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_sn_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_sn_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);
111 dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
116 mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset);
118 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
119 if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
120 mq->irq = SGI_XPC_ACTIVATE;
121 else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
122 mq->irq = SGI_XPC_NOTIFY;
126 mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
127 uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value);
129 #error not a supported configuration
136 xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
138 #if defined CONFIG_X86_64
139 uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset);
141 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
143 unsigned long mmr_value;
145 mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
146 mmr_value = 1UL << 16;
148 uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
150 #error not a supported configuration
155 xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
159 #if defined CONFIG_X86_64
160 ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address),
161 mq->order, &mq->mmr_offset);
163 dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, "
167 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
168 ret = sn_mq_watchlist_alloc(mq->mmr_blade, (void *)uv_gpa(mq->address),
169 mq->order, &mq->mmr_offset);
171 dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n",
176 #error not a supported configuration
179 mq->watchlist_num = ret;
184 xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
188 #if defined CONFIG_X86_64
189 ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num);
190 BUG_ON(ret != BIOS_STATUS_SUCCESS);
191 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
192 ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num);
193 BUG_ON(ret != SALRET_OK);
195 #error not a supported configuration
199 static struct xpc_gru_mq_uv *
200 xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name,
201 irq_handler_t irq_handler)
203 enum xp_retval xp_ret;
208 struct xpc_gru_mq_uv *mq;
209 struct uv_IO_APIC_route_entry *mmr_value;
211 mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL);
213 dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
214 "a xpc_gru_mq_uv structure\n");
219 mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc),
221 if (mq->gru_mq_desc == NULL) {
222 dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
223 "a gru_message_queue_desc structure\n");
228 pg_order = get_order(mq_size);
229 mq->order = pg_order + PAGE_SHIFT;
230 mq_size = 1UL << mq->order;
232 mq->mmr_blade = uv_cpu_to_blade_id(cpu);
234 nid = cpu_to_node(cpu);
235 page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
238 dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
239 "bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
243 mq->address = page_address(page);
245 /* enable generation of irq when GRU mq operation occurs to this mq */
246 ret = xpc_gru_mq_watchlist_alloc_uv(mq);
250 ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name);
254 ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
256 dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
261 mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value;
262 ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size,
263 nid, mmr_value->vector, mmr_value->dest);
265 dev_err(xpc_part, "gru_create_message_queue() returned "
271 /* allow other partitions to access this GRU mq */
272 xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
273 if (xp_ret != xpSuccess) {
280 /* something went wrong */
282 free_irq(mq->irq, NULL);
284 xpc_release_gru_mq_irq_uv(mq);
286 xpc_gru_mq_watchlist_free_uv(mq);
288 free_pages((unsigned long)mq->address, pg_order);
290 kfree(mq->gru_mq_desc);
298 xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
300 unsigned int mq_size;
304 /* disallow other partitions to access GRU mq */
305 mq_size = 1UL << mq->order;
306 ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size);
307 BUG_ON(ret != xpSuccess);
309 /* unregister irq handler and release mq irq/vector mapping */
310 free_irq(mq->irq, NULL);
311 xpc_release_gru_mq_irq_uv(mq);
313 /* disable generation of irq when GRU mq op occurs to this mq */
314 xpc_gru_mq_watchlist_free_uv(mq);
316 pg_order = mq->order - PAGE_SHIFT;
317 free_pages((unsigned long)mq->address, pg_order);
322 static enum xp_retval
323 xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg,
326 enum xp_retval xp_ret;
330 ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size);
336 if (ret == MQE_QUEUE_FULL) {
337 dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
338 "error=MQE_QUEUE_FULL\n");
339 /* !!! handle QLimit reached; delay & try again */
340 /* ??? Do we add a limit to the number of retries? */
341 (void)msleep_interruptible(10);
342 } else if (ret == MQE_CONGESTION) {
343 dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
344 "error=MQE_CONGESTION\n");
345 /* !!! handle LB Overflow; simply try again */
346 /* ??? Do we add a limit to the number of retries? */
348 /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */
349 dev_err(xpc_chan, "gru_send_message_gpa() returned "
351 xp_ret = xpGruSendMqError;
359 xpc_process_activate_IRQ_rcvd_uv(void)
361 unsigned long irq_flags;
363 struct xpc_partition *part;
366 DBUG_ON(xpc_activate_IRQ_rcvd == 0);
368 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
369 for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
370 part = &xpc_partitions[partid];
372 if (part->sn.uv.act_state_req == 0)
375 xpc_activate_IRQ_rcvd--;
376 BUG_ON(xpc_activate_IRQ_rcvd < 0);
378 act_state_req = part->sn.uv.act_state_req;
379 part->sn.uv.act_state_req = 0;
380 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
382 if (act_state_req == XPC_P_ASR_ACTIVATE_UV) {
