[Sorry, resending. Sent HTML content by mistake] On Sat, Jun 12, 2021 at 12:07 PM Fabio Estevam <festevam@xxxxxxxxx> wrote: > > Hi, > > I am trying to run CAN stress tests on an i.MX8MM-based board that has two mcp2518fd chips. > I am using linux-next 20210607 and this is the ecspi dts: > https://pastebin.com/raw/YVvuqAAc > > Then I launch the test script: > ./cantest start > > This is the script content: > https://pastebin.com/raw/hc8gKgUf > > The problem is that RX FIFO overflow happens: > > [ 128.559485] mcp251xfd spi0.0 can0: RX-0: FIFO overflow. > [ 128.573478] mcp251xfd spi0.0 can0: RX-0: FIFO overflow. > [ 128.584787] mcp251xfd spi0.0 can0: RX-0: FIFO overflow. > > and also cansequence errors: > # 2020-02-09 01:41:15:368 sequence CNT: 2779938, RX: 8 expected: 34 missing: 230 skt overfl d: 0 a: 0 delta: 230 incident: 6 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 136 > 2020-02-09 01:41:15:368 sequence CNT: 9, RX: 34 expected: 9 missing: 25 skt overfl d: [ 899.794388] mcp251xfd spi0.0 can0: RX-0: FIFO overflow. > 0 a: 0 delta: 25 incident: 7 seq_wrap RX: 10860 [ 899.804780] mcp251xfd spi0.0 can0: RX-0: FIFO overflow. > sequ_wrap_expected: 10860 overall lost: 161 > 2020-02-09 01:41:15:370 sequence CNT: 40, RX: 9 expected: 40 missing: 225 skt overfl d: 0 a: 0 delta: 225 incident: 8 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 130 > 2020-02-09 01:41:15:392 sequence CNT: 137, RX: 105 expected: 137 missing: 224 skt overfl d: 0 a: 0 delta: 224 incident: 9 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 98 > 2020-02-09 01:41:15:396 sequence CNT: 137, RX: 145 expected: 137 missing: 8 skt overfl d: 0 a: 0 delta: 8 incident: 10 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 106 > 2020-02-09 01:41:15:403 sequence CNT: 160, ERRORFRAME 20000004 00 01 00 00 00 00 00 00 > 2020-02-09 01:41:15:414 sequence CNT: 192, ERRORFRAME 20000004 00 01 00 00 00 00 00 00 > 2020-02-09 01:41:15:414 sequence CNT: 192, RX: 210 expected: 192 missing: 18 skt overfl d: 0 a: 0 delta: 18 incident: 11 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 124 > 2020-02-09 01:41:15:416 sequence CNT: 220, RX: 222 expected: 220 missing: 2 skt overfl d: 0 a: 0 delta: 2 incident: 12 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 126 > > I have applied this series to get SPI DMA to work on i.MX8MM: > https://patches.linaro.org/cover/417924/ > > I have also tried SPI PIO mode instead of DMA, but it does not help. > > Any ideas of what can be done to improve this? > > Thanks! > > Fabio Estevam
