file.c

linux 内核源代码

		ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
	else
		ctx->csa.priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
	spu_release_saved(ctx);
}

static u64 spufs_decr_status_get(struct spu_context *ctx)
{
	if (ctx->csa.priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING)
		return SPU_DECR_STATUS_RUNNING;
	else
		return 0;
}
DEFINE_SPUFS_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
		       spufs_decr_status_set, "0x%llx\n",
		       SPU_ATTR_ACQUIRE_SAVED);

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_saved(ctx);
}

static u64 spufs_event_mask_get(struct spu_context *ctx)
{
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	return lscsa->event_mask.slot[0];
}

DEFINE_SPUFS_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
		       spufs_event_mask_set, "0x%llx\n",
		       SPU_ATTR_ACQUIRE_SAVED);

static u64 spufs_event_status_get(struct spu_context *ctx)
{
	struct spu_state *state = &ctx->csa;
	u64 stat;
	stat = state->spu_chnlcnt_RW[0];
	if (stat)
		return state->spu_chnldata_RW[0];
	return 0;
}
DEFINE_SPUFS_ATTRIBUTE(spufs_event_status_ops, spufs_event_status_get,
		       NULL, "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)

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_saved(ctx);
}

static u64 spufs_srr0_get(struct spu_context *ctx)
{
	struct spu_lscsa *lscsa = ctx->csa.lscsa;
	return lscsa->srr0.slot[0];
}
DEFINE_SPUFS_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
		       "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)

static u64 spufs_id_get(struct spu_context *ctx)
{
	u64 num;

	if (ctx->state == SPU_STATE_RUNNABLE)
		num = ctx->spu->number;
	else
		num = (unsigned int)-1;

	return num;
}
DEFINE_SPUFS_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n",
		       SPU_ATTR_ACQUIRE)

static u64 spufs_object_id_get(struct spu_context *ctx)
{
	/* FIXME: Should there really be no locking here? */
	return ctx->object_id;
}

static void spufs_object_id_set(void *data, u64 id)
{
	struct spu_context *ctx = data;
	ctx->object_id = id;
}

DEFINE_SPUFS_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
		       spufs_object_id_set, "0x%llx\n", SPU_ATTR_NOACQUIRE);

static u64 spufs_lslr_get(struct spu_context *ctx)
{
	return ctx->csa.priv2.spu_lslr_RW;
}
DEFINE_SPUFS_ATTRIBUTE(spufs_lslr_ops, spufs_lslr_get, NULL, "0x%llx\n",
		       SPU_ATTR_ACQUIRE_SAVED);

static int spufs_info_open(struct inode *inode, struct file *file)
{
	struct spufs_inode_info *i = SPUFS_I(inode);
	struct spu_context *ctx = i->i_ctx;
	file->private_data = ctx;
	return 0;
}

static int spufs_caps_show(struct seq_file *s, void *private)
{
	struct spu_context *ctx = s->private;

	if (!(ctx->flags & SPU_CREATE_NOSCHED))
		seq_puts(s, "sched\n");
	if (!(ctx->flags & SPU_CREATE_ISOLATE))
		seq_puts(s, "step\n");
	return 0;
}

static int spufs_caps_open(struct inode *inode, struct file *file)
{
	return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx);
}

static const struct file_operations spufs_caps_fops = {
	.open		= spufs_caps_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

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

	mbox_stat = ctx->csa.prob.mb_stat_R;
	if (mbox_stat & 0x0000ff) {
		data = ctx->csa.prob.pu_mb_R;
	}

	return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
}

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

	if (!access_ok(VERIFY_WRITE, buf, len))
		return -EFAULT;

	spu_acquire_saved(ctx);
	spin_lock(&ctx->csa.register_lock);
	ret = __spufs_mbox_info_read(ctx, buf, len, pos);
	spin_unlock(&ctx->csa.register_lock);
	spu_release_saved(ctx);

	return ret;
}

static const struct file_operations spufs_mbox_info_fops = {
	.open = spufs_info_open,
	.read = spufs_mbox_info_read,
	.llseek  = generic_file_llseek,
};

