2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
10 * Cross Partition Communication (XPC) uv-based functions.
12 * Architecture specific implementation of common functions.
16 #include <linux/kernel.h>
18 #include <linux/interrupt.h>
19 #include <linux/delay.h>
20 #include <linux/device.h>
21 #include <linux/err.h>
22 #include <asm/uv/uv_hub.h>
23 #if defined CONFIG_X86_64
24 #include <asm/uv/bios.h>
25 #include <asm/uv/uv_irq.h>
26 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
27 #include <asm/sn/intr.h>
28 #include <asm/sn/sn_sal.h>
30 #include "../sgi-gru/gru.h"
31 #include "../sgi-gru/grukservices.h"
34 #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
35 struct uv_IO_APIC_route_entry {
49 static struct xpc_heartbeat_uv *xpc_heartbeat_uv;
51 #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
52 #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
53 XPC_ACTIVATE_MSG_SIZE_UV)
54 #define XPC_ACTIVATE_IRQ_NAME "xpc_activate"
56 #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES)
57 #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
58 XPC_NOTIFY_MSG_SIZE_UV)
59 #define XPC_NOTIFY_IRQ_NAME "xpc_notify"
61 static struct xpc_gru_mq_uv *xpc_activate_mq_uv;
62 static struct xpc_gru_mq_uv *xpc_notify_mq_uv;
65 xpc_setup_partitions_uv(void)
68 struct xpc_partition_uv *part_uv;
70 for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
71 part_uv = &xpc_partitions[partid].sn.uv;
73 mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex);
74 spin_lock_init(&part_uv->flags_lock);
75 part_uv->remote_act_state = XPC_P_AS_INACTIVE;
81 xpc_teardown_partitions_uv(void)
84 struct xpc_partition_uv *part_uv;
85 unsigned long irq_flags;
87 for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
88 part_uv = &xpc_partitions[partid].sn.uv;
90 if (part_uv->cached_activate_gru_mq_desc != NULL) {
91 mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
92 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
93 part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
94 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
95 kfree(part_uv->cached_activate_gru_mq_desc);
96 part_uv->cached_activate_gru_mq_desc = NULL;
97 mutex_unlock(&part_uv->
98 cached_activate_gru_mq_desc_mutex);
104 xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
106 int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
108 #if defined CONFIG_X86_64
109 mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset,
112 dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
117 mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset);
119 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
120 if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
121 mq->irq = SGI_XPC_ACTIVATE;
122 else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
123 mq->irq = SGI_XPC_NOTIFY;
127 mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
128 uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value);
130 #error not a supported configuration
137 xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
139 #if defined CONFIG_X86_64
140 uv_teardown_irq(mq->irq);
142 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
144 unsigned long mmr_value;
146 mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
147 mmr_value = 1UL << 16;
149 uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
151 #error not a supported configuration
156 xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
160 #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
161 int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
163 ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address),
164 mq->order, &mq->mmr_offset);
166 dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n",
170 #elif defined CONFIG_X86_64
171 ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address),
172 mq->order, &mq->mmr_offset);
174 dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, "
179 #error not a supported configuration
182 mq->watchlist_num = ret;
187 xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
190 int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
192 #if defined CONFIG_X86_64
193 ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
194 BUG_ON(ret != BIOS_STATUS_SUCCESS);
195 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
196 ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
197 BUG_ON(ret != SALRET_OK);
199 #error not a supported configuration
203 static struct xpc_gru_mq_uv *
204 xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name,
205 irq_handler_t irq_handler)
207 enum xp_retval xp_ret;
212 struct xpc_gru_mq_uv *mq;
213 struct uv_IO_APIC_route_entry *mmr_value;
215 mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL);
217 dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
218 "a xpc_gru_mq_uv structure\n");
223 mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc),
225 if (mq->gru_mq_desc == NULL) {
226 dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
227 "a gru_message_queue_desc structure\n");
232 pg_order = get_order(mq_size);
233 mq->order = pg_order + PAGE_SHIFT;
234 mq_size = 1UL << mq->order;
236 mq->mmr_blade = uv_cpu_to_blade_id(cpu);
238 nid = cpu_to_node(cpu);
239 page = alloc_pages_exact_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
242 dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
243 "bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
247 mq->address = page_address(page);
249 /* enable generation of irq when GRU mq operation occurs to this mq */
250 ret = xpc_gru_mq_watchlist_alloc_uv(mq);
254 ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name);
258 ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
260 dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
265 mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value;
266 ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size,
267 nid, mmr_value->vector, mmr_value->dest);
269 dev_err(xpc_part, "gru_create_message_queue() returned "
275 /* allow other partitions to access this GRU mq */
276 xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
277 if (xp_ret != xpSuccess) {
284 /* something went wrong */
286 free_irq(mq->irq, NULL);
