[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;

/* ctx->sched_flags */
enum {
	SPU_SCHED_NOTIFY_ACTIVE,
	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;
	struct kref *prof_priv_kref;
	void ( * prof_priv_release) (struct kref *kref);

	/* 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 list_head aff_list;
	int aff_head;
	int aff_offset;
};

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

	struct spu_context *aff_ref_ctx;
	struct list_head aff_list_head;
	struct mutex aff_mutex;
	int aff_flags;
	struct spu *aff_ref_spu;
	atomic_t aff_sched_count;
};

/* Flag bits for spu_gang aff_flags */
#define AFF_OFFSETS_SET		1
#define AFF_MERGED		2

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 */
extern struct spufs_calls spufs_calls;
long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status);
long spufs_create(struct nameidata *nd, unsigned int flags,
			mode_t mode, struct file *filp);
/* ELF coredump callbacks for writing SPU ELF notes */
extern int spufs_coredump_extra_notes_size(void);
extern int spufs_coredump_extra_notes_write(struct file *file, loff_t *foffset);

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);

/* affinity */
struct spu *affinity_check(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_switch_notify(struct spu *spu, 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)(struct spu_context *ctx);
	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
36aaccc1 BN	43	/* ctx->sched_flags */
	44	enum {
	45	SPU_SCHED_NOTIFY_ACTIVE,
b2c863bd	46	SPU_SCHED_WAS_ACTIVE, /* was active upon spu_acquire_saved() */
36aaccc1 BN	47	};
36aaccc1 BN	48
67207b96 AB	49	struct spu_context {
67207b96 AB	50	struct spu spu; / pointer to a physical SPU */
5473af04	51	struct spu_state csa; /* SPU context save area. */
67207b96	52	spinlock_t mmio_lock; /* protects mmio access */
6df10a82 MN	53	struct address_space local_store; / local store mapping. */
6df10a82 MN	54	struct address_space mfc; / 'mfc' area mappings. */
43c2bbd9 CH	55	struct address_space cntl; / 'control' area mappings. */
	56	struct address_space signal1; / 'signal1' area mappings. */
	57	struct address_space signal2; / 'signal2' area mappings. */
	58	struct address_space mss; / 'mss' area mappings. */
	59	struct address_space psmap; / 'psmap' area mappings. */
47d3a5fa	60	struct mutex mapping_lock;
86767277	61	u64 object_id; /* user space pointer for oprofile */
8b3d6663 AB	62
8b3d6663 AB	63	enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
650f8b02	64	struct mutex state_mutex;
e45d48a3	65	struct mutex run_mutex;
8b3d6663 AB	66
8b3d6663 AB	67	struct mm_struct *owner;
67207b96 AB	68
67207b96 AB	69	struct kref kref;
8b3d6663 AB	70	wait_queue_head_t ibox_wq;
8b3d6663 AB	71	wait_queue_head_t wbox_wq;
5110459f	72	wait_queue_head_t stop_wq;
a33a7d73	73	wait_queue_head_t mfc_wq;
8b3d6663 AB	74	struct fasync_struct *ibox_fasync;
8b3d6663 AB	75	struct fasync_struct *wbox_fasync;
a33a7d73 AB	76	struct fasync_struct *mfc_fasync;
a33a7d73 AB	77	u32 tagwait;
8b3d6663	78	struct spu_context_ops *ops;
2a911f0b	79	struct work_struct reap_work;
9add11da AB	80	unsigned long flags;
9add11da AB	81	unsigned long event_return;
6263203e AB	82
	83	struct list_head gang_list;
	84	struct spu_gang *gang;
1474855d BN	85	struct kref *prof_priv_kref;
