Jacob Keller [Tue, 12 Oct 2021 00:41:10 +0000 (17:41 -0700)]
ice: devlink: add shadow-ram region to snapshot Shadow RAM
We have a region for reading the contents of the NVM flash as
a snapshot. This region does not allow reading the Shadow RAM, as it
always passes the FLASH_ONLY bit to the low level firmware interface.
Add a separate shadow-ram region which will allow snapshot of the
current contents of the Shadow RAM. This data is built from the NVM
contents but is distinct as the device builds up the Shadow RAM during
initialization, so being able to snapshot its contents can be useful
when attempting to debug flash related issues.
Fix the comment description of the nvm-flash region which incorrectly
stated that it filled the shadow-ram region, and add a comment
explaining that the nvm-flash region does not actually read the Shadow
RAM.
Jakub Kicinski [Tue, 14 Dec 2021 15:47:25 +0000 (07:47 -0800)]
ethtool: always write dev in ethnl_parse_header_dev_get
Commit 0976b888a150 ("ethtool: fix null-ptr-deref on ref tracker")
made the write to req_info.dev conditional, but as Eric points out
in a different follow up the structure is often allocated on the
stack and not kzalloc()'d so seems safer to always write the dev,
in case it's garbage on input.
David S. Miller [Wed, 15 Dec 2021 15:05:44 +0000 (15:05 +0000)]
Merge branch 'mlxsw-ipv6-underlay'
Ido Schimmel says:
====================
mlxsw: Add support for VxLAN with IPv6 underlay
So far, mlxsw only supported VxLAN with IPv4 underlay. This patchset
extends mlxsw to also support VxLAN with IPv6 underlay. The main
difference is related to the way IPv6 addresses are handled by the
device. See patch #1 for a detailed explanation.
Patch #1 creates a common hash table to store the mapping from IPv6
addresses to KVDL indexes. This table is useful for both IP-in-IP and
VxLAN tunnels with an IPv6 underlay.
Patch #2 converts the IP-in-IP code to use the new hash table.
Patches #3-#6 are preparations.
Patch #7 finally adds support for VxLAN with IPv6 underlay.
Patch #8 removes a test case that checked that VxLAN configurations with
IPv6 underlay are vetoed by the driver.
A follow-up patchset will add forwarding selftests.
====================
Amit Cohen [Tue, 14 Dec 2021 14:25:50 +0000 (16:25 +0200)]
mlxsw: Add support for VxLAN with IPv6 underlay
Currently, mlxsw driver supports VxLAN with IPv4 underlay only.
Add support for IPv6 underlay.
The main differences are:
* Learning is not supported for IPv6 FDB entries, use static entries and
do not allow 'learning' flag for IPv6 VxLAN.
* IPv6 addresses for FDB entries should be saved as part of KVDL.
Use the new API to allocate and release entries for IPv6 addresses.
* Spectrum ASICs do not fill UDP checksum, while in software IPv6 UDP
packets with checksum zero are dropped.
Force the relevant flags which allow the VxLAN device to generate UDP
packets with zero checksum and also receive them.
Amit Cohen [Tue, 14 Dec 2021 14:25:49 +0000 (16:25 +0200)]
mlxsw: spectrum_nve: Keep track of IPv6 addresses used by FDB entries
FDB entries that perform VxLAN encapsulation with an IPv6 underlay hold
a reference on a resource. Namely, the KVDL entry where the IPv6
underlay destination IP is stored. When such an FDB entry is deleted, it
needs to drop the reference from the corresponding KVDL entry.
To that end, maintain a hash table that maps an FDB entry (i.e., {MAC,
FID}) to the IPv6 address used by it.
Amit Cohen [Tue, 14 Dec 2021 14:25:47 +0000 (16:25 +0200)]
mlxsw: Split handling of FDB tunnel entries between address families
Currently, the function which adds/removes unicast tunnel FDB entries is
shared between IPv4 and IPv6, while for IPv6 it warns because there is
no support for it.
The code for IPv6 will be more complicated because it needs to
allocate/release a KVDL pointer for the underlay IPv6 address.
As a preparation for IPv6 underlay support, split the code according to
address family.
Amit Cohen [Tue, 14 Dec 2021 14:25:44 +0000 (16:25 +0200)]
mlxsw: spectrum: Add hash table for IPv6 address mapping
The device supports forwarding entries such as routes and FDBs that
perform tunnel (e.g., VXLAN, IP-in-IP) encapsulation or decapsulation.
