[PATCH 036/141] staging: unisys: remove file.c and pass functionality to visorchipset
Benjamin Romer
benjamin.romer at unisys.com
Tue May 5 22:36:13 UTC 2015
From: Erik Arfvidson <erik.arfvidson at unisys.com>
This patch trasitions the include files and functions from file.c
and places them into visorchipset_main.c
Signed-off-by: Erik Arfvidson <erik.arfvidson at unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer at unisys.com>
---
drivers/staging/unisys/visorchipset/Makefile | 2 +-
drivers/staging/unisys/visorchipset/file.c | 162 ---------------------
.../unisys/visorchipset/visorchipset_main.c | 136 ++++++++++++++++-
3 files changed, 136 insertions(+), 164 deletions(-)
delete mode 100644 drivers/staging/unisys/visorchipset/file.c
diff --git a/drivers/staging/unisys/visorchipset/Makefile b/drivers/staging/unisys/visorchipset/Makefile
index 1bf6699..6886cb7 100644
--- a/drivers/staging/unisys/visorchipset/Makefile
+++ b/drivers/staging/unisys/visorchipset/Makefile
@@ -4,7 +4,7 @@
obj-$(CONFIG_UNISYS_VISORCHIPSET) += visorchipset.o
-visorchipset-y := visorchipset_main.o file.o parser.o
+visorchipset-y := visorchipset_main.o parser.o
ccflags-y += -Idrivers/staging/unisys/include
ccflags-y += -Idrivers/staging/unisys/uislib
diff --git a/drivers/staging/unisys/visorchipset/file.c b/drivers/staging/unisys/visorchipset/file.c
deleted file mode 100644
index c0bd416..0000000
--- a/drivers/staging/unisys/visorchipset/file.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/* file.c
- *
- * Copyright (C) 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.
- */
-
-/* This contains the implementation that allows a usermode program to
- * communicate with the visorchipset driver using a device/file interface.
- */
-
-#include <linux/fs.h>
-#include <linux/mm.h>
-
-#include "version.h"
-#include "visorchipset.h"
-#include "visorbus.h"
-#include "uisutils.h"
-#include "visorchipset.h"
-
-#define CURRENT_FILE_PC VISOR_CHIPSET_PC_file_c
-
-static struct cdev file_cdev;
-static struct visorchannel **file_controlvm_channel;
-
-void
-visorchipset_file_cleanup(dev_t major_dev)
-{
- if (file_cdev.ops)
- cdev_del(&file_cdev);
- file_cdev.ops = NULL;
- unregister_chrdev_region(major_dev, 1);
-}
-
-static int
-visorchipset_open(struct inode *inode, struct file *file)
-{
- unsigned minor_number = iminor(inode);
-
- if (minor_number)
- return -ENODEV;
- file->private_data = NULL;
- return 0;
-}
-
-static int
-visorchipset_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static int
-visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
-{
- unsigned long physaddr = 0;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- GUEST_PHYSICAL_ADDRESS addr = 0;
-
- /* sv_enable_dfp(); */
- if (offset & (PAGE_SIZE - 1))
- return -ENXIO; /* need aligned offsets */
-
- switch (offset) {
- case VISORCHIPSET_MMAP_CONTROLCHANOFFSET:
- vma->vm_flags |= VM_IO;
- if (!*file_controlvm_channel)
- return -ENXIO;
-
- visorchannel_read(*file_controlvm_channel,
- offsetof(struct spar_controlvm_channel_protocol,
- gp_control_channel),
- &addr, sizeof(addr));
- if (!addr)
- return -ENXIO;
-
- physaddr = (unsigned long)addr;
- if (remap_pfn_range(vma, vma->vm_start,
- physaddr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- /*pgprot_noncached */
- (vma->vm_page_prot))) {
- return -EAGAIN;
- }
- break;
- default:
- return -ENOSYS;
- }
- return 0;
-}
-
-static long visorchipset_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- s64 adjustment;
- s64 vrtc_offset;
-
- switch (cmd) {
- case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET:
- /* get the physical rtc offset */
- vrtc_offset = issue_vmcall_query_guest_virtual_time_offset();
- if (copy_to_user((void __user *)arg, &vrtc_offset,
- sizeof(vrtc_offset))) {
- return -EFAULT;
- }
- return SUCCESS;
- case VMCALL_UPDATE_PHYSICAL_TIME:
- if (copy_from_user(&adjustment, (void __user *)arg,
- sizeof(adjustment))) {
- return -EFAULT;
- }
- return issue_vmcall_update_physical_time(adjustment);
- default:
- return -EFAULT;
- }
-}
-
-static const struct file_operations visorchipset_fops = {
- .owner = THIS_MODULE,
- .open = visorchipset_open,
- .read = NULL,
- .write = NULL,
- .unlocked_ioctl = visorchipset_ioctl,
- .release = visorchipset_release,
- .mmap = visorchipset_mmap,
-};
-
-int
-visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
-{
- int rc = 0;
-
- file_controlvm_channel = controlvm_channel;
- cdev_init(&file_cdev, &visorchipset_fops);
- file_cdev.owner = THIS_MODULE;
- if (MAJOR(major_dev) == 0) {
- rc = alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME);
- /* dynamic major device number registration required */
- if (rc < 0)
- return rc;
- } else {
- /* static major device number registration required */
- rc = register_chrdev_region(major_dev, 1, MYDRVNAME);
- if (rc < 0)
- return rc;
- }
- rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1);
- if (rc < 0) {
- unregister_chrdev_region(major_dev, 1);
- return rc;
- }
- return 0;
-}
diff --git a/drivers/staging/unisys/visorchipset/visorchipset_main.c b/drivers/staging/unisys/visorchipset/visorchipset_main.c
index 34ac17b..d5bd1a1 100644
--- a/drivers/staging/unisys/visorchipset/visorchipset_main.c
+++ b/drivers/staging/unisys/visorchipset/visorchipset_main.c
@@ -16,7 +16,6 @@
*/
#include "version.h"
-#include "visorchipset.h"
#include "procobjecttree.h"
#include "visorbus.h"
#include "periodic_work.h"
@@ -24,7 +23,10 @@
#include "uisutils.h"
#include "controlvmcompletionstatus.h"
#include "guestlinuxdebug.h"
+#include "visorchipset.h"
+#include <linux/fs.h>
+#include <linux/mm.h>
#include <linux/nls.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
@@ -56,6 +58,23 @@ static int visorchipset_testteardown;
static int visorchipset_disable_controlvm;
static int visorchipset_holdchipsetready;
+static int
+visorchipset_open(struct inode *inode, struct file *file)
+{
+ unsigned minor_number = iminor(inode);
+
+ if (minor_number)
+ return -ENODEV;
+ file->private_data = NULL;
+ return 0;
+}
+
+static int
+visorchipset_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
/* When the controlvm channel is idle for at least MIN_IDLE_SECONDS,
* we switch to slow polling mode. As soon as we get a controlvm
* message, we switch back to fast polling mode.
