Here comes the 15th iteration of the patch. This new version addresses
the comments received from Marc (thanks again for the review!) and
simplify the device probing by using .driver_info.
** Changelog **
Changes in v15 (2021-04-10):
- Use of .driver_info to keep track of each device quirks (c.f. enum
es58x_driver_info).
- Replace es58x_netdev_queue_set_dql_min_limit() by
netdev_queue_set_dql_min_limit() which was recently added in
net-next.
- es58x_start_xmit: remove the recursive call.
- es58x_start_xmit: remove the memset zero of the urb
transfer_buffer in es58x_xmit(). Adjust the
es58{1_4,x_fd}_tx_can_msg() glue code accordingly to make sure
that all relevant fields are correctly initialised.
- es58x_start_xmit: directly update tx_head each time a packet is
queued in can.echo_skb[].
- Remove es58x_set_bittiming() and es58x_set_data_bittiming(). The
bittiming is now set when opening the channel.
- Shutdown the channel when a bus off event occurs. Remove the
es58x_reset() function which is not needed anymore after this
change.
- Cleanup of the {net,}dev_dbg() calls to make the driver less
verbose.
- Modify es58x_open(), es58x_close() and es58x_probe() in order to
release driver resources as much as possible when all the network
interfaces of the device are down.
- Other trivial changes (c.f. below link for details)
Reference: https://lore.kernel.org/linux-can/20210321104103.213308-1-mailhol.vincent@xxxxxxxxxx/T/#m8ca804e9f53584b79acd236602403d5b82db1e6c
Changes in v14 (2021-03-21):
- Rework the split into core support, es581_4, es58x_fd (cosmetic
change) so that es581_4.h and es58x_fd.h headers can be added in
one block.
- Add a fourth patch to introduce a helper function
es58x_netdev_queue_set_dql_min_limit() to set up dql minimum limit
(in parallel, I will try to have this merged in the network device
header)
- Remove unused function es58x_add_skb_idx(): leftover from the old
FIFO logic, should have been removed in v11.
- Fix memory leak in es58x_get_product_info(): buffer was not freed
in case of error in usb_sting().
- s/loopback/echo and s/self reception/echo: in the driver the terms
"loopback, self reception, and echo" were all used to designated
the same thing. Renamed structures, variables and comments
accordingly to make it more consistent.
- Remove CAN_CTRLMODE_LOOPBACK. The driver never supported this
feature. It was added due to a confusion with the echo skb.
- Use the new can_free_echo_skb() which return the frame_len.
- Do the statistics handling in es58x_rx_err_msg() even if kalloc()
fails.
- Replace array es58x_cmd_ret_desc[] by helper function
es58x_cmd_ret_desc().
- Other trivial changes (c.f. below link for details)
Reference: https://lore.kernel.org/linux-can/50850e5f-87c6-505e-4398-babce3facb97@xxxxxxxxxxxxxx/T/#mbcace9c13b19a504cd28d81591f983b95eb66657
Changes in v13 (2021-03-19 by Marc Kleine-Budde):
- split the driver into 3 patches, so that it can be send via
mailing lists (core support, es581_4, es58x_fd)
- Remove the dql.min_limit settings
- typo and kernel doc fixes
Reference: https://lore.kernel.org/linux-can/50850e5f-87c6-505e-4398-babce3facb97@xxxxxxxxxxxxxx/T/#t
Changes in v12 (2021-03-09):
- Rework the queue stop/wake management so that spinlocks are not
needed anymore.
- es58x_start_xmit(): check for valid SKB using
can_dropped_invalid_skb().
- Implemented TDC according to latest patches in linux-can-next.
Reference: https://lore.kernel.org/linux-can/20210224002008.4158-1-mailhol.vincent@xxxxxxxxxx/T/#t
Changes in v11 (2021-01-23):
- Remove all WARN_ON() calls: these were use during development,
relevant tests are done not to trigger these.
- es58x_start_xmit(): added net_ratelimit() condition to prevent
spamming dmesg.
- add a new es58x_xmit_more() function and simplify the code of
es58x_start_xmit().
