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Commit 35190506 authored by Dean Nelson's avatar Dean Nelson Committed by Tony Luck
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[IA64] run rest drivers/misc/sgi-xp through scripts/Lindent 

Ran patches through scripts/Lindent (part 2).
Signed-off-by: default avatarDean Nelson <dcn@sgi.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 4a3ad2dd
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Showing with 322 additions and 506 deletions
drivers/misc/sgi-xp/xpc_channel.c
View file @ 35190506
......@@ -6,7 +6,6 @@
* Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
/*
* Cross Partition Communication (XPC) channel support.
*
......@@ -15,7 +14,6 @@
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
......@@ -27,7 +25,6 @@
#include <asm/sn/sn_sal.h>
#include "xpc.h"
/*
* Guarantee that the kzalloc'd memory is cacheline aligned.
*/
......@@ -39,7 +36,7 @@ xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
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);
......@@ -49,10 +46,9 @@ xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
if (*base == NULL) {
return NULL;
}
return (void *) L1_CACHE_ALIGN((u64) *base);
return (void *)L1_CACHE_ALIGN((u64)*base);
}
/*
* Set up the initial values for the XPartition Communication channels.
*/
......@@ -62,7 +58,6 @@ xpc_initialize_channels(struct xpc_partition *part, partid_t partid)
int ch_number;
struct xpc_channel *ch;
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
......@@ -72,7 +67,7 @@ xpc_initialize_channels(struct xpc_partition *part, partid_t partid)
ch->local_GP = &part->local_GPs[ch_number];
ch->local_openclose_args =
&part->local_openclose_args[ch_number];
&part->local_openclose_args[ch_number];
atomic_set(&ch->kthreads_assigned, 0);
atomic_set(&ch->kthreads_idle, 0);
......@@ -91,7 +86,6 @@ xpc_initialize_channels(struct xpc_partition *part, partid_t partid)
}
}
/*
* Setup the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
......@@ -103,7 +97,6 @@ xpc_setup_infrastructure(struct xpc_partition *part)
struct timer_list *timer;
partid_t partid = XPC_PARTID(part);
/*
* Zero out MOST of the entry for this partition. Only the fields
* starting with `nchannels' will be zeroed. The preceding fields must
......@@ -111,14 +104,14 @@ xpc_setup_infrastructure(struct xpc_partition *part)
* referenced during this memset() operation.
*/
memset(&part->nchannels, 0, sizeof(struct xpc_partition) -
offsetof(struct xpc_partition, nchannels));
offsetof(struct xpc_partition, nchannels));
/*
* Allocate all of the channel structures as a contiguous chunk of
* memory.
*/
part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_NCHANNELS,
GFP_KERNEL);
GFP_KERNEL);
if (part->channels == NULL) {
dev_err(xpc_chan, "can't get memory for channels\n");
return xpcNoMemory;
......@@ -126,11 +119,11 @@ xpc_setup_infrastructure(struct xpc_partition *part)
part->nchannels = XPC_NCHANNELS;
/* allocate all the required GET/PUT values */
part->local_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
GFP_KERNEL, &part->local_GPs_base);
GFP_KERNEL,
&part->local_GPs_base);
if (part->local_GPs == NULL) {
kfree(part->channels);
part->channels = NULL;
......@@ -140,7 +133,9 @@ xpc_setup_infrastructure(struct xpc_partition *part)
}
part->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
GFP_KERNEL, &part->remote_GPs_base);
GFP_KERNEL,
&part->
remote_GPs_base);
if (part->remote_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for remote get/put "
"values\n");
......@@ -151,12 +146,11 @@ xpc_setup_infrastructure(struct xpc_partition *part)
return xpcNoMemory;
}
/* allocate all the required open and close args */
part->local_openclose_args = xpc_kzalloc_cacheline_aligned(
XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
&part->local_openclose_args_base);
part->local_openclose_args =
xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
&part->local_openclose_args_base);
if (part->local_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for local connect args\n");
kfree(part->remote_GPs_base);
......@@ -168,9 +162,9 @@ xpc_setup_infrastructure(struct xpc_partition *part)
return xpcNoMemory;
}
part->remote_openclose_args = xpc_kzalloc_cacheline_aligned(
XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
&part->remote_openclose_args_base);
part->remote_openclose_args =
xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
&part->remote_openclose_args_base);
if (part->remote_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for remote connect args\n");
kfree(part->local_openclose_args_base);
......@@ -184,13 +178,11 @@ xpc_setup_infrastructure(struct xpc_partition *part)
return xpcNoMemory;
}
xpc_initialize_channels(part, partid);
atomic_set(&part->nchannels_active, 0);
atomic_set(&part->nchannels_engaged, 0);
/* local_IPI_amo were set to 0 by an earlier memset() */
/* Initialize this partitions AMO_t structure */
......@@ -203,7 +195,7 @@ xpc_setup_infrastructure(struct xpc_partition *part)
sprintf(part->IPI_owner, "xpc%02d", partid);
ret = request_irq(SGI_XPC_NOTIFY, xpc_notify_IRQ_handler, IRQF_SHARED,
part->IPI_owner, (void *) (u64) partid);
part->IPI_owner, (void *)(u64)partid);
if (ret != 0) {
dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
"errno=%d\n", -ret);
......@@ -223,8 +215,8 @@ xpc_setup_infrastructure(struct xpc_partition *part)
/* Setup a timer to check for dropped IPIs */
timer = &part->dropped_IPI_timer;
init_timer(timer);
timer->function = (void (*)(unsigned long)) xpc_dropped_IPI_check;
timer->data = (unsigned long) part;
timer->function = (void (*)(unsigned long))xpc_dropped_IPI_check;
timer->data = (unsigned long)part;
timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT;
add_timer(timer);
......@@ -234,7 +226,6 @@ xpc_setup_infrastructure(struct xpc_partition *part)
*/
part->setup_state = XPC_P_SETUP;
/*
* Setup the per partition specific variables required by the
* remote partition to establish channel connections with us.
......@@ -244,7 +235,7 @@ xpc_setup_infrastructure(struct xpc_partition *part)
*/
xpc_vars_part[partid].GPs_pa = __pa(part->local_GPs);
xpc_vars_part[partid].openclose_args_pa =
__pa(part->local_openclose_args);
__pa(part->local_openclose_args);
xpc_vars_part[partid].IPI_amo_pa = __pa(part->local_IPI_amo_va);
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(cpuid);
......@@ -255,7 +246,6 @@ xpc_setup_infrastructure(struct xpc_partition *part)
return xpcSuccess;
}
/*
* Create a wrapper that hides the underlying mechanism for pulling a cacheline
* (or multiple cachelines) from a remote partition.
......@@ -266,21 +256,20 @@ xpc_setup_infrastructure(struct xpc_partition *part)
*/
static enum xpc_retval
xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
const void *src, size_t cnt)
const void *src, size_t cnt)
{
bte_result_t bte_ret;
DBUG_ON((u64) src != L1_CACHE_ALIGN((u64) src));
DBUG_ON((u64) dst != L1_CACHE_ALIGN((u64) dst));
DBUG_ON((u64)src != L1_CACHE_ALIGN((u64)src));
DBUG_ON((u64)dst != L1_CACHE_ALIGN((u64)dst));
DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
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);
bte_ret = xp_bte_copy((u64)src, (u64)dst, (u64)cnt,
(BTE_NORMAL | BTE_WACQUIRE), NULL);
if (bte_ret == BTE_SUCCESS) {
return xpcSuccess;
}
......@@ -291,7 +280,6 @@ xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
return xpc_map_bte_errors(bte_ret);
}
/*
* Pull the remote per partition specific variables from the specified
* partition.
......@@ -301,41 +289,40 @@ xpc_pull_remote_vars_part(struct xpc_partition *part)
{
u8 buffer[L1_CACHE_BYTES * 2];
struct xpc_vars_part *pulled_entry_cacheline =
(struct xpc_vars_part *) L1_CACHE_ALIGN((u64) buffer);
(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;
/* pull the cacheline that contains the variables we're interested in */
DBUG_ON(part->remote_vars_part_pa !=
L1_CACHE_ALIGN(part->remote_vars_part_pa));
L1_CACHE_ALIGN(part->remote_vars_part_pa));
DBUG_ON(sizeof(struct xpc_vars_part) != L1_CACHE_BYTES / 2);
remote_entry_pa = part->remote_vars_part_pa +
sn_partition_id * sizeof(struct xpc_vars_part);
sn_partition_id * sizeof(struct xpc_vars_part);
remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
pulled_entry = (struct xpc_vars_part *) ((u64) pulled_entry_cacheline +
(remote_entry_pa & (L1_CACHE_BYTES - 1)));
pulled_entry = (struct xpc_vars_part *)((u64)pulled_entry_cacheline +
(remote_entry_pa &
(L1_CACHE_BYTES - 1)));
ret = xpc_pull_remote_cachelines(part, pulled_entry_cacheline,
(void *) remote_entry_cacheline_pa,
L1_CACHE_BYTES);
(void *)remote_entry_cacheline_pa,
L1_CACHE_BYTES);
if (ret != xpcSuccess) {
dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
"partition %d, ret=%d\n", partid, ret);
return ret;
}
/* see if they've been set up yet */
if (pulled_entry->magic != XPC_VP_MAGIC1 &&
pulled_entry->magic != XPC_VP_MAGIC2) {
pulled_entry->magic != XPC_VP_MAGIC2) {
if (pulled_entry->magic != 0) {
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
......@@ -353,8 +340,8 @@ xpc_pull_remote_vars_part(struct xpc_partition *part)
/* validate the variables */
if (pulled_entry->GPs_pa == 0 ||
pulled_entry->openclose_args_pa == 0 ||
pulled_entry->IPI_amo_pa == 0) {
pulled_entry->openclose_args_pa == 0 ||
pulled_entry->IPI_amo_pa == 0) {
dev_err(xpc_chan, "partition %d's XPC vars_part for "
"partition %d are not valid\n", partid,
......@@ -366,9 +353,9 @@ xpc_pull_remote_vars_part(struct xpc_partition *part)
part->remote_GPs_pa = pulled_entry->GPs_pa;
part->remote_openclose_args_pa =
pulled_entry->openclose_args_pa;
pulled_entry->openclose_args_pa;
part->remote_IPI_amo_va =
(AMO_t *) __va(pulled_entry->IPI_amo_pa);
(AMO_t *)__va(pulled_entry->IPI_amo_pa);
part->remote_IPI_nasid = pulled_entry->IPI_nasid;
part->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid;
......@@ -388,7 +375,6 @@ xpc_pull_remote_vars_part(struct xpc_partition *part)
return xpcSuccess;
}
/*
* Get the IPI flags and pull the openclose args and/or remote GPs as needed.
*/
......@@ -399,7 +385,6 @@ xpc_get_IPI_flags(struct xpc_partition *part)
u64 IPI_amo;
enum xpc_retval ret;
/*
* See if there are any IPI flags to be handled.