When the underlay is IPv6, these entries do not encode the 128 bit IPv6
address used for encapsulation / decapsulation. Instead, these entries
encode a 24 bit pointer to an array called KVDL where the IPv6 address
is stored.
Currently, only IP-in-IP with IPv6 underlay is supported, but subsequent
patches will add support for VxLAN with IPv6 underlay. To avoid
duplicating the logic required to store and retrieve these IPv6
addresses, introduce a hash table that will store the mapping between
IPv6 addresses and their KVDL index.
David S. Miller [Wed, 15 Dec 2021 14:46:33 +0000 (14:46 +0000)]
Merge tag 'mlx5-updates-2021-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saed Mahameed says:
====================
mlx5-updates-2021-12-14
Parsing Infrastructure for TC actions:
The series introduce a TC action infrastructure to help
parsing TC actions in a generic way for both FDB and NIC rules.
To help maintain the parsing code of TC actions, we the parsing code to
action parser per action TC type in separate files, instead of having one
big switch case loop, duplicated between FDB and NIC parsers as before this
patchset.
Each TC flow_action->id is represented by a dedicated mlx5e_tc_act handler
which has callbacks to check if the specific action is offload supported and
to parse the specific action.
We move each case (TC action) handling into the specific handler, which is
responsible for parsing and determining if the action is supported.
====================
David S. Miller [Wed, 15 Dec 2021 10:59:57 +0000 (10:59 +0000)]
Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
Tony Nguyen says:
====================
100GbE Intel Wired LAN Driver Updates 2021-12-14
This series contains updates to ice driver only.
Haiyue adds support to query hardware for supported PTYPEs.
Jeff changes PTYPE validation to utilize the capabilities queried from
the hardware instead of maintaining a per DDP support list.
Brett refactors promiscuous functions to provide common and clear
interfaces to call for configuration.
Wojciech modifies DDP package load to simplify determining the final
state of the load.
Tony removes the use of ice_status from the driver. This involves
removing string conversion functions, converting variables and values to
standard errors, and clean up. He also removes an unused define.
Dan Carpenter removes unneeded casts.
====================
Joakim Zhang [Tue, 14 Dec 2021 10:50:46 +0000 (18:50 +0800)]
net: fec: fix system hang during suspend/resume
1. During normal suspend (WoL not enabled) process, system has posibility
to hang. The root cause is TXF interrupt coming after clocks disabled,
system hang when accessing registers from interrupt handler. To fix this
issue, disable all interrupts when system suspend.
2. System also has posibility to hang with WoL enabled during suspend,
after entering stop mode, then magic pattern coming after clocks
disabled, system will be waked up, and interrupt handler will be called,
system hang when access registers. To fix this issue, disable wakeup
irq in .suspend(), and enable it in .resume().
Conley Lee [Tue, 14 Dec 2021 09:11:06 +0000 (17:11 +0800)]
sun4i-emac.c: remove unnecessary branch
According to the current implementation of emac_rx, every arrived packet
will be processed in the while loop. So, there is no remain packet last
time. The skb_last field and this branch for dealing with it is
unnecessary.
Eric Dumazet [Tue, 14 Dec 2021 08:42:30 +0000 (00:42 -0800)]
ethtool: use ethnl_parse_header_dev_put()
It seems I missed that most ethnl_parse_header_dev_get() callers
declare an on-stack struct ethnl_req_info, and that they simply call
dev_put(req_info.dev) when about to return.
Add ethnl_parse_header_dev_put() helper to properly untrack
reference taken by ethnl_parse_header_dev_get().
Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info") Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Roi Dayan [Sun, 15 Aug 2021 10:23:14 +0000 (13:23 +0300)]
net/mlx5e: Move goto action checks into tc_action goto post parse op
Move goto action checks from parse nic/fdb funcs into the tc action
infra goto post parse op.
While moving this part also use NL_SET_ERR_MSG_MOD() instead of
NL_SET_ERR_MSG().
Roi Dayan [Wed, 11 Aug 2021 11:19:56 +0000 (14:19 +0300)]
net/mlx5e: Add post_parse() op to tc action infrastructure
The post_parse() op should be called after the parse op was called
for all actions. It could be an action state is dependent on other
actions. In the new op an action can fail the parse if the state
is not valid anymore.
Roi Dayan [Thu, 12 Aug 2021 13:02:58 +0000 (16:02 +0300)]
net/mlx5e: Move sample attr allocation to tc_action sample parse op
There is no reason to wait with the kmalloc to after parsing all
other actions. There could still be a failure later and before
offloading the rule. So alloc the mem when parsing.