- Removed functions {es581_4,es58x_fd}_print_conf() which were only
there for debug.
- Additional comment for es58x_fd_param.bitrate_max.
- Make the device FIFO size a power of two and modify the echo_skb
indexes logic to prevent the use of spinlocks.
Changes in v10 (2021-01-12):
- Rebased on linux-can-next/testing and modified according to latest
BQL patches.
Reference: https://lore.kernel.org/linux-can/20210111141930.693847-1-mkl@xxxxxxxxxxxxxx/T/#m5f99d4da8e8934a75f9481ecc3137b59f3762413
- Replaced __netdev_sent_queue() by netdev_sent_queue().
Changes in v9 (2021-01-09):
- es58x_start_xmit(): do not use skb anymore after the call of
can_put_echo_skb(). Rationale: can_put_echo_skb() calls
skb_clone() and thus the original skb gets consumed (i.e. use
after free issue).
- es58x_start_xmit(): Add a "drop_skb" label to free the skb when
errors occur.
Changes in v8 (2021-01-04):
- The driver requires CRC16. Modified Kconfig accordingly.
Changes in v7 (2020-11-17):
- Fix compilation issue if CONFIG_BQL is not set.
Reference: https://lkml.org/lkml/2020/11/15/163
Changes in v6 (2020-11-15):
- Rebase the patch on the testing branch of linux-can-next.
- Rename the helper functions according latest changes
(e.g. can_cc_get_len() -> can_cc_dlc2len())
- Fix comments of enum es58x_physical_layer and enum
es58x_sync_edge.
Changes in v5 (2020-11-07):
- Add support for DLC greater than 8.
- All other patches from the previous series were either accepted or
dismissed. As such, this is not a series any more but a single
patch.
Changes in v4 (2020-10-17):
- Remove struct es58x_abstracted_can_frame.
- Fix formatting (spaces, comment style).
- Transform macros into static inline functions when possible.
- Fix the ctrlmode_supported flags in es581_4.c and removed
misleading comments in enum es58x_samples_per_bit.
- Rename enums according to the type.
- Remove function es58x_can_put_echo_skb().
Reference: https://lkml.org/lkml/2020/10/10/53
Changes in v3 (2020-10-03):
- Remove all the calls to likely() and unlikely().
Reference: https://lkml.org/lkml/2020/9/30/995
Changes in v2 (2020-09-30):
- Fixed -W1 warnings (v1 was tested with GCC -WExtra but not with -W1).
v1 (2020-09-27):
- First release
Vincent Mailhol (3):
can: etas_es58x: add core support for ETAS ES58X CAN USB interfaces
can: etas_es58x: add support for ETAS ES581.4 CAN USB interface
can: etas_es58x: add support for the ETAS ES58X_FD CAN USB interfaces
drivers/net/can/usb/Kconfig | 10 +
drivers/net/can/usb/Makefile | 1 +
drivers/net/can/usb/etas_es58x/Makefile | 3 +
drivers/net/can/usb/etas_es58x/es581_4.c | 507 ++++
drivers/net/can/usb/etas_es58x/es581_4.h | 207 ++
drivers/net/can/usb/etas_es58x/es58x_core.c | 2301 +++++++++++++++++++
drivers/net/can/usb/etas_es58x/es58x_core.h | 700 ++++++
drivers/net/can/usb/etas_es58x/es58x_fd.c | 562 +++++
drivers/net/can/usb/etas_es58x/es58x_fd.h | 243 ++
9 files changed, 4534 insertions(+)
create mode 100644 drivers/net/can/usb/etas_es58x/Makefile
create mode 100644 drivers/net/can/usb/etas_es58x/es581_4.c
create mode 100644 drivers/net/can/usb/etas_es58x/es581_4.h
create mode 100644 drivers/net/can/usb/etas_es58x/es58x_core.c
create mode 100644 drivers/net/can/usb/etas_es58x/es58x_core.h
create mode 100644 drivers/net/can/usb/etas_es58x/es58x_fd.c
create mode 100644 drivers/net/can/usb/etas_es58x/es58x_fd.h
--
2.26.3
