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67207b96 AB |
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> | |
650f8b02 | 26 | #include <linux/mutex.h> |
67207b96 AB |
27 | #include <linux/spinlock.h> |
28 | #include <linux/fs.h> | |
29 | ||
30 | #include <asm/spu.h> | |
5473af04 | 31 | #include <asm/spu_csa.h> |
b9e3bd77 | 32 | #include <asm/spu_info.h> |
67207b96 AB |
33 | |
34 | /* The magic number for our file system */ | |
35 | enum { | |
36 | SPUFS_MAGIC = 0x23c9b64e, | |
37 | }; | |
38 | ||
8b3d6663 | 39 | struct spu_context_ops; |
6263203e AB |
40 | struct spu_gang; |
41 | ||
26bec673 CH |
42 | /* ctx->sched_flags */ |
43 | enum { | |
08873095 | 44 | SPU_SCHED_EXITING = 0, |
26bec673 CH |
45 | }; |
46 | ||
67207b96 AB |
47 | struct spu_context { |
48 | struct spu *spu; /* pointer to a physical SPU */ | |
5473af04 | 49 | struct spu_state csa; /* SPU context save area. */ |
67207b96 | 50 | spinlock_t mmio_lock; /* protects mmio access */ |
6df10a82 MN |
51 | struct address_space *local_store; /* local store mapping. */ |
52 | struct address_space *mfc; /* 'mfc' area mappings. */ | |
43c2bbd9 CH |
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 | spinlock_t mapping_lock; | |
86767277 | 59 | u64 object_id; /* user space pointer for oprofile */ |
8b3d6663 AB |
60 | |
61 | enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; | |
650f8b02 | 62 | struct mutex state_mutex; |
e45d48a3 | 63 | struct mutex run_mutex; |
8b3d6663 AB |
64 | |
65 | struct mm_struct *owner; | |
67207b96 AB |
66 | |
67 | struct kref kref; | |
8b3d6663 AB |
68 | wait_queue_head_t ibox_wq; |
69 | wait_queue_head_t wbox_wq; | |
5110459f | 70 | wait_queue_head_t stop_wq; |
a33a7d73 | 71 | wait_queue_head_t mfc_wq; |
8b3d6663 AB |
72 | struct fasync_struct *ibox_fasync; |
73 | struct fasync_struct *wbox_fasync; | |
a33a7d73 AB |
74 | struct fasync_struct *mfc_fasync; |
75 | u32 tagwait; | |
8b3d6663 | 76 | struct spu_context_ops *ops; |
2a911f0b | 77 | struct work_struct reap_work; |
9add11da AB |
78 | unsigned long flags; |
79 | unsigned long event_return; | |
6263203e AB |
80 | |
81 | struct list_head gang_list; | |
82 | struct spu_gang *gang; | |
8389998a CH |
83 | |
84 | /* scheduler fields */ | |
079cdb61 | 85 | struct list_head rq; |
2eb1b120 | 86 | struct delayed_work sched_work; |
26bec673 | 87 | unsigned long sched_flags; |
52f04fcf | 88 | unsigned long rt_priority; |
2eb1b120 | 89 | int policy; |
8389998a | 90 | int prio; |
6263203e AB |
91 | }; |
92 | ||
93 | struct spu_gang { | |
94 | struct list_head list; | |
95 | struct mutex mutex; | |
96 | struct kref kref; | |
97 | int contexts; | |
8b3d6663 AB |
98 | }; |
99 | ||
a33a7d73 AB |
100 | struct 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 | ||
8b3d6663 AB |
111 | /* SPU context query/set operations. */ |
112 | struct spu_context_ops { | |
113 | int (*mbox_read) (struct spu_context * ctx, u32 * data); | |
114 | u32(*mbox_stat_read) (struct spu_context * ctx); | |
3a843d7c AB |
115 | unsigned int (*mbox_stat_poll)(struct spu_context *ctx, |
116 | unsigned int events); | |
8b3d6663 AB |
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); | |
3960c260 | 131 | u32 (*runcntl_read) (struct spu_context * ctx); |
5110459f | 132 | void (*runcntl_write) (struct spu_context * ctx, u32 data); |
ee2d7340 AB |
133 | void (*master_start) (struct spu_context * ctx); |
134 | void (*master_stop) (struct spu_context * ctx); | |
a33a7d73 AB |
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); | |
b9e3bd77 DGM |
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); | |
57dace23 | 144 | void (*restart_dma)(struct spu_context *ctx); |
67207b96 AB |
145 | }; |
146 | ||
8b3d6663 AB |
147 | extern struct spu_context_ops spu_hw_ops; |
148 | extern struct spu_context_ops spu_backing_ops; | |
149 | ||
67207b96 AB |
150 | struct spufs_inode_info { |
151 | struct spu_context *i_ctx; | |
6263203e | 152 | struct spu_gang *i_gang; |