288 xpc_release_gru_mq_irq_uv(mq);
290 xpc_gru_mq_watchlist_free_uv(mq);
292 free_pages((unsigned long)mq->address, pg_order);
294 kfree(mq->gru_mq_desc);
302 xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
304 unsigned int mq_size;
308 /* disallow other partitions to access GRU mq */
309 mq_size = 1UL << mq->order;
310 ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size);
311 BUG_ON(ret != xpSuccess);
313 /* unregister irq handler and release mq irq/vector mapping */
314 free_irq(mq->irq, NULL);
315 xpc_release_gru_mq_irq_uv(mq);
317 /* disable generation of irq when GRU mq op occurs to this mq */
318 xpc_gru_mq_watchlist_free_uv(mq);
320 pg_order = mq->order - PAGE_SHIFT;
321 free_pages((unsigned long)mq->address, pg_order);
326 static enum xp_retval
327 xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg,
330 enum xp_retval xp_ret;
334 ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size);
340 if (ret == MQE_QUEUE_FULL) {
341 dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
342 "error=MQE_QUEUE_FULL\n");
343 /* !!! handle QLimit reached; delay & try again */
344 /* ??? Do we add a limit to the number of retries? */
345 (void)msleep_interruptible(10);
346 } else if (ret == MQE_CONGESTION) {
347 dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
348 "error=MQE_CONGESTION\n");
349 /* !!! handle LB Overflow; simply try again */
350 /* ??? Do we add a limit to the number of retries? */
352 /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */
353 dev_err(xpc_chan, "gru_send_message_gpa() returned "
355 xp_ret = xpGruSendMqError;
363 xpc_process_activate_IRQ_rcvd_uv(void)
365 unsigned long irq_flags;
367 struct xpc_partition *part;
370 DBUG_ON(xpc_activate_IRQ_rcvd == 0);
372 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
373 for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
374 part = &xpc_partitions[partid];
376 if (part->sn.uv.act_state_req == 0)
379 xpc_activate_IRQ_rcvd--;
380 BUG_ON(xpc_activate_IRQ_rcvd < 0);
382 act_state_req = part->sn.uv.act_state_req;
383 part->sn.uv.act_state_req = 0;
384 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
386 if (act_state_req == XPC_P_ASR_ACTIVATE_UV) {
387 if (part->act_state == XPC_P_AS_INACTIVE)
388 xpc_activate_partition(part);
389 else if (part->act_state == XPC_P_AS_DEACTIVATING)
390 XPC_DEACTIVATE_PARTITION(part, xpReactivating);
392 } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) {
393 if (part->act_state == XPC_P_AS_INACTIVE)
394 xpc_activate_partition(part);
396 XPC_DEACTIVATE_PARTITION(part, xpReactivating);
398 } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) {
399 XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason);
405 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
406 if (xpc_activate_IRQ_rcvd == 0)
409 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
414 xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
415 struct xpc_activate_mq_msghdr_uv *msg_hdr,
416 int *wakeup_hb_checker)
418 unsigned long irq_flags;
419 struct xpc_partition_uv *part_uv = &part->sn.uv;
420 struct xpc_openclose_args *args;
422 part_uv->remote_act_state = msg_hdr->act_state;
424 switch (msg_hdr->type) {
425 case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
426 /* syncing of remote_act_state was just done above */
429 case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
430 struct xpc_activate_mq_msg_activate_req_uv *msg;
433 * ??? Do we deal here with ts_jiffies being different
434 * ??? if act_state != XPC_P_AS_INACTIVE instead of
437 msg = container_of(msg_hdr, struct
438 xpc_activate_mq_msg_activate_req_uv, hdr);
440 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
441 if (part_uv->act_state_req == 0)
442 xpc_activate_IRQ_rcvd++;
443 part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
444 part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
445 part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
446 part_uv->heartbeat_gpa = msg->heartbeat_gpa;
448 if (msg->activate_gru_mq_desc_gpa !=
449 part_uv->activate_gru_mq_desc_gpa) {
450 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
451 part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
452 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
453 part_uv->activate_gru_mq_desc_gpa =
454 msg->activate_gru_mq_desc_gpa;
456 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
458 (*wakeup_hb_checker)++;
461 case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
462 struct xpc_activate_mq_msg_deactivate_req_uv *msg;
464 msg = container_of(msg_hdr, struct
465 xpc_activate_mq_msg_deactivate_req_uv, hdr);
467 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
468 if (part_uv->act_state_req == 0)
469 xpc_activate_IRQ_rcvd++;
470 part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
471 part_uv->reason = msg->reason;
472 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
474 (*wakeup_hb_checker)++;
477 case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
478 struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
480 msg = container_of(msg_hdr, struct
481 xpc_activate_mq_msg_chctl_closerequest_uv,
483 args = &part->remote_openclose_args[msg->ch_number];
484 args->reason = msg->reason;
486 spin_lock_irqsave(&part->chctl_lock, irq_flags);
487 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
488 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
490 xpc_wakeup_channel_mgr(part);
493 case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
494 struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
496 msg = container_of(msg_hdr, struct
497 xpc_activate_mq_msg_chctl_closereply_uv,
500 spin_lock_irqsave(&part->chctl_lock, irq_flags);
501 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
502 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
504 xpc_wakeup_channel_mgr(part);
507 case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
508 struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
510 msg = container_of(msg_hdr, struct
511 xpc_activate_mq_msg_chctl_openrequest_uv,
513 args = &part->remote_openclose_args[msg->ch_number];
514 args->entry_size = msg->entry_size;
515 args->local_nentries = msg->local_nentries;
