412 lines · c
1/*2*******************************************************************************3** O.S : Linux4** FILE NAME : arcmsr_attr.c5** BY : Nick Cheng6** Description: attributes exported to sysfs and device host7*******************************************************************************8** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved9**10** Web site: www.areca.com.tw11** E-mail: support@areca.com.tw12**13** This program is free software; you can redistribute it and/or modify14** it under the terms of the GNU General Public License version 2 as15** 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 of18** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the19** GNU General Public License for more details.20*******************************************************************************21** Redistribution and use in source and binary forms, with or without22** modification, are permitted provided that the following conditions23** are met:24** 1. Redistributions of source code must retain the above copyright25** notice, this list of conditions and the following disclaimer.26** 2. Redistributions in binary form must reproduce the above copyright27** notice, this list of conditions and the following disclaimer in the28** documentation and/or other materials provided with the distribution.29** 3. The name of the author may not be used to endorse or promote products30** derived from this software without specific prior written permission.31**32** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR33** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES34** 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,BUT37** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,38** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY39** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT40** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF41** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.42*******************************************************************************43** For history of changes, see Documentation/scsi/ChangeLog.arcmsr44** Firmware Specification, see Documentation/scsi/arcmsr_spec.rst45*******************************************************************************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 61static 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 108static 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 156static 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_CLEARED174 | ACB_F_MESSAGE_RQBUFFER_CLEARED175 | 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 191static 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 200static 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 209static 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 218int 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;239error_bin_file_message_clear:240 sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);241error_bin_file_message_write:242 sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);243error_bin_file_message_read:244 return error;245}246 247void 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 257static ssize_t258arcmsr_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 266static ssize_t267arcmsr_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 278static ssize_t279arcmsr_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 290static ssize_t291arcmsr_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 302static ssize_t303arcmsr_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 314static ssize_t315arcmsr_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 327static ssize_t328arcmsr_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 340static ssize_t341arcmsr_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 353static ssize_t354arcmsr_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 366static ssize_t367arcmsr_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 379static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);380static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);381static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);382static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);383static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);384static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);385static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);386static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);387static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);388static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);389 390static 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 404static const struct attribute_group arcmsr_host_attr_group = {405 .attrs = arcmsr_host_attrs,406};407 408const struct attribute_group *arcmsr_host_groups[] = {409 &arcmsr_host_attr_group,410 NULL411};412