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daddr can be NULL if there is no neighbour table entry present,
in that case the tx packet should be dropped.
saddr will usually be set by MCTP core, but check for NULL in case a
packet is transmitted by a different protocol.
Fixes: f5b8abf9fc3d ("mctp i2c: MCTP I2C binding driver")
Cc: [email protected]
Reported-by: Dung Cao <[email protected]>
Signed-off-by: Matt Johnston <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/20241022-mctp-i2c-null-dest-v3-1-e929709956c5@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <[email protected]>
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asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.
auto-generated by the following:
for i in `git grep -l -w asm/unaligned.h`; do
sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty / serial driver updates from Greg KH:
"Here is the "big" set of tty/serial driver updates for 6.12-rc1.
Nothing major in here, just nice forward progress in the slow cleanup
of the serial apis, and lots of other driver updates and fixes.
Included in here are:
- serial api updates from Jiri to make things more uniform and sane
- 8250_platform driver cleanups
- samsung serial driver fixes and updates
- qcom-geni serial driver fixes from Johan for the bizarre UART
engine that that chip seems to have. Hopefully it's in a better
state now, but hardware designers still seem to come up with more
ways to make broken UARTS 40+ years after this all should have
finished.
- sc16is7xx driver updates
- omap 8250 driver updates
- 8250_bcm2835aux driver updates
- a few new serial driver bindings added
- other serial minor driver updates
All of these have been in linux-next for a long time with no reported
problems"
* tag 'tty-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (65 commits)
tty: serial: samsung: Fix serial rx on Apple A7-A9
tty: serial: samsung: Fix A7-A11 serial earlycon SError
tty: serial: samsung: Use bit manipulation macros for APPLE_S5L_*
tty: rp2: Fix reset with non forgiving PCIe host bridges
serial: 8250_aspeed_vuart: Enable module autoloading
serial: qcom-geni: fix polled console corruption
serial: qcom-geni: disable interrupts during console writes
serial: qcom-geni: fix console corruption
serial: qcom-geni: introduce qcom_geni_serial_poll_bitfield()
serial: qcom-geni: fix arg types for qcom_geni_serial_poll_bit()
soc: qcom: geni-se: add GP_LENGTH/IRQ_EN_SET/IRQ_EN_CLEAR registers
serial: qcom-geni: fix false console tx restart
serial: qcom-geni: fix fifo polling timeout
tty: hvc: convert comma to semicolon
mxser: convert comma to semicolon
serial: 8250_bcm2835aux: Fix clock imbalance in PM resume
serial: sc16is7xx: convert bitmask definitions to use BIT() macro
serial: sc16is7xx: fix copy-paste errors in EFR_SWFLOWx_BIT constants
serial: sc16is7xx: remove SC16IS7XX_MSR_DELTA_MASK
serial: xilinx_uartps: Make cdns_rs485_supported static
...
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0x7d and 0x7e bytes are meant to be escaped in the data portion of
frames, but this didn't occur since next_chunk_len() had an off-by-one
error. That also resulted in the final byte of a payload being written
as a separate tty write op.
The chunk prior to an escaped byte would be one byte short, and the
next call would never test the txpos+1 case, which is where the escaped
byte was located. That meant it never hit the escaping case in
mctp_serial_tx_work().
Example Input: 01 00 08 c8 7e 80 02
Previous incorrect chunks from next_chunk_len():
01 00 08
c8 7e 80
02
With this fix:
01 00 08 c8
7e
80 02
Cc: [email protected]
Fixes: a0c2ccd9b5ad ("mctp: Add MCTP-over-serial transport binding")
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Test various edge cases of inputs that contain characters
that need escaping.
This adds a new kunit suite for mctp-serial.
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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In tty, u8 is now used for data, ssize_t for sizes (with possible
negative error codes). Propagate these types (and use unsigned in
next_chunk_len()) to mctp.
Signed-off-by: Jiri Slaby (SUSE) <[email protected]>
Reviewed-by: Jeremy Kerr <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Jeremy Kerr <[email protected]>
Cc: Matt Johnston <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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If we encounter an error on i2c packet transmit, we won't have a valid
flow anymore; since we didn't transmit a valid packet sequence, we'll
have to wait for the key to timeout instead of dropping it on the reply.
This causes the i2c lock to be held for longer than necessary.
Instead, invalidate the flow on TX error, and release the i2c lock
immediately.
Cc: Bonnie Lo <[email protected]>
Tested-by: Jerry C Chen <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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These drivers don't use the driver_data member of struct i2c_device_id,
so don't explicitly initialize this member.
This prepares putting driver_data in an anonymous union which requires
either no initialization or named designators. But it's also a nice
cleanup on its own.
