Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1 | /* sched.c - SPU scheduler. |
| 2 | * |
| 3 | * Copyright (C) IBM 2005 |
| 4 | * Author: Mark Nutter <mnutter@us.ibm.com> |
| 5 | * |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 6 | * 2006-03-31 NUMA domains added. |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2, or (at your option) |
| 11 | * any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
Arnd Bergmann | 3b3d22c | 2005-12-05 22:52:24 -0500 | [diff] [blame] | 23 | #undef DEBUG |
| 24 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 25 | #include <linux/errno.h> |
| 26 | #include <linux/sched.h> |
Ingo Molnar | 993db4b | 2013-02-11 10:45:33 +0100 | [diff] [blame] | 27 | #include <linux/sched/rt.h> |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 28 | #include <linux/kernel.h> |
| 29 | #include <linux/mm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 31 | #include <linux/completion.h> |
| 32 | #include <linux/vmalloc.h> |
| 33 | #include <linux/smp.h> |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 34 | #include <linux/stddef.h> |
| 35 | #include <linux/unistd.h> |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 36 | #include <linux/numa.h> |
| 37 | #include <linux/mutex.h> |
Arnd Bergmann | 8676727 | 2006-10-04 17:26:21 +0200 | [diff] [blame] | 38 | #include <linux/notifier.h> |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 39 | #include <linux/kthread.h> |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 40 | #include <linux/pid_namespace.h> |
| 41 | #include <linux/proc_fs.h> |
| 42 | #include <linux/seq_file.h> |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 43 | |
| 44 | #include <asm/io.h> |
| 45 | #include <asm/mmu_context.h> |
| 46 | #include <asm/spu.h> |
| 47 | #include <asm/spu_csa.h> |
Geoff Levand | a91942a | 2006-06-19 20:33:30 +0200 | [diff] [blame] | 48 | #include <asm/spu_priv1.h> |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 49 | #include "spufs.h" |
Christoph Hellwig | ae142e0 | 2009-06-12 04:31:52 +0000 | [diff] [blame] | 50 | #define CREATE_TRACE_POINTS |
| 51 | #include "sputrace.h" |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 52 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 53 | struct spu_prio_array { |
Christoph Hellwig | 72cb360 | 2007-02-13 21:54:28 +0100 | [diff] [blame] | 54 | DECLARE_BITMAP(bitmap, MAX_PRIO); |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 55 | struct list_head runq[MAX_PRIO]; |
| 56 | spinlock_t runq_lock; |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 57 | int nr_waiting; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 58 | }; |
| 59 | |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 60 | static unsigned long spu_avenrun[3]; |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 61 | static struct spu_prio_array *spu_prio; |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 62 | static struct task_struct *spusched_task; |
| 63 | static struct timer_list spusched_timer; |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 64 | static struct timer_list spuloadavg_timer; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 65 | |
Christoph Hellwig | fe443ef | 2007-06-29 10:57:52 +1000 | [diff] [blame] | 66 | /* |
| 67 | * Priority of a normal, non-rt, non-niced'd process (aka nice level 0). |
| 68 | */ |
| 69 | #define NORMAL_PRIO 120 |
| 70 | |
| 71 | /* |
| 72 | * Frequency of the spu scheduler tick. By default we do one SPU scheduler |
| 73 | * tick for every 10 CPU scheduler ticks. |
| 74 | */ |
| 75 | #define SPUSCHED_TICK (10) |
| 76 | |
| 77 | /* |
| 78 | * These are the 'tuning knobs' of the scheduler: |
| 79 | * |
Jeremy Kerr | 60e2423 | 2007-06-29 10:57:53 +1000 | [diff] [blame] | 80 | * Minimum timeslice is 5 msecs (or 1 spu scheduler tick, whichever is |
| 81 | * larger), default timeslice is 100 msecs, maximum timeslice is 800 msecs. |
Christoph Hellwig | fe443ef | 2007-06-29 10:57:52 +1000 | [diff] [blame] | 82 | */ |
Jeremy Kerr | 60e2423 | 2007-06-29 10:57:53 +1000 | [diff] [blame] | 83 | #define MIN_SPU_TIMESLICE max(5 * HZ / (1000 * SPUSCHED_TICK), 1) |
| 84 | #define DEF_SPU_TIMESLICE (100 * HZ / (1000 * SPUSCHED_TICK)) |
Christoph Hellwig | fe443ef | 2007-06-29 10:57:52 +1000 | [diff] [blame] | 85 | |
Christoph Hellwig | fe443ef | 2007-06-29 10:57:52 +1000 | [diff] [blame] | 86 | #define SCALE_PRIO(x, prio) \ |
| 87 | max(x * (MAX_PRIO - prio) / (MAX_USER_PRIO / 2), MIN_SPU_TIMESLICE) |
| 88 | |
| 89 | /* |
| 90 | * scale user-nice values [ -20 ... 0 ... 19 ] to time slice values: |
| 91 | * [800ms ... 100ms ... 5ms] |
| 92 | * |
| 93 | * The higher a thread's priority, the bigger timeslices |
| 94 | * it gets during one round of execution. But even the lowest |
| 95 | * priority thread gets MIN_TIMESLICE worth of execution time. |
| 96 | */ |
| 97 | void spu_set_timeslice(struct spu_context *ctx) |
| 98 | { |
| 99 | if (ctx->prio < NORMAL_PRIO) |
| 100 | ctx->time_slice = SCALE_PRIO(DEF_SPU_TIMESLICE * 4, ctx->prio); |
| 101 | else |
| 102 | ctx->time_slice = SCALE_PRIO(DEF_SPU_TIMESLICE, ctx->prio); |
| 103 | } |
| 104 | |
Christoph Hellwig | 2cf2b3b | 2007-06-29 10:57:55 +1000 | [diff] [blame] | 105 | /* |
| 106 | * Update scheduling information from the owning thread. |
| 107 | */ |
| 108 | void __spu_update_sched_info(struct spu_context *ctx) |
| 109 | { |
| 110 | /* |
Luke Browning | 9156953 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 111 | * assert that the context is not on the runqueue, so it is safe |
| 112 | * to change its scheduling parameters. |
| 113 | */ |
| 114 | BUG_ON(!list_empty(&ctx->rq)); |
| 115 | |
| 116 | /* |
Julio M. Merino Vidal | 9b1d21f | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 117 | * 32-Bit assignments are atomic on powerpc, and we don't care about |
| 118 | * memory ordering here because retrieving the controlling thread is |
| 119 | * per definition racy. |
Christoph Hellwig | 476273a | 2007-06-29 10:58:01 +1000 | [diff] [blame] | 120 | */ |
| 121 | ctx->tid = current->pid; |
| 122 | |
| 123 | /* |
Christoph Hellwig | 2cf2b3b | 2007-06-29 10:57:55 +1000 | [diff] [blame] | 124 | * We do our own priority calculations, so we normally want |
Julio M. Merino Vidal | 9b1d21f | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 125 | * ->static_prio to start with. Unfortunately this field |
Christoph Hellwig | 2cf2b3b | 2007-06-29 10:57:55 +1000 | [diff] [blame] | 126 | * contains junk for threads with a realtime scheduling |
| 127 | * policy so we have to look at ->prio in this case. |
| 128 | */ |
| 129 | if (rt_prio(current->prio)) |
| 130 | ctx->prio = current->prio; |
| 131 | else |
| 132 | ctx->prio = current->static_prio; |
| 133 | ctx->policy = current->policy; |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 134 | |
| 135 | /* |
Luke Browning | 9156953 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 136 | * TO DO: the context may be loaded, so we may need to activate |
| 137 | * it again on a different node. But it shouldn't hurt anything |
| 138 | * to update its parameters, because we know that the scheduler |
| 139 | * is not actively looking at this field, since it is not on the |
| 140 | * runqueue. The context will be rescheduled on the proper node |
| 141 | * if it is timesliced or preempted. |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 142 | */ |
KOSAKI Motohiro | 104699c | 2011-04-28 05:07:23 +0000 | [diff] [blame] | 143 | cpumask_copy(&ctx->cpus_allowed, tsk_cpus_allowed(current)); |
Luke Browning | 7a21420 | 2008-04-28 14:32:34 +1000 | [diff] [blame] | 144 | |
| 145 | /* Save the current cpu id for spu interrupt routing. */ |
| 146 | ctx->last_ran = raw_smp_processor_id(); |
Christoph Hellwig | 2cf2b3b | 2007-06-29 10:57:55 +1000 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | void spu_update_sched_info(struct spu_context *ctx) |
| 150 | { |
Luke Browning | 9156953 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 151 | int node; |
Christoph Hellwig | 2cf2b3b | 2007-06-29 10:57:55 +1000 | [diff] [blame] | 152 | |
Luke Browning | 9156953 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 153 | if (ctx->state == SPU_STATE_RUNNABLE) { |
