2 * Intel MIC Platform Software Stack (MPSS)
4 * Copyright(c) 2013 Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2, as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * The full GNU General Public License is included in this distribution in
16 * the file called "COPYING".
18 * Intel MIC Host driver.
21 #include <linux/pci.h>
23 #include <linux/mic_common.h>
24 #include "../common/mic_dev.h"
25 #include "mic_device.h"
28 * A state-to-string lookup table, for exposing a human readable state
29 * via sysfs. Always keep in sync with enum mic_states
31 static const char * const mic_state_string[] = {
32 [MIC_OFFLINE] = "offline",
33 [MIC_ONLINE] = "online",
34 [MIC_SHUTTING_DOWN] = "shutting_down",
35 [MIC_RESET_FAILED] = "reset_failed",
36 [MIC_SUSPENDING] = "suspending",
37 [MIC_SUSPENDED] = "suspended",
41 * A shutdown-status-to-string lookup table, for exposing a human
42 * readable state via sysfs. Always keep in sync with enum mic_shutdown_status
44 static const char * const mic_shutdown_status_string[] = {
46 [MIC_CRASHED] = "crashed",
47 [MIC_HALTED] = "halted",
48 [MIC_POWER_OFF] = "poweroff",
49 [MIC_RESTART] = "restart",
52 void mic_set_shutdown_status(struct mic_device *mdev, u8 shutdown_status)
54 dev_dbg(mdev->sdev->parent, "Shutdown Status %s -> %s\n",
55 mic_shutdown_status_string[mdev->shutdown_status],
56 mic_shutdown_status_string[shutdown_status]);
57 mdev->shutdown_status = shutdown_status;
60 void mic_set_state(struct mic_device *mdev, u8 state)
62 dev_dbg(mdev->sdev->parent, "State %s -> %s\n",
63 mic_state_string[mdev->state],
64 mic_state_string[state]);
66 sysfs_notify_dirent(mdev->state_sysfs);
70 family_show(struct device *dev, struct device_attribute *attr, char *buf)
72 static const char x100[] = "x100";
73 static const char unknown[] = "Unknown";
74 const char *card = NULL;
75 struct mic_device *mdev = dev_get_drvdata(dev->parent);
80 switch (mdev->family) {
88 return scnprintf(buf, PAGE_SIZE, "%s\n", card);
90 static DEVICE_ATTR_RO(family);
93 stepping_show(struct device *dev, struct device_attribute *attr, char *buf)
95 struct mic_device *mdev = dev_get_drvdata(dev->parent);
101 switch (mdev->stepping) {
117 return scnprintf(buf, PAGE_SIZE, "%s\n", string);
119 static DEVICE_ATTR_RO(stepping);
122 state_show(struct device *dev, struct device_attribute *attr, char *buf)
124 struct mic_device *mdev = dev_get_drvdata(dev->parent);
126 if (!mdev || mdev->state >= MIC_LAST)
129 return scnprintf(buf, PAGE_SIZE, "%s\n",
130 mic_state_string[mdev->state]);
134 state_store(struct device *dev, struct device_attribute *attr,
135 const char *buf, size_t count)
138 struct mic_device *mdev = dev_get_drvdata(dev->parent);
141 if (sysfs_streq(buf, "boot")) {
142 rc = mic_start(mdev, buf);
144 dev_err(mdev->sdev->parent,
145 "mic_boot failed rc %d\n", rc);
151 if (sysfs_streq(buf, "reset")) {
152 schedule_work(&mdev->reset_trigger_work);
156 if (sysfs_streq(buf, "shutdown")) {
161 if (sysfs_streq(buf, "suspend")) {
170 static DEVICE_ATTR_RW(state);
172 static ssize_t shutdown_status_show(struct device *dev,
173 struct device_attribute *attr, char *buf)
175 struct mic_device *mdev = dev_get_drvdata(dev->parent);
177 if (!mdev || mdev->shutdown_status >= MIC_STATUS_LAST)
180 return scnprintf(buf, PAGE_SIZE, "%s\n",
181 mic_shutdown_status_string[mdev->shutdown_status]);
183 static DEVICE_ATTR_RO(shutdown_status);
186 cmdline_show(struct device *dev, struct device_attribute *attr, char *buf)
188 struct mic_device *mdev = dev_get_drvdata(dev->parent);
194 cmdline = mdev->cmdline;
197 return scnprintf(buf, PAGE_SIZE, "%s\n", cmdline);
202 cmdline_store(struct device *dev, struct device_attribute *attr,
203 const char *buf, size_t count)
205 struct mic_device *mdev = dev_get_drvdata(dev->parent);
210 mutex_lock(&mdev->mic_mutex);
211 kfree(mdev->cmdline);
213 mdev->cmdline = kmalloc(count + 1, GFP_KERNEL);
214 if (!mdev->cmdline) {
