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Diffstat (limited to 'drivers/s390/cio/io_sch.h')
-rw-r--r--drivers/s390/cio/io_sch.h73
1 files changed, 67 insertions, 6 deletions
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h
index 0b8f381bd20..d72ae4c93af 100644
--- a/drivers/s390/cio/io_sch.h
+++ b/drivers/s390/cio/io_sch.h
@@ -1,7 +1,10 @@
#ifndef S390_IO_SCH_H
#define S390_IO_SCH_H
+#include <linux/types.h>
#include <asm/schid.h>
+#include <asm/ccwdev.h>
+#include "css.h"
/*
* command-mode operation request block
@@ -68,6 +71,52 @@ struct io_subchannel_private {
#define MAX_CIWS 8
/*
+ * Possible status values for a CCW request's I/O.
+ */
+enum io_status {
+ IO_DONE,
+ IO_RUNNING,
+ IO_STATUS_ERROR,
+ IO_PATH_ERROR,
+ IO_REJECTED,
+ IO_KILLED
+};
+
+/**
+ * ccw_request - Internal CCW request.
+ * @cp: channel program to start
+ * @timeout: maximum allowable time in jiffies between start I/O and interrupt
+ * @maxretries: number of retries per I/O operation and path
+ * @lpm: mask of paths to use
+ * @check: optional callback that determines if results are final
+ * @filter: optional callback to adjust request status based on IRB data
+ * @callback: final callback
+ * @data: user-defined pointer passed to all callbacks
+ * @mask: current path mask
+ * @retries: current number of retries
+ * @drc: delayed return code
+ * @cancel: non-zero if request was cancelled
+ * @done: non-zero if request was finished
+ */
+struct ccw_request {
+ struct ccw1 *cp;
+ unsigned long timeout;
+ u16 maxretries;
+ u8 lpm;
+ int (*check)(struct ccw_device *, void *);
+ enum io_status (*filter)(struct ccw_device *, void *, struct irb *,
+ enum io_status);
+ void (*callback)(struct ccw_device *, void *, int);
+ void *data;
+ /* These fields are used internally. */
+ u16 mask;
+ u16 retries;
+ int drc;
+ int cancel:1;
+ int done:1;
+} __attribute__((packed));
+
+/*
* sense-id response buffer layout
*/
struct senseid {
@@ -82,32 +131,43 @@ struct senseid {
struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
} __attribute__ ((packed, aligned(4)));
+enum cdev_todo {
+ CDEV_TODO_NOTHING,
+ CDEV_TODO_ENABLE_CMF,
+ CDEV_TODO_REBIND,
+ CDEV_TODO_REGISTER,
+ CDEV_TODO_UNREG,
+ CDEV_TODO_UNREG_EVAL,
+};
+
struct ccw_device_private {
struct ccw_device *cdev;
struct subchannel *sch;
int state; /* device state */
atomic_t onoff;
- unsigned long registered;
struct ccw_dev_id dev_id; /* device id */
struct subchannel_id schid; /* subchannel number */
- u8 imask; /* lpm mask for SNID/SID/SPGID */
- int iretry; /* retry counter SNID/SID/SPGID */
+ struct ccw_request req; /* internal I/O request */
+ int iretry;
+ u8 pgid_valid_mask; /* mask of valid PGIDs */
struct {
unsigned int fast:1; /* post with "channel end" */
unsigned int repall:1; /* report every interrupt status */
unsigned int pgroup:1; /* do path grouping */
unsigned int force:1; /* allow forced online */
+ unsigned int mpath:1; /* do multipathing */
} __attribute__ ((packed)) options;
struct {
- unsigned int pgid_single:1; /* use single path for Set PGID */
unsigned int esid:1; /* Ext. SenseID supported by HW */
unsigned int dosense:1; /* delayed SENSE required */
unsigned int doverify:1; /* delayed path verification */
unsigned int donotify:1; /* call notify function */
unsigned int recog_done:1; /* dev. recog. complete */
unsigned int fake_irb:1; /* deliver faked irb */
- unsigned int intretry:1; /* retry internal operation */
unsigned int resuming:1; /* recognition while resume */
+ unsigned int pgroup:1; /* pathgroup is set up */
+ unsigned int mpath:1; /* multipathing is set up */
+ unsigned int initialized:1; /* set if initial reference held */
} __attribute__((packed)) flags;
unsigned long intparm; /* user interruption parameter */
struct qdio_irq *qdio_data;
@@ -115,7 +175,8 @@ struct ccw_device_private {
struct senseid senseid; /* SenseID info */
struct pgid pgid[8]; /* path group IDs per chpid*/
struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
- struct work_struct kick_work;
+ struct work_struct todo_work;
+ enum cdev_todo todo;
wait_queue_head_t wait_q;
struct timer_list timer;
void *cmb; /* measurement information */