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David S. Miller 94f7153e41 RxRPC rewrite
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Merge tag 'rxrpc-rewrite-20160304' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
RxRPC: Rewrite part 1

Here's the first set of patches from my RxRPC rewrite, aimed at net-next.
These do some clean ups and bug fixes.  Most of the changes are small, but
there are a couple of bigger changes:

 (*) Convert call flag numbers and event numbers into enums.  Then rename
     the event numbers to all have _EV_ in their name to stop confusion.
     Fix one instance of an event bit being used instead of a flag bit.

 (*) A copy of the Rx protocol header is kept in the sk_buff private data.
     Keep this in host byte order rather than network byte order as it
     makes more sense.  A number of other fields then get converted into
     host byte order too.

     Conversion between host and network byte order is then done at the
     packet reception/generation stage.

This is based on net-next/master
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 17:19:16 -05:00
David S. Miller 3d1c6df8cb Merge branch 'DIV_ROUND_UP-uapi'
Nicolas Dichtel says:

====================
uapi: consolidate DIV_ROUND_UP definition

The inital goal was to consolidate ethtool.h uapi header. But I took the
opportunity to remove all duplicate definitions of DIV_ROUND_UP.

v3: add patch #2 and #3

v2: split the patch
    define DIV_ROUND_UP in uapi
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 16:10:37 -05:00
Nicolas Dichtel 14e2037902 ethtool.h: define INT_MAX for userland
INT_MAX needs limits.h in userland.
When ethtool.h is included by a userland app, we got the following error:

.../usr/include/linux/ethtool.h: In function 'ethtool_validate_speed':
.../usr/include/linux/ethtool.h:1471:18: error: 'INT_MAX' undeclared (first use in this function)
  return speed <= INT_MAX || speed == SPEED_UNKNOWN
                  ^

Fixes: e02564ee33 ("ethtool: make validate_speed accept all speeds between 0 and INT_MAX")
CC: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 16:10:37 -05:00
Nicolas Dichtel 166cc71367 drm/vmwgfx: remove userland definition of DIV_ROUND_UP
Let's use __KERNEL_DIV_ROUND_UP, which is defined in uapi/linux/kernel.h.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 16:10:36 -05:00
Nicolas Dichtel 28466e0f24 cxgb4i: don't redefine DIV_ROUND_UP
let's use the common definition to avoid the following warning during the
compilation:

drivers/scsi/cxgbi/cxgb4i/cxgb4i.c:161:0: warning: "DIV_ROUND_UP" redefined
 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
 ^
In file included from include/linux/list.h:8:0,
                 from include/linux/module.h:9,
                 from drivers/scsi/cxgbi/cxgb4i/cxgb4i.c:16:
include/linux/kernel.h:67:0: note: this is the location of the previous definition
 #define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP
 ^

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 16:10:36 -05:00
Nicolas Dichtel b5d3755a22 uapi: define DIV_ROUND_UP for userland
DIV_ROUND_UP is defined in linux/kernel.h only for the kernel.
When ethtool.h is included by a userland app, we got the following error:

include/linux/ethtool.h:1218:8: error: variably modified 'queue_mask' at file scope
  __u32 queue_mask[DIV_ROUND_UP(MAX_NUM_QUEUE, 32)];
        ^

Let's add a common definition in uapi and use it everywhere.

Fixes: ac2c7ad0e5 ("net/ethtool: introduce a new ioctl for per queue setting")
CC: Kan Liang <kan.liang@intel.com>
Suggested-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 16:10:36 -05:00
Simon Horman 9b2f8f616a nfp: remove Rolf Neugebauer as co-maintainer
Rolf is no longer in his previous role at Netronome and as far as I know no
longer working on the NFP driver. Thus it does not seem appropriate for him
to be a co-maintainer anymore.

Reviewed-by: Dinan Gunawardena <dinan.gunawardena@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 14:14:22 -05:00
David Howells a4373a489e rxrpc: Don't try to map ICMP to error as the lower layer already did that
In the ICMP message processing code, don't try to map ICMP codes to UNIX
error codes as the caller (IPv4/IPv6) already did that for us (ee_errno).

