  61 static ssize_t
  62 arcmsr_sysfs_iop_message_read(struct kobject *kobj, char *buf, loff_t off,
  63     size_t count)
  64 {
  65         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
  66         struct Scsi_Host *host = class_to_shost(cdev);
  67         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
  68         struct MessageUnit __iomem *reg = acb->pmu;
  69         uint8_t *pQbuffer,*ptmpQbuffer;
  70         int32_t allxfer_len = 0;
  71
  72         if (!capable(CAP_SYS_ADMIN))
  73                 return -EACCES;
  74
  75         /* do message unit read. */
  76         ptmpQbuffer = (uint8_t *)buf;
  77         while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
  78                 && (allxfer_len < 1031)) {
  79                 pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
  80                 memcpy(ptmpQbuffer, pQbuffer, 1);
  81                 acb->rqbuf_firstindex++;
  82                 acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
  83                 ptmpQbuffer++;
  84                 allxfer_len++;
  85         }
  86         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
  87                 struct QBUFFER __iomem * prbuffer = (struct QBUFFER __iomem *)
  88                                         &reg->message_rbuffer;
  89                 uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
  90                 int32_t iop_len;
  91
  92                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
  93                 iop_len = readl(&prbuffer->data_len);
  94                 while (iop_len > 0) {
  95                         acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
  96                         acb->rqbuf_lastindex++;
  97                         acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
  98                         iop_data++;
  99                         iop_len--;
 100                 }
 101                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
 102                                 &reg->inbound_doorbell);
 103         }
 104         return (allxfer_len);
 105 }
 106
 107 static ssize_t
 108 arcmsr_sysfs_iop_message_write(struct kobject *kobj, char *buf, loff_t off,
 109     size_t count)
 110 {
 111         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
 112         struct Scsi_Host *host = class_to_shost(cdev);
 113         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 114         int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
 115         uint8_t *pQbuffer, *ptmpuserbuffer;
 116
 117         if (!capable(CAP_SYS_ADMIN))
 118                 return -EACCES;
 119         if (count > 1032)
 120                 return -EINVAL;
 121         /* do message unit write. */
 122         ptmpuserbuffer = (uint8_t *)buf;
 123         user_len = (int32_t)count;
 124         wqbuf_lastindex = acb->wqbuf_lastindex;
 125         wqbuf_firstindex = acb->wqbuf_firstindex;
 126         if (wqbuf_lastindex != wqbuf_firstindex) {
 127                 arcmsr_post_Qbuffer(acb);
 128                 return 0;       /*need retry*/
 129         } else {
 130                 my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
 131                                 &(ARCMSR_MAX_QBUFFER - 1);
 132                 if (my_empty_len >= user_len) {
 133                         while (user_len > 0) {
 134                                 pQbuffer =
 135                                 &acb->wqbuffer[acb->wqbuf_lastindex];
 136                                 memcpy(pQbuffer, ptmpuserbuffer, 1);
 137                                 acb->wqbuf_lastindex++;
 138                                 acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
 139                                 ptmpuserbuffer++;
 140                                 user_len--;
 141                         }
 142                         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
 143                                 acb->acb_flags &=
 144                                         ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
 145                                 arcmsr_post_Qbuffer(acb);
 146                         }
 147                         return count;
 148                 } else {
 149                         return 0;       /*need retry*/
 150                 }
 151         }
 152 }
 153
 154 static ssize_t
 155 arcmsr_sysfs_iop_message_clear(struct kobject *kobj, char *buf, loff_t off,
 156     size_t count)
 157 {
 158         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
 159         struct Scsi_Host *host = class_to_shost(cdev);
 160         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 161         struct MessageUnit __iomem *reg = acb->pmu;
 162         uint8_t *pQbuffer;
 163
 164         if (!capable(CAP_SYS_ADMIN))
 165                 return -EACCES;
 166
 167         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
 168                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
 169                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
 170                                 , &reg->inbound_doorbell);
 171         }
 172         acb->acb_flags |=
 173                 (ACB_F_MESSAGE_WQBUFFER_CLEARED
 174                 | ACB_F_MESSAGE_RQBUFFER_CLEARED
 175                 | ACB_F_MESSAGE_WQBUFFER_READED);
 176         acb->rqbuf_firstindex = 0;
 177         acb->rqbuf_lastindex = 0;
 178         acb->wqbuf_firstindex = 0;
 179         acb->wqbuf_lastindex = 0;
 180         pQbuffer = acb->rqbuffer;
 181         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 182         pQbuffer = acb->wqbuffer;
 183         memset(pQbuffer, 0, sizeof (struct QBUFFER));
 184         return 1;
 185 }
 186
 187 static struct bin_attribute arcmsr_sysfs_message_read_attr = {
 188         .attr = {
 189                 .name = "mu_read",
 190                 .mode = S_IRUSR ,
 191         },
 192         .size = 1032,
 193         .read = arcmsr_sysfs_iop_message_read,
 194 };
 195
 196 static struct bin_attribute arcmsr_sysfs_message_write_attr = {
 197         .attr = {
 198                 .name = "mu_write",
 199                 .mode = S_IWUSR,
 200         },
 201         .size = 1032,
 202         .write = arcmsr_sysfs_iop_message_write,
 203 };
 204
 205 static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
 206         .attr = {
 207                 .name = "mu_clear",
 208                 .mode = S_IWUSR,
 209         },
 210         .size = 1,
 211         .write = arcmsr_sysfs_iop_message_clear,
 212 };
 213
