{
/* see if kzalloc will give us cachline aligned memory by default */
*base = kzalloc(size, flags);
- if (*base == NULL) {
+ if (*base == NULL)
return NULL;
- }
- if ((u64)*base == L1_CACHE_ALIGN((u64)*base)) {
+
+ if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
return *base;
- }
+
kfree(*base);
/* nope, we'll have to do it ourselves */
*base = kzalloc(size + L1_CACHE_BYTES, flags);
- if (*base == NULL) {
+ if (*base == NULL)
return NULL;
- }
+
return (void *)L1_CACHE_ALIGN((u64)*base);
}
* Set up the initial values for the XPartition Communication channels.
*/
static void
-xpc_initialize_channels(struct xpc_partition *part, partid_t partid)
+xpc_initialize_channels(struct xpc_partition *part, short partid)
{
int ch_number;
struct xpc_channel *ch;
* Setup the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
*/
-enum xpc_retval
+enum xp_retval
xpc_setup_infrastructure(struct xpc_partition *part)
{
int ret, cpuid;
struct timer_list *timer;
- partid_t partid = XPC_PARTID(part);
+ short partid = XPC_PARTID(part);
/*
* Zero out MOST of the entry for this partition. Only the fields
GFP_KERNEL);
if (part->channels == NULL) {
dev_err(xpc_chan, "can't get memory for channels\n");
- return xpcNoMemory;
+ return xpNoMemory;
}
part->nchannels = XPC_NCHANNELS;
part->channels = NULL;
dev_err(xpc_chan, "can't get memory for local get/put "
"values\n");
- return xpcNoMemory;
+ return xpNoMemory;
}
part->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcNoMemory;
+ return xpNoMemory;
}
/* allocate all the required open and close args */
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcNoMemory;
+ return xpNoMemory;
}
part->remote_openclose_args =
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcNoMemory;
+ return xpNoMemory;
}
xpc_initialize_channels(part, partid);
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcLackOfResources;
+ return xpLackOfResources;
}
/* Setup a timer to check for dropped IPIs */
xpc_vars_part[partid].nchannels = part->nchannels;
xpc_vars_part[partid].magic = XPC_VP_MAGIC1;
- return xpcSuccess;
+ return xpSuccess;
}
/*
* dst must be a cacheline aligned virtual address on this partition.
* cnt must be an cacheline sized
*/
-static enum xpc_retval
+static enum xp_retval
xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
const void *src, size_t cnt)
{
DBUG_ON((u64)dst != L1_CACHE_ALIGN((u64)dst));
DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_DEACTIVATING)
return part->reason;
- }
bte_ret = xp_bte_copy((u64)src, (u64)dst, (u64)cnt,
(BTE_NORMAL | BTE_WACQUIRE), NULL);
- if (bte_ret == BTE_SUCCESS) {
- return xpcSuccess;
- }
+ if (bte_ret == BTE_SUCCESS)
+ return xpSuccess;
dev_dbg(xpc_chan, "xp_bte_copy() from partition %d failed, ret=%d\n",
XPC_PARTID(part), bte_ret);
* Pull the remote per partition specific variables from the specified
* partition.
