Thanks, PSB.
> -----Original Message-----
> From: Yongseok Koh
> Sent: Wednesday, October 3, 2018 9:58 AM
> To: Dekel Peled <dek...@mellanox.com>
> Cc: dev@dpdk.org; Shahaf Shuler <shah...@mellanox.com>; Ori Kam
> <or...@mellanox.com>
> Subject: Re: [PATCH 3/4] net/mlx5: add DV encap L2 and L3 operations
>
> On Thu, Sep 27, 2018 at 05:50:44PM +0300, Dekel Peled wrote:
> > This patch adds support for Direct Verbs encap operations, L2 and L3.
> >
> > Signed-off-by: Dekel Peled <dek...@mellanox.com>
> > ---
> > drivers/net/mlx5/mlx5_flow_dv.c | 249
> > +++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 244 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/mlx5/mlx5_flow_dv.c
> > b/drivers/net/mlx5/mlx5_flow_dv.c index 1f3fcb8..50925ac 100644
> > --- a/drivers/net/mlx5/mlx5_flow_dv.c
> > +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> > @@ -85,6 +85,178 @@
> > }
> >
> > /**
> > + * Validate the tunnel encap action.
> > + *
> > + * @param[in] action_flags
> > + * holds the actions detected until now.
> > + * @param[in] action
> > + * Pointer to the encap action.
> > + * @param[in] attr
> > + * Pointer to flow attributes
> > + * @param[out] error
> > + * Pointer to error structure.
> > + *
> > + * @return
> > + * 0 on success, a negative errno value otherwise and rte_ernno is set.
> > + */
> > +static int
> > +mlx5_flow_validate_action_tunnel_encap(uint64_t action_flags,
>
> A static func in this file should start from flow_dv_. Or, you can move these
> to mlx5_flow.c as general validation helpers. I prefer the latter.
Renamed functions to flow_dv_validate_action_tunnel_...
Left it as static in mlx5_flow_dv.c, since it is relevant for DV only.
>
> > + const struct rte_flow_action *action,
> > + const struct rte_flow_attr *attr,
> > + struct rte_flow_error *error) {
> > + const struct rte_flow_action_tunnel_encap *tunnel_encap =
> > +action->conf;
> > +
> > + if (!tunnel_encap || !(tunnel_encap->buf))
> > + return rte_flow_error_set(error, EINVAL,
> > + RTE_FLOW_ERROR_TYPE_ACTION,
> > + action,
>
> Two lines above can be merged? Please check others and merge lines as
> much as possible.
Done.
>
> > + "configuration cannot be null");
> > + if (action_flags & MLX5_ACTION_DROP)
> > + return rte_flow_error_set(error,
> > + ENOTSUP,
> > + RTE_FLOW_ERROR_TYPE_ACTION,
> > + NULL,
> > + "can't drop and encap in same
> flow");
> > + if (action_flags & (MLX5_ACTION_TUNNEL_ENCAP |
> > + MLX5_ACTION_TUNNEL_ENCAP_L3))
> > + return rte_flow_error_set(error,
> > + ENOTSUP,
> > + RTE_FLOW_ERROR_TYPE_ACTION,
> > + NULL,
> > + "can't have 2 encap actions in same"
> > + " flow");
> > + if (attr->ingress)
> > + return rte_flow_error_set(error, ENOTSUP,
> > +
> RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
> > + NULL,
> > + "encap action not supported for "
> > + "ingress");
> > + return 0;
> > +}
> > +
> > +/**
> > + * Validate the tunnel encap L3 action
> > + *
> > + * @param[in] action_flags
> > + * holds the actions detected until now.
> > + * @param[in] action
> > + * Pointer to the encap action.
> > + * @param[in] attr
> > + * Pointer to flow attributes
> > + * @param[out] error
> > + * Pointer to error structure.
> > + *
> > + * @return
> > + * 0 on success, a negative errno value otherwise and rte_ernno is set.
> > + */
> > +static int
> > +mlx5_flow_validate_action_tunnel_encap_l3(uint64_t action_flags,
> > + const struct rte_flow_action *action,
> > + const struct rte_flow_attr *attr,
> > + struct rte_flow_error *error)
> > +{
> > + const struct rte_flow_action_tunnel_encap_l3 *tunnel_encap_l3 =
> > + action->conf;
>
> Indentation.
>
> const struct rte_flow_action_tunnel_encap_l3 *tunnel_encap_l3 =
> action->conf;
Done.
