1/*
   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
   4 * for more details.
   5 *
   6 * Copyright (c) 2008-2009 Silicon Graphics, Inc.  All Rights Reserved.
   7 */
   8
   9/*
  10 * Cross Partition Communication (XPC) uv-based functions.
  11 *
  12 *     Architecture specific implementation of common functions.
  13 *
  14 */
  15
  16#include <linux/kernel.h>
  17#include <linux/mm.h>
  18#include <linux/interrupt.h>
  19#include <linux/delay.h>
  20#include <linux/device.h>
 
 
  21#include <linux/err.h>
  22#include <linux/slab.h>
  23#include <asm/uv/uv_hub.h>
  24#if defined CONFIG_X86_64
  25#include <asm/uv/bios.h>
  26#include <asm/uv/uv_irq.h>
  27#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
  28#include <asm/sn/intr.h>
  29#include <asm/sn/sn_sal.h>
  30#endif
  31#include "../sgi-gru/gru.h"
  32#include "../sgi-gru/grukservices.h"
  33#include "xpc.h"
  34
  35#if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
  36struct uv_IO_APIC_route_entry {
  37	__u64	vector		:  8,
  38		delivery_mode	:  3,
  39		dest_mode	:  1,
  40		delivery_status	:  1,
  41		polarity	:  1,
  42		__reserved_1	:  1,
  43		trigger		:  1,
  44		mask		:  1,
  45		__reserved_2	: 15,
  46		dest		: 32;
  47};
  48#endif
  49
  50static struct xpc_heartbeat_uv *xpc_heartbeat_uv;
  51
  52#define XPC_ACTIVATE_MSG_SIZE_UV	(1 * GRU_CACHE_LINE_BYTES)
  53#define XPC_ACTIVATE_MQ_SIZE_UV		(4 * XP_MAX_NPARTITIONS_UV * \
  54					 XPC_ACTIVATE_MSG_SIZE_UV)
  55#define XPC_ACTIVATE_IRQ_NAME		"xpc_activate"
  56
  57#define XPC_NOTIFY_MSG_SIZE_UV		(2 * GRU_CACHE_LINE_BYTES)
  58#define XPC_NOTIFY_MQ_SIZE_UV		(4 * XP_MAX_NPARTITIONS_UV * \
  59					 XPC_NOTIFY_MSG_SIZE_UV)
  60#define XPC_NOTIFY_IRQ_NAME		"xpc_notify"
  61
 
 
  62static struct xpc_gru_mq_uv *xpc_activate_mq_uv;
  63static struct xpc_gru_mq_uv *xpc_notify_mq_uv;
  64
  65static int
  66xpc_setup_partitions_uv(void)
  67{
  68	short partid;
  69	struct xpc_partition_uv *part_uv;
  70
  71	for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
  72		part_uv = &xpc_partitions[partid].sn.uv;
  73
  74		mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex);
  75		spin_lock_init(&part_uv->flags_lock);
  76		part_uv->remote_act_state = XPC_P_AS_INACTIVE;
  77	}
  78	return 0;
  79}
  80
  81static void
  82xpc_teardown_partitions_uv(void)
  83{
  84	short partid;
  85	struct xpc_partition_uv *part_uv;
  86	unsigned long irq_flags;
  87
  88	for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
  89		part_uv = &xpc_partitions[partid].sn.uv;
  90
  91		if (part_uv->cached_activate_gru_mq_desc != NULL) {
  92			mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
  93			spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
  94			part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
  95			spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
  96			kfree(part_uv->cached_activate_gru_mq_desc);
  97			part_uv->cached_activate_gru_mq_desc = NULL;
  98			mutex_unlock(&part_uv->
  99				     cached_activate_gru_mq_desc_mutex);
 100		}
 101	}
 102}
 103
 104static int
 105xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
 106{
 107	int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
 108
 109#if defined CONFIG_X86_64
 110	mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset,
 111			UV_AFFINITY_CPU);
 112	if (mq->irq < 0) {
 113		dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
 114			-mq->irq);
 115		return mq->irq;
 116	}
 117
 118	mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset);
 119
 120#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
 121	if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
 122		mq->irq = SGI_XPC_ACTIVATE;
 123	else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
 124		mq->irq = SGI_XPC_NOTIFY;
 125	else
 126		return -EINVAL;
 127
 128	mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
 129	uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value);
 130#else
 131	#error not a supported configuration
 132#endif
 133
 134	return 0;
 135}
 136
 137static void
 138xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
 139{
 140#if defined CONFIG_X86_64
 141	uv_teardown_irq(mq->irq);
 142
 143#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
 144	int mmr_pnode;
 145	unsigned long mmr_value;
 146
 147	mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
 148	mmr_value = 1UL << 16;
 149
 150	uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
 151#else
 152	#error not a supported configuration
 153#endif
 154}
 155
 156static int
 157xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
 158{
 159	int ret;
 160
 161#if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
 162	int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
 163
 164	ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address),
 165				    mq->order, &mq->mmr_offset);
 166	if (ret < 0) {
 167		dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n",
 168			ret);
 169		return -EBUSY;
 170	}
 171#elif defined CONFIG_X86_64
 172	ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address),
 173					 mq->order, &mq->mmr_offset);
 174	if (ret < 0) {
 175		dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, "
 176			"ret=%d\n", ret);
 177		return ret;
 178	}
 179#else
 180	#error not a supported configuration
 181#endif
 182
 183	mq->watchlist_num = ret;
 184	return 0;
 185}
 186
 187static void
 188xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
 189{
 190	int ret;
 191	int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
 192
 193#if defined CONFIG_X86_64
 194	ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
 195	BUG_ON(ret != BIOS_STATUS_SUCCESS);
 196#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
 197	ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
 198	BUG_ON(ret != SALRET_OK);
 199#else
 200	#error not a supported configuration
 201#endif
 202}
 203
 204static struct xpc_gru_mq_uv *
 205xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name,
 206		     irq_handler_t irq_handler)
 207{
 208	enum xp_retval xp_ret;
 209	int ret;
 210	int nid;
 211	int nasid;
 212	int pg_order;
 213	struct page *page;
 214	struct xpc_gru_mq_uv *mq;
 215	struct uv_IO_APIC_route_entry *mmr_value;
 216
 217	mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL);
 218	if (mq == NULL) {
 219		dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
 220			"a xpc_gru_mq_uv structure\n");
 221		ret = -ENOMEM;
 222		goto out_0;
 223	}
 224
