4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
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)
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.
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.
25 #include <linux/kref.h>
26 #include <linux/rwsem.h>
27 #include <linux/spinlock.h>
31 #include <asm/spu_csa.h>
33 /* The magic number for our file system */
35 SPUFS_MAGIC = 0x23c9b64e,
38 struct spu_context_ops;
40 #define SPU_CONTEXT_PREEMPT 0UL
43 struct spu *spu; /* pointer to a physical SPU */
44 struct spu_state csa; /* SPU context save area. */
45 spinlock_t mmio_lock; /* protects mmio access */
46 struct address_space *local_store; /* local store mapping. */
47 struct address_space *mfc; /* 'mfc' area mappings. */
48 struct address_space *cntl; /* 'control' area mappings. */
49 struct address_space *signal1; /* 'signal1' area mappings. */
50 struct address_space *signal2; /* 'signal2' area mappings. */
52 enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
53 struct rw_semaphore state_sema;
54 struct semaphore run_sema;
56 struct mm_struct *owner;
59 wait_queue_head_t ibox_wq;
60 wait_queue_head_t wbox_wq;
61 wait_queue_head_t stop_wq;
62 wait_queue_head_t mfc_wq;
63 struct fasync_struct *ibox_fasync;
64 struct fasync_struct *wbox_fasync;
65 struct fasync_struct *mfc_fasync;
67 struct spu_context_ops *ops;
68 struct work_struct reap_work;
70 unsigned long event_return;
73 struct mfc_dma_command {
74 int32_t pad; /* reserved */
75 uint32_t lsa; /* local storage address */
76 uint64_t ea; /* effective address */
77 uint16_t size; /* transfer size */
78 uint16_t tag; /* command tag */
79 uint16_t class; /* class ID */
80 uint16_t cmd; /* command opcode */
84 /* SPU context query/set operations. */
85 struct spu_context_ops {
86 int (*mbox_read) (struct spu_context * ctx, u32 * data);
87 u32(*mbox_stat_read) (struct spu_context * ctx);
88 unsigned int (*mbox_stat_poll)(struct spu_context *ctx,
90 int (*ibox_read) (struct spu_context * ctx, u32 * data);
91 int (*wbox_write) (struct spu_context * ctx, u32 data);
92 u32(*signal1_read) (struct spu_context * ctx);
93 void (*signal1_write) (struct spu_context * ctx, u32 data);
94 u32(*signal2_read) (struct spu_context * ctx);
95 void (*signal2_write) (struct spu_context * ctx, u32 data);
96 void (*signal1_type_set) (struct spu_context * ctx, u64 val);
97 u64(*signal1_type_get) (struct spu_context * ctx);
98 void (*signal2_type_set) (struct spu_context * ctx, u64 val);
99 u64(*signal2_type_get) (struct spu_context * ctx);
100 u32(*npc_read) (struct spu_context * ctx);
101 void (*npc_write) (struct spu_context * ctx, u32 data);
102 u32(*status_read) (struct spu_context * ctx);
103 char*(*get_ls) (struct spu_context * ctx);
104 void (*runcntl_write) (struct spu_context * ctx, u32 data);
105 void (*runcntl_stop) (struct spu_context * ctx);
106 int (*set_mfc_query)(struct spu_context * ctx, u32 mask, u32 mode);
107 u32 (*read_mfc_tagstatus)(struct spu_context * ctx);
108 u32 (*get_mfc_free_elements)(struct spu_context *ctx);
109 int (*send_mfc_command)(struct spu_context *ctx,
110 struct mfc_dma_command *cmd);
113 extern struct spu_context_ops spu_hw_ops;
114 extern struct spu_context_ops spu_backing_ops;
116 struct spufs_inode_info {
117 struct spu_context *i_ctx;
118 struct inode vfs_inode;
120 #define SPUFS_I(inode) \
121 container_of(inode, struct spufs_inode_info, vfs_inode)
123 extern struct tree_descr spufs_dir_contents[];
125 /* system call implementation */
126 long spufs_run_spu(struct file *file,
127 struct spu_context *ctx, u32 *npc, u32 *status);
128 long spufs_create_thread(struct nameidata *nd,
129 unsigned int flags, mode_t mode);
130 extern struct file_operations spufs_context_fops;
132 /* context management */
133 struct spu_context * alloc_spu_context(void);
134 void destroy_spu_context(struct kref *kref);
135 struct spu_context * get_spu_context(struct spu_context *ctx);
136 int put_spu_context(struct spu_context *ctx);
137 void spu_unmap_mappings(struct spu_context *ctx);
139 void spu_forget(struct spu_context *ctx);
140 void spu_acquire(struct spu_context *ctx);
141 void spu_release(struct spu_context *ctx);
142 int spu_acquire_runnable(struct spu_context *ctx);
143 void spu_acquire_saved(struct spu_context *ctx);
145 int spu_activate(struct spu_context *ctx, u64 flags);
146 void spu_deactivate(struct spu_context *ctx);
147 void spu_yield(struct spu_context *ctx);
148 int __init spu_sched_init(void);
149 void __exit spu_sched_exit(void);
153 * Same as wait_event_interruptible(), except that here
154 * we need to call spu_release(ctx) before sleeping, and
155 * then spu_acquire(ctx) when awoken.
158 #define spufs_wait(wq, condition) \
161 DEFINE_WAIT(__wait); \
163 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
166 if (!signal_pending(current)) { \
172 __ret = -ERESTARTSYS; \
175 finish_wait(&(wq), &__wait); \
179 size_t spu_wbox_write(struct spu_context *ctx, u32 data);
180 size_t spu_ibox_read(struct spu_context *ctx, u32 *data);
182 /* irq callback funcs. */
183 void spufs_ibox_callback(struct spu *spu);
184 void spufs_wbox_callback(struct spu *spu);
185 void spufs_stop_callback(struct spu *spu);
186 void spufs_mfc_callback(struct spu *spu);
187 void spufs_dma_callback(struct spu *spu, int type);