>
> > +
> > + if (!tunnel_encap_l3 || !(tunnel_encap_l3->buf))
> > + return rte_flow_error_set(error, EINVAL,
> > + RTE_FLOW_ERROR_TYPE_ACTION,
> > + action,
> > + "configuration cannot be null");
> > + if (action_flags & MLX5_ACTION_DROP)
> > + return rte_flow_error_set(error,
> > + ENOTSUP,
> > + RTE_FLOW_ERROR_TYPE_ACTION,
> > + NULL,
> > + "can't drop and encap in same
> flow");
> > + if (action_flags & (MLX5_ACTION_TUNNEL_ENCAP |
> > + MLX5_ACTION_TUNNEL_ENCAP_L3))
> > + return rte_flow_error_set(error,
> > + ENOTSUP,
> > + RTE_FLOW_ERROR_TYPE_ACTION,
> > + NULL,
> > + "can't have 2 encap actions in same"
> > + " flow");
> > + if (attr->ingress)
> > + return rte_flow_error_set(error, ENOTSUP,
> > +
> RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
> > + NULL,
> > + "encap action not supported for "
> > + "ingress");
> > + return 0;
> > +}
> > +
> > +/**
> > + * Convert encap action to DV specification.
> > + *
> > + * @param[in] action
> > + * Pointer to action structure.
> > + * @param[in] ctx
> > + * Verbs context.
> > + * @param[out] error
> > + * Pointer to the error structure.
> > + *
> > + * @return
> > + * Pointer to action on success, NULL otherwise and rte_errno is set.
> > + */
> > +static struct ibv_flow_action *
> > +mlx5_flow_dv_create_encap(const struct rte_flow_action *action,
>
> Change to flow_dv_create_encap()
Done.
>
> > + struct ibv_context *ctx,
> > + struct rte_flow_error *error)
> > +{
> > + struct ibv_flow_action *encap_verb = NULL;
> > + const struct rte_flow_action_tunnel_encap *encap_data;
> > +
> > + encap_data = (const struct rte_flow_action_tunnel_encap *)action-
> >conf;
> > + encap_verb = mlx5_glue-
> >dv_create_flow_action_packet_reformat(ctx,
> > + encap_data->size,
> > + encap_data->size ? encap_data->buf :
> > + NULL,
> > +
> MLX5DV_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TO_L2_TU
> NNEL,
> > + MLX5DV_FLOW_TABLE_TYPE_NIC_TX);
>
> Indentation.
I'm using very long MLX5DV_... names defined in rdma-core.
If I use the required indentation I get illegal line length.
>
> encap_verb = mlx5_glue->dv_create_flow_action_packet_reformat
> (ctx, encap_data->size,
> encap_data->size ? encap_data->buf : NULL,
>
> MLX5DV_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TO_L2_TUNNEL,
> MLX5DV_FLOW_TABLE_TYPE_NIC_TX);
>
> Please make the same change to others.
>
> > + if (!encap_verb)
> > + rte_flow_error_set(error, EINVAL,
> RTE_FLOW_ERROR_TYPE_ACTION,
> > + NULL, "cannot create encap action");
> > + return encap_verb;
> > +}
> > +
> > +/**
> > + * Convert encap L3 action to DV specification.
> > + *
> > + * @param[in] action
> > + * Pointer to action structure.
> > + * @param[in] ctx
> > + * Verbs context.
> > + * @param[out] error
> > + * Pointer to the error structure.
> > + *
> > + * @return
> > + * Pointer to action on success, NULL otherwise and rte_errno is set.
> > + */
> > +static struct ibv_flow_action *
> > +mlx5_flow_dv_create_encap_l3(const struct rte_flow_action *action,
>
> Change to flow_dv_create_encap_l3()
Done.
>
> > + struct ibv_context *ctx,
> > + struct rte_flow_error *error) {
> > + struct ibv_flow_action *encap_l3_verb = NULL;
> > + const struct rte_flow_action_tunnel_encap_l3 *encap_l3_data;
> > +
> > + encap_l3_data =
> > + (const struct rte_flow_action_tunnel_encap_l3 *)action-
> >conf;
> > + encap_l3_verb = mlx5_glue-
> >dv_create_flow_action_packet_reformat(ctx,
> > + encap_l3_data->size,
> > + encap_l3_data->size ? encap_l3_data->buf :
> > + NULL,
> > +
> MLX5DV_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TO_L3_TU
> NNEL,
> > + MLX5DV_FLOW_TABLE_TYPE_NIC_TX);
> > + if (!encap_l3_verb)
> > + rte_flow_error_set(error, EINVAL,
> RTE_FLOW_ERROR_TYPE_ACTION,
> > + NULL, "cannot create encap L3 action");
> > + return encap_l3_verb;
> > +}
> > +
> > +/**
> > * Verify the @p attributes will be correctly understood by the NIC and
> store
> > * them in the @p flow if everything is correct.
> > *
> > @@ -337,6 +509,26 @@
> > action_flags |= MLX5_ACTION_COUNT;
> > ++actions_n;
> > break;
> > + case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP:
> > + ret = mlx5_flow_validate_action_tunnel_encap
> > + (action_flags,
> > + actions,
> > + attr,
> > + error);
>
> Can be one line.
Done.
