Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1 | /* |
| 2 | * SGI UltraViolet TLB flush routines. |
| 3 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 4 | * (c) 2008-2010 Cliff Wickman <cpw@sgi.com>, SGI. |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 5 | * |
| 6 | * This code is released under the GNU General Public License version 2 or |
| 7 | * later. |
| 8 | */ |
Jeremy Fitzhardinge | aef8f5b | 2008-10-14 21:43:43 -0700 | [diff] [blame] | 9 | #include <linux/seq_file.h> |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 10 | #include <linux/proc_fs.h> |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 11 | #include <linux/debugfs.h> |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 12 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 14 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 15 | #include <asm/mmu_context.h> |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 16 | #include <asm/uv/uv.h> |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 17 | #include <asm/uv/uv_mmrs.h> |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 18 | #include <asm/uv/uv_hub.h> |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 19 | #include <asm/uv/uv_bau.h> |
Ingo Molnar | 7b6aa33 | 2009-02-17 13:58:15 +0100 | [diff] [blame] | 20 | #include <asm/apic.h> |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 21 | #include <asm/idle.h> |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 22 | #include <asm/tsc.h> |
Cliff Wickman | 99dd871 | 2008-08-19 12:51:59 -0500 | [diff] [blame] | 23 | #include <asm/irq_vectors.h> |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 24 | #include <asm/timer.h> |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 25 | |
Cliff Wickman | 12a6611 | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 26 | /* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */ |
| 27 | static int timeout_base_ns[] = { |
| 28 | 20, |
| 29 | 160, |
| 30 | 1280, |
| 31 | 10240, |
| 32 | 81920, |
| 33 | 655360, |
| 34 | 5242880, |
| 35 | 167772160 |
| 36 | }; |
| 37 | static int timeout_us; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 38 | static int nobau; |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 39 | static int baudisabled; |
| 40 | static spinlock_t disable_lock; |
| 41 | static cycles_t congested_cycles; |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 42 | |
| 43 | /* tunables: */ |
| 44 | static int max_bau_concurrent = MAX_BAU_CONCURRENT; |
| 45 | static int max_bau_concurrent_constant = MAX_BAU_CONCURRENT; |
| 46 | static int plugged_delay = PLUGGED_DELAY; |
| 47 | static int plugsb4reset = PLUGSB4RESET; |
| 48 | static int timeoutsb4reset = TIMEOUTSB4RESET; |
| 49 | static int ipi_reset_limit = IPI_RESET_LIMIT; |
| 50 | static int complete_threshold = COMPLETE_THRESHOLD; |
| 51 | static int congested_response_us = CONGESTED_RESPONSE_US; |
| 52 | static int congested_reps = CONGESTED_REPS; |
| 53 | static int congested_period = CONGESTED_PERIOD; |
| 54 | static struct dentry *tunables_dir; |
| 55 | static struct dentry *tunables_file; |
| 56 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 57 | static int __init setup_nobau(char *arg) |
| 58 | { |
| 59 | nobau = 1; |
| 60 | return 0; |
| 61 | } |
| 62 | early_param("nobau", setup_nobau); |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 63 | |
Cliff Wickman | 94ca8e4 | 2009-04-14 10:56:48 -0500 | [diff] [blame] | 64 | /* base pnode in this partition */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 65 | static int uv_partition_base_pnode __read_mostly; |
| 66 | /* position of pnode (which is nasid>>1): */ |
| 67 | static int uv_nshift __read_mostly; |
| 68 | static unsigned long uv_mmask __read_mostly; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 69 | |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 70 | static DEFINE_PER_CPU(struct ptc_stats, ptcstats); |
| 71 | static DEFINE_PER_CPU(struct bau_control, bau_control); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 72 | static DEFINE_PER_CPU(cpumask_var_t, uv_flush_tlb_mask); |
| 73 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 74 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 75 | * Determine the first node on a uvhub. 'Nodes' are used for kernel |
| 76 | * memory allocation. |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 77 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 78 | static int __init uvhub_to_first_node(int uvhub) |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 79 | { |
| 80 | int node, b; |
| 81 | |
| 82 | for_each_online_node(node) { |
| 83 | b = uv_node_to_blade_id(node); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 84 | if (uvhub == b) |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 85 | return node; |
| 86 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 87 | return -1; |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 91 | * Determine the apicid of the first cpu on a uvhub. |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 92 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 93 | static int __init uvhub_to_first_apicid(int uvhub) |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 94 | { |
| 95 | int cpu; |
| 96 | |
| 97 | for_each_present_cpu(cpu) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 98 | if (uvhub == uv_cpu_to_blade_id(cpu)) |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 99 | return per_cpu(x86_cpu_to_apicid, cpu); |
| 100 | return -1; |
| 101 | } |
| 102 | |
| 103 | /* |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 104 | * Free a software acknowledge hardware resource by clearing its Pending |
| 105 | * bit. This will return a reply to the sender. |
| 106 | * If the message has timed out, a reply has already been sent by the |
| 107 | * hardware but the resource has not been released. In that case our |
| 108 | * clear of the Timeout bit (as well) will free the resource. No reply will |
| 109 | * be sent (the hardware will only do one reply per message). |
| 110 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 111 | static inline void uv_reply_to_message(struct msg_desc *mdp, |
| 112 | struct bau_control *bcp) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 113 | { |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 114 | unsigned long dw; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 115 | struct bau_payload_queue_entry *msg; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 116 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 117 | msg = mdp->msg; |
| 118 | if (!msg->canceled) { |
| 119 | dw = (msg->sw_ack_vector << UV_SW_ACK_NPENDING) | |
| 120 | msg->sw_ack_vector; |
| 121 | uv_write_local_mmr( |
| 122 | UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, dw); |
| 123 | } |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 124 | msg->replied_to = 1; |
| 125 | msg->sw_ack_vector = 0; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Process the receipt of a RETRY message |
| 130 | */ |
| 131 | static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, |
| 132 | struct bau_control *bcp) |
| 133 | { |
| 134 | int i; |
| 135 | int cancel_count = 0; |
| 136 | int slot2; |
| 137 | unsigned long msg_res; |
| 138 | unsigned long mmr = 0; |
| 139 | struct bau_payload_queue_entry *msg; |
| 140 | struct bau_payload_queue_entry *msg2; |
| 141 | struct ptc_stats *stat; |
| 142 | |
| 143 | msg = mdp->msg; |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 144 | stat = bcp->statp; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 145 | stat->d_retries++; |
| 146 | /* |
| 147 | * cancel any message from msg+1 to the retry itself |
| 148 | */ |
| 149 | for (msg2 = msg+1, i = 0; i < DEST_Q_SIZE; msg2++, i++) { |
| 150 | if (msg2 > mdp->va_queue_last) |
| 151 | msg2 = mdp->va_queue_first; |
| 152 | if (msg2 == msg) |
| 153 | break; |
| 154 | |
| 155 | /* same conditions for cancellation as uv_do_reset */ |
| 156 | if ((msg2->replied_to == 0) && (msg2->canceled == 0) && |
| 157 | (msg2->sw_ack_vector) && ((msg2->sw_ack_vector & |
| 158 | msg->sw_ack_vector) == 0) && |
| 159 | (msg2->sending_cpu == msg->sending_cpu) && |
| 160 | (msg2->msg_type != MSG_NOOP)) { |
| 161 | slot2 = msg2 - mdp->va_queue_first; |
| 162 | mmr = uv_read_local_mmr |
| 163 | (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE); |
Cliff Wickman | 39847e7 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 164 | msg_res = msg2->sw_ack_vector; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 165 | /* |
| 166 | * This is a message retry; clear the resources held |
| 167 | * by the previous message only if they timed out. |
| 168 | * If it has not timed out we have an unexpected |
| 169 | * situation to report. |
| 170 | */ |
Cliff Wickman | 39847e7 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 171 | if (mmr & (msg_res << UV_SW_ACK_NPENDING)) { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 172 | /* |
| 173 | * is the resource timed out? |
| 174 | * make everyone ignore the cancelled message. |
| 175 | */ |
| 176 | msg2->canceled = 1; |
| 177 | stat->d_canceled++; |
| 178 | cancel_count++; |
| 179 | uv_write_local_mmr( |
| 180 | UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, |
Cliff Wickman | 39847e7 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 181 | (msg_res << UV_SW_ACK_NPENDING) | |
| 182 | msg_res); |
| 183 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 184 | } |
| 185 | } |
| 186 | if (!cancel_count) |
| 187 | stat->d_nocanceled++; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Do all the things a cpu should do for a TLB shootdown message. |
| 192 | * Other cpu's may come here at the same time for this message. |
| 193 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 194 | static void uv_bau_process_message(struct msg_desc *mdp, |
| 195 | struct bau_control *bcp) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 196 | { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 197 | int msg_ack_count; |
| 198 | short socket_ack_count = 0; |
| 199 | struct ptc_stats *stat; |
| 200 | struct bau_payload_queue_entry *msg; |
| 201 | struct bau_control *smaster = bcp->socket_master; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 202 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 203 | /* |
| 204 | * This must be a normal message, or retry of a normal message |
| 205 | */ |
| 206 | msg = mdp->msg; |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 207 | stat = bcp->statp; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 208 | if (msg->address == TLB_FLUSH_ALL) { |
| 209 | local_flush_tlb(); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 210 | stat->d_alltlb++; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 211 | } else { |
