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path: root/drivers/staging/unisys/visorchipset/file.c
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Diffstat (limited to 'drivers/staging/unisys/visorchipset/file.c')
-rw-r--r--drivers/staging/unisys/visorchipset/file.c122
1 files changed, 46 insertions, 76 deletions
diff --git a/drivers/staging/unisys/visorchipset/file.c b/drivers/staging/unisys/visorchipset/file.c
index 373fa36b7119..e51fd4e3fa2d 100644
--- a/drivers/staging/unisys/visorchipset/file.c
+++ b/drivers/staging/unisys/visorchipset/file.c
@@ -28,85 +28,75 @@
#define CURRENT_FILE_PC VISOR_CHIPSET_PC_file_c
-static struct cdev Cdev;
-static VISORCHANNEL **PControlVm_channel;
-static dev_t MajorDev = -1; /**< indicates major num for device */
-static BOOL Registered = FALSE;
+static struct cdev file_cdev;
+static struct visorchannel **file_controlvm_channel;
+static dev_t majordev = -1; /**< indicates major num for device */
+static BOOL registered = FALSE;
static int visorchipset_open(struct inode *inode, struct file *file);
static int visorchipset_release(struct inode *inode, struct file *file);
static int visorchipset_mmap(struct file *file, struct vm_area_struct *vma);
-#ifdef HAVE_UNLOCKED_IOCTL
long visorchipset_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-#else
-int visorchipset_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg);
-#endif
static const struct file_operations visorchipset_fops = {
.owner = THIS_MODULE,
.open = visorchipset_open,
.read = NULL,
.write = NULL,
-#ifdef HAVE_UNLOCKED_IOCTL
.unlocked_ioctl = visorchipset_ioctl,
-#else
- .ioctl = visorchipset_ioctl,
-#endif
.release = visorchipset_release,
.mmap = visorchipset_mmap,
};
int
-visorchipset_file_init(dev_t majorDev, VISORCHANNEL **pControlVm_channel)
+visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
{
- int rc = -1;
+ int rc = 0;
- PControlVm_channel = pControlVm_channel;
- MajorDev = majorDev;
- cdev_init(&Cdev, &visorchipset_fops);
- Cdev.owner = THIS_MODULE;
- if (MAJOR(MajorDev) == 0) {
+ file_controlvm_channel = controlvm_channel;
+ majordev = major_dev;
+ cdev_init(&file_cdev, &visorchipset_fops);
+ file_cdev.owner = THIS_MODULE;
+ if (MAJOR(majordev) == 0) {
/* dynamic major device number registration required */
- if (alloc_chrdev_region(&MajorDev, 0, 1, MYDRVNAME) < 0) {
+ if (alloc_chrdev_region(&majordev, 0, 1, MYDRVNAME) < 0) {
ERRDRV("Unable to allocate+register char device %s",
MYDRVNAME);
- goto Away;
+ return -1;
}
- Registered = TRUE;
- INFODRV("New major number %d registered\n", MAJOR(MajorDev));
+ registered = TRUE;
+ INFODRV("New major number %d registered\n", MAJOR(majordev));
} else {
/* static major device number registration required */
- if (register_chrdev_region(MajorDev, 1, MYDRVNAME) < 0) {
+ if (register_chrdev_region(majordev, 1, MYDRVNAME) < 0) {
ERRDRV("Unable to register char device %s", MYDRVNAME);
- goto Away;
+ return -1;
}
- Registered = TRUE;
- INFODRV("Static major number %d registered\n", MAJOR(MajorDev));
+ registered = TRUE;
+ INFODRV("Static major number %d registered\n", MAJOR(majordev));
}
- if (cdev_add(&Cdev, MKDEV(MAJOR(MajorDev), 0), 1) < 0) {
+ rc = cdev_add(&file_cdev, MKDEV(MAJOR(majordev), 0), 1);
+ if (rc < 0) {
ERRDRV("failed to create char device: (status=%d)\n", rc);
- goto Away;
+ return -1;
}
INFODRV("Registered char device for %s (major=%d)",
- MYDRVNAME, MAJOR(MajorDev));
- rc = 0;
-Away:
- return rc;
+ MYDRVNAME, MAJOR(majordev));
