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  1. 08 Jan, 2017 4 commits
    • Grygorii Strashko's avatar
      net: ethernet: ti: cpdma: use devm_ioremap · 7f3b490a
      Grygorii Strashko authored 
      Use devm_ioremap() and simplify the code.
Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7f3b490a
    • Grygorii Strashko's avatar
      net: ethernet: ti: cpdma: minimize number of parameters in cpdma_desc_pool_create/destroy() · 5fcc40a9
      Grygorii Strashko authored 
      Update cpdma_desc_pool_create/destroy() to accept only one parameter
struct cpdma_ctlr*, as this structure contains all required
information for pool creation/destruction.
Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5fcc40a9
    • Grygorii Strashko's avatar
      net: ethernet: ti: cpdma: fix desc re-queuing · 12a303e3
      Grygorii Strashko authored 
      The currently processing cpdma descriptor with EOQ flag set may
contain two values in Next Descriptor Pointer field:
- valid pointer: means CPDMA missed addition of new desc in queue;
- null: no more descriptors in queue.
In the later case, it's not required to write to HDP register, but now
CPDMA does it.

Hence, add additional check for Next Descriptor Pointer != null in
cpdma_chan_process() function before writing in HDP register.
Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      12a303e3
    • Grygorii Strashko's avatar
      net: ethernet: ti: cpdma: am437x: allow descs to be plased in ddr · a6c83ccf
      Grygorii Strashko authored 
      It's observed that cpsw/cpdma is not working properly when CPPI
descriptors are placed in DDR instead of internal CPPI RAM on am437x
SoC:
- rx/tx silently stops processing packets;
- or - after boot it's working for sometime, but stuck once Network
load is increased (ping is working, but iperf is not).
(The same issue has not been reproduced on am335x and am57xx).

It seems that write to HDP register processed faster by interconnect
than writing of descriptor memory buffer in DDR, which is probably
caused by store buffer / write buffer differences as these functions
are implemented differently across devices. So, to fix this i come up
with two minimal, required changes:

1) all accesses to the channel register HDP/CP/RXFREE registers should
be done using sync IO accessors readl()/writel(), because all previous
memory writes writes have to be completed before starting channel
(write to HDP) or completing desc processing.

2) the change 1 only doesn't work on am437x and additional reading of
desc's field is required right after the new descriptor was filled
with data and before pointer on it will be stored in
prev_desc->hw_next field or HDP register.

In addition, to above changes this patch eliminates all relaxed ordering
I/O accessors in this driver as suggested by David Miller to avoid such
kind of issues in the future, but with one exception - relaxed IO accessors
will still be used to fill desc in cpdma_chan_submit(), which is safe as
there is read barrier at the end of write sequence, and because sync IO
accessors usage here will affect on net performance.
Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a6c83ccf
  3. 07 Jan, 2017 9 commits
  5. 06 Jan, 2017 23 commits
  7. 05 Jan, 2017 4 commits
    • Sowmini Varadhan's avatar
      tools: psock_tpacket: block Rx until socket filter has been added and socket... · c1878f7a
      Sowmini Varadhan authored 
      tools: psock_tpacket: block Rx until socket filter has been added and socket has been bound to loopback.

Packets from any/all interfaces may be queued up on the PF_PACKET socket
before it is bound to the loopback interface by psock_tpacket, and
when these are passed up by the kernel, they could interfere
with the Rx tests.

Avoid interference from spurious packet by blocking Rx until the
socket filter has been set up, and the packet has been bound to the
desired (lo) interface. The effective sequence is
	socket(PF_PACKET, SOCK_RAW, 0);
	set up ring
	Invoke SO_ATTACH_FILTER
	bind to sll_protocol set to ETH_P_ALL, sll_ifindex for lo
After this sequence, the only packets that will be passed up are
those received on loopback that pass the attached filter.
Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c1878f7a
    • Soheil Hassas Yeganeh's avatar
      tcp: provide timestamps for partial writes · ad02c4f5
      Soheil Hassas Yeganeh authored 
      For TCP sockets, TX timestamps are only captured when the user data
is successfully and fully written to the socket. In many cases,
however, TCP writes can be partial for which no timestamp is
collected.

Collect timestamps whenever any user data is (fully or partially)
copied into the socket. Pass tcp_write_queue_tail to tcp_tx_timestamp
instead of the local skb pointer since it can be set to NULL on
the error path.

Note that tcp_write_queue_tail can be NULL, even if bytes have been
copied to the socket. This is because acknowledgements are being
processed in tcp_sendmsg(), and by the time tcp_tx_timestamp is
called tcp_write_queue_tail can be NULL. For such cases, this patch
does not collect any timestamps (i.e., it is best-effort).

This patch is written with suggestions from Willem de Bruijn and
Eric Dumazet.

Change-log V1 -> V2:
	- Use sockc.tsflags instead of sk->sk_tsflags.
	- Use the same code path for normal writes and errors.
Signed-off-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
Acked-by: default avatarYuchung Cheng <ycheng@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Acked-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ad02c4f5
    • David S. Miller's avatar
      Merge tag 'rxrpc-rewrite-20170105' of... · 37e65dc1
      David S. Miller authored 
      Merge tag 'rxrpc-rewrite-20170105' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Update tracing and proc interfaces

This set of patches fixes and extends tracing:

 (1) Fix the handling of enum-to-string translations so that external
     tracing tools can make use of it by using TRACE_DEFINE_ENUM.

 (2) Extend a couple of tracepoints to export some extra available
     information and add three new tracepoints to allow monitoring of
     received DATA packets, call disconnection and improper/implicit call
     termination.

and adds a bit more procfs-exported information:

 (3) Show a call's hard-ACK cursors in /proc/net/rxrpc_calls.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      37e65dc1
    • Volodymyr Bendiuga's avatar
      net:dsa: check for EPROBE_DEFER from dsa_dst_parse() · 5e6eb456
      Volodymyr Bendiuga authored 
      Since there can be multiple dsa switches stacked together but
not all of devicetree nodes available at the time of calling
dsa_dst_parse(), EPROBE_DEFER can be returned by it. When this
happens, only the last dsa switch has to be deleted by
dsa_dst_del_ds(), but not the whole list, because next time linux
cames back to this function it will try to add only the last dsa
switch which returned EPROBE_DEFER.
Signed-off-by: default avatarVolodymyr Bendiuga <volodymyr.bendiuga@gmail.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5e6eb456
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