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path: root/drivers/s390/block/dasd_int.h
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Diffstat (limited to 'drivers/s390/block/dasd_int.h')
-rw-r--r--drivers/s390/block/dasd_int.h35
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 500678d7116..df9f6999411 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -231,6 +231,11 @@ struct dasd_ccw_req {
/* per dasd_ccw_req flags */
#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
+#define DASD_CQR_VERIFY_PATH 2 /* path verification request */
+#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was
+ * stolen. Should not be combined with
+ * DASD_CQR_FLAGS_USE_ERP
+ */
/* Signature for error recovery functions. */
typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
@@ -287,6 +292,14 @@ struct dasd_discipline {
int (*do_analysis) (struct dasd_block *);
/*
+ * This function is called, when new paths become available.
+ * Disciplins may use this callback to do necessary setup work,
+ * e.g. verify that new path is compatible with the current
+ * configuration.
+ */
+ int (*verify_path)(struct dasd_device *, __u8);
+
+ /*
* Last things to do when a device is set online, and first things
* when it is set offline.
*/
@@ -325,9 +338,9 @@ struct dasd_discipline {
void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
struct irb *);
void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
-
- void (*handle_unsolicited_interrupt) (struct dasd_device *,
- struct irb *);
+ void (*check_for_device_change) (struct dasd_device *,
+ struct dasd_ccw_req *,
+ struct irb *);
/* i/o control functions. */
int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
@@ -362,6 +375,13 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer;
#define DASD_EER_STATECHANGE 3
#define DASD_EER_PPRCSUSPEND 4
+struct dasd_path {
+ __u8 opm;
+ __u8 tbvpm;
+ __u8 ppm;
+ __u8 npm;
+};
+
struct dasd_device {
/* Block device stuff. */
struct dasd_block *block;
@@ -377,6 +397,7 @@ struct dasd_device {
struct dasd_discipline *discipline;
struct dasd_discipline *base_discipline;
char *private;
+ struct dasd_path path_data;
/* Device state and target state. */
int state, target;
@@ -456,6 +477,9 @@ struct dasd_block {
* confuse this with the user specified
* read-only feature.
*/
+#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
+#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
+
void dasd_put_device_wake(struct dasd_device *);
@@ -620,10 +644,15 @@ void dasd_generic_remove (struct ccw_device *cdev);
int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
int dasd_generic_set_offline (struct ccw_device *cdev);
int dasd_generic_notify(struct ccw_device *, int);
+int dasd_generic_last_path_gone(struct dasd_device *);
+int dasd_generic_path_operational(struct dasd_device *);
+
void dasd_generic_handle_state_change(struct dasd_device *);
int dasd_generic_pm_freeze(struct ccw_device *);
int dasd_generic_restore_device(struct ccw_device *);
enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
+void dasd_generic_path_event(struct ccw_device *, int *);
+int dasd_generic_verify_path(struct dasd_device *, __u8);
int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
char *dasd_get_sense(struct irb *);