67207b96 | 153 | struct inode vfs_inode; |
43c2bbd9 | 154 | int i_openers; |
67207b96 AB |
155 | }; |
156 | #define SPUFS_I(inode) \ | |
157 | container_of(inode, struct spufs_inode_info, vfs_inode) | |
158 | ||
159 | extern struct tree_descr spufs_dir_contents[]; | |
5737edd1 | 160 | extern struct tree_descr spufs_dir_nosched_contents[]; |
67207b96 AB |
161 | |
162 | /* system call implementation */ | |
163 | long spufs_run_spu(struct file *file, | |
164 | struct spu_context *ctx, u32 *npc, u32 *status); | |
6263203e | 165 | long spufs_create(struct nameidata *nd, |
67207b96 | 166 | unsigned int flags, mode_t mode); |
9c2e08c5 | 167 | extern const struct file_operations spufs_context_fops; |
67207b96 | 168 | |
6263203e AB |
169 | /* gang management */ |
170 | struct spu_gang *alloc_spu_gang(void); | |
171 | struct spu_gang *get_spu_gang(struct spu_gang *gang); | |
172 | int put_spu_gang(struct spu_gang *gang); | |
173 | void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx); | |
174 | void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx); | |
175 | ||
57dace23 AB |
176 | /* fault handling */ |
177 | int spufs_handle_class1(struct spu_context *ctx); | |
178 | ||
67207b96 | 179 | /* context management */ |
6a0641e5 CH |
180 | static inline void spu_acquire(struct spu_context *ctx) |
181 | { | |
182 | mutex_lock(&ctx->state_mutex); | |
183 | } | |
184 | ||
185 | static inline void spu_release(struct spu_context *ctx) | |
186 | { | |
187 | mutex_unlock(&ctx->state_mutex); | |
188 | } | |
189 | ||
6263203e | 190 | struct spu_context * alloc_spu_context(struct spu_gang *gang); |
67207b96 AB |
191 | void destroy_spu_context(struct kref *kref); |
192 | struct spu_context * get_spu_context(struct spu_context *ctx); | |
193 | int put_spu_context(struct spu_context *ctx); | |
5110459f | 194 | void spu_unmap_mappings(struct spu_context *ctx); |
67207b96 | 195 | |
8b3d6663 | 196 | void spu_forget(struct spu_context *ctx); |
26bec673 | 197 | int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags); |
67207b96 | 198 | void spu_acquire_saved(struct spu_context *ctx); |
50b520d4 | 199 | |
26bec673 | 200 | int spu_activate(struct spu_context *ctx, unsigned long flags); |
8b3d6663 AB |
201 | void spu_deactivate(struct spu_context *ctx); |
202 | void spu_yield(struct spu_context *ctx); | |
2eb1b120 CH |
203 | void spu_start_tick(struct spu_context *ctx); |
204 | void spu_stop_tick(struct spu_context *ctx); | |
205 | void spu_sched_tick(struct work_struct *work); | |
8b3d6663 AB |
206 | int __init spu_sched_init(void); |
207 | void __exit spu_sched_exit(void); | |
208 | ||
c6730ed4 JK |
209 | extern char *isolated_loader; |
210 | ||
ce8ab854 AB |
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 | spu_release(ctx); \ | |
228 | schedule(); \ | |
229 | spu_acquire(ctx); \ | |
230 | continue; \ | |
231 | } \ | |
232 | __ret = -ERESTARTSYS; \ | |
233 | break; \ | |
234 | } \ | |
235 | finish_wait(&(wq), &__wait); \ | |
236 | __ret; \ | |
237 | }) | |
238 | ||
8b3d6663 AB |
239 | size_t spu_wbox_write(struct spu_context *ctx, u32 data); |
240 | size_t spu_ibox_read(struct spu_context *ctx, u32 *data); | |
241 | ||
242 | /* irq callback funcs. */ | |
243 | void spufs_ibox_callback(struct spu *spu); | |
244 | void spufs_wbox_callback(struct spu *spu); | |
5110459f | 245 | void spufs_stop_callback(struct spu *spu); |
a33a7d73 | 246 | void spufs_mfc_callback(struct spu *spu); |
9add11da | 247 | void spufs_dma_callback(struct spu *spu, int type); |
8b3d6663 | 248 | |
bf1ab978 DGM |
249 | extern struct spu_coredump_calls spufs_coredump_calls; |
250 | struct spufs_coredump_reader { | |
251 | char *name; | |
252 | ssize_t (*read)(struct spu_context *ctx, | |
253 | char __user *buffer, size_t size, loff_t *pos); | |
254 | u64 (*get)(void *data); | |
255 | size_t size; | |
256 | }; | |
257 | extern struct spufs_coredump_reader spufs_coredump_read[]; | |
258 | extern int spufs_coredump_num_notes; | |
259 | ||
67207b96 | 260 | #endif |