[dpdk-dev] [PATCH] drivers/net/nfb: add timestamp support

[dpdk-dev] [PATCH] drivers/net/nfb: add timestamp support

[Rastislav Cernay]

From: Rastislav Cernay <cernay@netcope.com>

This patch adds timestamping support to nfb driver.

Signed-off-by: Rastislav Cernay <cernay@netcope.com>
---
 config/common_base          |  1 +
 doc/guides/nics/nfb.rst     | 22 ++++++++++++++++++++++
 drivers/net/nfb/Makefile    |  5 +++++
 drivers/net/nfb/meson.build |  4 ++++
 drivers/net/nfb/nfb_rx.h    | 13 +++++++++++++
 5 files changed, 45 insertions(+)

diff --git a/config/common_base b/config/common_base
index 6f19ad5..f533136 100644
--- a/config/common_base
+++ b/config/common_base
@@ -383,6 +383,7 @@ CONFIG_RTE_LIBRTE_PMD_SZEDATA2=n
 # Compile software PMD backed by NFB device
 #
 CONFIG_RTE_LIBRTE_NFB_PMD=n
+CONFIG_RTE_LIBRTE_NFB_HW_TIMESTAMP=n
 
 #
 # Compile burst-oriented Cavium Thunderx NICVF PMD driver
diff --git a/doc/guides/nics/nfb.rst b/doc/guides/nics/nfb.rst
index 8df76c0..a172f9a 100644
--- a/doc/guides/nics/nfb.rst
+++ b/doc/guides/nics/nfb.rst
@@ -69,6 +69,10 @@ These configuration options can be modified before compilation in the
 
    Value **y** enables compilation of nfb PMD.
 
+*  ``CONFIG_RTE_LIBRTE_NFB_HW_TIMESTAMP`` default value: **n**
+
+   Value **y** enables HW packet timestamping.
+
 Using the NFB PMD
 ----------------------
 
@@ -142,3 +146,21 @@ Example output:
      TX threshold registers: pthresh=0 hthresh=0 wthresh=0
      TX RS bit threshold=0 - TXQ flags=0x0
    testpmd>
+
+Timestamp
+----------------
+
+Timestamping needs to be enabled during compile time, as there is no way
+to check whether a timestamping unit is runnig during run time.
+
+While enabled, a validity flag of a timestamp is set and a timestamp data is inserted into a rte_mbuf struct.
+The timestamping unit still needs to be enabled separately according to the documentation of NFB products.
+
+Timestamp is in uint64_t field where upper 32 bits represents nanoseconds and lower 32 bits seconds.
+
+Nanoseconds contains the nanosecond part of the timestamp representing the
+time of frame receipt on physical network interface. It is the number of nanoseconds elapsed
+since the beginning of the second in Timestamp (seconds) field.
+
+Seconds contains the second part of the timestamp representing the time of frame
+receipt on physical network interface.
\ No newline at end of file
diff --git a/drivers/net/nfb/Makefile b/drivers/net/nfb/Makefile
index a84b423..a9c4607 100644
--- a/drivers/net/nfb/Makefile
+++ b/drivers/net/nfb/Makefile
@@ -16,6 +16,11 @@ INCLUDES :=-I$(SRCDIR)
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 CFLAGS += $(shell command -v pkg-config > /dev/null 2>&1 && pkg-config --cflags netcope-common)
+
+ifeq ($(CONFIG_RTE_LIBRTE_NFB_HW_TIMESTAMP),y)
+    CFLAGS += -DNFB_HW_TIMESTAMP
+endif
+
 LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool
 LDLIBS += -lrte_ethdev -lrte_net
 LDLIBS += -lrte_bus_pci
diff --git a/drivers/net/nfb/meson.build b/drivers/net/nfb/meson.build
index 457955d..c39007a 100644
--- a/drivers/net/nfb/meson.build
+++ b/drivers/net/nfb/meson.build
@@ -13,3 +13,7 @@ ext_deps += dep
 ext_deps += nc
 
 sources = files('nfb_rx.c', 'nfb_tx.c', 'nfb_stats.c', 'nfb_ethdev.c', 'nfb_rxmode.c')
+
+if dpdk_conf.has('RTE_LIBRTE_NFB_HW_TIMESTAMP')
+    cflags += [ '-DNFB_HW_TIMESTAMP' ]
+endif
diff --git a/drivers/net/nfb/nfb_rx.h b/drivers/net/nfb/nfb_rx.h
index 88a0307..1178917 100644
--- a/drivers/net/nfb/nfb_rx.h
+++ b/drivers/net/nfb/nfb_rx.h
@@ -181,6 +181,19 @@ struct ndp_rx_queue {
 