517 spin_lock_irqsave(&part->chctl_lock, irq_flags);
518 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
519 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
521 xpc_wakeup_channel_mgr(part);
524 case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
525 struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
527 msg = container_of(msg_hdr, struct
528 xpc_activate_mq_msg_chctl_openreply_uv, hdr);
529 args = &part->remote_openclose_args[msg->ch_number];
530 args->remote_nentries = msg->remote_nentries;
531 args->local_nentries = msg->local_nentries;
532 args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
534 spin_lock_irqsave(&part->chctl_lock, irq_flags);
535 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
536 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
538 xpc_wakeup_channel_mgr(part);
541 case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: {
542 struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg;
544 msg = container_of(msg_hdr, struct
545 xpc_activate_mq_msg_chctl_opencomplete_uv, hdr);
546 spin_lock_irqsave(&part->chctl_lock, irq_flags);
547 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE;
548 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
550 xpc_wakeup_channel_mgr(part);
552 case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
553 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
554 part_uv->flags |= XPC_P_ENGAGED_UV;
555 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
558 case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
559 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
560 part_uv->flags &= ~XPC_P_ENGAGED_UV;
561 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
565 dev_err(xpc_part, "received unknown activate_mq msg type=%d "
566 "from partition=%d\n", msg_hdr->type, XPC_PARTID(part));
568 /* get hb checker to deactivate from the remote partition */
569 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
570 if (part_uv->act_state_req == 0)
571 xpc_activate_IRQ_rcvd++;
572 part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
573 part_uv->reason = xpBadMsgType;
574 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
576 (*wakeup_hb_checker)++;
580 if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
581 part->remote_rp_ts_jiffies != 0) {
583 * ??? Does what we do here need to be sensitive to
584 * ??? act_state or remote_act_state?
586 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
587 if (part_uv->act_state_req == 0)
588 xpc_activate_IRQ_rcvd++;
589 part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
590 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
592 (*wakeup_hb_checker)++;
597 xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
599 struct xpc_activate_mq_msghdr_uv *msg_hdr;
601 struct xpc_partition *part;
602 int wakeup_hb_checker = 0;
606 msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc);
610 partid = msg_hdr->partid;
611 if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
612 dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() "
613 "received invalid partid=0x%x in message\n",
616 part = &xpc_partitions[partid];
618 part_referenced = xpc_part_ref(part);
619 xpc_handle_activate_mq_msg_uv(part, msg_hdr,
622 xpc_part_deref(part);
625 gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr);
628 if (wakeup_hb_checker)
629 wake_up_interruptible(&xpc_activate_IRQ_wq);
634 static enum xp_retval
635 xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc,
636 unsigned long gru_mq_desc_gpa)
640 ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa,
641 sizeof(struct gru_message_queue_desc));
642 if (ret == xpSuccess)
643 gru_mq_desc->mq = NULL;
648 static enum xp_retval
649 xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
652 struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
653 struct xpc_partition_uv *part_uv = &part->sn.uv;
654 struct gru_message_queue_desc *gru_mq_desc;
655 unsigned long irq_flags;
658 DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
660 msg_hdr->type = msg_type;
661 msg_hdr->partid = xp_partition_id;
662 msg_hdr->act_state = part->act_state;
663 msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
665 mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
667 if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) {
668 gru_mq_desc = part_uv->cached_activate_gru_mq_desc;
669 if (gru_mq_desc == NULL) {
670 gru_mq_desc = kmalloc(sizeof(struct
671 gru_message_queue_desc),
673 if (gru_mq_desc == NULL) {
677 part_uv->cached_activate_gru_mq_desc = gru_mq_desc;
680 ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc,
682 activate_gru_mq_desc_gpa);
683 if (ret != xpSuccess)
686 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
687 part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
688 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
691 /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
692 ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg,
694 if (ret != xpSuccess) {
695 smp_rmb(); /* ensure a fresh copy of part_uv->flags */
696 if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV))
700 mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex);
705 xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg,
706 size_t msg_size, int msg_type)
710 ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
711 if (unlikely(ret != xpSuccess))
712 XPC_DEACTIVATE_PARTITION(part, ret);
716 xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
717 void *msg, size_t msg_size, int msg_type)
719 struct xpc_partition *part = &xpc_partitions[ch->partid];
722 ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
723 if (unlikely(ret != xpSuccess)) {
724 if (irq_flags != NULL)
725 spin_unlock_irqrestore(&ch->lock, *irq_flags);
727 XPC_DEACTIVATE_PARTITION(part, ret);
729 if (irq_flags != NULL)
730 spin_lock_irqsave(&ch->lock, *irq_flags);
735 xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req)
737 unsigned long irq_flags;
738 struct xpc_partition_uv *part_uv = &part->sn.uv;
741 * !!! Make our side think that the remote partition sent an activate
742 * !!! mq message our way by doing what the activate IRQ handler would
743 * !!! do had one really been sent.
