| /* |
| * 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 |