drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c
Extension
.c
Size
3133 bytes
Lines
139
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source 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

switch (fq->fq_type) {
		case FQ_TYPE_RX_DEFAULT:
			str = "Rx default";
			break;
		case FQ_TYPE_RX_ERROR:
			str = "Rx error";
			break;
		case FQ_TYPE_RX_PCD:
			str = "Rx PCD";
			break;
		case FQ_TYPE_TX_CONFIRM:
			str = "Tx default confirmation";
			break;
		case FQ_TYPE_TX_CONF_MQ:
			str = "Tx confirmation (mq)";
			break;
		case FQ_TYPE_TX_ERROR:
			str = "Tx error";
			break;
		case FQ_TYPE_TX:
			str = "Tx";
			break;
		default:
			str = "Unknown";
		}

		if (prev && (abs(fq->fqid - prev->fqid) != 1 ||
			     str != prevstr)) {
			if (last_fqid == first_fqid)
				bytes += sprintf(buf + bytes,
					"%s: %d\n", prevstr, prev->fqid);
			else
				bytes += sprintf(buf + bytes,
					"%s: %d - %d\n", prevstr,
					first_fqid, last_fqid);
		}

		if (prev && abs(fq->fqid - prev->fqid) == 1 &&
		    str == prevstr) {
			last_fqid = fq->fqid;
		} else {
			first_fqid = fq->fqid;
			last_fqid = fq->fqid;
		}

		prev = fq;
		prevstr = str;
	}

	if (prev) {
		if (last_fqid == first_fqid)
			bytes += sprintf(buf + bytes, "%s: %d\n", prevstr,
					prev->fqid);
		else
			bytes += sprintf(buf + bytes, "%s: %d - %d\n", prevstr,
					first_fqid, last_fqid);
	}

	return bytes;
}

static ssize_t dpaa_eth_show_bpids(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
	ssize_t bytes = 0;

	bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, "%u\n",
				  priv->dpaa_bp->bpid);

	return bytes;
}

static struct device_attribute dpaa_eth_attrs[] = {
	__ATTR(device_addr, 0444, dpaa_eth_show_addr, NULL),
	__ATTR(fqids, 0444, dpaa_eth_show_fqids, NULL),
	__ATTR(bpids, 0444, dpaa_eth_show_bpids, NULL),
};

void dpaa_eth_sysfs_init(struct device *dev)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
		if (device_create_file(dev, &dpaa_eth_attrs[i])) {
			dev_err(dev, "Error creating sysfs file\n");
			while (i > 0)
				device_remove_file(dev, &dpaa_eth_attrs[--i]);
			return;
		}

Annotation

Implementation Notes