~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/cell/spufs/spufs.h

Version: ~ [ linux-5.16-rc3 ] ~ [ linux-5.15.5 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.82 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.162 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.218 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.256 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.291 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.293 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 /*
  3  * SPU file system
  4  *
  5  * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
  6  *
  7  * Author: Arnd Bergmann <arndb@de.ibm.com>
  8  */
  9 #ifndef SPUFS_H
 10 #define SPUFS_H
 11 
 12 #include <linux/kref.h>
 13 #include <linux/mutex.h>
 14 #include <linux/spinlock.h>
 15 #include <linux/fs.h>
 16 #include <linux/cpumask.h>
 17 #include <linux/sched/signal.h>
 18 
 19 #include <asm/spu.h>
 20 #include <asm/spu_csa.h>
 21 #include <asm/spu_info.h>
 22 
 23 #define SPUFS_PS_MAP_SIZE       0x20000
 24 #define SPUFS_MFC_MAP_SIZE      0x1000
 25 #define SPUFS_CNTL_MAP_SIZE     0x1000
 26 #define SPUFS_SIGNAL_MAP_SIZE   PAGE_SIZE
 27 #define SPUFS_MSS_MAP_SIZE      0x1000
 28 
 29 /* The magic number for our file system */
 30 enum {
 31         SPUFS_MAGIC = 0x23c9b64e,
 32 };
 33 
 34 struct spu_context_ops;
 35 struct spu_gang;
 36 
 37 /* ctx->sched_flags */
 38 enum {
 39         SPU_SCHED_NOTIFY_ACTIVE,
 40         SPU_SCHED_WAS_ACTIVE,   /* was active upon spu_acquire_saved()  */
 41         SPU_SCHED_SPU_RUN,      /* context is within spu_run */
 42 };
 43 
 44 enum {
 45         SWITCH_LOG_BUFSIZE = 4096,
 46 };
 47 
 48 enum {
 49         SWITCH_LOG_START,
 50         SWITCH_LOG_STOP,
 51         SWITCH_LOG_EXIT,
 52 };
 53 
 54 struct switch_log {
 55         wait_queue_head_t       wait;
 56         unsigned long           head;
 57         unsigned long           tail;
 58         struct switch_log_entry {
 59                 struct timespec64 tstamp;
 60                 s32             spu_id;
 61                 u32             type;
 62                 u32             val;
 63                 u64             timebase;
 64         } log[];
 65 };
 66 
 67 struct spu_context {
 68         struct spu *spu;                  /* pointer to a physical SPU */
 69         struct spu_state csa;             /* SPU context save area. */
 70         spinlock_t mmio_lock;             /* protects mmio access */
 71         struct address_space *local_store; /* local store mapping.  */
 72         struct address_space *mfc;         /* 'mfc' area mappings. */
 73         struct address_space *cntl;        /* 'control' area mappings. */
 74         struct address_space *signal1;     /* 'signal1' area mappings. */
 75         struct address_space *signal2;     /* 'signal2' area mappings. */
 76         struct address_space *mss;         /* 'mss' area mappings. */
 77         struct address_space *psmap;       /* 'psmap' area mappings. */
 78         struct mutex mapping_lock;
 79         u64 object_id;             /* user space pointer for oprofile */
 80 
 81         enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
 82         struct mutex state_mutex;
 83         struct mutex run_mutex;
 84 
 85         struct mm_struct *owner;
 86 
 87         struct kref kref;
 88         wait_queue_head_t ibox_wq;
 89         wait_queue_head_t wbox_wq;
 90         wait_queue_head_t stop_wq;
 91         wait_queue_head_t mfc_wq;
 92         wait_queue_head_t run_wq;
 93         u32 tagwait;
 94         struct spu_context_ops *ops;
 95         struct work_struct reap_work;
 96         unsigned long flags;
 97         unsigned long event_return;
 98 
 99         struct list_head gang_list;
100         struct spu_gang *gang;
101         struct kref *prof_priv_kref;
102         void ( * prof_priv_release) (struct kref *kref);
103 
104         /* owner thread */
105         pid_t tid;
106 
107         /* scheduler fields */
108         struct list_head rq;
109         unsigned int time_slice;
110         unsigned long sched_flags;
111         cpumask_t cpus_allowed;
112         int policy;
113         int prio;
114         int last_ran;
115 
116         /* statistics */
117         struct {
118                 /* updates protected by ctx->state_mutex */
119                 enum spu_utilization_state util_state;
120                 unsigned long long tstamp;      /* time of last state switch */
121                 unsigned long long times[SPU_UTIL_MAX];
122                 unsigned long long vol_ctx_switch;
123                 unsigned long long invol_ctx_switch;
124                 unsigned long long min_flt;
125                 unsigned long long maj_flt;
126                 unsigned long long hash_flt;
127                 unsigned long long slb_flt;
128                 unsigned long long slb_flt_base; /* # at last ctx switch */
129                 unsigned long long class2_intr;
130                 unsigned long long class2_intr_base; /* # at last ctx switch */
131                 unsigned long long libassist;
