diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/sgi-xp/xpc_uv.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/sgi-xp/xpc_uv.c | 1767 |
1 files changed, 0 insertions, 1767 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/sgi-xp/xpc_uv.c b/ANDROID_3.4.5/drivers/misc/sgi-xp/xpc_uv.c deleted file mode 100644 index 17bbacb1..00000000 --- a/ANDROID_3.4.5/drivers/misc/sgi-xp/xpc_uv.c +++ /dev/null @@ -1,1767 +0,0 @@ -/* - * 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/err.h> -#include <linux/slab.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_GENERIC || 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_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 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) { - dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", - -mq->irq); - 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_exact_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_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); - 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); - } - 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_KERNEL); - 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; - - DBUG_ON(!spin_is_locked(&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 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, -}; - -int -xpc_init_uv(void) -{ - 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; - } - - xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, - XPC_ACTIVATE_IRQ_NAME, - xpc_handle_activate_IRQ_uv); - if (IS_ERR(xpc_activate_mq_uv)) - return PTR_ERR(xpc_activate_mq_uv); - - xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, - XPC_NOTIFY_IRQ_NAME, - xpc_handle_notify_IRQ_uv); - if (IS_ERR(xpc_notify_mq_uv)) { - xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); - return PTR_ERR(xpc_notify_mq_uv); - } - - return 0; -} - -void -xpc_exit_uv(void) -{ - xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); - xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); -} |