Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 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/rwsem.h> |
| 27 | #include <linux/spinlock.h> |
| 28 | #include <linux/fs.h> |
| 29 | |
| 30 | #include <asm/spu.h> |
Mark Nutter | 5473af0 | 2005-11-15 15:53:49 -0500 | [diff] [blame] | 31 | #include <asm/spu_csa.h> |
Dwayne Grant McConnell | b9e3bd7 | 2006-11-20 18:44:58 +0100 | [diff] [blame] | 32 | #include <asm/spu_info.h> |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 33 | |
| 34 | /* The magic number for our file system */ |
| 35 | enum { |
| 36 | SPUFS_MAGIC = 0x23c9b64e, |
| 37 | }; |
| 38 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 39 | struct spu_context_ops; |
| 40 | |
Arnd Bergmann | 8837d92 | 2006-01-04 20:31:28 +0100 | [diff] [blame] | 41 | #define SPU_CONTEXT_PREEMPT 0UL |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 42 | |
Arnd Bergmann | 6263203 | 2006-10-04 17:26:15 +0200 | [diff] [blame] | 43 | struct spu_gang; |
| 44 | |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 45 | struct spu_context { |
| 46 | struct spu *spu; /* pointer to a physical SPU */ |
Mark Nutter | 5473af0 | 2005-11-15 15:53:49 -0500 | [diff] [blame] | 47 | struct spu_state csa; /* SPU context save area. */ |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 48 | spinlock_t mmio_lock; /* protects mmio access */ |
Mark Nutter | 6df10a8 | 2006-03-23 00:00:12 +0100 | [diff] [blame] | 49 | struct address_space *local_store; /* local store mapping. */ |
| 50 | struct address_space *mfc; /* 'mfc' area mappings. */ |
| 51 | struct address_space *cntl; /* 'control' area mappings. */ |
| 52 | struct address_space *signal1; /* 'signal1' area mappings. */ |
| 53 | struct address_space *signal2; /* 'signal2' area mappings. */ |
Benjamin Herrenschmidt | 17e0e27 | 2007-02-13 11:46:08 +1100 | [diff] [blame^] | 54 | struct address_space *mss; /* 'mss' area mappings. */ |
| 55 | struct address_space *psmap; /* 'psmap' area mappings. */ |
Arnd Bergmann | 8676727 | 2006-10-04 17:26:21 +0200 | [diff] [blame] | 56 | u64 object_id; /* user space pointer for oprofile */ |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 57 | |
| 58 | enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; |
| 59 | struct rw_semaphore state_sema; |
Arnd Bergmann | 5ef8224 | 2006-01-04 20:31:24 +0100 | [diff] [blame] | 60 | struct semaphore run_sema; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 61 | |
| 62 | struct mm_struct *owner; |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 63 | |
| 64 | struct kref kref; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 65 | wait_queue_head_t ibox_wq; |
| 66 | wait_queue_head_t wbox_wq; |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 67 | wait_queue_head_t stop_wq; |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 68 | wait_queue_head_t mfc_wq; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 69 | struct fasync_struct *ibox_fasync; |
| 70 | struct fasync_struct *wbox_fasync; |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 71 | struct fasync_struct *mfc_fasync; |
| 72 | u32 tagwait; |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 73 | struct spu_context_ops *ops; |
Arnd Bergmann | 2a911f0 | 2005-12-05 22:52:26 -0500 | [diff] [blame] | 74 | struct work_struct reap_work; |
Arnd Bergmann | 9add11d | 2006-10-04 17:26:14 +0200 | [diff] [blame] | 75 | unsigned long flags; |
| 76 | unsigned long event_return; |
Arnd Bergmann | 6263203 | 2006-10-04 17:26:15 +0200 | [diff] [blame] | 77 | |
| 78 | struct list_head gang_list; |
| 79 | struct spu_gang *gang; |
| 80 | }; |
| 81 | |
| 82 | struct spu_gang { |
| 83 | struct list_head list; |
| 84 | struct mutex mutex; |
| 85 | struct kref kref; |
| 86 | int contexts; |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 87 | }; |
| 88 | |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 89 | struct mfc_dma_command { |
| 90 | int32_t pad; /* reserved */ |
| 91 | uint32_t lsa; /* local storage address */ |
| 92 | uint64_t ea; /* effective address */ |
| 93 | uint16_t size; /* transfer size */ |
| 94 | uint16_t tag; /* command tag */ |
| 95 | uint16_t class; /* class ID */ |
| 96 | uint16_t cmd; /* command opcode */ |