| 154 | node = ctx->spu->node; |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 155 | |
| 156 | /* |
| 157 | * Take list_mutex to sync with find_victim(). |
| 158 | */ |
Luke Browning | 9156953 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 159 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 160 | __spu_update_sched_info(ctx); |
| 161 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
| 162 | } else { |
| 163 | __spu_update_sched_info(ctx); |
| 164 | } |
Christoph Hellwig | 2cf2b3b | 2007-06-29 10:57:55 +1000 | [diff] [blame] | 165 | } |
| 166 | |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 167 | static int __node_allowed(struct spu_context *ctx, int node) |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 168 | { |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 169 | if (nr_cpus_node(node)) { |
Rusty Russell | 86c6f27 | 2008-12-26 22:23:39 +1030 | [diff] [blame] | 170 | const struct cpumask *mask = cpumask_of_node(node); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 171 | |
Rusty Russell | 86c6f27 | 2008-12-26 22:23:39 +1030 | [diff] [blame] | 172 | if (cpumask_intersects(mask, &ctx->cpus_allowed)) |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 173 | return 1; |
| 174 | } |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int node_allowed(struct spu_context *ctx, int node) |
| 180 | { |
| 181 | int rval; |
| 182 | |
| 183 | spin_lock(&spu_prio->runq_lock); |
| 184 | rval = __node_allowed(ctx, node); |
| 185 | spin_unlock(&spu_prio->runq_lock); |
| 186 | |
| 187 | return rval; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 188 | } |
| 189 | |
Bob Nelson | aed3a8c | 2007-12-15 01:27:30 +1100 | [diff] [blame] | 190 | void do_notify_spus_active(void) |
Bob Nelson | 36aaccc | 2007-07-20 21:39:52 +0200 | [diff] [blame] | 191 | { |
| 192 | int node; |
| 193 | |
| 194 | /* |
| 195 | * Wake up the active spu_contexts. |
| 196 | * |
| 197 | * When the awakened processes see their "notify_active" flag is set, |
Julio M. Merino Vidal | 9b1d21f | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 198 | * they will call spu_switch_notify(). |
Bob Nelson | 36aaccc | 2007-07-20 21:39:52 +0200 | [diff] [blame] | 199 | */ |
| 200 | for_each_online_node(node) { |
| 201 | struct spu *spu; |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 202 | |
| 203 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 204 | list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) { |
| 205 | if (spu->alloc_state != SPU_FREE) { |
| 206 | struct spu_context *ctx = spu->ctx; |
| 207 | set_bit(SPU_SCHED_NOTIFY_ACTIVE, |
| 208 | &ctx->sched_flags); |
| 209 | mb(); |
| 210 | wake_up_all(&ctx->stop_wq); |
| 211 | } |
Bob Nelson | 36aaccc | 2007-07-20 21:39:52 +0200 | [diff] [blame] | 212 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 213 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Bob Nelson | 36aaccc | 2007-07-20 21:39:52 +0200 | [diff] [blame] | 214 | } |
| 215 | } |
| 216 | |
Christoph Hellwig | 202557d | 2007-02-13 21:36:49 +0100 | [diff] [blame] | 217 | /** |
| 218 | * spu_bind_context - bind spu context to physical spu |
| 219 | * @spu: physical spu to bind to |
| 220 | * @ctx: context to bind |
| 221 | */ |
| 222 | static void spu_bind_context(struct spu *spu, struct spu_context *ctx) |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 223 | { |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 224 | spu_context_trace(spu_bind_context__enter, ctx, spu); |
| 225 | |
Andre Detsch | 27ec41d | 2007-07-20 21:39:33 +0200 | [diff] [blame] | 226 | spuctx_switch_state(ctx, SPU_UTIL_SYSTEM); |
Christoph Hellwig | e9f8a0b | 2007-06-29 10:58:03 +1000 | [diff] [blame] | 227 | |
Arnd Bergmann | aa6d5b2 | 2007-07-20 21:39:44 +0200 | [diff] [blame] | 228 | if (ctx->flags & SPU_CREATE_NOSCHED) |
| 229 | atomic_inc(&cbe_spu_info[spu->node].reserved_spus); |
| 230 | |
Christoph Hellwig | e9f8a0b | 2007-06-29 10:58:03 +1000 | [diff] [blame] | 231 | ctx->stats.slb_flt_base = spu->stats.slb_flt; |
| 232 | ctx->stats.class2_intr_base = spu->stats.class2_intr; |
| 233 | |
Luke Browning | 2c911a1 | 2008-06-13 14:17:35 +1000 | [diff] [blame] | 234 | spu_associate_mm(spu, ctx->owner); |
| 235 | |
| 236 | spin_lock_irq(&spu->register_lock); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 237 | spu->ctx = ctx; |
| 238 | spu->flags = 0; |
| 239 | ctx->spu = spu; |
| 240 | ctx->ops = &spu_hw_ops; |
| 241 | spu->pid = current->pid; |
Bob Nelson | 1474855 | 2007-07-20 21:39:53 +0200 | [diff] [blame] | 242 | spu->tgid = current->tgid; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 243 | spu->ibox_callback = spufs_ibox_callback; |
| 244 | spu->wbox_callback = spufs_wbox_callback; |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 245 | spu->stop_callback = spufs_stop_callback; |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 246 | spu->mfc_callback = spufs_mfc_callback; |
Luke Browning | 2c911a1 | 2008-06-13 14:17:35 +1000 | [diff] [blame] | 247 | spin_unlock_irq(&spu->register_lock); |
| 248 | |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 249 | spu_unmap_mappings(ctx); |
Luke Browning | 2c911a1 | 2008-06-13 14:17:35 +1000 | [diff] [blame] | 250 | |
Christoph Hellwig | 5158e9b | 2008-04-29 17:08:38 +1000 | [diff] [blame] | 251 | spu_switch_log_notify(spu, ctx, SWITCH_LOG_START, 0); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 252 | spu_restore(&ctx->csa, spu); |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 253 | spu->timestamp = jiffies; |
Arnd Bergmann | 8676727 | 2006-10-04 17:26:21 +0200 | [diff] [blame] | 254 | spu_switch_notify(spu, ctx); |
Christoph Hellwig | 81998ba | 2007-02-13 21:36:48 +0100 | [diff] [blame] | 255 | ctx->state = SPU_STATE_RUNNABLE; |
Andre Detsch | 27ec41d | 2007-07-20 21:39:33 +0200 | [diff] [blame] | 256 | |
Andre Detsch | 2a58aa3 | 2008-02-25 15:07:42 -0300 | [diff] [blame] | 257 | spuctx_switch_state(ctx, SPU_UTIL_USER); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 258 | } |
| 259 | |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 260 | /* |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 261 | * Must be used with the list_mutex held. |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 262 | */ |
| 263 | static inline int sched_spu(struct spu *spu) |
| 264 | { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 265 | BUG_ON(!mutex_is_locked(&cbe_spu_info[spu->node].list_mutex)); |
| 266 | |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 267 | return (!spu->ctx || !(spu->ctx->flags & SPU_CREATE_NOSCHED)); |
| 268 | } |
| 269 | |
| 270 | static void aff_merge_remaining_ctxs(struct spu_gang *gang) |
| 271 | { |
| 272 | struct spu_context *ctx; |
| 273 | |
| 274 | list_for_each_entry(ctx, &gang->aff_list_head, aff_list) { |
| 275 | if (list_empty(&ctx->aff_list)) |
| 276 | list_add(&ctx->aff_list, &gang->aff_list_head); |
| 277 | } |
| 278 | gang->aff_flags |= AFF_MERGED; |
| 279 | } |
| 280 | |
| 281 | static void aff_set_offsets(struct spu_gang *gang) |
| 282 | { |
| 283 | struct spu_context *ctx; |
| 284 | int offset; |
| 285 | |
| 286 | offset = -1; |
| 287 | list_for_each_entry_reverse(ctx, &gang->aff_ref_ctx->aff_list, |
| 288 | aff_list) { |
| 289 | if (&ctx->aff_list == &gang->aff_list_head) |
| 290 | break; |
| 291 | ctx->aff_offset = offset--; |
| 292 | } |
| 293 | |
| 294 | offset = 0; |
| 295 | list_for_each_entry(ctx, gang->aff_ref_ctx->aff_list.prev, aff_list) { |
| 296 | if (&ctx->aff_list == &gang->aff_list_head) |
| 297 | break; |
| 298 | ctx->aff_offset = offset++; |
| 299 | } |
| 300 | |
| 301 | gang->aff_flags |= AFF_OFFSETS_SET; |
| 302 | } |
| 303 | |
| 304 | static struct spu *aff_ref_location(struct spu_context *ctx, int mem_aff, |
| 305 | int group_size, int lowest_offset) |
| 306 | { |
| 307 | struct spu *spu; |
| 308 | int node, n; |
| 309 | |
| 310 | /* |
| 311 | * TODO: A better algorithm could be used to find a good spu to be |
| 312 | * used as reference location for the ctxs chain. |
| 313 | */ |
| 314 | node = cpu_to_node(raw_smp_processor_id()); |
| 315 | for (n = 0; n < MAX_NUMNODES; n++, node++) { |