 			mbuf->pkt_len = packet_size;
 			mbuf->port = ndp->in_port;
+			mbuf->ol_flags = 0;
+
+#ifdef NFB_HW_TIMESTAMP
+			/* nanoseconds */
+			mbuf->timestamp = rte_le_to_cpu_32(*((uint32_t *)
+				(packets[i].header + 4)));
+			mbuf->timestamp <<= 32;
+			/* seconds */
+			mbuf->timestamp |= rte_le_to_cpu_32(*((uint32_t *)
+				(packets[i].header + 8)));
+			mbuf->ol_flags |= PKT_RX_TIMESTAMP;
+#endif /* NFB_HW_TIMESTAMP */
+
 			bufs[num_rx++] = mbuf;
 			num_bytes += packet_size;
 		} else {
-- 
1.8.3.1

Re: [dpdk-dev] [PATCH] drivers/net/nfb: add timestamp support

[Ferruh Yigit]

On 6/13/2019 1:05 PM, Rastislav Cernay wrote:
> From: Rastislav Cernay <cernay@netcope.com>
> 
> This patch adds timestamping support to nfb driver.
> 
> Signed-off-by: Rastislav Cernay <cernay@netcope.com>
> ---
>  config/common_base          |  1 +
>  doc/guides/nics/nfb.rst     | 22 ++++++++++++++++++++++
>  drivers/net/nfb/Makefile    |  5 +++++
>  drivers/net/nfb/meson.build |  4 ++++
>  drivers/net/nfb/nfb_rx.h    | 13 +++++++++++++
>  5 files changed, 45 insertions(+)
> 
> diff --git a/config/common_base b/config/common_base
> index 6f19ad5..f533136 100644
> --- a/config/common_base
> +++ b/config/common_base
> @@ -383,6 +383,7 @@ CONFIG_RTE_LIBRTE_PMD_SZEDATA2=n
>  # Compile software PMD backed by NFB device
>  #
>  CONFIG_RTE_LIBRTE_NFB_PMD=n
> +CONFIG_RTE_LIBRTE_NFB_HW_TIMESTAMP=n
>  
>  #
>  # Compile burst-oriented Cavium Thunderx NICVF PMD driver
> diff --git a/doc/guides/nics/nfb.rst b/doc/guides/nics/nfb.rst
> index 8df76c0..a172f9a 100644
> --- a/doc/guides/nics/nfb.rst
> +++ b/doc/guides/nics/nfb.rst
> @@ -69,6 +69,10 @@ These configuration options can be modified before compilation in the
>  
>     Value **y** enables compilation of nfb PMD.
>  
> +*  ``CONFIG_RTE_LIBRTE_NFB_HW_TIMESTAMP`` default value: **n**
> +
> +   Value **y** enables HW packet timestamping.
> +
>  Using the NFB PMD
>  ----------------------
>  
> @@ -142,3 +146,21 @@ Example output:
>       TX threshold registers: pthresh=0 hthresh=0 wthresh=0
>       TX RS bit threshold=0 - TXQ flags=0x0
>     testpmd>
> +
> +Timestamp
> +----------------
> +
> +Timestamping needs to be enabled during compile time, as there is no way
> +to check whether a timestamping unit is runnig during run time.

Even if this can't be detected on runtime, it should be possible to configure in
runtime with device args so need to compile the PMD again to change the behavior.

In this patch default behavior is no timestamps support, same can be done with
devargs, without any devargs timestamp support disable, but if user provides a
devarg, like "timestamp=1", feature enabled.

What do you think, can it be possible to convert runtime configuration?

Re: [dpdk-dev] [PATCH] drivers/net/nfb: add timestamp support

[Jan Remeš]

On Thu, Jun 27, 2019 at 5:45 PM Ferruh Yigit <ferruh.yigit@intel.com> wrote:
>
> On 6/13/2019 1:05 PM, Rastislav Cernay wrote:
> > +Timestamping needs to be enabled during compile time, as there is no way
> > +to check whether a timestamping unit is runnig during run time.
>
> Even if this can't be detected on runtime, it should be possible to configure in
> runtime with device args so need to compile the PMD again to change the behavior.
>
> In this patch default behavior is no timestamps support, same can be done with
> devargs, without any devargs timestamp support disable, but if user provides a
> devarg, like "timestamp=1", feature enabled.
>
> What do you think, can it be possible to convert runtime configuration?

