openwrt/target/linux/qualcommbe/patches-6.6/103-42-net-ethernet-qualcomm-Add-miscellaneous-error-interr.patch

From 4dfbbaa1e9ab01f1126c9e7a89583aad0b6600da Mon Sep 17 00:00:00 2001
From: Suruchi Agarwal <quic_suruchia@quicinc.com>
Date: Thu, 21 Mar 2024 16:31:04 -0700
Subject: [PATCH 42/50] net: ethernet: qualcomm: Add miscellaneous error
 interrupts and counters

Miscellaneous error interrupts, EDMA Tx/Rx and error counters are supported
using debugfs framework.

Change-Id: I7da8b978a7e93947b03a45269a81b401f35da31c
Co-developed-by: Pavithra R <quic_pavir@quicinc.com>
Signed-off-by: Pavithra R <quic_pavir@quicinc.com>
Signed-off-by: Suruchi Agarwal <quic_suruchia@quicinc.com>
---
 drivers/net/ethernet/qualcomm/ppe/Makefile    |   2 +-
 drivers/net/ethernet/qualcomm/ppe/edma.c      | 162 ++++++++
 drivers/net/ethernet/qualcomm/ppe/edma.h      |  31 +-
 .../net/ethernet/qualcomm/ppe/edma_debugfs.c  | 370 ++++++++++++++++++
 .../net/ethernet/qualcomm/ppe/ppe_debugfs.c   |  17 +
 5 files changed, 580 insertions(+), 2 deletions(-)
 create mode 100644 drivers/net/ethernet/qualcomm/ppe/edma_debugfs.c

diff --git a/drivers/net/ethernet/qualcomm/ppe/Makefile b/drivers/net/ethernet/qualcomm/ppe/Makefile
index b358bfd781fb..45e1b103ec7a 100644
--- a/drivers/net/ethernet/qualcomm/ppe/Makefile
+++ b/drivers/net/ethernet/qualcomm/ppe/Makefile
@@ -7,4 +7,4 @@ obj-$(CONFIG_QCOM_PPE) += qcom-ppe.o
 qcom-ppe-objs := ppe.o ppe_config.o ppe_api.o ppe_debugfs.o ppe_port.o
 
 #EDMA
-qcom-ppe-objs += edma.o edma_cfg_rx.o edma_cfg_tx.o edma_port.o edma_rx.o edma_tx.o
+qcom-ppe-objs += edma.o edma_cfg_rx.o edma_cfg_tx.o edma_debugfs.o edma_port.o edma_rx.o edma_tx.o
diff --git a/drivers/net/ethernet/qualcomm/ppe/edma.c b/drivers/net/ethernet/qualcomm/ppe/edma.c
index 739fcfbde0f9..0e16f8ab545f 100644
--- a/drivers/net/ethernet/qualcomm/ppe/edma.c
+++ b/drivers/net/ethernet/qualcomm/ppe/edma.c
@@ -151,6 +151,42 @@ static int edma_clock_init(void)
 	return 0;
 }
 
+/**
+ * edma_err_stats_alloc - Allocate stats memory
+ *
+ * Allocate memory for per-CPU error stats.
+ */
+int edma_err_stats_alloc(void)
+{
+	u32 i;
+
+	edma_ctx->err_stats = alloc_percpu(*edma_ctx->err_stats);
+	if (!edma_ctx->err_stats)
+		return -ENOMEM;
+
+	for_each_possible_cpu(i) {
+		struct edma_err_stats *stats;
+
+		stats = per_cpu_ptr(edma_ctx->err_stats, i);
+		u64_stats_init(&stats->syncp);
+	}
+
+	return 0;
+}
+
+/**
+ * edma_err_stats_free - Free stats memory
+ *
+ * Free memory of per-CPU error stats.
+ */
+void edma_err_stats_free(void)
+{
+	if (edma_ctx->err_stats) {
+		free_percpu(edma_ctx->err_stats);
+		edma_ctx->err_stats = NULL;
+	}
+}
+
 /**
  * edma_configure_ucast_prio_map_tbl - Configure unicast priority map table.
  *
@@ -191,11 +227,113 @@ static int edma_configure_ucast_prio_map_tbl(void)
 	return ret;
 }
 