746 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
747 if (part_uv->act_state_req == 0)
748 xpc_activate_IRQ_rcvd++;
749 part_uv->act_state_req = act_state_req;
750 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
752 wake_up_interruptible(&xpc_activate_IRQ_wq);
755 static enum xp_retval
756 xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
762 #if defined CONFIG_X86_64
763 status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa,
765 if (status == BIOS_STATUS_SUCCESS)
767 else if (status == BIOS_STATUS_MORE_PASSES)
768 ret = xpNeedMoreInfo;
772 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
773 status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
774 if (status == SALRET_OK)
776 else if (status == SALRET_MORE_PASSES)
777 ret = xpNeedMoreInfo;
782 #error not a supported configuration
789 xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp)
792 &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat;
793 rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv);
794 rp->sn.uv.activate_gru_mq_desc_gpa =
795 uv_gpa(xpc_activate_mq_uv->gru_mq_desc);
800 xpc_allow_hb_uv(short partid)
805 xpc_disallow_hb_uv(short partid)
810 xpc_disallow_all_hbs_uv(void)
815 xpc_increment_heartbeat_uv(void)
817 xpc_heartbeat_uv->value++;
821 xpc_offline_heartbeat_uv(void)
823 xpc_increment_heartbeat_uv();
824 xpc_heartbeat_uv->offline = 1;
828 xpc_online_heartbeat_uv(void)
830 xpc_increment_heartbeat_uv();
831 xpc_heartbeat_uv->offline = 0;
835 xpc_heartbeat_init_uv(void)
837 xpc_heartbeat_uv->value = 1;
838 xpc_heartbeat_uv->offline = 0;
842 xpc_heartbeat_exit_uv(void)
844 xpc_offline_heartbeat_uv();
847 static enum xp_retval
848 xpc_get_remote_heartbeat_uv(struct xpc_partition *part)
850 struct xpc_partition_uv *part_uv = &part->sn.uv;
853 ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat),
854 part_uv->heartbeat_gpa,
855 sizeof(struct xpc_heartbeat_uv));
856 if (ret != xpSuccess)
859 if (part_uv->cached_heartbeat.value == part->last_heartbeat &&
860 !part_uv->cached_heartbeat.offline) {
864 part->last_heartbeat = part_uv->cached_heartbeat.value;
870 xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
871 unsigned long remote_rp_gpa, int nasid)
873 short partid = remote_rp->SAL_partid;
874 struct xpc_partition *part = &xpc_partitions[partid];
875 struct xpc_activate_mq_msg_activate_req_uv msg;
877 part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
878 part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
879 part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa;
880 part->sn.uv.activate_gru_mq_desc_gpa =
881 remote_rp->sn.uv.activate_gru_mq_desc_gpa;
884 * ??? Is it a good idea to make this conditional on what is
885 * ??? potentially stale state information?
887 if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
888 msg.rp_gpa = uv_gpa(xpc_rsvd_page);
889 msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa;
890 msg.activate_gru_mq_desc_gpa =
891 xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa;
892 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
893 XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
896 if (part->act_state == XPC_P_AS_INACTIVE)
897 xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
901 xpc_request_partition_reactivation_uv(struct xpc_partition *part)
903 xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
907 xpc_request_partition_deactivation_uv(struct xpc_partition *part)
909 struct xpc_activate_mq_msg_deactivate_req_uv msg;
912 * ??? Is it a good idea to make this conditional on what is
913 * ??? potentially stale state information?
915 if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING &&
916 part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) {
918 msg.reason = part->reason;
919 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
920 XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV);
925 xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part)
927 /* nothing needs to be done */
932 xpc_init_fifo_uv(struct xpc_fifo_head_uv *head)
936 spin_lock_init(&head->lock);
941 xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head)
943 unsigned long irq_flags;
944 struct xpc_fifo_entry_uv *first;
946 spin_lock_irqsave(&head->lock, irq_flags);
948 if (head->first != NULL) {
949 head->first = first->next;
950 if (head->first == NULL)
954 BUG_ON(head->n_entries < 0);
955 spin_unlock_irqrestore(&head->lock, irq_flags);
961 xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head,
962 struct xpc_fifo_entry_uv *last)
964 unsigned long irq_flags;
967 spin_lock_irqsave(&head->lock, irq_flags);
968 if (head->last != NULL)
969 head->last->next = last;
974 spin_unlock_irqrestore(&head->lock, irq_flags);
978 xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head)
980 return head->n_entries;
984 * Setup the channel structures that are uv specific.
