diff options
| author | David Awogbemila <awogbemila@google.com> | 2021-10-24 11:42:37 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-10-25 14:13:12 +0100 |
| commit | 37149e9374bf7271563f7477ace9014ebc65a8af (patch) | |
| tree | 05877f2c1e56b83ed4c49a87aa2487897f11ee9c /drivers/net/ethernet/google/gve/gve_desc.h | |
| parent | 1344e751e91092ac0cb63b194621e59d2f364197 (diff) | |
gve: Implement packet continuation for RX.
This enables the driver to receive RX packets spread across multiple
buffers:
For a given multi-fragment packet the "packet continuation" bit is set
on all descriptors except the last one. These descriptors' payloads are
combined into a single SKB before the SKB is handed to the
networking stack.
This change adds a "packet buffer size" notion for RX queues. The
CreateRxQueue AdminQueue command sent to the device now includes the
packet_buffer_size.
We opt for a packet_buffer_size of PAGE_SIZE / 2 to give the
driver the opportunity to flip pages where we can instead of copying.
Signed-off-by: David Awogbemila <awogbemila@google.com>
Signed-off-by: Jeroen de Borst <jeroendb@google.com>
Reviewed-by: Catherine Sullivan <csully@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_desc.h')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_desc.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_desc.h b/drivers/net/ethernet/google/gve/gve_desc.h index 05ae6300e984..4d225a18d8ce 100644 --- a/drivers/net/ethernet/google/gve/gve_desc.h +++ b/drivers/net/ethernet/google/gve/gve_desc.h @@ -90,12 +90,13 @@ union gve_rx_data_slot { /* GVE Recive Packet Descriptor Flags */ #define GVE_RXFLG(x) cpu_to_be16(1 << (3 + (x))) -#define GVE_RXF_FRAG GVE_RXFLG(3) /* IP Fragment */ -#define GVE_RXF_IPV4 GVE_RXFLG(4) /* IPv4 */ -#define GVE_RXF_IPV6 GVE_RXFLG(5) /* IPv6 */ -#define GVE_RXF_TCP GVE_RXFLG(6) /* TCP Packet */ -#define GVE_RXF_UDP GVE_RXFLG(7) /* UDP Packet */ -#define GVE_RXF_ERR GVE_RXFLG(8) /* Packet Error Detected */ +#define GVE_RXF_FRAG GVE_RXFLG(3) /* IP Fragment */ +#define GVE_RXF_IPV4 GVE_RXFLG(4) /* IPv4 */ +#define GVE_RXF_IPV6 GVE_RXFLG(5) /* IPv6 */ +#define GVE_RXF_TCP GVE_RXFLG(6) /* TCP Packet */ +#define GVE_RXF_UDP GVE_RXFLG(7) /* UDP Packet */ +#define GVE_RXF_ERR GVE_RXFLG(8) /* Packet Error Detected */ +#define GVE_RXF_PKT_CONT GVE_RXFLG(10) /* Multi Fragment RX packet */ /* GVE IRQ */ #define GVE_IRQ_ACK BIT(31) |