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sgi-xp: setup the notify GRU message queue

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Setup the notify GRU message queue that is used for sending user messages
on UV systems.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dean Nelson 2008-07-29 22:34:19 -07:00 committed by Linus Torvalds
parent 5b8669dfd1
commit bd3e64c175
8 changed files with 1043 additions and 395 deletions
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45
drivers/misc/sgi-xp/xp.h
View File

@ -87,39 +87,18 @@
#endif
/*
* The format of an XPC message is as follows:
*
* +-------+--------------------------------+
* | flags |////////////////////////////////|
* +-------+--------------------------------+
* | message # |
* +----------------------------------------+
* | payload (user-defined message) |
* | |
* :
* | |
* +----------------------------------------+
*
* The size of the payload is defined by the user via xpc_connect(). A user-
* defined message resides in the payload area.
*
* The size of a message entry (within a message queue) must be a cacheline
* sized multiple in order to facilitate the BTE transfer of messages from one
* message queue to another. A macro, XPC_MSG_SIZE(), is provided for the user
* Define macro, XPC_MSG_SIZE(), is provided for the user
* that wants to fit as many msg entries as possible in a given memory size
* (e.g. a memory page).
*/
struct xpc_msg {
u8 flags; /* FOR XPC INTERNAL USE ONLY */
u8 reserved[7]; /* FOR XPC INTERNAL USE ONLY */
s64 number; /* FOR XPC INTERNAL USE ONLY */
#define XPC_MSG_MAX_SIZE 128
#define XPC_MSG_HDR_MAX_SIZE 16
#define XPC_MSG_PAYLOAD_MAX_SIZE (XPC_MSG_MAX_SIZE - XPC_MSG_HDR_MAX_SIZE)
u64 payload; /* user defined portion of message */
};
#define XPC_MSG_PAYLOAD_OFFSET (u64) (&((struct xpc_msg *)0)->payload)
#define XPC_MSG_SIZE(_payload_size) \
L1_CACHE_ALIGN(XPC_MSG_PAYLOAD_OFFSET + (_payload_size))
ALIGN(XPC_MSG_HDR_MAX_SIZE + (_payload_size), \
is_uv() ? 64 : 128)
/*
* Define the return values and values passed to user's callout functions.
@ -210,7 +189,10 @@ enum xp_retval {
xpGruCopyError, /* 58: gru_copy_gru() returned error */
xpGruSendMqError, /* 59: gru send message queue related error */
xpUnknownReason /* 60: unknown reason - must be last in enum */
xpBadChannelNumber, /* 60: invalid channel number */
xpBadMsgType, /* 60: invalid message type */
xpUnknownReason /* 61: unknown reason - must be last in enum */
};
/*
@ -261,6 +243,9 @@ typedef void (*xpc_channel_func) (enum xp_retval reason, short partid,
* calling xpc_received().
*
* All other reason codes indicate failure.
*
* NOTE: The user defined function must be callable by an interrupt handler
* and thus cannot block.
*/
typedef void (*xpc_notify_func) (enum xp_retval reason, short partid,
int ch_number, void *key);
@ -284,7 +269,7 @@ struct xpc_registration {
xpc_channel_func func; /* function to call */
void *key; /* pointer to user's key */
u16 nentries; /* #of msg entries in local msg queue */
u16 msg_size; /* message queue's message size */
u16 entry_size; /* message queue's message entry size */
u32 assigned_limit; /* limit on #of assigned kthreads */
u32 idle_limit; /* limit on #of idle kthreads */
} ____cacheline_aligned;

7
drivers/misc/sgi-xp/xp_main.c
View File

@ -154,6 +154,9 @@ xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
DBUG_ON(func == NULL);
DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
if (XPC_MSG_SIZE(payload_size) > XPC_MSG_MAX_SIZE)
return xpPayloadTooBig;
registration = &xpc_registrations[ch_number];
if (mutex_lock_interruptible(&registration->mutex) != 0)
@ -166,7 +169,7 @@ xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
}
/* register the channel for connection */
registration->msg_size = XPC_MSG_SIZE(payload_size);
registration->entry_size = XPC_MSG_SIZE(payload_size);
registration->nentries = nentries;
registration->assigned_limit = assigned_limit;
registration->idle_limit = idle_limit;
@ -220,7 +223,7 @@ xpc_disconnect(int ch_number)
registration->func = NULL;
registration->key = NULL;
registration->nentries = 0;
registration->msg_size = 0;
registration->entry_size = 0;
registration->assigned_limit = 0;
registration->idle_limit = 0;

