IOV code is very intrusive in its manipulation of the status block
database.
Add a new auxiliary function to allow the PF to find an available unused
status block to configure for a specific VF's MSI-x vector.
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Current code assumes there's a known layout for SBs in the IGU,
where all the SBs of a single entity would be laid in consecutive
order of vectors.

While the assumption is still kept by management firmware, we already
have the necessary information to eliminate it, so no reason to keep
it in code.
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We already have an API struct that contains interrupt-related
numbers. Use it to encapsulate all information relating to the
status of SBs as (used|free).
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

An additional step for relaxing the IGU order assumption, we now add
an auxiliary function that can be used for finding the HW status block
that's associated with a given MSI-x vector.
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In qed code, sb_id means 2 different things:
  - An interrupt vector [usually when received as a parameter from
    a protocol driver, but not only] that's associated with a status
    block.

  - An index to a status block entity existing in HW.

This patch renames the references to the HW entity, adding an 'igu_'
prefix to allow an easier distinction.
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As a first step for relaxing various assumptions done by driver
about the IGU mapping, the driver is now going to read the entire
IGU into a shadow copy, and mark in its database each status block
that's relevant for it.
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Separate the portions controlling interrupt enablement form those
controlling the ability of HW to generate attentions.
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

function ksz_rcv can be made static as it does not need to be
in global scope. Reformat arguments to make it checkpatch warning
free too.

Cleans up sparse warning: "symbol 'ksz_rcv' was not declared. Should
it be static?"
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NWoojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since the commit 55454a56 ("ppp: avoid dealock on recursive xmit"),
the PPP xmit path is protected by wrapper functions which disable the
bh already. So it is unnecessary to disable the bh again in the real
xmit path.
Signed-off-by: NGao Feng <gfree.wind@vip.163.com>
Acked-by: NGuillaume Nault <g.nault@alphalink.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

recent updates to inet_rtm_getroute dropped skb_dst_set in
inet_rtm_getroute. This patch restores it because it is
needed to release the dst correctly.

Fixes: 3765d35e ("net: ipv4: Convert inet_rtm_getroute to rcu versions of route lookup")
Reported-by: NJohn Fastabend <john.fastabend@gmail.com>
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Woojung Huh says:

====================
dsa: add Microchip KSZ9477 DSA driver

This series of patches is for Microchip KSZ9477 DSA driver.
KSZ9477 is 7 ports GigE switch with numerous advanced features.
5 ports are 10/100/1000 Mbps internal PHYs and 2 ports have
Interfaces to SGMII, RGMII, MII or RMII.

This patch supports VLAN, MDB, FDB and port mirroring offloads.

Welcome reviews and comments from community.

Note: Tests are performed on internal development board.

V5
- add missing MODULE_LICENSE

V4
- update per review comments
- cosmetic changes
- net/dsa/tag_ksz.c
  * skb_put() & memset() are changed to skb_put_padto()
- drivers/net/dsa/microchip/ksz_common.
   * vlan access mutex is updated
   * mib_names[] is changed to static const

V3
- update per review comments
- cosmetic changes
- drivers/net/dsa/microchip/ksz_common.c
  * clean up ksz_switch_chips[]
  * consolidate checking loops into functions
  * update mutex for better locking
  * replace devm_kmalloc_array() to devm_kcalloc()
- MAINTAINERS
  * add missing net/dsa/tag_ksz.c

V2
- update per review comments
- several cosmetic changes
- net/dsa/tag_ksz.c
  * constants are changed to defines
  * remove skb_linearize() in ksz_rcv()
  * ksz_xmit()checks skb tailroom before allocate new skb
- drivers/net/phy/micrel.c
  * remove PHY_HAS_MAGICANEG from ksphy_driver[]
- drivers/net/dsa/microchip/ksz_common.c
  * add timeout to avoid endless loop
  * port initialization is move to ksz_port_enable() instead of  ksz_setup_ports()
- Documentation/devicetree/bindings/net/dsa/ksz.txt
  * fix typo and indentations
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding maintainer of Microchip KSZ switches.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NWoojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A sample SPI configuration for Microchip KSZ switches.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NWoojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The KSZ9477 is a fully integrated layer 2, managed, 7 ports GigE switch
with numerous advanced features. 5 ports incorporate 10/100/1000 Mbps PHYs.
The other 2 ports have interfaces that can be configured as SGMII, RGMII, MII
or RMII. Either of these may connect directly to a host processor or
to an external PHY. The SGMII port may interface to a fiber optic transceiver.

This driver currently supports vlan, fdb, mdb & mirror dsa switch operations.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NWoojung Huh <Woojung.Huh@microchip.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding Microchip 9477 Phy included in KSZ9477 Switch.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NWoojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding support for the Microchip KSZ switch family tail tagging.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NWoojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Alexei Starovoitov says:

====================
bpf: stack depth tracking

Introduce tracking of bpf program stack depth in the verifier and use that
info to reduce bpf program stack consumption in the interpreter and x64 JIT.
Other JITs can take advantage of it as well in the future.
Most of the programs consume very little stack, so it's good optimization
in general and it's the first step toward bpf to bpf function calls.

Also use internal opcode for bpf_tail_call() marking to make clear
that jmp|call|x opcode is not uapi and may be used for actual
indirect call opcode in the future.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Take advantage of stack_depth tracking in x64 JIT.
Round up allocated stack by 8 bytes to make sure it stays aligned
for functions called from JITed bpf program.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

in order to JIT programs with different stack sizes we need to
make epilogue and exception path to be stack size independent,
hence move auxiliary stack space from the bottom of the stack
to the top of the stack.
Nice side effect is that JITed function prologue becomes shorter
due to imm8 offset encoding vs imm32.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

16 __bpf_prog_run() interpreters for various stack sizes add .text
but not a lot comparing to run-time stack savings

   text	   data	    bss	    dec	    hex	filename
  26350   10328     624   37302    91b6 kernel/bpf/core.o.before_split
  25777   10328     624   36729    8f79 kernel/bpf/core.o.after_split
  26970	  10328	    624	  37922	   9422	kernel/bpf/core.o.now
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

test_bpf.ko doesn't call verifier before selecting interpreter or JITing,
hence the tests need to manually specify the amount of stack they consume.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

To track stack depth of classic bpf programs we only need
to analyze ST|STX instructions, since check_load_and_stores()
verifies that programs can load from stack only after write.

We also need to change the way cBPF stack slots map to eBPF stack,
since typical classic programs are using slots 0 and 1, so they
need to map to stack offsets -4 and -8 respectively in order
to take advantage of small stack interpreter and JITs.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The next set of patches will take advantage of stack_depth tracking,
so make sure that the program that does bpf_tail_call() has
stack depth large enough for the callee.
We could have tracked the stack depth of the prog_array owner program
and only allow insertion of the programs with stack depth less
than the owner, but it will break existing applications.
Some of them have trivial root bpf program that only does
multiple bpf_tail_calls and at init time the prog array is empty.
In the future we may add a flag to do such tracking optionally,
but for now play simple and safe.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

teach verifier to track bpf program stack depth
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

split __bpf_prog_run() interpreter into stack allocation and execution parts.
The code section shrinks which helps interpreter performance in some cases.
   text	   data	    bss	    dec	    hex	filename
  26350	  10328	    624	  37302	   91b6	kernel/bpf/core.o.before
  25777	  10328	    624	  36729	   8f79	kernel/bpf/core.o.after

Very short programs got slower (due to extra function call):
Before:
test_bpf: #89 ALU64_ADD_K: 1 + 2 = 3 jited:0 7 PASS
test_bpf: #90 ALU64_ADD_K: 3 + 0 = 3 jited:0 8 PASS
test_bpf: #91 ALU64_ADD_K: 1 + 2147483646 = 2147483647 jited:0 7 PASS
test_bpf: #92 ALU64_ADD_K: 4294967294 + 2 = 4294967296 jited:0 11 PASS
test_bpf: #93 ALU64_ADD_K: 2147483646 + -2147483647 = -1 jited:0 7 PASS
After:
test_bpf: #89 ALU64_ADD_K: 1 + 2 = 3 jited:0 11 PASS
test_bpf: #90 ALU64_ADD_K: 3 + 0 = 3 jited:0 11 PASS
test_bpf: #91 ALU64_ADD_K: 1 + 2147483646 = 2147483647 jited:0 11 PASS
test_bpf: #92 ALU64_ADD_K: 4294967294 + 2 = 4294967296 jited:0 14 PASS
test_bpf: #93 ALU64_ADD_K: 2147483646 + -2147483647 = -1 jited:0 10 PASS

Longer programs got faster:
Before:
test_bpf: #266 BPF_MAXINSNS: Ctx heavy transformations jited:0 20286 20513 PASS
test_bpf: #267 BPF_MAXINSNS: Call heavy transformations jited:0 31853 31768 PASS
test_bpf: #268 BPF_MAXINSNS: Jump heavy test jited:0 9815 PASS
test_bpf: #269 BPF_MAXINSNS: Very long jump backwards jited:0 6 PASS
test_bpf: #270 BPF_MAXINSNS: Edge hopping nuthouse jited:0 13959 PASS
test_bpf: #271 BPF_MAXINSNS: Jump, gap, jump, ... jited:0 210 PASS
test_bpf: #272 BPF_MAXINSNS: ld_abs+get_processor_id jited:0 21724 PASS
test_bpf: #273 BPF_MAXINSNS: ld_abs+vlan_push/pop jited:0 19118 PASS
After:
test_bpf: #266 BPF_MAXINSNS: Ctx heavy transformations jited:0 19008 18827 PASS
test_bpf: #267 BPF_MAXINSNS: Call heavy transformations jited:0 29238 28450 PASS
test_bpf: #268 BPF_MAXINSNS: Jump heavy test jited:0 9485 PASS
test_bpf: #269 BPF_MAXINSNS: Very long jump backwards jited:0 12 PASS
test_bpf: #270 BPF_MAXINSNS: Edge hopping nuthouse jited:0 13257 PASS
test_bpf: #271 BPF_MAXINSNS: Jump, gap, jump, ... jited:0 213 PASS
test_bpf: #272 BPF_MAXINSNS: ld_abs+get_processor_id jited:0 19389 PASS
test_bpf: #273 BPF_MAXINSNS: ld_abs+vlan_push/pop jited:0 19583 PASS

