static int rapl_read_data_raw()

in intel_rapl_common.c [745:789]

• 34 lines of code
• 9 McCabe index (conditional complexity)

static int rapl_read_data_raw(struct rapl_domain *rd,
			      enum rapl_primitives prim, bool xlate, u64 *data)
{
	u64 value;
	enum rapl_primitives prim_fixed = prim_fixups(rd, prim);
	struct rapl_primitive_info *rp = &rpi[prim_fixed];
	struct reg_action ra;
	int cpu;

	if (!rp->name || rp->flag & RAPL_PRIMITIVE_DUMMY)
		return -EINVAL;

	ra.reg = rd->regs[rp->id];
	if (!ra.reg)
		return -EINVAL;

	cpu = rd->rp->lead_cpu;

	/* domain with 2 limits has different bit */
	if (prim == FW_LOCK && rd->rp->priv->limits[rd->id] == 2) {
		rp->mask = POWER_HIGH_LOCK;
		rp->shift = 63;
	}
	/* non-hardware data are collected by the polling thread */
	if (rp->flag & RAPL_PRIMITIVE_DERIVED) {
		*data = rd->rdd.primitives[prim];
		return 0;
	}

	ra.mask = rp->mask;

	if (rd->rp->priv->read_raw(cpu, &ra)) {
		pr_debug("failed to read reg 0x%llx on cpu %d\n", ra.reg, cpu);
		return -EIO;
	}

	value = ra.value >> rp->shift;

	if (xlate)
		*data = rapl_unit_xlate(rd, rp->unit, value, 0);
	else
		*data = value;

	return 0;
}