132         } stats;
133 
134         /* context switch log */
135         struct switch_log *switch_log;
136 
137         struct list_head aff_list;
138         int aff_head;
139         int aff_offset;
140 };
141 
142 struct spu_gang {
143         struct list_head list;
144         struct mutex mutex;
145         struct kref kref;
146         int contexts;
147 
148         struct spu_context *aff_ref_ctx;
149         struct list_head aff_list_head;
150         struct mutex aff_mutex;
151         int aff_flags;
152         struct spu *aff_ref_spu;
153         atomic_t aff_sched_count;
154 };
155 
156 /* Flag bits for spu_gang aff_flags */
157 #define AFF_OFFSETS_SET         1
158 #define AFF_MERGED              2
159 
160 struct mfc_dma_command {
161         int32_t pad;    /* reserved */
162         uint32_t lsa;   /* local storage address */
163         uint64_t ea;    /* effective address */
164         uint16_t size;  /* transfer size */
165         uint16_t tag;   /* command tag */
166         uint16_t class; /* class ID */
167         uint16_t cmd;   /* command opcode */
168 };
169 
170 
171 /* SPU context query/set operations. */
172 struct spu_context_ops {
173         int (*mbox_read) (struct spu_context * ctx, u32 * data);
174          u32(*mbox_stat_read) (struct spu_context * ctx);
175         __poll_t (*mbox_stat_poll)(struct spu_context *ctx, __poll_t events);
176         int (*ibox_read) (struct spu_context * ctx, u32 * data);
177         int (*wbox_write) (struct spu_context * ctx, u32 data);
178          u32(*signal1_read) (struct spu_context * ctx);
179         void (*signal1_write) (struct spu_context * ctx, u32 data);
180          u32(*signal2_read) (struct spu_context * ctx);
181         void (*signal2_write) (struct spu_context * ctx, u32 data);
182         void (*signal1_type_set) (struct spu_context * ctx, u64 val);
183          u64(*signal1_type_get) (struct spu_context * ctx);
184         void (*signal2_type_set) (struct spu_context * ctx, u64 val);
185          u64(*signal2_type_get) (struct spu_context * ctx);
186          u32(*npc_read) (struct spu_context * ctx);
187         void (*npc_write) (struct spu_context * ctx, u32 data);
188          u32(*status_read) (struct spu_context * ctx);
189         char*(*get_ls) (struct spu_context * ctx);
190         void (*privcntl_write) (struct spu_context *ctx, u64 data);
191          u32 (*runcntl_read) (struct spu_context * ctx);
192         void (*runcntl_write) (struct spu_context * ctx, u32 data);
193         void (*runcntl_stop) (struct spu_context * ctx);
194         void (*master_start) (struct spu_context * ctx);
195         void (*master_stop) (struct spu_context * ctx);
196         int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode);
197         u32 (*read_mfc_tagstatus)(struct spu_context * ctx);
198         u32 (*get_mfc_free_elements)(struct spu_context *ctx);
199         int (*send_mfc_command)(struct spu_context * ctx,
200                                 struct mfc_dma_command * cmd);
201         void (*dma_info_read) (struct spu_context * ctx,
202                                struct spu_dma_info * info);
203         void (*proxydma_info_read) (struct spu_context * ctx,
204                                     struct spu_proxydma_info * info);
205         void (*restart_dma)(struct spu_context *ctx);
206 };
207 
208 extern struct spu_context_ops spu_hw_ops;
209 extern struct spu_context_ops spu_backing_ops;
210 
211 struct spufs_inode_info {
212         struct spu_context *i_ctx;
213         struct spu_gang *i_gang;
214         struct inode vfs_inode;
215         int i_openers;
216 };
217 #define SPUFS_I(inode) \
218         container_of(inode, struct spufs_inode_info, vfs_inode)
219 
220 struct spufs_tree_descr {
221         const char *name;
222         const struct file_operations *ops;
223         umode_t mode;
224         size_t size;
225 };
226 
227 extern const struct spufs_tree_descr spufs_dir_contents[];
228 extern const struct spufs_tree_descr spufs_dir_nosched_contents[];
229 extern const struct spufs_tree_descr spufs_dir_debug_contents[];
230 
231 /* system call implementation */
232 extern struct spufs_calls spufs_calls;
233 struct coredump_params;
234 long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status);
235 long spufs_create(struct path *nd, struct dentry *dentry, unsigned int flags,
236                         umode_t mode, struct file *filp);
237 /* ELF coredump callbacks for writing SPU ELF notes */
238 extern int spufs_coredump_extra_notes_size(void);
239 extern int spufs_coredump_extra_notes_write(struct coredump_params *cprm);
240 
241 extern const struct file_operations spufs_context_fops;
242 
243 /* gang management */
244 struct spu_gang *alloc_spu_gang(void);
245 struct spu_gang *get_spu_gang(struct spu_gang *gang);
246 int put_spu_gang(struct spu_gang *gang);
247 void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
248 void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);
249 
250 /* fault handling */
251 int spufs_handle_class1(struct spu_context *ctx);
