sgi-gru: add support to the GRU driver for message queue interrupts

Add support to the GRU driver for message queue interrupts.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 22 insertions, 11 deletions

diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h
index 275b78896a7..114444cfd49 100644
--- a/drivers/misc/sgi-xp/xpc.h
+++ b/drivers/misc/sgi-xp/xpc.h
@@ -92,7 +92,9 @@ struct xpc_rsvd_page {
         u8 pad1[3];             /* align to next u64 in 1st 64-byte cacheline */
         union {
                 unsigned long vars_pa;  /* phys address of struct xpc_vars */
-                unsigned long activate_mq_gpa; /* gru phy addr of activate_mq */
+                unsigned long activate_gru_mq_desc_gpa; /* phys addr of */
+                                                        /* activate mq's */
+                                                        /* gru mq descriptor */
         } sn;
         unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
         u64 pad2[10];           /* align to last u64 in 2nd 64-byte cacheline */
@@ -189,7 +191,9 @@ struct xpc_gru_mq_uv {
         int irq;                /* irq raised when message is received in mq */
         int mmr_blade;          /* blade where watchlist was allocated from */
         unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */
+        unsigned long mmr_value; /* value of irq mmr located on mmr_blade */
         int watchlist_num;      /* number of watchlist allocatd by BIOS */
+        void *gru_mq_desc;      /* opaque structure used by the GRU driver */
 };
 
 /*
@@ -197,6 +201,7 @@ struct xpc_gru_mq_uv {
  * heartbeat, partition active state, and channel state. This is UV only.
  */
 struct xpc_activate_mq_msghdr_uv {
+        unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */
         short partid;           /* sender's partid */
         u8 act_state;           /* sender's act_state at time msg sent */
         u8 type;                /* message's type */
@@ -232,7 +237,7 @@ struct xpc_activate_mq_msg_heartbeat_req_uv {
 struct xpc_activate_mq_msg_activate_req_uv {
         struct xpc_activate_mq_msghdr_uv hdr;
         unsigned long rp_gpa;
-        unsigned long activate_mq_gpa;
+        unsigned long activate_gru_mq_desc_gpa;
 };
 
 struct xpc_activate_mq_msg_deactivate_req_uv {
@@ -263,7 +268,7 @@ struct xpc_activate_mq_msg_chctl_openreply_uv {
         short ch_number;
         short remote_nentries;  /* ??? Is this needed? What is? */
         short local_nentries;   /* ??? Is this needed? What is? */
-        unsigned long local_notify_mq_gpa;
+        unsigned long notify_gru_mq_desc_gpa;
 };
 
 /*
@@ -510,8 +515,8 @@ struct xpc_channel_sn2 {
 };
 
 struct xpc_channel_uv {
-        unsigned long remote_notify_mq_gpa;     /* gru phys address of remote */
-                                                /* partition's notify mq */
+        void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */
+                                         /* gru mq descriptor */
 
         struct xpc_send_msg_slot_uv *send_msg_slots;
         void *recv_msg_slots;   /* each slot will hold a xpc_notify_mq_msg_uv */
@@ -682,8 +687,12 @@ struct xpc_partition_sn2 {
 };
 
 struct xpc_partition_uv {
-        unsigned long remote_activate_mq_gpa;   /* gru phys address of remote */
-                                                /* partition's activate mq */
+        unsigned long activate_gru_mq_desc_gpa; /* phys addr of parititon's */
+                                                /* activate mq's gru mq */
+                                                /* descriptor */
+        void *cached_activate_gru_mq_desc; /* cached copy of partition's */
+                                           /* activate mq's gru mq descriptor */
+        struct mutex cached_activate_gru_mq_desc_mutex;
         spinlock_t flags_lock;  /* protect updating of flags */
         unsigned int flags;     /* general flags */
         u8 remote_act_state;    /* remote partition's act_state */
@@ -694,8 +703,9 @@ struct xpc_partition_uv {
 
 /* struct xpc_partition_uv flags */
 
-#define XPC_P_HEARTBEAT_OFFLINE_UV      0x00000001
-#define XPC_P_ENGAGED_UV                0x00000002
+#define XPC_P_HEARTBEAT_OFFLINE_UV              0x00000001
+#define XPC_P_ENGAGED_UV                        0x00000002
+#define XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV    0x00000004
 
 /* struct xpc_partition_uv act_state change requests */
 
@@ -804,6 +814,7 @@ extern void xpc_activate_kthreads(struct xpc_channel *, int);
 extern void xpc_create_kthreads(struct xpc_channel *, int, int);
 extern void xpc_disconnect_wait(int);
 extern int (*xpc_setup_partitions_sn) (void);
+extern void (*xpc_teardown_partitions_sn) (void);
 extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *, u64 *,
                                                          unsigned long *,
                                                          size_t *);
@@ -846,8 +857,8 @@ extern void (*xpc_send_chctl_openrequest) (struct xpc_channel *,
                                            unsigned long *);
 extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *);
 
-extern void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *,
-                                            unsigned long);
+extern enum xp_retval (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *,
+                                                      unsigned long);
 
 extern enum xp_retval (*xpc_send_payload) (struct xpc_channel *, u32, void *,
                                            u16, u8, xpc_notify_func, void *);