[PATCH v9 08/25] drivers: add BMI Tx statistics

Hemant Agrawal hemant.agrawal at nxp.com
Wed Aug 12 19:45:51 CEST 2026
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From: Jun Yang <jun.yang at nxp.com>

Add support for BMI (Buffer Manager Interface) Tx statistics
counters. Extend fman to read Tx BMI registers and expose
them through the xstats interface.

Signed-off-by: Jun Yang <jun.yang at nxp.com>
---
 drivers/bus/dpaa/base/fman/fman_hw.c |  7 +++++++
 drivers/bus/dpaa/include/fman.h      | 16 ++++++++++++++++
 drivers/net/dpaa/dpaa_ethdev.c       | 23 +++++++++++++++++++----
 drivers/net/dpaa/dpaa_ethdev.h       | 11 +++++++++--
 4 files changed, 51 insertions(+), 6 deletions(-)

diff --git a/drivers/bus/dpaa/base/fman/fman_hw.c b/drivers/bus/dpaa/base/fman/fman_hw.c
index 731ba6aa25..5e165b085c 100644
--- a/drivers/bus/dpaa/base/fman/fman_hw.c
+++ b/drivers/bus/dpaa/base/fman/fman_hw.c
@@ -324,6 +324,8 @@ fman_if_bmi_stats_get_all(struct fman_if *p, uint64_t *value)
 {
 	struct __fman_if *m = container_of(p, struct __fman_if, __if);
 	struct rx_bmi_regs *regs = (struct rx_bmi_regs *)m->rx_bmi_map;
+	struct tx_bmi_regs *tx_regs = (struct tx_bmi_regs *)m->tx_bmi_map;
+
 	int i = 0;
 
 	value[i++] = (u32)in_be32(&regs->fmbm_rfrc);
@@ -334,6 +336,11 @@ fman_if_bmi_stats_get_all(struct fman_if *p, uint64_t *value)
 	value[i++] = (u32)in_be32(&regs->fmbm_rfldec);
 	value[i++] = (u32)in_be32(&regs->fmbm_rodc);
 	value[i++] = (u32)in_be32(&regs->fmbm_rbdc);
+
+	value[i++] = (u32)in_be32(&tx_regs->fmbm_tfdc);
+	value[i++] = (u32)in_be32(&tx_regs->fmbm_tfledc);
+	value[i++] = (u32)in_be32(&tx_regs->fmbm_tfufdc);
+	value[i++] = (u32)in_be32(&tx_regs->fmbm_tbdc);
 }
 
 void
diff --git a/drivers/bus/dpaa/include/fman.h b/drivers/bus/dpaa/include/fman.h
index d949b38b8d..d34cced049 100644
--- a/drivers/bus/dpaa/include/fman.h
+++ b/drivers/bus/dpaa/include/fman.h
@@ -306,6 +306,13 @@ struct tx_bmi_regs {
 	uint32_t fmbm_tfene;		/**< Tx Frame Enqueue Next Engine*/
 	uint32_t fmbm_trlmts;		/**< Tx Rate Limiter Scale*/
 	uint32_t fmbm_trlmt;		/**< Tx Rate Limiter*/
+	uint32_t reserved0034[0x73];	/**< (0x034 - 0x1FF) */
+	uint32_t fmbm_tstc;		/**< Tx Statistics Counters*/
+	uint32_t fmbm_tfrc;		/**< Tx Frame Counter*/
+	uint32_t fmbm_tfdc;		/**< Tx Frames Discard Counter*/
+	uint32_t fmbm_tfledc;		/**< Tx Frames Length Error Discard Counter*/
+	uint32_t fmbm_tfufdc;		/**< Tx Frames Unsupported Format Discard Counter*/
+	uint32_t fmbm_tbdc;		/**< Tx Buffers Deallocate Counter*/
 };
 
 /* Description FM RTC timer alarm */
@@ -468,6 +475,15 @@ struct __fman_if {
 	void *qmi_map;
 };
 
+#define MEMMAC_REG_OFFSET(reg) offsetof(struct memac_regs, reg)
+#define BMI_RX_REG_OFFSET(reg) offsetof(struct rx_bmi_regs, reg)
+#define BMI_TX_REG_OFFSET(reg) offsetof(struct tx_bmi_regs, reg)
+
+#define FMAN_IF_BMI_RX_STAT_OFFSET_START BMI_RX_REG_OFFSET(fmbm_rfrc)
+#define FMAN_IF_BMI_RX_STAT_OFFSET_END BMI_RX_REG_OFFSET(fmbm_rbdc)
+#define FMAN_IF_BMI_TX_STAT_OFFSET_START BMI_TX_REG_OFFSET(fmbm_tfrc)
+#define FMAN_IF_BMI_TX_STAT_OFFSET_END BMI_TX_REG_OFFSET(fmbm_tbdc)
+
 /* And this is the base list node that the interfaces are added to. (See
  * fman_if_enable_all_rx() below for an example of its use.)
  */
diff --git a/drivers/net/dpaa/dpaa_ethdev.c b/drivers/net/dpaa/dpaa_ethdev.c
index cd3cd828e4..a03eb8f5f2 100644
--- a/drivers/net/dpaa/dpaa_ethdev.c
+++ b/drivers/net/dpaa/dpaa_ethdev.c
@@ -143,8 +143,23 @@ static const struct rte_dpaa_xstats_name_off dpaa_xstats_strings[] = {
 		offsetof(struct dpaa_if_rx_bmi_stats, fmbm_rodc)},
 	{"rx_buf_deallocate",
 		offsetof(struct dpaa_if_rx_bmi_stats, fmbm_rbdc)},
+	{"tx_bad_frames_count",
+		offsetof(struct dpaa_if_tx_bmi_stats, fmbm_tfdc)},
+	{"tx_frame_length_discard",
+		offsetof(struct dpaa_if_tx_bmi_stats, fmbm_tfledc)},
+	{"tx_frames_unsupported_format",
+		offsetof(struct dpaa_if_tx_bmi_stats, fmbm_tfufdc)},
+	{"tx_buf_deallocate",
+		offsetof(struct dpaa_if_tx_bmi_stats, fmbm_tbdc)},
 };
 