| 212 | __flush_tlb_one(msg->address); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 213 | stat->d_onetlb++; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 214 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 215 | stat->d_requestee++; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 216 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 217 | /* |
| 218 | * One cpu on each uvhub has the additional job on a RETRY |
| 219 | * of releasing the resource held by the message that is |
| 220 | * being retried. That message is identified by sending |
| 221 | * cpu number. |
| 222 | */ |
| 223 | if (msg->msg_type == MSG_RETRY && bcp == bcp->uvhub_master) |
| 224 | uv_bau_process_retry_msg(mdp, bcp); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 225 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 226 | /* |
| 227 | * This is a sw_ack message, so we have to reply to it. |
| 228 | * Count each responding cpu on the socket. This avoids |
| 229 | * pinging the count's cache line back and forth between |
| 230 | * the sockets. |
| 231 | */ |
| 232 | socket_ack_count = atomic_add_short_return(1, (struct atomic_short *) |
| 233 | &smaster->socket_acknowledge_count[mdp->msg_slot]); |
| 234 | if (socket_ack_count == bcp->cpus_in_socket) { |
| 235 | /* |
| 236 | * Both sockets dump their completed count total into |
| 237 | * the message's count. |
| 238 | */ |
| 239 | smaster->socket_acknowledge_count[mdp->msg_slot] = 0; |
| 240 | msg_ack_count = atomic_add_short_return(socket_ack_count, |
| 241 | (struct atomic_short *)&msg->acknowledge_count); |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 242 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 243 | if (msg_ack_count == bcp->cpus_in_uvhub) { |
| 244 | /* |
| 245 | * All cpus in uvhub saw it; reply |
| 246 | */ |
| 247 | uv_reply_to_message(mdp, bcp); |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 248 | } |
| 249 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 250 | |
| 251 | return; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 255 | * Determine the first cpu on a uvhub. |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 256 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 257 | static int uvhub_to_first_cpu(int uvhub) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 258 | { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 259 | int cpu; |
| 260 | for_each_present_cpu(cpu) |
| 261 | if (uvhub == uv_cpu_to_blade_id(cpu)) |
| 262 | return cpu; |
| 263 | return -1; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 264 | } |
| 265 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 266 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 267 | * Last resort when we get a large number of destination timeouts is |
| 268 | * to clear resources held by a given cpu. |
| 269 | * Do this with IPI so that all messages in the BAU message queue |
| 270 | * can be identified by their nonzero sw_ack_vector field. |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 271 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 272 | * This is entered for a single cpu on the uvhub. |
| 273 | * The sender want's this uvhub to free a specific message's |
| 274 | * sw_ack resources. |
| 275 | */ |
| 276 | static void |
| 277 | uv_do_reset(void *ptr) |
| 278 | { |
| 279 | int i; |
| 280 | int slot; |
| 281 | int count = 0; |
| 282 | unsigned long mmr; |
| 283 | unsigned long msg_res; |
| 284 | struct bau_control *bcp; |
| 285 | struct reset_args *rap; |
| 286 | struct bau_payload_queue_entry *msg; |
| 287 | struct ptc_stats *stat; |
| 288 | |
| 289 | bcp = &per_cpu(bau_control, smp_processor_id()); |
| 290 | rap = (struct reset_args *)ptr; |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 291 | stat = bcp->statp; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 292 | stat->d_resets++; |
| 293 | |
| 294 | /* |
| 295 | * We're looking for the given sender, and |
| 296 | * will free its sw_ack resource. |
| 297 | * If all cpu's finally responded after the timeout, its |
| 298 | * message 'replied_to' was set. |
| 299 | */ |
| 300 | for (msg = bcp->va_queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) { |
| 301 | /* uv_do_reset: same conditions for cancellation as |
| 302 | uv_bau_process_retry_msg() */ |
| 303 | if ((msg->replied_to == 0) && |
| 304 | (msg->canceled == 0) && |
| 305 | (msg->sending_cpu == rap->sender) && |
| 306 | (msg->sw_ack_vector) && |
| 307 | (msg->msg_type != MSG_NOOP)) { |
| 308 | /* |
| 309 | * make everyone else ignore this message |
| 310 | */ |
| 311 | msg->canceled = 1; |
| 312 | slot = msg - bcp->va_queue_first; |
| 313 | count++; |
| 314 | /* |
| 315 | * only reset the resource if it is still pending |
| 316 | */ |
| 317 | mmr = uv_read_local_mmr |
| 318 | (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE); |
Cliff Wickman | 39847e7 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 319 | msg_res = msg->sw_ack_vector; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 320 | if (mmr & msg_res) { |
| 321 | stat->d_rcanceled++; |
| 322 | uv_write_local_mmr( |
| 323 | UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, |
Cliff Wickman | 39847e7 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 324 | (msg_res << UV_SW_ACK_NPENDING) | |
| 325 | msg_res); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 326 | } |
| 327 | } |
| 328 | } |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | /* |
| 333 | * Use IPI to get all target uvhubs to release resources held by |
| 334 | * a given sending cpu number. |
| 335 | */ |
| 336 | static void uv_reset_with_ipi(struct bau_target_uvhubmask *distribution, |
| 337 | int sender) |
| 338 | { |
| 339 | int uvhub; |
| 340 | int cpu; |
| 341 | cpumask_t mask; |
| 342 | struct reset_args reset_args; |
| 343 | |
| 344 | reset_args.sender = sender; |
| 345 | |
| 346 | cpus_clear(mask); |
| 347 | /* find a single cpu for each uvhub in this distribution mask */ |
| 348 | for (uvhub = 0; |
| 349 | uvhub < sizeof(struct bau_target_uvhubmask) * BITSPERBYTE; |
| 350 | uvhub++) { |
| 351 | if (!bau_uvhub_isset(uvhub, distribution)) |
| 352 | continue; |
| 353 | /* find a cpu for this uvhub */ |
| 354 | cpu = uvhub_to_first_cpu(uvhub); |
| 355 | cpu_set(cpu, mask); |
| 356 | } |
| 357 | /* IPI all cpus; Preemption is already disabled */ |
| 358 | smp_call_function_many(&mask, uv_do_reset, (void *)&reset_args, 1); |
| 359 | return; |
| 360 | } |
| 361 | |
| 362 | static inline unsigned long |
| 363 | cycles_2_us(unsigned long long cyc) |
| 364 | { |
| 365 | unsigned long long ns; |
| 366 | unsigned long us; |
| 367 | ns = (cyc * per_cpu(cyc2ns, smp_processor_id())) |
| 368 | >> CYC2NS_SCALE_FACTOR; |
| 369 | us = ns / 1000; |
| 370 | return us; |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * wait for all cpus on this hub to finish their sends and go quiet |
| 375 | * leaves uvhub_quiesce set so that no new broadcasts are started by |
| 376 | * bau_flush_send_and_wait() |
| 377 | */ |
| 378 | static inline void |
| 379 | quiesce_local_uvhub(struct bau_control *hmaster) |
| 380 | { |
| 381 | atomic_add_short_return(1, (struct atomic_short *) |
| 382 | &hmaster->uvhub_quiesce); |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * mark this quiet-requestor as done |
| 387 | */ |
| 388 | static inline void |
| 389 | end_uvhub_quiesce(struct bau_control *hmaster) |
| 390 | { |
| 391 | atomic_add_short_return(-1, (struct atomic_short *) |
| 392 | &hmaster->uvhub_quiesce); |
| 393 | } |
| 394 | |
| 395 | /* |
| 396 | * Wait for completion of a broadcast software ack message |
| 397 | * return COMPLETE, RETRY(PLUGGED or TIMEOUT) or GIVEUP |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 398 | */ |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 399 | static int uv_wait_completion(struct bau_desc *bau_desc, |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 400 | unsigned long mmr_offset, int right_shift, int this_cpu, |
| 401 | struct bau_control *bcp, struct bau_control *smaster, long try) |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 402 | { |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 403 | unsigned long descriptor_status; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 404 | cycles_t ttime; |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 405 | struct ptc_stats *stat = bcp->statp; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 406 | struct bau_control *hmaster; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 407 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 408 | hmaster = bcp->uvhub_master; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 409 | |
| 410 | /* spin on the status MMR, waiting for it to go idle */ |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 411 | while ((descriptor_status = (((unsigned long) |
| 412 | uv_read_local_mmr(mmr_offset) >> |
| 413 | right_shift) & UV_ACT_STATUS_MASK)) != |
| 414 | DESC_STATUS_IDLE) { |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 415 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 416 | * Our software ack messages may be blocked because there are |
| 417 | * no swack resources available. As long as none of them |
| 418 | * has timed out hardware will NACK our message and its |
| 419 | * state will stay IDLE. |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 420 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 421 | if (descriptor_status == DESC_STATUS_SOURCE_TIMEOUT) { |
| 422 | stat->s_stimeout++; |
| 423 | return FLUSH_GIVEUP; |
| 424 | } else if (descriptor_status == |
| 425 | DESC_STATUS_DESTINATION_TIMEOUT) { |
| 426 | stat->s_dtimeout++; |
| 427 | ttime = get_cycles(); |
| 428 | |
| 429 | /* |
| 430 | * Our retries may be blocked by all destination |
| 431 | * swack resources being consumed, and a timeout |
| 432 | * pending. In that case hardware returns the |
| 433 | * ERROR that looks like a destination timeout. |
| 434 | */ |
Cliff Wickman | 12a6611 | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 435 | if (cycles_2_us(ttime - bcp->send_message) < |
| 436 | timeout_us) { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 437 | bcp->conseccompletes = 0; |
| 438 | return FLUSH_RETRY_PLUGGED; |
| 439 | } |
| 440 | |
| 441 | bcp->conseccompletes = 0; |
| 442 | return FLUSH_RETRY_TIMEOUT; |
| 443 | } else { |
| 444 | /* |
| 445 | * descriptor_status is still BUSY |
| 446 | */ |
| 447 | cpu_relax(); |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 448 | } |
| 449 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 450 | bcp->conseccompletes++; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 451 | return FLUSH_COMPLETE; |
| 452 | } |
| 453 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 454 | static inline cycles_t |