1474855d BN	86	void ( * prof_priv_release) (struct kref *kref);
8389998a	87
476273ad CH	88	/* owner thread */
	89	pid_t tid;
	90
8389998a	91	/* scheduler fields */
7022543e	92	struct list_head rq;
37901802	93	unsigned int time_slice;
26bec673	94	unsigned long sched_flags;
ea1ae594	95	cpumask_t cpus_allowed;
2eb1b120	96	int policy;
8389998a	97	int prio;
e9f8a0b6 CH	98
	99	/* statistics */
	100	struct {
	101	/* updates protected by ctx->state_mutex */
27ec41d3 AD	102	enum spu_utilization_state util_state;
	103	unsigned long long tstamp; /* time of last state switch */
	104	unsigned long long times[SPU_UTIL_MAX];
e9f8a0b6 CH	105	unsigned long long vol_ctx_switch;
	106	unsigned long long invol_ctx_switch;
	107	unsigned long long min_flt;
	108	unsigned long long maj_flt;
	109	unsigned long long hash_flt;
	110	unsigned long long slb_flt;
	111	unsigned long long slb_flt_base; /* # at last ctx switch */
	112	unsigned long long class2_intr;
	113	unsigned long long class2_intr_base; /* # at last ctx switch */
	114	unsigned long long libassist;
	115	} stats;
8e68e2f2 AB	116
	117	struct list_head aff_list;
	118	int aff_head;
c5fc8d2a	119	int aff_offset;
6263203e AB	120	};
	121
	122	struct spu_gang {
	123	struct list_head list;
	124	struct mutex mutex;
	125	struct kref kref;
	126	int contexts;
8e68e2f2 AB	127
	128	struct spu_context *aff_ref_ctx;
	129	struct list_head aff_list_head;
	130	struct mutex aff_mutex;
	131	int aff_flags;
c5fc8d2a AB	132	struct spu *aff_ref_spu;
c5fc8d2a AB	133	atomic_t aff_sched_count;
8b3d6663 AB	134	};
8b3d6663 AB	135
8e68e2f2 AB	136	/* Flag bits for spu_gang aff_flags */
	137	#define AFF_OFFSETS_SET 1
	138	#define AFF_MERGED 2
	139
a33a7d73 AB	140	struct mfc_dma_command {
	141	int32_t pad; /* reserved */
	142	uint32_t lsa; /* local storage address */
	143	uint64_t ea; /* effective address */
	144	uint16_t size; /* transfer size */
	145	uint16_t tag; /* command tag */
	146	uint16_t class; /* class ID */
	147	uint16_t cmd; /* command opcode */
	148	};
	149
	150
8b3d6663 AB	151	/* SPU context query/set operations. */
	152	struct spu_context_ops {
	153	int (mbox_read) (struct spu_context ctx, u32 * data);
	154	u32(mbox_stat_read) (struct spu_context ctx);
3a843d7c AB	155	unsigned int (mbox_stat_poll)(struct spu_context ctx,
3a843d7c AB	156	unsigned int events);
8b3d6663 AB	157	int (ibox_read) (struct spu_context ctx, u32 * data);
	158	int (wbox_write) (struct spu_context ctx, u32 data);
	159	u32(signal1_read) (struct spu_context ctx);
	160	void (signal1_write) (struct spu_context ctx, u32 data);
	161	u32(signal2_read) (struct spu_context ctx);
	162	void (signal2_write) (struct spu_context ctx, u32 data);
	163	void (signal1_type_set) (struct spu_context ctx, u64 val);
	164	u64(signal1_type_get) (struct spu_context ctx);
	165	void (signal2_type_set) (struct spu_context ctx, u64 val);
	166	u64(signal2_type_get) (struct spu_context ctx);
	167	u32(npc_read) (struct spu_context ctx);
	168	void (npc_write) (struct spu_context ctx, u32 data);
	169	u32(status_read) (struct spu_context ctx);
	170	char(get_ls) (struct spu_context * ctx);
3960c260	171	u32 (runcntl_read) (struct spu_context ctx);
5110459f	172	void (runcntl_write) (struct spu_context ctx, u32 data);
ee2d7340 AB	173	void (master_start) (struct spu_context ctx);
ee2d7340 AB	174	void (master_stop) (struct spu_context ctx);