*/
-enum xpc_retval
+enum xp_retval
xpc_pull_remote_vars_part(struct xpc_partition *part)
{
u8 buffer[L1_CACHE_BYTES * 2];
(struct xpc_vars_part *)L1_CACHE_ALIGN((u64)buffer);
struct xpc_vars_part *pulled_entry;
u64 remote_entry_cacheline_pa, remote_entry_pa;
- partid_t partid = XPC_PARTID(part);
- enum xpc_retval ret;
+ short partid = XPC_PARTID(part);
+ enum xp_retval ret;
/* pull the cacheline that contains the variables we're interested in */
ret = xpc_pull_remote_cachelines(part, pulled_entry_cacheline,
(void *)remote_entry_cacheline_pa,
L1_CACHE_BYTES);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
"partition %d, ret=%d\n", partid, ret);
return ret;
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
"partition %d has bad magic value (=0x%lx)\n",
partid, sn_partition_id, pulled_entry->magic);
- return xpcBadMagic;
+ return xpBadMagic;
}
/* they've not been initialized yet */
- return xpcRetry;
+ return xpRetry;
}
if (xpc_vars_part[partid].magic == XPC_VP_MAGIC1) {
dev_err(xpc_chan, "partition %d's XPC vars_part for "
"partition %d are not valid\n", partid,
sn_partition_id);
- return xpcInvalidAddress;
+ return xpInvalidAddress;
}
/* the variables we imported look to be valid */
part->remote_IPI_nasid = pulled_entry->IPI_nasid;
part->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid;
- if (part->nchannels > pulled_entry->nchannels) {
+ if (part->nchannels > pulled_entry->nchannels)
part->nchannels = pulled_entry->nchannels;
- }
/* let the other side know that we've pulled their variables */
xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
}
- if (pulled_entry->magic == XPC_VP_MAGIC1) {
- return xpcRetry;
- }
+ if (pulled_entry->magic == XPC_VP_MAGIC1)
+ return xpRetry;
- return xpcSuccess;
+ return xpSuccess;
}
/*
{
unsigned long irq_flags;
u64 IPI_amo;
- enum xpc_retval ret;
+ enum xp_retval ret;
/*
* See if there are any IPI flags to be handled.
*/
spin_lock_irqsave(&part->IPI_lock, irq_flags);
- if ((IPI_amo = part->local_IPI_amo) != 0) {
+ IPI_amo = part->local_IPI_amo;
+ if (IPI_amo != 0)
part->local_IPI_amo = 0;
- }
+
spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) {
(void *)part->
remote_openclose_args_pa,
XPC_OPENCLOSE_ARGS_SIZE);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
dev_dbg(xpc_chan, "failed to pull openclose args from "
ret = xpc_pull_remote_cachelines(part, part->remote_GPs,
(void *)part->remote_GPs_pa,
XPC_GP_SIZE);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
dev_dbg(xpc_chan, "failed to pull GPs from partition "
/*
* Allocate the local message queue and the notify queue.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_local_msgqueue(struct xpc_channel *ch)
{
unsigned long irq_flags;
int nentries;
size_t nbytes;
- // >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
- // >>> iterations of the for-loop, bail if set?
-
- // >>> should we impose a minimum #of entries? like 4 or 8?
for (nentries = ch->local_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
ch->local_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
GFP_KERNEL,
- &ch->
- local_msgqueue_base);
- if (ch->local_msgqueue == NULL) {
+ &ch->local_msgqueue_base);
+ if (ch->local_msgqueue == NULL)
continue;
- }
nbytes = nentries * sizeof(struct xpc_notify);
ch->notify_queue = kzalloc(nbytes, GFP_KERNEL);
ch->local_nentries = nentries;
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcSuccess;
+ return xpSuccess;
}
dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
"queue, partid=%d, channel=%d\n", ch->partid, ch->number);
- return xpcNoMemory;
+ return xpNoMemory;
}
/*
* Allocate the cached remote message queue.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
{
unsigned long irq_flags;
DBUG_ON(ch->remote_nentries <= 0);
- // >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
- // >>> iterations of the for-loop, bail if set?
-
- // >>> should we impose a minimum #of entries? like 4 or 8?