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 16:02:03 +00:00
David Howells ab802ee0ab rxrpc: Clear the unused part of a sockaddr_rxrpc for memcmp() use
Clear the unused part of a sockaddr_rxrpc structs so that memcmp() can be
used to compare them.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:59:49 +00:00
David Howells 2b15ef15bc rxrpc: rxkad: Casts are needed when comparing be32 values
Forced casts are needed to avoid sparse warning when directly comparing
be32 values.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:59:13 +00:00
David Howells 098a20991d rxrpc: rxkad: The version number in the response should be net byte order
The version number rxkad places in the response should be network byte
order.

Whilst we're at it, rearrange the code to be more readable.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:59:00 +00:00
David Howells ee72b9fddb rxrpc: Use ACCESS_ONCE() when accessing circular buffer pointers
Use ACCESS_ONCE() when accessing the other-end pointer into a circular
buffer as it's possible the other-end pointer might change whilst we're
doing this, and if we access it twice, we might get some weird things
happening.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:58:06 +00:00
David Howells b4f1342f91 rxrpc: Adjust some whitespace and comments
Remove some excess whitespace, insert some missing spaces and adjust a
couple of comments.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:56:19 +00:00
David Howells 351c1e6486 rxrpc: Be more selective about the types of received packets we accept
Currently, received RxRPC packets outside the range 1-13 are rejected.
There are, however, holes in the range that should also be rejected - plus
at least one type we don't yet support - so reject these also.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:56:06 +00:00
David Howells ee6fe085a9 rxrpc: Fix defined range for /proc/sys/net/rxrpc/rx_mtu
The upper bound of the defined range for rx_mtu is being set in the same
member as the lower bound (extra1) rather than the correct place (extra2).
I'm not entirely sure why this compiles.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:55:32 +00:00
David Howells e33b3d97bc rxrpc: The protocol family should be set to PF_RXRPC not PF_UNIX
Fix the protocol family set in the proto_ops for rxrpc to be PF_RXRPC not
PF_UNIX.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:54:27 +00:00
David Howells 0d12f8a402 rxrpc: Keep the skb private record of the Rx header in host byte order
Currently, a copy of the Rx packet header is copied into the the sk_buff
private data so that we can advance the pointer into the buffer,
potentially discarding the original.  At the moment, this copy is held in
network byte order, but this means we're doing a lot of unnecessary
translations.

The reasons it was done this way are that we need the values in network
byte order occasionally and we can use the copy, slightly modified, as part
of an iov array when sending an ack or an abort packet.

However, it seems more reasonable on review that it would be better kept in
host byte order and that we make up a new header when we want to send
another packet.

To this end, rename the original header struct to rxrpc_wire_header (with
BE fields) and institute a variant called rxrpc_host_header that has host
order fields.  Change the struct in the sk_buff private data into an
rxrpc_host_header and translate the values when filling it in.

This further allows us to keep values kept in various structures in host
byte order rather than network byte order and allows removal of some fields
that are byteswapped duplicates.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:53:46 +00:00
David Howells 4c198ad17a rxrpc: Rename call events to begin RXRPC_CALL_EV_
Rename call event names to begin RXRPC_CALL_EV_ to distinguish them from the
flags.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:53:46 +00:00
David Howells 5b8848d149 rxrpc: Convert call flag and event numbers into enums
Convert call flag and event numbers into enums and move their definitions
outside of the struct.

Also move the call state enum outside of the struct and add an extra
element to count the number of states.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:53:46 +00:00
David Howells e721498a63 rxrpc: Fix a case where a call event bit is being used as a flag bit
Fix a case where RXRPC_CALL_RELEASE (an event) is being used to specify a
flag bit.  RXRPC_CALL_RELEASED should be used instead.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-03-04 15:53:46 +00:00
Eric Dumazet 1f27cde313 net: sched: use pfifo_fast for non real queues
Some devices declare a high number of TX queues, then set a much
lower real_num_tx_queues

This cause setups using fq_codel, sfq or fq as the default qdisc to consume
more memory than really needed.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 17:38:46 -05:00
David Ahern 799977d9aa net: ipv6: Fix refcnt on host routes
Andrew and Ying Huang's test robot both reported usage count problems that
trace back to the 'keep address on ifdown' patch.

