[dpdk-dev] [PATCH v2 14/38] event/octeontx: add SSO HW device operations

Jerin Jacob jerin.jacob at caviumnetworks.com
Fri Mar 31 21:34:41 CEST 2017


Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
Signed-off-by: Santosh Shukla <santosh.shukla at caviumnetworks.com>
Acked-by: Gage Eads <gage.eads at intel.com>
---
 drivers/event/octeontx/Makefile       |   5 ++
 drivers/event/octeontx/ssovf_evdev.h  |  30 ++++++++
 drivers/event/octeontx/ssovf_worker.c | 124 ++++++++++++++++++++++++++++++++++
 3 files changed, 159 insertions(+)
 create mode 100644 drivers/event/octeontx/ssovf_worker.c

diff --git a/drivers/event/octeontx/Makefile b/drivers/event/octeontx/Makefile
index 6e8227b..c921303 100644
--- a/drivers/event/octeontx/Makefile
+++ b/drivers/event/octeontx/Makefile
@@ -46,9 +46,14 @@ LIBABIVER := 1
 #
 # all source are stored in SRCS-y
 #
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF) += ssovf_worker.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF) += ssovf_evdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF) += ssovf_probe.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF) += ssovf_mbox.c
+ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
+CFLAGS_ssovf_worker.o += -fno-prefetch-loop-arrays
+endif
+CFLAGS_ssovf_worker.o += -Ofast
 
 # install this header file
 SYMLINK-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF)-include := rte_pmd_octeontx_ssovf.h
diff --git a/drivers/event/octeontx/ssovf_evdev.h b/drivers/event/octeontx/ssovf_evdev.h
index 16bf3d5..16846b8 100644
--- a/drivers/event/octeontx/ssovf_evdev.h
+++ b/drivers/event/octeontx/ssovf_evdev.h
@@ -129,6 +129,36 @@
 #define ssovf_read64 rte_read64_relaxed
 #define ssovf_write64 rte_write64_relaxed
 
+/* ARM64 specific functions */
+#if defined(RTE_ARCH_ARM64)
+#define ssovf_load_pair(val0, val1, addr) ({		\
+			asm volatile(			\
+			"ldp %x[x0], %x[x1], [%x[p1]]"	\
+			:[x0]"=r"(val0), [x1]"=r"(val1) \
+			:[p1]"r"(addr)			\
+			); })
+
+#define ssovf_store_pair(val0, val1, addr) ({		\
+			asm volatile(			\
+			"stp %x[x0], %x[x1], [%x[p1]]"	\
+			::[x0]"r"(val0), [x1]"r"(val1), [p1]"r"(addr) \
+			); })
+#else /* Un optimized functions for building on non arm64 arch */
+
+#define ssovf_load_pair(val0, val1, addr)		\
+do {							\
+	val0 = rte_read64(addr);			\
+	val1 = rte_read64(((uint8_t *)addr) + 8);	\
+} while (0)
+
+#define ssovf_store_pair(val0, val1, addr)		\
+do {							\
+	rte_write64(val0, addr);			\
+	rte_write64(val1, (((uint8_t *)addr) + 8));	\
+} while (0)
+#endif
+
+
 struct ssovf_evdev {
 	uint8_t max_event_queues;
 	uint8_t max_event_ports;
diff --git a/drivers/event/octeontx/ssovf_worker.c b/drivers/event/octeontx/ssovf_worker.c
new file mode 100644
index 0000000..052d158
--- /dev/null
+++ b/drivers/event/octeontx/ssovf_worker.c
@@ -0,0 +1,124 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) Cavium networks Ltd. 2017.
+ *
+ *   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 Cavium networks nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <rte_common.h>
+
+#include "ssovf_evdev.h"
+
+enum {
+	SSO_SYNC_ORDERED,
+	SSO_SYNC_ATOMIC,
+	SSO_SYNC_UNTAGGED,
+	SSO_SYNC_EMPTY
+};
+
+#ifndef force_inline
+#define force_inline inline __attribute__((always_inline))
+#endif
+
+#ifndef __hot
+#define __hot	__attribute__((hot))
+#endif
+
+/* SSO Operations */
+
+static force_inline uint16_t
+ssows_get_work(struct ssows *ws, struct rte_event *ev)
+{
+	uint64_t get_work0, get_work1;
+	uint64_t sched_type_queue;
+
+	ssovf_load_pair(get_work0, get_work1, ws->getwork);
+
+	sched_type_queue = (get_work0 >> 32) & 0xfff;
+	ws->cur_tt = sched_type_queue & 0x3;
+	ws->cur_grp = sched_type_queue >> 2;
+	sched_type_queue = sched_type_queue << 38;
+
+	ev->event = sched_type_queue | (get_work0 & 0xffffffff);
+	ev->u64 = get_work1;
+	return !!get_work1;
+}
+
+static force_inline void
+ssows_add_work(struct ssows *ws, const uint64_t event_ptr, const uint32_t tag,
+			const uint8_t new_tt, const uint8_t grp)
+{
+	uint64_t add_work0;
+
+	add_work0 = tag | ((uint64_t)(new_tt) << 32);
+	ssovf_store_pair(add_work0, event_ptr, ws->grps[grp]);
+}
+
+static force_inline void
+ssows_swtag_full(struct ssows *ws, const uint64_t event_ptr, const uint32_t tag,
+			const uint8_t new_tt, const uint8_t grp)
+{
+	uint64_t swtag_full0;
+
+	swtag_full0 = tag | ((uint64_t)(new_tt & 0x3) << 32) |
+				((uint64_t)grp << 34);
+	ssovf_store_pair(swtag_full0, event_ptr, (ws->base +
+				SSOW_VHWS_OP_SWTAG_FULL0));
+}
+
+static force_inline void
+ssows_swtag_norm(struct ssows *ws, uint32_t tag, uint8_t new_tt)
+{
+	uint64_t val;
+
+	val = tag | ((uint64_t)(new_tt & 0x3) << 32);
+	ssovf_write64(val, ws->base + SSOW_VHWS_OP_SWTAG_NORM);
+}
+
+static force_inline void
+ssows_swtag_untag(struct ssows *ws)
+{
+	ssovf_write64(0, ws->base + SSOW_VHWS_OP_SWTAG_UNTAG);
+	ws->cur_tt = SSO_SYNC_UNTAGGED;
+}
+
+static force_inline void
+ssows_desched(struct ssows *ws)
+{
+	ssovf_write64(0, ws->base + SSOW_VHWS_OP_DESCHED);
+}
+
+static force_inline void
+ssows_swtag_wait(struct ssows *ws)
+{
+	/* Wait for the SWTAG/SWTAG_FULL operation */
+	while (ssovf_read64(ws->base + SSOW_VHWS_SWTP))
+	;
+}
+
-- 
2.5.5



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