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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> |
67207b96 AB |
32 | |
33 | /* The magic number for our file system */ | |
34 | enum { | |
35 | SPUFS_MAGIC = 0x23c9b64e, | |
36 | }; | |
37 | ||
8b3d6663 AB |
38 | struct spu_context_ops; |
39 | ||
8837d921 | 40 | #define SPU_CONTEXT_PREEMPT 0UL |
2a911f0b | 41 | |
6263203e AB |
42 | struct spu_gang; |
43 | ||
67207b96 AB |
44 | struct spu_context { |
45 | struct spu *spu; /* pointer to a physical SPU */ | |
5473af04 | 46 | struct spu_state csa; /* SPU context save area. */ |
67207b96 | 47 | spinlock_t mmio_lock; /* protects mmio access */ |
6df10a82 MN |
48 | struct address_space *local_store; /* local store mapping. */ |
49 | struct address_space *mfc; /* 'mfc' area mappings. */ | |
50 | struct address_space *cntl; /* 'control' area mappings. */ | |
51 | struct address_space *signal1; /* 'signal1' area mappings. */ | |
52 | struct address_space *signal2; /* 'signal2' area mappings. */ | |
86767277 | 53 | u64 object_id; /* user space pointer for oprofile */ |
8b3d6663 AB |
54 | |
55 | enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state; | |
56 | struct rw_semaphore state_sema; | |
5ef8224a | 57 | struct semaphore run_sema; |
8b3d6663 AB |
58 | |
59 | struct mm_struct *owner; | |
67207b96 AB |
60 | |
61 | struct kref kref; | |
8b3d6663 AB |
62 | wait_queue_head_t ibox_wq; |
63 | wait_queue_head_t wbox_wq; | |
5110459f | 64 | wait_queue_head_t stop_wq; |
a33a7d73 | 65 | wait_queue_head_t mfc_wq; |
8b3d6663 AB |
66 | struct fasync_struct *ibox_fasync; |
67 | struct fasync_struct *wbox_fasync; | |
a33a7d73 AB |
68 | struct fasync_struct *mfc_fasync; |
69 | u32 tagwait; | |
8b3d6663 | 70 | struct spu_context_ops *ops; |
2a911f0b | 71 | struct work_struct reap_work; |
9add11da AB |
72 | unsigned long flags; |
73 | unsigned long event_return; | |
6263203e AB |
74 | |
75 | struct list_head gang_list; | |
76 | struct spu_gang *gang; | |
77 | }; | |
78 | ||
79 | struct spu_gang { | |
80 | struct list_head list; | |
81 | struct mutex mutex; | |
82 | struct kref kref; | |
83 | int contexts; | |
8b3d6663 AB |
84 | }; |
85 | ||
a33a7d73 AB |
86 | struct mfc_dma_command { |
87 | int32_t pad; /* reserved */ | |
88 | uint32_t lsa; /* local storage address */ | |
89 | uint64_t ea; /* effective address */ | |
90 | uint16_t size; /* transfer size */ | |
91 | uint16_t tag; /* command tag */ | |
92 | uint16_t class; /* class ID */ | |
93 | uint16_t cmd; /* command opcode */ | |
94 | }; | |
95 | ||
96 | ||
8b3d6663 AB |
97 | /* SPU context query/set operations. */ |
98 | struct spu_context_ops { | |
99 | int (*mbox_read) (struct spu_context * ctx, u32 * data); | |
100 | u32(*mbox_stat_read) (struct spu_context * ctx); | |
3a843d7c AB |
101 | unsigned int (*mbox_stat_poll)(struct spu_context *ctx, |
102 | unsigned int events); | |
8b3d6663 AB |
103 | int (*ibox_read) (struct spu_context * ctx, u32 * data); |
104 | int (*wbox_write) (struct spu_context * ctx, u32 data); | |
105 | u32(*signal1_read) (struct spu_context * ctx); | |
106 | void (*signal1_write) (struct spu_context * ctx, u32 data); | |
107 | u32(*signal2_read) (struct spu_context * ctx); | |
108 | void (*signal2_write) (struct spu_context * ctx, u32 data); | |
109 | void (*signal1_type_set) (struct spu_context * ctx, u64 val); | |
110 | u64(*signal1_type_get) (struct spu_context * ctx); | |
111 | void (*signal2_type_set) (struct spu_context * ctx, u64 val); | |
112 | u64(*signal2_type_get) (struct spu_context * ctx); | |
113 | u32(*npc_read) (struct spu_context * ctx); | |
114 | void (*npc_write) (struct spu_context * ctx, u32 data); | |
115 | u32(*status_read) (struct spu_context * ctx); | |
116 | char*(*get_ls) (struct spu_context * ctx); | |
5110459f AB |
117 | void (*runcntl_write) (struct spu_context * ctx, u32 data); |
118 | void (*runcntl_stop) (struct spu_context * ctx); | |
a33a7d73 AB |
119 | int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode); |
120 | u32 (*read_mfc_tagstatus)(struct spu_context * ctx); | |
121 | u32 (*get_mfc_free_elements)(struct spu_context *ctx); | |