This sounds good. We did not explore the devargs option. We will look
into it, and probably rework this patch and send v2.

Thanks,
  Jan

[dpdk-dev] [PATCH v2] drivers/net/nfb: add timestamp support

[Rastislav Cernay]

From: Rastislav Cernay <cernay@netcope.com>

This patch adds timestamping support to nfb driver.

Signed-off-by: Rastislav Cernay <cernay@netcope.com>
---
v2: rewrite timestamp enable to devargs
 doc/guides/nics/nfb.rst  | 19 +++++++++++++++++++
 drivers/net/nfb/nfb_rx.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/net/nfb/nfb_rx.h | 21 +++++++++++++++++++++
 3 files changed, 89 insertions(+)

diff --git a/doc/guides/nics/nfb.rst b/doc/guides/nics/nfb.rst
index 8df76c0..6258fd7 100644
--- a/doc/guides/nics/nfb.rst
+++ b/doc/guides/nics/nfb.rst
@@ -142,3 +142,22 @@ Example output:
      TX threshold registers: pthresh=0 hthresh=0 wthresh=0
      TX RS bit threshold=0 - TXQ flags=0x0
    testpmd>
+
+Timestamp
+----------------
+
+The PMD supports hardware timestamps of frame receipt on physical network interface. In order to use
+the timestamps, the hardware timestamping unit must be enabled (follow the documentation of the NFB
+products) and the device argument `timestamp=1` must be used.
+
+.. code-block:: console
+
+    $RTE_TARGET/app/testpmd -w b3:00.0,timestamp=1 <other EAL params> -- <testpmd params>
+
+When the timestamps are enabled with the *devarg*, a timestamp validity flag is set in the MBUFs
+containing received frames and timestamp is inserted into the `rte_mbuf` struct.
+
+The timestamp is an `uint64_t` field. Its lower 32 bits represent *seconds* portion of the timestamp
+(number of seconds elapsed since 1.1.1970 00:00:00 UTC) and its higher 32 bits represent
+*nanosecond* portion of the timestamp (number of nanoseconds elapsed since the beginning of the
+second in the *seconds* portion.
diff --git a/drivers/net/nfb/nfb_rx.c b/drivers/net/nfb/nfb_rx.c
index 9147b00..805d893 100644
--- a/drivers/net/nfb/nfb_rx.c
+++ b/drivers/net/nfb/nfb_rx.c
@@ -4,9 +4,53 @@
  * All rights reserved.
  */
 
+#include <rte_kvargs.h>
+
 #include "nfb_rx.h"
 #include "nfb.h"
 
+
+static int
+timestamp_check_handler(__rte_unused const char *key,
+	const char *value, __rte_unused void *opaque)
+{
+	if (strcmp(value, "1"))
+		return -1;
+
+	return 0;
+}
+
+
+static int
+nfb_check_timestamp(struct rte_devargs *devargs)
+{
+	struct rte_kvargs *kvlist;
+	const char *timestamp_key = "timestamp";
+
+	if (devargs == NULL)
+		return 0;
+
+	kvlist = rte_kvargs_parse(devargs->args, NULL);
+	if (kvlist == NULL)
+		return 0;
+
+	if (!rte_kvargs_count(kvlist, timestamp_key)) {
+		rte_kvargs_free(kvlist);
+		return 0;
+	}
+	/* Timestamps are enabled when there is
+	 * key-value pair: enable_timestamp=1
+	 */
+	if (rte_kvargs_process(kvlist, timestamp_key,
+		timestamp_check_handler, NULL) < 0) {
+		rte_kvargs_free(kvlist);
+		return 0;
+	}
+	rte_kvargs_free(kvlist);
+
+	return 1;
+}
+
 int
 nfb_eth_rx_queue_start(struct rte_eth_dev *dev, uint16_t rxq_id)
 {
@@ -70,6 +114,8 @@
 		return -ENOMEM;
 	}
 
+	rxq->flags = 0;
+
 	ret = nfb_eth_rx_queue_init(internals->nfb,
 		rx_queue_id,
 		dev->data->port_id,
@@ -81,6 +127,9 @@
 	else
 		rte_free(rxq);
 
