diff options
Diffstat (limited to 'drivers/misc/sgi-xp/xpc.h')
| -rw-r--r-- | drivers/misc/sgi-xp/xpc.h | 140 |
1 files changed, 107 insertions, 33 deletions
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h index 4c26181defff..619208d61862 100644 --- a/drivers/misc/sgi-xp/xpc.h +++ b/drivers/misc/sgi-xp/xpc.h @@ -181,8 +181,8 @@ struct xpc_vars_part_sn2 { xpc_nasid_mask_nlongs)) /* - * The activate_mq is used to send/receive messages that affect XPC's heartbeat, - * partition active state, and channel state. This is UV only. + * The activate_mq is used to send/receive GRU messages that affect XPC's + * heartbeat, partition active state, and channel state. This is UV only. */ struct xpc_activate_mq_msghdr_uv { short partid; /* sender's partid */ @@ -209,45 +209,45 @@ struct xpc_activate_mq_msghdr_uv { #define XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV 11 struct xpc_activate_mq_msg_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; }; struct xpc_activate_mq_msg_heartbeat_req_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; u64 heartbeat; }; struct xpc_activate_mq_msg_activate_req_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; unsigned long rp_gpa; unsigned long activate_mq_gpa; }; struct xpc_activate_mq_msg_deactivate_req_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; enum xp_retval reason; }; struct xpc_activate_mq_msg_chctl_closerequest_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; short ch_number; enum xp_retval reason; }; struct xpc_activate_mq_msg_chctl_closereply_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; short ch_number; }; struct xpc_activate_mq_msg_chctl_openrequest_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; short ch_number; - short msg_size; /* size of notify_mq's messages */ + short entry_size; /* size of notify_mq's GRU messages */ short local_nentries; /* ??? Is this needed? What is? */ }; struct xpc_activate_mq_msg_chctl_openreply_uv { - struct xpc_activate_mq_msghdr_uv header; + struct xpc_activate_mq_msghdr_uv hdr; short ch_number; short remote_nentries; /* ??? Is this needed? What is? */ short local_nentries; /* ??? Is this needed? What is? */ @@ -284,7 +284,7 @@ struct xpc_gp_sn2 { */ struct xpc_openclose_args { u16 reason; /* reason why channel is closing */ - u16 msg_size; /* sizeof each message entry */ + u16 entry_size; /* sizeof each message entry */ u16 remote_nentries; /* #of message entries in remote msg queue */ u16 local_nentries; /* #of message entries in local msg queue */ unsigned long local_msgqueue_pa; /* phys addr of local message queue */ @@ -294,22 +294,79 @@ struct xpc_openclose_args { L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \ XPC_MAX_NCHANNELS) -/* struct xpc_msg flags */ -#define XPC_M_DONE 0x01 /* msg has been received/consumed */ -#define XPC_M_READY 0x02 /* msg is ready to be sent */ -#define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ +/* + * Structures to define a fifo singly-linked list. + */ + +struct xpc_fifo_entry_uv { + struct xpc_fifo_entry_uv *next; +}; + +struct xpc_fifo_head_uv { + struct xpc_fifo_entry_uv *first; + struct xpc_fifo_entry_uv *last; + spinlock_t lock; + int n_entries; +}; + +/* + * Define a sn2 styled message. + * + * A user-defined message resides in the payload area. The max size of the + * payload is defined by the user via xpc_connect(). + * + * The size of a message entry (within a message queue) must be a 128-byte + * cacheline sized multiple in order to facilitate the BTE transfer of messages + * from one message queue to another. + */ +struct xpc_msg_sn2 { + u8 flags; /* FOR XPC INTERNAL USE ONLY */ + u8 reserved[7]; /* FOR XPC INTERNAL USE ONLY */ + s64 number; /* FOR XPC INTERNAL USE ONLY */ + + u64 payload; /* user defined portion of message */ +}; + +/* struct xpc_msg_sn2 flags */ + +#define XPC_M_SN2_DONE 0x01 /* msg has been received/consumed */ +#define XPC_M_SN2_READY 0x02 /* msg is ready to be sent */ +#define XPC_M_SN2_INTERRUPT 0x04 /* send interrupt when msg consumed */ + +/* + * The format of a uv XPC notify_mq GRU message is as follows: + * + * A user-defined message resides in the payload area. The max size of the + * payload is defined by the user via xpc_connect(). + * + * The size of a message (payload and header) sent via the GRU must be either 1 + * or 2 GRU_CACHE_LINE_BYTES in length. + */ -#define XPC_MSG_ADDRESS(_payload) \ - ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) +struct xpc_notify_mq_msghdr_uv { + union { + unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */ + struct xpc_fifo_entry_uv next; /* FOR XPC