linux.git/drivers/net/hyperv, branch v4.16-rc2

hv_netvsc: Use the num_online_cpus() for channel limit

2018-01-22T21:24:08+00:00

Since we no longer localize channel/CPU affiliation within one NUMA
node, num_online_cpus() is used as the number of channel cap, instead of
the number of processors in a NUMA node.

This patch allows a bigger range for tuning the number of channels.

Signed-off-by: Haiyang Zhang 
Signed-off-by: David S. Miller

hv_netvsc: empty current transmit aggregation if flow blocked

2017-12-13T20:57:39+00:00

If the transmit queue is known full, then don't keep aggregating
data. And the cp_partial flag which indicates that the current
aggregation buffer is full can be folded in to avoid more
conditionals.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: remove open_cnt reference count

2017-12-13T20:57:39+00:00

There is only ever a single instance of network device object
referencing the internal rndis object. Therefore the open_cnt atomic
is not necessary.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: pass netvsc_device to receive callback

2017-12-13T20:57:39+00:00

The netvsc_receive_callback function was using RCU to find the
appropriate underlying netvsc_device. Since calling function already
had that pointer, this was unnecessary.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: simplify function args in receive status path

2017-12-13T20:57:38+00:00

The caller (netvsc_receive) already has the net device pointer,
and should just pass that to functions rather than the hyperv device.
This eliminates several impossible error paths in the process.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: track memory allocation failures in ethtool stats

2017-12-13T20:57:38+00:00

When skb can not be allocated, update ethtool statisitics
rather than rx_dropped which is intended for netif_receive.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: copy_to_send buf can be void

2017-12-13T20:57:38+00:00

Since only caller does not care about return value.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: Fix the TX/RX buffer default sizes

2017-12-13T18:25:04+00:00

The values were not computed correctly. There are no significant
visible impact, though.

The intended size of RX buffer is 16 MB, and the default slot size is 1728.
So, NETVSC_DEFAULT_RX should be 16*1024*1024 / 1728 = 9709.

The intended size of TX buffer is 1 MB, and the slot size is 6144.
So, NETVSC_DEFAULT_TX should be 1024*1024 / 6144 = 170.

The patch puts the formula directly into the macro, and moves them to
hyperv_net.h, together with related macros.

Fixes: 5023a6db73196 ("netvsc: increase default receive buffer size")
Signed-off-by: Haiyang Zhang 
Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: Fix the receive buffer size limit

2017-12-13T18:25:04+00:00

The max should be 31 MB on host with NVSP version > 2.

On legacy hosts (NVSP version <=2) only 15 MB receive buffer is allowed,
otherwise the buffer request will be rejected by the host, resulting
vNIC not coming up.

The NVSP version is only available after negotiation. So, we add the
limit checking for legacy hosts in netvsc_init_buf().

Fixes: 5023a6db73196 ("netvsc: increase default receive buffer size")
Signed-off-by: Haiyang Zhang 
Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

hv_netvsc: optimize initialization of RNDIS header

2017-12-03T15:10:02+00:00

The memset of the whole maximum possible RNDIS header is unnecessary.
For the main part of the header use a structure assignment.

No need to memset the whole per packet info. Instead rely on caller to
set what it wants. Also get rid of cast to void and signed/unsigned
conversion. Now return pointer to per packet data (rather than the
header) which simplifies use by code setting up the packet data.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller