linux-toradex.git/drivers/net/ethernet/netronome, branch v4.9.58

nfp: fix infinite loop on umapping cleanup

2017-08-30T08:21:40+00:00

[ Upstream commit eac2c68d663effb077210218788952b5a0c1f60e ]

The while loop that performs the dma page unmapping never decrements
index counter f and hence loops forever. Fix this with a pre-decrement
on f.

Detected by CoverityScan, CID#1357309 ("Infinite loop")

Fixes: 4c3523623dc0 ("net: add driver for Netronome NFP4000/NFP6000 NIC VFs")
Signed-off-by: Colin Ian King 
Acked-by: Jakub Kicinski 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

nfp: bpf: zero extend 4 byte context loads

2016-09-30T06:10:15+00:00

Set upper 32 bits of destination register to zeros after
load from the context structure.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

nfp: bpf: improve handling for disabled BPF syscall

2016-09-26T06:26:29+00:00

I stumbled over a new warning during randconfig testing,
with CONFIG_BPF_SYSCALL disabled:

drivers/net/ethernet/netronome/nfp/nfp_net_offload.c: In function 'nfp_net_bpf_offload':
drivers/net/ethernet/netronome/nfp/nfp_net_offload.c:263:3: error: '*((void *)&res+4)' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/net/ethernet/netronome/nfp/nfp_net_offload.c:263:3: error: 'res.n_instr' may be used uninitialized in this function [-Werror=maybe-uninitialized]

As far as I can tell, this is a false positive caused by the compiler
getting confused about a function that is partially inlined, but it's
easy to avoid while improving the code:

The nfp_bpf_jit() stub helper for that configuration is unusual as it
is defined in a header file but not marked 'static inline'. By moving
the compile-time check into the caller using the IS_ENABLED() macro,
we can remove that stub and simplify the nfp_net_bpf_offload_prepare()
function enough to unconfuse the compiler.

Fixes: 7533fdc0f77f ("nfp: bpf: add hardware bpf offload")
Signed-off-by: Arnd Bergmann 
Acked-by: Jakub Kicinski 
Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-09-23T10:46:57+00:00

nfp: bpf: add offload of TC direct action mode

2016-09-21T23:50:03+00:00

Add offload of TC in direct action mode.  We just need
to provide appropriate checks in the verifier and
a new outro block to translate the exit codes to what
data path expects

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

nfp: bpf: add support for legacy redirect action

2016-09-21T23:50:03+00:00

Data path has redirect support so expressing redirect
to the port frame came from is a trivial matter of
setting the right result code.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

nfp: bpf: add packet marking support

2016-09-21T23:50:03+00:00

Add missing ABI defines and eBPF instructions to allow
mark to be passed on and extend prepend parsing on the
RX path to pick it up from packet metadata.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

nfp: bpf: allow offloaded filters to update stats

2016-09-21T23:50:03+00:00

Periodically poll stats and call into offloaded actions
to update them.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

nfp: bpf: add hardware bpf offload

2016-09-21T23:50:03+00:00

Add hardware bpf offload on our smart NICs.  Detect if
capable firmware is loaded and use it to load the code JITed
with just added translator onto programmable engines.

This commit only supports offloading cls_bpf in legacy mode
(non-direct action).

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

nfp: add BPF to NFP code translator

2016-09-21T23:50:02+00:00

Add translator for JITing eBPF to operations which
can be executed on NFP's programmable engines.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller