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The pointer of_node is being initialized with a value that is never
read and it is being updated later with a new value inside a do-while
loop. The initialization is redundant and can be removed and the
pointer dev is no longer required and can be removed too.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Current MCAM allocation scheme allocates a single lot of
MCAM entries for ntuple filters, unicast filters and VF VLAN
rules. This patch attempts to cleanup this logic by segregating
MCAM rule allocation and management for Ntuple rules and unicast,
VF VLAN rules. This segregation will result in reusing most of
the logic for supporting ntuple filters for VF devices.
Also added debug messages for MCAM entry allocation failures.
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Test cleanup path for routes usinig nexthop objects before the
reference is taken on the nexthop. Specifically, bad metric for
ipv4 and ipv6 and source routing for ipv6.
Selftests that correspond to the recent bug fix:
821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions")
Signed-off-by: David Ahern <dsahern@kernel.org>
Cc: Coco Li <lixiaoyan@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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M Chetan Kumar says:
====================
net: iosm: PCIe Driver for Intel M.2 Modem
The IOSM (IPC over Shared Memory) driver is a PCIe host driver implemented
for linux or chrome platform for data exchange over PCIe interface between
Host platform & Intel M.2 Modem. The driver exposes interface conforming to
the MBIM protocol. Any front end application ( eg: Modem Manager) could
easily manage the MBIM interface to enable data communication towards WWAN.
Intel M.2 modem uses 2 BAR regions. The first region is dedicated to Doorbell
register for IRQs and the second region is used as scratchpad area for book
keeping modem execution stage details along with host system shared memory
region context details. The upper edge of the driver exposes the control and
data channels for user space application interaction. At lower edge these data
and control channels are associated to pipes. The pipes are lowest level
interfaces used over PCIe as a logical channel for message exchange. A single
channel maps to UL and DL pipe and are initialized on device open.
On UL path, driver copies application sent data to SKBs associate it with
transfer descriptor and puts it on to ring buffer for DMA transfer. Once
information has been updated in shared memory region, host gives a Doorbell
to modem to perform DMA and modem uses MSI to communicate back to host.
For receiving data in DL path, SKBs are pre-allocated during pipe open and
transfer descriptors are given to modem for DMA transfer.
The driver exposes two types of ports, namely "wwan0mbim0", a char device node
which is used for MBIM control operation and "wwan0-x",(x = 0,1,2..7) network
interfaces for IP data communication.
1) MBIM Control Interface:
This node exposes an interface between modem and application using char device
exposed by "IOSM" driver to establish and manage the MBIM data communication
with PCIe based Intel M.2 Modems.
2) MBIM Data Interface:
The IOSM driver exposes IP link interface "wwan0-x" of type "wwan" for IP traffic.
Iproute network utility is used for creating "wwan0-x" network interface and for
associating it with MBIM IP session. The Driver supports upto 8 IP sessions for
simultaneous IP communication.
This applies on top of WWAN core rtnetlink series posted here:
https://lore.kernel.org/netdev/1623486057-13075-1-git-send-email-loic.poulain@linaro.org/
Also driver has been compiled and tested on top of netdev net-next tree.
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Kconfig & Makefile changes for IOSM Driver compilation.
2) Add IOSM Driver documentation.
3) Modified MAINTAINER file for IOSM Driver addition.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Create net device & implement net operations for data/IP communication.
2) Bind IP Link to mux IP session for simultaneous IP traffic.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Report modem status via uevent.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Update UL/DL transfer descriptors in message ring.
2) Define message set for pipe/sleep protocol.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Defines messaging protocol for handling Transfer Descriptor
in both UL/DL direction.
2) Ring buffer management.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implements state machine to handle host & device sleep.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Encode UL packet into datagram.
2) Decode DL datagram and route it to network layer.
3) Supports credit based flow control.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Establish IP session between host-device & session management.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Bottom half(tasklet) for IRQ and task processing.
2) Tasks are processed asynchronous and synchronously.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implements wwan port for MBIM & AT protocol communication
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Defines pipes & channel configurations like channel type,
pipe mappings, No. of transfer descriptors and transfer
buffer size etc.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Binds logical channel between host-device for communication.
