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From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
	akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
	Cliff Wickman <cpw@sgi.com>, Ingo Molnar <mingo@elte.hu>
Subject: [63/71] x86: Fix UV BAU for non-consecutive nasids
Date: Thu, 19 May 2011 11:05:31 -0700	[thread overview]
Message-ID: <20110519180600.296107652@clark.kroah.org> (raw)
In-Reply-To: <20110519180626.GA16555@kroah.com>

2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Cliff Wickman <cpw@sgi.com>

commit 77ed23f8d995a01cd8101d84351b567bf5177a30 upstream.

This is a fix for the SGI Altix-UV Broadcast Assist Unit code,
which is used for TLB flushing.

Certain hardware configurations (that customers are ordering)
cause nasids (numa address space id's) to be non-consecutive.
Specifically, once you have more than 4 blades in a IRU
(Individual Rack Unit - or 1/2 rack) but less than the maximum
of 16, the nasid numbering becomes non-consecutive.  This
currently results in a 'catastrophic error' (CATERR) detected by
the firmware during OS boot.  The BAU is generating an 'INTD'
request that is targeting a non-existent nasid value. Such
configurations may also occur when a blade is configured off
because of hardware errors. (There is one UV hub per blade.)

This patch is required to support such configurations.

The problem with the tlb_uv.c code is that is using the
consecutive hub numbers as indices to the BAU distribution bit
map. These are simply the ordinal position of the hub or blade
within its partition.  It should be using physical node numbers
(pnodes), which correspond to the physical nasid values. Use of
the hub number only works as long as the nasids in the partition
are consecutive and increase with a stride of 1.

This patch changes the index to be the pnode number, thus
allowing nasids to be non-consecutive.
It also provides a table in local memory for each cpu to
translate target cpu number to target pnode and nasid.
And it improves naming to properly reflect 'node' and 'uvhub'
versus 'nasid'.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/E1QJmxX-0002Mz-Fk@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 arch/x86/include/asm/uv/uv_bau.h |   17 +++++--
 arch/x86/platform/uv/tlb_uv.c    |   92 ++++++++++++++++++++++++++-------------
 2 files changed, 76 insertions(+), 33 deletions(-)

--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -94,6 +94,8 @@
 /* after this # consecutive successes, bump up the throttle if it was lowered */
 #define COMPLETE_THRESHOLD 5
 
+#define UV_LB_SUBNODEID 0x10
+
 /*
  * number of entries in the destination side payload queue
  */
@@ -124,7 +126,7 @@
  * The distribution specification (32 bytes) is interpreted as a 256-bit
  * distribution vector. Adjacent bits correspond to consecutive even numbered
  * nodeIDs. The result of adding the index of a given bit to the 15-bit
- * 'base_dest_nodeid' field of the header corresponds to the
+ * 'base_dest_nasid' field of the header corresponds to the
  * destination nodeID associated with that specified bit.
  */
 struct bau_target_uvhubmask {
@@ -176,7 +178,7 @@ struct bau_msg_payload {
 struct bau_msg_header {
 	unsigned int dest_subnodeid:6;	/* must be 0x10, for the LB */
 	/* bits 5:0 */
-	unsigned int base_dest_nodeid:15; /* nasid of the */
+	unsigned int base_dest_nasid:15; /* nasid of the */
 	/* bits 20:6 */			  /* first bit in uvhub map */
 	unsigned int command:8;	/* message type */
 	/* bits 28:21 */
@@ -378,6 +380,10 @@ struct ptc_stats {
 	unsigned long d_rcanceled; /* number of messages canceled by resets */
 };
 
+struct hub_and_pnode {
+	short uvhub;
+	short pnode;
+};
 /*
  * one per-cpu; to locate the software tables
  */
@@ -399,10 +405,12 @@ struct bau_control {
 	int baudisabled;
 	int set_bau_off;
 	short cpu;
+	short osnode;
 	short uvhub_cpu;
 	short uvhub;
 	short cpus_in_socket;
 	short cpus_in_uvhub;
+	short partition_base_pnode;
 	unsigned short message_number;
 	unsigned short uvhub_quiesce;
 	short socket_acknowledge_count[DEST_Q_SIZE];
@@ -422,15 +430,16 @@ struct bau_control {
 	int congested_period;
 	cycles_t period_time;
 	long period_requests;
+	struct hub_and_pnode *target_hub_and_pnode;
 };
 