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
ch->remote_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
GFP_KERNEL,
- &ch->
- remote_msgqueue_base);
- if (ch->remote_msgqueue == NULL) {
+ &ch->remote_msgqueue_base);
+ if (ch->remote_msgqueue == NULL)
continue;
- }
spin_lock_irqsave(&ch->lock, irq_flags);
if (nentries < ch->remote_nentries) {
ch->remote_nentries = nentries;
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcSuccess;
+ return xpSuccess;
}
dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
- return xpcNoMemory;
+ return xpNoMemory;
}
/*
*
* Note: Assumes all of the channel sizes are filled in.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_msgqueues(struct xpc_channel *ch)
{
unsigned long irq_flags;
- enum xpc_retval ret;
+ enum xp_retval ret;
DBUG_ON(ch->flags & XPC_C_SETUP);
- if ((ret = xpc_allocate_local_msgqueue(ch)) != xpcSuccess) {
+ ret = xpc_allocate_local_msgqueue(ch);
+ if (ret != xpSuccess)
return ret;
- }
- if ((ret = xpc_allocate_remote_msgqueue(ch)) != xpcSuccess) {
+ ret = xpc_allocate_remote_msgqueue(ch);
+ if (ret != xpSuccess) {
kfree(ch->local_msgqueue_base);
ch->local_msgqueue = NULL;
kfree(ch->notify_queue);
ch->flags |= XPC_C_SETUP;
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcSuccess;
+ return xpSuccess;
}
/*
static void
xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
{
- enum xpc_retval ret;
+ enum xp_retval ret;
DBUG_ON(!spin_is_locked(&ch->lock));
ret = xpc_allocate_msgqueues(ch);
spin_lock_irqsave(&ch->lock, *irq_flags);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess)
XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
- }
- if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING)) {
+
+ if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING))
return;
- }
DBUG_ON(!(ch->flags & XPC_C_SETUP));
DBUG_ON(ch->local_msgqueue == NULL);
xpc_IPI_send_openreply(ch, irq_flags);
}
- if (!(ch->flags & XPC_C_ROPENREPLY)) {
+ if (!(ch->flags & XPC_C_ROPENREPLY))
return;
- }
DBUG_ON(ch->remote_msgqueue_pa == 0);
* Notify those who wanted to be notified upon delivery of their message.
*/
static void
-xpc_notify_senders(struct xpc_channel *ch, enum xpc_retval reason, s64 put)
+xpc_notify_senders(struct xpc_channel *ch, enum xp_retval reason, s64 put)
{
struct xpc_notify *notify;
u8 notify_type;
DBUG_ON(!spin_is_locked(&ch->lock));
- if (!(ch->flags & XPC_C_DISCONNECTING)) {
+ if (!(ch->flags & XPC_C_DISCONNECTING))
return;
- }
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
if (part->act_state == XPC_P_DEACTIVATING) {
/* can't proceed until the other side disengages from us */
- if (xpc_partition_engaged(1UL << ch->partid)) {
+ if (xpc_partition_engaged(1UL << ch->partid))
return;
- }
} else {
/* as long as the other side is up do the full protocol */
- if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
+ if (!(ch->flags & XPC_C_RCLOSEREQUEST))
return;
- }
if (!(ch->flags & XPC_C_CLOSEREPLY)) {
ch->flags |= XPC_C_CLOSEREPLY;
xpc_IPI_send_closereply(ch, irq_flags);
}
- if (!(ch->flags & XPC_C_RCLOSEREPLY)) {
+ if (!(ch->flags & XPC_C_RCLOSEREPLY))
return;
- }
}
/* wake those waiting for notify completion */
if (ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE) {
spin_unlock_irqrestore(&ch->lock, *irq_flags);
- xpc_disconnect_callout(ch, xpcDisconnected);
+ xpc_disconnect_callout(ch, xpDisconnected);
spin_lock_irqsave(&ch->lock, *irq_flags);
}
struct xpc_openclose_args *args =
&part->remote_openclose_args[ch_number];
struct xpc_channel *ch = &part->channels[ch_number];
- enum xpc_retval reason;
+ enum xp_retval reason;
spin_lock_irqsave(&ch->lock, irq_flags);
- again:
+again:
- if ((ch->flags & XPC_C_DISCONNECTED) && (ch->flags & XPC_C_WDISCONNECT)) {
+ if ((ch->flags & XPC_C_DISCONNECTED) &&
+ (ch->flags & XPC_C_WDISCONNECT)) {
/*
* Delay processing IPI flags until thread waiting disconnect
* has had a chance to see that the channel is disconnected.