2) Implements device specific(Char/Net) IO operations.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Initializes shared memory for host-device communication.
2) Allocate resources required for control & data operations.
3) Transfers the Device IRQ to IPC execution thread.
4) Defines the timer cbs for async events.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Initializes the Scratchpad region for Host-Device communication.
2) Exposes device capabilities like chip info and device execution
stages.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Request interrupt vector, frees allocated resource.
2) Registers IRQ handler.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Register IOSM driver with kernel to manage Intel WWAN PCIe
device(PCI_VENDOR_ID_INTEL, INTEL_CP_DEVICE_7560_ID).
2) Exposes the EP PCIe device capability to Host PCIe core.
3) Initializes PCIe EP configuration and defines PCIe driver probe, remove
and power management OPS.
4) Allocate and map(dma) skb memory for data communication from device to
kernel and vice versa.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alex Elder says:
====================
net: qualcomm: rmnet: MAPv4 download checksum cleanup, part 2
This is part 2 of a large series that reworks some code that handles
downloaded packets when MAPv4 checksum offload is enabled. The
first part, which includes an overview, is here:
https://lore.kernel.org/netdev/20210611190529.3085813-1-elder@linaro.org/
This second part of the series completes the simplification of this
handling code, removing unnecessary byte swaps and bitwise inversions
of checksum values, and along the way avoids the need for almost all
of the forced type casts. The checksum field in an RMNet download
trailer is given __sum16_t type to accurately reflect the meaning of
that field.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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We don't support any extension headers for IPv6 packets. Extension
headers therefore contribute 0 bytes to the payload length. As a
result we can just use the IPv6 payload length as the length used to
compute the pseudo header checksum for both UDP and TCP messages.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We compare a payload checksum with a pseudo checksum value for
equality in rmnet_map_ipv4_dl_csum_trailer(). Both of those values
are computed with a unary NOT (~) operation. The result of the
comparison is the same if we omit that NOT for both values.
Remove these operations in rmnet_map_ipv6_dl_csum_trailer() also.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The csum_value field in the rmnet_map_dl_csum_trailer structure is a
"real" Internet checksum. It is a 16 bit value, in big endian format,
which represents an inverted ones' complement sum over pairs of bytes.
Make that clear by changing its type to __sum16.
This makes a typecast in rmnet_map_ipv4_dl_csum_trailer() and
another in rmnet_map_ipv6_dl_csum_trailer() unnecessary.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The previous patch makes rmnet_map_ipv4_dl_csum_trailer() return
early with an error if it is determined that the computed checksum
for the IP payload does not match what was expected.
If the computed checksum *does* match the expected value, the IP
payload (i.e., the transport message), can be considered good.
There is no need to do any further processing of the message.
This means a big block of code is unnecessary for validating the
transport checksum value, and can be removed.
Make comparable changes in rmnet_map_ipv6_dl_csum_trailer().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In rmnet_map_ipv4_dl_csum_trailer(), if the sum of the trailer
checksum and the pseudo checksum is non-zero, checksum validation
has failed. We can return an error as soon as we know that.
We can do the same thing in rmnet_map_ipv6_dl_csum_trailer().
Add some comments that explain where we're headed.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch simply demonstrates that a checksum value computed when
verifying an offloaded transport checksum value for both IPv4 and
IPv6 is (normally) 0. It can be squashed into the next patch.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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With the ones' complement arithmetic, the sum of two negated values
is equal to the negation of the sum of the two original values [1].
Rearrange the calculation ip6_payload_sum using this property.
[1] https://tools.ietf.org/html/rfc1071
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In rmnet_map_ipv4_dl_csum_trailer(), remove the "csum_temp" and
"addend" local variables, and simplify a few lines of code.
Remove the "csum_temp", "csum_value", "ip6_hdr_csum", and "addend"
local variables in rmnet_map_ipv6_dl_csum_trailer(), and simplify a
few lines of code there as well.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Loic Poulain says:
====================
net: Add WWAN link creation support
Most of the modern WWAN modems are able to support multiple network
contexts, allowing user to connect to different APNs (e.g. Internet,
MMS, etc...). These contexts are usually dynamically configured via
a control channel such as MBIM, QMI or AT.
