[dpdk-dev] [PATCH 11/15] eal/tile: add EAL support for global mPIPE initialization

[Zhigang Lu <zlu@ezchip.com>]

The TileGx mPIPE hardware provides Ethernet connectivity,
packet classification, and packet load balancing services.

Signed-off-by: Zhigang Lu <zlu@ezchip.com>
Signed-off-by: Cyril Chemparathy <cchemparathy@ezchip.com>
---
 .../common/include/arch/tile/rte_mpipe.h           |  67 ++++++++++
 lib/librte_eal/linuxapp/eal/Makefile               |   3 +
 lib/librte_eal/linuxapp/eal/eal.c                  |   9 ++
 lib/librte_eal/linuxapp/eal/eal_mpipe_tile.c       | 147 +++++++++++++++++++++
 mk/rte.app.mk                                      |   4 +
 5 files changed, 230 insertions(+)
 create mode 100644 lib/librte_eal/common/include/arch/tile/rte_mpipe.h
 create mode 100644 lib/librte_eal/linuxapp/eal/eal_mpipe_tile.c

diff --git a/lib/librte_eal/common/include/arch/tile/rte_mpipe.h b/lib/librte_eal/common/include/arch/tile/rte_mpipe.h
new file mode 100644
index 0000000..11b6485
--- /dev/null
+++ b/lib/librte_eal/common/include/arch/tile/rte_mpipe.h
@@ -0,0 +1,67 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2014 Tilera 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 Tilera Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_TILE_MPIPE_H_
+#define _RTE_TILE_MPIPE_H_
+
+#define ARCH_ATOMIC_NO_NICKNAMES
+
+#include <gxio/mpipe.h>
+#include <arch/mpipe_xaui_def.h>
+#include <arch/mpipe_gbe_def.h>
+
+#define BSM_ALIGN_SIZE 128
+
+struct rte_eal_mpipe_channel_config {
+	int enable;
+	int first_bucket;
+	int num_buckets;
+	int headroom;
+	gxio_mpipe_rules_stacks_t stacks;
+};
+
+#define __bsm_aligned __attribute__((__aligned__(BSM_ALIGN_SIZE)))
+
+extern int rte_eal_mpipe_instances;
+
+extern int
+rte_eal_mpipe_init(void);
+
+extern gxio_mpipe_context_t *
+rte_eal_mpipe_context(int instance);
+
+extern int
+rte_eal_mpipe_channel_config(int instance, int channel,
+			     struct rte_eal_mpipe_channel_config *config);
+
+#endif /* _RTE_TILE_MPIPE_H_ */
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index 72ecf3a..99536b6 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -70,6 +70,9 @@ SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_alarm.c
 ifeq ($(CONFIG_RTE_LIBRTE_IVSHMEM),y)
 SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_ivshmem.c
 endif
+ifeq ($(CONFIG_RTE_ARCH),"tile")
+SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_mpipe_tile.c
+endif
 
 # from common dir
 SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_memzone.c
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 89f3b5e..c97a090 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -78,6 +78,10 @@
 #include <malloc_heap.h>
 #include <rte_eth_ring.h>
 
+#ifdef RTE_ARCH_TILE
+#include <rte_mpipe.h>
+#endif
+
 #include "eal_private.h"
 #include "eal_thread.h"
 #include "eal_internal_cfg.h"
@@ -755,6 +759,11 @@ rte_eal_init(int argc, char **argv)
 	if (rte_eal_pci_init() < 0)
 		rte_panic("Cannot init PCI\n");
 
