DPDK patches and discussions
 help / color / mirror / Atom feed
* [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control
@ 2021-12-04 17:24 jerinj
  2021-12-04 17:38 ` Stephen Hemminger
                   ` (2 more replies)
  0 siblings, 3 replies; 12+ messages in thread
From: jerinj @ 2021-12-04 17:24 UTC (permalink / raw)
  To: dev, Ray Kinsella, Thomas Monjalon, Ferruh Yigit, Andrew Rybchenko
  Cc: ajit.khaparde, aboyer, beilei.xing, bruce.richardson, chas3,
	chenbo.xia, ciara.loftus, dsinghrawat, ed.czeck, evgenys, grive,
	g.singh, zhouguoyang, haiyue.wang, hkalra, heinrich.kuhn,
	hemant.agrawal, hyonkim, igorch, irusskikh, jgrajcia,
	jasvinder.singh, jianwang, jiawenwu, jingjing.wu, johndale,
	john.miller, linville, keith.wiles, kirankumark, oulijun, lironh,
	longli, mw, spinler, matan, matt.peters, maxime.coquelin, mk,
	humin29, pnalla, ndabilpuram, qiming.yang, qi.z.zhang, radhac,
	rahul.lakkireddy, rmody, rosen.xu, sachin.saxena, skoteshwar,
	shshaikh, shaibran, shepard.siegel, asomalap, somnath.kotur,
	sthemmin, steven.webster, skori, mtetsuyah, vburru, viacheslavo,
	xiao.w.wang, cloud.wangxiaoyun, yisen.zhuang, yongwang,
	xuanziyang2, Jerin Jacob

From: Jerin Jacob <jerinj@marvell.com>

Based on device support and use-case need, there are two different ways
to enable PFC. The first case is the port level PFC configuration, in
this case, rte_eth_dev_priority_flow_ctrl_set() API shall be used to
configure the PFC, and PFC frames will be generated using based on VLAN
TC value.

The second case is the queue level PFC configuration, in this
case, Any packet field content can be used to steer the packet to the
specific queue using rte_flow or RSS and then use
rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping on each
queue. Based on congestion selected on the specific queue, configured TC
shall be used to generate PFC frames.

Operation of these modes are mutually exclusive, when driver sets
non zero value for rte_eth_dev_info::pfc_queue_tc_max,
application must use queue level PFC configuration via
rte_eth_dev_priority_flow_ctrl_queue_set() API instead of port level
PFC configuration via rte_eth_dev_priority_flow_ctrl_set() API to
realize PFC configuration.

This patch enables the configuration for second case a.k.a queue
based PFC also updates rte_eth_dev_priority_flow_ctrl_set()
implmentaion to adheher to rte_eth_dev_info::pfc_queue_tc_max
handling.

Also updated libabigail.abignore to ignore the update
to reserved fields in rte_eth_dev_info.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
---
 devtools/libabigail.abignore           |  6 ++
 doc/guides/nics/features.rst           |  5 +-
 doc/guides/rel_notes/release_22_03.rst |  4 ++
 lib/ethdev/ethdev_driver.h             |  6 +-
 lib/ethdev/rte_ethdev.c                | 73 ++++++++++++++++++++++++
 lib/ethdev/rte_ethdev.h                | 77 +++++++++++++++++++++++++-
 lib/ethdev/version.map                 |  3 +
 7 files changed, 168 insertions(+), 6 deletions(-)

diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore
index 4b676f317d..e5686115f7 100644
--- a/devtools/libabigail.abignore
+++ b/devtools/libabigail.abignore
@@ -11,3 +11,9 @@
 ; Ignore generated PMD information strings
 [suppress_variable]
         name_regexp = _pmd_info$
+
+; Ignore fields inserted in place of reserved fields of rte_eth_dev_info
+[suppress_type]
+       name = rte_eth_dev_info
+       has_data_member_inserted_between = {offset_after(switch_info), end}
+
diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 27be2d2576..6bb7337c58 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -379,9 +379,10 @@ Flow control
 Supports configuring link flow control.
 
 * **[implements] eth_dev_ops**: ``flow_ctrl_get``, ``flow_ctrl_set``,
-  ``priority_flow_ctrl_set``.
+  ``priority_flow_ctrl_set``, ``priority_flow_ctrl_queue_set_t``.
 * **[related]    API**: ``rte_eth_dev_flow_ctrl_get()``, ``rte_eth_dev_flow_ctrl_set()``,
-  ``rte_eth_dev_priority_flow_ctrl_set()``.
+  ``rte_eth_dev_priority_flow_ctrl_set()``, ``rte_eth_dev_priority_flow_ctrl_queue_set()``.
+* **[provides]   rte_eth_dev_info**: ``pfc_queue_tc_max``.
 
 
 .. _nic_features_rate_limitation:
diff --git a/doc/guides/rel_notes/release_22_03.rst b/doc/guides/rel_notes/release_22_03.rst
index 6d99d1eaa9..f336ee2996 100644
--- a/doc/guides/rel_notes/release_22_03.rst
+++ b/doc/guides/rel_notes/release_22_03.rst
@@ -55,6 +55,10 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added an API to enable queue based priority flow ctrl(PFC).**
+
+  A new API, ``rte_eth_dev_priority_flow_ctrl_queue_set()``, was added.
+
 
 Removed Items
 -------------
diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index d95605a355..0cbd434152 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -532,6 +532,9 @@ typedef int (*flow_ctrl_set_t)(struct rte_eth_dev *dev,
 /** @internal Setup priority flow control parameter on an Ethernet device. */
 typedef int (*priority_flow_ctrl_set_t)(struct rte_eth_dev *dev,
 				struct rte_eth_pfc_conf *pfc_conf);
+/** @internal Queue setup for priority flow control parameter on an Ethernet device. */
+typedef int (*priority_flow_ctrl_queue_set_t)(struct rte_eth_dev *dev,
+		uint16_t queue_id, struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 
 /** @internal Update RSS redirection table on an Ethernet device. */
 typedef int (*reta_update_t)(struct rte_eth_dev *dev,
@@ -1080,7 +1083,8 @@ struct eth_dev_ops {
 	flow_ctrl_set_t            flow_ctrl_set; /**< Setup flow control */
 	/** Setup priority flow control */
 	priority_flow_ctrl_set_t   priority_flow_ctrl_set;
-
+	/** Priority flow control queue setup */
+	priority_flow_ctrl_queue_set_t   priority_flow_ctrl_queue_set;
 	/** Set Unicast Table Array */
 	eth_uc_hash_table_set_t    uc_hash_table_set;
 	/** Set Unicast hash bitmap */
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index a1d475a292..86e0adac24 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -3998,7 +3998,9 @@ int
 rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 				   struct rte_eth_pfc_conf *pfc_conf)
 {
+	struct rte_eth_dev_info dev_info;
 	struct rte_eth_dev *dev;
+	int ret;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
@@ -4010,6 +4012,17 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 		return -EINVAL;
 	}
 
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max != 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u driver does not support port level PFC config\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
 	if (pfc_conf->priority > (RTE_ETH_DCB_NUM_USER_PRIORITIES - 1)) {
 		RTE_ETHDEV_LOG(ERR, "Invalid priority, only 0-7 allowed\n");
 		return -EINVAL;
@@ -4022,6 +4035,66 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 	return -ENOTSUP;
 }
 
+int
+rte_eth_dev_priority_flow_ctrl_queue_set(
+	uint16_t port_id, uint16_t queue_id,
+	struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_dev *dev;
+	int ret;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+	dev = &rte_eth_devices[port_id];
+
+	if (pfc_queue_conf == NULL) {
+		RTE_ETHDEV_LOG(ERR,
+			"Cannot set ethdev port %u queue %d PFC from NULL config\n",
+			port_id, queue_id);
+		return -EINVAL;
+	}
+
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max == 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u driver does not support PFC TC values\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
+	if (pfc_queue_conf->mode != RTE_ETH_FC_TX_PAUSE &&
+	    queue_id >= dev_info.nb_rx_queues) {
+		RTE_ETHDEV_LOG(ERR,
+			"PFC Rx queue not in range(requested: %d configured: %d)\n",
+			queue_id, dev_info.nb_rx_queues);
+		return -EINVAL;
+	}
+
+	if (pfc_queue_conf->mode != RTE_ETH_FC_RX_PAUSE &&
+	    queue_id >= dev_info.nb_tx_queues) {
+		RTE_ETHDEV_LOG(ERR,
+			"PFC Tx queue not in range(requested: %d configured: %d)\n",
+			queue_id, dev_info.nb_tx_queues);
+		return -EINVAL;
+	}
+
+	if (pfc_queue_conf->tc >= dev_info.pfc_queue_tc_max) {
+		RTE_ETHDEV_LOG(ERR,
+			"PFC TC not in range(requested: %d max: %d)\n",
+			pfc_queue_conf->tc, dev_info.pfc_queue_tc_max);
+		return -EINVAL;
+	}
+
+	if (*dev->dev_ops->priority_flow_ctrl_queue_set)
+		return eth_err(port_id,
+			       (*dev->dev_ops->priority_flow_ctrl_queue_set)(
+				       dev, queue_id, pfc_queue_conf));
+	return -ENOTSUP;
+}
+
 static int
 eth_check_reta_mask(struct rte_eth_rss_reta_entry64 *reta_conf,
 			uint16_t reta_size)
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index fa299c8ad7..b40e54576f 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -1395,6 +1395,19 @@ struct rte_eth_pfc_conf {
 	uint8_t priority;          /**< VLAN User Priority. */
 };
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to configure Ethernet priority flow control parameter for
+ * ethdev queues.
+ */
+struct rte_eth_pfc_queue_conf {
+	uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) specification */
+	uint16_t pause_time;  /**< Pause quota in the Pause frame */
+	enum rte_eth_fc_mode mode;  /**< Link flow control mode */
+};
+
 /**
  * Tunnel type for device-specific classifier configuration.
  * @see rte_eth_udp_tunnel
@@ -1841,8 +1854,30 @@ struct rte_eth_dev_info {
 	 * embedded managed interconnect/switch.
 	 */
 	struct rte_eth_switch_info switch_info;
-
-	uint64_t reserved_64s[2]; /**< Reserved for future fields */
+	/**
+	 * Maximum supported traffic class as per PFC (802.1Qbb) specification.
+	 *
+	 * Based on device support and use-case need, there are two different
+	 * ways to enable PFC. The first case is the port level PFC
+	 * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
+	 * API shall be used to configure the PFC, and PFC frames will be
+	 * generated using based on VLAN TC value.
+	 * The second case is the queue level PFC configuration, in this case,
+	 * Any packet field content can be used to steer the packet to the
+	 * specific queue using rte_flow or RSS and then use
+	 * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
+	 * on each queue. Based on congestion selected on the specific queue,
+	 * configured TC shall be used to generate PFC frames.
+	 *
+	 * When set to non zero value, application must use queue level
+	 * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
+	 * instead of port level PFC configuration via
+	 * rte_eth_dev_priority_flow_ctrl_set() API to realize
+	 * PFC configuration.
+	 */
+	uint8_t pfc_queue_tc_max;
+	uint8_t reserved_8s[7];
+	uint64_t reserved_64s[1]; /**< Reserved for future fields */
 	void *reserved_ptrs[2];   /**< Reserved for future fields */
 };
 
@@ -4109,6 +4144,9 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  * Configure the Ethernet priority flow control under DCB environment
  * for Ethernet device.
  *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority
+ * flow control usage models.
+ *
  * @param port_id
  * The port identifier of the Ethernet device.
  * @param pfc_conf
@@ -4119,10 +4157,43 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  *   - (-ENODEV)  if *port_id* invalid.
  *   - (-EINVAL)  if bad parameter
  *   - (-EIO)     if flow control setup failure or device is removed.
+ *
  */
 int rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
-				struct rte_eth_pfc_conf *pfc_conf);
+				       struct rte_eth_pfc_conf *pfc_conf);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Configure the Ethernet priority flow control for a given queue
+ * for Ethernet device.
+ *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority flow control
+ * usage models.
+ *
+ * @note When an ethdev port switches to PFC mode, the unconfigured
+ * queues shall be configured by the driver with default values such as
+ * lower priority value for TC etc.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param queue_id
+ *   The Rx/Tx queue to apply the PFC configuration.
+ *   @note pfc_queue_conf::mode depicts the queue direction(Rx and/or Tx)
+ * @param pfc_queue_conf
+ *   The pointer to the structure of the priority flow control parameters
+ *   for the queue.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENOTSUP) if hardware doesn't support priority flow control mode.
+ *   - (-ENODEV)  if *port_id* invalid.
+ *   - (-EINVAL)  if bad parameter
+ *   - (-EIO)     if flow control setup queue failure
+ */
+__rte_experimental
+int rte_eth_dev_priority_flow_ctrl_queue_set(uint16_t port_id, uint16_t queue_id,
+					     struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 /**
  * Add a MAC address to the set used for filtering incoming packets.
  *
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index c2fb0669a4..8f361ec15a 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -256,6 +256,9 @@ EXPERIMENTAL {
 	rte_flow_flex_item_create;
 	rte_flow_flex_item_release;
 	rte_flow_pick_transfer_proxy;
+
+	# added in 22.03
+	rte_eth_dev_priority_flow_ctrl_queue_set;
 };
 
 INTERNAL {
-- 
2.34.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control
  2021-12-04 17:24 [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control jerinj
@ 2021-12-04 17:38 ` Stephen Hemminger
  2021-12-05  7:03   ` Jerin Jacob
  2022-01-09 10:54 ` [PATCH v1 1/2] " skori
  2022-01-09 10:58 ` [PATCH v1 1/2] ethdev: support queue-based priority flow control skori
  2 siblings, 1 reply; 12+ messages in thread
From: Stephen Hemminger @ 2021-12-04 17:38 UTC (permalink / raw)
  To: jerinj
  Cc: dev, Ray Kinsella, Thomas Monjalon, Ferruh Yigit,
	Andrew Rybchenko, ajit.khaparde, aboyer, beilei.xing,
	bruce.richardson, chas3, chenbo.xia, ciara.loftus, dsinghrawat,
	ed.czeck, evgenys, grive, g.singh, zhouguoyang, haiyue.wang,
	hkalra, heinrich.kuhn, hemant.agrawal, hyonkim, igorch,
	irusskikh, jgrajcia, jasvinder.singh, jianwang, jiawenwu,
	jingjing.wu, johndale, john.miller, linville, keith.wiles,
	kirankumark, oulijun, lironh, longli, mw, spinler, matan,
	matt.peters, maxime.coquelin, mk, humin29, pnalla, ndabilpuram,
	qiming.yang, qi.z.zhang, radhac, rahul.lakkireddy, rmody,
	rosen.xu, sachin.saxena, skoteshwar, shshaikh, shaibran,
	shepard.siegel, asomalap, somnath.kotur, sthemmin,
	steven.webster, skori, mtetsuyah, vburru, viacheslavo,
	xiao.w.wang, cloud.wangxiaoyun, yisen.zhuang, yongwang,
	xuanziyang2

On Sat, 4 Dec 2021 22:54:58 +0530
<jerinj@marvell.com> wrote:

> +	/**
> +	 * Maximum supported traffic class as per PFC (802.1Qbb) specification.
> +	 *
> +	 * Based on device support and use-case need, there are two different
> +	 * ways to enable PFC. The first case is the port level PFC
> +	 * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
> +	 * API shall be used to configure the PFC, and PFC frames will be
> +	 * generated using based on VLAN TC value.
> +	 * The second case is the queue level PFC configuration, in this case,
> +	 * Any packet field content can be used to steer the packet to the
> +	 * specific queue using rte_flow or RSS and then use
> +	 * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
> +	 * on each queue. Based on congestion selected on the specific queue,
> +	 * configured TC shall be used to generate PFC frames.
> +	 *
> +	 * When set to non zero value, application must use queue level
> +	 * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
> +	 * instead of port level PFC configuration via
> +	 * rte_eth_dev_priority_flow_ctrl_set() API to realize
> +	 * PFC configuration.
> +	 */
> +	uint8_t pfc_queue_tc_max;
> +	uint8_t reserved_8s[7];
> +	uint64_t reserved_64s[1]; /**< Reserved for future fields */
>  	void *reserved_ptrs[2];   /**< Reserved for future fields */

Not sure you can claim ABI compatibility because the previous versions of DPDK
did not enforce that reserved fields must be zero.  The Linux kernel
learned this when adding flags for new system calls; reserved fields only
work if you enforce that application must set them to zero.

