diff options
Diffstat (limited to 'drivers/staging/unisys/virthba/virthba.c')
| -rw-r--r-- | drivers/staging/unisys/virthba/virthba.c | 63 |
1 files changed, 63 insertions, 0 deletions
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); |
