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f13697cc |
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22-Jan-2024 |
Shailend Chand <shailend@google.com> |
gve: Switch to config-aware queue allocation The new config-aware functions will help achieve the goal of being able to allocate resources for new queues while there already are active queues serving traffic. These new functions work off of arbitrary queue allocation configs rather than just the currently active config in priv, and they return the newly allocated resources instead of writing them into priv. Signed-off-by: Shailend Chand <shailend@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Jeroen de Borst <jeroendb@google.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20240122182632.1102721-4-shailend@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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1dfc2e46 |
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22-Jan-2024 |
Shailend Chand <shailend@google.com> |
gve: Refactor napi add and remove functions This change makes the napi poll functions non-static and moves the gve_(add|remove)_napi functions to gve_utils.c, to make possible future "start queue" hooks in the datapath files. Signed-off-by: Shailend Chand <shailend@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Jeroen de Borst <jeroendb@google.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20240122182632.1102721-3-shailend@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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18de1e51 |
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16-Nov-2023 |
Eric Dumazet <edumazet@google.com> |
gve: add gve_features_check() It is suboptimal to attempt skb linearization from ndo_start_xmit() if a gso skb has pathological layout, or if host stack does not have access to the payload (TCP direct). Linearization of large skbs can also fail under memory pressure. We should instead have an ndo_features_check() so that we can fallback to GSO, which is supported even for TCP direct, and generally much more efficient (no payload copy). Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Bailey Forrest <bcf@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Jeroen de Borst <jeroendb@google.com> Cc: Praveen Kaligineedi <pkaligineedi@google.com> Cc: Shailend Chand <shailend@google.com> Cc: Ziwei Xiao <ziweixiao@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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6081ac20 |
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15-Dec-2021 |
Tao Liu <xliutaox@google.com> |
gve: Add tx|rx-coalesce-usec for DQO Adding ethtool support for changing rx-coalesce-usec and tx-coalesce-usec when using the DQO queue format. Signed-off-by: Tao Liu <xliutaox@google.com> Signed-off-by: Jeroen de Borst <jeroendb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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d30baacc |
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15-Dec-2021 |
Catherine Sullivan <csully@google.com> |
gve: Move the irq db indexes out of the ntfy block struct Giving the device access to other kernel structs is not ideal. Move the indexes into their own array and just keep pointers to them in the ntfy block struct. Signed-off-by: Catherine Sullivan <csully@google.com> Signed-off-by: David Awogbemila <awogbemila@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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a57e5de4 |
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24-Jun-2021 |
Bailey Forrest <bcf@google.com> |
gve: DQO: Add TX path TX SKBs will have their buffers DMA mapped with the device. Each buffer will have at least one TX descriptor associated. Each SKB will also have a metadata descriptor. Each TX queue maintains an array of `gve_tx_pending_packet_dqo` objects. Every TX SKB will have an associated pending_packet object. A TX SKB's descriptors will use its pending_packet's index as the completion tag, which will be returned on the TX completion queue. The device implements a "flow-miss model". Most packets will simply receive a packet completion. The flow-miss system may choose to process a packet based on its contents. A TX packet which experiences a flow miss would receive a miss completion followed by a later reinjection completion. The miss-completion is received when the packet starts to be processed by the flow-miss system and the reinjection completion is received when the flow-miss system completes processing the packet and sends it on the wire. Notable mentions: - Buffers may be freed after receiving the miss-completion, but in order to avoid packet reordering, we do not complete the SKB until receiving the reinjection completion. - The driver must robustly handle the unlikely scenario where a miss completion does not have an associated reinjection completion. This is accomplished by maintaining a list of packets which have a pending reinjection completion. After a short timeout (5 seconds), the SKB and buffers are released and the pending_packet is moved to a second list which has a longer timeout (60 seconds), where the pending_packet will not be reused. When the longer timeout elapses, the driver may assume the reinjection completion would never be received and the pending_packet may be reused. - Completion handling is triggered by an interrupt and is done in the NAPI poll function. Because the TX path and completion exist in different threading contexts they maintain their own lists for free pending_packet objects. The TX path uses a lock-free approach to steal the list from the completion path. - Both the TSO context and general context descriptors have metadata bytes. The device requires that if multiple descriptors contain the same field, each descriptor must have the same value set for that field. Signed-off-by: Bailey Forrest <bcf@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Catherine Sullivan <csully@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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0dcc144a |
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24-Jun-2021 |
Bailey Forrest <bcf@google.com> |
gve: DQO: Configure interrupts on device up When interrupts are first enabled, we also set the ratelimits, which will be static for the entire usage of the device. Signed-off-by: Bailey Forrest <bcf@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Catherine Sullivan <csully@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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9c1a59a2 |
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24-Jun-2021 |
Bailey Forrest <bcf@google.com> |
gve: DQO: Add ring allocation and initialization Allocate the buffer and completion ring structures. Do not populate the rings yet. That will happen in the respective rx and tx datapath follow-on patches Signed-off-by: Bailey Forrest <bcf@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Catherine Sullivan <csully@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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5e8c5adf |
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24-Jun-2021 |
Bailey Forrest <bcf@google.com> |
gve: DQO: Add core netdev features Add napi netdev device registration, interrupt handling and initial tx and rx polling stubs. The stubs will be filled in follow-on patches. Also: - LRO feature advertisement and handling - Also update ethtool logic Signed-off-by: Bailey Forrest <bcf@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Catherine Sullivan <csully@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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