| 97 | }; |
| 98 | |
| 99 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 100 | /* SPU context query/set operations. */ |
| 101 | struct spu_context_ops { |
| 102 | int (*mbox_read) (struct spu_context * ctx, u32 * data); |
| 103 | u32(*mbox_stat_read) (struct spu_context * ctx); |
Arnd Bergmann | 3a843d7 | 2005-12-05 22:52:27 -0500 | [diff] [blame] | 104 | unsigned int (*mbox_stat_poll)(struct spu_context *ctx, |
| 105 | unsigned int events); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 106 | int (*ibox_read) (struct spu_context * ctx, u32 * data); |
| 107 | int (*wbox_write) (struct spu_context * ctx, u32 data); |
| 108 | u32(*signal1_read) (struct spu_context * ctx); |
| 109 | void (*signal1_write) (struct spu_context * ctx, u32 data); |
| 110 | u32(*signal2_read) (struct spu_context * ctx); |
| 111 | void (*signal2_write) (struct spu_context * ctx, u32 data); |
| 112 | void (*signal1_type_set) (struct spu_context * ctx, u64 val); |
| 113 | u64(*signal1_type_get) (struct spu_context * ctx); |
| 114 | void (*signal2_type_set) (struct spu_context * ctx, u64 val); |
| 115 | u64(*signal2_type_get) (struct spu_context * ctx); |
| 116 | u32(*npc_read) (struct spu_context * ctx); |
| 117 | void (*npc_write) (struct spu_context * ctx, u32 data); |
| 118 | u32(*status_read) (struct spu_context * ctx); |
| 119 | char*(*get_ls) (struct spu_context * ctx); |
Jeremy Kerr | 3960c26 | 2006-11-20 18:45:09 +0100 | [diff] [blame] | 120 | u32 (*runcntl_read) (struct spu_context * ctx); |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 121 | void (*runcntl_write) (struct spu_context * ctx, u32 data); |
Arnd Bergmann | ee2d734 | 2006-11-20 18:45:08 +0100 | [diff] [blame] | 122 | void (*master_start) (struct spu_context * ctx); |
| 123 | void (*master_stop) (struct spu_context * ctx); |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 124 | int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode); |
| 125 | u32 (*read_mfc_tagstatus)(struct spu_context * ctx); |
| 126 | u32 (*get_mfc_free_elements)(struct spu_context *ctx); |
Dwayne Grant McConnell | b9e3bd7 | 2006-11-20 18:44:58 +0100 | [diff] [blame] | 127 | int (*send_mfc_command)(struct spu_context * ctx, |
| 128 | struct mfc_dma_command * cmd); |
| 129 | void (*dma_info_read) (struct spu_context * ctx, |
| 130 | struct spu_dma_info * info); |
| 131 | void (*proxydma_info_read) (struct spu_context * ctx, |
| 132 | struct spu_proxydma_info * info); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 133 | }; |
| 134 | |
| 135 | extern struct spu_context_ops spu_hw_ops; |
| 136 | extern struct spu_context_ops spu_backing_ops; |
| 137 | |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 138 | struct spufs_inode_info { |
| 139 | struct spu_context *i_ctx; |
Arnd Bergmann | 6263203 | 2006-10-04 17:26:15 +0200 | [diff] [blame] | 140 | struct spu_gang *i_gang; |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 141 | struct inode vfs_inode; |
| 142 | }; |
| 143 | #define SPUFS_I(inode) \ |
| 144 | container_of(inode, struct spufs_inode_info, vfs_inode) |
| 145 | |
| 146 | extern struct tree_descr spufs_dir_contents[]; |
Mark Nutter | 5737edd | 2006-10-24 18:31:16 +0200 | [diff] [blame] | 147 | extern struct tree_descr spufs_dir_nosched_contents[]; |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 148 | |
| 149 | /* system call implementation */ |
| 150 | long spufs_run_spu(struct file *file, |
| 151 | struct spu_context *ctx, u32 *npc, u32 *status); |
Arnd Bergmann | 6263203 | 2006-10-04 17:26:15 +0200 | [diff] [blame] | 152 | long spufs_create(struct nameidata *nd, |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 153 | unsigned int flags, mode_t mode); |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 154 | extern const struct file_operations spufs_context_fops; |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 155 | |
Arnd Bergmann | 6263203 | 2006-10-04 17:26:15 +0200 | [diff] [blame] | 156 | /* gang management */ |
| 157 | struct spu_gang *alloc_spu_gang(void); |
| 158 | struct spu_gang *get_spu_gang(struct spu_gang *gang); |
| 159 | int put_spu_gang(struct spu_gang *gang); |
| 160 | void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx); |