 214 int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
 215 {
 216         struct Scsi_Host *host = acb->host;
 217         int error;
 218
 219         error = sysfs_create_bin_file(&host->shost_classdev.kobj,
 220                                 &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_classdev.kobj,
 226                                 &arcmsr_sysfs_message_write_attr);
 227         if (error) {
 228                 printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
 229                 goto error_bin_file_message_write;
 230         }
 231         error = sysfs_create_bin_file(&host->shost_classdev.kobj,
 232                                 &arcmsr_sysfs_message_clear_attr);
 233         if (error) {
 234                 printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
 235                 goto error_bin_file_message_clear;
 236         }
 237         return 0;
 238 error_bin_file_message_clear:
 239         sysfs_remove_bin_file(&host->shost_classdev.kobj,
 240                                 &arcmsr_sysfs_message_write_attr);
 241 error_bin_file_message_write:
 242         sysfs_remove_bin_file(&host->shost_classdev.kobj,
 243                                 &arcmsr_sysfs_message_read_attr);
 244 error_bin_file_message_read:
 245         return error;
 246 }
 247
 248 void
 249 arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb) {
 250         struct Scsi_Host *host = acb->host;
 251
 252         sysfs_remove_bin_file(&host->shost_classdev.kobj,
 253                                 &arcmsr_sysfs_message_clear_attr);
 254         sysfs_remove_bin_file(&host->shost_classdev.kobj,
 255                                 &arcmsr_sysfs_message_write_attr);
 256         sysfs_remove_bin_file(&host->shost_classdev.kobj,
 257                                 &arcmsr_sysfs_message_read_attr);
 258 }
 259
 260
 261 static ssize_t
 262 arcmsr_attr_host_driver_version(struct class_device *cdev, char *buf) {
 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 class_device *cdev, char *buf) {
 270         struct Scsi_Host *host = class_to_shost(cdev);
 271         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 272         return snprintf(buf, PAGE_SIZE,
 273                         "%4d\n",
 274                         atomic_read(&acb->ccboutstandingcount));
 275 }
 276
 277 static ssize_t
 278 arcmsr_attr_host_driver_reset(struct class_device *cdev, char *buf) {
 279         struct Scsi_Host *host = class_to_shost(cdev);
 280         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 281         return snprintf(buf, PAGE_SIZE,
 282                         "%4d\n",
 283                         acb->num_resets);
 284 }
 285
 286 static ssize_t
 287 arcmsr_attr_host_driver_abort(struct class_device *cdev, char *buf) {
 288         struct Scsi_Host *host = class_to_shost(cdev);
 289         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 290         return snprintf(buf, PAGE_SIZE,
 291                         "%4d\n",
 292                         acb->num_aborts);
 293 }
 294
 295 static ssize_t
 296 arcmsr_attr_host_fw_model(struct class_device *cdev, char *buf) {
 297     struct Scsi_Host *host = class_to_shost(cdev);
 298         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 299         return snprintf(buf, PAGE_SIZE,
 300                         "%s\n",
 301                         acb->firm_model);
 302 }
 303
 304 static ssize_t
 305 arcmsr_attr_host_fw_version(struct class_device *cdev, char *buf) {
 306         struct Scsi_Host *host = class_to_shost(cdev);
 307         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 308
 309         return snprintf(buf, PAGE_SIZE,
 310                         "%s\n",
 311                         acb->firm_version);
 312 }
 313
 314 static ssize_t
 315 arcmsr_attr_host_fw_request_len(struct class_device *cdev, char *buf) {
 316         struct Scsi_Host *host = class_to_shost(cdev);
 317         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 318
 319         return snprintf(buf, PAGE_SIZE,
 320                         "%4d\n",
 321                         acb->firm_request_len);
 322 }
 323
 324 static ssize_t
 325 arcmsr_attr_host_fw_numbers_queue(struct class_device *cdev, char *buf) {
 326         struct Scsi_Host *host = class_to_shost(cdev);
 327         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 328
 329         return snprintf(buf, PAGE_SIZE,
 330                         "%4d\n",
 331                         acb->firm_numbers_queue);
 332 }
 333
 334 static ssize_t
 335 arcmsr_attr_host_fw_sdram_size(struct class_device *cdev, char *buf) {
 336         struct Scsi_Host *host = class_to_shost(cdev);
 337         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 338
 339         return snprintf(buf, PAGE_SIZE,
 340                         "%4d\n",
 341                         acb->firm_sdram_size);
 342 }
 343
 344 static ssize_t
 345 arcmsr_attr_host_fw_hd_channels(struct class_device *cdev, char *buf) {
 346         struct Scsi_Host *host = class_to_shost(cdev);
 347         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
 348
 349         return snprintf(buf, PAGE_SIZE,
 350                         "%4d\n",
 351                         acb->firm_hd_channels);
 352 }
 353
 354 static CLASS_DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
 355 static CLASS_DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
 356 static CLASS_DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
 357 static CLASS_DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
 358 static CLASS_DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
 359 static CLASS_DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
 360 static CLASS_DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
 361 static CLASS_DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
 362 static CLASS_DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
 363 static CLASS_DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
 364
 365 struct class_device_attribute *arcmsr_host_attrs[] = {
 366         &class_device_attr_host_driver_version,
 367         &class_device_attr_host_driver_posted_cmd,
 368         &class_device_attr_host_driver_reset,
 369         &class_device_attr_host_driver_abort,
 370         &class_device_attr_host_fw_model,
 371         &class_device_attr_host_fw_version,
 372         &class_device_attr_host_fw_request_len,
 373         &class_device_attr_host_fw_numbers_queue,
 374         &class_device_attr_host_fw_sdram_size,
 375         &class_device_attr_host_fw_hd_channels,
 376         NULL,
 377 };