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/mutex.h>
27 #include <linux/spinlock.h>
31 #include <asm/spu_csa.h>
32 #include <asm/spu_info.h>
34 /* The magic number for our file system */
36 SPUFS_MAGIC
= 0x23c9b64e,
39 struct spu_context_ops
;
42 /* ctx->sched_flags */
44 SPU_SCHED_WAKE
= 0, /* currently unused */
48 struct spu
*spu
; /* pointer to a physical SPU */
49 struct spu_state csa
; /* SPU context save area. */
50 spinlock_t mmio_lock
; /* protects mmio access */
51 struct address_space
*local_store
; /* local store mapping. */
52 struct address_space
*mfc
; /* 'mfc' area mappings. */
53 struct address_space
*cntl
; /* 'control' area mappings. */
54 struct address_space
*signal1
; /* 'signal1' area mappings. */
55 struct address_space
*signal2
; /* 'signal2' area mappings. */
56 struct address_space
*mss
; /* 'mss' area mappings. */
57 struct address_space
*psmap
; /* 'psmap' area mappings. */
58 u64 object_id
; /* user space pointer for oprofile */
60 enum { SPU_STATE_RUNNABLE
, SPU_STATE_SAVED
} state
;
61 struct mutex state_mutex
;
62 struct semaphore run_sema
;
64 struct mm_struct
*owner
;
67 wait_queue_head_t ibox_wq
;
68 wait_queue_head_t wbox_wq
;
69 wait_queue_head_t stop_wq
;
70 wait_queue_head_t mfc_wq
;
71 struct fasync_struct
*ibox_fasync
;
72 struct fasync_struct
*wbox_fasync
;
73 struct fasync_struct
*mfc_fasync
;
75 struct spu_context_ops
*ops
;
76 struct work_struct reap_work
;
78 unsigned long event_return
;
80 struct list_head gang_list
;
81 struct spu_gang
*gang
;
83 /* scheduler fields */
85 struct delayed_work sched_work
;
86 unsigned long sched_flags
;
87 unsigned long rt_priority
;
93 struct list_head list
;
99 struct mfc_dma_command
{
100 int32_t pad
; /* reserved */
101 uint32_t lsa
; /* local storage address */
102 uint64_t ea
; /* effective address */
103 uint16_t size
; /* transfer size */
104 uint16_t tag
; /* command tag */
105 uint16_t class; /* class ID */
106 uint16_t cmd
; /* command opcode */
110 /* SPU context query/set operations. */
111 struct spu_context_ops
{
112 int (*mbox_read
) (struct spu_context
* ctx
, u32
* data
);
113 u32(*mbox_stat_read
) (struct spu_context
* ctx
);
114 unsigned int (*mbox_stat_poll
)(struct spu_context
*ctx
,
115 unsigned int events
);
116 int (*ibox_read
) (struct spu_context
* ctx
, u32
* data
);
117 int (*wbox_write
) (struct spu_context
* ctx
, u32 data
);
118 u32(*signal1_read
) (struct spu_context
* ctx
);
119 void (*signal1_write
) (struct spu_context
* ctx
, u32 data
);
120 u32(*signal2_read
) (struct spu_context
* ctx
);
121 void (*signal2_write
) (struct spu_context
* ctx
, u32 data
);
122 void (*signal1_type_set
) (struct spu_context
* ctx
, u64 val
);
123 u64(*signal1_type_get
) (struct spu_context
* ctx
);
124 void (*signal2_type_set
) (struct spu_context
* ctx
, u64 val
);
125 u64(*signal2_type_get
) (struct spu_context
* ctx
);
126 u32(*npc_read
) (struct spu_context
* ctx
);
127 void (*npc_write
) (struct spu_context
* ctx
, u32 data
);
128 u32(*status_read
) (struct spu_context
* ctx
);
129 char*(*get_ls
) (struct spu_context
* ctx
);
130 u32 (*runcntl_read
) (struct spu_context
* ctx
);
131 void (*runcntl_write
) (struct spu_context
* ctx
, u32 data
);
132 void (*master_start
) (struct spu_context
* ctx
);
133 void (*master_stop
) (struct spu_context
* ctx
);
134 int (*set_mfc_query
)(struct spu_context
* ctx
, u32 mask
, u32 mode
);
135 u32 (*read_mfc_tagstatus
)(struct spu_context
* ctx
);
136 u32 (*get_mfc_free_elements
)(struct spu_context
*ctx
);
137 int (*send_mfc_command
)(struct spu_context
* ctx
