1 files changed, 459 insertions, 0 deletions
diff --git a/drivers/misc/mic/host/mic_sysfs.c b/drivers/misc/mic/host/mic_sysfs.c
new file mode 100644
index 000000000000..6dd864e4a617
--- /dev/null
+++ b/drivers/misc/mic/host/mic_sysfs.c
@@ -0,0 +1,459 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/pci.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+
+/*
+ * A state-to-string lookup table, for exposing a human readable state
+ * via sysfs. Always keep in sync with enum mic_states
+ */
+static const char * const mic_state_string[] = {
+	[MIC_OFFLINE] = "offline",
+	[MIC_ONLINE] = "online",
+	[MIC_SHUTTING_DOWN] = "shutting_down",
+	[MIC_RESET_FAILED] = "reset_failed",
+	[MIC_SUSPENDING] = "suspending",
+	[MIC_SUSPENDED] = "suspended",
+};
+
+/*
+ * A shutdown-status-to-string lookup table, for exposing a human
+ * readable state via sysfs. Always keep in sync with enum mic_shutdown_status
+ */
+static const char * const mic_shutdown_status_string[] = {
+	[MIC_NOP] = "nop",
+	[MIC_CRASHED] = "crashed",
+	[MIC_HALTED] = "halted",
+	[MIC_POWER_OFF] = "poweroff",
+	[MIC_RESTART] = "restart",
+};
+
+void mic_set_shutdown_status(struct mic_device *mdev, u8 shutdown_status)
+{
+	dev_dbg(mdev->sdev->parent, "Shutdown Status %s -> %s\n",
+		mic_shutdown_status_string[mdev->shutdown_status],
+		mic_shutdown_status_string[shutdown_status]);
+	mdev->shutdown_status = shutdown_status;
+}
+
+void mic_set_state(struct mic_device *mdev, u8 state)
+{
+	dev_dbg(mdev->sdev->parent, "State %s -> %s\n",
+		mic_state_string[mdev->state],
+		mic_state_string[state]);
+	mdev->state = state;
+	sysfs_notify_dirent(mdev->state_sysfs);
+}
+
+static ssize_t
+family_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	static const char x100[] = "x100";
+	static const char unknown[] = "Unknown";
+	const char *card = NULL;
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	switch (mdev->family) {
+	case MIC_FAMILY_X100:
+		card = x100;
+		break;
+	default:
+		card = unknown;
+		break;
+	}
+	return scnprintf(buf, PAGE_SIZE, "%s\n", card);
+}
+static DEVICE_ATTR_RO(family);
+
+static ssize_t
+stepping_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	char *string = "??";
+
+	if (!mdev)
+		return -EINVAL;
+
+	switch (mdev->stepping) {
+	case MIC_A0_STEP:
+		string = "A0";
+		break;
+	case MIC_B0_STEP:
+		string = "B0";
+		break;
+	case MIC_B1_STEP:
+		string = "B1";
+		break;
+	case MIC_C0_STEP:
+		string = "C0";
+		break;
+	default:
+		break;
+	}
+	return scnprintf(buf, PAGE_SIZE, "%s\n", string);
+}
+static DEVICE_ATTR_RO(stepping);
+
+static ssize_t
+state_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev || mdev->state >= MIC_LAST)
+		return -EINVAL;
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n",
+		mic_state_string[mdev->state]);
+}
+
+static ssize_t
+state_store(struct device *dev, struct device_attribute *attr,
+	    const char *buf, size_t count)
+{
+	int rc = 0;
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	if (!mdev)
+		return -EINVAL;
+	if (sysfs_streq(buf, "boot")) {
+		rc = mic_start(mdev, buf);
+		if (rc) {
+			dev_err(mdev->sdev->parent,
+				"mic_boot failed rc %d\n", rc);
+			count = rc;
+		}
+		goto done;
+	}
+
+	if (sysfs_streq(buf, "reset")) {
+		schedule_work(&mdev->reset_trigger_work);
+		goto done;
+	}
+
+	if (sysfs_streq(buf, "shutdown")) {
+		mic_shutdown(mdev);
+		goto done;
+	}
+
+	if (sysfs_streq(buf, "suspend")) {
+		mic_suspend(mdev);
+		goto done;
+	}
+
+	count = -EINVAL;
+done:
+	return count;
+}
+static DEVICE_ATTR_RW(state);
+
+static ssize_t shutdown_status_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev || mdev->shutdown_status >= MIC_STATUS_LAST)
+		return -EINVAL;
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n",
+		mic_shutdown_status_string[mdev->shutdown_status]);
+}
+static DEVICE_ATTR_RO(shutdown_status);
+
+static ssize_t
+cmdline_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	char *cmdline;
+
+	if (!mdev)
+		return -EINVAL;
+
+	cmdline = mdev->cmdline;
+
+	if (cmdline)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", cmdline);
+	return 0;
+}
+
+static ssize_t
+cmdline_store(struct device *dev, struct device_attribute *attr,
+	      const char *buf, size_t count)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	mutex_lock(&mdev->mic_mutex);
+	kfree(mdev->cmdline);
+
+	mdev->cmdline = kmalloc(count + 1, GFP_KERNEL);
+	if (!mdev->cmdline) {
+		count = -ENOMEM;
+		goto unlock;
+	}
+
+	strncpy(mdev->cmdline, buf, count);
+
+	if (mdev->cmdline[count - 1] == '\n')
+		mdev->cmdline[count - 1] = '\0';
