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Subject[PATCH RFC 09/10] dpaa_eth: add debugfs entries
Date
Export per CPU counters through debugfs.

Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com>
---
drivers/net/ethernet/freescale/dpaa/Kconfig | 7 +
drivers/net/ethernet/freescale/dpaa/Makefile | 3 +
drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.c | 273 +++++++++++++++++++++
drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.h | 43 ++++
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 11 +
drivers/net/ethernet/freescale/dpaa/dpaa_eth.h | 4 +
.../net/ethernet/freescale/dpaa/dpaa_eth_common.c | 17 ++
7 files changed, 358 insertions(+)
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.c
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.h

diff --git a/drivers/net/ethernet/freescale/dpaa/Kconfig b/drivers/net/ethernet/freescale/dpaa/Kconfig
index a124639..fc65d71 100644
--- a/drivers/net/ethernet/freescale/dpaa/Kconfig
+++ b/drivers/net/ethernet/freescale/dpaa/Kconfig
@@ -77,4 +77,11 @@ config FSL_DPAA_INGRESS_CS_THRESHOLD
The size in bytes of the ingress tail-drop threshold on FMan ports.
Traffic piling up above this value will be rejected by QMan and discarded by FMan.

+config FSL_DPAA_ETH_DEBUGFS
+ bool "DPAA Ethernet debugfs interface"
+ depends on DEBUG_FS && FSL_DPAA_ETH
+ default y
+ ---help---
+ This option compiles debugfs code for the DPAA Ethernet driver.
+
endif # FSL_DPAA_ETH
diff --git a/drivers/net/ethernet/freescale/dpaa/Makefile b/drivers/net/ethernet/freescale/dpaa/Makefile
index 8a72163..867ec81 100644
--- a/drivers/net/ethernet/freescale/dpaa/Makefile
+++ b/drivers/net/ethernet/freescale/dpaa/Makefile
@@ -11,3 +11,6 @@ ccflags-y += -I$(FMAN)/flib
obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o

