[dpdk-dev] [PATCH 12/40] bnxt: statistics operations

[Stephen Hurd <stephen.hurd@broadcom.com>]

Add get and clear staitstics operations and the asociated HWRM calls.

Signed-off-by: Stephen Hurd <stephen.hurd@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/Makefile              |   1 +
 drivers/net/bnxt/bnxt.h                |   5 +-
 drivers/net/bnxt/bnxt_cpr.c            |   5 +-
 drivers/net/bnxt/bnxt_cpr.h            |   2 -
 drivers/net/bnxt/bnxt_ethdev.c         |   3 +
 drivers/net/bnxt/bnxt_hwrm.c           |  49 ++++++++++++
 drivers/net/bnxt/bnxt_hwrm.h           |   8 +-
 drivers/net/bnxt/bnxt_rxq.c            |   1 +
 drivers/net/bnxt/bnxt_stats.c          | 142 +++++++++++++++++++++++++++++++++
 drivers/net/bnxt/bnxt_stats.h          |  44 ++++++++++
 drivers/net/bnxt/bnxt_txq.c            |   1 +
 drivers/net/bnxt/hsi_struct_def_dpdk.h | 107 +++++++++++++++++++++++++
 12 files changed, 358 insertions(+), 10 deletions(-)
 create mode 100644 drivers/net/bnxt/bnxt_stats.c
 create mode 100644 drivers/net/bnxt/bnxt_stats.h

diff --git a/drivers/net/bnxt/Makefile b/drivers/net/bnxt/Makefile
index 7320fac..de9ce76 100644
--- a/drivers/net/bnxt/Makefile
+++ b/drivers/net/bnxt/Makefile
@@ -54,6 +54,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_filter.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_hwrm.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_ring.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_rxq.c
+SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_stats.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_txq.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_vnic.c
 
diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 38b590b..96f162e 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -42,9 +42,6 @@
 #include <rte_lcore.h>
 #include <rte_spinlock.h>
 
-/* TODO make bnxt.def_cp_ring a pointer to avoid this... */
-#include "bnxt_cpr.h"
-
 #define BNXT_MAX_MTU		9000
 #define VLAN_TAG_SIZE		4
 
@@ -141,7 +138,7 @@ struct bnxt {
 	struct bnxt_tx_queue **tx_queues;
 
 	/* Default completion ring */
-	struct bnxt_cp_ring_info	def_cp_ring;
+	struct bnxt_cp_ring_info	*def_cp_ring;
 
 	unsigned		nr_vnics;
 
diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index ff82335..34e45ef 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -35,6 +35,7 @@
 #include "bnxt_cpr.h"
 #include "bnxt_hwrm.h"
 #include "bnxt_ring.h"
+#include "hsi_struct_def_dpdk.h"
 
 /*
  * Async event handling
@@ -118,7 +119,7 @@ reject:
 /* For the default completion ring only */
 void bnxt_free_def_cp_ring(struct bnxt *bp)
 {
-	struct bnxt_cp_ring_info *cpr = &bp->def_cp_ring;
+	struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 	struct bnxt_ring_struct *ring = cpr->cp_ring_struct;
 
 	bnxt_free_ring(ring);
@@ -127,7 +128,7 @@ void bnxt_free_def_cp_ring(struct bnxt *bp)
 /* For the default completion ring only */
 void bnxt_init_def_ring_struct(struct bnxt *bp)
 {
-	struct bnxt_cp_ring_info *cpr = &bp->def_cp_ring;
+	struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 	struct bnxt_ring_struct *ring = cpr->cp_ring_struct;
 
 	ring->bd = (void *)cpr->cp_desc_ring;
diff --git a/drivers/net/bnxt/bnxt_cpr.h b/drivers/net/bnxt/bnxt_cpr.h
index 878c7c9..e6333fc 100644
--- a/drivers/net/bnxt/bnxt_cpr.h
+++ b/drivers/net/bnxt/bnxt_cpr.h
@@ -34,8 +34,6 @@
 #ifndef _BNXT_CPR_H_
 #define _BNXT_CPR_H_
 