| 455 | sec_2_cycles(unsigned long sec) |
| 456 | { |
| 457 | unsigned long ns; |
| 458 | cycles_t cyc; |
| 459 | |
| 460 | ns = sec * 1000000000; |
| 461 | cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id())); |
| 462 | return cyc; |
| 463 | } |
| 464 | |
| 465 | /* |
| 466 | * conditionally add 1 to *v, unless *v is >= u |
| 467 | * return 0 if we cannot add 1 to *v because it is >= u |
| 468 | * return 1 if we can add 1 to *v because it is < u |
| 469 | * the add is atomic |
| 470 | * |
| 471 | * This is close to atomic_add_unless(), but this allows the 'u' value |
| 472 | * to be lowered below the current 'v'. atomic_add_unless can only stop |
| 473 | * on equal. |
| 474 | */ |
| 475 | static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u) |
| 476 | { |
| 477 | spin_lock(lock); |
| 478 | if (atomic_read(v) >= u) { |
| 479 | spin_unlock(lock); |
| 480 | return 0; |
| 481 | } |
| 482 | atomic_inc(v); |
| 483 | spin_unlock(lock); |
| 484 | return 1; |
| 485 | } |
| 486 | |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 487 | /* |
Cliff Wickman | f6d8a56 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 488 | * Our retries are blocked by all destination swack resources being |
| 489 | * in use, and a timeout is pending. In that case hardware immediately |
| 490 | * returns the ERROR that looks like a destination timeout. |
| 491 | */ |
| 492 | static void |
| 493 | destination_plugged(struct bau_desc *bau_desc, struct bau_control *bcp, |
| 494 | struct bau_control *hmaster, struct ptc_stats *stat) |
| 495 | { |
| 496 | udelay(bcp->plugged_delay); |
| 497 | bcp->plugged_tries++; |
| 498 | if (bcp->plugged_tries >= bcp->plugsb4reset) { |
| 499 | bcp->plugged_tries = 0; |
| 500 | quiesce_local_uvhub(hmaster); |
| 501 | spin_lock(&hmaster->queue_lock); |
| 502 | uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu); |
| 503 | spin_unlock(&hmaster->queue_lock); |
| 504 | end_uvhub_quiesce(hmaster); |
| 505 | bcp->ipi_attempts++; |
| 506 | stat->s_resets_plug++; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | static void |
| 511 | destination_timeout(struct bau_desc *bau_desc, struct bau_control *bcp, |
| 512 | struct bau_control *hmaster, struct ptc_stats *stat) |
| 513 | { |
| 514 | hmaster->max_bau_concurrent = 1; |
| 515 | bcp->timeout_tries++; |
| 516 | if (bcp->timeout_tries >= bcp->timeoutsb4reset) { |
| 517 | bcp->timeout_tries = 0; |
| 518 | quiesce_local_uvhub(hmaster); |
| 519 | spin_lock(&hmaster->queue_lock); |
| 520 | uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu); |
| 521 | spin_unlock(&hmaster->queue_lock); |
| 522 | end_uvhub_quiesce(hmaster); |
| 523 | bcp->ipi_attempts++; |
| 524 | stat->s_resets_timeout++; |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | /* |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 529 | * Completions are taking a very long time due to a congested numalink |
| 530 | * network. |
| 531 | */ |
| 532 | static void |
| 533 | disable_for_congestion(struct bau_control *bcp, struct ptc_stats *stat) |
| 534 | { |
| 535 | int tcpu; |
| 536 | struct bau_control *tbcp; |
| 537 | |
| 538 | /* let only one cpu do this disabling */ |
| 539 | spin_lock(&disable_lock); |
| 540 | if (!baudisabled && bcp->period_requests && |
| 541 | ((bcp->period_time / bcp->period_requests) > congested_cycles)) { |
| 542 | /* it becomes this cpu's job to turn on the use of the |
| 543 | BAU again */ |
| 544 | baudisabled = 1; |
| 545 | bcp->set_bau_off = 1; |
| 546 | bcp->set_bau_on_time = get_cycles() + |
| 547 | sec_2_cycles(bcp->congested_period); |
| 548 | stat->s_bau_disabled++; |
| 549 | for_each_present_cpu(tcpu) { |
| 550 | tbcp = &per_cpu(bau_control, tcpu); |
| 551 | tbcp->baudisabled = 1; |
| 552 | } |
| 553 | } |
| 554 | spin_unlock(&disable_lock); |
| 555 | } |
| 556 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 557 | /** |
| 558 | * uv_flush_send_and_wait |
| 559 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 560 | * Send a broadcast and wait for it to complete. |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 561 | * |
Cliff Wickman | f6d8a56 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 562 | * The flush_mask contains the cpus the broadcast is to be sent to including |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 563 | * cpus that are on the local uvhub. |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 564 | * |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 565 | * Returns 0 if all flushing represented in the mask was done. |
| 566 | * Returns 1 if it gives up entirely and the original cpu mask is to be |
| 567 | * returned to the kernel. |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 568 | */ |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 569 | int uv_flush_send_and_wait(struct bau_desc *bau_desc, |
| 570 | struct cpumask *flush_mask, struct bau_control *bcp) |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 571 | { |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 572 | int right_shift; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 573 | int completion_status = 0; |
| 574 | int seq_number = 0; |
| 575 | long try = 0; |
| 576 | int cpu = bcp->uvhub_cpu; |
| 577 | int this_cpu = bcp->cpu; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 578 | unsigned long mmr_offset; |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 579 | unsigned long index; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 580 | cycles_t time1; |
| 581 | cycles_t time2; |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 582 | cycles_t elapsed; |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 583 | struct ptc_stats *stat = bcp->statp; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 584 | struct bau_control *smaster = bcp->socket_master; |
| 585 | struct bau_control *hmaster = bcp->uvhub_master; |
| 586 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 587 | if (!atomic_inc_unless_ge(&hmaster->uvhub_lock, |
| 588 | &hmaster->active_descriptor_count, |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 589 | hmaster->max_bau_concurrent)) { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 590 | stat->s_throttles++; |
| 591 | do { |
| 592 | cpu_relax(); |
| 593 | } while (!atomic_inc_unless_ge(&hmaster->uvhub_lock, |
| 594 | &hmaster->active_descriptor_count, |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 595 | hmaster->max_bau_concurrent)); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 596 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 597 | while (hmaster->uvhub_quiesce) |
| 598 | cpu_relax(); |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 599 | |
| 600 | if (cpu < UV_CPUS_PER_ACT_STATUS) { |
| 601 | mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0; |
| 602 | right_shift = cpu * UV_ACT_STATUS_SIZE; |
| 603 | } else { |
| 604 | mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1; |
| 605 | right_shift = |
| 606 | ((cpu - UV_CPUS_PER_ACT_STATUS) * UV_ACT_STATUS_SIZE); |
| 607 | } |
| 608 | time1 = get_cycles(); |
| 609 | do { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 610 | if (try == 0) { |
Cliff Wickman | 7fba1bc | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 611 | bau_desc->header.msg_type = MSG_REGULAR; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 612 | seq_number = bcp->message_number++; |
| 613 | } else { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 614 | bau_desc->header.msg_type = MSG_RETRY; |
| 615 | stat->s_retry_messages++; |
| 616 | } |
| 617 | bau_desc->header.sequence = seq_number; |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 618 | index = (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 619 | bcp->uvhub_cpu; |
| 620 | bcp->send_message = get_cycles(); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 621 | uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 622 | try++; |
| 623 | completion_status = uv_wait_completion(bau_desc, mmr_offset, |
| 624 | right_shift, this_cpu, bcp, smaster, try); |
| 625 | |
| 626 | if (completion_status == FLUSH_RETRY_PLUGGED) { |
Cliff Wickman | f6d8a56 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 627 | destination_plugged(bau_desc, bcp, hmaster, stat); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 628 | } else if (completion_status == FLUSH_RETRY_TIMEOUT) { |
Cliff Wickman | f6d8a56 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 629 | destination_timeout(bau_desc, bcp, hmaster, stat); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 630 | } |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 631 | if (bcp->ipi_attempts >= bcp->ipi_reset_limit) { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 632 | bcp->ipi_attempts = 0; |
| 633 | completion_status = FLUSH_GIVEUP; |
| 634 | break; |
| 635 | } |
| 636 | cpu_relax(); |
| 637 | } while ((completion_status == FLUSH_RETRY_PLUGGED) || |
| 638 | (completion_status == FLUSH_RETRY_TIMEOUT)); |
| 639 | time2 = get_cycles(); |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 640 | bcp->plugged_tries = 0; |
| 641 | bcp->timeout_tries = 0; |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 642 | if ((completion_status == FLUSH_COMPLETE) && |
| 643 | (bcp->conseccompletes > bcp->complete_threshold) && |
| 644 | (hmaster->max_bau_concurrent < |
| 645 | hmaster->max_bau_concurrent_constant)) |
| 646 | hmaster->max_bau_concurrent++; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 647 | while (hmaster->uvhub_quiesce) |
| 648 | cpu_relax(); |
| 649 | atomic_dec(&hmaster->active_descriptor_count); |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 650 | if (time2 > time1) { |
| 651 | elapsed = time2 - time1; |
| 652 | stat->s_time += elapsed; |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 653 | if ((completion_status == FLUSH_COMPLETE) && (try == 1)) { |
| 654 | bcp->period_requests++; |
| 655 | bcp->period_time += elapsed; |
| 656 | if ((elapsed > congested_cycles) && |
| 657 | (bcp->period_requests > bcp->congested_reps)) { |
| 658 | disable_for_congestion(bcp, stat); |
| 659 | } |
| 660 | } |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 661 | } else |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 662 | stat->s_requestor--; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 663 | if (completion_status == FLUSH_COMPLETE && try > 1) |
| 664 | stat->s_retriesok++; |
| 665 | else if (completion_status == FLUSH_GIVEUP) { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 666 | stat->s_giveup++; |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 667 | return 1; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 668 | } |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 669 | return 0; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 670 | } |
| 671 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 672 | /** |
