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David S. Miller
39a096d67c Merge branch 'ravb-cleanups'
Niklas Söderlund says:

====================
ravb: Align Rx descriptor setup and maintenance

When RZ/G2L support was added the Rx code path was split in two, one to
support R-Car and one to support RZ/G2L. One reason for this is that
R-Car uses the extended Rx descriptor format, while RZ/G2L uses the
normal descriptor format.

In many aspects this is not needed as the extended descriptor format is
just a normal descriptor with extra metadata (timestamsp) appended. And
the R-Car SoCs can also use normal descriptors if hardware timestamps
were not desired. This split has led to RZ/G2L gaining support for
split descriptors in the Rx path while R-Car still lacks this.

This series is the first step in trying to merge the R-Car and RZ/G2L Rx
paths so features and bugs corrected in one will benefit the other.

The first patch in the series clarifies that the driver now supports
either normal or extended descriptors, not both at the same time by
grouping them in a union. This is the foundation that later patches will
build on the aligning the two Rx paths.

Patches 2-5 deals with correcting small issues in the Rx frame and
descriptor sizes that either were incorrect at the time they were added
in 2017 (my bad) or concepts built on-top of this initial incorrect
design.

While finally patch 6 merges the R-Car and RZ/G2L for Rx descriptor
setup and maintenance.

When this work has landed I plan to follow up with more work aligning
the rest of the Rx code paths and hopefully bring split descriptor
support to the R-Car SoCs.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
Niklas Söderlund
644d037b2c ravb: Unify Rx ring maintenance code paths
The R-Car and RZ/G2L Rx code paths were split in two separate
implementations when support for RZ/G2L was added due to the fact that
R-Car uses the extended descriptor format while RZ/G2L uses normal
descriptors. This has led to a duplication of Rx logic with the only
difference being the different Rx descriptors types used. The
implementation however neglects to take into account that extended
descriptors are normal descriptors with additional metadata at the end
to carry hardware timestamp information.

The hardware timestamp information is only consumed in the R-Car Rx
loop and all the maintenance code around the Rx ring can be shared
between the two implementations if the difference in descriptor length
is carefully considered.

This change merges the two implementations for Rx ring maintenance by
adding a method to access both types of descriptors as normal
descriptors, as this part covers all the fields needed for Rx ring
maintenance the only difference between using normal or extended
descriptor is the size of the memory region to allocate/free and the
step size between each descriptor in the ring.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
Niklas Söderlund
555419b225 ravb: Move maximum Rx descriptor data usage to info struct
To make it possible to merge the R-Car and RZ/G2L code paths move the
maximum usable size of a single Rx descriptor data slice into the
hardware information instead of using two different defines in the two
different code paths.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
Niklas Söderlund
4968633881 ravb: Use the max frame size from hardware info for RZ/G2L
Remove the define describing the RZ/G2L maximum frame size and only use
the information in the hardware information struct. This will make it
easier to merge the R-Car and RZ/G2L code paths.

There is no functional change as both the define and the maximum frame
length in the hardware information is set to 8K.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
Niklas Söderlund
cfbad64706 ravb: Create helper to allocate skb and align it
The EtherAVB device requires the SKB data to be aligned to 128 bytes.
The alignment is done by allocating an skb 128 bytes larger than the
maximum frame size supported by the device and adjusting the headroom to
fit the requirement.

This code has been refactored a few times and small issues have been
added along the way. The issues are not harmful but prevent merging
parts of the Rx code which have been split in two implementations with
the addition of RZ/G2L support, a device that supports larger frame
sizes.

This change removes the need for duplicated and somewhat inaccurate
hardware alignment constrains stored in the hardware information struct
by creating a helper to handle the allocation of an skb and alignment of
an skb data.

For the R-Car class of devices the maximum frame size is 4K and each
descriptor is limited to 2K of data. The current implementation does not
support split descriptors, this limits the frame size to 2K. The
current hardware information however records the descriptor size just
under 2K due to bad understanding of the device when larger MTUs where
added.

For the RZ/G2L device the maximum frame size is 8K and each descriptor
is limited to 4K of data. The current hardware information records this
correctly, but it gets the alignment constrains wrong as just aligns it
by 128, it does not extend it by 128 bytes to allow the full frame to be
stored. This works because the RZ/G2L device supports split descriptors
and allocates each skb to 8K and aligns each 4K descriptor in this
space.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
Niklas Söderlund
e82700b866 ravb: Make it clear the information relates to maximum frame size
The struct member rx_max_buf_size was added before split descriptor
support was added. It is unclear if the value describes the full skb
frame buffer or the data descriptor buffer which can be combined into a
single skb.