Each context is naturally represented as a network link/device, and
the muxing of these links is usually vendor/bus specific (QMAP, MBIM,
intel iosm...). Today some drivers create a static collection of
netdevs at init time, some relies on VLAN link for associating a context
(cdc-mbim), some exposes sysfs attribute for dynamically creating
additional netdev (qmi_wwan add_mux attr) or relies on vendor specific
link type (rmnet) for performing the muxing... so there is no generic
way to handle WWAN links, making user side integration painful.
This series introduces a generic WWAN link management interface to the
WWAN framework, allowing user to dynamically create and remove WWAN
links through rtnetlink ('wwan' type). The underlying 'muxing' vendor
implementation is completely abstracted.
The idea is to use this interface for upcoming WWAN drivers (intel
iosm) and to progressively integrate support into existing ones
(qmi_wwan, cdc-mbim, mhi_net, etc...).
v2: - Squashed Johannes and Sergey changes
- Added IFLA_PARENT_DEV_BUS_NAME attribute
- reworded commit message + introduce Sergey's comment
v3: - Added basic new interface user to this series (mhi_net)
- Moved IFLA_PARENT_DEV_NAME nla_policy introduction to right patch
- Added cover letter
- moved kdoc to .c file
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Register wwan_ops for link management via wwan rtnetlink. This is
only basic support for now, since we only support creating one
single link (link-0), but is useful to validate new wwan rtnetlink
interface.
For backward compatibity support, we still register a default netdev
at probe time, except if 'create_default_iface' module parameter is
set to false.
This has been tested with iproute2 and mbimcli:
$ ip link add dev wwan0-0 parentdev-name wwan0 type wwan linkid 0
$ mbimcli -p -d /dev/wwan0p2MBIM --connect apn=free
$ ip link set dev wwan0-0 up
$ ip addr add dev wwan0 ${IP}
$ ip route replace default via ${IP}
$ ping 8.8.8.8
...
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support to create (and destroy) interfaces via a new
rtnetlink kind "wwan". The responsible driver has to use
the new wwan_register_ops() to make this possible.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In some cases, for example in the upcoming WWAN framework changes,
there's no natural "parent netdev", so sometimes dummy netdevs are
created or similar. IFLA_PARENT_DEV_NAME is a new attribute intended to
contain a device (sysfs, struct device) name that can be used instead
when creating a new netdev, if the rtnetlink family implements it.
As suggested by Parav Pandit, we also introduce IFLA_PARENT_DEV_BUS_NAME
attribute in order to uniquely identify a device on the system (with
bus/name pair).
ip-link(8) support for the generic parent device attributes will help
us avoid code duplication, so no other link type will require a custom
code to handle the parent name attribute. E.g. the WWAN interface
creation command will looks like this:
$ ip link add wwan0-1 parent-dev wwan0 type wwan channel-id 1
So, some future subsystem (or driver) FOO will have an interface
creation command that looks like this:
$ ip link add foo1-3 parent-dev foo1 type foo bar-id 3 baz-type Y
Below is an example of dumping link info of a random device with these
new attributes:
$ ip --details link show wlp0s20f3
4: wlp0s20f3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP mode DORMANT group default qlen 1000
...
parent_bus pci parent_dev 0000:00:14.3
Co-developed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Co-developed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Suggested-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In order to make rtnetlink ops that can create different
kinds of devices, like what we want to add to the WWAN
framework, the priv_size and setup parameters aren't quite
sufficient. Make this easier to manage by allowing ops to
allocate their own netdev via an @alloc method that gets
the tb netlink data.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix the following kernel build warnings:
drivers/net/ethernet/ibm/ibmvnic.c:1516: warning: Function parameter or member 'skb' not described in 'build_hdr_descs_arr'
drivers/net/ethernet/ibm/ibmvnic.c:1516: warning: Function parameter or member 'indir_arr' not described in 'build_hdr_descs_arr'
drivers/net/ethernet/ibm/ibmvnic.c:1516: warning: Excess function parameter 'txbuff' description in 'build_hdr_descs_arr'
Signed-off-by: Lijun Pan <lijunp213@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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drivers/net/ethernet/ibm/ibmvnic.c: In function ‘adapter_state_to_string’:
drivers/net/ethernet/ibm/ibmvnic.c:855:2: warning: enumeration value ‘VNIC_DOWN’ not handled in switch [-Wswitch]
855 | switch (state) {
| ^~~~~~
drivers/net/ethernet/ibm/ibmvnic.c: In function ‘reset_reason_to_string’:
drivers/net/ethernet/ibm/ibmvnic.c:1958:2: warning: enumeration value ‘VNIC_RESET_PASSIVE_INIT’ not handled in switch [-Wswitch]
1958 | switch (reason) {
| ^~~~~~
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Lijun Pan <lijunp213@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Wong Vee Khee says:
====================
stmmac: intel: minor clean-up
This patch series include two minor-cleanup patches:
1. Move all the hardcoded DEFINEs to dwmac-intel header file.
2. Fix the wrong kernel-doc on the intel_eth_pci_remove() function.
Since the changes are minor, only basic sanity tests are done on a
Intel TigerLake with Marvell88E2110 PHY:-
- Link is up and able to perform ping.
- phc2sys and ptp4l are running without errors.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Kernel-doc for intel_eth_pci_remove is incorrect, pdev datatype is
struct pci_dev. Changed it to the 'pci device pointer'.
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently some of the dwmac-intel definitions are in the header file,
while some are in the driver source file. Cleaning this by moving all
the definitions to the header file.
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Steen Hegelund says:
====================
Add 25G BASE-R support
This series add the 25G BASE-R mode to the set modes supported.
This mode is used by the Sparx5 Switch for its 25G SerDes.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add 25gbase-r interface type and speed to phylink.
This is needed for the Sparx5 switch.
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for 25gbase-r modules. This is needed for the Sparx5 switch.
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add 25gbase-r phy interface mode
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add 25gbase-r PHY interface mode.
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Julian Wiedmann says:
====================
s390/iucv: updates 2021-06-11
please apply the following iucv patches to netdev's net-next tree.
This cleans up a pattern of forward declarations in two iucv drivers,
so that they stop causing compile warnings with gcc11.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Move netiucv_handler to get rid of forward declarations and gcc11
compile warnings:
drivers/s390/net/netiucv.c:518:65: warning: argument 2 of type ‘u8[16]’ {aka ‘unsigned char[16]’} with mismatched bound [-Warray-parameter=]
518 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16])
| ~~~^~~~~~~~~~
drivers/s390/net/netiucv.c:122:58: note: previously declared as ‘u8 *’ {aka ‘unsigned char *’}
122 | static void netiucv_callback_connack(struct iucv_path *, u8 *);
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The forward declarations for the iucv_handler callbacks are causing
various compile warnings with gcc-11. Reshuffle the code to get rid
of these prototypes.
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alex Elder says:
====================
net: ipa: introduce ipa_syfs.c
This series (its last patch, actually) creates a new source file,
"ipa_syfs.c", to contain functions and data that expose to user
space information known by the IPA driver via device attributes.
The directory containing these files on supported systems is:
/sys/devices/platform/soc@0/1e40000.ipa
And within that direcftory, the following files and directories
are added:
.
|-- feature
| |-- rx_offload Type of checksum offload supported
| `-- tx_offload
| . . .
|-- modem
| |-- rx_endpoint_id IPA endpoint IDs for the embedded modem
| `-- tx_endpoint_id
| . . .
|-- version IPA hardware version (informational)
. . .
The first patch just makes endpoint validation unconditional, as
suggested by Leon Romanovsky. The second just ensures the version
defined in configuration data is valid, so the version attribute
doesn't have to handle unrecognized version numbers.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add IPA device attributes to expose information known by the IPA
driver about the hardware and its configuration.
All pointers used to display these attribute values (i.e., IPA
pointer and endpoint pointers) will have been initialized by the
time IPA probe has completed, so they may be safely dereferenced.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Define and use a new function that just validates the version
defined in configuration data.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
