[mirror_ubuntu-hirsute-kernel.git] / arch / powerpc / platforms / cell / spufs / spufs.h

/*
 * SPU file system
 *
 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
 *
 * Author: Arnd Bergmann <arndb@de.ibm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#ifndef SPUFS_H
#define SPUFS_H

#include <linux/kref.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/fs.h>
#include <linux/cpumask.h>

#include <asm/spu.h>
#include <asm/spu_csa.h>
#include <asm/spu_info.h>

/* The magic number for our file system */
enum {
	SPUFS_MAGIC = 0x23c9b64e,
};

struct spu_context_ops;
struct spu_gang;

enum {
	SPU_SCHED_WAS_ACTIVE,	/* was active upon spu_acquire_saved()  */
};

struct spu_context {
	struct spu *spu;		  /* pointer to a physical SPU */
	struct spu_state csa;		  /* SPU context save area. */
	spinlock_t mmio_lock;		  /* protects mmio access */
	struct address_space *local_store; /* local store mapping.  */
	struct address_space *mfc;	   /* 'mfc' area mappings. */
	struct address_space *cntl;	   /* 'control' area mappings. */
	struct address_space *signal1;	   /* 'signal1' area mappings. */
	struct address_space *signal2;	   /* 'signal2' area mappings. */
	struct address_space *mss;	   /* 'mss' area mappings. */
	struct address_space *psmap;	   /* 'psmap' area mappings. */
	struct mutex mapping_lock;
	u64 object_id;		   /* user space pointer for oprofile */

	enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
	struct mutex state_mutex;
	struct mutex run_mutex;

	struct mm_struct *owner;

	struct kref kref;
	wait_queue_head_t ibox_wq;
	wait_queue_head_t wbox_wq;
	wait_queue_head_t stop_wq;
	wait_queue_head_t mfc_wq;
	struct fasync_struct *ibox_fasync;
	struct fasync_struct *wbox_fasync;
	struct fasync_struct *mfc_fasync;
	u32 tagwait;
	struct spu_context_ops *ops;
	struct work_struct reap_work;
	unsigned long flags;
	unsigned long event_return;

	struct list_head gang_list;
	struct spu_gang *gang;

	/* owner thread */
	pid_t tid;

	/* scheduler fields */
	struct list_head rq;
	unsigned int time_slice;
	unsigned long sched_flags;
	cpumask_t cpus_allowed;
	int policy;
	int prio;

	/* statistics */
	struct {
		/* updates protected by ctx->state_mutex */
		enum spu_utilization_state util_state;
		unsigned long long tstamp;	/* time of last state switch */
		unsigned long long times[SPU_UTIL_MAX];
		unsigned long long vol_ctx_switch;
		unsigned long long invol_ctx_switch;
		unsigned long long min_flt;
		unsigned long long maj_flt;
		unsigned long long hash_flt;
		unsigned long long slb_flt;
		unsigned long long slb_flt_base; /* # at last ctx switch */
		unsigned long long class2_intr;
		unsigned long long class2_intr_base; /* # at last ctx switch */
		unsigned long long libassist;
	} stats;
};

struct spu_gang {
	struct list_head list;
	struct mutex mutex;
	struct kref kref;
	int contexts;
};

struct mfc_dma_command {
	int32_t pad;	/* reserved */
	uint32_t lsa;	/* local storage address */
	uint64_t ea;	/* effective address */
	uint16_t size;	/* transfer size */
	uint16_t tag;	/* command tag */
	uint16_t class;	/* class ID */
	uint16_t cmd;	/* command opcode */
};