 225	mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc),
 226				  GFP_KERNEL);
 227	if (mq->gru_mq_desc == NULL) {
 228		dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
 229			"a gru_message_queue_desc structure\n");
 230		ret = -ENOMEM;
 231		goto out_1;
 232	}
 233
 234	pg_order = get_order(mq_size);
 235	mq->order = pg_order + PAGE_SHIFT;
 236	mq_size = 1UL << mq->order;
 237
 238	mq->mmr_blade = uv_cpu_to_blade_id(cpu);
 239
 240	nid = cpu_to_node(cpu);
 241	page = alloc_pages_exact_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
 242				pg_order);
 
 243	if (page == NULL) {
 244		dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
 245			"bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
 246		ret = -ENOMEM;
 247		goto out_2;
 248	}
 249	mq->address = page_address(page);
 250
 251	/* enable generation of irq when GRU mq operation occurs to this mq */
 252	ret = xpc_gru_mq_watchlist_alloc_uv(mq);
 253	if (ret != 0)
 254		goto out_3;
 255
 256	ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name);
 257	if (ret != 0)
 258		goto out_4;
 259
 260	ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
 261	if (ret != 0) {
 262		dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
 263			mq->irq, -ret);
 264		goto out_5;
 265	}
 266
 267	nasid = UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpu));
 268
 269	mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value;
 270	ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size,
 271				     nasid, mmr_value->vector, mmr_value->dest);
 272	if (ret != 0) {
 273		dev_err(xpc_part, "gru_create_message_queue() returned "
 274			"error=%d\n", ret);
 275		ret = -EINVAL;
 276		goto out_6;
 277	}
 278
 279	/* allow other partitions to access this GRU mq */
 280	xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
 281	if (xp_ret != xpSuccess) {
 282		ret = -EACCES;
 283		goto out_6;
 284	}
 285
 286	return mq;
 287
 288	/* something went wrong */
 289out_6:
 290	free_irq(mq->irq, NULL);
 291out_5:
 292	xpc_release_gru_mq_irq_uv(mq);
 293out_4:
 294	xpc_gru_mq_watchlist_free_uv(mq);
 295out_3:
 296	free_pages((unsigned long)mq->address, pg_order);
 297out_2:
 298	kfree(mq->gru_mq_desc);
 299out_1:
 300	kfree(mq);
 301out_0:
 302	return ERR_PTR(ret);
 303}
 304
 305static void
 306xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
 307{
 308	unsigned int mq_size;
 309	int pg_order;
 310	int ret;
 311
 312	/* disallow other partitions to access GRU mq */
 313	mq_size = 1UL << mq->order;
 314	ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size);
 315	BUG_ON(ret != xpSuccess);
 316
 317	/* unregister irq handler and release mq irq/vector mapping */
 318	free_irq(mq->irq, NULL);
 319	xpc_release_gru_mq_irq_uv(mq);
 320
 321	/* disable generation of irq when GRU mq op occurs to this mq */
 322	xpc_gru_mq_watchlist_free_uv(mq);
 323
 324	pg_order = mq->order - PAGE_SHIFT;
 325	free_pages((unsigned long)mq->address, pg_order);
 326
 327	kfree(mq);
 328}
 329
 330static enum xp_retval
 331xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg,
 332		 size_t msg_size)
 333{
 334	enum xp_retval xp_ret;
 335	int ret;
 336
 337	while (1) {
 338		ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size);
 339		if (ret == MQE_OK) {
 340			xp_ret = xpSuccess;
 341			break;
 342		}
 343
 344		if (ret == MQE_QUEUE_FULL) {
 345			dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
 346				"error=MQE_QUEUE_FULL\n");
 347			/* !!! handle QLimit reached; delay & try again */
 348			/* ??? Do we add a limit to the number of retries? */
 349			(void)msleep_interruptible(10);
 350		} else if (ret == MQE_CONGESTION) {
 351			dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
 352				"error=MQE_CONGESTION\n");
 353			/* !!! handle LB Overflow; simply try again */
 354			/* ??? Do we add a limit to the number of retries? */
 355		} else {
 356			/* !!! Currently this is MQE_UNEXPECTED_CB_ERR */
 357			dev_err(xpc_chan, "gru_send_message_gpa() returned "
 358				"error=%d\n", ret);
 359			xp_ret = xpGruSendMqError;
 360			break;
 361		}
 362	}
 363	return xp_ret;
 364}
 365
 366static void
 367xpc_process_activate_IRQ_rcvd_uv(void)
 368{
 369	unsigned long irq_flags;
 370	short partid;
 371	struct xpc_partition *part;
 372	u8 act_state_req;
 373
 374	DBUG_ON(xpc_activate_IRQ_rcvd == 0);
 375
 376	spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 377	for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
 378		part = &xpc_partitions[partid];
 379
 380		if (part->sn.uv.act_state_req == 0)
 381			continue;
 382
 383		xpc_activate_IRQ_rcvd--;
 384		BUG_ON(xpc_activate_IRQ_rcvd < 0);
 385
 386		act_state_req = part->sn.uv.act_state_req;
 387		part->sn.uv.act_state_req = 0;
 388		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 389
 390		if (act_state_req == XPC_P_ASR_ACTIVATE_UV) {
 391			if (part->act_state == XPC_P_AS_INACTIVE)
 392				xpc_activate_partition(part);
 393			else if (part->act_state == XPC_P_AS_DEACTIVATING)
 394				XPC_DEACTIVATE_PARTITION(part, xpReactivating);
 395
 396		} else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) {
 397			if (part->act_state == XPC_P_AS_INACTIVE)
 398				xpc_activate_partition(part);
 399			else
 400				XPC_DEACTIVATE_PARTITION(part, xpReactivating);
 401
 402		} else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) {
 403			XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason);
 404
 405		} else {
 406			BUG();
 407		}
 408
 409		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 410		if (xpc_activate_IRQ_rcvd == 0)
 411			break;
 412	}
 413	spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 414
 415}
 416
 417static void
 418xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
 419			      struct xpc_activate_mq_msghdr_uv *msg_hdr,
 420			      int part_setup,
 421			      int *wakeup_hb_checker)
 422{
 423	unsigned long irq_flags;
 424	struct xpc_partition_uv *part_uv = &part->sn.uv;
 425	struct xpc_openclose_args *args;
 426
 427	part_uv->remote_act_state = msg_hdr->act_state;
 428
 429	switch (msg_hdr->type) {
 430	case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
 431		/* syncing of remote_act_state was just done above */
 432		break;
 433
 434	case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
 435		struct xpc_activate_mq_msg_activate_req_uv *msg;
 436
 437		/*
 438		 * ??? Do we deal here with ts_jiffies being different
 439		 * ??? if act_state != XPC_P_AS_INACTIVE instead of
 440		 * ??? below?