if (!(ch->flags & XPC_C_DISCONNECTING)) {
reason = args->reason;
- if (reason <= xpcSuccess || reason > xpcUnknownReason) {
- reason = xpcUnknownReason;
- } else if (reason == xpcUnregistering) {
- reason = xpcOtherUnregistering;
- }
+ if (reason <= xpSuccess || reason > xpUnknownReason)
+ reason = xpUnknownReason;
+ else if (reason == xpUnregistering)
+ reason = xpOtherUnregistering;
XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
if (ch->flags & XPC_C_OPENREQUEST) {
if (args->msg_size != ch->msg_size) {
- XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
+ XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
return;
}
if (!(ch->flags & XPC_C_OPENREQUEST)) {
- XPC_DISCONNECT_CHANNEL(ch, xpcOpenCloseError,
+ XPC_DISCONNECT_CHANNEL(ch, xpOpenCloseError,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
/*
* Attempt to establish a channel connection to a remote partition.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_connect_channel(struct xpc_channel *ch)
{
unsigned long irq_flags;
struct xpc_registration *registration = &xpc_registrations[ch->number];
- if (mutex_trylock(®istration->mutex) == 0) {
- return xpcRetry;
- }
+ if (mutex_trylock(®istration->mutex) == 0)
+ return xpRetry;
if (!XPC_CHANNEL_REGISTERED(ch->number)) {
mutex_unlock(®istration->mutex);
- return xpcUnregistered;
+ return xpUnregistered;
}
spin_lock_irqsave(&ch->lock, irq_flags);
* the channel lock as needed.
*/
mutex_unlock(®istration->mutex);
- XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
+ XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcUnequalMsgSizes;
+ return xpUnequalMsgSizes;
}
} else {
ch->msg_size = registration->msg_size;
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcSuccess;
+ return xpSuccess;
}
/*
(get % ch->local_nentries) *
ch->msg_size);
msg->flags = 0;
- } while (++get < (volatile s64)ch->remote_GP.get);
+ } while (++get < ch->remote_GP.get);
}
/*
(put % ch->remote_nentries) *
ch->msg_size);
msg->flags = 0;
- } while (++put < (volatile s64)ch->remote_GP.put);
+ } while (++put < ch->remote_GP.put);
}
static void
* Notify senders that messages sent have been
* received and delivered by the other side.
*/
- xpc_notify_senders(ch, xpcMsgDelivered,
+ xpc_notify_senders(ch, xpMsgDelivered,
ch->remote_GP.get);
}
* If anyone was waiting for message queue entries to become
* available, wake them up.
*/
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+ if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
wake_up(&ch->msg_allocate_wq);
- }
}
/*
"delivered=%d, partid=%d, channel=%d\n",
nmsgs_sent, ch->partid, ch->number);
- if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
+ if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
xpc_activate_kthreads(ch, nmsgs_sent);
- }
}
}
IPI_flags = XPC_GET_IPI_FLAGS(IPI_amo, ch_number);
- if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags)) {
+ if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags))
xpc_process_openclose_IPI(part, ch_number, IPI_flags);
- }
ch_flags = ch->flags; /* need an atomic snapshot of flags */
continue;
}
- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_DEACTIVATING)
continue;
- }
if (!(ch_flags & XPC_C_CONNECTED)) {
if (!(ch_flags & XPC_C_OPENREQUEST)) {
* from the other partition.
*/
- if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags)) {
+ if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags))
xpc_process_msg_IPI(part, ch_number);
- }
}
}
* at the same time.
*/
void
-xpc_partition_going_down(struct xpc_partition *part, enum xpc_retval reason)
+xpc_partition_going_down(struct xpc_partition *part, enum xp_retval reason)
{
unsigned long irq_flags;
int ch_number;
void
xpc_teardown_infrastructure(struct xpc_partition *part)
{
- partid_t partid = XPC_PARTID(part);
+ short partid = XPC_PARTID(part);
/*
* We start off by making this partition inaccessible to local
void
xpc_initiate_connect(int ch_number)
{
- partid_t partid;
+ short partid;
struct xpc_partition *part;
struct xpc_channel *ch;
/* let the registerer know that a connection has been established */
if (ch->func != NULL) {
- dev_dbg(xpc_chan, "ch->func() called, reason=xpcConnected, "
+ dev_dbg(xpc_chan, "ch->func() called, reason=xpConnected, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
- ch->func(xpcConnected, ch->partid, ch->number,
+ ch->func(xpConnected, ch->partid, ch->number,
(void *)(u64)ch->local_nentries, ch->key);
- dev_dbg(xpc_chan, "ch->func() returned, reason=xpcConnected, "
+ dev_dbg(xpc_chan, "ch->func() returned, reason=xpConnected, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
}
}
xpc_initiate_disconnect(int ch_number)
{
unsigned long irq_flags;
- partid_t partid;
+ short partid;
struct xpc_partition *part;
struct xpc_channel *ch;
if (!(ch->flags & XPC_C_DISCONNECTED)) {
ch->flags |= XPC_C_WDISCONNECT;
- XPC_DISCONNECT_CHANNEL(ch, xpcUnregistering,
+ XPC_DISCONNECT_CHANNEL(ch, xpUnregistering,
&irq_flags);
}
*/
void
xpc_disconnect_channel(const int line, struct xpc_channel *ch,
- enum xpc_retval reason, unsigned long *irq_flags)
+ enum xp_retval reason, unsigned long *irq_flags)
{
u32 channel_was_connected = (ch->flags & XPC_C_CONNECTED);
DBUG_ON(!spin_is_locked(&ch->lock));
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
+ if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
return;
- }
+
DBUG_ON(!(ch->flags & (XPC_C_CONNECTING | XPC_C_CONNECTED)));
dev_dbg(xpc_chan, "reason=%d, line=%d, partid=%d, channel=%d\n",
xpc_IPI_send_closerequest(ch, irq_flags);
- if (channel_was_connected) {
+ if (channel_was_connected)
ch->flags |= XPC_C_WASCONNECTED;
- }
spin_unlock_irqrestore(&ch->lock, *irq_flags);
} else if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
- /* start a kthread that will do the xpcDisconnecting callout */
+ /* start a kthread that will do the xpDisconnecting callout */
xpc_create_kthreads(ch, 1, 1);
}
/* wake those waiting to allocate an entry from the local msg queue */
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+ if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
wake_up(&ch->msg_allocate_wq);
- }
spin_lock_irqsave(&ch->lock, *irq_flags);
}
void
-xpc_disconnect_callout(struct xpc_channel *ch, enum xpc_retval reason)
+xpc_disconnect_callout(struct xpc_channel *ch, enum xp_retval reason)
{
/*
* Let the channel's registerer know that the channel is being
* Wait for a message entry to become available for the specified channel,
* but don't wait any longer than 1 jiffy.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_msg_wait(struct xpc_channel *ch)
{
- enum xpc_retval ret;
+ enum xp_retval ret;
if (ch->flags & XPC_C_DISCONNECTING) {
- DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
+ DBUG_ON(ch->reason == xpInterrupted);
return ch->reason;
}
if (ch->flags & XPC_C_DISCONNECTING) {
ret = ch->reason;
- DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
+ DBUG_ON(ch->reason == xpInterrupted);
} else if (ret == 0) {
- ret = xpcTimeout;
+ ret = xpTimeout;
} else {
- ret = xpcInterrupted;
+ ret = xpInterrupted;
}
return ret;
* Allocate an entry for a message from the message queue associated with the
* specified channel.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
struct xpc_msg **address_of_msg)
{
struct xpc_msg *msg;
- enum xpc_retval ret;
+ enum xp_retval ret;
s64 put;
/* this reference will be dropped in xpc_send_msg() */
}
if (!(ch->flags & XPC_C_CONNECTED)) {
xpc_msgqueue_deref(ch);
- return xpcNotConnected;
+ return xpNotConnected;
}
/*
* If none are available, we'll make sure that we grab the latest
* GP values.
*/
- ret = xpcTimeout;
+ ret = xpTimeout;
while (1) {
- put = (volatile s64)ch->w_local_GP.put;
- if (put - (volatile s64)ch->w_remote_GP.get <
- ch->local_nentries) {
+ put = ch->w_local_GP.put;
+ rmb(); /* guarantee that .put loads before .get */
+ if (put - ch->w_remote_GP.get < ch->local_nentries) {
/* There are available message entries. We need to try
* to secure one for ourselves. We'll do this by trying
* that will cause the IPI handler to fetch the latest
* GP values as if an IPI was sent by the other side.
*/
- if (ret == xpcTimeout) {
+ if (ret == xpTimeout)
xpc_IPI_send_local_msgrequest(ch);
- }
if (flags & XPC_NOWAIT) {
xpc_msgqueue_deref(ch);
- return xpcNoWait;
+ return xpNoWait;
}
ret = xpc_allocate_msg_wait(ch);
- if (ret != xpcInterrupted && ret != xpcTimeout) {
+ if (ret != xpInterrupted && ret != xpTimeout) {
xpc_msgqueue_deref(ch);
return ret;
}
*address_of_msg = msg;
- return xpcSuccess;
+ return xpSuccess;
}
/*
* payload - address of the allocated payload area pointer (filled in on
* return) in which the user-defined message is constructed.
*/
-enum xpc_retval
-xpc_initiate_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
+enum xp_retval
+xpc_initiate_allocate(short partid, int ch_number, u32 flags, void **payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
- enum xpc_retval ret = xpcUnknownReason;
+ enum xp_retval ret = xpUnknownReason;
struct xpc_msg *msg = NULL;
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
ret = xpc_allocate_msg(&part->channels[ch_number], flags, &msg);
xpc_part_deref(part);
- if (msg != NULL) {
+ if (msg != NULL)
*payload = &msg->payload;
- }
}
return ret;
while (1) {
while (1) {
- if (put == (volatile s64)ch->w_local_GP.put) {
+ if (put == ch->w_local_GP.put)
break;
- }
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
(put % ch->local_nentries) *
ch->msg_size);
- if (!(msg->flags & XPC_M_READY)) {
+ if (!(msg->flags & XPC_M_READY))
break;
- }
put++;
}
if (cmpxchg_rel(&ch->local_GP->put, initial_put, put) !=
initial_put) {
/* someone else beat us to it */
- DBUG_ON((volatile s64)ch->local_GP->put < initial_put);
+ DBUG_ON(ch->local_GP->put < initial_put);
break;
}
initial_put = put;
}
- if (send_IPI) {
+ if (send_IPI)
xpc_IPI_send_msgrequest(ch);
- }
}
/*
* local message queue's Put value and sends an IPI to the partition the
* message is being sent to.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
xpc_notify_func func, void *key)
{
- enum xpc_retval ret = xpcSuccess;
+ enum xp_retval ret = xpSuccess;
struct xpc_notify *notify = notify;
s64 put, msg_number = msg->number;
notify->key = key;
notify->type = notify_type;
- // >>> is a mb() needed here?
+ /* >>> is a mb() needed here? */
if (ch->flags & XPC_C_DISCONNECTING) {
/*
/* see if the message is next in line to be sent, if so send it */
put = ch->local_GP->put;
- if (put == msg_number) {
+ if (put == msg_number)
xpc_send_msgs(ch, put);
- }
/* drop the reference grabbed in xpc_allocate_msg() */
xpc_msgqueue_deref(ch);
* payload - pointer to the payload area allocated via
* xpc_initiate_allocate().
*/
-enum xpc_retval
-xpc_initiate_send(partid_t partid, int ch_number, void *payload)
+enum xp_retval
+xpc_initiate_send(short partid, int ch_number, void *payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
- enum xpc_retval ret;
+ enum xp_retval ret;
dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
partid, ch_number);
* receipt. THIS FUNCTION MUST BE NON-BLOCKING.
* key - user-defined key to be passed to the function when it's called.