-#include "hsi_struct_def_dpdk.h"
-
 #define CMP_VALID(cmp, raw_cons, ring)					\
 	(!!(((struct cmpl_base *)(cmp))->info3_v & CMPL_BASE_V) ==	\
 	 !((raw_cons) & ((ring)->ring_size)))
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index df39fae..786318c 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -42,6 +42,7 @@
 #include "bnxt.h"
 #include "bnxt_hwrm.h"
 #include "bnxt_rxq.h"
+#include "bnxt_stats.h"
 #include "bnxt_txq.h"
 
 #define DRV_MODULE_NAME		"bnxt"
@@ -178,6 +179,8 @@ static int bnxt_dev_configure_op(struct rte_eth_dev *eth_dev)
 static struct eth_dev_ops bnxt_dev_ops = {
 	.dev_infos_get = bnxt_dev_info_get_op,
 	.dev_configure = bnxt_dev_configure_op,
+	.stats_get = bnxt_stats_get_op,
+	.stats_reset = bnxt_stats_reset_op,
 	.rx_queue_setup = bnxt_rx_queue_setup_op,
 	.rx_queue_release = bnxt_rx_queue_release_op,
 	.tx_queue_setup = bnxt_tx_queue_setup_op,
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 82139ca..50d8b89 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -39,8 +39,11 @@
 #include <rte_version.h>
 
 #include "bnxt.h"
+#include "bnxt_cpr.h"
 #include "bnxt_filter.h"
 #include "bnxt_hwrm.h"
+#include "bnxt_rxq.h"
+#include "bnxt_txq.h"
 #include "hsi_struct_def_dpdk.h"
 
 #define HWRM_CMD_TIMEOUT		2000
@@ -436,10 +439,56 @@ int bnxt_hwrm_queue_qportcfg(struct bnxt *bp)
 	return rc;
 }
 
+int bnxt_hwrm_stat_clear(struct bnxt *bp, struct bnxt_cp_ring_info *cpr)
+{
+	int rc = 0;
+	struct hwrm_stat_ctx_clr_stats_input req = {.req_type = 0 };
+	struct hwrm_stat_ctx_clr_stats_output *resp = bp->hwrm_cmd_resp_addr;
+
+	HWRM_PREP(req, STAT_CTX_CLR_STATS, -1, resp);
+
+	if (cpr->hw_stats_ctx_id == (uint32_t)HWRM_NA_SIGNATURE)
+		return rc;
+
+	req.stat_ctx_id = rte_cpu_to_le_16(cpr->hw_stats_ctx_id);
+	req.seq_id = rte_cpu_to_le_16(bp->hwrm_cmd_seq++);
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req));
+
+	HWRM_CHECK_RESULT;
+
+	return rc;
+}
+
 /*
  * HWRM utility functions
  */
 
+int bnxt_clear_all_hwrm_stat_ctxs(struct bnxt *bp)
+{
+	unsigned i;
+	int rc = 0;
+
+	for (i = 0; i < bp->rx_cp_nr_rings + bp->tx_cp_nr_rings; i++) {
+		struct bnxt_tx_queue *txq;
+		struct bnxt_rx_queue *rxq;
+		struct bnxt_cp_ring_info *cpr;
+
+		if (i >= bp->rx_cp_nr_rings) {
+			txq = bp->tx_queues[i - bp->rx_cp_nr_rings];
+			cpr = txq->cp_ring;
+		} else {
+			rxq = bp->rx_queues[i];
+			cpr = rxq->cp_ring;
+		}
+
+		rc = bnxt_hwrm_stat_clear(bp, cpr);
+		if (rc)
+			return rc;
+	}
+	return 0;
+}
+
 void bnxt_free_hwrm_resources(struct bnxt *bp)
 {
 	/* Release memzone */
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index c48ba3f..0861417 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -37,10 +37,11 @@
 #include <inttypes.h>
 #include <stdbool.h>
 
-#include "bnxt.h"
-
 #define HWRM_SEQ_ID_INVALID -1U
 
+struct bnxt;
+struct bnxt_filter_info;
+struct bnxt_cp_ring_info;
 int bnxt_hwrm_clear_filter(struct bnxt *bp,
 			   struct bnxt_filter_info *filter);
 
@@ -53,8 +54,11 @@ int bnxt_hwrm_func_driver_unregister(struct bnxt *bp, uint32_t flags);
 
 int bnxt_hwrm_queue_qportcfg(struct bnxt *bp);
 
