cell/spufs/context.c

27 	struct spu_context *ctx;
29 	ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
30 	if (!ctx)
35 	if (spu_init_csa(&ctx->csa))
37 	spin_lock_init(&ctx->mmio_lock);
38 	mutex_init(&ctx->mapping_lock);
39 	kref_init(&ctx->kref);
40 	mutex_init(&ctx->state_mutex);
41 	mutex_init(&ctx->run_mutex);
42 	init_waitqueue_head(&ctx->ibox_wq);
43 	init_waitqueue_head(&ctx->wbox_wq);
44 	init_waitqueue_head(&ctx->stop_wq);
45 	init_waitqueue_head(&ctx->mfc_wq);
46 	init_waitqueue_head(&ctx->run_wq);
47 	ctx->state = SPU_STATE_SAVED;
48 	ctx->ops = &spu_backing_ops;
49 	ctx->owner = get_task_mm(current);
50 	INIT_LIST_HEAD(&ctx->rq);
51 	INIT_LIST_HEAD(&ctx->aff_list);
53 		spu_gang_add_ctx(gang, ctx);
55 	__spu_update_sched_info(ctx);
56 	spu_set_timeslice(ctx);
57 	ctx->stats.util_state = SPU_UTIL_IDLE_LOADED;
58 	ctx->stats.tstamp = ktime_get_ns();
63 	kfree(ctx);
64 	ctx = NULL;
66 	return ctx;
71 	struct spu_context *ctx;
72 	ctx = container_of(kref, struct spu_context, kref);
73 	spu_context_nospu_trace(destroy_spu_context__enter, ctx);
74 	mutex_lock(&ctx->state_mutex);
75 	spu_deactivate(ctx);
76 	mutex_unlock(&ctx->state_mutex);
77 	spu_fini_csa(&ctx->csa);
78 	if (ctx->gang)
79 		spu_gang_remove_ctx(ctx->gang, ctx);
80 	if (ctx->prof_priv_kref)
81 		kref_put(ctx->prof_priv_kref, ctx->prof_priv_release);
82 	BUG_ON(!list_empty(&ctx->rq));
84 	kfree(ctx->switch_log);
85 	kfree(ctx);
88 struct spu_context * get_spu_context(struct spu_context *ctx)
90 	kref_get(&ctx->kref);
91 	return ctx;
94 int put_spu_context(struct spu_context *ctx)
96 	return kref_put(&ctx->kref, &destroy_spu_context);
100 void spu_forget(struct spu_context *ctx)
109 	mutex_lock(&ctx->state_mutex);
110 	if (ctx->state != SPU_STATE_SAVED)
111 		spu_deactivate(ctx);
113 	mm = ctx->owner;
114 	ctx->owner = NULL;
116 	spu_release(ctx);
119 void spu_unmap_mappings(struct spu_context *ctx)
121 	mutex_lock(&ctx->mapping_lock);
122 	if (ctx->local_store)
123 		unmap_mapping_range(ctx->local_store, 0, LS_SIZE, 1);
124 	if (ctx->mfc)
125 		unmap_mapping_range(ctx->mfc, 0, SPUFS_MFC_MAP_SIZE, 1);
126 	if (ctx->cntl)
127 		unmap_mapping_range(ctx->cntl, 0, SPUFS_CNTL_MAP_SIZE, 1);
128 	if (ctx->signal1)
129 		unmap_mapping_range(ctx->signal1, 0, SPUFS_SIGNAL_MAP_SIZE, 1);
130 	if (ctx->signal2)
131 		unmap_mapping_range(ctx->signal2, 0, SPUFS_SIGNAL_MAP_SIZE, 1);
132 	if (ctx->mss)
133 		unmap_mapping_range(ctx->mss, 0, SPUFS_MSS_MAP_SIZE, 1);
134 	if (ctx->psmap)
135 		unmap_mapping_range(ctx->psmap, 0, SPUFS_PS_MAP_SIZE, 1);
136 	mutex_unlock(&ctx->mapping_lock);
141  * @ctx:	spu contex to lock
143 int spu_acquire_saved(struct spu_context *ctx)
147 	spu_context_nospu_trace(spu_acquire_saved__enter, ctx);
149 	ret = spu_acquire(ctx);
153 	if (ctx->state != SPU_STATE_SAVED) {
154 		set_bit(SPU_SCHED_WAS_ACTIVE, &ctx->sched_flags);
155 		spu_deactivate(ctx);
163  * @ctx:	context to unlock
165 void spu_release_saved(struct spu_context *ctx)
167 	BUG_ON(ctx->state != SPU_STATE_SAVED);
169 	if (test_and_clear_bit(SPU_SCHED_WAS_ACTIVE, &ctx->sched_flags) &&
170 			test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags))
171 		spu_activate(ctx, 0);
173 	spu_release(ctx);