*/
-enum xpc_retval
-xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
+enum xp_retval
+xpc_initiate_send_notify(short partid, int ch_number, void *payload,
xpc_notify_func func, void *key)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
- enum xpc_retval ret;
+ enum xp_retval ret;
dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
partid, ch_number);
struct xpc_msg *remote_msg, *msg;
u32 msg_index, nmsgs;
u64 msg_offset;
- enum xpc_retval ret;
+ enum xp_retval ret;
if (mutex_lock_interruptible(&ch->msg_to_pull_mutex) != 0) {
/* we were interrupted by a signal */
msg_index = ch->next_msg_to_pull % ch->remote_nentries;
- DBUG_ON(ch->next_msg_to_pull >=
- (volatile s64)ch->w_remote_GP.put);
- nmsgs = (volatile s64)ch->w_remote_GP.put -
- ch->next_msg_to_pull;
+ DBUG_ON(ch->next_msg_to_pull >= ch->w_remote_GP.put);
+ nmsgs = ch->w_remote_GP.put - ch->next_msg_to_pull;
if (msg_index + nmsgs > ch->remote_nentries) {
/* ignore the ones that wrap the msg queue for now */
nmsgs = ch->remote_nentries - msg_index;
remote_msg = (struct xpc_msg *)(ch->remote_msgqueue_pa +
msg_offset);
- if ((ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
- nmsgs * ch->msg_size)) !=
- xpcSuccess) {
+ ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
+ nmsgs * ch->msg_size);
+ if (ret != xpSuccess) {
dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
" msg %ld from partition %d, channel=%d, "
return NULL;
}
- mb(); /* >>> this may not be needed, we're not sure */
-
ch->next_msg_to_pull += nmsgs;
}
s64 get;
do {
- if ((volatile u32)ch->flags & XPC_C_DISCONNECTING) {
+ if (ch->flags & XPC_C_DISCONNECTING)
break;
- }
- get = (volatile s64)ch->w_local_GP.get;
- if (get == (volatile s64)ch->w_remote_GP.put) {
+ get = ch->w_local_GP.get;
+ rmb(); /* guarantee that .get loads before .put */
+ if (get == ch->w_remote_GP.put)
break;
- }
/* There are messages waiting to be pulled and delivered.
* We need to try to secure one for ourselves. We'll do this
{
struct xpc_msg *msg;
- if ((msg = xpc_get_deliverable_msg(ch)) != NULL) {
+ msg = xpc_get_deliverable_msg(ch);
+ if (msg != NULL) {
/*
* This ref is taken to protect the payload itself from being
ch->number);
/* deliver the message to its intended recipient */
- ch->func(xpcMsgReceived, ch->partid, ch->number,
+ ch->func(xpMsgReceived, ch->partid, ch->number,
&msg->payload, ch->key);
dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
while (1) {
while (1) {
- if (get == (volatile s64)ch->w_local_GP.get) {
+ if (get == ch->w_local_GP.get)
break;
- }
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
(get % ch->remote_nentries) *
ch->msg_size);
- if (!(msg->flags & XPC_M_DONE)) {
+ if (!(msg->flags & XPC_M_DONE))
break;
- }
msg_flags |= msg->flags;
get++;
if (cmpxchg_rel(&ch->local_GP->get, initial_get, get) !=
initial_get) {
/* someone else beat us to it */
- DBUG_ON((volatile s64)ch->local_GP->get <= initial_get);
+ DBUG_ON(ch->local_GP->get <= initial_get);
break;
}
initial_get = get;
}
- if (send_IPI) {
+ if (send_IPI)
xpc_IPI_send_msgrequest(ch);
- }
}
/*
* xpc_initiate_allocate().
*/
void
-xpc_initiate_received(partid_t partid, int ch_number, void *payload)
+xpc_initiate_received(short partid, int ch_number, void *payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_channel *ch;
* been delivered.
*/
get = ch->local_GP->get;
- if (get == msg_number) {
+ if (get == msg_number)
xpc_acknowledge_msgs(ch, get, msg->flags);
- }
/* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg() */
xpc_msgqueue_deref(ch);
projects / linux-2.6 / blobdiff