>From Andrew:
We execute CRIU test on linux-next. On the current linux-next kernel
they hangs on creating a network namespace.

The kernel log contains many massages like this:
[ 1036.122108] unregister_netdevice: waiting for lo to become free.
Usage count = 2
[ 1046.165156] unregister_netdevice: waiting for lo to become free.
Usage count = 2
[ 1056.210287] unregister_netdevice: waiting for lo to become free.
Usage count = 2

I tried to revert this patch and the bug disappeared.

Here is a set of commands to reproduce this bug:

[root@linux-next-test linux-next]# uname -a
Linux linux-next-test 4.5.0-rc6-next-20160301+ #3 SMP Wed Mar 2
17:32:18 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

[root@linux-next-test ~]# unshare -n
[root@linux-next-test ~]# ip link set up dev lo
[root@linux-next-test ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
[root@linux-next-test ~]# logout
[root@linux-next-test ~]# unshare -n

 -----

The problem is a change made to RTM_DELADDR case in __ipv6_ifa_notify that
was added in an early version of the offending patch and is no longer
needed.

Fixes: f1705ec197 ("net: ipv6: Make address flushing on ifdown optional")
Cc: Andrey Wagin <avagin@gmail.com>
Cc: Ying Huang <ying.huang@linux.intel.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Tested-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 17:26:18 -05:00
Lada Trimasova b54b8c2d6e net: ezchip: adapt driver to little endian architecture
Since ezchip network driver is written with big endian EZChip platform it
is necessary to add support for little endian architecture.

The first issue is that the order of the bits in a bit field is
implementation specific. So all the bit fields are removed.
Named constants are used to access necessary fields.

And the second one is that network byte order is big endian.
For example, data on ethernet is transmitted with most-significant
octet (byte) first. So in case of little endian architecture
it is important to swap data byte order when we read it from
register. In case of unaligned access we can use "get_unaligned_be32"
and in other case we can use function "ioread32_rep" which reads all
data from register and works either with little endian or big endian
architecture.

And then when we are going to write data to register we need to restore
byte order using the function "put_unaligned_be32" in case of
unaligned access and in other case "iowrite32_rep".

The last little fix is a space between type and pointer to observe
coding style.

Signed-off-by: Lada Trimasova <ltrimas@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Noam Camus <noamc@ezchip.com>
Cc: Tal Zilcer <talz@ezchip.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 17:20:08 -05:00
Simon Horman 274ba628a3 sh_eth, ravb: Use ARCH_RENESAS
Make use of ARCH_RENESAS in place of ARCH_SHMOBILE.

This is part of an ongoing process to migrate from ARCH_SHMOBILE to
ARCH_RENESAS the motivation for which being that RENESAS seems to be a more
appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 17:09:08 -05:00
Arnd Bergmann 3d1cbe839a net: mellanox: add DEVLINK dependencies
The new NET_DEVLINK infrastructure can be a loadable module, but the drivers
using it might be built-in, which causes link errors like:

drivers/net/built-in.o: In function `mlx4_load_one':
:(.text+0x2fbfda): undefined reference to `devlink_port_register'
:(.text+0x2fc084): undefined reference to `devlink_port_unregister'
drivers/net/built-in.o: In function `mlxsw_sx_port_remove':
:(.text+0x33a03a): undefined reference to `devlink_port_type_clear'
:(.text+0x33a04e): undefined reference to `devlink_port_unregister'