+	else
+		mdev->cmdline[count] = '\0';
+unlock:
+	mutex_unlock(&mdev->mic_mutex);
+	return count;
+}
+static DEVICE_ATTR_RW(cmdline);
+
+static ssize_t
+firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	char *firmware;
+
+	if (!mdev)
+		return -EINVAL;
+
+	firmware = mdev->firmware;
+
+	if (firmware)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", firmware);
+	return 0;
+}
+
+static ssize_t
+firmware_store(struct device *dev, struct device_attribute *attr,
+	       const char *buf, size_t count)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	mutex_lock(&mdev->mic_mutex);
+	kfree(mdev->firmware);
+
+	mdev->firmware = kmalloc(count + 1, GFP_KERNEL);
+	if (!mdev->firmware) {
+		count = -ENOMEM;
+		goto unlock;
+	}
+	strncpy(mdev->firmware, buf, count);
+
+	if (mdev->firmware[count - 1] == '\n')
+		mdev->firmware[count - 1] = '\0';
+	else
+		mdev->firmware[count] = '\0';
+unlock:
+	mutex_unlock(&mdev->mic_mutex);
+	return count;
+}
+static DEVICE_ATTR_RW(firmware);
+
+static ssize_t
+ramdisk_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	char *ramdisk;
+
+	if (!mdev)
+		return -EINVAL;
+
+	ramdisk = mdev->ramdisk;
+
+	if (ramdisk)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", ramdisk);
+	return 0;
+}
+
+static ssize_t
+ramdisk_store(struct device *dev, struct device_attribute *attr,
+	      const char *buf, size_t count)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	mutex_lock(&mdev->mic_mutex);
+	kfree(mdev->ramdisk);
+
+	mdev->ramdisk = kmalloc(count + 1, GFP_KERNEL);
+	if (!mdev->ramdisk) {
+		count = -ENOMEM;
+		goto unlock;
+	}
+
+	strncpy(mdev->ramdisk, buf, count);
+
+	if (mdev->ramdisk[count - 1] == '\n')
+		mdev->ramdisk[count - 1] = '\0';
+	else
+		mdev->ramdisk[count] = '\0';
+unlock:
+	mutex_unlock(&mdev->mic_mutex);
+	return count;
+}
+static DEVICE_ATTR_RW(ramdisk);
+
+static ssize_t
+bootmode_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	char *bootmode;
+
+	if (!mdev)
+		return -EINVAL;
+
+	bootmode = mdev->bootmode;
+
+	if (bootmode)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", bootmode);
+	return 0;
+}
+
+static ssize_t
+bootmode_store(struct device *dev, struct device_attribute *attr,
+	       const char *buf, size_t count)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	if (!sysfs_streq(buf, "linux") && !sysfs_streq(buf, "elf"))
+		return -EINVAL;
+
+	mutex_lock(&mdev->mic_mutex);
+	kfree(mdev->bootmode);
+
+	mdev->bootmode = kmalloc(count + 1, GFP_KERNEL);
+	if (!mdev->bootmode) {
+		count = -ENOMEM;
+		goto unlock;
+	}
+
+	strncpy(mdev->bootmode, buf, count);
+
+	if (mdev->bootmode[count - 1] == '\n')
+		mdev->bootmode[count - 1] = '\0';
+	else
+		mdev->bootmode[count] = '\0';
+unlock:
+	mutex_unlock(&mdev->mic_mutex);
+	return count;
+}
+static DEVICE_ATTR_RW(bootmode);
+
+static ssize_t
+log_buf_addr_show(struct device *dev, struct device_attribute *attr,
+		  char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_addr);
+}
+
+static ssize_t
+log_buf_addr_store(struct device *dev, struct device_attribute *attr,
+		   const char *buf, size_t count)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	int ret;
+	unsigned long addr;
+
+	if (!mdev)
+		return -EINVAL;
+
+	ret = kstrtoul(buf, 16, &addr);
+	if (ret)
+		goto exit;
+
+	mdev->log_buf_addr = (void *)addr;
+	ret = count;
+exit:
+	return ret;
+}
+static DEVICE_ATTR_RW(log_buf_addr);
+
+static ssize_t
+log_buf_len_show(struct device *dev, struct device_attribute *attr,
+		 char *buf)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+	if (!mdev)
+		return -EINVAL;
+
+	return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_len);
+}
+
+static ssize_t
+log_buf_len_store(struct device *dev, struct device_attribute *attr,
+		  const char *buf, size_t count)
+{
+	struct mic_device *mdev = dev_get_drvdata(dev->parent);
+	int ret;
+	unsigned long addr;
+
+	if (!mdev)
+		return -EINVAL;
+
+	ret = kstrtoul(buf, 16, &addr);
+	if (ret)
+		goto exit;
+
+	mdev->log_buf_len = (int *)addr;
+	ret = count;
+exit:
+	return ret;
+}
+static DEVICE_ATTR_RW(log_buf_len);
+
+static struct attribute *mic_default_attrs[] = {
+	&dev_attr_family.attr,
+	&dev_attr_stepping.attr,
+	&dev_attr_state.attr,
+	&dev_attr_shutdown_status.attr,
+	&dev_attr_cmdline.attr,
+	&dev_attr_firmware.attr,
+	&dev_attr_ramdisk.attr,
+	&dev_attr_bootmode.attr,
+	&dev_attr_log_buf_addr.attr,
+	&dev_attr_log_buf_len.attr,
+
+	NULL
+};
+
+ATTRIBUTE_GROUPS(mic_default);
+
+void mic_sysfs_init(struct mic_device *mdev)
+{
+	mdev->attr_group = mic_default_groups;
+}