[PATCH net-next v4 02/15] gve: refactor initialization with helper functions
From: Harshitha Ramamurthy <hramamurthy@google.com>
Date: 2026-08-14 02:14:10
Also in:
bpf, lkml
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
In the interest of commonizing code, refactor gve_probe() and gve_init_priv() with a few helper functions that can be expanded and utilized in upcoming patches that add the mailbox ABI to the driver. The helper functions are: - gve_set_num_ntfy_blks() - gve_set_num_queues() Reorder code to combine lines that accomplish a similar objective like setting defaults. Move setting HW-GRO and UDP GSO support out of an Adminq method into gve_init_priv(). These changes are just code movement, no functional change. Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Jordan Rhee <redacted> Signed-off-by: Harshitha Ramamurthy <hramamurthy@google.com> --- v4: - move the new functions to gve_adminq.c since that will be their final home in the following patches (Przemek Kitszel) v2: - ensure to call verify driver compatibility in reset path drivers/net/ethernet/google/gve/gve_adminq.c | 49 ++++++++++++++--- drivers/net/ethernet/google/gve/gve_adminq.h | 2 + drivers/net/ethernet/google/gve/gve_main.c | 58 +++++++------------- 3 files changed, 62 insertions(+), 47 deletions(-)
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c
index 70ffed8b52c3..fe0dedfb25d7 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.c
+++ b/drivers/net/ethernet/google/gve/gve_adminq.c@@ -1117,14 +1117,6 @@ int gve_adminq_describe_device(struct gve_priv *priv) gve_set_default_rss_sizes(priv); - /* DQO supports HW-GRO and UDP_GSO */ - if (gve_is_dqo(priv)) { - u64 additional_features = NETIF_F_GRO_HW | NETIF_F_GSO_UDP_L4; - - priv->dev->hw_features |= additional_features; - priv->dev->features |= additional_features; - } - priv->max_registered_pages = be64_to_cpu(descriptor->max_registered_pages); mtu = be16_to_cpu(descriptor->mtu);
@@ -1600,3 +1592,44 @@ int gve_adminq_query_rss_config(struct gve_priv *priv, struct ethtool_rxfh_param dma_pool_free(priv->adminq_pool, descriptor, descriptor_bus); return err; } + +int gve_set_num_ntfy_blks(struct gve_priv *priv) +{ + int num_ntfy; + + num_ntfy = pci_msix_vec_count(priv->pdev); + if (num_ntfy <= 0) { + dev_err(&priv->pdev->dev, + "could not count MSI-x vectors: err=%d\n", num_ntfy); + return num_ntfy; + } else if (num_ntfy < GVE_MIN_MSIX) { + dev_err(&priv->pdev->dev, "gve needs at least %d MSI-x vectors, but only has %d\n", + GVE_MIN_MSIX, num_ntfy); + return -EINVAL; + } + + /* gvnic has one Notification Block per MSI-x vector, except for the + * management vector + */ + priv->num_ntfy_blks = (num_ntfy - 1) & ~0x1; + priv->mgmt_msix_idx = priv->num_ntfy_blks; + + return 0; +} + +void gve_set_num_queues(struct gve_priv *priv) +{ + priv->tx_cfg.max_queues = + min_t(int, priv->tx_cfg.max_queues, priv->num_ntfy_blks / 2); + priv->rx_cfg.max_queues = + min_t(int, priv->rx_cfg.max_queues, priv->num_ntfy_blks / 2); + + priv->tx_cfg.num_queues = priv->tx_cfg.max_queues; + priv->rx_cfg.num_queues = priv->rx_cfg.max_queues; + if (priv->default_num_queues > 0) { + priv->tx_cfg.num_queues = min_t(int, priv->default_num_queues, + priv->tx_cfg.num_queues); + priv->rx_cfg.num_queues = min_t(int, priv->default_num_queues, + priv->rx_cfg.num_queues); + } +}
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h