There are multiple ways to avoid this:

a) add 'depends on NET_DEVLINK || !NET_DEVLINK' dependencies
   for each user
b) use 'select NET_DEVLINK' from each driver that uses it
   and hide the symbol in Kconfig.
c) make NET_DEVLINK a 'bool' option so we don't have to
   list it as a dependency, and rely on the APIs to be
   stubbed out when it is disabled
d) use IS_REACHABLE() rather than IS_ENABLED() to check for
   NET_DEVLINK in include/net/devlink.h

This implements a variation of approach a) by adding an
intermediate symbol that drivers can depend on, and changes
the three drivers using it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 09d4d087cd ("mlx4: Implement devlink interface")
Fixes: c4745500e9 ("mlxsw: Implement devlink interface")
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 17:08:59 -05:00
David S. Miller aefd3fb26e Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Johan Hedberg says:

====================
pull request: bluetooth-next 2016-03-01

Here's our main set of Bluetooth & 802.15.4 patches for the 4.6 kernel.

 - New Bluetooth HCI driver for Intel/AG6xx controllers
 - New Broadcom ACPI IDs
 - LED trigger support for indicating Bluetooth powered state
 - Various fixes in mac802154, 6lowpan and related drivers
 - New USB IDs for AR3012 Bluetooth controllers

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 16:27:23 -05:00
John Fastabend 5eb4dce3b3 net: relax setup_tc ndo op handle restriction
I added this check in setup_tc to multiple drivers,

 if (handle != TC_H_ROOT || tc->type != TC_SETUP_MQPRIO)

Unfortunately restricting to TC_H_ROOT like this breaks the old
instantiation of mqprio to setup a hardware qdisc. This patch
relaxes the test to only check the type to make it equivalent
to the check before I broke it. With this the old instantiation
continues to work.

A good smoke test is to setup mqprio with,

# tc qdisc add dev eth4 root mqprio num_tc 8 \
  map 0 1 2 3 4 5 6 7 \
  queues 0@0 1@1 2@2 3@3 4@4 5@5 6@6 7@7

Fixes: e4c6734eaa ("net: rework ndo tc op to consume additional qdisc handle paramete")
Reported-by: Singh Krishneil <krishneil.k.singh@intel.com>
Reported-by: Jake Keller <jacob.e.keller@intel.com>
CC: Murali Karicheri <m-karicheri2@ti.com>
CC: Shradha Shah <sshah@solarflare.com>
CC: Or Gerlitz <ogerlitz@mellanox.com>
CC: Ariel Elior <ariel.elior@qlogic.com>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Bruce Allan <bruce.w.allan@intel.com>
CC: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-03 16:25:15 -05:00
Eric Engestrom 998fc1d080 ethernet/atl1c: remove left over dead code
Left over from c24588afc5
("atl1c: using fixed TXQ configuration for l2cb and l1c")

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 15:00:55 -05:00
Eric Engestrom a9d562358b net/ipv4: remove left over dead code
8cc785f6f4 ("net: ipv4: make the ping
/proc code AF-independent") removed the code using it, but renamed this
variable instead of removing it.

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 15:00:55 -05:00
Eric Engestrom 6353e1875d net/rtnetlink: remove dead code
3b766cd832 ("net/core: Add reading VF
statistics through the PF netdevice") added that variable but it's never
been used.

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 15:00:55 -05:00
David S. Miller 3ebeac1d02 Merge branch 'cxgb4-next'
Hariprasad Shenai says:

====================
cxgb4/cxgb4vf: Cleanup and minor fixes

This series sets FBMIN to 64 bytes for Chelsio's T6 series of adapters,
check to replenish fl is revised, some code cleanup in cxgb4vf sge
initialization code and removes dead code.

This patch series has been created against net-next tree and includes
patches on cxgb4 and cxgb4vf driver.

We have included all the maintainers of respective drivers. Kindly review
the change and let us know in case of any review comments.
====================
2016-03-02 14:46:30 -05:00
Hariprasad Shenai f1ea2fe05d cxgb4vf: Remove dead functions collect_netdev_[um]c_list_addrs
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:46:30 -05:00
Hariprasad Shenai 5d7b80522b cxgb4vf: Remove redundant adapter ready check during probe
Function t4vf_wait_dev_ready() is already called in t4vf_prep_adapter(),
no need to call it again in adap_init0().

