[net-next v9 08/11] net: bcmasp: Add support for ethtool driver stats

Justin Chen
2023-07-13T22:20:21Z

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Add support for ethernet driver specific stats.

Signed-off-by: Justin Chen <justin.chen@broadcom.com>
---
v9
- Removed tx_realloc_offload, this stat is no longer relevant with
skb_cow_head().
- Added tx_timeout_cnt

v8
- Address maybe uninit variable warning

drivers/net/ethernet/broadcom/asp2/bcmasp.c | 4 +-
drivers/net/ethernet/broadcom/asp2/bcmasp.h | 21 +++
.../net/ethernet/broadcom/asp2/bcmasp_ethtool.c | 160 +++++++++++++++++++++
drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c | 18 ++-
4 files changed, 199 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
index 92dfea961add..a9984efff6d1 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
@@ -895,8 +895,10 @@ int bcmasp_set_en_mda_filter(struct bcmasp_intf *intf, unsigned char *addr,

/* Attempt to combine filters */
ret = bcmasp_combine_set_filter(intf, addr, mask, i);
- if (!ret)
+ if (!ret) {
+ intf->mib.filters_combine_cnt++;
return 0;
+ }
}

/* Create new filter if possible */
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.h b/drivers/net/ethernet/broadcom/asp2/bcmasp.h
index 18a44044ad93..6bfcaa7f95a8 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.h
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.h
@@ -244,6 +244,26 @@ struct bcmasp_intf_stats64 {
struct u64_stats_sync syncp;
};

+struct bcmasp_mib_counters {
+ u32 edpkt_ts;
+ u32 edpkt_rx_pkt_cnt;
+ u32 edpkt_hdr_ext_cnt;
+ u32 edpkt_hdr_out_cnt;
+ u32 umac_frm_cnt;
+ u32 fb_frm_cnt;
+ u32 fb_rx_fifo_depth;
+ u32 fb_out_frm_cnt;
+ u32 fb_filt_out_frm_cnt;
+ u32 alloc_rx_skb_failed;
+ u32 tx_dma_failed;
+ u32 mc_filters_full_cnt;
+ u32 uc_filters_full_cnt;
+ u32 filters_combine_cnt;
+ u32 promisc_filters_cnt;
+ u32 tx_realloc_offload_failed;
+ u32 tx_timeout_cnt;
+};
+
struct bcmasp_intf_ops {
unsigned long (*rx_desc_read)(struct bcmasp_intf *intf);
void (*rx_buffer_write)(struct bcmasp_intf *intf, dma_addr_t addr);
@@ -309,6 +329,7 @@ struct bcmasp_intf {

/* Statistics */
struct bcmasp_intf_stats64 stats64;
+ struct bcmasp_mib_counters mib;

u32 wolopts;
u8 sopass[SOPASS_MAX];
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_ethtool.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_ethtool.c
index 59d853c2293c..c4f1604d5ab3 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp_ethtool.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_ethtool.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#define pr_fmt(fmt) "bcmasp_ethtool: " fmt

+#include <asm-generic/unaligned.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
@@ -8,6 +9,162 @@
#include "bcmasp.h"
#include "bcmasp_intf_defs.h"