*/
......@@ -410,12 +395,12 @@ xpc_get_IPI_flags(struct xpc_partition *part)
}
spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) {
ret = xpc_pull_remote_cachelines(part,
part->remote_openclose_args,
(void *) part->remote_openclose_args_pa,
XPC_OPENCLOSE_ARGS_SIZE);
part->remote_openclose_args,
(void *)part->
remote_openclose_args_pa,
XPC_OPENCLOSE_ARGS_SIZE);
if (ret != xpcSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
......@@ -430,8 +415,8 @@ xpc_get_IPI_flags(struct xpc_partition *part)
if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_amo)) {
ret = xpc_pull_remote_cachelines(part, part->remote_GPs,
(void *) part->remote_GPs_pa,
XPC_GP_SIZE);
(void *)part->remote_GPs_pa,
XPC_GP_SIZE);
if (ret != xpcSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
......@@ -446,7 +431,6 @@ xpc_get_IPI_flags(struct xpc_partition *part)
return IPI_amo;
}
/*
* Allocate the local message queue and the notify queue.
*/
......@@ -457,7 +441,6 @@ xpc_allocate_local_msgqueue(struct xpc_channel *ch)
int nentries;
size_t nbytes;
// >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
// >>> iterations of the for-loop, bail if set?
......@@ -466,8 +449,9 @@ xpc_allocate_local_msgqueue(struct xpc_channel *ch)
nbytes = nentries * ch->msg_size;
ch->local_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
GFP_KERNEL,
&ch->local_msgqueue_base);
GFP_KERNEL,
&ch->
local_msgqueue_base);
if (ch->local_msgqueue == NULL) {
continue;
}
......@@ -497,7 +481,6 @@ xpc_allocate_local_msgqueue(struct xpc_channel *ch)
return xpcNoMemory;
}
/*
* Allocate the cached remote message queue.
*/
......@@ -508,7 +491,6 @@ xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
int nentries;
size_t nbytes;
DBUG_ON(ch->remote_nentries <= 0);
// >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
......@@ -519,8 +501,9 @@ xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
nbytes = nentries * ch->msg_size;
ch->remote_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
GFP_KERNEL,
&ch->remote_msgqueue_base);
GFP_KERNEL,
&ch->
remote_msgqueue_base);
if (ch->remote_msgqueue == NULL) {
continue;
}
......@@ -542,7 +525,6 @@ xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
return xpcNoMemory;
}
/*
* Allocate message queues and other stuff associated with a channel.
*
......@@ -554,7 +536,6 @@ xpc_allocate_msgqueues(struct xpc_channel *ch)
unsigned long irq_flags;
enum xpc_retval ret;
DBUG_ON(ch->flags & XPC_C_SETUP);
if ((ret = xpc_allocate_local_msgqueue(ch)) != xpcSuccess) {
......@@ -576,7 +557,6 @@ xpc_allocate_msgqueues(struct xpc_channel *ch)
return xpcSuccess;
}
/*
* Process a connect message from a remote partition.
*
......@@ -588,11 +568,10 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
{
enum xpc_retval ret;
DBUG_ON(!spin_is_locked(&ch->lock));
if (!(ch->flags & XPC_C_OPENREQUEST) ||
!(ch->flags & XPC_C_ROPENREQUEST)) {
!(ch->flags & XPC_C_ROPENREQUEST)) {
/* nothing more to do for now */
return;
}
......@@ -629,14 +608,13 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
dev_info(xpc_chan, "channel %d to partition %d connected\n",
ch->number, ch->partid);
ch->number, ch->partid);
spin_unlock_irqrestore(&ch->lock, *irq_flags);
xpc_create_kthreads(ch, 1, 0);
spin_lock_irqsave(&ch->lock, *irq_flags);
}
/*
* Notify those who wanted to be notified upon delivery of their message.
*/
......@@ -647,7 +625,6 @@ xpc_notify_senders(struct xpc_channel *ch, enum xpc_retval reason, s64 put)
u8 notify_type;
s64 get = ch->w_remote_GP.get - 1;
while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
notify = &ch->notify_queue[get % ch->local_nentries];
......@@ -660,8 +637,7 @@ xpc_notify_senders(struct xpc_channel *ch, enum xpc_retval reason, s64 put)
*/
notify_type = notify->type;
if (notify_type == 0 ||
cmpxchg(&notify->type, notify_type, 0) !=
notify_type) {
cmpxchg(&notify->type, notify_type, 0) != notify_type) {
continue;
}
......@@ -672,20 +648,19 @@ xpc_notify_senders(struct xpc_channel *ch, enum xpc_retval reason, s64 put)
if (notify->func != NULL) {
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);
(void *)notify, get, ch->partid, ch->number);
notify->func(reason, ch->partid, ch->number,
notify->key);
notify->key);
dev_dbg(xpc_chan, "notify->func() returned, "
"notify=0x%p, msg_number=%ld, partid=%d, "
"channel=%d\n", (void *) notify, get,
"channel=%d\n", (void *)notify, get,
ch->partid, ch->number);
}
}
}
/*
* Free up message queues and other stuff that were allocated for the specified
* channel.
......@@ -733,7 +708,6 @@ xpc_free_msgqueues(struct xpc_channel *ch)
}
}
/*
* spin_lock_irqsave() is expected to be held on entry.
*/
......@@ -743,7 +717,6 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
struct xpc_partition *part = &xpc_partitions[ch->partid];
u32 channel_was_connected = (ch->flags & XPC_C_WASCONNECTED);
DBUG_ON(!spin_is_locked(&ch->lock));
if (!(ch->flags & XPC_C_DISCONNECTING)) {
......@@ -755,11 +728,11 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
/* make sure all activity has settled down first */
if (atomic_read(&ch->kthreads_assigned) > 0 ||
atomic_read(&ch->references) > 0) {
atomic_read(&ch->references) > 0) {
return;
}
DBUG_ON((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
if (part->act_state == XPC_P_DEACTIVATING) {
/* can't proceed until the other side disengages from us */
......@@ -809,7 +782,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
if (channel_was_connected) {
dev_info(xpc_chan, "channel %d to partition %d disconnected, "
"reason=%d\n", ch->number, ch->partid, ch->reason);
"reason=%d\n", ch->number, ch->partid, ch->reason);
}
if (ch->flags & XPC_C_WDISCONNECT) {
......@@ -820,35 +793,31 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
/* time to take action on any delayed IPI flags */
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo, ch->number,
ch->delayed_IPI_flags);
ch->delayed_IPI_flags);
spin_unlock(&part->IPI_lock);
}
ch->delayed_IPI_flags = 0;
}
}
/*
* Process a change in the channel's remote connection state.
*/
static void
xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
u8 IPI_flags)
u8 IPI_flags)
{
unsigned long irq_flags;
struct xpc_openclose_args *args =
&part->remote_openclose_args[ch_number];
&part->remote_openclose_args[ch_number];
struct xpc_channel *ch = &part->channels[ch_number];
enum xpc_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.
......@@ -858,7 +827,6 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
return;
}
if (IPI_flags & XPC_IPI_CLOSEREQUEST) {
dev_dbg(xpc_chan, "XPC_IPI_CLOSEREQUEST (reason=%d) received "
......@@ -890,13 +858,14 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
if (ch->flags & XPC_C_DISCONNECTED) {
if (!(IPI_flags & XPC_IPI_OPENREQUEST)) {
if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo,
ch_number) & XPC_IPI_OPENREQUEST)) {
ch_number) &
XPC_IPI_OPENREQUEST)) {
DBUG_ON(ch->delayed_IPI_flags != 0);
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo,
ch_number,
XPC_IPI_CLOSEREQUEST);
ch_number,
XPC_IPI_CLOSEREQUEST);
spin_unlock(&part->IPI_lock);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
......@@ -937,7 +906,6 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
xpc_process_disconnect(ch, &irq_flags);
}
if (IPI_flags & XPC_IPI_CLOSEREPLY) {
dev_dbg(xpc_chan, "XPC_IPI_CLOSEREPLY received from partid=%d,"
......@@ -953,12 +921,13 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo, ch_number)
& XPC_IPI_CLOSEREQUEST)) {
& XPC_IPI_CLOSEREQUEST)) {
DBUG_ON(ch->delayed_IPI_flags != 0);
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo,
ch_number, XPC_IPI_CLOSEREPLY);
ch_number,
XPC_IPI_CLOSEREPLY);
spin_unlock(&part->IPI_lock);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
......@@ -973,7 +942,6 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
}
}
if (IPI_flags & XPC_IPI_OPENREQUEST) {
dev_dbg(xpc_chan, "XPC_IPI_OPENREQUEST (msg_size=%d, "
......@@ -982,7 +950,7 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
ch->partid, ch->number);
if (part->act_state == XPC_P_DEACTIVATING ||
(ch->flags & XPC_C_ROPENREQUEST)) {
(ch->flags & XPC_C_ROPENREQUEST)) {
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
......@@ -993,9 +961,9 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
return;
}
DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
XPC_C_OPENREQUEST)));
XPC_C_OPENREQUEST)));
DBUG_ON(ch->flags & (XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
XPC_C_OPENREPLY | XPC_C_CONNECTED));
XPC_C_OPENREPLY | XPC_C_CONNECTED));
/*
* The meaningful OPENREQUEST connection state fields are:
......@@ -1011,11 +979,10 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
ch->flags |= (XPC_C_ROPENREQUEST | XPC_C_CONNECTING);
ch->remote_nentries = args->local_nentries;
if (ch->flags & XPC_C_OPENREQUEST) {
if (args->msg_size != ch->msg_size) {
XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
&irq_flags);
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
......@@ -1031,7 +998,6 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
xpc_process_connect(ch, &irq_flags);
}
if (IPI_flags & XPC_IPI_OPENREPLY) {
dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%lx, "
......@@ -1046,7 +1012,7 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
}
if (!(ch->flags & XPC_C_OPENREQUEST)) {
XPC_DISCONNECT_CHANNEL(ch, xpcOpenCloseError,
&irq_flags);
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
......@@ -1057,7 +1023,7 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
/*
* The meaningful OPENREPLY connection state fields are:
* local_msgqueue_pa = physical address of remote
* partition's local_msgqueue
* partition's local_msgqueue
* local_nentries = remote partition's local_nentries
* remote_nentries = remote partition's remote_nentries
*/
......@@ -1093,7 +1059,6 @@ xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
/*
* Attempt to establish a channel connection to a remote partition.
*/
......@@ -1103,7 +1068,6 @@ xpc_connect_channel(struct xpc_channel *ch)
unsigned long irq_flags;
struct xpc_registration *registration = &xpc_registrations[ch->number];
if (mutex_trylock(&registration->mutex) == 0) {
return xpcRetry;
}
......@@ -1124,7 +1088,6 @@ xpc_connect_channel(struct xpc_channel *ch)
return ch->reason;
}
/* add info from the channel connect registration to the channel */
ch->kthreads_assigned_limit = registration->assigned_limit;
......@@ -1154,7 +1117,7 @@ xpc_connect_channel(struct xpc_channel *ch)
*/
mutex_unlock(&registration->mutex);
XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
&irq_flags);
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return xpcUnequalMsgSizes;
}
......@@ -1169,7 +1132,6 @@ xpc_connect_channel(struct xpc_channel *ch)
mutex_unlock(&registration->mutex);
/* initiate the connection */
ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
......@@ -1182,7 +1144,6 @@ xpc_connect_channel(struct xpc_channel *ch)
return xpcSuccess;
}
/*
* Clear some of the msg flags in the local message queue.
*/
......@@ -1192,16 +1153,15 @@ xpc_clear_local_msgqueue_flags(struct xpc_channel *ch)
struct xpc_msg *msg;
s64 get;
get = ch->w_remote_GP.get;
do {
msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
(get % ch->local_nentries) * ch->msg_size);
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
(get % ch->local_nentries) *
ch->msg_size);
msg->flags = 0;
} while (++get < (volatile s64) ch->remote_GP.get);
} while (++get < (volatile s64)ch->remote_GP.get);
}
/*
* Clear some of the msg flags in the remote message queue.
*/
......@@ -1211,43 +1171,39 @@ xpc_clear_remote_msgqueue_flags(struct xpc_channel *ch)
struct xpc_msg *msg;
s64 put;
put = ch->w_remote_GP.put;
do {
msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
(put % ch->remote_nentries) * ch->msg_size);
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
(put % ch->remote_nentries) *
ch->msg_size);
msg->flags = 0;
} while (++put < (volatile s64) ch->remote_GP.put);
} while (++put < (volatile s64)ch->remote_GP.put);
}
static void
xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
{
struct xpc_channel *ch = &part->channels[ch_number];
int nmsgs_sent;
ch->remote_GP = part->remote_GPs[ch_number];
/* See what, if anything, has changed for each connected channel */
xpc_msgqueue_ref(ch);
if (ch->w_remote_GP.get == ch->remote_GP.get &&
ch->w_remote_GP.put == ch->remote_GP.put) {
ch->w_remote_GP.put == ch->remote_GP.put) {
/* nothing changed since GPs were last pulled */
xpc_msgqueue_deref(ch);
return;
}
if (!(ch->flags & XPC_C_CONNECTED)){
if (!(ch->flags & XPC_C_CONNECTED)) {
xpc_msgqueue_deref(ch);
return;
}
/*
* First check to see if messages recently sent by us have been
* received by the other side. (The remote GET value will have
......@@ -1269,7 +1225,7 @@ xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
* received and delivered by the other side.
*/
xpc_notify_senders(ch, xpcMsgDelivered,
ch->remote_GP.get);
ch->remote_GP.get);
}
/*
......@@ -1293,7 +1249,6 @@ xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
}
}
/*
* Now check for newly sent messages by the other side. (The remote
* PUT value will have changed since we last looked at it.)
......@@ -1327,7 +1282,6 @@ xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
xpc_msgqueue_deref(ch);
}
void
xpc_process_channel_activity(struct xpc_partition *part)
{
......@@ -1337,7 +1291,6 @@ xpc_process_channel_activity(struct xpc_partition *part)
int ch_number;
u32 ch_flags;
IPI_amo = xpc_get_IPI_flags(part);
/*
......@@ -1350,7 +1303,6 @@ xpc_process_channel_activity(struct xpc_partition *part)
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
/*
* Process any open or close related IPI flags, and then deal
* with connecting or disconnecting the channel as required.
......@@ -1378,7 +1330,7 @@ xpc_process_channel_activity(struct xpc_partition *part)
if (!(ch_flags & XPC_C_CONNECTED)) {
if (!(ch_flags & XPC_C_OPENREQUEST)) {
DBUG_ON(ch_flags & XPC_C_SETUP);
(void) xpc_connect_channel(ch);
(void)xpc_connect_channel(ch);
} else {
spin_lock_irqsave(&ch->lock, irq_flags);
xpc_process_connect(ch, &irq_flags);
......@@ -1387,7 +1339,6 @@ xpc_process_channel_activity(struct xpc_partition *part)
continue;
}
/*
* Process any message related IPI flags, this may involve the
* activation of kthreads to deliver any pending messages sent
......@@ -1400,7 +1351,6 @@ xpc_process_channel_activity(struct xpc_partition *part)
}
}
/*
* XPC's heartbeat code calls this function to inform XPC that a partition is
* going down. XPC responds by tearing down the XPartition Communication
......@@ -1417,7 +1367,6 @@ xpc_partition_going_down(struct xpc_partition *part, enum xpc_retval reason)
int ch_number;
struct xpc_channel *ch;
dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
XPC_PARTID(part), reason);
......@@ -1426,7 +1375,6 @@ xpc_partition_going_down(struct xpc_partition *part, enum xpc_retval reason)
return;
}
/* disconnect channels associated with the partition going down */
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
......@@ -1446,7 +1394,6 @@ xpc_partition_going_down(struct xpc_partition *part, enum xpc_retval reason)
xpc_part_deref(part);
}
/*
* Teardown the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
......@@ -1456,7 +1403,6 @@ xpc_teardown_infrastructure(struct xpc_partition *part)
{
partid_t partid = XPC_PARTID(part);
/*
* We start off by making this partition inaccessible to local
* processes by marking it as no longer setup. Then we make it
......@@ -1473,9 +1419,7 @@ xpc_teardown_infrastructure(struct xpc_partition *part)
xpc_vars_part[partid].magic = 0;
free_irq(SGI_XPC_NOTIFY, (void *) (u64) partid);
free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
/*
* Before proceeding with the teardown we have to wait until all
......@@ -1483,7 +1427,6 @@ xpc_teardown_infrastructure(struct xpc_partition *part)
*/
wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
/* now we can begin tearing down the infrastructure */
part->setup_state = XPC_P_TORNDOWN;
......@@ -1504,7 +1447,6 @@ xpc_teardown_infrastructure(struct xpc_partition *part)
part->local_IPI_amo_va = NULL;
}
/*
* Called by XP at the time of channel connection registration to cause
* XPC to establish connections to all currently active partitions.
......@@ -1516,7 +1458,6 @@ xpc_initiate_connect(int ch_number)
struct xpc_partition *part;
struct xpc_channel *ch;
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
......@@ -1535,7 +1476,6 @@ xpc_initiate_connect(int ch_number)
}
}
void
xpc_connected_callout(struct xpc_channel *ch)
{
......@@ -1546,14 +1486,13 @@ xpc_connected_callout(struct xpc_channel *ch)
"partid=%d, channel=%d\n", ch->partid, ch->number);
ch->func(xpcConnected, ch->partid, ch->number,
(void *) (u64) ch->local_nentries, ch->key);
(void *)(u64)ch->local_nentries, ch->key);
dev_dbg(xpc_chan, "ch->func() returned, reason=xpcConnected, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
}
}
/*
* Called by XP at the time of channel connection unregistration to cause
* XPC to teardown all current connections for the specified channel.
......@@ -1575,7 +1514,6 @@ xpc_initiate_disconnect(int ch_number)
struct xpc_partition *part;
struct xpc_channel *ch;
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
/* initiate the channel disconnect for every active partition */
......@@ -1592,7 +1530,7 @@ xpc_initiate_disconnect(int ch_number)
ch->flags |= XPC_C_WDISCONNECT;
XPC_DISCONNECT_CHANNEL(ch, xpcUnregistering,
&irq_flags);
&irq_flags);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
......@@ -1605,7 +1543,6 @@ xpc_initiate_disconnect(int ch_number)
xpc_disconnect_wait(ch_number);
}
/*
* To disconnect a channel, and reflect it back to all who may be waiting.
*
......@@ -1617,11 +1554,10 @@ xpc_initiate_disconnect(int ch_number)
*/
void
xpc_disconnect_channel(const int line, struct xpc_channel *ch,
enum xpc_retval reason, unsigned long *irq_flags)
enum xpc_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)) {
......@@ -1637,8 +1573,8 @@ xpc_disconnect_channel(const int line, struct xpc_channel *ch,
ch->flags |= (XPC_C_CLOSEREQUEST | XPC_C_DISCONNECTING);
/* some of these may not have been set */
ch->flags &= ~(XPC_C_OPENREQUEST | XPC_C_OPENREPLY |
XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
XPC_C_CONNECTING | XPC_C_CONNECTED);
XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
XPC_C_CONNECTING | XPC_C_CONNECTED);
xpc_IPI_send_closerequest(ch, irq_flags);
......@@ -1653,7 +1589,7 @@ xpc_disconnect_channel(const int line, struct xpc_channel *ch,
wake_up_all(&ch->idle_wq);
} else if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
/* start a kthread that will do the xpcDisconnecting callout */
xpc_create_kthreads(ch, 1, 1);
}
......@@ -1666,7 +1602,6 @@ xpc_disconnect_channel(const int line, struct xpc_channel *ch,
spin_lock_irqsave(&ch->lock, *irq_flags);
}
void
xpc_disconnect_callout(struct xpc_channel *ch, enum xpc_retval reason)
{
......@@ -1687,7 +1622,6 @@ xpc_disconnect_callout(struct xpc_channel *ch, enum xpc_retval reason)
}
}
/*
* Wait for a message entry to become available for the specified channel,
* but don't wait any longer than 1 jiffy.
......@@ -1697,9 +1631,8 @@ xpc_allocate_msg_wait(struct xpc_channel *ch)
{
enum xpc_retval ret;
if (ch->flags & XPC_C_DISCONNECTING) {
DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
return ch->reason;
}
......@@ -1709,7 +1642,7 @@ xpc_allocate_msg_wait(struct xpc_channel *ch)
if (ch->flags & XPC_C_DISCONNECTING) {
ret = ch->reason;
DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
} else if (ret == 0) {
ret = xpcTimeout;
} else {
......@@ -1719,20 +1652,18 @@ xpc_allocate_msg_wait(struct xpc_channel *ch)
return ret;
}
/*
* Allocate an entry for a message from the message queue associated with the
* specified channel.
*/
static enum xpc_retval
xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
struct xpc_msg **address_of_msg)
struct xpc_msg **address_of_msg)
{
struct xpc_msg *msg;
enum xpc_retval ret;
s64 put;
/* this reference will be dropped in xpc_send_msg() */
xpc_msgqueue_ref(ch);
......@@ -1745,7 +1676,6 @@ xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
return xpcNotConnected;
}
/*
* Get the next available message entry from the local message queue.
* If none are available, we'll make sure that we grab the latest
......@@ -1755,25 +1685,23 @@ xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
while (1) {
put = (volatile s64) ch->w_local_GP.put;
if (put - (volatile s64) ch->w_remote_GP.get <
ch->local_nentries) {
put = (volatile s64)ch->w_local_GP.put;
if (put - (volatile s64)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
* to increment w_local_GP.put as long as someone else
* doesn't beat us to it. If they do, we'll have to
* try again.