+static void edma_disable_misc_interrupt(void)
+{
+	struct ppe_device *ppe_dev = edma_ctx->ppe_dev;
+	struct regmap *regmap = ppe_dev->regmap;
+	u32 reg;
+
+	reg = EDMA_BASE_OFFSET + EDMA_REG_MISC_INT_MASK_ADDR;
+	regmap_write(regmap, reg, EDMA_MASK_INT_CLEAR);
+}
+
+static void edma_enable_misc_interrupt(void)
+{
+	struct ppe_device *ppe_dev = edma_ctx->ppe_dev;
+	struct regmap *regmap = ppe_dev->regmap;
+	u32 reg;
+
+	reg = EDMA_BASE_OFFSET + EDMA_REG_MISC_INT_MASK_ADDR;
+	regmap_write(regmap, reg, edma_ctx->intr_info.intr_mask_misc);
+}
+
+static irqreturn_t edma_misc_handle_irq(int irq,
+					__maybe_unused void *ctx)
+{
+	struct edma_err_stats *stats = this_cpu_ptr(edma_ctx->err_stats);
+	struct ppe_device *ppe_dev = edma_ctx->ppe_dev;
+	struct regmap *regmap = ppe_dev->regmap;
+	u32 misc_intr_status, data, reg;
+
+	/* Read Misc intr status */
+	reg = EDMA_BASE_OFFSET + EDMA_REG_MISC_INT_STAT_ADDR;
+	regmap_read(regmap, reg, &data);
+	misc_intr_status = data & edma_ctx->intr_info.intr_mask_misc;
+
+	pr_debug("Received misc irq %d, status: %d\n", irq, misc_intr_status);
+
+	if (FIELD_GET(EDMA_MISC_AXI_RD_ERR_MASK, misc_intr_status)) {
+		pr_err("MISC AXI read error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_axi_read_err;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_AXI_WR_ERR_MASK, misc_intr_status)) {
+		pr_err("MISC AXI write error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_axi_write_err;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_RX_DESC_FIFO_FULL_MASK, misc_intr_status)) {
+		if (net_ratelimit())
+			pr_err("MISC Rx descriptor fifo full error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_rxdesc_fifo_full;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_RX_ERR_BUF_SIZE_MASK, misc_intr_status)) {
+		if (net_ratelimit())
+			pr_err("MISC Rx buffer size error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_rx_buf_size_err;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_TX_SRAM_FULL_MASK, misc_intr_status)) {
+		if (net_ratelimit())
+			pr_err("MISC Tx SRAM full error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_tx_sram_full;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_TX_CMPL_BUF_FULL_MASK, misc_intr_status)) {
+		if (net_ratelimit())
+			pr_err("MISC Tx complete buffer full error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_txcmpl_buf_full;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_DATA_LEN_ERR_MASK, misc_intr_status)) {
+		if (net_ratelimit())
+			pr_err("MISC data length error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_tx_data_len_err;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	if (FIELD_GET(EDMA_MISC_TX_TIMEOUT_MASK, misc_intr_status)) {
+		if (net_ratelimit())
+			pr_err("MISC Tx timeout error received\n");
+		u64_stats_update_begin(&stats->syncp);
+		++stats->edma_tx_timeout;
+		u64_stats_update_end(&stats->syncp);
+	}
+
+	return IRQ_HANDLED;
+}
+
 static int edma_irq_register(void)
 {
 	struct edma_hw_info *hw_info = edma_ctx->hw_info;
 	struct edma_ring_info *txcmpl = hw_info->txcmpl;
+	struct ppe_device *ppe_dev = edma_ctx->ppe_dev;
 	struct edma_ring_info *rx = hw_info->rx;
+	struct device *dev = ppe_dev->dev;
 	int ret;
 	u32 i;
 
@@ -270,8 +408,25 @@ static int edma_irq_register(void)
 			 edma_rxdesc_irq_name[i]);
 	}
 