| 673 | * uv_flush_tlb_others - globally purge translation cache of a virtual |
| 674 | * address or all TLB's |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 675 | * @cpumask: mask of all cpu's in which the address is to be removed |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 676 | * @mm: mm_struct containing virtual address range |
| 677 | * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu) |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 678 | * @cpu: the current cpu |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 679 | * |
| 680 | * This is the entry point for initiating any UV global TLB shootdown. |
| 681 | * |
| 682 | * Purges the translation caches of all specified processors of the given |
| 683 | * virtual address, or purges all TLB's on specified processors. |
| 684 | * |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 685 | * The caller has derived the cpumask from the mm_struct. This function |
| 686 | * is called only if there are bits set in the mask. (e.g. flush_tlb_page()) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 687 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 688 | * The cpumask is converted into a uvhubmask of the uvhubs containing |
| 689 | * those cpus. |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 690 | * |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 691 | * Note that this function should be called with preemption disabled. |
| 692 | * |
| 693 | * Returns NULL if all remote flushing was done. |
| 694 | * Returns pointer to cpumask if some remote flushing remains to be |
| 695 | * done. The returned pointer is valid till preemption is re-enabled. |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 696 | */ |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 697 | const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask, |
| 698 | struct mm_struct *mm, |
| 699 | unsigned long va, unsigned int cpu) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 700 | { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 701 | int tcpu; |
| 702 | int uvhub; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 703 | int locals = 0; |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 704 | int remotes = 0; |
| 705 | int hubs = 0; |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 706 | struct bau_desc *bau_desc; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 707 | struct cpumask *flush_mask; |
| 708 | struct ptc_stats *stat; |
| 709 | struct bau_control *bcp; |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 710 | struct bau_control *tbcp; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 711 | |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 712 | /* kernel was booted 'nobau' */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 713 | if (nobau) |
| 714 | return cpumask; |
| 715 | |
| 716 | bcp = &per_cpu(bau_control, cpu); |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 717 | stat = bcp->statp; |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 718 | |
| 719 | /* bau was disabled due to slow response */ |
| 720 | if (bcp->baudisabled) { |
| 721 | /* the cpu that disabled it must re-enable it */ |
| 722 | if (bcp->set_bau_off) { |
| 723 | if (get_cycles() >= bcp->set_bau_on_time) { |
| 724 | stat->s_bau_reenabled++; |
| 725 | baudisabled = 0; |
| 726 | for_each_present_cpu(tcpu) { |
| 727 | tbcp = &per_cpu(bau_control, tcpu); |
| 728 | tbcp->baudisabled = 0; |
| 729 | tbcp->period_requests = 0; |
| 730 | tbcp->period_time = 0; |
| 731 | } |
| 732 | } |
| 733 | } |
| 734 | return cpumask; |
| 735 | } |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 736 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 737 | /* |
| 738 | * Each sending cpu has a per-cpu mask which it fills from the caller's |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 739 | * cpu mask. All cpus are converted to uvhubs and copied to the |
| 740 | * activation descriptor. |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 741 | */ |
| 742 | flush_mask = (struct cpumask *)per_cpu(uv_flush_tlb_mask, cpu); |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 743 | /* don't actually do a shootdown of the local cpu */ |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 744 | cpumask_andnot(flush_mask, cpumask, cpumask_of(cpu)); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 745 | if (cpu_isset(cpu, *cpumask)) |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 746 | stat->s_ntargself++; |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 747 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 748 | bau_desc = bcp->descriptor_base; |
| 749 | bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 750 | bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE); |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 751 | |
| 752 | /* cpu statistics */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 753 | for_each_cpu(tcpu, flush_mask) { |
| 754 | uvhub = uv_cpu_to_blade_id(tcpu); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 755 | bau_uvhub_set(uvhub, &bau_desc->distribution); |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 756 | if (uvhub == bcp->uvhub) |
| 757 | locals++; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 758 | else |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 759 | remotes++; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 760 | } |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 761 | if ((locals + remotes) == 0) |
| 762 | return NULL; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 763 | stat->s_requestor++; |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 764 | stat->s_ntargcpu += remotes + locals; |
| 765 | stat->s_ntargremotes += remotes; |
| 766 | stat->s_ntarglocals += locals; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 767 | remotes = bau_uvhub_weight(&bau_desc->distribution); |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 768 | |
| 769 | /* uvhub statistics */ |
| 770 | hubs = bau_uvhub_weight(&bau_desc->distribution); |
| 771 | if (locals) { |
| 772 | stat->s_ntarglocaluvhub++; |
| 773 | stat->s_ntargremoteuvhub += (hubs - 1); |
| 774 | } else |
| 775 | stat->s_ntargremoteuvhub += hubs; |
| 776 | stat->s_ntarguvhub += hubs; |
| 777 | if (hubs >= 16) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 778 | stat->s_ntarguvhub16++; |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 779 | else if (hubs >= 8) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 780 | stat->s_ntarguvhub8++; |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 781 | else if (hubs >= 4) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 782 | stat->s_ntarguvhub4++; |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 783 | else if (hubs >= 2) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 784 | stat->s_ntarguvhub2++; |
| 785 | else |
| 786 | stat->s_ntarguvhub1++; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 787 | |
| 788 | bau_desc->payload.address = va; |
Tejun Heo | bdbcdd4 | 2009-01-21 17:26:06 +0900 | [diff] [blame] | 789 | bau_desc->payload.sending_cpu = cpu; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 790 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 791 | /* |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 792 | * uv_flush_send_and_wait returns 0 if all cpu's were messaged, |
| 793 | * or 1 if it gave up and the original cpumask should be returned. |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 794 | */ |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 795 | if (!uv_flush_send_and_wait(bau_desc, flush_mask, bcp)) |
| 796 | return NULL; |
| 797 | else |
| 798 | return cpumask; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | /* |
| 802 | * The BAU message interrupt comes here. (registered by set_intr_gate) |
| 803 | * See entry_64.S |
| 804 | * |
| 805 | * We received a broadcast assist message. |
| 806 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 807 | * Interrupts are disabled; this interrupt could represent |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 808 | * the receipt of several messages. |
| 809 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 810 | * All cores/threads on this hub get this interrupt. |
| 811 | * The last one to see it does the software ack. |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 812 | * (the resource will not be freed until noninterruptable cpus see this |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 813 | * interrupt; hardware may timeout the s/w ack and reply ERROR) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 814 | */ |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 815 | void uv_bau_message_interrupt(struct pt_regs *regs) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 816 | { |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 817 | int count = 0; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 818 | cycles_t time_start; |
| 819 | struct bau_payload_queue_entry *msg; |
| 820 | struct bau_control *bcp; |
| 821 | struct ptc_stats *stat; |
| 822 | struct msg_desc msgdesc; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 823 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 824 | time_start = get_cycles(); |
| 825 | bcp = &per_cpu(bau_control, smp_processor_id()); |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 826 | stat = bcp->statp; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 827 | msgdesc.va_queue_first = bcp->va_queue_first; |
| 828 | msgdesc.va_queue_last = bcp->va_queue_last; |
| 829 | msg = bcp->bau_msg_head; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 830 | while (msg->sw_ack_vector) { |
| 831 | count++; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 832 | msgdesc.msg_slot = msg - msgdesc.va_queue_first; |
| 833 | msgdesc.sw_ack_slot = ffs(msg->sw_ack_vector) - 1; |
| 834 | msgdesc.msg = msg; |
| 835 | uv_bau_process_message(&msgdesc, bcp); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 836 | msg++; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 837 | if (msg > msgdesc.va_queue_last) |
| 838 | msg = msgdesc.va_queue_first; |
| 839 | bcp->bau_msg_head = msg; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 840 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 841 | stat->d_time += (get_cycles() - time_start); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 842 | if (!count) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 843 | stat->d_nomsg++; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 844 | else if (count > 1) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 845 | stat->d_multmsg++; |
| 846 | ack_APIC_irq(); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 847 | } |