986 static enum xp_retval
987 xpc_setup_ch_structures_uv(struct xpc_partition *part)
989 struct xpc_channel_uv *ch_uv;
992 for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
993 ch_uv = &part->channels[ch_number].sn.uv;
995 xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
996 xpc_init_fifo_uv(&ch_uv->recv_msg_list);
1003 * Teardown the channel structures that are uv specific.
1006 xpc_teardown_ch_structures_uv(struct xpc_partition *part)
1008 /* nothing needs to be done */
1012 static enum xp_retval
1013 xpc_make_first_contact_uv(struct xpc_partition *part)
1015 struct xpc_activate_mq_msg_uv msg;
1018 * We send a sync msg to get the remote partition's remote_act_state
1019 * updated to our current act_state which at this point should
1020 * be XPC_P_AS_ACTIVATING.
1022 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1023 XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV);
1025 while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) {
1027 dev_dbg(xpc_part, "waiting to make first contact with "
1028 "partition %d\n", XPC_PARTID(part));
1030 /* wait a 1/4 of a second or so */
1031 (void)msleep_interruptible(250);
1033 if (part->act_state == XPC_P_AS_DEACTIVATING)
1034 return part->reason;
1041 xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
1043 unsigned long irq_flags;
1044 union xpc_channel_ctl_flags chctl;
1046 spin_lock_irqsave(&part->chctl_lock, irq_flags);
1047 chctl = part->chctl;
1048 if (chctl.all_flags != 0)
1049 part->chctl.all_flags = 0;
1051 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
1052 return chctl.all_flags;
1055 static enum xp_retval
1056 xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch)
1058 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1059 struct xpc_send_msg_slot_uv *msg_slot;
1060 unsigned long irq_flags;
1065 for (nentries = ch->local_nentries; nentries > 0; nentries--) {
1066 nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv);
1067 ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL);
1068 if (ch_uv->send_msg_slots == NULL)
1071 for (entry = 0; entry < nentries; entry++) {
1072 msg_slot = &ch_uv->send_msg_slots[entry];
1074 msg_slot->msg_slot_number = entry;
1075 xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list,
1079 spin_lock_irqsave(&ch->lock, irq_flags);
1080 if (nentries < ch->local_nentries)
1081 ch->local_nentries = nentries;
1082 spin_unlock_irqrestore(&ch->lock, irq_flags);
1089 static enum xp_retval
1090 xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch)
1092 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1093 struct xpc_notify_mq_msg_uv *msg_slot;
1094 unsigned long irq_flags;
1099 for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
1100 nbytes = nentries * ch->entry_size;
1101 ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL);
1102 if (ch_uv->recv_msg_slots == NULL)
1105 for (entry = 0; entry < nentries; entry++) {
1106 msg_slot = ch_uv->recv_msg_slots +
1107 entry * ch->entry_size;
1109 msg_slot->hdr.msg_slot_number = entry;
1112 spin_lock_irqsave(&ch->lock, irq_flags);
1113 if (nentries < ch->remote_nentries)
1114 ch->remote_nentries = nentries;
1115 spin_unlock_irqrestore(&ch->lock, irq_flags);
1123 * Allocate msg_slots associated with the channel.
1125 static enum xp_retval
1126 xpc_setup_msg_structures_uv(struct xpc_channel *ch)
1128 static enum xp_retval ret;
1129 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1131 DBUG_ON(ch->flags & XPC_C_SETUP);
1133 ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct
1134 gru_message_queue_desc),
1136 if (ch_uv->cached_notify_gru_mq_desc == NULL)
1139 ret = xpc_allocate_send_msg_slot_uv(ch);
1140 if (ret == xpSuccess) {
1142 ret = xpc_allocate_recv_msg_slot_uv(ch);
1143 if (ret != xpSuccess) {
1144 kfree(ch_uv->send_msg_slots);
1145 xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1152 * Free up msg_slots and clear other stuff that were setup for the specified
1156 xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
1158 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1160 DBUG_ON(!spin_is_locked(&ch->lock));
1162 kfree(ch_uv->cached_notify_gru_mq_desc);
1163 ch_uv->cached_notify_gru_mq_desc = NULL;
1165 if (ch->flags & XPC_C_SETUP) {
1166 xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1167 kfree(ch_uv->send_msg_slots);
1168 xpc_init_fifo_uv(&ch_uv->recv_msg_list);
1169 kfree(ch_uv->recv_msg_slots);
1174 xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1176 struct xpc_activate_mq_msg_chctl_closerequest_uv msg;
1178 msg.ch_number = ch->number;
1179 msg.reason = ch->reason;
1180 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1181 XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV);
1185 xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1187 struct xpc_activate_mq_msg_chctl_closereply_uv msg;
1189 msg.ch_number = ch->number;
1190 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1191 XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV);
1195 xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1197 struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
1199 msg.ch_number = ch->number;
1200 msg.entry_size = ch->entry_size;
1201 msg.local_nentries = ch->local_nentries;
1202 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1203 XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV);
1207 xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1209 struct xpc_activate_mq_msg_chctl_openreply_uv msg;
1211 msg.ch_number = ch->number;
1212 msg.local_nentries = ch->local_nentries;
1213 msg.remote_nentries = ch->remote_nentries;
1214 msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc);
1215 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1216 XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
1220 xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1222 struct xpc_activate_mq_msg_chctl_opencomplete_uv msg;
