diff options
Diffstat (limited to 'arch/x86/platform/uv/tlb_uv.c')
| -rw-r--r-- | arch/x86/platform/uv/tlb_uv.c | 1484 |
1 files changed, 816 insertions, 668 deletions
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c index c58e0ea39ef5..68e467f69fec 100644 --- a/arch/x86/platform/uv/tlb_uv.c +++ b/arch/x86/platform/uv/tlb_uv.c @@ -1,7 +1,7 @@ /* * SGI UltraViolet TLB flush routines. * - * (c) 2008-2010 Cliff Wickman <cpw@sgi.com>, SGI. + * (c) 2008-2011 Cliff Wickman <cpw@sgi.com>, SGI. * * This code is released under the GNU General Public License version 2 or * later. @@ -35,6 +35,7 @@ static int timeout_base_ns[] = { 5242880, 167772160 }; + static int timeout_us; static int nobau; static int baudisabled; @@ -42,20 +43,70 @@ static spinlock_t disable_lock; static cycles_t congested_cycles; /* tunables: */ -static int max_bau_concurrent = MAX_BAU_CONCURRENT; -static int max_bau_concurrent_constant = MAX_BAU_CONCURRENT; -static int plugged_delay = PLUGGED_DELAY; -static int plugsb4reset = PLUGSB4RESET; -static int timeoutsb4reset = TIMEOUTSB4RESET; -static int ipi_reset_limit = IPI_RESET_LIMIT; -static int complete_threshold = COMPLETE_THRESHOLD; -static int congested_response_us = CONGESTED_RESPONSE_US; -static int congested_reps = CONGESTED_REPS; -static int congested_period = CONGESTED_PERIOD; +static int max_concurr = MAX_BAU_CONCURRENT; +static int max_concurr_const = MAX_BAU_CONCURRENT; +static int plugged_delay = PLUGGED_DELAY; +static int plugsb4reset = PLUGSB4RESET; +static int timeoutsb4reset = TIMEOUTSB4RESET; +static int ipi_reset_limit = IPI_RESET_LIMIT; +static int complete_threshold = COMPLETE_THRESHOLD; +static int congested_respns_us = CONGESTED_RESPONSE_US; +static int congested_reps = CONGESTED_REPS; +static int congested_period = CONGESTED_PERIOD; + +static struct tunables tunables[] = { + {&max_concurr, MAX_BAU_CONCURRENT}, /* must be [0] */ + {&plugged_delay, PLUGGED_DELAY}, + {&plugsb4reset, PLUGSB4RESET}, + {&timeoutsb4reset, TIMEOUTSB4RESET}, + {&ipi_reset_limit, IPI_RESET_LIMIT}, + {&complete_threshold, COMPLETE_THRESHOLD}, + {&congested_respns_us, CONGESTED_RESPONSE_US}, + {&congested_reps, CONGESTED_REPS}, + {&congested_period, CONGESTED_PERIOD} +}; + static struct dentry *tunables_dir; static struct dentry *tunables_file; -static int __init setup_nobau(char *arg) +/* these correspond to the statistics printed by ptc_seq_show() */ +static char *stat_description[] = { + "sent: number of shootdown messages sent", + "stime: time spent sending messages", + "numuvhubs: number of hubs targeted with shootdown", + "numuvhubs16: number times 16 or more hubs targeted", + "numuvhubs8: number times 8 or more hubs targeted", + "numuvhubs4: number times 4 or more hubs targeted", + "numuvhubs2: number times 2 or more hubs targeted", + "numuvhubs1: number times 1 hub targeted", + "numcpus: number of cpus targeted with shootdown", + "dto: number of destination timeouts", + "retries: destination timeout retries sent", + "rok: : destination timeouts successfully retried", + "resetp: ipi-style resource resets for plugs", + "resett: ipi-style resource resets for timeouts", + "giveup: fall-backs to ipi-style shootdowns", + "sto: number of source timeouts", + "bz: number of stay-busy's", + "throt: number times spun in throttle", + "swack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE", + "recv: shootdown messages received", + "rtime: time spent processing messages", + "all: shootdown all-tlb messages", + "one: shootdown one-tlb messages", + "mult: interrupts that found multiple messages", + "none: interrupts that found no messages", + "retry: number of retry messages processed", + "canc: number messages canceled by retries", + "nocan: number retries that found nothing to cancel", + "reset: number of ipi-style reset requests processed", + "rcan: number messages canceled by reset requests", + "disable: number times use of the BAU was disabled", + "enable: number times use of the BAU was re-enabled" +}; + +static int __init +setup_nobau(char *arg) { nobau = 1; return 0; @@ -63,7 +114,7 @@ static int __init setup_nobau(char *arg) early_param("nobau", setup_nobau); /* base pnode in this partition */ -static int uv_partition_base_pnode __read_mostly; +static int uv_base_pnode __read_mostly; /* position of pnode (which is nasid>>1): */ static int uv_nshift __read_mostly; static unsigned long uv_mmask __read_mostly; @@ -109,60 +160,52 @@ static int __init uvhub_to_first_apicid(int uvhub) * clear of the Timeout bit (as well) will free the resource. No reply will * be sent (the hardware will only do one reply per message). */ -static inline void uv_reply_to_message(struct msg_desc *mdp, - struct bau_control *bcp) +static void reply_to_message(struct msg_desc *mdp, struct bau_control *bcp) { unsigned long dw; - struct bau_payload_queue_entry *msg; + struct bau_pq_entry *msg; msg = mdp->msg; if (!msg->canceled) { - dw = (msg->sw_ack_vector << UV_SW_ACK_NPENDING) | - msg->sw_ack_vector; - uv_write_local_mmr( - UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, dw); + dw = (msg->swack_vec << UV_SW_ACK_NPENDING) | msg->swack_vec; + write_mmr_sw_ack(dw); } msg->replied_to = 1; - msg->sw_ack_vector = 0; + msg->swack_vec = 0; } /* * Process the receipt of a RETRY message */ -static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, - struct bau_control *bcp) +static void bau_process_retry_msg(struct msg_desc *mdp, + struct bau_control *bcp) { int i; int cancel_count = 0; - int slot2; unsigned long msg_res; unsigned long mmr = 0; - struct bau_payload_queue_entry *msg; - struct bau_payload_queue_entry *msg2; - struct ptc_stats *stat; + struct bau_pq_entry *msg = mdp->msg; + struct bau_pq_entry *msg2; + struct ptc_stats *stat = bcp->statp; - msg = mdp->msg; - stat = bcp->statp; stat->d_retries++; /* * cancel any message from msg+1 to the retry itself */ for (msg2 = msg+1, i = 0; i < DEST_Q_SIZE; msg2++, i++) { - if (msg2 > mdp->va_queue_last) - msg2 = mdp->va_queue_first; + if (msg2 > mdp->queue_last) + msg2 = mdp->queue_first; if (msg2 == msg) break; - /* same conditions for cancellation as uv_do_reset */ + /* same conditions for cancellation as do_reset */ if ((msg2->replied_to == 0) && (msg2->canceled == 0) && - (msg2->sw_ack_vector) && ((msg2->sw_ack_vector & - msg->sw_ack_vector) == 0) && + (msg2->swack_vec) && ((msg2->swack_vec & + msg->swack_vec) == 0) && (msg2->sending_cpu == msg->sending_cpu) && (msg2->msg_type != MSG_NOOP)) { - slot2 = msg2 - mdp->va_queue_first; - mmr = uv_read_local_mmr - (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE); - msg_res = msg2->sw_ack_vector; + mmr = read_mmr_sw_ack(); + msg_res = msg2->swack_vec; /* * This is a message retry; clear the resources held * by the previous message only if they timed out. @@ -170,6 +213,7 @@ static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, * situation to report. */ if (mmr & (msg_res << UV_SW_ACK_NPENDING)) { + unsigned long mr; /* * is the resource timed out? * make everyone ignore the cancelled message. @@ -177,10 +221,8 @@ static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, msg2->canceled = 1; stat->d_canceled++; cancel_count++; - uv_write_local_mmr( - UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, - (msg_res << UV_SW_ACK_NPENDING) | - msg_res); + mr = (msg_res << UV_SW_ACK_NPENDING) | msg_res; + write_mmr_sw_ack(mr); } } } @@ -192,20 +234,19 @@ static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, * Do all the things a cpu should do for a TLB shootdown message. * Other cpu's may come here at the same time for this message. */ -static void uv_bau_process_message(struct msg_desc *mdp, - struct bau_control *bcp) +static void bau_process_message(struct msg_desc *mdp, + struct bau_control *bcp) { - int msg_ack_count; short socket_ack_count = 0; - struct ptc_stats *stat; - struct bau_payload_queue_entry *msg; + short *sp; + struct atomic_short *asp; + struct ptc_stats *stat = bcp->statp; + struct bau_pq_entry *msg = mdp->msg; struct bau_control *smaster = bcp->socket_master; /* * This must be a normal message, or retry of a normal message */ - msg = mdp->msg; - stat = bcp->statp; if (msg->address == TLB_FLUSH_ALL) { local_flush_tlb(); stat->d_alltlb++; @@ -222,30 +263,32 @@ static void uv_bau_process_message(struct msg_desc *mdp, * cpu number. */ if (msg->msg_type == MSG_RETRY && bcp == bcp->uvhub_master) - uv_bau_process_retry_msg(mdp, bcp); + bau_process_retry_msg(mdp, bcp); /* - * This is a sw_ack message, so we have to reply to it. + * This is a swack message, so we have to reply to it. * Count each responding cpu on the socket. This avoids * pinging the count's cache line back and forth between * the sockets. */ - socket_ack_count = atomic_add_short_return(1, (struct atomic_short *) - &smaster->socket_acknowledge_count[mdp->msg_slot]); + sp = &smaster->socket_acknowledge_count[mdp->msg_slot]; + asp = (struct atomic_short *)sp; + socket_ack_count = atom_asr(1, asp); if (socket_ack_count == bcp->cpus_in_socket) { + int msg_ack_count; /* * Both sockets dump their completed count total into * the message's count. */ smaster->socket_acknowledge_count[mdp->msg_slot] = 0; - msg_ack_count = atomic_add_short_return(socket_ack_count, - (struct atomic_short *)&msg->acknowledge_count); + asp = (struct atomic_short *)&msg->acknowledge_count; + msg_ack_count = atom_asr(socket_ack_count, asp); if (msg_ack_count == bcp->cpus_in_uvhub) { /* * All cpus in uvhub saw it; reply */ - uv_reply_to_message(mdp, bcp); + reply_to_message(mdp, bcp); } } @@ -268,62 +311,51 @@ static int uvhub_to_first_cpu(int uvhub) * Last resort when we get a large number of destination timeouts is * to clear resources held by a given cpu. * Do this with IPI so that all messages in the BAU message queue - * can be identified by their nonzero sw_ack_vector field. + * can be identified by their nonzero swack_vec field. * * This is entered for a single cpu on the uvhub. * The sender want's this uvhub to free a specific message's - * sw_ack resources. + * swack resources. */ -static void -uv_do_reset(void *ptr) +static void do_reset(void *ptr) { int i; - int slot; - int count = 0; - unsigned long mmr; - unsigned long msg_res; - struct bau_control *bcp; - struct reset_args *rap; - struct bau_payload_queue_entry *msg; - struct ptc_stats *stat; + struct bau_control *bcp = &per_cpu(bau_control, smp_processor_id()); + struct reset_args *rap = (struct reset_args *)ptr; + struct bau_pq_entry *msg; + struct ptc_stats *stat = bcp->statp; - bcp = &per_cpu(bau_control, smp_processor_id()); - rap = (struct reset_args *)ptr; - stat = bcp->statp; stat->d_resets++; - /* * We're looking for the given sender, and - * will free its sw_ack resource. + * will free its swack resource. * If all cpu's finally responded after the timeout, its * message 'replied_to' was set. */ - for (msg = bcp->va_queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) { - /* uv_do_reset: same conditions for cancellation as - uv_bau_process_retry_msg() */ + for (msg = bcp->queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) { + unsigned long msg_res; + /* do_reset: same conditions for cancellation as + bau_process_retry_msg() */ if ((msg->replied_to == 0) && (msg->canceled == 0) && (msg->sending_cpu == rap->sender) && - (msg->sw_ack_vector) && + (msg->swack_vec) && (msg->msg_type != MSG_NOOP)) { + unsigned long mmr; + unsigned long mr; /* * make everyone else ignore this message */ msg->canceled = 1; - slot = msg - bcp->va_queue_first; - count++; /* * only reset the resource if it is still pending */ - mmr = uv_read_local_mmr - (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE); - msg_res = msg->sw_ack_vector; + mmr = read_mmr_sw_ack(); + msg_res = msg->swack_vec; + mr = (msg_res << UV_SW_ACK_NPENDING) | msg_res; if (mmr & msg_res) { stat->d_rcanceled++; - uv_write_local_mmr( - UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, - (msg_res << UV_SW_ACK_NPENDING) | - msg_res); + write_mmr_sw_ack(mr); } } } @@ -334,39 +366,38 @@ uv_do_reset(void *ptr) * Use IPI to get all target uvhubs to release resources held by * a given sending cpu number. */ -static void uv_reset_with_ipi(struct bau_target_uvhubmask *distribution, - int sender) +static void reset_with_ipi(struct bau_targ_hubmask *distribution, int sender) { int uvhub; - int cpu; + int maskbits; cpumask_t mask; struct reset_args reset_args; reset_args.sender = sender; - cpus_clear(mask); /* find a single cpu for each uvhub in this distribution mask */ - for (uvhub = 0; - uvhub < sizeof(struct bau_target_uvhubmask) * BITSPERBYTE; - uvhub++) { + maskbits = sizeof(struct bau_targ_hubmask) * BITSPERBYTE; + for (uvhub = 0; uvhub < maskbits; uvhub++) { + int cpu; if (!bau_uvhub_isset(uvhub, distribution)) continue; /* find a cpu for this uvhub */ cpu = uvhub_to_first_cpu(uvhub); cpu_set(cpu, mask); } - /* IPI all cpus; Preemption is already disabled */ - smp_call_function_many(&mask, uv_do_reset, (void *)&reset_args, 1); + + /* IPI all cpus; preemption is already disabled */ + smp_call_function_many(&mask, do_reset, (void *)&reset_args, 1); return; } -static inline unsigned long -cycles_2_us(unsigned long long cyc) +static inline unsigned long cycles_2_us(unsigned long long cyc) { unsigned long long ns; unsigned long us; - ns = (cyc * per_cpu(cyc2ns, smp_processor_id())) - >> CYC2NS_SCALE_FACTOR; + int cpu = smp_processor_id(); + + ns = (cyc * per_cpu(cyc2ns, cpu)) >> CYC2NS_SCALE_FACTOR; us = ns / 1000; return us; } @@ -376,56 +407,56 @@ cycles_2_us(unsigned long long cyc) * leaves uvhub_quiesce set so that no new broadcasts are started by * bau_flush_send_and_wait() */ -static inline void -quiesce_local_uvhub(struct bau_control *hmaster) +static inline void quiesce_local_uvhub(struct bau_control *hmaster) { - atomic_add_short_return(1, (struct atomic_short *) - &hmaster->uvhub_quiesce); + atom_asr(1, (struct atomic_short *)&hmaster->uvhub_quiesce); } /* * mark this quiet-requestor as done */ -static inline void -end_uvhub_quiesce(struct bau_control *hmaster) +static inline void end_uvhub_quiesce(struct bau_control *hmaster) { - atomic_add_short_return(-1, (struct atomic_short *) - &hmaster->uvhub_quiesce); + atom_asr(-1, (struct atomic_short *)&hmaster->uvhub_quiesce); +} + +static unsigned long uv1_read_status(unsigned long mmr_offset, int right_shift) +{ + unsigned long descriptor_status; + + descriptor_status = uv_read_local_mmr(mmr_offset); + descriptor_status >>= right_shift; + descriptor_status &= UV_ACT_STATUS_MASK; + return descriptor_status; } /* * Wait for completion of a broadcast software ack message * return COMPLETE, RETRY(PLUGGED or TIMEOUT) or GIVEUP */ -static int uv_wait_completion(struct bau_desc *bau_desc, - unsigned long mmr_offset, int right_shift, int this_cpu, - struct bau_control *bcp, struct bau_control *smaster, long try) +static int uv1_wait_completion(struct bau_desc *bau_desc, + unsigned long mmr_offset, int right_shift, + struct bau_control *bcp, long try) { unsigned long descriptor_status; - cycles_t ttime; + cycles_t ttm; struct ptc_stats *stat = bcp->statp; - struct bau_control *hmaster; - - hmaster = bcp->uvhub_master; + descriptor_status = uv1_read_status(mmr_offset, right_shift); /* spin on the status MMR, waiting for it to go idle */ - while ((descriptor_status = (((unsigned long) - uv_read_local_mmr(mmr_offset) >> - right_shift) & UV_ACT_STATUS_MASK)) != - DESC_STATUS_IDLE) { + while ((descriptor_status != DS_IDLE)) { /* - * Our software ack messages may be blocked because there are - * no swack resources available. As long as none of them - * has timed out hardware will NACK our message and its - * state will stay IDLE. + * Our software ack messages may be blocked because + * there are no swack resources available. As long + * as none of them has timed out hardware will NACK + * our message and its state will stay IDLE. */ - if (descriptor_status == DESC_STATUS_SOURCE_TIMEOUT) { + if (descriptor_status == DS_SOURCE_TIMEOUT) { stat->s_stimeout++; return FLUSH_GIVEUP; - } else if (descriptor_status == - DESC_STATUS_DESTINATION_TIMEOUT) { + } else if (descriptor_status == DS_DESTINATION_TIMEOUT) { stat->s_dtimeout++; - ttime = get_cycles(); + ttm = get_cycles(); /* * Our retries may be blocked by all destination @@ -433,8 +464,7 @@ static int uv_wait_completion(struct bau_desc *bau_desc, * pending. In that case hardware returns the * ERROR that looks like a destination timeout. */ - if (cycles_2_us(ttime - bcp->send_message) < - timeout_us) { + if (cycles_2_us(ttm - bcp->send_message) < timeout_us) { bcp->conseccompletes = 0; return FLUSH_RETRY_PLUGGED; } @@ -447,80 +477,160 @@ static int uv_wait_completion(struct bau_desc *bau_desc, */ cpu_relax(); } + descriptor_status = uv1_read_status(mmr_offset, right_shift); } bcp->conseccompletes++; return FLUSH_COMPLETE; } -static inline cycles_t -sec_2_cycles(unsigned long sec) +/* + * UV2 has an extra bit of status in the ACTIVATION_STATUS_2 register. + */ +static unsigned long uv2_read_status(unsigned long offset, int rshft, int cpu) { - unsigned long ns; - cycles_t cyc; + unsigned long descriptor_status; + unsigned long descriptor_status2; - ns = sec * 1000000000; - cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id())); - return cyc; + descriptor_status = ((read_lmmr(offset) >> rshft) & UV_ACT_STATUS_MASK); + descriptor_status2 = (read_mmr_uv2_status() >> cpu) & 0x1UL; + descriptor_status = (descriptor_status << 1) | descriptor_status2; + return descriptor_status; +} + +static int uv2_wait_completion(struct bau_desc *bau_desc, + unsigned long mmr_offset, int right_shift, + struct bau_control *bcp, long try) +{ + unsigned long descriptor_stat; + cycles_t ttm; + int cpu = bcp->uvhub_cpu; + struct ptc_stats *stat = bcp->statp; + + descriptor_stat = uv2_read_status(mmr_offset, right_shift, cpu); + + /* spin on the status MMR, waiting for it to go idle */ + while (descriptor_stat != UV2H_DESC_IDLE) { + /* + * Our software ack messages may be blocked because + * there are no swack resources available. As long + * as none of them has timed out hardware will NACK + * our message and its state will stay IDLE. + */ + if ((descriptor_stat == UV2H_DESC_SOURCE_TIMEOUT) || + (descriptor_stat == UV2H_DESC_DEST_STRONG_NACK) || + (descriptor_stat == UV2H_DESC_DEST_PUT_ERR)) { + stat->s_stimeout++; + return FLUSH_GIVEUP; + } else if (descriptor_stat == UV2H_DESC_DEST_TIMEOUT) { + stat->s_dtimeout++; + ttm = get_cycles(); + /* + * Our retries may be blocked by all destination + * swack resources being consumed, and a timeout + * pending. In that case hardware returns the + * ERROR that looks like a destination timeout. + */ + if (cycles_2_us(ttm - bcp->send_message) < timeout_us) { + bcp->conseccompletes = 0; + return FLUSH_RETRY_PLUGGED; + } + bcp->conseccompletes = 0; + return FLUSH_RETRY_TIMEOUT; + } else { + /* + * descriptor_stat is still BUSY + */ + cpu_relax(); + } + descriptor_stat = uv2_read_status(mmr_offset, right_shift, cpu); + } + bcp->conseccompletes++; + return FLUSH_COMPLETE; } /* - * conditionally add 1 to *v, unless *v is >= u - * return 0 if we cannot add 1 to *v because it is >= u - * return 1 if we can add 1 to *v because it is < u - * the add is atomic - * - * This is close to atomic_add_unless(), but this allows the 'u' value - * to be lowered below the current 'v'. atomic_add_unless can only stop - * on equal. + * There are 2 status registers; each and array[32] of 2 bits. Set up for + * which register to read and position in that register based on cpu in + * current hub. */ -static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u) +static int wait_completion(struct bau_desc *bau_desc, + struct bau_control *bcp, long try) { - spin_lock(lock); - if (atomic_read(v) >= u) { - spin_unlock(lock); - return 0; + int right_shift; + unsigned long mmr_offset; + int cpu = bcp->uvhub_cpu; + + if (cpu < UV_CPUS_PER_AS) { + mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0; + right_shift = cpu * UV_ACT_STATUS_SIZE; + } else { + mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1; + right_shift = ((cpu - UV_CPUS_PER_AS) * UV_ACT_STATUS_SIZE); } - atomic_inc(v); - spin_unlock(lock); - return 1; + + if (is_uv1_hub()) + return uv1_wait_completion(bau_desc, mmr_offset, right_shift, + bcp, try); + else + return uv2_wait_completion(bau_desc, mmr_offset, right_shift, + bcp, try); +} + +static inline cycles_t sec_2_cycles(unsigned long sec) +{ + unsigned long ns; + cycles_t cyc; + + ns = sec * 1000000000; + cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id())); + return cyc; } /* - * Our retries are blocked by all destination swack resources being + * Our retries are blocked by all destination sw ack resources being * in use, and a timeout is pending. In that case hardware immediately * returns the ERROR that looks like a destination timeout. */ -static void -destination_plugged(struct bau_desc *bau_desc, struct bau_control *bcp, +static void destination_plugged(struct bau_desc *bau_desc, + struct bau_control *bcp, struct bau_control *hmaster, struct ptc_stats *stat) { udelay(bcp->plugged_delay); bcp->plugged_tries++; + if (bcp->plugged_tries >= bcp->plugsb4reset) { bcp->plugged_tries = 0; + quiesce_local_uvhub(hmaster); + spin_lock(&hmaster->queue_lock); - uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu); + reset_with_ipi(&bau_desc->distribution, bcp->cpu); spin_unlock(&hmaster->queue_lock); + end_uvhub_quiesce(hmaster); + bcp->ipi_attempts++; stat->s_resets_plug++; } } -static void -destination_timeout(struct bau_desc *bau_desc, struct bau_control *bcp, - struct bau_control *hmaster, struct ptc_stats *stat) +static void destination_timeout(struct bau_desc *bau_desc, + struct bau_control *bcp, struct bau_control *hmaster, + struct ptc_stats *stat) { - hmaster->max_bau_concurrent = 1; + hmaster->max_concurr = 1; bcp->timeout_tries++; if (bcp->timeout_tries >= bcp->timeoutsb4reset) { bcp->timeout_tries = 0; + quiesce_local_uvhub(hmaster); + spin_lock(&hmaster->queue_lock); - uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu); + reset_with_ipi(&bau_desc->distribution, bcp->cpu); spin_unlock(&hmaster->queue_lock); + end_uvhub_quiesce(hmaster); + bcp->ipi_attempts++; stat->s_resets_timeout++; } @@ -530,34 +640,104 @@ destination_timeout(struct bau_desc *bau_desc, struct bau_control *bcp, * Completions are taking a very long time due to a congested numalink * network. */ -static void -disable_for_congestion(struct bau_control *bcp, struct ptc_stats *stat) +static void disable_for_congestion(struct bau_control *bcp, + struct ptc_stats *stat) { - int tcpu; - struct bau_control *tbcp; - /* let only one cpu do this disabling */ spin_lock(&disable_lock); + if (!baudisabled && bcp->period_requests && ((bcp->period_time / bcp->period_requests) > congested_cycles)) { + int tcpu; + struct bau_control *tbcp; /* it becomes this cpu's job to turn on the use of the BAU again */ baudisabled = 1; bcp->set_bau_off = 1; - bcp->set_bau_on_time = get_cycles() + - sec_2_cycles(bcp->congested_period); + bcp->set_bau_on_time = get_cycles(); + bcp->set_bau_on_time += sec_2_cycles(bcp->cong_period); stat->s_bau_disabled++; for_each_present_cpu(tcpu) { tbcp = &per_cpu(bau_control, tcpu); - tbcp->baudisabled = 1; + tbcp->baudisabled = 1; } } + spin_unlock(&disable_lock); } -/** - * uv_flush_send_and_wait - * +static void count_max_concurr(int stat, struct bau_control *bcp, + struct bau_control *hmaster) +{ + bcp->plugged_tries = 0; + bcp->timeout_tries = 0; + if (stat != FLUSH_COMPLETE) + return; + if (bcp->conseccompletes <= bcp->complete_threshold) + return; + if (hmaster->max_concurr >= hmaster->max_concurr_const) + return; + hmaster->max_concurr++; +} + +static void record_send_stats(cycles_t time1, cycles_t time2, + struct bau_control *bcp, struct ptc_stats *stat, + int completion_status, int try) +{ + cycles_t elapsed; + + if (time2 > time1) { + elapsed = time2 - time1; + stat->s_time += elapsed; + + if ((completion_status == FLUSH_COMPLETE) && (try == 1)) { + bcp->period_requests++; + bcp->period_time += elapsed; + if ((elapsed > congested_cycles) && + (bcp->period_requests > bcp->cong_reps)) + disable_for_congestion(bcp, stat); + } + } else + stat->s_requestor--; + + if (completion_status == FLUSH_COMPLETE && try > 1) + stat->s_retriesok++; + else if (completion_status == FLUSH_GIVEUP) + stat->s_giveup++; +} + +/* + * Because of a uv1 hardware bug only a limited number of concurrent + * requests can be made. + */ +static void uv1_throttle(struct bau_control *hmaster, struct ptc_stats *stat) +{ + spinlock_t *lock = &hmaster->uvhub_lock; + atomic_t *v; + + v = &hmaster->active_descriptor_count; + if (!atomic_inc_unless_ge(lock, v, hmaster->max_concurr)) { + stat->s_throttles++; + do { + cpu_relax(); + } while (!atomic_inc_unless_ge(lock, v, hmaster->max_concurr)); + } +} + +/* + * Handle the completion status of a message send. + */ +static void handle_cmplt(int completion_status, struct bau_desc *bau_desc, + struct bau_control *bcp, struct bau_control *hmaster, + struct ptc_stats *stat) +{ + if (completion_status == FLUSH_RETRY_PLUGGED) + destination_plugged(bau_desc, bcp, hmaster, stat); + else if (completion_status == FLUSH_RETRY_TIMEOUT) + destination_timeout(bau_desc, bcp, hmaster, stat); +} + +/* * Send a broadcast and wait for it to complete. * * The flush_mask contains the cpus the broadcast is to be sent to including @@ -568,44 +748,23 @@ disable_for_congestion(struct bau_control *bcp, struct ptc_stats *stat) * returned to the kernel. */ int uv_flush_send_and_wait(struct bau_desc *bau_desc, - struct cpumask *flush_mask, struct bau_control *bcp) + struct cpumask *flush_mask, struct bau_control *bcp) { - int right_shift; - int completion_status = 0; int seq_number = 0; + int completion_stat = 0; long try = 0; - int cpu = bcp->uvhub_cpu; - int this_cpu = bcp->cpu; - unsigned long mmr_offset; unsigned long index; cycles_t time1; cycles_t time2; - cycles_t elapsed; struct ptc_stats *stat = bcp->statp; - struct bau_control *smaster = bcp->socket_master; struct bau_control *hmaster = bcp->uvhub_master; - if (!atomic_inc_unless_ge(&hmaster->uvhub_lock, - &hmaster->active_descriptor_count, - hmaster->max_bau_concurrent)) { - stat->s_throttles++; - do { - cpu_relax(); - } while (!atomic_inc_unless_ge(&hmaster->uvhub_lock, - &hmaster->active_descriptor_count, - hmaster->max_bau_concurrent)); - } + if (is_uv1_hub()) + uv1_throttle(hmaster, stat); + while (hmaster->uvhub_quiesce) cpu_relax(); - if (cpu < UV_CPUS_PER_ACT_STATUS) { - mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0; - right_shift = cpu * UV_ACT_STATUS_SIZE; - } else { - mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1; - right_shift = - ((cpu - UV_CPUS_PER_ACT_STATUS) * UV_ACT_STATUS_SIZE); - } time1 = get_cycles(); do { if (try == 0) { @@ -615,64 +774,134 @@ int uv_flush_send_and_wait(struct bau_desc *bau_desc, bau_desc->header.msg_type = MSG_RETRY; stat->s_retry_messages++; } + bau_desc->header.sequence = seq_number; - index = (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) | - bcp->uvhub_cpu; + index = (1UL << AS_PUSH_SHIFT) | bcp->uvhub_cpu; bcp->send_message = get_cycles(); - uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index); + + write_mmr_activation(index); + try++; - completion_status = uv_wait_completion(bau_desc, mmr_offset, - right_shift, this_cpu, bcp, smaster, try); + completion_stat = wait_completion(bau_desc, bcp, try); + + handle_cmplt(completion_stat, bau_desc, bcp, hmaster, stat); - if (completion_status == FLUSH_RETRY_PLUGGED) { - destination_plugged(bau_desc, bcp, hmaster, stat); - } else if (completion_status == FLUSH_RETRY_TIMEOUT) { - destination_timeout(bau_desc, bcp, hmaster, stat); - } if (bcp->ipi_attempts >= bcp->ipi_reset_limit) { bcp->ipi_attempts = 0; - completion_status = FLUSH_GIVEUP; + completion_stat = FLUSH_GIVEUP; break; } cpu_relax(); - } while ((completion_status == FLUSH_RETRY_PLUGGED) || - (completion_status == FLUSH_RETRY_TIMEOUT)); + } while ((completion_stat == FLUSH_RETRY_PLUGGED) || + (completion_stat == FLUSH_RETRY_TIMEOUT)); + time2 = get_cycles(); - bcp->plugged_tries = 0; - bcp->timeout_tries = 0; - if ((completion_status == FLUSH_COMPLETE) && - (bcp->conseccompletes > bcp->complete_threshold) && - (hmaster->max_bau_concurrent < - hmaster->max_bau_concurrent_constant)) - hmaster->max_bau_concurrent++; + + count_max_concurr(completion_stat, bcp, hmaster); + while (hmaster->uvhub_quiesce) cpu_relax(); + atomic_dec(&hmaster->active_descriptor_count); - if (time2 > time1) { - elapsed = time2 - time1; - stat->s_time += elapsed; - if ((completion_status == FLUSH_COMPLETE) && (try == 1)) { - bcp->period_requests++; - bcp->period_time += elapsed; - if ((elapsed > congested_cycles) && - (bcp->period_requests > bcp->congested_reps)) { - disable_for_congestion(bcp, stat); + + record_send_stats(time1, time2, bcp, stat, completion_stat, try); + + if (completion_stat == FLUSH_GIVEUP) + return 1; + return 0; +} + +/* + * The BAU is disabled. When the disabled time period has expired, the cpu + * that disabled it must re-enable it. + * Return 0 if it is re-enabled for all cpus. + */ +static int check_enable(struct bau_control *bcp, struct ptc_stats *stat) +{ + int tcpu; + struct bau_control *tbcp; + + if (bcp->set_bau_off) { + if (get_cycles() >= bcp->set_bau_on_time) { + stat->s_bau_reenabled++; + baudisabled = 0; + for_each_present_cpu(tcpu) { + tbcp = &per_cpu(bau_control, tcpu); + tbcp->baudisabled = 0; + tbcp->period_requests = 0; + tbcp->period_time = 0; } + return 0; } + } + return -1; +} + +static void record_send_statistics(struct ptc_stats *stat, int locals, int hubs, + int remotes, struct bau_desc *bau_desc) +{ + stat->s_requestor++; + stat->s_ntargcpu += remotes + locals; + stat->s_ntargremotes += remotes; + stat->s_ntarglocals += locals; + + /* uvhub statistics */ + hubs = bau_uvhub_weight(&bau_desc->distribution); + if (locals) { + stat->s_ntarglocaluvhub++; + stat->s_ntargremoteuvhub += (hubs - 1); } else - stat->s_requestor--; - if (completion_status == FLUSH_COMPLETE && try > 1) - stat->s_retriesok++; - else if (completion_status == FLUSH_GIVEUP) { - stat->s_giveup++; - return 1; + stat->s_ntargremoteuvhub += hubs; + + stat->s_ntarguvhub += hubs; + + if (hubs >= 16) + stat->s_ntarguvhub16++; + else if (hubs >= 8) + stat->s_ntarguvhub8++; + else if (hubs >= 4) + stat->s_ntarguvhub4++; + else if (hubs >= 2) + stat->s_ntarguvhub2++; + else + stat->s_ntarguvhub1++; +} + +/* + * Translate a cpu mask to the uvhub distribution mask in the BAU + * activation descriptor. + */ +static int set_distrib_bits(struct cpumask *flush_mask, struct bau_control *bcp, + struct bau_desc *bau_desc, int *localsp, int *remotesp) +{ + int cpu; + int pnode; + int cnt = 0; + struct hub_and_pnode *hpp; + + for_each_cpu(cpu, flush_mask) { + /* + * 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 a local memory array. + */ + hpp = &bcp->socket_master->thp[cpu]; + pnode = hpp->pnode - bcp->partition_base_pnode; + bau_uvhub_set(pnode, &bau_desc->distribution); + cnt++; + if (hpp->uvhub == bcp->uvhub) + (*localsp)++; + else + (*remotesp)++; } + if (!cnt) + return 1; return 0; } -/** - * uv_flush_tlb_others - globally purge translation cache of a virtual - * address or all TLB's +/* + * globally purge translation cache of a virtual address or all TLB's * @cpumask: mask of all cpu's in which the address is to be removed * @mm: mm_struct containing virtual address range * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu) @@ -696,20 +925,16 @@ int uv_flush_send_and_wait(struct bau_desc *bau_desc, * done. The returned pointer is valid till preemption is re-enabled. */ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask, - struct mm_struct *mm, - unsigned long va, unsigned int cpu) + struct mm_struct *mm, unsigned long va, + unsigned int cpu) { 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) @@ -720,20 +945,8 @@ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask, /* bau was disabled due to slow response */ if (bcp->baudisabled) { - /* the cpu that disabled it must re-enable it */ - if (bcp->set_bau_off) { - if (get_cycles() >= bcp->set_bau_on_time) { - stat->s_bau_reenabled++; - baudisabled = 0; - for_each_present_cpu(tcpu) { - tbcp = &per_cpu(bau_control, tcpu); - tbcp->baudisabled = 0; - tbcp->period_requests = 0; - tbcp->period_time = 0; - } - } - } - return cpumask; + if (check_enable(bcp, stat)) + return cpumask; } /* @@ -744,59 +957,20 @@ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask, flush_mask = (struct cpumask *)per_cpu(uv_flush_tlb_mask, cpu); /* don't actually do a shootdown of the local cpu */ cpumask_andnot(flush_mask, cpumask, cpumask_of(cpu)); + if (cpu_isset(cpu, *cpumask)) stat->s_ntargself++; bau_desc = bcp->descriptor_base; - bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu; + bau_desc += ITEMS_PER_DESC * bcp->uvhub_cpu; bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE); - - for_each_cpu(tcpu, flush_mask) { - /* - * 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++; - } - if ((locals + remotes) == 0) + if (set_distrib_bits(flush_mask, bcp, bau_desc, &locals, &remotes)) return NULL; - stat->s_requestor++; - stat->s_ntargcpu += remotes + locals; - stat->s_ntargremotes += remotes; - stat->s_ntarglocals += locals; - remotes = bau_uvhub_weight(&bau_desc->distribution); - /* uvhub statistics */ - hubs = bau_uvhub_weight(&bau_desc->distribution); - if (locals) { - stat->s_ntarglocaluvhub++; - stat->s_ntargremoteuvhub += (hubs - 1); - } else - stat->s_ntargremoteuvhub += hubs; - stat->s_ntarguvhub += hubs; - if (hubs >= 16) - stat->s_ntarguvhub16++; - else if (hubs >= 8) - stat->s_ntarguvhub8++; - else if (hubs >= 4) - stat->s_ntarguvhub4++; - else if (hubs >= 2) - stat->s_ntarguvhub2++; - else - stat->s_ntarguvhub1++; + record_send_statistics(stat, locals, hubs, remotes, bau_desc); bau_desc->payload.address = va; bau_desc->payload.sending_cpu = cpu; - /* * uv_flush_send_and_wait returns 0 if all cpu's were messaged, * or 1 if it gave up and the original cpumask should be returned. @@ -825,26 +999,31 @@ void uv_bau_message_interrupt(struct pt_regs *regs) { int count = 0; cycles_t time_start; - struct bau_payload_queue_entry *msg; + struct bau_pq_entry *msg; struct bau_control *bcp; struct ptc_stats *stat; struct msg_desc msgdesc; time_start = get_cycles(); + bcp = &per_cpu(bau_control, smp_processor_id()); stat = bcp->statp; - msgdesc.va_queue_first = bcp->va_queue_first; - msgdesc.va_queue_last = bcp->va_queue_last; + + msgdesc.queue_first = bcp->queue_first; + msgdesc.queue_last = bcp->queue_last; + msg = bcp->bau_msg_head; - while (msg->sw_ack_vector) { + while (msg->swack_vec) { count++; - msgdesc.msg_slot = msg - msgdesc.va_queue_first; - msgdesc.sw_ack_slot = ffs(msg->sw_ack_vector) - 1; + + msgdesc.msg_slot = msg - msgdesc.queue_first; + msgdesc.swack_slot = ffs(msg->swack_vec) - 1; msgdesc.msg = msg; - uv_bau_process_message(&msgdesc, bcp); + bau_process_message(&msgdesc, bcp); + msg++; - if (msg > msgdesc.va_queue_last) - msg = msgdesc.va_queue_first; + if (msg > msgdesc.queue_last) + msg = msgdesc.queue_first; bcp->bau_msg_head = msg; } stat->d_time += (get_cycles() - time_start); @@ -852,18 +1031,17 @@ void uv_bau_message_interrupt(struct pt_regs *regs) stat->d_nomsg++; else if (count > 1) stat->d_multmsg++; + ack_APIC_irq(); } /* - * uv_enable_timeouts - * - * Each target uvhub (i.e. a uvhub that has no cpu's) needs to have + * Each target uvhub (i.e. a uvhub that has cpu's) needs to have * shootdown message timeouts enabled. The timeout does not cause * an interrupt, but causes an error message to be returned to * the sender. */ -static void __init uv_enable_timeouts(void) +static void __init enable_timeouts(void) { int uvhub; int nuvhubs; @@ -877,47 +1055,44 @@ static void __init uv_enable_timeouts(void) continue; pnode = uv_blade_to_pnode(uvhub); - mmr_image = - uv_read_global_mmr64(pnode, UVH_LB_BAU_MISC_CONTROL); + mmr_image = read_mmr_misc_control(pnode); /* * Set the timeout period and then lock it in, in three * steps; captures and locks in the period. * * To program the period, the SOFT_ACK_MODE must be off. */ - mmr_image &= ~((unsigned long)1 << - UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT); - uv_write_global_mmr64 - (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image); + mmr_image &= ~(1L << SOFTACK_MSHIFT); + write_mmr_misc_control(pnode, mmr_image); /* * Set the 4-bit period. */ - mmr_image &= ~((unsigned long)0xf << - UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT); - mmr_image |= (UV_INTD_SOFT_ACK_TIMEOUT_PERIOD << - UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT); - uv_write_global_mmr64 - (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image); + mmr_image &= ~((unsigned long)0xf << SOFTACK_PSHIFT); + mmr_image |= (SOFTACK_TIMEOUT_PERIOD << SOFTACK_PSHIFT); + write_mmr_misc_control(pnode, mmr_image); /* + * UV1: * Subsequent reversals of the timebase bit (3) cause an * immediate timeout of one or all INTD resources as * indicated in bits 2:0 (7 causes all of them to timeout). */ - mmr_image |= ((unsigned long)1 << - UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT); - uv_write_global_mmr64 - (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image); + mmr_image |= (1L << SOFTACK_MSHIFT); + if (is_uv2_hub()) { + mmr_image |= (1L << UV2_LEG_SHFT); + mmr_image |= (1L << UV2_EXT_SHFT); + } + write_mmr_misc_control(pnode, mmr_image); } } -static void *uv_ptc_seq_start(struct seq_file *file, loff_t *offset) +static void *ptc_seq_start(struct seq_file *file, loff_t *offset) { if (*offset < num_possible_cpus()) return offset; return NULL; } -static void *uv_ptc_seq_next(struct seq_file *file, void *data, loff_t *offset) +static void *ptc_seq_next(struct seq_file *file, void *data, loff_t *offset) { (*offset)++; if (*offset < num_possible_cpus()) @@ -925,12 +1100,11 @@ static void *uv_ptc_seq_next(struct seq_file *file, void *data, loff_t *offset) return NULL; } -static void uv_ptc_seq_stop(struct seq_file *file, void *data) +static void ptc_seq_stop(struct seq_file *file, void *data) { } -static inline unsigned long long -microsec_2_cycles(unsigned long microsec) +static inline unsigned long long usec_2_cycles(unsigned long microsec) { unsigned long ns; unsigned long long cyc; @@ -941,29 +1115,27 @@ microsec_2_cycles(unsigned long microsec) } /* - * Display the statistics thru /proc. + * Display the statistics thru /proc/sgi_uv/ptc_statistics * 'data' points to the cpu number + * Note: see the descriptions in stat_description[]. */ -static int uv_ptc_seq_show(struct seq_file *file, void *data) +static int ptc_seq_show(struct seq_file *file, void *data) { struct ptc_stats *stat; int cpu; cpu = *(loff_t *)data; - if (!cpu) { seq_printf(file, "# cpu sent stime self locals remotes ncpus localhub "); seq_printf(file, "remotehub numuvhubs numuvhubs16 numuvhubs8 "); seq_printf(file, - "numuvhubs4 numuvhubs2 numuvhubs1 dto "); - seq_printf(file, - "retries rok resetp resett giveup sto bz throt "); + "numuvhubs4 numuvhubs2 numuvhubs1 dto retries rok "); seq_printf(file, - "sw_ack recv rtime all "); + "resetp resett giveup sto bz throt swack recv rtime "); seq_printf(file, - "one mult none retry canc nocan reset rcan "); + "all one mult none retry canc nocan reset rcan "); seq_printf(file, "disable enable\n"); } @@ -990,8 +1162,7 @@ static int uv_ptc_seq_show(struct seq_file *file, void *data) /* destination side statistics */ seq_printf(file, "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ", - uv_read_global_mmr64(uv_cpu_to_pnode(cpu), - UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE), + read_gmmr_sw_ack(uv_cpu_to_pnode(cpu)), stat->d_requestee, cycles_2_us(stat->d_time), stat->d_alltlb, stat->d_onetlb, stat->d_multmsg, stat->d_nomsg, stat->d_retries, stat->d_canceled, @@ -1000,7 +1171,6 @@ static int uv_ptc_seq_show(struct seq_file *file, void *data) seq_printf(file, "%ld %ld\n", stat->s_bau_disabled, stat->s_bau_reenabled); } - return 0; } @@ -1008,18 +1178,18 @@ static int uv_ptc_seq_show(struct seq_file *file, void *data) * Display the tunables thru debugfs */ static ssize_t tunables_read(struct file *file, char __user *userbuf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { char *buf; int ret; buf = kasprintf(GFP_KERNEL, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n", - "max_bau_concurrent plugged_delay plugsb4reset", + "max_concur plugged_delay plugsb4reset", "timeoutsb4reset ipi_reset_limit complete_threshold", "congested_response_us congested_reps congested_period", - max_bau_concurrent, plugged_delay, plugsb4reset, + max_concurr, plugged_delay, plugsb4reset, timeoutsb4reset, ipi_reset_limit, complete_threshold, - congested_response_us, congested_reps, congested_period); + congested_respns_us, congested_reps, congested_period); if (!buf) return -ENOMEM; @@ -1030,13 +1200,16 @@ static ssize_t tunables_read(struct file *file, char __user *userbuf, } /* - * -1: resetf the statistics + * handle a write to /proc/sgi_uv/ptc_statistics + * -1: reset the statistics * 0: display meaning of the