219 strncpy(mdev->cmdline, buf, count);
221 if (mdev->cmdline[count - 1] == '\n')
222 mdev->cmdline[count - 1] = '\0';
224 mdev->cmdline[count] = '\0';
226 mutex_unlock(&mdev->mic_mutex);
229 static DEVICE_ATTR_RW(cmdline);
232 firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
234 struct mic_device *mdev = dev_get_drvdata(dev->parent);
240 firmware = mdev->firmware;
243 return scnprintf(buf, PAGE_SIZE, "%s\n", firmware);
248 firmware_store(struct device *dev, struct device_attribute *attr,
249 const char *buf, size_t count)
251 struct mic_device *mdev = dev_get_drvdata(dev->parent);
256 mutex_lock(&mdev->mic_mutex);
257 kfree(mdev->firmware);
259 mdev->firmware = kmalloc(count + 1, GFP_KERNEL);
260 if (!mdev->firmware) {
264 strncpy(mdev->firmware, buf, count);
266 if (mdev->firmware[count - 1] == '\n')
267 mdev->firmware[count - 1] = '\0';
269 mdev->firmware[count] = '\0';
271 mutex_unlock(&mdev->mic_mutex);
274 static DEVICE_ATTR_RW(firmware);
277 ramdisk_show(struct device *dev, struct device_attribute *attr, char *buf)
279 struct mic_device *mdev = dev_get_drvdata(dev->parent);
285 ramdisk = mdev->ramdisk;
288 return scnprintf(buf, PAGE_SIZE, "%s\n", ramdisk);
293 ramdisk_store(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
296 struct mic_device *mdev = dev_get_drvdata(dev->parent);
301 mutex_lock(&mdev->mic_mutex);
302 kfree(mdev->ramdisk);
304 mdev->ramdisk = kmalloc(count + 1, GFP_KERNEL);
305 if (!mdev->ramdisk) {
310 strncpy(mdev->ramdisk, buf, count);
312 if (mdev->ramdisk[count - 1] == '\n')
313 mdev->ramdisk[count - 1] = '\0';
315 mdev->ramdisk[count] = '\0';
317 mutex_unlock(&mdev->mic_mutex);
320 static DEVICE_ATTR_RW(ramdisk);
323 bootmode_show(struct device *dev, struct device_attribute *attr, char *buf)
325 struct mic_device *mdev = dev_get_drvdata(dev->parent);
331 bootmode = mdev->bootmode;
334 return scnprintf(buf, PAGE_SIZE, "%s\n", bootmode);
339 bootmode_store(struct device *dev, struct device_attribute *attr,
340 const char *buf, size_t count)
342 struct mic_device *mdev = dev_get_drvdata(dev->parent);
347 if (!sysfs_streq(buf, "linux") && !sysfs_streq(buf, "elf"))
350 mutex_lock(&mdev->mic_mutex);
351 kfree(mdev->bootmode);
353 mdev->bootmode = kmalloc(count + 1, GFP_KERNEL);
354 if (!mdev->bootmode) {
359 strncpy(mdev->bootmode, buf, count);
361 if (mdev->bootmode[count - 1] == '\n')
362 mdev->bootmode[count - 1] = '\0';
364 mdev->bootmode[count] = '\0';
366 mutex_unlock(&mdev->mic_mutex);
369 static DEVICE_ATTR_RW(bootmode);
372 log_buf_addr_show(struct device *dev, struct device_attribute *attr,
375 struct mic_device *mdev = dev_get_drvdata(dev->parent);
380 return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_addr);
384 log_buf_addr_store(struct device *dev, struct device_attribute *attr,
385 const char *buf, size_t count)
387 struct mic_device *mdev = dev_get_drvdata(dev->parent);
394 ret = kstrtoul(buf, 16, &addr);
398 mdev->log_buf_addr = (void *)addr;
403 static DEVICE_ATTR_RW(log_buf_addr);
406 log_buf_len_show(struct device *dev, struct device_attribute *attr,
409 struct mic_device *mdev = dev_get_drvdata(dev->parent);
414 return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_len);
418 log_buf_len_store(struct device *dev, struct device_attribute *attr,
419 const char *buf, size_t count)
421 struct mic_device *mdev = dev_get_drvdata(dev->parent);
428 ret = kstrtoul(buf, 16, &addr);
432 mdev->log_buf_len = (int *)addr;
437 static DEVICE_ATTR_RW(log_buf_len);
439 static struct attribute *mic_default_attrs[] = {
440 &dev_attr_family.attr,
441 &dev_attr_stepping.attr,
442 &dev_attr_state.attr,
443 &dev_attr_shutdown_status.attr,
444 &dev_attr_cmdline.attr,
445 &dev_attr_firmware.attr,
446 &dev_attr_ramdisk.attr,
447 &dev_attr_bootmode.attr,
448 &dev_attr_log_buf_addr.attr,
449 &dev_attr_log_buf_len.attr,
454 ATTRIBUTE_GROUPS(mic_default);
456 void mic_sysfs_init(struct mic_device *mdev)
458 mdev->attr_group = mic_default_groups;