 static inline int bau_uvhub_isset(int uvhub, struct bau_target_uvhubmask *dstp)
 {
 	return constant_test_bit(uvhub, &dstp->bits[0]);
 }
-static inline void bau_uvhub_set(int uvhub, struct bau_target_uvhubmask *dstp)
+static inline void bau_uvhub_set(int pnode, struct bau_target_uvhubmask *dstp)
 {
-	__set_bit(uvhub, &dstp->bits[0]);
+	__set_bit(pnode, &dstp->bits[0]);
 }
 static inline void bau_uvhubs_clear(struct bau_target_uvhubmask *dstp,
 				    int nbits)
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -698,16 +698,17 @@ const struct cpumask *uv_flush_tlb_other
 					  struct mm_struct *mm,
 					  unsigned long va, unsigned int cpu)
 {
-	int tcpu;
-	int uvhub;
 	int locals = 0;
 	int remotes = 0;
 	int hubs = 0;
+	int tcpu;
+	int tpnode;
 	struct bau_desc *bau_desc;
 	struct cpumask *flush_mask;
 	struct ptc_stats *stat;
 	struct bau_control *bcp;
 	struct bau_control *tbcp;
+	struct hub_and_pnode *hpp;
 
 	/* kernel was booted 'nobau' */
 	if (nobau)
@@ -749,11 +750,18 @@ const struct cpumask *uv_flush_tlb_other
 	bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu;
 	bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE);
 
-	/* cpu statistics */
 	for_each_cpu(tcpu, flush_mask) {
-		uvhub = uv_cpu_to_blade_id(tcpu);
-		bau_uvhub_set(uvhub, &bau_desc->distribution);
-		if (uvhub == bcp->uvhub)
+		/*
+		 * The distribution vector is a bit map of pnodes, relative
+		 * to the partition base pnode (and the partition base nasid
+		 * in the header).
+		 * Translate cpu to pnode and hub using an array stored
+		 * in local memory.
+		 */
+		hpp = &bcp->socket_master->target_hub_and_pnode[tcpu];
+		tpnode = hpp->pnode - bcp->partition_base_pnode;
+		bau_uvhub_set(tpnode, &bau_desc->distribution);
+		if (hpp->uvhub == bcp->uvhub)
 			locals++;
 		else
 			remotes++;
@@ -854,7 +862,7 @@ void uv_bau_message_interrupt(struct pt_
  * an interrupt, but causes an error message to be returned to
  * the sender.
  */
-static void uv_enable_timeouts(void)
+static void __init uv_enable_timeouts(void)
 {
 	int uvhub;
 	int nuvhubs;
@@ -1325,10 +1333,10 @@ static int __init uv_ptc_init(void)
 }
 
 /*
- * initialize the sending side's sending buffers
+ * Initialize the sending side's sending buffers.
  */
 static void
-uv_activation_descriptor_init(int node, int pnode)
+uv_activation_descriptor_init(int node, int pnode, int base_pnode)
 {
 	int i;
 	int cpu;
@@ -1351,11 +1359,11 @@ uv_activation_descriptor_init(int node,
 	n = pa >> uv_nshift;
 	m = pa & uv_mmask;
 
+	/* the 14-bit pnode */
 	uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
 			      (n << UV_DESC_BASE_PNODE_SHIFT | m));
-
 	/*
-	 * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
+	 * Initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
 	 * cpu even though we only use the first one; one descriptor can
 	 * describe a broadcast to 256 uv hubs.
 	 */
@@ -1364,12 +1372,13 @@ uv_activation_descriptor_init(int node,
 		memset(bd2, 0, sizeof(struct bau_desc));
 		bd2->header.sw_ack_flag = 1;
 		/*
-		 * base_dest_nodeid is the nasid of the first uvhub
-		 * in the partition. The bit map will indicate uvhub numbers,
-		 * which are 0-N in a partition. Pnodes are unique system-wide.
+		 * The base_dest_nasid set in the message header is the nasid
+		 * of the first uvhub in the partition. The bit map will
+		 * indicate destination pnode numbers relative to that base.
+		 * They may not be consecutive if nasid striding is being used.
 		 */
-		bd2->header.base_dest_nodeid = UV_PNODE_TO_NASID(uv_partition_base_pnode);
-		bd2->header.dest_subnodeid = 0x10; /* the LB */
+		bd2->header.base_dest_nasid = UV_PNODE_TO_NASID(base_pnode);
+		bd2->header.dest_subnodeid = UV_LB_SUBNODEID;
 		bd2->header.command = UV_NET_ENDPOINT_INTD;
 		bd2->header.int_both = 1;
 		/*
@@ -1441,7 +1450,7 @@ uv_payload_queue_init(int node, int pnod
 /*
  * Initialization of each UV hub's structures
  */
-static void __init uv_init_uvhub(int uvhub, int vector)
+static void __init uv_init_uvhub(int uvhub, int vector, int base_pnode)
 {
 	int node;
 	int pnode;
@@ -1449,11 +1458,11 @@ static void __init uv_init_uvhub(int uvh
 
