1 files changed, 371 insertions, 0 deletions

diff --git a/drivers/staging/unisys/visorutil/easyproc.c b/drivers/staging/unisys/visorutil/easyproc.c
new file mode 100644
index 0000000..60b6b83
--- /dev/null
+++ b/drivers/staging/unisys/visorutil/easyproc.c
@@ -0,0 +1,371 @@
+/* Copyright © 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ */
+
+/** @file *********************************************************************
+ *
+ *  Handle procfs-specific tasks.
+ *  Note that this file does not know about any module-specific things, nor
+ *  does it know anything about what information to reveal as part of the proc
+ *  entries.  The 2 functions that take care of displaying device and
+ *  driver specific information are passed as parameters to
+ *  visor_easyproc_InitDriver().
+ *
+ *      void show_device_info(struct seq_file *seq, void *p);
+ *      void show_driver_info(struct seq_file *seq);
+ *
+ *  The second parameter to show_device_info is actually a pointer to the
+ *  device-specific info to show.  It is the context that was originally
+ *  passed to visor_easyproc_InitDevice().
+ *
+ ******************************************************************************
+ */
+
+#include <linux/proc_fs.h>
+
+#include "uniklog.h"
+#include "timskmod.h"
+#include "easyproc.h"
+
+#define MYDRVNAME "easyproc"
+
+
+
+/*
+ *   /proc/<ProcId>                              ProcDir
+ *   /proc/<ProcId>/driver                       ProcDriverDir
+ *   /proc/<ProcId>/driver/diag                  ProcDriverDiagFile
+ *   /proc/<ProcId>/device                       ProcDeviceDir
+ *   /proc/<ProcId>/device/0                     procDevicexDir
+ *   /proc/<ProcId>/device/0/diag                procDevicexDiagFile
+ */
+
+
+static ssize_t proc_write_device(struct file *file, const char __user *buffer,
+				 size_t count, loff_t *ppos);
+static ssize_t proc_write_driver(struct file *file, const char __user *buffer,
+				 size_t count, loff_t *ppos);
+
+static struct proc_dir_entry *
+	createProcDir(char *name, struct proc_dir_entry *parent)
+{
+	struct proc_dir_entry *p = proc_mkdir_mode(name, S_IFDIR, parent);
+	if (p == NULL)
+		ERRDRV("failed to create /proc directory %s", name);
+	return p;
+}
+
+static int seq_show_driver(struct seq_file *seq, void *offset);
+static int proc_open_driver(struct inode *inode, struct file *file)
+{
+	return single_open(file, seq_show_driver, PDE_DATA(inode));
+}
+static const struct file_operations proc_fops_driver = {
+	.open = proc_open_driver,
+	.read = seq_read,
+	.write = proc_write_driver,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static int seq_show_device(struct seq_file *seq, void *offset);
+static int seq_show_device_property(struct seq_file *seq, void *offset);
+static int proc_open_device(struct inode *inode, struct file *file)
+{
+	return single_open(file, seq_show_device, PDE_DATA(inode));
+}
+static const struct file_operations proc_fops_device = {
+	.open = proc_open_device,
+	.read = seq_read,
+	.write = proc_write_device,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+static int proc_open_device_property(struct inode *inode, struct file *file)
+{
+	return single_open(file, seq_show_device_property, PDE_DATA(inode));
+}
+static const struct file_operations proc_fops_device_property = {
+	.open = proc_open_device_property,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+
+
+void visor_easyproc_InitDriver(struct easyproc_driver_info *pdriver,
+			       char *procId,
+			       void (*show_driver_info)(struct seq_file *),
+			       void (*show_device_info)(struct seq_file *,
+							void *))
+{
+	memset(pdriver, 0, sizeof(struct easyproc_driver_info));
+	pdriver->ProcId = procId;
+	if (pdriver->ProcId == NULL)
