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358 lines
11 KiB
358 lines
11 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* SPU file system |
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* |
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005 |
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* |
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* Author: Arnd Bergmann <[email protected]> |
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*/ |
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#ifndef SPUFS_H |
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#define SPUFS_H |
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#include <linux/kref.h> |
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#include <linux/mutex.h> |
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#include <linux/spinlock.h> |
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#include <linux/fs.h> |
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#include <linux/cpumask.h> |
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#include <linux/sched/signal.h> |
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#include <asm/spu.h> |
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#include <asm/spu_csa.h> |
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#include <asm/spu_info.h> |
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#define SPUFS_PS_MAP_SIZE 0x20000 |
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#define SPUFS_MFC_MAP_SIZE 0x1000 |
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#define SPUFS_CNTL_MAP_SIZE 0x1000 |
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#define SPUFS_SIGNAL_MAP_SIZE PAGE_SIZE |
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#define SPUFS_MSS_MAP_SIZE 0x1000 |
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/* The magic number for our file system */ |
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enum { |
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SPUFS_MAGIC = 0x23c9b64e, |
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}; |
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struct spu_context_ops; |
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struct spu_gang; |
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/* ctx->sched_flags */ |
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enum { |
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SPU_SCHED_NOTIFY_ACTIVE, |
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SPU_SCHED_WAS_ACTIVE, /* was active upon spu_acquire_saved() */ |
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SPU_SCHED_SPU_RUN, /* context is within spu_run */ |
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}; |
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enum { |
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SWITCH_LOG_BUFSIZE = 4096, |
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}; |
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enum { |
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SWITCH_LOG_START, |
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SWITCH_LOG_STOP, |
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SWITCH_LOG_EXIT, |
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}; |
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struct switch_log { |
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wait_queue_head_t wait; |
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unsigned long head; |
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unsigned long tail; |
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struct switch_log_entry { |
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struct timespec64 tstamp; |
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s32 spu_id; |
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u32 type; |
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u32 val; |
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u64 timebase; |
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} log[]; |
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}; |
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struct spu_context { |
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struct spu *spu; /* pointer to a physical SPU */ |
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struct spu_state csa; /* SPU context save area. */ |
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spinlock_t mmio_lock; /* protects mmio access */ |
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struct address_space *local_store; /* local store mapping. */ |
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struct address_space *mfc; /* 'mfc' area mappings. */ |
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struct address_space *cntl; /* 'control' area mappings. */ |
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struct address_space *signal1; /* 'signal1' area mappings. */ |
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struct address_space *signal2; /* 'signal2' area mappings. */ |
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struct address_space *mss; /* 'mss' area mappings. */ |
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struct address_space *psmap; /* 'psmap' area mappings. */ |
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struct mutex mapping_lock; |
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u64 object_id; /* user space pointer for oprofile */ |
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enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; |
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struct mutex state_mutex; |
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struct mutex run_mutex; |
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struct mm_struct *owner; |
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struct kref kref; |
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wait_queue_head_t ibox_wq; |
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wait_queue_head_t wbox_wq; |
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wait_queue_head_t stop_wq; |
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wait_queue_head_t mfc_wq; |
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wait_queue_head_t run_wq; |
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u32 tagwait; |
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struct spu_context_ops *ops; |
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struct work_struct reap_work; |
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unsigned long flags; |
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unsigned long event_return; |
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struct list_head gang_list; |
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struct spu_gang *gang; |
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struct kref *prof_priv_kref; |
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void ( * prof_priv_release) (struct kref *kref); |
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/* owner thread */ |
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pid_t tid; |
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/* scheduler fields */ |
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struct list_head rq; |
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unsigned int time_slice; |
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unsigned long sched_flags; |
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cpumask_t cpus_allowed; |
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int policy; |
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int prio; |
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int last_ran; |
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/* statistics */ |
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struct { |
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/* updates protected by ctx->state_mutex */ |
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enum spu_utilization_state util_state; |
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unsigned long long tstamp; /* time of last state switch */ |
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unsigned long long times[SPU_UTIL_MAX]; |
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unsigned long long vol_ctx_switch; |
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unsigned long long invol_ctx_switch; |
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unsigned long long min_flt; |
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unsigned long long maj_flt; |
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unsigned long long hash_flt; |
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unsigned long long slb_flt; |
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unsigned long long slb_flt_base; /* # at last ctx switch */ |
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unsigned long long class2_intr; |
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unsigned long long class2_intr_base; /* # at last ctx switch */ |
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unsigned long long libassist; |
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} stats; |
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/* context switch log */ |
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struct switch_log *switch_log; |
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struct list_head aff_list; |
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int aff_head; |
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int aff_offset; |
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}; |
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struct spu_gang { |
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struct list_head list; |
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struct mutex mutex; |
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struct kref kref; |
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int contexts; |
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struct spu_context *aff_ref_ctx; |
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struct list_head aff_list_head; |
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struct mutex aff_mutex; |
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int aff_flags; |
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struct spu *aff_ref_spu; |
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atomic_t aff_sched_count; |
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}; |
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/* Flag bits for spu_gang aff_flags */ |
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#define AFF_OFFSETS_SET 1 |
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#define AFF_MERGED 2 |
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struct mfc_dma_command { |
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int32_t pad; /* reserved */ |
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uint32_t lsa; /* local storage address */ |
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uint64_t ea; /* effective address */ |
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uint16_t size; /* transfer size */ |
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uint16_t tag; /* command tag */ |
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uint16_t class; /* class ID */ |
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uint16_t cmd; /* command opcode */ |
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}; |
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/* SPU context query/set operations. */ |
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struct spu_context_ops { |
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int (*mbox_read) (struct spu_context * ctx, u32 * data); |
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u32(*mbox_stat_read) (struct spu_context * ctx); |
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__poll_t (*mbox_stat_poll)(struct spu_context *ctx, __poll_t events); |
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int (*ibox_read) (struct spu_context * ctx, u32 * data); |
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int (*wbox_write) (struct spu_context * ctx, u32 data); |
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u32(*signal1_read) (struct spu_context * ctx); |
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void (*signal1_write) (struct spu_context * ctx, u32 data); |
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u32(*signal2_read) (struct spu_context * ctx); |
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void (*signal2_write) (struct spu_context * ctx, u32 data); |
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void (*signal1_type_set) (struct spu_context * ctx, u64 val); |
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u64(*signal1_type_get) (struct spu_context * ctx); |
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void (*signal2_type_set) (struct spu_context * ctx, u64 val); |
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u64(*signal2_type_get) (struct spu_context * ctx); |
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u32(*npc_read) (struct spu_context * ctx); |
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void (*npc_write) (struct spu_context * ctx, u32 data); |
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u32(*status_read) (struct spu_context * ctx); |
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char*(*get_ls) (struct spu_context * ctx); |
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void (*privcntl_write) (struct spu_context *ctx, u64 data); |
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u32 (*runcntl_read) (struct spu_context * ctx); |
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void (*runcntl_write) (struct spu_context * ctx, u32 data); |
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void (*runcntl_stop) (struct spu_context * ctx); |
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void (*master_start) (struct spu_context * ctx); |
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void (*master_stop) (struct spu_context * ctx); |
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int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode); |
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u32 (*read_mfc_tagstatus)(struct spu_context * ctx); |
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u32 (*get_mfc_free_elements)(struct spu_context *ctx); |
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int (*send_mfc_command)(struct spu_context * ctx, |
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struct mfc_dma_command * cmd); |
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void (*dma_info_read) (struct spu_context * ctx, |
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struct spu_dma_info * info); |
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void (*proxydma_info_read) (struct spu_context * ctx, |
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struct spu_proxydma_info * info); |
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void (*restart_dma)(struct spu_context *ctx); |
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}; |
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extern struct spu_context_ops spu_hw_ops; |
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extern struct spu_context_ops spu_backing_ops; |
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struct spufs_inode_info { |
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struct spu_context *i_ctx; |
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struct spu_gang *i_gang; |
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struct inode vfs_inode; |
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int i_openers; |
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}; |
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#define SPUFS_I(inode) \ |
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container_of(inode, struct spufs_inode_info, vfs_inode) |
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struct spufs_tree_descr { |
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const char *name; |
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const struct file_operations *ops; |
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umode_t mode; |
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size_t size; |
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}; |
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extern const struct spufs_tree_descr spufs_dir_contents[]; |
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extern const struct spufs_tree_descr spufs_dir_nosched_contents[]; |
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extern const struct spufs_tree_descr spufs_dir_debug_contents[]; |
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/* system call implementation */ |
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extern struct spufs_calls spufs_calls; |
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struct coredump_params; |
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long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status); |
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long spufs_create(struct path *nd, struct dentry *dentry, unsigned int flags, |
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umode_t mode, struct file *filp); |
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/* ELF coredump callbacks for writing SPU ELF notes */ |
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extern int spufs_coredump_extra_notes_size(void); |
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extern int spufs_coredump_extra_notes_write(struct coredump_params *cprm); |
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extern const struct file_operations spufs_context_fops; |
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/* gang management */ |
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struct spu_gang *alloc_spu_gang(void); |
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struct spu_gang *get_spu_gang(struct spu_gang *gang); |
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int put_spu_gang(struct spu_gang *gang); |
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void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx); |
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void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx); |
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/* fault handling */ |
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int spufs_handle_class1(struct spu_context *ctx); |
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int spufs_handle_class0(struct spu_context *ctx); |
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/* affinity */ |
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struct spu *affinity_check(struct spu_context *ctx); |
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/* context management */ |
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extern atomic_t nr_spu_contexts; |
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static inline int __must_check spu_acquire(struct spu_context *ctx) |
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{ |
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return mutex_lock_interruptible(&ctx->state_mutex); |
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} |
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static inline void spu_release(struct spu_context *ctx) |
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{ |
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mutex_unlock(&ctx->state_mutex); |
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} |
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struct spu_context * alloc_spu_context(struct spu_gang *gang); |
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void destroy_spu_context(struct kref *kref); |
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struct spu_context * get_spu_context(struct spu_context *ctx); |
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int put_spu_context(struct spu_context *ctx); |
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void spu_unmap_mappings(struct spu_context *ctx); |
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void spu_forget(struct spu_context *ctx); |
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int __must_check spu_acquire_saved(struct spu_context *ctx); |
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void spu_release_saved(struct spu_context *ctx); |
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int spu_stopped(struct spu_context *ctx, u32 * stat); |
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void spu_del_from_rq(struct spu_context *ctx); |
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int spu_activate(struct spu_context *ctx, unsigned long flags); |
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void spu_deactivate(struct spu_context *ctx); |
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void spu_yield(struct spu_context *ctx); |
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void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx, |
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u32 type, u32 val); |
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void spu_set_timeslice(struct spu_context *ctx); |
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void spu_update_sched_info(struct spu_context *ctx); |
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void __spu_update_sched_info(struct spu_context *ctx); |
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int __init spu_sched_init(void); |
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void spu_sched_exit(void); |
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extern char *isolated_loader; |
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/* |
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* spufs_wait |
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* Same as wait_event_interruptible(), except that here |
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* we need to call spu_release(ctx) before sleeping, and |
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* then spu_acquire(ctx) when awoken. |
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* |
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* Returns with state_mutex re-acquired when successful or |
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* with -ERESTARTSYS and the state_mutex dropped when interrupted. |
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*/ |
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#define spufs_wait(wq, condition) \ |
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({ \ |
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int __ret = 0; \ |
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DEFINE_WAIT(__wait); \ |
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for (;;) { \ |
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prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \ |
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if (condition) \ |
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break; \ |
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spu_release(ctx); \ |
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if (signal_pending(current)) { \ |
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__ret = -ERESTARTSYS; \ |
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break; \ |
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} \ |
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schedule(); \ |
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__ret = spu_acquire(ctx); \ |
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if (__ret) \ |
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break; \ |
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} \ |
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finish_wait(&(wq), &__wait); \ |
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__ret; \ |
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}) |
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size_t spu_wbox_write(struct spu_context *ctx, u32 data); |
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size_t spu_ibox_read(struct spu_context *ctx, u32 *data); |
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/* irq callback funcs. */ |
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void spufs_ibox_callback(struct spu *spu); |
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void spufs_wbox_callback(struct spu *spu); |
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void spufs_stop_callback(struct spu *spu, int irq); |
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void spufs_mfc_callback(struct spu *spu); |
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void spufs_dma_callback(struct spu *spu, int type); |
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extern struct spu_coredump_calls spufs_coredump_calls; |
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struct spufs_coredump_reader { |
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char *name; |
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ssize_t (*dump)(struct spu_context *ctx, struct coredump_params *cprm); |
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u64 (*get)(struct spu_context *ctx); |
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size_t size; |
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}; |
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extern const struct spufs_coredump_reader spufs_coredump_read[]; |
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extern int spufs_coredump_num_notes; |
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extern int spu_init_csa(struct spu_state *csa); |
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extern void spu_fini_csa(struct spu_state *csa); |
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extern int spu_save(struct spu_state *prev, struct spu *spu); |
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extern int spu_restore(struct spu_state *new, struct spu *spu); |
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extern int spu_switch(struct spu_state *prev, struct spu_state *new, |
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struct spu *spu); |
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extern int spu_alloc_lscsa(struct spu_state *csa); |
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extern void spu_free_lscsa(struct spu_state *csa); |
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extern void spuctx_switch_state(struct spu_context *ctx, |
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enum spu_utilization_state new_state); |
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#endif
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