| 848 | |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 849 | /* |
| 850 | * uv_enable_timeouts |
| 851 | * |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 852 | * Each target uvhub (i.e. a uvhub that has no cpu's) needs to have |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 853 | * shootdown message timeouts enabled. The timeout does not cause |
| 854 | * an interrupt, but causes an error message to be returned to |
| 855 | * the sender. |
| 856 | */ |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 857 | static void uv_enable_timeouts(void) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 858 | { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 859 | int uvhub; |
| 860 | int nuvhubs; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 861 | int pnode; |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 862 | unsigned long mmr_image; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 863 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 864 | nuvhubs = uv_num_possible_blades(); |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 865 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 866 | for (uvhub = 0; uvhub < nuvhubs; uvhub++) { |
| 867 | if (!uv_blade_nr_possible_cpus(uvhub)) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 868 | continue; |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 869 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 870 | pnode = uv_blade_to_pnode(uvhub); |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 871 | mmr_image = |
| 872 | uv_read_global_mmr64(pnode, UVH_LB_BAU_MISC_CONTROL); |
| 873 | /* |
| 874 | * Set the timeout period and then lock it in, in three |
| 875 | * steps; captures and locks in the period. |
| 876 | * |
| 877 | * To program the period, the SOFT_ACK_MODE must be off. |
| 878 | */ |
| 879 | mmr_image &= ~((unsigned long)1 << |
Jack Steiner | 6f4edd6 | 2010-03-10 14:44:58 -0600 | [diff] [blame] | 880 | UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT); |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 881 | uv_write_global_mmr64 |
| 882 | (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image); |
| 883 | /* |
| 884 | * Set the 4-bit period. |
| 885 | */ |
| 886 | mmr_image &= ~((unsigned long)0xf << |
Jack Steiner | 6f4edd6 | 2010-03-10 14:44:58 -0600 | [diff] [blame] | 887 | UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT); |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 888 | mmr_image |= (UV_INTD_SOFT_ACK_TIMEOUT_PERIOD << |
Jack Steiner | 6f4edd6 | 2010-03-10 14:44:58 -0600 | [diff] [blame] | 889 | UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT); |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 890 | uv_write_global_mmr64 |
| 891 | (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image); |
| 892 | /* |
| 893 | * Subsequent reversals of the timebase bit (3) cause an |
| 894 | * immediate timeout of one or all INTD resources as |
| 895 | * indicated in bits 2:0 (7 causes all of them to timeout). |
| 896 | */ |
| 897 | mmr_image |= ((unsigned long)1 << |
Jack Steiner | 6f4edd6 | 2010-03-10 14:44:58 -0600 | [diff] [blame] | 898 | UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT); |
Cliff Wickman | c4c4688 | 2009-04-03 08:34:32 -0500 | [diff] [blame] | 899 | uv_write_global_mmr64 |
| 900 | (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 901 | } |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 902 | } |
| 903 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 904 | static void *uv_ptc_seq_start(struct seq_file *file, loff_t *offset) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 905 | { |
| 906 | if (*offset < num_possible_cpus()) |
| 907 | return offset; |
| 908 | return NULL; |
| 909 | } |
| 910 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 911 | static void *uv_ptc_seq_next(struct seq_file *file, void *data, loff_t *offset) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 912 | { |
| 913 | (*offset)++; |
| 914 | if (*offset < num_possible_cpus()) |
| 915 | return offset; |
| 916 | return NULL; |
| 917 | } |
| 918 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 919 | static void uv_ptc_seq_stop(struct seq_file *file, void *data) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 920 | { |
| 921 | } |
| 922 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 923 | static inline unsigned long long |
Cliff Wickman | 12a6611 | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 924 | microsec_2_cycles(unsigned long microsec) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 925 | { |
| 926 | unsigned long ns; |
| 927 | unsigned long long cyc; |
| 928 | |
Cliff Wickman | 12a6611 | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 929 | ns = microsec * 1000; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 930 | cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id())); |
| 931 | return cyc; |
| 932 | } |
| 933 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 934 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 935 | * Display the statistics thru /proc. |
| 936 | * 'data' points to the cpu number |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 937 | */ |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 938 | static int uv_ptc_seq_show(struct seq_file *file, void *data) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 939 | { |
| 940 | struct ptc_stats *stat; |
| 941 | int cpu; |
| 942 | |
| 943 | cpu = *(loff_t *)data; |
| 944 | |
| 945 | if (!cpu) { |
| 946 | seq_printf(file, |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 947 | "# cpu sent stime self locals remotes ncpus localhub "); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 948 | seq_printf(file, |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 949 | "remotehub numuvhubs numuvhubs16 numuvhubs8 "); |
| 950 | seq_printf(file, |
| 951 | "numuvhubs4 numuvhubs2 numuvhubs1 dto "); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 952 | seq_printf(file, |
| 953 | "retries rok resetp resett giveup sto bz throt "); |
| 954 | seq_printf(file, |
| 955 | "sw_ack recv rtime all "); |
| 956 | seq_printf(file, |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 957 | "one mult none retry canc nocan reset rcan "); |
| 958 | seq_printf(file, |
| 959 | "disable enable\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 960 | } |
| 961 | if (cpu < num_possible_cpus() && cpu_online(cpu)) { |
| 962 | stat = &per_cpu(ptcstats, cpu); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 963 | /* source side statistics */ |
| 964 | seq_printf(file, |
| 965 | "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ", |
| 966 | cpu, stat->s_requestor, cycles_2_us(stat->s_time), |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 967 | stat->s_ntargself, stat->s_ntarglocals, |
| 968 | stat->s_ntargremotes, stat->s_ntargcpu, |
| 969 | stat->s_ntarglocaluvhub, stat->s_ntargremoteuvhub, |
| 970 | stat->s_ntarguvhub, stat->s_ntarguvhub16); |
| 971 | seq_printf(file, "%ld %ld %ld %ld %ld ", |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 972 | stat->s_ntarguvhub8, stat->s_ntarguvhub4, |
| 973 | stat->s_ntarguvhub2, stat->s_ntarguvhub1, |
Cliff Wickman | 450a007 | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 974 | stat->s_dtimeout); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 975 | seq_printf(file, "%ld %ld %ld %ld %ld %ld %ld %ld ", |
| 976 | stat->s_retry_messages, stat->s_retriesok, |
| 977 | stat->s_resets_plug, stat->s_resets_timeout, |
| 978 | stat->s_giveup, stat->s_stimeout, |
| 979 | stat->s_busy, stat->s_throttles); |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 980 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 981 | /* destination side statistics */ |
| 982 | seq_printf(file, |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 983 | "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ", |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 984 | uv_read_global_mmr64(uv_cpu_to_pnode(cpu), |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 985 | UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE), |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 986 | stat->d_requestee, cycles_2_us(stat->d_time), |
| 987 | stat->d_alltlb, stat->d_onetlb, stat->d_multmsg, |
| 988 | stat->d_nomsg, stat->d_retries, stat->d_canceled, |
| 989 | stat->d_nocanceled, stat->d_resets, |
| 990 | stat->d_rcanceled); |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 991 | seq_printf(file, "%ld %ld\n", |
| 992 | stat->s_bau_disabled, stat->s_bau_reenabled); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | return 0; |
| 996 | } |
| 997 | |
| 998 | /* |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 999 | * Display the tunables thru debugfs |
| 1000 | */ |
| 1001 | static ssize_t tunables_read(struct file *file, char __user *userbuf, |
| 1002 | size_t count, loff_t *ppos) |
| 1003 | { |
Dan Carpenter | b365a85 | 2010-09-29 10:41:05 +0200 | [diff] [blame] | 1004 | char *buf; |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1005 | int ret; |
| 1006 | |
Dan Carpenter | b365a85 | 2010-09-29 10:41:05 +0200 | [diff] [blame] | 1007 | buf = kasprintf(GFP_KERNEL, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n", |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1008 | "max_bau_concurrent plugged_delay plugsb4reset", |
| 1009 | "timeoutsb4reset ipi_reset_limit complete_threshold", |
| 1010 | "congested_response_us congested_reps congested_period", |
| 1011 | max_bau_concurrent, plugged_delay, plugsb4reset, |
| 1012 | timeoutsb4reset, ipi_reset_limit, complete_threshold, |
| 1013 | congested_response_us, congested_reps, congested_period); |
| 1014 | |
Dan Carpenter | b365a85 | 2010-09-29 10:41:05 +0200 | [diff] [blame] | 1015 | if (!buf) |
| 1016 | return -ENOMEM; |
| 1017 | |
| 1018 | ret = simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); |
| 1019 | kfree(buf); |
| 1020 | return ret; |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1021 | } |
| 1022 | |
| 1023 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1024 | * -1: resetf the statistics |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1025 | * 0: display meaning of the statistics |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1026 | */ |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1027 | static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user, |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1028 | size_t count, loff_t *data) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1029 | { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1030 | int cpu; |
| 1031 | long input_arg; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1032 | char optstr[64]; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1033 | struct ptc_stats *stat; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1034 | |