+/* Number of BMI entries at the tail of dpaa_xstats_strings[].
+ * Must equal RTE_DIM(dpaa_xstats_strings) - number_of_non_bmi_entries.
+ * Defined explicitly so that bmi_count does not silently drift if either
+ * dpaa_if_rx_bmi_stats or dpaa_if_tx_bmi_stats gains or loses a field.
+ */
+#define DPAA_BMI_XSTATS_COUNT 12
+
 static struct rte_dpaa_driver rte_dpaa_pmd;
 int dpaa_valid_dev;
 struct rte_mempool *dpaa_tx_sg_pool;
@@ -863,7 +878,7 @@ dpaa_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 {
 	unsigned int i = 0, j, num = RTE_DIM(dpaa_xstats_strings);
 	uint64_t values[sizeof(struct dpaa_if_stats) / 8];
-	unsigned int bmi_count = sizeof(struct dpaa_if_rx_bmi_stats) / 4;
+	unsigned int bmi_count = DPAA_BMI_XSTATS_COUNT;
 
 	if (n < num)
 		return num;
@@ -874,7 +889,7 @@ dpaa_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 	fman_if_stats_get_all(dev->process_private, values,
 			      sizeof(struct dpaa_if_stats) / 8);
 
-	for (i = 0; i < num - (bmi_count - 1); i++) {
+	for (i = 0; i < num - bmi_count; i++) {
 		xstats[i].id = i;
 		xstats[i].value = values[dpaa_xstats_strings[i].offset / 8];
 	}
@@ -912,7 +927,7 @@ dpaa_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 {
 	unsigned int i, j, stat_cnt = RTE_DIM(dpaa_xstats_strings);
 	uint64_t values_copy[sizeof(struct dpaa_if_stats) / 8];
-	unsigned int bmi_count = sizeof(struct dpaa_if_rx_bmi_stats) / 4;
+	unsigned int bmi_count = DPAA_BMI_XSTATS_COUNT;
 
 	if (!ids) {
 		if (n < stat_cnt)
@@ -924,7 +939,7 @@ dpaa_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 		fman_if_stats_get_all(dev->process_private, values_copy,
 				      sizeof(struct dpaa_if_stats) / 8);
 
-		for (i = 0; i < stat_cnt - (bmi_count - 1); i++)
+		for (i = 0; i < stat_cnt - bmi_count; i++)
 			values[i] =
 				values_copy[dpaa_xstats_strings[i].offset / 8];
 
diff --git a/drivers/net/dpaa/dpaa_ethdev.h b/drivers/net/dpaa/dpaa_ethdev.h
index f400030a5c..d342d98f23 100644
--- a/drivers/net/dpaa/dpaa_ethdev.h
+++ b/drivers/net/dpaa/dpaa_ethdev.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  *
  *   Copyright (c) 2014-2016 Freescale Semiconductor, Inc. All rights reserved.
- *   Copyright 2017-2024 NXP
+ *   Copyright 2017-2026 NXP
  *
  */
 #ifndef __DPAA_ETHDEV_H__
@@ -234,7 +234,6 @@ dpaa_rx_cb_atomic(void *event,
 		  void **bufs);
 
 struct dpaa_if_rx_bmi_stats {
-	uint32_t fmbm_rstc;		/**< Rx Statistics Counters*/
 	uint32_t fmbm_rfrc;		/**< Rx Frame Counter*/
 	uint32_t fmbm_rfbc;		/**< Rx Bad Frames Counter*/
 	uint32_t fmbm_rlfc;		/**< Rx Large Frames Counter*/
@@ -245,6 +244,14 @@ struct dpaa_if_rx_bmi_stats {
 	uint32_t fmbm_rbdc;		/**< Rx Buffers Deallocate Counter*/
 };
 
+struct dpaa_if_tx_bmi_stats {
+	uint32_t fmbm_tfrc;		/**< Tx Frame Counter*/
+	uint32_t fmbm_tfdc;		/**< Tx Frames Discard Counter*/
+	uint32_t fmbm_tfledc;	/**< Tx Frames Length Error Discard*/
+	uint32_t fmbm_tfufdc;	/**< Tx Frames Unsupported Format*/
+	uint32_t fmbm_tbdc;		/**< Tx Buffers Deallocate Counter */
+};
+
 int
 dpaa_tx_conf_queue_init(struct qman_fq *fq);
 
-- 
2.25.1
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