 	node = uvhub_to_first_node(uvhub);
 	pnode = uv_blade_to_pnode(uvhub);
-	uv_activation_descriptor_init(node, pnode);
+	uv_activation_descriptor_init(node, pnode, base_pnode);
 	uv_payload_queue_init(node, pnode);
 	/*
-	 * the below initialization can't be in firmware because the
-	 * messaging IRQ will be determined by the OS
+	 * The below initialization can't be in firmware because the
+	 * messaging IRQ will be determined by the OS.
 	 */
 	apicid = uvhub_to_first_apicid(uvhub) | uv_apicid_hibits;
 	uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
@@ -1490,10 +1499,11 @@ calculate_destination_timeout(void)
 /*
  * initialize the bau_control structure for each cpu
  */
-static int __init uv_init_per_cpu(int nuvhubs)
+static int __init uv_init_per_cpu(int nuvhubs, int base_part_pnode)
 {
 	int i;
 	int cpu;
+	int tcpu;
 	int pnode;
 	int uvhub;
 	int have_hmaster;
@@ -1527,6 +1537,15 @@ static int __init uv_init_per_cpu(int nu
 		bcp = &per_cpu(bau_control, cpu);
 		memset(bcp, 0, sizeof(struct bau_control));
 		pnode = uv_cpu_hub_info(cpu)->pnode;
+		if ((pnode - base_part_pnode) >= UV_DISTRIBUTION_SIZE) {
+			printk(KERN_EMERG
+				"cpu %d pnode %d-%d beyond %d; BAU disabled\n",
+				cpu, pnode, base_part_pnode,
+				UV_DISTRIBUTION_SIZE);
+			return 1;
+		}
+		bcp->osnode = cpu_to_node(cpu);
+		bcp->partition_base_pnode = uv_partition_base_pnode;
 		uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
 		*(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8));
 		bdp = &uvhub_descs[uvhub];
@@ -1535,7 +1554,7 @@ static int __init uv_init_per_cpu(int nu
 		bdp->pnode = pnode;
 		/* kludge: 'assuming' one node per socket, and assuming that
 		   disabling a socket just leaves a gap in node numbers */
-		socket = (cpu_to_node(cpu) & 1);
+		socket = bcp->osnode & 1;
 		bdp->socket_mask |= (1 << socket);
 		sdp = &bdp->socket[socket];
 		sdp->cpu_number[sdp->num_cpus] = cpu;
@@ -1584,6 +1603,20 @@ static int __init uv_init_per_cpu(int nu
 nextsocket:
 			socket++;
 			socket_mask = (socket_mask >> 1);
+			/* each socket gets a local array of pnodes/hubs */
+			bcp = smaster;
+			bcp->target_hub_and_pnode = kmalloc_node(
+				sizeof(struct hub_and_pnode) *
+				num_possible_cpus(), GFP_KERNEL, bcp->osnode);
+			memset(bcp->target_hub_and_pnode, 0,
+				sizeof(struct hub_and_pnode) *
+				num_possible_cpus());
+			for_each_present_cpu(tcpu) {
+				bcp->target_hub_and_pnode[tcpu].pnode =
+					uv_cpu_hub_info(tcpu)->pnode;
+				bcp->target_hub_and_pnode[tcpu].uvhub =
+					uv_cpu_hub_info(tcpu)->numa_blade_id;
+			}
 		}
 	}
 	kfree(uvhub_descs);
@@ -1636,21 +1669,22 @@ static int __init uv_bau_init(void)
 	spin_lock_init(&disable_lock);
 	congested_cycles = microsec_2_cycles(congested_response_us);
 
-	if (uv_init_per_cpu(nuvhubs)) {
-		nobau = 1;
-		return 0;
-	}
-
 	uv_partition_base_pnode = 0x7fffffff;
-	for (uvhub = 0; uvhub < nuvhubs; uvhub++)
+	for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
 		if (uv_blade_nr_possible_cpus(uvhub) &&
 			(uv_blade_to_pnode(uvhub) < uv_partition_base_pnode))
 			uv_partition_base_pnode = uv_blade_to_pnode(uvhub);
+	}
+
+	if (uv_init_per_cpu(nuvhubs, uv_partition_base_pnode)) {
+		nobau = 1;
+		return 0;
+	}
 
 	vector = UV_BAU_MESSAGE;
 	for_each_possible_blade(uvhub)
 		if (uv_blade_nr_possible_cpus(uvhub))
-			uv_init_uvhub(uvhub, vector);
+			uv_init_uvhub(uvhub, vector, uv_partition_base_pnode);
 
 	uv_enable_timeouts();
 	alloc_intr_gate(vector, uv_bau_message_intr1);



  parent reply	other threads:[~2011-05-19 18:11 UTC|newest]