@@ -74,6 +93,8 @@ static struct delayed_work periodic_controlvm_work;
static struct workqueue_struct *periodic_controlvm_workqueue;
static DEFINE_SEMAPHORE(notifier_lock);
+static struct cdev file_cdev;
+static struct visorchannel **file_controlvm_channel;
static struct controlvm_message_header g_chipset_msg_hdr;
static const uuid_le spar_diag_pool_channel_protocol_uuid =
SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID;
@@ -2169,6 +2190,110 @@ static ssize_t deviceenabled_store(struct device *dev,
return count;
}
+static int
+visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ unsigned long physaddr = 0;
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ GUEST_PHYSICAL_ADDRESS addr = 0;
+
+ /* sv_enable_dfp(); */
+ if (offset & (PAGE_SIZE - 1))
+ return -ENXIO; /* need aligned offsets */
+
+ switch (offset) {
+ case VISORCHIPSET_MMAP_CONTROLCHANOFFSET:
+ vma->vm_flags |= VM_IO;
+ if (!*file_controlvm_channel)
+ return -ENXIO;
+
+ visorchannel_read(*file_controlvm_channel,
+ offsetof(struct spar_controlvm_channel_protocol,
+ gp_control_channel),
+ &addr, sizeof(addr));
+ if (!addr)
+ return -ENXIO;
+
+ physaddr = (unsigned long)addr;
+ if (remap_pfn_range(vma, vma->vm_start,
+ physaddr >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ /*pgprot_noncached */
+ (vma->vm_page_prot))) {
+ return -EAGAIN;
+ }
+ break;
+ default:
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static long visorchipset_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ s64 adjustment;
+ s64 vrtc_offset;
+
+ switch (cmd) {
+ case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET:
+ /* get the physical rtc offset */
+ vrtc_offset = issue_vmcall_query_guest_virtual_time_offset();
+ if (copy_to_user((void __user *)arg, &vrtc_offset,
+ sizeof(vrtc_offset))) {
+ return -EFAULT;
+ }
+ return SUCCESS;
+ case VMCALL_UPDATE_PHYSICAL_TIME:
+ if (copy_from_user(&adjustment, (void __user *)arg,
+ sizeof(adjustment))) {
+ return -EFAULT;
+ }
+ return issue_vmcall_update_physical_time(adjustment);
+ default:
+ return -EFAULT;
+ }
+}
+
+static const struct file_operations visorchipset_fops = {
+ .owner = THIS_MODULE,
+ .open = visorchipset_open,
+ .read = NULL,
+ .write = NULL,
+ .unlocked_ioctl = visorchipset_ioctl,
+ .release = visorchipset_release,
+ .mmap = visorchipset_mmap,
+};
+
+int
+visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
+{
+ int rc = 0;
+
+ file_controlvm_channel = controlvm_channel;
+ cdev_init(&file_cdev, &visorchipset_fops);
+ file_cdev.owner = THIS_MODULE;
+ if (MAJOR(major_dev) == 0) {
+ rc = alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME);
+ /* dynamic major device number registration required */
+ if (rc < 0)
+ return rc;
+ } else {
+ /* static major device number registration required */
+ rc = register_chrdev_region(major_dev, 1, MYDRVNAME);
+ if (rc < 0)
+ return rc;
+ }
+ rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1);
+ if (rc < 0) {
+ unregister_chrdev_region(major_dev, 1);
+ return rc;
+ }
+ return 0;
+}
+
+
+
static int __init
visorchipset_init(void)
{
@@ -2262,6 +2387,15 @@ cleanup:
return rc;
}
+void
+visorchipset_file_cleanup(dev_t major_dev)
+{
+ if (file_cdev.ops)
+ cdev_del(&file_cdev);
+ file_cdev.ops = NULL;
+ unregister_chrdev_region(major_dev, 1);
+}
+
static void
visorchipset_exit(void)
{
--
2.1.4
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