[dpdk-dev] [PATCH v3 11/25] common/mlx5: glue event interrupt commands

[Matan Azrad <matan@mellanox.com>]

Add the next commands to glue in order to support interrupt event
channel operations associated to events in the EQ:
	devx_create_event_channel,
	devx_destroy_event_channel,
	devx_subscribe_devx_event,
	devx_subscribe_devx_event_fd,
	devx_get_event.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/common/mlx5/Makefile    |  5 +++
 drivers/common/mlx5/meson.build |  2 ++
 drivers/common/mlx5/mlx5_glue.c | 79 +++++++++++++++++++++++++++++++++++++++++
 drivers/common/mlx5/mlx5_glue.h | 25 +++++++++++++
 4 files changed, 111 insertions(+)

diff --git a/drivers/common/mlx5/Makefile b/drivers/common/mlx5/Makefile
index 66585b2..7110231 100644
--- a/drivers/common/mlx5/Makefile
+++ b/drivers/common/mlx5/Makefile
@@ -154,6 +154,11 @@ mlx5_autoconf.h.new: $(RTE_SDK)/buildtools/auto-config-h.sh
 		func mlx5dv_dr_action_create_dest_devx_tir \
 		$(AUTOCONF_OUTPUT)
 	$Q sh -- '$<' '$@' \
+		HAVE_IBV_DEVX_EVENT \
+		infiniband/mlx5dv.h \
+		func mlx5dv_devx_get_event \
+		$(AUTOCONF_OUTPUT)
+	$Q sh -- '$<' '$@' \
 		HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER \
 		infiniband/mlx5dv.h \
 		func mlx5dv_dr_action_create_flow_meter \
diff --git a/drivers/common/mlx5/meson.build b/drivers/common/mlx5/meson.build
index 718cef2..76ca7d7 100644
--- a/drivers/common/mlx5/meson.build
+++ b/drivers/common/mlx5/meson.build
@@ -108,6 +108,8 @@ if build
 		'mlx5dv_devx_obj_query_async' ],
 		[ 'HAVE_MLX5DV_DR_ACTION_DEST_DEVX_TIR', 'infiniband/mlx5dv.h',
 		'mlx5dv_dr_action_create_dest_devx_tir' ],
+		[ 'HAVE_IBV_DEVX_EVENT', 'infiniband/mlx5dv.h',
+		'mlx5dv_devx_get_event' ],
 		[ 'HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER', 'infiniband/mlx5dv.h',
 		'mlx5dv_dr_action_create_flow_meter' ],
 		[ 'HAVE_MLX5DV_MMAP_GET_NC_PAGES_CMD', 'infiniband/mlx5dv.h',
diff --git a/drivers/common/mlx5/mlx5_glue.c b/drivers/common/mlx5/mlx5_glue.c
index fedce77..e4eabdb 100644
--- a/drivers/common/mlx5/mlx5_glue.c
+++ b/drivers/common/mlx5/mlx5_glue.c
@@ -1063,6 +1063,80 @@
 #endif
 }
 