statistics */ -static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user, - size_t count, loff_t *data) +static ssize_t ptc_proc_write(struct file *file, const char __user *user, + size_t count, loff_t *data) { int cpu; + int i; + int elements; long input_arg; char optstr[64]; struct ptc_stats *stat; @@ -1046,79 +1219,18 @@ static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user, if (copy_from_user(optstr, user, count)) return -EFAULT; optstr[count - 1] = '\0'; + if (strict_strtol(optstr, 10, &input_arg) < 0) { printk(KERN_DEBUG "%s is invalid\n", optstr); return -EINVAL; } if (input_arg == 0) { + elements = sizeof(stat_description)/sizeof(*stat_description); printk(KERN_DEBUG "# cpu: cpu number\n"); printk(KERN_DEBUG "Sender statistics:\n"); - printk(KERN_DEBUG - "sent: number of shootdown messages sent\n"); - printk(KERN_DEBUG - "stime: time spent sending messages\n"); - printk(KERN_DEBUG - "numuvhubs: number of hubs targeted with shootdown\n"); - printk(KERN_DEBUG - "numuvhubs16: number times 16 or more hubs targeted\n"); - printk(KERN_DEBUG - "numuvhubs8: number times 8 or more hubs targeted\n"); - printk(KERN_DEBUG - "numuvhubs4: number times 4 or more hubs targeted\n"); - printk(KERN_DEBUG - "numuvhubs2: number times 2 or more hubs targeted\n"); - printk(KERN_DEBUG - "numuvhubs1: number times 1 hub targeted\n"); - printk(KERN_DEBUG - "numcpus: number of cpus targeted with shootdown\n"); - printk(KERN_DEBUG - "dto: number of destination timeouts\n"); - printk(KERN_DEBUG - "retries: destination timeout retries sent\n"); - printk(KERN_DEBUG - "rok: : destination timeouts successfully retried\n"); - printk(KERN_DEBUG - "resetp: ipi-style resource resets for plugs\n"); - printk(KERN_DEBUG - "resett: ipi-style resource resets for timeouts\n"); - printk(KERN_DEBUG - "giveup: fall-backs to ipi-style shootdowns\n"); - printk(KERN_DEBUG - "sto: number of source timeouts\n"); - printk(KERN_DEBUG - "bz: number of stay-busy's\n"); - printk(KERN_DEBUG - "throt: number times spun in throttle\n"); - printk(KERN_DEBUG "Destination side statistics:\n"); - printk(KERN_DEBUG - "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n"); - printk(KERN_DEBUG - "recv: shootdown messages received\n"); - printk(KERN_DEBUG - "rtime: time spent processing messages\n"); - printk(KERN_DEBUG - "all: shootdown all-tlb messages\n"); - printk(KERN_DEBUG - "one: shootdown one-tlb messages\n"); - printk(KERN_DEBUG - "mult: interrupts that found multiple messages\n"); - printk(KERN_DEBUG - "none: interrupts that found no messages\n"); - printk(KERN_DEBUG - "retry: number of retry messages processed\n"); - printk(KERN_DEBUG - "canc: number messages canceled by retries\n"); - printk(KERN_DEBUG - "nocan: number retries that found nothing to cancel\n"); - printk(KERN_DEBUG - "reset: number of ipi-style reset requests processed\n"); - printk(KERN_DEBUG - "rcan: number messages canceled by reset requests\n"); - printk(KERN_DEBUG - "disable: number times use of the BAU was disabled\n"); - printk(KERN_DEBUG - "enable: number times use of the BAU was re-enabled\n"); + for (i = 0; i < elements; i++) + printk(KERN_DEBUG "%s\n", stat_description[i]); } else if (input_arg == -1) { for_each_present_cpu(cpu) { stat = &per_cpu(ptcstats, cpu); @@ -1145,27 +1257,18 @@ static int local_atoi(const char *name) } /* - * set the tunables - * 0 values reset them to defaults + * Parse the values written to /sys/kernel/debug/sgi_uv/bau_tunables. + * Zero values reset them to defaults. */ -static ssize_t tunables_write(struct file *file, const char __user *user, - size_t count, loff_t *data) +static int parse_tunables_write(struct bau_control *bcp, char *instr, + int count) { - int cpu; - int cnt = 0; - int val; char *p; char *q; - char instr[64]; - struct bau_control *bcp; - - if (count == 0 || count > sizeof(instr)-1) - return -EINVAL; - if (copy_from_user(instr, user, count)) - return -EFAULT; + int cnt = 0; + int val; + int e = sizeof(tunables) / sizeof(*tunables); - instr[count] = '\0'; - /* count the fields */ p = instr + strspn(instr, WHITESPACE); q = p; for (; *p; p = q + strspn(q, WHITESPACE)) { @@ -1174,8 +1277,8 @@ static ssize_t tunables_write(struct file *file, const char __user *user, if (q == p) break; } - if (cnt != 9) { - printk(KERN_INFO "bau tunable error: should be 9 numbers\n"); + if (cnt != e) { + printk(KERN_INFO "bau tunable error: should be %d values\n", e); return -EINVAL; } @@ -1187,97 +1290,80 @@ static ssize_t tunables_write(struct file *file, const char __user *user, switch (cnt) { case 0: if (val == 0) { - max_bau_concurrent = MAX_BAU_CONCURRENT; - max_bau_concurrent_constant = - MAX_BAU_CONCURRENT; + max_concurr = MAX_BAU_CONCURRENT; + max_concurr_const = MAX_BAU_CONCURRENT; continue; } - bcp = &per_cpu(bau_control, smp_processor_id()); if (val < 1 || val > bcp->cpus_in_uvhub) { printk(KERN_DEBUG "Error: BAU max concurrent %d is invalid\n", val); return -EINVAL; } - max_bau_concurrent = val; - max_bau_concurrent_constant = val; - continue; - case 1: - if (val == 0) - plugged_delay = PLUGGED_DELAY; - else - plugged_delay = val; - continue; - case 2: - if (val == 0) - plugsb4reset = PLUGSB4RESET; - else - plugsb4reset = val; - continue; - case 3: - if (val == 0) - timeoutsb4reset = TIMEOUTSB4RESET; - else - timeoutsb4reset = val; - continue; - case 4: - if (val == 0) - ipi_reset_limit = IPI_RESET_LIMIT; - else - ipi_reset_limit = val; - continue; - case 5: - if (val == 0) - complete_threshold = COMPLETE_THRESHOLD; - else - complete_threshold = val; - continue; - case 6: - if (val == 0) - congested_response_us = CONGESTED_RESPONSE_US; - else - congested_response_us = val; - continue; - case 7: - if (val == 0) - congested_reps = CONGESTED_REPS; - else - congested_reps = val; + max_concurr = val; + max_concurr_const = val; continue; - case 8: + default: if (val == 0) - congested_period = CONGESTED_PERIOD; + *tunables[cnt].tunp = tunables[cnt].deflt; else - congested_period = val; + *tunables[cnt].tunp = val; continue; } if (q == p) break; } + return 0; +} + +/* + * Handle a write to debugfs. (/sys/kernel/debug/sgi_uv/bau_tunables) + */ +static ssize_t tunables_write(struct file *file, const char __user *user, + size_t count, loff_t *data) +{ + int cpu; + int ret; + char instr[100]; + struct bau_control *bcp; + + if (count == 0 || count > sizeof(instr)-1) + return -EINVAL; + if (copy_from_user(instr, user, count)) + return -EFAULT; + + instr[count] = '\0'; + + bcp = &per_cpu(bau_control, smp_processor_id()); + + ret = parse_tunables_write(bcp, instr, count); + if (ret) + return ret; + for_each_present_cpu(cpu) { bcp = &per_cpu(bau_control, cpu); - bcp->max_bau_concurrent = max_bau_concurrent; - bcp->max_bau_concurrent_constant = max_bau_concurrent; - bcp->plugged_delay = plugged_delay; - bcp->plugsb4reset = plugsb4reset; - bcp->timeoutsb4reset = timeoutsb4reset; - bcp->ipi_reset_limit = ipi_reset_limit; - bcp->complete_threshold = complete_threshold; - bcp->congested_response_us = congested_response_us; - bcp->congested_reps = congested_reps; - bcp->congested_period = congested_period; + bcp->max_concurr = max_concurr; + bcp->max_concurr_const = max_concurr; + bcp->plugged_delay = plugged_delay; + bcp->plugsb4reset = plugsb4reset; + bcp->timeoutsb4reset = timeoutsb4reset; + bcp->ipi_reset_limit = ipi_reset_limit; + bcp->complete_threshold = complete_threshold; + bcp->cong_response_us = congested_respns_us; + bcp->cong_reps = congested_reps; + bcp->cong_period = congested_period; } return count; } static const struct seq_operations uv_ptc_seq_ops = { - .start = uv_ptc_seq_start, - .next = uv_ptc_seq_next, - .stop = uv_ptc_seq_stop, - .show = uv_ptc_seq_show + .start = ptc_seq_start, + .next = ptc_seq_next, + .stop = ptc_seq_stop, + .show = ptc_seq_show }; -static int uv_ptc_proc_open(struct inode *inode, struct file *file) +static int ptc_proc_open(struct inode *inode, struct file *file) { return seq_open(file, &uv_ptc_seq_ops); } @@ -1288,9 +1374,9 @@ static int tunables_open(struct inode *inode, struct file *file) } static const struct file_operations proc_uv_ptc_operations = { - .open = uv_ptc_proc_open, + .open = ptc_proc_open, .read = seq_read, - .write = uv_ptc_proc_write, + .write = ptc_proc_write, .llseek = seq_lseek, .release = seq_release, }; @@ -1324,7 +1410,7 @@ static int __init uv_ptc_init(void) return -EINVAL; } tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600, - tunables_dir, NULL, &tunables_fops); + tunables_dir, NULL, &tunables_fops); if (!tunables_file) { printk(KERN_ERR "unable to create debugfs file %s\n", UV_BAU_TUNABLES_FILE); @@ -1336,24 +1422,24 @@ static int __init uv_ptc_init(void) /* * Initialize the sending side's sending buffers. */ -static void -uv_activation_descriptor_init(int node, int pnode, int base_pnode) +static void activation_descriptor_init(int node, int pnode, int base_pnode) { int i; int cpu; unsigned long pa; unsigned long m; unsigned long n; + size_t dsize; struct bau_desc *bau_desc; struct bau_desc *bd2; struct bau_control *bcp; /* - * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR) - * per cpu; and one per cpu on the uvhub (UV_ADP_SIZE) + * each bau_desc is 64 bytes; there are 8 (ITEMS_PER_DESC) + * per cpu; and one per cpu on the uvhub (ADP_SZ) */ - bau_desc = kmalloc_node(sizeof(struct bau_desc) * UV_ADP_SIZE - * UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node); + dsize = sizeof(struct bau_desc) * ADP_SZ * ITEMS_PER_DESC; + bau_desc = kmalloc_node(dsize, GFP_KERNEL, node); BUG_ON(!bau_desc); pa = uv_gpa(bau_desc); /* need the real nasid*/ @@ -1361,27 +1447,25 @@ uv_activation_descriptor_init(int node, int pnode, int base_pnode) 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)); + write_mmr_descriptor_base(pnode, (n << UV_DESC_PSHIFT | m)); /* - * Initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each + * Initializing all 8 (ITEMS_PER_DESC) descriptors for each * cpu even though we only use the first one; one descriptor can * describe a broadcast to 256 uv hubs. */ - for (i = 0, bd2 = bau_desc; i < (UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR); - i++, bd2++) { + for (i = 0, bd2 = bau_desc; i < (ADP_SZ * ITEMS_PER_DESC); i++, bd2++) { memset(bd2, 0, sizeof(struct bau_desc)); - bd2->header.sw_ack_flag = 1; + bd2->header.swack_flag = 1; /* * 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_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; + 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; /* * all others need to be set to zero: * fairness chaining multilevel count replied_to @@ -1401,57 +1485,55 @@ uv_activation_descriptor_init(int node, int pnode, int base_pnode) * - node is first node (kernel memory notion) on the uvhub * - pnode is the uvhub's physical identifier */ -static void -uv_payload_queue_init(int node, int pnode) +static void pq_init(int node, int pnode) { - int pn; int cpu; + size_t plsize; char *cp; - unsigned long pa; - struct bau_payload_queue_entry *pqp; - struct bau_payload_queue_entry *pqp_malloc; + void *vp; + unsigned long pn; + unsigned long first; + unsigned long pn_first; + unsigned long last; + struct bau_pq_entry *pqp; struct bau_control *bcp; - pqp = kmalloc_node((DEST_Q_SIZE + 1) - * sizeof(struct bau_payload_queue_entry), - GFP_KERNEL, node); + plsize = (DEST_Q_SIZE + 1) * sizeof(struct bau_pq_entry); + vp = kmalloc_node(plsize, GFP_KERNEL, node); + pqp = (struct bau_pq_entry *)vp; BUG_ON(!pqp); - pqp_malloc = pqp; cp = (char *)pqp + 31; - pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5); + pqp = (struct bau_pq_entry *)(((unsigned long)cp >> 5) << 5); for_each_present_cpu(cpu) { if (pnode != uv_cpu_to_pnode(cpu)) continue; /* for every cpu on this pnode: */ bcp = &per_cpu(bau_control, cpu); - bcp->va_queue_first = pqp; - bcp->bau_msg_head = pqp; - bcp->va_queue_last = pqp + (DEST_Q_SIZE - 1); + bcp->queue_first = pqp; + bcp->bau_msg_head = pqp; + bcp->queue_last = pqp + (DEST_Q_SIZE - 1); } /* * need the pnode of where the memory was really allocated */ - pa = uv_gpa(pqp); - pn = pa >> uv_nshift; - uv_write_global_mmr64(pnode, - UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST, - ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) | - uv_physnodeaddr(pqp)); - uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL, - uv_physnodeaddr(pqp)); - uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST, - (unsigned long) - uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1))); + pn = uv_gpa(pqp) >> uv_nshift; + first = uv_physnodeaddr(pqp); + pn_first = ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) | first; + last = uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1)); + write_mmr_payload_first(pnode, pn_first); + write_mmr_payload_tail(pnode, first); + write_mmr_payload_last(pnode, last); + /* in effect, all msg_type's are set to MSG_NOOP */ - memset(pqp, 0, sizeof(struct bau_payload_queue_entry) * DEST_Q_SIZE); + memset(pqp, 0, sizeof(struct bau_pq_entry) * DEST_Q_SIZE); } /* * Initialization of each UV hub's structures */ -static void __init uv_init_uvhub(int uvhub, int vector, int base_pnode) +static void __init init_uvhub(int uvhub, int vector, int base_pnode) { int node; int pnode; @@ -1459,24 +1541,24 @@ static void __init uv_init_uvhub(int uvhub, int vector, int base_pnode) node = uvhub_to_first_node(uvhub); pnode = uv_blade_to_pnode(uvhub); - uv_activation_descriptor_init(node, pnode, base_pnode); - uv_payload_queue_init(node, pnode); + + activation_descriptor_init(node, pnode, base_pnode); + + pq_init(node, pnode); /* * 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, - ((apicid << 32) | vector)); + write_mmr_data_config(pnode, ((apicid << 32) | vector)); } /* * We will set BAU_MISC_CONTROL with a timeout period. * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT. - * So the destination timeout period has be be calculated from them. + * So the destination timeout period has to be calculated from them. */ -static int -calculate_destination_timeout(void) +static int calculate_destination_timeout(void) { unsigned long mmr_image; int mult1; @@ -1486,73 +1568,92 @@ calculate_destination_timeout(void) int ret; unsigned long ts_ns; - mult1 = UV_INTD_SOFT_ACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK; - mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL); - index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK; - mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT); - mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK; - base = timeout_base_ns[index]; - ts_ns = base * mult1 * mult2; - ret = ts_ns / 1000; + if (is_uv1_hub()) { + mult1 = SOFTACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK; + mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL); + index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK; + mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT); + mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK; + base = timeout_base_ns[index]; + ts_ns = base * mult1 * mult2; + ret = ts_ns / 1000; + } else { + /* 4 bits 0/1 for 10/80us, 3 bits of multiplier */ + mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL); + mmr_image = (mmr_image & UV_SA_MASK) >> UV_SA_SHFT; + if (mmr_image & (1L << UV2_ACK_UNITS_SHFT)) + mult1 = 80; + else + mult1 = 10; + base = mmr_image & UV2_ACK_MASK; + ret = mult1 * base; + } return ret; } +static void __init init_per_cpu_tunables(void) +{ + int cpu; + struct bau_control *bcp; + + for_each_present_cpu(cpu) { + bcp = &per_cpu(bau_control, cpu); + bcp->baudisabled = 0; + bcp->statp = &per_cpu(ptcstats, cpu); + /* time interval to catch a hardware stay-busy bug */ + bcp->timeout_interval = usec_2_cycles(2*timeout_us); + bcp->max_concurr = max_concurr; + bcp->max_concurr_const = max_concurr; + bcp->plugged_delay = plugged_delay; + bcp->plugsb4reset = plugsb4reset; + bcp->timeoutsb4reset = timeoutsb4reset; + bcp->ipi_reset_limit = ipi_reset_limit; + bcp->complete_threshold = complete_threshold; + bcp->cong_response_us = congested_respns_us; + bcp->cong_reps = congested_reps; + bcp->cong_period = congested_period; + } +} + /* - * initialize the bau_control structure for each cpu + * Scan all cpus to collect blade and socket summaries. */ -static int __init uv_init_per_cpu(int nuvhubs, int base_part_pnode) +static int __init get_cpu_topology(int base_pnode, + struct uvhub_desc *uvhub_descs, + unsigned char *uvhub_mask) { - int i; int cpu; - int tcpu; int pnode; int uvhub; - int have_hmaster; - short