/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. */ /* * Cross Partition Communication (XPC) uv-based functions. * * Architecture specific implementation of common functions. * */ #include #include #include #include #include #include #include #include #include #include #include #if defined CONFIG_X86_64 #include #include #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV #include #include #endif #include "../sgi-gru/gru.h" #include "../sgi-gru/grukservices.h" #include "xpc.h" #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV struct uv_IO_APIC_route_entry { __u64 vector : 8, delivery_mode : 3, dest_mode : 1, delivery_status : 1, polarity : 1, __reserved_1 : 1, trigger : 1, mask : 1, __reserved_2 : 15, dest : 32; }; #endif static struct xpc_heartbeat_uv *xpc_heartbeat_uv; #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ XPC_ACTIVATE_MSG_SIZE_UV) #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ XPC_NOTIFY_MSG_SIZE_UV) #define XPC_NOTIFY_IRQ_NAME "xpc_notify" static int xpc_mq_node = NUMA_NO_NODE; static struct xpc_gru_mq_uv *xpc_activate_mq_uv; static struct xpc_gru_mq_uv *xpc_notify_mq_uv; static int xpc_setup_partitions_uv(void) { short partid; struct xpc_partition_uv *part_uv; for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { part_uv = &xpc_partitions[partid].sn.uv; mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); spin_lock_init(&part_uv->flags_lock); part_uv->remote_act_state = XPC_P_AS_INACTIVE; } return 0; } static void xpc_teardown_partitions_uv(void) { short partid; struct xpc_partition_uv *part_uv; unsigned long irq_flags; for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { part_uv = &xpc_partitions[partid].sn.uv; if (part_uv->cached_activate_gru_mq_desc != NULL) { mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); spin_lock_irqsave(&part_uv->flags_lock, irq_flags); part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); kfree(part_uv->cached_activate_gru_mq_desc); part_uv->cached_activate_gru_mq_desc = NULL; mutex_unlock(&part_uv-> cached_activate_gru_mq_desc_mutex); } } } static int xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) { int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); #if defined CONFIG_X86_64 mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset, UV_AFFINITY_CPU); if (mq->irq < 0) return mq->irq; mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) mq->irq = SGI_XPC_ACTIVATE; else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) mq->irq = SGI_XPC_NOTIFY; else return -EINVAL; mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); #else #error not a supported configuration #endif return 0; } static void xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) { #if defined CONFIG_X86_64 uv_teardown_irq(mq->irq); #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV int mmr_pnode; unsigned long mmr_value; mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); mmr_value = 1UL << 16; uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); #else #error not a supported configuration #endif } static int xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) { int ret; #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address), mq->order, &mq->mmr_offset); if (ret < 0) { dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", ret); return -EBUSY; } #elif defined CONFIG_X86_64 ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address), mq->order, &mq->mmr_offset); if (ret < 0) { dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " "ret=%d\n", ret); return ret; } #else #error not a supported configuration #endif mq->watchlist_num = ret; return 0; } static void xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) { int ret; int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); #if defined CONFIG_X86_64 ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num); BUG_ON(ret != BIOS_STATUS_SUCCESS); #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num); BUG_ON(ret != SALRET_OK); #else #error not a supported configuration #endif } static struct xpc_gru_mq_uv * xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, irq_handler_t irq_handler) { enum xp_retval xp_ret; int ret; int nid; int nasid; int pg_order; struct page *page; struct xpc_gru_mq_uv *mq; struct uv_IO_APIC_route_entry *mmr_value; mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); if (mq == NULL) { dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " "a xpc_gru_mq_uv structure\n"); ret = -ENOMEM; goto out_0; } mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), GFP_KERNEL); if (mq->gru_mq_desc == NULL) { dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " "a gru_message_queue_desc structure\n"); ret = -ENOMEM; goto out_1; } pg_order = get_order(mq_size); mq->order = pg_order + PAGE_SHIFT; mq_size = 1UL << mq->order; mq->mmr_blade = uv_cpu_to_blade_id(cpu); nid = cpu_to_node(cpu); page = __alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | __GFP_THISNODE, pg_order); if (page == NULL) { dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); ret = -ENOMEM; goto out_2; } mq->address = page_address(page); /* enable generation of irq when GRU mq operation occurs to this mq */ ret = xpc_gru_mq_watchlist_alloc_uv(mq); if (ret != 0) goto out_3; ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); if (ret != 0) goto out_4; ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); if (ret != 0) { dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", mq->irq, -ret); goto out_5; } nasid = UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpu)); mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, nasid, mmr_value->vector, mmr_value->dest); if (ret != 0) { dev_err(xpc_part, "gru_create_message_queue() returned " "error=%d\n", ret); ret = -EINVAL; goto out_6; } /* allow other partitions to access this GRU mq */ xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); if (xp_ret != xpSuccess) { ret = -EACCES; goto out_6; } return mq; /* something went wrong */ out_6: free_irq(mq->irq, NULL); out_5: xpc_release_gru_mq_irq_uv(mq); out_4: xpc_gru_mq_watchlist_free_uv(mq); out_3: free_pages((unsigned long)mq->address, pg_order); out_2: kfree(mq->gru_mq_desc); out_1: kfree(mq); out_0: return ERR_PTR(ret); } static void xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) { unsigned int mq_size; int pg_order; int ret; /* disallow other partitions to access GRU mq */ mq_size = 1UL << mq->order; ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); BUG_ON(ret != xpSuccess); /* unregister irq handler and release mq irq/vector mapping */ free_irq(mq->irq, NULL); xpc_release_gru_mq_irq_uv(mq); /* disable generation of irq when GRU mq op occurs to this mq */ xpc_gru_mq_watchlist_free_uv(mq); pg_order = mq->order - PAGE_SHIFT; free_pages((unsigned long)mq->address, pg_order); kfree(mq); } static enum xp_retval xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, size_t msg_size) { enum xp_retval xp_ret; int ret; while (1) { ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); if (ret == MQE_OK) { xp_ret = xpSuccess; break; } if (ret == MQE_QUEUE_FULL) { dev_dbg(xpc_chan, "gru_send_message_gpa() returned " "error=MQE_QUEUE_FULL\n"); /* !!! handle QLimit reached; delay & try again */ /* ??? Do we add a limit to the number of retries? */ (void)msleep_interruptible(10); } else if (ret == MQE_CONGESTION) { dev_dbg(xpc_chan, "gru_send_message_gpa() returned " "error=MQE_CONGESTION\n"); /* !!! handle LB Overflow; simply try again */ /* ??? Do we add a limit to the number of retries? */ } else { /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ dev_err(xpc_chan, "gru_send_message_gpa() returned " "error=%d\n", ret); xp_ret = xpGruSendMqError; break; } } return xp_ret; } static void xpc_process_activate_IRQ_rcvd_uv(void) { unsigned long irq_flags; short partid; struct xpc_partition *part; u8 act_state_req; DBUG_ON(xpc_activate_IRQ_rcvd == 0); spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { part = &xpc_partitions[partid]; if (part->sn.uv.act_state_req == 0) continue; xpc_activate_IRQ_rcvd--; BUG_ON(xpc_activate_IRQ_rcvd < 0); act_state_req = part->sn.uv.act_state_req; part->sn.uv.act_state_req = 0; spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { if (part->act_state == XPC_P_AS_INACTIVE) xpc_activate_partition(part); else if (part->act_state == XPC_P_AS_DEACTIVATING) XPC_DEACTIVATE_PARTITION(part, xpReactivating); } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { if (part->act_state == XPC_P_AS_INACTIVE) xpc_activate_partition(part); else XPC_DEACTIVATE_PARTITION(part, xpReactivating); } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); } else { BUG(); } spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (xpc_activate_IRQ_rcvd == 0) break; } spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); } static void xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, struct xpc_activate_mq_msghdr_uv *msg_hdr, int part_setup, int *wakeup_hb_checker) { unsigned long irq_flags; struct xpc_partition_uv *part_uv = &part->sn.uv; struct xpc_openclose_args *args; part_uv->remote_act_state = msg_hdr->act_state; switch (msg_hdr->type) { case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: /* syncing of remote_act_state was just done above */ break; case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { struct xpc_activate_mq_msg_activate_req_uv *msg; /* * ??? Do we deal here with ts_jiffies being different * ??? if act_state != XPC_P_AS_INACTIVE instead of * ??? below? */ msg = container_of(msg_hdr, struct xpc_activate_mq_msg_activate_req_uv, hdr); spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (part_uv->act_state_req == 0) xpc_activate_IRQ_rcvd++; part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; part_uv->heartbeat_gpa = msg->heartbeat_gpa; if (msg->activate_gru_mq_desc_gpa != part_uv->activate_gru_mq_desc_gpa) { spin_lock(&part_uv->flags_lock); part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; spin_unlock(&part_uv->flags_lock); part_uv->activate_gru_mq_desc_gpa = msg->activate_gru_mq_desc_gpa; } spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); (*wakeup_hb_checker)++; break; } case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { struct xpc_activate_mq_msg_deactivate_req_uv *msg; msg = container_of(msg_hdr, struct xpc_activate_mq_msg_deactivate_req_uv, hdr); spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (part_uv->act_state_req == 0) xpc_activate_IRQ_rcvd++; part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; part_uv->reason = msg->reason; spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); (*wakeup_hb_checker)++; return; } case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; if (!part_setup) break; msg = container_of(msg_hdr, struct xpc_activate_mq_msg_chctl_closerequest_uv, hdr); args = &part->remote_openclose_args[msg->ch_number]; args->reason = msg->reason; spin_lock_irqsave(&part->chctl_lock, irq_flags); part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); xpc_wakeup_channel_mgr(part); break; } case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { struct xpc_activate_mq_msg_chctl_closereply_uv *msg; if (!part_setup) break; msg = container_of(msg_hdr, struct xpc_activate_mq_msg_chctl_closereply_uv, hdr); spin_lock_irqsave(&part->chctl_lock, irq_flags); part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); xpc_wakeup_channel_mgr(part); break; } case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; if (!part_setup) break; msg = container_of(msg_hdr, struct xpc_activate_mq_msg_chctl_openrequest_uv, hdr); args = &part->remote_openclose_args[msg->ch_number]; args->entry_size = msg->entry_size; args->local_nentries = msg->local_nentries; spin_lock_irqsave(&part->chctl_lock, irq_flags); part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); xpc_wakeup_channel_mgr(part); break; } case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { struct xpc_activate_mq_msg_chctl_openreply_uv *msg; if (!part_setup) break; msg = container_of(msg_hdr, struct xpc_activate_mq_msg_chctl_openreply_uv, hdr); args = &part->remote_openclose_args[msg->ch_number]; args->remote_nentries = msg->remote_nentries; args->local_nentries = msg->local_nentries; args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; spin_lock_irqsave(&part->chctl_lock, irq_flags); part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); xpc_wakeup_channel_mgr(part); break; } case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; if (!part_setup) break; msg = container_of(msg_hdr, struct xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); spin_lock_irqsave(&part->chctl_lock, irq_flags); part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); xpc_wakeup_channel_mgr(part); } /* fall through */ case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: spin_lock_irqsave(&part_uv->flags_lock, irq_flags); part_uv->flags |= XPC_P_ENGAGED_UV; spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); break; case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: spin_lock_irqsave(&part_uv->flags_lock, irq_flags); part_uv->flags &= ~XPC_P_ENGAGED_UV; spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); break; default: dev_err(xpc_part, "received unknown activate_mq msg type=%d " "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); /* get hb checker to deactivate from the remote partition */ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (part_uv->act_state_req == 0) xpc_activate_IRQ_rcvd++; part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; part_uv->reason = xpBadMsgType; spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); (*wakeup_hb_checker)++; return; } if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && part->remote_rp_ts_jiffies != 0) { /* * ??? Does what we do here need to be sensitive to * ??? act_state or remote_act_state? */ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (part_uv->act_state_req == 0) xpc_activate_IRQ_rcvd++; part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); (*wakeup_hb_checker)++; } } static irqreturn_t xpc_handle_activate_IRQ_uv(int irq, void *dev_id) { struct xpc_activate_mq_msghdr_uv *msg_hdr; short partid; struct xpc_partition *part; int wakeup_hb_checker = 0; int part_referenced; while (1) { msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); if (msg_hdr == NULL) break; partid = msg_hdr->partid; if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " "received invalid partid=0x%x in message\n", partid); } else { part = &xpc_partitions[partid]; part_referenced = xpc_part_ref(part); xpc_handle_activate_mq_msg_uv(part, msg_hdr, part_referenced, &wakeup_hb_checker); if (part_referenced) xpc_part_deref(part); } gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); } if (wakeup_hb_checker) wake_up_interruptible(&xpc_activate_IRQ_wq); return IRQ_HANDLED; } static enum xp_retval xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, unsigned long gru_mq_desc_gpa) { enum xp_retval ret; ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, sizeof(struct gru_message_queue_desc)); if (ret == xpSuccess) gru_mq_desc->mq = NULL; return ret; } static enum xp_retval xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, int msg_type) { struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; struct xpc_partition_uv *part_uv = &part->sn.uv; struct gru_message_queue_desc *gru_mq_desc; unsigned long irq_flags; enum xp_retval ret; DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); msg_hdr->type = msg_type; msg_hdr->partid = xp_partition_id; msg_hdr->act_state = part->act_state; msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); again: if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { gru_mq_desc = part_uv->cached_activate_gru_mq_desc; if (gru_mq_desc == NULL) { gru_mq_desc = kmalloc(sizeof(struct gru_message_queue_desc), GFP_ATOMIC); if (gru_mq_desc == NULL) { ret = xpNoMemory; goto done; } part_uv->cached_activate_gru_mq_desc = gru_mq_desc; } ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, part_uv-> activate_gru_mq_desc_gpa); if (ret != xpSuccess) goto done; spin_lock_irqsave(&part_uv->flags_lock, irq_flags); part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); } /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, msg_size); if (ret != xpSuccess) { smp_rmb(); /* ensure a fresh copy of part_uv->flags */ if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) goto again; } done: mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); return ret; } static void xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, size_t msg_size, int msg_type) { enum xp_retval ret; ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); if (unlikely(ret != xpSuccess)) XPC_DEACTIVATE_PARTITION(part, ret); } static void xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, void *msg, size_t msg_size, int msg_type) { struct xpc_partition *part = &xpc_partitions[ch->partid]; enum xp_retval ret; ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); if (unlikely(ret != xpSuccess)) { if (irq_flags != NULL) spin_unlock_irqrestore(&ch->lock, *irq_flags); XPC_DEACTIVATE_PARTITION(part, ret); if (irq_flags != NULL) spin_lock_irqsave(&ch->lock, *irq_flags); } } static void xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) { unsigned long irq_flags; struct xpc_partition_uv *part_uv = &part->sn.uv; /* * !!! Make our side think that the remote partition sent an activate * !!! mq message our way by doing what the activate IRQ handler would * !!! do had one really been sent. */ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (part_uv->act_state_req == 0) xpc_activate_IRQ_rcvd++; part_uv->act_state_req = act_state_req; spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); wake_up_interruptible(&xpc_activate_IRQ_wq); } static enum xp_retval xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, size_t *len) { s64 status; enum xp_retval ret; #if defined CONFIG_X86_64 status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, (u64 *)len); if (status == BIOS_STATUS_SUCCESS) ret = xpSuccess; else if (status == BIOS_STATUS_MORE_PASSES) ret = xpNeedMoreInfo; else ret = xpBiosError; #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); if (status == SALRET_OK) ret = xpSuccess; else if (status == SALRET_MORE_PASSES) ret = xpNeedMoreInfo; else ret = xpSalError; #else #error not a supported configuration #endif return ret; } static int xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp) { xpc_heartbeat_uv = &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat; rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv); rp->sn.uv.activate_gru_mq_desc_gpa = uv_gpa(xpc_activate_mq_uv->gru_mq_desc); return 0; } static void xpc_allow_hb_uv(short partid) { } static void xpc_disallow_hb_uv(short partid) { } static void xpc_disallow_all_hbs_uv(void) { } static void xpc_increment_heartbeat_uv(void) { xpc_heartbeat_uv->value++; } static void xpc_offline_heartbeat_uv(void) { xpc_increment_heartbeat_uv(); xpc_heartbeat_uv->offline = 1; } static void xpc_online_heartbeat_uv(void) { xpc_increment_heartbeat_uv(); xpc_heartbeat_uv->offline = 0; } static void xpc_heartbeat_init_uv(void) { xpc_heartbeat_uv->value = 1; xpc_heartbeat_uv->offline = 0; } static void xpc_heartbeat_exit_uv(void) { xpc_offline_heartbeat_uv(); } static enum xp_retval xpc_get_remote_heartbeat_uv(struct xpc_partition *part) { struct xpc_partition_uv *part_uv = &part->sn.uv; enum xp_retval ret; ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat), part_uv->heartbeat_gpa, sizeof(struct xpc_heartbeat_uv)); if (ret != xpSuccess) return ret; if (part_uv->cached_heartbeat.value == part->last_heartbeat && !part_uv->cached_heartbeat.offline) { ret = xpNoHeartbeat; } else { part->last_heartbeat = part_uv->cached_heartbeat.value; } return ret; } static void xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, unsigned long remote_rp_gpa, int nasid) { short partid = remote_rp->SAL_partid; struct xpc_partition *part = &xpc_partitions[partid]; struct xpc_activate_mq_msg_activate_req_uv msg; part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa; part->sn.uv.activate_gru_mq_desc_gpa = remote_rp->sn.uv.activate_gru_mq_desc_gpa; /* * ??? Is it a good idea to make this conditional on what is * ??? potentially stale state information? */ if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { msg.rp_gpa = uv_gpa(xpc_rsvd_page); msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa; msg.activate_gru_mq_desc_gpa = xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa; xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); } if (part->act_state == XPC_P_AS_INACTIVE) xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); } static void xpc_request_partition_reactivation_uv(struct