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Date: Thu, 9 May 2024 17:18:13 -0700
From: Ziwei Xiao <ziweixiao@...gle.com>
To: David Wei <dw@...idwei.uk>
Cc: netdev@...r.kernel.org, jeroendb@...gle.com, pkaligineedi@...gle.com,
shailend@...gle.com, davem@...emloft.net, edumazet@...gle.com,
kuba@...nel.org, pabeni@...hat.com, willemb@...gle.com,
hramamurthy@...gle.com, rushilg@...gle.com, jfraker@...gle.com,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 3/5] gve: Add flow steering device option
On Tue, May 7, 2024 at 10:33 PM David Wei <dw@...idwei.uk> wrote:
>
> On 2024-05-07 15:59, Ziwei Xiao wrote:
> > From: Jeroen de Borst <jeroendb@...gle.com>
> >
> > Add a new device option to signal to the driver that the device supports
> > flow steering. This device option also carries the maximum number of
> > flow steering rules that the device can store.
> >
> > Signed-off-by: Jeroen de Borst <jeroendb@...gle.com>
> > Co-developed-by: Ziwei Xiao <ziweixiao@...gle.com>
> > Signed-off-by: Ziwei Xiao <ziweixiao@...gle.com>
> > Reviewed-by: Praveen Kaligineedi <pkaligineedi@...gle.com>
> > Reviewed-by: Harshitha Ramamurthy <hramamurthy@...gle.com>
> > Reviewed-by: Willem de Bruijn <willemb@...gle.com>
> > ---
> > drivers/net/ethernet/google/gve/gve.h | 2 +
> > drivers/net/ethernet/google/gve/gve_adminq.c | 42 ++++++++++++++++++--
> > drivers/net/ethernet/google/gve/gve_adminq.h | 11 +++++
> > 3 files changed, 51 insertions(+), 4 deletions(-)
>
> Think something went wrong here. The title is different but patch is
> same as 2/5.
This is the patch for adding the device option(3/5), while the
previous patch you commented is actually for adding extended
adminq(2/5). I don't see any wrong with these two patches. Maybe it's
replying in the wrong thread?
>
> >
> > diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h
> > index ca7fce17f2c0..58213c15e084 100644
> > --- a/drivers/net/ethernet/google/gve/gve.h
> > +++ b/drivers/net/ethernet/google/gve/gve.h
> > @@ -786,6 +786,8 @@ struct gve_priv {
> >
> > u16 header_buf_size; /* device configured, header-split supported if non-zero */
> > bool header_split_enabled; /* True if the header split is enabled by the user */
> > +
> > + u32 max_flow_rules;
> > };
> >
> > enum gve_service_task_flags_bit {
> > diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c
> > index 514641b3ccc7..85d0d742ad21 100644
> > --- a/drivers/net/ethernet/google/gve/gve_adminq.c
> > +++ b/drivers/net/ethernet/google/gve/gve_adminq.c
> > @@ -44,6 +44,7 @@ void gve_parse_device_option(struct gve_priv *priv,
> > struct gve_device_option_jumbo_frames **dev_op_jumbo_frames,
> > struct gve_device_option_dqo_qpl **dev_op_dqo_qpl,
> > struct gve_device_option_buffer_sizes **dev_op_buffer_sizes,
> > + struct gve_device_option_flow_steering **dev_op_flow_steering,
> > struct gve_device_option_modify_ring **dev_op_modify_ring)
> > {
> > u32 req_feat_mask = be32_to_cpu(option->required_features_mask);
> > @@ -189,6 +190,23 @@ void gve_parse_device_option(struct gve_priv *priv,
> > if (option_length == GVE_DEVICE_OPTION_NO_MIN_RING_SIZE)
> > priv->default_min_ring_size = true;
> > break;
> > + case GVE_DEV_OPT_ID_FLOW_STEERING:
> > + if (option_length < sizeof(**dev_op_flow_steering) ||
> > + req_feat_mask != GVE_DEV_OPT_REQ_FEAT_MASK_FLOW_STEERING) {
> > + dev_warn(&priv->pdev->dev, GVE_DEVICE_OPTION_ERROR_FMT,
> > + "Flow Steering",
> > + (int)sizeof(**dev_op_flow_steering),
> > + GVE_DEV_OPT_REQ_FEAT_MASK_FLOW_STEERING,
> > + option_length, req_feat_mask);
> > + break;
> > + }
> > +
> > + if (option_length > sizeof(**dev_op_flow_steering))
> > + dev_warn(&priv->pdev->dev,
> > + GVE_DEVICE_OPTION_TOO_BIG_FMT,
> > + "Flow Steering");
> > + *dev_op_flow_steering = (void *)(option + 1);
> > + break;
> > default:
> > /* If we don't recognize the option just continue
> > * without doing anything.