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control
  2021-12-04 17:38 ` Stephen Hemminger
@ 2021-12-05  7:03   ` Jerin Jacob
  2021-12-05 18:00     ` Stephen Hemminger
  0 siblings, 1 reply; 12+ messages in thread
From: Jerin Jacob @ 2021-12-05  7:03 UTC (permalink / raw)
  To: Stephen Hemminger
  Cc: Jerin Jacob, dpdk-dev, Ray Kinsella, Thomas Monjalon,
	Ferruh Yigit, Andrew Rybchenko, Ajit Khaparde, Andrew Boyer,
	Beilei Xing, Richardson, Bruce, Chas Williams, Xia, Chenbo,
	Ciara Loftus, Devendra Singh Rawat, Ed Czeck, Evgeny Schemeilin,
	Gaetan Rivet, Gagandeep Singh, Guoyang Zhou, Haiyue Wang,
	Harman Kalra, heinrich.kuhn, Hemant Agrawal, Hyong Youb Kim,
	Igor Chauskin, Igor Russkikh, Jakub Grajciar, Jasvinder Singh,
	Jian Wang, Jiawen Wu, Jingjing Wu, John Daley, John Miller,
	John W. Linville, Wiles, Keith, Kiran Kumar K, Lijun Ou,
	Liron Himi, Long Li, Marcin Wojtas, Martin Spinler, Matan Azrad,
	Matt Peters, Maxime Coquelin, Michal Krawczyk, Min Hu (Connor,
	Pradeep Kumar Nalla, Nithin Dabilpuram, Qiming Yang, Qi Zhang,
	Radha Mohan Chintakuntla, Rahul Lakkireddy, Rasesh Mody,
	Rosen Xu, Sachin Saxena, Satha Koteswara Rao Kottidi,
	Shahed Shaikh, Shai Brandes, Shepard Siegel,
	Somalapuram Amaranath, Somnath Kotur, Stephen Hemminger,
	Steven Webster, Sunil Kumar Kori, Tetsuya Mukawa,
	Veerasenareddy Burru, Viacheslav Ovsiienko, Xiao Wang,
	Xiaoyun Wang, Yisen Zhuang, Yong Wang, Ziyang Xuan

On Sat, Dec 4, 2021 at 11:08 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> On Sat, 4 Dec 2021 22:54:58 +0530
> <jerinj@marvell.com> wrote:
>
> > +     /**
> > +      * Maximum supported traffic class as per PFC (802.1Qbb) specification.
> > +      *
> > +      * Based on device support and use-case need, there are two different
> > +      * ways to enable PFC. The first case is the port level PFC
> > +      * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
> > +      * API shall be used to configure the PFC, and PFC frames will be
> > +      * generated using based on VLAN TC value.
> > +      * The second case is the queue level PFC configuration, in this case,
> > +      * Any packet field content can be used to steer the packet to the
> > +      * specific queue using rte_flow or RSS and then use
> > +      * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
> > +      * on each queue. Based on congestion selected on the specific queue,
> > +      * configured TC shall be used to generate PFC frames.
> > +      *
> > +      * When set to non zero value, application must use queue level
> > +      * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
> > +      * instead of port level PFC configuration via
> > +      * rte_eth_dev_priority_flow_ctrl_set() API to realize
> > +      * PFC configuration.
> > +      */
> > +     uint8_t pfc_queue_tc_max;
> > +     uint8_t reserved_8s[7];
> > +     uint64_t reserved_64s[1]; /**< Reserved for future fields */
> >       void *reserved_ptrs[2];   /**< Reserved for future fields */
>
> Not sure you can claim ABI compatibility because the previous versions of DPDK
> did not enforce that reserved fields must be zero.  The Linux kernel
> learned this when adding flags for new system calls; reserved fields only
> work if you enforce that application must set them to zero.

In this case it rte_eth_dev_info is an out parameter and implementation of
rte_eth_dev_info_get() already memseting to 0.
Do you still see any other ABI issue?

See rte_eth_dev_info_get()
        /*
         * Init dev_info before port_id check since caller does not have
         * return status and does not know if get is successful or not.
         */
        memset(dev_info, 0, sizeof(struct rte_eth_dev_info));

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control
  2021-12-05  7:03   ` Jerin Jacob
@ 2021-12-05 18:00     ` Stephen Hemminger
  2021-12-06  9:57       ` Jerin Jacob
  0 siblings, 1 reply; 12+ messages in thread
From: Stephen Hemminger @ 2021-12-05 18:00 UTC (permalink / raw)
  To: Jerin Jacob
  Cc: Jerin Jacob, dpdk-dev, Ray Kinsella, Thomas Monjalon,
	Ferruh Yigit, Andrew Rybchenko, Ajit Khaparde, Andrew Boyer,
	Beilei Xing, Richardson, Bruce, Chas Williams, Xia, Chenbo,
	Ciara Loftus, Devendra Singh Rawat, Ed Czeck, Evgeny Schemeilin,
	Gaetan Rivet, Gagandeep Singh, Guoyang Zhou, Haiyue Wang,
	Harman Kalra, heinrich.kuhn, Hemant Agrawal, Hyong Youb Kim,
	Igor Chauskin, Igor Russkikh, Jakub Grajciar, Jasvinder Singh,
	Jian Wang, Jiawen Wu, Jingjing Wu, John Daley, John Miller,
	John W. Linville, Wiles, Keith, Kiran Kumar K, Lijun Ou,
	Liron Himi, Long Li, Marcin Wojtas, Martin Spinler, Matan Azrad,
	Matt Peters, Maxime Coquelin, Michal Krawczyk, Min Hu (Connor,
	Pradeep Kumar Nalla, Nithin Dabilpuram, Qiming Yang, Qi Zhang,
	Radha Mohan Chintakuntla, Rahul Lakkireddy, Rasesh Mody,
	Rosen Xu, Sachin Saxena, Satha Koteswara Rao Kottidi,
	Shahed Shaikh, Shai Brandes, Shepard Siegel,
	Somalapuram Amaranath, Somnath Kotur, Stephen Hemminger,
	Steven Webster, Sunil Kumar Kori, Tetsuya Mukawa,
	Veerasenareddy Burru, Viacheslav Ovsiienko, Xiao Wang,
	Xiaoyun Wang, Yisen Zhuang, Yong Wang, Ziyang Xuan

On Sun, 5 Dec 2021 12:33:57 +0530
Jerin Jacob <jerinjacobk@gmail.com> wrote:

> On Sat, Dec 4, 2021 at 11:08 PM Stephen Hemminger
> <stephen@networkplumber.org> wrote:
> >
> > On Sat, 4 Dec 2021 22:54:58 +0530
> > <jerinj@marvell.com> wrote:
> >  
> > > +     /**
> > > +      * Maximum supported traffic class as per PFC (802.1Qbb) specification.
> > > +      *
> > > +      * Based on device support and use-case need, there are two different
> > > +      * ways to enable PFC. The first case is the port level PFC
> > > +      * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
> > > +      * API shall be used to configure the PFC, and PFC frames will be
> > > +      * generated using based on VLAN TC value.
> > > +      * The second case is the queue level PFC configuration, in this case,
> > > +      * Any packet field content can be used to steer the packet to the
> > > +      * specific queue using rte_flow or RSS and then use
> > > +      * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
> > > +      * on each queue. Based on congestion selected on the specific queue,
> > > +      * configured TC shall be used to generate PFC frames.
> > > +      *
> > > +      * When set to non zero value, application must use queue level
> > > +      * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
> > > +      * instead of port level PFC configuration via
> > > +      * rte_eth_dev_priority_flow_ctrl_set() API to realize
> > > +      * PFC configuration.
> > > +      */
> > > +     uint8_t pfc_queue_tc_max;
> > > +     uint8_t reserved_8s[7];
> > > +     uint64_t reserved_64s[1]; /**< Reserved for future fields */
> > >       void *reserved_ptrs[2];   /**< Reserved for future fields */  
> >
> > Not sure you can claim ABI compatibility because the previous versions of DPDK
> > did not enforce that reserved fields must be zero.  The Linux kernel
> > learned this when adding flags for new system calls; reserved fields only
> > work if you enforce that application must set them to zero.  
> 
> In this case it rte_eth_dev_info is an out parameter and implementation of
> rte_eth_dev_info_get() already memseting to 0.
> Do you still see any other ABI issue?
> 
> See rte_eth_dev_info_get()
>         /*
>          * Init dev_info before port_id check since caller does not have
>          * return status and does not know if get is successful or not.
>          */
>         memset(dev_info, 0, sizeof(struct rte_eth_dev_info));

The concern was from the misreading comment.  It talks about what application should do.
Could you reword the comment so that it describes what pfc_queue_tc_max is here
and move the flow control set part of the comment to where the API for that is.

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control
  2021-12-05 18:00     ` Stephen Hemminger
@ 2021-12-06  9:57       ` Jerin Jacob
  0 siblings, 0 replies; 12+ messages in thread
From: Jerin Jacob @ 2021-12-06  9:57 UTC (permalink / raw)
  To: Stephen Hemminger
  Cc: Jerin Jacob, dpdk-dev, Ray Kinsella, Thomas Monjalon,
	Ferruh Yigit, Andrew Rybchenko, Ajit Khaparde, Andrew Boyer,
	Beilei Xing, Richardson, Bruce, Chas Williams, Xia, Chenbo,
	Ciara Loftus, Devendra Singh Rawat, Ed Czeck, Evgeny Schemeilin,
	Gaetan Rivet, Gagandeep Singh, Guoyang Zhou, Haiyue Wang,
	Harman Kalra, heinrich.kuhn, Hemant Agrawal, Hyong Youb Kim,
	Igor Chauskin, Igor Russkikh, Jakub Grajciar, Jasvinder Singh,
	Jian Wang, Jiawen Wu, Jingjing Wu, John Daley, John Miller,
	John W. Linville, Wiles, Keith, Kiran Kumar K, Lijun Ou,
	Liron Himi, Long Li, Marcin Wojtas, Martin Spinler, Matan Azrad,
	Matt Peters, Maxime Coquelin, Michal Krawczyk, Min Hu (Connor,
	Pradeep Kumar Nalla, Nithin Dabilpuram, Qiming Yang, Qi Zhang,
	Radha Mohan Chintakuntla, Rahul Lakkireddy, Rasesh Mody,
	Rosen Xu, Sachin Saxena, Satha Koteswara Rao Kottidi,
	Shahed Shaikh, Shai Brandes, Shepard Siegel,
	Somalapuram Amaranath, Somnath Kotur, Stephen Hemminger,
	Steven Webster, Sunil Kumar Kori, Tetsuya Mukawa,
	Veerasenareddy Burru, Viacheslav Ovsiienko, Xiao Wang,
	Xiaoyun Wang, Yisen Zhuang, Yong Wang, Ziyang Xuan

On Sun, Dec 5, 2021 at 11:30 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> On Sun, 5 Dec 2021 12:33:57 +0530
> Jerin Jacob <jerinjacobk@gmail.com> wrote:
>
> > On Sat, Dec 4, 2021 at 11:08 PM Stephen Hemminger
> > <stephen@networkplumber.org> wrote:
> > >
> > > On Sat, 4 Dec 2021 22:54:58 +0530
> > > <jerinj@marvell.com> wrote:
> > >
> > > > +     /**
> > > > +      * Maximum supported traffic class as per PFC (802.1Qbb) specification.
> > > > +      *
> > > > +      * Based on device support and use-case need, there are two different
> > > > +      * ways to enable PFC. The first case is the port level PFC
> > > > +      * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
> > > > +      * API shall be used to configure the PFC, and PFC frames will be
> > > > +      * generated using based on VLAN TC value.
> > > > +      * The second case is the queue level PFC configuration, in this case,
> > > > +      * Any packet field content can be used to steer the packet to the
> > > > +      * specific queue using rte_flow or RSS and then use
> > > > +      * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
> > > > +      * on each queue. Based on congestion selected on the specific queue,
> > > > +      * configured TC shall be used to generate PFC frames.
> > > > +      *
> > > > +      * When set to non zero value, application must use queue level
> > > > +      * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
> > > > +      * instead of port level PFC configuration via
> > > > +      * rte_eth_dev_priority_flow_ctrl_set() API to realize
> > > > +      * PFC configuration.
> > > > +      */
> > > > +     uint8_t pfc_queue_tc_max;
> > > > +     uint8_t reserved_8s[7];
> > > > +     uint64_t reserved_64s[1]; /**< Reserved for future fields */
> > > >       void *reserved_ptrs[2];   /**< Reserved for future fields */
> > >
> > > Not sure you can claim ABI compatibility because the previous versions of DPDK
> > > did not enforce that reserved fields must be zero.  The Linux kernel
> > > learned this when adding flags for new system calls; reserved fields only
> > > work if you enforce that application must set them to zero.
> >
> > In this case it rte_eth_dev_info is an out parameter and implementation of
> > rte_eth_dev_info_get() already memseting to 0.
> > Do you still see any other ABI issue?
> >
> > See rte_eth_dev_info_get()
> >         /*
> >          * Init dev_info before port_id check since caller does not have
> >          * return status and does not know if get is successful or not.
> >          */
> >         memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
>
> The concern was from the misreading comment.  It talks about what application should do.
> Could you reword the comment so that it describes what pfc_queue_tc_max is here

The comment is at rte_eth_dev_info::pfc_queue_tc_max. So it is implied
that get pararamter.
current comment
---

+ * When set to non zero value, application must use queue level
+ * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
+ * instead of port level PFC configuration via
+ * rte_eth_dev_priority_flow_ctrl_set() API to realize
+ * PFC configuration.

---
Is updating to following help to clarify. If so, I will send v2, if
not, Please suggest.

---
+ * When set to non zero value by the driver, application must use queue level
                                                  ^^^^^^^^^^^
+ * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
+ * instead of port level PFC configuration via
+ * rte_eth_dev_priority_flow_ctrl_set() API to realize
+ * PFC configuration.
---

> and move the flow control set part of the comment to where the API for that is.