xpc_partition *part) { xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); } static void xpc_request_partition_deactivation_uv(struct xpc_partition *part) { struct xpc_activate_mq_msg_deactivate_req_uv msg; /* * ??? Is it a good idea to make this conditional on what is * ??? potentially stale state information? */ if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { msg.reason = part->reason; xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); } } static void xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) { /* nothing needs to be done */ return; } static void xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) { head->first = NULL; head->last = NULL; spin_lock_init(&head->lock); head->n_entries = 0; } static void * xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) { unsigned long irq_flags; struct xpc_fifo_entry_uv *first; spin_lock_irqsave(&head->lock, irq_flags); first = head->first; if (head->first != NULL) { head->first = first->next; if (head->first == NULL) head->last = NULL; head->n_entries--; BUG_ON(head->n_entries < 0); first->next = NULL; } spin_unlock_irqrestore(&head->lock, irq_flags); return first; } static void xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, struct xpc_fifo_entry_uv *last) { unsigned long irq_flags; last->next = NULL; spin_lock_irqsave(&head->lock, irq_flags); if (head->last != NULL) head->last->next = last; else head->first = last; head->last = last; head->n_entries++; spin_unlock_irqrestore(&head->lock, irq_flags); } static int xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) { return head->n_entries; } /* * Setup the channel structures that are uv specific. */ static enum xp_retval xpc_setup_ch_structures_uv(struct xpc_partition *part) { struct xpc_channel_uv *ch_uv; int ch_number; for (ch_number = 0; ch_number < part->nchannels; ch_number++) { ch_uv = &part->channels[ch_number].sn.uv; xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); xpc_init_fifo_uv(&ch_uv->recv_msg_list); } return xpSuccess; } /* * Teardown the channel structures that are uv specific. */ static void xpc_teardown_ch_structures_uv(struct xpc_partition *part) { /* nothing needs to be done */ return; } static enum xp_retval xpc_make_first_contact_uv(struct xpc_partition *part) { struct xpc_activate_mq_msg_uv msg; /* * We send a sync msg to get the remote partition's remote_act_state * updated to our current act_state which at this point should * be XPC_P_AS_ACTIVATING. */ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) || (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) { dev_dbg(xpc_part, "waiting to make first contact with " "partition %d\n", XPC_PARTID(part)); /* wait a 1/4 of a second or so */ (void)msleep_interruptible(250); if (part->act_state == XPC_P_AS_DEACTIVATING) return part->reason; } return xpSuccess; } static u64 xpc_get_chctl_all_flags_uv(struct xpc_partition *part) { unsigned long irq_flags; union xpc_channel_ctl_flags chctl; spin_lock_irqsave(&part->chctl_lock, irq_flags); chctl = part->chctl; if (chctl.all_flags != 0) part->chctl.all_flags = 0; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); return chctl.all_flags; } static enum xp_retval xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) { struct xpc_channel_uv *ch_uv = &ch->sn.uv; struct xpc_send_msg_slot_uv *msg_slot; unsigned long irq_flags; int nentries; int entry; size_t nbytes; for (nentries = ch->local_nentries; nentries > 0; nentries--) { nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); if (ch_uv->send_msg_slots == NULL) continue; for (entry = 0; entry < nentries; entry++) { msg_slot = &ch_uv->send_msg_slots[entry]; msg_slot->msg_slot_number = entry; xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, &msg_slot->next); } spin_lock_irqsave(&ch->lock, irq_flags); if (nentries < ch->local_nentries) ch->local_nentries = nentries; spin_unlock_irqrestore(&ch->lock, irq_flags); return xpSuccess; } return xpNoMemory; } static enum xp_retval xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) { struct xpc_channel_uv *ch_uv = &ch->sn.uv; struct xpc_notify_mq_msg_uv *msg_slot; unsigned long irq_flags; int nentries; int entry; size_t nbytes; for (nentries = ch->remote_nentries; nentries > 0; nentries--) { nbytes = nentries * ch->entry_size; ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); if (ch_uv->recv_msg_slots == NULL) continue; for (entry = 0; entry < nentries; entry++) { msg_slot = ch_uv->recv_msg_slots + entry * ch->entry_size; msg_slot->hdr.msg_slot_number = entry; } spin_lock_irqsave(&ch->lock, irq_flags); if (nentries < ch->remote_nentries) ch->remote_nentries = nentries; spin_unlock_irqrestore(&ch->lock, irq_flags); return xpSuccess; } return xpNoMemory; } /* * Allocate msg_slots associated with the channel. */ static enum xp_retval xpc_setup_msg_structures_uv(struct xpc_channel *ch) { static enum xp_retval ret; struct xpc_channel_uv *ch_uv = &ch->sn.uv; DBUG_ON(ch->flags & XPC_C_SETUP); ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct gru_message_queue_desc), GFP_KERNEL); if (ch_uv->cached_notify_gru_mq_desc == NULL) return xpNoMemory; ret = xpc_allocate_send_msg_slot_uv(ch); if (ret == xpSuccess) { ret = xpc_allocate_recv_msg_slot_uv(ch); if (ret != xpSuccess) { kfree(ch_uv->send_msg_slots); xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); } } return ret; } /* * Free up msg_slots and clear other stuff that were setup for the specified * channel. */ static void xpc_teardown_msg_structures_uv(struct xpc_channel *ch) { struct xpc_channel_uv *ch_uv = &ch->sn.uv; lockdep_assert_held(&ch->lock); kfree(ch_uv->cached_notify_gru_mq_desc); ch_uv->cached_notify_gru_mq_desc = NULL; if (ch->flags & XPC_C_SETUP) { xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); kfree(ch_uv->send_msg_slots); xpc_init_fifo_uv(&ch_uv->recv_msg_list); kfree(ch_uv->recv_msg_slots); } } static void xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_activate_mq_msg_chctl_closerequest_uv msg; msg.ch_number = ch->number; msg.reason = ch->reason; xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); } static void xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_activate_mq_msg_chctl_closereply_uv msg; msg.ch_number = ch->number; xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); } static void xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_activate_mq_msg_chctl_openrequest_uv msg; msg.ch_number = ch->number; msg.entry_size = ch->entry_size; msg.local_nentries = ch->local_nentries; xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); } static void xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_activate_mq_msg_chctl_openreply_uv msg; msg.ch_number = ch->number; msg.local_nentries = ch->local_nentries; msg.remote_nentries = ch->remote_nentries; msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc); xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); } static void xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; msg.ch_number = ch->number; xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); } static void xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) { unsigned long irq_flags; spin_lock_irqsave(&part->chctl_lock, irq_flags); part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; spin_unlock_irqrestore(&part->chctl_lock, irq_flags); xpc_wakeup_channel_mgr(part); } static enum xp_retval xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, unsigned long gru_mq_desc_gpa) { struct xpc_channel_uv *ch_uv = &ch->sn.uv; DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, gru_mq_desc_gpa); } static void xpc_indicate_partition_engaged_uv(struct xpc_partition *part) { struct xpc_activate_mq_msg_uv msg; xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); } static void xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) { struct xpc_activate_mq_msg_uv msg; xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); } static void xpc_assume_partition_disengaged_uv(short partid) { struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; unsigned long irq_flags; spin_lock_irqsave(&part_uv->flags_lock, irq_flags); part_uv->flags &= ~XPC_P_ENGAGED_UV; spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); } static int xpc_partition_engaged_uv(short partid) { return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; } static int xpc_any_partition_engaged_uv(void) { struct xpc_partition_uv *part_uv; short partid; for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { part_uv = &xpc_partitions[partid].sn.uv; if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) return 1; } return 0; } static enum xp_retval xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, struct xpc_send_msg_slot_uv **address_of_msg_slot) { enum xp_retval ret; struct xpc_send_msg_slot_uv *msg_slot; struct xpc_fifo_entry_uv *entry; while (1) { entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); if (entry != NULL) break; if (flags & XPC_NOWAIT) return xpNoWait; ret = xpc_allocate_msg_wait(ch); if (ret != xpInterrupted && ret != xpTimeout) return ret; } msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); *address_of_msg_slot = msg_slot; return xpSuccess; } static void xpc_free_msg_slot_uv(struct xpc_channel *ch, struct xpc_send_msg_slot_uv *msg_slot) { xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); /* wakeup anyone waiting for a free msg slot */ if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) wake_up(&ch->msg_allocate_wq); } static void xpc_notify_sender_uv(struct xpc_channel *ch, struct xpc_send_msg_slot_uv *msg_slot, enum xp_retval reason) { xpc_notify_func func = msg_slot->func; if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { atomic_dec(&ch->n_to_notify); dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, msg_slot->msg_slot_number, ch->partid, ch->number); func(reason, ch->partid, ch->number, msg_slot->key); dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, msg_slot->msg_slot_number, ch->partid, ch->number); } } static void xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, struct xpc_notify_mq_msg_uv *msg) { struct xpc_send_msg_slot_uv *msg_slot; int entry = msg->hdr.msg_slot_number % ch->local_nentries; msg_slot = &ch->sn.uv.send_msg_slots[entry]; BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); msg_slot->msg_slot_number += ch->local_nentries; if (msg_slot->func != NULL) xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); xpc_free_msg_slot_uv(ch, msg_slot); } static void xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, struct xpc_notify_mq_msg_uv *msg) { struct xpc_partition_uv *part_uv = &part->sn.uv; struct xpc_channel *ch; struct xpc_channel_uv *ch_uv; struct xpc_notify_mq_msg_uv *msg_slot; unsigned long irq_flags; int ch_number = msg->hdr.ch_number; if (unlikely(ch_number >= part->nchannels)) { dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " "channel number=0x%x in message from partid=%d\n", ch_number, XPC_PARTID(part)); /* get hb checker to deactivate from the remote partition */ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); if (part_uv->act_state_req == 0) xpc_activate_IRQ_rcvd++; part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; part_uv->reason = xpBadChannelNumber; spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); wake_up_interruptible(&xpc_activate_IRQ_wq); return; } ch = &part->channels[ch_number]; xpc_msgqueue_ref(ch); if (!(ch->flags & XPC_C_CONNECTED)) { xpc_msgqueue_deref(ch); return; } /* see if we're really dealing with an ACK for a previously sent msg */ if (msg->hdr.size == 0) { xpc_handle_notify_mq_ack_uv(ch, msg); xpc_msgqueue_deref(ch); return; } /* we're dealing with a normal message sent via the notify_mq */ ch_uv = &ch->sn.uv; msg_slot = ch_uv->recv_msg_slots + (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; BUG_ON(msg_slot->hdr.size != 0); memcpy(msg_slot, msg, msg->hdr.size); xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { /* * If there is an existing idle kthread get it to deliver * the payload, otherwise we'll have to get the channel mgr * for this partition to create a kthread to do the delivery. */ if (atomic_read(&ch->kthreads_idle) > 0) wake_up_nr(&ch->idle_wq, 1); else xpc_send_chctl_local_msgrequest_uv(part, ch->number); } xpc_msgqueue_deref(ch); } static irqreturn_t xpc_handle_notify_IRQ_uv(int irq, void *dev_id) { struct xpc_notify_mq_msg_uv *msg; short partid; struct xpc_partition *part; while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != NULL) { partid = msg->hdr.partid; if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " "invalid partid=0x%x in message\n", partid); } else { part = &xpc_partitions[partid]; if (xpc_part_ref(part)) { xpc_handle_notify_mq_msg_uv(part, msg); xpc_part_deref(part); } } gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); } return IRQ_HANDLED; } static int xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) { return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); } static void xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) { struct xpc_channel *ch = &part->channels[ch_number]; int ndeliverable_payloads; xpc_msgqueue_ref(ch); ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); if (ndeliverable_payloads > 0 && (ch->flags & XPC_C_CONNECTED) && (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { xpc_activate_kthreads(ch, ndeliverable_payloads); } xpc_msgqueue_deref(ch); } static enum xp_retval xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, u16 payload_size, u8 notify_type, xpc_notify_func func, void *key) { enum xp_retval ret = xpSuccess; struct xpc_send_msg_slot_uv *msg_slot = NULL; struct xpc_notify_mq_msg_uv *msg; u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; size_t msg_size; DBUG_ON(notify_type != XPC_N_CALL); msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; if (msg_size > ch->entry_size) return xpPayloadTooBig; xpc_msgqueue_ref(ch); if (ch->flags & XPC_C_DISCONNECTING) { ret = ch->reason; goto out_1; } if (!(ch->flags & XPC_C_CONNECTED)) { ret = xpNotConnected; goto out_1; } ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); if (ret != xpSuccess) goto out_1; if (func != NULL) { atomic_inc(&ch->n_to_notify); msg_slot->key = key; smp_wmb(); /* a non-NULL func must hit memory after the key */ msg_slot->func = func; if (ch->flags & XPC_C_DISCONNECTING) { ret = ch->reason; goto out_2; } } msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; msg->hdr.partid = xp_partition_id; msg->hdr.ch_number = ch->number; msg->hdr.size = msg_size; msg->hdr.msg_slot_number = msg_slot->msg_slot_number; memcpy(&msg->payload, payload, payload_size); ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, msg_size); if (ret == xpSuccess) goto out_1; XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); out_2: if (func != NULL) { /* * Try to NULL the msg_slot's func field. If we fail, then * xpc_notify_senders_of_disconnect_uv() beat us to it, in which * case we need to pretend we succeeded to send the message * since the user will get a callout for the disconnect error * by xpc_notify_senders_of_disconnect_uv(), and to also get an * error returned here will confuse them. Additionally, since * in this case the channel is being disconnected we don't need * to put the the msg_slot back on the free list. */ if (cmpxchg(&msg_slot->func, func, NULL) != func) { ret = xpSuccess; goto out_1; } msg_slot->key = NULL; atomic_dec(&ch->n_to_notify); } xpc_free_msg_slot_uv(ch, msg_slot); out_1: xpc_msgqueue_deref(ch); return ret; } /* * Tell the callers of xpc_send_notify() that