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:46:30 -05:00
Hariprasad Shenai cb440364c7 cxgb4vf: Make sge init code more readable
Adds a new function t4vf_fl_pkt_align() and use the same in SGE
initialization code to find out freelist packet alignment

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:46:29 -05:00
Hariprasad Shenai edadad80d6 cxgb4/cxgb4vf: For T6 adapter, set FBMIN to 64 bytes
T4 and T5 hardware will not coalesce Free List PCI-E Fetch Requests if
the Host Driver provides more Free List Pointers than the Fetch Burst
Minimum value.  So if we set FBMIN to 64 bytes and the Host Driver
supplies 128 bytes of Free List Pointer data, the hardware will issue two
64-byte PCI-E Fetch Requests rather than a single coallesced 128-byte
Fetch Request. T6 fixes this. So, for T4/T5 we set the FBMIN value to 128

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:46:29 -05:00
Hariprasad Shenai da08e4259f cxgb4/cxgb4vf: Use fl capacity to check if fl needs to be replenished
Use freelist capacity instead of freelist size while checking, if
freelist needs to be refilled

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:46:29 -05:00
David S. Miller d93e4093fb Merge branch 'stmmac-optimizations'
Alexandre TORGUE says:

====================
stmmac: enhance driver performances and update the version

According to Giuseppe, I send the v3 series.

This is a subset of patches to rework the driver in order to improve its
performances and make it more robust under stress conditions.

All patches have been ported on STi mainstream kernel branch and
tested on ARM STiH4xx platforms and newer ones.

This series also updates the driver version and prepares it
to include further development to support new chips.

In detail, these patches are:

o to rework and improve the internal DMA bus settings

  Fine tuning is mandatory on some platforms for both
  performance and stability issues.

o to rework and optimize the descriptor management.

  This will help a lot on performance side and preparing
  the inclusion on the GMAC4.x.

o to add a set of optimizations for both xmit and rx functions.

  These will help a lot on performance side and making the driver
  more robust in case of low memory conditions and under some
  stress test, performed for example on IP-STB.

Below some throughput figures obtained on some boxes before and after
the patches.

                       nuttcp (mbps)       iperf (Mbps)
------------------------------------------------------------------
                      tcp     udp          tcp      udp
                   tx   rx   tx  rx      tx   rx   tx  rx
                    ------------------------------------------
   old             680   800 480  506    760  800   600  700
   new             830   880 540  630    840  880   700   800

V2: - rx_copybreak is now managed by using ethtool.
V3: - improve comments on PCIe detailing that there are no regressions
    - rework some APIs to properly define some params as bool as expected
    - rework the formula to get the element inside the ring. Comparing V2,
	patches 4 and 13 have been merged because the same formula have been
	used. After this rework, no evident benefit has been noticed in terms
	of performances so the table above is still valid. Disassembling the
	code for SH4 and ARM, with the new formula just an instr is saved
	(depending on compiler flags) and this gives us not so relevanti gain,
	for example, on SH4 where some instr are executed in the same pipeline
	stage.
	Ring sizes are now fixed and maybe they can be reworked to be tuned
	w/o using stmmaceth= cmdline option. Indeed, nobody change these sizes
	and indeed the numbers selected by default respect the budget and
	avoid to pass invalid setup. These are the best driver default sizes
	for ring and chain.