+int bnxt_hwrm_stat_clear(struct bnxt *bp, struct bnxt_cp_ring_info *cpr);
+
 int bnxt_hwrm_ver_get(struct bnxt *bp);
 
+int bnxt_clear_all_hwrm_stat_ctxs(struct bnxt *bp);
 void bnxt_free_hwrm_resources(struct bnxt *bp);
 int bnxt_alloc_hwrm_resources(struct bnxt *bp);
 int bnxt_set_hwrm_link_config(struct bnxt *bp, bool link_up);
diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index 4ba5d75..b284e20 100644
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -36,6 +36,7 @@
 #include <rte_malloc.h>
 
 #include "bnxt.h"
+#include "bnxt_cpr.h"
 #include "bnxt_filter.h"
 #include "bnxt_hwrm.h"
 #include "bnxt_ring.h"
diff --git a/drivers/net/bnxt/bnxt_stats.c b/drivers/net/bnxt/bnxt_stats.c
new file mode 100644
index 0000000..e09956d
--- /dev/null
+++ b/drivers/net/bnxt/bnxt_stats.c
@@ -0,0 +1,142 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) Broadcom Limited.
+ *   All rights reserved.
+ *
+ *   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 Broadcom Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "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 THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS 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 <inttypes.h>
+
+#include <rte_byteorder.h>
+
+#include "bnxt.h"
+#include "bnxt_cpr.h"
+#include "bnxt_hwrm.h"
+#include "bnxt_rxq.h"
+#include "bnxt_stats.h"
+#include "bnxt_txq.h"
+#include "hsi_struct_def_dpdk.h"
+
+/*
+ * Statistics functions
+ */
+
+void bnxt_free_stats(struct bnxt *bp)
+{
+	int i;
+
+	for (i = 0; i < (int)bp->tx_cp_nr_rings; i++) {
+		struct bnxt_tx_queue *txq = bp->tx_queues[i];
+
+		bnxt_free_txq_stats(txq);
+	}
+	for (i = 0; i < (int)bp->rx_cp_nr_rings; i++) {
+		struct bnxt_rx_queue *rxq = bp->rx_queues[i];
+
+		bnxt_free_rxq_stats(rxq);
+	}
+}
+
+void bnxt_stats_get_op(struct rte_eth_dev *eth_dev,
+			   struct rte_eth_stats *bnxt_stats)
+{
+	unsigned i;
+	struct bnxt *bp = eth_dev->data->dev_private;
+
+	memset(bnxt_stats, 0, sizeof(*bnxt_stats));
+
+	for (i = 0; i < bp->rx_cp_nr_rings; i++) {
+		struct bnxt_rx_queue *rxq = bp->rx_queues[i];
+		struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
+		struct ctx_hw_stats64 *hw_stats =
+		    (struct ctx_hw_stats64 *)cpr->hw_stats;
+
+		bnxt_stats->q_ipackets[i] +=
+		    rte_le_to_cpu_64(hw_stats->rx_ucast_pkts);
+		bnxt_stats->q_ipackets[i] +=
+		    rte_le_to_cpu_64(hw_stats->rx_mcast_pkts);
+		bnxt_stats->q_ipackets[i] +=
+		    rte_le_to_cpu_64(hw_stats->rx_bcast_pkts);
+
+		bnxt_stats->q_ibytes[i] +=
+		    rte_le_to_cpu_64(hw_stats->rx_ucast_bytes);
+		bnxt_stats->q_ibytes[i] +=
+		    rte_le_to_cpu_64(hw_stats->rx_mcast_bytes);
+		bnxt_stats->q_ibytes[i] +=
+		    rte_le_to_cpu_64(hw_stats->rx_bcast_bytes);
+