383 if (part->act_state == XPC_P_AS_INACTIVE)
384 xpc_activate_partition(part);
385 else if (part->act_state == XPC_P_AS_DEACTIVATING)
386 XPC_DEACTIVATE_PARTITION(part, xpReactivating);
388 } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) {
389 if (part->act_state == XPC_P_AS_INACTIVE)
390 xpc_activate_partition(part);
392 XPC_DEACTIVATE_PARTITION(part, xpReactivating);
394 } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) {
395 XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason);
401 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
402 if (xpc_activate_IRQ_rcvd == 0)
405 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
410 xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
411 struct xpc_activate_mq_msghdr_uv *msg_hdr,
412 int *wakeup_hb_checker)
414 unsigned long irq_flags;
415 struct xpc_partition_uv *part_uv = &part->sn.uv;
416 struct xpc_openclose_args *args;
418 part_uv->remote_act_state = msg_hdr->act_state;
420 switch (msg_hdr->type) {
421 case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
422 /* syncing of remote_act_state was just done above */
425 case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
426 struct xpc_activate_mq_msg_activate_req_uv *msg;
429 * ??? Do we deal here with ts_jiffies being different
430 * ??? if act_state != XPC_P_AS_INACTIVE instead of
433 msg = container_of(msg_hdr, struct
434 xpc_activate_mq_msg_activate_req_uv, hdr);
436 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
437 if (part_uv->act_state_req == 0)
438 xpc_activate_IRQ_rcvd++;
439 part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
440 part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
441 part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
442 part_uv->heartbeat_gpa = msg->heartbeat_gpa;
444 if (msg->activate_gru_mq_desc_gpa !=
445 part_uv->activate_gru_mq_desc_gpa) {
446 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
447 part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
448 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
449 part_uv->activate_gru_mq_desc_gpa =
450 msg->activate_gru_mq_desc_gpa;
452 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
454 (*wakeup_hb_checker)++;
457 case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
458 struct xpc_activate_mq_msg_deactivate_req_uv *msg;
460 msg = container_of(msg_hdr, struct
461 xpc_activate_mq_msg_deactivate_req_uv, hdr);
463 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
464 if (part_uv->act_state_req == 0)
465 xpc_activate_IRQ_rcvd++;
466 part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
467 part_uv->reason = msg->reason;
468 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
470 (*wakeup_hb_checker)++;
473 case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
474 struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
476 msg = container_of(msg_hdr, struct
477 xpc_activate_mq_msg_chctl_closerequest_uv,
479 args = &part->remote_openclose_args[msg->ch_number];
480 args->reason = msg->reason;
482 spin_lock_irqsave(&part->chctl_lock, irq_flags);
483 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
484 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
486 xpc_wakeup_channel_mgr(part);
489 case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
490 struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
492 msg = container_of(msg_hdr, struct
493 xpc_activate_mq_msg_chctl_closereply_uv,
496 spin_lock_irqsave(&part->chctl_lock, irq_flags);
497 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
498 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
500 xpc_wakeup_channel_mgr(part);
503 case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
504 struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
506 msg = container_of(msg_hdr, struct
507 xpc_activate_mq_msg_chctl_openrequest_uv,
509 args = &part->remote_openclose_args[msg->ch_number];
510 args->entry_size = msg->entry_size;
511 args->local_nentries = msg->local_nentries;
513 spin_lock_irqsave(&part->chctl_lock, irq_flags);
514 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
515 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
517 xpc_wakeup_channel_mgr(part);
520 case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
521 struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
523 msg = container_of(msg_hdr, struct
524 xpc_activate_mq_msg_chctl_openreply_uv, hdr);
525 args = &part->remote_openclose_args[msg->ch_number];
526 args->remote_nentries = msg->remote_nentries;
527 args->local_nentries = msg->local_nentries;
528 args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
530 spin_lock_irqsave(&part->chctl_lock, irq_flags);
531 part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
532 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
534 xpc_wakeup_channel_mgr(part);
537 case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
538 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
539 part_uv->flags |= XPC_P_ENGAGED_UV;
540 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
543 case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
544 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
545 part_uv->flags &= ~XPC_P_ENGAGED_UV;
546 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
550 dev_err(xpc_part, "received unknown activate_mq msg type=%d "
551 "from partition=%d\n", msg_hdr->type, XPC_PARTID(part));
553 /* get hb checker to deactivate from the remote partition */
554 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
555 if (part_uv->act_state_req == 0)
556 xpc_activate_IRQ_rcvd++;
557 part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
558 part_uv->reason = xpBadMsgType;
559 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
561 (*wakeup_hb_checker)++;
565 if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
566 part->remote_rp_ts_jiffies != 0) {
568 * ??? Does what we do here need to be sensitive to
569 * ??? act_state or remote_act_state?
