diff options
| author | Catherine Sullivan <csully@google.com> | 2020-12-07 14:45:26 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-12-08 16:06:28 -0800 |
| commit | 6f007c6486d69967ac1d9e67df9ae9c77d49f1cc (patch) | |
| tree | fcaa4784b3e2541ffa6319c37a2040e4ae3265c3 /drivers/net/ethernet/google/gve/gve_desc.h | |
| parent | 02b0e0c18ba75227e0482600950c6abe71ace30f (diff) | |
gve: Add support for raw addressing in the tx path
During TX, skbs' data addresses are dma_map'ed and passed to the NIC.
This means that the device can perform DMA directly from these addresses
and the driver does not have to copy the buffer content into
pre-allocated buffers/qpls (as in qpl mode).
Reviewed-by: Yangchun Fu <yangchun@google.com>
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>
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_desc.h')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_desc.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_desc.h b/drivers/net/ethernet/google/gve/gve_desc.h index a1c0aaa60139..05ae6300e984 100644 --- a/drivers/net/ethernet/google/gve/gve_desc.h +++ b/drivers/net/ethernet/google/gve/gve_desc.h @@ -16,9 +16,11 @@ * Base addresses encoded in seg_addr are not assumed to be physical * addresses. The ring format assumes these come from some linear address * space. This could be physical memory, kernel virtual memory, user virtual - * memory. gVNIC uses lists of registered pages. Each queue is assumed - * to be associated with a single such linear address space to ensure a - * consistent meaning for seg_addrs posted to its rings. + * memory. + * If raw dma addressing is not supported then gVNIC uses lists of registered + * pages. Each queue is assumed to be associated with a single such linear + * address space to ensure a consistent meaning for seg_addrs posted to its + * rings. */ struct gve_tx_pkt_desc { |