144
drivers/misc/sgi-xp/xpc.h
View File

@ -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 */
#define XPC_MSG_ADDRESS(_payload) \
((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET))
/*
* Defines notify entry.
* 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.
*/
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;
};
/*
* 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);

63
drivers/misc/sgi-xp/xpc_channel.c
View File

@ -139,7 +139,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
ch->func = NULL;
ch->key = NULL;
ch->msg_size = 0;
ch->entry_size = 0;
ch->local_nentries = 0;
ch->remote_nentries = 0;
ch->kthreads_assigned_limit = 0;
@ -315,9 +315,9 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
if (chctl_flags & XPC_CHCTL_OPENREQUEST) {
dev_dbg(xpc_chan, "XPC_CHCTL_OPENREQUEST (msg_size=%d, "
dev_dbg(xpc_chan, "XPC_CHCTL_OPENREQUEST (entry_size=%d, "
"local_nentries=%d) received from partid=%d, "
"channel=%d\n", args->msg_size, args->local_nentries,
"channel=%d\n", args->entry_size, args->local_nentries,
ch->partid, ch->number);
if (part->act_state == XPC_P_AS_DEACTIVATING ||
@ -338,10 +338,10 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
/*
* The meaningful OPENREQUEST connection state fields are:
* msg_size = size of channel's messages in bytes
* entry_size = size of channel's messages in bytes
* local_nentries = remote partition's local_nentries
*/
if (args->msg_size == 0 || args->local_nentries == 0) {
if (args->entry_size == 0 || args->local_nentries == 0) {
/* assume OPENREQUEST was delayed by mistake */
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
@ -351,14 +351,14 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
ch->remote_nentries = args->local_nentries;
if (ch->flags & XPC_C_OPENREQUEST) {
if (args->msg_size != ch->msg_size) {
if (args->entry_size != ch->entry_size) {
XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
} else {
ch->msg_size = args->msg_size;
ch->entry_size = args->entry_size;
XPC_SET_REASON(ch, 0, 0);
ch->flags &= ~XPC_C_DISCONNECTED;
@ -473,7 +473,7 @@ xpc_connect_channel(struct xpc_channel *ch)
ch->local_nentries = registration->nentries;
if (ch->flags & XPC_C_ROPENREQUEST) {
if (registration->msg_size != ch->msg_size) {
if (registration->entry_size != ch->entry_size) {
/* the local and remote sides aren't the same */
/*
@ -492,7 +492,7 @@ xpc_connect_channel(struct xpc_channel *ch)
return xpUnequalMsgSizes;
}
} else {
ch->msg_size = registration->msg_size;
ch->entry_size = registration->entry_size;
XPC_SET_REASON(ch, 0, 0);
ch->flags &= ~XPC_C_DISCONNECTED;
@ -859,8 +859,8 @@ xpc_initiate_send(short partid, int ch_number, u32 flags, void *payload,
DBUG_ON(payload == NULL);
if (xpc_part_ref(part)) {
ret = xpc_send_msg(&part->channels[ch_number], flags, payload,
payload_size, 0, NULL, NULL);
ret = xpc_send_payload(&part->channels[ch_number], flags,
payload, payload_size, 0, NULL, NULL);
xpc_part_deref(part);
}
@ -911,23 +911,24 @@ xpc_initiate_send_notify(short partid, int ch_number, u32 flags, void *payload,
DBUG_ON(func == NULL);
if (xpc_part_ref(part)) {
ret = xpc_send_msg(&part->channels[ch_number], flags, payload,
payload_size, XPC_N_CALL, func, key);
ret = xpc_send_payload(&part->channels[ch_number], flags,
payload, payload_size, XPC_N_CALL, func,
key);
xpc_part_deref(part);
}
return ret;
}
/*
* Deliver a message to its intended recipient.
* Deliver a message's payload to its intended recipient.
*/
void
xpc_deliver_msg(struct xpc_channel *ch)
xpc_deliver_payload(struct xpc_channel *ch)
{
struct xpc_msg *msg;
void *payload;
msg = xpc_get_deliverable_msg(ch);
if (msg != NULL) {
payload = xpc_get_deliverable_payload(ch);
if (payload != NULL) {
/*
* This ref is taken to protect the payload itself from being
@ -939,18 +940,16 @@ xpc_deliver_msg(struct xpc_channel *ch)
atomic_inc(&ch->kthreads_active);
if (ch->func != NULL) {
dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
msg, (signed long)msg->number, ch->partid,
dev_dbg(xpc_chan, "ch->func() called, payload=0x%p "
"partid=%d channel=%d\n", payload, ch->partid,
ch->number);
/* deliver the message to its intended recipient */
ch->func(xpMsgReceived, ch->partid, ch->number,
&msg->payload, ch->key);
ch->func(xpMsgReceived, ch->partid, ch->number, payload,
ch->key);
dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
msg, (signed long)msg->number, ch->partid,
dev_dbg(xpc_chan, "ch->func() returned, payload=0x%p "
"partid=%d channel=%d\n", payload, ch->partid,
ch->number);
}
@ -959,14 +958,11 @@ xpc_deliver_msg(struct xpc_channel *ch)
}
/*
* Acknowledge receipt of a delivered message.
*
* If a message has XPC_M_INTERRUPT set, send an interrupt to the partition
* that sent the message.
* Acknowledge receipt of a delivered message's payload.
*
* This function, although called by users, does not call xpc_part_ref() to
* ensure that the partition infrastructure is in place. It relies on the
* fact that we called xpc_msgqueue_ref() in xpc_deliver_msg().
* fact that we called xpc_msgqueue_ref() in xpc_deliver_payload().
*
* Arguments:
*
@ -980,14 +976,13 @@ xpc_initiate_received(short partid, int ch_number, void *payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_channel *ch;
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
ch = &part->channels[ch_number];
xpc_received_msg(ch, msg);
xpc_received_payload(ch, payload);
/* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg() */
/* the call to xpc_msgqueue_ref() was done by xpc_deliver_payload() */
xpc_msgqueue_deref(ch);
}