+		ERRDRV("ProcId cannot be NULL (trouble ahead)!");
+	pdriver->Show_driver_info = show_driver_info;
+	pdriver->Show_device_info = show_device_info;
+	if (pdriver->ProcDir == NULL)
+		pdriver->ProcDir = createProcDir(pdriver->ProcId, NULL);
+	if ((pdriver->ProcDir != NULL) && (pdriver->ProcDriverDir == NULL))
+		pdriver->ProcDriverDir = createProcDir("driver",
+						       pdriver->ProcDir);
+	if ((pdriver->ProcDir != NULL) && (pdriver->ProcDeviceDir == NULL))
+		pdriver->ProcDeviceDir = createProcDir("device",
+						       pdriver->ProcDir);
+	if ((pdriver->ProcDriverDir != NULL) &&
+	    (pdriver->ProcDriverDiagFile == NULL)) {
+		pdriver->ProcDriverDiagFile =
+			proc_create_data("diag", 0,
+					 pdriver->ProcDriverDir,
+					 &proc_fops_driver, pdriver);
+		if (pdriver->ProcDriverDiagFile == NULL)
+			ERRDRV("failed to register /proc/%s/driver/diag entry",
+			       pdriver->ProcId);
+	}
+}
+EXPORT_SYMBOL_GPL(visor_easyproc_InitDriver);
+
+
+
+void visor_easyproc_InitDriverEx(struct easyproc_driver_info *pdriver,
+				 char *procId,
+				 void (*show_driver_info)(struct seq_file *),
+				 void (*show_device_info)(struct seq_file *,
+							  void *),
+				 void (*write_driver_info)(char *buf,
+							   size_t count,
+							   loff_t *ppos),
+				 void (*write_device_info)(char *buf,
+							   size_t count,
+							   loff_t *ppos,
+							   void *p))
+{
+	visor_easyproc_InitDriver(pdriver, procId,
+				  show_driver_info, show_device_info);
+	pdriver->Write_driver_info = write_driver_info;
+	pdriver->Write_device_info = write_device_info;
+}
+EXPORT_SYMBOL_GPL(visor_easyproc_InitDriverEx);
+
+
+
+void visor_easyproc_DeInitDriver(struct easyproc_driver_info *pdriver)
+{
+	if (pdriver->ProcDriverDiagFile != NULL) {
+		remove_proc_entry("diag", pdriver->ProcDriverDir);
+		pdriver->ProcDriverDiagFile = NULL;
+	}
+	if (pdriver->ProcDriverDir != NULL) {
+		remove_proc_entry("driver", pdriver->ProcDir);
+		pdriver->ProcDriverDir = NULL;
+	}
+	if (pdriver->ProcDeviceDir != NULL) {
+		remove_proc_entry("device", pdriver->ProcDir);
+		pdriver->ProcDeviceDir = NULL;
+	}
+	if (pdriver->ProcDir != NULL) {
+		remove_proc_entry(pdriver->ProcId, NULL);
+		pdriver->ProcDir = NULL;
+	}
+	pdriver->ProcId = NULL;
+	pdriver->Show_driver_info = NULL;
+	pdriver->Show_device_info = NULL;
+	pdriver->Write_driver_info = NULL;
+	pdriver->Write_device_info = NULL;
+}
+EXPORT_SYMBOL_GPL(visor_easyproc_DeInitDriver);
+
+
+
+void visor_easyproc_InitDevice(struct easyproc_driver_info *pdriver,
+			       struct easyproc_device_info *p, int devno,
+			       void *devdata)
+{
+	if ((pdriver->ProcDeviceDir != NULL) && (p->procDevicexDir == NULL)) {
+		char s[29];
+		sprintf(s, "%d", devno);
+		p->procDevicexDir = createProcDir(s, pdriver->ProcDeviceDir);
+		p->devno = devno;
+	}
+	p->devdata = devdata;
+	p->pdriver = pdriver;
+	p->devno = devno;
+	if ((p->procDevicexDir != NULL) && (p->procDevicexDiagFile == NULL)) {
+		p->procDevicexDiagFile =
+			proc_create_data("diag", 0, p->procDevicexDir,
+					 &proc_fops_device, p);
+		if (p->procDevicexDiagFile == NULL)
+			ERRDEVX(devno, "failed to register /proc/%s/device/%d/diag entry",
+				pdriver->ProcId, devno
+			       );
+	}
+	memset(&(p->device_property_info[0]), 0,
+	       sizeof(p->device_property_info));
+}
+EXPORT_SYMBOL_GPL(visor_easyproc_InitDevice);
+
+
+
+void visor_easyproc_CreateDeviceProperty(struct easyproc_device_info *p,
+					 void (*show_property_info)
+					 (struct seq_file *, void *),
+					 char *property_name)
+{
+	size_t i;
+	struct easyproc_device_property_info *px = NULL;
+
+	if (p->procDevicexDir == NULL) {
+		ERRDRV("state error");
+		return;
+	}
+	for (i = 0; i < ARRAY_SIZE(p->device_property_info); i++) {
+		if (p->device_property_info[i].procEntry == NULL) {