Rename it to make it clear it referees to the maximum frame size and can
cover multiple descriptors.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
Niklas Söderlund
4123c3fbf8 ravb: Group descriptor types used in Rx ring
The Rx ring can either be made up of normal or extended descriptors, not
a mix of the two at the same time. Make this explicit by grouping the
two variables in a rx_ring union.

The extension of the storage for more than one queue of normal
descriptors from a single to NUM_RX_QUEUE queues have no practical
effect. But aids in making the code readable as the code that uses it
already piggyback on other members of struct ravb_private that are
arrays of max length NUM_RX_QUEUE, e.g. rx_desc_dma. This will also make
further refactoring easier.

While at it, rename the normal descriptor Rx ring to make it clear it's
not strictly related to the GbEthernet E-MAC IP found in RZ/G2L, normal
descriptors could be used on R-Car SoCs too.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 11:23:21 +00:00
David S. Miller
dbb0b6ca7d Merge branch '200GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
From: Tony Nguyen <anthony.l.nguyen@intel.com>
To: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com,
	edumazet@google.com, netdev@vger.kernel.org
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>, alan.brady@intel.com
Tony Nguyen says:

====================
idpf: refactor virtchnl messages

Alan Brady says:

The motivation for this series has two primary goals. We want to enable
support of multiple simultaneous messages and make the channel more
robust. The way it works right now, the driver can only send and receive
a single message at a time and if something goes really wrong, it can
lead to data corruption and strange bugs.

To start the series, we introduce an idpf_virtchnl.h file. This reduces
the burden on idpf.h which is overloaded with struct and function
declarations.

The conversion works by conceptualizing a send and receive as a
"virtchnl transaction" (idpf_vc_xn) and introducing a "transaction
manager" (idpf_vc_xn_manager). The vcxn_mngr will init a ring of
transactions from which the driver will pop from a bitmap of free
transactions to track in-flight messages. Instead of needing to handle a
complicated send/recv for every a message, the driver now just needs to
fill out a xn_params struct and hand it over to idpf_vc_xn_exec which
will take care of all the messy bits. Once a message is sent and
receives a reply, we leverage the completion API to signal the received
buffer is ready to be used (assuming success, or an error code
otherwise).

At a low-level, this implements the "sw cookie" field of the virtchnl
message descriptor to enable this. We have 16 bits we can put whatever
we want and the recipient is required to apply the same cookie to the
reply for that message.  We use the first 8 bits as an index into the
array of transactions to enable fast lookups and we use the second 8
bits as a salt to make sure each cookie is unique for that message. As
transactions are received in arbitrary order, it's possible to reuse a
transaction index and the salt guards against index conflicts to make
certain the lookup is correct. As a primitive example, say index 1 is
used with salt 1. The message times out without receiving a reply so
index 1 is renewed to be ready for a new transaction, we report the
timeout, and send the message again. Since index 1 is free to be used
again now, index 1 is again sent but now salt is 2. This time we do get
a reply, however it could be that the reply is _actually_ for the
previous send index 1 with salt 1.  Without the salt we would have no
way of knowing for sure if it's the correct reply, but with we will know
for certain.

Through this conversion we also get several other benefits. We can now
more appropriately handle asynchronously sent messages by providing
space for a callback to be defined. This notably allows us to handle MAC
filter failures better; previously we could potentially have stale,
failed filters in our list, which shouldn't really have a major impact
but is obviously not correct. I also managed to remove fairly
significant more lines than I added which is a win in my book.

Additionally, this converts some variables to use auto-variables where
appropriate. This makes the alloc paths much cleaner and less prone to
memory leaks. We also fix a few virtchnl related bugs while we're here.

====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 10:30:08 +00:00
David S. Miller
f287d6aafd Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2024-03-05 (idpf, ice, i40e, igc, e1000e)

This series contains updates to idpf, ice, i40e, igc and e1000e drivers.

Emil disables local BH on NAPI schedule for proper handling of softirqs
on idpf.

Jake stops reporting of virtchannel RSS option which in unsupported on
ice.

Rand Deeb adds null check to prevent possible null pointer dereference
on ice.

Michal Schmidt moves DPLL mutex initialization to resolve uninitialized
mutex usage for ice.