21
drivers/misc/sgi-xp/xpc_main.c
View File

@ -188,8 +188,8 @@ u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *part);
enum xp_retval (*xpc_setup_msg_structures) (struct xpc_channel *ch);
void (*xpc_teardown_msg_structures) (struct xpc_channel *ch);
void (*xpc_process_msg_chctl_flags) (struct xpc_partition *part, int ch_number);
int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *ch);
struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *ch);
int (*xpc_n_of_deliverable_payloads) (struct xpc_channel *ch);
void *(*xpc_get_deliverable_payload) (struct xpc_channel *ch);
void (*xpc_request_partition_activation) (struct xpc_rsvd_page *remote_rp,
unsigned long remote_rp_pa,
@ -220,10 +220,11 @@ void (*xpc_send_chctl_openreply) (struct xpc_channel *ch,
void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *ch,
unsigned long msgqueue_pa);
enum xp_retval (*xpc_send_msg) (struct xpc_channel *ch, u32 flags,
void *payload, u16 payload_size, u8 notify_type,
xpc_notify_func func, void *key);
void (*xpc_received_msg) (struct xpc_channel *ch, struct xpc_msg *msg);
enum xp_retval (*xpc_send_payload) (struct xpc_channel *ch, u32 flags,
void *payload, u16 payload_size,
u8 notify_type, xpc_notify_func func,
void *key);
void (*xpc_received_payload) (struct xpc_channel *ch, void *payload);
/*
* Timer function to enforce the timelimit on the partition disengage.
@ -714,9 +715,9 @@ xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
do {
/* deliver messages to their intended recipients */
while (xpc_n_of_deliverable_msgs(ch) > 0 &&
while (xpc_n_of_deliverable_payloads(ch) > 0 &&
!(ch->flags & XPC_C_DISCONNECTING)) {
xpc_deliver_msg(ch);
xpc_deliver_payload(ch);
}
if (atomic_inc_return(&ch->kthreads_idle) >
@ -730,7 +731,7 @@ xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
"wait_event_interruptible_exclusive()\n");
(void)wait_event_interruptible_exclusive(ch->idle_wq,
(xpc_n_of_deliverable_msgs(ch) > 0 ||
(xpc_n_of_deliverable_payloads(ch) > 0 ||
(ch->flags & XPC_C_DISCONNECTING)));
atomic_dec(&ch->kthreads_idle);
@ -775,7 +776,7 @@ xpc_kthread_start(void *args)
* additional kthreads to help deliver them. We only
* need one less than total #of messages to deliver.
*/
n_needed = xpc_n_of_deliverable_msgs(ch) - 1;
n_needed = xpc_n_of_deliverable_payloads(ch) - 1;
if (n_needed > 0 && !(ch->flags & XPC_C_DISCONNECTING))
xpc_activate_kthreads(ch, n_needed);

178
drivers/misc/sgi-xp/xpc_sn2.c
View File

@ -408,7 +408,7 @@ xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
args->msg_size = ch->msg_size;
args->entry_size = ch->entry_size;
args->local_nentries = ch->local_nentries;
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREQUEST, irq_flags);
}
@ -1531,14 +1531,14 @@ xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
for (nentries = ch->local_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
nbytes = nentries * ch->entry_size;
ch_sn2->local_msgqueue =
xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL,
&ch_sn2->local_msgqueue_base);
if (ch_sn2->local_msgqueue == NULL)
continue;
nbytes = nentries * sizeof(struct xpc_notify);
nbytes = nentries * sizeof(struct xpc_notify_sn2);
ch_sn2->notify_queue = kzalloc(nbytes, GFP_KERNEL);
if (ch_sn2->notify_queue == NULL) {
kfree(ch_sn2->local_msgqueue_base);
@ -1578,7 +1578,7 @@ xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
nbytes = nentries * ch->entry_size;
ch_sn2->remote_msgqueue =
xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL, &ch_sn2->
remote_msgqueue_base);
@ -1632,9 +1632,6 @@ xpc_setup_msg_structures_sn2(struct xpc_channel *ch)
/*
* Free up message queues and other stuff that were allocated for the specified
* channel.
*
* Note: ch->reason and ch->reason_line are left set for debugging purposes,
* they're cleared when XPC_C_DISCONNECTED is cleared.
*/
static void
xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
@ -1674,7 +1671,7 @@ xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
static void
xpc_notify_senders_sn2(struct xpc_channel *ch, enum xp_retval reason, s64 put)
{
struct xpc_notify *notify;
struct xpc_notify_sn2 *notify;
u8 notify_type;
s64 get = ch->sn.sn2.w_remote_GP.get - 1;
@ -1699,17 +1696,16 @@ xpc_notify_senders_sn2(struct xpc_channel *ch, enum xp_retval reason, s64 put)
atomic_dec(&ch->n_to_notify);
if (notify->func != NULL) {
dev_dbg(xpc_chan, "notify->func() called, notify=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
dev_dbg(xpc_chan, "notify->func() called, notify=0x%p "
"msg_number=%ld partid=%d channel=%d\n",
(void *)notify, get, ch->partid, ch->number);
notify->func(reason, ch->partid, ch->number,
notify->key);
dev_dbg(xpc_chan, "notify->func() returned, "
"notify=0x%p, msg_number=%ld, partid=%d, "
"channel=%d\n", (void *)notify, get,
ch->partid, ch->number);
dev_dbg(xpc_chan, "notify->func() returned, notify=0x%p"
" msg_number=%ld partid=%d channel=%d\n",
(void *)notify, get, ch->partid, ch->number);
}
}
}
@ -1727,14 +1723,14 @@ static inline void
xpc_clear_local_msgqueue_flags_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg;
struct xpc_msg_sn2 *msg;
s64 get;
get = ch_sn2->w_remote_GP.get;
do {
msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(get % ch->local_nentries) *
ch->msg_size);
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
(get % ch->local_nentries) *
ch->entry_size);
msg->flags = 0;
} while (++get < ch_sn2->remote_GP.get);
}
@ -1746,24 +1742,30 @@ static inline void
xpc_clear_remote_msgqueue_flags_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg;
struct xpc_msg_sn2 *msg;
s64 put;
put = ch_sn2->w_remote_GP.put;
do {
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
(put % ch->remote_nentries) *
ch->msg_size);
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
(put % ch->remote_nentries) *
ch->entry_size);
msg->flags = 0;
} while (++put < ch_sn2->remote_GP.put);
}
static int
xpc_n_of_deliverable_payloads_sn2(struct xpc_channel *ch)
{
return ch->sn.sn2.w_remote_GP.put - ch->sn.sn2.w_local_GP.get;
}
static void
xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number)
{
struct xpc_channel *ch = &part->channels[ch_number];
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
int nmsgs_sent;
int npayloads_sent;
ch_sn2->remote_GP = part->sn.sn2.remote_GPs[ch_number];
@ -1835,7 +1837,7 @@ xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number)
if (ch_sn2->w_remote_GP.put != ch_sn2->remote_GP.put) {
/*
* Clear msg->flags in previously received messages, so that
* they're ready for xpc_get_deliverable_msg().
* they're ready for xpc_get_deliverable_payload_sn2().
*/
xpc_clear_remote_msgqueue_flags_sn2(ch);
@ -1845,27 +1847,27 @@ xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number)
"channel=%d\n", ch_sn2->w_remote_GP.put, ch->partid,
ch->number);
nmsgs_sent = ch_sn2->w_remote_GP.put - ch_sn2->w_local_GP.get;
if (nmsgs_sent > 0) {
