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staging: unisys: added virthba enable_ints entry

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This patch adds enable_ints entry to virthba directory

Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Erik Arfvidson 2014-07-21 14:47:45 -04:00 committed by Greg Kroah-Hartman
parent 5d1501913b
commit 79014eb1f2
1 changed files with 63 additions and 0 deletions
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63
drivers/staging/unisys/virthba/virthba.c
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@ -112,6 +112,8 @@ static void doDiskAddRemove(struct work_struct *work);
static void virthba_serverdown_complete(struct work_struct *work);
static ssize_t info_debugfs_read(struct file *file, char __user *buf,
size_t len, loff_t *offset);
static ssize_t enable_ints_write(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos);
/*****************************************************/
/* Globals */
@ -233,6 +235,10 @@ static const struct file_operations debugfs_info_fops = {
.read = info_debugfs_read,
};
static const struct file_operations debugfs_enable_ints_fops = {
.write = enable_ints_write,
};
/*****************************************************/
/* Structs */
/*****************************************************/
@ -1415,6 +1421,60 @@ static ssize_t info_debugfs_read(struct file *file,
return bytes_read;
}
static ssize_t enable_ints_write(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos)
{
char buf[4];
int i, new_value;
struct virthba_info *virthbainfo;
U64 __iomem *Features_addr;
U64 mask;
if (count >= ARRAY_SIZE(buf))
return -EINVAL;
buf[count] = '\0';
if (copy_from_user(buf, buffer, count)) {
LOGERR("copy_from_user failed. buf<<%.*s>> count<<%lu>>\n",
(int) count, buf, count);
return -EFAULT;
}
i = kstrtoint(buf, 10 , &new_value);
if (i != 0) {
LOGERR("Failed to scan value for enable_ints, buf<<%.*s>>",
(int) count, buf);
return -EFAULT;
}
/*set all counts to new_value usually 0*/
for (i = 0; i < VIRTHBASOPENMAX; i++) {
if (VirtHbasOpen[i].virthbainfo != NULL) {
virthbainfo = VirtHbasOpen[i].virthbainfo;
Features_addr =
&virthbainfo->chinfo.queueinfo->chan->Features;
if (new_value == 1) {
mask = ~(ULTRA_IO_CHANNEL_IS_POLLING |
ULTRA_IO_DRIVER_DISABLES_INTS);
uisqueue_InterlockedAnd(Features_addr, mask);
mask = ULTRA_IO_DRIVER_ENABLES_INTS;
uisqueue_InterlockedOr(Features_addr, mask);
rsltq_wait_usecs = 4000000;
} else {
mask = ~(ULTRA_IO_DRIVER_ENABLES_INTS |
ULTRA_IO_DRIVER_DISABLES_INTS);
uisqueue_InterlockedAnd(Features_addr, mask);
mask = ULTRA_IO_CHANNEL_IS_POLLING;
uisqueue_InterlockedOr(Features_addr, mask);
rsltq_wait_usecs = 4000;
}
}
}
return count;
}
/* As per VirtpciFunc returns 1 for success and 0 for failure */
static int
virthba_serverup(struct virtpci_dev *virtpcidev)
@ -1605,6 +1665,9 @@ virthba_mod_init(void)
NULL, &debugfs_info_fops);
debugfs_create_u32("rqwait_usecs", S_IRUSR | S_IWUSR,
virthba_debugfs_dir, &rsltq_wait_usecs);
debugfs_create_file("enable_ints", S_IWUSR,
virthba_debugfs_dir, NULL,
&debugfs_enable_ints_fops);
/* Initialize DARWorkQ */
INIT_WORK(&DARWorkQ, doDiskAddRemove);
spin_lock_init(&DARWorkQLock);