 441		 */
 442		msg = container_of(msg_hdr, struct
 443				   xpc_activate_mq_msg_activate_req_uv, hdr);
 444
 445		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 446		if (part_uv->act_state_req == 0)
 447			xpc_activate_IRQ_rcvd++;
 448		part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
 449		part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
 450		part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
 451		part_uv->heartbeat_gpa = msg->heartbeat_gpa;
 452
 453		if (msg->activate_gru_mq_desc_gpa !=
 454		    part_uv->activate_gru_mq_desc_gpa) {
 455			spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
 456			part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
 457			spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
 458			part_uv->activate_gru_mq_desc_gpa =
 459			    msg->activate_gru_mq_desc_gpa;
 460		}
 461		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 462
 463		(*wakeup_hb_checker)++;
 464		break;
 465	}
 466	case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
 467		struct xpc_activate_mq_msg_deactivate_req_uv *msg;
 468
 469		msg = container_of(msg_hdr, struct
 470				   xpc_activate_mq_msg_deactivate_req_uv, hdr);
 471
 472		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 473		if (part_uv->act_state_req == 0)
 474			xpc_activate_IRQ_rcvd++;
 475		part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
 476		part_uv->reason = msg->reason;
 477		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 478
 479		(*wakeup_hb_checker)++;
 480		return;
 481	}
 482	case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
 483		struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
 484
 485		if (!part_setup)
 486			break;
 487
 488		msg = container_of(msg_hdr, struct
 489				   xpc_activate_mq_msg_chctl_closerequest_uv,
 490				   hdr);
 491		args = &part->remote_openclose_args[msg->ch_number];
 492		args->reason = msg->reason;
 493
 494		spin_lock_irqsave(&part->chctl_lock, irq_flags);
 495		part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
 496		spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
 497
 498		xpc_wakeup_channel_mgr(part);
 499		break;
 500	}
 501	case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
 502		struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
 503
 504		if (!part_setup)
 505			break;
 506
 507		msg = container_of(msg_hdr, struct
 508				   xpc_activate_mq_msg_chctl_closereply_uv,
 509				   hdr);
 510
 511		spin_lock_irqsave(&part->chctl_lock, irq_flags);
 512		part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
 513		spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
 514
 515		xpc_wakeup_channel_mgr(part);
 516		break;
 517	}
 518	case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
 519		struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
 520
 521		if (!part_setup)
 522			break;
 523
 524		msg = container_of(msg_hdr, struct
 525				   xpc_activate_mq_msg_chctl_openrequest_uv,
 526				   hdr);
 527		args = &part->remote_openclose_args[msg->ch_number];
 528		args->entry_size = msg->entry_size;
 529		args->local_nentries = msg->local_nentries;
 530
 531		spin_lock_irqsave(&part->chctl_lock, irq_flags);
 532		part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
 533		spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
 534
 535		xpc_wakeup_channel_mgr(part);
 536		break;
 537	}
 538	case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
 539		struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
 540
 541		if (!part_setup)
 542			break;
 543
 544		msg = container_of(msg_hdr, struct
 545				   xpc_activate_mq_msg_chctl_openreply_uv, hdr);
 546		args = &part->remote_openclose_args[msg->ch_number];
 547		args->remote_nentries = msg->remote_nentries;
 548		args->local_nentries = msg->local_nentries;
 549		args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
 550
 551		spin_lock_irqsave(&part->chctl_lock, irq_flags);
 552		part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
 553		spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
 554
 555		xpc_wakeup_channel_mgr(part);
 556		break;
 557	}
 558	case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: {
 559		struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg;
 560
 561		if (!part_setup)
 562			break;
 563
 564		msg = container_of(msg_hdr, struct
 565				xpc_activate_mq_msg_chctl_opencomplete_uv, hdr);
 566		spin_lock_irqsave(&part->chctl_lock, irq_flags);
 567		part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE;
 568		spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
 569
 570		xpc_wakeup_channel_mgr(part);
 571	}
 572	case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
 573		spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
 574		part_uv->flags |= XPC_P_ENGAGED_UV;
 575		spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
 576		break;
 577
 578	case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
 579		spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
 580		part_uv->flags &= ~XPC_P_ENGAGED_UV;
 581		spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
 582		break;
 583
 584	default:
 585		dev_err(xpc_part, "received unknown activate_mq msg type=%d "
 586			"from partition=%d\n", msg_hdr->type, XPC_PARTID(part));
 587
 588		/* get hb checker to deactivate from the remote partition */
 589		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 590		if (part_uv->act_state_req == 0)
 591			xpc_activate_IRQ_rcvd++;
 592		part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
 593		part_uv->reason = xpBadMsgType;
 594		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 595
 596		(*wakeup_hb_checker)++;
 597		return;
 598	}
 599
 600	if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
 601	    part->remote_rp_ts_jiffies != 0) {
 602		/*
 603		 * ??? Does what we do here need to be sensitive to
 604		 * ??? act_state or remote_act_state?
