[IA64-SGI] fixes for XPC disengage and open/close protocol
This patch addresses a few issues with the open/close protocol that
were revealed by the newly added disengage functionality combined
with more extensive testing.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/sn/kernel/xpc.h b/arch/ia64/sn/kernel/xpc.h
index 565822a..ae51d7b 100644
--- a/arch/ia64/sn/kernel/xpc.h
+++ b/arch/ia64/sn/kernel/xpc.h
@@ -417,6 +417,9 @@
atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */
wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */
+ u8 delayed_IPI_flags; /* IPI flags received, but delayed */
+ /* action until channel disconnected */
+
/* queue of msg senders who want to be notified when msg received */
atomic_t n_to_notify; /* #of msg senders to notify */
@@ -478,7 +481,8 @@
#define XPC_C_DISCONNECTED 0x00002000 /* channel is disconnected */
#define XPC_C_DISCONNECTING 0x00004000 /* channel is being disconnected */
-#define XPC_C_WDISCONNECT 0x00008000 /* waiting for channel disconnect */
+#define XPC_C_DISCONNECTCALLOUT 0x00008000 /* chan disconnected callout made */
+#define XPC_C_WDISCONNECT 0x00010000 /* waiting for channel disconnect */
@@ -508,13 +512,13 @@
int reason_line; /* line# deactivation initiated from */
int reactivate_nasid; /* nasid in partition to reactivate */
- unsigned long disengage_request_timeout; /* timeout in XPC_TICKS */
+ unsigned long disengage_request_timeout; /* timeout in jiffies */
struct timer_list disengage_request_timer;
/* XPC infrastructure referencing and teardown control */
- volatile u8 setup_state; /* infrastructure setup state */
+ volatile u8 setup_state; /* infrastructure setup state */
wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */
atomic_t references; /* #of references to infrastructure */
@@ -604,7 +608,7 @@
/* number of seconds to wait for other partitions to disengage */
-#define XPC_DISENGAGE_REQUEST_TIMELIMIT 90
+#define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT 90
/* interval in seconds to print 'waiting disengagement' messages */
#define XPC_DISENGAGE_PRINTMSG_INTERVAL 10
@@ -618,20 +622,18 @@
extern struct xpc_registration xpc_registrations[];
-/* >>> found in xpc_main.c only */
+/* found in xpc_main.c */
extern struct device *xpc_part;
extern struct device *xpc_chan;
+extern int xpc_disengage_request_timelimit;
extern irqreturn_t xpc_notify_IRQ_handler(int, void *, struct pt_regs *);
extern void xpc_dropped_IPI_check(struct xpc_partition *);
+extern void xpc_activate_partition(struct xpc_partition *);
extern void xpc_activate_kthreads(struct xpc_channel *, int);
extern void xpc_create_kthreads(struct xpc_channel *, int);
extern void xpc_disconnect_wait(int);
-/* found in xpc_main.c and efi-xpc.c */
-extern void xpc_activate_partition(struct xpc_partition *);
-
-
/* found in xpc_partition.c */
extern int xpc_exiting;
extern struct xpc_vars *xpc_vars;
@@ -1077,6 +1079,7 @@
/* given an AMO variable and a channel#, get its associated IPI flags */
#define XPC_GET_IPI_FLAGS(_amo, _c) ((u8) (((_amo) >> ((_c) * 8)) & 0xff))
+#define XPC_SET_IPI_FLAGS(_amo, _c, _f) (_amo) |= ((u64) (_f) << ((_c) * 8))
#define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0f)
#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010)