+		/*
+		 * TBD: No clear mapping to this... we don't seem
+		 * to have a stat specifically for dropped due to
+		 * insufficient mbufs.
+		 */
+		bnxt_stats->q_errors[i] = 0;
+
+		/* These get replaced once the *_QSTATS commands work */
+		bnxt_stats->ipackets += bnxt_stats->q_ipackets[i];
+		bnxt_stats->ibytes += bnxt_stats->q_ibytes[i];
+		bnxt_stats->imissed += bnxt_stats->q_errors[i];
+		bnxt_stats->ierrors +=
+				rte_le_to_cpu_64(hw_stats->rx_err_pkts);
+	}
+
+	for (i = 0; i < bp->tx_cp_nr_rings; i++) {
+		struct bnxt_tx_queue *txq = bp->tx_queues[i];
+		struct bnxt_cp_ring_info *cpr = txq->cp_ring;
+		struct ctx_hw_stats64 *hw_stats =
+		    (struct ctx_hw_stats64 *)cpr->hw_stats;
+
+		bnxt_stats->q_opackets[i] +=
+		    rte_le_to_cpu_64(hw_stats->tx_ucast_pkts);
+		bnxt_stats->q_opackets[i] +=
+		    rte_le_to_cpu_64(hw_stats->tx_mcast_pkts);
+		bnxt_stats->q_opackets[i] +=
+		    rte_le_to_cpu_64(hw_stats->tx_bcast_pkts);
+
+		bnxt_stats->q_obytes[i] +=
+		    rte_le_to_cpu_64(hw_stats->tx_ucast_bytes);
+		bnxt_stats->q_obytes[i] +=
+		    rte_le_to_cpu_64(hw_stats->tx_mcast_bytes);
+		bnxt_stats->q_obytes[i] +=
+		    rte_le_to_cpu_64(hw_stats->tx_bcast_bytes);
+
+		/* These get replaced once the *_QSTATS commands work */
+		bnxt_stats->opackets += bnxt_stats->q_opackets[i];
+		bnxt_stats->obytes +=  bnxt_stats->q_obytes[i];
+		bnxt_stats->oerrors += rte_le_to_cpu_64(hw_stats->tx_drop_pkts);
+		bnxt_stats->oerrors += rte_le_to_cpu_64(hw_stats->tx_err_pkts);
+	}
+}
+
+void bnxt_stats_reset_op(struct rte_eth_dev *eth_dev)
+{
+	struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
+
+	bnxt_clear_all_hwrm_stat_ctxs(bp);
+}
diff --git a/drivers/net/bnxt/bnxt_stats.h b/drivers/net/bnxt/bnxt_stats.h
new file mode 100644
index 0000000..65408a4
--- /dev/null
+++ b/drivers/net/bnxt/bnxt_stats.h
@@ -0,0 +1,44 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2014-2015 Broadcom Corporation.
+ *   All rights reserved.
+ *
+ *   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 Broadcom Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "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 THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS 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 _BNXT_STATS_H_
+#define _BNXT_STATS_H_
+
+#include <rte_ethdev.h>
+
+void bnxt_free_stats(struct bnxt *bp);
+void bnxt_stats_get_op(struct rte_eth_dev *eth_dev,
+			   struct rte_eth_stats *bnxt_stats);
+void bnxt_stats_reset_op(struct rte_eth_dev *eth_dev);
+
+#endif
diff --git a/drivers/net/bnxt/bnxt_txq.c b/drivers/net/bnxt/bnxt_txq.c
index cb3dd8e..a3648c2 100644
--- a/drivers/net/bnxt/bnxt_txq.c
+++ b/drivers/net/bnxt/bnxt_txq.c
@@ -36,6 +36,7 @@
 #include <rte_malloc.h>
 