socket = 0; - unsigned short socket_mask; - unsigned char *uvhub_mask; + int socket; struct bau_control *bcp; struct uvhub_desc *bdp; struct socket_desc *sdp; - struct bau_control *hmaster = NULL; - struct bau_control *smaster = NULL; - struct socket_desc { - short num_cpus; - short cpu_number[MAX_CPUS_PER_SOCKET]; - }; - struct uvhub_desc { - unsigned short socket_mask; - short num_cpus; - short uvhub; - short pnode; - struct socket_desc socket[2]; - }; - struct uvhub_desc *uvhub_descs; - - timeout_us = calculate_destination_timeout(); - uvhub_descs = kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL); - memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc)); - uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL); for_each_present_cpu(cpu) { 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) { + if ((pnode - base_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); + cpu, pnode, base_pnode, UV_DISTRIBUTION_SIZE); return 1; } + bcp->osnode = cpu_to_node(cpu); - bcp->partition_base_pnode = uv_partition_base_pnode; + bcp->partition_base_pnode = base_pnode; + uvhub = uv_cpu_hub_info(cpu)->numa_blade_id; *(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8)); bdp = &uvhub_descs[uvhub]; + bdp->num_cpus++; bdp->uvhub = uvhub; bdp->pnode = pnode; + /* kludge: 'assuming' one node per socket, and assuming that disabling a socket just leaves a gap in node numbers */ socket = bcp->osnode & 1; @@ -1561,84 +1662,129 @@ static int __init uv_init_per_cpu(int nuvhubs, int base_part_pnode) sdp->cpu_number[sdp->num_cpus] = cpu; sdp->num_cpus++; if (sdp->num_cpus > MAX_CPUS_PER_SOCKET) { - printk(KERN_EMERG "%d cpus per socket invalid\n", sdp->num_cpus); + printk(KERN_EMERG "%d cpus per socket invalid\n", + sdp->num_cpus); return 1; } } + return 0; +} + +/* + * Each socket is to get a local array of pnodes/hubs. + */ +static void make_per_cpu_thp(struct bau_control *smaster) +{ + int cpu; + size_t hpsz = sizeof(struct hub_and_pnode) * num_possible_cpus(); + + smaster->thp = kmalloc_node(hpsz, GFP_KERNEL, smaster->osnode); + memset(smaster->thp, 0, hpsz); + for_each_present_cpu(cpu) { + smaster->thp[cpu].pnode = uv_cpu_hub_info(cpu)->pnode; + smaster->thp[cpu].uvhub = uv_cpu_hub_info(cpu)->numa_blade_id; + } +} + +/* + * Initialize all the per_cpu information for the cpu's on a given socket, + * given what has been gathered into the socket_desc struct. + * And reports the chosen hub and socket masters back to the caller. + */ +static int scan_sock(struct socket_desc *sdp, struct uvhub_desc *bdp, + struct bau_control **smasterp, + struct bau_control **hmasterp) +{ + int i; + int cpu; + struct bau_control *bcp; + + for (i = 0; i < sdp->num_cpus; i++) { + cpu = sdp->cpu_number[i]; + bcp = &per_cpu(bau_control, cpu); + bcp->cpu = cpu; + if (i == 0) { + *smasterp = bcp; + if (!(*hmasterp)) + *hmasterp = bcp; + } + bcp->cpus_in_uvhub = bdp->num_cpus; + bcp->cpus_in_socket = sdp->num_cpus; + bcp->socket_master = *smasterp; + bcp->uvhub = bdp->uvhub; + bcp->uvhub_master = *hmasterp; + bcp->uvhub_cpu = uv_cpu_hub_info(cpu)->blade_processor_id; + if (bcp->uvhub_cpu >= MAX_CPUS_PER_UVHUB) { + printk(KERN_EMERG "%d cpus per uvhub invalid\n", + bcp->uvhub_cpu); + return 1; + } + } + return 0; +} + +/* + * Summarize the blade and socket topology into the per_cpu structures. + */ +static int __init summarize_uvhub_sockets(int nuvhubs, + struct uvhub_desc *uvhub_descs, + unsigned char *uvhub_mask) +{ + int socket; + int uvhub; + unsigned short socket_mask; + for (uvhub = 0; uvhub < nuvhubs; uvhub++) { + struct uvhub_desc *bdp; + struct bau_control *smaster = NULL; + struct bau_control *hmaster = NULL; + if (!(*(uvhub_mask + (uvhub/8)) & (1 << (uvhub%8)))) continue; - have_hmaster = 0; + bdp = &uvhub_descs[uvhub]; socket_mask = bdp->socket_mask; socket = 0; while (socket_mask) { - if (!(socket_mask & 1)) - goto nextsocket; - sdp = &bdp->socket[socket]; - for (i = 0; i < sdp->num_cpus; i++) { - cpu = sdp->cpu_number[i]; - bcp = &per_cpu(bau_control, cpu); - bcp->cpu = cpu; - if (i == 0) { - smaster = bcp; - if (!have_hmaster) { - have_hmaster++; - hmaster = bcp; - } - } - bcp->cpus_in_uvhub = bdp->num_cpus; - bcp->cpus_in_socket = sdp->num_cpus; - bcp->socket_master = smaster; - bcp->uvhub = bdp->uvhub; - bcp->uvhub_master = hmaster; - bcp->uvhub_cpu = uv_cpu_hub_info(cpu)-> - blade_processor_id; - if (bcp->uvhub_cpu >= MAX_CPUS_PER_UVHUB) { - printk(KERN_EMERG - "%d cpus per uvhub invalid\n", - bcp->uvhub_cpu); + struct socket_desc *sdp; + if ((socket_mask & 1)) { + sdp = &bdp->socket[socket]; + if (scan_sock(sdp, bdp, &smaster, &hmaster)) return 1; - } } -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; - } + make_per_cpu_thp(smaster); } } + return 0; +} + +/* + * initialize the bau_control structure for each cpu + */ +static int __init init_per_cpu(int nuvhubs, int base_part_pnode) +{ + unsigned char *uvhub_mask; + void *vp; + struct uvhub_desc *uvhub_descs; + + timeout_us = calculate_destination_timeout(); + + vp = kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL); + uvhub_descs = (struct uvhub_desc *)vp; + memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc)); + uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL); + + if (get_cpu_topology(base_part_pnode, uvhub_descs, uvhub_mask)) + return 1; + + if (summarize_uvhub_sockets(nuvhubs, uvhub_descs, uvhub_mask)) + return 1; + kfree(uvhub_descs); kfree(uvhub_mask); - for_each_present_cpu(cpu) { - bcp = &per_cpu(bau_control, cpu); - bcp->baudisabled = 0; - bcp->statp = &per_cpu(ptcstats, cpu); - /* time interval to catch a hardware stay-busy bug */ - bcp->timeout_interval = microsec_2_cycles(2*timeout_us); - bcp->max_bau_concurrent = max_bau_concurrent; - bcp->max_bau_concurrent_constant = max_bau_concurrent; - bcp->plugged_delay = plugged_delay; - bcp->plugsb4reset = plugsb4reset; - bcp->timeoutsb4reset = timeoutsb4reset; - bcp->ipi_reset_limit = ipi_reset_limit; - bcp->complete_threshold = complete_threshold; - bcp->congested_response_us = congested_response_us; - bcp->congested_reps = congested_reps; - bcp->congested_period = congested_period; - } + init_per_cpu_tunables(); return 0; } @@ -1651,8 +1797,9 @@ static int __init uv_bau_init(void) int pnode; int nuvhubs; int cur_cpu; + int cpus; int vector; - unsigned long mmr; + cpumask_var_t *mask; if (!is_uv_system()) return 0; @@ -1660,24 +1807,25 @@ static int __init uv_bau_init(void) if (nobau) return 0; - for_each_possible_cpu(cur_cpu) - zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu), - GFP_KERNEL, cpu_to_node(cur_cpu)); + for_each_possible_cpu(cur_cpu) { + mask = &per_cpu(uv_flush_tlb_mask, cur_cpu); + zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cur_cpu)); + } uv_nshift = uv_hub_info->m_val; uv_mmask = (1UL << uv_hub_info->m_val) - 1; nuvhubs = uv_num_possible_blades(); spin_lock_init(&disable_lock); - congested_cycles = microsec_2_cycles(congested_response_us); + congested_cycles = usec_2_cycles(congested_respns_us); - uv_partition_base_pnode = 0x7fffffff; + uv_base_pnode = 0x7fffffff; 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); + cpus = uv_blade_nr_possible_cpus(uvhub); + if (cpus && (uv_blade_to_pnode(uvhub) < uv_base_pnode)) + uv_base_pnode = uv_blade_to_pnode(uvhub); } - if (uv_init_per_cpu(nuvhubs, uv_partition_base_pnode)) { + if (init_per_cpu(nuvhubs, uv_base_pnode)) { nobau = 1; return 0; } @@ -1685,21 +1833,21 @@ static int __init uv_bau_init(void) vector = UV_BAU_MESSAGE; for_each_possible_blade(uvhub) if (uv_blade_nr_possible_cpus(uvhub)) - uv_init_uvhub(uvhub, vector, uv_partition_base_pnode); + init_uvhub(uvhub, vector, uv_base_pnode); - uv_enable_timeouts(); + enable_timeouts(); alloc_intr_gate(vector, uv_bau_message_intr1); for_each_possible_blade(uvhub) { if (uv_blade_nr_possible_cpus(uvhub)) { + unsigned long val; + unsigned long mmr; pnode = uv_blade_to_pnode(uvhub); /* INIT the bau */ - uv_write_global_mmr64(pnode, - UVH_LB_BAU_SB_ACTIVATION_CONTROL, - ((unsigned long)1 << 63)); + val = 1L << 63; + write_gmmr_activation(pnode, val); mmr = 1; /* should be 1 to broadcast to both sockets */ - uv_write_global_mmr64(pnode, UVH_BAU_DATA_BROADCAST, - mmr); + write_mmr_data_broadcast(pnode, mmr); } } |