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