+enum bcmasp_stat_type {
+ BCMASP_STAT_RX_EDPKT,
+ BCMASP_STAT_RX_CTRL,
+ BCMASP_STAT_RX_CTRL_PER_INTF,
+ BCMASP_STAT_SOFT,
+};
+
+struct bcmasp_stats {
+ char stat_string[ETH_GSTRING_LEN];
+ enum bcmasp_stat_type type;
+ u32 reg_offset;
+};
+
+#define STAT_BCMASP_SOFT_MIB(str) { \
+ .stat_string = str, \
+ .type = BCMASP_STAT_SOFT, \
+}
+
+#define STAT_BCMASP_OFFSET(str, _type, offset) { \
+ .stat_string = str, \
+ .type = _type, \
+ .reg_offset = offset, \
+}
+
+#define STAT_BCMASP_RX_EDPKT(str, offset) \
+ STAT_BCMASP_OFFSET(str, BCMASP_STAT_RX_EDPKT, offset)
+#define STAT_BCMASP_RX_CTRL(str, offset) \
+ STAT_BCMASP_OFFSET(str, BCMASP_STAT_RX_CTRL, offset)
+#define STAT_BCMASP_RX_CTRL_PER_INTF(str, offset) \
+ STAT_BCMASP_OFFSET(str, BCMASP_STAT_RX_CTRL_PER_INTF, offset)
+
+/* Must match the order of struct bcmasp_mib_counters */
+static const struct bcmasp_stats bcmasp_gstrings_stats[] = {
+ /* EDPKT counters */
+ STAT_BCMASP_RX_EDPKT("RX Time Stamp", ASP_EDPKT_RX_TS_COUNTER),
+ STAT_BCMASP_RX_EDPKT("RX PKT Count", ASP_EDPKT_RX_PKT_CNT),
+ STAT_BCMASP_RX_EDPKT("RX PKT Buffered", ASP_EDPKT_HDR_EXTR_CNT),
+ STAT_BCMASP_RX_EDPKT("RX PKT Pushed to DRAM", ASP_EDPKT_HDR_OUT_CNT),
+ /* ASP RX control */
+ STAT_BCMASP_RX_CTRL_PER_INTF("Frames From Unimac",
+ ASP_RX_CTRL_UMAC_0_FRAME_COUNT),
+ STAT_BCMASP_RX_CTRL_PER_INTF("Frames From Port",
+ ASP_RX_CTRL_FB_0_FRAME_COUNT),
+ STAT_BCMASP_RX_CTRL_PER_INTF("RX Buffer FIFO Depth",
+ ASP_RX_CTRL_FB_RX_FIFO_DEPTH),
+ STAT_BCMASP_RX_CTRL("Frames Out(Buffer)",
+ ASP_RX_CTRL_FB_OUT_FRAME_COUNT),
+ STAT_BCMASP_RX_CTRL("Frames Out(Filters)",
+ ASP_RX_CTRL_FB_FILT_OUT_FRAME_COUNT),
+ /* Software maintained statistics */
+ STAT_BCMASP_SOFT_MIB("RX SKB Alloc Failed"),
+ STAT_BCMASP_SOFT_MIB("TX DMA Failed"),
+ STAT_BCMASP_SOFT_MIB("Multicast Filters Full"),
+ STAT_BCMASP_SOFT_MIB("Unicast Filters Full"),
+ STAT_BCMASP_SOFT_MIB("MDA Filters Combined"),
+ STAT_BCMASP_SOFT_MIB("Promisc Filter Set"),
+ STAT_BCMASP_SOFT_MIB("TX Realloc For Offload Failed"),
+ STAT_BCMASP_SOFT_MIB("Tx Timeout Count"),
+};
+
+#define BCMASP_STATS_LEN ARRAY_SIZE(bcmasp_gstrings_stats)
+
+static u16 bcmasp_stat_fixup_offset(struct bcmasp_intf *intf,
+ const struct bcmasp_stats *s)
+{
+ struct bcmasp_priv *priv = intf->parent;
+
+ if (!strcmp("Frames Out(Buffer)", s->stat_string))
+ return priv->hw_info->rx_ctrl_fb_out_frame_count;
+
+ if (!strcmp("Frames Out(Filters)", s->stat_string))
+ return priv->hw_info->rx_ctrl_fb_filt_out_frame_count;
+
+ if (!strcmp("RX Buffer FIFO Depth", s->stat_string))
+ return priv->hw_info->rx_ctrl_fb_rx_fifo_depth;
+
+ return s->reg_offset;
+}
+
+static int bcmasp_get_sset_count(struct net_device *dev, int string_set)
+{
+ switch (string_set) {
+ case ETH_SS_STATS:
+ return BCMASP_STATS_LEN;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void bcmasp_get_strings(struct net_device *dev, u32 stringset,
+ u8 *data)
+{
+ unsigned int i;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ for (i = 0; i < BCMASP_STATS_LEN; i++) {
+ memcpy(data + i * ETH_GSTRING_LEN,
+ bcmasp_gstrings_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ }
+ break;
+ default:
+ return;
+ }
+}
+
+static void bcmasp_update_mib_counters(struct bcmasp_intf *intf)
+{
+ unsigned int i;
+
+ for (i = 0; i < BCMASP_STATS_LEN; i++) {
+ const struct bcmasp_stats *s;
+ u32 offset, val;
+ char *p;
+
+ s = &bcmasp_gstrings_stats[i];
+ offset = bcmasp_stat_fixup_offset(intf, s);
+ switch (s->type) {
+ case BCMASP_STAT_SOFT:
+ continue;
+ case BCMASP_STAT_RX_EDPKT:
+ val = rx_edpkt_core_rl(intf->parent, offset);
+ break;
+ case BCMASP_STAT_RX_CTRL:
+ val = rx_ctrl_core_rl(intf->parent, offset);
+ break;
+ case BCMASP_STAT_RX_CTRL_PER_INTF:
+ offset += sizeof(u32) * intf->port;
+ val = rx_ctrl_core_rl(intf->parent, offset);
+ break;
+ default:
+ continue;
+ }
+ p = (char *)(&intf->mib) + (i * sizeof(u32));
+ put_unaligned(val, (u32 *)p);
+ }
+}
+
+static void bcmasp_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats,
+ u64 *data)
+{
+ struct bcmasp_intf *intf = netdev_priv(dev);
+ unsigned int i;
+ char *p;
+
+ if (netif_running(dev))
+ bcmasp_update_mib_counters(intf);
+
+ for (i = 0; i < BCMASP_STATS_LEN; i++) {
+ p = (char *)(&intf->mib) + (i * sizeof(u32));
+ data[i] = *(u32 *)p;
+ }
+}
+
static void bcmasp_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
@@ -340,4 +497,7 @@ const struct ethtool_ops bcmasp_ethtool_ops = {
.get_eth_mac_stats = bcmasp_get_eth_mac_stats,
.get_rmon_stats = bcmasp_get_rmon_stats,
.get_eth_ctrl_stats = bcmasp_get_eth_ctrl_stats,
+ .get_strings = bcmasp_get_strings,
+ .get_ethtool_stats = bcmasp_get_ethtool_stats,
+ .get_sset_count = bcmasp_get_sset_count,
};
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
index 051f882b2766..53e542881255 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
@@ -104,15 +104,19 @@ static void bcmasp_set_rx_mode(struct net_device *dev)