====================
2016-03-02 14:21:34 -05:00
Giuseppe Cavallaro 3796e44ddc stmmac: update version to Oct_2015
This patch just updates the driver to the version fully
tested on STi platforms. This version is Oct_2015.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:34 -05:00
Giuseppe Cavallaro 120e87f91e stmmac: tune rx copy via threshold.
There is a threshold now used to also limit the skb allocation
when use zero-copy. This is to avoid that there are incoherence
in the ring due to a failure on skb allocation under very
aggressive testing and under low memory conditions.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:33 -05:00
Giuseppe Cavallaro 22ad383815 stmmac: do not perform zero-copy for rx frames
This patch is to allow this driver to copy tiny frames during the reception
process. This is giving more stability while stressing the driver on STi
embedded systems.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:33 -05:00
Fabrice Gasnier 8ecd80a5f6 stmmac: fix phy init when attached to a phy
phy_bus_name can be NULL when "fixed-link" property isn't used.
Then, since "stmmac: do not poll phy handler when attach a switch",
phy_bus_name ptr needs to be checked before strcmp is called.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:33 -05:00
Giuseppe Cavallaro 8e99fc5f88 stmmac: do not poll phy handler when attach a switch
This patch avoids to call the stmmac_adjust_link when
the driver is connected to a switch by using the FIXED_PHY
support. Prior this patch the phydev->irq was set as PHY_POLL
so periodically the phy handler was invoked spending useless
time because the link cannot actually change.
Note that the stmmac_adjust_link will be called just one
time and this guarantees that the ST glue logic will be
setup according to the mode and speed fixed.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:33 -05:00
Giuseppe Cavallaro 0e80bdc9a7 stmmac: first frame prep at the end of xmit routine
This patch is to fill the first descriptor just before granting
the DMA engine so at the end of the xmit.
The patch takes care about the algorithm adopted to mitigate the
interrupts, then it fixes the last segment in case of no fragments.
Moreover, this new implementation does not pass any "ter" field when
prepare the descriptors because this is not necessary.
The patch also details the memory barrier in the xmit.

As final results, this patch guarantees the same performances
but fixing a case if small datagram are sent. In fact, this
kind of test is impacted if no coalesce is done.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:33 -05:00
Giuseppe Cavallaro fbc80823a9 stmmac: set dirty index out of the loop
The dirty index can be updated out of the loop where all the
tx resources are claimed. This will help on performances too.
Also a useless debug printk has been removed from the main loop.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:32 -05:00
Fabrice Gasnier c363b6586c stmmac: optimize tx clean function
This patch "inline" get_tx_owner and get_ls routines. It Results in a
unique read to tdes0, instead of three, to check TX_OWN and LS bits,
and other status bits.

It helps improve driver TX path by removing two uncached read/writes
inside TX clean loop for enhanced descriptors but not for normal ones
because the des1 must be read in any case.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:32 -05:00
Giuseppe Cavallaro be434d5075 stmmac: optimize tx desc management
This patch is to optimize the way to manage the TDES inside the
xmit function. When prepare the frame, some settings (e.g. OWN
bit) can be merged. This has been reworked to improve the tx
performances.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:32 -05:00
Fabrice Gasnier c1fa3212be stmmac: merge get_rx_owner into rx_status routine.
The RDES0 register can be read several times while doing RX of a
packet.
This patch slightly improves RX path performance by reading rdes0
once for two operation: check rx owner, get rx status bits.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:32 -05:00
Giuseppe Cavallaro 96951366ce stmmac: add is_jumbo field to dma data
Optimize tx_clean by avoiding a des3 read in stmmac_clean_desc3().

In ring mode, TX, des3 seems only used when xmit a jumbo frame.
In case of normal descriptors, it may also be used for time
stamping.
Clean it in the above two case, without reading it.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:31 -05:00
Giuseppe Cavallaro 2a6d8e1726 stmmac: add last_segment field to dma data
last_segment field is read twice from dma descriptors in stmmac_clean().
Add last_segment to dma data so that this flag is from priv
structure in cache instead of memory.
It avoids reading twice from memory for each loop in stmmac_clean().

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:31 -05:00
Giuseppe Cavallaro 553e2ab313 stmmac: add length field to dma data
Currently, the code pulls out the length field when
unmapping a buffer directly from the descriptor. This will result
in an uncached read to a dma_alloc_coherent() region. There is no
need to do this, so this patch simply puts the value directly into
a data structure which will hit the cache.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-02 14:21:31 -05:00