diff options
| -rw-r--r-- | drivers/misc/sgi-xp/xpc.h | 3 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_channel.c | 197 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_main.c | 2 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_sn2.c | 205 |
4 files changed, 204 insertions, 203 deletions
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h index da26808..defd088 100644 --- a/drivers/misc/sgi-xp/xpc.h +++ b/drivers/misc/sgi-xp/xpc.h @@ -666,6 +666,8 @@ extern void (*xpc_online_heartbeat) (void); extern void (*xpc_check_remote_hb) (void); extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *); extern u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *); +extern enum xp_retval (*xpc_allocate_msgqueues) (struct xpc_channel *); +extern void (*xpc_free_msgqueues) (struct xpc_channel *); extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *); extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int); extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *); @@ -728,7 +730,6 @@ extern void xpc_deactivate_partition(const int, struct xpc_partition *, extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *); /* found in xpc_channel.c */ -extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **); extern void xpc_initiate_connect(int); extern void xpc_initiate_disconnect(int); extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *); diff --git a/drivers/misc/sgi-xp/xpc_channel.c b/drivers/misc/sgi-xp/xpc_channel.c index 0d3c153..1c73423 100644 --- a/drivers/misc/sgi-xp/xpc_channel.c +++ b/drivers/misc/sgi-xp/xpc_channel.c @@ -25,145 +25,6 @@ #include "xpc.h" /* - * Guarantee that the kzalloc'd memory is cacheline aligned. - */ -void * -xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base) -{ - /* see if kzalloc will give us cachline aligned memory by default */ - *base = kzalloc(size, flags); - if (*base == NULL) - return NULL; - - 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) - return NULL; - - return (void *)L1_CACHE_ALIGN((u64)*base); -} - -/* - * Allocate the local message queue and the notify queue. - */ -static enum xp_retval -xpc_allocate_local_msgqueue(struct xpc_channel *ch) -{ - unsigned long irq_flags; - int nentries; - size_t nbytes; - - 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) - continue; - - nbytes = nentries * sizeof(struct xpc_notify); - ch->notify_queue = kzalloc(nbytes, GFP_KERNEL); - if (ch->notify_queue == NULL) { - kfree(ch->local_msgqueue_base); - ch->local_msgqueue = NULL; - continue; - } - - spin_lock_irqsave(&ch->lock, irq_flags); - if (nentries < ch->local_nentries) { - dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, " - "partid=%d, channel=%d\n", nentries, - ch->local_nentries, ch->partid, ch->number); - - ch->local_nentries = nentries; - } - spin_unlock_irqrestore(&ch->lock, irq_flags); - 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 xpNoMemory; -} - -/* - * Allocate the cached remote message queue. - */ -static enum xp_retval -xpc_allocate_remote_msgqueue(struct xpc_channel *ch) -{ - unsigned long irq_flags; - int nentries; - size_t nbytes; - - DBUG_ON(ch->remote_nentries <= 0); - - 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) - continue; - - spin_lock_irqsave(&ch->lock, irq_flags); - if (nentries < ch->remote_nentries) { - dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, " - "partid=%d, channel=%d\n", nentries, - ch->remote_nentries, ch->partid, ch->number); - - ch->remote_nentries = nentries; - } - spin_unlock_irqrestore(&ch->lock, irq_flags); - 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 xpNoMemory; -} - -/* - * Allocate message queues and other stuff associated with a channel. - * - * Note: Assumes all of the channel sizes are filled in. - */ -static enum xp_retval -xpc_allocate_msgqueues(struct xpc_channel *ch) -{ - unsigned long irq_flags; - enum xp_retval ret; - - DBUG_ON(ch->flags & XPC_C_SETUP); - - ret = xpc_allocate_local_msgqueue(ch); - if (ret != xpSuccess) - return ret; - - ret = xpc_allocate_remote_msgqueue(ch); - if (ret != xpSuccess) { - kfree(ch->local_msgqueue_base); - ch->local_msgqueue = NULL; - kfree(ch->notify_queue); - ch->notify_queue = NULL; - return ret; - } - - spin_lock_irqsave(&ch->lock, irq_flags); - ch->flags |= XPC_C_SETUP; - spin_unlock_irqrestore(&ch->lock, irq_flags); - - return xpSuccess; -} - -/* * Process a connect message from a remote partition. * * Note: xpc_process_connect() is expecting to be called with the @@ -191,10 +52,11 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags) if (ret != xpSuccess) XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags); + ch->flags |= XPC_C_SETUP; + if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING)) return; - DBUG_ON(!