For real world production programs the difference is noise.

This patch is first step towards reducing interpreter stack consumption.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

free up BPF_JMP | BPF_CALL | BPF_X opcode to be used by actual
indirect call by register and use kernel internal opcode to
mark call instruction into bpf_tail_call() helper.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jakub Kicinski says:

====================
nfp: move BPF offload code into app

This series moves the eBPF offload code out of netdev/vNIC handling and
starts building the nfp_app.  Port init is moved into the apps as well
because various apps associate vNICs, representors with ports differently.

First patch adds a helper for updating tc stats which has been waiting
in my tree to be included in any moderately related series.

Next series will bring communicating with FW using control messages,
then representors, BPF maps, tc flower... :)
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Free management FW info when app FW load failed.

Fixes: eefbde7e ("nfp: add hwmon support")
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Allow apps to associate private data with vNICs and move
BPF-specific fields of nfp_net to such structure.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move bulk of the eBPF offload code out of common vNIC code into
app-specific callbacks.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pure move of eBPF offload files to BPF app directory,
only change the names and relative header location.
nfp_asm.h stays in the main dir and it doesn't really
have to include nfp_bpf.h.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Let the app print its name in ethtool -i output.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Start fleshing out the apps by turning the vNIC init code to
a per-app callback.  The two initial apps we have are NIC and
eBPF.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Turn the function to read number of ports into a generic helper.
While at it make sure we propagate all errors other than -ENOENT.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

GCC 7 checks for fall through comments, add the two missing ones.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Forgetting to disable preemption around tcf_action_stats_update()
seems to be a common mistake.  Add a helper function for updating
stats on all actions of a filter.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
10GbE Intel Wired LAN Driver Updates 2017-05-31

This series contains updates to ixgbe and ixgbevf only.

Scott enables support for TSO & GSO for MPLS encapsulated packets for both
ixgbe and ixgbevf.

Liwei Song fixes an issue where seqcount/seqlock in ixgbe_get_stats64()
are not initialized in time, so move the initialization into probe routine
after the transmit and receive rings are initialized.

Paul cleans up led_[on|off] for X550EM_X, since the firmware configures
the PHY & MAC and we have no PHY access so LED on/off is not supported
with this device.

Emil provides several fixes, starting with enabling RSS on VF to VF
traffic on the same PF.  Fixed PHY identification, where the previous
method was unreliable, so use a different register to ensure proper
identification.  Cleaned up the logic which could cause us to
skip the link configuration, this skipping over the link configuration
was leaving SFP+ PHY's in an unstable state, so always call
setup_mac_link().  Added RS1 (rate select 1) support for ixgbe.  Lastly,
fixed incorrect logic in the setting up of SFP+ link speed.

Mark fixes the thermal sensor event logic, where it was being executed
when there really was no thermal event.  So simplify the logic to only
execute when there is a thermal event.

Tony adds additional error checks and reporting when setting a VF MAC
address to ensure that the MAC filter was successfully added.  Also
fixed possible truncation warnings, as well as implicit fallthrough
warnings.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2017-05-31

This series contains updates to i40e and i40evf only.

Jesse provides a couple of fixes, starting with cleaning up duplicate
lines of code.  Fixed a missing line which enables RSS as a negotiated
feature.  Since the VF does not have any way of reporting FCoE enabled,
so just force the code to always report FCoE as disabled.

Jake provides several fixes and changes, starting with fixing a race
condition in i40e.  The hardware has a limitation on transmit PTP packets,
which requires us to limit the driver to timestamping a single packet at
once.  This is done using a state bitlock which enforces that only one
timestamp request is honored at a time, unfortunately this suffers from
a race condition.  Fixed a corner case where we failed to cleanup the
bit lock after a failed transmit, and resulted in a state bit being
locked forever.  Added a new statistic which tracks when a transmit
timestamp request is skipped/ignored, since the driver can only handle
one transmit timestamp request at a time.

Christophe Jaillet fixes a NULL pointer dereference if kzalloc fails.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>