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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> | |
26 | #include <linux/rwsem.h> | |
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 AB |
39 | struct spu_context_ops; |
40 | ||
8837d921 | 41 | #define SPU_CONTEXT_PREEMPT 0UL |
2a911f0b | 42 | |
6263203e AB |
43 | struct spu_gang; |
44 | ||
67207b96 AB |
45 | struct spu_context { |
46 | struct spu *spu; /* pointer to a physical SPU */ | |
5473af04 | 47 | struct spu_state csa; /* SPU context save area. */ |
67207b96 | 48 | spinlock_t mmio_lock; /* protects mmio access */ |
6df10a82 MN |
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. */ | |
86767277 | 54 | u64 object_id; /* user space pointer for oprofile */ |
8b3d6663 AB |
55 | |
56 | enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; | |
57 | struct rw_semaphore state_sema; | |
5ef8224a | 58 | struct semaphore run_sema; |
8b3d6663 AB |
59 | |
60 | struct mm_struct *owner; | |
67207b96 AB |
61 | |
62 | struct kref kref; | |
8b3d6663 AB |
63 | wait_queue_head_t ibox_wq; |
64 | wait_queue_head_t wbox_wq; | |
5110459f | 65 | wait_queue_head_t stop_wq; |
a33a7d73 | 66 | wait_queue_head_t mfc_wq; |
8b3d6663 AB |
67 | struct fasync_struct *ibox_fasync; |
68 | struct fasync_struct *wbox_fasync; | |
a33a7d73 AB |
69 | struct fasync_struct *mfc_fasync; |
70 | u32 tagwait; | |
8b3d6663 | 71 | struct spu_context_ops *ops; |
2a911f0b | 72 | struct work_struct reap_work; |
9add11da AB |
73 | unsigned long flags; |
74 | unsigned long event_return; | |
6263203e AB |
75 | |
76 | struct list_head gang_list; | |
77 | struct spu_gang *gang; | |
78 | }; | |
79 | ||
80 | struct spu_gang { | |
81 | struct list_head list; | |
82 | struct mutex mutex; | |
83 | struct kref kref; | |
84 | int contexts; | |
8b3d6663 AB |
85 | }; |
86 | ||
a33a7d73 AB |
87 | struct mfc_dma_command { |
88 | int32_t pad; /* reserved */ | |
89 | uint32_t lsa; /* local storage address */ | |
90 | uint64_t ea; /* effective address */ | |
91 | uint16_t size; /* transfer size */ | |
92 | uint16_t tag; /* command tag */ | |
93 | uint16_t class; /* class ID */ | |
94 | uint16_t cmd; /* command opcode */ | |
95 | }; | |
96 | ||
97 | ||
8b3d6663 AB |
98 | /* SPU context query/set operations. */ |
99 | struct spu_context_ops { | |
100 | int (*mbox_read) (struct spu_context * ctx, u32 * data); | |
101 | u32(*mbox_stat_read) (struct spu_context * ctx); | |
3a843d7c AB |
102 | unsigned int (*mbox_stat_poll)(struct spu_context *ctx, |
103 | unsigned int events); | |
8b3d6663 AB |
104 | int (*ibox_read) (struct spu_context * ctx, u32 * data); |
105 | int (*wbox_write) (struct spu_context * ctx, u32 data); | |
106 | u32(*signal1_read) (struct spu_context * ctx); | |
107 | void (*signal1_write) (struct spu_context * ctx, u32 data); | |
108 | u32(*signal2_read) (struct spu_context * ctx); | |
109 | void (*signal2_write) (struct spu_context * ctx, u32 data); | |
110 | void (*signal1_type_set) (struct spu_context * ctx, u64 val); | |
111 | u64(*signal1_type_get) (struct spu_context * ctx); | |
112 | void (*signal2_type_set) (struct spu_context * ctx, u64 val); | |
113 | u64(*signal2_type_get) (struct spu_context * ctx); | |
114 | u32(*npc_read) (struct spu_context * ctx); | |
115 | void (*npc_write) (struct spu_context * ctx, u32 data); | |
116 | u32(*status_read) (struct spu_context * ctx); | |
117 | char*(*get_ls) (struct spu_context * ctx); | |
3960c260 | 118 | u32 (*runcntl_read) (struct spu_context * ctx); |
5110459f | 119 | void (*runcntl_write) (struct spu_context * ctx, u32 data); |
ee2d7340 AB |
120 | void (*master_start) (struct spu_context * ctx); |
121 | void (*master_stop) (struct spu_context * ctx); | |
a33a7d73 AB |
122 | int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode); |
123 | u32 (*read_mfc_tagstatus)(struct spu_context * ctx); | |
124 | u32 (*get_mfc_free_elements)(struct spu_context *ctx); | |
b9e3bd77 DGM |
125 | int (*send_mfc_command)(struct spu_context * ctx, |
126 | struct mfc_dma_command * cmd); | |
127 | void (*dma_info_read) (struct spu_context * ctx, | |
128 | struct spu_dma_info * info); | |