>
> > + if (ret < 0)
> > + return ret;
> > + action_flags |= MLX5_ACTION_TUNNEL_ENCAP;
> > + break;
> > + case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP_L3:
> > + ret = mlx5_flow_validate_action_tunnel_encap_l3
> > + (action_flags,
> > + actions,
> > + attr,
> > + error);
> > + if (ret < 0)
> > + return ret;
> > + action_flags |= MLX5_ACTION_TUNNEL_ENCAP_L3;
> > + break;
> > default:
> > return rte_flow_error_set(error, ENOTSUP,
> >
> RTE_FLOW_ERROR_TYPE_ACTION,
> > @@ -1047,10 +1239,19 @@
> > * Flow action to translate.
> > * @param[in, out] dev_flow
> > * Pointer to the mlx5_flow.
> > + * @param[in] ctx
> > + * Verbs context.
> > + * @param[out] error
> > + * Pointer to the error structure.
> > + *
> > + * @return
> > + * 0 on success, a negative errno value otherwise and rte_ernno is set.
> > */
> > -static void
> > +static int
> > flow_dv_create_action(const struct rte_flow_action *action,
> > - struct mlx5_flow *dev_flow)
> > + struct mlx5_flow *dev_flow,
> > + struct ibv_context *ctx,
>
> If it is just priv->ctx, it would be better to get dev as an arg and make
> mlx5_flow_dv_create_encap*(dev, ...) gets priv->ctx from dev.
I considered it during implementation, but preferred to give the functions only
what they need.
>
> > + struct rte_flow_error *error)
> > {
> > const struct rte_flow_action_queue *queue;
> > const struct rte_flow_action_rss *rss; @@ -1095,10 +1296,35 @@
> > /* Added to array only in apply since we need the QP */
> > flow->actions |= MLX5_ACTION_RSS;
> > break;
> > + case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP:
> > + dev_flow->dv.actions[actions_n].type =
> > + MLX5DV_FLOW_ACTION_IBV_FLOW_ACTION;
> > + dev_flow->dv.actions[actions_n].action =
> > + mlx5_flow_dv_create_encap(action, ctx, error);
> > + if (!(dev_flow->dv.actions[actions_n].action))
> > + return -rte_errno;
> > + dev_flow->dv.encap_verb =
> > + dev_flow->dv.actions[actions_n].action;
> > + flow->actions |= MLX5_ACTION_TUNNEL_ENCAP;
> > + actions_n++;
> > + break;
> > + case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP_L3:
> > + dev_flow->dv.actions[actions_n].type =
> > + MLX5DV_FLOW_ACTION_IBV_FLOW_ACTION;
> > + dev_flow->dv.actions[actions_n].action =
> > + mlx5_flow_dv_create_encap_l3(action, ctx, error);
> > + if (!(dev_flow->dv.actions[actions_n].action))
> > + return -rte_errno;
> > + dev_flow->dv.encap_verb =
> > + dev_flow->dv.actions[actions_n].action;
> > + flow->actions |= MLX5_ACTION_TUNNEL_ENCAP_L3;
> > + actions_n++;
> > + break;
> > default:
> > break;
> > }
> > dev_flow->dv.actions_n = actions_n;
> > + return 0;
> > }
> >
> > static uint32_t matcher_zero[MLX5_ST_SZ_DW(fte_match_param)] = { 0 };
> > @@ -1247,6 +1473,7 @@
> > };
> > void *match_value = dev_flow->dv.value.buf;
> > uint8_t inner = 0;
> > + int retval = 0;
> >
> > if (priority == MLX5_FLOW_PRIO_RSVD)
> > priority = priv->config.flow_prio - 1; @@ -1262,9 +1489,14
> @@
> > matcher.egress = attr->egress;
> > if (flow_dv_matcher_register(dev, &matcher, dev_flow, error))
> > return -rte_errno;
> > - for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++)
> > - flow_dv_create_action(actions, dev_flow);
> > - return 0;
> > + for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
> > + retval =
> > + flow_dv_create_action(actions, dev_flow, priv->ctx, error);
> > + if (retval)
> > + break;
>
> The following looks better matched?
>
> if (flow_dv_create_action(dev, actions, dev_flow, error))
> return -rte_errno;
>
> And leave 'return 0;' as is below.
OK.
>
> BTW, flow_dv_matcher_register() allocates mlx5_flow_dv_matcher or
> increase the refcnt. Then, if it fails here, doesn't it need to clean that up?
>
> > + }
> > +
>
> No blank line is allowed. Please fix other occurrences too.
Done.
>
> > + return retval;
> > }
> >
> > /**
> > @@ -1447,6 +1679,13 @@
> > LIST_REMOVE(dev_flow, next);
> > if (dev_flow->dv.matcher)
> > flow_dv_matcher_release(dev, dev_flow-
> >dv.matcher);
> > +
> > + if (dev_flow->dv.encap_verb) {
> > + claim_zero(mlx5_glue->destroy_flow_action
> > + (dev_flow->dv.encap_verb));
> > + dev_flow->dv.encap_verb = NULL;
> > + }
> > +
> > rte_free(dev_flow);
> > }
> > }
> > --
> > 1.8.3.1
> >
