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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 timespec64 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 __poll_t (*mbox_stat_poll)(struct spu_context *ctx, __poll_t events);
189 int (*ibox_read) (struct spu_context * ctx, u32 * data);
190 int (*wbox_write) (struct spu_context * ctx, u32 data);
191 u32(*signal1_read) (struct spu_context * ctx);
192 void (*signal1_write) (struct spu_context * ctx, u32 data);
193 u32(*signal2_read) (struct spu_context * ctx);
194 void (*signal2_write) (struct spu_context * ctx, u32 data);
195 void (*signal1_type_set) (struct spu_context * ctx, u64 val);
196 u64(*signal1_type_get) (struct spu_context * ctx);
197 void (*signal2_type_set) (struct spu_context * ctx, u64 val);
198 u64(*signal2_type_get) (struct spu_context * ctx);
199 u32(*npc_read) (struct spu_context * ctx);
200 void (*npc_write) (struct spu_context * ctx, u32 data);
201 u32(*status_read) (struct spu_context * ctx);
202 char*(*get_ls) (struct spu_context * ctx);
203 void (*privcntl_write) (struct spu_context *ctx, u64 data);
204 u32 (*runcntl_read) (struct spu_context * ctx);
205 void (*runcntl_write) (struct spu_context * ctx, u32 data);
206 void (*runcntl_stop) (struct spu_context * ctx);
207 void (*master_start) (struct spu_context * ctx);
208 void (*master_stop) (struct spu_context * ctx);
209 int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode);
210 u32 (*read_mfc_tagstatus)(struct spu_context * ctx);
211 u32 (*get_mfc_free_elements)(struct spu_context *ctx);
212 int (*send_mfc_command)(struct spu_context * ctx,
213 struct mfc_dma_command * cmd);
214 void (*dma_info_read) (struct spu_context * ctx,
215 struct spu_dma_info * info);
216 void (*proxydma_info_read) (struct spu_context * ctx,
217 struct spu_proxydma_info * info);
218 void (*restart_dma)(struct spu_context *ctx);
219};
220
221extern struct spu_context_ops spu_hw_ops;
222extern struct spu_context_ops spu_backing_ops;
223
224struct spufs_inode_info {
225 struct spu_context *i_ctx;
226 struct spu_gang *i_gang;
227 struct inode vfs_inode;
228 int i_openers;
229};
230#define SPUFS_I(inode) \
231 container_of(inode, struct spufs_inode_info, vfs_inode)
232
233struct spufs_tree_descr {
234 const char *name;
235 const struct file_operations *ops;
236 umode_t mode;
237 size_t size;
238};
239
240extern const struct spufs_tree_descr spufs_dir_contents[];
241extern const struct spufs_tree_descr spufs_dir_nosched_contents[];
242extern const struct spufs_tree_descr spufs_dir_debug_contents[];
243
244
245extern struct spufs_calls spufs_calls;
246struct coredump_params;
247long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status);
248long spufs_create(struct path *nd, struct dentry *dentry, unsigned int flags,
249 umode_t mode, struct file *filp);
250
251extern int spufs_coredump_extra_notes_size(void);
252extern int spufs_coredump_extra_notes_write(struct coredump_params *cprm);
253
254extern const struct file_operations spufs_context_fops;
255
256
257struct spu_gang *alloc_spu_gang(void);
258struct spu_gang *get_spu_gang(struct spu_gang *gang);
259int put_spu_gang(struct spu_gang *gang);
260void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
261void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);
262
263
264int spufs_handle_class1(struct spu_context *ctx);
265int spufs_handle_class0(struct spu_context *ctx);
266
267
268struct spu *affinity_check(struct spu_context *ctx);
269
270
271extern atomic_t nr_spu_contexts;
272static inline int __must_check spu_acquire(struct spu_context *ctx)
273{
274 return mutex_lock_interruptible(&ctx->state_mutex);
275}
276
277static inline void spu_release(struct spu_context *ctx)
278{
279 mutex_unlock(&ctx->state_mutex);
280}
281
282struct spu_context * alloc_spu_context(struct spu_gang *gang);
283void destroy_spu_context(struct kref *kref);
284struct spu_context * get_spu_context(struct spu_context *ctx);
285int put_spu_context(struct spu_context *ctx);
286void spu_unmap_mappings(struct spu_context *ctx);
287
288void spu_forget(struct spu_context *ctx);
289int __must_check spu_acquire_saved(struct spu_context *ctx);
290void spu_release_saved(struct spu_context *ctx);
291
292int spu_stopped(struct spu_context *ctx, u32 * stat);
293void spu_del_from_rq(struct spu_context *ctx);
294int spu_activate(struct spu_context *ctx, unsigned long flags);
295void spu_deactivate(struct spu_context *ctx);
296void spu_yield(struct spu_context *ctx);
297void spu_switch_notify(struct spu *spu, struct spu_context *ctx);
298void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
299 u32 type, u32 val);
300void spu_set_timeslice(struct spu_context *ctx);
301void spu_update_sched_info(struct spu_context *ctx);
302void __spu_update_sched_info(struct spu_context *ctx);
303int __init spu_sched_init(void);
304void spu_sched_exit(void);
305
306extern char *isolated_loader;
307
308
309
310
311
312
313
314
315
316
317
318#define spufs_wait(wq, condition) \
319({ \
320 int __ret = 0; \
321 DEFINE_WAIT(__wait); \
322 for (;;) { \
323 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
324 if (condition) \
325 break; \
326 spu_release(ctx); \
327 if (signal_pending(current)) { \
328 __ret = -ERESTARTSYS; \
329 break; \
330 } \
331 schedule(); \
332 __ret = spu_acquire(ctx); \
333 if (__ret) \
334 break; \
335 } \
336 finish_wait(&(wq), &__wait); \
337 __ret; \
338})
339
340size_t spu_wbox_write(struct spu_context *ctx, u32 data);
341size_t spu_ibox_read(struct spu_context *ctx, u32 *data);
342
343
344void spufs_ibox_callback(struct spu *spu);
345void spufs_wbox_callback(struct spu *spu);
346void spufs_stop_callback(struct spu *spu, int irq);
347void spufs_mfc_callback(struct spu *spu);
348void spufs_dma_callback(struct spu *spu, int type);
349
350extern struct spu_coredump_calls spufs_coredump_calls;
351struct spufs_coredump_reader {
352 char *name;
353 ssize_t (*read)(struct spu_context *ctx,
354 char __user *buffer, size_t size, loff_t *pos);
355 u64 (*get)(struct spu_context *ctx);
356 size_t size;
357};
358extern const struct spufs_coredump_reader spufs_coredump_read[];
359extern int spufs_coredump_num_notes;
360
361extern int spu_init_csa(struct spu_state *csa);
362extern void spu_fini_csa(struct spu_state *csa);
363extern int spu_save(struct spu_state *prev, struct spu *spu);
364extern int spu_restore(struct spu_state *new, struct spu *spu);
365extern int spu_switch(struct spu_state *prev, struct spu_state *new,
366 struct spu *spu);
367extern int spu_alloc_lscsa(struct spu_state *csa);
368extern void spu_free_lscsa(struct spu_state *csa);
369
370extern void spuctx_switch_state(struct spu_context *ctx,
371 enum spu_utilization_state new_state);
372
373#endif
374