(ch->flags & XPC_C_SETUP)); DBUG_ON(ch->local_msgqueue == NULL); DBUG_ON(ch->remote_msgqueue == NULL); } @@ -220,55 +82,6 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags) } /* - * Free up message queues and other stuff that were allocated for the specified - * channel. - * - * Note: ch->reason and ch->reason_line are left set for debugging purposes, - * they're cleared when XPC_C_DISCONNECTED is cleared. - */ -static void -xpc_free_msgqueues(struct xpc_channel *ch) -{ - struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2; - - DBUG_ON(!spin_is_locked(&ch->lock)); - DBUG_ON(atomic_read(&ch->n_to_notify) != 0); - - ch->remote_msgqueue_pa = 0; - ch->func = NULL; - ch->key = NULL; - ch->msg_size = 0; - ch->local_nentries = 0; - ch->remote_nentries = 0; - ch->kthreads_assigned_limit = 0; - ch->kthreads_idle_limit = 0; - - ch_sn2->local_GP->get = 0; - ch_sn2->local_GP->put = 0; - ch_sn2->remote_GP.get = 0; - ch_sn2->remote_GP.put = 0; - ch_sn2->w_local_GP.get = 0; - ch_sn2->w_local_GP.put = 0; - ch_sn2->w_remote_GP.get = 0; - ch_sn2->w_remote_GP.put = 0; - ch_sn2->next_msg_to_pull = 0; - - if (ch->flags & XPC_C_SETUP) { - ch->flags &= ~XPC_C_SETUP; - - dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n", - ch->flags, ch->partid, ch->number); - - kfree(ch->local_msgqueue_base); - ch->local_msgqueue = NULL; - kfree(ch->remote_msgqueue_base); - ch->remote_msgqueue = NULL; - kfree(ch->notify_queue); - ch->notify_queue = NULL; - } -} - -/* * spin_lock_irqsave() is expected to be held on entry. */ static void @@ -331,7 +144,11 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags) /* it's now safe to free the channel's message queues */ xpc_free_msgqueues(ch); - /* mark disconnected, clear all other flags except XPC_C_WDISCONNECT */ + /* + * Mark the channel disconnected and clear all other flags, including + * XPC_C_SETUP (because of call to xpc_free_msgqueues()) but not + * including XPC_C_WDISCONNECT (if it was set). + */ ch->flags = (XPC_C_DISCONNECTED | (ch->flags & XPC_C_WDISCONNECT)); atomic_dec(&part->nchannels_active); diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c index 2934b44..b5f3c5e 100644 --- a/drivers/misc/sgi-xp/xpc_main.c +++ b/drivers/misc/sgi-xp/xpc_main.c @@ -186,6 +186,8 @@ void (*xpc_check_remote_hb) (void); enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *part); void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *ch); u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *part); +enum xp_retval (*xpc_allocate_msgqueues) (struct xpc_channel *ch); +void (*xpc_free_msgqueues) (struct xpc_channel *ch); void (*xpc_process_msg_chctl_flags) (struct xpc_partition *part, int ch_number); int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *ch); struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *ch); diff --git a/drivers/misc/sgi-xp/xpc_sn2.c b/drivers/misc/sgi-xp/xpc_sn2.c index 01dd40e..e5dc8c4 100644 --- a/drivers/misc/sgi-xp/xpc_sn2.c +++ b/drivers/misc/sgi-xp/xpc_sn2.c @@ -1049,6 +1049,30 @@ xpc_process_activate_IRQ_rcvd_sn2(int n_IRQs_expected) } /* + * Guarantee that the kzalloc'd memory is cacheline aligned. + */ +static void * +xpc_kzalloc_cacheline_aligned_sn2(size_t size, gfp_t flags, void **base) +{ + /* see if kzalloc will give us cachline aligned memory by default */ + *base = kzalloc(size, flags); + if (*base == NULL) + return NULL; + + 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) + return NULL; + + return (void *)L1_CACHE_ALIGN((u64)*base); +} + +/* * Setup the infrastructure necessary to support XPartition Communication * between the specified remote partition and the local one. */ @@ -1078,10 +1102,9 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) /* allocate all the required GET/PUT values */ - part_sn2->local_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, - GFP_KERNEL, - &part_sn2-> - local_GPs_base); + part_sn2->local_GPs = + xpc_kzalloc_cacheline_aligned_sn2(XPC_GP_SIZE, GFP_KERNEL, + &part_sn2->local_GPs_base); if (part_sn2->local_GPs == NULL) { dev_err(xpc_chan, "can't get memory for local get/put " "values\n"); @@ -1089,10 +1112,9 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) goto out_1; } - part_sn2->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, - GFP_KERNEL, - &part_sn2-> - remote_GPs_base); + part_sn2->remote_GPs = + xpc_kzalloc_cacheline_aligned_sn2(XPC_GP_SIZE, GFP_KERNEL, + &part_sn2->remote_GPs_base); if (part_sn2->remote_GPs == NULL) { dev_err(xpc_chan, "can't get memory for remote get/put " "values\n"); @@ -1105,8 +1127,9 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) /* 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); + xpc_kzalloc_cacheline_aligned_sn2(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"); retval = xpNoMemory; @@ -1114,8 +1137,9 