Cliff Wickman | e7eb872 | 2008-06-23 08:32:25 -0500 | [diff] [blame] | 1035 | if (count == 0 || count > sizeof(optstr)) |
Cliff Wickman | cef5327 | 2008-06-19 11:16:24 -0500 | [diff] [blame] | 1036 | return -EINVAL; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1037 | if (copy_from_user(optstr, user, count)) |
| 1038 | return -EFAULT; |
| 1039 | optstr[count - 1] = '\0'; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1040 | if (strict_strtol(optstr, 10, &input_arg) < 0) { |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1041 | printk(KERN_DEBUG "%s is invalid\n", optstr); |
| 1042 | return -EINVAL; |
| 1043 | } |
| 1044 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1045 | if (input_arg == 0) { |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1046 | printk(KERN_DEBUG "# cpu: cpu number\n"); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1047 | printk(KERN_DEBUG "Sender statistics:\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1048 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1049 | "sent: number of shootdown messages sent\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1050 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1051 | "stime: time spent sending messages\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1052 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1053 | "numuvhubs: number of hubs targeted with shootdown\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1054 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1055 | "numuvhubs16: number times 16 or more hubs targeted\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1056 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1057 | "numuvhubs8: number times 8 or more hubs targeted\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1058 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1059 | "numuvhubs4: number times 4 or more hubs targeted\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1060 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1061 | "numuvhubs2: number times 2 or more hubs targeted\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1062 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1063 | "numuvhubs1: number times 1 hub targeted\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1064 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1065 | "numcpus: number of cpus targeted with shootdown\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1066 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1067 | "dto: number of destination timeouts\n"); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1068 | printk(KERN_DEBUG |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1069 | "retries: destination timeout retries sent\n"); |
| 1070 | printk(KERN_DEBUG |
| 1071 | "rok: : destination timeouts successfully retried\n"); |
| 1072 | printk(KERN_DEBUG |
| 1073 | "resetp: ipi-style resource resets for plugs\n"); |
| 1074 | printk(KERN_DEBUG |
| 1075 | "resett: ipi-style resource resets for timeouts\n"); |
| 1076 | printk(KERN_DEBUG |
| 1077 | "giveup: fall-backs to ipi-style shootdowns\n"); |
| 1078 | printk(KERN_DEBUG |
| 1079 | "sto: number of source timeouts\n"); |
| 1080 | printk(KERN_DEBUG |
| 1081 | "bz: number of stay-busy's\n"); |
| 1082 | printk(KERN_DEBUG |
| 1083 | "throt: number times spun in throttle\n"); |
| 1084 | printk(KERN_DEBUG "Destination side statistics:\n"); |
| 1085 | printk(KERN_DEBUG |
| 1086 | "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n"); |
| 1087 | printk(KERN_DEBUG |
| 1088 | "recv: shootdown messages received\n"); |
| 1089 | printk(KERN_DEBUG |
| 1090 | "rtime: time spent processing messages\n"); |
| 1091 | printk(KERN_DEBUG |
| 1092 | "all: shootdown all-tlb messages\n"); |
| 1093 | printk(KERN_DEBUG |
| 1094 | "one: shootdown one-tlb messages\n"); |
| 1095 | printk(KERN_DEBUG |
| 1096 | "mult: interrupts that found multiple messages\n"); |
| 1097 | printk(KERN_DEBUG |
| 1098 | "none: interrupts that found no messages\n"); |
| 1099 | printk(KERN_DEBUG |
| 1100 | "retry: number of retry messages processed\n"); |
| 1101 | printk(KERN_DEBUG |
| 1102 | "canc: number messages canceled by retries\n"); |
| 1103 | printk(KERN_DEBUG |
| 1104 | "nocan: number retries that found nothing to cancel\n"); |
| 1105 | printk(KERN_DEBUG |
| 1106 | "reset: number of ipi-style reset requests processed\n"); |
| 1107 | printk(KERN_DEBUG |
| 1108 | "rcan: number messages canceled by reset requests\n"); |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1109 | printk(KERN_DEBUG |
| 1110 | "disable: number times use of the BAU was disabled\n"); |
| 1111 | printk(KERN_DEBUG |
| 1112 | "enable: number times use of the BAU was re-enabled\n"); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1113 | } else if (input_arg == -1) { |
| 1114 | for_each_present_cpu(cpu) { |
| 1115 | stat = &per_cpu(ptcstats, cpu); |
| 1116 | memset(stat, 0, sizeof(struct ptc_stats)); |
| 1117 | } |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | return count; |
| 1121 | } |
| 1122 | |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1123 | static int local_atoi(const char *name) |
| 1124 | { |
| 1125 | int val = 0; |
| 1126 | |
| 1127 | for (;; name++) { |
| 1128 | switch (*name) { |
| 1129 | case '0' ... '9': |
| 1130 | val = 10*val+(*name-'0'); |
| 1131 | break; |
| 1132 | default: |
| 1133 | return val; |
| 1134 | } |
| 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | /* |
| 1139 | * set the tunables |
| 1140 | * 0 values reset them to defaults |
| 1141 | */ |
| 1142 | static ssize_t tunables_write(struct file *file, const char __user *user, |
| 1143 | size_t count, loff_t *data) |
| 1144 | { |
| 1145 | int cpu; |
| 1146 | int cnt = 0; |
| 1147 | int val; |
| 1148 | char *p; |
| 1149 | char *q; |
| 1150 | char instr[64]; |
| 1151 | struct bau_control *bcp; |
| 1152 | |
| 1153 | if (count == 0 || count > sizeof(instr)-1) |
| 1154 | return -EINVAL; |
| 1155 | if (copy_from_user(instr, user, count)) |
| 1156 | return -EFAULT; |
| 1157 | |
| 1158 | instr[count] = '\0'; |
| 1159 | /* count the fields */ |
| 1160 | p = instr + strspn(instr, WHITESPACE); |
| 1161 | q = p; |
| 1162 | for (; *p; p = q + strspn(q, WHITESPACE)) { |
| 1163 | q = p + strcspn(p, WHITESPACE); |
| 1164 | cnt++; |
| 1165 | if (q == p) |
| 1166 | break; |
| 1167 | } |
| 1168 | if (cnt != 9) { |
| 1169 | printk(KERN_INFO "bau tunable error: should be 9 numbers\n"); |
| 1170 | return -EINVAL; |
| 1171 | } |
| 1172 | |
| 1173 | p = instr + strspn(instr, WHITESPACE); |
| 1174 | q = p; |
| 1175 | for (cnt = 0; *p; p = q + strspn(q, WHITESPACE), cnt++) { |
| 1176 | q = p + strcspn(p, WHITESPACE); |
| 1177 | val = local_atoi(p); |
| 1178 | switch (cnt) { |
| 1179 | case 0: |
| 1180 | if (val == 0) { |
| 1181 | max_bau_concurrent = MAX_BAU_CONCURRENT; |
| 1182 | max_bau_concurrent_constant = |
| 1183 | MAX_BAU_CONCURRENT; |
| 1184 | continue; |
| 1185 | } |
| 1186 | bcp = &per_cpu(bau_control, smp_processor_id()); |
| 1187 | if (val < 1 || val > bcp->cpus_in_uvhub) { |
| 1188 | printk(KERN_DEBUG |
| 1189 | "Error: BAU max concurrent %d is invalid\n", |
| 1190 | val); |
| 1191 | return -EINVAL; |
| 1192 | } |
| 1193 | max_bau_concurrent = val; |
| 1194 | max_bau_concurrent_constant = val; |
| 1195 | continue; |
| 1196 | case 1: |
| 1197 | if (val == 0) |
| 1198 | plugged_delay = PLUGGED_DELAY; |
| 1199 | else |
| 1200 | plugged_delay = val; |
| 1201 | continue; |
| 1202 | case 2: |
| 1203 | if (val == 0) |
| 1204 | plugsb4reset = PLUGSB4RESET; |
| 1205 | else |
| 1206 | plugsb4reset = val; |
| 1207 | continue; |
| 1208 | case 3: |
| 1209 | if (val == 0) |
| 1210 | timeoutsb4reset = TIMEOUTSB4RESET; |
| 1211 | else |
| 1212 | timeoutsb4reset = val; |
| 1213 | continue; |
| 1214 | case 4: |
| 1215 | if (val == 0) |
| 1216 | ipi_reset_limit = IPI_RESET_LIMIT; |
| 1217 | else |
| 1218 | ipi_reset_limit = val; |
| 1219 | continue; |
| 1220 | case 5: |
| 1221 | if (val == 0) |
| 1222 | complete_threshold = COMPLETE_THRESHOLD; |
| 1223 | else |
| 1224 | complete_threshold = val; |
| 1225 | continue; |
| 1226 | case 6: |
| 1227 | if (val == 0) |
| 1228 | congested_response_us = CONGESTED_RESPONSE_US; |
| 1229 | else |
| 1230 | congested_response_us = val; |
| 1231 | continue; |
| 1232 | case 7: |
| 1233 | if (val == 0) |
| 1234 | congested_reps = CONGESTED_REPS; |
| 1235 | else |
| 1236 | congested_reps = val; |
| 1237 | continue; |
| 1238 | case 8: |
| 1239 | if (val == 0) |
| 1240 | congested_period = CONGESTED_PERIOD; |
| 1241 | else |
| 1242 | congested_period = val; |
| 1243 | continue; |
| 1244 | } |
| 1245 | if (q == p) |
| 1246 | break; |
| 1247 | } |
| 1248 | for_each_present_cpu(cpu) { |
| 1249 | bcp = &per_cpu(bau_control, cpu); |
| 1250 | bcp->max_bau_concurrent = max_bau_concurrent; |
| 1251 | bcp->max_bau_concurrent_constant = max_bau_concurrent; |
| 1252 | bcp->plugged_delay = plugged_delay; |
| 1253 | bcp->plugsb4reset = plugsb4reset; |
| 1254 | bcp->timeoutsb4reset = timeoutsb4reset; |
| 1255 | bcp->ipi_reset_limit = ipi_reset_limit; |
| 1256 | bcp->complete_threshold = complete_threshold; |
| 1257 | bcp->congested_response_us = congested_response_us; |
| 1258 | bcp->congested_reps = congested_reps; |
| 1259 | bcp->congested_period = congested_period; |
| 1260 | } |
| 1261 | return count; |
| 1262 | } |
| 1263 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1264 | static const struct seq_operations uv_ptc_seq_ops = { |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 1265 | .start = uv_ptc_seq_start, |
| 1266 | .next = uv_ptc_seq_next, |
| 1267 | .stop = uv_ptc_seq_stop, |
| 1268 | .show = uv_ptc_seq_show |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1269 | }; |
| 1270 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1271 | static int uv_ptc_proc_open(struct inode *inode, struct file *file) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1272 | { |
| 1273 | return seq_open(file, &uv_ptc_seq_ops); |
| 1274 | } |
| 1275 | |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1276 | static int tunables_open(struct inode *inode, struct file *file) |
| 1277 | { |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1281 | static const struct file_operations proc_uv_ptc_operations = { |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1282 | .open = uv_ptc_proc_open, |
| 1283 | .read = seq_read, |
| 1284 | .write = uv_ptc_proc_write, |
| 1285 | .llseek = seq_lseek, |
| 1286 | .release = seq_release, |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1287 | }; |
| 1288 | |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1289 | static const struct file_operations tunables_fops = { |
| 1290 | .open = tunables_open, |