The comment is needed for rte_eth_dev_priority_flow_ctrl_set() and
rte_eth_dev_priority_flow_ctrl_queue_set().
Instead of duplicating the comments, I added the comment at
rte_eth_dev_info::pfc_queue_tc_max and
added "@see struct rte_eth_dev_info::pfc_queue_tc_max priority flow
control usage models"
in rte_eth_dev_priority_flow_ctrl_set() and
rte_eth_dev_priority_flow_ctrl_queue_set().

^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v1 1/2] ethdev: support queue-based priority flow control
  2021-12-04 17:24 [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control jerinj
  2021-12-04 17:38 ` Stephen Hemminger
@ 2022-01-09 10:54 ` skori
  2022-01-09 10:54   ` [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options skori
  2022-01-09 10:58 ` [PATCH v1 1/2] ethdev: support queue-based priority flow control skori
  2 siblings, 1 reply; 12+ messages in thread
From: skori @ 2022-01-09 10:54 UTC (permalink / raw)
  To: Ray Kinsella, Thomas Monjalon, Ferruh Yigit, Andrew Rybchenko
  Cc: dev, Sunil Kumar Kori, Jerin Jacob

From: Sunil Kumar Kori <skori@marvell.com>

Based on device support and use-case need, there are two different ways
to enable PFC. The first case is the port level PFC configuration, in
this case, rte_eth_dev_priority_flow_ctrl_set() API shall be used to
configure the PFC, and PFC frames will be generated using based on VLAN
TC value.

The second case is the queue level PFC configuration, in this
case, Any packet field content can be used to steer the packet to the
specific queue using rte_flow or RSS and then use
rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping on each
queue. Based on congestion selected on the specific queue, configured TC
shall be used to generate PFC frames.

Operation of these modes are mutually exclusive, when driver sets
non zero value for rte_eth_dev_info::pfc_queue_tc_max,
application must use queue level PFC configuration via
rte_eth_dev_priority_flow_ctrl_queue_set() API instead of port level
PFC configuration via rte_eth_dev_priority_flow_ctrl_set() API to
realize PFC configuration.

This patch enables the configuration for second case a.k.a queue
based PFC also updates rte_eth_dev_priority_flow_ctrl_set()
implmentaion to adheher to rte_eth_dev_info::pfc_queue_tc_max
handling.

Also updated libabigail.abignore to ignore the update
to reserved fields in rte_eth_dev_info.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
Change-Id: Ibd67e65914cc7c4164c779ba0a59fb807b6e2baa
---
v1:
 - Added queue based PFC config API instead port based

 devtools/libabigail.abignore           |   5 ++
 doc/guides/nics/features.rst           |   5 +-
 doc/guides/rel_notes/release_22_03.rst |   3 +
 lib/ethdev/ethdev_driver.h             |   6 +-
 lib/ethdev/rte_ethdev.c                | 109 +++++++++++++++++++++++++
 lib/ethdev/rte_ethdev.h                |  83 ++++++++++++++++++-
 lib/ethdev/version.map                 |   3 +
 7 files changed, 208 insertions(+), 6 deletions(-)

diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore
index 4b676f317d..1d29e60c06 100644
--- a/devtools/libabigail.abignore
+++ b/devtools/libabigail.abignore
@@ -11,3 +11,8 @@
 ; Ignore generated PMD information strings
 [suppress_variable]
         name_regexp = _pmd_info$
+
+; Ignore fields inserted in place of reserved fields of rte_eth_dev_info
+[suppress_type]
+       name = rte_eth_dev_info
+       has_data_member_inserted_between = {offset_after(switch_info), end}
diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 27be2d2576..277a784f4e 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -379,9 +379,10 @@ Flow control
 Supports configuring link flow control.
 
 * **[implements] eth_dev_ops**: ``flow_ctrl_get``, ``flow_ctrl_set``,
-  ``priority_flow_ctrl_set``.
+  ``priority_flow_ctrl_set``, ``priority_flow_ctrl_queue_set``.
 * **[related]    API**: ``rte_eth_dev_flow_ctrl_get()``, ``rte_eth_dev_flow_ctrl_set()``,
-  ``rte_eth_dev_priority_flow_ctrl_set()``.
+  ``rte_eth_dev_priority_flow_ctrl_set()``, ``rte_eth_dev_priority_flow_ctrl_queue_set()``.
+* **[provides]   rte_eth_dev_info**: ``pfc_queue_tc_max``.
 
 
 .. _nic_features_rate_limitation:
diff --git a/doc/guides/rel_notes/release_22_03.rst b/doc/guides/rel_notes/release_22_03.rst
index 6d99d1eaa9..b75c0356e6 100644
--- a/doc/guides/rel_notes/release_22_03.rst
+++ b/doc/guides/rel_notes/release_22_03.rst
@@ -55,6 +55,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added an API to enable queue based priority flow ctrl(PFC).**
+
+  A new API, ``rte_eth_dev_priority_flow_ctrl_queue_set()``, was added.
 
 Removed Items
 -------------
diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index d95605a355..e0bbfe89d7 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -532,6 +532,9 @@ typedef int (*flow_ctrl_set_t)(struct rte_eth_dev *dev,
 /** @internal Setup priority flow control parameter on an Ethernet device. */
 typedef int (*priority_flow_ctrl_set_t)(struct rte_eth_dev *dev,
 				struct rte_eth_pfc_conf *pfc_conf);
+/** @internal Queue setup for priority flow control parameter on an Ethernet device. */
+typedef int (*priority_flow_ctrl_queue_set_t)(struct rte_eth_dev *dev,
+				struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 
 /** @internal Update RSS redirection table on an Ethernet device. */
 typedef int (*reta_update_t)(struct rte_eth_dev *dev,
@@ -1080,7 +1083,8 @@ struct eth_dev_ops {
 	flow_ctrl_set_t            flow_ctrl_set; /**< Setup flow control */
 	/** Setup priority flow control */
 	priority_flow_ctrl_set_t   priority_flow_ctrl_set;
-
+	/** Priority flow control queue setup */
+	priority_flow_ctrl_queue_set_t   priority_flow_ctrl_queue_set;
 	/** Set Unicast Table Array */
 	eth_uc_hash_table_set_t    uc_hash_table_set;
 	/** Set Unicast hash bitmap */
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index a1d475a292..6def057720 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -3998,7 +3998,9 @@ int
 rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 				   struct rte_eth_pfc_conf *pfc_conf)
 {
+	struct rte_eth_dev_info dev_info;
 	struct rte_eth_dev *dev;
+	int ret;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
@@ -4010,6 +4012,17 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 		return -EINVAL;
 	}
 
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max != 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u driver does not support port level PFC config\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
 	if (pfc_conf->priority > (RTE_ETH_DCB_NUM_USER_PRIORITIES - 1)) {
 		RTE_ETHDEV_LOG(ERR, "Invalid priority, only 0-7 allowed\n");
 		return -EINVAL;
@@ -4022,6 +4035,102 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 	return -ENOTSUP;
 }
 
+static inline int
+validate_rx_pause_config(struct rte_eth_dev_info *dev_info,
+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	if ((pfc_queue_conf->mode == RTE_ETH_FC_RX_PAUSE) ||
+	    (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
+		if (pfc_queue_conf->rx_pause.tx_qid >= dev_info->nb_tx_queues) {
+			RTE_ETHDEV_LOG(ERR, "Tx queue not in range for Rx pause"
+				       " (requested: %d configured: %d)\n",
+				       pfc_queue_conf->rx_pause.tx_qid,
+				       dev_info->nb_tx_queues);
+			return -EINVAL;
+		}
+
+		if (pfc_queue_conf->rx_pause.tc >= dev_info->pfc_queue_tc_max) {
+			RTE_ETHDEV_LOG(ERR, "TC not in range for Rx pause"
+				       " (requested: %d max: %d)\n",
+				       pfc_queue_conf->rx_pause.tc,
+				       dev_info->pfc_queue_tc_max);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static inline int
+validate_tx_pause_config(struct rte_eth_dev_info *dev_info,
+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	if ((pfc_queue_conf->mode == RTE_ETH_FC_TX_PAUSE) ||
+	     (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
+		if (pfc_queue_conf->tx_pause.rx_qid >= dev_info->nb_rx_queues) {
+			RTE_ETHDEV_LOG(ERR, "Rx queue not in range for Tx pause"
+				       "(requested: %d configured: %d)\n",
+				       pfc_queue_conf->tx_pause.rx_qid,
+				       dev_info->nb_rx_queues);
+			return -EINVAL;
+		}
+
+		if (pfc_queue_conf->tx_pause.tc >= dev_info->pfc_queue_tc_max) {
+			RTE_ETHDEV_LOG(ERR, "TC not in range for Tx pause"
+				       "(requested: %d max: %d)\n",
+				       pfc_queue_conf->tx_pause.tc,
+				       dev_info->pfc_queue_tc_max);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+int
+rte_eth_dev_priority_flow_ctrl_queue_set(
+	uint16_t port_id, struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_dev *dev;
+	int ret;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+	dev = &rte_eth_devices[port_id];
+
+	if (pfc_queue_conf == NULL) {
+		RTE_ETHDEV_LOG(ERR, "PFC parameters are NULL for port (%u)\n",
+			       port_id);
+		return -EINVAL;
+	}
+
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max == 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u does not support PFC TC values\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
+	ret = validate_rx_pause_config(&dev_info, pfc_queue_conf);
+	if (ret != 0)
+		return ret;
+
+	ret = validate_tx_pause_config(&dev_info, pfc_queue_conf);
+	if (ret != 0)
+		return ret;
+
+
+	if (*dev->dev_ops->priority_flow_ctrl_queue_set)
+		return eth_err(port_id,
+			       (*dev->dev_ops->priority_flow_ctrl_queue_set)(
+				       dev, pfc_queue_conf));
+	return -ENOTSUP;
+}
+
 static int
 eth_check_reta_mask(struct rte_eth_rss_reta_entry64 *reta_conf,
 			uint16_t reta_size)
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index fa299c8ad7..d13b6df3b9 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -1395,6 +1395,28 @@ struct rte_eth_pfc_conf {
 	uint8_t priority;          /**< VLAN User Priority. */
 };
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to configure Ethernet priority flow control parameter for
+ * ethdev queues.
+ */
+struct rte_eth_pfc_queue_conf {
+	enum rte_eth_fc_mode mode;  /**< Link flow control mode */
+
+	struct {
+		uint16_t tx_qid;
+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
+	} rx_pause; /* Valid when (mode == FC_RX_PAUSE || mode == FC_FULL) */
+
+	struct {
+		uint16_t pause_time; /**< Pause quota in the Pause frame */
+		uint16_t rx_qid;
+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
+	} tx_pause; /* Valid when (mode == FC_TX_PAUSE || mode == FC_FULL) */
+};
+
 /**
  * Tunnel type for device-specific classifier configuration.
  * @see rte_eth_udp_tunnel
@@ -1841,8 +1863,30 @@ struct rte_eth_dev_info {
 	 * embedded managed interconnect/switch.
 	 */
 	struct rte_eth_switch_info switch_info;
-
-	uint64_t reserved_64s[2]; /**< Reserved for future fields */
+	/**
+	 * Maximum supported traffic class as per PFC (802.1Qbb) specification.
+	 *
+	 * Based on device support and use-case need, there are two different
+	 * ways to enable PFC. The first case is the port level PFC
+	 * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
+	 * API shall be used to configure the PFC, and PFC frames will be
+	 * generated using based on VLAN TC value.
+	 * The second case is the queue level PFC configuration, in this case,
+	 * Any packet field content can be used to steer the packet to the
+	 * specific queue using rte_flow or RSS and then use
+	 * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
+	 * on each queue. Based on congestion selected on the specific queue,
+	 * configured TC shall be used to generate PFC frames.
+	 *
+	 * When set to non zero value, application must use queue level
+	 * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
+	 * instead of port level PFC configuration via
+	 * rte_eth_dev_priority_flow_ctrl_set() API to realize
+	 * PFC configuration.
+	 */
+	uint8_t pfc_queue_tc_max;
+	uint8_t reserved_8s[7];
+	uint64_t reserved_64s[1]; /**< Reserved for future fields */
 	void *reserved_ptrs[2];   /**< Reserved for future fields */
 };
 
@@ -4109,6 +4153,9 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  * Configure the Ethernet priority flow control under DCB environment
  * for Ethernet device.
  *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority
+ * flow control usage models.
+ *
  * @param port_id
  * The port identifier of the Ethernet device.
  * @param pfc_conf
@@ -4119,10 +4166,40 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  *   - (-ENODEV)  if *port_id* invalid.
  *   - (-EINVAL)  if bad parameter
  *   - (-EIO)     if flow control setup failure or device is removed.
+ *
  */
 int rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
-				struct rte_eth_pfc_conf *pfc_conf);
+				       struct rte_eth_pfc_conf *pfc_conf);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Configure the Ethernet priority flow control for a given queue
+ * for Ethernet device.
+ *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority flow control
+ * usage models.
+ *
+ * @note When an ethdev port switches to PFC mode, the unconfigured
+ * queues shall be configured by the driver with default values such as
+ * lower priority value for TC etc.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param pfc_queue_conf
+ *   The pointer to the structure of the priority flow control parameters
+ *   for the queue.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENOTSUP) if hardware doesn't support priority flow control mode.
+ *   - (-ENODEV)  if *port_id* invalid.
+ *   - (-EINVAL)  if bad parameter
+ *   - (-EIO)     if flow control setup queue failure
+ */
+__rte_experimental
+int rte_eth_dev_priority_flow_ctrl_queue_set(uint16_t port_id,
+					     struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 /**
  * Add a MAC address to the set used for filtering incoming packets.
  *
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index c2fb0669a4..8f361ec15a 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -256,6 +256,9 @@ EXPERIMENTAL {
 	rte_flow_flex_item_create;
 	rte_flow_flex_item_release;
 	rte_flow_pick_transfer_proxy;
+
+	# added in 22.03
+	rte_eth_dev_priority_flow_ctrl_queue_set;
 };
 
 INTERNAL {
-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options
  2022-01-09 10:54 ` [PATCH v1 1/2] " skori
@ 2022-01-09 10:54   ` skori
  0 siblings, 0 replies; 12+ messages in thread
From: skori @ 2022-01-09 10:54 UTC (permalink / raw)
  To: Xiaoyun Li, Aman Singh; +Cc: dev, Sunil Kumar Kori

From: Sunil Kumar Kori <skori@marvell.com>

Patch adds command line options to configure queue based
priority flow control.