| 161 | void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx); |
| 162 | |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 163 | /* context management */ |
Arnd Bergmann | 6263203 | 2006-10-04 17:26:15 +0200 | [diff] [blame] | 164 | struct spu_context * alloc_spu_context(struct spu_gang *gang); |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 165 | void destroy_spu_context(struct kref *kref); |
| 166 | struct spu_context * get_spu_context(struct spu_context *ctx); |
| 167 | int put_spu_context(struct spu_context *ctx); |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 168 | void spu_unmap_mappings(struct spu_context *ctx); |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 169 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 170 | void spu_forget(struct spu_context *ctx); |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 171 | void spu_acquire(struct spu_context *ctx); |
| 172 | void spu_release(struct spu_context *ctx); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 173 | int spu_acquire_runnable(struct spu_context *ctx); |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 174 | void spu_acquire_saved(struct spu_context *ctx); |
Jeremy Kerr | 099814b | 2006-10-24 18:31:19 +0200 | [diff] [blame] | 175 | int spu_acquire_exclusive(struct spu_context *ctx); |
| 176 | |
| 177 | static inline void spu_release_exclusive(struct spu_context *ctx) |
| 178 | { |
| 179 | up_write(&ctx->state_sema); |
| 180 | } |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 181 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 182 | int spu_activate(struct spu_context *ctx, u64 flags); |
| 183 | void spu_deactivate(struct spu_context *ctx); |
| 184 | void spu_yield(struct spu_context *ctx); |
| 185 | int __init spu_sched_init(void); |
| 186 | void __exit spu_sched_exit(void); |
| 187 | |
Jeremy Kerr | c6730ed | 2006-11-20 18:45:10 +0100 | [diff] [blame] | 188 | extern char *isolated_loader; |
| 189 | |
Arnd Bergmann | ce8ab85 | 2006-01-04 20:31:29 +0100 | [diff] [blame] | 190 | /* |
| 191 | * spufs_wait |
| 192 | * Same as wait_event_interruptible(), except that here |
| 193 | * we need to call spu_release(ctx) before sleeping, and |
| 194 | * then spu_acquire(ctx) when awoken. |
| 195 | */ |
| 196 | |
| 197 | #define spufs_wait(wq, condition) \ |
| 198 | ({ \ |
| 199 | int __ret = 0; \ |
| 200 | DEFINE_WAIT(__wait); \ |
| 201 | for (;;) { \ |
| 202 | prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \ |
| 203 | if (condition) \ |
| 204 | break; \ |
| 205 | if (!signal_pending(current)) { \ |
| 206 | spu_release(ctx); \ |
| 207 | schedule(); \ |
| 208 | spu_acquire(ctx); \ |
| 209 | continue; \ |
| 210 | } \ |
| 211 | __ret = -ERESTARTSYS; \ |
| 212 | break; \ |
| 213 | } \ |
| 214 | finish_wait(&(wq), &__wait); \ |
| 215 | __ret; \ |
| 216 | }) |
| 217 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 218 | size_t spu_wbox_write(struct spu_context *ctx, u32 data); |
| 219 | size_t spu_ibox_read(struct spu_context *ctx, u32 *data); |
| 220 | |
| 221 | /* irq callback funcs. */ |
| 222 | void spufs_ibox_callback(struct spu *spu); |
| 223 | void spufs_wbox_callback(struct spu *spu); |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame] | 224 | void spufs_stop_callback(struct spu *spu); |
Arnd Bergmann | a33a7d7 | 2006-03-23 00:00:11 +0100 | [diff] [blame] | 225 | void spufs_mfc_callback(struct spu *spu); |
Arnd Bergmann | 9add11d | 2006-10-04 17:26:14 +0200 | [diff] [blame] | 226 | void spufs_dma_callback(struct spu *spu, int type); |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 227 | |
Dwayne Grant McConnell | bf1ab97 | 2006-11-23 00:46:37 +0100 | [diff] [blame] | 228 | extern struct spu_coredump_calls spufs_coredump_calls; |
| 229 | struct spufs_coredump_reader { |
| 230 | char *name; |
| 231 | ssize_t (*read)(struct spu_context *ctx, |
| 232 | char __user *buffer, size_t size, loff_t *pos); |
| 233 | u64 (*get)(void *data); |
| 234 | size_t size; |
| 235 | }; |
| 236 | extern struct spufs_coredump_reader spufs_coredump_read[]; |
| 237 | extern int spufs_coredump_num_notes; |
| 238 | |
Arnd Bergmann | 67207b9 | 2005-11-15 15:53:48 -0500 | [diff] [blame] | 239 | #endif |