*/
if (cmpxchg(&ch->w_local_GP.put, put, put + 1) ==
put) {
*/
if (cmpxchg(&ch->w_local_GP.put, put, put + 1) == put) {
/* we got the entry referenced by put */
break;
}
continue; /* try again */
}
/*
* There aren't any available msg entries at this time.
*
......@@ -1799,25 +1727,22 @@ xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
}
}
/* get the message's address and initialize it */
msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
(put % ch->local_nentries) * ch->msg_size);
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
(put % ch->local_nentries) * ch->msg_size);
DBUG_ON(msg->flags != 0);
msg->number = put;
dev_dbg(xpc_chan, "w_local_GP.put changed to %ld; msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n", put + 1,
(void *) msg, msg->number, ch->partid, ch->number);
(void *)msg, msg->number, ch->partid, ch->number);
*address_of_msg = msg;
return xpcSuccess;
}
/*
* Allocate an entry for a message from the message queue associated with the
* specified channel. NOTE that this routine can sleep waiting for a message
......@@ -1838,7 +1763,6 @@ xpc_initiate_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
enum xpc_retval ret = xpcUnknownReason;
struct xpc_msg *msg = NULL;
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
......@@ -1856,7 +1780,6 @@ xpc_initiate_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
return ret;
}
/*
* Now we actually send the messages that are ready to be sent by advancing
* the local message queue's Put value and then send an IPI to the recipient
......@@ -1869,16 +1792,16 @@ xpc_send_msgs(struct xpc_channel *ch, s64 initial_put)
s64 put = initial_put + 1;
int send_IPI = 0;
while (1) {
while (1) {
if (put == (volatile s64) ch->w_local_GP.put) {
if (put == (volatile s64)ch->w_local_GP.put) {
break;
}
msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
(put % ch->local_nentries) * ch->msg_size);
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
(put % ch->local_nentries) *
ch->msg_size);
if (!(msg->flags & XPC_M_READY)) {
break;
......@@ -1893,9 +1816,9 @@ xpc_send_msgs(struct xpc_channel *ch, s64 initial_put)
}
if (cmpxchg_rel(&ch->local_GP->put, initial_put, put) !=
initial_put) {
initial_put) {
/* someone else beat us to it */
DBUG_ON((volatile s64) ch->local_GP->put < initial_put);
DBUG_ON((volatile s64)ch->local_GP->put < initial_put);
break;
}
......@@ -1919,7 +1842,6 @@ xpc_send_msgs(struct xpc_channel *ch, s64 initial_put)
}
}
/*
* Common code that does the actual sending of the message by advancing the
* local message queue's Put value and sends an IPI to the partition the
......@@ -1927,16 +1849,15 @@ xpc_send_msgs(struct xpc_channel *ch, s64 initial_put)
*/
static enum xpc_retval
xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
xpc_notify_func func, void *key)
xpc_notify_func func, void *key)
{
enum xpc_retval ret = xpcSuccess;
struct xpc_notify *notify = notify;
s64 put, msg_number = msg->number;
DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
DBUG_ON((((u64) msg - (u64) ch->local_msgqueue) / ch->msg_size) !=
msg_number % ch->local_nentries);
DBUG_ON((((u64)msg - (u64)ch->local_msgqueue) / ch->msg_size) !=
msg_number % ch->local_nentries);
DBUG_ON(msg->flags & XPC_M_READY);
if (ch->flags & XPC_C_DISCONNECTING) {
......@@ -1970,7 +1891,7 @@ xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
* the notify entry.
*/
if (cmpxchg(&notify->type, notify_type, 0) ==
notify_type) {
notify_type) {
atomic_dec(&ch->n_to_notify);
ret = ch->reason;
}
......@@ -2001,7 +1922,6 @@ xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
return ret;
}
/*
* Send a message previously allocated using xpc_initiate_allocate() on the
* specified channel connected to the specified partition.
......@@ -2029,8 +1949,7 @@ xpc_initiate_send(partid_t partid, int ch_number, void *payload)
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
enum xpc_retval ret;
dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
partid, ch_number);
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
......@@ -2042,7 +1961,6 @@ xpc_initiate_send(partid_t partid, int ch_number, void *payload)
return ret;
}
/*
* Send a message previously allocated using xpc_initiate_allocate on the
* specified channel connected to the specified partition.
......@@ -2075,14 +1993,13 @@ xpc_initiate_send(partid_t partid, int ch_number, void *payload)
*/
enum xpc_retval
xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
xpc_notify_func func, void *key)
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;
dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
partid, ch_number);
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
......@@ -2091,11 +2008,10 @@ xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
DBUG_ON(func == NULL);
ret = xpc_send_msg(&part->channels[ch_number], msg, XPC_N_CALL,
func, key);
func, key);
return ret;
}
static struct xpc_msg *
xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
{
......@@ -2105,7 +2021,6 @@ xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
u64 msg_offset;
enum xpc_retval ret;
if (mutex_lock_interruptible(&ch->msg_to_pull_mutex) != 0) {
/* we were interrupted by a signal */
return NULL;
......@@ -2118,22 +2033,22 @@ xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
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;
(volatile s64)ch->w_remote_GP.put);
nmsgs = (volatile s64)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;
}
msg_offset = msg_index * ch->msg_size;
msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
msg_offset);
remote_msg = (struct xpc_msg *) (ch->remote_msgqueue_pa +
msg_offset);
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
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) {
nmsgs * ch->msg_size)) !=
xpcSuccess) {
dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
" msg %ld from partition %d, channel=%d, "
......@@ -2146,7 +2061,7 @@ xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
return NULL;
}
mb(); /* >>> this may not be needed, we're not sure */
mb(); /* >>> this may not be needed, we're not sure */
ch->next_msg_to_pull += nmsgs;
}
......@@ -2155,12 +2070,11 @@ xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
/* return the message we were looking for */
msg_offset = (get % ch->remote_nentries) * ch->msg_size;
msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue + msg_offset);
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
return msg;
}
/*
* Get a message to be delivered.
*/
......@@ -2170,14 +2084,13 @@ xpc_get_deliverable_msg(struct xpc_channel *ch)
struct xpc_msg *msg = NULL;
s64 get;
do {
if ((volatile u32) ch->flags & XPC_C_DISCONNECTING) {
if ((volatile u32)ch->flags & XPC_C_DISCONNECTING) {
break;
}
get = (volatile s64) ch->w_local_GP.get;
if (get == (volatile s64) ch->w_remote_GP.put) {
get = (volatile s64)ch->w_local_GP.get;
if (get == (volatile s64)ch->w_remote_GP.put) {
break;
}
......@@ -2186,7 +2099,7 @@ xpc_get_deliverable_msg(struct xpc_channel *ch)
* by trying to increment w_local_GP.get and hope that no one
* else beats us to it. If they do, we'll we'll simply have
* to try again for the next one.
*/
*/
if (cmpxchg(&ch->w_local_GP.get, get, get + 1) == get) {
/* we got the entry referenced by get */
......@@ -2211,7 +2124,6 @@ xpc_get_deliverable_msg(struct xpc_channel *ch)
return msg;
}
/*
* Deliver a message to its intended recipient.
*/
......@@ -2220,7 +2132,6 @@ xpc_deliver_msg(struct xpc_channel *ch)
{
struct xpc_msg *msg;
if ((msg = xpc_get_deliverable_msg(ch)) != NULL) {
/*
......@@ -2235,16 +2146,16 @@ xpc_deliver_msg(struct xpc_channel *ch)
if (ch->func != NULL) {
dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
(void *) msg, msg->number, ch->partid,
(void *)msg, msg->number, ch->partid,
ch->number);
/* deliver the message to its intended recipient */
ch->func(xpcMsgReceived, ch->partid, ch->number,
&msg->payload, ch->key);
&msg->payload, ch->key);
dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
(void *) msg, msg->number, ch->partid,
(void *)msg, msg->number, ch->partid,
ch->number);
}
......@@ -2252,7 +2163,6 @@ xpc_deliver_msg(struct xpc_channel *ch)
}
}
/*
* 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
......@@ -2265,16 +2175,16 @@ xpc_acknowledge_msgs(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
s64 get = initial_get + 1;
int send_IPI = 0;
while (1) {
while (1) {
if (get == (volatile s64) ch->w_local_GP.get) {
if (get == (volatile s64)ch->w_local_GP.get) {
break;
}
msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
(get % ch->remote_nentries) * ch->msg_size);
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
(get % ch->remote_nentries) *
ch->msg_size);
if (!(msg->flags & XPC_M_DONE)) {
break;
......@@ -2290,10 +2200,9 @@ xpc_acknowledge_msgs(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
}
if (cmpxchg_rel(&ch->local_GP->get, initial_get, get) !=
initial_get) {
initial_get) {
/* someone else beat us to it */
DBUG_ON((volatile s64) ch->local_GP->get <=
initial_get);
DBUG_ON((volatile s64)ch->local_GP->get <= initial_get);
break;
}
......@@ -2317,7 +2226,6 @@ xpc_acknowledge_msgs(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
}
}
/*
* Acknowledge receipt of a delivered message.
*
......@@ -2343,17 +2251,16 @@ xpc_initiate_received(partid_t partid, int ch_number, void *payload)
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
s64 get, msg_number = msg->number;
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
ch = &part->channels[ch_number];
dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
(void *) msg, msg_number, ch->partid, ch->number);
(void *)msg, msg_number, ch->partid, ch->number);
DBUG_ON((((u64) msg - (u64) ch->remote_msgqueue) / ch->msg_size) !=
msg_number % ch->remote_nentries);
DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->msg_size) !=
msg_number % ch->remote_nentries);
DBUG_ON(msg->flags & XPC_M_DONE);
msg->flags |= XPC_M_DONE;
......@@ -2376,4 +2283,3 @@ xpc_initiate_received(partid_t partid, int ch_number, void *payload)
/* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg() */
xpc_msgqueue_deref(ch);
}
drivers/misc/sgi-xp/xpc_main.c
View file @ 35190506
......@@ -6,7 +6,6 @@
* Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
/*
* Cross Partition Communication (XPC) support - standard version.