The memory is being released on mlx5e_flow_put() which is called
also on error flow.
Roi Dayan [Mon, 12 Jul 2021 11:13:10 +0000 (14:13 +0300)]
net/mlx5e: Add tc action infrastructure
Add an infrastructure to help parsing tc actions in a generic way.
Supporting an action parser means implementing struct mlx5e_tc_act
for that action.
The infrastructure will give the possibility to be generic when parsing tc
actions, i.e. parse_tc_nic_actions() and parse_tc_fdb_actions().
To parse tc actions a user needs to allocate a parse_state instance
and pass it when iterating over the tc actions parsers.
If a parser doesn't exists then a user can treat it as unsupported.
To add an action parser a user needs to implement two callbacks.
The can_offload() callback to quickly check if an action can be offloaded.
The parse_action() callback to do actual parsing and prepare for offload.
Add implementation for drop, trap, mark and accept action parsers with this
commit to act as examples and implement usage of the new infrastructure for
those actions.
====================
net: dsa: hellcreek: Fix handling of MGMT protocols
this series fixes some minor issues with regards to management protocols
such as PTP and STP in the hellcreek DSA driver. Configure static FDB
for these protocols. The end result is:
|root@tsn:~# mv88e6xxx_dump --atu
|Using device <platform/ff240000.switch>
|ATU:
|FID MAC 0123 Age OBT Pass Static Reprio Prio
| 0 01:1b:19:00:00:00 1100 1 X X 6
| 1 01:00:5e:00:01:81 1100 1 X X 6
| 2 33:33:00:00:01:81 1100 1 X X 6
| 3 01:80:c2:00:00:0e 1100 1 X X X 6
| 4 01:00:5e:00:00:6b 1100 1 X X X 6
| 5 33:33:00:00:00:6b 1100 1 X X X 6
| 6 01:80:c2:00:00:00 1100 1 X X X 6
Changes since v1:
* Target net-next, as this never worked correctly and is not critical
* Add STP and PTP over UDP rules
* Use pass_blocked for PDelay messages only (Richard Cochran)
====================
Tony Nguyen [Thu, 7 Oct 2021 23:00:23 +0000 (16:00 -0700)]
ice: Remove excess error variables
ice_status previously had a variable to contain these values where other
error codes had a variable as well. With ice_status now being an int,
there is no need for two variables to hold error values. In cases where
this occurs, remove one of the excess variables and use a single one.
Some initialization of variables are no longer needed and have been
removed.
Tony Nguyen [Thu, 7 Oct 2021 22:58:01 +0000 (15:58 -0700)]
ice: Remove enum ice_status
Replace uses of ice_status to, as equivalent as possible, error codes.
Remove enum ice_status and its helper conversion function as they are no
longer needed.
Tony Nguyen [Thu, 7 Oct 2021 22:56:57 +0000 (15:56 -0700)]
ice: Use int for ice_status
To prepare for removal of ice_status, change the variables from
ice_status to int. This eases the transition when values are changed to
return standard int error codes over enum ice_status.
Tony Nguyen [Thu, 7 Oct 2021 22:56:02 +0000 (15:56 -0700)]
ice: Remove string printing for ice_status
Remove the ice_stat_str() function which prints the string
representation of the ice_status error code. With upcoming changes
moving away from ice_status, there will be no need for this function.
Wojciech Drewek [Thu, 7 Oct 2021 22:54:37 +0000 (15:54 -0700)]
ice: Refactor status flow for DDP load
Before this change, final state of the DDP pkg load process was
dependent on many variables such as: ice_status, pkg version,
ice_aq_err. The last one had be stored in hw->pkg_dwnld_status.
It was impossible to conclude this state just from ice_status, that's
why logging process of DDP pkg load in the caller was a little bit
complicated.
With this patch new status enum is introduced - ice_ddp_state.
It covers all the possible final states of the loading process.
What's tricky for ice_ddp_state is that not only
ICE_DDP_PKG_SUCCESS(=0) means that load was successful. Actually
three states mean that:
- ICE_DDP_PKG_SUCCESS
- ICE_DDP_PKG_SAME_VERSION_ALREADY_LOADED
- ICE_DDP_PKG_COMPATIBLE_ALREADY_LOADED
ice_is_init_pkg_successful can tell that information.