571 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
572 if (part_uv->act_state_req == 0)
573 xpc_activate_IRQ_rcvd++;
574 part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
575 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
577 (*wakeup_hb_checker)++;
582 xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
584 struct xpc_activate_mq_msghdr_uv *msg_hdr;
586 struct xpc_partition *part;
587 int wakeup_hb_checker = 0;
591 msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc);
595 partid = msg_hdr->partid;
596 if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
597 dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() "
598 "received invalid partid=0x%x in message\n",
601 part = &xpc_partitions[partid];
603 part_referenced = xpc_part_ref(part);
604 xpc_handle_activate_mq_msg_uv(part, msg_hdr,
607 xpc_part_deref(part);
610 gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr);
613 if (wakeup_hb_checker)
614 wake_up_interruptible(&xpc_activate_IRQ_wq);
619 static enum xp_retval
620 xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc,
621 unsigned long gru_mq_desc_gpa)
625 ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa,
626 sizeof(struct gru_message_queue_desc));
627 if (ret == xpSuccess)
628 gru_mq_desc->mq = NULL;
633 static enum xp_retval
634 xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
637 struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
638 struct xpc_partition_uv *part_uv = &part->sn.uv;
639 struct gru_message_queue_desc *gru_mq_desc;
640 unsigned long irq_flags;
643 DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
645 msg_hdr->type = msg_type;
646 msg_hdr->partid = xp_partition_id;
647 msg_hdr->act_state = part->act_state;
648 msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
650 mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
652 if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) {
653 gru_mq_desc = part_uv->cached_activate_gru_mq_desc;
654 if (gru_mq_desc == NULL) {
655 gru_mq_desc = kmalloc(sizeof(struct
656 gru_message_queue_desc),
658 if (gru_mq_desc == NULL) {
662 part_uv->cached_activate_gru_mq_desc = gru_mq_desc;
665 ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc,
667 activate_gru_mq_desc_gpa);
668 if (ret != xpSuccess)
671 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
672 part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
673 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
676 /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
677 ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg,
679 if (ret != xpSuccess) {
680 smp_rmb(); /* ensure a fresh copy of part_uv->flags */
681 if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV))
685 mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex);
690 xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg,
691 size_t msg_size, int msg_type)
695 ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
696 if (unlikely(ret != xpSuccess))
697 XPC_DEACTIVATE_PARTITION(part, ret);
701 xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
702 void *msg, size_t msg_size, int msg_type)
704 struct xpc_partition *part = &xpc_partitions[ch->partid];
707 ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
708 if (unlikely(ret != xpSuccess)) {
709 if (irq_flags != NULL)
710 spin_unlock_irqrestore(&ch->lock, *irq_flags);
712 XPC_DEACTIVATE_PARTITION(part, ret);
714 if (irq_flags != NULL)
715 spin_lock_irqsave(&ch->lock, *irq_flags);
720 xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req)
722 unsigned long irq_flags;
723 struct xpc_partition_uv *part_uv = &part->sn.uv;
726 * !!! Make our side think that the remote partition sent an activate
727 * !!! mq message our way by doing what the activate IRQ handler would
728 * !!! do had one really been sent.
