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22#ifndef SPUFS_H
23#define SPUFS_H
24
25#include <linux/kref.h>
26#include <linux/mutex.h>
27#include <linux/spinlock.h>
28#include <linux/fs.h>
29#include <linux/cpumask.h>
30#include <linux/sched/signal.h>
31
32#include <asm/spu.h>
33#include <asm/spu_csa.h>
34#include <asm/spu_info.h>
35
36#define SPUFS_PS_MAP_SIZE 0x20000
37#define SPUFS_MFC_MAP_SIZE 0x1000
38#define SPUFS_CNTL_MAP_SIZE 0x1000
39#define SPUFS_SIGNAL_MAP_SIZE PAGE_SIZE
40#define SPUFS_MSS_MAP_SIZE 0x1000
41
42
43enum {
44 SPUFS_MAGIC = 0x23c9b64e,
45};
46
47struct spu_context_ops;
48struct spu_gang;
49
50
51enum {
52 SPU_SCHED_NOTIFY_ACTIVE,
53 SPU_SCHED_WAS_ACTIVE,
54 SPU_SCHED_SPU_RUN,
55};
56
57enum {
58 SWITCH_LOG_BUFSIZE = 4096,
59};
60
61enum {
62 SWITCH_LOG_START,
63 SWITCH_LOG_STOP,
64 SWITCH_LOG_EXIT,
65};
66
67struct switch_log {
68 wait_queue_head_t wait;
69 unsigned long head;
70 unsigned long tail;
71 struct switch_log_entry {
72 struct timespec tstamp;
73 s32 spu_id;
74 u32 type;
75 u32 val;
76 u64 timebase;
77 } log[];
78};
79
80struct spu_context {
81 struct spu *spu;
82 struct spu_state csa;
83 spinlock_t mmio_lock;
84 struct address_space *local_store;
85 struct address_space *mfc;
86 struct address_space *cntl;
87 struct address_space *signal1;
88 struct address_space *signal2;
89 struct address_space *mss;
90 struct address_space *psmap;
91 struct mutex mapping_lock;
92 u64 object_id;
93
94 enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
95 struct mutex state_mutex;
96 struct mutex run_mutex;
97
98 struct mm_struct *owner;
99
100 struct kref kref;
101 wait_queue_head_t ibox_wq;
102 wait_queue_head_t wbox_wq;
103 wait_queue_head_t stop_wq;
104 wait_queue_head_t mfc_wq;
105 wait_queue_head_t run_wq;
106 u32 tagwait;
107 struct spu_context_ops *ops;
108 struct work_struct reap_work;
109 unsigned long flags;
110 unsigned long event_return;
111
112 struct list_head gang_list;
113 struct spu_gang *gang;
114 struct kref *prof_priv_kref;
115 void ( * prof_priv_release) (struct kref *kref);
116
117
118 pid_t tid;
119
120
121 struct list_head rq;
122 unsigned int time_slice;
123 unsigned long sched_flags;
124 cpumask_t cpus_allowed;
125 int policy;
126 int prio;
127 int last_ran;
128
129
130 struct {
131
132 enum spu_utilization_state util_state;
133 unsigned long long tstamp;
134 unsigned long long times[SPU_UTIL_MAX];
135 unsigned long long vol_ctx_switch;
136 unsigned long long invol_ctx_switch;
137 unsigned long long min_flt;
138 unsigned long long maj_flt;
139 unsigned long long hash_flt;
140 unsigned long long slb_flt;
141 unsigned long long slb_flt_base;
142 unsigned long long class2_intr;
143 unsigned long long class2_intr_base;
144 unsigned long long libassist;
145 } stats;
146
147
148 struct switch_log *switch_log;
149
150 struct list_head aff_list;
151 int aff_head;
152 int aff_offset;
153};
154
155struct spu_gang {
156 struct list_head list;
157 struct mutex mutex;
158 struct kref kref;
159 int contexts;
160
161 struct spu_context *aff_ref_ctx;
162 struct list_head aff_list_head;
163 struct mutex aff_mutex;
164 int aff_flags;
165 struct spu *aff_ref_spu;
166 atomic_t aff_sched_count;
167};
168
169
170#define AFF_OFFSETS_SET 1
171#define AFF_MERGED 2
172
173struct mfc_dma_command {
174 int32_t pad;
175 uint32_t lsa;
176 uint64_t ea;
177 uint16_t size;
178 uint16_t tag;
