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>
29 #include <linux/cpumask.h>
32 #include <asm/spu_csa.h>
33 #include <asm/spu_info.h>
35 /* The magic number for our file system */
37 SPUFS_MAGIC
= 0x23c9b64e,
40 struct spu_context_ops
;
44 SPU_SCHED_WAS_ACTIVE
, /* was active upon spu_acquire_saved() */
47 /* ctx->sched_flags */
49 SPU_SCHED_NOTIFY_ACTIVE
,
53 struct spu
*spu
; /* pointer to a physical SPU */
54 struct spu_state csa
; /* SPU context save area. */
55 spinlock_t mmio_lock
; /* protects mmio access */
56 struct address_space
*local_store
; /* local store mapping. */
57 struct address_space
*mfc
; /* 'mfc' area mappings. */
58 struct address_space
*cntl
; /* 'control' area mappings. */
59 struct address_space
*signal1
; /* 'signal1' area mappings. */
60 struct address_space
*signal2
; /* 'signal2' area mappings. */
61 struct address_space
*mss
; /* 'mss' area mappings. */
62 struct address_space
*psmap
; /* 'psmap' area mappings. */
63 struct mutex mapping_lock
;
64 u64 object_id
; /* user space pointer for oprofile */
66 enum { SPU_STATE_RUNNABLE
, SPU_STATE_SAVED
} state
;
67 struct mutex state_mutex
;
68 struct mutex run_mutex
;
70 struct mm_struct
*owner
;
73 wait_queue_head_t ibox_wq
;
74 wait_queue_head_t wbox_wq
;
75 wait_queue_head_t stop_wq
;
76 wait_queue_head_t mfc_wq
;
77 struct fasync_struct
*ibox_fasync
;
78 struct fasync_struct
*wbox_fasync
;
79 struct fasync_struct
*mfc_fasync
;
81 struct spu_context_ops
*ops
;
82 struct work_struct reap_work
;
84 unsigned long event_return
;
86 struct list_head gang_list
;
87 struct spu_gang
*gang
;
88 struct kref
*prof_priv_kref
;
89 void ( * prof_priv_release
) (struct kref
*kref
);
94 /* scheduler fields */
96 unsigned int time_slice
;
97 unsigned long sched_flags
;
98 cpumask_t cpus_allowed
;
104 /* updates protected by ctx->state_mutex */
105 enum spu_utilization_state util_state
;
106 unsigned long long tstamp
; /* time of last state switch */
107 unsigned long long times
[SPU_UTIL_MAX
];
108 unsigned long long vol_ctx_switch
;
109 unsigned long long invol_ctx_switch
;
110 unsigned long long min_flt
;
111 unsigned long long maj_flt
;
112 unsigned long long hash_flt
;
113 unsigned long long slb_flt
;
114 unsigned long long slb_flt_base
; /* # at last ctx switch */
115 unsigned long long class2_intr
;
116 unsigned long long class2_intr_base
; /* # at last ctx switch */
117 unsigned long long libassist
;
120 struct list_head aff_list
;
126 struct list_head list
;
131 struct spu_context
*aff_ref_ctx
;
132 struct list_head aff_list_head
;
133 struct mutex aff_mutex
;
135 struct spu
*aff_ref_spu
;
136 atomic_t aff_sched_count
;
139 /* Flag bits for spu_gang aff_flags */
140 #define AFF_OFFSETS_SET 1
143 struct mfc_dma_command
{
144 int32_t pad
; /* reserved */
145 uint32_t lsa
; /* local storage address */
146 uint64_t ea
; /* effective address */
147 uint16_t size
; /* transfer size */
148 uint16_t tag
; /* command tag */
149 uint16_t class; /* class ID */
150 uint16_t cmd
; /* command opcode */
154 /* SPU context query/set operations. */
155 struct spu_context_ops
{
156 int (*mbox_read
) (struct spu_context
* ctx
, u32
* data
);
157 u32(*mbox_stat_read
) (struct spu_context
* ctx
);
158 unsigned int (*mbox_stat_poll
)(struct spu_context
*ctx
,
159 unsigned int events
);
160 int (*ibox_read
) (struct spu_context
* ctx
, u32
* data
);
161 int (*wbox_write
) (struct spu_context
* ctx
, u32 data
);
162 u32(*signal1_read
) (struct spu_context
* ctx
);
163 void (*signal1_write
) (struct spu_context
* ctx
, u32 data
);
164 u32(*signal2_read
) (struct spu_context
* ctx
);
165 void (*signal2_write
) (struct spu_context
* ctx
, u32 data
);
166 void (*signal1_type_set
) (struct spu_context
* ctx
, u64 val
);
167 u64(*signal1_type_get
) (struct spu_context
* ctx
);
168 void (*signal2_type_set
) (struct spu_context
* ctx
, u64 val
);
169 u64(*signal2_type_get
) (struct spu_context
* ctx
);
170 u32(*npc_read
) (struct spu_context
* ctx
);
171 void (*npc_write
) (struct spu_context
* ctx
, u32 data
);
172 u32(*status_read
) (struct spu_context
* ctx
);
173 char*(*get_ls
) (struct spu_context
* ctx
);
174 u32 (*runcntl_read
) (struct spu_context
* ctx
);
175 void (*runcntl_write
) (struct spu_context
* ctx
, u32 data
);
176 void (*master_start
) (struct spu_context
* ctx
);
177 void (*master_stop
) (struct spu_context
* ctx
);
178 int (*set_mfc_query
)(struct spu_context
* ctx
, u32 mask
, u32 mode
);
179 u32 (*read_mfc_tagstatus
)(struct spu_context
* ctx
);
180 u32 (*get_mfc_free_elements
)(struct spu_context
*ctx
);
181 int (*send_mfc_command
)(struct spu_context
* ctx
,
182 struct mfc_dma_command