INTERNAL USE ONLY */ + } u; + short partid; /* FOR XPC INTERNAL USE ONLY */ + u8 ch_number; /* FOR XPC INTERNAL USE ONLY */ + u8 size; /* FOR XPC INTERNAL USE ONLY */ + unsigned int msg_slot_number; /* FOR XPC INTERNAL USE ONLY */ +}; + +struct xpc_notify_mq_msg_uv { + struct xpc_notify_mq_msghdr_uv hdr; + unsigned long payload; +}; /* - * Defines notify entry. + * Define sn2's notify entry. * * This is used to notify a message's sender that their message was received * and consumed by the intended recipient. */ -struct xpc_notify { +struct xpc_notify_sn2 { u8 type; /* type of notification */ /* the following two fields are only used if type == XPC_N_CALL */ @@ -317,9 +374,20 @@ struct xpc_notify { void *key; /* pointer to user's key */ }; -/* struct xpc_notify type of notification */ +/* struct xpc_notify_sn2 type of notification */ -#define XPC_N_CALL 0x01 /* notify function provided by user */ +#define XPC_N_CALL 0x01 /* notify function provided by user */ + +/* + * Define uv's version of the notify entry. It additionally is used to allocate + * a msg slot on the remote partition into which is copied a sent message. + */ +struct xpc_send_msg_slot_uv { + struct xpc_fifo_entry_uv next; + unsigned int msg_slot_number; + xpc_notify_func func; /* user's notify function */ + void *key; /* pointer to user's key */ +}; /* * Define the structure that manages all the stuff required by a channel. In @@ -409,14 +477,14 @@ struct xpc_channel_sn2 { /* opening or closing of channel */ void *local_msgqueue_base; /* base address of kmalloc'd space */ - struct xpc_msg *local_msgqueue; /* local message queue */ + struct xpc_msg_sn2 *local_msgqueue; /* local message queue */ void *remote_msgqueue_base; /* base address of kmalloc'd space */ - struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ - /* local message queue */ + struct xpc_msg_sn2 *remote_msgqueue; /* cached copy of remote */ + /* partition's local message queue */ unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */ /* local message queue */ - struct xpc_notify *notify_queue; /* notify queue for messages sent */ + struct xpc_notify_sn2 *notify_queue;/* notify queue for messages sent */ /* various flavors of local and remote Get/Put values */ @@ -432,6 +500,12 @@ struct xpc_channel_sn2 { struct xpc_channel_uv { unsigned long remote_notify_mq_gpa; /* gru phys address of remote */ /* partition's notify mq */ + + struct xpc_send_msg_slot_uv *send_msg_slots; + struct xpc_notify_mq_msg_uv *recv_msg_slots; + + struct xpc_fifo_head_uv msg_slot_free_list; + struct xpc_fifo_head_uv recv_msg_list; /* deliverable payloads */ }; struct xpc_channel { @@ -444,7 +518,7 @@ struct xpc_channel { u16 number; /* channel # */ - u16 msg_size; /* sizeof each msg entry */ + u16 entry_size; /* sizeof each msg entry */ u16 local_nentries; /* #of msg entries in local msg queue */ u16 remote_nentries; /* #of msg entries in remote msg queue */ @@ -733,8 +807,8 @@ extern enum xp_retval (*xpc_setup_msg_structures) (struct xpc_channel *); extern void (*xpc_teardown_msg_structures) (struct xpc_channel *); extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *); extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int); -extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *); -extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *); +extern int (*xpc_n_of_deliverable_payloads) (struct xpc_channel *); +extern void *(*xpc_get_deliverable_payload) (struct xpc_channel *); extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *, unsigned long, int); extern void (*xpc_request_partition_reactivation) (struct xpc_partition *); @@ -762,9 +836,9 @@ 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_send_msg) (struct xpc_channel *, u32, void *, u16, - u8, xpc_notify_func, void *); -extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *); +extern enum xp_retval (*xpc_send_payload) (struct xpc_channel *, u32, void *, + u16, u8, xpc_notify_func, void *); +extern void (*xpc_received_payload) (struct xpc_channel *, void *); /* found in xpc_sn2.c */ extern int xpc_init_sn2(void); @@ -805,7 +879,7 @@ extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16, extern void xpc_initiate_received(short, int, void *); extern void xpc_process_sent_chctl_flags(struct xpc_partition *); extern void xpc_connected_callout(struct xpc_channel *); -extern void xpc_deliver_msg(struct xpc_channel *); +extern void xpc_deliver_payload(struct xpc_channel *); extern void xpc_disconnect_channel(const int, struct xpc_channel *, enum xp_retval, unsigned long *); extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval); |