diff options
Diffstat (limited to 'drivers/s390/cio/device_ops.c')
| -rw-r--r-- | drivers/s390/cio/device_ops.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c index 10f72c5..ee1a283 100644 --- a/drivers/s390/cio/device_ops.c +++ b/drivers/s390/cio/device_ops.c @@ -17,6 +17,7 @@ #include <asm/ccwdev.h> #include <asm/idals.h> #include <asm/chpid.h> +#include <asm/fcx.h> #include "cio.h" #include "cio_debug.h" @@ -569,6 +570,122 @@ void ccw_device_get_id(struct ccw_device *cdev, struct ccw_dev_id *dev_id) } EXPORT_SYMBOL(ccw_device_get_id); +/** + * ccw_device_tm_start_key - perform start function + * @cdev: ccw device on which to perform the start function + * @tcw: transport-command word to be started + * @intparm: user defined parameter to be passed to the interrupt handler + * @lpm: mask of paths to use + * @key: storage key to use for storage access + * + * Start the tcw on the given ccw device. Return zero on success, non-zero + * otherwise. + */ +int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw, + unsigned long intparm, u8 lpm, u8 key) +{ + struct subchannel *sch; + int rc; + + sch = to_subchannel(cdev->dev.parent); + if (cdev->private->state != DEV_STATE_ONLINE) + return -EIO; + /* Adjust requested path mask to excluded varied off paths. */ + if (lpm) { + lpm &= sch->opm; + if (lpm == 0) + return -EACCES; + } + rc = cio_tm_start_key(sch, tcw, lpm, key); + if (rc == 0) + cdev->private->intparm = intparm; + return rc; +} +EXPORT_SYMBOL(ccw_device_tm_start_key); + +/** + * ccw_device_tm_start_timeout_key - perform start function + * @cdev: ccw device on which to perform the start function + * @tcw: transport-command word to be started + * @intparm: user defined parameter to be passed to the interrupt handler + * @lpm: mask of paths to use + * @key: storage key to use for storage access + * @expires: time span in jiffies after which to abort request + * + * Start the tcw on the given ccw device. Return zero on success, non-zero + * otherwise. + */ +int ccw_device_tm_start_timeout_key(struct ccw_device *cdev, struct tcw *tcw, + unsigned long intparm, u8 lpm, u8 key, + int expires) +{ + int ret; + + ccw_device_set_timeout(cdev, expires); + ret = ccw_device_tm_start_key(cdev, tcw, intparm, lpm, key); + if (ret != 0) + ccw_device_set_timeout(cdev, 0); + return ret; +} +EXPORT_SYMBOL(ccw_device_tm_start_timeout_key); + +/** + * ccw_device_tm_start - perform start function + * @cdev: ccw device on which to perform the start function + * @tcw: transport-command word to be started + * @intparm: user defined parameter to be passed to the interrupt handler + * @lpm: mask of paths to use + * + * Start the tcw on the given ccw device. Return zero on success, non-zero + * otherwise. + */ +int ccw_device_tm_start(struct ccw_device *cdev, struct tcw *tcw, + unsigned long intparm, u8 lpm) +{ + return ccw_device_tm_start_key(cdev, tcw, intparm, lpm, + PAGE_DEFAULT_KEY); +} +EXPORT_SYMBOL(ccw_device_tm_start); + +/** + * ccw_device_tm_start_timeout - perform start function + * @cdev: ccw device on which to perform the start function + * @tcw: transport-command word to be started + * @intparm: user defined parameter to be passed to the interrupt handler + * @lpm: mask of paths to use + * @expires: time span in jiffies after which to abort request + * + * Start the tcw on the given ccw device. Return zero on success, non-zero + * otherwise. + */ +int ccw_device_tm_start_timeout(struct ccw_device *cdev, struct tcw *tcw, + unsigned long intparm, u8 lpm, int expires) +{ + return ccw_device_tm_start_timeout_key(cdev, tcw, intparm, lpm, + PAGE_DEFAULT_KEY, expires); +} +EXPORT_SYMBOL(ccw_device_tm_start_timeout); + +/** + * ccw_device_tm_intrg - perform interrogate function + * @cdev: ccw device on which to perform the interrogate function + * + * Perform an interrogate function on the given ccw device. Return zero on + * success, non-zero otherwise. + */ +int ccw_device_tm_intrg(struct ccw_device *cdev) +{ + struct subchannel *sch = to_subchannel(cdev->dev.parent); + + if (cdev->private->state != DEV_STATE_ONLINE) + return -EIO; + if (!scsw_is_tm(&sch->schib.scsw) || + !(scsw_actl(&sch->schib.scsw) | SCSW_ACTL_START_PEND)) + return -EINVAL; + return cio_tm_intrg(sch); +} +EXPORT_SYMBOL(ccw_device_tm_intrg); + // FIXME: these have to go: int |