- Syntax command is given as below:

set pfc_queue_ctrl <port_id> rx <on|off> <tx_qid> <tx_tc> \
	tx <on|off> <rx_qid> <rx_tc> <pause_time>

- Example command to configure queue based priority flow control
  on rx and tx side for port 0, Rx queue 0, Tx queue 0 with pause
  time 2047

testpmd> set pfc_queue_ctrl 0 rx on 0 0 tx on 0 0 2047

Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
Change-Id: Ic6d0e3b1ba5f0a98ca7a5b7cafb0044c6c568b81
---
 app/test-pmd/cmdline.c                      | 122 ++++++++++++++++++++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  22 ++++
 2 files changed, 144 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 6e10afeedd..0240fcf9e7 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -544,6 +544,11 @@ static void cmd_help_long_parsed(void *parsed_result,
 			"    Set the priority flow control parameter on a"
 			" port.\n\n"
 
+			"set pfc_queue_ctrl (port_id) rx (on|off) (tx_qid)"
+			" (tx_tc) tx (on|off) (rx_qid) (rx_tc) (pause_time)\n"
+			"    Set the queue priority flow control parameter on a"
+			" given Rx and Tx queues of a port.\n\n"
+
 			"set stat_qmap (tx|rx) (port_id) (queue_id) (qmapping)\n"
 			"    Set statistics mapping (qmapping 0..15) for RX/TX"
 			" queue on port.\n"
@@ -7690,6 +7695,122 @@ cmdline_parse_inst_t cmd_priority_flow_control_set = {
 	},
 };
 
+struct cmd_queue_priority_flow_ctrl_set_result {
+	cmdline_fixed_string_t set;
+	cmdline_fixed_string_t pfc_queue_ctrl;
+	portid_t port_id;
+	cmdline_fixed_string_t rx;
+	cmdline_fixed_string_t rx_pfc_mode;
+	uint16_t tx_qid;
+	uint8_t  tx_tc;
+	cmdline_fixed_string_t tx;
+	cmdline_fixed_string_t tx_pfc_mode;
+	uint16_t rx_qid;
+	uint8_t  rx_tc;
+	uint16_t pause_time;
+};
+
+static void
+cmd_queue_priority_flow_ctrl_set_parsed(void *parsed_result,
+					__rte_unused struct cmdline *cl,
+					__rte_unused void *data)
+{
+	struct cmd_queue_priority_flow_ctrl_set_result *res = parsed_result;
+	struct rte_eth_pfc_queue_conf pfc_queue_conf;
+	int rx_fc_enable, tx_fc_enable;
+	int ret;
+
+	/*
+	 * Rx on/off, flow control is enabled/disabled on RX side. This can
+	 * indicate the RTE_ETH_FC_TX_PAUSE, Transmit pause frame at the Rx
+	 * side. Tx on/off, flow control is enabled/disabled on TX side. This
+	 * can indicate the RTE_ETH_FC_RX_PAUSE, Respond to the pause frame at
+	 * the Tx side.
+	 */
+	static enum rte_eth_fc_mode rx_tx_onoff_2_mode[2][2] = {
+		{RTE_ETH_FC_NONE, RTE_ETH_FC_TX_PAUSE},
+		{RTE_ETH_FC_RX_PAUSE, RTE_ETH_FC_FULL}
+	};
+
+	memset(&pfc_queue_conf, 0, sizeof(struct rte_eth_pfc_queue_conf));
+	rx_fc_enable = (!strncmp(res->rx_pfc_mode, "on", 2)) ? 1 : 0;
+	tx_fc_enable = (!strncmp(res->tx_pfc_mode, "on", 2)) ? 1 : 0;
+	pfc_queue_conf.mode = rx_tx_onoff_2_mode[rx_fc_enable][tx_fc_enable];
+	pfc_queue_conf.rx_pause.tc  = res->tx_tc;
+	pfc_queue_conf.rx_pause.tx_qid = res->tx_qid;
+	pfc_queue_conf.tx_pause.tc  = res->rx_tc;
+	pfc_queue_conf.tx_pause.rx_qid  = res->rx_qid;
+	pfc_queue_conf.tx_pause.pause_time = res->pause_time;
+
+	ret = rte_eth_dev_priority_flow_ctrl_queue_set(res->port_id,
+						       &pfc_queue_conf);
+	if (ret != 0) {
+		fprintf(stderr,
+			"bad queue priority flow control parameter, rc = %d\n",
+			ret);
+	}
+}
+
+cmdline_parse_token_string_t cmd_q_pfc_set_set =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				set, "set");
+cmdline_parse_token_string_t cmd_q_pfc_set_flow_ctrl =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				pfc_queue_ctrl, "pfc_queue_ctrl");
+cmdline_parse_token_num_t cmd_q_pfc_set_portid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				port_id, RTE_UINT16);
+cmdline_parse_token_string_t cmd_q_pfc_set_rx =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx, "rx");
+cmdline_parse_token_string_t cmd_q_pfc_set_rx_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_pfc_mode, "on#off");
+cmdline_parse_token_num_t cmd_q_pfc_set_tx_qid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_qid, RTE_UINT16);
+cmdline_parse_token_num_t cmd_q_pfc_set_tx_tc =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_tc, RTE_UINT8);
+cmdline_parse_token_string_t cmd_q_pfc_set_tx =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx, "tx");
+cmdline_parse_token_string_t cmd_q_pfc_set_tx_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_pfc_mode, "on#off");
+cmdline_parse_token_num_t cmd_q_pfc_set_rx_qid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_qid, RTE_UINT16);
+cmdline_parse_token_num_t cmd_q_pfc_set_rx_tc =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_tc, RTE_UINT8);
+cmdline_parse_token_num_t cmd_q_pfc_set_pause_time =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				pause_time, RTE_UINT16);
+
+cmdline_parse_inst_t cmd_queue_priority_flow_control_set = {
+	.f = cmd_queue_priority_flow_ctrl_set_parsed,
+	.data = NULL,
+	.help_str = "set pfc_queue_ctrl <port_id> rx <on|off> <tx_qid> <tx_tc> "
+		"tx <on|off> <rx_qid> <rx_tc> <pause_time>: "
+		"Configure the Ethernet queue priority flow control",
+	.tokens = {
+		(void *)&cmd_q_pfc_set_set,
+		(void *)&cmd_q_pfc_set_flow_ctrl,
+		(void *)&cmd_q_pfc_set_portid,
+		(void *)&cmd_q_pfc_set_rx,
+		(void *)&cmd_q_pfc_set_rx_mode,
+		(void *)&cmd_q_pfc_set_tx_qid,
+		(void *)&cmd_q_pfc_set_tx_tc,
+		(void *)&cmd_q_pfc_set_tx,
+		(void *)&cmd_q_pfc_set_tx_mode,
+		(void *)&cmd_q_pfc_set_rx_qid,
+		(void *)&cmd_q_pfc_set_rx_tc,
+		(void *)&cmd_q_pfc_set_pause_time,
+		NULL,
+	},
+};
+
 /* *** RESET CONFIGURATION *** */
 struct cmd_reset_result {
 	cmdline_fixed_string_t reset;
@@ -17765,6 +17886,7 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_set_autoneg,
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_show,
 	(cmdline_parse_inst_t *)&cmd_priority_flow_control_set,
+	(cmdline_parse_inst_t *)&cmd_queue_priority_flow_control_set,
 	(cmdline_parse_inst_t *)&cmd_config_dcb,
 	(cmdline_parse_inst_t *)&cmd_read_reg,
 	(cmdline_parse_inst_t *)&cmd_read_reg_bit_field,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 44228cd7d2..5ea2888adc 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -1561,6 +1561,28 @@ Where:
 
 * ``priority`` (0-7): VLAN User Priority.
 