a33a7d73 AB	175	int (set_mfc_query)(struct spu_context ctx, u32 mask, u32 mode);
	176	u32 (read_mfc_tagstatus)(struct spu_context ctx);
	177	u32 (get_mfc_free_elements)(struct spu_context ctx);
b9e3bd77 DGM	178	int (send_mfc_command)(struct spu_context ctx,
	179	struct mfc_dma_command * cmd);
	180	void (dma_info_read) (struct spu_context ctx,
	181	struct spu_dma_info * info);
	182	void (proxydma_info_read) (struct spu_context ctx,
	183	struct spu_proxydma_info * info);
57dace23	184	void (restart_dma)(struct spu_context ctx);
67207b96 AB	185	};
67207b96 AB	186
8b3d6663 AB	187	extern struct spu_context_ops spu_hw_ops;
	188	extern struct spu_context_ops spu_backing_ops;
	189
67207b96 AB	190	struct spufs_inode_info {
67207b96 AB	191	struct spu_context *i_ctx;
6263203e	192	struct spu_gang *i_gang;
67207b96	193	struct inode vfs_inode;
43c2bbd9	194	int i_openers;
67207b96 AB	195	};
	196	#define SPUFS_I(inode) \
	197	container_of(inode, struct spufs_inode_info, vfs_inode)
	198
	199	extern struct tree_descr spufs_dir_contents[];
5737edd1	200	extern struct tree_descr spufs_dir_nosched_contents[];
67207b96 AB	201
67207b96 AB	202	/* system call implementation */
98f06978	203	extern struct spufs_calls spufs_calls;
50af32a9	204	long spufs_run_spu(struct spu_context ctx, u32 npc, u32 *status);
8e68e2f2 AB	205	long spufs_create(struct nameidata *nd, unsigned int flags,
8e68e2f2 AB	206	mode_t mode, struct file *filp);
48cad41f ME	207	/* ELF coredump callbacks for writing SPU ELF notes */
48cad41f ME	208	extern int spufs_coredump_extra_notes_size(void);
7af1443a	209	extern int spufs_coredump_extra_notes_write(struct file file, loff_t foffset);
48cad41f	210
9c2e08c5	211	extern const struct file_operations spufs_context_fops;
67207b96	212
6263203e AB	213	/* gang management */
	214	struct spu_gang *alloc_spu_gang(void);
	215	struct spu_gang get_spu_gang(struct spu_gang gang);
	216	int put_spu_gang(struct spu_gang *gang);
	217	void spu_gang_remove_ctx(struct spu_gang gang, struct spu_context ctx);
	218	void spu_gang_add_ctx(struct spu_gang gang, struct spu_context ctx);
	219
57dace23 AB	220	/* fault handling */
	221	int spufs_handle_class1(struct spu_context *ctx);
	222
c5fc8d2a AB	223	/* affinity */
	224	struct spu affinity_check(struct spu_context ctx);
	225
67207b96	226	/* context management */
65de66f0	227	extern atomic_t nr_spu_contexts;
6a0641e5 CH	228	static inline void spu_acquire(struct spu_context *ctx)
	229	{
	230	mutex_lock(&ctx->state_mutex);
	231	}
	232
	233	static inline void spu_release(struct spu_context *ctx)
	234	{
	235	mutex_unlock(&ctx->state_mutex);
	236	}
	237
6263203e	238	struct spu_context * alloc_spu_context(struct spu_gang *gang);
67207b96 AB	239	void destroy_spu_context(struct kref *kref);
	240	struct spu_context * get_spu_context(struct spu_context *ctx);
	241	int put_spu_context(struct spu_context *ctx);
5110459f	242	void spu_unmap_mappings(struct spu_context *ctx);
67207b96	243
8b3d6663	244	void spu_forget(struct spu_context *ctx);
26bec673	245	int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags);
67207b96	246	void spu_acquire_saved(struct spu_context *ctx);
27b1ea09	247	void spu_release_saved(struct spu_context *ctx);
50b520d4	248
26bec673	249	int spu_activate(struct spu_context *ctx, unsigned long flags);