npayloads_sent = xpc_n_of_deliverable_payloads_sn2(ch);
if (npayloads_sent > 0) {
dev_dbg(xpc_chan, "msgs waiting to be copied and "
"delivered=%d, partid=%d, channel=%d\n",
nmsgs_sent, ch->partid, ch->number);
npayloads_sent, ch->partid, ch->number);
if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
xpc_activate_kthreads(ch, nmsgs_sent);
xpc_activate_kthreads(ch, npayloads_sent);
}
}
xpc_msgqueue_deref(ch);
}
static struct xpc_msg *
static struct xpc_msg_sn2 *
xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
{
struct xpc_partition *part = &xpc_partitions[ch->partid];
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
unsigned long remote_msg_pa;
struct xpc_msg *msg;
struct xpc_msg_sn2 *msg;
u32 msg_index;
u32 nmsgs;
u64 msg_offset;
@ -1889,13 +1891,13 @@ xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
nmsgs = ch->remote_nentries - msg_index;
}
msg_offset = msg_index * ch->msg_size;
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
msg_offset = msg_index * ch->entry_size;
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
msg_offset);
remote_msg_pa = ch_sn2->remote_msgqueue_pa + msg_offset;
ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg_pa,
nmsgs * ch->msg_size);
nmsgs * ch->entry_size);
if (ret != xpSuccess) {
dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
@ -1915,26 +1917,21 @@ xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
mutex_unlock(&ch_sn2->msg_to_pull_mutex);
/* return the message we were looking for */
msg_offset = (get % ch->remote_nentries) * ch->msg_size;
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue + msg_offset);
msg_offset = (get % ch->remote_nentries) * ch->entry_size;
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue + msg_offset);
return msg;
}
static int
xpc_n_of_deliverable_msgs_sn2(struct xpc_channel *ch)
{
return ch->sn.sn2.w_remote_GP.put - ch->sn.sn2.w_local_GP.get;
}
/*
* Get a message to be delivered.
* Get the next deliverable message's payload.
*/
static struct xpc_msg *
xpc_get_deliverable_msg_sn2(struct xpc_channel *ch)
static void *
xpc_get_deliverable_payload_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg = NULL;
struct xpc_msg_sn2 *msg;
void *payload = NULL;
s64 get;
do {
@ -1965,15 +1962,16 @@ xpc_get_deliverable_msg_sn2(struct xpc_channel *ch)
msg = xpc_pull_remote_msg_sn2(ch, get);
DBUG_ON(msg != NULL && msg->number != get);
DBUG_ON(msg != NULL && (msg->flags & XPC_M_DONE));
DBUG_ON(msg != NULL && !(msg->flags & XPC_M_READY));
DBUG_ON(msg != NULL && (msg->flags & XPC_M_SN2_DONE));
DBUG_ON(msg != NULL && !(msg->flags & XPC_M_SN2_READY));
payload = &msg->payload;
break;
}
} while (1);
return msg;
return payload;
}
/*
@ -1985,7 +1983,7 @@ static void
xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg;
struct xpc_msg_sn2 *msg;
s64 put = initial_put + 1;
int send_msgrequest = 0;
@ -1995,11 +1993,12 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
if (put == ch_sn2->w_local_GP.put)
break;
msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) *
ch->msg_size);
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
local_msgqueue + (put %
ch->local_nentries) *
ch->entry_size);
if (!(msg->flags & XPC_M_READY))
if (!(msg->flags & XPC_M_SN2_READY))
break;
put++;
@ -2026,7 +2025,7 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
/*
* We need to ensure that the message referenced by
* local_GP->put is not XPC_M_READY or that local_GP->put
* local_GP->put is not XPC_M_SN2_READY or that local_GP->put
* equals w_local_GP.put, so we'll go have a look.
*/
initial_put = put;
@ -2042,10 +2041,10 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
*/
static enum xp_retval
xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
struct xpc_msg **address_of_msg)
struct xpc_msg_sn2 **address_of_msg)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg;
struct xpc_msg_sn2 *msg;
enum xp_retval ret;
s64 put;
@ -2097,8 +2096,9 @@ xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
}
/* get the message's address and initialize it */
msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) * ch->msg_size);
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) *
ch->entry_size);
DBUG_ON(msg->flags != 0);
msg->number = put;
@ -2117,20 +2117,20 @@ xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
* partition the message is being sent to.
*/
static enum xp_retval
xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
u16 payload_size, u8 notify_type, xpc_notify_func func,
void *key)