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

	ibox_stat = ctx->csa.prob.mb_stat_R;
	if (ibox_stat & 0xff0000) {
		data = ctx->csa.priv2.puint_mb_R;
	}

	return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
}

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

	if (!access_ok(VERIFY_WRITE, buf, len))
		return -EFAULT;

	spu_acquire_saved(ctx);
	spin_lock(&ctx->csa.register_lock);
	ret = __spufs_ibox_info_read(ctx, buf, len, pos);
	spin_unlock(&ctx->csa.register_lock);
	spu_release_saved(ctx);

	return ret;
}

static const struct file_operations spufs_ibox_info_fops = {
	.open = spufs_info_open,
	.read = spufs_ibox_info_read,
	.llseek  = generic_file_llseek,
};

static ssize_t __spufs_wbox_info_read(struct spu_context *ctx,
			char __user *buf, size_t len, loff_t *pos)
{
	int i, cnt;
	u32 data[4];
	u32 wbox_stat;

	wbox_stat = ctx->csa.prob.mb_stat_R;
	cnt = 4 - ((wbox_stat & 0x00ff00) >> 8);
	for (i = 0; i < cnt; i++) {
		data[i] = ctx->csa.spu_mailbox_data[i];
	}

	return simple_read_from_buffer(buf, len, pos, &data,
				cnt * sizeof(u32));
}

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

	if (!access_ok(VERIFY_WRITE, buf, len))
		return -EFAULT;

	spu_acquire_saved(ctx);
	spin_lock(&ctx->csa.register_lock);
	ret = __spufs_wbox_info_read(ctx, buf, len, pos);
	spin_unlock(&ctx->csa.register_lock);
	spu_release_saved(ctx);

	return ret;
}

static const struct file_operations spufs_wbox_info_fops = {
	.open = spufs_info_open,
	.read = spufs_wbox_info_read,
	.llseek  = generic_file_llseek,
};

static ssize_t __spufs_dma_info_read(struct spu_context *ctx,
			char __user *buf, size_t len, loff_t *pos)
{
	struct spu_dma_info info;
	struct mfc_cq_sr *qp, *spuqp;
	int i;

	info.dma_info_type = ctx->csa.priv2.spu_tag_status_query_RW;
	info.dma_info_mask = ctx->csa.lscsa->tag_mask.slot[0];
	info.dma_info_status = ctx->csa.spu_chnldata_RW[24];
	info.dma_info_stall_and_notify = ctx->csa.spu_chnldata_RW[25];
	info.dma_info_atomic_command_status = ctx->csa.spu_chnldata_RW[27];
	for (i = 0; i < 16; i++) {
		qp = &info.dma_info_command_data[i];
		spuqp = &ctx->csa.priv2.spuq[i];

		qp->mfc_cq_data0_RW = spuqp->mfc_cq_data0_RW;
		qp->mfc_cq_data1_RW = spuqp->mfc_cq_data1_RW;
		qp->mfc_cq_data2_RW = spuqp->mfc_cq_data2_RW;
		qp->mfc_cq_data3_RW = spuqp->mfc_cq_data3_RW;
	}

	return simple_read_from_buffer(buf, len, pos, &info,
				sizeof info);
}

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

	if (!access_ok(VERIFY_WRITE, buf, len))
		return -EFAULT;

	spu_acquire_saved(ctx);
	spin_lock(&ctx->csa.register_lock);
	ret = __spufs_dma_info_read(ctx, buf, len, pos);
	spin_unlock(&ctx->csa.register_lock);
	spu_release_saved(ctx);

	return ret;
}

static const struct file_operations spufs_dma_info_fops = {
	.open = spufs_info_open,
	.read = spufs_dma_info_read,
};

static ssize_t __spufs_proxydma_info_read(struct spu_context *ctx,
			char __user *buf, size_t len, loff_t *pos)
{
	struct spu_proxydma_info info;
	struct mfc_cq_sr *qp, *puqp;
	int ret = sizeof info;
	int i;

	if (len < ret)
		return -EINVAL;

	if (!access_ok(VERIFY_WRITE, buf, len))
		return -EFAULT;