+set pfc_queue_ctrl
+~~~~~~~~~~~~~~~~~~
+
+Set the priority flow control parameter on a given Rx and Tx queue of a port::
+
+   testpmd> set pfc_queue_ctrl <port_id> rx (on|off) <tx_qid> <tx_tc> \
+            tx (on|off) <rx_qid> <rx_tc> <pause_time>
+
+Where:
+
+* ``tx_qid`` (integer): Tx qid for which ``tx_tc`` will be applied and traffic
+  will be paused when PFC frame is received with ``tx_tc`` enabled.
+
+* ``tx_tc`` (0-15): TC for which traffic is to be paused for xmit.
+
+* ``rx_qid`` (integer): Rx qid for which threshold will be applied and PFC
+  frame will be generated with ``tx_tc`` when exceeds the threshold.
+
+* ``rx_tc`` (0-15): TC filled in PFC frame for which remote Tx is to be paused.
+
+* ``pause_time`` (integer): Pause quota filled in the PFC frame.
+
 set stat_qmap
 ~~~~~~~~~~~~~
 
-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v1 1/2] ethdev: support queue-based priority flow control
  2021-12-04 17:24 [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control jerinj
  2021-12-04 17:38 ` Stephen Hemminger
  2022-01-09 10:54 ` [PATCH v1 1/2] " skori
@ 2022-01-09 10:58 ` skori
  2022-01-09 10:58   ` [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options skori
                     ` (2 more replies)
  2 siblings, 3 replies; 12+ messages in thread
From: skori @ 2022-01-09 10:58 UTC (permalink / raw)
  To: Ray Kinsella, Thomas Monjalon, Ferruh Yigit, Andrew Rybchenko
  Cc: dev, Sunil Kumar Kori, Jerin Jacob

From: Sunil Kumar Kori <skori@marvell.com>

Based on device support and use-case need, there are two different ways
to enable PFC. The first case is the port level PFC configuration, in
this case, rte_eth_dev_priority_flow_ctrl_set() API shall be used to
configure the PFC, and PFC frames will be generated using based on VLAN
TC value.

The second case is the queue level PFC configuration, in this
case, Any packet field content can be used to steer the packet to the
specific queue using rte_flow or RSS and then use
rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping on each
queue. Based on congestion selected on the specific queue, configured TC
shall be used to generate PFC frames.

Operation of these modes are mutually exclusive, when driver sets
non zero value for rte_eth_dev_info::pfc_queue_tc_max,
application must use queue level PFC configuration via
rte_eth_dev_priority_flow_ctrl_queue_set() API instead of port level
PFC configuration via rte_eth_dev_priority_flow_ctrl_set() API to
realize PFC configuration.

This patch enables the configuration for second case a.k.a queue
based PFC also updates rte_eth_dev_priority_flow_ctrl_set()
implmentaion to adheher to rte_eth_dev_info::pfc_queue_tc_max
handling.

Also updated libabigail.abignore to ignore the update
to reserved fields in rte_eth_dev_info.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
---
v1:
 - Added queue based PFC config API instead port based

 devtools/libabigail.abignore           |   5 ++
 doc/guides/nics/features.rst           |   5 +-
 doc/guides/rel_notes/release_22_03.rst |   3 +
 lib/ethdev/ethdev_driver.h             |   6 +-
 lib/ethdev/rte_ethdev.c                | 109 +++++++++++++++++++++++++
 lib/ethdev/rte_ethdev.h                |  83 ++++++++++++++++++-
 lib/ethdev/version.map                 |   3 +
 7 files changed, 208 insertions(+), 6 deletions(-)

diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore
index 4b676f317d..1d29e60c06 100644
--- a/devtools/libabigail.abignore
+++ b/devtools/libabigail.abignore
@@ -11,3 +11,8 @@
 ; Ignore generated PMD information strings
 [suppress_variable]
         name_regexp = _pmd_info$
+
+; Ignore fields inserted in place of reserved fields of rte_eth_dev_info
+[suppress_type]
+       name = rte_eth_dev_info
+       has_data_member_inserted_between = {offset_after(switch_info), end}
diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 27be2d2576..277a784f4e 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -379,9 +379,10 @@ Flow control
 Supports configuring link flow control.
 
 * **[implements] eth_dev_ops**: ``flow_ctrl_get``, ``flow_ctrl_set``,
-  ``priority_flow_ctrl_set``.
+  ``priority_flow_ctrl_set``, ``priority_flow_ctrl_queue_set``.
 * **[related]    API**: ``rte_eth_dev_flow_ctrl_get()``, ``rte_eth_dev_flow_ctrl_set()``,
-  ``rte_eth_dev_priority_flow_ctrl_set()``.
+  ``rte_eth_dev_priority_flow_ctrl_set()``, ``rte_eth_dev_priority_flow_ctrl_queue_set()``.
+* **[provides]   rte_eth_dev_info**: ``pfc_queue_tc_max``.
 
 
 .. _nic_features_rate_limitation:
diff --git a/doc/guides/rel_notes/release_22_03.rst b/doc/guides/rel_notes/release_22_03.rst
index 6d99d1eaa9..b75c0356e6 100644
--- a/doc/guides/rel_notes/release_22_03.rst
+++ b/doc/guides/rel_notes/release_22_03.rst
@@ -55,6 +55,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added an API to enable queue based priority flow ctrl(PFC).**
+
+  A new API, ``rte_eth_dev_priority_flow_ctrl_queue_set()``, was added.
 
 Removed Items
 -------------
diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index d95605a355..e0bbfe89d7 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -532,6 +532,9 @@ typedef int (*flow_ctrl_set_t)(struct rte_eth_dev *dev,
 /** @internal Setup priority flow control parameter on an Ethernet device. */
 typedef int (*priority_flow_ctrl_set_t)(struct rte_eth_dev *dev,
 				struct rte_eth_pfc_conf *pfc_conf);
+/** @internal Queue setup for priority flow control parameter on an Ethernet device. */
+typedef int (*priority_flow_ctrl_queue_set_t)(struct rte_eth_dev *dev,
+				struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 
 /** @internal Update RSS redirection table on an Ethernet device. */
 typedef int (*reta_update_t)(struct rte_eth_dev *dev,
@@ -1080,7 +1083,8 @@ struct eth_dev_ops {
 	flow_ctrl_set_t            flow_ctrl_set; /**< Setup flow control */
 	/** Setup priority flow control */
 	priority_flow_ctrl_set_t   priority_flow_ctrl_set;
-
+	/** Priority flow control queue setup */
+	priority_flow_ctrl_queue_set_t   priority_flow_ctrl_queue_set;
 	/** Set Unicast Table Array */
 	eth_uc_hash_table_set_t    uc_hash_table_set;
 	/** Set Unicast hash bitmap */
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index a1d475a292..6def057720 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -3998,7 +3998,9 @@ int
 rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 				   struct rte_eth_pfc_conf *pfc_conf)
 {
+	struct rte_eth_dev_info dev_info;
 	struct rte_eth_dev *dev;
+	int ret;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
@@ -4010,6 +4012,17 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 		return -EINVAL;
 	}
 
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max != 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u driver does not support port level PFC config\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
 	if (pfc_conf->priority > (RTE_ETH_DCB_NUM_USER_PRIORITIES - 1)) {
 		RTE_ETHDEV_LOG(ERR, "Invalid priority, only 0-7 allowed\n");
 		return -EINVAL;
@@ -4022,6 +4035,102 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 	return -ENOTSUP;
 }
 
+static inline int
+validate_rx_pause_config(struct rte_eth_dev_info *dev_info,
+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	if ((pfc_queue_conf->mode == RTE_ETH_FC_RX_PAUSE) ||
+	    (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
+		if (pfc_queue_conf->rx_pause.tx_qid >= dev_info->nb_tx_queues) {
+			RTE_ETHDEV_LOG(ERR, "Tx queue not in range for Rx pause"
+				       " (requested: %d configured: %d)\n",
+				       pfc_queue_conf->rx_pause.tx_qid,
+				       dev_info->nb_tx_queues);
+			return -EINVAL;
+		}
+
+		if (pfc_queue_conf->rx_pause.tc >= dev_info->pfc_queue_tc_max) {
+			RTE_ETHDEV_LOG(ERR, "TC not in range for Rx pause"
+				       " (requested: %d max: %d)\n",
+				       pfc_queue_conf->rx_pause.tc,
+				       dev_info->pfc_queue_tc_max);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static inline int
+validate_tx_pause_config(struct rte_eth_dev_info *dev_info,
+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	if ((pfc_queue_conf->mode == RTE_ETH_FC_TX_PAUSE) ||
+	     (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
+		if (pfc_queue_conf->tx_pause.rx_qid >= dev_info->nb_rx_queues) {
+			RTE_ETHDEV_LOG(ERR, "Rx queue not in range for Tx pause"
+				       "(requested: %d configured: %d)\n",
+				       pfc_queue_conf->tx_pause.rx_qid,
+				       dev_info->nb_rx_queues);
+			return -EINVAL;
+		}
+
+		if (pfc_queue_conf->tx_pause.tc >= dev_info->pfc_queue_tc_max) {
+			RTE_ETHDEV_LOG(ERR, "TC not in range for Tx pause"
+				       "(requested: %d max: %d)\n",
+				       pfc_queue_conf->tx_pause.tc,
+				       dev_info->pfc_queue_tc_max);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+int
+rte_eth_dev_priority_flow_ctrl_queue_set(
+	uint16_t port_id, struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_dev *dev;
+	int ret;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+	dev = &rte_eth_devices[port_id];
+
+	if (pfc_queue_conf == NULL) {
+		RTE_ETHDEV_LOG(ERR, "PFC parameters are NULL for port (%u)\n",
+			       port_id);
+		return -EINVAL;
+	}
+
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max == 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u does not support PFC TC values\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
+	ret = validate_rx_pause_config(&dev_info, pfc_queue_conf);
+	if (ret != 0)
+		return ret;
+
+	ret = validate_tx_pause_config(&dev_info, pfc_queue_conf);
+	if (ret != 0)
+		return ret;
+
+
+	if (*dev->dev_ops->priority_flow_ctrl_queue_set)
+		return eth_err(port_id,
+			       (*dev->dev_ops->priority_flow_ctrl_queue_set)(
+				       dev, pfc_queue_conf));
+	return -ENOTSUP;
+}
+
 static int
 eth_check_reta_mask(struct rte_eth_rss_reta_entry64 *reta_conf,
 			uint16_t reta_size)
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index fa299c8ad7..d13b6df3b9 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -1395,6 +1395,28 @@ struct rte_eth_pfc_conf {
 	uint8_t priority;          /**< VLAN User Priority. */
 };
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to configure Ethernet priority flow control parameter for
+ * ethdev queues.
+ */
+struct rte_eth_pfc_queue_conf {
+	enum rte_eth_fc_mode mode;  /**< Link flow control mode */
+
+	struct {
+		uint16_t tx_qid;
+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
+	} rx_pause; /* Valid when (mode == FC_RX_PAUSE || mode == FC_FULL) */
+
+	struct {
+		uint16_t pause_time; /**< Pause quota in the Pause frame */
+		uint16_t rx_qid;
+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
+	} tx_pause; /* Valid when (mode == FC_TX_PAUSE || mode == FC_FULL) */
+};
+
 /**
  * Tunnel type for device-specific classifier configuration.
  * @see rte_eth_udp_tunnel
@@ -1841,8 +1863,30 @@ struct rte_eth_dev_info {
 	 * embedded managed interconnect/switch.
 	 */
 	struct rte_eth_switch_info switch_info;
-
-	uint64_t reserved_64s[2]; /**< Reserved for future fields */
+	/**
+	 * Maximum supported traffic class as per PFC (802.1Qbb) specification.
+	 *
+	 * Based on device support and use-case need, there are two different
+	 * ways to enable PFC. The first case is the port level PFC
+	 * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
+	 * API shall be used to configure the PFC, and PFC frames will be
+	 * generated using based on VLAN TC value.
+	 * The second case is the queue level PFC configuration, in this case,
+	 * Any packet field content can be used to steer the packet to the
+	 * specific queue using rte_flow or RSS and then use
+	 * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
+	 * on each queue. Based on congestion selected on the specific queue,
+	 * configured TC shall be used to generate PFC frames.
+	 *
+	 * When set to non zero value, application must use queue level
+	 * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
+	 * instead of port level PFC configuration via
+	 * rte_eth_dev_priority_flow_ctrl_set() API to realize
+	 * PFC configuration.
+	 */
+	uint8_t pfc_queue_tc_max;
+	uint8_t reserved_8s[7];
+	uint64_t reserved_64s[1]; /**< Reserved for future fields */
 	void *reserved_ptrs[2];   /**< Reserved for future fields */
 };
 
@@ -4109,6 +4153,9 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  * Configure the Ethernet priority flow control under DCB environment
  * for Ethernet device.
  *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority
+ * flow control usage models.
+ *
  * @param port_id
  * The port identifier of the Ethernet device.
  * @param pfc_conf
@@ -4119,10 +4166,40 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  *   - (-ENODEV)  if *port_id* invalid.
  *   - (-EINVAL)  if bad parameter
  *   - (-EIO)     if flow control setup failure or device is removed.
+ *
  */
 int rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
-				struct rte_eth_pfc_conf *pfc_conf);
+				       struct rte_eth_pfc_conf *pfc_conf);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Configure the Ethernet priority flow control for a given queue
+ * for Ethernet device.
+ *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority flow control
+ * usage models.
+ *
+ * @note When an ethdev port switches to PFC mode, the unconfigured
+ * queues shall be configured by the driver with default values such as
+ * lower priority value for TC etc.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param pfc_queue_conf
+ *   The pointer to the structure of the priority flow control parameters
+ *   for the queue.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENOTSUP) if hardware doesn't support priority flow control mode.
+ *   - (-ENODEV)  if *port_id* invalid.
+ *   - (-EINVAL)  if bad parameter
+ *   - (-EIO)     if flow control setup queue failure
+ */
+__rte_experimental
+int rte_eth_dev_priority_flow_ctrl_queue_set(uint16_t port_id,
+					     struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 /**
  * Add a MAC address to the set used for filtering incoming packets.
  *
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index c2fb0669a4..8f361ec15a 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -256,6 +256,9 @@ EXPERIMENTAL {
 	rte_flow_flex_item_create;
 	rte_flow_flex_item_release;
 	rte_flow_pick_transfer_proxy;
+
+	# added in 22.03
+	rte_eth_dev_priority_flow_ctrl_queue_set;
 };
 
 INTERNAL {
-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options
  2022-01-09 10:58 ` [PATCH v1 1/2] ethdev: support queue-based priority flow control skori
@ 2022-01-09 10:58   ` skori
  2022-01-09 11:16   ` [PATCH v1 1/2] ethdev: support queue-based priority flow control Sunil Kumar Kori
  2022-01-13 10:27   ` [dpdk-dev] [PATCH v2 " jerinj
  2 siblings, 0 replies; 12+ messages in thread
From: skori @ 2022-01-09 10:58 UTC (permalink / raw)
  To: Xiaoyun Li, Aman Singh; +Cc: dev, Sunil Kumar Kori

From: Sunil Kumar Kori <skori@marvell.com>

Patch adds command line options to configure queue based
priority flow control.

- Syntax command is given as below:

set pfc_queue_ctrl <port_id> rx <on|off> <tx_qid> <tx_tc> \
	tx <on|off> <rx_qid> <rx_tc> <pause_time>

- Example command to configure queue based priority flow control
  on rx and tx side for port 0, Rx queue 0, Tx queue 0 with pause
  time 2047

testpmd> set pfc_queue_ctrl 0 rx on 0 0 tx on 0 0 2047

Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
---
 app/test-pmd/cmdline.c                      | 122 ++++++++++++++++++++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  22 ++++
 2 files changed, 144 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 6e10afeedd..0240fcf9e7 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -544,6 +544,11 @@ static void cmd_help_long_parsed(void *parsed_result,
 			"    Set the priority flow control parameter on a"
 			" port.\n\n"
 
+			"set pfc_queue_ctrl (port_id) rx (on|off) (tx_qid)"
+			" (tx_tc) tx (on|off) (rx_qid) (rx_tc) (pause_time)\n"
+			"    Set the queue priority flow control parameter on a"
+			" given Rx and Tx queues of a port.\n\n"
+
 			"set stat_qmap (tx|rx) (port_id) (queue_id) (qmapping)\n"
 			"    Set statistics mapping (qmapping 0..15) for RX/TX"
 			" queue on port.\n"
@@ -7690,6 +7695,122 @@ cmdline_parse_inst_t cmd_priority_flow_control_set = {
 	},
 };
 
+struct cmd_queue_priority_flow_ctrl_set_result {
+	cmdline_fixed_string_t set;
+	cmdline_fixed_string_t pfc_queue_ctrl;
+	portid_t port_id;
+	cmdline_fixed_string_t rx;
+	cmdline_fixed_string_t rx_pfc_mode;
+	uint16_t tx_qid;
+	uint8_t  tx_tc;
+	cmdline_fixed_string_t tx;
+	cmdline_fixed_string_t tx_pfc_mode;
+	uint16_t rx_qid;
+	uint8_t  rx_tc;
+	uint16_t pause_time;
+};
+
+static void
+cmd_queue_priority_flow_ctrl_set_parsed(void *parsed_result,
+					__rte_unused struct cmdline *cl,
+					__rte_unused void *data)
+{
+	struct cmd_queue_priority_flow_ctrl_set_result *res = parsed_result;
+	struct rte_eth_pfc_queue_conf pfc_queue_conf;
+	int rx_fc_enable, tx_fc_enable;
+	int ret;
+
+	/*
+	 * Rx on/off, flow control is enabled/disabled on RX side. This can
+	 * indicate the RTE_ETH_FC_TX_PAUSE, Transmit pause frame at the Rx
+	 * side. Tx on/off, flow control is enabled/disabled on TX side. This
+	 * can indicate the RTE_ETH_FC_RX_PAUSE, Respond to the pause frame at
+	 * the Tx side.
+	 */
+	static enum rte_eth_fc_mode rx_tx_onoff_2_mode[2][2] = {
+		{RTE_ETH_FC_NONE, RTE_ETH_FC_TX_PAUSE},
+		{RTE_ETH_FC_RX_PAUSE, RTE_ETH_FC_FULL}
+	};
+
+	memset(&pfc_queue_conf, 0, sizeof(struct rte_eth_pfc_queue_conf));
+	rx_fc_enable = (!strncmp(res->rx_pfc_mode, "on", 2)) ? 1 : 0;
+	tx_fc_enable = (!strncmp(res->tx_pfc_mode, "on", 2)) ? 1 : 0;
+	pfc_queue_conf.mode = rx_tx_onoff_2_mode[rx_fc_enable][tx_fc_enable];
+	pfc_queue_conf.rx_pause.tc  = res->tx_tc;
+	pfc_queue_conf.rx_pause.tx_qid = res->tx_qid;
+	pfc_queue_conf.tx_pause.tc  = res->rx_tc;
+	pfc_queue_conf.tx_pause.rx_qid  = res->rx_qid;
+	pfc_queue_conf.tx_pause.pause_time = res->pause_time;
+
+	ret = rte_eth_dev_priority_flow_ctrl_queue_set(res->port_id,
+						       &pfc_queue_conf);
+	if (ret != 0) {
+		fprintf(stderr,
+			"bad queue priority flow control parameter, rc = %d\n",
+			ret);
+	}
+}
+
+cmdline_parse_token_string_t cmd_q_pfc_set_set =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				set, "set");
+cmdline_parse_token_string_t cmd_q_pfc_set_flow_ctrl =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				pfc_queue_ctrl, "pfc_queue_ctrl");
+cmdline_parse_token_num_t cmd_q_pfc_set_portid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				port_id, RTE_UINT16);
+cmdline_parse_token_string_t cmd_q_pfc_set_rx =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx, "rx");
+cmdline_parse_token_string_t cmd_q_pfc_set_rx_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_pfc_mode, "on#off");
+cmdline_parse_token_num_t cmd_q_pfc_set_tx_qid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_qid, RTE_UINT16);
+cmdline_parse_token_num_t cmd_q_pfc_set_tx_tc =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_tc, RTE_UINT8);
+cmdline_parse_token_string_t cmd_q_pfc_set_tx =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx, "tx");
+cmdline_parse_token_string_t cmd_q_pfc_set_tx_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_pfc_mode, "on#off");
+cmdline_parse_token_num_t cmd_q_pfc_set_rx_qid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_qid, RTE_UINT16);
+cmdline_parse_token_num_t cmd_q_pfc_set_rx_tc =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_tc, RTE_UINT8);
+cmdline_parse_token_num_t cmd_q_pfc_set_pause_time =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				pause_time, RTE_UINT16);
+
+cmdline_parse_inst_t cmd_queue_priority_flow_control_set = {
+	.f = cmd_queue_priority_flow_ctrl_set_parsed,
+	.data = NULL,
+	.help_str = "set pfc_queue_ctrl <port_id> rx <on|off> <tx_qid> <tx_tc> "
+		"tx <on|off> <rx_qid> <rx_tc> <pause_time>: "
+		"Configure the Ethernet queue priority flow control",
+	.tokens = {
+		(void *)&cmd_q_pfc_set_set,
+		(void *)&cmd_q_pfc_set_flow_ctrl,
+		(void *)&cmd_q_pfc_set_portid,
+		(void *)&cmd_q_pfc_set_rx,
+		(void *)&cmd_q_pfc_set_rx_mode,
+		(void *)&cmd_q_pfc_set_tx_qid,
+		(void *)&cmd_q_pfc_set_tx_tc,
+		(void *)&cmd_q_pfc_set_tx,
+		(void *)&cmd_q_pfc_set_tx_mode,
+		(void *)&cmd_q_pfc_set_rx_qid,
+		(void *)&cmd_q_pfc_set_rx_tc,
+		(void *)&cmd_q_pfc_set_pause_time,
+		NULL,
+	},
+};
+
 /* *** RESET CONFIGURATION *** */
 struct cmd_reset_result {
 	cmdline_fixed_string_t reset;
@@ -17765,6 +17886,7 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_set_autoneg,
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_show,
 	(cmdline_parse_inst_t *)&cmd_priority_flow_control_set,
+	(cmdline_parse_inst_t *)&cmd_queue_priority_flow_control_set,
 	(cmdline_parse_inst_t *)&cmd_config_dcb,
 	(cmdline_parse_inst_t *)&cmd_read_reg,
 	(cmdline_parse_inst_t *)&cmd_read_reg_bit_field,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 44228cd7d2..5ea2888adc 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -1561,6 +1561,28 @@ Where:
 
 * ``priority`` (0-7): VLAN User Priority.
 
+set pfc_queue_ctrl
+~~~~~~~~~~~~~~~~~~
+
+Set the priority flow control parameter on a given Rx and Tx queue of a port::
+
+   testpmd> set pfc_queue_ctrl <port_id> rx (on|off) <tx_qid> <tx_tc> \
+            tx (on|off) <rx_qid> <rx_tc> <pause_time>
+
+Where:
+
+* ``tx_qid`` (integer): Tx qid for which ``tx_tc`` will be applied and traffic
+  will be paused when PFC frame is received with ``tx_tc`` enabled.
+
+* ``tx_tc`` (0-15): TC for which traffic is to be paused for xmit.
+
+* ``rx_qid`` (integer): Rx qid for which threshold will be applied and PFC
+  frame will be generated with ``tx_tc`` when exceeds the threshold.
+
+* ``rx_tc`` (0-15): TC filled in PFC frame for which remote Tx is to be paused.
+
+* ``pause_time`` (integer): Pause quota filled in the PFC frame.
+
 set stat_qmap
 ~~~~~~~~~~~~~
 
-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* RE: [PATCH v1 1/2] ethdev: support queue-based priority flow control
  2022-01-09 10:58 ` [PATCH v1 1/2] ethdev: support queue-based priority flow control skori
  2022-01-09 10:58   ` [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options skori
@ 2022-01-09 11:16   ` Sunil Kumar Kori
  2022-01-13 10:27   ` [dpdk-dev] [PATCH v2 " jerinj
  2 siblings, 0 replies; 12+ messages in thread
From: Sunil Kumar Kori @ 2022-01-09 11:16 UTC (permalink / raw)
  To: Sunil Kumar Kori, Ray Kinsella, Thomas Monjalon, Ferruh Yigit,
	Andrew Rybchenko
  Cc: dev, Jerin Jacob Kollanukkaran

As per discussion with Jerin against the RFC http://patches.dpdk.org/project/dpdk/patch/20211204172458.1904300-1-jerinj@marvell.com/, following change set adds queue based PFC configuration. 
Also corresponding implementation for the API is available at http://patches.dpdk.org/project/dpdk/patch/20220109111130.751933-2-skori@marvell.com/ for Marvell platforms. 