+static struct mlx5dv_devx_event_channel *
+mlx5_glue_devx_create_event_channel(struct ibv_context *ctx, int flags)
+{
+#ifdef HAVE_IBV_DEVX_EVENT
+	return mlx5dv_devx_create_event_channel(ctx, flags);
+#else
+	(void)ctx;
+	(void)flags;
+	errno = ENOTSUP;
+	return NULL;
+#endif
+}
+
+static void
+mlx5_glue_devx_destroy_event_channel(struct mlx5dv_devx_event_channel *eventc)
+{
+#ifdef HAVE_IBV_DEVX_EVENT
+	mlx5dv_devx_destroy_event_channel(eventc);
+#else
+	(void)eventc;
+#endif
+}
+
+static int
+mlx5_glue_devx_subscribe_devx_event(struct mlx5dv_devx_event_channel *eventc,
+				    struct mlx5dv_devx_obj *obj,
+				    uint16_t events_sz, uint16_t events_num[],
+				    uint64_t cookie)
+{
+#ifdef HAVE_IBV_DEVX_EVENT
+	return mlx5dv_devx_subscribe_devx_event(eventc, obj, events_sz,
+						events_num, cookie);
+#else
+	(void)eventc;
+	(void)obj;
+	(void)events_sz;
+	(void)events_num;
+	(void)cookie;
+	return -ENOTSUP;
+#endif
+}
+
+static int
+mlx5_glue_devx_subscribe_devx_event_fd(struct mlx5dv_devx_event_channel *eventc,
+				       int fd, struct mlx5dv_devx_obj *obj,
+				       uint16_t event_num)
+{
+#ifdef HAVE_IBV_DEVX_EVENT
+	return mlx5dv_devx_subscribe_devx_event_fd(eventc, fd, obj, event_num);
+#else
+	(void)eventc;
+	(void)fd;
+	(void)obj;
+	(void)event_num;
+	return -ENOTSUP;
+#endif
+}
+
+static ssize_t
+mlx5_glue_devx_get_event(struct mlx5dv_devx_event_channel *eventc,
+			 struct mlx5dv_devx_async_event_hdr *event_data,
+			 size_t event_resp_len)
+{
+#ifdef HAVE_IBV_DEVX_EVENT
+	return mlx5dv_devx_get_event(eventc, event_data, event_resp_len);
+#else
+	(void)eventc;
+	(void)event_data;
+	(void)event_resp_len;
+	errno = ENOTSUP;
+	return -1;
+#endif
+}
+
 alignas(RTE_CACHE_LINE_SIZE)
 const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue){
 	.version = MLX5_GLUE_VERSION,
@@ -1163,4 +1237,9 @@
 	.devx_port_query = mlx5_glue_devx_port_query,
 	.dr_dump_domain = mlx5_glue_dr_dump_domain,
 	.devx_query_eqn = mlx5_glue_devx_query_eqn,
+	.devx_create_event_channel = mlx5_glue_devx_create_event_channel,
+	.devx_destroy_event_channel = mlx5_glue_devx_destroy_event_channel,
+	.devx_subscribe_devx_event = mlx5_glue_devx_subscribe_devx_event,
+	.devx_subscribe_devx_event_fd = mlx5_glue_devx_subscribe_devx_event_fd,
+	.devx_get_event = mlx5_glue_devx_get_event,
 };
diff --git a/drivers/common/mlx5/mlx5_glue.h b/drivers/common/mlx5/mlx5_glue.h
index fe51f97..6fc00dd 100644
--- a/drivers/common/mlx5/mlx5_glue.h
+++ b/drivers/common/mlx5/mlx5_glue.h
@@ -86,6 +86,12 @@
 struct mlx5dv_dr_flow_meter_attr;
 #endif
 
+#ifndef HAVE_IBV_DEVX_EVENT
+struct mlx5dv_devx_event_channel { int fd; };
+struct mlx5dv_devx_async_event_hdr;
+#define MLX5DV_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA 1
+#endif
+
 /* LIB_GLUE_VERSION must be updated every time this structure is modified. */
 struct mlx5_glue {
 	const char *version;
@@ -261,6 +267,25 @@ struct mlx5_glue {
 	int (*dr_dump_domain)(FILE *file, void *domain);
 	int (*devx_query_eqn)(struct ibv_context *context, uint32_t cpus,
 			      uint32_t *eqn);
+	struct mlx5dv_devx_event_channel *(*devx_create_event_channel)
+				(struct ibv_context *context, int flags);
+	void (*devx_destroy_event_channel)
+			(struct mlx5dv_devx_event_channel *event_channel);
+	int (*devx_subscribe_devx_event)
+			(struct mlx5dv_devx_event_channel *event_channel,
+			 struct mlx5dv_devx_obj *obj,
+			 uint16_t events_sz,
+			 uint16_t events_num[],
+			 uint64_t cookie);
+	int (*devx_subscribe_devx_event_fd)
+			(struct mlx5dv_devx_event_channel *event_channel,
+			 int fd,
+			 struct mlx5dv_devx_obj *obj,
+			 uint16_t event_num);
+	ssize_t (*devx_get_event)
+			(struct mlx5dv_devx_event_channel *event_channel,
+			 struct mlx5dv_devx_async_event_hdr *event_data,
+			 size_t event_resp_len);
 };
 
 const struct mlx5_glue *mlx5_glue;
-- 
1.8.3.1