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gve: Handle alternate miss completions

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The virtual NIC has 2 ways of indicating a miss-path
completion. This handles the alternate.

Signed-off-by: Jeroen de Borst <jeroendb@google.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jeroen de Borst 2022-11-17 08:27:01 -08:00 committed by David S. Miller
parent c2a0c3ed5b
commit a5affbd8a7
3 changed files with 21 additions and 8 deletions
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4
drivers/net/ethernet/google/gve/gve_adminq.h
View File

@ -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

5
drivers/net/ethernet/google/gve/gve_desc_dqo.h
View File

@ -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 */

20
drivers/net/ethernet/google/gve/gve_tx_dqo.c
View File

@ -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 =