 605		 */
 606		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 607		if (part_uv->act_state_req == 0)
 608			xpc_activate_IRQ_rcvd++;
 609		part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
 610		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 611
 612		(*wakeup_hb_checker)++;
 613	}
 614}
 615
 616static irqreturn_t
 617xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
 618{
 619	struct xpc_activate_mq_msghdr_uv *msg_hdr;
 620	short partid;
 621	struct xpc_partition *part;
 622	int wakeup_hb_checker = 0;
 623	int part_referenced;
 624
 625	while (1) {
 626		msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc);
 627		if (msg_hdr == NULL)
 628			break;
 629
 630		partid = msg_hdr->partid;
 631		if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
 632			dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() "
 633				"received invalid partid=0x%x in message\n",
 634				partid);
 635		} else {
 636			part = &xpc_partitions[partid];
 637
 638			part_referenced = xpc_part_ref(part);
 639			xpc_handle_activate_mq_msg_uv(part, msg_hdr,
 640						      part_referenced,
 641						      &wakeup_hb_checker);
 642			if (part_referenced)
 643				xpc_part_deref(part);
 644		}
 645
 646		gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr);
 647	}
 648
 649	if (wakeup_hb_checker)
 650		wake_up_interruptible(&xpc_activate_IRQ_wq);
 651
 652	return IRQ_HANDLED;
 653}
 654
 655static enum xp_retval
 656xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc,
 657				unsigned long gru_mq_desc_gpa)
 658{
 659	enum xp_retval ret;
 660
 661	ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa,
 662			       sizeof(struct gru_message_queue_desc));
 663	if (ret == xpSuccess)
 664		gru_mq_desc->mq = NULL;
 665
 666	return ret;
 667}
 668
 669static enum xp_retval
 670xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
 671			 int msg_type)
 672{
 673	struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
 674	struct xpc_partition_uv *part_uv = &part->sn.uv;
 675	struct gru_message_queue_desc *gru_mq_desc;
 676	unsigned long irq_flags;
 677	enum xp_retval ret;
 678
 679	DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
 680
 681	msg_hdr->type = msg_type;
 682	msg_hdr->partid = xp_partition_id;
 683	msg_hdr->act_state = part->act_state;
 684	msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
 685
 686	mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
 687again:
 688	if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) {
 689		gru_mq_desc = part_uv->cached_activate_gru_mq_desc;
 690		if (gru_mq_desc == NULL) {
 691			gru_mq_desc = kmalloc(sizeof(struct
 692					      gru_message_queue_desc),
 693					      GFP_KERNEL);
 694			if (gru_mq_desc == NULL) {
 695				ret = xpNoMemory;
 696				goto done;
 697			}
 698			part_uv->cached_activate_gru_mq_desc = gru_mq_desc;
 699		}
 700
 701		ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc,
 702						      part_uv->
 703						      activate_gru_mq_desc_gpa);
 704		if (ret != xpSuccess)
 705			goto done;
 706
 707		spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
 708		part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
 709		spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
 710	}
 711
 712	/* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
 713	ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg,
 714			       msg_size);
 715	if (ret != xpSuccess) {
 716		smp_rmb();	/* ensure a fresh copy of part_uv->flags */
 717		if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV))
 718			goto again;
 719	}
 720done:
 721	mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex);
 722	return ret;
 723}
 724
 725static void
 726xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg,
 727			      size_t msg_size, int msg_type)
 728{
 729	enum xp_retval ret;
 730
 731	ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
 732	if (unlikely(ret != xpSuccess))
 733		XPC_DEACTIVATE_PARTITION(part, ret);
 734}
 735
 736static void
 737xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
 738			 void *msg, size_t msg_size, int msg_type)
 739{
 740	struct xpc_partition *part = &xpc_partitions[ch->partid];
 741	enum xp_retval ret;
 742
 743	ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
 744	if (unlikely(ret != xpSuccess)) {
 745		if (irq_flags != NULL)
 746			spin_unlock_irqrestore(&ch->lock, *irq_flags);
 747
 748		XPC_DEACTIVATE_PARTITION(part, ret);
 749
 750		if (irq_flags != NULL)
 751			spin_lock_irqsave(&ch->lock, *irq_flags);
 752	}
 753}
 754
 755static void
 756xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req)
 757{
 758	unsigned long irq_flags;
 759	struct xpc_partition_uv *part_uv = &part->sn.uv;
 760
 761	/*
 762	 * !!! Make our side think that the remote partition sent an activate
 763	 * !!! mq message our way by doing what the activate IRQ handler would
 764	 * !!! do had one really been sent.
 765	 */
 766
 767	spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 768	if (part_uv->act_state_req == 0)
 769		xpc_activate_IRQ_rcvd++;
 770	part_uv->act_state_req = act_state_req;
 771	spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
 772
 773	wake_up_interruptible(&xpc_activate_IRQ_wq);
 774}
 775
 776static enum xp_retval
 777xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
 778				  size_t *len)
 779{
 780	s64 status;
 781	enum xp_retval ret;
 782
 783#if defined CONFIG_X86_64
 784	status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa,
 785					  (u64 *)len);
 786	if (status == BIOS_STATUS_SUCCESS)
 787		ret = xpSuccess;
 788	else if (status == BIOS_STATUS_MORE_PASSES)
 789		ret = xpNeedMoreInfo;
 790	else
 791		ret = xpBiosError;
 792
 793#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
 794	status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
 795	if (status == SALRET_OK)
 796		ret = xpSuccess;
 797	else if (status == SALRET_MORE_PASSES)
 798		ret = xpNeedMoreInfo;
 799	else
 800		ret = xpSalError;
 801
 802#else
 803	#error not a supported configuration
 804#endif
 805
 806	return ret;
 807}
 808
 809static int
 810xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp)
 811{
 812	xpc_heartbeat_uv =
 813	    &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat;
 814	rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv);
 815	rp->sn.uv.activate_gru_mq_desc_gpa =
 816	    uv_gpa(xpc_activate_mq_uv->gru_mq_desc);
 817	return 0;
 818}
 819
 820static void
 821xpc_allow_hb_uv(short partid)
 822{
 823}
 824
 825static void
 826xpc_disallow_hb_uv(short partid)
 827{
 828}
 829
 830static void
 831xpc_disallow_all_hbs_uv(void)
 832{
 833}
 834
 835static void
 836xpc_increment_heartbeat_uv(void)
 837{
 838	xpc_heartbeat_uv->value++;
 839}
 840
 841static void
 842xpc_offline_heartbeat_uv(void)
 843{
 844	xpc_increment_heartbeat_uv();
 845	xpc_heartbeat_uv->offline = 1;
 846}
 847
 848static void
 849xpc_online_heartbeat_uv(void)
 850{
 851	xpc_increment_heartbeat_uv();
 852	xpc_heartbeat_uv->offline = 0;
 853}
 854
 855static void
 856xpc_heartbeat_init_uv(void)
 857{
 858	xpc_heartbeat_uv->value = 1;
 859	xpc_heartbeat_uv->offline = 0;
 860}
 861
 862static void
 863xpc_heartbeat_exit_uv(void)
 864{
 865	xpc_offline_heartbeat_uv();
 866}
 867
 868static enum xp_retval
 869xpc_get_remote_heartbeat_uv(struct xpc_partition *part)
 870{
 871	struct xpc_partition_uv *part_uv = &part->sn.uv;
 872	enum xp_retval ret;
 873
 874	ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat),
 875			       part_uv->heartbeat_gpa,
 876			       sizeof(struct xpc_heartbeat_uv));
 877	if (ret != xpSuccess)
 878		return ret;
 879
 880	if (part_uv->cached_heartbeat.value == part->last_heartbeat &&
 881	    !part_uv->cached_heartbeat.offline) {
 882
 883		ret = xpNoHeartbeat;
 884	} else {
 885		part->last_heartbeat = part_uv->cached_heartbeat.value;
 886	}
 887	return ret;
 888}
 889
 890static void
 891xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
 892				    unsigned long remote_rp_gpa, int nasid)
 893{
 894	short partid = remote_rp->SAL_partid;
 895	struct xpc_partition *part = &xpc_partitions[partid];
 896	struct xpc_activate_mq_msg_activate_req_uv msg;
 897
 898	part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
 899	part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
 900	part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa;
 901	part->sn.uv.activate_gru_mq_desc_gpa =
 902	    remote_rp->sn.uv.activate_gru_mq_desc_gpa;
 903
 904	/*
 905	 * ??? Is it a good idea to make this conditional on what is
 906	 * ??? potentially stale state information?