Andre Detsch | 10baa26 | 2008-10-21 11:15:23 +1100 | [diff] [blame] | 316 | /* |
| 317 | * "available_spus" counts how many spus are not potentially |
| 318 | * going to be used by other affinity gangs whose reference |
| 319 | * context is already in place. Although this code seeks to |
| 320 | * avoid having affinity gangs with a summed amount of |
| 321 | * contexts bigger than the amount of spus in the node, |
| 322 | * this may happen sporadically. In this case, available_spus |
| 323 | * becomes negative, which is harmless. |
| 324 | */ |
Andre Detsch | ad1ede1 | 2008-07-24 11:01:54 +1000 | [diff] [blame] | 325 | int available_spus; |
| 326 | |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 327 | node = (node < MAX_NUMNODES) ? node : 0; |
| 328 | if (!node_allowed(ctx, node)) |
| 329 | continue; |
Andre Detsch | ad1ede1 | 2008-07-24 11:01:54 +1000 | [diff] [blame] | 330 | |
| 331 | available_spus = 0; |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 332 | mutex_lock(&cbe_spu_info[node].list_mutex); |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 333 | list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) { |
Andre Detsch | 10baa26 | 2008-10-21 11:15:23 +1100 | [diff] [blame] | 334 | if (spu->ctx && spu->ctx->gang && !spu->ctx->aff_offset |
| 335 | && spu->ctx->gang->aff_ref_spu) |
| 336 | available_spus -= spu->ctx->gang->contexts; |
| 337 | available_spus++; |
Andre Detsch | ad1ede1 | 2008-07-24 11:01:54 +1000 | [diff] [blame] | 338 | } |
| 339 | if (available_spus < ctx->gang->contexts) { |
| 340 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
| 341 | continue; |
| 342 | } |
| 343 | |
| 344 | list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) { |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 345 | if ((!mem_aff || spu->has_mem_affinity) && |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 346 | sched_spu(spu)) { |
| 347 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 348 | return spu; |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 349 | } |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 350 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 351 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 352 | } |
| 353 | return NULL; |
| 354 | } |
| 355 | |
| 356 | static void aff_set_ref_point_location(struct spu_gang *gang) |
| 357 | { |
| 358 | int mem_aff, gs, lowest_offset; |
| 359 | struct spu_context *ctx; |
| 360 | struct spu *tmp; |
| 361 | |
| 362 | mem_aff = gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM; |
| 363 | lowest_offset = 0; |
| 364 | gs = 0; |
| 365 | |
| 366 | list_for_each_entry(tmp, &gang->aff_list_head, aff_list) |
| 367 | gs++; |
| 368 | |
| 369 | list_for_each_entry_reverse(ctx, &gang->aff_ref_ctx->aff_list, |
| 370 | aff_list) { |
| 371 | if (&ctx->aff_list == &gang->aff_list_head) |
| 372 | break; |
| 373 | lowest_offset = ctx->aff_offset; |
| 374 | } |
| 375 | |
Andre Detsch | 683e3ab | 2007-07-31 09:48:11 +1000 | [diff] [blame] | 376 | gang->aff_ref_spu = aff_ref_location(gang->aff_ref_ctx, mem_aff, gs, |
| 377 | lowest_offset); |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 378 | } |
| 379 | |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 380 | static struct spu *ctx_location(struct spu *ref, int offset, int node) |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 381 | { |
| 382 | struct spu *spu; |
| 383 | |
| 384 | spu = NULL; |
| 385 | if (offset >= 0) { |
| 386 | list_for_each_entry(spu, ref->aff_list.prev, aff_list) { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 387 | BUG_ON(spu->node != node); |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 388 | if (offset == 0) |
| 389 | break; |
| 390 | if (sched_spu(spu)) |
| 391 | offset--; |
| 392 | } |
| 393 | } else { |
| 394 | list_for_each_entry_reverse(spu, ref->aff_list.next, aff_list) { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 395 | BUG_ON(spu->node != node); |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 396 | if (offset == 0) |
| 397 | break; |
| 398 | if (sched_spu(spu)) |
| 399 | offset++; |
| 400 | } |
| 401 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 402 | |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 403 | return spu; |
| 404 | } |
| 405 | |
| 406 | /* |
| 407 | * affinity_check is called each time a context is going to be scheduled. |
| 408 | * It returns the spu ptr on which the context must run. |
| 409 | */ |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 410 | static int has_affinity(struct spu_context *ctx) |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 411 | { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 412 | struct spu_gang *gang = ctx->gang; |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 413 | |
| 414 | if (list_empty(&ctx->aff_list)) |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 415 | return 0; |
| 416 | |
Andre Detsch | 0855b54 | 2008-07-24 10:57:26 +1000 | [diff] [blame] | 417 | if (atomic_read(&ctx->gang->aff_sched_count) == 0) |
| 418 | ctx->gang->aff_ref_spu = NULL; |
| 419 | |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 420 | if (!gang->aff_ref_spu) { |
| 421 | if (!(gang->aff_flags & AFF_MERGED)) |
| 422 | aff_merge_remaining_ctxs(gang); |
| 423 | if (!(gang->aff_flags & AFF_OFFSETS_SET)) |
| 424 | aff_set_offsets(gang); |
| 425 | aff_set_ref_point_location(gang); |
| 426 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 427 | |
| 428 | return gang->aff_ref_spu != NULL; |
Arnd Bergmann | c5fc8d2 | 2007-07-20 21:39:48 +0200 | [diff] [blame] | 429 | } |
| 430 | |
Christoph Hellwig | 202557d | 2007-02-13 21:36:49 +0100 | [diff] [blame] | 431 | /** |
| 432 | * spu_unbind_context - unbind spu context from physical spu |
| 433 | * @spu: physical spu to unbind from |
| 434 | * @ctx: context to unbind |
Christoph Hellwig | 202557d | 2007-02-13 21:36:49 +0100 | [diff] [blame] | 435 | */ |
Christoph Hellwig | 678b2ff | 2007-02-13 21:54:25 +0100 | [diff] [blame] | 436 | static void spu_unbind_context(struct spu *spu, struct spu_context *ctx) |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 437 | { |
Luke Browning | 028fda0 | 2008-06-16 10:42:38 +1000 | [diff] [blame] | 438 | u32 status; |
| 439 | |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 440 | spu_context_trace(spu_unbind_context__enter, ctx, spu); |
| 441 | |
Andre Detsch | 27ec41d | 2007-07-20 21:39:33 +0200 | [diff] [blame] | 442 | spuctx_switch_state(ctx, SPU_UTIL_SYSTEM); |
Christoph Hellwig | fe2f896 | 2007-06-29 10:58:07 +1000 | [diff] [blame] | 443 | |
Arnd Bergmann | aa6d5b2 | 2007-07-20 21:39:44 +0200 | [diff] [blame] | 444 | if (spu->ctx->flags & SPU_CREATE_NOSCHED) |
| 445 | atomic_dec(&cbe_spu_info[spu->node].reserved_spus); |
Andre Detsch | 36ddbb1 | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 446 | |
Andre Detsch | 0855b54 | 2008-07-24 10:57:26 +1000 | [diff] [blame] | 447 | if (ctx->gang) |
Andre Detsch | 34318c2 | 2008-10-21 11:16:09 +1100 | [diff] [blame] | 448 | /* |
| 449 | * If ctx->gang->aff_sched_count is positive, SPU affinity is |
| 450 | * being considered in this gang. Using atomic_dec_if_positive |
| 451 | * allow us to skip an explicit check for affinity in this gang |
| 452 | */ |
Andre Detsch | 0855b54 | 2008-07-24 10:57:26 +1000 | [diff] [blame] | 453 | atomic_dec_if_positive(&ctx->gang->aff_sched_count); |
Andre Detsch | 36ddbb1 | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 454 | |
Arnd Bergmann | 8676727 | 2006-10-04 17:26:21 +0200 | [diff] [blame] | 455 | spu_switch_notify(spu, NULL); |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 456 | spu_unmap_mappings(ctx); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 457 | spu_save(&ctx->csa, spu); |
Christoph Hellwig | 5158e9b | 2008-04-29 17:08:38 +1000 | [diff] [blame] | 458 | spu_switch_log_notify(spu, ctx, SWITCH_LOG_STOP, 0); |
Luke Browning | 2c911a1 | 2008-06-13 14:17:35 +1000 | [diff] [blame] | 459 | |
| 460 | spin_lock_irq(&spu->register_lock); |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 461 | spu->timestamp = jiffies; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 462 | ctx->state = SPU_STATE_SAVED; |