+	/* Request Misc IRQ */
+	ret = request_irq(edma_ctx->intr_info.intr_misc, edma_misc_handle_irq,
+			  IRQF_SHARED, "edma_misc",
+			  (void *)dev);
+	if (ret) {
+		pr_err("MISC IRQ:%d request failed\n",
+		       edma_ctx->intr_info.intr_misc);
+		goto misc_intr_req_fail;
+	}
+
 	return 0;
 
+misc_intr_req_fail:
+	/* Free IRQ for RXDESC rings */
+	for (i = 0; i < rx->num_rings; i++) {
+		synchronize_irq(edma_ctx->intr_info.intr_rx[i]);
+		free_irq(edma_ctx->intr_info.intr_rx[i],
+			 (void *)&edma_ctx->rx_rings[i]);
+	}
 rx_desc_ring_intr_req_fail:
 	for (i = 0; i < rx->num_rings; i++)
 		kfree(edma_rxdesc_irq_name[i]);
@@ -503,6 +658,7 @@ static int edma_hw_configure(void)
 		edma_cfg_tx_disable_interrupts(i);
 
 	edma_cfg_rx_disable_interrupts();
+	edma_disable_misc_interrupt();
 
 	edma_cfg_rx_rings_disable();
 
@@ -614,6 +770,7 @@ void edma_destroy(struct ppe_device *ppe_dev)
 		edma_cfg_tx_disable_interrupts(i);
 
 	edma_cfg_rx_disable_interrupts();
+	edma_disable_misc_interrupt();
 
 	/* Free IRQ for TXCMPL rings. */
 	for (i = 0; i < txcmpl->num_rings; i++) {
@@ -634,6 +791,10 @@ void edma_destroy(struct ppe_device *ppe_dev)
 	}
 	kfree(edma_rxdesc_irq_name);
 
+	/* Free Misc IRQ */
+	synchronize_irq(edma_ctx->intr_info.intr_misc);
+	free_irq(edma_ctx->intr_info.intr_misc, (void *)(ppe_dev->dev));
+
 	kfree(edma_ctx->intr_info.intr_rx);
 	kfree(edma_ctx->intr_info.intr_txcmpl);
 
@@ -699,6 +860,7 @@ int edma_setup(struct ppe_device *ppe_dev)
 	}
 
 	edma_cfg_rx_enable_interrupts();
+	edma_enable_misc_interrupt();
 
 	dev_info(dev, "EDMA configuration successful\n");
 
diff --git a/drivers/net/ethernet/qualcomm/ppe/edma.h b/drivers/net/ethernet/qualcomm/ppe/edma.h
index fb8ccbfbaf41..6500d21b9eba 100644
--- a/drivers/net/ethernet/qualcomm/ppe/edma.h
+++ b/drivers/net/ethernet/qualcomm/ppe/edma.h
@@ -36,6 +36,30 @@
 			((((head) - (tail)) + \
 			(max)) & ((max) - 1)); })
 
+/**
+ * struct edma_err_stats - EDMA error stats
+ * @edma_axi_read_err: AXI read error
+ * @edma_axi_write_err: AXI write error
+ * @edma_rxdesc_fifo_full: Rx desc FIFO full error
+ * @edma_rx_buf_size_err: Rx buffer size too small error
+ * @edma_tx_sram_full: Tx packet SRAM buffer full error
+ * @edma_tx_data_len_err: Tx data length error
+ * @edma_tx_timeout: Tx timeout error
+ * @edma_txcmpl_buf_full: Tx completion buffer full error
+ * @syncp: Synchronization pointer
+ */
+struct edma_err_stats {
+	u64 edma_axi_read_err;
+	u64 edma_axi_write_err;
+	u64 edma_rxdesc_fifo_full;
+	u64 edma_rx_buf_size_err;
+	u64 edma_tx_sram_full;
+	u64 edma_tx_data_len_err;
+	u64 edma_tx_timeout;
+	u64 edma_txcmpl_buf_full;
+	struct u64_stats_sync syncp;
+};
+
 /**
  * struct edma_ring_info - EDMA ring data structure.
  * @max_rings: Maximum number of rings
@@ -97,6 +121,7 @@ struct edma_intr_info {
  * @rx_rings: Rx Desc Rings, SW is consumer
  * @tx_rings: Tx Descriptor Ring, SW is producer
  * @txcmpl_rings: Tx complete Ring, SW is consumer
+ * @err_stats: Per CPU error statistics
  * @rx_page_mode: Page mode enabled or disabled
  * @rx_buf_size: Rx buffer size for Jumbo MRU
  * @tx_requeue_stop: Tx requeue stop enabled or disabled
@@ -111,6 +136,7 @@ struct edma_context {
 	struct edma_rxdesc_ring *rx_rings;
 	struct edma_txdesc_ring *tx_rings;
 	struct edma_txcmpl_ring *txcmpl_rings;
+	struct edma_err_stats __percpu *err_stats;
 	u32 rx_page_mode;
 	u32 rx_buf_size;
 	bool tx_requeue_stop;
@@ -119,7 +145,10 @@ struct edma_context {
 /* Global EDMA context */
 extern struct edma_context *edma_ctx;
 