731 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
732 if (part_uv->act_state_req == 0)
733 xpc_activate_IRQ_rcvd++;
734 part_uv->act_state_req = act_state_req;
735 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
737 wake_up_interruptible(&xpc_activate_IRQ_wq);
740 static enum xp_retval
741 xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
747 #if defined CONFIG_X86_64
748 status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa,
750 if (status == BIOS_STATUS_SUCCESS)
752 else if (status == BIOS_STATUS_MORE_PASSES)
753 ret = xpNeedMoreInfo;
757 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
758 status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
759 if (status == SALRET_OK)
761 else if (status == SALRET_MORE_PASSES)
762 ret = xpNeedMoreInfo;
767 #error not a supported configuration
774 xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp)
777 &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat;
778 rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv);
779 rp->sn.uv.activate_gru_mq_desc_gpa =
780 uv_gpa(xpc_activate_mq_uv->gru_mq_desc);
785 xpc_allow_hb_uv(short partid)
790 xpc_disallow_hb_uv(short partid)
795 xpc_disallow_all_hbs_uv(void)
800 xpc_increment_heartbeat_uv(void)
802 xpc_heartbeat_uv->value++;
806 xpc_offline_heartbeat_uv(void)
808 xpc_increment_heartbeat_uv();
809 xpc_heartbeat_uv->offline = 1;
813 xpc_online_heartbeat_uv(void)
815 xpc_increment_heartbeat_uv();
816 xpc_heartbeat_uv->offline = 0;
820 xpc_heartbeat_init_uv(void)
822 xpc_heartbeat_uv->value = 1;
823 xpc_heartbeat_uv->offline = 0;
827 xpc_heartbeat_exit_uv(void)
829 xpc_offline_heartbeat_uv();
832 static enum xp_retval
833 xpc_get_remote_heartbeat_uv(struct xpc_partition *part)
835 struct xpc_partition_uv *part_uv = &part->sn.uv;
838 ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat),
839 part_uv->heartbeat_gpa,
840 sizeof(struct xpc_heartbeat_uv));
841 if (ret != xpSuccess)
844 if (part_uv->cached_heartbeat.value == part->last_heartbeat &&
845 !part_uv->cached_heartbeat.offline) {
849 part->last_heartbeat = part_uv->cached_heartbeat.value;
855 xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
856 unsigned long remote_rp_gpa, int nasid)
858 short partid = remote_rp->SAL_partid;
859 struct xpc_partition *part = &xpc_partitions[partid];
860 struct xpc_activate_mq_msg_activate_req_uv msg;
862 part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
863 part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
864 part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa;
865 part->sn.uv.activate_gru_mq_desc_gpa =
866 remote_rp->sn.uv.activate_gru_mq_desc_gpa;
869 * ??? Is it a good idea to make this conditional on what is
870 * ??? potentially stale state information?
872 if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
873 msg.rp_gpa = uv_gpa(xpc_rsvd_page);
874 msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa;
875 msg.activate_gru_mq_desc_gpa =
876 xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa;
877 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
878 XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
881 if (part->act_state == XPC_P_AS_INACTIVE)
882 xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
886 xpc_request_partition_reactivation_uv(struct xpc_partition *part)
888 xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
892 xpc_request_partition_deactivation_uv(struct xpc_partition *part)
894 struct xpc_activate_mq_msg_deactivate_req_uv msg;
897 * ??? Is it a good idea to make this conditional on what is
898 * ??? potentially stale state information?
900 if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING &&
901 part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) {
903 msg.reason = part->reason;
904 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
905 XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV);
910 xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part)
912 /* nothing needs to be done */
917 xpc_init_fifo_uv(struct xpc_fifo_head_uv *head)
921 spin_lock_init(&head->lock);
926 xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head)
928 unsigned long irq_flags;
929 struct xpc_fifo_entry_uv *first;
931 spin_lock_irqsave(&head->lock, irq_flags);
933 if (head->first != NULL) {
934 head->first = first->next;
935 if (head->first == NULL)
939 BUG_ON(head->n_entries < 0);
940 spin_unlock_irqrestore(&head->lock, irq_flags);
946 xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head,
947 struct xpc_fifo_entry_uv *last)
949 unsigned long irq_flags;
952 spin_lock_irqsave(&head->lock, irq_flags);
953 if (head->last != NULL)
954 head->last->next = last;
959 spin_unlock_irqrestore(&head->lock, irq_flags);
963 xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head)
965 return head->n_entries;
969 * Setup the channel structures that are uv specific.
971 static enum xp_retval
972 xpc_setup_ch_structures_sn_uv(struct xpc_partition *part)
974 struct xpc_channel_uv *ch_uv;
977 for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
978 ch_uv = &part->channels[ch_number].sn.uv;
980 xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
981 xpc_init_fifo_uv(&ch_uv->recv_msg_list);
988 * Teardown the channel structures that are uv specific.
991 xpc_teardown_ch_structures_sn_uv(struct xpc_partition *part)
993 /* nothing needs to be done */
997 static enum xp_retval
998 xpc_make_first_contact_uv(struct xpc_partition *part)
1000 struct xpc_activate_mq_msg_uv msg;
1003 * We send a sync msg to get the remote partition's remote_act_state
1004 * updated to our current act_state which at this point should
1005 * be XPC_P_AS_ACTIVATING.