| 463 | spu->ibox_callback = NULL; |
| 464 | spu->wbox_callback = NULL; |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 465 | spu->stop_callback = NULL; |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 466 | spu->mfc_callback = NULL; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 467 | spu->pid = 0; |
Bob Nelson | 1474855 | 2007-07-20 21:39:53 +0200 | [diff] [blame] | 468 | spu->tgid = 0; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 469 | ctx->ops = &spu_backing_ops; |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 470 | spu->flags = 0; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 471 | spu->ctx = NULL; |
Luke Browning | 2c911a1 | 2008-06-13 14:17:35 +1000 | [diff] [blame] | 472 | spin_unlock_irq(&spu->register_lock); |
| 473 | |
| 474 | spu_associate_mm(spu, NULL); |
Christoph Hellwig | e9f8a0b | 2007-06-29 10:58:03 +1000 | [diff] [blame] | 475 | |
| 476 | ctx->stats.slb_flt += |
| 477 | (spu->stats.slb_flt - ctx->stats.slb_flt_base); |
| 478 | ctx->stats.class2_intr += |
| 479 | (spu->stats.class2_intr - ctx->stats.class2_intr_base); |
Andre Detsch | 27ec41d | 2007-07-20 21:39:33 +0200 | [diff] [blame] | 480 | |
| 481 | /* This maps the underlying spu state to idle */ |
| 482 | spuctx_switch_state(ctx, SPU_UTIL_IDLE_LOADED); |
| 483 | ctx->spu = NULL; |
Luke Browning | 028fda0 | 2008-06-16 10:42:38 +1000 | [diff] [blame] | 484 | |
| 485 | if (spu_stopped(ctx, &status)) |
| 486 | wake_up_all(&ctx->stop_wq); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 487 | } |
| 488 | |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 489 | /** |
| 490 | * spu_add_to_rq - add a context to the runqueue |
| 491 | * @ctx: context to add |
| 492 | */ |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 493 | static void __spu_add_to_rq(struct spu_context *ctx) |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 494 | { |
Christoph Hellwig | 2744997 | 2007-06-29 10:58:06 +1000 | [diff] [blame] | 495 | /* |
| 496 | * Unfortunately this code path can be called from multiple threads |
| 497 | * on behalf of a single context due to the way the problem state |
| 498 | * mmap support works. |
| 499 | * |
| 500 | * Fortunately we need to wake up all these threads at the same time |
| 501 | * and can simply skip the runqueue addition for every but the first |
| 502 | * thread getting into this codepath. |
| 503 | * |
| 504 | * It's still quite hacky, and long-term we should proxy all other |
| 505 | * threads through the owner thread so that spu_run is in control |
| 506 | * of all the scheduling activity for a given context. |
| 507 | */ |
| 508 | if (list_empty(&ctx->rq)) { |
| 509 | list_add_tail(&ctx->rq, &spu_prio->runq[ctx->prio]); |
| 510 | set_bit(ctx->prio, spu_prio->bitmap); |
| 511 | if (!spu_prio->nr_waiting++) |
Ingo Molnar | 7401922 | 2009-02-18 12:23:29 +0100 | [diff] [blame] | 512 | mod_timer(&spusched_timer, jiffies + SPUSCHED_TICK); |
Christoph Hellwig | 2744997 | 2007-06-29 10:58:06 +1000 | [diff] [blame] | 513 | } |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 514 | } |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 515 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 516 | static void spu_add_to_rq(struct spu_context *ctx) |
| 517 | { |
| 518 | spin_lock(&spu_prio->runq_lock); |
| 519 | __spu_add_to_rq(ctx); |
| 520 | spin_unlock(&spu_prio->runq_lock); |
| 521 | } |
| 522 | |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 523 | static void __spu_del_from_rq(struct spu_context *ctx) |
Christoph Hellwig | a475c2f | 2007-04-23 21:08:11 +0200 | [diff] [blame] | 524 | { |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 525 | int prio = ctx->prio; |
| 526 | |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 527 | if (!list_empty(&ctx->rq)) { |
Christoph Hellwig | c77239b | 2007-06-29 10:58:05 +1000 | [diff] [blame] | 528 | if (!--spu_prio->nr_waiting) |
| 529 | del_timer(&spusched_timer); |
Christoph Hellwig | a475c2f | 2007-04-23 21:08:11 +0200 | [diff] [blame] | 530 | list_del_init(&ctx->rq); |
Christoph Hellwig | c77239b | 2007-06-29 10:58:05 +1000 | [diff] [blame] | 531 | |
| 532 | if (list_empty(&spu_prio->runq[prio])) |
| 533 | clear_bit(prio, spu_prio->bitmap); |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 534 | } |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 535 | } |
| 536 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 537 | void spu_del_from_rq(struct spu_context *ctx) |
| 538 | { |
| 539 | spin_lock(&spu_prio->runq_lock); |
| 540 | __spu_del_from_rq(ctx); |
| 541 | spin_unlock(&spu_prio->runq_lock); |
| 542 | } |
| 543 | |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 544 | static void spu_prio_wait(struct spu_context *ctx) |
| 545 | { |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 546 | DEFINE_WAIT(wait); |
| 547 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 548 | /* |
| 549 | * The caller must explicitly wait for a context to be loaded |
| 550 | * if the nosched flag is set. If NOSCHED is not set, the caller |
| 551 | * queues the context and waits for an spu event or error. |
| 552 | */ |
| 553 | BUG_ON(!(ctx->flags & SPU_CREATE_NOSCHED)); |
| 554 | |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 555 | spin_lock(&spu_prio->runq_lock); |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 556 | prepare_to_wait_exclusive(&ctx->stop_wq, &wait, TASK_INTERRUPTIBLE); |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 557 | if (!signal_pending(current)) { |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 558 | __spu_add_to_rq(ctx); |
| 559 | spin_unlock(&spu_prio->runq_lock); |
Christoph Hellwig | 650f8b0 | 2007-02-13 21:36:50 +0100 | [diff] [blame] | 560 | mutex_unlock(&ctx->state_mutex); |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 561 | schedule(); |
Christoph Hellwig | 650f8b0 | 2007-02-13 21:36:50 +0100 | [diff] [blame] | 562 | mutex_lock(&ctx->state_mutex); |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 563 | spin_lock(&spu_prio->runq_lock); |
| 564 | __spu_del_from_rq(ctx); |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 565 | } |
Luke Browning | 4e0f4ed | 2007-04-23 21:08:13 +0200 | [diff] [blame] | 566 | spin_unlock(&spu_prio->runq_lock); |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 567 | __set_current_state(TASK_RUNNING); |
| 568 | remove_wait_queue(&ctx->stop_wq, &wait); |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 569 | } |
| 570 | |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 571 | static struct spu *spu_get_idle(struct spu_context *ctx) |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 572 | { |
Andre Detsch | 36ddbb1 | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 573 | struct spu *spu, *aff_ref_spu; |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 574 | int node, n; |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 575 | |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 576 | spu_context_nospu_trace(spu_get_idle__enter, ctx); |
| 577 | |
Andre Detsch | 36ddbb1 | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 578 | if (ctx->gang) { |
| 579 | mutex_lock(&ctx->gang->aff_mutex); |
| 580 | if (has_affinity(ctx)) { |
| 581 | aff_ref_spu = ctx->gang->aff_ref_spu; |
| 582 | atomic_inc(&ctx->gang->aff_sched_count); |
| 583 | mutex_unlock(&ctx->gang->aff_mutex); |
| 584 | node = aff_ref_spu->node; |
Arnd Bergmann | cbc23d3 | 2007-07-20 21:39:49 +0200 | [diff] [blame] | 585 | |
Andre Detsch | 36ddbb1 | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 586 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 587 | spu = ctx_location(aff_ref_spu, ctx->aff_offset, node); |
| 588 | if (spu && spu->alloc_state == SPU_FREE) |
| 589 | goto found; |
| 590 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
| 591 | |
Andre Detsch | 0855b54 | 2008-07-24 10:57:26 +1000 | [diff] [blame] | 592 | atomic_dec(&ctx->gang->aff_sched_count); |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 593 | goto not_found; |
Andre Detsch | 36ddbb1 | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 594 | } |