+int edma_err_stats_alloc(void);
+void edma_err_stats_free(void);
 void edma_destroy(struct ppe_device *ppe_dev);
 int edma_setup(struct ppe_device *ppe_dev);
-
+void edma_debugfs_teardown(void);
+int edma_debugfs_setup(struct ppe_device *ppe_dev);
 #endif
diff --git a/drivers/net/ethernet/qualcomm/ppe/edma_debugfs.c b/drivers/net/ethernet/qualcomm/ppe/edma_debugfs.c
new file mode 100644
index 000000000000..671062d4ee72
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/ppe/edma_debugfs.c
@@ -0,0 +1,370 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+/* EDMA debugfs routines for display of Tx/Rx counters. */
+
+#include <linux/cpumask.h>
+#include <linux/debugfs.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/printk.h>
+
+#include "edma.h"
+
+#define EDMA_STATS_BANNER_MAX_LEN       80
+#define EDMA_RX_RING_STATS_NODE_NAME    "EDMA_RX"
+#define EDMA_TX_RING_STATS_NODE_NAME    "EDMA_TX"
+#define EDMA_ERR_STATS_NODE_NAME        "EDMA_ERR"
+
+static struct dentry *edma_dentry;
+static struct dentry *stats_dentry;
+
+static void edma_debugfs_print_banner(struct seq_file *m, char *node)
+{
+	u32 banner_char_len, i;
+
+	for (i = 0; i < EDMA_STATS_BANNER_MAX_LEN; i++)
+		seq_puts(m, "_");
+	banner_char_len = (EDMA_STATS_BANNER_MAX_LEN - (strlen(node) + 2)) / 2;
+	seq_puts(m, "\n\n");
+
+	for (i = 0; i < banner_char_len; i++)
+		seq_puts(m, "<");
+	seq_printf(m, " %s ", node);
+
+	for (i = 0; i < banner_char_len; i++)
+		seq_puts(m, ">");
+	seq_puts(m, "\n");
+
+	for (i = 0; i < EDMA_STATS_BANNER_MAX_LEN; i++)
+		seq_puts(m, "_");
+	seq_puts(m, "\n\n");
+}
+
+static int edma_debugfs_rx_rings_stats_show(struct seq_file *m,
+					    void __maybe_unused *p)
+{
+	struct edma_hw_info *hw_info = edma_ctx->hw_info;
+	struct edma_ring_info *rxfill = hw_info->rxfill;
+	struct edma_rxfill_stats *rxfill_stats;
+	struct edma_rxdesc_stats *rxdesc_stats;
+	struct edma_ring_info *rx = hw_info->rx;
+	unsigned int start;
+	u32 i;
+
+	rxfill_stats = kcalloc(rxfill->num_rings, sizeof(*rxfill_stats), GFP_KERNEL);
+	if (!rxfill_stats)
+		return -ENOMEM;
+
+	rxdesc_stats = kcalloc(rx->num_rings, sizeof(*rxdesc_stats), GFP_KERNEL);
+	if (!rxdesc_stats) {
+		kfree(rxfill_stats);
+		return -ENOMEM;
+	}
+
+	/* Get stats for Rx fill rings. */
+	for (i = 0; i < rxfill->num_rings; i++) {
+		struct edma_rxfill_ring *rxfill_ring;
+		struct edma_rxfill_stats *stats;
+
+		rxfill_ring = &edma_ctx->rxfill_rings[i];
+		stats = &rxfill_ring->rxfill_stats;
+		do {
+			start = u64_stats_fetch_begin(&stats->syncp);
+			rxfill_stats[i].alloc_failed = stats->alloc_failed;
+			rxfill_stats[i].page_alloc_failed = stats->page_alloc_failed;
+		} while (u64_stats_fetch_retry(&stats->syncp, start));
+	}
+
+	/* Get stats for Rx Desc rings. */
+	for (i = 0; i < rx->num_rings; i++) {
+		struct edma_rxdesc_ring *rxdesc_ring;
+		struct edma_rxdesc_stats *stats;
+
+		rxdesc_ring = &edma_ctx->rx_rings[i];
+		stats = &rxdesc_ring->rxdesc_stats;
+		do {
+			start = u64_stats_fetch_begin(&stats->syncp);
+			rxdesc_stats[i].src_port_inval = stats->src_port_inval;
+			rxdesc_stats[i].src_port_inval_type = stats->src_port_inval_type;
+			rxdesc_stats[i].src_port_inval_netdev = stats->src_port_inval_netdev;
