This patch adds enable_ints entry to virthba directory
Signed-off-by: Erik Arfvidson <erik.arfvidson@xxxxxxxxxx>
---
drivers/staging/unisys/virthba/virthba.c | 63 ++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/drivers/staging/unisys/virthba/virthba.c b/drivers/staging/unisys/virthba/virthba.c
index 857de11..65a75c8 100644
--- a/drivers/staging/unisys/virthba/virthba.c
+++ b/drivers/staging/unisys/virthba/virthba.c
@@ -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);
--
1.9.1
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