| 595 | mutex_unlock(&ctx->gang->aff_mutex); |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 596 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 597 | node = cpu_to_node(raw_smp_processor_id()); |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 598 | for (n = 0; n < MAX_NUMNODES; n++, node++) { |
| 599 | node = (node < MAX_NUMNODES) ? node : 0; |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 600 | if (!node_allowed(ctx, node)) |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 601 | continue; |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 602 | |
| 603 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 604 | list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) { |
| 605 | if (spu->alloc_state == SPU_FREE) |
| 606 | goto found; |
| 607 | } |
| 608 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 609 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 610 | |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 611 | not_found: |
| 612 | spu_context_nospu_trace(spu_get_idle__not_found, ctx); |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 613 | return NULL; |
| 614 | |
| 615 | found: |
| 616 | spu->alloc_state = SPU_USED; |
| 617 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 618 | spu_context_trace(spu_get_idle__found, ctx, spu); |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 619 | spu_init_channels(spu); |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 620 | return spu; |
| 621 | } |
| 622 | |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 623 | /** |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 624 | * find_victim - find a lower priority context to preempt |
Michael Ellerman | 027dfac | 2016-06-01 16:34:37 +1000 | [diff] [blame] | 625 | * @ctx: candidate context for running |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 626 | * |
| 627 | * Returns the freed physical spu to run the new context on. |
| 628 | */ |
| 629 | static struct spu *find_victim(struct spu_context *ctx) |
| 630 | { |
| 631 | struct spu_context *victim = NULL; |
| 632 | struct spu *spu; |
| 633 | int node, n; |
| 634 | |
Julio M. Merino Vidal | 8a476d4 | 2008-04-30 15:16:14 +1000 | [diff] [blame] | 635 | spu_context_nospu_trace(spu_find_victim__enter, ctx); |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 636 | |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 637 | /* |
| 638 | * Look for a possible preemption candidate on the local node first. |
| 639 | * If there is no candidate look at the other nodes. This isn't |
Julio M. Merino Vidal | 9b1d21f | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 640 | * exactly fair, but so far the whole spu scheduler tries to keep |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 641 | * a strong node affinity. We might want to fine-tune this in |
| 642 | * the future. |
| 643 | */ |
| 644 | restart: |
| 645 | node = cpu_to_node(raw_smp_processor_id()); |
| 646 | for (n = 0; n < MAX_NUMNODES; n++, node++) { |
| 647 | node = (node < MAX_NUMNODES) ? node : 0; |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 648 | if (!node_allowed(ctx, node)) |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 649 | continue; |
| 650 | |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 651 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 652 | list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) { |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 653 | struct spu_context *tmp = spu->ctx; |
| 654 | |
Christoph Hellwig | c0e7b4a | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 655 | if (tmp && tmp->prio > ctx->prio && |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 656 | !(tmp->flags & SPU_CREATE_NOSCHED) && |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 657 | (!victim || tmp->prio > victim->prio)) { |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 658 | victim = spu->ctx; |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 659 | } |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 660 | } |
Jeremy Kerr | 9f43e39 | 2008-09-02 11:57:09 +1000 | [diff] [blame] | 661 | if (victim) |
| 662 | get_spu_context(victim); |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 663 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 664 | |
| 665 | if (victim) { |
| 666 | /* |
| 667 | * This nests ctx->state_mutex, but we always lock |
| 668 | * higher priority contexts before lower priority |
| 669 | * ones, so this is safe until we introduce |
| 670 | * priority inheritance schemes. |
Luke Browning | 9156953 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 671 | * |
| 672 | * XXX if the highest priority context is locked, |
| 673 | * this can loop a long time. Might be better to |
| 674 | * look at another context or give up after X retries. |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 675 | */ |
| 676 | if (!mutex_trylock(&victim->state_mutex)) { |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 677 | put_spu_context(victim); |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 678 | victim = NULL; |
| 679 | goto restart; |
| 680 | } |
| 681 | |
| 682 | spu = victim->spu; |
Luke Browning | b192541 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 683 | if (!spu || victim->prio <= ctx->prio) { |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 684 | /* |
| 685 | * This race can happen because we've dropped |
Luke Browning | b192541 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 686 | * the active list mutex. Not a problem, just |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 687 | * restart the search. |
| 688 | */ |
| 689 | mutex_unlock(&victim->state_mutex); |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 690 | put_spu_context(victim); |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 691 | victim = NULL; |
| 692 | goto restart; |
| 693 | } |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 694 | |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 695 | spu_context_trace(__spu_deactivate__unload, ctx, spu); |
| 696 | |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 697 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 698 | cbe_spu_info[node].nr_active--; |
Christoph Hellwig | c0e7b4a | 2007-09-19 14:38:12 +1000 | [diff] [blame] | 699 | spu_unbind_context(spu, victim); |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 700 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
| 701 | |
Christoph Hellwig | e9f8a0b | 2007-06-29 10:58:03 +1000 | [diff] [blame] | 702 | victim->stats.invol_ctx_switch++; |
Christoph Hellwig | fe2f896 | 2007-06-29 10:58:07 +1000 | [diff] [blame] | 703 | spu->stats.invol_ctx_switch++; |
Luke Browning | 08fcf1d | 2008-05-12 14:36:59 +0000 | [diff] [blame] | 704 | if (test_bit(SPU_SCHED_SPU_RUN, &victim->sched_flags)) |
Christoph Hellwig | 7a28a15 | 2008-05-08 15:26:32 +1000 | [diff] [blame] | 705 | spu_add_to_rq(victim); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 706 | |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 707 | mutex_unlock(&victim->state_mutex); |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 708 | put_spu_context(victim); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 709 | |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 710 | return spu; |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | return NULL; |
| 715 | } |
| 716 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 717 | static void __spu_schedule(struct spu *spu, struct spu_context *ctx) |
| 718 | { |
| 719 | int node = spu->node; |
| 720 | int success = 0; |
| 721 | |
| 722 | spu_set_timeslice(ctx); |
| 723 | |
| 724 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 725 | if (spu->ctx == NULL) { |
| 726 | spu_bind_context(spu, ctx); |
| 727 | cbe_spu_info[node].nr_active++; |
| 728 | spu->alloc_state = SPU_USED; |
| 729 | success = 1; |
| 730 | } |
| 731 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
| 732 | |
| 733 | if (success) |
| 734 | wake_up_all(&ctx->run_wq); |
| 735 | else |
| 736 | spu_add_to_rq(ctx); |
| 737 | } |
| 738 | |
| 739 | static void spu_schedule(struct spu *spu, struct spu_context *ctx) |
| 740 | { |
Christoph Hellwig | c9101bd | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 741 | /* not a candidate for interruptible because it's called either |
