context.c (8b3d6663c6217e4f50cc3720935a96da9b984117) context.c (5110459f181ef1f11200bb3dec61953f08cc49e7)
1/*
2 * SPU file system -- SPU context management
3 *
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
5 *
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify

--- 31 unchanged lines hidden (view full) ---

40 if (!ctx->csa.lscsa) {
41 goto out_free;
42 }
43 spin_lock_init(&ctx->mmio_lock);
44 kref_init(&ctx->kref);
45 init_rwsem(&ctx->state_sema);
46 init_waitqueue_head(&ctx->ibox_wq);
47 init_waitqueue_head(&ctx->wbox_wq);
1/*
2 * SPU file system -- SPU context management
3 *
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
5 *
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify

--- 31 unchanged lines hidden (view full) ---

40 if (!ctx->csa.lscsa) {
41 goto out_free;
42 }
43 spin_lock_init(&ctx->mmio_lock);
44 kref_init(&ctx->kref);
45 init_rwsem(&ctx->state_sema);
46 init_waitqueue_head(&ctx->ibox_wq);
47 init_waitqueue_head(&ctx->wbox_wq);
48 init_waitqueue_head(&ctx->stop_wq);
48 ctx->ibox_fasync = NULL;
49 ctx->wbox_fasync = NULL;
50 ctx->state = SPU_STATE_SAVED;
51 ctx->local_store = local_store;
52 ctx->spu = NULL;
53 ctx->ops = &spu_backing_ops;
54 ctx->owner = get_task_mm(current);
55 goto out;

--- 44 unchanged lines hidden (view full) ---

100 down_read(&ctx->state_sema);
101}
102
103void spu_release(struct spu_context *ctx)
104{
105 up_read(&ctx->state_sema);
106}
107
49 ctx->ibox_fasync = NULL;
50 ctx->wbox_fasync = NULL;
51 ctx->state = SPU_STATE_SAVED;
52 ctx->local_store = local_store;
53 ctx->spu = NULL;
54 ctx->ops = &spu_backing_ops;
55 ctx->owner = get_task_mm(current);
56 goto out;

--- 44 unchanged lines hidden (view full) ---

101 down_read(&ctx->state_sema);
102}
103
104void spu_release(struct spu_context *ctx)
105{
106 up_read(&ctx->state_sema);
107}
108
108static void spu_unmap_mappings(struct spu_context *ctx)
109void spu_unmap_mappings(struct spu_context *ctx)
109{
110 unmap_mapping_range(ctx->local_store, 0, LS_SIZE, 1);
111}
112
113int spu_acquire_runnable(struct spu_context *ctx)
114{
115 int ret = 0;
116

--- 4 unchanged lines hidden (view full) ---

121 if (!ctx->owner) {
122 ret = -EINVAL;
123 goto out;
124 }
125 up_read(&ctx->state_sema);
126
127 down_write(&ctx->state_sema);
128 if (ctx->state == SPU_STATE_SAVED) {
110{
111 unmap_mapping_range(ctx->local_store, 0, LS_SIZE, 1);
112}
113
114int spu_acquire_runnable(struct spu_context *ctx)
115{
116 int ret = 0;
117

--- 4 unchanged lines hidden (view full) ---

122 if (!ctx->owner) {
123 ret = -EINVAL;
124 goto out;
125 }
126 up_read(&ctx->state_sema);
127
128 down_write(&ctx->state_sema);
129 if (ctx->state == SPU_STATE_SAVED) {
129 spu_unmap_mappings(ctx);
130 ret = spu_activate(ctx, 0);
131 ctx->state = SPU_STATE_RUNNABLE;
132 }
133 downgrade_write(&ctx->state_sema);
134 if (ret)
135 goto out;
136
137 /* On success, we return holding the lock */

--- 11 unchanged lines hidden (view full) ---

149
150 if (ctx->state == SPU_STATE_SAVED)
151 return;
152
153 up_read(&ctx->state_sema);
154 down_write(&ctx->state_sema);
155
156 if (ctx->state == SPU_STATE_RUNNABLE) {
130 ret = spu_activate(ctx, 0);
131 ctx->state = SPU_STATE_RUNNABLE;
132 }
133 downgrade_write(&ctx->state_sema);
134 if (ret)
135 goto out;
136
137 /* On success, we return holding the lock */

--- 11 unchanged lines hidden (view full) ---

149
150 if (ctx->state == SPU_STATE_SAVED)
151 return;
152
153 up_read(&ctx->state_sema);
154 down_write(&ctx->state_sema);
155
156 if (ctx->state == SPU_STATE_RUNNABLE) {
157 spu_unmap_mappings(ctx);
158 spu_deactivate(ctx);
159 ctx->state = SPU_STATE_SAVED;
160 }
161
162 downgrade_write(&ctx->state_sema);
163}
157 spu_deactivate(ctx);
158 ctx->state = SPU_STATE_SAVED;
159 }
160
161 downgrade_write(&ctx->state_sema);
162}