+#ifdef RTE_ARCH_TILE
+	if (rte_eal_mpipe_init() < 0)
+		rte_panic("Cannot init mPIPE\n");
+#endif
+
 #ifdef RTE_LIBRTE_IVSHMEM
 	if (rte_eal_ivshmem_init() < 0)
 		rte_panic("Cannot init IVSHMEM\n");
diff --git a/lib/librte_eal/linuxapp/eal/eal_mpipe_tile.c b/lib/librte_eal/linuxapp/eal/eal_mpipe_tile.c
new file mode 100644
index 0000000..7b0f94b
--- /dev/null
+++ b/lib/librte_eal/linuxapp/eal/eal_mpipe_tile.c
@@ -0,0 +1,147 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2014 Tilera Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Tilera Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <sys/mman.h>
+#include <sys/queue.h>
+#include <pthread.h>
+#include <errno.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_cycles.h>
+#include <rte_tailq.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_spinlock.h>
+#include <rte_eal.h>
+#include <rte_debug.h>
+
+#include <rte_mpipe.h>
+
+#include "eal_private.h"
+#include "eal_internal_cfg.h"
+
+#define MPIPE_MAX_CHANNELS	128
+
+struct rte_eal_mpipe_context {
+	rte_spinlock_t        lock;
+	gxio_mpipe_context_t  context;
+	struct rte_eal_mpipe_channel_config channels[MPIPE_MAX_CHANNELS];
+};
+
+struct rte_eal_mpipe_context rte_eal_mpipe_contexts[GXIO_MPIPE_INSTANCE_MAX];
+int rte_eal_mpipe_instances;
+
+int
+rte_eal_mpipe_init(void)
+{
+	struct rte_eal_mpipe_context *context;
+	int rc, instance;
+
+	for (instance = 0; instance < GXIO_MPIPE_INSTANCE_MAX; instance++) {
+		context = &rte_eal_mpipe_contexts[instance];
+
+		rte_spinlock_init(&context->lock);
+		rc = gxio_mpipe_init(&context->context,
+				     instance);
+		if (rc < 0)
+			break;
+	}
+
+	rte_eal_mpipe_instances = instance;
+
+	return instance ? 0 : -ENODEV;
+}
+
+gxio_mpipe_context_t *
+rte_eal_mpipe_context(int instance)
+{
+	if (instance < 0 || instance >= rte_eal_mpipe_instances)
+		return NULL;
+	return &rte_eal_mpipe_contexts[instance].context;
+}
+
+int
+rte_eal_mpipe_channel_config(int instance, int channel,
+			     struct rte_eal_mpipe_channel_config *config)
+{
+	struct rte_eal_mpipe_channel_config *data;
+	struct rte_eal_mpipe_context *context;
+	gxio_mpipe_rules_t rules;
+	int idx, rc = 0;
+
+	if (instance < 0 || instance >= rte_eal_mpipe_instances ||
+	    channel < 0 || channel >= MPIPE_MAX_CHANNELS)
+		return -EINVAL;
+
+	context = &rte_eal_mpipe_contexts[instance];
+
+	rte_spinlock_lock(&context->lock);
+
+	gxio_mpipe_rules_init(&rules, &context->context);
+
+	for (idx = 0; idx < MPIPE_MAX_CHANNELS; idx++) {
+		data = (channel == idx) ? config : &context->channels[idx];
+
+		if (!data->enable)
+			continue;
+
+		rc = gxio_mpipe_rules_begin(&rules, data->first_bucket,
+					    data->num_buckets, &data->stacks);
+		if (rc < 0)
+			goto done;
+
+		rc = gxio_mpipe_rules_add_channel(&rules, idx);
+		if (rc < 0)
+			goto done;
+
+		rc = gxio_mpipe_rules_set_headroom(&rules, data->headroom);
+		if (rc < 0)
+			goto done;
+	}
+
+	rc = gxio_mpipe_rules_commit(&rules);
+	if (rc == 0)
+		memcpy(&context->channels[channel], config, sizeof(*config));
+
+done:
+	rte_spinlock_unlock(&context->lock);
+
+	return rc;
+}
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index 84ec4df..565aa77 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -170,6 +170,10 @@ LDLIBS += -lrte_pmd_xenvirt
 LDLIBS += -lxenstore
 endif
 
+ifeq ($(CONFIG_RTE_ARCH),"tile")
+LDLIBS += -lgxio
+endif
+
 ifeq ($(CONFIG_RTE_BUILD_SHARED_LIB),n)
 # plugins (link only if static libraries)
 
-- 
2.1.2