fsl_dpa-objs += dpaa_eth.o dpaa_eth_sg.o dpaa_eth_common.o dpaa_ethtool.o dpaa_eth_sysfs.o
+ifeq ($(CONFIG_FSL_DPAA_ETH_DEBUGFS),y)
+fsl_dpa-objs += dpaa_debugfs.o
+endif
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.c b/drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.c
new file mode 100644
index 0000000..ed51ecf
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.c
@@ -0,0 +1,273 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/module.h>
+#include <soc/fsl/qman.h> /* struct qm_mcr_querycgr */
+#include <linux/debugfs.h>
+#include <asm/debug.h>
+#include "dpaa_debugfs.h"
+#include "dpaa_eth.h" /* struct dpa_priv_s, dpa_percpu_priv_s, dpa_bp */
+
+#define DPA_DEBUGFS_DESCRIPTION "FSL DPAA Ethernet debugfs entries"
+#define DPA_ETH_DEBUGFS_ROOT "fsl_dpa"
+
+static int __cold dpa_debugfs_open(struct inode *inode, struct file *file);
+
+static struct dentry *dpa_debugfs_root;
+static const struct file_operations dpa_debugfs_fops = {
+ .open = dpa_debugfs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int dpa_debugfs_show(struct seq_file *file, void *offset)
+{
+ int i;
+ struct dpa_priv_s *priv;
+ struct dpa_percpu_priv_s *percpu_priv, total;
+ struct dpa_bp *dpa_bp;
+ unsigned int dpa_bp_count = 0;
+ unsigned int count_total = 0;
+ struct qm_mcr_querycgr query_cgr;
+
+ BUG_ON(!offset);
+
+ priv = netdev_priv((struct net_device *)file->private);
+
+ dpa_bp = priv->dpa_bp;
+
+ memset(&total, 0, sizeof(total));
+
+ /* "Standard" counters */
+ seq_printf(file, "\nDPA counters for %s:\n", priv->net_dev->name);
+ seq_puts(file, "CPU irqs rx tx recycle ");
+ seq_puts(file, "confirm tx sg tx err rx err bp count\n");
+
+ for_each_online_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+ if (dpa_bp->percpu_count)
+ dpa_bp_count = *(per_cpu_ptr(dpa_bp->percpu_count, i));
+
+ total.in_interrupt += percpu_priv->in_interrupt;
+ total.stats.rx_packets += percpu_priv->stats.rx_packets;
+ total.stats.tx_packets += percpu_priv->stats.tx_packets;
+ total.tx_confirm += percpu_priv->tx_confirm;
+ total.tx_frag_skbuffs += percpu_priv->tx_frag_skbuffs;
+ total.stats.tx_errors += percpu_priv->stats.tx_errors;
+ total.stats.rx_errors += percpu_priv->stats.rx_errors;
+ count_total += dpa_bp_count;
+
+ seq_printf(file, " %hu %8llu %8llu %8llu ",
+ i,
+ percpu_priv->in_interrupt,
+ percpu_priv->stats.rx_packets,
+ percpu_priv->stats.tx_packets);
+ seq_printf(file, "%8llu %8llu %8llu %8llu %8d\n",
+ percpu_priv->tx_confirm,
+ percpu_priv->tx_frag_skbuffs,
+ percpu_priv->stats.tx_errors,
+ percpu_priv->stats.rx_errors,
+ dpa_bp_count);
+ }
+ seq_printf(file, "Total %8llu %8llu %8llu ",
+ total.in_interrupt,
+ total.stats.rx_packets,
+ total.stats.tx_packets);
+ seq_printf(file, "%8llu %8llu %8llu %8llu %8d\n",
+ total.tx_confirm,
+ total.tx_frag_skbuffs,
+ total.stats.tx_errors,
+ total.stats.rx_errors,
+ count_total);
+
+ /* Congestion stats */
+ seq_puts(file, "\nDevice congestion stats:\n");
+ seq_printf(file, "Device has been congested for %d ms.\n",
+ jiffies_to_msecs(priv->cgr_data.congested_jiffies));
+
+ if (qman_query_cgr(&priv->cgr_data.cgr, &query_cgr) != 0) {
+ seq_printf(file, "CGR id %d - failed to query values\n",
+ priv->cgr_data.cgr.cgrid);
+ } else {
+ seq_printf(file, "CGR id %d avg count: %llu\n",
+ priv->cgr_data.cgr.cgrid,
+ qm_mcr_querycgr_a_get64(&query_cgr));
+ seq_printf(file, "Device entered congestion %u times. ",
+ priv->cgr_data.cgr_congested_count);
+ seq_printf(file, "Current congestion state is: %s.\n",
+ query_cgr.cgr.cs ? "congested" : "not congested");
+ /* Reset congestion stats (like QMan CGR API does) */
+ priv->cgr_data.congested_jiffies = 0;
+ priv->cgr_data.cgr_congested_count = 0;
+ }
+
+ /* Rx Errors demultiplexing */
+ seq_puts(file, "\nDPA RX Errors:\nCPU dma err phys err");
+ seq_puts(file, " size err hdr err csum err\n");
+ for_each_online_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+ total.rx_errors.dme += percpu_priv->rx_errors.dme;
+ total.rx_errors.fpe += percpu_priv->rx_errors.fpe;
+ total.rx_errors.fse += percpu_priv->rx_errors.fse;
+ total.rx_errors.phe += percpu_priv->rx_errors.phe;
+
+ seq_printf(file, " %hu %8llu %8llu ",
+ i,
+ percpu_priv->rx_errors.dme,
+ percpu_priv->rx_errors.fpe);
+ seq_printf(file, "%8llu %8llu\n",
+ percpu_priv->rx_errors.fse,
+ percpu_priv->rx_errors.phe);
+ }
+ seq_printf(file, "Total %8llu %8llu %8llu %8llu\n",
+ total.rx_errors.dme,