Jesse fixes incorrect variable usage for calculating Tx stats on ice.

Ivan Vecera corrects logic for firmware equals check on i40e.

Florian Kauer prevents memory corruption for XDP_REDIRECT on igc.

Sasha reverts an incorrect use of FIELD_GET which caused a regression
for Wake on LAN on e1000e.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 10:28:02 +00:00
Geert Uytterhoeven
ccabbb6768 pmdomain: renesas: rcar-gen4-sysc: Reduce atomic delays
The delays used with the various atomic polling loops are already at the
maximum value of ~10µs, as documented for read_poll_timeout_atomic().
Hence reduce the delays from 10 to 1 µs.  Increase PDRESR_RETRIES
accordingly, to retain the old (generous) timeout value.

Measurements on R-Car V3U, S4, V4H, and V4M show that the first three
polling loops rarely (never?) loop, so the actual delay does not matter.
The fourth loop (for SYSCISCR in rcar_gen4_sysc_power()) typically ran
for one or two cycles with the old delay.  With the reduced delay, it
typically runs for two to 17 cycles, and finishes earlier than before,
which can reduce loop time up to a factor of three.

While at it, rename the SYSCISR_{TIMEOUT,DELAY_US} definitions to
SYSCISCR_{TIMEOUT,DELAY_US}, to match the register name they apply to.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/77f150522096d55c6da0ff983db61e0cf6309344.1709317289.git.geert+renesas@glider.be
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2024-03-06 11:25:27 +01:00
Kemeng Shi
efc4105a4c fuse: remove unneeded lock which protecting update of congestion_threshold
Commit 670d21c6e1 ("fuse: remove reliance on bdi congestion") change how
congestion_threshold is used and lock in
fuse_conn_congestion_threshold_write is not needed anymore.
1. Access to supe_block is removed along with removing of bdi congestion.
Then down_read(&fc->killsb) which protecting access to super_block is no
needed.
2. Compare num_background and congestion_threshold without holding
bg_lock. Then there is no need to hold bg_lock to update
congestion_threshold.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 11:07:51 +01:00
Lei Huang
738adade96 fuse: Fix missing FOLL_PIN for direct-io
Our user space filesystem relies on fuse to provide POSIX interface.
In our test, a known string is written into a file and the content
is read back later to verify correct data returned. We observed wrong
data returned in read buffer in rare cases although correct data are
stored in our filesystem.

Fuse kernel module calls iov_iter_get_pages2() to get the physical
pages of the user-space read buffer passed in read(). The pages are
not pinned to avoid page migration. When page migration occurs, the
consequence are two-folds.

1) Applications do not receive correct data in read buffer.
2) fuse kernel writes data into a wrong place.

Using iov_iter_extract_pages() to pin pages fixes the issue in our
test.

An auxiliary variable "struct page **pt_pages" is used in the patch
to prepare the 2nd parameter for iov_iter_extract_pages() since
iov_iter_get_pages2() uses a different type for the 2nd parameter.

[SzM] add iov_iter_extract_will_pin(ii) and unpin only if true.

Signed-off-by: Lei Huang <lei.huang@linux.intel.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 11:07:35 +01:00
Linus Torvalds
a50026bdb8
iov_iter: get rid of 'copy_mc' flag
This flag is only set by one single user: the magical core dumping code
that looks up user pages one by one, and then writes them out using
their kernel addresses (by using a BVEC_ITER).

That actually ends up being a huge problem, because while we do use
copy_mc_to_kernel() for this case and it is able to handle the possible
machine checks involved, nothing else is really ready to handle the
failures caused by the machine check.

In particular, as reported by Tong Tiangen, we don't actually support
fault_in_iov_iter_readable() on a machine check area.

As a result, the usual logic for writing things to a file under a
filesystem lock, which involves doing a copy with page faults disabled
and then if that fails trying to fault pages in without holding the
locks with fault_in_iov_iter_readable() does not work at all.

We could decide to always just make the MC copy "succeed" (and filling
the destination with zeroes), and that would then create a core dump
file that just ignores any machine checks.

But honestly, this single special case has been problematic before, and
means that all the normal iov_iter code ends up slightly more complex
and slower.

See for example commit c9eec08bac ("iov_iter: Don't deal with
iter->copy_mc in memcpy_from_iter_mc()") where David Howells
re-organized the code just to avoid having to check the 'copy_mc' flags
inside the inner iov_iter loops.