1007 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1008 XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV);
1010 while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) {
1012 dev_dbg(xpc_part, "waiting to make first contact with "
1013 "partition %d\n", XPC_PARTID(part));
1015 /* wait a 1/4 of a second or so */
1016 (void)msleep_interruptible(250);
1018 if (part->act_state == XPC_P_AS_DEACTIVATING)
1019 return part->reason;
1026 xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
1028 unsigned long irq_flags;
1029 union xpc_channel_ctl_flags chctl;
1031 spin_lock_irqsave(&part->chctl_lock, irq_flags);
1032 chctl = part->chctl;
1033 if (chctl.all_flags != 0)
1034 part->chctl.all_flags = 0;
1036 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
1037 return chctl.all_flags;
1040 static enum xp_retval
1041 xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch)
1043 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1044 struct xpc_send_msg_slot_uv *msg_slot;
1045 unsigned long irq_flags;
1050 for (nentries = ch->local_nentries; nentries > 0; nentries--) {
1051 nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv);
1052 ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL);
1053 if (ch_uv->send_msg_slots == NULL)
1056 for (entry = 0; entry < nentries; entry++) {
1057 msg_slot = &ch_uv->send_msg_slots[entry];
1059 msg_slot->msg_slot_number = entry;
1060 xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list,
1064 spin_lock_irqsave(&ch->lock, irq_flags);
1065 if (nentries < ch->local_nentries)
1066 ch->local_nentries = nentries;
1067 spin_unlock_irqrestore(&ch->lock, irq_flags);
1074 static enum xp_retval
1075 xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch)
1077 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1078 struct xpc_notify_mq_msg_uv *msg_slot;
1079 unsigned long irq_flags;
1084 for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
1085 nbytes = nentries * ch->entry_size;
1086 ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL);
1087 if (ch_uv->recv_msg_slots == NULL)
1090 for (entry = 0; entry < nentries; entry++) {
1091 msg_slot = ch_uv->recv_msg_slots +
1092 entry * ch->entry_size;
1094 msg_slot->hdr.msg_slot_number = entry;
1097 spin_lock_irqsave(&ch->lock, irq_flags);
1098 if (nentries < ch->remote_nentries)
1099 ch->remote_nentries = nentries;
1100 spin_unlock_irqrestore(&ch->lock, irq_flags);
1108 * Allocate msg_slots associated with the channel.
1110 static enum xp_retval
1111 xpc_setup_msg_structures_uv(struct xpc_channel *ch)
1113 static enum xp_retval ret;
1114 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1116 DBUG_ON(ch->flags & XPC_C_SETUP);
1118 ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct
1119 gru_message_queue_desc),
1121 if (ch_uv->cached_notify_gru_mq_desc == NULL)
1124 ret = xpc_allocate_send_msg_slot_uv(ch);
1125 if (ret == xpSuccess) {
1127 ret = xpc_allocate_recv_msg_slot_uv(ch);
1128 if (ret != xpSuccess) {
1129 kfree(ch_uv->send_msg_slots);
1130 xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1137 * Free up msg_slots and clear other stuff that were setup for the specified
1141 xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
1143 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1145 DBUG_ON(!spin_is_locked(&ch->lock));
1147 kfree(ch_uv->cached_notify_gru_mq_desc);
1148 ch_uv->cached_notify_gru_mq_desc = NULL;
1150 if (ch->flags & XPC_C_SETUP) {
1151 xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1152 kfree(ch_uv->send_msg_slots);
1153 xpc_init_fifo_uv(&ch_uv->recv_msg_list);
1154 kfree(ch_uv->recv_msg_slots);
1159 xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1161 struct xpc_activate_mq_msg_chctl_closerequest_uv msg;
1163 msg.ch_number = ch->number;
1164 msg.reason = ch->reason;
1165 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1166 XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV);
1170 xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1172 struct xpc_activate_mq_msg_chctl_closereply_uv msg;
1174 msg.ch_number = ch->number;
1175 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1176 XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV);
1180 xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1182 struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
1184 msg.ch_number = ch->number;
1185 msg.entry_size = ch->entry_size;
1186 msg.local_nentries = ch->local_nentries;
1187 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1188 XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV);
1192 xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1194 struct xpc_activate_mq_msg_chctl_openreply_uv msg;
1196 msg.ch_number = ch->number;
1197 msg.local_nentries = ch->local_nentries;
1198 msg.remote_nentries = ch->remote_nentries;
1199 msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc);
1200 xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1201 XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
1205 xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number)
1207 unsigned long irq_flags;
1209 spin_lock_irqsave(&part->chctl_lock, irq_flags);
1210 part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST;
1211 spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
1213 xpc_wakeup_channel_mgr(part);
1216 static enum xp_retval