+	if (nfb_check_timestamp(dev->device->devargs))
+		rxq->flags |= NFB_TIMESTAMP_FLAG;
+
 	return ret;
 }
 
diff --git a/drivers/net/nfb/nfb_rx.h b/drivers/net/nfb/nfb_rx.h
index 88a0307..cf3899b 100644
--- a/drivers/net/nfb/nfb_rx.h
+++ b/drivers/net/nfb/nfb_rx.h
@@ -13,11 +13,14 @@
 #include <rte_mbuf.h>
 #include <rte_ethdev.h>
 
+#define NFB_TIMESTAMP_FLAG (1 << 0)
+
 struct ndp_rx_queue {
 	struct nfb_device *nfb;	     /* nfb dev structure */
 	struct ndp_queue *queue;     /* rx queue */
 	uint16_t rx_queue_id;	     /* index */
 	uint8_t in_port;	     /* port */
+	uint8_t flags;               /* setup flags */
 
 	struct rte_mempool *mb_pool; /* memory pool to allocate packets */
 	uint16_t buf_size;           /* mbuf size */
@@ -129,6 +132,7 @@ struct ndp_rx_queue {
 	uint16_t nb_pkts)
 {
 	struct ndp_rx_queue *ndp = queue;
+	uint8_t timestamping_enabled;
 	uint16_t packet_size;
 	uint64_t num_bytes = 0;
 	uint16_t num_rx;
@@ -146,6 +150,8 @@ struct ndp_rx_queue {
 		return 0;
 	}
 
+	timestamping_enabled = ndp->flags & NFB_TIMESTAMP_FLAG;
+
 	/* returns either all or nothing */
 	i = rte_pktmbuf_alloc_bulk(ndp->mb_pool, mbufs, nb_pkts);
 	if (unlikely(i != 0))
@@ -181,6 +187,21 @@ struct ndp_rx_queue {
 
 			mbuf->pkt_len = packet_size;
 			mbuf->port = ndp->in_port;
+			mbuf->ol_flags = 0;
+
+			if (timestamping_enabled) {
+				/* nanoseconds */
+				mbuf->timestamp =
+					rte_le_to_cpu_32(*((uint32_t *)
+					(packets[i].header + 4)));
+				mbuf->timestamp <<= 32;
+				/* seconds */
+				mbuf->timestamp |=
+					rte_le_to_cpu_32(*((uint32_t *)
+					(packets[i].header + 8)));
+				mbuf->ol_flags |= PKT_RX_TIMESTAMP;
+			}
+
 			bufs[num_rx++] = mbuf;
 			num_bytes += packet_size;
 		} else {
-- 
1.8.3.1

Re: [dpdk-dev] [PATCH v2] drivers/net/nfb: add timestamp support

[Ferruh Yigit]

On 7/2/2019 11:32 AM, Rastislav Cernay wrote:
> From: Rastislav Cernay <cernay@netcope.com>
> 
> This patch adds timestamping support to nfb driver.
> 
> Signed-off-by: Rastislav Cernay <cernay@netcope.com>

<...>

> @@ -142,3 +142,22 @@ Example output:
>       TX threshold registers: pthresh=0 hthresh=0 wthresh=0
>       TX RS bit threshold=0 - TXQ flags=0x0
>     testpmd>
> +
> +Timestamp
> +----------------
> +
> +The PMD supports hardware timestamps of frame receipt on physical network interface. In order to use
> +the timestamps, the hardware timestamping unit must be enabled (follow the documentation of the NFB
> +products) and the device argument `timestamp=1` must be used.
> +
> +.. code-block:: console
> +
> +    $RTE_TARGET/app/testpmd -w b3:00.0,timestamp=1 <other EAL params> -- <testpmd params>
> +
> +When the timestamps are enabled with the *devarg*, a timestamp validity flag is set in the MBUFs
> +containing received frames and timestamp is inserted into the `rte_mbuf` struct.
> +
> +The timestamp is an `uint64_t` field. Its lower 32 bits represent *seconds* portion of the timestamp
> +(number of seconds elapsed since 1.1.1970 00:00:00 UTC) and its higher 32 bits represent
> +*nanosecond* portion of the timestamp (number of nanoseconds elapsed since the beginning of the
> +second in the *seconds* portion.