While add it, also remove commas after the sentinel entries.
Signed-off-by: Uwe Kleine-König <[email protected]>
Reviewed-by: Petr Machata <[email protected]> # For mlxsw
Reviewed-by: Kory Maincent <[email protected]>
Reviewed-by: Jeremy Kerr <[email protected]> # for mctp-i2c
Reviewed-by: Oleksij Rempel <[email protected]>
Acked-by: Oleksij Rempel <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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Provides MCTP network transport over an I3C bus, as specified in
DMTF DSP0233.
Each I3C bus (with "mctp-controller" devicetree property) gets an
"mctpi3cX" net device created. I3C devices are reachable as remote
endpoints through that net device. Link layer addressing uses the
I3C PID as a fixed hardware address for neighbour table entries.
The driver matches I3C devices that have the MIPI assigned DCR 0xCC for
MCTP.
Signed-off-by: Matt Johnston <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>
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This makes all those 'char's an explicit 'u8'. This is part of the
continuing unification of chars and flags to be consistent u8.
This approaches tty_port_default_receive_buf().
Note that we do not change signedness as we compile with
-funsigned-char.
Signed-off-by: "Jiri Slaby (SUSE)" <[email protected]>
Cc: William Hubbs <[email protected]>
Cc: Chris Brannon <[email protected]>
Cc: Kirk Reiser <[email protected]>
Cc: Samuel Thibault <[email protected]>
Cc: Marcel Holtmann <[email protected]>
Cc: Johan Hedberg <[email protected]>
Cc: Luiz Augusto von Dentz <[email protected]>
Cc: Dmitry Torokhov <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: Max Staudt <[email protected]>
Cc: Wolfgang Grandegger <[email protected]>
Cc: Marc Kleine-Budde <[email protected]>
Cc: Dario Binacchi <[email protected]>
Cc: Andreas Koensgen <[email protected]>
Cc: Jeremy Kerr <[email protected]>
Cc: Matt Johnston <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Takashi Iwai <[email protected]>
Acked-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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This makes all those 'unsigned char's an explicit 'u8'. This is part of
the continuing unification of chars and flags to be consistent u8.
This approaches tty_port_default_receive_buf(). Flags to be next.
Signed-off-by: "Jiri Slaby (SUSE)" <[email protected]>
Cc: William Hubbs <[email protected]>
Cc: Chris Brannon <[email protected]>
Cc: Kirk Reiser <[email protected]>
Cc: Samuel Thibault <[email protected]>
Cc: Dmitry Torokhov <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Max Staudt <[email protected]>
Cc: Wolfgang Grandegger <[email protected]>
Cc: Marc Kleine-Budde <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: Dario Binacchi <[email protected]>
Cc: Andreas Koensgen <[email protected]>
Cc: Jeremy Kerr <[email protected]>
Cc: Matt Johnston <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Takashi Iwai <[email protected]>
Cc: Peter Ujfalusi <[email protected]>
Acked-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Count passed to tty_ldisc_ops::receive_buf*(), ::lookahead_buf(), and
returned from ::receive_buf2() is expected to be size_t. So set it to
size_t to unify with the rest of the code.
Signed-off-by: "Jiri Slaby (SUSE)" <[email protected]>
Cc: William Hubbs <[email protected]>
Cc: Chris Brannon <[email protected]>
Cc: Kirk Reiser <[email protected]>
Cc: Samuel Thibault <[email protected]>
Cc: Marcel Holtmann <[email protected]>
Cc: Johan Hedberg <[email protected]>
Cc: Luiz Augusto von Dentz <[email protected]>
Cc: Dmitry Torokhov <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: Max Staudt <[email protected]>
Cc: Wolfgang Grandegger <[email protected]>
Cc: Marc Kleine-Budde <[email protected]>
Cc: Dario Binacchi <[email protected]>
Cc: Andreas Koensgen <[email protected]>
Cc: Jeremy Kerr <[email protected]>
Cc: Matt Johnston <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Takashi Iwai <[email protected]>
Acked-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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After commit b8a1a4cd5a98 ("i2c: Provide a temporary .probe_new()
call-back type"), all drivers being converted to .probe_new() and then
commit 03c835f498b5 ("i2c: Switch .probe() to not take an id parameter")
convert back to (the new) .probe() to be able to eventually drop
.probe_new() from struct i2c_driver.
Signed-off-by: Uwe Kleine-König <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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RFC1662 defines the start state for the crc16 FCS to be 0xffff, but
we're currently starting at zero.
This change uses the correct start state. We're only early in the
adoption for the serial binding, so there aren't yet any other users to
interface to.