| 742 | from the scheduler thread or from spu_deactivate */ |
| 743 | mutex_lock(&ctx->state_mutex); |
Andre Detsch | b2e601d | 2008-09-04 21:16:27 +0000 | [diff] [blame] | 744 | if (ctx->state == SPU_STATE_SAVED) |
| 745 | __spu_schedule(spu, ctx); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 746 | spu_release(ctx); |
| 747 | } |
| 748 | |
Jeremy Kerr | b65fe03 | 2008-09-04 15:02:47 +1000 | [diff] [blame] | 749 | /** |
| 750 | * spu_unschedule - remove a context from a spu, and possibly release it. |
| 751 | * @spu: The SPU to unschedule from |
| 752 | * @ctx: The context currently scheduled on the SPU |
| 753 | * @free_spu Whether to free the SPU for other contexts |
| 754 | * |
| 755 | * Unbinds the context @ctx from the SPU @spu. If @free_spu is non-zero, the |
| 756 | * SPU is made available for other contexts (ie, may be returned by |
| 757 | * spu_get_idle). If this is zero, the caller is expected to schedule another |
| 758 | * context to this spu. |
| 759 | * |
| 760 | * Should be called with ctx->state_mutex held. |
| 761 | */ |
| 762 | static void spu_unschedule(struct spu *spu, struct spu_context *ctx, |
| 763 | int free_spu) |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 764 | { |
| 765 | int node = spu->node; |
| 766 | |
| 767 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 768 | cbe_spu_info[node].nr_active--; |
Jeremy Kerr | b65fe03 | 2008-09-04 15:02:47 +1000 | [diff] [blame] | 769 | if (free_spu) |
| 770 | spu->alloc_state = SPU_FREE; |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 771 | spu_unbind_context(spu, ctx); |
| 772 | ctx->stats.invol_ctx_switch++; |
| 773 | spu->stats.invol_ctx_switch++; |
| 774 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
| 775 | } |
| 776 | |
Christoph Hellwig | 52f04fc | 2007-02-13 21:54:27 +0100 | [diff] [blame] | 777 | /** |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 778 | * spu_activate - find a free spu for a context and execute it |
| 779 | * @ctx: spu context to schedule |
| 780 | * @flags: flags (currently ignored) |
| 781 | * |
Christoph Hellwig | 0887309 | 2007-04-23 21:08:06 +0200 | [diff] [blame] | 782 | * Tries to find a free spu to run @ctx. If no free spu is available |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 783 | * add the context to the runqueue so it gets woken up once an spu |
| 784 | * is available. |
| 785 | */ |
Christoph Hellwig | 26bec67 | 2007-02-13 21:54:24 +0100 | [diff] [blame] | 786 | int spu_activate(struct spu_context *ctx, unsigned long flags) |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 787 | { |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 788 | struct spu *spu; |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 789 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 790 | /* |
| 791 | * If there are multiple threads waiting for a single context |
| 792 | * only one actually binds the context while the others will |
| 793 | * only be able to acquire the state_mutex once the context |
| 794 | * already is in runnable state. |
| 795 | */ |
| 796 | if (ctx->spu) |
| 797 | return 0; |
Christoph Hellwig | 2744997 | 2007-06-29 10:58:06 +1000 | [diff] [blame] | 798 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 799 | spu_activate_top: |
| 800 | if (signal_pending(current)) |
| 801 | return -ERESTARTSYS; |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 802 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 803 | spu = spu_get_idle(ctx); |
| 804 | /* |
| 805 | * If this is a realtime thread we try to get it running by |
| 806 | * preempting a lower priority thread. |
| 807 | */ |
| 808 | if (!spu && rt_prio(ctx->prio)) |
| 809 | spu = find_victim(ctx); |
| 810 | if (spu) { |
| 811 | unsigned long runcntl; |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 812 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 813 | runcntl = ctx->ops->runcntl_read(ctx); |
| 814 | __spu_schedule(spu, ctx); |
| 815 | if (runcntl & SPU_RUNCNTL_RUNNABLE) |
| 816 | spuctx_switch_state(ctx, SPU_UTIL_USER); |
| 817 | |
| 818 | return 0; |
| 819 | } |
| 820 | |
| 821 | if (ctx->flags & SPU_CREATE_NOSCHED) { |
Christoph Hellwig | 50b520d | 2007-03-10 00:05:36 +0100 | [diff] [blame] | 822 | spu_prio_wait(ctx); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 823 | goto spu_activate_top; |
| 824 | } |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 825 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 826 | spu_add_to_rq(ctx); |
| 827 | |
| 828 | return 0; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 829 | } |
| 830 | |
Christoph Hellwig | 678b2ff | 2007-02-13 21:54:25 +0100 | [diff] [blame] | 831 | /** |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 832 | * grab_runnable_context - try to find a runnable context |
| 833 | * |
| 834 | * Remove the highest priority context on the runqueue and return it |
| 835 | * to the caller. Returns %NULL if no runnable context was found. |
| 836 | */ |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 837 | static struct spu_context *grab_runnable_context(int prio, int node) |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 838 | { |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 839 | struct spu_context *ctx; |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 840 | int best; |
| 841 | |
| 842 | spin_lock(&spu_prio->runq_lock); |
Masato Noguchi | 7e90b74 | 2007-07-20 21:39:43 +0200 | [diff] [blame] | 843 | best = find_first_bit(spu_prio->bitmap, prio); |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 844 | while (best < prio) { |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 845 | struct list_head *rq = &spu_prio->runq[best]; |
| 846 | |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 847 | list_for_each_entry(ctx, rq, rq) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 848 | /* XXX(hch): check for affinity here as well */ |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 849 | if (__node_allowed(ctx, node)) { |
| 850 | __spu_del_from_rq(ctx); |
| 851 | goto found; |
| 852 | } |
| 853 | } |
| 854 | best++; |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 855 | } |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 856 | ctx = NULL; |
| 857 | found: |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 858 | spin_unlock(&spu_prio->runq_lock); |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 859 | return ctx; |
| 860 | } |
| 861 | |
| 862 | static int __spu_deactivate(struct spu_context *ctx, int force, int max_prio) |
| 863 | { |
| 864 | struct spu *spu = ctx->spu; |
| 865 | struct spu_context *new = NULL; |
| 866 | |
| 867 | if (spu) { |
Christoph Hellwig | ea1ae59 | 2007-06-29 10:57:56 +1000 | [diff] [blame] | 868 | new = grab_runnable_context(max_prio, spu->node); |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 869 | if (new || force) { |
Jeremy Kerr | b65fe03 | 2008-09-04 15:02:47 +1000 | [diff] [blame] | 870 | spu_unschedule(spu, ctx, new == NULL); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 871 | if (new) { |
| 872 | if (new->flags & SPU_CREATE_NOSCHED) |
| 873 | wake_up(&new->stop_wq); |
| 874 | else { |
| 875 | spu_release(ctx); |
| 876 | spu_schedule(spu, new); |
Christoph Hellwig | c9101bd | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 877 | /* this one can't easily be made |
| 878 | interruptible */ |
| 879 | mutex_lock(&ctx->state_mutex); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 880 | } |
| 881 | } |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 882 | } |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | return new != NULL; |
| 886 | } |
| 887 | |
| 888 | /** |
Christoph Hellwig | 678b2ff | 2007-02-13 21:54:25 +0100 | [diff] [blame] | 889 | * spu_deactivate - unbind a context from it's physical spu |
| 890 | * @ctx: spu context to unbind |
| 891 | * |
| 892 | * Unbind @ctx from the physical spu it is running on and schedule |
| 893 | * the highest priority context to run on the freed physical spu. |
| 894 | */ |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 895 | void spu_deactivate(struct spu_context *ctx) |