One ddp_state should not be used outside of ice_init_pkg which is
ICE_DDP_PKG_ALREADY_LOADED. It is more generic, it is used in
ice_dwnld_cfg_bufs to see if pkg is already loaded. At this point
we can't use one of the specific one (SAME_VERSION, COMPATIBLE,
NOT_SUPPORTED) because we don't have information on the package
currently loaded in HW (we are before calling ice_get_pkg_info).
We can get rid of hw->pkg_dwnld_status because we are immediately
mapping aq errors to ice_ddp_state in ice_dwnld_cfg_bufs.
Other errors like ICE_ERR_NO_MEMORY, ICE_ERR_PARAM are mapped the
generic ICE_DDP_PKG_ERR.
Brett Creeley [Tue, 2 Mar 2021 18:15:34 +0000 (10:15 -0800)]
ice: Refactor promiscuous functions
Some of the promiscuous mode functions take a boolean to indicate
set/clear, which affects readability. Refactor and provide an
interface for the promiscuous mode code with explicit set and clear
promiscuous mode operations.
Jeff Guo [Fri, 16 Jul 2021 22:16:43 +0000 (15:16 -0700)]
ice: refactor PTYPE validating
Since the capability of a PTYPE within a specific package could be
negotiated by checking the HW bit map, it means that there's no need
to maintain a different PTYPE list for each type of the package when
parsing PTYPE. So refactor the PTYPE validating mechanism.
It seems that the DSA tagger-owned storage changes were insufficiently
tested and do not work in all cases. Specifically, the NXP Bluebox 3
(arch/arm64/boot/dts/freescale/fsl-lx2160a-bluebox3.dts) got broken by
these changes, because
(a) I forgot that DSA_TAG_PROTO_SJA1110 exists and differs from
DSA_TAG_PROTO_SJA1105
(b) the Bluebox 3 uses a DSA switch tree with 2 switches, and the
tagger-owned storage patches don't cover that use case well, it
seems
Therefore, I'm sorry to say that there needs to be an API fixup: tagging
protocol drivers will from now on connect to individual switches from a
tree, rather than to the tree as a whole. This is more robust against
various ordering constraints in the DSA probe and teardown paths, and is
also symmetrical with the connection API exposed to the switch drivers
themselves, which is also per switch.
With these changes, the Bluebox 3 also works fine.
====================
Vladimir Oltean [Tue, 14 Dec 2021 01:45:36 +0000 (03:45 +0200)]
net: dsa: make tagging protocols connect to individual switches from a tree
On the NXP Bluebox 3 board which uses a multi-switch setup with sja1105,
the mechanism through which the tagger connects to the switch tree is
broken, due to improper DSA code design. At the time when tag_ops->connect()
is called in dsa_port_parse_cpu(), DSA hasn't finished "touching" all
the ports, so it doesn't know how large the tree is and how many ports
it has. It has just seen the first CPU port by this time. As a result,
this function will call the tagger's ->connect method too early, and the
tagger will connect only to the first switch from the tree.
This could be perhaps addressed a bit more simply by just moving the
tag_ops->connect(dst) call a bit later (for example in dsa_tree_setup),
but there is already a design inconsistency at present: on the switch
side, the notification is on a per-switch basis, but on the tagger side,
it is on a per-tree basis. Furthermore, the persistent storage itself is
per switch (ds->tagger_data). And the tagger connect and disconnect
procedures (at least the ones that exist currently) could see a fair bit
of simplification if they didn't have to iterate through the switches of
a tree.
To fix the issue, this change transforms tag_ops->connect(dst) into
tag_ops->connect(ds) and moves it somewhere where we already iterate
over all switches of a tree. That is in dsa_switch_setup_tag_protocol(),
which is a good placement because we already have there the connection
call to the switch side of things.
As for the dsa_tree_bind_tag_proto() method (called from the code path
that changes the tag protocol), things are a bit more complicated
because we receive the tree as argument, yet when we unwind on errors,
it would be nice to not call tag_ops->disconnect(ds) where we didn't
previously call tag_ops->connect(ds). We didn't have this problem before
because the tag_ops connection operations passed the entire dst before,
and this is more fine grained now. To solve the error rewind case using
the new API, we have to create yet one more cross-chip notifier for
disconnection, and stay connected with the old tag protocol to all the
switches in the tree until we've succeeded to connect with the new one
as well. So if something fails half way, the whole tree is still
connected to the old tagger. But there may still be leaks if the tagger
fails to connect to the 2nd out of 3 switches in a tree: somebody needs
to tell the tagger to disconnect from the first switch. Nothing comes
for free, and this was previously handled privately by the tagging
protocol driver before, but now we need to emit a disconnect cross-chip
notifier for that, because DSA has to take care of the unwind path. We
assume that the tagging protocol has connected to a switch if it has set
ds->tagger_data to something, otherwise we avoid calling its
disconnection method in the error rewind path.