179 uint16_t class;
180 uint16_t cmd;
181};
182
183
184
185struct spu_context_ops {
186 int (*mbox_read) (struct spu_context * ctx, u32 * data);
187 u32(*mbox_stat_read) (struct spu_context * ctx);
188 unsigned int (*mbox_stat_poll)(struct spu_context *ctx,
189 unsigned int events);
190 int (*ibox_read) (struct spu_context * ctx, u32 * data);
191 int (*wbox_write) (struct spu_context * ctx, u32 data);
192 u32(*signal1_read) (struct spu_context * ctx);
193 void (*signal1_write) (struct spu_context * ctx, u32 data);
194 u32(*signal2_read) (struct spu_context * ctx);
195 void (*signal2_write) (struct spu_context * ctx, u32 data);
196 void (*signal1_type_set) (struct spu_context * ctx, u64 val);
197 u64(*signal1_type_get) (struct spu_context * ctx);
198 void (*signal2_type_set) (struct spu_context * ctx, u64 val);
199 u64(*signal2_type_get) (struct spu_context * ctx);
200 u32(*npc_read) (struct spu_context * ctx);
201 void (*npc_write) (struct spu_context * ctx, u32 data);
202 u32(*status_read) (struct spu_context * ctx);
203 char*(*get_ls) (struct spu_context * ctx);
204 void (*privcntl_write) (struct spu_context *ctx, u64 data);
205 u32 (*runcntl_read) (struct spu_context * ctx);
206 void (*runcntl_write) (struct spu_context * ctx, u32 data);
207 void (*runcntl_stop) (struct spu_context * ctx);
208 void (*master_start) (struct spu_context * ctx);
209 void (*master_stop) (struct spu_context * ctx);
210 int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode);
211 u32 (*read_mfc_tagstatus)(struct spu_context * ctx);
212 u32 (*get_mfc_free_elements)(struct spu_context *ctx);
213 int (*send_mfc_command)(struct spu_context * ctx,
214 struct mfc_dma_command * cmd);
215 void (*dma_info_read) (struct spu_context * ctx,
216 struct spu_dma_info * info);
217 void (*proxydma_info_read) (struct spu_context * ctx,
218 struct spu_proxydma_info * info);
219 void (*restart_dma)(struct spu_context *ctx);
220};
221
222extern struct spu_context_ops spu_hw_ops;
223extern struct spu_context_ops spu_backing_ops;
224
225struct spufs_inode_info {
226 struct spu_context *i_ctx;
227 struct spu_gang *i_gang;
228 struct inode vfs_inode;
229 int i_openers;
230};
231#define SPUFS_I(inode) \
232 container_of(inode, struct spufs_inode_info, vfs_inode)
233
234struct spufs_tree_descr {
235 const char *name;
236 const struct file_operations *ops;
237 umode_t mode;
238 size_t size;
239};
240
241extern const struct spufs_tree_descr spufs_dir_contents[];
242extern const struct spufs_tree_descr spufs_dir_nosched_contents[];
243extern const struct spufs_tree_descr spufs_dir_debug_contents[];
244
245
246extern struct spufs_calls spufs_calls;
247struct coredump_params;
248long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status);
249long spufs_create(struct path *nd, struct dentry *dentry, unsigned int flags,
250 umode_t mode, struct file *filp);
251
252extern int spufs_coredump_extra_notes_size(void);
253extern int spufs_coredump_extra_notes_write(struct coredump_params *cprm);
254
255extern const struct file_operations spufs_context_fops;
256
257
258struct spu_gang *alloc_spu_gang(void);
259struct spu_gang *get_spu_gang(struct spu_gang *gang);
260int put_spu_gang(struct spu_gang *gang);
261void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
262void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);
263
264
265int spufs_handle_class1(struct spu_context *ctx);