122 | int (*send_mfc_command)(struct spu_context *ctx, | |
123 | struct mfc_dma_command *cmd); | |
67207b96 AB |
124 | }; |
125 | ||
8b3d6663 AB |
126 | extern struct spu_context_ops spu_hw_ops; |
127 | extern struct spu_context_ops spu_backing_ops; | |
128 | ||
67207b96 AB |
129 | struct spufs_inode_info { |
130 | struct spu_context *i_ctx; | |
6263203e | 131 | struct spu_gang *i_gang; |
67207b96 AB |
132 | struct inode vfs_inode; |
133 | }; | |
134 | #define SPUFS_I(inode) \ | |
135 | container_of(inode, struct spufs_inode_info, vfs_inode) | |
136 | ||
137 | extern struct tree_descr spufs_dir_contents[]; | |
5737edd1 | 138 | extern struct tree_descr spufs_dir_nosched_contents[]; |
67207b96 AB |
139 | |
140 | /* system call implementation */ | |
141 | long spufs_run_spu(struct file *file, | |
142 | struct spu_context *ctx, u32 *npc, u32 *status); | |
6263203e | 143 | long spufs_create(struct nameidata *nd, |
67207b96 | 144 | unsigned int flags, mode_t mode); |
e80358ad | 145 | extern struct file_operations spufs_context_fops; |
67207b96 | 146 | |
6263203e AB |
147 | /* gang management */ |
148 | struct spu_gang *alloc_spu_gang(void); | |
149 | struct spu_gang *get_spu_gang(struct spu_gang *gang); | |
150 | int put_spu_gang(struct spu_gang *gang); | |
151 | void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx); | |
152 | void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx); | |
153 | ||
67207b96 | 154 | /* context management */ |
6263203e | 155 | struct spu_context * alloc_spu_context(struct spu_gang *gang); |
67207b96 AB |
156 | void destroy_spu_context(struct kref *kref); |
157 | struct spu_context * get_spu_context(struct spu_context *ctx); | |
158 | int put_spu_context(struct spu_context *ctx); | |
5110459f | 159 | void spu_unmap_mappings(struct spu_context *ctx); |
67207b96 | 160 | |
8b3d6663 | 161 | void spu_forget(struct spu_context *ctx); |
67207b96 AB |
162 | void spu_acquire(struct spu_context *ctx); |
163 | void spu_release(struct spu_context *ctx); | |
8b3d6663 | 164 | int spu_acquire_runnable(struct spu_context *ctx); |
67207b96 | 165 | void spu_acquire_saved(struct spu_context *ctx); |
099814bb JK |
166 | int spu_acquire_exclusive(struct spu_context *ctx); |
167 | ||
168 | static inline void spu_release_exclusive(struct spu_context *ctx) | |
169 | { | |
170 | up_write(&ctx->state_sema); | |
171 | } | |
67207b96 | 172 | |
8b3d6663 AB |
173 | int spu_activate(struct spu_context *ctx, u64 flags); |
174 | void spu_deactivate(struct spu_context *ctx); | |
175 | void spu_yield(struct spu_context *ctx); | |
176 | int __init spu_sched_init(void); | |
177 | void __exit spu_sched_exit(void); | |
178 | ||
099814bb | 179 | int spu_recycle_isolated(struct spu_context *ctx); |
ce8ab854 AB |
180 | /* |
181 | * spufs_wait | |
182 | * Same as wait_event_interruptible(), except that here | |
183 | * we need to call spu_release(ctx) before sleeping, and | |
184 | * then spu_acquire(ctx) when awoken. | |
185 | */ | |
186 | ||
187 | #define spufs_wait(wq, condition) \ | |
188 | ({ \ | |
189 | int __ret = 0; \ | |
190 | DEFINE_WAIT(__wait); \ | |
191 | for (;;) { \ | |
192 | prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \ | |
193 | if (condition) \ | |
194 | break; \ | |
195 | if (!signal_pending(current)) { \ | |
196 | spu_release(ctx); \ | |
197 | schedule(); \ | |
198 | spu_acquire(ctx); \ | |
199 | continue; \ | |
200 | } \ | |
201 | __ret = -ERESTARTSYS; \ | |
202 | break; \ | |
203 | } \ | |
204 | finish_wait(&(wq), &__wait); \ | |
205 | __ret; \ | |
206 | }) | |
207 | ||
8b3d6663 AB |
208 | size_t spu_wbox_write(struct spu_context *ctx, u32 data); |
209 | size_t spu_ibox_read(struct spu_context *ctx, u32 *data); | |
210 | ||
211 | /* irq callback funcs. */ | |
212 | void spufs_ibox_callback(struct spu *spu); | |
213 | void spufs_wbox_callback(struct spu *spu); | |
5110459f | 214 | void spufs_stop_callback(struct spu *spu); |
a33a7d73 | 215 | void spufs_mfc_callback(struct spu *spu); |
9add11da | 216 | void spufs_dma_callback(struct spu *spu, int type); |
8b3d6663 | 217 | |
67207b96 | 218 | #endif |