The rest of the changes are in the tagging protocol drivers, and have to
do with the replacement of dst with ds. The iteration is removed and the
error unwind path is simplified, as mentioned above.
Vladimir Oltean [Tue, 14 Dec 2021 01:45:35 +0000 (03:45 +0200)]
net: dsa: sja1105: fix broken connection with the sja1110 tagger
The driver was incorrectly converted assuming that "sja1105" is the only
tagger supported by this driver. This results in SJA1110 switches
failing to probe:
sja1105 spi1.0: Unable to connect to tag protocol "sja1110": -EPROTONOSUPPORT
sja1105: probe of spi1.2 failed with error -93
Add DSA_TAG_PROTO_SJA1110 to the list of supported taggers by the
sja1105 driver. The sja1105_tagger_data structure format is common for
the two tagging protocols.
Fixes: c79e84866d2a ("net: dsa: tag_sja1105: convert to tagger-owned data") Signed-off-by: Vladimir Oltean <[email protected]> Reviewed-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Vladimir Oltean [Tue, 14 Dec 2021 01:45:34 +0000 (03:45 +0200)]
net: dsa: tag_sja1105: fix zeroization of ds->priv on tag proto disconnect
The method was meant to zeroize ds->tagger_data but got the wrong
pointer. Fix this.
Fixes: c79e84866d2a ("net: dsa: tag_sja1105: convert to tagger-owned data") Signed-off-by: Vladimir Oltean <[email protected]> Reviewed-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Jakub Kicinski [Tue, 14 Dec 2021 01:39:02 +0000 (17:39 -0800)]
ethtool: fix null-ptr-deref on ref tracker
dev can be a NULL here, not all requests set require_dev.
Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info") Signed-off-by: Jakub Kicinski <[email protected]> Reviewed-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
David S. Miller [Tue, 14 Dec 2021 12:28:25 +0000 (12:28 +0000)]
Merge branch 'hwtstamp_bonding'
Hangbin Liu says:
====================
net: add new hwtstamp flag HWTSTAMP_FLAG_BONDED_PHC_INDEX
This patchset add a new hwtstamp_config flag HWTSTAMP_FLAG_BONDED_PHC_INDEX.
When user want to get bond active interface's PHC, they need to add this flag
and aware the PHC index may changed.
v3: Use bitwise test to check the flags validation
v2: rename the flag to HWTSTAMP_FLAG_BONDED_PHC_INDEX
====================
Hangbin Liu [Fri, 10 Dec 2021 08:59:59 +0000 (16:59 +0800)]
Bonding: force user to add HWTSTAMP_FLAG_BONDED_PHC_INDEX when get/set HWTSTAMP
When there is a failover, the PHC index of bond active interface will be
changed. This may break the user space program if the author didn't aware.
By setting this flag, the user should aware that the PHC index get/set
by syscall is not stable. And the user space is able to deal with it.
Without this flag, the kernel will reject the request forwarding to
bonding.
Reported-by: Jakub Kicinski <[email protected]> Fixes: 94dd016ae538 ("bond: pass get_ts_info and SIOC[SG]HWTSTAMP ioctl to active device") Signed-off-by: Hangbin Liu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Hangbin Liu [Fri, 10 Dec 2021 08:59:58 +0000 (16:59 +0800)]
net_tstamp: add new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX
Since commit 94dd016ae538 ("bond: pass get_ts_info and SIOC[SG]HWTSTAMP
ioctl to active device") the user could get bond active interface's
PHC index directly. But when there is a failover, the bond active
interface will change, thus the PHC index is also changed. This may
break the user's program if they did not update the PHC timely.
This patch adds a new hwtstamp_config flag HWTSTAMP_FLAG_BONDED_PHC_INDEX.
When the user wants to get the bond active interface's PHC, they need to
add this flag and be aware the PHC index may be changed.
With the new flag. All flag checks in current drivers are removed. Only
the checking in net_hwtstamp_validate() is kept.