/* SPU context query/set operations. */
struct spu_context_ops {
	int (*mbox_read) (struct spu_context * ctx, u32 * data);
	 u32(*mbox_stat_read) (struct spu_context * ctx);
	unsigned int (*mbox_stat_poll)(struct spu_context *ctx,
					unsigned int events);
	int (*ibox_read) (struct spu_context * ctx, u32 * data);
	int (*wbox_write) (struct spu_context * ctx, u32 data);
	 u32(*signal1_read) (struct spu_context * ctx);
	void (*signal1_write) (struct spu_context * ctx, u32 data);
	 u32(*signal2_read) (struct spu_context * ctx);
	void (*signal2_write) (struct spu_context * ctx, u32 data);
	void (*signal1_type_set) (struct spu_context * ctx, u64 val);
	 u64(*signal1_type_get) (struct spu_context * ctx);
	void (*signal2_type_set) (struct spu_context * ctx, u64 val);
	 u64(*signal2_type_get) (struct spu_context * ctx);
	 u32(*npc_read) (struct spu_context * ctx);
	void (*npc_write) (struct spu_context * ctx, u32 data);
	 u32(*status_read) (struct spu_context * ctx);
	char*(*get_ls) (struct spu_context * ctx);
	 u32 (*runcntl_read) (struct spu_context * ctx);
	void (*runcntl_write) (struct spu_context * ctx, u32 data);
	void (*master_start) (struct spu_context * ctx);
	void (*master_stop) (struct spu_context * ctx);
	int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode);
	u32 (*read_mfc_tagstatus)(struct spu_context * ctx);
	u32 (*get_mfc_free_elements)(struct spu_context *ctx);
	int (*send_mfc_command)(struct spu_context * ctx,
				struct mfc_dma_command * cmd);
	void (*dma_info_read) (struct spu_context * ctx,
			       struct spu_dma_info * info);
	void (*proxydma_info_read) (struct spu_context * ctx,
				    struct spu_proxydma_info * info);
	void (*restart_dma)(struct spu_context *ctx);
};

extern struct spu_context_ops spu_hw_ops;
extern struct spu_context_ops spu_backing_ops;

struct spufs_inode_info {
	struct spu_context *i_ctx;
	struct spu_gang *i_gang;
	struct inode vfs_inode;
	int i_openers;
};
#define SPUFS_I(inode) \
	container_of(inode, struct spufs_inode_info, vfs_inode)

extern struct tree_descr spufs_dir_contents[];
extern struct tree_descr spufs_dir_nosched_contents[];

/* system call implementation */
long spufs_run_spu(struct file *file,
		   struct spu_context *ctx, u32 *npc, u32 *status);
long spufs_create(struct nameidata *nd,
			 unsigned int flags, mode_t mode);
extern const struct file_operations spufs_context_fops;

/* gang management */
struct spu_gang *alloc_spu_gang(void);
struct spu_gang *get_spu_gang(struct spu_gang *gang);
int put_spu_gang(struct spu_gang *gang);
void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);

/* fault handling */
int spufs_handle_class1(struct spu_context *ctx);

/* context management */
extern atomic_t nr_spu_contexts;
static inline void spu_acquire(struct spu_context *ctx)
{
	mutex_lock(&ctx->state_mutex);
}

static inline void spu_release(struct spu_context *ctx)
{
	mutex_unlock(&ctx->state_mutex);
}

struct spu_context * alloc_spu_context(struct spu_gang *gang);
void destroy_spu_context(struct kref *kref);
struct spu_context * get_spu_context(struct spu_context *ctx);
int put_spu_context(struct spu_context *ctx);
void spu_unmap_mappings(struct spu_context *ctx);

void spu_forget(struct spu_context *ctx);
int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags);
void spu_acquire_saved(struct spu_context *ctx);
void spu_release_saved(struct spu_context *ctx);

int spu_activate(struct spu_context *ctx, unsigned long flags);
void spu_deactivate(struct spu_context *ctx);
void spu_yield(struct spu_context *ctx);
void spu_set_timeslice(struct spu_context *ctx);
void spu_update_sched_info(struct spu_context *ctx);
void __spu_update_sched_info(struct spu_context *ctx);
int __init spu_sched_init(void);
void spu_sched_exit(void);

extern char *isolated_loader;

/*
 * spufs_wait
 *	Same as wait_event_interruptible(), except that here
 *	we need to call spu_release(ctx) before sleeping, and
 *	then spu_acquire(ctx) when awoken.
 */

#define spufs_wait(wq, condition)					\
({									\
	int __ret = 0;							\
	DEFINE_WAIT(__wait);						\
	for (;;) {							\
		prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE);	\
		if (condition)						\
			break;						\
		if (signal_pending(current)) {				\
			__ret = -ERESTARTSYS;				\
			break;						\
		}							\
		spu_release(ctx);					\
		schedule();						\
		spu_acquire(ctx);					\
	}								\
	finish_wait(&(wq), &__wait);					\
	__ret;								\
})

size_t spu_wbox_write(struct spu_context *ctx, u32 data);
size_t spu_ibox_read(struct spu_context *ctx, u32 *data);

/* irq callback funcs. */
void spufs_ibox_callback(struct spu *spu);
void spufs_wbox_callback(struct spu *spu);
void spufs_stop_callback(struct spu *spu);
void spufs_mfc_callback(struct spu *spu);
void spufs_dma_callback(struct spu *spu, int type);

extern struct spu_coredump_calls spufs_coredump_calls;
struct spufs_coredump_reader {
	char *name;
	ssize_t (*read)(struct spu_context *ctx,
			char __user *buffer, size_t size, loff_t *pos);
	u64 (*get)(void *data);
	size_t size;
};
extern struct spufs_coredump_reader spufs_coredump_read[];
extern int spufs_coredump_num_notes;

/*
 * This function is a little bit too large for an inline, but
 * as fault.c is built into the kernel we can't move it out of
 * line.
 */
static inline void spuctx_switch_state(struct spu_context *ctx,
		enum spu_utilization_state new_state)
{
	unsigned long long curtime;
	signed long long delta;
	struct timespec ts;
	struct spu *spu;
	enum spu_utilization_state old_state;

	ktime_get_ts(&ts);
	curtime = timespec_to_ns(&ts);
	delta = curtime - ctx->stats.tstamp;

	WARN_ON(!mutex_is_locked(&ctx->state_mutex));
	WARN_ON(delta < 0);

	spu = ctx->spu;
	old_state = ctx->stats.util_state;
	ctx->stats.util_state = new_state;
	ctx->stats.tstamp = curtime;

	/*
	 * Update the physical SPU utilization statistics.
	 */
	if (spu) {
		ctx->stats.times[old_state] += delta;
		spu->stats.times[old_state] += delta;
		spu->stats.util_state = new_state;
		spu->stats.tstamp = curtime;
	}
}