1224 msg.ch_number = ch->number;
1225 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1226 XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV);
1230 xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number)
1232 unsigned long irq_flags;
1234 spin_lock_irqsave(&part->chctl_lock, irq_flags);
1235 part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST;
1236 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
1238 xpc_wakeup_channel_mgr(part);
1241 static enum xp_retval
1242 xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
1243 unsigned long gru_mq_desc_gpa)
1245 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1247 DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL);
1248 return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc,
1253 xpc_indicate_partition_engaged_uv(struct xpc_partition *part)
1255 struct xpc_activate_mq_msg_uv msg;
1257 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1258 XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV);
1262 xpc_indicate_partition_disengaged_uv(struct xpc_partition *part)
1264 struct xpc_activate_mq_msg_uv msg;
1266 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1267 XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV);
1271 xpc_assume_partition_disengaged_uv(short partid)
1273 struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv;
1274 unsigned long irq_flags;
1276 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
1277 part_uv->flags &= ~XPC_P_ENGAGED_UV;
1278 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
1282 xpc_partition_engaged_uv(short partid)
1284 return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
1288 xpc_any_partition_engaged_uv(void)
1290 struct xpc_partition_uv *part_uv;
1293 for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
1294 part_uv = &xpc_partitions[partid].sn.uv;
1295 if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
1301 static enum xp_retval
1302 xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags,
1303 struct xpc_send_msg_slot_uv **address_of_msg_slot)
1306 struct xpc_send_msg_slot_uv *msg_slot;
1307 struct xpc_fifo_entry_uv *entry;
1310 entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list);
1314 if (flags & XPC_NOWAIT)
1317 ret = xpc_allocate_msg_wait(ch);
1318 if (ret != xpInterrupted && ret != xpTimeout)
1322 msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next);
1323 *address_of_msg_slot = msg_slot;
1328 xpc_free_msg_slot_uv(struct xpc_channel *ch,
1329 struct xpc_send_msg_slot_uv *msg_slot)
1331 xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next);
1333 /* wakeup anyone waiting for a free msg slot */
1334 if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
1335 wake_up(&ch->msg_allocate_wq);
1339 xpc_notify_sender_uv(struct xpc_channel *ch,
1340 struct xpc_send_msg_slot_uv *msg_slot,
1341 enum xp_retval reason)
1343 xpc_notify_func func = msg_slot->func;
1345 if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) {
1347 atomic_dec(&ch->n_to_notify);
1349 dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p "
1350 "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
1351 msg_slot->msg_slot_number, ch->partid, ch->number);
1353 func(reason, ch->partid, ch->number, msg_slot->key);
1355 dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p "
1356 "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
1357 msg_slot->msg_slot_number, ch->partid, ch->number);
1362 xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch,
1363 struct xpc_notify_mq_msg_uv *msg)
1365 struct xpc_send_msg_slot_uv *msg_slot;
1366 int entry = msg->hdr.msg_slot_number % ch->local_nentries;
1368 msg_slot = &ch->sn.uv.send_msg_slots[entry];
1370 BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number);
1371 msg_slot->msg_slot_number += ch->local_nentries;
1373 if (msg_slot->func != NULL)
1374 xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered);
1376 xpc_free_msg_slot_uv(ch, msg_slot);
1380 xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
1381 struct xpc_notify_mq_msg_uv *msg)
1383 struct xpc_partition_uv *part_uv = &part->sn.uv;
1384 struct xpc_channel *ch;
1385 struct xpc_channel_uv *ch_uv;
1386 struct xpc_notify_mq_msg_uv *msg_slot;
1387 unsigned long irq_flags;
1388 int ch_number = msg->hdr.ch_number;
1390 if (unlikely(ch_number >= part->nchannels)) {
1391 dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
1392 "channel number=0x%x in message from partid=%d\n",
1393 ch_number, XPC_PARTID(part));
1395 /* get hb checker to deactivate from the remote partition */
1396 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
1397 if (part_uv->act_state_req == 0)
1398 xpc_activate_IRQ_rcvd++;
1399 part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
1400 part_uv->reason = xpBadChannelNumber;
1401 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
1403 wake_up_interruptible(&xpc_activate_IRQ_wq);
1407 ch = &part->channels[ch_number];
1408 xpc_msgqueue_ref(ch);
1410 if (!(ch->flags & XPC_C_CONNECTED)) {
1411 xpc_msgqueue_deref(ch);
1415 /* see if we're really dealing with an ACK for a previously sent msg */
1416 if (msg->hdr.size == 0) {
1417 xpc_handle_notify_mq_ack_uv(ch, msg);
1418 xpc_msgqueue_deref(ch);
1422 /* we're dealing with a normal message sent via the notify_mq */
1425 msg_slot = ch_uv->recv_msg_slots +
1426 (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size;
1428 BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number);
1429 BUG_ON(msg_slot->hdr.size != 0);
1431 memcpy(msg_slot, msg, msg->hdr.size);
1433 xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);
1435 if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
1437 * If there is an existing idle kthread get it to deliver
1438 * the payload, otherwise we'll have to get the channel mgr
1439 * for this partition to create a kthread to do the delivery.
1441 if (atomic_read(&ch->kthreads_idle) > 0)
1442 wake_up_nr(&ch->idle_wq, 1);
1444 xpc_send_chctl_local_msgrequest_uv(part, ch->number);
1446 xpc_msgqueue_deref(ch);
1450 xpc_handle_notify_IRQ_uv(int irq, void *dev_id)
1452 struct xpc_notify_mq_msg_uv *msg;
1454 struct xpc_partition *part;
1456 while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) !=
1459 partid = msg->hdr.partid;
1460 if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
1461 dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received "
1462 "invalid partid=0x%x in message\n", partid);
1464 part = &xpc_partitions[partid];
1466 if (xpc_part_ref(part)) {
1467 xpc_handle_notify_mq_msg_uv(part, msg);
1468 xpc_part_deref(part);
1472 gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg);
1479 xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch)
1481 return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list);
1485 xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number)
1487 struct xpc_channel *ch = &part->channels[ch_number];
1488 int ndeliverable_payloads;
1490 xpc_msgqueue_ref(ch);
1492 ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch);
1494 if (ndeliverable_payloads > 0 &&
1495 (ch->flags & XPC_C_CONNECTED) &&
1496 (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) {
1498 xpc_activate_kthreads(ch, ndeliverable_payloads);
1501 xpc_msgqueue_deref(ch);
1504 static enum xp_retval
1505 xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload,
1506 u16 payload_size, u8 notify_type, xpc_notify_func func,
1509 enum xp_retval ret = xpSuccess;
1510 struct xpc_send_msg_slot_uv *msg_slot = NULL;
1511 struct xpc_notify_mq_msg_uv *msg;
1512 u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV];
1515 DBUG_ON(notify_type != XPC_N_CALL);
1517 msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size;
1518 if (msg_size > ch->entry_size)
1519 return xpPayloadTooBig;
1521 xpc_msgqueue_ref(ch);
1523 if (ch->flags & XPC_C_DISCONNECTING) {
1527 if (!(ch->flags & XPC_C_CONNECTED)) {
1528 ret = xpNotConnected;
1532 ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot);
1533 if (ret != xpSuccess)
1537 atomic_inc(&ch->n_to_notify);
1539 msg_slot->key = key;
1540 smp_wmb(); /* a non-NULL func must hit memory after the key */
1541 msg_slot->func = func;
1543 if (ch->flags & XPC_C_DISCONNECTING) {
1549 msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer;
1550 msg->hdr.partid = xp_partition_id;
1551 msg->hdr.ch_number = ch->number;
1552 msg->hdr.size = msg_size;
1553 msg->hdr.msg_slot_number = msg_slot->msg_slot_number;
1554 memcpy(&msg->payload, payload, payload_size);
1556 ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
1558 if (ret == xpSuccess)
1561 XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
1565 * Try to NULL the msg_slot's func field. If we fail, then
1566 * xpc_notify_senders_of_disconnect_uv() beat us to it, in which
1567 * case we need to pretend we succeeded to send the message
1568 * since the user will get a callout for the disconnect error
1569 * by xpc_notify_senders_of_disconnect_uv(), and to also get an
1570 * error returned here will confuse them. Additionally, since
1571 * in this case the channel is being disconnected we don't need
1572 * to put the the msg_slot back on the free list.
1574 if (cmpxchg(&msg_slot->func, func, NULL) != func) {
1579 msg_slot->key = NULL;
1580 atomic_dec(&ch->n_to_notify);
1582 xpc_free_msg_slot_uv(ch, msg_slot);
1584 xpc_msgqueue_deref(ch);
1589 * Tell the callers of xpc_send_notify() that the status of their payloads
1590 * is unknown because the channel is now disconnecting.
1592 * We don't worry about putting these msg_slots on the free list since the
1593 * msg_slots themselves are about to be kfree'd.