1217 xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
1218 unsigned long gru_mq_desc_gpa)
1220 struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1222 DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL);
1223 return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc,
1228 xpc_indicate_partition_engaged_uv(struct xpc_partition *part)
1230 struct xpc_activate_mq_msg_uv msg;
1232 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1233 XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV);
1237 xpc_indicate_partition_disengaged_uv(struct xpc_partition *part)
1239 struct xpc_activate_mq_msg_uv msg;
1241 xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1242 XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV);
1246 xpc_assume_partition_disengaged_uv(short partid)
1248 struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv;
1249 unsigned long irq_flags;
1251 spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
1252 part_uv->flags &= ~XPC_P_ENGAGED_UV;
1253 spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
1257 xpc_partition_engaged_uv(short partid)
1259 return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
1263 xpc_any_partition_engaged_uv(void)
1265 struct xpc_partition_uv *part_uv;
1268 for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
1269 part_uv = &xpc_partitions[partid].sn.uv;
1270 if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
1276 static enum xp_retval
1277 xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags,
1278 struct xpc_send_msg_slot_uv **address_of_msg_slot)
1281 struct xpc_send_msg_slot_uv *msg_slot;
1282 struct xpc_fifo_entry_uv *entry;
1285 entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list);
1289 if (flags & XPC_NOWAIT)
1292 ret = xpc_allocate_msg_wait(ch);
1293 if (ret != xpInterrupted && ret != xpTimeout)
1297 msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next);
1298 *address_of_msg_slot = msg_slot;
1303 xpc_free_msg_slot_uv(struct xpc_channel *ch,
1304 struct xpc_send_msg_slot_uv *msg_slot)
1306 xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next);
1308 /* wakeup anyone waiting for a free msg slot */
1309 if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
1310 wake_up(&ch->msg_allocate_wq);
1314 xpc_notify_sender_uv(struct xpc_channel *ch,
1315 struct xpc_send_msg_slot_uv *msg_slot,
1316 enum xp_retval reason)
1318 xpc_notify_func func = msg_slot->func;
1320 if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) {
1322 atomic_dec(&ch->n_to_notify);
1324 dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p "
1325 "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
1326 msg_slot->msg_slot_number, ch->partid, ch->number);
1328 func(reason, ch->partid, ch->number, msg_slot->key);
1330 dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p "
1331 "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
1332 msg_slot->msg_slot_number, ch->partid, ch->number);
1337 xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch,
1338 struct xpc_notify_mq_msg_uv *msg)
1340 struct xpc_send_msg_slot_uv *msg_slot;
1341 int entry = msg->hdr.msg_slot_number % ch->local_nentries;
1343 msg_slot = &ch->sn.uv.send_msg_slots[entry];
1345 BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number);
1346 msg_slot->msg_slot_number += ch->local_nentries;
1348 if (msg_slot->func != NULL)
1349 xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered);
1351 xpc_free_msg_slot_uv(ch, msg_slot);
1355 xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
1356 struct xpc_notify_mq_msg_uv *msg)
1358 struct xpc_partition_uv *part_uv = &part->sn.uv;
1359 struct xpc_channel *ch;
1360 struct xpc_channel_uv *ch_uv;
1361 struct xpc_notify_mq_msg_uv *msg_slot;
1362 unsigned long irq_flags;
1363 int ch_number = msg->hdr.ch_number;
1365 if (unlikely(ch_number >= part->nchannels)) {
1366 dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
1367 "channel number=0x%x in message from partid=%d\n",
1368 ch_number, XPC_PARTID(part));
1370 /* get hb checker to deactivate from the remote partition */
1371 spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
1372 if (part_uv->act_state_req == 0)
1373 xpc_activate_IRQ_rcvd++;
1374 part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
1375 part_uv->reason = xpBadChannelNumber;
1376 spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
1378 wake_up_interruptible(&xpc_activate_IRQ_wq);
1382 ch = &part->channels[ch_number];
1383 xpc_msgqueue_ref(ch);
1385 if (!(ch->flags & XPC_C_CONNECTED)) {
1386 xpc_msgqueue_deref(ch);
1390 /* see if we're really dealing with an ACK for a previously sent msg */
1391 if (msg->hdr.size == 0) {
1392 xpc_handle_notify_mq_ack_uv(ch, msg);
1393 xpc_msgqueue_deref(ch);
1397 /* we're dealing with a normal message sent via the notify_mq */
1400 msg_slot = ch_uv->recv_msg_slots +
1401 (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size;
1403 BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number);
1404 BUG_ON(msg_slot->hdr.size != 0);
1406 memcpy(msg_slot, msg, msg->hdr.size);
1408 xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);
1410 if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
1412 * If there is an existing idle kthread get it to deliver
1413 * the payload, otherwise we'll have to get the channel mgr
1414 * for this partition to create a kthread to do the delivery.