Regards
Sunil Kumar Kori

>-----Original Message-----
>From: skori@marvell.com <skori@marvell.com>
>Sent: Sunday, January 9, 2022 4:29 PM
>To: Ray Kinsella <mdr@ashroe.eu>; Thomas Monjalon
><thomas@monjalon.net>; Ferruh Yigit <ferruh.yigit@intel.com>; Andrew
>Rybchenko <andrew.rybchenko@oktetlabs.ru>
>Cc: dev@dpdk.org; Sunil Kumar Kori <skori@marvell.com>; Jerin Jacob
>Kollanukkaran <jerinj@marvell.com>
>Subject: [PATCH v1 1/2] ethdev: support queue-based priority flow control
>
>From: Sunil Kumar Kori <skori@marvell.com>
>
>Based on device support and use-case need, there are two different ways to
>enable PFC. The first case is the port level PFC configuration, in this case,
>rte_eth_dev_priority_flow_ctrl_set() API shall be used to configure the PFC,
>and PFC frames will be generated using based on VLAN TC value.
>
>The second case is the queue level PFC configuration, in this case, Any packet
>field content can be used to steer the packet to the specific queue using
>rte_flow or RSS and then use
>rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping on each
>queue. Based on congestion selected on the specific queue, configured TC
>shall be used to generate PFC frames.
>
>Operation of these modes are mutually exclusive, when driver sets non zero
>value for rte_eth_dev_info::pfc_queue_tc_max,
>application must use queue level PFC configuration via
>rte_eth_dev_priority_flow_ctrl_queue_set() API instead of port level PFC
>configuration via rte_eth_dev_priority_flow_ctrl_set() API to realize PFC
>configuration.
>
>This patch enables the configuration for second case a.k.a queue based PFC
>also updates rte_eth_dev_priority_flow_ctrl_set()
>implmentaion to adheher to rte_eth_dev_info::pfc_queue_tc_max
>handling.
>
>Also updated libabigail.abignore to ignore the update to reserved fields in
>rte_eth_dev_info.
>
>Signed-off-by: Jerin Jacob <jerinj@marvell.com>
>Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
>---
>v1:
> - Added queue based PFC config API instead port based
>
> devtools/libabigail.abignore           |   5 ++
> doc/guides/nics/features.rst           |   5 +-
> doc/guides/rel_notes/release_22_03.rst |   3 +
> lib/ethdev/ethdev_driver.h             |   6 +-
> lib/ethdev/rte_ethdev.c                | 109 +++++++++++++++++++++++++
> lib/ethdev/rte_ethdev.h                |  83 ++++++++++++++++++-
> lib/ethdev/version.map                 |   3 +
> 7 files changed, 208 insertions(+), 6 deletions(-)
>
>diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore index
>4b676f317d..1d29e60c06 100644
>--- a/devtools/libabigail.abignore
>+++ b/devtools/libabigail.abignore
>@@ -11,3 +11,8 @@
> ; Ignore generated PMD information strings  [suppress_variable]
>         name_regexp = _pmd_info$
>+
>+; Ignore fields inserted in place of reserved fields of
>+rte_eth_dev_info [suppress_type]
>+       name = rte_eth_dev_info
>+       has_data_member_inserted_between = {offset_after(switch_info),
>+end}
>diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst index
>27be2d2576..277a784f4e 100644
>--- a/doc/guides/nics/features.rst
>+++ b/doc/guides/nics/features.rst
>@@ -379,9 +379,10 @@ Flow control
> Supports configuring link flow control.
>
> * **[implements] eth_dev_ops**: ``flow_ctrl_get``, ``flow_ctrl_set``,
>-  ``priority_flow_ctrl_set``.
>+  ``priority_flow_ctrl_set``, ``priority_flow_ctrl_queue_set``.
> * **[related]    API**: ``rte_eth_dev_flow_ctrl_get()``,
>``rte_eth_dev_flow_ctrl_set()``,
>-  ``rte_eth_dev_priority_flow_ctrl_set()``.
>+  ``rte_eth_dev_priority_flow_ctrl_set()``,
>``rte_eth_dev_priority_flow_ctrl_queue_set()``.
>+* **[provides]   rte_eth_dev_info**: ``pfc_queue_tc_max``.
>
>
> .. _nic_features_rate_limitation:
>diff --git a/doc/guides/rel_notes/release_22_03.rst
>b/doc/guides/rel_notes/release_22_03.rst
>index 6d99d1eaa9..b75c0356e6 100644
>--- a/doc/guides/rel_notes/release_22_03.rst
>+++ b/doc/guides/rel_notes/release_22_03.rst
>@@ -55,6 +55,9 @@ New Features
>      Also, make sure to start the actual text at the margin.
>      =======================================================
>
>+* **Added an API to enable queue based priority flow ctrl(PFC).**
>+
>+  A new API, ``rte_eth_dev_priority_flow_ctrl_queue_set()``, was added.
>
> Removed Items
> -------------
>diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h index
>d95605a355..e0bbfe89d7 100644
>--- a/lib/ethdev/ethdev_driver.h
>+++ b/lib/ethdev/ethdev_driver.h
>@@ -532,6 +532,9 @@ typedef int (*flow_ctrl_set_t)(struct rte_eth_dev *dev,
> /** @internal Setup priority flow control parameter on an Ethernet device. */
>typedef int (*priority_flow_ctrl_set_t)(struct rte_eth_dev *dev,
> 				struct rte_eth_pfc_conf *pfc_conf);
>+/** @internal Queue setup for priority flow control parameter on an
>+Ethernet device. */ typedef int (*priority_flow_ctrl_queue_set_t)(struct
>rte_eth_dev *dev,
>+				struct rte_eth_pfc_queue_conf
>*pfc_queue_conf);
>
> /** @internal Update RSS redirection table on an Ethernet device. */  typedef
>int (*reta_update_t)(struct rte_eth_dev *dev, @@ -1080,7 +1083,8 @@ struct
>eth_dev_ops {
> 	flow_ctrl_set_t            flow_ctrl_set; /**< Setup flow control */
> 	/** Setup priority flow control */
> 	priority_flow_ctrl_set_t   priority_flow_ctrl_set;
>-
>+	/** Priority flow control queue setup */
>+	priority_flow_ctrl_queue_set_t   priority_flow_ctrl_queue_set;
> 	/** Set Unicast Table Array */
> 	eth_uc_hash_table_set_t    uc_hash_table_set;
> 	/** Set Unicast hash bitmap */
>diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c index
>a1d475a292..6def057720 100644
>--- a/lib/ethdev/rte_ethdev.c
>+++ b/lib/ethdev/rte_ethdev.c
>@@ -3998,7 +3998,9 @@ int
> rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
> 				   struct rte_eth_pfc_conf *pfc_conf)  {
>+	struct rte_eth_dev_info dev_info;
> 	struct rte_eth_dev *dev;
>+	int ret;
>
> 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
> 	dev = &rte_eth_devices[port_id];
>@@ -4010,6 +4012,17 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t
>port_id,
> 		return -EINVAL;
> 	}
>
>+	ret = rte_eth_dev_info_get(port_id, &dev_info);
>+	if (ret != 0)
>+		return ret;
>+
>+	if (dev_info.pfc_queue_tc_max != 0) {
>+		RTE_ETHDEV_LOG(ERR,
>+			"Ethdev port %u driver does not support port level PFC
>config\n",
>+			port_id);
>+		return -ENOTSUP;
>+	}
>+
> 	if (pfc_conf->priority > (RTE_ETH_DCB_NUM_USER_PRIORITIES - 1)) {
> 		RTE_ETHDEV_LOG(ERR, "Invalid priority, only 0-7 allowed\n");
> 		return -EINVAL;
>@@ -4022,6 +4035,102 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t
>port_id,
> 	return -ENOTSUP;
> }
>
>+static inline int
>+validate_rx_pause_config(struct rte_eth_dev_info *dev_info,
>+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf) {
>+	if ((pfc_queue_conf->mode == RTE_ETH_FC_RX_PAUSE) ||
>+	    (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
>+		if (pfc_queue_conf->rx_pause.tx_qid >= dev_info-
>>nb_tx_queues) {
>+			RTE_ETHDEV_LOG(ERR, "Tx queue not in range for Rx
>pause"
>+				       " (requested: %d configured: %d)\n",
>+				       pfc_queue_conf->rx_pause.tx_qid,
>+				       dev_info->nb_tx_queues);
>+			return -EINVAL;
>+		}
>+
>+		if (pfc_queue_conf->rx_pause.tc >= dev_info-
>>pfc_queue_tc_max) {
>+			RTE_ETHDEV_LOG(ERR, "TC not in range for Rx pause"
>+				       " (requested: %d max: %d)\n",
>+				       pfc_queue_conf->rx_pause.tc,
>+				       dev_info->pfc_queue_tc_max);
>+			return -EINVAL;
>+		}
>+	}
>+
>+	return 0;
>+}
>+
>+static inline int
>+validate_tx_pause_config(struct rte_eth_dev_info *dev_info,
>+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf) {
>+	if ((pfc_queue_conf->mode == RTE_ETH_FC_TX_PAUSE) ||
>+	     (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
>+		if (pfc_queue_conf->tx_pause.rx_qid >= dev_info-
>>nb_rx_queues) {
>+			RTE_ETHDEV_LOG(ERR, "Rx queue not in range for Tx
>pause"
>+				       "(requested: %d configured: %d)\n",
>+				       pfc_queue_conf->tx_pause.rx_qid,
>+				       dev_info->nb_rx_queues);
>+			return -EINVAL;
>+		}
>+
>+		if (pfc_queue_conf->tx_pause.tc >= dev_info-
>>pfc_queue_tc_max) {
>+			RTE_ETHDEV_LOG(ERR, "TC not in range for Tx pause"
>+				       "(requested: %d max: %d)\n",
>+				       pfc_queue_conf->tx_pause.tc,
>+				       dev_info->pfc_queue_tc_max);
>+			return -EINVAL;
>+		}
>+	}
>+
>+	return 0;
>+}
>+
>+int
>+rte_eth_dev_priority_flow_ctrl_queue_set(
>+	uint16_t port_id, struct rte_eth_pfc_queue_conf *pfc_queue_conf) {
>+	struct rte_eth_dev_info dev_info;
>+	struct rte_eth_dev *dev;
>+	int ret;
>+
>+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
>+	dev = &rte_eth_devices[port_id];
>+
>+	if (pfc_queue_conf == NULL) {
>+		RTE_ETHDEV_LOG(ERR, "PFC parameters are NULL for port
>(%u)\n",
>+			       port_id);
>+		return -EINVAL;
>+	}
>+
>+	ret = rte_eth_dev_info_get(port_id, &dev_info);
>+	if (ret != 0)
>+		return ret;
>+
>+	if (dev_info.pfc_queue_tc_max == 0) {
>+		RTE_ETHDEV_LOG(ERR,
>+			"Ethdev port %u does not support PFC TC values\n",
>+			port_id);
>+		return -ENOTSUP;
>+	}
>+
>+	ret = validate_rx_pause_config(&dev_info, pfc_queue_conf);
>+	if (ret != 0)
>+		return ret;
>+
>+	ret = validate_tx_pause_config(&dev_info, pfc_queue_conf);
>+	if (ret != 0)
>+		return ret;
>+
>+
>+	if (*dev->dev_ops->priority_flow_ctrl_queue_set)
>+		return eth_err(port_id,
>+			       (*dev->dev_ops->priority_flow_ctrl_queue_set)(
>+				       dev, pfc_queue_conf));
>+	return -ENOTSUP;
>+}
>+
> static int
> eth_check_reta_mask(struct rte_eth_rss_reta_entry64 *reta_conf,
> 			uint16_t reta_size)
>diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h index
>fa299c8ad7..d13b6df3b9 100644
>--- a/lib/ethdev/rte_ethdev.h
>+++ b/lib/ethdev/rte_ethdev.h
>@@ -1395,6 +1395,28 @@ struct rte_eth_pfc_conf {
> 	uint8_t priority;          /**< VLAN User Priority. */
> };
>
>+/**
>+ * @warning
>+ * @b EXPERIMENTAL: this API may change, or be removed, without prior
>+notice
>+ *
>+ * A structure used to configure Ethernet priority flow control
>+parameter for
>+ * ethdev queues.
>+ */
>+struct rte_eth_pfc_queue_conf {
>+	enum rte_eth_fc_mode mode;  /**< Link flow control mode */
>+
>+	struct {
>+		uint16_t tx_qid;
>+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
>+	} rx_pause; /* Valid when (mode == FC_RX_PAUSE || mode ==
>FC_FULL) */
>+
>+	struct {
>+		uint16_t pause_time; /**< Pause quota in the Pause frame */
>+		uint16_t rx_qid;
>+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
>+	} tx_pause; /* Valid when (mode == FC_TX_PAUSE || mode ==
>FC_FULL) */
>+};
>+
> /**
>  * Tunnel type for device-specific classifier configuration.
>  * @see rte_eth_udp_tunnel
>@@ -1841,8 +1863,30 @@ struct rte_eth_dev_info {
> 	 * embedded managed interconnect/switch.
> 	 */
> 	struct rte_eth_switch_info switch_info;
>-
>-	uint64_t reserved_64s[2]; /**< Reserved for future fields */
>+	/**
>+	 * Maximum supported traffic class as per PFC (802.1Qbb)
>specification.
>+	 *
>+	 * Based on device support and use-case need, there are two different
>+	 * ways to enable PFC. The first case is the port level PFC
>+	 * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
>+	 * API shall be used to configure the PFC, and PFC frames will be
>+	 * generated using based on VLAN TC value.
>+	 * The second case is the queue level PFC configuration, in this case,
>+	 * Any packet field content can be used to steer the packet to the
>+	 * specific queue using rte_flow or RSS and then use
>+	 * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
>+	 * on each queue. Based on congestion selected on the specific queue,
>+	 * configured TC shall be used to generate PFC frames.
>+	 *
>+	 * When set to non zero value, application must use queue level
>+	 * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set()
>API
>+	 * instead of port level PFC configuration via
>+	 * rte_eth_dev_priority_flow_ctrl_set() API to realize
>+	 * PFC configuration.
>+	 */
>+	uint8_t pfc_queue_tc_max;
>+	uint8_t reserved_8s[7];
>+	uint64_t reserved_64s[1]; /**< Reserved for future fields */
> 	void *reserved_ptrs[2];   /**< Reserved for future fields */
> };
>
>@@ -4109,6 +4153,9 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
>  * Configure the Ethernet priority flow control under DCB environment
>  * for Ethernet device.
>  *
>+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority
>+ * flow control usage models.
>+ *
>  * @param port_id
>  * The port identifier of the Ethernet device.
>  * @param pfc_conf
>@@ -4119,10 +4166,40 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
>  *   - (-ENODEV)  if *port_id* invalid.
>  *   - (-EINVAL)  if bad parameter
>  *   - (-EIO)     if flow control setup failure or device is removed.
>+ *
>  */
> int rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
>-				struct rte_eth_pfc_conf *pfc_conf);
>+				       struct rte_eth_pfc_conf *pfc_conf);
>
>+/**
>+ * @warning
>+ * @b EXPERIMENTAL: this API may change without prior notice.
>+ *
>+ * Configure the Ethernet priority flow control for a given queue
>+ * for Ethernet device.
>+ *
>+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority flow control
>+ * usage models.
>+ *
>+ * @note When an ethdev port switches to PFC mode, the unconfigured
>+ * queues shall be configured by the driver with default values such as
>+ * lower priority value for TC etc.
>+ *
>+ * @param port_id
>+ *   The port identifier of the Ethernet device.
>+ * @param pfc_queue_conf
>+ *   The pointer to the structure of the priority flow control parameters
>+ *   for the queue.
>+ * @return
>+ *   - (0) if successful.
>+ *   - (-ENOTSUP) if hardware doesn't support priority flow control mode.
>+ *   - (-ENODEV)  if *port_id* invalid.
>+ *   - (-EINVAL)  if bad parameter
>+ *   - (-EIO)     if flow control setup queue failure
>+ */
>+__rte_experimental
>+int rte_eth_dev_priority_flow_ctrl_queue_set(uint16_t port_id,
>+					     struct rte_eth_pfc_queue_conf
>*pfc_queue_conf);
> /**
>  * Add a MAC address to the set used for filtering incoming packets.
>  *
>diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map index
>c2fb0669a4..8f361ec15a 100644
>--- a/lib/ethdev/version.map
>+++ b/lib/ethdev/version.map
>@@ -256,6 +256,9 @@ EXPERIMENTAL {
> 	rte_flow_flex_item_create;
> 	rte_flow_flex_item_release;
> 	rte_flow_pick_transfer_proxy;
>+
>+	# added in 22.03
>+	rte_eth_dev_priority_flow_ctrl_queue_set;
> };
>
> INTERNAL {
>--
>2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [dpdk-dev] [PATCH v2 1/2] ethdev: support queue-based priority flow control
  2022-01-09 10:58 ` [PATCH v1 1/2] ethdev: support queue-based priority flow control skori
  2022-01-09 10:58   ` [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options skori
  2022-01-09 11:16   ` [PATCH v1 1/2] ethdev: support queue-based priority flow control Sunil Kumar Kori
@ 2022-01-13 10:27   ` jerinj
  2022-01-13 10:27     ` [dpdk-dev] [PATCH v2 2/2] app/testpmd: add queue based pfc CLI options jerinj
  2 siblings, 1 reply; 12+ messages in thread
From: jerinj @ 2022-01-13 10:27 UTC (permalink / raw)
  To: dev, Ray Kinsella, Thomas Monjalon, Ferruh Yigit, Andrew Rybchenko
  Cc: ajit.khaparde, aboyer, beilei.xing, bruce.richardson, chas3,
	chenbo.xia, ciara.loftus, dsinghrawat, ed.czeck, evgenys, grive,
	g.singh, zhouguoyang, haiyue.wang, hkalra, heinrich.kuhn,
	hemant.agrawal, hyonkim, igorch, irusskikh, jgrajcia,
	jasvinder.singh, jianwang, jiawenwu, jingjing.wu, johndale,
	john.miller, linville, keith.wiles, kirankumark, oulijun, lironh,
	longli, mw, spinler, matan, matt.peters, maxime.coquelin, mk,
	humin29, pnalla, ndabilpuram, qiming.yang, qi.z.zhang, radhac,
	rahul.lakkireddy, rmody, rosen.xu, sachin.saxena, skoteshwar,
	shshaikh, shaibran, shepard.siegel, asomalap, somnath.kotur,
	sthemmin, steven.webster, skori, mtetsuyah, vburru, viacheslavo,
	xiao.w.wang, cloud.wangxiaoyun, yisen.zhuang, yongwang,
	xuanziyang2, Jerin Jacob

From: Jerin Jacob <jerinj@marvell.com>

Based on device support and use-case need, there are two different ways
to enable PFC. The first case is the port level PFC configuration, in
this case, rte_eth_dev_priority_flow_ctrl_set() API shall be used to
configure the PFC, and PFC frames will be generated using based on VLAN
TC value.

The second case is the queue level PFC configuration, in this
case, Any packet field content can be used to steer the packet to the
specific queue using rte_flow or RSS and then use
rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping on each
queue. Based on congestion selected on the specific queue, configured TC
shall be used to generate PFC frames.

Operation of these modes are mutually exclusive, when driver sets
non zero value for rte_eth_dev_info::pfc_queue_tc_max,
application must use queue level PFC configuration via
rte_eth_dev_priority_flow_ctrl_queue_set() API instead of port level
PFC configuration via rte_eth_dev_priority_flow_ctrl_set() API to
realize PFC configuration.

This patch enables the configuration for second case a.k.a queue
based PFC also updates rte_eth_dev_priority_flow_ctrl_set()
implmentaion to adheher to rte_eth_dev_info::pfc_queue_tc_max
handling.

Also updated libabigail.abignore to ignore the update
to reserved fields in rte_eth_dev_info.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
---

A driver implemtion based on this API is at
https://patches.dpdk.org/project/dpdk/patch/20220111081831.881374-1-skori@marvell.com/

RFC..v1
 - Added queue based PFC config API instead port based

v1..v2
- Updated libabigail.ignore as
  has_data_member_inserted_between = {offset_of(reserved_64s), end}
- Updated doxygen comments of rte_eth_pfc_queue_conf


 devtools/libabigail.abignore           |   5 ++
 doc/guides/nics/features.rst           |   5 +-
 doc/guides/rel_notes/release_22_03.rst |   3 +
 lib/ethdev/ethdev_driver.h             |   6 +-
 lib/ethdev/rte_ethdev.c                | 109 +++++++++++++++++++++++++
 lib/ethdev/rte_ethdev.h                |  83 ++++++++++++++++++-
 lib/ethdev/version.map                 |   3 +
 7 files changed, 208 insertions(+), 6 deletions(-)

diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore
index 4b676f317d..3bdecaaef0 100644
--- a/devtools/libabigail.abignore
+++ b/devtools/libabigail.abignore
@@ -11,3 +11,8 @@
 ; Ignore generated PMD information strings
 [suppress_variable]
         name_regexp = _pmd_info$
+
+;Ignore fields inserted in place of reserved fields of rte_eth_dev_info
+[suppress_type]
+       name = rte_eth_dev_info
+       has_data_member_inserted_between = {offset_of(reserved_64s), end}
diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 27be2d2576..277a784f4e 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -379,9 +379,10 @@ Flow control
 Supports configuring link flow control.
 
 * **[implements] eth_dev_ops**: ``flow_ctrl_get``, ``flow_ctrl_set``,
-  ``priority_flow_ctrl_set``.
+  ``priority_flow_ctrl_set``, ``priority_flow_ctrl_queue_set``.
 * **[related]    API**: ``rte_eth_dev_flow_ctrl_get()``, ``rte_eth_dev_flow_ctrl_set()``,
-  ``rte_eth_dev_priority_flow_ctrl_set()``.
+  ``rte_eth_dev_priority_flow_ctrl_set()``, ``rte_eth_dev_priority_flow_ctrl_queue_set()``.
+* **[provides]   rte_eth_dev_info**: ``pfc_queue_tc_max``.
 
 
 .. _nic_features_rate_limitation:
diff --git a/doc/guides/rel_notes/release_22_03.rst b/doc/guides/rel_notes/release_22_03.rst
index 6d99d1eaa9..b75c0356e6 100644
--- a/doc/guides/rel_notes/release_22_03.rst
+++ b/doc/guides/rel_notes/release_22_03.rst
@@ -55,6 +55,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added an API to enable queue based priority flow ctrl(PFC).**
+
+  A new API, ``rte_eth_dev_priority_flow_ctrl_queue_set()``, was added.
 
 Removed Items
 -------------
diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index d95605a355..e0bbfe89d7 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -532,6 +532,9 @@ typedef int (*flow_ctrl_set_t)(struct rte_eth_dev *dev,
 /** @internal Setup priority flow control parameter on an Ethernet device. */
 typedef int (*priority_flow_ctrl_set_t)(struct rte_eth_dev *dev,
 				struct rte_eth_pfc_conf *pfc_conf);
+/** @internal Queue setup for priority flow control parameter on an Ethernet device. */
+typedef int (*priority_flow_ctrl_queue_set_t)(struct rte_eth_dev *dev,
+				struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 
 /** @internal Update RSS redirection table on an Ethernet device. */
 typedef int (*reta_update_t)(struct rte_eth_dev *dev,
@@ -1080,7 +1083,8 @@ struct eth_dev_ops {
 	flow_ctrl_set_t            flow_ctrl_set; /**< Setup flow control */
 	/** Setup priority flow control */
 	priority_flow_ctrl_set_t   priority_flow_ctrl_set;
-
+	/** Priority flow control queue setup */
+	priority_flow_ctrl_queue_set_t   priority_flow_ctrl_queue_set;
 	/** Set Unicast Table Array */
 	eth_uc_hash_table_set_t    uc_hash_table_set;
 	/** Set Unicast hash bitmap */
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index a1d475a292..6def057720 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -3998,7 +3998,9 @@ int
 rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 				   struct rte_eth_pfc_conf *pfc_conf)
 {
+	struct rte_eth_dev_info dev_info;
 	struct rte_eth_dev *dev;
+	int ret;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
@@ -4010,6 +4012,17 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 		return -EINVAL;
 	}
 
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max != 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u driver does not support port level PFC config\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
 	if (pfc_conf->priority > (RTE_ETH_DCB_NUM_USER_PRIORITIES - 1)) {
 		RTE_ETHDEV_LOG(ERR, "Invalid priority, only 0-7 allowed\n");
 		return -EINVAL;
@@ -4022,6 +4035,102 @@ rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
 	return -ENOTSUP;
 }
 
+static inline int
+validate_rx_pause_config(struct rte_eth_dev_info *dev_info,
+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	if ((pfc_queue_conf->mode == RTE_ETH_FC_RX_PAUSE) ||
+	    (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
+		if (pfc_queue_conf->rx_pause.tx_qid >= dev_info->nb_tx_queues) {
+			RTE_ETHDEV_LOG(ERR, "Tx queue not in range for Rx pause"
+				       " (requested: %d configured: %d)\n",
+				       pfc_queue_conf->rx_pause.tx_qid,
+				       dev_info->nb_tx_queues);
+			return -EINVAL;
+		}
+
+		if (pfc_queue_conf->rx_pause.tc >= dev_info->pfc_queue_tc_max) {
+			RTE_ETHDEV_LOG(ERR, "TC not in range for Rx pause"
+				       " (requested: %d max: %d)\n",
+				       pfc_queue_conf->rx_pause.tc,
+				       dev_info->pfc_queue_tc_max);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static inline int
+validate_tx_pause_config(struct rte_eth_dev_info *dev_info,
+			 struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	if ((pfc_queue_conf->mode == RTE_ETH_FC_TX_PAUSE) ||
+	     (pfc_queue_conf->mode == RTE_ETH_FC_FULL)) {
+		if (pfc_queue_conf->tx_pause.rx_qid >= dev_info->nb_rx_queues) {
+			RTE_ETHDEV_LOG(ERR, "Rx queue not in range for Tx pause"
+				       "(requested: %d configured: %d)\n",
+				       pfc_queue_conf->tx_pause.rx_qid,
+				       dev_info->nb_rx_queues);
+			return -EINVAL;
+		}
+
+		if (pfc_queue_conf->tx_pause.tc >= dev_info->pfc_queue_tc_max) {
+			RTE_ETHDEV_LOG(ERR, "TC not in range for Tx pause"
+				       "(requested: %d max: %d)\n",
+				       pfc_queue_conf->tx_pause.tc,
+				       dev_info->pfc_queue_tc_max);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+int
+rte_eth_dev_priority_flow_ctrl_queue_set(
+	uint16_t port_id, struct rte_eth_pfc_queue_conf *pfc_queue_conf)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_dev *dev;
+	int ret;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+	dev = &rte_eth_devices[port_id];
+
+	if (pfc_queue_conf == NULL) {
+		RTE_ETHDEV_LOG(ERR, "PFC parameters are NULL for port (%u)\n",
+			       port_id);
+		return -EINVAL;
+	}
+
+	ret = rte_eth_dev_info_get(port_id, &dev_info);
+	if (ret != 0)
+		return ret;
+
+	if (dev_info.pfc_queue_tc_max == 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port %u does not support PFC TC values\n",
+			port_id);
+		return -ENOTSUP;
+	}
+
+	ret = validate_rx_pause_config(&dev_info, pfc_queue_conf);
+	if (ret != 0)
+		return ret;
+
+	ret = validate_tx_pause_config(&dev_info, pfc_queue_conf);
+	if (ret != 0)
+		return ret;
+
+
+	if (*dev->dev_ops->priority_flow_ctrl_queue_set)
+		return eth_err(port_id,
+			       (*dev->dev_ops->priority_flow_ctrl_queue_set)(
+				       dev, pfc_queue_conf));
+	return -ENOTSUP;
+}
+
 static int
 eth_check_reta_mask(struct rte_eth_rss_reta_entry64 *reta_conf,
 			uint16_t reta_size)
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index fa299c8ad7..33e43f6e1d 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -1395,6 +1395,28 @@ struct rte_eth_pfc_conf {
 	uint8_t priority;          /**< VLAN User Priority. */
 };
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to configure Ethernet priority flow control parameter for
+ * ethdev queues.
+ */
+struct rte_eth_pfc_queue_conf {
+	enum rte_eth_fc_mode mode;  /**< Link flow control mode */
+
+	struct {
+		uint16_t tx_qid; /**< Tx queue ID */
+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
+	} rx_pause; /* Valid when (mode == FC_RX_PAUSE || mode == FC_FULL) */
+
+	struct {
+		uint16_t pause_time; /**< Pause quota in the Pause frame */
+		uint16_t rx_qid; /**< Rx queue ID */
+		uint8_t tc; /**< Traffic class as per PFC (802.1Qbb) spec */
+	} tx_pause; /* Valid when (mode == FC_TX_PAUSE || mode == FC_FULL) */
+};
+
 /**
  * Tunnel type for device-specific classifier configuration.
  * @see rte_eth_udp_tunnel
@@ -1841,8 +1863,30 @@ struct rte_eth_dev_info {
 	 * embedded managed interconnect/switch.
 	 */
 	struct rte_eth_switch_info switch_info;
-
-	uint64_t reserved_64s[2]; /**< Reserved for future fields */
+	/**
+	 * Maximum supported traffic class as per PFC (802.1Qbb) specification.
+	 *
+	 * Based on device support and use-case need, there are two different
+	 * ways to enable PFC. The first case is the port level PFC
+	 * configuration, in this case, rte_eth_dev_priority_flow_ctrl_set()
+	 * API shall be used to configure the PFC, and PFC frames will be
+	 * generated using based on VLAN TC value.
+	 * The second case is the queue level PFC configuration, in this case,
+	 * Any packet field content can be used to steer the packet to the
+	 * specific queue using rte_flow or RSS and then use
+	 * rte_eth_dev_priority_flow_ctrl_queue_set() to set the TC mapping
+	 * on each queue. Based on congestion selected on the specific queue,
+	 * configured TC shall be used to generate PFC frames.
+	 *
+	 * When set to non zero value, application must use queue level
+	 * PFC configuration via rte_eth_dev_priority_flow_ctrl_queue_set() API
+	 * instead of port level PFC configuration via
+	 * rte_eth_dev_priority_flow_ctrl_set() API to realize
+	 * PFC configuration.
+	 */
+	uint8_t pfc_queue_tc_max;
+	uint8_t reserved_8s[7];
+	uint64_t reserved_64s[1]; /**< Reserved for future fields */
 	void *reserved_ptrs[2];   /**< Reserved for future fields */
 };
 