| 1291 | .read = tunables_read, |
| 1292 | .write = tunables_write, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1293 | .llseek = default_llseek, |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1294 | }; |
| 1295 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1296 | static int __init uv_ptc_init(void) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1297 | { |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1298 | struct proc_dir_entry *proc_uv_ptc; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1299 | |
| 1300 | if (!is_uv_system()) |
| 1301 | return 0; |
| 1302 | |
Alexey Dobriyan | 10f02d11 | 2009-08-23 23:17:27 +0400 | [diff] [blame] | 1303 | proc_uv_ptc = proc_create(UV_PTC_BASENAME, 0444, NULL, |
| 1304 | &proc_uv_ptc_operations); |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1305 | if (!proc_uv_ptc) { |
| 1306 | printk(KERN_ERR "unable to create %s proc entry\n", |
| 1307 | UV_PTC_BASENAME); |
| 1308 | return -EINVAL; |
| 1309 | } |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1310 | |
| 1311 | tunables_dir = debugfs_create_dir(UV_BAU_TUNABLES_DIR, NULL); |
| 1312 | if (!tunables_dir) { |
| 1313 | printk(KERN_ERR "unable to create debugfs directory %s\n", |
| 1314 | UV_BAU_TUNABLES_DIR); |
| 1315 | return -EINVAL; |
| 1316 | } |
| 1317 | tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600, |
| 1318 | tunables_dir, NULL, &tunables_fops); |
| 1319 | if (!tunables_file) { |
| 1320 | printk(KERN_ERR "unable to create debugfs file %s\n", |
| 1321 | UV_BAU_TUNABLES_FILE); |
| 1322 | return -EINVAL; |
| 1323 | } |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1324 | return 0; |
| 1325 | } |
| 1326 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1327 | /* |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1328 | * initialize the sending side's sending buffers |
| 1329 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1330 | static void |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1331 | uv_activation_descriptor_init(int node, int pnode) |
| 1332 | { |
| 1333 | int i; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1334 | int cpu; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1335 | unsigned long pa; |
| 1336 | unsigned long m; |
| 1337 | unsigned long n; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1338 | struct bau_desc *bau_desc; |
| 1339 | struct bau_desc *bd2; |
| 1340 | struct bau_control *bcp; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1341 | |
Cliff Wickman | 0e2595c | 2009-05-20 08:10:57 -0500 | [diff] [blame] | 1342 | /* |
| 1343 | * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1344 | * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per uvhub |
Cliff Wickman | 0e2595c | 2009-05-20 08:10:57 -0500 | [diff] [blame] | 1345 | */ |
Jesper Juhl | 8e5e952 | 2010-11-09 00:08:11 +0100 | [diff] [blame] | 1346 | bau_desc = kmalloc_node(sizeof(struct bau_desc) * UV_ADP_SIZE |
| 1347 | * UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1348 | BUG_ON(!bau_desc); |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1349 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1350 | pa = uv_gpa(bau_desc); /* need the real nasid*/ |
| 1351 | n = pa >> uv_nshift; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1352 | m = pa & uv_mmask; |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1353 | |
Cliff Wickman | 9c26f52 | 2009-06-24 09:41:59 -0500 | [diff] [blame] | 1354 | uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE, |
| 1355 | (n << UV_DESC_BASE_PNODE_SHIFT | m)); |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1356 | |
Cliff Wickman | 0e2595c | 2009-05-20 08:10:57 -0500 | [diff] [blame] | 1357 | /* |
| 1358 | * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each |
| 1359 | * cpu even though we only use the first one; one descriptor can |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1360 | * describe a broadcast to 256 uv hubs. |
Cliff Wickman | 0e2595c | 2009-05-20 08:10:57 -0500 | [diff] [blame] | 1361 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1362 | for (i = 0, bd2 = bau_desc; i < (UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR); |
| 1363 | i++, bd2++) { |
| 1364 | memset(bd2, 0, sizeof(struct bau_desc)); |
| 1365 | bd2->header.sw_ack_flag = 1; |
Cliff Wickman | 94ca8e4 | 2009-04-14 10:56:48 -0500 | [diff] [blame] | 1366 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1367 | * base_dest_nodeid is the nasid (pnode<<1) of the first uvhub |
| 1368 | * in the partition. The bit map will indicate uvhub numbers, |
| 1369 | * which are 0-N in a partition. Pnodes are unique system-wide. |
Cliff Wickman | 94ca8e4 | 2009-04-14 10:56:48 -0500 | [diff] [blame] | 1370 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1371 | bd2->header.base_dest_nodeid = uv_partition_base_pnode << 1; |
| 1372 | bd2->header.dest_subnodeid = 0x10; /* the LB */ |
| 1373 | bd2->header.command = UV_NET_ENDPOINT_INTD; |
| 1374 | bd2->header.int_both = 1; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1375 | /* |
| 1376 | * all others need to be set to zero: |
| 1377 | * fairness chaining multilevel count replied_to |
| 1378 | */ |
| 1379 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1380 | for_each_present_cpu(cpu) { |
| 1381 | if (pnode != uv_blade_to_pnode(uv_cpu_to_blade_id(cpu))) |
| 1382 | continue; |
| 1383 | bcp = &per_cpu(bau_control, cpu); |
| 1384 | bcp->descriptor_base = bau_desc; |
| 1385 | } |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1386 | } |
| 1387 | |
| 1388 | /* |
| 1389 | * initialize the destination side's receiving buffers |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1390 | * entered for each uvhub in the partition |
| 1391 | * - node is first node (kernel memory notion) on the uvhub |
| 1392 | * - pnode is the uvhub's physical identifier |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1393 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1394 | static void |
| 1395 | uv_payload_queue_init(int node, int pnode) |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1396 | { |
Cliff Wickman | 4ea3c51 | 2009-04-16 07:53:09 -0500 | [diff] [blame] | 1397 | int pn; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1398 | int cpu; |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1399 | char *cp; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1400 | unsigned long pa; |
| 1401 | struct bau_payload_queue_entry *pqp; |
| 1402 | struct bau_payload_queue_entry *pqp_malloc; |
| 1403 | struct bau_control *bcp; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1404 | |
Jesper Juhl | 8e5e952 | 2010-11-09 00:08:11 +0100 | [diff] [blame] | 1405 | pqp = kmalloc_node((DEST_Q_SIZE + 1) |
| 1406 | * sizeof(struct bau_payload_queue_entry), |
| 1407 | GFP_KERNEL, node); |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 1408 | BUG_ON(!pqp); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1409 | pqp_malloc = pqp; |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1410 | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1411 | cp = (char *)pqp + 31; |
| 1412 | pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1413 | |
| 1414 | for_each_present_cpu(cpu) { |
| 1415 | if (pnode != uv_cpu_to_pnode(cpu)) |
| 1416 | continue; |
| 1417 | /* for every cpu on this pnode: */ |
| 1418 | bcp = &per_cpu(bau_control, cpu); |
| 1419 | bcp->va_queue_first = pqp; |
| 1420 | bcp->bau_msg_head = pqp; |
| 1421 | bcp->va_queue_last = pqp + (DEST_Q_SIZE - 1); |
| 1422 | } |
Cliff Wickman | 4ea3c51 | 2009-04-16 07:53:09 -0500 | [diff] [blame] | 1423 | /* |
| 1424 | * need the pnode of where the memory was really allocated |
| 1425 | */ |
| 1426 | pa = uv_gpa(pqp); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1427 | pn = pa >> uv_nshift; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1428 | uv_write_global_mmr64(pnode, |
| 1429 | UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST, |
Cliff Wickman | 4ea3c51 | 2009-04-16 07:53:09 -0500 | [diff] [blame] | 1430 | ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) | |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1431 | uv_physnodeaddr(pqp)); |
| 1432 | uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL, |
| 1433 | uv_physnodeaddr(pqp)); |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1434 | uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST, |
| 1435 | (unsigned long) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1436 | uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1))); |
| 1437 | /* in effect, all msg_type's are set to MSG_NOOP */ |
Ingo Molnar | dc163a4 | 2008-06-18 14:15:43 +0200 | [diff] [blame] | 1438 | memset(pqp, 0, sizeof(struct bau_payload_queue_entry) * DEST_Q_SIZE); |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1439 | } |
| 1440 | |
| 1441 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1442 | * Initialization of each UV hub's structures |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1443 | */ |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1444 | static void __init uv_init_uvhub(int uvhub, int vector) |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1445 | { |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 1446 | int node; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1447 | int pnode; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1448 | unsigned long apicid; |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1449 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1450 | node = uvhub_to_first_node(uvhub); |
| 1451 | pnode = uv_blade_to_pnode(uvhub); |
| 1452 | uv_activation_descriptor_init(node, pnode); |
| 1453 | uv_payload_queue_init(node, pnode); |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1454 | /* |
| 1455 | * the below initialization can't be in firmware because the |
| 1456 | * messaging IRQ will be determined by the OS |
| 1457 | */ |
Dimitri Sivanich | 8191c9f | 2010-11-16 16:23:52 -0600 | [diff] [blame] | 1458 | apicid = uvhub_to_first_apicid(uvhub) | uv_apicid_hibits; |
Cliff Wickman | e38e2af | 2009-11-19 17:12:43 -0600 | [diff] [blame] | 1459 | uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1460 | ((apicid << 32) | vector)); |
| 1461 | } |
| 1462 | |
| 1463 | /* |
Cliff Wickman | 12a6611 | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1464 | * We will set BAU_MISC_CONTROL with a timeout period. |
| 1465 | * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT. |
| 1466 | * So the destination timeout period has be be calculated from them. |
| 1467 | */ |
| 1468 | static int |
| 1469 | calculate_destination_timeout(void) |
| 1470 | { |
| 1471 | unsigned long mmr_image; |
| 1472 | int mult1; |
| 1473 | int mult2; |
| 1474 | int index; |
| 1475 | int base; |
| 1476 | int ret; |
| 1477 | unsigned long ts_ns; |
| 1478 | |