* cmd
);
183 void (*dma_info_read
) (struct spu_context
* ctx
,
184 struct spu_dma_info
* info
);
185 void (*proxydma_info_read
) (struct spu_context
* ctx
,
186 struct spu_proxydma_info
* info
);
187 void (*restart_dma
)(struct spu_context
*ctx
);
190 extern struct spu_context_ops spu_hw_ops
;
191 extern struct spu_context_ops spu_backing_ops
;
193 struct spufs_inode_info
{
194 struct spu_context
*i_ctx
;
195 struct spu_gang
*i_gang
;
196 struct inode vfs_inode
;
199 #define SPUFS_I(inode) \
200 container_of(inode, struct spufs_inode_info, vfs_inode)
202 extern struct tree_descr spufs_dir_contents
[];
203 extern struct tree_descr spufs_dir_nosched_contents
[];
205 /* system call implementation */
206 long spufs_run_spu(struct spu_context
*ctx
, u32
*npc
, u32
*status
);
207 long spufs_create(struct nameidata
*nd
, unsigned int flags
,
208 mode_t mode
, struct file
*filp
);
209 extern const struct file_operations spufs_context_fops
;
211 /* gang management */
212 struct spu_gang
*alloc_spu_gang(void);
213 struct spu_gang
*get_spu_gang(struct spu_gang
*gang
);
214 int put_spu_gang(struct spu_gang
*gang
);
215 void spu_gang_remove_ctx(struct spu_gang
*gang
, struct spu_context
*ctx
);
216 void spu_gang_add_ctx(struct spu_gang
*gang
, struct spu_context
*ctx
);
219 int spufs_handle_class1(struct spu_context
*ctx
);
222 struct spu
*affinity_check(struct spu_context
*ctx
);
224 /* context management */
225 extern atomic_t nr_spu_contexts
;
226 static inline void spu_acquire(struct spu_context
*ctx
)
228 mutex_lock(&ctx
->state_mutex
);
231 static inline void spu_release(struct spu_context
*ctx
)
233 mutex_unlock(&ctx
->state_mutex
);
236 struct spu_context
* alloc_spu_context(struct spu_gang
*gang
);
237 void destroy_spu_context(struct kref
*kref
);
238 struct spu_context
* get_spu_context(struct spu_context
*ctx
);
239 int put_spu_context(struct spu_context
*ctx
);
240 void spu_unmap_mappings(struct spu_context
*ctx
);
242 void spu_forget(struct spu_context
*ctx
);
243 int spu_acquire_runnable(struct spu_context
*ctx
, unsigned long flags
);
244 void spu_acquire_saved(struct spu_context
*ctx
);
245 void spu_release_saved(struct spu_context
*ctx
);
247 int spu_activate(struct spu_context
*ctx
, unsigned long flags
);
248 void spu_deactivate(struct spu_context
*ctx
);
249 void spu_yield(struct spu_context
*ctx
);
250 void spu_switch_notify(struct spu
*spu
, struct spu_context
*ctx
);
251 void spu_set_timeslice(struct spu_context
*ctx
);
252 void spu_update_sched_info(struct spu_context
*ctx
);
253 void __spu_update_sched_info(struct spu_context
*ctx
);
254 int __init
spu_sched_init(void);
255 void spu_sched_exit(void);
257 extern char *isolated_loader
;
261 * Same as wait_event_interruptible(), except that here
262 * we need to call spu_release(ctx) before sleeping, and
263 * then spu_acquire(ctx) when awoken.
266 #define spufs_wait(wq, condition) \
269 DEFINE_WAIT(__wait); \
271 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
274 if (signal_pending(current)) { \
275 __ret = -ERESTARTSYS; \
282 finish_wait(&(wq), &__wait); \
286 size_t spu_wbox_write(struct spu_context
*ctx
, u32 data
);
287 size_t spu_ibox_read(struct spu_context
*ctx
, u32
*data
);
289 /* irq callback funcs. */
290 void spufs_ibox_callback(struct spu
*spu
);
291 void spufs_wbox_callback(struct spu
*spu
);
292 void spufs_stop_callback(struct spu
*spu
);
293 void spufs_mfc_callback(struct spu
*spu
);
294 void spufs_dma_callback(struct spu
*spu
, int type
);
296 extern struct spu_coredump_calls spufs_coredump_calls
;
297 struct spufs_coredump_reader
{
299 ssize_t (*read
)(struct spu_context
*ctx
,
300 char __user
*buffer
, size_t size
, loff_t
*pos
);
301 u64 (*get
)(void *data
);
304 extern struct spufs_coredump_reader spufs_coredump_read
[];
305 extern int spufs_coredump_num_notes
;
308 * This function is a little bit too large for an inline, but
309 * as fault.c is built into the kernel we can't move it out of
312 static inline void spuctx_switch_state(struct spu_context
*ctx
,
313 enum spu_utilization_state new_state
)
315 unsigned long long curtime
;
316 signed long long delta
;
319 enum spu_utilization_state old_state
;
322 curtime
= timespec_to_ns(&ts
);
323 delta
= curtime
- ctx
->stats
.tstamp
;
325 WARN_ON(!mutex_is_locked(&ctx
->state_mutex
));
329 old_state
= ctx
->stats
.util_state
;
330 ctx
->stats
.util_state
= new_state
;
331 ctx
->stats
.tstamp
= curtime
;
334 * Update the physical SPU utilization statistics.
337 ctx
->stats
.times
[old_state
] += delta
;
338 spu
->stats
.times
[old_state
] += delta
;
339 spu
->stats
.util_state
= new_state
;
340 spu
->stats
.tstamp
= curtime
;