	info.proxydma_info_type = ctx->csa.prob.dma_querytype_RW;
	info.proxydma_info_mask = ctx->csa.prob.dma_querymask_RW;
	info.proxydma_info_status = ctx->csa.prob.dma_tagstatus_R;
	for (i = 0; i < 8; i++) {
		qp = &info.proxydma_info_command_data[i];
		puqp = &ctx->csa.priv2.puq[i];

		qp->mfc_cq_data0_RW = puqp->mfc_cq_data0_RW;
		qp->mfc_cq_data1_RW = puqp->mfc_cq_data1_RW;
		qp->mfc_cq_data2_RW = puqp->mfc_cq_data2_RW;
		qp->mfc_cq_data3_RW = puqp->mfc_cq_data3_RW;
	}

	return simple_read_from_buffer(buf, len, pos, &info,
				sizeof info);
}

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

	spu_acquire_saved(ctx);
	spin_lock(&ctx->csa.register_lock);
	ret = __spufs_proxydma_info_read(ctx, buf, len, pos);
	spin_unlock(&ctx->csa.register_lock);
	spu_release_saved(ctx);

	return ret;
}

static const struct file_operations spufs_proxydma_info_fops = {
	.open = spufs_info_open,
	.read = spufs_proxydma_info_read,
};

static int spufs_show_tid(struct seq_file *s, void *private)
{
	struct spu_context *ctx = s->private;

	seq_printf(s, "%d\n", ctx->tid);
	return 0;
}

static int spufs_tid_open(struct inode *inode, struct file *file)
{
	return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx);
}

static const struct file_operations spufs_tid_fops = {
	.open		= spufs_tid_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static const char *ctx_state_names[] = {
	"user", "system", "iowait", "loaded"
};

static unsigned long long spufs_acct_time(struct spu_context *ctx,
		enum spu_utilization_state state)
{
	struct timespec ts;
	unsigned long long time = ctx->stats.times[state];

	/*
	 * In general, utilization statistics are updated by the controlling
	 * thread as the spu context moves through various well defined
	 * state transitions, but if the context is lazily loaded its
	 * utilization statistics are not updated as the controlling thread
	 * is not tightly coupled with the execution of the spu context.  We
	 * calculate and apply the time delta from the last recorded state
	 * of the spu context.
	 */
	if (ctx->spu && ctx->stats.util_state == state) {
		ktime_get_ts(&ts);
		time += timespec_to_ns(&ts) - ctx->stats.tstamp;
	}

	return time / NSEC_PER_MSEC;
}

static unsigned long long spufs_slb_flts(struct spu_context *ctx)
{
	unsigned long long slb_flts = ctx->stats.slb_flt;

	if (ctx->state == SPU_STATE_RUNNABLE) {
		slb_flts += (ctx->spu->stats.slb_flt -
			     ctx->stats.slb_flt_base);
	}

	return slb_flts;
}

static unsigned long long spufs_class2_intrs(struct spu_context *ctx)
{
	unsigned long long class2_intrs = ctx->stats.class2_intr;

	if (ctx->state == SPU_STATE_RUNNABLE) {
		class2_intrs += (ctx->spu->stats.class2_intr -
				 ctx->stats.class2_intr_base);
	}

	return class2_intrs;
}


static int spufs_show_stat(struct seq_file *s, void *private)
{
	struct spu_context *ctx = s->private;

	spu_acquire(ctx);
	seq_printf(s, "%s %llu %llu %llu %llu "
		      "%llu %llu %llu %llu %llu %llu %llu %llu\n",
		ctx_state_names[ctx->stats.util_state],
		spufs_acct_time(ctx, SPU_UTIL_USER),
		spufs_acct_time(ctx, SPU_UTIL_SYSTEM),
		spufs_acct_time(ctx, SPU_UTIL_IOWAIT),
		spufs_acct_time(ctx, SPU_UTIL_IDLE_LOADED),
		ctx->stats.vol_ctx_switch,
		ctx->stats.invol_ctx_switch,
		spufs_slb_flts(ctx),
		ctx->stats.hash_flt,
		ctx->stats.min_flt,
		ctx->stats.maj_flt,
		spufs_class2_intrs(ctx),
		ctx->stats.libassist);
	spu_release(ctx);
	return 0;
}

static int spufs_stat_open(struct inode *inode, struct file *file)
{
	return single_open(file, spufs_show_stat, SPUFS_I(inode)->i_ctx);
}

