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;
41 struct spu *spu; /* pointer to a physical SPU */
42 struct spu_state csa; /* SPU context save area. */
43 spinlock_t mmio_lock; /* protects mmio access */
44 struct address_space *local_store;/* local store backing store */
46 enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
47 struct rw_semaphore state_sema;
49 struct mm_struct *owner;
52 wait_queue_head_t ibox_wq;
53 wait_queue_head_t wbox_wq;
54 struct fasync_struct *ibox_fasync;
55 struct fasync_struct *wbox_fasync;
56 struct spu_context_ops *ops;
59 /* SPU context query/set operations. */
60 struct spu_context_ops {
61 int (*mbox_read) (struct spu_context * ctx, u32 * data);
62 u32(*mbox_stat_read) (struct spu_context * ctx);
63 int (*ibox_read) (struct spu_context * ctx, u32 * data);
64 int (*wbox_write) (struct spu_context * ctx, u32 data);
65 u32(*signal1_read) (struct spu_context * ctx);
66 void (*signal1_write) (struct spu_context * ctx, u32 data);
67 u32(*signal2_read) (struct spu_context * ctx);
68 void (*signal2_write) (struct spu_context * ctx, u32 data);
69 void (*signal1_type_set) (struct spu_context * ctx, u64 val);
70 u64(*signal1_type_get) (struct spu_context * ctx);
71 void (*signal2_type_set) (struct spu_context * ctx, u64 val);
72 u64(*signal2_type_get) (struct spu_context * ctx);
73 u32(*npc_read) (struct spu_context * ctx);
74 void (*npc_write) (struct spu_context * ctx, u32 data);
75 u32(*status_read) (struct spu_context * ctx);
76 char*(*get_ls) (struct spu_context * ctx);
79 extern struct spu_context_ops spu_hw_ops;
80 extern struct spu_context_ops spu_backing_ops;
82 struct spufs_inode_info {
83 struct spu_context *i_ctx;
84 struct inode vfs_inode;
86 #define SPUFS_I(inode) \
87 container_of(inode, struct spufs_inode_info, vfs_inode)
89 extern struct tree_descr spufs_dir_contents[];
91 /* system call implementation */
92 long spufs_run_spu(struct file *file,
93 struct spu_context *ctx, u32 *npc, u32 *status);
94 long spufs_create_thread(struct nameidata *nd, const char *name,
95 unsigned int flags, mode_t mode);
97 /* context management */
98 struct spu_context * alloc_spu_context(struct address_space *local_store);
99 void destroy_spu_context(struct kref *kref);
100 struct spu_context * get_spu_context(struct spu_context *ctx);
101 int put_spu_context(struct spu_context *ctx);
103 void spu_forget(struct spu_context *ctx);
104 void spu_acquire(struct spu_context *ctx);
105 void spu_release(struct spu_context *ctx);
106 int spu_acquire_runnable(struct spu_context *ctx);
107 void spu_acquire_saved(struct spu_context *ctx);
109 int spu_activate(struct spu_context *ctx, u64 flags);
110 void spu_deactivate(struct spu_context *ctx);
111 void spu_yield(struct spu_context *ctx);
112 int __init spu_sched_init(void);
113 void __exit spu_sched_exit(void);
115 size_t spu_wbox_write(struct spu_context *ctx, u32 data);
116 size_t spu_ibox_read(struct spu_context *ctx, u32 *data);
118 /* irq callback funcs. */
119 void spufs_ibox_callback(struct spu *spu);
120 void spufs_wbox_callback(struct spu *spu);