So considering that we have exactly one user, and that one user is a
non-critical special case that doesn't actually ever trigger in real
life (Tong found this with manual error injection), the sane solution is
to just decide that the onus on handling the machine check lines on that
user instead.

Ergo, do the copy_mc_to_kernel() in the core dump logic itself, copying
the user data to a stable kernel page before writing it out.

Fixes: f1982740f5 ("iov_iter: Convert iterate*() to inline funcs")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
Link: https://lore.kernel.org/r/20240305133336.3804360-1-tongtiangen@huawei.com
Link: https://lore.kernel.org/all/4e80924d-9c85-f13a-722a-6a5d2b1c225a@huawei.com/
Tested-by: David Howells <dhowells@redhat.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reported-by: Tong Tiangen <tongtiangen@huawei.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-03-06 10:52:12 +01:00
Steffen Klassert
2ce0eae694 Merge branch 'Improve packet offload for dual stack'
Mike Yu says:
====================
In the XFRM stack, whether a packet is forwarded to the IPv4
or IPv6 stack depends on the family field of the matched SA.
This does not completely work for IPsec packet offload in some
scenario, for example, sending an IPv6 packet that will be
encrypted and encapsulated as an IPv4 packet in HW.

Here are the patches to make IPsec packet offload work on the
mentioned scenario.
====================

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2024-03-06 10:33:24 +01:00
Dan Carpenter
bd17b7c34f RAS/AMD/FMPM: Fix off by one when unwinding on error
Decrement the index variable i before the first iteration when freeing
the remaining elements on error. Depending on where this fails it could
free something from one element beyond the end of the fru_records[]
array.

  [ bp: Massage commit message. ]

Fixes: 6f15e617cc ("RAS: Introduce a FRU memory poison manager")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/6fdec71a-846b-4cd0-af69-e5f6cd12f4f6@moroto.mountain
2024-03-06 10:22:19 +01:00
Thomas Weißschuh
774a86f1c8 x86/nmi: Drop unused declaration of proc_nmi_enabled()
The declaration is unused as the definition got deleted.

Fixes: 5f2b0ba4d9 ("x86, nmi_watchdog: Remove the old nmi_watchdog").
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240306-const-sysctl-prep-x86-v1-1-f9d1fa38dd2b@weissschuh.net
2024-03-06 10:13:33 +01:00
Jiachen Zhang
8a5fb18643 fuse: remove an unnecessary if statement
FUSE remote locking code paths never add any locking state to
inode->i_flctx, so the locks_remove_posix() function called on
file close will return without calling fuse_setlk().

Therefore, as the if statement to be removed in this commit will
always be false, remove it for clearness.

Signed-off-by: Jiachen Zhang <zhangjiachen.jaycee@bytedance.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:54 +01:00
Zhou Jifeng
2e3f7dd08d fuse: Track process write operations in both direct and writethrough modes
Due to the fact that fuse does not count the write IO of processes in the
direct and writethrough write modes, user processes cannot track
write_bytes through the “/proc/[pid]/io” path. For example, the system
tool iotop cannot count the write operations of the corresponding process.

Signed-off-by: Zhou Jifeng <zhoujifeng@kylinos.com.cn>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:35 +01:00
Zhao Chen
9e7f5296f4 fuse: Use the high bit of request ID for indicating resend requests
Some FUSE daemons want to know if the received request is a resend
request. The high bit of the fuse request ID is utilized for indicating
this, enabling the receiver to perform appropriate handling.

The init flag "FUSE_HAS_RESEND" is added to indicate this feature.

Signed-off-by: Zhao Chen <winters.zc@antgroup.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:35 +01:00
Zhao Chen
760eac73f9 fuse: Introduce a new notification type for resend pending requests
When a FUSE daemon panics and failover, we aim to minimize the impact on
applications by reusing the existing FUSE connection. During this process,
another daemon is employed to preserve the FUSE connection's file
descriptor. The new started FUSE Daemon will takeover the fd and continue
to provide service.

However, it is possible for some inflight requests to be lost and never
returned. As a result, applications awaiting replies would become stuck
forever. To address this, we can resend these pending requests to the
new started FUSE daemon.

This patch introduces a new notification type "FUSE_NOTIFY_RESEND", which
can trigger resending of the pending requests, ensuring they are properly
processed again.

Signed-off-by: Zhao Chen <winters.zc@antgroup.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:34 +01:00
Jingbo Xu
e022f6a1c7 fuse: add support for explicit export disabling
open_by_handle_at(2) can fail with -ESTALE with a valid handle returned
by a previous name_to_handle_at(2) for evicted fuse inodes, which is
especially common when entry_valid_timeout is 0, e.g. when the fuse
daemon is in "cache=none" mode.

The time sequence is like:

	name_to_handle_at(2)	# succeed
	evict fuse inode
	open_by_handle_at(2)	# fail

The root cause is that, with 0 entry_valid_timeout, the dput() called in
name_to_handle_at(2) will trigger iput -> evict(), which will send
FUSE_FORGET to the daemon.  The following open_by_handle_at(2) will send
a new FUSE_LOOKUP request upon inode cache miss since the previous inode
eviction.  Then the fuse daemon may fail the FUSE_LOOKUP request with
-ENOENT as the cached metadata of the requested inode has already been
cleaned up during the previous FUSE_FORGET.  The returned -ENOENT is
treated as -ESTALE when open_by_handle_at(2) returns.

This confuses the application somehow, as open_by_handle_at(2) fails
when the previous name_to_handle_at(2) succeeds.  The returned errno is
also confusing as the requested file is not deleted and already there.
It is reasonable to fail name_to_handle_at(2) early in this case, after
which the application can fallback to open(2) to access files.

Since this issue typically appears when entry_valid_timeout is 0 which
is configured by the fuse daemon, the fuse daemon is the right person to
explicitly disable the export when required.

Also considering FUSE_EXPORT_SUPPORT actually indicates the support for
lookups of "." and "..", and there are existing fuse daemons supporting
export without FUSE_EXPORT_SUPPORT set, for compatibility, we add a new
INIT flag for such purpose.

Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:34 +01:00
Alexander Mikhalitsyn
5a4d888e9f fuse: __kuid_val/__kgid_val helpers in fuse_fill_attr_from_inode()
For the sake of consistency, let's use these helpers to extract
{u,g}id_t values from k{u,g}id_t ones.

There are no functional changes, just to make code cleaner.

Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:25 +01:00
Alexander Mikhalitsyn
2d09ab2203 fuse: fix typo for fuse_permission comment
Found by chance while working on support for idmapped mounts in fuse.

Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-03-06 09:56:11 +01:00
David S. Miller
784ee615af Merge branch 'netlink-emsgsize'
Jakub Kicinski says:

====================
netlink: handle EMSGSIZE errors in the core

Ido discovered some time back that we usually force NLMSG_DONE
to be delivered in a separate recv() syscall, even if it would
fit into the same skb as data messages. He made nexthop try
to fit DONE with data in commit 8743aeff5b ("nexthop: Fix
infinite nexthop bucket dump when using maximum nexthop ID"),
and nobody has complained so far.

We have since also tried to follow the same pattern in new
genetlink families, but explaining to people, or even remembering
the correct handling ourselves is tedious.

Let the netlink socket layer consume -EMSGSIZE errors.
Practically speaking most families use this error code
as "dump needs more space", anyway.

v2:
 - init err to 0 in last patch
v1: https://lore.kernel.org/all/20240301012845.2951053-1-kuba@kernel.org/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 08:07:45 +00:00
Jakub Kicinski
87d381973e genetlink: fit NLMSG_DONE into same read() as families
Make sure ctrl_fill_info() returns sensible error codes and
propagate them out to netlink core. Let netlink core decide
when to return skb->len and when to treat the exit as an
error. Netlink core does better job at it, if we always
return skb->len the core doesn't know when we're done
dumping and NLMSG_DONE ends up in a separate read().

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 08:07:45 +00:00
Jakub Kicinski
0b11b1c5c3 netdev: let netlink core handle -EMSGSIZE errors
Previous change added -EMSGSIZE handling to af_netlink, we don't
have to hide these errors any longer.

Theoretically the error handling changes from:
 if (err == -EMSGSIZE)
to
 if (err == -EMSGSIZE && skb->len)

everywhere, but in practice it doesn't matter.
All messages fit into NLMSG_GOODSIZE, so overflow of an empty
skb cannot happen.

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 08:07:44 +00:00
Jakub Kicinski
b5a899154a netlink: handle EMSGSIZE errors in the core
Eric points out that our current suggested way of handling
EMSGSIZE errors ((err == -EMSGSIZE) ? skb->len : err) will
break if we didn't fit even a single object into the buffer
provided by the user. This should not happen for well behaved
applications, but we can fix that, and free netlink families
from dealing with that completely by moving error handling
into the core.