+			px = &(p->device_property_info[i]);
+			break;
+		}
+	}
+	if (!px) {
+		ERRDEVX(p->devno, "too many device properties");
+		return;
+	}
+	px->devdata = p->devdata;
+	px->pdriver = p->pdriver;
+	px->procEntry = proc_create_data(property_name, 0, p->procDevicexDir,
+					 &proc_fops_device_property, px);
+	if (strlen(property_name)+1 > sizeof(px->property_name)) {
+		ERRDEVX(p->devno, "device property name %s too long",
+			property_name);
+		return;
+	}
+	strcpy(px->property_name, property_name);
+	if (px->procEntry == NULL) {
+		ERRDEVX(p->devno, "failed to register /proc/%s/device/%d/%s entry",
+			p->pdriver->ProcId, p->devno, property_name
+		       );
+		return;
+	}
+	px->show_device_property_info = show_property_info;
+}
+EXPORT_SYMBOL_GPL(visor_easyproc_CreateDeviceProperty);
+
+
+
+void visor_easyproc_DeInitDevice(struct easyproc_driver_info *pdriver,
+				 struct easyproc_device_info *p, int devno)
+{
+	size_t i;
+	for (i = 0; i < ARRAY_SIZE(p->device_property_info); i++) {
+		if (p->device_property_info[i].procEntry != NULL) {
+			struct easyproc_device_property_info *px =
+				&(p->device_property_info[i]);
+			remove_proc_entry(px->property_name, p->procDevicexDir);
+			px->procEntry = NULL;
+		}
+	}
+	if (p->procDevicexDiagFile != NULL) {
+		remove_proc_entry("diag", p->procDevicexDir);
+		p->procDevicexDiagFile = NULL;
+	}
+	if (p->procDevicexDir != NULL) {
+		char s[29];
+		sprintf(s, "%d", devno);
+		remove_proc_entry(s, pdriver->ProcDeviceDir);
+		p->procDevicexDir = NULL;
+	}
+	p->devdata = NULL;
+	p->pdriver = NULL;
+}
+EXPORT_SYMBOL_GPL(visor_easyproc_DeInitDevice);
+
+
+
+static int seq_show_driver(struct seq_file *seq, void *offset)
+{
+	struct easyproc_driver_info *p =
+		(struct easyproc_driver_info *)(seq->private);
+	if (!p)
+		return 0;
+	(*(p->Show_driver_info))(seq);
+	return 0;
+}
+
+
+
+static int seq_show_device(struct seq_file *seq, void *offset)
+{
+	struct easyproc_device_info *p =
+		(struct easyproc_device_info *)(seq->private);
+	if ((!p) || (!(p->pdriver)))
+		return 0;
+	(*(p->pdriver->Show_device_info))(seq, p->devdata);
+	return 0;
+}
+
+
+
+static int seq_show_device_property(struct seq_file *seq, void *offset)
+{
+	struct easyproc_device_property_info *p =
+		(struct easyproc_device_property_info *)(seq->private);
+	if ((!p) || (!(p->show_device_property_info)))
+		return 0;
+	(*(p->show_device_property_info))(seq, p->devdata);
+	return 0;
+}
+
+
+
+static ssize_t proc_write_driver(struct file *file, const char __user *buffer,
+				 size_t count, loff_t *ppos)
+{
+	struct seq_file *seq = (struct seq_file *)file->private_data;
+	struct easyproc_driver_info *p = NULL;
+	char local_buf[256];
+	if (seq == NULL)
+		return 0;
+	p = (struct easyproc_driver_info *)(seq->private);
+	if ((!p) || (!(p->Write_driver_info)))
+		return 0;
+	if (count >= sizeof(local_buf))
+		return -ENOMEM;
+	if (copy_from_user(local_buf, buffer, count))
+		return -EFAULT;
+	local_buf[count] = '\0';  /* be friendly */
+	(*(p->Write_driver_info))(local_buf, count, ppos);
+	return count;
+}
+
+
+
+static ssize_t proc_write_device(struct file *file, const char __user *buffer,
+				 size_t count, loff_t *ppos)
+{
+	struct seq_file *seq = (struct seq_file *)file->private_data;
+	struct easyproc_device_info *p = NULL;
+	char local_buf[256];
+	if (seq == NULL)
+		return 0;
+	p = (struct easyproc_device_info *)(seq->private);
+	if ((!p) || (!(p->pdriver)) || (!(p->pdriver->Write_device_info)))
+		return 0;
+	if (count >= sizeof(local_buf))
+		return -ENOMEM;
+	if (copy_from_user(local_buf, buffer, count))
+		return -EFAULT;
+	local_buf[count] = '\0';  /* be friendly */
+	(*(p->pdriver->Write_device_info))(local_buf, count, ppos, p->devdata);
+	return count;
+}