It looks like VRX518 returns phys addr of data buffer in the 'data_ptr'
field of the RX descriptor and an actual data offset within the buffer
in the 'byte_off' field. In order to map the phys address back to
virtual we need the original phys address of the allocated buffer.
In the same driver applies offset to phys address before the mapping,
what leads to WARN_ON triggering in plat_mem_virt() function with
subsequent kernel panic:
WARNING: CPU: 0 PID: 0 at .../sw_plat.c:764 0xbf306cd0 [vrx518_tc@8af9f5d0+0x25000]
...
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = aff5701e
[00000000] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Noticed in ATM mode, when chip always returns byte_off = 4.
In order to fix the issue, pass the phys address to plat_mem_virt() as
is and apply byte_off later for proper DMA syncing and on mapped virtual
address when copying RXed data into the skb.
Run tested with FRITZ!Box 7530 on both ADSL and VDSL (thanks Jan) links.
Fixes: 474bbe23b7 ("kernel: add Intel/Lantiq VRX518 TC driver")
Tested-by: Jan Hoffmann <jan@3e8.eu> # VDSL link
Reported-and-tested-by: nebibigon93@yandex.ru # ADSL link
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Link: https://patchwork.ozlabs.org/project/openwrt/patch/20250122222654.21833-2-ryazanov.s.a@gmail.com/
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
vrx518_tc currently sets the interface maximum MTU to the ethernet default
of 1500 bytes by default via ether_setup() called from ptm_setup().
To support 1508 byte baby jumbo frames (RFC4638) for PPPoE connections
over VDSL links as already supported by the VR9 ltq_ptm driver ([1], [2])
set the interface maximum MTU to MAX_MTU.
MAX_MTU is defined in dcdp/inc/tc_common.h to 2002 bytes and this value is
used in ptm_change_mtu() and elsewhere as the maximum MTU, however this is
short circuited by checks against the interface maximum MTU.
[1]: https://forum.openwrt.org/t/fritzbox-7530-and-rfc4638-baby-jumbo-frames/181327
[2]: https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=8a2a20e71e2909f84dab47e51dfda9e292a6c1ae
Signed-off-by: Andrew MacIntyre <andymac@pcug.org.au>
Link: https://github.com/openwrt/openwrt/pull/16856
Signed-off-by: Robert Marko <robimarko@gmail.com>
Alloc MIB struct dynamically instead to fix compilation warning for
stack limit.
Fix compilation warning:
/__w/openwrt/openwrt/openwrt/build_dir/target-arm-openwrt-linux-muslgnueabi_musl/linux-ipq40xx_chromium/vrx518_tc_drv-ugw_8.5.2.10/dcdp/ptm_tc.c: In function 'ptm_tc_get_stats':
/__w/openwrt/openwrt/openwrt/build_dir/target-arm-openwrt-linux-muslgnueabi_musl/linux-ipq40xx_chromium/vrx518_tc_drv-ugw_8.5.2.10/dcdp/ptm_tc.c:463:1: error: the frame size of 1032 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
463 | }
| ^
cc1: all warnings being treated as errors
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Add patch fixing compilation warning for atm_tc module.
Fix compilation warning:
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-arm-openwrt-linux-muslgnueabi_musl/linux-ipq40xx_generic/vrx518_tc_drv-ugw_8.5.2.10/dcdp/atm_tc.c: In function 'print_datetime':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-arm-openwrt-linux-muslgnueabi_musl/linux-ipq40xx_generic/vrx518_tc_drv-ugw_8.5.2.10/dcdp/atm_tc.c:768:32: error: argument to 'sizeof' in 'snprintf' call is the same expression as the destination; did you mean to provide an explicit length? [-Werror=sizeof-pointer-memaccess]
768 | snprintf(buffer, sizeof(buffer), "%s.%06d", tmbuf, (int)datetime->tv_nsec / 1000);
| ^
cc1: all warnings being treated as errors
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This driver version is also included in Intel UGW 8.5.2.10.
Signed-off-by: Martin Schiller <ms.3headeddevs@gmail.com>
[updated for kernel 5.10]
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
[update to 1.5.12.4, switch to tag tarball]
Signed-off-by: Andre Heider <a.heider@gmail.com>
[add working software data path]
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
Signed-off-by: Andre Heider <a.heider@gmail.com>
