Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 276 insertions, 0 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c
new file mode 100644
index 000000000..099b63d67
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2015-2017 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below.  You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      1. Redistributions of source code must retain the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer.
+ *
+ *      2. Redistributions in binary form must reproduce the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer in the documentation and/or other materials
+ *         provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include <linux/rtnetlink.h>
+
+#include "nfp_net.h"
+
+static struct dentry *nfp_dir;
+
+static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data)
+{
+	struct nfp_net_r_vector *r_vec = file->private;
+	struct nfp_net_rx_ring *rx_ring;
+	int fl_rd_p, fl_wr_p, rxd_cnt;
+	struct nfp_net_rx_desc *rxd;
+	struct nfp_net *nn;
+	void *frag;
+	int i;
+
+	rtnl_lock();
+
+	if (!r_vec->nfp_net || !r_vec->rx_ring)
+		goto out;
+	nn = r_vec->nfp_net;
+	rx_ring = r_vec->rx_ring;
+	if (!nfp_net_running(nn))
+		goto out;
+
+	rxd_cnt = rx_ring->cnt;
+
+	fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl);
+	fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl);
+
+	seq_printf(file, "RX[%02d,%02d]: cnt=%u dma=%pad host=%p   H_RD=%u H_WR=%u FL_RD=%u FL_WR=%u\n",
+		   rx_ring->idx, rx_ring->fl_qcidx,
+		   rx_ring->cnt, &rx_ring->dma, rx_ring->rxds,
+		   rx_ring->rd_p, rx_ring->wr_p, fl_rd_p, fl_wr_p);
+
+	for (i = 0; i < rxd_cnt; i++) {
+		rxd = &rx_ring->rxds[i];
+		seq_printf(file, "%04d: 0x%08x 0x%08x", i,
+			   rxd->vals[0], rxd->vals[1]);
+
+		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);
+
+		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;
+}
+
+static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f)
+{
+	return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private);
+}
+
+static const struct file_operations nfp_rx_q_fops = {
+	.owner = THIS_MODULE,
+	.open = nfp_net_debugfs_rx_q_open,
+	.release = single_release,
+	.read = seq_read,
+	.llseek = seq_lseek
+};
+
+static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f);
+
+static const struct file_operations nfp_tx_q_fops = {
+	.owner = THIS_MODULE,
+	.open = nfp_net_debugfs_tx_q_open,
+	.release = single_release,
+	.read = seq_read,
+	.llseek = seq_lseek
+};
+
+static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data)
+{
+	struct nfp_net_r_vector *r_vec = file->private;
+	struct nfp_net_tx_ring *tx_ring;
+	struct nfp_net_tx_desc *txd;
+	int d_rd_p, d_wr_p, txd_cnt;
+	struct nfp_net *nn;
+	int i;
+
+	rtnl_lock();
+
+	if (debugfs_real_fops(file->file) == &nfp_tx_q_fops)
+		tx_ring = r_vec->tx_ring;
+	else
+		tx_ring = r_vec->xdp_ring;
+	if (!r_vec->nfp_net || !tx_ring)
+		goto out;
+	nn = r_vec->nfp_net;
+	if (!nfp_net_running(nn))
+		goto out;
+
+	txd_cnt = tx_ring->cnt;
+
+	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\n",
+		   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);
+
+	for (i = 0; i < txd_cnt; i++) {
+		txd = &tx_ring->txds[i];
+		seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i,
+			   txd->vals[0], txd->vals[1],
+			   txd->vals[2], txd->vals[3]);
+
+		if (tx_ring == r_vec->tx_ring) {
+			struct sk_buff *skb = READ_ONCE(tx_ring->txbufs[i].skb);
+
+			if (skb)
+				seq_printf(file, " skb->head=%p skb->data=%p",
+					   skb->head, skb->data);
+		} else {
+			seq_printf(file, " frag=%p",
+				   READ_ONCE(tx_ring->txbufs[i].frag));
+		}
+
+		if (tx_ring->txbufs[i].dma_addr)
+			seq_printf(file, " dma_addr=%pad",
+				   &tx_ring->txbufs[i].dma_addr);
+
+		if (i == tx_ring->rd_p % txd_cnt)
+			seq_puts(file, " H_RD");
+		if (i == tx_ring->wr_p % txd_cnt)
+			seq_puts(file, " H_WR");
+		if (i == d_rd_p % txd_cnt)
+			seq_puts(file, " D_RD");
+		if (i == d_wr_p % txd_cnt)
+			seq_puts(file, " D_WR");
+
+		seq_putc(file, '\n');
+	}
+out:
+	rtnl_unlock();
+	return 0;
+}
+
+static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f)
+{
+	return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private);
+}
+
+static const struct file_operations nfp_xdp_q_fops = {
+	.owner = THIS_MODULE,
+	.open = nfp_net_debugfs_tx_q_open,
+	.release = single_release,
+	.read = seq_read,
+	.llseek = seq_lseek
+};
+
+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))
+		return;
+
+	if (nfp_net_is_data_vnic(nn))
+		sprintf(name, "vnic%d", nn->id);
+	else
+		strcpy(name, "ctrl-vnic");
+	nn->debugfs_dir = debugfs_create_dir(name, ddir);
+	if (IS_ERR_OR_NULL(nn->debugfs_dir))
+		return;
+
+	/* Create queue debugging sub-tree */
+	queues = debugfs_create_dir("queue", nn->debugfs_dir);
+	if (IS_ERR_OR_NULL(queues))
+		return;
+
+	rx = debugfs_create_dir("rx", queues);
+	tx = debugfs_create_dir("tx", queues);
+	xdp = debugfs_create_dir("xdp", queues);
+	if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx) || IS_ERR_OR_NULL(xdp))
+		return;
+
+	for (i = 0; i < min(nn->max_rx_rings, nn->max_r_vecs); i++) {
+		sprintf(name, "%d", i);
+		debugfs_create_file(name, 0400, rx,
+				    &nn->r_vecs[i], &nfp_rx_q_fops);
+		debugfs_create_file(name, 0400, xdp,
+				    &nn->r_vecs[i], &nfp_xdp_q_fops);
+	}
+
+	for (i = 0; i < min(nn->max_tx_rings, nn->max_r_vecs); i++) {
+		sprintf(name, "%d", i);
+		debugfs_create_file(name, 0400, tx,
+				    &nn->r_vecs[i], &nfp_tx_q_fops);
+	}
+}
+
+struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
+{
+	struct dentry *dev_dir;
+
+	if (IS_ERR_OR_NULL(nfp_dir))
+		return NULL;
+
+	dev_dir = debugfs_create_dir(pci_name(pdev), nfp_dir);
+	if (IS_ERR_OR_NULL(dev_dir))
+		return NULL;
+
+	return dev_dir;
+}
+
+void nfp_net_debugfs_dir_clean(struct dentry **dir)
+{
+	debugfs_remove_recursive(*dir);
+	*dir = NULL;
+}
+
+void nfp_net_debugfs_create(void)
+{
+	nfp_dir = debugfs_create_dir("nfp_net", NULL);
+}
+
+void nfp_net_debugfs_destroy(void)
+{
+	debugfs_remove_recursive(nfp_dir);
+	nfp_dir = NULL;
+}