static const struct file_operations spufs_stat_fops = {
	.open		= spufs_stat_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};


struct tree_descr spufs_dir_contents[] = {
	{ "capabilities", &spufs_caps_fops, 0444, },
	{ "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, },
	{ "cntl", &spufs_cntl_fops,  0666, },
	{ "fpcr", &spufs_fpcr_fops, 0666, },
	{ "lslr", &spufs_lslr_ops, 0444, },
	{ "mfc", &spufs_mfc_fops, 0666, },
	{ "mss", &spufs_mss_fops, 0666, },
	{ "npc", &spufs_npc_ops, 0666, },
	{ "srr0", &spufs_srr0_ops, 0666, },
	{ "decr", &spufs_decr_ops, 0666, },
	{ "decr_status", &spufs_decr_status_ops, 0666, },
	{ "event_mask", &spufs_event_mask_ops, 0666, },
	{ "event_status", &spufs_event_status_ops, 0444, },
	{ "psmap", &spufs_psmap_fops, 0666, },
	{ "phys-id", &spufs_id_ops, 0666, },
	{ "object-id", &spufs_object_id_ops, 0666, },
	{ "mbox_info", &spufs_mbox_info_fops, 0444, },
	{ "ibox_info", &spufs_ibox_info_fops, 0444, },
	{ "wbox_info", &spufs_wbox_info_fops, 0444, },
	{ "dma_info", &spufs_dma_info_fops, 0444, },
	{ "proxydma_info", &spufs_proxydma_info_fops, 0444, },
	{ "tid", &spufs_tid_fops, 0444, },
	{ "stat", &spufs_stat_fops, 0444, },
	{},
};

struct tree_descr spufs_dir_nosched_contents[] = {
	{ "capabilities", &spufs_caps_fops, 0444, },
	{ "mem",  &spufs_mem_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_nosched_fops, 0222, },
	{ "signal2", &spufs_signal2_nosched_fops, 0222, },
	{ "signal1_type", &spufs_signal1_type, 0666, },
	{ "signal2_type", &spufs_signal2_type, 0666, },
	{ "mss", &spufs_mss_fops, 0666, },
	{ "mfc", &spufs_mfc_fops, 0666, },
	{ "cntl", &spufs_cntl_fops,  0666, },
	{ "npc", &spufs_npc_ops, 0666, },
	{ "psmap", &spufs_psmap_fops, 0666, },
	{ "phys-id", &spufs_id_ops, 0666, },
	{ "object-id", &spufs_object_id_ops, 0666, },
	{ "tid", &spufs_tid_fops, 0444, },
	{ "stat", &spufs_stat_fops, 0444, },
	{},
};

struct spufs_coredump_reader spufs_coredump_read[] = {
	{ "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])},
	{ "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) },
	{ "lslr", NULL, spufs_lslr_get, 19 },
	{ "decr", NULL, spufs_decr_get, 19 },
	{ "decr_status", NULL, spufs_decr_status_get, 19 },
	{ "mem", __spufs_mem_read, NULL, LS_SIZE, },
	{ "signal1", __spufs_signal1_read, NULL, sizeof(u32) },
	{ "signal1_type", NULL, spufs_signal1_type_get, 19 },
	{ "signal2", __spufs_signal2_read, NULL, sizeof(u32) },
	{ "signal2_type", NULL, spufs_signal2_type_get, 19 },
	{ "event_mask", NULL, spufs_event_mask_get, 19 },
	{ "event_status", NULL, spufs_event_status_get, 19 },
	{ "mbox_info", __spufs_mbox_info_read, NULL, sizeof(u32) },
	{ "ibox_info", __spufs_ibox_info_read, NULL, sizeof(u32) },
	{ "wbox_info", __spufs_wbox_info_read, NULL, 4 * sizeof(u32)},
	{ "dma_info", __spufs_dma_info_read, NULL, sizeof(struct spu_dma_info)},
	{ "proxydma_info", __spufs_proxydma_info_read,
			   NULL, sizeof(struct spu_proxydma_info)},
	{ "object-id", NULL, spufs_object_id_get, 19 },
	{ "npc", NULL, spufs_npc_get, 19 },
	{ NULL },
};