netdev_for_each_mc_addr(ha, dev) {
ret = bcmasp_set_en_mda_filter(intf, ha->addr, mask);
- if (ret)
+ if (ret) {
+ intf->mib.mc_filters_full_cnt++;
goto set_promisc;
+ }
}
}

netdev_for_each_uc_addr(ha, dev) {
ret = bcmasp_set_en_mda_filter(intf, ha->addr, mask);
- if (ret)
+ if (ret) {
+ intf->mib.uc_filters_full_cnt++;
goto set_promisc;
+ }
}

spin_unlock_bh(&intf->parent->mda_lock);
@@ -120,6 +124,7 @@ static void bcmasp_set_rx_mode(struct net_device *dev)

set_promisc:
bcmasp_set_promisc(intf, 1);
+ intf->mib.promisc_filters_cnt++;

/* disable all filters used by this port */
bcmasp_disable_all_filters(intf);
@@ -155,6 +160,7 @@ static struct sk_buff *bcmasp_csum_offload(struct net_device *dev,
struct sk_buff *skb,
bool *csum_hw)
{
+ struct bcmasp_intf *intf = netdev_priv(dev);
u32 header = 0, header2 = 0, epkt = 0;
struct bcmasp_pkt_offload *offload;
unsigned int header_cnt = 0;
@@ -165,8 +171,10 @@ static struct sk_buff *bcmasp_csum_offload(struct net_device *dev,
return skb;

ret = skb_cow_head(skb, sizeof(*offload));
- if (ret < 0)
+ if (ret < 0) {
+ intf->mib.tx_realloc_offload_failed++;
goto help;
+ }

switch (skb->protocol) {
case htons(ETH_P_IP):
@@ -305,6 +313,7 @@ static netdev_tx_t bcmasp_xmit(struct sk_buff *skb, struct net_device *dev)
}

if (dma_mapping_error(kdev, mapping)) {
+ intf->mib.tx_dma_failed++;
spb_index = intf->tx_spb_index;
for (j = 0; j < i; j++) {
bcmasp_clean_txcb(intf, spb_index);
@@ -541,6 +550,8 @@ static int bcmasp_rx_poll(struct napi_struct *napi, int budget)
u64_stats_update_begin(&stats->syncp);
u64_stats_inc(&stats->rx_dropped);
u64_stats_update_end(&stats->syncp);
+ intf->mib.alloc_rx_skb_failed++;
+
goto next;
}

@@ -1116,6 +1127,7 @@ static void bcmasp_tx_timeout(struct net_device *dev, unsigned int txqueue)
struct bcmasp_intf *intf = netdev_priv(dev);

netif_dbg(intf, tx_err, dev, "transmit timeout!\n");
+ intf->mib.tx_timeout_cnt++;
}

static int bcmasp_get_phys_port_name(struct net_device *dev,