1416 if (atomic_read(&ch->kthreads_idle) > 0)
1417 wake_up_nr(&ch->idle_wq, 1);
1419 xpc_send_chctl_local_msgrequest_uv(part, ch->number);
1421 xpc_msgqueue_deref(ch);
1425 xpc_handle_notify_IRQ_uv(int irq, void *dev_id)
1427 struct xpc_notify_mq_msg_uv *msg;
1429 struct xpc_partition *part;
1431 while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) !=
1434 partid = msg->hdr.partid;
1435 if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
1436 dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received "
1437 "invalid partid=0x%x in message\n", partid);
1439 part = &xpc_partitions[partid];
1441 if (xpc_part_ref(part)) {
1442 xpc_handle_notify_mq_msg_uv(part, msg);
1443 xpc_part_deref(part);
1447 gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg);
1454 xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch)
1456 return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list);
1460 xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number)
1462 struct xpc_channel *ch = &part->channels[ch_number];
1463 int ndeliverable_payloads;
1465 xpc_msgqueue_ref(ch);
1467 ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch);
1469 if (ndeliverable_payloads > 0 &&
1470 (ch->flags & XPC_C_CONNECTED) &&
1471 (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) {
1473 xpc_activate_kthreads(ch, ndeliverable_payloads);
1476 xpc_msgqueue_deref(ch);
1479 static enum xp_retval
1480 xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload,
1481 u16 payload_size, u8 notify_type, xpc_notify_func func,
1484 enum xp_retval ret = xpSuccess;
1485 struct xpc_send_msg_slot_uv *msg_slot = NULL;
1486 struct xpc_notify_mq_msg_uv *msg;
1487 u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV];
1490 DBUG_ON(notify_type != XPC_N_CALL);
1492 msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size;
1493 if (msg_size > ch->entry_size)
1494 return xpPayloadTooBig;
1496 xpc_msgqueue_ref(ch);
1498 if (ch->flags & XPC_C_DISCONNECTING) {
1502 if (!(ch->flags & XPC_C_CONNECTED)) {
1503 ret = xpNotConnected;
1507 ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot);
1508 if (ret != xpSuccess)
1512 atomic_inc(&ch->n_to_notify);
1514 msg_slot->key = key;
1515 smp_wmb(); /* a non-NULL func must hit memory after the key */
1516 msg_slot->func = func;
1518 if (ch->flags & XPC_C_DISCONNECTING) {
1524 msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer;
1525 msg->hdr.partid = xp_partition_id;
1526 msg->hdr.ch_number = ch->number;
1527 msg->hdr.size = msg_size;
1528 msg->hdr.msg_slot_number = msg_slot->msg_slot_number;
1529 memcpy(&msg->payload, payload, payload_size);
1531 ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
1533 if (ret == xpSuccess)
1536 XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
1540 * Try to NULL the msg_slot's func field. If we fail, then
1541 * xpc_notify_senders_of_disconnect_uv() beat us to it, in which
1542 * case we need to pretend we succeeded to send the message
1543 * since the user will get a callout for the disconnect error
1544 * by xpc_notify_senders_of_disconnect_uv(), and to also get an
1545 * error returned here will confuse them. Additionally, since
1546 * in this case the channel is being disconnected we don't need
1547 * to put the the msg_slot back on the free list.
1549 if (cmpxchg(&msg_slot->func, func, NULL) != func) {
1554 msg_slot->key = NULL;
1555 atomic_dec(&ch->n_to_notify);
1557 xpc_free_msg_slot_uv(ch, msg_slot);
1559 xpc_msgqueue_deref(ch);
1564 * Tell the callers of xpc_send_notify() that the status of their payloads
1565 * is unknown because the channel is now disconnecting.
1567 * We don't worry about putting these msg_slots on the free list since the
1568 * msg_slots themselves are about to be kfree'd.
