drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c
Extension
.c
Size
4636 bytes
Lines
187
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

if (!r_vec->xsk_pool) {
			frag = READ_ONCE(rx_ring->rxbufs[i].frag);
			if (frag)
				seq_printf(file, " frag=%p", frag);

			if (rx_ring->rxbufs[i].dma_addr)
				seq_printf(file, " dma_addr=%pad",
					   &rx_ring->rxbufs[i].dma_addr);
		} else {
			if (rx_ring->xsk_rxbufs[i].dma_addr)
				seq_printf(file, " dma_addr=%pad",
					   &rx_ring->xsk_rxbufs[i].dma_addr);
		}

		if (i == rx_ring->rd_p % rxd_cnt)
			seq_puts(file, " H_RD ");
		if (i == rx_ring->wr_p % rxd_cnt)
			seq_puts(file, " H_WR ");
		if (i == fl_rd_p % rxd_cnt)
			seq_puts(file, " FL_RD");
		if (i == fl_wr_p % rxd_cnt)
			seq_puts(file, " FL_WR");

		seq_putc(file, '\n');
	}
out:
	rtnl_unlock();
	return 0;
}
DEFINE_SHOW_ATTRIBUTE(nfp_rx_q);

static int nfp_tx_q_show(struct seq_file *file, void *data);
DEFINE_SHOW_ATTRIBUTE(nfp_tx_q);

static int __nfp_tx_q_show(struct seq_file *file, void *data, bool is_xdp)
{
	struct nfp_net_r_vector *r_vec = file->private;
	struct nfp_net_tx_ring *tx_ring;
	struct nfp_net *nn;
	int d_rd_p, d_wr_p;

	rtnl_lock();

	if (is_xdp)
		tx_ring = r_vec->xdp_ring;
	else
		tx_ring = r_vec->tx_ring;
	if (!r_vec->nfp_net || !tx_ring)
		goto out;
	nn = r_vec->nfp_net;
	if (!nfp_net_running(nn))
		goto out;

	d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q);
	d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q);

	seq_printf(file, "TX[%02d,%02d%s]: cnt=%u dma=%pad host=%p   H_RD=%u H_WR=%u D_RD=%u D_WR=%u",
		   tx_ring->idx, tx_ring->qcidx,
		   tx_ring == r_vec->tx_ring ? "" : "xdp",
		   tx_ring->cnt, &tx_ring->dma, tx_ring->txds,
		   tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p);
	if (tx_ring->txrwb)
		seq_printf(file, " TXRWB=%llu", *tx_ring->txrwb);
	seq_putc(file, '\n');

	nfp_net_debugfs_print_tx_descs(file, &nn->dp, r_vec, tx_ring,
				       d_rd_p, d_wr_p);
out:
	rtnl_unlock();
	return 0;
}

static int nfp_tx_q_show(struct seq_file *file, void *data)
{
	return __nfp_tx_q_show(file, data, false);
}

static int nfp_xdp_q_show(struct seq_file *file, void *data)
{
	return __nfp_tx_q_show(file, data, true);
}
DEFINE_SHOW_ATTRIBUTE(nfp_xdp_q);

void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir)
{
	struct dentry *queues, *tx, *rx, *xdp;
	char name[20];
	int i;

	if (IS_ERR_OR_NULL(nfp_dir))

Annotation

Implementation Notes