Thread overview: 81+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-19 18:06 [00/71] 2.6.38.7-stable review Greg KH
2011-05-19 18:04 ` [01/71] cifs: change bleft in decode_unicode_ssetup back to signed type Greg KH
2011-05-19 18:04 ` [02/71] cifs: check for bytes_remaining going to zero in CIFS_SessSetup Greg KH
2011-05-19 18:04 ` [03/71] cifs: sanitize length checking in coalesce_t2 (try #3) Greg KH
2011-05-19 18:04 ` [04/71] cifs: refactor mid finding loop in cifs_demultiplex_thread Greg KH
2011-05-19 18:04 ` [05/71] cifs: handle errors from coalesce_t2 Greg KH
2011-05-19 18:04 ` [06/71] Validate size of EFI GUID partition entries Greg KH
2011-05-19 18:04 ` [07/71] drm/radeon/kms: add pci id to acer travelmate quirk for 5730 Greg KH
2011-05-19 18:04 ` [08/71] thinkpad-acpi: module autoloading for newer Lenovo ThinkPads Greg KH
2011-05-20  0:58   ` Henrique de Moraes Holschuh
2011-05-19 18:04 ` [09/71] x86, hw_breakpoints: Fix racy access to ptrace breakpoints Greg KH
2011-05-19 18:04 ` [10/71] ptrace: Prepare to fix racy accesses on task breakpoints Greg KH
2011-05-19 18:04 ` [11/71] hw_breakpoints, powerpc: Fix CONFIG_HAVE_HW_BREAKPOINT off-case in ptrace_set_debugreg() Greg KH
2011-05-19 18:04   ` Greg KH
2011-05-19 18:04 ` [12/71] iwlwifi: add {ack, plpc}_check module parameters Greg KH
2011-05-19 18:04 ` [13/71] [stable] [PATCH] drm/radeon/kms: fix gart setup on fusion parts (v2) backport Greg KH
2011-05-19 18:04 ` [14/71] vm: fix vm_pgoff wrap in upward expansion Greg KH
2011-05-19 18:04 ` [15/71] Dont lock guardpage if the stack is growing up Greg KH
2011-05-19 18:04 ` [16/71] drm/i915/dp: Be paranoid in case we disable a DP before it is attached Greg KH
2011-05-19 18:04 ` [17/71] drm/i915/lvds: Only act on lid notify when the device is on Greg KH
2011-05-19 18:04 ` [18/71] drm/i915: Release object along create user fb error path Greg KH
2011-05-19 18:04 ` [19/71] dccp: handle invalid feature options length Greg KH
2011-05-19 18:04 ` [20/71] CIFS: Fix memory over bound bug in cifs_parse_mount_options Greg KH
2011-05-19 18:04 ` [21/71] drivers/rtc/rtc-s3c.c: fixup wake support for rtc Greg KH
2011-05-19 18:04 ` [22/71] mm: use alloc_bootmem_node_nopanic() on really needed path Greg KH
2011-05-19 18:04 ` [23/71] tmpfs: fix race between umount and swapoff Greg KH
2011-05-21  4:48   ` Hugh Dickins
2011-05-21 21:43     ` Greg KH
2011-05-19 18:04 ` [24/71] ARM: zImage: make sure the stack is 64-bit aligned Greg KH
2011-05-19 18:04 ` [25/71] PM: Fix warning in pm_restrict_gfp_mask() during SNAPSHOT_S2RAM ioctl Greg KH
2011-05-19 18:04 ` [26/71] PM / Hibernate: Make snapshot_release() restore GFP mask Greg KH
2011-05-19 18:04 ` [27/71] PM / Hibernate: Fix ioctl SNAPSHOT_S2RAM Greg KH
2011-05-19 18:04 ` [28/71] net: ip_expire() must revalidate route Greg KH
2011-05-19 18:04 ` [29/71] can: fix SJA1000 dlc for RTR packets Greg KH
2011-05-19 20:17   ` Kurt Van Dijck
2011-05-19 18:04 ` [30/71] ipheth: Properly distinguish length and alignment in URBs and skbs Greg KH
2011-05-19 18:04 ` [31/71] vmxnet3: Consistently disable irqs when taking adapter->cmd_lock Greg KH
2011-05-19 18:05 ` [32/71] ehea: fix wrongly reported speed and port Greg KH
2011-05-19 18:05 ` [33/71] NET: slip, fix ldisc->open retval Greg KH