129 | void (*proxydma_info_read) (struct spu_context * ctx, | |
130 | struct spu_proxydma_info * info); | |
67207b96 AB |
131 | }; |
132 | ||
8b3d6663 AB |
133 | extern struct spu_context_ops spu_hw_ops; |
134 | extern struct spu_context_ops spu_backing_ops; | |
135 | ||
67207b96 AB |
136 | struct spufs_inode_info { |
137 | struct spu_context *i_ctx; | |
6263203e | 138 | struct spu_gang *i_gang; |
67207b96 AB |
139 | struct inode vfs_inode; |
140 | }; | |
141 | #define SPUFS_I(inode) \ | |
142 | container_of(inode, struct spufs_inode_info, vfs_inode) | |
143 | ||
144 | extern struct tree_descr spufs_dir_contents[]; | |
5737edd1 | 145 | extern struct tree_descr spufs_dir_nosched_contents[]; |
67207b96 AB |
146 | |
147 | /* system call implementation */ | |
148 | long spufs_run_spu(struct file *file, | |
149 | struct spu_context *ctx, u32 *npc, u32 *status); | |
6263203e | 150 | long spufs_create(struct nameidata *nd, |
67207b96 | 151 | unsigned int flags, mode_t mode); |
e80358ad | 152 | extern struct file_operations spufs_context_fops; |
67207b96 | 153 | |
6263203e AB |
154 | /* gang management */ |
155 | struct spu_gang *alloc_spu_gang(void); | |
156 | struct spu_gang *get_spu_gang(struct spu_gang *gang); | |
157 | int put_spu_gang(struct spu_gang *gang); | |
158 | void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx); | |
159 | void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx); | |
160 | ||
67207b96 | 161 | /* context management */ |
6263203e | 162 | struct spu_context * alloc_spu_context(struct spu_gang *gang); |
67207b96 AB |
163 | void destroy_spu_context(struct kref *kref); |
164 | struct spu_context * get_spu_context(struct spu_context *ctx); | |
165 | int put_spu_context(struct spu_context *ctx); | |
5110459f | 166 | void spu_unmap_mappings(struct spu_context *ctx); |
67207b96 | 167 | |
8b3d6663 | 168 | void spu_forget(struct spu_context *ctx); |
67207b96 AB |
169 | void spu_acquire(struct spu_context *ctx); |
170 | void spu_release(struct spu_context *ctx); | |
8b3d6663 | 171 | int spu_acquire_runnable(struct spu_context *ctx); |
67207b96 | 172 | void spu_acquire_saved(struct spu_context *ctx); |
099814bb JK |
173 | int spu_acquire_exclusive(struct spu_context *ctx); |
174 | ||
175 | static inline void spu_release_exclusive(struct spu_context *ctx) | |
176 | { | |
177 | up_write(&ctx->state_sema); | |
178 | } | |
67207b96 | 179 | |
8b3d6663 AB |
180 | int spu_activate(struct spu_context *ctx, u64 flags); |
181 | void spu_deactivate(struct spu_context *ctx); | |
182 | void spu_yield(struct spu_context *ctx); | |
183 | int __init spu_sched_init(void); | |
184 | void __exit spu_sched_exit(void); | |
185 | ||
c6730ed4 JK |
186 | extern char *isolated_loader; |
187 | ||
ce8ab854 AB |
188 | /* |
189 | * spufs_wait | |
190 | * Same as wait_event_interruptible(), except that here | |
191 | * we need to call spu_release(ctx) before sleeping, and | |
192 | * then spu_acquire(ctx) when awoken. | |
193 | */ | |
194 | ||
195 | #define spufs_wait(wq, condition) \ | |
196 | ({ \ | |
197 | int __ret = 0; \ | |
198 | DEFINE_WAIT(__wait); \ | |
199 | for (;;) { \ | |
200 | prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \ | |
201 | if (condition) \ | |
202 | break; \ | |
203 | if (!signal_pending(current)) { \ | |
204 | spu_release(ctx); \ | |
205 | schedule(); \ | |
206 | spu_acquire(ctx); \ | |
207 | continue; \ | |
208 | } \ | |
209 | __ret = -ERESTARTSYS; \ | |
210 | break; \ | |
211 | } \ | |
212 | finish_wait(&(wq), &__wait); \ | |
213 | __ret; \ | |
214 | }) | |
215 | ||
8b3d6663 AB |
216 | size_t spu_wbox_write(struct spu_context *ctx, u32 data); |
217 | size_t spu_ibox_read(struct spu_context *ctx, u32 *data); | |
218 | ||
219 | /* irq callback funcs. */ | |
220 | void spufs_ibox_callback(struct spu *spu); | |
221 | void spufs_wbox_callback(struct spu *spu); | |
5110459f | 222 | void spufs_stop_callback(struct spu *spu); |
a33a7d73 | 223 | void spufs_mfc_callback(struct spu *spu); |
9add11da | 224 | void spufs_dma_callback(struct spu *spu, int type); |
8b3d6663 | 225 | |
67207b96 | 226 | #endif |