projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 67207b96 AB |
1 | #include <linux/file.h> |
| 2 | #include <linux/fs.h> | |
| 3 | #include <linux/module.h> | |
| 4 | #include <linux/mount.h> | |
| 5 | #include <linux/namei.h> | |
| 6 | ||
| 7 | #include <asm/uaccess.h> | |
| 8 | ||
| 9 | #include "spufs.h" | |
| 10 | ||
| 11 | /** | |
| 12 | * sys_spu_run - run code loaded into an SPU | |
| 13 | * | |
| 14 | * @unpc: next program counter for the SPU | |
| 15 | * @ustatus: status of the SPU | |
| 16 | * | |
| 17 | * This system call transfers the control of execution of a | |
| 18 | * user space thread to an SPU. It will return when the | |
| 19 | * SPU has finished executing or when it hits an error | |
| 20 | * condition and it will be interrupted if a signal needs | |
| 21 | * to be delivered to a handler in user space. | |
| 22 | * | |
| 23 | * The next program counter is set to the passed value | |
| 24 | * before the SPU starts fetching code and the user space | |
| 25 | * pointer gets updated with the new value when returning | |
| 26 | * from kernel space. | |
| 27 | * | |
| 28 | * The status value returned from spu_run reflects the | |
| 29 | * value of the spu_status register after the SPU has stopped. | |
| 30 | * | |
| 31 | */ | |
| 32 | long do_spu_run(struct file *filp, __u32 __user *unpc, __u32 __user *ustatus) | |
| 33 | { | |
| 34 | long ret; | |
| 35 | struct spufs_inode_info *i; | |
| 36 | u32 npc, status; | |
| 37 | ||
| 38 | ret = -EFAULT; | |
| 8b3d6663 | 39 | if (get_user(npc, unpc) || get_user(status, ustatus)) |
| 67207b96 AB |
40 | goto out; |
| 41 | ||
| 42 | ret = -EINVAL; | |
| 43 | if (filp->f_vfsmnt->mnt_sb->s_magic != SPUFS_MAGIC) | |
| 44 | goto out; | |
| 45 | ||
| 46 | i = SPUFS_I(filp->f_dentry->d_inode); | |
| 47 | ret = spufs_run_spu(filp, i->i_ctx, &npc, &status); | |
| 48 | ||
| 8b3d6663 | 49 | if (put_user(npc, unpc) || put_user(status, ustatus)) |
| 67207b96 AB |
50 | ret = -EFAULT; |
| 51 | out: | |
| 52 | return ret; | |
| 53 | } | |
| 54 | ||
| 55 | #ifndef MODULE | |
| 56 | asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, __u32 __user *ustatus) | |
| 57 | { | |
| 58 | int fput_needed; | |
| 59 | struct file *filp; | |
| 60 | long ret; | |
| 61 | ||
| 62 | ret = -EBADF; | |
| 63 | filp = fget_light(fd, &fput_needed); | |
| 64 | if (filp) { | |
| 65 | ret = do_spu_run(filp, unpc, ustatus); | |
| 66 | fput_light(filp, fput_needed); | |
| 67 | } | |
| 68 | ||
| 69 | return ret; | |
| 70 | } | |
| 71 | #endif | |
| 72 | ||
| 73 | asmlinkage long sys_spu_create(const char __user *pathname, | |
| 74 | unsigned int flags, mode_t mode) | |
| 75 | { | |
| 76 | char *tmp; | |
| 77 | int ret; | |
| 78 | ||
| 79 | tmp = getname(pathname); | |
| 80 | ret = PTR_ERR(tmp); | |
| 81 | if (!IS_ERR(tmp)) { | |
| 82 | struct nameidata nd; | |
| 83 | ||
| 84 | ret = path_lookup(tmp, LOOKUP_PARENT| | |
| 85 | LOOKUP_OPEN|LOOKUP_CREATE, &nd); | |
| 86 | if (!ret) { | |
| 87 | ret = spufs_create_thread(&nd, pathname, flags, mode); | |
| 88 | path_release(&nd); | |
| 89 | } | |
| 90 | putname(tmp); | |
| 91 | } | |
| 92 | ||
| 93 | return ret; | |
| 94 | } | |
| 95 | ||
| 96 | struct spufs_calls spufs_calls = { | |
| 97 | .create_thread = sys_spu_create, | |
| 98 | .spu_run = do_spu_run, | |
| 99 | .owner = THIS_MODULE, | |
| 100 | }; |