@@ -4109,6 +4153,9 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  * Configure the Ethernet priority flow control under DCB environment
  * for Ethernet device.
  *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority
+ * flow control usage models.
+ *
  * @param port_id
  * The port identifier of the Ethernet device.
  * @param pfc_conf
@@ -4119,10 +4166,40 @@ int rte_eth_dev_flow_ctrl_set(uint16_t port_id,
  *   - (-ENODEV)  if *port_id* invalid.
  *   - (-EINVAL)  if bad parameter
  *   - (-EIO)     if flow control setup failure or device is removed.
+ *
  */
 int rte_eth_dev_priority_flow_ctrl_set(uint16_t port_id,
-				struct rte_eth_pfc_conf *pfc_conf);
+				       struct rte_eth_pfc_conf *pfc_conf);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Configure the Ethernet priority flow control for a given queue
+ * for Ethernet device.
+ *
+ * @see struct rte_eth_dev_info::pfc_queue_tc_max priority flow control
+ * usage models.
+ *
+ * @note When an ethdev port switches to PFC mode, the unconfigured
+ * queues shall be configured by the driver with default values such as
+ * lower priority value for TC etc.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param pfc_queue_conf
+ *   The pointer to the structure of the priority flow control parameters
+ *   for the queue.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENOTSUP) if hardware doesn't support priority flow control mode.
+ *   - (-ENODEV)  if *port_id* invalid.
+ *   - (-EINVAL)  if bad parameter
+ *   - (-EIO)     if flow control setup queue failure
+ */
+__rte_experimental
+int rte_eth_dev_priority_flow_ctrl_queue_set(uint16_t port_id,
+					     struct rte_eth_pfc_queue_conf *pfc_queue_conf);
 /**
  * Add a MAC address to the set used for filtering incoming packets.
  *
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index c2fb0669a4..8f361ec15a 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -256,6 +256,9 @@ EXPERIMENTAL {
 	rte_flow_flex_item_create;
 	rte_flow_flex_item_release;
 	rte_flow_pick_transfer_proxy;
+
+	# added in 22.03
+	rte_eth_dev_priority_flow_ctrl_queue_set;
 };
 
 INTERNAL {
-- 
2.34.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [dpdk-dev] [PATCH v2 2/2] app/testpmd: add queue based pfc CLI options
  2022-01-13 10:27   ` [dpdk-dev] [PATCH v2 " jerinj
@ 2022-01-13 10:27     ` jerinj
  0 siblings, 0 replies; 12+ messages in thread
From: jerinj @ 2022-01-13 10:27 UTC (permalink / raw)
  To: dev, Xiaoyun Li, Aman Singh, Yuying Zhang
  Cc: thomas, ferruh.yigit, ajit.khaparde, aboyer, andrew.rybchenko,
	beilei.xing, bruce.richardson, chas3, chenbo.xia, ciara.loftus,
	dsinghrawat, ed.czeck, evgenys, grive, g.singh, zhouguoyang,
	haiyue.wang, hkalra, heinrich.kuhn, hemant.agrawal, hyonkim,
	igorch, irusskikh, jgrajcia, jasvinder.singh, jianwang, jiawenwu,
	jingjing.wu, johndale, john.miller, linville, keith.wiles,
	kirankumark, oulijun, lironh, longli, mw, spinler, matan,
	matt.peters, maxime.coquelin, mk, humin29, pnalla, ndabilpuram,
	qiming.yang, qi.z.zhang, radhac, rahul.lakkireddy, rmody,
	rosen.xu, sachin.saxena, skoteshwar, shshaikh, shaibran,
	shepard.siegel, asomalap, somnath.kotur, sthemmin,
	steven.webster, skori, mtetsuyah, vburru, viacheslavo,
	xiao.w.wang, cloud.wangxiaoyun, yisen.zhuang, yongwang,
	xuanziyang2

From: Sunil Kumar Kori <skori@marvell.com>

Patch adds command line options to configure queue based
priority flow control.

- Syntax command is given as below:

set pfc_queue_ctrl <port_id> rx <on|off> <tx_qid> <tx_tc> \
	tx <on|off> <rx_qid> <rx_tc> <pause_time>

- Example command to configure queue based priority flow control
  on rx and tx side for port 0, Rx queue 0, Tx queue 0 with pause
  time 2047

testpmd> set pfc_queue_ctrl 0 rx on 0 0 tx on 0 0 2047

Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
---
 app/test-pmd/cmdline.c                      | 122 ++++++++++++++++++++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  22 ++++
 2 files changed, 144 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index e626b1c7d9..19dbcea4f1 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -544,6 +544,11 @@ static void cmd_help_long_parsed(void *parsed_result,
 			"    Set the priority flow control parameter on a"
 			" port.\n\n"
 
+			"set pfc_queue_ctrl (port_id) rx (on|off) (tx_qid)"
+			" (tx_tc) tx (on|off) (rx_qid) (rx_tc) (pause_time)\n"
+			"    Set the queue priority flow control parameter on a"
+			" given Rx and Tx queues of a port.\n\n"
+
 			"set stat_qmap (tx|rx) (port_id) (queue_id) (qmapping)\n"
 			"    Set statistics mapping (qmapping 0..15) for RX/TX"
 			" queue on port.\n"
@@ -7690,6 +7695,122 @@ cmdline_parse_inst_t cmd_priority_flow_control_set = {
 	},
 };
 
+struct cmd_queue_priority_flow_ctrl_set_result {
+	cmdline_fixed_string_t set;
+	cmdline_fixed_string_t pfc_queue_ctrl;
+	portid_t port_id;
+	cmdline_fixed_string_t rx;
+	cmdline_fixed_string_t rx_pfc_mode;
+	uint16_t tx_qid;
+	uint8_t  tx_tc;
+	cmdline_fixed_string_t tx;
+	cmdline_fixed_string_t tx_pfc_mode;
+	uint16_t rx_qid;
+	uint8_t  rx_tc;
+	uint16_t pause_time;
+};
+
+static void
+cmd_queue_priority_flow_ctrl_set_parsed(void *parsed_result,
+					__rte_unused struct cmdline *cl,
+					__rte_unused void *data)
+{
+	struct cmd_queue_priority_flow_ctrl_set_result *res = parsed_result;
+	struct rte_eth_pfc_queue_conf pfc_queue_conf;
+	int rx_fc_enable, tx_fc_enable;
+	int ret;
+
+	/*
+	 * Rx on/off, flow control is enabled/disabled on RX side. This can
+	 * indicate the RTE_ETH_FC_TX_PAUSE, Transmit pause frame at the Rx
+	 * side. Tx on/off, flow control is enabled/disabled on TX side. This
+	 * can indicate the RTE_ETH_FC_RX_PAUSE, Respond to the pause frame at
+	 * the Tx side.
+	 */
+	static enum rte_eth_fc_mode rx_tx_onoff_2_mode[2][2] = {
+		{RTE_ETH_FC_NONE, RTE_ETH_FC_TX_PAUSE},
+		{RTE_ETH_FC_RX_PAUSE, RTE_ETH_FC_FULL}
+	};
+
+	memset(&pfc_queue_conf, 0, sizeof(struct rte_eth_pfc_queue_conf));
+	rx_fc_enable = (!strncmp(res->rx_pfc_mode, "on", 2)) ? 1 : 0;
+	tx_fc_enable = (!strncmp(res->tx_pfc_mode, "on", 2)) ? 1 : 0;
+	pfc_queue_conf.mode = rx_tx_onoff_2_mode[rx_fc_enable][tx_fc_enable];
+	pfc_queue_conf.rx_pause.tc  = res->tx_tc;
+	pfc_queue_conf.rx_pause.tx_qid = res->tx_qid;
+	pfc_queue_conf.tx_pause.tc  = res->rx_tc;
+	pfc_queue_conf.tx_pause.rx_qid  = res->rx_qid;
+	pfc_queue_conf.tx_pause.pause_time = res->pause_time;
+
+	ret = rte_eth_dev_priority_flow_ctrl_queue_set(res->port_id,
+						       &pfc_queue_conf);
+	if (ret != 0) {
+		fprintf(stderr,
+			"bad queue priority flow control parameter, rc = %d\n",
+			ret);
+	}
+}
+
+cmdline_parse_token_string_t cmd_q_pfc_set_set =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				set, "set");
+cmdline_parse_token_string_t cmd_q_pfc_set_flow_ctrl =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				pfc_queue_ctrl, "pfc_queue_ctrl");
+cmdline_parse_token_num_t cmd_q_pfc_set_portid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				port_id, RTE_UINT16);
+cmdline_parse_token_string_t cmd_q_pfc_set_rx =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx, "rx");
+cmdline_parse_token_string_t cmd_q_pfc_set_rx_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_pfc_mode, "on#off");
+cmdline_parse_token_num_t cmd_q_pfc_set_tx_qid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_qid, RTE_UINT16);
+cmdline_parse_token_num_t cmd_q_pfc_set_tx_tc =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_tc, RTE_UINT8);
+cmdline_parse_token_string_t cmd_q_pfc_set_tx =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx, "tx");
+cmdline_parse_token_string_t cmd_q_pfc_set_tx_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				tx_pfc_mode, "on#off");
+cmdline_parse_token_num_t cmd_q_pfc_set_rx_qid =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_qid, RTE_UINT16);
+cmdline_parse_token_num_t cmd_q_pfc_set_rx_tc =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				rx_tc, RTE_UINT8);
+cmdline_parse_token_num_t cmd_q_pfc_set_pause_time =
+	TOKEN_NUM_INITIALIZER(struct cmd_queue_priority_flow_ctrl_set_result,
+				pause_time, RTE_UINT16);
+
+cmdline_parse_inst_t cmd_queue_priority_flow_control_set = {
+	.f = cmd_queue_priority_flow_ctrl_set_parsed,
+	.data = NULL,
+	.help_str = "set pfc_queue_ctrl <port_id> rx <on|off> <tx_qid> <tx_tc> "
+		"tx <on|off> <rx_qid> <rx_tc> <pause_time>: "
+		"Configure the Ethernet queue priority flow control",
+	.tokens = {
+		(void *)&cmd_q_pfc_set_set,
+		(void *)&cmd_q_pfc_set_flow_ctrl,
+		(void *)&cmd_q_pfc_set_portid,
+		(void *)&cmd_q_pfc_set_rx,
+		(void *)&cmd_q_pfc_set_rx_mode,
+		(void *)&cmd_q_pfc_set_tx_qid,
+		(void *)&cmd_q_pfc_set_tx_tc,
+		(void *)&cmd_q_pfc_set_tx,
+		(void *)&cmd_q_pfc_set_tx_mode,
+		(void *)&cmd_q_pfc_set_rx_qid,
+		(void *)&cmd_q_pfc_set_rx_tc,
+		(void *)&cmd_q_pfc_set_pause_time,
+		NULL,
+	},
+};
+
 /* *** RESET CONFIGURATION *** */
 struct cmd_reset_result {
 	cmdline_fixed_string_t reset;
@@ -17765,6 +17886,7 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_set_autoneg,
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_show,
 	(cmdline_parse_inst_t *)&cmd_priority_flow_control_set,
+	(cmdline_parse_inst_t *)&cmd_queue_priority_flow_control_set,
 	(cmdline_parse_inst_t *)&cmd_config_dcb,
 	(cmdline_parse_inst_t *)&cmd_read_reg,
 	(cmdline_parse_inst_t *)&cmd_read_reg_bit_field,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 94792d88cc..82333d518e 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -1561,6 +1561,28 @@ Where:
 
 * ``priority`` (0-7): VLAN User Priority.
 
+set pfc_queue_ctrl
+~~~~~~~~~~~~~~~~~~
+
+Set the priority flow control parameter on a given Rx and Tx queue of a port::
+
+   testpmd> set pfc_queue_ctrl <port_id> rx (on|off) <tx_qid> <tx_tc> \
+            tx (on|off) <rx_qid> <rx_tc> <pause_time>
+
+Where:
+
+* ``tx_qid`` (integer): Tx qid for which ``tx_tc`` will be applied and traffic
+  will be paused when PFC frame is received with ``tx_tc`` enabled.
+
+* ``tx_tc`` (0-15): TC for which traffic is to be paused for xmit.
+
+* ``rx_qid`` (integer): Rx qid for which threshold will be applied and PFC
+  frame will be generated with ``tx_tc`` when exceeds the threshold.
+
+* ``rx_tc`` (0-15): TC filled in PFC frame for which remote Tx is to be paused.
+
+* ``pause_time`` (integer): Pause quota filled in the PFC frame.
+
 set stat_qmap
 ~~~~~~~~~~~~~
 
-- 
2.34.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2022-01-13 10:28 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-12-04 17:24 [dpdk-dev] [PATCH] ethdev: support queue-based priority flow control jerinj
2021-12-04 17:38 ` Stephen Hemminger
2021-12-05  7:03   ` Jerin Jacob
2021-12-05 18:00     ` Stephen Hemminger
2021-12-06  9:57       ` Jerin Jacob
2022-01-09 10:54 ` [PATCH v1 1/2] " skori
2022-01-09 10:54   ` [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options skori
2022-01-09 10:58 ` [PATCH v1 1/2] ethdev: support queue-based priority flow control skori
2022-01-09 10:58   ` [PATCH v1 2/2] app/testpmd: add queue based pfc CLI options skori
2022-01-09 11:16   ` [PATCH v1 1/2] ethdev: support queue-based priority flow control Sunil Kumar Kori
2022-01-13 10:27   ` [dpdk-dev] [PATCH v2 " jerinj
2022-01-13 10:27     ` [dpdk-dev] [PATCH v2 2/2] app/testpmd: add queue based pfc CLI options jerinj

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ http://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git