From a5affbd8a73eb0a62378767f9d44527738213c07 Mon Sep 17 00:00:00 2001 From: Jeroen de Borst Date: Thu, 17 Nov 2022 08:27:01 -0800 Subject: [PATCH] gve: Handle alternate miss completions The virtual NIC has 2 ways of indicating a miss-path completion. This handles the alternate. Signed-off-by: Jeroen de Borst Reviewed-by: Jesse Brandeburg Signed-off-by: David S. Miller --- drivers/net/ethernet/google/gve/gve_adminq.h | 4 +++- drivers/net/ethernet/google/gve/gve_desc_dqo.h | 5 +++++ drivers/net/ethernet/google/gve/gve_tx_dqo.c | 20 +++++++++++++------- 3 files changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h index b9ee8be..cf29662 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -154,6 +154,7 @@ enum gve_driver_capbility { gve_driver_capability_gqi_rda = 1, gve_driver_capability_dqo_qpl = 2, /* reserved for future use */ gve_driver_capability_dqo_rda = 3, + gve_driver_capability_alt_miss_compl = 4, }; #define GVE_CAP1(a) BIT((int)a) @@ -164,7 +165,8 @@ enum gve_driver_capbility { #define GVE_DRIVER_CAPABILITY_FLAGS1 \ (GVE_CAP1(gve_driver_capability_gqi_qpl) | \ GVE_CAP1(gve_driver_capability_gqi_rda) | \ - GVE_CAP1(gve_driver_capability_dqo_rda)) + GVE_CAP1(gve_driver_capability_dqo_rda) | \ + GVE_CAP1(gve_driver_capability_alt_miss_compl)) #define GVE_DRIVER_CAPABILITY_FLAGS2 0x0 #define GVE_DRIVER_CAPABILITY_FLAGS3 0x0 diff --git a/drivers/net/ethernet/google/gve/gve_desc_dqo.h b/drivers/net/ethernet/google/gve/gve_desc_dqo.h index e8fe9ad..f79cd05 100644 --- a/drivers/net/ethernet/google/gve/gve_desc_dqo.h +++ b/drivers/net/ethernet/google/gve/gve_desc_dqo.h @@ -176,6 +176,11 @@ static_assert(sizeof(struct gve_tx_compl_desc) == 8); #define GVE_COMPL_TYPE_DQO_MISS 0x1 /* Miss path completion */ #define GVE_COMPL_TYPE_DQO_REINJECTION 0x3 /* Re-injection completion */ +/* The most significant bit in the completion tag can change the completion + * type from packet completion to miss path completion. + */ +#define GVE_ALT_MISS_COMPL_BIT BIT(15) + /* Descriptor to post buffers to HW on buffer queue. */ struct gve_rx_desc_dqo { __le16 buf_id; /* ID returned in Rx completion descriptor */ diff --git a/drivers/net/ethernet/google/gve/gve_tx_dqo.c b/drivers/net/ethernet/google/gve/gve_tx_dqo.c index 588d648..b76143b 100644 --- a/drivers/net/ethernet/google/gve/gve_tx_dqo.c +++ b/drivers/net/ethernet/google/gve/gve_tx_dqo.c @@ -953,12 +953,18 @@ int gve_clean_tx_done_dqo(struct gve_priv *priv, struct gve_tx_ring *tx, atomic_set_release(&tx->dqo_compl.hw_tx_head, tx_head); } else if (type == GVE_COMPL_TYPE_DQO_PKT) { u16 compl_tag = le16_to_cpu(compl_desc->completion_tag); - - gve_handle_packet_completion(priv, tx, !!napi, - compl_tag, - &pkt_compl_bytes, - &pkt_compl_pkts, - /*is_reinjection=*/false); + if (compl_tag & GVE_ALT_MISS_COMPL_BIT) { + compl_tag &= ~GVE_ALT_MISS_COMPL_BIT; + gve_handle_miss_completion(priv, tx, compl_tag, + &miss_compl_bytes, + &miss_compl_pkts); + } else { + gve_handle_packet_completion(priv, tx, !!napi, + compl_tag, + &pkt_compl_bytes, + &pkt_compl_pkts, + false); + } } else if (type == GVE_COMPL_TYPE_DQO_MISS) { u16 compl_tag = le16_to_cpu(compl_desc->completion_tag); @@ -972,7 +978,7 @@ int gve_clean_tx_done_dqo(struct gve_priv *priv, struct gve_tx_ring *tx, compl_tag, &reinject_compl_bytes, &reinject_compl_pkts, - /*is_reinjection=*/true); + true); } tx->dqo_compl.head = -- 2.7.4