+ total.rx_errors.fpe,
+ total.rx_errors.fse,
+ total.rx_errors.phe);
+
+ /* ERN demultiplexing */
+ seq_puts(file, "\nDPA ERN counters:\n CPU cg_td wred ");
+ seq_puts(file, "err_cond early_w late_w fq_td fq_ret");
+ seq_puts(file, " orp_z\n");
+ for_each_online_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+ total.ern_cnt.cg_tdrop += percpu_priv->ern_cnt.cg_tdrop;
+ total.ern_cnt.wred += percpu_priv->ern_cnt.wred;
+ total.ern_cnt.err_cond += percpu_priv->ern_cnt.err_cond;
+ total.ern_cnt.early_window += percpu_priv->ern_cnt.early_window;
+ total.ern_cnt.late_window += percpu_priv->ern_cnt.late_window;
+ total.ern_cnt.fq_tdrop += percpu_priv->ern_cnt.fq_tdrop;
+ total.ern_cnt.fq_retired += percpu_priv->ern_cnt.fq_retired;
+ total.ern_cnt.orp_zero += percpu_priv->ern_cnt.orp_zero;
+
+ seq_printf(file, " %hu %8llu %8llu %8llu %8llu ",
+ i,
+ percpu_priv->ern_cnt.cg_tdrop,
+ percpu_priv->ern_cnt.wred,
+ percpu_priv->ern_cnt.err_cond,
+ percpu_priv->ern_cnt.early_window);
+ seq_printf(file, "%8llu %8llu %8llu %8llu\n",
+ percpu_priv->ern_cnt.late_window,
+ percpu_priv->ern_cnt.fq_tdrop,
+ percpu_priv->ern_cnt.fq_retired,
+ percpu_priv->ern_cnt.orp_zero);
+ }
+ seq_printf(file, "Total %8llu %8llu %8llu %8llu ",
+ total.ern_cnt.cg_tdrop,
+ total.ern_cnt.wred,
+ total.ern_cnt.err_cond,
+ total.ern_cnt.early_window);
+ seq_printf(file, "%8llu %8llu %8llu %8llu\n",
+ total.ern_cnt.late_window,
+ total.ern_cnt.fq_tdrop,
+ total.ern_cnt.fq_retired,
+ total.ern_cnt.orp_zero);
+
+ return 0;
+}
+
+static int __cold dpa_debugfs_open(struct inode *inode, struct file *file)
+{
+ int _errno;
+ const struct net_device *net_dev;
+
+ _errno = single_open(file, dpa_debugfs_show, inode->i_private);
+ if (unlikely(_errno < 0)) {
+ net_dev = (struct net_device *)inode->i_private;
+
+ if (netif_msg_drv((struct dpa_priv_s *)netdev_priv(net_dev)))
+ netdev_err(net_dev, "single_open() = %d\n",
+ _errno);
+ }
+ return _errno;
+}
+
+int dpa_netdev_debugfs_create(struct net_device *net_dev)
+{
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+
+ if (unlikely(!dpa_debugfs_root)) {
+ pr_err(KBUILD_MODNAME ": %s:%hu:%s(): \t%s\n",
+ KBUILD_BASENAME ".c", __LINE__, __func__,
+ "root debugfs missing, possible module ordering issue");
+ return -ENOMEM;
+ }
+
+ priv->debugfs_file = debugfs_create_file(net_dev->name,
+ S_IRUGO,
+ dpa_debugfs_root,
+ net_dev,
+ &dpa_debugfs_fops);
+ if (unlikely(!priv->debugfs_file)) {
+ netdev_err(net_dev, "debugfs_create_file(%s/%s/%s)",
+ powerpc_debugfs_root->d_iname,
+ dpa_debugfs_root->d_iname,
+ net_dev->name);
+
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void dpa_netdev_debugfs_remove(struct net_device *net_dev)
+{
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+
+ debugfs_remove(priv->debugfs_file);
+}
+
+int __init dpa_debugfs_module_init(void)
+{
+ int _errno = 0;
+
+ pr_info(KBUILD_MODNAME ": " DPA_DEBUGFS_DESCRIPTION "\n");
+
+ dpa_debugfs_root = debugfs_create_dir(DPA_ETH_DEBUGFS_ROOT,
+ powerpc_debugfs_root);
+ if (unlikely(!dpa_debugfs_root)) {
+ _errno = -ENOMEM;
+ pr_err(KBUILD_MODNAME ": %s:%hu:%s():\n",
+ KBUILD_BASENAME ".c", __LINE__, __func__);
+ pr_err("\tdebugfs_create_dir(%s/" KBUILD_MODNAME ") = %d\n",
+ powerpc_debugfs_root->d_iname, _errno);
+ }
+
+ return _errno;
+}
+
+void __exit dpa_debugfs_module_exit(void)
+{
+ debugfs_remove(dpa_debugfs_root);
+}
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.h b/drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.h
new file mode 100644
index 0000000..188ddf6
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_debugfs.h
@@ -0,0 +1,43 @@
+/* Copyright 2008-2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef DPAA_DEBUGFS_H_
+#define DPAA_DEBUGFS_H_
+
+#include <linux/netdevice.h>
+#include <linux/dcache.h> /* struct dentry needed in dpaa_eth.h */
+
+int dpa_netdev_debugfs_create(struct net_device *net_dev);
+void dpa_netdev_debugfs_remove(struct net_device *net_dev);
+int __init dpa_debugfs_module_init(void);
+void __exit dpa_debugfs_module_exit(void);
+
+#endif /* DPAA_DEBUGFS_H_ */
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index eba0809..a7875fb 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -58,6 +58,9 @@
#include "mac.h"
#include "dpaa_eth.h"
#include "dpaa_eth_common.h"
+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+#include "dpaa_debugfs.h"
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */

#define DPA_NAPI_WEIGHT 64

@@ -818,6 +821,10 @@ static int __init __cold dpa_load(void)

pr_info(DPA_DESCRIPTION "\n");

+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+ dpa_debugfs_module_init();
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
+
/* initialise dpaa_eth mirror values */
dpa_rx_extra_headroom = fm_get_rx_extra_headroom();
dpa_max_frm = fm_get_max_frm();
@@ -843,6 +850,10 @@ static void __exit __cold dpa_unload(void)

platform_driver_unregister(&dpa_driver);

+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+ dpa_debugfs_module_exit();
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
+
/* Only one channel is used and needs to be relased after all
* interfaces are removed
*/
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
index 761063d..83f89f4 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
@@ -252,6 +252,10 @@ struct dpa_priv_s {
u16 channel; /* "fsl,qman-channel-id" */
struct list_head dpa_fq_list;

+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+ struct dentry *debugfs_file;
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
+
u32 msg_enable; /* net_device message level */

struct {
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
index e92183a..71c108f 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
@@ -43,6 +43,9 @@
#include <linux/if_vlan.h> /* vlan_eth_hdr */
#include "dpaa_eth.h"
#include "dpaa_eth_common.h"
+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+#include "dpaa_debugfs.h"
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
#include "mac.h"

/* Size in bytes of the FQ taildrop threshold */
@@ -92,6 +95,15 @@ int dpa_netdev_init(struct net_device *net_dev,
return err;
}

+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+ /* create debugfs entry for this net_device */
+ err = dpa_netdev_debugfs_create(net_dev);
+ if (err) {
+ unregister_netdev(net_dev);
+ return err;
+ }
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
+
return 0;
}
EXPORT_SYMBOL(dpa_netdev_init);
@@ -313,6 +325,11 @@ int __cold dpa_remove(struct platform_device *pdev)
if (priv->buf_layout)
devm_kfree(dev, priv->buf_layout);

+#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
+ /* remove debugfs entry for this net_device */
+ dpa_netdev_debugfs_remove(net_dev);
+#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
+
free_netdev(net_dev);

return err;
--
1.7.11.7


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