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67207b96 AB |
1 | /* |
2 | * SPU file system | |
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 | |
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) | |
11 | * any later version. | |
12 | * | |
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. | |
17 | * | |
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. | |
21 | */ | |
22 | #ifndef SPUFS_H | |
23 | #define SPUFS_H | |
24 | ||
25 | #include <linux/kref.h> | |
650f8b02 | 26 | #include <linux/mutex.h> |
67207b96 AB |
27 | #include <linux/spinlock.h> |
28 | #include <linux/fs.h> | |
ea1ae594 | 29 | #include <linux/cpumask.h> |
67207b96 AB |
30 | |
31 | #include <asm/spu.h> | |
5473af04 | 32 | #include <asm/spu_csa.h> |
b9e3bd77 | 33 | #include <asm/spu_info.h> |
67207b96 AB |
34 | |
35 | /* The magic number for our file system */ | |
36 | enum { | |
37 | SPUFS_MAGIC = 0x23c9b64e, | |
38 | }; | |
39 | ||
8b3d6663 | 40 | struct spu_context_ops; |
6263203e AB |
41 | struct spu_gang; |
42 | ||
27b1ea09 CH |
43 | enum { |
44 | SPU_SCHED_WAS_ACTIVE, /* was active upon spu_acquire_saved() */ | |
45 | }; | |
46 | ||
36aaccc1 BN |
47 | /* ctx->sched_flags */ |
48 | enum { | |
49 | SPU_SCHED_NOTIFY_ACTIVE, | |
50 | }; | |
51 | ||
67207b96 AB |
52 | struct spu_context { |
53 | struct spu *spu; /* pointer to a physical SPU */ | |
5473af04 | 54 | struct spu_state csa; /* SPU context save area. */ |
67207b96 | 55 | spinlock_t mmio_lock; /* protects mmio access */ |
6df10a82 MN |
56 | struct address_space *local_store; /* local store mapping. */ |
57 | struct address_space *mfc; /* 'mfc' area mappings. */ | |
43c2bbd9 CH |
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. */ | |
47d3a5fa | 63 | struct mutex mapping_lock; |
86767277 | 64 | u64 object_id; /* user space pointer for oprofile */ |
8b3d6663 AB |
65 | |
66 | enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; | |
650f8b02 | 67 | struct mutex state_mutex; |
e45d48a3 | 68 | struct mutex run_mutex; |
8b3d6663 AB |
69 | |
70 | struct mm_struct *owner; | |
67207b96 AB |
71 | |
72 | struct kref kref; | |
8b3d6663 AB |
73 | wait_queue_head_t ibox_wq; |
74 | wait_queue_head_t wbox_wq; | |
5110459f | 75 | wait_queue_head_t stop_wq; |
a33a7d73 | 76 | wait_queue_head_t mfc_wq; |
8b3d6663 AB |
77 | struct fasync_struct *ibox_fasync; |
78 | struct fasync_struct *wbox_fasync; | |
a33a7d73 AB |
79 | struct fasync_struct *mfc_fasync; |
80 | u32 tagwait; | |
8b3d6663 | 81 | struct spu_context_ops *ops; |
2a911f0b | 82 | struct work_struct reap_work; |
9add11da AB |
83 | unsigned long flags; |
84 | unsigned long event_return; | |
6263203e AB |
85 | |
86 | struct list_head gang_list; | |
87 | struct spu_gang *gang; | |
1474855d BN |
88 | struct kref *prof_priv_kref; |
89 | void ( * prof_priv_release) (struct kref *kref); | |
8389998a | 90 | |
476273ad CH |
91 | /* owner thread */ |
92 | pid_t tid; | |
93 | ||
8389998a | 94 | /* scheduler fields */ |
7022543e | 95 | struct list_head rq; |
37901802 | 96 | unsigned int time_slice; |
26bec673 | 97 | unsigned long sched_flags; |
ea1ae594 | 98 | cpumask_t cpus_allowed; |
2eb1b120 | 99 | int policy; |
8389998a | 100 | int prio; |
e9f8a0b6 CH |
101 | |
102 | /* statistics */ | |
103 | struct { | |
104 | /* updates protected by ctx->state_mutex */ | |
27ec41d3 AD |
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]; | |
e9f8a0b6 CH |
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; | |
118 | } stats; | |
8e68e2f2 AB |
119 | |
120 | struct list_head aff_list; | |
121 | int aff_head; | |
c5fc8d2a | 122 | int aff_offset; |
6263203e AB |
123 | }; |
124 | ||
125 | struct spu_gang { | |
126 | struct list_head list; | |