*
......@@ -44,7 +43,6 @@
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
......@@ -61,7 +59,6 @@
#include <asm/uaccess.h>
#include "xpc.h"
/* define two XPC debug device structures to be used with dev_dbg() et al */
struct device_driver xpc_dbg_name = {
......@@ -81,10 +78,8 @@ struct device xpc_chan_dbg_subname = {
struct device *xpc_part = &xpc_part_dbg_subname;
struct device *xpc_chan = &xpc_chan_dbg_subname;
static int xpc_kdebug_ignore;
/* systune related variables for /proc/sys directories */
static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
......@@ -101,56 +96,51 @@ static int xpc_disengage_request_max_timelimit = 120;
static ctl_table xpc_sys_xpc_hb_dir[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "hb_interval",
.data = &xpc_hb_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
.extra1 = &xpc_hb_min_interval,
.extra2 = &xpc_hb_max_interval
},
.ctl_name = CTL_UNNUMBERED,
.procname = "hb_interval",
.data = &xpc_hb_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
.extra1 = &xpc_hb_min_interval,
.extra2 = &xpc_hb_max_interval},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "hb_check_interval",
.data = &xpc_hb_check_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
.extra1 = &xpc_hb_check_min_interval,
.extra2 = &xpc_hb_check_max_interval
},
.ctl_name = CTL_UNNUMBERED,
.procname = "hb_check_interval",
.data = &xpc_hb_check_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
.extra1 = &xpc_hb_check_min_interval,
.extra2 = &xpc_hb_check_max_interval},
{}
};
static ctl_table xpc_sys_xpc_dir[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "hb",
.mode = 0555,
.child = xpc_sys_xpc_hb_dir
},
.ctl_name = CTL_UNNUMBERED,
.procname = "hb",
.mode = 0555,
.child = xpc_sys_xpc_hb_dir},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "disengage_request_timelimit",
.data = &xpc_disengage_request_timelimit,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
.extra1 = &xpc_disengage_request_min_timelimit,
.extra2 = &xpc_disengage_request_max_timelimit
},
.ctl_name = CTL_UNNUMBERED,
.procname = "disengage_request_timelimit",
.data = &xpc_disengage_request_timelimit,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
.extra1 = &xpc_disengage_request_min_timelimit,
.extra2 = &xpc_disengage_request_max_timelimit},
{}
};
static ctl_table xpc_sys_dir[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "xpc",
.mode = 0555,
.child = xpc_sys_xpc_dir
},
.ctl_name = CTL_UNNUMBERED,
.procname = "xpc",
.mode = 0555,
.child = xpc_sys_xpc_dir},
{}
};
static struct ctl_table_header *xpc_sysctl;
......@@ -172,13 +162,10 @@ static DECLARE_COMPLETION(xpc_hb_checker_exited);
/* notification that the xpc_discovery thread has exited */
static DECLARE_COMPLETION(xpc_discovery_exited);
static struct timer_list xpc_hb_timer;
static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
static int xpc_system_reboot(struct notifier_block *, unsigned long, void *);
static struct notifier_block xpc_reboot_notifier = {
.notifier_call = xpc_system_reboot,
......@@ -189,25 +176,22 @@ static struct notifier_block xpc_die_notifier = {
.notifier_call = xpc_system_die,
};
/*
* Timer function to enforce the timelimit on the partition disengage request.
*/
static void
xpc_timeout_partition_disengage_request(unsigned long data)
{
struct xpc_partition *part = (struct xpc_partition *) data;
struct xpc_partition *part = (struct xpc_partition *)data;
DBUG_ON(time_before(jiffies, part->disengage_request_timeout));
(void) xpc_partition_disengaged(part);
(void)xpc_partition_disengaged(part);
DBUG_ON(part->disengage_request_timeout != 0);
DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
}
/*
* Notify the heartbeat check thread that an IRQ has been received.
*/
......@@ -219,7 +203,6 @@ xpc_act_IRQ_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
/*
* Timer to produce the heartbeat. The timer structures function is
* already set when this is initially called. A tunable is used to
......@@ -238,7 +221,6 @@ xpc_hb_beater(unsigned long dummy)
add_timer(&xpc_hb_timer);
}
/*
* This thread is responsible for nearly all of the partition
* activation/deactivation.
......@@ -248,8 +230,7 @@ xpc_hb_checker(void *ignore)
{
int last_IRQ_count = 0;
int new_IRQ_count;
int force_IRQ=0;
int force_IRQ = 0;
/* this thread was marked active by xpc_hb_init() */
......@@ -261,14 +242,13 @@ xpc_hb_checker(void *ignore)
xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
xpc_hb_beater(0);
while (!(volatile int) xpc_exiting) {
while (!(volatile int)xpc_exiting) {
dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
"been received\n",
(int) (xpc_hb_check_timeout - jiffies),
(int)(xpc_hb_check_timeout - jiffies),
atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
/* checking of remote heartbeats is skewed by IRQ handling */
if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
dev_dbg(xpc_part, "checking remote heartbeats\n");
......@@ -282,7 +262,6 @@ xpc_hb_checker(void *ignore)
force_IRQ = 1;
}
/* check for outstanding IRQs */
new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
......@@ -294,30 +273,30 @@ xpc_hb_checker(void *ignore)
last_IRQ_count += xpc_identify_act_IRQ_sender();
if (last_IRQ_count < new_IRQ_count) {
/* retry once to help avoid missing AMO */
(void) xpc_identify_act_IRQ_sender();
(void)xpc_identify_act_IRQ_sender();
}
last_IRQ_count = new_IRQ_count;
xpc_hb_check_timeout = jiffies +
(xpc_hb_check_interval * HZ);
(xpc_hb_check_interval * HZ);
}
/* wait for IRQ or timeout */
(void) wait_event_interruptible(xpc_act_IRQ_wq,
(last_IRQ_count < atomic_read(&xpc_act_IRQ_rcvd) ||
time_after_eq(jiffies, xpc_hb_check_timeout) ||
(volatile int) xpc_exiting));
(void)wait_event_interruptible(xpc_act_IRQ_wq,
(last_IRQ_count <
atomic_read(&xpc_act_IRQ_rcvd)
|| time_after_eq(jiffies,
xpc_hb_check_timeout) ||
(volatile int)xpc_exiting));
}
dev_dbg(xpc_part, "heartbeat checker is exiting\n");
/* mark this thread as having exited */
complete(&xpc_hb_checker_exited);
return 0;
}
/*
* This thread will attempt to discover other partitions to activate
* based on info provided by SAL. This new thread is short lived and
......@@ -337,7 +316,6 @@ xpc_initiate_discovery(void *ignore)
return 0;
}
/*
* Establish first contact with the remote partititon. This involves pulling
* the XPC per partition variables from the remote partition and waiting for
......@@ -348,7 +326,6 @@ xpc_make_first_contact(struct xpc_partition *part)
{
enum xpc_retval ret;
while ((ret = xpc_pull_remote_vars_part(part)) != xpcSuccess) {
if (ret != xpcRetry) {
XPC_DEACTIVATE_PARTITION(part, ret);
......@@ -359,7 +336,7 @@ xpc_make_first_contact(struct xpc_partition *part)
"partition %d\n", XPC_PARTID(part));
/* wait a 1/4 of a second or so */
(void) msleep_interruptible(250);
(void)msleep_interruptible(250);
if (part->act_state == XPC_P_DEACTIVATING) {
return part->reason;
......@@ -369,7 +346,6 @@ xpc_make_first_contact(struct xpc_partition *part)
return xpc_mark_partition_active(part);
}
/*
* The first kthread assigned to a newly activated partition is the one
* created by XPC HB with which it calls xpc_partition_up(). XPC hangs on to
......@@ -386,12 +362,11 @@ static void
xpc_channel_mgr(struct xpc_partition *part)
{
while (part->act_state != XPC_P_DEACTIVATING ||
atomic_read(&part->nchannels_active) > 0 ||
!xpc_partition_disengaged(part)) {
atomic_read(&part->nchannels_active) > 0 ||
!xpc_partition_disengaged(part)) {
xpc_process_channel_activity(part);
/*
* Wait until we've been requested to activate kthreads or
* all of the channel's message queues have been torn down or
......@@ -406,13 +381,19 @@ xpc_channel_mgr(struct xpc_partition *part)
* wake him up.
*/
atomic_dec(&part->channel_mgr_requests);
(void) wait_event_interruptible(part->channel_mgr_wq,
(atomic_read(&part->channel_mgr_requests) > 0 ||
(volatile u64) part->local_IPI_amo != 0 ||
((volatile u8) part->act_state ==
XPC_P_DEACTIVATING &&
atomic_read(&part->nchannels_active) == 0 &&
xpc_partition_disengaged(part))));
(void)wait_event_interruptible(part->channel_mgr_wq,
(atomic_read
(&part->channel_mgr_requests) >
0 ||
(volatile u64)part->
local_IPI_amo != 0 ||
((volatile u8)part->act_state ==
XPC_P_DEACTIVATING &&
atomic_read(&part->
nchannels_active)
== 0 &&
xpc_partition_disengaged
(part))));
atomic_set(&part->channel_mgr_requests, 1);
// >>> Does it need to wakeup periodically as well? In case we
......@@ -420,7 +401,6 @@ xpc_channel_mgr(struct xpc_partition *part)
}
}
/*
* When XPC HB determines that a partition has come up, it will create a new
* kthread and that kthread will call this function to attempt to set up the
......@@ -454,7 +434,7 @@ xpc_partition_up(struct xpc_partition *part)
* has been dismantled.
*/
(void) xpc_part_ref(part); /* this will always succeed */
(void)xpc_part_ref(part); /* this will always succeed */
if (xpc_make_first_contact(part) == xpcSuccess) {
xpc_channel_mgr(part);
......@@ -465,17 +445,15 @@ xpc_partition_up(struct xpc_partition *part)
xpc_teardown_infrastructure(part);
}
static int
xpc_activating(void *__partid)
{
partid_t partid = (u64) __partid;
partid_t partid = (u64)__partid;
struct xpc_partition *part = &xpc_partitions[partid];
unsigned long irq_flags;
struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
struct sched_param param = {.sched_priority = MAX_RT_PRIO - 1 };
int ret;
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
spin_lock_irqsave(&part->act_lock, irq_flags);
......@@ -505,7 +483,7 @@ xpc_activating(void *__partid)
ret = sched_setscheduler(current, SCHED_FIFO, &param);
if (ret != 0) {
dev_warn(xpc_part, "unable to set pid %d to a realtime "
"priority, ret=%d\n", current->pid, ret);
"priority, ret=%d\n", current->pid, ret);
}
/* allow this thread and its children to run on any CPU */
......@@ -522,9 +500,9 @@ xpc_activating(void *__partid)
* reloads and system reboots.
*/
if (sn_register_xp_addr_region(part->remote_amos_page_pa,
PAGE_SIZE, 1) < 0) {
PAGE_SIZE, 1) < 0) {
dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
"xp_addr region\n", partid);
"xp_addr region\n", partid);
spin_lock_irqsave(&part->act_lock, irq_flags);
part->act_state = XPC_P_INACTIVE;
......@@ -537,12 +515,11 @@ xpc_activating(void *__partid)
xpc_allow_hb(partid, xpc_vars);
xpc_IPI_send_activated(part);
/*
* xpc_partition_up() holds this thread and marks this partition as
* XPC_P_ACTIVE by calling xpc_hb_mark_active().
