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  1. 23 6月, 2016 4 次提交
  3. 07 6月, 2016 1 次提交
  5. 18 5月, 2016 1 次提交
    • S
      IB/mlx4: Fix unaligned access in send_reply_to_slave · 04ef0f1a
      由 shamir rabinovitch 提交于 
      The problem is that the function 'send_reply_to_slave' gets the
'req_sa_mad' as a pointer whose address is only aliged to 4 bytes
but is 8 bytes in size.  This can result in unaligned access faults
on certain architectures.

Sowmini Varadhan pointed to this reply from Dave Miller that say
that memcpy should not be used to solve alignment issues:
https://lkml.org/lkml/2015/10/21/352

Optimization of memcpy to 'ldx' instruction can only happen if the
compiler knows that the size of the data we are copying is 8 bytes
and it assumes it is aligned to 8 bytes. If the compiler know the
type is not aligned to 8 it must not optimize the 8 byte copy.
Defining the data type as aligned to 4 forces the compiler to treat
all accesses as though they aren't aligned and avoids the 'ldx'
optimization.

Full credit for the idea goes to Jason Gunthorpe
<jgunthorpe@obsidianresearch.com>.
Signed-off-by: NShamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>
      04ef0f1a
  7. 14 5月, 2016 4 次提交
  9. 06 5月, 2016 1 次提交
    • H
      net/mlx4: Avoid wrong virtual mappings · 73898db0
      由 Haggai Abramovsky 提交于 
      The dma_alloc_coherent() function returns a virtual address which can
be used for coherent access to the underlying memory.  On some
architectures, like arm64, undefined behavior results if this memory is
also accessed via virtual mappings that are not coherent.  Because of
their undefined nature, operations like virt_to_page() return garbage
when passed virtual addresses obtained from dma_alloc_coherent().  Any
subsequent mappings via vmap() of the garbage page values are unusable
and result in bad things like bus errors (synchronous aborts in ARM64
speak).

The mlx4 driver contains code that does the equivalent of:
vmap(virt_to_page(dma_alloc_coherent)), this results in an OOPs when the
device is opened.

Prevent Ethernet driver to run this problematic code by forcing it to
allocate contiguous memory. As for the Infiniband driver, at first we
are trying to allocate contiguous memory, but in case of failure roll
back to work with fragmented memory.
Signed-off-by: NHaggai Abramovsky <hagaya@mellanox.com>
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Reported-by: NDavid Daney <david.daney@cavium.com>
Tested-by: NSinan Kaya <okaya@codeaurora.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      73898db0
  11. 28 4月, 2016 1 次提交
  13. 04 3月, 2016 1 次提交
    • A
      net: mellanox: add DEVLINK dependencies · 3d1cbe83
      由 Arnd Bergmann 提交于 
      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: NArnd Bergmann <arnd@arndb.de>
Fixes: 09d4d087 ("mlx4: Implement devlink interface")
Fixes: c4745500 ("mlxsw: Implement devlink interface")
Acked-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      3d1cbe83
  15. 02 3月, 2016 2 次提交
  17. 01 3月, 2016 3 次提交
    • M
      IB/mlx4: Add support for the don't trap rule · 0e451e88
      由 Marina Varshaver 提交于 
      Add support for receiving multicast/unicast traffic with
the don't trap rule.

Sniffing these packets requires a flow steering rule of type NORMAL
at priority 0 with flag IB_FLOW_ATTR_FLAGS_DONT_TRAP set.
Choosing between multicast or unicast is done via ethernet L2 dest_mac
mask and value:
- If mask is all zeros - unicast and multicast are set.
- If mask non zero - only mask with multicast bit 1 and rest 0 is
                     supported, the mac value will choose if it is
                     multicast or unicast rule.

If the mask multicast bit is on and some other bits are on too, it means
a request for specific multicast or unicast, this is not supported,
either receive all multicast or all unicast.

Only when limitations are met registered QP will receive requested type
but other QPs can receive same traffic if registered for it.
Otherwise, if limitations are not met, an error will be returned.

Limitations:
- Rule must be with priority 0.
- A0 mode is not supported.
- Sniffer QP cannot appear in any other flow steering rule.
Signed-off-by: NMarina Varshaver <marinav@mellanox.com>
Reviewed-by: NMatan Barak <matanb@mellanox.com>
Reviewed-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>
      0e451e88
    • M
      IB/core: Add don't trap flag to flow creation · a3100a78
      由 Marina Varshaver 提交于 
      Don't trap flag (i.e. IB_FLOW_ATTR_FLAGS_DONT_TRAP) indicates that QP
will receive traffic, but will not steal it.

When a packet matches a flow steering rule that was created with
the don't trap flag, the QPs assigned to this rule will get this
packet, but matching will continue to other equal/lower priority
rules. This will let other QPs assigned to those rules to get the
packet too.

If both don't trap rule and other rules have the same priority
and match the same packet, the behavior is undefined.

The don't trap flag can't be set with default rule types
(i.e. IB_FLOW_ATTR_ALL_DEFAULT, IB_FLOW_ATTR_MC_DEFAULT) as default rules
don't have rules after them and don't trap has no meaning here.
Signed-off-by: NMarina Varshaver <marinav@mellanox.com>
Reviewed-by: NMatan Barak <matanb@mellanox.com>
Reviewed-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>
      a3100a78
    • A
      IB/mlx4: Use boottime · 571e09ee
      由 Abhilash Jindal 提交于 
      Wall time obtained from ktime_get_real_ns is susceptible to sudden jumps due to
user setting the time or due to NTP.  Boot time is constantly increasing time
better suited for comparing two timestamps.
Signed-off-by: NAbhilash Jindal <klock.android@gmail.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>
      571e09ee
  19. 17 2月, 2016 3 次提交
  21. 20 1月, 2016 10 次提交
  23. 24 12月, 2015 3 次提交
  25. 23 12月, 2015 2 次提交
  27. 09 12月, 2015 2 次提交
  29. 07 12月, 2015 1 次提交
  31. 29 10月, 2015 1 次提交