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From: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
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Date: Tue, 3 Nov 2015 17:38:43 +0100
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Subject: [dpdk-dev] [PATCH v3 2/7] net: Add common PTP structures and
functions
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This patch add common functions and structures used for PTP processing.
Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
---
lib/librte_net/Makefile | 2 +-
lib/librte_net/rte_ptp.h | 105 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 106 insertions(+), 1 deletion(-)
create mode 100644 lib/librte_net/rte_ptp.h
diff --git a/lib/librte_net/Makefile b/lib/librte_net/Makefile
index ad2e482..1d33618 100644
--- a/lib/librte_net/Makefile
+++ b/lib/librte_net/Makefile
@@ -34,7 +34,7 @@ include $(RTE_SDK)/mk/rte.vars.mk
CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3
# install includes
-SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include := rte_ip.h rte_tcp.h rte_udp.h rte_sctp.h rte_icmp.h rte_arp.h
+SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include := rte_ip.h rte_tcp.h rte_udp.h rte_sctp.h rte_icmp.h rte_arp.h rte_ptp.h
include $(RTE_SDK)/mk/rte.install.mk
diff --git a/lib/librte_net/rte_ptp.h b/lib/librte_net/rte_ptp.h
new file mode 100644
index 0000000..8a4c83c
--- /dev/null
+++ b/lib/librte_net/rte_ptp.h
@@ -0,0 +1,105 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define NSEC_PER_SEC 1000000000L
+
+/*
+ * Structure for cyclecounter IEEE1588 functionality.
+ */
+struct cyclecounter {
+ uint64_t (*read)(struct rte_eth_dev *dev);
+ uint64_t mask;
+ uint32_t shift;
+};
+
+/*
+ * Structure to hold and calculate Unix epoch time.
+ */
+struct timecounter {
+ struct cyclecounter *cc;
+ uint64_t cycle_last;
+ uint64_t nsec;
+ uint64_t mask;
+ uint64_t frac;
+};
+
+
+/* Utility functions for PTP/IEEE1588 support. */
+
+static inline uint64_t
+timespec_to_ns(const struct timespec *ts)
+{
+ return ((uint64_t) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
+}
+
+static inline struct timespec
+ns_to_timespec(uint64_t nsec)
+{
+ struct timespec ts = {0, 0};
+
+ if (nsec == 0)
+ return ts;
+
+ ts.tv_sec = nsec / NSEC_PER_SEC;
+ ts.tv_nsec = nsec % NSEC_PER_SEC;
+
+ return ts;
+}
+
+/*
+ * Converts cycle counter cycles to nanoseconds.
+ */
+static inline uint64_t
+cyclecounter_cycles_to_ns(const struct cyclecounter *cc,
+ uint64_t cycles, uint64_t mask, uint64_t *frac)
+{
+ uint64_t ns;
+
+ /* Add fractional nanoseconds */
+ ns = cycles + *frac;
+ *frac = ns & mask;
+
+ /* Shift to get only nanoseconds. */
+ return ns >> cc->shift;
+}
+
+/*
+ * Like cyclecounter_cycles_to_ns(), but this is used when
+ * computing a time previous to the stored in the cycle counter.
+ */
+static inline uint64_t
+cyclecounter_cycles_to_ns_backwards(const struct cyclecounter *cc,
+ uint64_t cycles, uint64_t frac)
+{
+ return ((cycles - frac) >> cc->shift);
+}
--
2.1.0