file.c

来自「linux2.6.16版本」· C语言 代码 · 共 795 行 · 第 1/2 页

}

static struct file_operations spufs_ibox_stat_fops = {
	.open	= spufs_pipe_open,
	.read	= spufs_ibox_stat_read,
};

/* low-level mailbox write */
size_t spu_wbox_write(struct spu_context *ctx, u32 data)
{
	return ctx->ops->wbox_write(ctx, data);
}

static int spufs_wbox_fasync(int fd, struct file *file, int on)
{
	struct spu_context *ctx = file->private_data;
	int ret;

	ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);

	return ret;
}

/* interrupt-level wbox callback function. */
void spufs_wbox_callback(struct spu *spu)
{
	struct spu_context *ctx = spu->ctx;

	wake_up_all(&ctx->wbox_wq);
	kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
}

static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
			size_t len, loff_t *pos)
{
	struct spu_context *ctx = file->private_data;
	u32 wbox_data;
	int ret;

	if (len < 4)
		return -EINVAL;

	if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
		return -EFAULT;

	spu_acquire(ctx);

	ret = 0;
	if (file->f_flags & O_NONBLOCK) {
		if (!spu_wbox_write(ctx, wbox_data))
			ret = -EAGAIN;
	} else {
		ret = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
	}

	spu_release(ctx);

	return ret ? ret : sizeof wbox_data;
}

static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
{
	struct spu_context *ctx = file->private_data;
	unsigned int mask;

	poll_wait(file, &ctx->wbox_wq, wait);

	spu_acquire(ctx);
	mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
	spu_release(ctx);

	return mask;
}

static struct file_operations spufs_wbox_fops = {
	.open	= spufs_pipe_open,
	.write	= spufs_wbox_write,
	.poll	= spufs_wbox_poll,
	.fasync	= spufs_wbox_fasync,
};

static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
			size_t len, loff_t *pos)
{
	struct spu_context *ctx = file->private_data;
	u32 wbox_stat;

	if (len < 4)
		return -EINVAL;

	spu_acquire(ctx);
	wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff;
	spu_release(ctx);

	if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat))
		return -EFAULT;

	return 4;
}

static struct file_operations spufs_wbox_stat_fops = {
	.open	= spufs_pipe_open,
	.read	= spufs_wbox_stat_read,
};

static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
			size_t len, loff_t *pos)
{
	struct spu_context *ctx = file->private_data;
	u32 data;

	if (len < 4)
		return -EINVAL;

	spu_acquire(ctx);
	data = ctx->ops->signal1_read(ctx);
	spu_release(ctx);

	if (copy_to_user(buf, &data, 4))
		return -EFAULT;

	return 4;
}

static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
			size_t len, loff_t *pos)
{
	struct spu_context *ctx;
	u32 data;

	ctx = file->private_data;

	if (len < 4)
		return -EINVAL;

	if (copy_from_user(&data, buf, 4))
		return -EFAULT;

	spu_acquire(ctx);
	ctx->ops->signal1_write(ctx, data);
	spu_release(ctx);

	return 4;
}

static struct file_operations spufs_signal1_fops = {
	.open = spufs_pipe_open,
	.read = spufs_signal1_read,
	.write = spufs_signal1_write,
};

static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
			size_t len, loff_t *pos)
{
	struct spu_context *ctx;
	u32 data;

	ctx = file->private_data;

	if (len < 4)
		return -EINVAL;

	spu_acquire(ctx);
	data = ctx->ops->signal2_read(ctx);
	spu_release(ctx);

	if (copy_to_user(buf, &data, 4))
		return -EFAULT;

	return 4;
}

static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
			size_t len, loff_t *pos)
{
	struct spu_context *ctx;
	u32 data;

	ctx = file->private_data;

	if (len < 4)
		return -EINVAL;

	if (copy_from_user(&data, buf, 4))
		return -EFAULT;

	spu_acquire(ctx);
	ctx->ops->signal2_write(ctx, data);
	spu_release(ctx);

	return 4;
}

static struct file_operations spufs_signal2_fops = {
	.open = spufs_pipe_open,
	.read = spufs_signal2_read,
	.write = spufs_signal2_write,
};

static void spufs_signal1_type_set(void *data, u64 val)
{
	struct spu_context *ctx = data;

	spu_acquire(ctx);
	ctx->ops->signal1_type_set(ctx, val);
	spu_release(ctx);
}

static u64 spufs_signal1_type_get(void *data)
{
	struct spu_context *ctx = data;
	u64 ret;

	spu_acquire(ctx);
	ret = ctx->ops->signal1_type_get(ctx);
	spu_release(ctx);

