377 lines
11 KiB
C
377 lines
11 KiB
C
|
/*
|
||
|
|
* 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>
|
||
|
|
|
||
|
|
#define SPUFS_PS_MAP_SIZE 0x20000
|
||
|
|
#define SPUFS_MFC_MAP_SIZE 0x1000
|
||
|
|
#define SPUFS_CNTL_MAP_SIZE 0x1000
|
||
|
|
#define SPUFS_CNTL_MAP_SIZE 0x1000
|
||
|
|
#define SPUFS_SIGNAL_MAP_SIZE PAGE_SIZE
|
||
|
|
#define SPUFS_MSS_MAP_SIZE 0x1000
|
||
|
|
|
||
|
|
/* 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() */
|
||
|
|
SPU_SCHED_SPU_RUN, /* context is within spu_run */
|
||
|
|
};
|
||
|
|
|
||
|
|
enum {
|
||
|
|
SWITCH_LOG_BUFSIZE = 4096,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum {
|
||
|
|
SWITCH_LOG_START,
|
||
|
|
SWITCH_LOG_STOP,
|
||
|
|
SWITCH_LOG_EXIT,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct switch_log {
|
||
|
|
wait_queue_head_t wait;
|
||
|
|
unsigned long head;
|
||
|
|
unsigned long tail;
|
||
|
|
struct switch_log_entry {
|
||
|
|
struct timespec tstamp;
|
||
|
|
s32 spu_id;
|
||
|
|
u32 type;
|
||
|
|
u32 val;
|
||
|
|
u64 timebase;
|
||
|
|
} log[];
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|
||
|
|
wait_queue_head_t run_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;
|
||
|
|
int last_ran;
|
||
|
|
|
||
|
|
/* 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;
|
||
|
|
|
||
|
|
/* context switch log */
|
||
|
|
struct switch_log *switch_log;
|
||
|
|
|
||
|
|
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);
|
||
|
|
void (*privcntl_write) (struct spu_context *ctx, u64 data);
|
||
|
|
u32 (*runcntl_read) (struct spu_context * ctx);
|
||
|
|
void (*runcntl_write) (struct spu_context * ctx, u32 data);
|
||
|
|
void (*runcntl_stop) (struct spu_context * ctx);
|
||
|
|
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)
|
||
|
|
|
||
|
|
struct spufs_tree_descr {
|
||
|
|
const char *name;
|
||
|
|
const struct file_operations *ops;
|
||
|
|
int mode;
|
||
|
|
size_t size;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern const struct spufs_tree_descr spufs_dir_contents[];
|
||
|
|
extern const struct spufs_tree_descr spufs_dir_nosched_contents[];
|
||
|
|
extern const struct spufs_tree_descr spufs_dir_debug_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);
|
||
|
|
int spufs_handle_class0(struct spu_context *ctx);
|
||
|
|
|
||
|
|
/* affinity */
|
||
|
|
struct spu *affinity_check(struct spu_context *ctx);
|
||
|
|
|
||
|
|
/* context management */
|
||
|
|
extern atomic_t nr_spu_contexts;
|
||
|
|
static inline int __must_check spu_acquire(struct spu_context *ctx)
|
||
|
|
{
|
||
|
|
return mutex_lock_interruptible(&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 __must_check spu_acquire_saved(struct spu_context *ctx);
|
||
|
|
void spu_release_saved(struct spu_context *ctx);
|
||
|
|
|
||
|
|
int spu_stopped(struct spu_context *ctx, u32 * stat);
|
||
|
|
void spu_del_from_rq(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_switch_log_notify(struct spu *spu, struct spu_context *ctx,
|
||
|
|
u32 type, u32 val);
|
||
|
|
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.
|
||
|
|
*
|
||
|
|
* Returns with state_mutex re-acquired when successful or
|
||
|
|
* with -ERESTARTSYS and the state_mutex dropped when interrupted.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define spufs_wait(wq, condition) \
|
||
|
|
({ \
|
||
|
|
int __ret = 0; \
|
||
|
|
DEFINE_WAIT(__wait); \
|
||
|
|
for (;;) { \
|
||
|
|
prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
|
||
|
|
if (condition) \
|
||
|
|
break; \
|
||
|
|
spu_release(ctx); \
|
||
|
|
if (signal_pending(current)) { \
|
||
|
|
__ret = -ERESTARTSYS; \
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
schedule(); \
|
||
|
|
__ret = spu_acquire(ctx); \
|
||
|
|
if (__ret) \
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
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, int irq);
|
||
|
|
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 const struct spufs_coredump_reader spufs_coredump_read[];
|
||
|
|
extern int spufs_coredump_num_notes;
|
||
|
|
|
||
|
|
extern int spu_init_csa(struct spu_state *csa);
|
||
|
|
extern void spu_fini_csa(struct spu_state *csa);
|
||
|
|
extern int spu_save(struct spu_state *prev, struct spu *spu);
|
||
|
|
extern int spu_restore(struct spu_state *new, struct spu *spu);
|
||
|
|
extern int spu_switch(struct spu_state *prev, struct spu_state *new,
|
||
|
|
struct spu *spu);
|
||
|
|
extern int spu_alloc_lscsa(struct spu_state *csa);
|
||
|
|
extern void spu_free_lscsa(struct spu_state *csa);
|
||
|
|
|
||
|
|
extern void spuctx_switch_state(struct spu_context *ctx,
|
||
|
|
enum spu_utilization_state new_state);
|
||
|
|
|
||
|
|
#endif
|