8b3d6663 AB	250	void spu_deactivate(struct spu_context *ctx);
8b3d6663 AB	251	void spu_yield(struct spu_context *ctx);
36aaccc1	252	void spu_switch_notify(struct spu spu, struct spu_context ctx);
fe443ef2	253	void spu_set_timeslice(struct spu_context *ctx);
2cf2b3b4 CH	254	void spu_update_sched_info(struct spu_context *ctx);
2cf2b3b4 CH	255	void __spu_update_sched_info(struct spu_context *ctx);
8b3d6663	256	int __init spu_sched_init(void);
d1450317	257	void spu_sched_exit(void);
8b3d6663	258
c6730ed4 JK	259	extern char *isolated_loader;
c6730ed4 JK	260
ce8ab854 AB	261	/*
ce8ab854 AB	262	* spufs_wait
7022543e	263	* Same as wait_event_interruptible(), except that here
ce8ab854 AB	264	* we need to call spu_release(ctx) before sleeping, and
	265	* then spu_acquire(ctx) when awoken.
	266	*/
	267
	268	#define spufs_wait(wq, condition) \
	269	({ \
	270	int __ret = 0; \
	271	DEFINE_WAIT(__wait); \
	272	for (;;) { \
	273	prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
	274	if (condition) \
	275	break; \
d3764397 JK	276	if (signal_pending(current)) { \
	277	__ret = -ERESTARTSYS; \
	278	break; \
ce8ab854	279	} \
d3764397 JK	280	spu_release(ctx); \
	281	schedule(); \
	282	spu_acquire(ctx); \
ce8ab854 AB	283	} \
	284	finish_wait(&(wq), &__wait); \
	285	__ret; \
	286	})
	287
8b3d6663 AB	288	size_t spu_wbox_write(struct spu_context *ctx, u32 data);
	289	size_t spu_ibox_read(struct spu_context ctx, u32 data);
	290
	291	/* irq callback funcs. */
	292	void spufs_ibox_callback(struct spu *spu);
	293	void spufs_wbox_callback(struct spu *spu);
5110459f	294	void spufs_stop_callback(struct spu *spu);
a33a7d73	295	void spufs_mfc_callback(struct spu *spu);
9add11da	296	void spufs_dma_callback(struct spu *spu, int type);
8b3d6663	297
bf1ab978 DGM	298	extern struct spu_coredump_calls spufs_coredump_calls;
	299	struct spufs_coredump_reader {
	300	char *name;
	301	ssize_t (read)(struct spu_context ctx,
	302	char __user buffer, size_t size, loff_t pos);
74de08bc	303	u64 (get)(struct spu_context ctx);
bf1ab978 DGM	304	size_t size;
	305	};
	306	extern struct spufs_coredump_reader spufs_coredump_read[];
	307	extern int spufs_coredump_num_notes;
	308
e9f8a0b6 CH	309	/*
	310	* This function is a little bit too large for an inline, but
	311	* as fault.c is built into the kernel we can't move it out of
	312	* line.
	313	*/
	314	static inline void spuctx_switch_state(struct spu_context *ctx,
27ec41d3	315	enum spu_utilization_state new_state)
e9f8a0b6	316	{
27ec41d3 AD	317	unsigned long long curtime;
	318	signed long long delta;
	319	struct timespec ts;
	320	struct spu *spu;
	321	enum spu_utilization_state old_state;
e9f8a0b6	322
27ec41d3 AD	323	ktime_get_ts(&ts);
	324	curtime = timespec_to_ns(&ts);
	325	delta = curtime - ctx->stats.tstamp;
e9f8a0b6	326
27ec41d3 AD	327	WARN_ON(!mutex_is_locked(&ctx->state_mutex));
	328	WARN_ON(delta < 0);
	329
	330	spu = ctx->spu;
	331	old_state = ctx->stats.util_state;
	332	ctx->stats.util_state = new_state;
	333	ctx->stats.tstamp = curtime;
	334
	335	/*
	336	* Update the physical SPU utilization statistics.
	337	*/
	338	if (spu) {
	339	ctx->stats.times[old_state] += delta;
	340	spu->stats.times[old_state] += delta;
	341	spu->stats.util_state = new_state;
fe2f896d	342	spu->stats.tstamp = curtime;
fe2f896d CH	343	}
	344	}
	345
67207b96	346	#endif