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
45 struct spu
*spu
; /* pointer to a physical SPU */
46 struct spu_state csa
; /* SPU context save area. */
47 spinlock_t mmio_lock
; /* protects mmio access */
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. */
53 u64 object_id
; /* user space pointer for oprofile */
55 enum { SPU_STATE_RUNNABLE
, SPU_STATE_SAVED
} state
;
56 struct rw_semaphore state_sema
;
57 struct semaphore run_sema
;
59 struct mm_struct
*owner
;
62 wait_queue_head_t ibox_wq
;
63 wait_queue_head_t wbox_wq
;
64 wait_queue_head_t stop_wq
;
65 wait_queue_head_t mfc_wq
;
66 struct fasync_struct
*ibox_fasync
;
67 struct fasync_struct
*wbox_fasync
;
68 struct fasync_struct
*mfc_fasync
;
70 struct spu_context_ops
*ops
;
71 struct work_struct reap_work
;
73 unsigned long event_return
;
75 struct list_head gang_list
;
76 struct spu_gang
*gang
;
80 struct list_head list
;
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 */
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
);
101 unsigned int (*mbox_stat_poll
)(struct spu_context
*ctx
,
102 unsigned int events
);
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
);
117 void (*runcntl_write
) (struct spu_context
* ctx
, u32 data
);
118 void (*runcntl_stop
) (struct spu_context
* ctx
);
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
);
126 extern struct spu_context_ops spu_hw_ops
;
127 extern struct spu_context_ops spu_backing_ops
;
129 struct spufs_inode_info
{
130 struct spu_context
*i_ctx
;
131 struct spu_gang
*i_gang
;
132 struct inode vfs_inode
;
134 #define SPUFS_I(inode) \
135 container_of(inode, struct spufs_inode_info, vfs_inode)
137 extern struct tree_descr spufs_dir_contents
[];
139 /* system call implementation */
140 long spufs_run_spu(struct file
*file
,
141 struct spu_context
*ctx
, u32
*npc
, u32
*status
);
142 long spufs_create(struct nameidata
*nd
,
143 unsigned int flags
, mode_t mode
);
144 extern struct file_operations spufs_context_fops
;
146 /* gang management */
147 struct spu_gang
*alloc_spu_gang(void);
148 struct spu_gang
*get_spu_gang(struct spu_gang
*gang
);
149 int put_spu_gang(struct spu_gang
*gang
);
150 void spu_gang_remove_ctx(struct spu_gang
*gang
, struct spu_context
*ctx
);
151 void spu_gang_add_ctx(struct spu_gang
*gang
, struct spu_context
*ctx
);
153 /* context management */
154 struct spu_context
* alloc_spu_context(struct spu_gang
*gang
);
155 void destroy_spu_context(struct kref
*kref
);
156 struct spu_context
* get_spu_context(struct spu_context
*ctx
);
157 int put_spu_context(struct spu_context
*ctx
);
158 void spu_unmap_mappings(struct spu_context
*ctx
);
160 void spu_forget(struct spu_context
*ctx
);
161 void spu_acquire(struct spu_context
*ctx
);
162 void spu_release(struct spu_context
*ctx
);
163 int spu_acquire_runnable(struct spu_context
*ctx
);
164 void spu_acquire_saved(struct spu_context
*ctx
);
166 int spu_activate(struct spu_context
*ctx
, u64 flags
);
167 void spu_deactivate(struct spu_context
*ctx
);
168 void spu_yield(struct spu_context
*ctx
);
169 int __init
spu_sched_init(void);
170 void __exit
spu_sched_exit(void);
174 * Same as wait_event_interruptible(), except that here
175 * we need to call spu_release(ctx) before sleeping, and
176 * then spu_acquire(ctx) when awoken.
179 #define spufs_wait(wq, condition) \
182 DEFINE_WAIT(__wait); \
184 prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
187 if (!signal_pending(current)) { \
193 __ret = -ERESTARTSYS; \
196 finish_wait(&(wq), &__wait); \
200 size_t spu_wbox_write(struct spu_context
*ctx
, u32 data
);
201 size_t spu_ibox_read(struct spu_context
*ctx
, u32
*data
);
203 /* irq callback funcs. */
204 void spufs_ibox_callback(struct spu
*spu
);
205 void spufs_wbox_callback(struct spu
*spu
);
206 void spufs_stop_callback(struct spu
*spu
);
207 void spufs_mfc_callback(struct spu
*spu
);
208 void spufs_dma_callback(struct spu
*spu
, int type
);