diff options
| author | David Awogbemila <awogbemila@google.com> | 2020-12-07 14:45:25 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-12-08 16:06:28 -0800 |
| commit | 02b0e0c18ba75227e0482600950c6abe71ace30f (patch) | |
| tree | 2e6efbc3e56f16737577634b52ea2ccddb6566a5 /drivers/net/ethernet/google/gve/gve.h | |
| parent | ede3fcf5ec67f717e297f060ad00b524a074c4e0 (diff) | |
gve: Rx Buffer Recycling
This patch lets the driver reuse buffers that have been freed by the
networking stack.
In the raw addressing case, this allows the driver avoid allocating new
buffers.
In the qpl case, the driver can avoid copies.
This patch separates the page refcount tracking mechanism
into a function gve_rx_can_recycle_buffer which uses get_page - this will
be changed in a future patch to entirely eliminate the use of get_page in
tracking page refcounts.
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.h')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve.h | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index d8bba0ba34e3..8aad4af2aa2b 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -52,6 +52,7 @@ struct gve_rx_slot_page_info { struct page *page; void *page_address; u8 page_offset; /* flipped to second half? */ + u8 can_flip; }; /* A list of pages registered with the device during setup and used by a queue @@ -502,15 +503,6 @@ static inline enum dma_data_direction gve_qpl_dma_dir(struct gve_priv *priv, return DMA_FROM_DEVICE; } -/* Returns true if the max mtu allows page recycling */ -static inline bool gve_can_recycle_pages(struct net_device *dev) -{ - /* We can't recycle the pages if we can't fit a packet into half a - * page. - */ - return dev->max_mtu <= PAGE_SIZE / 2; -} - /* buffers */ int gve_alloc_page(struct gve_priv *priv, struct device *dev, struct page **page, dma_addr_t *dma, |