Can you please move this block of document under "Configuration" (because this
is runtime configuration) instead of end of the document. It is good to make two
different sections for config, please check i40e.rst for sample.

> diff --git a/drivers/net/nfb/nfb_rx.c b/drivers/net/nfb/nfb_rx.c
> index 9147b00..805d893 100644
> --- a/drivers/net/nfb/nfb_rx.c
> +++ b/drivers/net/nfb/nfb_rx.c
> @@ -4,9 +4,53 @@
>   * All rights reserved.
>   */
>  
> +#include <rte_kvargs.h>
> +

Shared build fails, can you please add "-lrte_kvargs" to "LDLIBS"

<...>

> +static int
> +nfb_check_timestamp(struct rte_devargs *devargs)
> +{
> +	struct rte_kvargs *kvlist;
> +	const char *timestamp_key = "timestamp";

This is device level argument, I think it is better to make it more visible more
than a string in a function. Common approach is define macros for devargs at the
begging of the file.

> +
> +	if (devargs == NULL)
> +		return 0;
> +
> +	kvlist = rte_kvargs_parse(devargs->args, NULL);
> +	if (kvlist == NULL)
> +		return 0;

It is common approach to provide valid_keys to parse, for your case there is
single command which is checked below, but in case user provide more (invalid)
arguments and expect them work, it is good to catch it and return error.

And if there will be a valid_keys check it is better to be out of timestamp
checks, in device init phase makes more sense.

> +
> +	if (!rte_kvargs_count(kvlist, timestamp_key)) {
> +		rte_kvargs_free(kvlist);
> +		return 0;
> +	}
> +	/* Timestamps are enabled when there is
> +	 * key-value pair: enable_timestamp=1
> +	 */
> +	if (rte_kvargs_process(kvlist, timestamp_key,
> +		timestamp_check_handler, NULL) < 0) {
> +		rte_kvargs_free(kvlist);
> +		return 0;
> +	}
> +	rte_kvargs_free(kvlist);
> +
> +	return 1;
> +}

Can you please add "RTE_PMD_REGISTER_PARAM_STRING" macro to list the device
arguments?

<...>

[dpdk-dev] [PATCH v3] drivers/net/nfb: add timestamp support

[Rastislav Cernay]

From: Rastislav Cernay <cernay@netcope.com>

This patch adds timestamping support to nfb driver.

Signed-off-by: Rastislav Cernay <cernay@netcope.com>
---
v2: rewrite timestamp enable to devargs
v3: check valid devargs
    move timestamp part of doc to configuration
    fix shared build
 doc/guides/nics/nfb.rst      | 20 +++++++++++++++++++
 drivers/net/nfb/Makefile     |  2 +-
 drivers/net/nfb/nfb.h        |  4 ++++
 drivers/net/nfb/nfb_ethdev.c | 18 +++++++++++++++++
 drivers/net/nfb/nfb_rx.c     | 47 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/net/nfb/nfb_rx.h     | 21 ++++++++++++++++++++
 6 files changed, 111 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/nfb.rst b/doc/guides/nics/nfb.rst
index 8df76c0..0e36c7e 100644
--- a/doc/guides/nics/nfb.rst
+++ b/doc/guides/nics/nfb.rst
@@ -69,6 +69,26 @@ These configuration options can be modified before compilation in the
 
    Value **y** enables compilation of nfb PMD.
 
+
+Timestamps
+
+The PMD supports hardware timestamps of frame receipt on physical network interface. In order to use
+the timestamps, the hardware timestamping unit must be enabled (follow the documentation of the NFB
+products) and the device argument `timestamp=1` must be used.
+
+.. code-block:: console
+
+    $RTE_TARGET/app/testpmd -w b3:00.0,timestamp=1 <other EAL params> -- <testpmd params>
+
+When the timestamps are enabled with the *devarg*, a timestamp validity flag is set in the MBUFs
+containing received frames and timestamp is inserted into the `rte_mbuf` struct.
+
+The timestamp is an `uint64_t` field. Its lower 32 bits represent *seconds* portion of the timestamp
+(number of seconds elapsed since 1.1.1970 00:00:00 UTC) and its higher 32 bits represent
+*nanosecond* portion of the timestamp (number of nanoseconds elapsed since the beginning of the
+second in the *seconds* portion.
+
+
 Using the NFB PMD
 ----------------------
 