1596 xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch)
1598 struct xpc_send_msg_slot_uv *msg_slot;
1601 DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
1603 for (entry = 0; entry < ch->local_nentries; entry++) {
1605 if (atomic_read(&ch->n_to_notify) == 0)
1608 msg_slot = &ch->sn.uv.send_msg_slots[entry];
1609 if (msg_slot->func != NULL)
1610 xpc_notify_sender_uv(ch, msg_slot, ch->reason);
1615 * Get the next deliverable message's payload.
1618 xpc_get_deliverable_payload_uv(struct xpc_channel *ch)
1620 struct xpc_fifo_entry_uv *entry;
1621 struct xpc_notify_mq_msg_uv *msg;
1622 void *payload = NULL;
1624 if (!(ch->flags & XPC_C_DISCONNECTING)) {
1625 entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list);
1626 if (entry != NULL) {
1627 msg = container_of(entry, struct xpc_notify_mq_msg_uv,
1629 payload = &msg->payload;
1636 xpc_received_payload_uv(struct xpc_channel *ch, void *payload)
1638 struct xpc_notify_mq_msg_uv *msg;
1641 msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload);
1643 /* return an ACK to the sender of this message */
1645 msg->hdr.partid = xp_partition_id;
1646 msg->hdr.size = 0; /* size of zero indicates this is an ACK */
1648 ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
1649 sizeof(struct xpc_notify_mq_msghdr_uv));
1650 if (ret != xpSuccess)
1651 XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
1653 msg->hdr.msg_slot_number += ch->remote_nentries;
1656 static struct xpc_arch_operations xpc_arch_ops_uv = {
1657 .setup_partitions = xpc_setup_partitions_uv,
1658 .teardown_partitions = xpc_teardown_partitions_uv,
1659 .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv,
1660 .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv,
1661 .setup_rsvd_page = xpc_setup_rsvd_page_uv,
1663 .allow_hb = xpc_allow_hb_uv,
1664 .disallow_hb = xpc_disallow_hb_uv,
1665 .disallow_all_hbs = xpc_disallow_all_hbs_uv,
1666 .increment_heartbeat = xpc_increment_heartbeat_uv,
1667 .offline_heartbeat = xpc_offline_heartbeat_uv,
1668 .online_heartbeat = xpc_online_heartbeat_uv,
1669 .heartbeat_init = xpc_heartbeat_init_uv,
1670 .heartbeat_exit = xpc_heartbeat_exit_uv,
1671 .get_remote_heartbeat = xpc_get_remote_heartbeat_uv,
1673 .request_partition_activation =
1674 xpc_request_partition_activation_uv,
1675 .request_partition_reactivation =
1676 xpc_request_partition_reactivation_uv,
1677 .request_partition_deactivation =
1678 xpc_request_partition_deactivation_uv,
1679 .cancel_partition_deactivation_request =
1680 xpc_cancel_partition_deactivation_request_uv,
1682 .setup_ch_structures = xpc_setup_ch_structures_uv,
1683 .teardown_ch_structures = xpc_teardown_ch_structures_uv,
1685 .make_first_contact = xpc_make_first_contact_uv,
1687 .get_chctl_all_flags = xpc_get_chctl_all_flags_uv,
1688 .send_chctl_closerequest = xpc_send_chctl_closerequest_uv,
1689 .send_chctl_closereply = xpc_send_chctl_closereply_uv,
1690 .send_chctl_openrequest = xpc_send_chctl_openrequest_uv,
1691 .send_chctl_openreply = xpc_send_chctl_openreply_uv,
1692 .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv,
1693 .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv,
1695 .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv,
1697 .setup_msg_structures = xpc_setup_msg_structures_uv,
1698 .teardown_msg_structures = xpc_teardown_msg_structures_uv,
1700 .indicate_partition_engaged = xpc_indicate_partition_engaged_uv,
1701 .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv,
1702 .assume_partition_disengaged = xpc_assume_partition_disengaged_uv,
1703 .partition_engaged = xpc_partition_engaged_uv,
1704 .any_partition_engaged = xpc_any_partition_engaged_uv,
1706 .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv,
1707 .send_payload = xpc_send_payload_uv,
1708 .get_deliverable_payload = xpc_get_deliverable_payload_uv,
1709 .received_payload = xpc_received_payload_uv,
1710 .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv,
1716 xpc_arch_ops = xpc_arch_ops_uv;
1718 if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) {
1719 dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n",
1720 XPC_MSG_HDR_MAX_SIZE);
1724 xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0,
1725 XPC_ACTIVATE_IRQ_NAME,
1726 xpc_handle_activate_IRQ_uv);
1727 if (IS_ERR(xpc_activate_mq_uv))
1728 return PTR_ERR(xpc_activate_mq_uv);
1730 xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0,
1731 XPC_NOTIFY_IRQ_NAME,
1732 xpc_handle_notify_IRQ_uv);
1733 if (IS_ERR(xpc_notify_mq_uv)) {
1734 xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
1735 return PTR_ERR(xpc_notify_mq_uv);
1744 xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
1745 xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);