+		} while (u64_stats_fetch_retry(&stats->syncp, start));
+	}
+
+	edma_debugfs_print_banner(m, EDMA_RX_RING_STATS_NODE_NAME);
+
+	seq_puts(m, "\n#EDMA RX descriptor rings stats:\n\n");
+	for (i = 0; i < rx->num_rings; i++) {
+		seq_printf(m, "\t\tEDMA RX descriptor %d ring stats:\n", i + rx->ring_start);
+		seq_printf(m, "\t\t rxdesc[%d]:src_port_inval = %llu\n",
+			   i + rx->ring_start, rxdesc_stats[i].src_port_inval);
+		seq_printf(m, "\t\t rxdesc[%d]:src_port_inval_type = %llu\n",
+			   i + rx->ring_start, rxdesc_stats[i].src_port_inval_type);
+		seq_printf(m, "\t\t rxdesc[%d]:src_port_inval_netdev = %llu\n",
+			   i + rx->ring_start,
+			   rxdesc_stats[i].src_port_inval_netdev);
+		seq_puts(m, "\n");
+	}
+
+	seq_puts(m, "\n#EDMA RX fill rings stats:\n\n");
+	for (i = 0; i < rxfill->num_rings; i++) {
+		seq_printf(m, "\t\tEDMA RX fill %d ring stats:\n", i + rxfill->ring_start);
+		seq_printf(m, "\t\t rxfill[%d]:alloc_failed = %llu\n",
+			   i + rxfill->ring_start, rxfill_stats[i].alloc_failed);
+		seq_printf(m, "\t\t rxfill[%d]:page_alloc_failed = %llu\n",
+			   i + rxfill->ring_start, rxfill_stats[i].page_alloc_failed);
+		seq_puts(m, "\n");
+	}
+
+	kfree(rxfill_stats);
+	kfree(rxdesc_stats);
+	return 0;
+}
+
+static int edma_debugfs_tx_rings_stats_show(struct seq_file *m,
+					    void __maybe_unused *p)
+{
+	struct edma_hw_info *hw_info = edma_ctx->hw_info;
+	struct edma_ring_info *txcmpl = hw_info->txcmpl;
+	struct edma_ring_info *tx = hw_info->tx;
+	struct edma_txcmpl_stats *txcmpl_stats;
+	struct edma_txdesc_stats *txdesc_stats;
+	unsigned int start;
+	u32 i;
+
+	txcmpl_stats = kcalloc(txcmpl->num_rings, sizeof(*txcmpl_stats), GFP_KERNEL);
+	if (!txcmpl_stats)
+		return -ENOMEM;
+
+	txdesc_stats = kcalloc(tx->num_rings, sizeof(*txdesc_stats), GFP_KERNEL);
+	if (!txdesc_stats) {
+		kfree(txcmpl_stats);
+		return -ENOMEM;
+	}
+
+	/* Get stats for Tx desc rings. */
+	for (i = 0; i < tx->num_rings; i++) {
+		struct edma_txdesc_ring *txdesc_ring;
+		struct edma_txdesc_stats *stats;
+
+		txdesc_ring = &edma_ctx->tx_rings[i];
+		stats = &txdesc_ring->txdesc_stats;
+		do {
+			start = u64_stats_fetch_begin(&stats->syncp);
+			txdesc_stats[i].no_desc_avail = stats->no_desc_avail;
+			txdesc_stats[i].tso_max_seg_exceed = stats->tso_max_seg_exceed;
+		} while (u64_stats_fetch_retry(&stats->syncp, start));
+	}
+
+	/* Get stats for Tx Complete rings. */
+	for (i = 0; i < txcmpl->num_rings; i++) {
+		struct edma_txcmpl_ring *txcmpl_ring;
+		struct edma_txcmpl_stats *stats;
+
+		txcmpl_ring = &edma_ctx->txcmpl_rings[i];
+		stats = &txcmpl_ring->txcmpl_stats;
+		do {
+			start = u64_stats_fetch_begin(&stats->syncp);
+			txcmpl_stats[i].invalid_buffer = stats->invalid_buffer;
+			txcmpl_stats[i].errors = stats->errors;
+			txcmpl_stats[i].desc_with_more_bit = stats->desc_with_more_bit;
+			txcmpl_stats[i].no_pending_desc = stats->no_pending_desc;
+		} while (u64_stats_fetch_retry(&stats->syncp, start));
+	}
+
+	edma_debugfs_print_banner(m, EDMA_TX_RING_STATS_NODE_NAME);
+
+	seq_puts(m, "\n#EDMA TX complete rings stats:\n\n");
+	for (i = 0; i < txcmpl->num_rings; i++) {