1571 xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch)
1573 struct xpc_send_msg_slot_uv *msg_slot;
1576 DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
1578 for (entry = 0; entry < ch->local_nentries; entry++) {
1580 if (atomic_read(&ch->n_to_notify) == 0)
1583 msg_slot = &ch->sn.uv.send_msg_slots[entry];
1584 if (msg_slot->func != NULL)
1585 xpc_notify_sender_uv(ch, msg_slot, ch->reason);
1590 * Get the next deliverable message's payload.
1593 xpc_get_deliverable_payload_uv(struct xpc_channel *ch)
1595 struct xpc_fifo_entry_uv *entry;
1596 struct xpc_notify_mq_msg_uv *msg;
1597 void *payload = NULL;
1599 if (!(ch->flags & XPC_C_DISCONNECTING)) {
1600 entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list);
1601 if (entry != NULL) {
1602 msg = container_of(entry, struct xpc_notify_mq_msg_uv,
1604 payload = &msg->payload;
1611 xpc_received_payload_uv(struct xpc_channel *ch, void *payload)
1613 struct xpc_notify_mq_msg_uv *msg;
1616 msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload);
1618 /* return an ACK to the sender of this message */
1620 msg->hdr.partid = xp_partition_id;
1621 msg->hdr.size = 0; /* size of zero indicates this is an ACK */
1623 ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
1624 sizeof(struct xpc_notify_mq_msghdr_uv));
1625 if (ret != xpSuccess)
1626 XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
1628 msg->hdr.msg_slot_number += ch->remote_nentries;
1634 xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv;
1635 xpc_teardown_partitions_sn = xpc_teardown_partitions_sn_uv;
1636 xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv;
1637 xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv;
1638 xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv;
1640 xpc_allow_hb = xpc_allow_hb_uv;
1641 xpc_disallow_hb = xpc_disallow_hb_uv;
1642 xpc_disallow_all_hbs = xpc_disallow_all_hbs_uv;
1643 xpc_increment_heartbeat = xpc_increment_heartbeat_uv;
1644 xpc_offline_heartbeat = xpc_offline_heartbeat_uv;
1645 xpc_online_heartbeat = xpc_online_heartbeat_uv;
1646 xpc_heartbeat_init = xpc_heartbeat_init_uv;
1647 xpc_heartbeat_exit = xpc_heartbeat_exit_uv;
1648 xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_uv;
1650 xpc_request_partition_activation = xpc_request_partition_activation_uv;
1651 xpc_request_partition_reactivation =
1652 xpc_request_partition_reactivation_uv;
1653 xpc_request_partition_deactivation =
1654 xpc_request_partition_deactivation_uv;
1655 xpc_cancel_partition_deactivation_request =
1656 xpc_cancel_partition_deactivation_request_uv;
1658 xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_uv;
1659 xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_uv;
1661 xpc_make_first_contact = xpc_make_first_contact_uv;
1663 xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv;
1664 xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_uv;
1665 xpc_send_chctl_closereply = xpc_send_chctl_closereply_uv;
1666 xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_uv;
1667 xpc_send_chctl_openreply = xpc_send_chctl_openreply_uv;
1669 xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv;
1671 xpc_setup_msg_structures = xpc_setup_msg_structures_uv;
1672 xpc_teardown_msg_structures = xpc_teardown_msg_structures_uv;
1674 xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_uv;
1675 xpc_indicate_partition_disengaged =
1676 xpc_indicate_partition_disengaged_uv;
1677 xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_uv;
1678 xpc_partition_engaged = xpc_partition_engaged_uv;
1679 xpc_any_partition_engaged = xpc_any_partition_engaged_uv;
1681 xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv;
1682 xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv;
1683 xpc_send_payload = xpc_send_payload_uv;
1684 xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv;
1685 xpc_get_deliverable_payload = xpc_get_deliverable_payload_uv;
1686 xpc_received_payload = xpc_received_payload_uv;
1688 if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) {
1689 dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n",
1690 XPC_MSG_HDR_MAX_SIZE);
1694 xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0,
1695 XPC_ACTIVATE_IRQ_NAME,
1696 xpc_handle_activate_IRQ_uv);
1697 if (IS_ERR(xpc_activate_mq_uv))
1698 return PTR_ERR(xpc_activate_mq_uv);
1700 xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0,
1701 XPC_NOTIFY_IRQ_NAME,
1702 xpc_handle_notify_IRQ_uv);
1703 if (IS_ERR(xpc_notify_mq_uv)) {
1704 xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
1705 return PTR_ERR(xpc_notify_mq_uv);
1714 xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
1715 xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);