127 | struct mutex mutex; | |
128 | struct kref kref; | |
129 | int contexts; | |
8e68e2f2 AB |
130 | |
131 | struct spu_context *aff_ref_ctx; | |
132 | struct list_head aff_list_head; | |
133 | struct mutex aff_mutex; | |
134 | int aff_flags; | |
c5fc8d2a AB |
135 | struct spu *aff_ref_spu; |
136 | atomic_t aff_sched_count; | |
8b3d6663 AB |
137 | }; |
138 | ||
8e68e2f2 AB |
139 | /* Flag bits for spu_gang aff_flags */ |
140 | #define AFF_OFFSETS_SET 1 | |
141 | #define AFF_MERGED 2 | |
142 | ||
a33a7d73 AB |
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 */ | |
151 | }; | |
152 | ||
153 | ||
8b3d6663 AB |
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); | |
3a843d7c AB |
158 | unsigned int (*mbox_stat_poll)(struct spu_context *ctx, |
159 | unsigned int events); | |
8b3d6663 AB |
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); | |
3960c260 | 174 | u32 (*runcntl_read) (struct spu_context * ctx); |
5110459f | 175 | void (*runcntl_write) (struct spu_context * ctx, u32 data); |
ee2d7340 AB |
176 | void (*master_start) (struct spu_context * ctx); |
177 | void (*master_stop) (struct spu_context * ctx); | |
a33a7d73 AB |
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); | |
b9e3bd77 DGM |
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); | |
57dace23 | 187 | void (*restart_dma)(struct spu_context *ctx); |
67207b96 AB |
188 | }; |
189 | ||
8b3d6663 AB |
190 | extern struct spu_context_ops spu_hw_ops; |
191 | extern struct spu_context_ops spu_backing_ops; | |
192 | ||
67207b96 AB |
193 | struct spufs_inode_info { |
194 | struct spu_context *i_ctx; | |
6263203e | 195 | struct spu_gang *i_gang; |
67207b96 | 196 | struct inode vfs_inode; |
43c2bbd9 | 197 | int i_openers; |
67207b96 AB |
198 | }; |
199 | #define SPUFS_I(inode) \ | |
200 | container_of(inode, struct spufs_inode_info, vfs_inode) | |
201 | ||
202 | extern struct tree_descr spufs_dir_contents[]; | |
5737edd1 | 203 | extern struct tree_descr spufs_dir_nosched_contents[]; |
67207b96 AB |
204 | |
205 | /* system call implementation */ | |
50af32a9 | 206 | long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status); |
8e68e2f2 AB |
207 | long spufs_create(struct nameidata *nd, unsigned int flags, |
208 | mode_t mode, struct file *filp); | |
9c2e08c5 | 209 | extern const struct file_operations spufs_context_fops; |
67207b96 | 210 | |
6263203e AB |
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); | |
217 | ||
57dace23 AB |
218 | /* fault handling */ |
219 | int spufs_handle_class1(struct spu_context *ctx); | |
220 | ||
c5fc8d2a AB |
221 | /* affinity */ |
222 | struct spu *affinity_check(struct spu_context *ctx); | |
223 | ||
67207b96 | 224 | /* context management */ |
65de66f0 | 225 | extern atomic_t nr_spu_contexts; |
6a0641e5 CH |
226 | static inline void spu_acquire(struct spu_context *ctx) |
227 | { | |
228 | mutex_lock(&ctx->state_mutex); | |
229 | } | |
230 | ||
231 | static inline void spu_release(struct spu_context *ctx) | |
232 | { | |
233 | mutex_unlock(&ctx->state_mutex); | |
234 | } | |
235 | ||
6263203e | 236 | struct spu_context * alloc_spu_context(struct spu_gang *gang); |
67207b96 AB |
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); | |
5110459f | 240 | void spu_unmap_mappings(struct spu_context *ctx); |
67207b96 | 241 | |
8b3d6663 | 242 | void spu_forget(struct spu_context *ctx); |
26bec673 | 243 | int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags); |
67207b96 | 244 | void spu_acquire_saved(struct spu_context *ctx); |
27b1ea09 | 245 | void spu_release_saved(struct spu_context *ctx); |
50b520d4 | 246 | |
26bec673 | 247 | int spu_activate(struct spu_context *ctx, unsigned long flags); |