xpc_send_payload_sn2(struct xpc_channel *ch, u32 flags, void *payload,
u16 payload_size, u8 notify_type, xpc_notify_func func,
void *key)
{
enum xp_retval ret = xpSuccess;
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg = msg;
struct xpc_notify *notify = notify;
struct xpc_msg_sn2 *msg = msg;
struct xpc_notify_sn2 *notify = notify;
s64 msg_number;
s64 put;
DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
if (XPC_MSG_SIZE(payload_size) > ch->msg_size)
if (XPC_MSG_SIZE(payload_size) > ch->entry_size)
return xpPayloadTooBig;
xpc_msgqueue_ref(ch);
@ -2155,7 +2155,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
* Tell the remote side to send an ACK interrupt when the
* message has been delivered.
*/
msg->flags |= XPC_M_INTERRUPT;
msg->flags |= XPC_M_SN2_INTERRUPT;
atomic_inc(&ch->n_to_notify);
@ -2185,7 +2185,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
memcpy(&msg->payload, payload, payload_size);
msg->flags |= XPC_M_READY;
msg->flags |= XPC_M_SN2_READY;
/*
* The preceding store of msg->flags must occur before the following
@ -2208,12 +2208,15 @@ xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
* Now we actually acknowledge the messages that have been delivered and ack'd
* by advancing the cached remote message queue's Get value and if requested
* send a chctl msgrequest to the message sender's partition.
*
* If a message has XPC_M_SN2_INTERRUPT set, send an interrupt to the partition
* that sent the message.
*/
static void
xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg;
struct xpc_msg_sn2 *msg;
s64 get = initial_get + 1;
int send_msgrequest = 0;
@ -2223,11 +2226,12 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
if (get == ch_sn2->w_local_GP.get)
break;
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
(get % ch->remote_nentries) *
ch->msg_size);
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
remote_msgqueue + (get %
ch->remote_nentries) *
ch->entry_size);
if (!(msg->flags & XPC_M_DONE))
if (!(msg->flags & XPC_M_SN2_DONE))
break;
msg_flags |= msg->flags;
@ -2251,11 +2255,11 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
dev_dbg(xpc_chan, "local_GP->get changed to %ld, partid=%d, "
"channel=%d\n", get, ch->partid, ch->number);
send_msgrequest = (msg_flags & XPC_M_INTERRUPT);
send_msgrequest = (msg_flags & XPC_M_SN2_INTERRUPT);
/*
* We need to ensure that the message referenced by
* local_GP->get is not XPC_M_DONE or that local_GP->get
* local_GP->get is not XPC_M_SN2_DONE or that local_GP->get
* equals w_local_GP.get, so we'll go have a look.
*/
initial_get = get;
@ -2266,19 +2270,23 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
}
static void
xpc_received_msg_sn2(struct xpc_channel *ch, struct xpc_msg *msg)
xpc_received_payload_sn2(struct xpc_channel *ch, void *payload)
{
struct xpc_msg_sn2 *msg;
s64 msg_number;
s64 get;
s64 msg_number = msg->number;
msg = container_of(payload, struct xpc_msg_sn2, payload);
msg_number = msg->number;
dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
(void *)msg, msg_number, ch->partid, ch->number);
DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->msg_size) !=
DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->entry_size) !=
msg_number % ch->remote_nentries);
DBUG_ON(msg->flags & XPC_M_DONE);
DBUG_ON(msg->flags & XPC_M_SN2_DONE);
msg->flags |= XPC_M_DONE;
msg->flags |= XPC_M_SN2_DONE;
/*
* The preceding store of msg->flags must occur before the following
@ -2337,8 +2345,8 @@ xpc_init_sn2(void)
xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2;
xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2;
xpc_n_of_deliverable_msgs = xpc_n_of_deliverable_msgs_sn2;
xpc_get_deliverable_msg = xpc_get_deliverable_msg_sn2;
xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_sn2;
xpc_get_deliverable_payload = xpc_get_deliverable_payload_sn2;
xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_sn2;
xpc_indicate_partition_disengaged =
@ -2347,8 +2355,14 @@ xpc_init_sn2(void)
xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_sn2;
xpc_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_msg_sn2;
xpc_send_payload = xpc_send_payload_sn2;
xpc_received_payload = xpc_received_payload_sn2;
if (offsetof(struct xpc_msg_sn2, payload) > XPC_MSG_HDR_MAX_SIZE) {
dev_err(xpc_part, "header portion of struct xpc_msg_sn2 is "
"larger than %d\n", XPC_MSG_HDR_MAX_SIZE);
return -E2BIG;
}
buf_size = max(XPC_RP_VARS_SIZE,
XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES_SN2);