Fixes: a0c2ccd9b5ad ("mctp: Add MCTP-over-serial transport binding")
Reported-by: Harsh Tyagi <[email protected]>
Tested-by: Harsh Tyagi <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Reviewed-by: Alexander Duyck <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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We're currently hitting the WARN_ON in mctp_i2c_flow_release:
if (midev->release_count > midev->i2c_lock_count) {
WARN_ONCE(1, "release count overflow");
This may be hit if we expire a flow before sending the first packet it
contains - as we will not be pairing the increment of release_count
(performed on flow release) with the i2c lock operation (only
performed on actual TX).
To fix this, only release a flow if we've encountered it previously (ie,
dev_flow_state does not indicate NEW), as we will mark the flow as
ACTIVE at the same time as accounting for the i2c lock operation. We
also need to add an INVALID flow state, to indicate when we've done the
release.
Fixes: f5b8abf9fc3d ("mctp i2c: MCTP I2C binding driver")
Reported-by: Jian Zhang <[email protected]>
Tested-by: Jian Zhang <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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The value returned by an i2c driver's remove function is mostly ignored.
(Only an error message is printed if the value is non-zero that the
error is ignored.)
So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour, all callbacks were prepared to
return 0 before.
Reviewed-by: Peter Senna Tschudin <[email protected]>
Reviewed-by: Jeremy Kerr <[email protected]>
Reviewed-by: Benjamin Mugnier <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Crt Mori <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Acked-by: Marek Behún <[email protected]> # for leds-turris-omnia
Acked-by: Andy Shevchenko <[email protected]>
Reviewed-by: Petr Machata <[email protected]> # for mlxsw
Reviewed-by: Maximilian Luz <[email protected]> # for surface3_power
Acked-by: Srinivas Pandruvada <[email protected]> # for bmc150-accel-i2c + kxcjk-1013
Reviewed-by: Hans Verkuil <[email protected]> # for media/* + staging/media/*
Acked-by: Miguel Ojeda <[email protected]> # for auxdisplay/ht16k33 + auxdisplay/lcd2s
Reviewed-by: Luca Ceresoli <[email protected]> # for versaclock5
Reviewed-by: Ajay Gupta <[email protected]> # for ucsi_ccg
Acked-by: Jonathan Cameron <[email protected]> # for iio
Acked-by: Peter Rosin <[email protected]> # for i2c-mux-*, max9860
Acked-by: Adrien Grassein <[email protected]> # for lontium-lt8912b
Reviewed-by: Jean Delvare <[email protected]> # for hwmon, i2c-core and i2c/muxes
Acked-by: Corey Minyard <[email protected]> # for IPMI
Reviewed-by: Vladimir Oltean <[email protected]>
Acked-by: Dmitry Torokhov <[email protected]>
Acked-by: Sebastian Reichel <[email protected]> # for drivers/power
Acked-by: Krzysztof Hałasa <[email protected]>
Signed-off-by: Uwe Kleine-König <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
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header_ops.create should return the length of the header,
instead mctp_i2c_head_create() returned 0.
This didn't cause any problem because the MCTP stack accepted
0 as success.
Fixes: f5b8abf9fc3d ("mctp i2c: MCTP I2C binding driver")
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Since commit
baebdf48c3600 ("net: dev: Makes sure netif_rx() can be invoked in any context.")
the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.
Use netif_rx().
Cc: Jeremy Kerr <[email protected]>
Cc: Matt Johnston <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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We should be testing the length before fitting into the u8 byte_count.
This is just a sanity check, the MCTP stack should have limited to MTU
which is checked, and we check consistency later in mctp_i2c_xmit().
Found by Smatch
mctp_i2c_header_create() warn: impossible condition
'(hdr->byte_count > 255) => (0-255 > 255)'
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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The skb is handed off to netif_rx() which may free it.
Found by Smatch.
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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Provides MCTP network transport over an I2C bus, as specified in
DMTF DSP0237. All messages between nodes are sent as SMBus Block Writes.
Each I2C bus to be used for MCTP is flagged in devicetree by a
'mctp-controller' property on the bus node. Each flagged bus gets a
mctpi2cX net device created based on the bus number. A
'mctp-i2c-controller' I2C client needs to be added under the adapter. In
an I2C mux situation the mctp-i2c-controller node must be attached only
to the root I2C bus. The I2C client will handle incoming I2C slave block
write data for subordinate busses as well as its own bus.
In configurations without devicetree a driver instance can be attached
to a bus using the I2C slave new_device mechanism.
The MCTP core will hold/release the MCTP I2C device while responses
are pending (a 6 second timeout or once a socket is closed, response
received etc). While held the MCTP I2C driver will lock the I2C bus so
that the correct I2C mux remains selected while responses are received.
(Ideally we would just lock the mux to keep the current bus selected for
the response rather than a full I2C bus lock, but that isn't exposed in
the I2C mux API)
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Reviewed-by: Wolfram Sang <[email protected]> # I2C transport parts
Signed-off-by: David S. Miller <[email protected]>
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We cannot do the cancel_work_sync from after the unregister_netdev, as
the dev pointer is no longer valid, causing a uaf on ldisc unregister
(or device close).
Instead, do the cancel_work_sync from the ndo_uninit op, where the dev
still exists, but the queue has stopped.
Fixes: 7bd9890f3d74 ("mctp: serial: cancel tx work on ldisc close")
Reported-by: Luo Likang <[email protected]>
Tested-by: Luo Likang <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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Jiri assures me that a ldisc->open with tty->disc_data set should never
happen, so this check doesn't do anything.
Reported-by: Jiri Slaby <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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The current serial driver requires a maximum MTU of 68, and it doesn't
make sense to set a MTU below the MCTP-required baseline (of 68) either.
This change sets the min_mtu & max_mtu of the mctp netdev, essentially
disallowing changes. By using these instead of a ndo_change_mtu op, we
get the netlink extacks reported too.
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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We want to ensure that the tx work has finished before returning from
the ldisc close op, so do a synchronous cancel.
Reported-by: Jiri Slaby <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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This change adds a MCTP Serial transport binding, as defined by DMTF
specificiation DSP0253 - "MCTP Serial Transport Binding". This is
implemented as a new serial line discipline, and can be attached to
arbitrary tty devices.
From the Kconfig description:
This driver provides an MCTP-over-serial interface, through a
serial line-discipline, as defined by DMTF specification "DSP0253 -
MCTP Serial Transport Binding". By attaching the ldisc to a serial
device, we get a new net device to transport MCTP packets.
This allows communication with external MCTP endpoints which use
serial as their transport. It can also be used as an easy way to
provide MCTP connectivity between virtual machines, by forwarding
data between simple virtual serial devices.
Say y here if you need to connect to MCTP endpoints over serial. To
compile as a module, use m; the module will be called mctp-serial.
Once the N_MCTP line discipline is set [using ioctl(TCIOSETD)], we get a
new netdev suitable for MCTP communication.
The 'mctp' utility[1] provides a simple wrapper for this ioctl, using
'link serial <device>':
# mctp link serial /dev/ttyS0 &
# mctp link
dev lo index 1 address 0x00:00:00:00:00:00 net 1 mtu 65536 up
dev mctpserial0 index 5 address 0x(no-addr) net 1 mtu 68 down
[1]: https://github.com/CodeConstruct/mctp
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This reverts commit 71812af7234f30362b43ccff33f93890ae4c0655, reversing
changes made to cc0be1ad686fb29a4d127948486f40b17fb34b50.
Wolfram Sang says:
Please revert. Besides the driver in net, it modifies the I2C core
code. This has not been acked by the I2C maintainer (in this case me).
So, please don't pull this in via the net tree. The question raised here
(extending SMBus calls to 255 byte) is complicated because we need ABI
backwards compatibility.
Link: https://lore.kernel.org/all/YZJ9H4eM%2FM7OXVN0@shikoro/
Signed-off-by: Jakub Kicinski <[email protected]>
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Provides MCTP network transport over an I2C bus, as specified in
DMTF DSP0237. All messages between nodes are sent as SMBus Block Writes.
Each I2C bus to be used for MCTP is flagged in devicetree by a
'mctp-controller' property on the bus node. Each flagged bus gets a
mctpi2cX net device created based on the bus number. A
'mctp-i2c-controller' I2C client needs to be added under the adapter. In
an I2C mux situation the mctp-i2c-controller node must be attached only
to the root I2C bus. The I2C client will handle incoming I2C slave block
write data for subordinate busses as well as its own bus.
In configurations without devicetree a driver instance can be attached
to a bus using the I2C slave new_device mechanism.
The MCTP core will hold/release the MCTP I2C device while responses
are pending (a 6 second timeout or once a socket is closed, response
received etc). While held the MCTP I2C driver will lock the I2C bus so
that the correct I2C mux remains selected while responses are received.
(Ideally we would just lock the mux to keep the current bus selected for
the response rather than a full I2C bus lock, but that isn't exposed in
the I2C mux API)
This driver requires I2C adapters that allow 255 byte transfers
(SMBus 3.0) as the specification requires a minimum MTU of 68 bytes.
Signed-off-by: Matt Johnston <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Add an empty drivers/net/mctp/, for future interface drivers.
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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