 907	 */
 908	if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
 909		msg.rp_gpa = uv_gpa(xpc_rsvd_page);
 910		msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa;
 911		msg.activate_gru_mq_desc_gpa =
 912		    xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa;
 913		xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
 914					   XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
 915	}
 916
 917	if (part->act_state == XPC_P_AS_INACTIVE)
 918		xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
 919}
 920
 921static void
 922xpc_request_partition_reactivation_uv(struct xpc_partition *part)
 923{
 924	xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
 925}
 926
 927static void
 928xpc_request_partition_deactivation_uv(struct xpc_partition *part)
 929{
 930	struct xpc_activate_mq_msg_deactivate_req_uv msg;
 931
 932	/*
 933	 * ??? Is it a good idea to make this conditional on what is
 934	 * ??? potentially stale state information?
 935	 */
 936	if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING &&
 937	    part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) {
 938
 939		msg.reason = part->reason;
 940		xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
 941					 XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV);
 942	}
 943}
 944
 945static void
 946xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part)
 947{
 948	/* nothing needs to be done */
 949	return;
 950}
 951
 952static void
 953xpc_init_fifo_uv(struct xpc_fifo_head_uv *head)
 954{
 955	head->first = NULL;
 956	head->last = NULL;
 957	spin_lock_init(&head->lock);
 958	head->n_entries = 0;
 959}
 960
 961static void *
 962xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head)
 963{
 964	unsigned long irq_flags;
 965	struct xpc_fifo_entry_uv *first;
 966
 967	spin_lock_irqsave(&head->lock, irq_flags);
 968	first = head->first;
 969	if (head->first != NULL) {
 970		head->first = first->next;
 971		if (head->first == NULL)
 972			head->last = NULL;
 973
 974		head->n_entries--;
 975		BUG_ON(head->n_entries < 0);
 976
 977		first->next = NULL;
 978	}
 979	spin_unlock_irqrestore(&head->lock, irq_flags);
 980	return first;
 981}
 982
 983static void
 984xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head,
 985		      struct xpc_fifo_entry_uv *last)
 986{
 987	unsigned long irq_flags;
 988
 989	last->next = NULL;
 990	spin_lock_irqsave(&head->lock, irq_flags);
 991	if (head->last != NULL)
 992		head->last->next = last;
 993	else
 994		head->first = last;
 995	head->last = last;
 996	head->n_entries++;
 997	spin_unlock_irqrestore(&head->lock, irq_flags);
 998}
 999
1000static int
1001xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head)
1002{
1003	return head->n_entries;
1004}
1005
1006/*
1007 * Setup the channel structures that are uv specific.
1008 */
1009static enum xp_retval
1010xpc_setup_ch_structures_uv(struct xpc_partition *part)
1011{
1012	struct xpc_channel_uv *ch_uv;
1013	int ch_number;
1014
1015	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
1016		ch_uv = &part->channels[ch_number].sn.uv;
1017
1018		xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1019		xpc_init_fifo_uv(&ch_uv->recv_msg_list);
1020	}
1021
1022	return xpSuccess;
1023}
1024
1025/*
1026 * Teardown the channel structures that are uv specific.
1027 */
1028static void
1029xpc_teardown_ch_structures_uv(struct xpc_partition *part)
1030{
1031	/* nothing needs to be done */
1032	return;
1033}
1034
1035static enum xp_retval
1036xpc_make_first_contact_uv(struct xpc_partition *part)
1037{
1038	struct xpc_activate_mq_msg_uv msg;
1039
1040	/*
1041	 * We send a sync msg to get the remote partition's remote_act_state
1042	 * updated to our current act_state which at this point should
1043	 * be XPC_P_AS_ACTIVATING.
1044	 */
1045	xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1046				      XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV);
1047
1048	while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) ||
1049		 (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) {
1050
1051		dev_dbg(xpc_part, "waiting to make first contact with "
1052			"partition %d\n", XPC_PARTID(part));
1053
1054		/* wait a 1/4 of a second or so */
1055		(void)msleep_interruptible(250);
1056
1057		if (part->act_state == XPC_P_AS_DEACTIVATING)
1058			return part->reason;
1059	}
1060
1061	return xpSuccess;
1062}
1063
1064static u64
1065xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
1066{
1067	unsigned long irq_flags;
1068	union xpc_channel_ctl_flags chctl;
1069
1070	spin_lock_irqsave(&part->chctl_lock, irq_flags);
1071	chctl = part->chctl;
1072	if (chctl.all_flags != 0)
1073		part->chctl.all_flags = 0;
1074
1075	spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
1076	return chctl.all_flags;
1077}
1078
1079static enum xp_retval
1080xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch)
1081{
1082	struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1083	struct xpc_send_msg_slot_uv *msg_slot;
1084	unsigned long irq_flags;
1085	int nentries;
1086	int entry;
1087	size_t nbytes;
1088
1089	for (nentries = ch->local_nentries; nentries > 0; nentries--) {
1090		nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv);
1091		ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL);
1092		if (ch_uv->send_msg_slots == NULL)
1093			continue;
1094
1095		for (entry = 0; entry < nentries; entry++) {
1096			msg_slot = &ch_uv->send_msg_slots[entry];
1097
1098			msg_slot->msg_slot_number = entry;
1099			xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list,
1100					      &msg_slot->next);
1101		}
1102
1103		spin_lock_irqsave(&ch->lock, irq_flags);
1104		if (nentries < ch->local_nentries)
1105			ch->local_nentries = nentries;
1106		spin_unlock_irqrestore(&ch->lock, irq_flags);
1107		return xpSuccess;
1108	}
1109
1110	return xpNoMemory;
1111}
1112
1113static enum xp_retval
1114xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch)
1115{
1116	struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1117	struct xpc_notify_mq_msg_uv *msg_slot;
1118	unsigned long irq_flags;
1119	int nentries;
1120	int entry;
1121	size_t nbytes;
1122
1123	for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
1124		nbytes = nentries * ch->entry_size;
1125		ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL);
1126		if (ch_uv->recv_msg_slots == NULL)
1127			continue;
1128
1129		for (entry = 0; entry < nentries; entry++) {
1130			msg_slot = ch_uv->recv_msg_slots +
1131			    entry * ch->entry_size;
1132
1133			msg_slot->hdr.msg_slot_number = entry;
1134		}
1135
1136		spin_lock_irqsave(&ch->lock, irq_flags);
1137		if (nentries < ch->remote_nentries)
1138			ch->remote_nentries = nentries;
1139		spin_unlock_irqrestore(&ch->lock, irq_flags);
1140		return xpSuccess;
1141	}
1142
1143	return xpNoMemory;
1144}
1145
1146/*
1147 * Allocate msg_slots associated with the channel.