> > @@ -208,6 +226,7 @@ gve_process_device_options(struct gve_priv *priv,
> > struct gve_device_option_jumbo_frames **dev_op_jumbo_frames,
> > struct gve_device_option_dqo_qpl **dev_op_dqo_qpl,
> > struct gve_device_option_buffer_sizes **dev_op_buffer_sizes,
> > + struct gve_device_option_flow_steering **dev_op_flow_steering,
> > struct gve_device_option_modify_ring **dev_op_modify_ring)
> > {
> > const int num_options = be16_to_cpu(descriptor->num_device_options);
> > @@ -230,7 +249,7 @@ gve_process_device_options(struct gve_priv *priv,
> > dev_op_gqi_rda, dev_op_gqi_qpl,
> > dev_op_dqo_rda, dev_op_jumbo_frames,
> > dev_op_dqo_qpl, dev_op_buffer_sizes,
> > - dev_op_modify_ring);
> > + dev_op_flow_steering, dev_op_modify_ring);
> > dev_opt = next_opt;
> > }
> >
> > @@ -838,6 +857,8 @@ static void gve_enable_supported_features(struct gve_priv *priv,
> > *dev_op_dqo_qpl,
> > const struct gve_device_option_buffer_sizes
> > *dev_op_buffer_sizes,
> > + const struct gve_device_option_flow_steering
> > + *dev_op_flow_steering,
> > const struct gve_device_option_modify_ring
> > *dev_op_modify_ring)
> > {
> > @@ -890,10 +911,22 @@ static void gve_enable_supported_features(struct gve_priv *priv,
> > priv->min_tx_desc_cnt = be16_to_cpu(dev_op_modify_ring->min_tx_ring_size);
> > }
> > }
> > +
> > + if (dev_op_flow_steering &&
> > + (supported_features_mask & GVE_SUP_FLOW_STEERING_MASK)) {
> > + if (dev_op_flow_steering->max_flow_rules) {
> > + priv->max_flow_rules =
> > + be32_to_cpu(dev_op_flow_steering->max_flow_rules);
> > + dev_info(&priv->pdev->dev,
> > + "FLOW STEERING device option enabled with max rule limit of %u.\n",
> > + priv->max_flow_rules);
> > + }
> > + }
> > }
> >
> > int gve_adminq_describe_device(struct gve_priv *priv)
> > {
> > + struct gve_device_option_flow_steering *dev_op_flow_steering = NULL;
> > struct gve_device_option_buffer_sizes *dev_op_buffer_sizes = NULL;
> > struct gve_device_option_jumbo_frames *dev_op_jumbo_frames = NULL;
> > struct gve_device_option_modify_ring *dev_op_modify_ring = NULL;
> > @@ -930,6 +963,7 @@ int gve_adminq_describe_device(struct gve_priv *priv)
> > &dev_op_gqi_qpl, &dev_op_dqo_rda,
> > &dev_op_jumbo_frames, &dev_op_dqo_qpl,
> > &dev_op_buffer_sizes,
> > + &dev_op_flow_steering,
> > &dev_op_modify_ring);
> > if (err)
> > goto free_device_descriptor;
> > @@ -969,9 +1003,8 @@ int gve_adminq_describe_device(struct gve_priv *priv)
> > /* set default descriptor counts */
> > gve_set_default_desc_cnt(priv, descriptor);
> >
> > - /* DQO supports LRO. */
> > if (!gve_is_gqi(priv))
> > - priv->dev->hw_features |= NETIF_F_LRO;
> > + priv->dev->hw_features |= NETIF_F_LRO | NETIF_F_NTUPLE;
> >
> > priv->max_registered_pages =
> > be64_to_cpu(descriptor->max_registered_pages);
> > @@ -991,7 +1024,8 @@ int gve_adminq_describe_device(struct gve_priv *priv)
> >
> > gve_enable_supported_features(priv, supported_features_mask,
> > dev_op_jumbo_frames, dev_op_dqo_qpl,
> > - dev_op_buffer_sizes, dev_op_modify_ring);
> > + dev_op_buffer_sizes, dev_op_flow_steering,
> > + dev_op_modify_ring);
> >
> > free_device_descriptor:
> > dma_pool_free(priv->adminq_pool, descriptor, descriptor_bus);
> > diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h
> > index e0370ace8397..e64a0e72e781 100644
> > --- a/drivers/net/ethernet/google/gve/gve_adminq.h
> > +++ b/drivers/net/ethernet/google/gve/gve_adminq.h
> > @@ -146,6 +146,14 @@ struct gve_device_option_modify_ring {
> >
> > static_assert(sizeof(struct gve_device_option_modify_ring) == 12);
> >
> > +struct gve_device_option_flow_steering {
> > + __be32 supported_features_mask;
> > + __be32 reserved;
> > + __be32 max_flow_rules;
> > +};
> > +
> > +static_assert(sizeof(struct gve_device_option_flow_steering) == 12);
> > +
> > /* Terminology:
> > *
> > * RDA - Raw DMA Addressing - Buffers associated with SKBs are directly DMA
> > @@ -163,6 +171,7 @@ enum gve_dev_opt_id {
> > GVE_DEV_OPT_ID_DQO_QPL = 0x7,
> > GVE_DEV_OPT_ID_JUMBO_FRAMES = 0x8,
> > GVE_DEV_OPT_ID_BUFFER_SIZES = 0xa,
> > + GVE_DEV_OPT_ID_FLOW_STEERING = 0xb,
> > };
> >
> > enum gve_dev_opt_req_feat_mask {
> > @@ -174,12 +183,14 @@ enum gve_dev_opt_req_feat_mask {
> > GVE_DEV_OPT_REQ_FEAT_MASK_DQO_QPL = 0x0,
> > GVE_DEV_OPT_REQ_FEAT_MASK_BUFFER_SIZES = 0x0,
> > GVE_DEV_OPT_REQ_FEAT_MASK_MODIFY_RING = 0x0,
> > + GVE_DEV_OPT_REQ_FEAT_MASK_FLOW_STEERING = 0x0,
> > };
> >
> > enum gve_sup_feature_mask {
> > GVE_SUP_MODIFY_RING_MASK = 1 << 0,
> > GVE_SUP_JUMBO_FRAMES_MASK = 1 << 2,
> > GVE_SUP_BUFFER_SIZES_MASK = 1 << 4,
> > + GVE_SUP_FLOW_STEERING_MASK = 1 << 5,
> > };
> >
> > #define GVE_DEV_OPT_LEN_GQI_RAW_ADDRESSING 0x0
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