8b3d6663 AB |
248 | void spu_deactivate(struct spu_context *ctx); |
249 | void spu_yield(struct spu_context *ctx); | |
36aaccc1 | 250 | void spu_switch_notify(struct spu *spu, struct spu_context *ctx); |
fe443ef2 | 251 | void spu_set_timeslice(struct spu_context *ctx); |
2cf2b3b4 CH |
252 | void spu_update_sched_info(struct spu_context *ctx); |
253 | void __spu_update_sched_info(struct spu_context *ctx); | |
8b3d6663 | 254 | int __init spu_sched_init(void); |
d1450317 | 255 | void spu_sched_exit(void); |
8b3d6663 | 256 | |
c6730ed4 JK |
257 | extern char *isolated_loader; |
258 | ||
ce8ab854 AB |
259 | /* |
260 | * spufs_wait | |
7022543e | 261 | * Same as wait_event_interruptible(), except that here |
ce8ab854 AB |
262 | * we need to call spu_release(ctx) before sleeping, and |
263 | * then spu_acquire(ctx) when awoken. | |
264 | */ | |
265 | ||
266 | #define spufs_wait(wq, condition) \ | |
267 | ({ \ | |
268 | int __ret = 0; \ | |
269 | DEFINE_WAIT(__wait); \ | |
270 | for (;;) { \ | |
271 | prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \ | |
272 | if (condition) \ | |
273 | break; \ | |
d3764397 JK |
274 | if (signal_pending(current)) { \ |
275 | __ret = -ERESTARTSYS; \ | |
276 | break; \ | |
ce8ab854 | 277 | } \ |
d3764397 JK |
278 | spu_release(ctx); \ |
279 | schedule(); \ | |
280 | spu_acquire(ctx); \ | |
ce8ab854 AB |
281 | } \ |
282 | finish_wait(&(wq), &__wait); \ | |
283 | __ret; \ | |
284 | }) | |
285 | ||
8b3d6663 AB |
286 | size_t spu_wbox_write(struct spu_context *ctx, u32 data); |
287 | size_t spu_ibox_read(struct spu_context *ctx, u32 *data); | |
288 | ||
289 | /* irq callback funcs. */ | |
290 | void spufs_ibox_callback(struct spu *spu); | |
291 | void spufs_wbox_callback(struct spu *spu); | |
5110459f | 292 | void spufs_stop_callback(struct spu *spu); |
a33a7d73 | 293 | void spufs_mfc_callback(struct spu *spu); |
9add11da | 294 | void spufs_dma_callback(struct spu *spu, int type); |
8b3d6663 | 295 | |
bf1ab978 DGM |
296 | extern struct spu_coredump_calls spufs_coredump_calls; |
297 | struct spufs_coredump_reader { | |
298 | char *name; | |
299 | ssize_t (*read)(struct spu_context *ctx, | |
300 | char __user *buffer, size_t size, loff_t *pos); | |
301 | u64 (*get)(void *data); | |
302 | size_t size; | |
303 | }; | |
304 | extern struct spufs_coredump_reader spufs_coredump_read[]; | |
305 | extern int spufs_coredump_num_notes; | |
306 | ||
e9f8a0b6 CH |
307 | /* |
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 | |
310 | * line. | |
311 | */ | |
312 | static inline void spuctx_switch_state(struct spu_context *ctx, | |
27ec41d3 | 313 | enum spu_utilization_state new_state) |
e9f8a0b6 | 314 | { |
27ec41d3 AD |
315 | unsigned long long curtime; |
316 | signed long long delta; | |
317 | struct timespec ts; | |
318 | struct spu *spu; | |
319 | enum spu_utilization_state old_state; | |
e9f8a0b6 | 320 | |
27ec41d3 AD |
321 | ktime_get_ts(&ts); |
322 | curtime = timespec_to_ns(&ts); | |
323 | delta = curtime - ctx->stats.tstamp; | |
e9f8a0b6 | 324 | |
27ec41d3 AD |
325 | WARN_ON(!mutex_is_locked(&ctx->state_mutex)); |
326 | WARN_ON(delta < 0); | |
327 | ||
328 | spu = ctx->spu; | |
329 | old_state = ctx->stats.util_state; | |
330 | ctx->stats.util_state = new_state; | |
331 | ctx->stats.tstamp = curtime; | |
332 | ||
333 | /* | |
334 | * Update the physical SPU utilization statistics. | |
335 | */ | |
336 | if (spu) { | |
337 | ctx->stats.times[old_state] += delta; | |
338 | spu->stats.times[old_state] += delta; | |
339 | spu->stats.util_state = new_state; | |
fe2f896d | 340 | spu->stats.tstamp = curtime; |
fe2f896d CH |
341 | } |
342 | } | |
343 | ||
67207b96 | 344 | #endif |