diff --git a/drivers/net/nfb/Makefile b/drivers/net/nfb/Makefile
index a84b423..8bba2ac 100644
--- a/drivers/net/nfb/Makefile
+++ b/drivers/net/nfb/Makefile
@@ -16,7 +16,7 @@ INCLUDES :=-I$(SRCDIR)
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 CFLAGS += $(shell command -v pkg-config > /dev/null 2>&1 && pkg-config --cflags netcope-common)
-LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool
+LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool -lrte_kvargs
 LDLIBS += -lrte_ethdev -lrte_net
 LDLIBS += -lrte_bus_pci
 LDLIBS += $(shell command -v pkg-config > /dev/null 2>&1 && pkg-config --libs netcope-common)
diff --git a/drivers/net/nfb/nfb.h b/drivers/net/nfb/nfb.h
index 9d477ba..59d3ab4 100644
--- a/drivers/net/nfb/nfb.h
+++ b/drivers/net/nfb/nfb.h
@@ -36,6 +36,10 @@
 
 #define RTE_NFB_DRIVER_NAME net_nfb
 
+/* Device arguments */
+#define TIMESTAMP_ARG  "timestamp"
+static const char * const VALID_KEYS[] = {TIMESTAMP_ARG, NULL};
+
 struct pmd_internals {
 	uint16_t         max_rxmac;
 	uint16_t         max_txmac;
diff --git a/drivers/net/nfb/nfb_ethdev.c b/drivers/net/nfb/nfb_ethdev.c
index 7782195..ff2e5c7 100644
--- a/drivers/net/nfb/nfb_ethdev.c
+++ b/drivers/net/nfb/nfb_ethdev.c
@@ -10,6 +10,7 @@
 #include <netcope/txmac.h>
 
 #include <rte_ethdev_pci.h>
+#include <rte_kvargs.h>
 
 #include "nfb_stats.h"
 #include "nfb_rx.h"
@@ -419,6 +420,7 @@
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 	struct rte_pci_addr *pci_addr = &pci_dev->addr;
 	struct rte_ether_addr eth_addr_init;
+	struct rte_kvargs *kvlist;
 
 	RTE_LOG(INFO, PMD, "Initializing NFB device (" PCI_PRI_FMT ")\n",
 		pci_addr->domain, pci_addr->bus, pci_addr->devid,
@@ -429,6 +431,21 @@
 		pci_addr->domain, pci_addr->bus, pci_addr->devid,
 		pci_addr->function);
 
+	/* Check validity of device args */
+	if (dev->device->devargs != NULL &&
+			dev->device->devargs->args != NULL &&
+			strlen(dev->device->devargs->args) > 0) {
+		kvlist = rte_kvargs_parse(dev->device->devargs->args,
+						VALID_KEYS);
+		if (kvlist == NULL) {
+			RTE_LOG(ERR, PMD, "Failed to parse device arguments %s",
+				dev->device->devargs->args);
+			rte_kvargs_free(kvlist);
+			return -EINVAL;
+		}
+		rte_kvargs_free(kvlist);
+	}
+
 	/*
 	 * Get number of available DMA RX and TX queues, which is maximum
 	 * number of queues that can be created and store it in private device
@@ -579,3 +596,4 @@
 RTE_PMD_REGISTER_PCI(RTE_NFB_DRIVER_NAME, nfb_eth_driver);
 RTE_PMD_REGISTER_PCI_TABLE(RTE_NFB_DRIVER_NAME, nfb_pci_id_table);
 RTE_PMD_REGISTER_KMOD_DEP(RTE_NFB_DRIVER_NAME, "* nfb");
+RTE_PMD_REGISTER_PARAM_STRING(RTE_NFB_DRIVER_NAME, TIMESTAMP_ARG "=<0|1>");
diff --git a/drivers/net/nfb/nfb_rx.c b/drivers/net/nfb/nfb_rx.c
index 9147b00..d97179f 100644
--- a/drivers/net/nfb/nfb_rx.c
+++ b/drivers/net/nfb/nfb_rx.c
@@ -4,9 +4,51 @@
  * All rights reserved.
  */
 
+#include <rte_kvargs.h>
+
 #include "nfb_rx.h"
 #include "nfb.h"
 