the status of their payloads * is unknown because the channel is now disconnecting. * * We don't worry about putting these msg_slots on the free list since the * msg_slots themselves are about to be kfree'd. */ static void xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) { struct xpc_send_msg_slot_uv *msg_slot; int entry; DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); for (entry = 0; entry < ch->local_nentries; entry++) { if (atomic_read(&ch->n_to_notify) == 0) break; msg_slot = &ch->sn.uv.send_msg_slots[entry]; if (msg_slot->func != NULL) xpc_notify_sender_uv(ch, msg_slot, ch->reason); } } /* * Get the next deliverable message's payload. */ static void * xpc_get_deliverable_payload_uv(struct xpc_channel *ch) { struct xpc_fifo_entry_uv *entry; struct xpc_notify_mq_msg_uv *msg; void *payload = NULL; if (!(ch->flags & XPC_C_DISCONNECTING)) { entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); if (entry != NULL) { msg = container_of(entry, struct xpc_notify_mq_msg_uv, hdr.u.next); payload = &msg->payload; } } return payload; } static void xpc_received_payload_uv(struct xpc_channel *ch, void *payload) { struct xpc_notify_mq_msg_uv *msg; enum xp_retval ret; msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); /* return an ACK to the sender of this message */ msg->hdr.partid = xp_partition_id; msg->hdr.size = 0; /* size of zero indicates this is an ACK */ ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, sizeof(struct xpc_notify_mq_msghdr_uv)); if (ret != xpSuccess) XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); } static const struct xpc_arch_operations xpc_arch_ops_uv = { .setup_partitions = xpc_setup_partitions_uv, .teardown_partitions = xpc_teardown_partitions_uv, .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv, .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv, .setup_rsvd_page = xpc_setup_rsvd_page_uv, .allow_hb = xpc_allow_hb_uv, .disallow_hb = xpc_disallow_hb_uv, .disallow_all_hbs = xpc_disallow_all_hbs_uv, .increment_heartbeat = xpc_increment_heartbeat_uv, .offline_heartbeat = xpc_offline_heartbeat_uv, .online_heartbeat = xpc_online_heartbeat_uv, .heartbeat_init = xpc_heartbeat_init_uv, .heartbeat_exit = xpc_heartbeat_exit_uv, .get_remote_heartbeat = xpc_get_remote_heartbeat_uv, .request_partition_activation = xpc_request_partition_activation_uv, .request_partition_reactivation = xpc_request_partition_reactivation_uv, .request_partition_deactivation = xpc_request_partition_deactivation_uv, .cancel_partition_deactivation_request = xpc_cancel_partition_deactivation_request_uv, .setup_ch_structures = xpc_setup_ch_structures_uv, .teardown_ch_structures = xpc_teardown_ch_structures_uv, .make_first_contact = xpc_make_first_contact_uv, .get_chctl_all_flags = xpc_get_chctl_all_flags_uv, .send_chctl_closerequest = xpc_send_chctl_closerequest_uv, .send_chctl_closereply = xpc_send_chctl_closereply_uv, .send_chctl_openrequest = xpc_send_chctl_openrequest_uv, .send_chctl_openreply = xpc_send_chctl_openreply_uv, .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv, .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv, .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv, .setup_msg_structures = xpc_setup_msg_structures_uv, .teardown_msg_structures = xpc_teardown_msg_structures_uv, .indicate_partition_engaged = xpc_indicate_partition_engaged_uv, .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv, .assume_partition_disengaged = xpc_assume_partition_disengaged_uv, .partition_engaged = xpc_partition_engaged_uv, .any_partition_engaged = xpc_any_partition_engaged_uv, .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv, .send_payload = xpc_send_payload_uv, .get_deliverable_payload = xpc_get_deliverable_payload_uv, .received_payload = xpc_received_payload_uv, .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv, }; static int xpc_init_mq_node(int nid) { int cpu; get_online_cpus(); for_each_cpu(cpu, cpumask_of_node(nid)) { xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, nid, XPC_ACTIVATE_IRQ_NAME, xpc_handle_activate_IRQ_uv); if (!IS_ERR(xpc_activate_mq_uv)) break; } if (IS_ERR(xpc_activate_mq_uv)) { put_online_cpus(); return PTR_ERR(xpc_activate_mq_uv); } for_each_cpu(cpu, cpumask_of_node(nid)) { xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, nid, XPC_NOTIFY_IRQ_NAME, xpc_handle_notify_IRQ_uv); if (!IS_ERR(xpc_notify_mq_uv)) break; } if (IS_ERR(xpc_notify_mq_uv)) { xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); put_online_cpus(); return PTR_ERR(xpc_notify_mq_uv); } put_online_cpus(); return 0; } int xpc_init_uv(void) { int nid; int ret = 0; xpc_arch_ops = xpc_arch_ops_uv; if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", XPC_MSG_HDR_MAX_SIZE); return -E2BIG; } if (xpc_mq_node < 0) for_each_online_node(nid) { ret = xpc_init_mq_node(nid); if (!ret) break; } else ret = xpc_init_mq_node(xpc_mq_node); if (ret < 0) dev_err(xpc_part, "xpc_init_mq_node() returned error=%d\n", -ret); return ret; } void xpc_exit_uv(void) { xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); } module_param(xpc_mq_node, int, 0); MODULE_PARM_DESC(xpc_mq_node, "Node number on which to allocate message queues.");