+		seq_printf(m, "\t\tEDMA TX complete %d ring stats:\n", i + txcmpl->ring_start);
+		seq_printf(m, "\t\t txcmpl[%d]:invalid_buffer = %llu\n",
+			   i + txcmpl->ring_start, txcmpl_stats[i].invalid_buffer);
+		seq_printf(m, "\t\t txcmpl[%d]:errors = %llu\n",
+			   i + txcmpl->ring_start, txcmpl_stats[i].errors);
+		seq_printf(m, "\t\t txcmpl[%d]:desc_with_more_bit = %llu\n",
+			   i + txcmpl->ring_start, txcmpl_stats[i].desc_with_more_bit);
+		seq_printf(m, "\t\t txcmpl[%d]:no_pending_desc = %llu\n",
+			   i + txcmpl->ring_start, txcmpl_stats[i].no_pending_desc);
+		seq_puts(m, "\n");
+	}
+
+	seq_puts(m, "\n#EDMA TX descriptor rings stats:\n\n");
+	for (i = 0; i < tx->num_rings; i++) {
+		seq_printf(m, "\t\tEDMA TX descriptor %d ring stats:\n", i + tx->ring_start);
+		seq_printf(m, "\t\t txdesc[%d]:no_desc_avail = %llu\n",
+			   i + tx->ring_start, txdesc_stats[i].no_desc_avail);
+		seq_printf(m, "\t\t txdesc[%d]:tso_max_seg_exceed = %llu\n",
+			   i + tx->ring_start, txdesc_stats[i].tso_max_seg_exceed);
+		seq_puts(m, "\n");
+	}
+
+	kfree(txcmpl_stats);
+	kfree(txdesc_stats);
+	return 0;
+}
+
+static int edma_debugfs_err_stats_show(struct seq_file *m,
+				       void __maybe_unused *p)
+{
+	struct edma_err_stats *err_stats, *pcpu_err_stats;
+	unsigned int start;
+	u32 cpu;
+
+	err_stats = kzalloc(sizeof(*err_stats), GFP_KERNEL);
+	if (!err_stats)
+		return -ENOMEM;
+
+	/* Get percpu EDMA miscellaneous stats. */
+	for_each_possible_cpu(cpu) {
+		pcpu_err_stats = per_cpu_ptr(edma_ctx->err_stats, cpu);
+		do {
+			start = u64_stats_fetch_begin(&pcpu_err_stats->syncp);
+			err_stats->edma_axi_read_err +=
+				pcpu_err_stats->edma_axi_read_err;
+			err_stats->edma_axi_write_err +=
+				pcpu_err_stats->edma_axi_write_err;
+			err_stats->edma_rxdesc_fifo_full +=
+				pcpu_err_stats->edma_rxdesc_fifo_full;
+			err_stats->edma_rx_buf_size_err +=
+				pcpu_err_stats->edma_rx_buf_size_err;
+			err_stats->edma_tx_sram_full +=
+				pcpu_err_stats->edma_tx_sram_full;
+			err_stats->edma_tx_data_len_err +=
+				pcpu_err_stats->edma_tx_data_len_err;
+			err_stats->edma_tx_timeout +=
+				pcpu_err_stats->edma_tx_timeout;
+			err_stats->edma_txcmpl_buf_full +=
+				pcpu_err_stats->edma_txcmpl_buf_full;
+		} while (u64_stats_fetch_retry(&pcpu_err_stats->syncp, start));
+	}
+
+	edma_debugfs_print_banner(m, EDMA_ERR_STATS_NODE_NAME);
+
+	seq_puts(m, "\n#EDMA error stats:\n\n");
+	seq_printf(m, "\t\t axi read error = %llu\n",
+		   err_stats->edma_axi_read_err);
+	seq_printf(m, "\t\t axi write error = %llu\n",
+		   err_stats->edma_axi_write_err);
+	seq_printf(m, "\t\t Rx descriptor fifo full = %llu\n",
+		   err_stats->edma_rxdesc_fifo_full);
+	seq_printf(m, "\t\t Rx buffer size error = %llu\n",
+		   err_stats->edma_rx_buf_size_err);
+	seq_printf(m, "\t\t Tx SRAM full = %llu\n",
+		   err_stats->edma_tx_sram_full);
+	seq_printf(m, "\t\t Tx data length error = %llu\n",
+		   err_stats->edma_tx_data_len_err);
+	seq_printf(m, "\t\t Tx timeout = %llu\n",
+		   err_stats->edma_tx_timeout);
+	seq_printf(m, "\t\t Tx completion buffer full = %llu\n",
+		   err_stats->edma_txcmpl_buf_full);
+
+	kfree(err_stats);
+	return 0;
+}
+
+static int edma_debugs_rx_rings_stats_open(struct inode *inode,
