4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
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)
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.
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.
25 #include <linux/kref.h>
26 #include <linux/rwsem.h>
27 #include <linux/spinlock.h>
31 #include <asm/spu_csa.h>
33 /* The magic number for our file system */
35 SPUFS_MAGIC = 0x23c9b64e,
38 struct spu_context_ops;
40 #define SPU_CONTEXT_PREEMPT 0UL
43 struct spu *spu; /* pointer to a physical SPU */
44 struct spu_state csa; /* SPU context save area. */
45 spinlock_t mmio_lock; /* protects mmio access */
46 struct address_space *local_store;/* local store backing store */
48 enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
49 struct rw_semaphore state_sema;
50 struct semaphore run_sema;
52 struct mm_struct *owner;
55 wait_queue_head_t ibox_wq;
56 wait_queue_head_t wbox_wq;
57 wait_queue_head_t stop_wq;
58 struct fasync_struct *ibox_fasync;
59 struct fasync_struct *wbox_fasync;
60 struct spu_context_ops *ops;
61 struct work_struct reap_work;
65 /* SPU context query/set operations. */
66 struct spu_context_ops {
67 int (*mbox_read) (struct spu_context * ctx, u32 * data);
68 u32(*mbox_stat_read) (struct spu_context * ctx);
69 unsigned int (*mbox_stat_poll)(struct spu_context *ctx,
71 int (*ibox_read) (struct spu_context * ctx, u32 * data);
72 int (*wbox_write) (struct spu_context * ctx, u32 data);
73 u32(*signal1_read) (struct spu_context * ctx);
74 void (*signal1_write) (struct spu_context * ctx, u32 data);
75 u32(*signal2_read) (struct spu_context * ctx);
76 void (*signal2_write) (struct spu_context * ctx, u32 data);
77 void (*signal1_type_set) (struct spu_context * ctx, u64 val);
78 u64(*signal1_type_get) (struct spu_context * ctx);
79 void (*signal2_type_set) (struct spu_context * ctx, u64 val);
80 u64(*signal2_type_get) (struct spu_context * ctx);
81 u32(*npc_read) (struct spu_context * ctx);
82 void (*npc_write) (struct spu_context * ctx, u32 data);
83 u32(*status_read) (struct spu_context * ctx);
84 char*(*get_ls) (struct spu_context * ctx);
85 void (*runcntl_write) (struct spu_context * ctx, u32 data);
86 void (*runcntl_stop) (struct spu_context * ctx);
89 extern struct spu_context_ops spu_hw_ops;
90 extern struct spu_context_ops spu_backing_ops;
92 struct spufs_inode_info {
93 struct spu_context *i_ctx;
94 struct inode vfs_inode;
96 #define SPUFS_I(inode) \
97 container_of(inode, struct spufs_inode_info, vfs_inode)
99 extern struct tree_descr spufs_dir_contents[];
101 /* system call implementation */
102 long spufs_run_spu(struct file *file,
103 struct spu_context *ctx, u32 *npc, u32 *status);
104 long spufs_create_thread(struct nameidata *nd,
105 unsigned int flags, mode_t mode);
106 extern struct file_operations spufs_context_fops;
108 /* context management */
109 struct spu_context * alloc_spu_context(struct address_space *local_store);
110 void destroy_spu_context(struct kref *kref);
111 struct spu_context * get_spu_context(struct spu_context *ctx);
112 int put_spu_context(struct spu_context *ctx);
113 void spu_unmap_mappings(struct spu_context *ctx);
115 void spu_forget(struct spu_context *ctx);
116 void spu_acquire(struct spu_context *ctx);
117 void spu_release(struct spu_context *ctx);
118 int spu_acquire_runnable(struct spu_context *ctx);
119 void spu_acquire_saved(struct spu_context *ctx);
121 int spu_activate(struct spu_context *ctx, u64 flags);
122 void spu_deactivate(struct spu_context *ctx);
123 void spu_yield(struct spu_context *ctx);
124 int __init spu_sched_init(void);
125 void __exit spu_sched_exit(void);
129 * Same as wait_event_interruptible(), except that here
130 * we need to call spu_release(ctx) before sleeping, and
131 * then spu_acquire(ctx) when awoken.
134 #define spufs_wait(wq, condition) \
137 DEFINE_WAIT(__wait); \
139 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
142 if (!signal_pending(current)) { \
148 __ret = -ERESTARTSYS; \
151 finish_wait(&(wq), &__wait); \
155 size_t spu_wbox_write(struct spu_context *ctx, u32 data);
156 size_t spu_ibox_read(struct spu_context *ctx, u32 *data);
158 /* irq callback funcs. */
159 void spufs_ibox_callback(struct spu *spu);
160 void spufs_wbox_callback(struct spu *spu);
161 void spufs_stop_callback(struct spu *spu);