2011-05-19 18:05 ` [34/71] PCH_GbE : Fixed the issue of collision detection Greg KH
2011-05-19 18:05 ` [35/71] PCH_GbE : Fixed the issue of checksum judgment Greg KH
2011-05-19 18:05 ` [36/71] pch_gbe: support ML7223 IOH Greg KH
2011-05-19 18:05 ` [37/71] net: dev_close() should check IFF_UP Greg KH
2011-05-19 18:05 ` [38/71] slcan: fix ldisc->open retval Greg KH
2011-05-19 18:05 ` [39/71] ASoC: UDA134x: Remove POWER_OFF_ON_STANDBY define Greg KH
2011-05-19 18:05 ` [40/71] ASoC: SSM2602: Fix Mic Boost2 control Greg KH
2011-05-19 18:05 ` [41/71] ne-h8300: Fix regression caused during net_device_ops conversion Greg KH
2011-05-19 18:05 ` [42/71] hydra: " Greg KH
2011-05-19 18:05 ` [43/71] ehea: Fix memory hotplug oops Greg KH
2011-05-19 18:05 ` [44/71] libertas: fix cmdpendingq locking Greg KH
2011-05-19 18:05 ` [45/71] zorro8390: Fix regression caused during net_device_ops conversion Greg KH
2011-05-19 18:05 ` [46/71] tmpfs: fix race between umount and writepage Greg KH
2011-05-19 18:05 ` [47/71] tmpfs: fix race between swapoff " Greg KH
2011-05-19 18:05 ` [48/71] tmpfs: fix off-by-one in max_blocks checks Greg KH
2011-05-19 18:05 ` [49/71] tmpfs: fix spurious ENOSPC when racing with unswap Greg KH
2011-05-19 18:05 ` [50/71] libata: fix oops when LPM is used with PMP Greg KH
2011-05-19 18:05 ` [51/71] drm/radeon/kms: fix extended lvds info parsing Greg KH
2011-05-19 18:05 ` [52/71] Revert "mmc: fix a race between card-detect rescan and clock-gate work instances" Greg KH
2011-05-19 18:05 ` [53/71] cifs: add fallback in is_path_accessible for old servers Greg KH
2011-05-19 18:05 ` [54/71] rapidio: fix default routing initialization Greg KH
2011-05-19 18:05 ` [55/71] Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors" Greg KH
2011-05-19 18:05 ` [56/71] x86, AMD: Fix ARAT feature setting again Greg KH
2011-05-19 18:05 ` [57/71] block: rescan partitions on invalidated devices on -ENOMEDIA too Greg KH
2011-05-19 18:12   ` Tejun Heo
2011-05-19 18:18     ` Greg KH
2011-05-25  9:09       ` Tejun Heo
2011-05-30  0:01         ` [stable] " Greg KH
2011-05-19 18:05 ` [58/71] clocksource: Install completely before selecting Greg KH
2011-05-19 18:05 ` [59/71] tick: Clear broadcast active bit when switching to oneshot Greg KH
2011-05-19 18:05 ` [60/71] x86, apic: Fix spurious error interrupts triggering on all non-boot APs Greg KH
2011-05-19 18:05 ` [61/71] [media] Fix cx88 remote control input Greg KH
2011-05-19 18:05 ` [62/71] [media] v4l: Release module if subdev registration fails Greg KH
2011-05-19 18:05 ` Greg KH [this message]
2011-05-19 18:05 ` [64/71] x86, mce, AMD: Fix leaving freed data in a list Greg KH
2011-05-19 18:05 ` [65/71] [SCSI] megaraid_sas: Sanity check user supplied length before passing it to dma_alloc_coherent() Greg KH
2011-05-19 18:05 ` [66/71] cdrom: always check_disk_change() on open Greg KH
2011-05-19 18:05 ` [67/71] vmxnet3: Fix inconsistent LRO state after initialization Greg KH
2011-05-19 18:05 ` [68/71] [SCSI] Revert "[SCSI] Retrieve the Caching mode page" Greg KH
2011-05-19 18:05 ` [69/71] cifs: clean up various nits in unicode routines (try #2) Greg KH
2011-05-19 18:05 ` [70/71] cifs: fix cifsConvertToUCS() for the mapchars case Greg KH
2011-05-19 18:05 ` [71/71] iwlegacy: fix IBSS mode crashes Greg KH

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