+					   struct file *file)
+{
+	return single_open(file, edma_debugfs_rx_rings_stats_show,
+			   inode->i_private);
+}
+
+static const struct file_operations edma_debugfs_rx_rings_file_ops = {
+	.open = edma_debugs_rx_rings_stats_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = seq_release
+};
+
+static int edma_debugs_tx_rings_stats_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, edma_debugfs_tx_rings_stats_show, inode->i_private);
+}
+
+static const struct file_operations edma_debugfs_tx_rings_file_ops = {
+	.open = edma_debugs_tx_rings_stats_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = seq_release
+};
+
+static int edma_debugs_err_stats_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, edma_debugfs_err_stats_show, inode->i_private);
+}
+
+static const struct file_operations edma_debugfs_misc_file_ops = {
+	.open = edma_debugs_err_stats_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = seq_release
+};
+
+/**
+ * edma_debugfs_teardown - EDMA debugfs teardown.
+ *
+ * EDMA debugfs teardown and free stats memory.
+ */
+void edma_debugfs_teardown(void)
+{
+	/* Free EDMA miscellaneous stats memory */
+	edma_err_stats_free();
+
+	debugfs_remove_recursive(edma_dentry);
+	edma_dentry = NULL;
+	stats_dentry = NULL;
+}
+
+/**
+ * edma_debugfs_setup - EDMA debugfs setup.
+ * @ppe_dev: PPE Device
+ *
+ * EDMA debugfs setup.
+ */
+int edma_debugfs_setup(struct ppe_device *ppe_dev)
+{
+	edma_dentry = debugfs_create_dir("edma", ppe_dev->debugfs_root);
+	if (!edma_dentry) {
+		pr_err("Unable to create debugfs edma directory in debugfs\n");
+		goto debugfs_dir_failed;
+	}
+
+	stats_dentry = debugfs_create_dir("stats", edma_dentry);
+	if (!stats_dentry) {
+		pr_err("Unable to create debugfs stats directory in debugfs\n");
+		goto debugfs_dir_failed;
+	}
+
+	if (!debugfs_create_file("rx_ring_stats", 0444, stats_dentry,
+				 NULL, &edma_debugfs_rx_rings_file_ops)) {
+		pr_err("Unable to create Rx rings statistics file entry in debugfs\n");
+		goto debugfs_dir_failed;
+	}
+
+	if (!debugfs_create_file("tx_ring_stats", 0444, stats_dentry,
+				 NULL, &edma_debugfs_tx_rings_file_ops)) {
+		pr_err("Unable to create Tx rings statistics file entry in debugfs\n");
+		goto debugfs_dir_failed;
+	}
+
+	/* Allocate memory for EDMA miscellaneous stats */
+	if (edma_err_stats_alloc() < 0) {
+		pr_err("Unable to allocate miscellaneous percpu stats\n");
+		goto debugfs_dir_failed;
+	}
+
+	if (!debugfs_create_file("err_stats", 0444, stats_dentry,
+				 NULL, &edma_debugfs_misc_file_ops)) {
+		pr_err("Unable to create EDMA miscellaneous statistics file entry in debugfs\n");
+		goto debugfs_dir_failed;
+	}
+
+	return 0;
+
+debugfs_dir_failed:
+	debugfs_remove_recursive(edma_dentry);
+	edma_dentry = NULL;
+	stats_dentry = NULL;
+	return -ENOMEM;
+}
diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe_debugfs.c b/drivers/net/ethernet/qualcomm/ppe/ppe_debugfs.c
index 1cd4c491e724..f325fcf1e17e 100644
--- a/drivers/net/ethernet/qualcomm/ppe/ppe_debugfs.c
+++ b/drivers/net/ethernet/qualcomm/ppe/ppe_debugfs.c
@@ -6,9 +6,11 @@
 /* PPE debugfs routines for display of PPE counters useful for debug. */
 