*/
(void) xpc_partition_up(part);
(void)xpc_partition_up(part);
xpc_disallow_hb(partid, xpc_vars);
xpc_mark_partition_inactive(part);
......@@ -555,7 +532,6 @@ xpc_activating(void *__partid)
return 0;
}
void
xpc_activate_partition(struct xpc_partition *part)
{
......@@ -563,7 +539,6 @@ xpc_activate_partition(struct xpc_partition *part)
unsigned long irq_flags;
pid_t pid;
spin_lock_irqsave(&part->act_lock, irq_flags);
DBUG_ON(part->act_state != XPC_P_INACTIVE);
......@@ -573,7 +548,7 @@ xpc_activate_partition(struct xpc_partition *part)
spin_unlock_irqrestore(&part->act_lock, irq_flags);
pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
pid = kernel_thread(xpc_activating, (void *)((u64)partid), 0);
if (unlikely(pid <= 0)) {
spin_lock_irqsave(&part->act_lock, irq_flags);
......@@ -583,7 +558,6 @@ xpc_activate_partition(struct xpc_partition *part)
}
}
/*
* Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
* partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
......@@ -603,10 +577,9 @@ xpc_activate_partition(struct xpc_partition *part)
irqreturn_t
xpc_notify_IRQ_handler(int irq, void *dev_id)
{
partid_t partid = (partid_t) (u64) dev_id;
partid_t partid = (partid_t) (u64)dev_id;
struct xpc_partition *part = &xpc_partitions[partid];
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
if (xpc_part_ref(part)) {
......@@ -617,7 +590,6 @@ xpc_notify_IRQ_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
/*
* Check to see if xpc_notify_IRQ_handler() dropped any IPIs on the floor
* because the write to their associated IPI amo completed after the IRQ/IPI
......@@ -630,13 +602,12 @@ xpc_dropped_IPI_check(struct xpc_partition *part)
xpc_check_for_channel_activity(part);
part->dropped_IPI_timer.expires = jiffies +
XPC_P_DROPPED_IPI_WAIT;
XPC_P_DROPPED_IPI_WAIT;
add_timer(&part->dropped_IPI_timer);
xpc_part_deref(part);
}
}
void
xpc_activate_kthreads(struct xpc_channel *ch, int needed)
{
......@@ -644,7 +615,6 @@ xpc_activate_kthreads(struct xpc_channel *ch, int needed)
int assigned = atomic_read(&ch->kthreads_assigned);
int wakeup;
DBUG_ON(needed <= 0);
if (idle > 0) {
......@@ -676,7 +646,6 @@ xpc_activate_kthreads(struct xpc_channel *ch, int needed)
xpc_create_kthreads(ch, needed, 0);
}
/*
* This function is where XPC's kthreads wait for messages to deliver.
*/
......@@ -686,15 +655,14 @@ xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
do {
/* deliver messages to their intended recipients */
while ((volatile s64) ch->w_local_GP.get <
(volatile s64) ch->w_remote_GP.put &&
!((volatile u32) ch->flags &
XPC_C_DISCONNECTING)) {
while ((volatile s64)ch->w_local_GP.get <
(volatile s64)ch->w_remote_GP.put &&
!((volatile u32)ch->flags & XPC_C_DISCONNECTING)) {
xpc_deliver_msg(ch);
}
if (atomic_inc_return(&ch->kthreads_idle) >
ch->kthreads_idle_limit) {
ch->kthreads_idle_limit) {
/* too many idle kthreads on this channel */
atomic_dec(&ch->kthreads_idle);
break;
......@@ -703,18 +671,20 @@ xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
dev_dbg(xpc_chan, "idle kthread calling "
"wait_event_interruptible_exclusive()\n");
(void) wait_event_interruptible_exclusive(ch->idle_wq,
((volatile s64) ch->w_local_GP.get <
(volatile s64) ch->w_remote_GP.put ||
((volatile u32) ch->flags &
XPC_C_DISCONNECTING)));
(void)wait_event_interruptible_exclusive(ch->idle_wq,
((volatile s64)ch->
w_local_GP.get <
(volatile s64)ch->
w_remote_GP.put ||
((volatile u32)ch->
flags &
XPC_C_DISCONNECTING)));
atomic_dec(&ch->kthreads_idle);
} while (!((volatile u32) ch->flags & XPC_C_DISCONNECTING));
} while (!((volatile u32)ch->flags & XPC_C_DISCONNECTING));
}
static int
xpc_daemonize_kthread(void *args)
{
......@@ -725,7 +695,6 @@ xpc_daemonize_kthread(void *args)
int n_needed;
unsigned long irq_flags;
daemonize("xpc%02dc%d", partid, ch_number);
dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
......@@ -756,8 +725,7 @@ xpc_daemonize_kthread(void *args)
* need one less than total #of messages to deliver.
*/
n_needed = ch->w_remote_GP.put - ch->w_local_GP.get - 1;
if (n_needed > 0 &&
!(ch->flags & XPC_C_DISCONNECTING)) {
if (n_needed > 0 && !(ch->flags & XPC_C_DISCONNECTING)) {
xpc_activate_kthreads(ch, n_needed);
}
} else {
......@@ -771,7 +739,7 @@ xpc_daemonize_kthread(void *args)
spin_lock_irqsave(&ch->lock, irq_flags);
if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
ch->flags |= XPC_C_DISCONNECTINGCALLOUT;
spin_unlock_irqrestore(&ch->lock, irq_flags);
......@@ -798,7 +766,6 @@ xpc_daemonize_kthread(void *args)
return 0;
}
/*
* For each partition that XPC has established communications with, there is
* a minimum of one kernel thread assigned to perform any operation that
......@@ -813,14 +780,13 @@ xpc_daemonize_kthread(void *args)
*/
void
xpc_create_kthreads(struct xpc_channel *ch, int needed,
int ignore_disconnecting)
int ignore_disconnecting)
{
unsigned long irq_flags;
pid_t pid;
u64 args = XPC_PACK_ARGS(ch->partid, ch->number);
struct xpc_partition *part = &xpc_partitions[ch->partid];
while (needed-- > 0) {
/*
......@@ -832,7 +798,7 @@ xpc_create_kthreads(struct xpc_channel *ch, int needed,
if (!atomic_inc_not_zero(&ch->kthreads_assigned)) {
/* kthreads assigned had gone to zero */
BUG_ON(!(ch->flags &
XPC_C_DISCONNECTINGCALLOUT_MADE));
XPC_C_DISCONNECTINGCALLOUT_MADE));
break;
}
......@@ -843,10 +809,10 @@ xpc_create_kthreads(struct xpc_channel *ch, int needed,
if (atomic_inc_return(&part->nchannels_engaged) == 1)
xpc_mark_partition_engaged(part);
}
(void) xpc_part_ref(part);
(void)xpc_part_ref(part);
xpc_msgqueue_ref(ch);
pid = kernel_thread(xpc_daemonize_kthread, (void *) args, 0);
pid = kernel_thread(xpc_daemonize_kthread, (void *)args, 0);
if (pid < 0) {
/* the fork failed */
......@@ -869,7 +835,7 @@ xpc_create_kthreads(struct xpc_channel *ch, int needed,
xpc_part_deref(part);
if (atomic_read(&ch->kthreads_assigned) <
ch->kthreads_idle_limit) {
ch->kthreads_idle_limit) {
/*
* Flag this as an error only if we have an
* insufficient #of kthreads for the channel
......@@ -877,7 +843,7 @@ xpc_create_kthreads(struct xpc_channel *ch, int needed,
*/
spin_lock_irqsave(&ch->lock, irq_flags);
XPC_DISCONNECT_CHANNEL(ch, xpcLackOfResources,
&irq_flags);
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
break;
......@@ -887,7 +853,6 @@ xpc_create_kthreads(struct xpc_channel *ch, int needed,
}
}
void
xpc_disconnect_wait(int ch_number)
{
......@@ -897,7 +862,6 @@ xpc_disconnect_wait(int ch_number)
struct xpc_channel *ch;
int wakeup_channel_mgr;
/* now wait for all callouts to the caller's function to cease */
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
......@@ -923,7 +887,8 @@ xpc_disconnect_wait(int ch_number)
if (part->act_state != XPC_P_DEACTIVATING) {
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo,
ch->number, ch->delayed_IPI_flags);
ch->number,
ch->delayed_IPI_flags);
spin_unlock(&part->IPI_lock);
wakeup_channel_mgr = 1;
}
......@@ -941,7 +906,6 @@ xpc_disconnect_wait(int ch_number)
}
}
static void
xpc_do_exit(enum xpc_retval reason)
{
......@@ -950,7 +914,6 @@ xpc_do_exit(enum xpc_retval reason)
struct xpc_partition *part;
unsigned long printmsg_time, disengage_request_timeout = 0;
/* a 'rmmod XPC' and a 'reboot' cannot both end up here together */
DBUG_ON(xpc_exiting == 1);
......@@ -971,10 +934,8 @@ xpc_do_exit(enum xpc_retval reason)
/* wait for the heartbeat checker thread to exit */
wait_for_completion(&xpc_hb_checker_exited);
/* sleep for a 1/3 of a second or so */
(void) msleep_interruptible(300);
(void)msleep_interruptible(300);
/* wait for all partitions to become inactive */
......@@ -988,7 +949,7 @@ xpc_do_exit(enum xpc_retval reason)
part = &xpc_partitions[partid];
if (xpc_partition_disengaged(part) &&
part->act_state == XPC_P_INACTIVE) {
part->act_state == XPC_P_INACTIVE) {
continue;
}
......@@ -997,47 +958,46 @@ xpc_do_exit(enum xpc_retval reason)
XPC_DEACTIVATE_PARTITION(part, reason);
if (part->disengage_request_timeout >
disengage_request_timeout) {
disengage_request_timeout) {
disengage_request_timeout =
part->disengage_request_timeout;
part->disengage_request_timeout;
}
}
if (xpc_partition_engaged(-1UL)) {
if (time_after(jiffies, printmsg_time)) {
dev_info(xpc_part, "waiting for remote "
"partitions to disengage, timeout in "
"%ld seconds\n",
(disengage_request_timeout - jiffies)
/ HZ);
"partitions to disengage, timeout in "
"%ld seconds\n",
(disengage_request_timeout - jiffies)
/ HZ);
printmsg_time = jiffies +
(XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
(XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
printed_waiting_msg = 1;
}
} else if (active_part_count > 0) {
if (printed_waiting_msg) {
dev_info(xpc_part, "waiting for local partition"
" to disengage\n");
" to disengage\n");
printed_waiting_msg = 0;
}
} else {
if (!xpc_disengage_request_timedout) {
dev_info(xpc_part, "all partitions have "
"disengaged\n");
"disengaged\n");
}
break;
}
/* sleep for a 1/3 of a second or so */
(void) msleep_interruptible(300);
(void)msleep_interruptible(300);
} while (1);
DBUG_ON(xpc_partition_engaged(-1UL));
/* indicate to others that our reserved page is uninitialized */
xpc_rsvd_page->vars_pa = 0;
......@@ -1047,16 +1007,15 @@ xpc_do_exit(enum xpc_retval reason)
if (reason == xpcUnloading) {
/* take ourselves off of the reboot_notifier_list */
(void) unregister_reboot_notifier(&xpc_reboot_notifier);
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
/* take ourselves off of the die_notifier list */
(void) unregister_die_notifier(&xpc_die_notifier);
(void)unregister_die_notifier(&xpc_die_notifier);
}
/* close down protections for IPI operations */
xpc_restrict_IPI_ops();
/* clear the interface to XPC's functions */
xpc_clear_interface();
......@@ -1067,7 +1026,6 @@ xpc_do_exit(enum xpc_retval reason)
kfree(xpc_remote_copy_buffer_base);
}
/*
* This function is called when the system is being rebooted.
*/
......@@ -1076,7 +1034,6 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
{
enum xpc_retval reason;
switch (event) {
case SYS_RESTART:
reason = xpcSystemReboot;
......@@ -1095,7 +1052,6 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
return NOTIFY_DONE;
}
/*
* Notify other partitions to disengage from all references to our memory.
*/
......@@ -1107,17 +1063,15 @@ xpc_die_disengage(void)
unsigned long engaged;
long time, printmsg_time, disengage_request_timeout;
/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;
xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
remote_vars_version)) {
if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
/* just in case it was left set by an earlier XPC */
xpc_clear_partition_engaged(1UL << partid);
......@@ -1125,7 +1079,7 @@ xpc_die_disengage(void)
}
if (xpc_partition_engaged(1UL << partid) ||
part->act_state != XPC_P_INACTIVE) {
part->act_state != XPC_P_INACTIVE) {
xpc_request_partition_disengage(part);
xpc_mark_partition_disengaged(part);
xpc_IPI_send_disengage(part);
......@@ -1134,9 +1088,9 @@ xpc_die_disengage(void)
time = rtc_time();
printmsg_time = time +
(XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
(XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
disengage_request_timeout = time +
(xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
(xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
/* wait for all other partitions to disengage from us */
......@@ -1152,8 +1106,8 @@ xpc_die_disengage(void)
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
if (engaged & (1UL << partid)) {
dev_info(xpc_part, "disengage from "
"remote partition %d timed "
"out\n", partid);
"remote partition %d timed "
"out\n", partid);
}
}
break;
......@@ -1161,17 +1115,16 @@ xpc_die_disengage(void)
if (time >= printmsg_time) {
dev_info(xpc_part, "waiting for remote partitions to "
"disengage, timeout in %ld seconds\n",
(disengage_request_timeout - time) /
sn_rtc_cycles_per_second);
"disengage, timeout in %ld seconds\n",
(disengage_request_timeout - time) /
sn_rtc_cycles_per_second);
printmsg_time = time +
(XPC_DISENGAGE_PRINTMSG_INTERVAL *
sn_rtc_cycles_per_second);
(XPC_DISENGAGE_PRINTMSG_INTERVAL *
sn_rtc_cycles_per_second);
}
}
}
/*
* This function is called when the system is being restarted or halted due
* to some sort of system failure. If this is the case we need to notify the
......@@ -1217,7 +1170,6 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
return NOTIFY_DONE;
}
int __init
xpc_init(void)
{
......@@ -1227,16 +1179,15 @@ xpc_init(void)
pid_t pid;
size_t buf_size;
if (!ia64_platform_is("sn2")) {
return -ENODEV;
}
buf_size = max(XPC_RP_VARS_SIZE,
XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
GFP_KERNEL, &xpc_remote_copy_buffer_base);
GFP_KERNEL,
&xpc_remote_copy_buffer_base);
if (xpc_remote_copy_buffer == NULL)
return -ENOMEM;
......@@ -1256,7 +1207,7 @@ xpc_init(void)
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
DBUG_ON((u64) part != L1_CACHE_ALIGN((u64) part));
DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
part->act_IRQ_rcvd = 0;
spin_lock_init(&part->act_lock);
......@@ -1265,8 +1216,8 @@ xpc_init(void)
init_timer(&part->disengage_request_timer);
part->disengage_request_timer.function =
xpc_timeout_partition_disengage_request;
part->disengage_request_timer.data = (unsigned long) part;
xpc_timeout_partition_disengage_request;
part->disengage_request_timer.data = (unsigned long)part;
part->setup_state = XPC_P_UNSET;
init_waitqueue_head(&part->teardown_wq);
......@@ -1292,7 +1243,7 @@ xpc_init(void)
* but rather immediately process the interrupt.
*/
ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
"xpc hb", NULL);
"xpc hb", NULL);
if (ret != 0) {
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);
......@@ -1327,7 +1278,6 @@ xpc_init(void)
return -EBUSY;
}
/* add ourselves to the reboot_notifier_list */
ret = register_reboot_notifier(&xpc_reboot_notifier);
if (ret != 0) {
......@@ -1355,10 +1305,10 @@ xpc_init(void)
xpc_rsvd_page->vars_pa = 0;
/* take ourselves off of the reboot_notifier_list */
(void) unregister_reboot_notifier(&xpc_reboot_notifier);
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
/* take ourselves off of the die_notifier list */
(void) unregister_die_notifier(&xpc_die_notifier);
(void)unregister_die_notifier(&xpc_die_notifier);
del_timer_sync(&xpc_hb_timer);
free_irq(SGI_XPC_ACTIVATE, NULL);
......@@ -1372,7 +1322,6 @@ xpc_init(void)
return -EBUSY;
}
/*
* Startup a thread that will attempt to discover other partitions to
* activate based on info provided by SAL. This new thread is short
......@@ -1389,7 +1338,6 @@ xpc_init(void)
return -EBUSY;
}
/* set the interface to point at XPC's functions */
xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
xpc_initiate_allocate, xpc_initiate_send,
......@@ -1398,16 +1346,16 @@ xpc_init(void)
return 0;
}
module_init(xpc_init);
module_init(xpc_init);
void __exit
xpc_exit(void)
{
xpc_do_exit(xpcUnloading);
}
module_exit(xpc_exit);
module_exit(xpc_exit);
MODULE_AUTHOR("Silicon Graphics, Inc.");
MODULE_DESCRIPTION("Cross Partition Communication (XPC) support");
......@@ -1415,17 +1363,16 @@ MODULE_LICENSE("GPL");
module_param(xpc_hb_interval, int, 0);
MODULE_PARM_DESC(xpc_hb_interval, "Number of seconds between "
"heartbeat increments.");
"heartbeat increments.");
module_param(xpc_hb_check_interval, int, 0);
MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
"heartbeat checks.");
"heartbeat checks.");
module_param(xpc_disengage_request_timelimit, int, 0);
MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait "
"for disengage request to complete.");
"for disengage request to complete.");
module_param(xpc_kdebug_ignore, int, 0);
MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
"other partitions when dropping into kdebug.");
"other partitions when dropping into kdebug.");
drivers/misc/sgi-xp/xpnet.c
View file @ 35190506
......@@ -6,7 +6,6 @@
* Copyright (C) 1999-2008 Silicon Graphics, Inc. All rights reserved.
*/
/*
* Cross Partition Network Interface (XPNET) support
*
......@@ -21,7 +20,6 @@
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
......@@ -40,7 +38,6 @@
#include <asm/atomic.h>
#include "xp.h"
/*
* The message payload transferred by XPC.
*
......@@ -79,7 +76,6 @@ struct xpnet_message {
#define XPNET_MSG_ALIGNED_SIZE (L1_CACHE_ALIGN(XPNET_MSG_SIZE))
#define XPNET_MSG_NENTRIES (PAGE_SIZE / XPNET_MSG_ALIGNED_SIZE)
#define XPNET_MAX_KTHREADS (XPNET_MSG_NENTRIES + 1)
#define XPNET_MAX_IDLE_KTHREADS (XPNET_MSG_NENTRIES + 1)
......@@ -91,9 +87,9 @@ struct xpnet_message {
#define XPNET_VERSION_MAJOR(_v) ((_v) >> 4)
#define XPNET_VERSION_MINOR(_v) ((_v) & 0xf)
#define XPNET_VERSION _XPNET_VERSION(1,0) /* version 1.0 */
#define XPNET_VERSION_EMBED _XPNET_VERSION(1,1) /* version 1.1 */
#define XPNET_MAGIC 0x88786984 /* "XNET" */
#define XPNET_VERSION _XPNET_VERSION(1,0) /* version 1.0 */
#define XPNET_VERSION_EMBED _XPNET_VERSION(1,1) /* version 1.1 */
#define XPNET_MAGIC 0x88786984 /* "XNET" */
#define XPNET_VALID_MSG(_m) \
((XPNET_VERSION_MAJOR(_m->version) == XPNET_VERSION_MAJOR(XPNET_VERSION)) \
......@@ -101,7 +97,6 @@ struct xpnet_message {
#define XPNET_DEVICE_NAME "xp0"
/*
* When messages are queued with xpc_send_notify, a kmalloc'd buffer
* of the following type is passed as a notification cookie. When the
......@@ -145,7 +140,6 @@ static DEFINE_SPINLOCK(xpnet_broadcast_lock);
/* 32KB has been determined to be the ideal */
#define XPNET_DEF_MTU (0x8000UL)
/*
* The partition id is encapsulated in the MAC address. The following
* define locates the octet the partid is in.
......@@ -153,7 +147,6 @@ static DEFINE_SPINLOCK(xpnet_broadcast_lock);
#define XPNET_PARTID_OCTET 1
#define XPNET_LICENSE_OCTET 2
/*
* Define the XPNET debug device structure that is to be used with dev_dbg(),
* dev_err(), dev_warn(), and dev_info().
......@@ -163,7 +156,7 @@ struct device_driver xpnet_dbg_name = {
};
struct device xpnet_dbg_subname = {
.bus_id = {0}, /* set to "" */
.bus_id = {0}, /* set to "" */
.driver = &xpnet_dbg_name
};
......@@ -178,14 +171,13 @@ xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
struct sk_buff *skb;
bte_result_t bret;
struct xpnet_dev_private *priv =
(struct xpnet_dev_private *) xpnet_device->priv;
(struct xpnet_dev_private *)xpnet_device->priv;
if (!XPNET_VALID_MSG(msg)) {
/*
* Packet with a different XPC version. Ignore.
*/
xpc_received(partid, channel, (void *) msg);
xpc_received(partid, channel, (void *)msg);
priv->stats.rx_errors++;
......@@ -194,14 +186,13 @@ xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
msg->leadin_ignore, msg->tailout_ignore);
/* reserve an extra cache line */
skb = dev_alloc_skb(msg->size + L1_CACHE_BYTES);
if (!skb) {
dev_err(xpnet, "failed on dev_alloc_skb(%d)\n",
msg->size + L1_CACHE_BYTES);
xpc_received(partid, channel, (void *) msg);
xpc_received(partid, channel, (void *)msg);
priv->stats.rx_errors++;
......@@ -227,12 +218,13 @@ xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
* Move the data over from the other side.