#endif
Commit	Line	Data
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>
67207b96 AB	28	#include <linux/fs.h>
ea1ae594	29	#include <linux/cpumask.h>
67207b96 AB	30
67207b96 AB	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;
6263203e AB	42
27b1ea09 CH	43	enum {
	44	SPU_SCHED_WAS_ACTIVE, /* was active upon spu_acquire_saved() */
	45	};
	46
67207b96 AB	47	struct spu_context {
67207b96 AB	48	struct spu spu; / pointer to a physical SPU */
5473af04	49	struct spu_state csa; /* SPU context save area. */
67207b96	50	spinlock_t mmio_lock; /* protects mmio access */
6df10a82 MN	51	struct address_space local_store; / local store mapping. */
6df10a82 MN	52	struct address_space mfc; / 'mfc' area mappings. */
43c2bbd9 CH	53	struct address_space cntl; / 'control' area mappings. */
	54	struct address_space signal1; / 'signal1' area mappings. */
	55	struct address_space signal2; / 'signal2' area mappings. */
	56	struct address_space mss; / 'mss' area mappings. */
	57	struct address_space psmap; / 'psmap' area mappings. */
47d3a5fa	58	struct mutex mapping_lock;
86767277	59	u64 object_id; /* user space pointer for oprofile */
8b3d6663 AB	60
8b3d6663 AB	61	enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
650f8b02	62	struct mutex state_mutex;
e45d48a3	63	struct mutex run_mutex;
8b3d6663 AB	64
8b3d6663 AB	65	struct mm_struct *owner;
67207b96 AB	66
67207b96 AB	67	struct kref kref;
8b3d6663 AB	68	wait_queue_head_t ibox_wq;
8b3d6663 AB	69	wait_queue_head_t wbox_wq;
5110459f	70	wait_queue_head_t stop_wq;
a33a7d73	71	wait_queue_head_t mfc_wq;
8b3d6663 AB	72	struct fasync_struct *ibox_fasync;
8b3d6663 AB	73	struct fasync_struct *wbox_fasync;
a33a7d73 AB	74	struct fasync_struct *mfc_fasync;
a33a7d73 AB	75	u32 tagwait;
8b3d6663	76	struct spu_context_ops *ops;
2a911f0b	77	struct work_struct reap_work;
9add11da AB	78	unsigned long flags;
9add11da AB	79	unsigned long event_return;
6263203e AB	80
	81	struct list_head gang_list;
	82	struct spu_gang *gang;
8389998a	83
476273ad CH	84	/* owner thread */
	85	pid_t tid;
	86
8389998a	87	/* scheduler fields */
7022543e	88	struct list_head rq;
37901802	89	unsigned int time_slice;
26bec673	90	unsigned long sched_flags;
ea1ae594	91	cpumask_t cpus_allowed;
2eb1b120	92	int policy;
8389998a	93	int prio;
e9f8a0b6 CH	94
	95	/* statistics */
	96	struct {
	97	/* updates protected by ctx->state_mutex */
27ec41d3 AD	98	enum spu_utilization_state util_state;
	99	unsigned long long tstamp; /* time of last state switch */
	100	unsigned long long times[SPU_UTIL_MAX];
e9f8a0b6 CH	101	unsigned long long vol_ctx_switch;
	102	unsigned long long invol_ctx_switch;
	103	unsigned long long min_flt;
	104	unsigned long long maj_flt;
	105	unsigned long long hash_flt;
	106	unsigned long long slb_flt;
	107	unsigned long long slb_flt_base; /* # at last ctx switch */
	108	unsigned long long class2_intr;
	109	unsigned long long class2_intr_base; /* # at last ctx switch */
	110	unsigned long long libassist;
	111	} stats;
6263203e AB	112	};
	113
	114	struct spu_gang {
	115	struct list_head list;
	116	struct mutex mutex;
	117	struct kref kref;
	118	int contexts;
8b3d6663 AB	119	};
8b3d6663 AB	120
a33a7d73 AB	121	struct mfc_dma_command {
	122	int32_t pad; /* reserved */
	123	uint32_t lsa; /* local storage address */
	124	uint64_t ea; /* effective address */
	125	uint16_t size; /* transfer size */
	126	uint16_t tag; /* command tag */
	127	uint16_t class; /* class ID */
	128	uint16_t cmd; /* command opcode */
	129	};
	130
	131
8b3d6663 AB	132	/* SPU context query/set operations. */
	133	struct spu_context_ops {
	134	int (mbox_read) (struct spu_context ctx, u32 * data);