| 1479 | mult1 = UV_INTD_SOFT_ACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK; |
| 1480 | mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL); |
| 1481 | index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK; |
| 1482 | mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT); |
| 1483 | mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK; |
| 1484 | base = timeout_base_ns[index]; |
| 1485 | ts_ns = base * mult1 * mult2; |
| 1486 | ret = ts_ns / 1000; |
| 1487 | return ret; |
| 1488 | } |
| 1489 | |
| 1490 | /* |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1491 | * initialize the bau_control structure for each cpu |
| 1492 | */ |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1493 | static void __init uv_init_per_cpu(int nuvhubs) |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1494 | { |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1495 | int i; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1496 | int cpu; |
| 1497 | int pnode; |
| 1498 | int uvhub; |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1499 | int have_hmaster; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1500 | short socket = 0; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1501 | unsigned short socket_mask; |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1502 | unsigned char *uvhub_mask; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1503 | struct bau_control *bcp; |
| 1504 | struct uvhub_desc *bdp; |
| 1505 | struct socket_desc *sdp; |
| 1506 | struct bau_control *hmaster = NULL; |
| 1507 | struct bau_control *smaster = NULL; |
| 1508 | struct socket_desc { |
| 1509 | short num_cpus; |
| 1510 | short cpu_number[16]; |
| 1511 | }; |
| 1512 | struct uvhub_desc { |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1513 | unsigned short socket_mask; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1514 | short num_cpus; |
| 1515 | short uvhub; |
| 1516 | short pnode; |
| 1517 | struct socket_desc socket[2]; |
| 1518 | }; |
| 1519 | struct uvhub_desc *uvhub_descs; |
| 1520 | |
Cliff Wickman | 12a6611 | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1521 | timeout_us = calculate_destination_timeout(); |
| 1522 | |
Jesper Juhl | 8e5e952 | 2010-11-09 00:08:11 +0100 | [diff] [blame] | 1523 | uvhub_descs = kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1524 | memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc)); |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1525 | uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1526 | for_each_present_cpu(cpu) { |
| 1527 | bcp = &per_cpu(bau_control, cpu); |
| 1528 | memset(bcp, 0, sizeof(struct bau_control)); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1529 | pnode = uv_cpu_hub_info(cpu)->pnode; |
| 1530 | uvhub = uv_cpu_hub_info(cpu)->numa_blade_id; |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1531 | *(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8)); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1532 | bdp = &uvhub_descs[uvhub]; |
| 1533 | bdp->num_cpus++; |
| 1534 | bdp->uvhub = uvhub; |
| 1535 | bdp->pnode = pnode; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1536 | /* kludge: 'assuming' one node per socket, and assuming that |
| 1537 | disabling a socket just leaves a gap in node numbers */ |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1538 | socket = (cpu_to_node(cpu) & 1); |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1539 | bdp->socket_mask |= (1 << socket); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1540 | sdp = &bdp->socket[socket]; |
| 1541 | sdp->cpu_number[sdp->num_cpus] = cpu; |
| 1542 | sdp->num_cpus++; |
| 1543 | } |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1544 | for (uvhub = 0; uvhub < nuvhubs; uvhub++) { |
| 1545 | if (!(*(uvhub_mask + (uvhub/8)) & (1 << (uvhub%8)))) |
| 1546 | continue; |
| 1547 | have_hmaster = 0; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1548 | bdp = &uvhub_descs[uvhub]; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1549 | socket_mask = bdp->socket_mask; |
| 1550 | socket = 0; |
| 1551 | while (socket_mask) { |
| 1552 | if (!(socket_mask & 1)) |
| 1553 | goto nextsocket; |
| 1554 | sdp = &bdp->socket[socket]; |
| 1555 | for (i = 0; i < sdp->num_cpus; i++) { |
| 1556 | cpu = sdp->cpu_number[i]; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1557 | bcp = &per_cpu(bau_control, cpu); |
| 1558 | bcp->cpu = cpu; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1559 | if (i == 0) { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1560 | smaster = bcp; |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1561 | if (!have_hmaster) { |
| 1562 | have_hmaster++; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1563 | hmaster = bcp; |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1564 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1565 | } |
| 1566 | bcp->cpus_in_uvhub = bdp->num_cpus; |
| 1567 | bcp->cpus_in_socket = sdp->num_cpus; |
| 1568 | bcp->socket_master = smaster; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1569 | bcp->uvhub = bdp->uvhub; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1570 | bcp->uvhub_master = hmaster; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1571 | bcp->uvhub_cpu = uv_cpu_hub_info(cpu)-> |
| 1572 | blade_processor_id; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1573 | } |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1574 | nextsocket: |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1575 | socket++; |
Cliff Wickman | a8328ee | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1576 | socket_mask = (socket_mask >> 1); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1577 | } |
| 1578 | } |
| 1579 | kfree(uvhub_descs); |
Cliff Wickman | c4026cf | 2010-07-30 14:10:55 -0500 | [diff] [blame] | 1580 | kfree(uvhub_mask); |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1581 | for_each_present_cpu(cpu) { |
| 1582 | bcp = &per_cpu(bau_control, cpu); |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1583 | bcp->baudisabled = 0; |
Cliff Wickman | 712157a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1584 | bcp->statp = &per_cpu(ptcstats, cpu); |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1585 | /* time interval to catch a hardware stay-busy bug */ |
| 1586 | bcp->timeout_interval = microsec_2_cycles(2*timeout_us); |
| 1587 | bcp->max_bau_concurrent = max_bau_concurrent; |
| 1588 | bcp->max_bau_concurrent_constant = max_bau_concurrent; |
| 1589 | bcp->plugged_delay = plugged_delay; |
| 1590 | bcp->plugsb4reset = plugsb4reset; |
| 1591 | bcp->timeoutsb4reset = timeoutsb4reset; |
| 1592 | bcp->ipi_reset_limit = ipi_reset_limit; |
| 1593 | bcp->complete_threshold = complete_threshold; |
| 1594 | bcp->congested_response_us = congested_response_us; |
| 1595 | bcp->congested_reps = congested_reps; |
| 1596 | bcp->congested_period = congested_period; |
| 1597 | } |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1598 | } |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1599 | |
| 1600 | /* |
| 1601 | * Initialization of BAU-related structures |
| 1602 | */ |
Cliff Wickman | b194b12 | 2008-06-12 08:23:48 -0500 | [diff] [blame] | 1603 | static int __init uv_bau_init(void) |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1604 | { |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1605 | int uvhub; |
| 1606 | int pnode; |
| 1607 | int nuvhubs; |
Rusty Russell | 2c74d66 | 2009-03-18 08:22:30 +1030 | [diff] [blame] | 1608 | int cur_cpu; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1609 | int vector; |
| 1610 | unsigned long mmr; |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1611 | |
| 1612 | if (!is_uv_system()) |
| 1613 | return 0; |
| 1614 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1615 | if (nobau) |
| 1616 | return 0; |
| 1617 | |
Rusty Russell | 76ba0ec | 2009-03-13 14:49:57 +1030 | [diff] [blame] | 1618 | for_each_possible_cpu(cur_cpu) |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 1619 | zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu), |
Rusty Russell | 76ba0ec | 2009-03-13 14:49:57 +1030 | [diff] [blame] | 1620 | GFP_KERNEL, cpu_to_node(cur_cpu)); |
| 1621 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1622 | uv_nshift = uv_hub_info->m_val; |
Robin Holt | 036ed8b | 2009-10-15 17:40:00 -0500 | [diff] [blame] | 1623 | uv_mmask = (1UL << uv_hub_info->m_val) - 1; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1624 | nuvhubs = uv_num_possible_blades(); |
Cliff Wickman | 50fb55a | 2010-06-02 16:22:02 -0500 | [diff] [blame] | 1625 | spin_lock_init(&disable_lock); |
| 1626 | congested_cycles = microsec_2_cycles(congested_response_us); |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 1627 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1628 | uv_init_per_cpu(nuvhubs); |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1629 | |
Cliff Wickman | 94ca8e4 | 2009-04-14 10:56:48 -0500 | [diff] [blame] | 1630 | uv_partition_base_pnode = 0x7fffffff; |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1631 | for (uvhub = 0; uvhub < nuvhubs; uvhub++) |
| 1632 | if (uv_blade_nr_possible_cpus(uvhub) && |
| 1633 | (uv_blade_to_pnode(uvhub) < uv_partition_base_pnode)) |
| 1634 | uv_partition_base_pnode = uv_blade_to_pnode(uvhub); |
Cliff Wickman | 9674f35 | 2009-04-03 08:34:05 -0500 | [diff] [blame] | 1635 | |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1636 | vector = UV_BAU_MESSAGE; |
| 1637 | for_each_possible_blade(uvhub) |
| 1638 | if (uv_blade_nr_possible_cpus(uvhub)) |
| 1639 | uv_init_uvhub(uvhub, vector); |
| 1640 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1641 | uv_enable_timeouts(); |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1642 | alloc_intr_gate(vector, uv_bau_message_intr1); |
| 1643 | |
| 1644 | for_each_possible_blade(uvhub) { |
Cliff Wickman | 93a7ca0 | 2010-07-16 10:11:21 -0500 | [diff] [blame] | 1645 | if (uv_blade_nr_possible_cpus(uvhub)) { |
| 1646 | pnode = uv_blade_to_pnode(uvhub); |
| 1647 | /* INIT the bau */ |
| 1648 | uv_write_global_mmr64(pnode, |
| 1649 | UVH_LB_BAU_SB_ACTIVATION_CONTROL, |
| 1650 | ((unsigned long)1 << 63)); |
| 1651 | mmr = 1; /* should be 1 to broadcast to both sockets */ |
| 1652 | uv_write_global_mmr64(pnode, UVH_BAU_DATA_BROADCAST, |
| 1653 | mmr); |
| 1654 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1655 | } |
Ingo Molnar | b4c286e | 2008-06-18 14:28:19 +0200 | [diff] [blame] | 1656 | |
Cliff Wickman | 1812924 | 2008-06-02 08:56:14 -0500 | [diff] [blame] | 1657 | return 0; |
| 1658 | } |
Cliff Wickman | b8f7fb1 | 2010-04-14 11:35:46 -0500 | [diff] [blame] | 1659 | core_initcall(uv_bau_init); |
Cliff Wickman | e8e5e8a | 2010-06-02 16:22:01 -0500 | [diff] [blame] | 1660 | fs_initcall(uv_ptc_init); |