linux.git/drivers/net/ethernet/google, branch v5.12

gve: Add support for raw addressing in the tx path

2020-12-09T00:06:28+00:00

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 
Signed-off-by: Catherine Sullivan 
Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller

gve: Rx Buffer Recycling

2020-12-09T00:06:28+00:00

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 
Signed-off-by: David S. Miller

gve: Add support for raw addressing to the rx path

2020-12-09T00:06:28+00:00

Add support to use raw dma addresses in the rx path. Due to this new
support we can alloc a new buffer instead of making a copy.

RX buffers are handed to the networking stack and are
re-allocated as needed, avoiding the need to use
skb_copy_to_linear_data() as in "qpl" mode.

Reviewed-by: Yangchun Fu 
Signed-off-by: Catherine Sullivan 
Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller

gve: Add support for raw addressing device option

2020-12-09T00:06:28+00:00

Add support to describe device for parsing device options. As
the first device option, add raw addressing.

"Raw Addressing" mode (as opposed to the current "qpl" mode) is an
operational mode which allows the driver avoid bounce buffer copies
which it currently performs using pre-allocated qpls (queue_page_lists)
when sending and receiving packets.
For egress packets, the provided skb data addresses will be dma_map'ed and
passed to the device, allowing the NIC can perform DMA directly - the
driver will not have to copy the buffer content into pre-allocated
buffers/qpls (as in qpl mode).
For ingress packets, copies are also eliminated as buffers are handed to
the networking stack and then recycled or re-allocated as
necessary, avoiding the use of skb_copy_to_linear_data().

This patch only introduces the option to the driver.
Subsequent patches will add the ingress and egress functionality.

Reviewed-by: Yangchun Fu 
Signed-off-by: Catherine Sullivan 
Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller

net: don't include ethtool.h from netdevice.h

2020-11-24T01:27:04+00:00

linux/netdevice.h is included in very many places, touching any
of its dependecies causes large incremental builds.

Drop the linux/ethtool.h include, linux/netdevice.h just needs
a forward declaration of struct ethtool_ops.

Fix all the places which made use of this implicit include.

Acked-by: Johannes Berg 
Acked-by: Shannon Nelson 
Reviewed-by: Jesse Brandeburg 
Link: https://lore.kernel.org/r/20201120225052.1427503-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski

gve: Replace zero-length array with flexible-array member

2020-10-30T21:57:41+00:00

There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure.  Kernel code
should always use “flexible array members”[1] for these cases.  The
older style of one-element or zero-length arrays should no longer be
used[2].

Refactor the code according to the use of a flexible-array member in
struct gve_stats_report, instead of a zero-length array, and use the
struct_size() helper to calculate the size for the resource allocation.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays

Signed-off-by: Gustavo A. R. Silva

gve: Enable Link Speed Reporting in the driver.

2020-09-11T21:31:54+00:00

This change allows the driver to report the device link speed
when the ethtool command:
	ethtool 
is run.
Getting the link speed is done via a new admin queue command:
ReportLinkSpeed.

Reviewed-by: Yangchun Fu 
Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller

gve: Use link status register to report link status

2020-09-11T21:31:54+00:00

This makes the driver better aware of the connectivity status of the
device. Based on the device's status register, the driver can call
netif_carrier_{on,off}.

Reviewed-by: Yangchun Fu 
Signed-off-by: Patricio Noyola 
Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller

gve: Batch AQ commands for creating and destroying queues.

2020-09-11T21:31:54+00:00

Adds support for batching AQ commands and uses it for creating and
destroying queues.

Reviewed-by: Yangchun Fu 
Signed-off-by: Sagi Shahar 
Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller

gve: NIC stats for report-stats and for ethtool

2020-09-11T21:31:54+00:00

This adds per queue NIC stats to ethtool stats and to report-stats.
These stats are always exposed to guest whether or not the
report-stats flag is turned on.

Signed-off-by: David Awogbemila 
Signed-off-by: David S. Miller