	135	u32(mbox_stat_read) (struct spu_context ctx);
3a843d7c AB	136	unsigned int (mbox_stat_poll)(struct spu_context ctx,
3a843d7c AB	137	unsigned int events);
8b3d6663 AB	138	int (ibox_read) (struct spu_context ctx, u32 * data);
	139	int (wbox_write) (struct spu_context ctx, u32 data);
	140	u32(signal1_read) (struct spu_context ctx);
	141	void (signal1_write) (struct spu_context ctx, u32 data);
	142	u32(signal2_read) (struct spu_context ctx);
	143	void (signal2_write) (struct spu_context ctx, u32 data);
	144	void (signal1_type_set) (struct spu_context ctx, u64 val);
	145	u64(signal1_type_get) (struct spu_context ctx);
	146	void (signal2_type_set) (struct spu_context ctx, u64 val);
	147	u64(signal2_type_get) (struct spu_context ctx);
	148	u32(npc_read) (struct spu_context ctx);
	149	void (npc_write) (struct spu_context ctx, u32 data);
	150	u32(status_read) (struct spu_context ctx);
	151	char(get_ls) (struct spu_context * ctx);
3960c260	152	u32 (runcntl_read) (struct spu_context ctx);
5110459f	153	void (runcntl_write) (struct spu_context ctx, u32 data);
ee2d7340 AB	154	void (master_start) (struct spu_context ctx);
ee2d7340 AB	155	void (master_stop) (struct spu_context ctx);
a33a7d73 AB	156	int (set_mfc_query)(struct spu_context ctx, u32 mask, u32 mode);
	157	u32 (read_mfc_tagstatus)(struct spu_context ctx);
	158	u32 (get_mfc_free_elements)(struct spu_context ctx);
b9e3bd77 DGM	159	int (send_mfc_command)(struct spu_context ctx,
	160	struct mfc_dma_command * cmd);
	161	void (dma_info_read) (struct spu_context ctx,
	162	struct spu_dma_info * info);
	163	void (proxydma_info_read) (struct spu_context ctx,
	164	struct spu_proxydma_info * info);
57dace23	165	void (restart_dma)(struct spu_context ctx);
67207b96 AB	166	};
67207b96 AB	167
8b3d6663 AB	168	extern struct spu_context_ops spu_hw_ops;
	169	extern struct spu_context_ops spu_backing_ops;
	170
67207b96 AB	171	struct spufs_inode_info {
67207b96 AB	172	struct spu_context *i_ctx;
6263203e	173	struct spu_gang *i_gang;
67207b96	174	struct inode vfs_inode;
43c2bbd9	175	int i_openers;
67207b96 AB	176	};
	177	#define SPUFS_I(inode) \
	178	container_of(inode, struct spufs_inode_info, vfs_inode)
	179
	180	extern struct tree_descr spufs_dir_contents[];
5737edd1	181	extern struct tree_descr spufs_dir_nosched_contents[];
67207b96 AB	182
	183	/* system call implementation */
	184	long spufs_run_spu(struct file *file,
	185	struct spu_context ctx, u32 npc, u32 *status);
6263203e	186	long spufs_create(struct nameidata *nd,
67207b96	187	unsigned int flags, mode_t mode);
9c2e08c5	188	extern const struct file_operations spufs_context_fops;
67207b96	189
6263203e AB	190	/* gang management */
	191	struct spu_gang *alloc_spu_gang(void);
	192	struct spu_gang get_spu_gang(struct spu_gang gang);
	193	int put_spu_gang(struct spu_gang *gang);
	194	void spu_gang_remove_ctx(struct spu_gang gang, struct spu_context ctx);
	195	void spu_gang_add_ctx(struct spu_gang gang, struct spu_context ctx);
	196
57dace23 AB	197	/* fault handling */
	198	int spufs_handle_class1(struct spu_context *ctx);
	199
67207b96	200	/* context management */
65de66f0	201	extern atomic_t nr_spu_contexts;
6a0641e5 CH	202	static inline void spu_acquire(struct spu_context *ctx)
	203	{
	204	mutex_lock(&ctx->state_mutex);
	205	}
	206
	207	static inline void spu_release(struct spu_context *ctx)
	208	{
	209	mutex_unlock(&ctx->state_mutex);
	210	}
	211
6263203e	212	struct spu_context * alloc_spu_context(struct spu_gang *gang);
67207b96 AB	213	void destroy_spu_context(struct kref *kref);
	214	struct spu_context * get_spu_context(struct spu_context *ctx);
	215	int put_spu_context(struct spu_context *ctx);
