diff options
author | Jack Steiner <steiner@sgi.com> | 2009-04-03 01:59:10 +0200 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-03 04:05:06 +0200 |
commit | 6f2584f47474d29ce829604bfc8b56c10b352fdb (patch) | |
tree | f5b5c63c7c73785a641c995c2fe48b4c5cc726eb /drivers/misc/sgi-xp/xpc_uv.c | |
parent | sgi-gru: restructure the GRU vtop functions (diff) | |
download | linux-6f2584f47474d29ce829604bfc8b56c10b352fdb.tar.xz linux-6f2584f47474d29ce829604bfc8b56c10b352fdb.zip |
sgi-gru: add support to the GRU driver for message queue interrupts
Add support to the GRU driver for message queue interrupts.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-xp/xpc_uv.c')
-rw-r--r-- | drivers/misc/sgi-xp/xpc_uv.c | 229 |
1 files changed, 181 insertions, 48 deletions
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c index 29c0502a96b2..f7fff4727edb 100644 --- a/drivers/misc/sgi-xp/xpc_uv.c +++ b/drivers/misc/sgi-xp/xpc_uv.c @@ -31,6 +31,21 @@ #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 atomic64_t xpc_heartbeat_uv; static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); @@ -56,26 +71,52 @@ xpc_setup_partitions_sn_uv(void) 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_sn_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); if (mq->irq < 0) { dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", - mq->irq); + -mq->irq); + return mq->irq; } -#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV - int mmr_pnode; - unsigned long mmr_value; + 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) @@ -83,10 +124,8 @@ xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) else return -EINVAL; - mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); - mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; - - uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); + 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 @@ -127,7 +166,7 @@ xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) return ret; } #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV - ret = sn_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address), + ret = sn_mq_watchlist_alloc(mq->mmr_blade, (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", @@ -168,12 +207,22 @@ xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, 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; } @@ -194,14 +243,6 @@ xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, } mq->address = page_address(page); - ret = gru_create_message_queue(mq->address, mq_size); - if (ret != 0) { - dev_err(xpc_part, "gru_create_message_queue() returned " - "error=%d\n", ret); - ret = -EINVAL; - goto out_3; - } - /* enable generation of irq when GRU mq operation occurs to this mq */ ret = xpc_gru_mq_watchlist_alloc_uv(mq); if (ret != 0) @@ -214,10 +255,20 @@ xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, 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); + mq->irq, -ret); goto out_5; } + mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; + ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, + nid, 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) { @@ -237,8 +288,10 @@ out_4: out_3: free_pages((unsigned long)mq->address, pg_order); out_2: - kfree(mq); + kfree(mq->gru_mq_desc); out_1: + kfree(mq); +out_0: return ERR_PTR(ret); } @@ -268,13 +321,14 @@ xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) } static enum xp_retval -xpc_send_gru_msg(unsigned long mq_gpa, void *msg, size_t msg_size) +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(mq_gpa, msg, msg_size); + ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); if (ret == MQE_OK) { xp_ret = xpSuccess; break; @@ -421,7 +475,15 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, 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->remote_activate_mq_gpa = msg->activate_mq_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)++; @@ -498,7 +560,7 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, 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->local_notify_mq_gpa; + 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; @@ -558,9 +620,10 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id) 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->address); + msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); if (msg_hdr == NULL) break; @@ -571,14 +634,15 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id) partid); } else { part = &xpc_partitions[partid]; - if (xpc_part_ref(part)) { - xpc_handle_activate_mq_msg_uv(part, msg_hdr, - &wakeup_hb_checker); + + part_referenced = xpc_part_ref(part); + xpc_handle_activate_mq_msg_uv(part, msg_hdr, + &wakeup_hb_checker); + if (part_referenced) xpc_part_deref(part); - } } - gru_free_message(xpc_activate_mq_uv->address, msg_hdr); + gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); } if (wakeup_hb_checker) @@ -588,21 +652,73 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id) } 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 = XPC_PARTID(part); + 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? */ - return xpc_send_gru_msg(part->sn.uv.remote_activate_mq_gpa, msg, - msg_size); + 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 @@ -620,7 +736,7 @@ 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->number]; + struct xpc_partition *part = &xpc_partitions[ch->partid]; enum xp_retval ret; ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); @@ -692,7 +808,8 @@ xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, static int xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp) { - rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv->address); + rp->sn.activate_gru_mq_desc_gpa = + uv_gpa(xpc_activate_mq_uv->gru_mq_desc); return 0; } @@ -787,7 +904,8 @@ xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; - part->sn.uv.remote_activate_mq_gpa = remote_rp->sn.activate_mq_gpa; + part->sn.uv.activate_gru_mq_desc_gpa = + remote_rp->sn.activate_gru_mq_desc_gpa; /* * ??? Is it a good idea to make this conditional on what is @@ -795,7 +913,8 @@ xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, */ if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { msg.rp_gpa = uv_gpa(xpc_rsvd_page); - msg.activate_mq_gpa = xpc_rsvd_page->sn.activate_mq_gpa; + msg.activate_gru_mq_desc_gpa = + xpc_rsvd_page->sn.activate_gru_mq_desc_gpa; xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); } @@ -857,7 +976,8 @@ xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) if (head->first == NULL) head->last = NULL; } - head->n_entries++; + head->n_entries--; + BUG_ON(head->n_entries < 0); spin_unlock_irqrestore(&head->lock, irq_flags); first->next = NULL; return first; @@ -876,8 +996,7 @@ xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, else head->first = last; head->last = last; - head->n_entries--; - BUG_ON(head->n_entries < 0); + head->n_entries++; spin_unlock_irqrestore(&head->lock, irq_flags); } @@ -1037,6 +1156,12 @@ xpc_setup_msg_structures_uv(struct xpc_channel *ch) 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) { @@ -1060,7 +1185,8 @@ xpc_teardown_msg_structures_uv(struct xpc_channel *ch) DBUG_ON(!spin_is_locked(&ch->lock)); - ch_uv->remote_notify_mq_gpa = 0; + 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); @@ -1111,7 +1237,7 @@ xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) msg.ch_number = ch->number; msg.local_nentries = ch->local_nentries; msg.remote_nentries = ch->remote_nentries; - msg.local_notify_mq_gpa = uv_gpa(xpc_notify_mq_uv); + 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); } @@ -1128,11 +1254,15 @@ xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) xpc_wakeup_channel_mgr(part); } -static void +static enum xp_retval xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, - unsigned long msgqueue_pa) + unsigned long gru_mq_desc_gpa) { - ch->sn.uv.remote_notify_mq_gpa = msgqueue_pa; + 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 @@ -1339,7 +1469,8 @@ xpc_handle_notify_IRQ_uv(int irq, void *dev_id) short partid; struct xpc_partition *part; - while ((msg = gru_get_next_message(xpc_notify_mq_uv)) != NULL) { + 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) { @@ -1354,7 +1485,7 @@ xpc_handle_notify_IRQ_uv(int irq, void *dev_id) } } - gru_free_message(xpc_notify_mq_uv, msg); + gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); } return IRQ_HANDLED; @@ -1438,7 +1569,8 @@ xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, msg->hdr.msg_slot_number = msg_slot->msg_slot_number; memcpy(&msg->payload, payload, payload_size); - ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg, msg_size); + ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, + msg_size); if (ret == xpSuccess) goto out_1; @@ -1529,7 +1661,7 @@ xpc_received_payload_uv(struct xpc_channel *ch, void *payload) 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.remote_notify_mq_gpa, msg, + 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); @@ -1541,6 +1673,7 @@ int xpc_init_uv(void) { xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv; + xpc_teardown_partitions_sn = xpc_teardown_partitions_sn_uv; xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv; xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv; xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv; |