266int spufs_handle_class0(struct spu_context *ctx);
267
268
269struct spu *affinity_check(struct spu_context *ctx);
270
271
272extern atomic_t nr_spu_contexts;
273static inline int __must_check spu_acquire(struct spu_context *ctx)
274{
275 return mutex_lock_interruptible(&ctx->state_mutex);
276}
277
278static inline void spu_release(struct spu_context *ctx)
279{
280 mutex_unlock(&ctx->state_mutex);
281}
282
283struct spu_context * alloc_spu_context(struct spu_gang *gang);
284void destroy_spu_context(struct kref *kref);
285struct spu_context * get_spu_context(struct spu_context *ctx);
286int put_spu_context(struct spu_context *ctx);
287void spu_unmap_mappings(struct spu_context *ctx);
288
289void spu_forget(struct spu_context *ctx);
290int __must_check spu_acquire_saved(struct spu_context *ctx);
291void spu_release_saved(struct spu_context *ctx);
292
293int spu_stopped(struct spu_context *ctx, u32 * stat);
294void spu_del_from_rq(struct spu_context *ctx);
295int spu_activate(struct spu_context *ctx, unsigned long flags);
296void spu_deactivate(struct spu_context *ctx);
297void spu_yield(struct spu_context *ctx);
298void spu_switch_notify(struct spu *spu, struct spu_context *ctx);
299void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
300 u32 type, u32 val);
301void spu_set_timeslice(struct spu_context *ctx);
302void spu_update_sched_info(struct spu_context *ctx);
303void __spu_update_sched_info(struct spu_context *ctx);
304int __init spu_sched_init(void);
305void spu_sched_exit(void);
306
307extern char *isolated_loader;
308
309
310
311
312
313
314
315
316
317
318
319#define spufs_wait(wq, condition) \
320({ \
321 int __ret = 0; \
322 DEFINE_WAIT(__wait); \
323 for (;;) { \
324 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
325 if (condition) \
326 break; \
327 spu_release(ctx); \
328 if (signal_pending(current)) { \
329 __ret = -ERESTARTSYS; \
330 break; \
331 } \
332 schedule(); \
333 __ret = spu_acquire(ctx); \
334 if (__ret) \
335 break; \
336 } \
337 finish_wait(&(wq), &__wait); \
338 __ret; \
339})
340
341size_t spu_wbox_write(struct spu_context *ctx, u32 data);
342size_t spu_ibox_read(struct spu_context *ctx, u32 *data);
343
344
345void spufs_ibox_callback(struct spu *spu);
346void spufs_wbox_callback(struct spu *spu);
347void spufs_stop_callback(struct spu *spu, int irq);
348void spufs_mfc_callback(struct spu *spu);
349void spufs_dma_callback(struct spu *spu, int type);
350
351extern struct spu_coredump_calls spufs_coredump_calls;
352struct spufs_coredump_reader {
353 char *name;
354 ssize_t (*read)(struct spu_context *ctx,
355 char __user *buffer, size_t size, loff_t *pos);
356 u64 (*get)(struct spu_context *ctx);
357 size_t size;
358};
359extern const struct spufs_coredump_reader spufs_coredump_read[];
360extern int spufs_coredump_num_notes;
361
362extern int spu_init_csa(struct spu_state *csa);
363extern void spu_fini_csa(struct spu_state *csa);
364extern int spu_save(struct spu_state *prev, struct spu *spu);
365extern int spu_restore(struct spu_state *new, struct spu *spu);
366extern int spu_switch(struct spu_state *prev, struct spu_state *new,
367 struct spu *spu);
368extern int spu_alloc_lscsa(struct spu_state *csa);
369extern void spu_free_lscsa(struct spu_state *csa);
370
371extern void spuctx_switch_state(struct spu_context *ctx,
372 enum spu_utilization_state new_state);
373
374#endif
375