Lorenzo Bianconi [Mon, 13 Dec 2021 11:23:22 +0000 (12:23 +0100)]
net: mtk_eth: add COMPILE_TEST support
Improve the build testing of mtk_eth drivers by enabling them when
COMPILE_TEST is selected. Moreover COMPILE_TEST will be useful
for the driver development.
net: dev: Always serialize on Qdisc::busylock in __dev_xmit_skb() on PREEMPT_RT.
The root-lock is dropped before dev_hard_start_xmit() is invoked and after
setting the __QDISC___STATE_RUNNING bit. If the Qdisc owner is preempted
by another sender/task with a higher priority then this new sender won't
be able to submit packets to the NIC directly instead they will be
enqueued into the Qdisc. The NIC will remain idle until the Qdisc owner
is scheduled again and finishes the job.
By serializing every task on the ->busylock then the task will be
preempted by a sender only after the Qdisc has no owner.
Yang Li [Mon, 13 Dec 2021 09:54:13 +0000 (17:54 +0800)]
mt76: remove variable set but not used
The code that uses variable queued has been removed,
and "mt76_is_usb(dev) ? q->ndesc - q->queued : q->queued"
didn't do anything, so all they should be removed as well.
Eliminate the following clang warnings:
drivers/net/wireless/mediatek/mt76/debugfs.c:77:9: warning: variable
‘queued’ set but not used.
Reported-by: Abaci Robot <[email protected]> Fixes: 2d8be76c1674 ("mt76: debugfs: improve queue node readability") Signed-off-by: Yang Li <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Horatiu Vultur [Sat, 11 Dec 2021 21:44:20 +0000 (22:44 +0100)]
net: lan966x: Fix the configuration of the pcs
When inserting a SFP that runs at 2.5G, then the Serdes was still
configured to run at 1G. Because the config->speed was 0, and then the
speed of the serdes was not configured at all, it was using the default
value which is 1G. This patch stop calling the serdes function set_speed
and allow the serdes to figure out the speed based on the interface
type.
Fixes: d28d6d2e37d10d ("net: lan966x: add port module support") Signed-off-by: Horatiu Vultur <[email protected]> Signed-off-by: David S. Miller <[email protected]>
David S. Miller [Mon, 13 Dec 2021 14:15:41 +0000 (14:15 +0000)]
Merge branch 'mse102x-support'
Stefan Wahren says:
====================
add Vertexcom MSE102x support
This patch series adds support for the Vertexcom MSE102x Homeplug GreenPHY
chips [1]. They can be connected either via RGMII, RMII or SPI to a host CPU.
These patches handles only the last one, with an Ethernet over SPI protocol
driver.
The code has been tested only on Raspberry Pi boards, but should work
on other platforms.
Changes in V3:
- drop IF_PORT_HOMEPLUG again, since it's actually not used
Changes in V2:
- improve lock handling for RX & TX path
- add new patch to introduce IF_PORT_HOMEPLUG as suggested by Andrew Lunn
- address all the comments by Jakub Kicinski, Andrew Lunn, Kernel test robot
net: mvneta: mark as a legacy_pre_march2020 driver
mvneta provides mac_an_restart and mac_pcs_get_state methods, so needs
to be marked as a legacy driver. Marek spotted that mvneta had stopped
working in 2500base-X mode - thanks for reporting.
Jason Wang [Sun, 12 Dec 2021 07:12:04 +0000 (15:12 +0800)]
isdn: cpai: no need to initialise statics to 0
Static variables do not need to be initialised to 0, because compiler
will initialise all uninitialised statics to 0. Thus, remove the
unneeded initializations.
Alex Elder [Fri, 10 Dec 2021 22:31:23 +0000 (16:31 -0600)]
net: ipa: fix IPA v4.5 interconnect data
Update the definition of the IPA interconnects for IPA v4.5 so
the path between IPA and system memory is represented by a single
"memory" interconnect.
The first two interconnects defined for IPA on the SDX55 SoC are
really two parts of what should be represented as a single path
between IPA and system memory.
Fix this by combining the "memory-a" and "memory-b" interconnects
into a single "memory" interconnect.
Joanne Koong [Fri, 10 Dec 2021 20:40:23 +0000 (12:40 -0800)]
net: Enable max_dgram_qlen unix sysctl to be configurable by non-init user namespaces
This patch enables the "/proc/sys/net/unix/max_dgram_qlen" sysctl to be
exposed to non-init user namespaces. max_dgram_qlen is used as the default
"sk_max_ack_backlog" value for when a unix socket is created.