5110459f	216	void spu_unmap_mappings(struct spu_context *ctx);
67207b96	217
8b3d6663	218	void spu_forget(struct spu_context *ctx);
26bec673	219	int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags);
67207b96	220	void spu_acquire_saved(struct spu_context *ctx);
27b1ea09	221	void spu_release_saved(struct spu_context *ctx);
50b520d4	222
26bec673	223	int spu_activate(struct spu_context *ctx, unsigned long flags);
8b3d6663 AB	224	void spu_deactivate(struct spu_context *ctx);
8b3d6663 AB	225	void spu_yield(struct spu_context *ctx);
fe443ef2	226	void spu_set_timeslice(struct spu_context *ctx);
2cf2b3b4 CH	227	void spu_update_sched_info(struct spu_context *ctx);
2cf2b3b4 CH	228	void __spu_update_sched_info(struct spu_context *ctx);
8b3d6663	229	int __init spu_sched_init(void);
d1450317	230	void spu_sched_exit(void);
8b3d6663	231
c6730ed4 JK	232	extern char *isolated_loader;
c6730ed4 JK	233
ce8ab854 AB	234	/*
ce8ab854 AB	235	* spufs_wait
7022543e	236	* Same as wait_event_interruptible(), except that here
ce8ab854 AB	237	* we need to call spu_release(ctx) before sleeping, and
	238	* then spu_acquire(ctx) when awoken.
	239	*/
	240
	241	#define spufs_wait(wq, condition) \
	242	({ \
	243	int __ret = 0; \
	244	DEFINE_WAIT(__wait); \
	245	for (;;) { \
	246	prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
	247	if (condition) \
	248	break; \
d3764397 JK	249	if (signal_pending(current)) { \
	250	__ret = -ERESTARTSYS; \
	251	break; \
ce8ab854	252	} \
d3764397 JK	253	spu_release(ctx); \
	254	schedule(); \
	255	spu_acquire(ctx); \
ce8ab854 AB	256	} \
	257	finish_wait(&(wq), &__wait); \
	258	__ret; \
	259	})
	260
8b3d6663 AB	261	size_t spu_wbox_write(struct spu_context *ctx, u32 data);
	262	size_t spu_ibox_read(struct spu_context ctx, u32 data);
	263
	264	/* irq callback funcs. */
	265	void spufs_ibox_callback(struct spu *spu);
	266	void spufs_wbox_callback(struct spu *spu);
5110459f	267	void spufs_stop_callback(struct spu *spu);
a33a7d73	268	void spufs_mfc_callback(struct spu *spu);
9add11da	269	void spufs_dma_callback(struct spu *spu, int type);
8b3d6663	270
bf1ab978 DGM	271	extern struct spu_coredump_calls spufs_coredump_calls;
	272	struct spufs_coredump_reader {
	273	char *name;
	274	ssize_t (read)(struct spu_context ctx,
	275	char __user buffer, size_t size, loff_t pos);
	276	u64 (get)(void data);
	277	size_t size;
	278	};
	279	extern struct spufs_coredump_reader spufs_coredump_read[];
	280	extern int spufs_coredump_num_notes;
	281
e9f8a0b6 CH	282	/*
	283	* This function is a little bit too large for an inline, but
	284	* as fault.c is built into the kernel we can't move it out of
	285	* line.
	286	*/
	287	static inline void spuctx_switch_state(struct spu_context *ctx,
27ec41d3	288	enum spu_utilization_state new_state)
e9f8a0b6	289	{
27ec41d3 AD	290	unsigned long long curtime;
	291	signed long long delta;
	292	struct timespec ts;
	293	struct spu *spu;
	294	enum spu_utilization_state old_state;
e9f8a0b6	295
27ec41d3 AD	296	ktime_get_ts(&ts);
	297	curtime = timespec_to_ns(&ts);
	298	delta = curtime - ctx->stats.tstamp;
e9f8a0b6	299
27ec41d3 AD	300	WARN_ON(!mutex_is_locked(&ctx->state_mutex));
	301	WARN_ON(delta < 0);
	302
	303	spu = ctx->spu;
	304	old_state = ctx->stats.util_state;
	305	ctx->stats.util_state = new_state;
	306	ctx->stats.tstamp = curtime;
	307
	308	/*
	309	* Update the physical SPU utilization statistics.
	310	*/
	311	if (spu) {
	312	ctx->stats.times[old_state] += delta;
	313	spu->stats.times[old_state] += delta;
	314	spu->stats.util_state = new_state;
fe2f896d	315	spu->stats.tstamp = curtime;
fe2f896d CH	316	}
	317	}
	318
67207b96	319	#endif