Let's assume from now on that all EMSGSIZE errors in dumps are
because we run out of skb space. Families can now propagate
the error nla_put_*() etc generated and not worry about any
return value magic. If some family really wants to send EMSGSIZE
to user space, assuming it generates the same error on the next
dump iteration the skb->len should be 0, and user space should
still see the EMSGSIZE.

This should simplify families and prevent mistakes in return
values which lead to DONE being forced into a separate recv()
call as discovered by Ido some time ago.

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 08:07:44 +00:00
Linus Walleij
52279c3d50 pinctrl: aw9523: Add proper terminator
The of_device_id array needs to be terminated with a NULL
entry.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403061147.85XYVsk3-lkp@intel.com/
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240306-fix-aw9523-terminator-v1-1-13f90f87a7f6@linaro.org
2024-03-06 08:56:24 +01:00
Arnd Bergmann
049238d244 A few Qualcomm driver fixes for v6.9
This fixes a "defined but not used"-warning in SPM driver when kernel is
 built without regulator support, and corrects a couple of kernel-doc
 issues in aoss and geni-se drivers.
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Merge tag 'qcom-drivers-for-6.9-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers

A few Qualcomm driver fixes for v6.9

This fixes a "defined but not used"-warning in SPM driver when kernel is
built without regulator support, and corrects a couple of kernel-doc
issues in aoss and geni-se drivers.

* tag 'qcom-drivers-for-6.9-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  soc: qcom: aoss: add missing kerneldoc for qmp members
  soc: qcom: geni-se: drop unused kerneldoc struct geni_wrapper param
  soc: qcom: spm: fix building with CONFIG_REGULATOR=n

Link: https://lore.kernel.org/r/20240306032120.5036-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-03-06 07:43:46 +01:00
Arnd Bergmann
ce04864176 A few Qualcomm Arm64 DeviceTree fixes for v6.9
This corrects the orientation of the panel of Xiaomi Pad 5 Pro, and
 corrects a typo in the size of the SPMI channel register size in both
 SM8550 and SM8650.
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Merge tag 'qcom-arm64-for-6.9-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/dt

A few Qualcomm Arm64 DeviceTree fixes for v6.9

This corrects the orientation of the panel of Xiaomi Pad 5 Pro, and
corrects a typo in the size of the SPMI channel register size in both
SM8550 and SM8650.

* tag 'qcom-arm64-for-6.9-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  arm64: dts: qcom: sm8250-xiaomi-elish: set rotation
  arm64: dts: qcom: sm8650: Fix SPMI channels size
  arm64: dts: qcom: sm8550: Fix SPMI channels size

Link: https://lore.kernel.org/r/20240306031451.4545-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-03-06 07:42:45 +01:00
Arnd Bergmann
1c7cfb6158 RISC-V firmware drivers for v6.9
A single minor fix for an oversized allocation due to sizeof() misuse by
 yours truly that came in since I sent my last fixes PR.
 
 Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
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Merge tag 'riscv-firmware-for-v6.9' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into arm/fixes

RISC-V firmware drivers for v6.9

A single minor fix for an oversized allocation due to sizeof() misuse by
yours truly that came in since I sent my last fixes PR.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

* tag 'riscv-firmware-for-v6.9' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux:
  firmware: microchip: Fix over-requested allocation size

Link: https://lore.kernel.org/r/20240305-vicinity-dumpling-8943ef26f004@spud
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-03-06 07:42:08 +01:00
Arnd Bergmann
ee7dad0b81 RISC-V Devicetrees for v6.9
Microchip:
 Missing bus clocks for the CAN controllers spotted during the creation
 of a driver for the controllers and a specific compatible for the SiFive
 PDMA block on PolarFire SoC.
 
 Starfive:
 PWM nodes for the jh7100 and jh7110. Camera subsystem support for the
 latter. Most notably however is the addition of ethernet support for the
 jh7110 which finally allows people to use the network on the OG VisionFive
 and on the Beagle-V Starlight board. This was made possible by the
 non-standard cache management operations support added for the RZ/Five
 which could be extended to the ccache present on the jh7100.
 
 bindings:
 Additional clarification for what the reg property represents for cpus
 and two opencores PWM binding changes - the original addition and an
 added compatible. The latter is here as the driver patch was not ready
 but the PWM maintainer told me to go ahead and merge it.
 
 Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
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Merge tag 'riscv-dt-for-v6.9' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into soc/late

RISC-V Devicetrees for v6.9

Microchip:
Missing bus clocks for the CAN controllers spotted during the creation
of a driver for the controllers and a specific compatible for the SiFive
PDMA block on PolarFire SoC.

Starfive:
PWM nodes for the jh7100 and jh7110. Camera subsystem support for the
latter. Most notably however is the addition of ethernet support for the
jh7110 which finally allows people to use the network on the OG VisionFive
and on the Beagle-V Starlight board. This was made possible by the
non-standard cache management operations support added for the RZ/Five
which could be extended to the ccache present on the jh7100.

bindings:
Additional clarification for what the reg property represents for cpus
and two opencores PWM binding changes - the original addition and an
added compatible. The latter is here as the driver patch was not ready
but the PWM maintainer told me to go ahead and merge it.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

* tag 'riscv-dt-for-v6.9' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux:
  riscv: dts: starfive: jh7110: Add camera subsystem nodes
  dt-bindings: pwm: opencores: Add compatible for StarFive JH8100
  dt-bindings: riscv: cpus: reg matches hart ID
  riscv: dts: microchip: add specific compatible for mpfs pdma
  riscv: dts: microchip: add missing CAN bus clocks
  riscv: dts: starfive: beaglev-starlight: Setup phy reset gpio
  riscv: dts: starfive: visionfive-v1: Setup ethernet phy
  riscv: dts: starfive: jh7100-common: Setup pinmux and enable gmac
  riscv: dts: starfive: jh7100: Add sysmain and gmac DT nodes
  riscv: dts: starfive: jh7110: Add PWM node and pins configuration
  riscv: dts: starfive: jh7100: Add PWM node and pins configuration
  dt-bindings: pwm: Add bindings for OpenCores PWM Controller

Link: https://lore.kernel.org/r/20240305-iodine-moneywise-53797ae9bf6e@spud
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-03-06 07:40:29 +01:00
Arnd Bergmann
415ba4ed59 A few more Qualcomm Arm64 DeviceTree fixes for v6.8
This reduces the link speed of the PCIe bus with WiFi-card connected on the
 Lenovo ThinkPad X13s and the Qualcomm Compute Reference Device, avoid
 link errors and initialization issues reported by users.
 
 It also reverts the enablement of MPM on MSM8996, which is reported to
 prevent boards on this platform from booting for some users.
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Merge tag 'qcom-arm64-fixes-for-6.8-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into arm/fixes

A few more Qualcomm Arm64 DeviceTree fixes for v6.8

This reduces the link speed of the PCIe bus with WiFi-card connected on the
Lenovo ThinkPad X13s and the Qualcomm Compute Reference Device, avoid
link errors and initialization issues reported by users.

It also reverts the enablement of MPM on MSM8996, which is reported to
prevent boards on this platform from booting for some users.

* tag 'qcom-arm64-fixes-for-6.8-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  Revert "arm64: dts: qcom: msm8996: Hook up MPM"
  arm64: dts: qcom: sc8280xp-x13s: limit pcie4 link speed
  arm64: dts: qcom: sc8280xp-crd: limit pcie4 link speed

Link: https://lore.kernel.org/r/20240306031208.4218-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-03-06 07:24:01 +01:00
Pierre Gondois
ad2a91086e cpufreq: scmi: Set transition_delay_us
Make use of the newly added callbacks:
- rate_limit_get()
- fast_switch_rate_limit()
to populate policies's `transition_delay_us`, defined as the
'Preferred average time interval between consecutive
invocations of the driver to set the frequency for this policy.'

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-03-06 10:54:24 +05:30
Pierre Gondois
2441caa84a firmware: arm_scmi: Populate fast channel rate_limit
Arm SCMI spec. v3.2, s4.5.3.12 PERFORMANCE_DESCRIBE_FASTCHANNEL
defines a per-domain rate_limit for performance requests:
"""
Rate Limit in microseconds, indicating the minimum time
required between successive requests. A value of 0
indicates that this field is not applicable or supported
on the platform.
""""
The field is first defined in SCMI v2.0.

Add support to fetch this value and advertise it through
a fast_switch_rate_limit() callback.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-03-06 10:54:21 +05:30
Pierre Gondois
ad86f7e959 firmware: arm_scmi: Populate perf commands rate_limit
Arm SCMI spec. v3.2, s4.5.3.4 PERFORMANCE_DOMAIN_ATTRIBUTES
defines a per-domain rate_limit for performance requests:
"""
Rate Limit in microseconds, indicating the minimum time
required between successive requests. A value of 0
indicates that this field is not supported by the
platform. This field does not apply to FastChannels.
""""
The field is first defined in SCMI v1.0.

Add support to fetch this value and advertise it through
a rate_limit_get() callback.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-03-06 10:54:15 +05:30
Sibi Sankar
62210f7509 remoteproc: qcom_q6v5_pas: Unload lite firmware on ADSP
The UEFI loads a lite variant of the ADSP firmware to support charging
use cases. The kernel needs to unload and reload it with the firmware
that has full feature support for audio. This patch arbitarily shutsdown
the lite firmware before loading the full firmware.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20240212-x1e80100-remoteproc-v2-3-604614367f38@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:02:07 -08:00
Sibi Sankar
1d7823f286 remoteproc: qcom_q6v5_pas: Add support for X1E80100 ADSP/CDSP
Add support for PIL loading on ADSP and CDSP on X1E80100 SoCs.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20240212-x1e80100-remoteproc-v2-2-604614367f38@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:02:07 -08:00
Abel Vesa
9e93276d66 dt-bindings: remoteproc: qcom,sm8550-pas: document the X1E80100 aDSP & cDSP
Document the aDSP and cDSP Peripheral Authentication Service on the
X1E80100 Platform.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20240212-x1e80100-remoteproc-v2-1-604614367f38@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:02:07 -08:00
Andrew Davis
cebaa386d5 hwspinlock: omap: Use index to get hwspinlock pointer
For loops with multiple initializers and increments are hard to read
and reason about, simplify this by using the looping index to index
into the hwspinlock array.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240208165114.63148-4-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:01:14 -08:00
Andrew Davis
8781ec8779 hwspinlock: omap: Use devm_hwspin_lock_register() helper
This will unregister the HW spinlock on module exit automatically for us,
currently we manually unregister which can be error-prone if not done in
the right order. This also allows us to remove the remove callback.
Do that here.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240208165114.63148-3-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:01:14 -08:00
Andrew Davis
25f7d74d45 hwspinlock: omap: Use devm_pm_runtime_enable() helper
This disables runtime PM on module exit automatically for us, currently
we manually disable runtime PM which can be error-prone if not done
in the right order or missed in some exit path. This also allows us
to simplify the probe exit path and remove callbacks. Do that here.

While here, as we can now return right after registering our hwspinlock,
simply return directly and remove the extra debug message.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240208165114.63148-2-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:01:14 -08:00
Andrew Davis
19856a07e5 hwspinlock: omap: Remove unneeded check for OF node
We do not use the OF node anymore, nor does it matter how
we got to probe, so remove the check for of_node.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240208165114.63148-1-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:01:14 -08:00
Andrew Davis
c92ab8aaf4 remoteproc: qcom_wcnss: Use devm_rproc_alloc() helper
Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting to
free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240123184632.725054-7-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:00:04 -08:00
Andrew Davis
41854ea92b remoteproc: qcom_q6v5_wcss: Use devm_rproc_alloc() helper
Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting to
free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240123184632.725054-6-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:00:04 -08:00
Andrew Davis
35049a98a4 remoteproc: qcom_q6v5_pas: Use devm_rproc_alloc() helper
Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting to
free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240123184632.725054-5-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:00:04 -08:00
Andrew Davis
2f09fa9f7a remoteproc: qcom_q6v5_mss: Use devm_rproc_alloc() helper
Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting to
free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240123184632.725054-4-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:00:04 -08:00
Andrew Davis
5789e877b9 remoteproc: qcom_q6v5_adsp: Use devm_rproc_alloc() helper
Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting to
free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240123184632.725054-3-afd@ti.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 20:00:03 -08:00
Krzysztof Kozlowski
506355c577 dt-bindings: remoteproc: do not override firmware-name $ref
dtschema package defines firmware-name as string-array, so individual
bindings should not make it a string but instead just narrow the number
of expected firmware file names.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240115182031.1610088-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 19:58:18 -08:00
Krzysztof Kozlowski
9023bd9b8a dt-bindings: remoteproc: qcom,glink-rpm-edge: drop redundant type from label
dtschema defines label as string, so $ref in other bindings is
redundant.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240226122854.86197-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2024-03-05 19:51:12 -08:00