*/
if ((XPNET_VERSION_MINOR(msg->version) == 1) &&
(msg->embedded_bytes != 0)) {
(msg->embedded_bytes != 0)) {
dev_dbg(xpnet, "copying embedded message. memcpy(0x%p, 0x%p, "
"%lu)\n", skb->data, &msg->data,
(size_t) msg->embedded_bytes);
(size_t)msg->embedded_bytes);
skb_copy_to_linear_data(skb, &msg->data, (size_t)msg->embedded_bytes);
skb_copy_to_linear_data(skb, &msg->data,
(size_t)msg->embedded_bytes);
} else {
dev_dbg(xpnet, "transferring buffer to the skb->data area;\n\t"
"bte_copy(0x%p, 0x%p, %hu)\n", (void *)msg->buf_pa,
......@@ -250,10 +242,10 @@ xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
dev_err(xpnet, "bte_copy(0x%p, 0x%p, 0x%hx) returned "
"error=0x%x\n", (void *)msg->buf_pa,
(void *)__pa((u64)skb->data &
~(L1_CACHE_BYTES - 1)),
~(L1_CACHE_BYTES - 1)),
msg->size, bret);
xpc_received(partid, channel, (void *) msg);
xpc_received(partid, channel, (void *)msg);
priv->stats.rx_errors++;
......@@ -262,7 +254,7 @@ xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
}
dev_dbg(xpnet, "<skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
"skb->end=0x%p skb->len=%d\n", (void *) skb->head,
"skb->end=0x%p skb->len=%d\n", (void *)skb->head,
(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
skb->len);
......@@ -275,16 +267,14 @@ xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
(void *)skb->head, (void *)skb->data, skb_tail_pointer(skb),
skb_end_pointer(skb), skb->len);
xpnet_device->last_rx = jiffies;
priv->stats.rx_packets++;
priv->stats.rx_bytes += skb->len + ETH_HLEN;
netif_rx_ni(skb);
xpc_received(partid, channel, (void *) msg);
xpc_received(partid, channel, (void *)msg);
}
/*
* This is the handler which XPC calls during any sort of change in
* state or message reception on a connection.
......@@ -295,20 +285,19 @@ xpnet_connection_activity(enum xpc_retval reason, partid_t partid, int channel,
{
long bp;
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(channel != XPC_NET_CHANNEL);
switch(reason) {
switch (reason) {
case xpcMsgReceived: /* message received */
DBUG_ON(data == NULL);
xpnet_receive(partid, channel, (struct xpnet_message *) data);
xpnet_receive(partid, channel, (struct xpnet_message *)data);
break;
case xpcConnected: /* connection completed to a partition */
spin_lock_bh(&xpnet_broadcast_lock);
xpnet_broadcast_partitions |= 1UL << (partid -1 );
xpnet_broadcast_partitions |= 1UL << (partid - 1);
bp = xpnet_broadcast_partitions;
spin_unlock_bh(&xpnet_broadcast_lock);
......@@ -321,7 +310,7 @@ xpnet_connection_activity(enum xpc_retval reason, partid_t partid, int channel,
default:
spin_lock_bh(&xpnet_broadcast_lock);
xpnet_broadcast_partitions &= ~(1UL << (partid -1 ));
xpnet_broadcast_partitions &= ~(1UL << (partid - 1));
bp = xpnet_broadcast_partitions;
spin_unlock_bh(&xpnet_broadcast_lock);
......@@ -337,13 +326,11 @@ xpnet_connection_activity(enum xpc_retval reason, partid_t partid, int channel,
}
}
static int
xpnet_dev_open(struct net_device *dev)
{
enum xpc_retval ret;
dev_dbg(xpnet, "calling xpc_connect(%d, 0x%p, NULL, %ld, %ld, %ld, "
"%ld)\n", XPC_NET_CHANNEL, xpnet_connection_activity,
XPNET_MSG_SIZE, XPNET_MSG_NENTRIES, XPNET_MAX_KTHREADS,
......@@ -364,7 +351,6 @@ xpnet_dev_open(struct net_device *dev)
return 0;
}
static int
xpnet_dev_stop(struct net_device *dev)
{
......@@ -375,7 +361,6 @@ xpnet_dev_stop(struct net_device *dev)
return 0;
}
static int
xpnet_dev_change_mtu(struct net_device *dev, int new_mtu)
{
......@@ -392,7 +377,6 @@ xpnet_dev_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
/*
* Required for the net_device structure.
*/
......@@ -402,7 +386,6 @@ xpnet_dev_set_config(struct net_device *dev, struct ifmap *new_map)
return 0;
}
/*
* Return statistics to the caller.
*/
......@@ -411,13 +394,11 @@ xpnet_dev_get_stats(struct net_device *dev)
{
struct xpnet_dev_private *priv;
priv = (struct xpnet_dev_private *) dev->priv;
priv = (struct xpnet_dev_private *)dev->priv;
return &priv->stats;
}
/*
* Notification that the other end has received the message and
* DMA'd the skb information. At this point, they are done with
......@@ -426,11 +407,9 @@ xpnet_dev_get_stats(struct net_device *dev)
*/
static void
xpnet_send_completed(enum xpc_retval reason, partid_t partid, int channel,
void *__qm)
void *__qm)
{
struct xpnet_pending_msg *queued_msg =
(struct xpnet_pending_msg *) __qm;
struct xpnet_pending_msg *queued_msg = (struct xpnet_pending_msg *)__qm;
DBUG_ON(queued_msg == NULL);
......@@ -439,14 +418,13 @@ xpnet_send_completed(enum xpc_retval reason, partid_t partid, int channel,
if (atomic_dec_return(&queued_msg->use_count) == 0) {
dev_dbg(xpnet, "all acks for skb->head=-x%p\n",
(void *) queued_msg->skb->head);
(void *)queued_msg->skb->head);
dev_kfree_skb_any(queued_msg->skb);
kfree(queued_msg);
}
}
/*
* Network layer has formatted a packet (skb) and is ready to place it
* "on the wire". Prepare and send an xpnet_message to all partitions
......@@ -469,16 +447,13 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct xpnet_dev_private *priv;
u16 embedded_bytes;
priv = (struct xpnet_dev_private *) dev->priv;
priv = (struct xpnet_dev_private *)dev->priv;
dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
"skb->end=0x%p skb->len=%d\n", (void *) skb->head,
"skb->end=0x%p skb->len=%d\n", (void *)skb->head,
(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
skb->len);
/*
* The xpnet_pending_msg tracks how many outstanding
* xpc_send_notifies are relying on this skb. When none
......@@ -487,16 +462,15 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
queued_msg = kmalloc(sizeof(struct xpnet_pending_msg), GFP_ATOMIC);
if (queued_msg == NULL) {
dev_warn(xpnet, "failed to kmalloc %ld bytes; dropping "
"packet\n", sizeof(struct xpnet_pending_msg));
"packet\n", sizeof(struct xpnet_pending_msg));
priv->stats.tx_errors++;
return -ENOMEM;
}
/* get the beginning of the first cacheline and end of last */
start_addr = ((u64) skb->data & ~(L1_CACHE_BYTES - 1));
start_addr = ((u64)skb->data & ~(L1_CACHE_BYTES - 1));
end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));
/* calculate how many bytes to embed in the XPC message */
......@@ -506,7 +480,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
embedded_bytes = skb->len;
}
/*
* Since the send occurs asynchronously, we set the count to one
* and begin sending. Any sends that happen to complete before
......@@ -517,14 +490,13 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
atomic_set(&queued_msg->use_count, 1);
queued_msg->skb = skb;
second_mac_octet = skb->data[XPNET_PARTID_OCTET];
if (second_mac_octet == 0xff) {
/* we are being asked to broadcast to all partitions */
dp = xpnet_broadcast_partitions;
} else if (second_mac_octet != 0) {
dp = xpnet_broadcast_partitions &
(1UL << (second_mac_octet - 1));
(1UL << (second_mac_octet - 1));
} else {
/* 0 is an invalid partid. Ignore */
dp = 0;
......@@ -543,7 +515,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
for (dest_partid = 1; dp && dest_partid < XP_MAX_PARTITIONS;
dest_partid++) {
if (!(dp & (1UL << (dest_partid - 1)))) {
/* not destined for this partition */
continue;
......@@ -552,7 +523,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* remove this partition from the destinations mask */
dp &= ~(1UL << (dest_partid - 1));
/* found a partition to send to */
ret = xpc_allocate(dest_partid, XPC_NET_CHANNEL,
......@@ -565,7 +535,7 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(embedded_bytes != 0)) {
msg->version = XPNET_VERSION_EMBED;
dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
&msg->data, skb->data, (size_t) embedded_bytes);
&msg->data, skb->data, (size_t)embedded_bytes);
skb_copy_from_linear_data(skb, &msg->data,
(size_t)embedded_bytes);
} else {
......@@ -573,7 +543,7 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
}
msg->magic = XPNET_MAGIC;
msg->size = end_addr - start_addr;
msg->leadin_ignore = (u64) skb->data - start_addr;
msg->leadin_ignore = (u64)skb->data - start_addr;
msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
msg->buf_pa = __pa(start_addr);
......@@ -583,7 +553,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
msg->leadin_ignore, msg->tailout_ignore);
atomic_inc(&queued_msg->use_count);
ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, msg,
......@@ -599,7 +568,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
dev_dbg(xpnet, "no partitions to receive packet destined for "
"%d\n", dest_partid);
dev_kfree_skb(skb);
kfree(queued_msg);
}
......@@ -610,23 +578,20 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
return 0;
}
/*
* Deal with transmit timeouts coming from the network layer.
*/
static void
xpnet_dev_tx_timeout (struct net_device *dev)
xpnet_dev_tx_timeout(struct net_device *dev)
{
struct xpnet_dev_private *priv;
priv = (struct xpnet_dev_private *) dev->priv;
priv = (struct xpnet_dev_private *)dev->priv;
priv->stats.tx_errors++;
return;
}
static int __init
xpnet_init(void)
{
......@@ -634,7 +599,6 @@ xpnet_init(void)
u32 license_num;
int result = -ENOMEM;
if (!ia64_platform_is("sn2")) {
return -ENODEV;
}
......@@ -672,7 +636,7 @@ xpnet_init(void)
license_num = sn_partition_serial_number_val();
for (i = 3; i >= 0; i--) {
xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] =
license_num & 0xff;
license_num & 0xff;
license_num = license_num >> 8;
}
......@@ -696,23 +660,22 @@ xpnet_init(void)
return result;
}
module_init(xpnet_init);
module_init(xpnet_init);
static void __exit
xpnet_exit(void)
{
dev_info(xpnet, "unregistering network device %s\n",
xpnet_device[0].name);
xpnet_device[0].name);
unregister_netdev(xpnet_device);
free_netdev(xpnet_device);
}
module_exit(xpnet_exit);
module_exit(xpnet_exit);
MODULE_AUTHOR("Silicon Graphics, Inc.");
MODULE_DESCRIPTION("Cross Partition Network adapter (XPNET)");
MODULE_LICENSE("GPL");
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