| 896 | { |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 897 | spu_context_nospu_trace(spu_deactivate__enter, ctx); |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 898 | __spu_deactivate(ctx, 1, MAX_PRIO); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 899 | } |
| 900 | |
Christoph Hellwig | ae7b4c5 | 2007-02-13 21:54:26 +0100 | [diff] [blame] | 901 | /** |
Bob Nelson | 1474855 | 2007-07-20 21:39:53 +0200 | [diff] [blame] | 902 | * spu_yield - yield a physical spu if others are waiting |
Christoph Hellwig | ae7b4c5 | 2007-02-13 21:54:26 +0100 | [diff] [blame] | 903 | * @ctx: spu context to yield |
| 904 | * |
| 905 | * Check if there is a higher priority context waiting and if yes |
| 906 | * unbind @ctx from the physical spu and schedule the highest |
| 907 | * priority context to run on the freed physical spu instead. |
| 908 | */ |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 909 | void spu_yield(struct spu_context *ctx) |
| 910 | { |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 911 | spu_context_nospu_trace(spu_yield__enter, ctx); |
Christoph Hellwig | e5c0b9e | 2007-06-05 11:25:59 +1000 | [diff] [blame] | 912 | if (!(ctx->flags & SPU_CREATE_NOSCHED)) { |
| 913 | mutex_lock(&ctx->state_mutex); |
Andre Detsch | 27ec41d | 2007-07-20 21:39:33 +0200 | [diff] [blame] | 914 | __spu_deactivate(ctx, 0, MAX_PRIO); |
Christoph Hellwig | e5c0b9e | 2007-06-05 11:25:59 +1000 | [diff] [blame] | 915 | mutex_unlock(&ctx->state_mutex); |
| 916 | } |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 917 | } |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 918 | |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 919 | static noinline void spusched_tick(struct spu_context *ctx) |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 920 | { |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 921 | struct spu_context *new = NULL; |
| 922 | struct spu *spu = NULL; |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 923 | |
Christoph Hellwig | c9101bd | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 924 | if (spu_acquire(ctx)) |
| 925 | BUG(); /* a kernel thread never has signals pending */ |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 926 | |
| 927 | if (ctx->state != SPU_STATE_RUNNABLE) |
| 928 | goto out; |
Christoph Hellwig | df09cf3 | 2007-06-29 10:57:58 +1000 | [diff] [blame] | 929 | if (ctx->flags & SPU_CREATE_NOSCHED) |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 930 | goto out; |
Christoph Hellwig | df09cf3 | 2007-06-29 10:57:58 +1000 | [diff] [blame] | 931 | if (ctx->policy == SCHED_FIFO) |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 932 | goto out; |
Christoph Hellwig | df09cf3 | 2007-06-29 10:57:58 +1000 | [diff] [blame] | 933 | |
Jeremy Kerr | ce7c191 | 2008-03-04 20:17:02 +1100 | [diff] [blame] | 934 | if (--ctx->time_slice && test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags)) |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 935 | goto out; |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 936 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 937 | spu = ctx->spu; |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 938 | |
| 939 | spu_context_trace(spusched_tick__preempt, ctx, spu); |
| 940 | |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 941 | new = grab_runnable_context(ctx->prio + 1, spu->node); |
| 942 | if (new) { |
Jeremy Kerr | b65fe03 | 2008-09-04 15:02:47 +1000 | [diff] [blame] | 943 | spu_unschedule(spu, ctx, 0); |
Jeremy Kerr | ce7c191 | 2008-03-04 20:17:02 +1100 | [diff] [blame] | 944 | if (test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags)) |
Jeremy Kerr | 4ef1101 | 2008-02-19 10:05:35 +1100 | [diff] [blame] | 945 | spu_add_to_rq(ctx); |
Christoph Hellwig | bb5db29 | 2007-06-04 23:26:51 +1000 | [diff] [blame] | 946 | } else { |
Christoph Hellwig | 038200c | 2008-01-11 15:03:26 +1100 | [diff] [blame] | 947 | spu_context_nospu_trace(spusched_tick__newslice, ctx); |
Luke Browning | 2442a8b | 2008-06-06 11:26:54 +0800 | [diff] [blame] | 948 | if (!ctx->time_slice) |
| 949 | ctx->time_slice++; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 950 | } |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 951 | out: |
| 952 | spu_release(ctx); |
| 953 | |
| 954 | if (new) |
| 955 | spu_schedule(spu, new); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 956 | } |
| 957 | |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 958 | /** |
| 959 | * count_active_contexts - count nr of active tasks |
| 960 | * |
| 961 | * Return the number of tasks currently running or waiting to run. |
| 962 | * |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 963 | * Note that we don't take runq_lock / list_mutex here. Reading |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 964 | * a single 32bit value is atomic on powerpc, and we don't care |
| 965 | * about memory ordering issues here. |
| 966 | */ |
| 967 | static unsigned long count_active_contexts(void) |
| 968 | { |
| 969 | int nr_active = 0, node; |
| 970 | |
| 971 | for (node = 0; node < MAX_NUMNODES; node++) |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 972 | nr_active += cbe_spu_info[node].nr_active; |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 973 | nr_active += spu_prio->nr_waiting; |
| 974 | |
| 975 | return nr_active; |
| 976 | } |
| 977 | |
| 978 | /** |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 979 | * spu_calc_load - update the avenrun load estimates. |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 980 | * |
| 981 | * No locking against reading these values from userspace, as for |
| 982 | * the CPU loadavg code. |
| 983 | */ |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 984 | static void spu_calc_load(void) |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 985 | { |
| 986 | unsigned long active_tasks; /* fixed-point */ |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 987 | |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 988 | active_tasks = count_active_contexts() * FIXED_1; |
| 989 | CALC_LOAD(spu_avenrun[0], EXP_1, active_tasks); |
| 990 | CALC_LOAD(spu_avenrun[1], EXP_5, active_tasks); |
| 991 | CALC_LOAD(spu_avenrun[2], EXP_15, active_tasks); |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 992 | } |
| 993 | |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 994 | static void spusched_wake(unsigned long data) |
| 995 | { |
| 996 | mod_timer(&spusched_timer, jiffies + SPUSCHED_TICK); |
| 997 | wake_up_process(spusched_task); |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | static void spuloadavg_wake(unsigned long data) |
| 1001 | { |
| 1002 | mod_timer(&spuloadavg_timer, jiffies + LOAD_FREQ); |
| 1003 | spu_calc_load(); |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | static int spusched_thread(void *unused) |
| 1007 | { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 1008 | struct spu *spu; |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1009 | int node; |
| 1010 | |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1011 | while (!kthread_should_stop()) { |
| 1012 | set_current_state(TASK_INTERRUPTIBLE); |
| 1013 | schedule(); |
| 1014 | for (node = 0; node < MAX_NUMNODES; node++) { |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1015 | struct mutex *mtx = &cbe_spu_info[node].list_mutex; |
| 1016 | |
| 1017 | mutex_lock(mtx); |
| 1018 | list_for_each_entry(spu, &cbe_spu_info[node].spus, |
| 1019 | cbe_list) { |
| 1020 | struct spu_context *ctx = spu->ctx; |
| 1021 | |
| 1022 | if (ctx) { |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 1023 | get_spu_context(ctx); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1024 | mutex_unlock(mtx); |
| 1025 | spusched_tick(ctx); |
| 1026 | mutex_lock(mtx); |
Jeremy Kerr | 8d5636f | 2008-08-14 14:59:12 +1000 | [diff] [blame] | 1027 | put_spu_context(ctx); |
Luke Browning | e65c2f6 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1028 | } |
| 1029 | } |
| 1030 | mutex_unlock(mtx); |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1031 | } |
| 1032 | } |
| 1033 | |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1034 | return 0; |