+static int
+timestamp_check_handler(__rte_unused const char *key,
+	const char *value, __rte_unused void *opaque)
+{
+	if (strcmp(value, "1"))
+		return -1;
+
+	return 0;
+}
+
+
+static int
+nfb_check_timestamp(struct rte_devargs *devargs)
+{
+	struct rte_kvargs *kvlist;
+
+	if (devargs == NULL)
+		return 0;
+
+	kvlist = rte_kvargs_parse(devargs->args, NULL);
+	if (kvlist == NULL)
+		return 0;
+
+	if (!rte_kvargs_count(kvlist, TIMESTAMP_ARG)) {
+		rte_kvargs_free(kvlist);
+		return 0;
+	}
+	/* Timestamps are enabled when there is
+	 * key-value pair: enable_timestamp=1
+	 */
+	if (rte_kvargs_process(kvlist, TIMESTAMP_ARG,
+		timestamp_check_handler, NULL) < 0) {
+		rte_kvargs_free(kvlist);
+		return 0;
+	}
+	rte_kvargs_free(kvlist);
+
+	return 1;
+}
+
 int
 nfb_eth_rx_queue_start(struct rte_eth_dev *dev, uint16_t rxq_id)
 {
@@ -70,6 +112,8 @@
 		return -ENOMEM;
 	}
 
+	rxq->flags = 0;
+
 	ret = nfb_eth_rx_queue_init(internals->nfb,
 		rx_queue_id,
 		dev->data->port_id,
@@ -81,6 +125,9 @@
 	else
 		rte_free(rxq);
 
+	if (nfb_check_timestamp(dev->device->devargs))
+		rxq->flags |= NFB_TIMESTAMP_FLAG;
+
 	return ret;
 }
 
diff --git a/drivers/net/nfb/nfb_rx.h b/drivers/net/nfb/nfb_rx.h
index 88a0307..cf3899b 100644
--- a/drivers/net/nfb/nfb_rx.h
+++ b/drivers/net/nfb/nfb_rx.h
@@ -13,11 +13,14 @@
 #include <rte_mbuf.h>
 #include <rte_ethdev.h>
 
+#define NFB_TIMESTAMP_FLAG (1 << 0)
+
 struct ndp_rx_queue {
 	struct nfb_device *nfb;	     /* nfb dev structure */
 	struct ndp_queue *queue;     /* rx queue */
 	uint16_t rx_queue_id;	     /* index */
 	uint8_t in_port;	     /* port */
+	uint8_t flags;               /* setup flags */
 
 	struct rte_mempool *mb_pool; /* memory pool to allocate packets */
 	uint16_t buf_size;           /* mbuf size */
@@ -129,6 +132,7 @@ struct ndp_rx_queue {
 	uint16_t nb_pkts)
 {
 	struct ndp_rx_queue *ndp = queue;
+	uint8_t timestamping_enabled;
 	uint16_t packet_size;
 	uint64_t num_bytes = 0;
 	uint16_t num_rx;
@@ -146,6 +150,8 @@ struct ndp_rx_queue {
 		return 0;
 	}
 
+	timestamping_enabled = ndp->flags & NFB_TIMESTAMP_FLAG;
+
 	/* returns either all or nothing */
 	i = rte_pktmbuf_alloc_bulk(ndp->mb_pool, mbufs, nb_pkts);
 	if (unlikely(i != 0))
@@ -181,6 +187,21 @@ struct ndp_rx_queue {
 
 			mbuf->pkt_len = packet_size;
 			mbuf->port = ndp->in_port;
+			mbuf->ol_flags = 0;
+
+			if (timestamping_enabled) {
+				/* nanoseconds */
+				mbuf->timestamp =
+					rte_le_to_cpu_32(*((uint32_t *)
+					(packets[i].header + 4)));
+				mbuf->timestamp <<= 32;
+				/* seconds */
+				mbuf->timestamp |=
+					rte_le_to_cpu_32(*((uint32_t *)
+					(packets[i].header + 8)));
+				mbuf->ol_flags |= PKT_RX_TIMESTAMP;
+			}
+
 			bufs[num_rx++] = mbuf;
 			num_bytes += packet_size;
 		} else {
-- 
1.8.3.1

Re: [dpdk-dev] [PATCH v3] drivers/net/nfb: add timestamp support

[Ferruh Yigit]

On 7/15/2019 1:03 PM, Rastislav Cernay wrote:
> From: Rastislav Cernay <cernay@netcope.com>
> 
> This patch adds timestamping support to nfb driver.
> 
> Signed-off-by: Rastislav Cernay <cernay@netcope.com>

Applied to dpdk-next-net/master, thanks.