 #include <linux/debugfs.h>
+#include <linux/netdevice.h>
 #include <linux/regmap.h>
 #include <linux/seq_file.h>
 
+#include "edma.h"
 #include "ppe.h"
 #include "ppe_config.h"
 #include "ppe_debugfs.h"
@@ -711,15 +713,30 @@ static const struct file_operations ppe_debugfs_packet_counter_fops = {
 
 void ppe_debugfs_setup(struct ppe_device *ppe_dev)
 {
+	int ret;
+
 	ppe_dev->debugfs_root = debugfs_create_dir("ppe", NULL);
 	debugfs_create_file("packet_counter", 0444,
 			    ppe_dev->debugfs_root,
 			    ppe_dev,
 			    &ppe_debugfs_packet_counter_fops);
+
+	if (!ppe_dev->debugfs_root) {
+		dev_err(ppe_dev->dev, "Error in PPE debugfs setup\n");
+		return;
+	}
+
+	ret = edma_debugfs_setup(ppe_dev);
+	if (ret) {
+		dev_err(ppe_dev->dev, "Error in EDMA debugfs setup API. ret: %d\n", ret);
+		debugfs_remove_recursive(ppe_dev->debugfs_root);
+		ppe_dev->debugfs_root = NULL;
+	}
 }
 
 void ppe_debugfs_teardown(struct ppe_device *ppe_dev)
 {
+	edma_debugfs_teardown();
 	debugfs_remove_recursive(ppe_dev->debugfs_root);
 	ppe_dev->debugfs_root = NULL;
 }
-- 
2.45.2