	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
					spufs_signal1_type_set, "%llu");

static void spufs_signal2_type_set(void *data, u64 val)
{
	struct spu_context *ctx = data;

	spu_acquire(ctx);
	ctx->ops->signal2_type_set(ctx, val);
	spu_release(ctx);
}

static u64 spufs_signal2_type_get(void *data)
{
	struct spu_context *ctx = data;
	u64 ret;

	spu_acquire(ctx);
	ret = ctx->ops->signal2_type_get(ctx);
	spu_release(ctx);

	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
					spufs_signal2_type_set, "%llu");

static void spufs_npc_set(void *data, u64 val)
{
	struct spu_context *ctx = data;
	spu_acquire(ctx);
	ctx->ops->npc_write(ctx, val);
	spu_release(ctx);
}

static u64 spufs_npc_get(void *data)
{
	struct spu_context *ctx = data;
	u64 ret;
	spu_acquire(ctx);
	ret = ctx->ops->npc_read(ctx);
	spu_release(ctx);
	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n")

static void spufs_decr_set(void *data, u64 val)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	spu_acquire_saved(ctx);
	lscsa->decr.slot[0] = (u32) val;
	spu_release(ctx);
}

static u64 spufs_decr_get(void *data)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	u64 ret;
	spu_acquire_saved(ctx);
	ret = lscsa->decr.slot[0];
	spu_release(ctx);
	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
			"%llx\n")

static void spufs_decr_status_set(void *data, u64 val)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	spu_acquire_saved(ctx);
	lscsa->decr_status.slot[0] = (u32) val;
	spu_release(ctx);
}

static u64 spufs_decr_status_get(void *data)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	u64 ret;
	spu_acquire_saved(ctx);
	ret = lscsa->decr_status.slot[0];
	spu_release(ctx);
	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
			spufs_decr_status_set, "%llx\n")

static void spufs_spu_tag_mask_set(void *data, u64 val)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	spu_acquire_saved(ctx);
	lscsa->tag_mask.slot[0] = (u32) val;
	spu_release(ctx);
}

static u64 spufs_spu_tag_mask_get(void *data)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	u64 ret;
	spu_acquire_saved(ctx);
	ret = lscsa->tag_mask.slot[0];
	spu_release(ctx);
	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_spu_tag_mask_ops, spufs_spu_tag_mask_get,
			spufs_spu_tag_mask_set, "%llx\n")

static void spufs_event_mask_set(void *data, u64 val)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	spu_acquire_saved(ctx);
	lscsa->event_mask.slot[0] = (u32) val;
	spu_release(ctx);
}

static u64 spufs_event_mask_get(void *data)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	u64 ret;
	spu_acquire_saved(ctx);
	ret = lscsa->event_mask.slot[0];
	spu_release(ctx);
	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
			spufs_event_mask_set, "%llx\n")

static void spufs_srr0_set(void *data, u64 val)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	spu_acquire_saved(ctx);
	lscsa->srr0.slot[0] = (u32) val;
	spu_release(ctx);
}

static u64 spufs_srr0_get(void *data)
{
	struct spu_context *ctx = data;
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	u64 ret;
	spu_acquire_saved(ctx);
	ret = lscsa->srr0.slot[0];
	spu_release(ctx);
	return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
			"%llx\n")

struct tree_descr spufs_dir_contents[] = {
	{ "mem",  &spufs_mem_fops,  0666, },
	{ "regs", &spufs_regs_fops,  0666, },
	{ "mbox", &spufs_mbox_fops, 0444, },
	{ "ibox", &spufs_ibox_fops, 0444, },
	{ "wbox", &spufs_wbox_fops, 0222, },
	{ "mbox_stat", &spufs_mbox_stat_fops, 0444, },
	{ "ibox_stat", &spufs_ibox_stat_fops, 0444, },
	{ "wbox_stat", &spufs_wbox_stat_fops, 0444, },
	{ "signal1", &spufs_signal1_fops, 0666, },
	{ "signal2", &spufs_signal2_fops, 0666, },
	{ "signal1_type", &spufs_signal1_type, 0666, },
	{ "signal2_type", &spufs_signal2_type, 0666, },
	{ "npc", &spufs_npc_ops, 0666, },
	{ "fpcr", &spufs_fpcr_fops, 0666, },
	{ "decr", &spufs_decr_ops, 0666, },
	{ "decr_status", &spufs_decr_status_ops, 0666, },
	{ "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
	{ "event_mask", &spufs_event_mask_ops, 0666, },
	{ "srr0", &spufs_srr0_ops, 0666, },
	{},
};