Currently, when a networking namespace is initialized, its unix sysctls
are exposed only if the user namespace that "owns" it is the init user
namespace. If there is an non-init user namespace that "owns" a networking
namespace (for example, in the case after we call clone() with both
CLONE_NEWUSER and CLONE_NEWNET set), the sysctls are hidden from view
and not configurable.
Exposing the unix sysctl is safe because any changes made to it will be
limited in scope to the networking namespace the non-init user namespace
"owns" and has privileges over (changes won't affect any other net
namespace). There is also no possibility of a non-privileged user namespace
messing up the net namespace sysctls it shares with its parent user namespace.
When a new user namespace is created without unsharing the network namespace
(eg calling clone() with CLONE_NEWUSER), the new user namespace shares its
parent's network namespace. Write access is protected by the mode set
in the sysctl's ctl_table (and enforced by procfs). Here in the case of
"max_dgram_qlen", 0644 is set; only the user owner has write access.
v1 -> v2:
* Add more detail to commit message, specify the
"/proc/sys/net/unix/max_dgram_qlen" sysctl in commit message.
u64_stats: Disable preemption on 32bit UP+SMP PREEMPT_RT during updates.
On PREEMPT_RT the seqcount_t for synchronisation is required on 32bit
architectures even on UP because the softirq (and the threaded IRQ handler) can
be preempted.
With the seqcount_t for synchronisation, a reader with higher priority can
preempt the writer and then spin endlessly in read_seqcount_begin() while the
writer can't make progress.
To avoid such a lock up on PREEMPT_RT the writer must disable preemption during
the update. There is no need to disable interrupts because no writer is using
this API in hard-IRQ context on PREEMPT_RT.
Disable preemption on 32bit-RT within the u64_stats write section.
David S. Miller [Mon, 13 Dec 2021 12:34:10 +0000 (12:34 +0000)]
Merge branch 'bareudp-remove-unused'
Guillaume Nault says:
====================
bareudp: Remove unused code from header file
Stop exporting unused functions and structures in bareudp.h. The only
piece of bareudp.h that is actually used is netif_is_bareudp(). The
rest can be moved to bareudp.c or even dropped entirely.
====================
Xiaoliang Yang [Wed, 8 Dec 2021 10:06:51 +0000 (18:06 +0800)]
net: stmmac: bump tc when get underflow error from DMA descriptor
In DMA threshold mode, frame underflow errors may sometimes occur when
the TC(threshold control) value is not enough. The TC value need to be
bumped up in this case.
There is no underflow interrupt bit on DMA_CH(#i)_Status of dwmac4, so
the DMA threshold cannot be bumped up in stmmac_dma_interrupt(). The
i.mx8mp board observed an underflow error while running NFS boot, the
NFS rootfs could not be mounted.
The underflow error can be got from the DMA descriptor TDES3 on dwmac4.
This patch bump up tc value once underflow error is got from TDES3.
David S. Miller [Sun, 12 Dec 2021 12:51:34 +0000 (12:51 +0000)]
Merge branch 'dsa-tagger-storage'
Vladimir Oltean says:
====================
Replace DSA dp->priv with tagger-owned storage
Ansuel's recent work on qca8k register access over Ethernet:
https://patchwork.kernel.org/project/netdevbpf/cover/20211207145942[email protected]/
has triggered me to do something which I should've done for a longer
time:
https://patchwork.kernel.org/project/netdevbpf/patch/20211109095013[email protected]/#24585521
which is to replace dp->priv with something that has less caveats.
The dp->priv was introduced when sja1105 needed to hold stateful
information in the tagging protocol driver. In that design, dp->priv
held memory allocated by the switch driver, because the tagging protocol
driver design was 100% stateless.
Some years have passed and others have started to feel the need for
stateful information kept by the tagger, as well as passing data back
and forth between the tagging protocol driver and the switch driver.
This isn't possible cleanly in DSA due to a circular dependency which
leads to broken module autoloading:
https://lore.kernel.org/netdev/20210908220834.d7gmtnwrorhharna@skbuf/
This patchset introduces a framework that resembles something normal,
which allows data to be passed from the tagging protocol driver (things
like switch management packets, which aren't intended for the network
stack) to the switch driver, while the tagging protocol still remains
more or less stateless. The overall design of the framework was
discussed with Ansuel too and it appears to be flexible enough to cover
the "register access over Ethernet" use case. Additionally, the existing
uses of dp->priv, which have mainly to do with PTP timestamping, have
also been migrated.
