/* * 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 <linux/kernel.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/cpu.h> #include <linux/module.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/numa.h> #include <asm/uv/uv_hub.h> #if defined CONFIG_X86_64 #include <asm/uv/bios.h> #include <asm/uv/uv_irq.h> #elif defined CONFIG_IA64_SGI_UV #include <asm/sn/intr.h> #include <asm/sn/sn_sal.h> #endif #include "../sgi-gru/gru.h" #include "../sgi-gru/grukservices.h" #include "xpc.h" #if 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; }; #define sn_partition_id 0 #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_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_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_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_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); <------>} <------><------>fallthrough; <------>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_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.");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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