| 1035 | } |
| 1036 | |
Jeremy Kerr | 7cd58e4 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1037 | void spuctx_switch_state(struct spu_context *ctx, |
| 1038 | enum spu_utilization_state new_state) |
| 1039 | { |
| 1040 | unsigned long long curtime; |
| 1041 | signed long long delta; |
Jeremy Kerr | 7cd58e4 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1042 | struct spu *spu; |
| 1043 | enum spu_utilization_state old_state; |
Maxim Shchetynin | fabb657 | 2008-07-05 05:05:39 +1000 | [diff] [blame] | 1044 | int node; |
Jeremy Kerr | 7cd58e4 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1045 | |
Thomas Gleixner | f2dec1e | 2014-07-16 21:04:38 +0000 | [diff] [blame] | 1046 | curtime = ktime_get_ns(); |
Jeremy Kerr | 7cd58e4 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1047 | delta = curtime - ctx->stats.tstamp; |
| 1048 | |
| 1049 | WARN_ON(!mutex_is_locked(&ctx->state_mutex)); |
| 1050 | WARN_ON(delta < 0); |
| 1051 | |
| 1052 | spu = ctx->spu; |
| 1053 | old_state = ctx->stats.util_state; |
| 1054 | ctx->stats.util_state = new_state; |
| 1055 | ctx->stats.tstamp = curtime; |
| 1056 | |
| 1057 | /* |
| 1058 | * Update the physical SPU utilization statistics. |
| 1059 | */ |
| 1060 | if (spu) { |
| 1061 | ctx->stats.times[old_state] += delta; |
| 1062 | spu->stats.times[old_state] += delta; |
| 1063 | spu->stats.util_state = new_state; |
| 1064 | spu->stats.tstamp = curtime; |
Maxim Shchetynin | fabb657 | 2008-07-05 05:05:39 +1000 | [diff] [blame] | 1065 | node = spu->node; |
| 1066 | if (old_state == SPU_UTIL_USER) |
| 1067 | atomic_dec(&cbe_spu_info[node].busy_spus); |
Ilpo Järvinen | cb9808d | 2008-08-19 08:48:57 +0300 | [diff] [blame] | 1068 | if (new_state == SPU_UTIL_USER) |
Maxim Shchetynin | fabb657 | 2008-07-05 05:05:39 +1000 | [diff] [blame] | 1069 | atomic_inc(&cbe_spu_info[node].busy_spus); |
Jeremy Kerr | 7cd58e4 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1070 | } |
| 1071 | } |
| 1072 | |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1073 | #define LOAD_INT(x) ((x) >> FSHIFT) |
| 1074 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) |
| 1075 | |
| 1076 | static int show_spu_loadavg(struct seq_file *s, void *private) |
| 1077 | { |
| 1078 | int a, b, c; |
| 1079 | |
| 1080 | a = spu_avenrun[0] + (FIXED_1/200); |
| 1081 | b = spu_avenrun[1] + (FIXED_1/200); |
| 1082 | c = spu_avenrun[2] + (FIXED_1/200); |
| 1083 | |
| 1084 | /* |
| 1085 | * Note that last_pid doesn't really make much sense for the |
Julio M. Merino Vidal | 9b1d21f | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1086 | * SPU loadavg (it even seems very odd on the CPU side...), |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1087 | * but we include it here to have a 100% compatible interface. |
| 1088 | */ |
| 1089 | seq_printf(s, "%d.%02d %d.%02d %d.%02d %ld/%d %d\n", |
| 1090 | LOAD_INT(a), LOAD_FRAC(a), |
| 1091 | LOAD_INT(b), LOAD_FRAC(b), |
| 1092 | LOAD_INT(c), LOAD_FRAC(c), |
| 1093 | count_active_contexts(), |
| 1094 | atomic_read(&nr_spu_contexts), |
Eric W. Biederman | 17cf22c | 2010-03-02 14:51:53 -0800 | [diff] [blame] | 1095 | task_active_pid_ns(current)->last_pid); |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1096 | return 0; |
| 1097 | } |
| 1098 | |
| 1099 | static int spu_loadavg_open(struct inode *inode, struct file *file) |
| 1100 | { |
| 1101 | return single_open(file, show_spu_loadavg, NULL); |
| 1102 | } |
| 1103 | |
| 1104 | static const struct file_operations spu_loadavg_fops = { |
| 1105 | .open = spu_loadavg_open, |
| 1106 | .read = seq_read, |
| 1107 | .llseek = seq_lseek, |
| 1108 | .release = single_release, |
| 1109 | }; |
| 1110 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1111 | int __init spu_sched_init(void) |
| 1112 | { |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1113 | struct proc_dir_entry *entry; |
| 1114 | int err = -ENOMEM, i; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1115 | |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 1116 | spu_prio = kzalloc(sizeof(struct spu_prio_array), GFP_KERNEL); |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1117 | if (!spu_prio) |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1118 | goto out; |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1119 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1120 | for (i = 0; i < MAX_PRIO; i++) { |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 1121 | INIT_LIST_HEAD(&spu_prio->runq[i]); |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 1122 | __clear_bit(i, spu_prio->bitmap); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1123 | } |
Christoph Hellwig | 079cdb6 | 2007-02-13 21:54:23 +0100 | [diff] [blame] | 1124 | spin_lock_init(&spu_prio->runq_lock); |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1125 | |
Christoph Hellwig | c77239b | 2007-06-29 10:58:05 +1000 | [diff] [blame] | 1126 | setup_timer(&spusched_timer, spusched_wake, 0); |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1127 | setup_timer(&spuloadavg_timer, spuloadavg_wake, 0); |
Christoph Hellwig | c77239b | 2007-06-29 10:58:05 +1000 | [diff] [blame] | 1128 | |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1129 | spusched_task = kthread_run(spusched_thread, NULL, "spusched"); |
| 1130 | if (IS_ERR(spusched_task)) { |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1131 | err = PTR_ERR(spusched_task); |
| 1132 | goto out_free_spu_prio; |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1133 | } |
Jeremy Kerr | f3f59be | 2007-06-29 10:57:54 +1000 | [diff] [blame] | 1134 | |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1135 | mod_timer(&spuloadavg_timer, 0); |
| 1136 | |
Denis V. Lunev | 6674713 | 2008-04-29 01:02:26 -0700 | [diff] [blame] | 1137 | entry = proc_create("spu_loadavg", 0, NULL, &spu_loadavg_fops); |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1138 | if (!entry) |
| 1139 | goto out_stop_kthread; |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1140 | |
Jeremy Kerr | f3f59be | 2007-06-29 10:57:54 +1000 | [diff] [blame] | 1141 | pr_debug("spusched: tick: %d, min ticks: %d, default ticks: %d\n", |
| 1142 | SPUSCHED_TICK, MIN_SPU_TIMESLICE, DEF_SPU_TIMESLICE); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1143 | return 0; |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1144 | |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1145 | out_stop_kthread: |
| 1146 | kthread_stop(spusched_task); |
| 1147 | out_free_spu_prio: |
| 1148 | kfree(spu_prio); |
| 1149 | out: |
| 1150 | return err; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1151 | } |
| 1152 | |
Sebastian Siewior | d145031 | 2007-07-20 21:39:29 +0200 | [diff] [blame] | 1153 | void spu_sched_exit(void) |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1154 | { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 1155 | struct spu *spu; |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 1156 | int node; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1157 | |
Christoph Hellwig | 65de66f | 2007-06-29 10:58:02 +1000 | [diff] [blame] | 1158 | remove_proc_entry("spu_loadavg", NULL); |
| 1159 | |
Christoph Hellwig | c77239b | 2007-06-29 10:58:05 +1000 | [diff] [blame] | 1160 | del_timer_sync(&spusched_timer); |
Aegis Lin | 90608a2 | 2007-12-20 16:39:59 +0900 | [diff] [blame] | 1161 | del_timer_sync(&spuloadavg_timer); |
Christoph Hellwig | 3790180 | 2007-06-29 10:57:51 +1000 | [diff] [blame] | 1162 | kthread_stop(spusched_task); |
| 1163 | |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 1164 | for (node = 0; node < MAX_NUMNODES; node++) { |
Christoph Hellwig | 486acd4 | 2007-07-20 21:39:54 +0200 | [diff] [blame] | 1165 | mutex_lock(&cbe_spu_info[node].list_mutex); |
| 1166 | list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) |
| 1167 | if (spu->alloc_state != SPU_FREE) |
| 1168 | spu->alloc_state = SPU_FREE; |
| 1169 | mutex_unlock(&cbe_spu_info[node].list_mutex); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1170 | } |
Mark Nutter | a68cf98 | 2006-10-04 17:26:12 +0200 | [diff] [blame] | 1171 | kfree(spu_prio); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 1172 | } |