drivers/interconnect/qcom/icc-rpmh.c

Source file repositories/reference/linux-study-clean/drivers/interconnect/qcom/icc-rpmh.c

File Facts

System
Linux kernel
Corpus path
drivers/interconnect/qcom/icc-rpmh.c
Extension
.c
Size
9073 bytes
Lines
376
Domain
Driver Families
Bucket
drivers/interconnect
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (tag & BIT(i)) {
			qn->sum_avg[i] += avg_bw;
			qn->max_peak[i] = max_t(u32, qn->max_peak[i], peak_bw);
		}

		if (node->init_avg || node->init_peak) {
			qn->sum_avg[i] = max_t(u64, qn->sum_avg[i], node->init_avg);
			qn->max_peak[i] = max_t(u64, qn->max_peak[i], node->init_peak);
		}
	}

	*agg_avg += avg_bw;
	*agg_peak = max_t(u32, *agg_peak, peak_bw);

	return 0;
}
EXPORT_SYMBOL_GPL(qcom_icc_aggregate);

/**
 * qcom_icc_set - set the constraints based on path
 * @src: source node for the path to set constraints on
 * @dst: destination node for the path to set constraints on
 *
 * Return: 0 on success, or an error code otherwise
 */
int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
{
	struct qcom_icc_provider *qp;
	struct icc_node *node;

	if (!src)
		node = dst;
	else
		node = src;

	qp = to_qcom_provider(node->provider);

	qcom_icc_bcm_voter_commit(qp->voter);

	return 0;
}
EXPORT_SYMBOL_GPL(qcom_icc_set);

/**
 * qcom_icc_bcm_init - populates bcm aux data and connect qnodes
 * @bcm: bcm to be initialized
 * @dev: associated provider device
 *
 * Return: 0 on success, or an error code otherwise
 */
int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev)
{
	struct qcom_icc_node *qn;
	const struct bcm_db *data;
	size_t data_count;
	int i;

	/* BCM is already initialised*/
	if (bcm->addr)
		return 0;

	bcm->addr = cmd_db_read_addr(bcm->name);
	if (!bcm->addr) {
		dev_err(dev, "%s could not find RPMh address\n",
			bcm->name);
		return -EINVAL;
	}

	data = cmd_db_read_aux_data(bcm->name, &data_count);
	if (IS_ERR(data)) {
		dev_err(dev, "%s command db read error (%ld)\n",
			bcm->name, PTR_ERR(data));
		return PTR_ERR(data);
	}
	if (!data_count) {
		dev_err(dev, "%s command db missing or partial aux data\n",
			bcm->name);
		return -EINVAL;
	}

	bcm->aux_data.unit = le32_to_cpu(data->unit);
	bcm->aux_data.width = le16_to_cpu(data->width);
	bcm->aux_data.vcd = data->vcd;
	bcm->aux_data.reserved = data->reserved;
	INIT_LIST_HEAD(&bcm->list);
	INIT_LIST_HEAD(&bcm->ws_list);

	if (!bcm->vote_scale)
		bcm->vote_scale = 1000;

Annotation

Implementation Notes