,
138 struct mfc_dma_command
* cmd
);
139 void (*dma_info_read
) (struct spu_context
* ctx
,
140 struct spu_dma_info
* info
);
141 void (*proxydma_info_read
) (struct spu_context
* ctx
,
142 struct spu_proxydma_info
* info
);
145 extern struct spu_context_ops spu_hw_ops
;
146 extern struct spu_context_ops spu_backing_ops
;
148 struct spufs_inode_info
{
149 struct spu_context
*i_ctx
;
150 struct spu_gang
*i_gang
;
151 struct inode vfs_inode
;
153 #define SPUFS_I(inode) \
154 container_of(inode, struct spufs_inode_info, vfs_inode)
156 extern struct tree_descr spufs_dir_contents
[];
157 extern struct tree_descr spufs_dir_nosched_contents
[];
159 /* system call implementation */
160 long spufs_run_spu(struct file
*file
,
161 struct spu_context
*ctx
, u32
*npc
, u32
*status
);
162 long spufs_create(struct nameidata
*nd
,
163 unsigned int flags
, mode_t mode
);
164 extern const struct file_operations spufs_context_fops
;
166 /* gang management */
167 struct spu_gang
*alloc_spu_gang(void);
168 struct spu_gang
*get_spu_gang(struct spu_gang
*gang
);
169 int put_spu_gang(struct spu_gang
*gang
);
170 void spu_gang_remove_ctx(struct spu_gang
*gang
, struct spu_context
*ctx
);
171 void spu_gang_add_ctx(struct spu_gang
*gang
, struct spu_context
*ctx
);
173 /* context management */
174 static inline void spu_acquire(struct spu_context
*ctx
)
176 mutex_lock(&ctx
->state_mutex
);
179 static inline void spu_release(struct spu_context
*ctx
)
181 mutex_unlock(&ctx
->state_mutex
);
184 struct spu_context
* alloc_spu_context(struct spu_gang
*gang
);
185 void destroy_spu_context(struct kref
*kref
);
186 struct spu_context
* get_spu_context(struct spu_context
*ctx
);
187 int put_spu_context(struct spu_context
*ctx
);
188 void spu_unmap_mappings(struct spu_context
*ctx
);
190 void spu_forget(struct spu_context
*ctx
);
191 int spu_acquire_runnable(struct spu_context
*ctx
, unsigned long flags
);
192 void spu_acquire_saved(struct spu_context
*ctx
);
193 int spu_acquire_exclusive(struct spu_context
*ctx
);
195 int spu_activate(struct spu_context
*ctx
, unsigned long flags
);
196 void spu_deactivate(struct spu_context
*ctx
);
197 void spu_yield(struct spu_context
*ctx
);
198 void spu_start_tick(struct spu_context
*ctx
);
199 void spu_stop_tick(struct spu_context
*ctx
);
200 void spu_sched_tick(struct work_struct
*work
);
201 int __init
spu_sched_init(void);
202 void __exit
spu_sched_exit(void);
204 extern char *isolated_loader
;
208 * Same as wait_event_interruptible(), except that here
209 * we need to call spu_release(ctx) before sleeping, and
210 * then spu_acquire(ctx) when awoken.
213 #define spufs_wait(wq, condition) \
216 DEFINE_WAIT(__wait); \
218 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
221 if (!signal_pending(current)) { \
227 __ret = -ERESTARTSYS; \
230 finish_wait(&(wq), &__wait); \
234 size_t spu_wbox_write(struct spu_context
*ctx
, u32 data
);
235 size_t spu_ibox_read(struct spu_context
*ctx
, u32
*data
);
237 /* irq callback funcs. */
238 void spufs_ibox_callback(struct spu
*spu
);
239 void spufs_wbox_callback(struct spu
*spu
);
240 void spufs_stop_callback(struct spu
*spu
);
241 void spufs_mfc_callback(struct spu
*spu
);
242 void spufs_dma_callback(struct spu
*spu
, int type
);
244 extern struct spu_coredump_calls spufs_coredump_calls
;
245 struct spufs_coredump_reader
{
247 ssize_t (*read
)(struct spu_context
*ctx
,
248 char __user
*buffer
, size_t size
, loff_t
*pos
);
249 u64 (*get
)(void *data
);
252 extern struct spufs_coredump_reader spufs_coredump_read
[];
253 extern int spufs_coredump_num_notes
;