These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / staging / unisys / visorchipset / file.c

diff --git a/kernel/drivers/staging/unisys/visorchipset/file.c b/kernel/drivers/staging/unisys/visorchipset/file.c
deleted file mode 100644 (file)
index 203de0b..0000000
--- a/kernel/drivers/staging/unisys/visorchipset/file.c
+++ /dev/null
@@ -1,160 +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 "globals.h"
-#include "visorchannel.h"
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include "uisutils.h"
-#include "file.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 != NULL)
-               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 != 0)
-               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)
-{
-       ulong physaddr = 0;
-       ulong 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 == NULL) {
-                       return -ENXIO;
-               }
-               visorchannel_read(*file_controlvm_channel,
-                       offsetof(struct spar_controlvm_channel_protocol,
-                                gp_control_channel),
-                       &addr, sizeof(addr));
-               if (addr == 0) {
-                       return -ENXIO;
-               }
-               physaddr = (ulong)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;
-}