969
drivers/misc/sgi-xp/xpc_uv.c
View File

File diff suppressed because it is too large Load Diff

11
drivers/misc/sgi-xp/xpnet.c
View File

@ -57,11 +57,10 @@ struct xpnet_message {
*
* XPC expects each message to exist in an individual cacheline.
*/
#define XPNET_MSG_SIZE (L1_CACHE_BYTES - XPC_MSG_PAYLOAD_OFFSET)
#define XPNET_MSG_SIZE XPC_MSG_PAYLOAD_MAX_SIZE
#define XPNET_MSG_DATA_MAX \
(XPNET_MSG_SIZE - (u64)(&((struct xpnet_message *)0)->data))
#define XPNET_MSG_ALIGNED_SIZE (L1_CACHE_ALIGN(XPNET_MSG_SIZE))
#define XPNET_MSG_NENTRIES (PAGE_SIZE / XPNET_MSG_ALIGNED_SIZE)
(XPNET_MSG_SIZE - offsetof(struct xpnet_message, data))
#define XPNET_MSG_NENTRIES (PAGE_SIZE / XPC_MSG_MAX_SIZE)
#define XPNET_MAX_KTHREADS (XPNET_MSG_NENTRIES + 1)
#define XPNET_MAX_IDLE_KTHREADS (XPNET_MSG_NENTRIES + 1)
@ -408,6 +407,7 @@ xpnet_send(struct sk_buff *skb, struct xpnet_pending_msg *queued_msg,
{
u8 msg_buffer[XPNET_MSG_SIZE];
struct xpnet_message *msg = (struct xpnet_message *)&msg_buffer;
u16 msg_size = sizeof(struct xpnet_message);
enum xp_retval ret;
msg->embedded_bytes = embedded_bytes;
@ -417,6 +417,7 @@ xpnet_send(struct sk_buff *skb, struct xpnet_pending_msg *queued_msg,
&msg->data, skb->data, (size_t)embedded_bytes);
skb_copy_from_linear_data(skb, &msg->data,
(size_t)embedded_bytes);
msg_size += embedded_bytes - 1;
} else {
msg->version = XPNET_VERSION;
}
@ -435,7 +436,7 @@ xpnet_send(struct sk_buff *skb, struct xpnet_pending_msg *queued_msg,
atomic_inc(&queued_msg->use_count);
ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT, msg,
XPNET_MSG_SIZE, xpnet_send_completed, queued_msg);
msg_size, xpnet_send_completed, queued_msg);
if (unlikely(ret != xpSuccess))
atomic_dec(&queued_msg->use_count);
}