+ return 0;
}
void
visorchipset_file_cleanup(void)
{
- if (Cdev.ops != NULL)
- cdev_del(&Cdev);
- Cdev.ops = NULL;
- if (Registered) {
- if (MAJOR(MajorDev) >= 0) {
- unregister_chrdev_region(MajorDev, 1);
- MajorDev = MKDEV(0, 0);
+ if (file_cdev.ops != NULL)
+ cdev_del(&file_cdev);
+ file_cdev.ops = NULL;
+ if (registered) {
+ if (MAJOR(majordev) >= 0) {
+ unregister_chrdev_region(majordev, 1);
+ majordev = MKDEV(0, 0);
}
- Registered = FALSE;
+ registered = FALSE;
}
}
@@ -114,17 +104,12 @@ static int
visorchipset_open(struct inode *inode, struct file *file)
{
unsigned minor_number = iminor(inode);
- int rc = -ENODEV;
DEBUGDRV("%s", __func__);
if (minor_number != 0)
- goto Away;
+ return -ENODEV;
file->private_data = NULL;
- rc = 0;
-Away:
- if (rc < 0)
- ERRDRV("%s minor=%d failed", __func__, minor_number);
- return rc;
+ return 0;
}
static int
@@ -137,7 +122,7 @@ visorchipset_release(struct inode *inode, struct file *file)
static int
visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
{
- ulong physAddr = 0;
+ ulong physaddr = 0;
ulong offset = vma->vm_pgoff << PAGE_SHIFT;
GUEST_PHYSICAL_ADDRESS addr = 0;
@@ -150,11 +135,11 @@ visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
switch (offset) {
case VISORCHIPSET_MMAP_CONTROLCHANOFFSET:
vma->vm_flags |= VM_IO;
- if (*PControlVm_channel == NULL) {
+ if (*file_controlvm_channel == NULL) {
ERRDRV("%s no controlvm channel yet", __func__);
return -ENXIO;
}
- visorchannel_read(*PControlVm_channel,
+ visorchannel_read(*file_controlvm_channel,
offsetof(struct spar_controlvm_channel_protocol,
gp_control_channel),
&addr, sizeof(addr));
@@ -162,10 +147,10 @@ visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
ERRDRV("%s control channel address is 0", __func__);
return -ENXIO;
}
- physAddr = (ulong) (addr);
- DEBUGDRV("mapping physical address = 0x%lx", physAddr);
+ physaddr = (ulong)addr;
+ DEBUGDRV("mapping physical address = 0x%lx", physaddr);
if (remap_pfn_range(vma, vma->vm_start,
- physAddr >> PAGE_SHIFT,
+ physaddr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
/*pgprot_noncached */
(vma->vm_page_prot))) {
@@ -180,16 +165,8 @@ visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
return 0;
}
-#ifdef HAVE_UNLOCKED_IOCTL
-long
-visorchipset_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-#else
-int
-visorchipset_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-#endif
+long visorchipset_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- int rc = SUCCESS;
s64 adjustment;
s64 vrtc_offset;
@@ -200,28 +177,21 @@ visorchipset_ioctl(struct inode *inode, struct file *file,
vrtc_offset = issue_vmcall_query_guest_virtual_time_offset();
if (copy_to_user
((void __user *)arg, &vrtc_offset, sizeof(vrtc_offset))) {
- rc = -EFAULT;
- goto Away;
+ return -EFAULT;
}
DBGINF("insde visorchipset_ioctl, cmd=%d, vrtc_offset=%lld",
cmd, vrtc_offset);
- break;
+ return SUCCESS;
case VMCALL_UPDATE_PHYSICAL_TIME:
if (copy_from_user
(&adjustment, (void __user *)arg, sizeof(adjustment))) {
- rc = -EFAULT;
- goto Away;
+ return -EFAULT;
}
DBGINF("insde visorchipset_ioctl, cmd=%d, adjustment=%lld", cmd,
adjustment);
- rc = issue_vmcall_update_physical_time(adjustment);
- break;
+ return issue_vmcall_update_physical_time(adjustment);
default:
LOGERR("visorchipset_ioctl received invalid command");
- rc = -EFAULT;
- break;
+ return -EFAULT;
}
-Away:
- DBGINF("exiting %d!", rc);
- return rc;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.