1148 */
1149static enum xp_retval
1150xpc_setup_msg_structures_uv(struct xpc_channel *ch)
1151{
1152	static enum xp_retval ret;
1153	struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1154
1155	DBUG_ON(ch->flags & XPC_C_SETUP);
1156
1157	ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct
1158						   gru_message_queue_desc),
1159						   GFP_KERNEL);
1160	if (ch_uv->cached_notify_gru_mq_desc == NULL)
1161		return xpNoMemory;
1162
1163	ret = xpc_allocate_send_msg_slot_uv(ch);
1164	if (ret == xpSuccess) {
1165
1166		ret = xpc_allocate_recv_msg_slot_uv(ch);
1167		if (ret != xpSuccess) {
1168			kfree(ch_uv->send_msg_slots);
1169			xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1170		}
1171	}
1172	return ret;
1173}
1174
1175/*
1176 * Free up msg_slots and clear other stuff that were setup for the specified
1177 * channel.
1178 */
1179static void
1180xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
1181{
1182	struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1183
1184	DBUG_ON(!spin_is_locked(&ch->lock));
1185
1186	kfree(ch_uv->cached_notify_gru_mq_desc);
1187	ch_uv->cached_notify_gru_mq_desc = NULL;
1188
1189	if (ch->flags & XPC_C_SETUP) {
1190		xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
1191		kfree(ch_uv->send_msg_slots);
1192		xpc_init_fifo_uv(&ch_uv->recv_msg_list);
1193		kfree(ch_uv->recv_msg_slots);
1194	}
1195}
1196
1197static void
1198xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1199{
1200	struct xpc_activate_mq_msg_chctl_closerequest_uv msg;
1201
1202	msg.ch_number = ch->number;
1203	msg.reason = ch->reason;
1204	xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1205				    XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV);
1206}
1207
1208static void
1209xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1210{
1211	struct xpc_activate_mq_msg_chctl_closereply_uv msg;
1212
1213	msg.ch_number = ch->number;
1214	xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1215				    XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV);
1216}
1217
1218static void
1219xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1220{
1221	struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
1222
1223	msg.ch_number = ch->number;
1224	msg.entry_size = ch->entry_size;
1225	msg.local_nentries = ch->local_nentries;
1226	xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1227				    XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV);
1228}
1229
1230static void
1231xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1232{
1233	struct xpc_activate_mq_msg_chctl_openreply_uv msg;
1234
1235	msg.ch_number = ch->number;
1236	msg.local_nentries = ch->local_nentries;
1237	msg.remote_nentries = ch->remote_nentries;
1238	msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc);
1239	xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1240				    XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
1241}
1242
1243static void
1244xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags)
1245{
1246	struct xpc_activate_mq_msg_chctl_opencomplete_uv msg;
1247
1248	msg.ch_number = ch->number;
1249	xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
1250				    XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV);
1251}
1252
1253static void
1254xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number)
1255{
1256	unsigned long irq_flags;
1257
1258	spin_lock_irqsave(&part->chctl_lock, irq_flags);
1259	part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST;
1260	spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
1261
1262	xpc_wakeup_channel_mgr(part);
1263}
1264
1265static enum xp_retval
1266xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
1267			       unsigned long gru_mq_desc_gpa)
1268{
1269	struct xpc_channel_uv *ch_uv = &ch->sn.uv;
1270
1271	DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL);
1272	return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc,
1273					       gru_mq_desc_gpa);
1274}
1275
1276static void
1277xpc_indicate_partition_engaged_uv(struct xpc_partition *part)
1278{
1279	struct xpc_activate_mq_msg_uv msg;
1280
1281	xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1282				      XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV);
1283}
1284
1285static void
1286xpc_indicate_partition_disengaged_uv(struct xpc_partition *part)
1287{
1288	struct xpc_activate_mq_msg_uv msg;
1289
1290	xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
1291				      XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV);
1292}
1293
1294static void
1295xpc_assume_partition_disengaged_uv(short partid)
1296{
1297	struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv;
1298	unsigned long irq_flags;
1299
1300	spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
1301	part_uv->flags &= ~XPC_P_ENGAGED_UV;
1302	spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
1303}
1304
1305static int
1306xpc_partition_engaged_uv(short partid)
1307{
1308	return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
1309}
1310
1311static int
1312xpc_any_partition_engaged_uv(void)
1313{
1314	struct xpc_partition_uv *part_uv;
1315	short partid;
1316
1317	for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
1318		part_uv = &xpc_partitions[partid].sn.uv;
1319		if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
1320			return 1;
1321	}
1322	return 0;
1323}
1324
1325static enum xp_retval
1326xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags,
1327			 struct xpc_send_msg_slot_uv **address_of_msg_slot)
1328{
1329	enum xp_retval ret;
1330	struct xpc_send_msg_slot_uv *msg_slot;
1331	struct xpc_fifo_entry_uv *entry;
1332
1333	while (1) {
1334		entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list);
1335		if (entry != NULL)
1336			break;
1337
1338		if (flags & XPC_NOWAIT)
1339			return xpNoWait;
1340
1341		ret = xpc_allocate_msg_wait(ch);
1342		if (ret != xpInterrupted && ret != xpTimeout)
1343			return ret;
1344	}
1345
1346	msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next);
1347	*address_of_msg_slot = msg_slot;
1348	return xpSuccess;
1349}
1350
1351static void
1352xpc_free_msg_slot_uv(struct xpc_channel *ch,
1353		     struct xpc_send_msg_slot_uv *msg_slot)
1354{
1355	xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next);
1356
1357	/* wakeup anyone waiting for a free msg slot */
1358	if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
1359		wake_up(&ch->msg_allocate_wq);
1360}
1361
1362static void
1363xpc_notify_sender_uv(struct xpc_channel *ch,
1364		     struct xpc_send_msg_slot_uv *msg_slot,
1365		     enum xp_retval reason)
1366{
1367	xpc_notify_func func = msg_slot->func;
1368
1369	if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) {
1370
1371		atomic_dec(&ch->n_to_notify);
1372
1373		dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p "
1374			"msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
1375			msg_slot->msg_slot_number, ch->partid, ch->number);
1376
1377		func(reason, ch->partid, ch->number, msg_slot->key);
1378
1379		dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p "
1380			"msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
1381			msg_slot->msg_slot_number, ch->partid, ch->number);
1382	}
1383}
1384
1385static void
1386xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch,
1387			    struct xpc_notify_mq_msg_uv *msg)
1388{
1389	struct xpc_send_msg_slot_uv *msg_slot;
1390	int entry = msg->hdr.msg_slot_number % ch->local_nentries;
1391
1392	msg_slot = &ch->sn.uv.send_msg_slots[entry];
1393
1394	BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number);
1395	msg_slot->msg_slot_number += ch->local_nentries;
1396
1397	if (msg_slot->func != NULL)
1398		xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered);
1399
1400	xpc_free_msg_slot_uv(ch, msg_slot);
1401}
1402
1403static void
1404xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
1405			    struct xpc_notify_mq_msg_uv *msg)
1406{
1407	struct xpc_partition_uv *part_uv = &part->sn.uv;
1408	struct xpc_channel *ch;
1409	struct xpc_channel_uv *ch_uv;
1410	struct xpc_notify_mq_msg_uv *msg_slot;
1411	unsigned long irq_flags;
1412	int ch_number = msg->hdr.ch_number;
1413
1414	if (unlikely(ch_number >= part->nchannels)) {
1415		dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
1416			"channel number=0x%x in message from partid=%d\n",
1417			ch_number, XPC_PARTID(part));
1418
1419		/* get hb checker to deactivate from the remote partition */
1420		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
1421		if (part_uv->act_state_req == 0)
1422			xpc_activate_IRQ_rcvd++;
1423		part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
1424		part_uv->reason = xpBadChannelNumber;
1425		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
1426
1427		wake_up_interruptible(&xpc_activate_IRQ_wq);
1428		return;
1429	}
1430
1431	ch = &part->channels[ch_number];
1432	xpc_msgqueue_ref(ch);
1433
1434	if (!(ch->flags & XPC_C_CONNECTED)) {
1435		xpc_msgqueue_deref(ch);
1436		return;
1437	}
1438
1439	/* see if we're really dealing with an ACK for a previously sent msg */
1440	if (msg->hdr.size == 0) {
1441		xpc_handle_notify_mq_ack_uv(ch, msg);
1442		xpc_msgqueue_deref(ch);
1443		return;
1444	}
1445
1446	/* we're dealing with a normal message sent via the notify_mq */
1447	ch_uv = &ch->sn.uv;
1448
1449	msg_slot = ch_uv->recv_msg_slots +
1450	    (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size;
1451
1452	BUG_ON(msg_slot->hdr.size != 0);
1453
1454	memcpy(msg_slot, msg, msg->hdr.size);
1455
1456	xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);
1457
1458	if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
1459		/*
1460		 * If there is an existing idle kthread get it to deliver
1461		 * the payload, otherwise we'll have to get the channel mgr
1462		 * for this partition to create a kthread to do the delivery.
1463		 */
1464		if (atomic_read(&ch->kthreads_idle) > 0)
1465			wake_up_nr(&ch->idle_wq, 1);
1466		else
1467			xpc_send_chctl_local_msgrequest_uv(part, ch->number);
1468	}
1469	xpc_msgqueue_deref(ch);
1470}
1471
1472static irqreturn_t
1473xpc_handle_notify_IRQ_uv(int irq, void *dev_id)
1474{
1475	struct xpc_notify_mq_msg_uv *msg;
1476	short partid;
1477	struct xpc_partition *part;
1478
1479	while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) !=
1480	       NULL) {
1481
1482		partid = msg->hdr.partid;
1483		if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
1484			dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received "
1485				"invalid partid=0x%x in message\n", partid);
1486		} else {
1487			part = &xpc_partitions[partid];
1488
1489			if (xpc_part_ref(part)) {
1490				xpc_handle_notify_mq_msg_uv(part, msg);
1491				xpc_part_deref(part);
1492			}
1493		}
1494
1495		gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg);
1496	}
1497
1498	return IRQ_HANDLED;
1499}
1500
1501static int
1502xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch)
1503{
1504	return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list);
1505}
1506
1507static void
1508xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number)
1509{
1510	struct xpc_channel *ch = &part->channels[ch_number];
1511	int ndeliverable_payloads;
1512
1513	xpc_msgqueue_ref(ch);
1514
1515	ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch);
1516
1517	if (ndeliverable_payloads > 0 &&
1518	    (ch->flags & XPC_C_CONNECTED) &&
1519	    (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) {
1520
1521		xpc_activate_kthreads(ch, ndeliverable_payloads);
1522	}
1523
1524	xpc_msgqueue_deref(ch);
1525}
1526
1527static enum xp_retval
1528xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload,
1529		    u16 payload_size, u8 notify_type, xpc_notify_func func,
1530		    void *key)
1531{
1532	enum xp_retval ret = xpSuccess;
1533	struct xpc_send_msg_slot_uv *msg_slot = NULL;
1534	struct xpc_notify_mq_msg_uv *msg;
1535	u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV];
1536	size_t msg_size;
1537
1538	DBUG_ON(notify_type != XPC_N_CALL);
1539
1540	msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size;
1541	if (msg_size > ch->entry_size)
1542		return xpPayloadTooBig;
1543
1544	xpc_msgqueue_ref(ch);
1545
1546	if (ch->flags & XPC_C_DISCONNECTING) {
1547		ret = ch->reason;
1548		goto out_1;
1549	}
1550	if (!(ch->flags & XPC_C_CONNECTED)) {
1551		ret = xpNotConnected;
1552		goto out_1;
1553	}
1554
1555	ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot);
1556	if (ret != xpSuccess)
1557		goto out_1;
1558
1559	if (func != NULL) {
1560		atomic_inc(&ch->n_to_notify);
1561
1562		msg_slot->key = key;
1563		smp_wmb(); /* a non-NULL func must hit memory after the key */
1564		msg_slot->func = func;
1565
1566		if (ch->flags & XPC_C_DISCONNECTING) {
1567			ret = ch->reason;
1568			goto out_2;
1569		}
1570	}
1571
1572	msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer;
1573	msg->hdr.partid = xp_partition_id;
1574	msg->hdr.ch_number = ch->number;
1575	msg->hdr.size = msg_size;
1576	msg->hdr.msg_slot_number = msg_slot->msg_slot_number;
1577	memcpy(&msg->payload, payload, payload_size);
1578
1579	ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
1580			       msg_size);
1581	if (ret == xpSuccess)
1582		goto out_1;
1583
1584	XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
1585out_2:
1586	if (func != NULL) {
1587		/*
1588		 * Try to NULL the msg_slot's func field. If we fail, then
1589		 * xpc_notify_senders_of_disconnect_uv() beat us to it, in which
1590		 * case we need to pretend we succeeded to send the message
1591		 * since the user will get a callout for the disconnect error
1592		 * by xpc_notify_senders_of_disconnect_uv(), and to also get an
1593		 * error returned here will confuse them. Additionally, since
1594		 * in this case the channel is being disconnected we don't need
1595		 * to put the the msg_slot back on the free list.
1596		 */
1597		if (cmpxchg(&msg_slot->func, func, NULL) != func) {
1598			ret = xpSuccess;
1599			goto out_1;
1600		}
1601
1602		msg_slot->key = NULL;
1603		atomic_dec(&ch->n_to_notify);
1604	}
1605	xpc_free_msg_slot_uv(ch, msg_slot);
1606out_1:
1607	xpc_msgqueue_deref(ch);
1608	return ret;
1609}
1610
1611/*
1612 * Tell the callers of xpc_send_notify() that the status of their payloads
1613 * is unknown because the channel is now disconnecting.
1614 *
1615 * We don't worry about putting these msg_slots on the free list since the
1616 * msg_slots themselves are about to be kfree'd.
1617 */
1618static void
1619xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch)
1620{
1621	struct xpc_send_msg_slot_uv *msg_slot;
1622	int entry;
1623
1624	DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
1625
1626	for (entry = 0; entry < ch->local_nentries; entry++) {
1627
1628		if (atomic_read(&ch->n_to_notify) == 0)
1629			break;
1630
1631		msg_slot = &ch->sn.uv.send_msg_slots[entry];
1632		if (msg_slot->func != NULL)
1633			xpc_notify_sender_uv(ch, msg_slot, ch->reason);
1634	}
1635}
1636
1637/*
1638 * Get the next deliverable message's payload.
1639 */
1640static void *
1641xpc_get_deliverable_payload_uv(struct xpc_channel *ch)
1642{
1643	struct xpc_fifo_entry_uv *entry;
1644	struct xpc_notify_mq_msg_uv *msg;
1645	void *payload = NULL;
1646
1647	if (!(ch->flags & XPC_C_DISCONNECTING)) {
1648		entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list);
1649		if (entry != NULL) {
1650			msg = container_of(entry, struct xpc_notify_mq_msg_uv,
1651					   hdr.u.next);
1652			payload = &msg->payload;
1653		}
1654	}
1655	return payload;
1656}
1657
1658static void
1659xpc_received_payload_uv(struct xpc_channel *ch, void *payload)
1660{
1661	struct xpc_notify_mq_msg_uv *msg;
1662	enum xp_retval ret;
1663
1664	msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload);
1665
1666	/* return an ACK to the sender of this message */
1667
1668	msg->hdr.partid = xp_partition_id;
1669	msg->hdr.size = 0;	/* size of zero indicates this is an ACK */
1670
1671	ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
1672			       sizeof(struct xpc_notify_mq_msghdr_uv));
1673	if (ret != xpSuccess)
1674		XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
1675}
1676
1677static struct xpc_arch_operations xpc_arch_ops_uv = {
1678	.setup_partitions = xpc_setup_partitions_uv,
1679	.teardown_partitions = xpc_teardown_partitions_uv,
1680	.process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv,
1681	.get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv,
1682	.setup_rsvd_page = xpc_setup_rsvd_page_uv,
1683
1684	.allow_hb = xpc_allow_hb_uv,
1685	.disallow_hb = xpc_disallow_hb_uv,
1686	.disallow_all_hbs = xpc_disallow_all_hbs_uv,
1687	.increment_heartbeat = xpc_increment_heartbeat_uv,
1688	.offline_heartbeat = xpc_offline_heartbeat_uv,
1689	.online_heartbeat = xpc_online_heartbeat_uv,
1690	.heartbeat_init = xpc_heartbeat_init_uv,
1691	.heartbeat_exit = xpc_heartbeat_exit_uv,
1692	.get_remote_heartbeat = xpc_get_remote_heartbeat_uv,
1693
1694	.request_partition_activation =
1695		xpc_request_partition_activation_uv,
1696	.request_partition_reactivation =
1697		xpc_request_partition_reactivation_uv,
1698	.request_partition_deactivation =
1699		xpc_request_partition_deactivation_uv,
1700	.cancel_partition_deactivation_request =
1701		xpc_cancel_partition_deactivation_request_uv,
1702
1703	.setup_ch_structures = xpc_setup_ch_structures_uv,
1704	.teardown_ch_structures = xpc_teardown_ch_structures_uv,
1705
1706	.make_first_contact = xpc_make_first_contact_uv,
1707
1708	.get_chctl_all_flags = xpc_get_chctl_all_flags_uv,
1709	.send_chctl_closerequest = xpc_send_chctl_closerequest_uv,
1710	.send_chctl_closereply = xpc_send_chctl_closereply_uv,
1711	.send_chctl_openrequest = xpc_send_chctl_openrequest_uv,
1712	.send_chctl_openreply = xpc_send_chctl_openreply_uv,
1713	.send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv,
1714	.process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv,
1715
1716	.save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv,
1717
1718	.setup_msg_structures = xpc_setup_msg_structures_uv,
1719	.teardown_msg_structures = xpc_teardown_msg_structures_uv,
1720
1721	.indicate_partition_engaged = xpc_indicate_partition_engaged_uv,
1722	.indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv,
1723	.assume_partition_disengaged = xpc_assume_partition_disengaged_uv,
1724	.partition_engaged = xpc_partition_engaged_uv,
1725	.any_partition_engaged = xpc_any_partition_engaged_uv,
1726
1727	.n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv,
1728	.send_payload = xpc_send_payload_uv,
1729	.get_deliverable_payload = xpc_get_deliverable_payload_uv,
1730	.received_payload = xpc_received_payload_uv,
1731	.notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv,
1732};
1733
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1734int
1735xpc_init_uv(void)
1736{
 
 
 
1737	xpc_arch_ops = xpc_arch_ops_uv;
1738
1739	if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) {
1740		dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n",
1741			XPC_MSG_HDR_MAX_SIZE);
1742		return -E2BIG;
1743	}
1744
1745	xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0,
1746						  XPC_ACTIVATE_IRQ_NAME,
1747						  xpc_handle_activate_IRQ_uv);
1748	if (IS_ERR(xpc_activate_mq_uv))
1749		return PTR_ERR(xpc_activate_mq_uv);
1750
1751	xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0,
1752						XPC_NOTIFY_IRQ_NAME,
1753						xpc_handle_notify_IRQ_uv);
1754	if (IS_ERR(xpc_notify_mq_uv)) {
1755		xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
1756		return PTR_ERR(xpc_notify_mq_uv);
1757	}
1758
1759	return 0;
 
 
 
 
1760}
1761
1762void
1763xpc_exit_uv(void)
1764{
1765	xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
1766	xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
1767}