index 8e80f36116ec..82b52424a63f 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.h
+++ b/drivers/net/ethernet/google/gve/gve_adminq.h@@ -656,5 +656,7 @@ int gve_adminq_report_nic_ts(struct gve_priv *priv, struct gve_ptype_lut; int gve_adminq_get_ptype_map_dqo(struct gve_priv *priv, struct gve_ptype_lut *ptype_lut); +int gve_set_num_ntfy_blks(struct gve_priv *priv); +void gve_set_num_queues(struct gve_priv *priv); #endif /* _GVE_ADMINQ_H */
diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index 30bf6df4ebc5..37e6205e2eef 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c@@ -2400,7 +2400,6 @@ static const struct xdp_metadata_ops gve_xdp_metadata_ops = { static int gve_init_priv(struct gve_priv *priv, bool skip_describe_device) { - int num_ntfy; int err; /* Set up the adminq */
@@ -2431,57 +2430,38 @@ static int gve_init_priv(struct gve_priv *priv, bool skip_describe_device) "Could not get device information: err=%d\n", err); goto err; } - priv->dev->mtu = priv->dev->max_mtu; - num_ntfy = pci_msix_vec_count(priv->pdev); - if (num_ntfy <= 0) { + + err = gve_set_num_ntfy_blks(priv); + if (err) { dev_err(&priv->pdev->dev, - "could not count MSI-x vectors: err=%d\n", num_ntfy); - err = num_ntfy; + "Could not setup notify blocks: err=%d\n", err); goto err; - } else if (num_ntfy < GVE_MIN_MSIX) { - dev_err(&priv->pdev->dev, "gve needs at least %d MSI-x vectors, but only has %d\n", - GVE_MIN_MSIX, num_ntfy); - err = -EINVAL; - goto err; - } - - /* Big TCP is only supported on DQO */ - if (!gve_is_gqi(priv)) - netif_set_tso_max_size(priv->dev, GVE_DQO_TX_MAX); - - priv->rx_copybreak = GVE_DEFAULT_RX_COPYBREAK; - /* gvnic has one Notification Block per MSI-x vector, except for the - * management vector - */ - priv->num_ntfy_blks = (num_ntfy - 1) & ~0x1; - priv->mgmt_msix_idx = priv->num_ntfy_blks; - priv->numa_node = dev_to_node(&priv->pdev->dev); - - priv->tx_cfg.max_queues = - min_t(int, priv->tx_cfg.max_queues, priv->num_ntfy_blks / 2); - priv->rx_cfg.max_queues = - min_t(int, priv->rx_cfg.max_queues, priv->num_ntfy_blks / 2); - - priv->tx_cfg.num_queues = priv->tx_cfg.max_queues; - priv->rx_cfg.num_queues = priv->rx_cfg.max_queues; - if (priv->default_num_queues > 0) { - priv->tx_cfg.num_queues = min_t(int, priv->default_num_queues, - priv->tx_cfg.num_queues); - priv->rx_cfg.num_queues = min_t(int, priv->default_num_queues, - priv->rx_cfg.num_queues); } - priv->tx_cfg.num_xdp_queues = 0; + gve_set_num_queues(priv); dev_info(&priv->pdev->dev, "TX queues %d, RX queues %d\n", priv->tx_cfg.num_queues, priv->rx_cfg.num_queues); dev_info(&priv->pdev->dev, "Max TX queues %d, Max RX queues %d\n", priv->tx_cfg.max_queues, priv->rx_cfg.max_queues); - if (!gve_is_gqi(priv)) { + if (gve_is_dqo(priv)) { + /* DQO supports HW-GRO and UDP_GSO */ + u64 additional_features = NETIF_F_GRO_HW | NETIF_F_GSO_UDP_L4; + + priv->dev->hw_features |= additional_features; + priv->dev->features |= additional_features; + priv->tx_coalesce_usecs = GVE_TX_IRQ_RATELIMIT_US_DQO; priv->rx_coalesce_usecs = GVE_RX_IRQ_RATELIMIT_US_DQO; + + /* Big TCP is only supported on DQO */ + netif_set_tso_max_size(priv->dev, GVE_DQO_TX_MAX); } + priv->dev->mtu = priv->dev->max_mtu; + priv->numa_node = dev_to_node(&priv->pdev->dev); + priv->tx_cfg.num_xdp_queues = 0; + priv->rx_copybreak = GVE_DEFAULT_RX_COPYBREAK; priv->ts_config.tx_type = HWTSTAMP_TX_OFF; priv->ts_config.rx_filter = HWTSTAMP_FILTER_NONE;
--
2.55.0.691.gc56d675ccc-goog