From mboxrd@z Thu Jan 1 00:00:00 1970 From: Slava Ovsiienko Subject: Re: [PATCH 2/4] net/mlx5: add reference counter for DV/DR structures Date: Wed, 3 Apr 2019 13:27:50 +0000 Message-ID: References: <1554186157-29455-1-git-send-email-viacheslavo@mellanox.com> <1554186157-29455-3-git-send-email-viacheslavo@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable To: Shahaf Shuler , "dev@dpdk.org" Return-path: Received: from EUR03-DB5-obe.outbound.protection.outlook.com (mail-eopbgr40053.outbound.protection.outlook.com [40.107.4.53]) by dpdk.org (Postfix) with ESMTP id 9F8A61B39A for ; Wed, 3 Apr 2019 15:27:52 +0200 (CEST) In-Reply-To: Content-Language: en-US List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" > -----Original Message----- > From: Shahaf Shuler > Sent: Tuesday, April 2, 2019 22:10 > To: Slava Ovsiienko ; dev@dpdk.org > Subject: RE: [PATCH 2/4] net/mlx5: add reference counter for DV/DR > structures >=20 > Tuesday, April 2, 2019 9:23 AM, Viacheslav Ovsiienko: > > Subject: [PATCH 2/4] net/mlx5: add reference counter for DV/DR > > structures >=20 > Same comment about the title. >=20 > > > > This patch introduces the reference counter for DV/DR flow engine > > structure, which we are going to share between master and representors > > in E-Switch configurations over multiport Infiniband device. > > > > Signed-off-by: Viacheslav Ovsiienko > > --- > > drivers/net/mlx5/mlx5.c | 26 ++++++++++++++++++++++++-- > > drivers/net/mlx5/mlx5.h | 4 ++++ > > 2 files changed, 28 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index > > 9de122d..79e0c17 100644 > > --- a/drivers/net/mlx5/mlx5.c > > +++ b/drivers/net/mlx5/mlx5.c > > @@ -299,7 +299,8 @@ struct mlx5_dev_spawn_data { #ifdef > > HAVE_MLX5DV_DR > > /** > > * Initialize DV/DR related data within private structure. > > - * This is preparation step for the data sharing. > > + * Routine checks the reference counter and does actual > > + * resources creation/iniialization only if counter is zero. > > * > > * @param[in] priv > > * Pointer to the private device data structure. > > @@ -314,6 +315,14 @@ struct mlx5_dev_spawn_data { > > int err =3D 0; > > void *ns; > > > > + assert(sh); > > + if (sh->dv_refcnt) { > > + /* Shared DV/DR structures is already initialized. */ > > + sh->dv_refcnt++; > > + priv->dv_shared =3D 1; > > + return 0; > > + } > > + /* Reference counter is zero, we should initialize structures. */ > > ns =3D mlx5dv_dr_create_ns(sh->ctx, > > MLX5DV_DR_NS_DOMAIN_INGRESS_BYPASS); > > if (!ns) { > > DRV_LOG(ERR, "ingress mlx5dv_dr_create_ns failed"); @@ - > > 328,6 +337,8 @@ struct mlx5_dev_spawn_data { > > goto error; > > } > > priv->tx_ns =3D ns; > > + sh->dv_refcnt++; > > + priv->dv_shared =3D 1; > > return 0; > > > > error: > > @@ -352,6 +363,16 @@ struct mlx5_dev_spawn_data { static void > > mlx5_free_shared_dv(struct mlx5_priv *priv) { > > + struct mlx5_ibv_shared *sh; > > + > > + if (!priv->dv_shared) > > + return; > > + priv->dv_shared =3D 0; > > + sh =3D priv->sh; > > + assert(sh); > > + assert(sh->dv_refcnt); > > + if (sh->dv_refcnt && --sh->dv_refcnt) > > + return; > > if (priv->rx_ns) { > > mlx5dv_dr_destroy_ns(priv->rx_ns); > > priv->rx_ns =3D NULL; > > @@ -1491,7 +1512,8 @@ struct mlx5_dev_spawn_data { > > error: > > if (priv) { > > #ifdef HAVE_MLX5DV_DR > > - mlx5_free_shared_dv(priv); > > + if (priv->sh) > > + mlx5_free_shared_dv(priv); > > #endif > > if (priv->nl_socket_route >=3D 0) > > close(priv->nl_socket_route); > > diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index > > a3d5f8e..56a2c61 100644 > > --- a/drivers/net/mlx5/mlx5.h > > +++ b/drivers/net/mlx5/mlx5.h > > @@ -213,6 +213,9 @@ struct mlx5_ibv_shared { > > char ibdev_name[IBV_SYSFS_NAME_MAX]; /* IB device name. */ > > char ibdev_path[IBV_SYSFS_PATH_MAX]; /* IB device path for > secondary > > */ > > struct ibv_device_attr_ex device_attr; /* Device properties. */ > > + /* Shared DV/DR flow data section. */ > > + uint32_t dv_refcnt; /* DV/DR data reference counter. */ > > + /* Shared interrupt handler section. */ > > pthread_mutex_t intr_mutex; /* Interrupt config mutex. */ > > uint32_t intr_cnt; /* Interrupt handler reference counter. */ > > struct rte_intr_handle intr_handle; /* Interrupt handler for device. > > */ @@ -244,6 +247,7 @@ struct mlx5_priv { > > unsigned int isolated:1; /* Whether isolated mode is enabled. */ > > unsigned int representor:1; /* Device is a port representor. */ > > unsigned int master:1; /* Device is a E-Switch master. */ > > + unsigned int dv_shared:1; /* DV/DR data is shared. */ >=20 > Why this flags is needed? Aren't we always going to share? I think we can get rid of this flag, because it is used for correct cleanup in device spawning routines If something goes wrong (on error exit) >=20 >=20 > > uint16_t domain_id; /* Switch domain identifier. */ > > uint16_t vport_id; /* Associated VF vport index (if any). */ > > int32_t representor_id; /* Port representor identifier. */ > > -- > > 1.8.3.1