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) } part->remote_openclose_args = - xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL, - &part->remote_openclose_args_base); + xpc_kzalloc_cacheline_aligned_sn2(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"); retval = xpNoMemory; @@ -1528,6 +1552,161 @@ xpc_get_chctl_all_flags_sn2(struct xpc_partition *part) } /* + * Allocate the local message queue and the notify queue. + */ +static enum xp_retval +xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch) +{ + unsigned long irq_flags; + int nentries; + size_t nbytes; + + for (nentries = ch->local_nentries; nentries > 0; nentries--) { + + nbytes = nentries * ch->msg_size; + ch->local_msgqueue = + xpc_kzalloc_cacheline_aligned_sn2(nbytes, GFP_KERNEL, + &ch->local_msgqueue_base); + if (ch->local_msgqueue == NULL) + continue; + + nbytes = nentries * sizeof(struct xpc_notify); + ch->notify_queue = kzalloc(nbytes, GFP_KERNEL); + if (ch->notify_queue == NULL) { + kfree(ch->local_msgqueue_base); + ch->local_msgqueue = NULL; + continue; + } + + spin_lock_irqsave(&ch->lock, irq_flags); + if (nentries < ch->local_nentries) { + dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, " + "partid=%d, channel=%d\n", nentries, + ch->local_nentries, ch->partid, ch->number); + + ch->local_nentries = nentries; + } + spin_unlock_irqrestore(&ch->lock, irq_flags); + 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 xpNoMemory; +} + +/* + * Allocate the cached remote message queue. + */ +static enum xp_retval +xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch) +{ + unsigned long irq_flags; + int nentries; + size_t nbytes; + + DBUG_ON(ch->remote_nentries <= 0); + + for (nentries = ch->remote_nentries; nentries > 0; nentries--) { + + nbytes = nentries * ch->msg_size; + ch->remote_msgqueue = + xpc_kzalloc_cacheline_aligned_sn2(nbytes, GFP_KERNEL, + &ch->remote_msgqueue_base); + if (ch->remote_msgqueue == NULL) + continue; + + spin_lock_irqsave(&ch->lock, irq_flags); + if (nentries < ch->remote_nentries) { + dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, " + "partid=%d, channel=%d\n", nentries, + ch->remote_nentries, ch->partid, ch->number); + + ch->remote_nentries = nentries; + } + spin_unlock_irqrestore(&ch->lock, irq_flags); + 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 xpNoMemory; +} + +/* + * Allocate message queues and other stuff associated with a channel. + * + * Note: Assumes all of the channel sizes are filled in. + */ +static enum xp_retval +xpc_allocate_msgqueues_sn2(struct xpc_channel *ch) +{ + enum xp_retval ret; + + DBUG_ON(ch->flags & XPC_C_SETUP); + + ret = xpc_allocate_local_msgqueue_sn2(ch); + if (ret == xpSuccess) { + + ret = xpc_allocate_remote_msgqueue_sn2(ch); + if (ret != xpSuccess) { + kfree(ch->local_msgqueue_base); + ch->local_msgqueue = NULL; + kfree(ch->notify_queue); + ch->notify_queue = NULL; + } + } + return ret; +} + +/* + * Free up message queues and other stuff that were allocated for the specified + * channel. + * + * Note: ch->reason and ch->reason_line are left set for debugging purposes, + * they're cleared when XPC_C_DISCONNECTED is cleared. + */ +static void +xpc_free_msgqueues_sn2(struct xpc_channel *ch) +{ + struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2; + + DBUG_ON(!spin_is_locked(&ch->lock)); + DBUG_ON(atomic_read(&ch->n_to_notify) != 0); + + ch->remote_msgqueue_pa = 0; + ch->func = NULL; + ch->key = NULL; + ch->msg_size = 0; + ch->local_nentries = 0; + ch->remote_nentries = 0; + ch->kthreads_assigned_limit = 0; + ch->kthreads_idle_limit = 0; + + ch_sn2->local_GP->get = 0; + ch_sn2->local_GP->put = 0; + ch_sn2->remote_GP.get = 0; + ch_sn2->remote_GP.put = 0; + ch_sn2->w_local_GP.get = 0; + ch_sn2->w_local_GP.put = 0; + ch_sn2->w_remote_GP.get = 0; + ch_sn2->w_remote_GP.put = 0; + ch_sn2->next_msg_to_pull = 0; + + if (ch->flags & XPC_C_SETUP) { + dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n", + ch->flags, ch->partid, ch->number); + + kfree(ch->local_msgqueue_base); + ch->local_msgqueue = NULL; + kfree(ch->remote_msgqueue_base); + ch->remote_msgqueue = NULL; + kfree(ch->notify_queue); + ch->notify_queue = NULL; + } +} + +/* * Notify those who wanted to be notified upon delivery of their message. */ static void @@ -2177,6 +2356,8 @@ xpc_init_sn2(void) xpc_teardown_infrastructure = xpc_teardown_infrastructure_sn2; xpc_make_first_contact = xpc_make_first_contact_sn2; xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_sn2; + xpc_allocate_msgqueues = xpc_allocate_msgqueues_sn2; + xpc_free_msgqueues = xpc_free_msgqueues_sn2; xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2; xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2; xpc_n_of_deliverable_msgs = xpc_n_of_deliverable_msgs_sn2; |