252 int spufs_handle_class0(struct spu_context *ctx);
253 
254 /* affinity */
255 struct spu *affinity_check(struct spu_context *ctx);
256 
257 /* context management */
258 extern atomic_t nr_spu_contexts;
259 static inline int __must_check spu_acquire(struct spu_context *ctx)
260 {
261         return mutex_lock_interruptible(&ctx->state_mutex);
262 }
263 
264 static inline void spu_release(struct spu_context *ctx)
265 {
266         mutex_unlock(&ctx->state_mutex);
267 }
268 
269 struct spu_context * alloc_spu_context(struct spu_gang *gang);
270 void destroy_spu_context(struct kref *kref);
271 struct spu_context * get_spu_context(struct spu_context *ctx);
272 int put_spu_context(struct spu_context *ctx);
273 void spu_unmap_mappings(struct spu_context *ctx);
274 
275 void spu_forget(struct spu_context *ctx);
276 int __must_check spu_acquire_saved(struct spu_context *ctx);
277 void spu_release_saved(struct spu_context *ctx);
278 
279 int spu_stopped(struct spu_context *ctx, u32 * stat);
280 void spu_del_from_rq(struct spu_context *ctx);
281 int spu_activate(struct spu_context *ctx, unsigned long flags);
282 void spu_deactivate(struct spu_context *ctx);
283 void spu_yield(struct spu_context *ctx);
284 void spu_switch_notify(struct spu *spu, struct spu_context *ctx);
285 void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
286                 u32 type, u32 val);
287 void spu_set_timeslice(struct spu_context *ctx);
288 void spu_update_sched_info(struct spu_context *ctx);
289 void __spu_update_sched_info(struct spu_context *ctx);
290 int __init spu_sched_init(void);
291 void spu_sched_exit(void);
292 
293 extern char *isolated_loader;
294 
295 /*
296  * spufs_wait
297  *      Same as wait_event_interruptible(), except that here
298  *      we need to call spu_release(ctx) before sleeping, and
299  *      then spu_acquire(ctx) when awoken.
300  *
301  *      Returns with state_mutex re-acquired when successful or
302  *      with -ERESTARTSYS and the state_mutex dropped when interrupted.
303  */
304 
305 #define spufs_wait(wq, condition)                                       \
306 ({                                                                      \
307         int __ret = 0;                                                  \
308         DEFINE_WAIT(__wait);                                            \
309         for (;;) {                                                      \
310                 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE);    \
311                 if (condition)                                          \
312                         break;                                          \
313                 spu_release(ctx);                                       \
314                 if (signal_pending(current)) {                          \
315                         __ret = -ERESTARTSYS;                           \
316                         break;                                          \
317                 }                                                       \
318                 schedule();                                             \
319                 __ret = spu_acquire(ctx);                               \
320                 if (__ret)                                              \
321                         break;                                          \
322         }                                                               \
323         finish_wait(&(wq), &__wait);                                    \
324         __ret;                                                          \
325 })
326 
327 size_t spu_wbox_write(struct spu_context *ctx, u32 data);
328 size_t spu_ibox_read(struct spu_context *ctx, u32 *data);
329 
330 /* irq callback funcs. */
331 void spufs_ibox_callback(struct spu *spu);
332 void spufs_wbox_callback(struct spu *spu);
333 void spufs_stop_callback(struct spu *spu, int irq);
334 void spufs_mfc_callback(struct spu *spu);
335 void spufs_dma_callback(struct spu *spu, int type);
336 
337 extern struct spu_coredump_calls spufs_coredump_calls;
338 struct spufs_coredump_reader {
339         char *name;
340         ssize_t (*dump)(struct spu_context *ctx, struct coredump_params *cprm);
341         u64 (*get)(struct spu_context *ctx);
342         size_t size;
343 };
344 extern const struct spufs_coredump_reader spufs_coredump_read[];
345 extern int spufs_coredump_num_notes;
346 
347 extern int spu_init_csa(struct spu_state *csa);
348 extern void spu_fini_csa(struct spu_state *csa);
349 extern int spu_save(struct spu_state *prev, struct spu *spu);
350 extern int spu_restore(struct spu_state *new, struct spu *spu);
351 extern int spu_switch(struct spu_state *prev, struct spu_state *new,
352                       struct spu *spu);
353 extern int spu_alloc_lscsa(struct spu_state *csa);
354 extern void spu_free_lscsa(struct spu_state *csa);
355 
356 extern void spuctx_switch_state(struct spu_context *ctx,
357                 enum spu_utilization_state new_state);
358 
359 #endif
360 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp