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> 26#include <linux/mutex.h> 27#include <linux/spinlock.h> 28#include <linux/fs.h> 29 30#include <asm/spu.h> 31#include <asm/spu_csa.h> 32#include <asm/spu_info.h> 33 34/* The magic number for our file system */ 35enum { 36 SPUFS_MAGIC = 0x23c9b64e, 37}; 38 39struct spu_context_ops; 40struct spu_gang; 41 42/* ctx->sched_flags */ 43enum { 44 SPU_SCHED_EXITING = 0, 45}; 46 47struct spu_context { 48 struct spu *spu; /* pointer to a physical SPU */ 49 struct spu_state csa; /* SPU context save area. */ 50 spinlock_t mmio_lock; /* protects mmio access */ 51 struct address_space *local_store; /* local store mapping. */ 52 struct address_space *mfc; /* 'mfc' area mappings. */ 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. */ 58 struct mutex mapping_lock; 59 u64 object_id; /* user space pointer for oprofile */ 60 61 enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; 62 struct mutex state_mutex; 63 struct mutex run_mutex; 64 65 struct mm_struct *owner; 66 67 struct kref kref; 68 wait_queue_head_t ibox_wq; 69 wait_queue_head_t wbox_wq; 70 wait_queue_head_t stop_wq; 71 wait_queue_head_t mfc_wq; 72 struct fasync_struct *ibox_fasync; 73 struct fasync_struct *wbox_fasync; 74 struct fasync_struct *mfc_fasync; 75 u32 tagwait; 76 struct spu_context_ops *ops; 77 struct work_struct reap_work; 78 unsigned long flags; 79 unsigned long event_return; 80 81 struct list_head gang_list; 82 struct spu_gang *gang; 83 84 /* scheduler fields */ 85 struct list_head rq; 86 struct delayed_work sched_work; 87 unsigned long sched_flags; 88 unsigned long rt_priority; 89 int policy; 90 int prio; 91}; 92 93struct spu_gang { 94 struct list_head list; 95 struct mutex mutex; 96 struct kref kref; 97 int contexts; 98}; 99 100struct mfc_dma_command { 101 int32_t pad; /* reserved */ 102 uint32_t lsa; /* local storage address */ 103 uint64_t ea; /* effective address */ 104 uint16_t size; /* transfer size */ 105 uint16_t tag; /* command tag */ 106 uint16_t class; /* class ID */ 107 uint16_t cmd; /* command opcode */ 108}; 109 110 111/* SPU context query/set operations. */ 112struct spu_context_ops { 113 int (*mbox_read) (struct spu_context * ctx, u32 * data); 114 u32(*mbox_stat_read) (struct spu_context * ctx); 115 unsigned int (*mbox_stat_poll)(struct spu_context *ctx, 116 unsigned int events); 117 int (*ibox_read) (struct spu_context * ctx, u32 * data); 118 int (*wbox_write) (struct spu_context * ctx, u32 data); 119 u32(*signal1_read) (struct spu_context * ctx); 120 void (*signal1_write) (struct spu_context * ctx, u32 data); 121 u32(*signal2_read) (struct spu_context * ctx); 122 void (*signal2_write) (struct spu_context * ctx, u32 data); 123 void (*signal1_type_set) (struct spu_context * ctx, u64 val); 124 u64(*signal1_type_get) (struct spu_context * ctx); 125 void (*signal2_type_set) (struct spu_context * ctx, u64 val); 126 u64(*signal2_type_get) (struct spu_context * ctx); 127 u32(*npc_read) (struct spu_context * ctx); 128 void (*npc_write) (struct spu_context * ctx, u32 data); 129 u32(*status_read) (struct spu_context * ctx); 130 char*(*get_ls) (struct spu_context * ctx); 131 u32 (*runcntl_read) (struct spu_context * ctx); 132 void (*runcntl_write) (struct spu_context * ctx, u32 data); 133 void (*master_start) (struct spu_context * ctx); 134 void (*master_stop) (struct spu_context * ctx); 135 int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode); 136 u32 (*read_mfc_tagstatus)(struct spu_context * ctx); 137 u32 (*get_mfc_free_elements)(struct spu_context *ctx); 138 int (*send_mfc_command)(struct spu_context * ctx, 139 struct mfc_dma_command * cmd); 140 void (*dma_info_read) (struct spu_context * ctx, 141 struct spu_dma_info * info); 142 void (*proxydma_info_read) (struct spu_context * ctx, 143 struct spu_proxydma_info * info); 144 void (*restart_dma)(struct spu_context *ctx); 145}; 146 147extern struct spu_context_ops spu_hw_ops; 148extern struct spu_context_ops spu_backing_ops; 149 150struct spufs_inode_info { 151 struct spu_context *i_ctx; 152 struct spu_gang *i_gang; 153 struct inode vfs_inode; 154 int i_openers; 155}; 156#define SPUFS_I(inode) \ 157 container_of(inode, struct spufs_inode_info, vfs_inode) 158 159extern struct tree_descr spufs_dir_contents[]; 160extern struct tree_descr spufs_dir_nosched_contents[]; 161 162/* system call implementation */ 163long spufs_run_spu(struct file *file, 164 struct spu_context *ctx, u32 *npc, u32 *status); 165long spufs_create(struct nameidata *nd, 166 unsigned int flags, mode_t mode); 167extern const struct file_operations spufs_context_fops; 168 169/* gang management */ 170struct spu_gang *alloc_spu_gang(void); 171struct spu_gang *get_spu_gang(struct spu_gang *gang); 172int put_spu_gang(struct spu_gang *gang); 173void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx); 174void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx); 175 176/* fault handling */ 177int spufs_handle_class1(struct spu_context *ctx); 178 179/* context management */ 180static inline void spu_acquire(struct spu_context *ctx) 181{ 182 mutex_lock(&ctx->state_mutex); 183} 184 185static inline void spu_release(struct spu_context *ctx) 186{ 187 mutex_unlock(&ctx->state_mutex); 188} 189 190struct spu_context * alloc_spu_context(struct spu_gang *gang); 191void destroy_spu_context(struct kref *kref); 192struct spu_context * get_spu_context(struct spu_context *ctx); 193int put_spu_context(struct spu_context *ctx); 194void spu_unmap_mappings(struct spu_context *ctx); 195 196void spu_forget(struct spu_context *ctx); 197int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags); 198void spu_acquire_saved(struct spu_context *ctx); 199 200int spu_activate(struct spu_context *ctx, unsigned long flags); 201void spu_deactivate(struct spu_context *ctx); 202void spu_yield(struct spu_context *ctx); 203void spu_start_tick(struct spu_context *ctx); 204void spu_stop_tick(struct spu_context *ctx); 205void spu_sched_tick(struct work_struct *work); 206int __init spu_sched_init(void); 207void __exit spu_sched_exit(void); 208 209extern char *isolated_loader; 210 211/* 212 * spufs_wait 213 * Same as wait_event_interruptible(), except that here 214 * we need to call spu_release(ctx) before sleeping, and 215 * then spu_acquire(ctx) when awoken. 216 */ 217 218#define spufs_wait(wq, condition) \ 219({ \ 220 int __ret = 0; \ 221 DEFINE_WAIT(__wait); \ 222 for (;;) { \ 223 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \ 224 if (condition) \ 225 break; \ 226 if (signal_pending(current)) { \ 227 __ret = -ERESTARTSYS; \ 228 break; \ 229 } \ 230 spu_release(ctx); \ 231 schedule(); \ 232 spu_acquire(ctx); \ 233 } \ 234 finish_wait(&(wq), &__wait); \ 235 __ret; \ 236}) 237 238size_t spu_wbox_write(struct spu_context *ctx, u32 data); 239size_t spu_ibox_read(struct spu_context *ctx, u32 *data); 240 241/* irq callback funcs. */ 242void spufs_ibox_callback(struct spu *spu); 243void spufs_wbox_callback(struct spu *spu); 244void spufs_stop_callback(struct spu *spu); 245void spufs_mfc_callback(struct spu *spu); 246void spufs_dma_callback(struct spu *spu, int type); 247 248extern struct spu_coredump_calls spufs_coredump_calls; 249struct spufs_coredump_reader { 250 char *name; 251 ssize_t (*read)(struct spu_context *ctx, 252 char __user *buffer, size_t size, loff_t *pos); 253 u64 (*get)(void *data); 254 size_t size; 255}; 256extern struct spufs_coredump_reader spufs_coredump_read[]; 257extern int spufs_coredump_num_notes; 258 259#endif 260