Merge patch series "can: support CAN XL"

Oliver Hartkopp <[email protected]> says:

The CAN with eXtended data Length (CAN XL) is a new CAN protocol with
a 10Mbit/s data transfer with a new physical layer transceiver (for
this data section). CAN XL allows up to 2048 byte of payload and
shares the arbitration principle (11 bit priority) known from
Classical CAN and CAN FD. RTR and 29 bit identifiers are not
implemented in CAN XL.

A short introduction to CAN XL can be found here:
https://www.can-cia.org/can-knowledge/can/can-xl/
https://github.com/linux-can/can-doc/blob/master/presentations/CAN-XL-Intro.pdf

V1: https://lore.kernel.org/all/[email protected]

V2: Major rework after discussion and feedback on Linux-CAN ML
    https://lore.kernel.org/all/[email protected]

- rework of struct canxl_frame
- CANXL_XLF flag is now the switch between CAN XL and CAN/CANFD
- variable length in r/w operations for CAN XL frames
- write CAN XL frame to raw socket enforces size <-> canxl_frame.len sync

V3: Fix length for CAN XL frames inside the sk_buff
    https://lore.kernel.org/all/[email protected]

- extend the CAN_RAW sockopt to handle fixed/truncated read/write operations

V4: Fix patch 5 (can: raw: add CAN XL support)
    https://lore.kernel.org/all/[email protected]

- fix return value (move 'err = -EINVAL' in raw_sendmsg())
- add CAN XL frame handling in can_rcv()
- change comment for CAN_RAW_XL_[RT]X_DYN definition (allow -> enable)

V5: Remove CAN_RAW_XL_[RT]X_DYN definition again
    https://lore.kernel.org/all/[email protected]

- CAN_RAW_XL_[RT]X_DYN (truncated data) feature is now enabled by default
- use CANXL_MIN_DLEN instead of '1' in canxl_frame definition
- add missing 'err = -EINVAL' initialization in raw_sendmsg())

V6: https://lore.kernel.org/all/[email protected]

- rework an separate skb identification and length helpers
- add CANFD_FDF flag in all CAN FD frame structures
- simplify patches for infrastructure and raw sockets
- add vxcan support in virtual CAN interface patch

V7: https://lore.kernel.org/all/[email protected]

- fixed indention as remarked by Marc
- set CANFD_FDF flag when detecting CAN FD frames generated by PF_PACKET
- Allow to use variable CAN XL MTU sizes to enforce real time requirements
  on CAN XL segments (e.g. to support of CAN CiA segmentation concept)

V8: https://lore.kernel.org/all/[email protected]

- fixed typo as remarked by Vincent
- rebased to latest can-next/net-next tree

V9: https://lore.kernel.org/all/[email protected]

- rebased to latest can-next/net-next tree
- updated and extended public available CAN XL documenatation in cover letter
- renamed struct canxl_frame variable cfx to cxl as suggested by Vincent
- Added Acked-by: Vincent Mailhol <[email protected]> tag

Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>

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