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Date: Sat, 10 Apr 2021 18:59:45 +0900
From: Vincent Mailhol <mailhol.vincent@...adoo.fr>
To: Marc Kleine-Budde <mkl@...gutronix.de>, linux-can@...r.kernel.org
Cc: Jimmy Assarsson <extja@...ser.com>,
Masahiro Yamada <masahiroy@...nel.org>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
Arunachalam Santhanam <arunachalam.santhanam@...bosch.com>,
Vincent Mailhol <mailhol.vincent@...adoo.fr>
Subject: [PATCH v15 0/3] Introducing ETAS ES58X CAN USB interfaces
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@wanadoo.fr/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@pengutronix.de/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@pengutronix.de/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@wanadoo.fr/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@pengutronix.de/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
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