Changes in v2:
Fix transient build breakage in patch 5/11 due to a missing parenthesis,
https://patchwork.hopto.org/static/nipa/592567/12665213/build_clang/
and another transient build warning in patch 4/11 that for some reason
doesn't appear in my W=1 C=1 build.
https://patchwork.hopto.org/static/nipa/592567/12665209/build_clang/stderr
====================
Vladimir Oltean [Thu, 9 Dec 2021 23:34:47 +0000 (01:34 +0200)]
net: dsa: remove dp->priv
All current in-tree uses of dp->priv have been replaced with
ds->tagger_data, which provides for a safer API especially when the
connection isn't the regular 1:1 link between one switch driver and one
tagging protocol driver, but could be either one switch to many taggers,
or many switches to one tagger.
Vladimir Oltean [Thu, 9 Dec 2021 23:34:46 +0000 (01:34 +0200)]
net: dsa: tag_sja1105: split sja1105_tagger_data into private and public sections
The sja1105 driver messes with the tagging protocol's state when PTP RX
timestamping is enabled/disabled. This is fundamentally necessary
because the tagger needs to know what to do when it receives a PTP
packet. If RX timestamping is enabled, then a metadata follow-up frame
is expected, and this holds the (partial) timestamp. So the tagger plays
hide-and-seek with the network stack until it also gets the metadata
frame, and then presents a single packet, the timestamped PTP packet.
But when RX timestamping isn't enabled, there is no metadata frame
expected, so the hide-and-seek game must be turned off and the packet
must be delivered right away to the network stack.
Considering this, we create a pseudo isolation by devising two tagger
methods callable by the switch: one to get the RX timestamping state,
and one to set it. Since we can't export symbols between the tagger and
the switch driver, these methods are exposed through function pointers.
After this change, the public portion of the sja1105_tagger_data
contains only function pointers.
The above change was done to avoid calling symbols exported by the
switch driver from the tagging protocol driver.
With the tagger-owned storage model, we have a new option on our hands,
and that is for the switch driver to provide a data consumer handler in
the form of a function pointer inside the ->connect_tag_protocol()
method. Having a function pointer avoids the problems of the exported
symbols approach.
By creating a handler for metadata frames holding TX timestamps on
SJA1110, we are able to eliminate an skb queue from the tagger data, and
replace it with a simple, and stateless, function pointer. This skb
queue is now handled exclusively by sja1105_ptp.c, which makes the code
easier to follow, as it used to be before the reverted patch.
Vladimir Oltean [Thu, 9 Dec 2021 23:34:44 +0000 (01:34 +0200)]
net: dsa: tag_sja1105: convert to tagger-owned data
Currently, struct sja1105_tagger_data is a part of struct
sja1105_private, and is used by the sja1105 driver to populate dp->priv.
With the movement towards tagger-owned storage, the sja1105 driver
should not be the owner of this memory.
This change implements the connection between the sja1105 switch driver
and its tagging protocol, which means that sja1105_tagger_data no longer
stays in dp->priv but in ds->tagger_data, and that the sja1105 driver
now only populates the sja1105_port_deferred_xmit callback pointer.
The kthread worker is now the responsibility of the tagger.
The sja1105 driver also alters the tagger's state some more, especially
with regard to the PTP RX timestamping state. This will be fixed up a
bit in further changes.
Vladimir Oltean [Thu, 9 Dec 2021 23:34:43 +0000 (01:34 +0200)]
net: dsa: sja1105: move ts_id from sja1105_tagger_data
The TX timestamp ID is incremented by the SJA1110 PTP timestamping
callback (->port_tx_timestamp) for every packet, when cloning it.
It isn't used by the tagger at all, even though it sits inside the
struct sja1105_tagger_data.
Also, serialization to this structure is currently done through
tagger_data->meta_lock, which is a cheap hack because the meta_lock
isn't used for anything else on SJA1110 (sja1105_rcv_meta_state_machine
isn't called).
This change moves ts_id from sja1105_tagger_data to sja1105_private and
introduces a dedicated spinlock for it, also in sja1105_private.
Vladimir Oltean [Thu, 9 Dec 2021 23:34:42 +0000 (01:34 +0200)]
net: dsa: sja1105: make dp->priv point directly to sja1105_tagger_data
The design of the sja1105 tagger dp->priv is that each port has a
separate struct sja1105_port, and the sp->data pointer points to a
common struct sja1105_tagger_data.
We have removed all per-port members accessible by the tagger, and now
only struct sja1105_tagger_data remains. Make dp->priv point directly to
this.
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