 #include "bnxt.h"
+#include "bnxt_cpr.h"
 #include "bnxt_ring.h"
 #include "bnxt_txq.h"
 
diff --git a/drivers/net/bnxt/hsi_struct_def_dpdk.h b/drivers/net/bnxt/hsi_struct_def_dpdk.h
index c5ff9ff..989f533 100644
--- a/drivers/net/bnxt/hsi_struct_def_dpdk.h
+++ b/drivers/net/bnxt/hsi_struct_def_dpdk.h
@@ -34,6 +34,35 @@
 #ifndef _HSI_STRUCT_DEF_EXTERNAL_H_
 #define _HSI_STRUCT_DEF_EXTERNAL_H_
 
+/*
+ * per-context HW statistics -- chip view
+ */
+
+typedef struct ctx_hw_stats64 {
+	uint64_t rx_ucast_pkts;
+	uint64_t rx_mcast_pkts;
+	uint64_t rx_bcast_pkts;
+	uint64_t rx_drop_pkts;
+	uint64_t rx_err_pkts;
+	uint64_t rx_ucast_bytes;
+	uint64_t rx_mcast_bytes;
+	uint64_t rx_bcast_bytes;
+
+	uint64_t tx_ucast_pkts;
+	uint64_t tx_mcast_pkts;
+	uint64_t tx_bcast_pkts;
+	uint64_t tx_drop_pkts;
+	uint64_t tx_err_pkts;
+	uint64_t tx_ucast_bytes;
+	uint64_t tx_mcast_bytes;
+	uint64_t tx_bcast_bytes;
+
+	uint64_t tpa_pkts;
+	uint64_t tpa_bytes;
+	uint64_t tpa_events;
+	uint64_t tpa_aborts;
+} ctx_hw_stats64_t;
+
 /* HW Resource Manager Specification 1.2.0 */
 #define HWRM_VERSION_MAJOR	1
 #define HWRM_VERSION_MINOR	2
@@ -63,6 +92,7 @@
 #define HWRM_CFA_L2_FILTER_FREE		(UINT32_C(0x91))
 #define HWRM_CFA_L2_FILTER_CFG		(UINT32_C(0x92))
 #define HWRM_CFA_L2_SET_RX_MASK		(UINT32_C(0x93))
+#define HWRM_STAT_CTX_CLR_STATS		(UINT32_C(0xb3))
 #define HWRM_EXEC_FWD_RESP		(UINT32_C(0xd0))
 
 /* Return Codes */
@@ -1946,6 +1976,83 @@ struct hwrm_queue_qportcfg_input {
 	uint16_t unused_0;
 } __attribute__((packed));
 
+/* hwrm_stat_ctx_clr_stats */
+/* Description: This command clears statistics of a context. */
+
+/* Input (24 bytes) */
+struct hwrm_stat_ctx_clr_stats_input {
+	/*
+	 * This value indicates what type of request this is. The format for the
+	 * rest of the command is determined by this field.
+	 */
+	uint16_t req_type;
+
+	/*
+	 * This value indicates the what completion ring the request will be
+	 * optionally completed on. If the value is -1, then no CR completion
+	 * will be generated. Any other value must be a valid CR ring_id value
+	 * for this function.
+	 */
+	uint16_t cmpl_ring;
+
+	/* This value indicates the command sequence number. */
+	uint16_t seq_id;
+
+	/*
+	 * Target ID of this command. 0x0 - 0xFFF8 - Used for function ids
+	 * 0xFFF8 - 0xFFFE - Reserved for internal processors 0xFFFF - HWRM
+	 */
+	uint16_t target_id;
+
+	/*
+	 * This is the host address where the response will be written when the
+	 * request is complete. This area must be 16B aligned and must be
+	 * cleared to zero before the request is made.
+	 */
+	uint64_t resp_addr;
+
+	/* ID of the statistics context that is being queried. */
+	uint32_t stat_ctx_id;
+
+	uint32_t unused_0;
+} __attribute__((packed));
+
+/* Output (16 bytes) */
+struct hwrm_stat_ctx_clr_stats_output {
+	/*
+	 * Pass/Fail or error type Note: receiver to verify the in parameters,
+	 * and fail the call with an error when appropriate
+	 */
+	uint16_t error_code;
+
+	/* This field returns the type of original request. */
+	uint16_t req_type;
+
+	/* This field provides original sequence number of the command. */
+	uint16_t seq_id;
+
+	/*
+	 * This field is the length of the response in bytes. The last byte of
+	 * the response is a valid flag that will read as '1' when the command
+	 * has been completely written to memory.
+	 */
+	uint16_t resp_len;
+
+	uint32_t unused_0;
+	uint8_t unused_1;
+	uint8_t unused_2;
+	uint8_t unused_3;
+
+	/*
+	 * This field is used in Output records to indicate that the output is
+	 * completely written to RAM. This field should be read as '1' to
+	 * indicate that the output has been completely written. When writing a
+	 * command completion or response to an internal processor, the order of
+	 * writes has to be such that this field is written last.
+	 */
+	uint8_t valid;
+} __attribute__((packed));
+
 /* hwrm_vnic_rss_cfg */
 /* Description: This function is used to enable RSS configuration. */
 
-- 
1.9.1