On Tue, 10 Mar 2020 at 10:34, Michael Walle <michael@xxxxxxxx> wrote: > > So starting with XSPI, if you have a big flash and cancel the readout > strange things happen. > > # hexdump -C /dev/mtd0 > 00000000 00 75 68 75 0a ff ff ff ff ff ff ff ff ff ff ff > |.uhu............| > 00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > |................| > * > ^C[ 35.487948] fsl-dspi 2120000.spi: Waiting for transfer to complete > failed! > [ 35.495038] spi_master spi2: failed to transfer one message from > queue > This, I think, is expected. > # hexdump -C /dev/mtd0 > 00000000 00 75 68 75 0a ff ff ff ff ff ff ff ff ff ff ff > |.uhu............| > 00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > |................| > * > ^C[ 38.495955] fsl-dspi 2120000.spi: Waiting for transfer to complete > failed! > [ 38.503097] spi_master spi2: failed to transfer one message from > queue > [ 38.509729] Unable to handle kernel paging request at virtual address > ffff800095ab3377 > [ 38.517676] Mem abort info: > [ 38.520474] ESR = 0x96000045 > [ 38.523533] EC = 0x25: DABT (current EL), IL = 32 bits > [ 38.528861] SET = 0, FnV = 0 > [ 38.531921] EA = 0, S1PTW = 0 > [ 38.535067] Data abort info: > [ 38.537952] ISV = 0, ISS = 0x00000045 > [ 38.541797] CM = 0, WnR = 1 > [ 38.544771] swapper pgtable: 4k pages, 48-bit VAs, > pgdp=0000000082621000 > [ 38.551494] [ffff800095ab3377] pgd=00000020fffff003, > p4d=00000020fffff003, pud=0000000000000000 > [ 38.560229] Internal error: Oops: 96000045 [#1] PREEMPT SMP > [ 38.565819] Modules linked in: > [ 38.568882] CPU: 0 PID: 2729 Comm: hexdump Not tainted > 5.6.0-rc4-next-20200306-00052-gd8730cdc8a0b-dirty #193 > [ 38.578834] Hardware name: Kontron SMARC-sAL28 (Single PHY) on SMARC > Eval 2.0 carrier (DT) > [ 38.587129] pstate: 20000085 (nzCv daIf -PAN -UAO) > [ 38.591941] pc : ktime_get_real_ts64+0x3c/0x110 > [ 38.596487] lr : spi_take_timestamp_pre+0x40/0x90 > [ 38.601203] sp : ffff800010003d90 > [ 38.604525] x29: ffff800010003d90 x28: ffff80001200e000 > [ 38.609854] x27: ffff800011da9000 x26: ffff002079c40400 > [ 38.615184] x25: ffff8000117fe018 x24: ffff800011daa1a0 > [ 38.620513] x23: ffff800015ab3860 x22: ffff800095ab3377 > [ 38.625841] x21: 000000000000146e x20: ffff8000120c3000 > [ 38.631170] x19: ffff0020795f6e80 x18: ffff800011da9948 > [ 38.636498] x17: 0000000000000000 x16: 0000000000000000 > [ 38.641826] x15: ffff800095ab3377 x14: 0720072007200720 > [ 38.647155] x13: 0720072007200765 x12: 0775076507750771 > [ 38.652483] x11: 0720076d076f0772 x10: 0000000000000040 > [ 38.657812] x9 : ffff8000108e2100 x8 : ffff800011dcabe8 > [ 38.663139] x7 : 0000000000000000 x6 : ffff800015ab3a60 > [ 38.668468] x5 : 0000000007200720 x4 : ffff800095ab3377 > [ 38.673796] x3 : 0000000000000000 x2 : 0000000000000ab0 > [ 38.679125] x1 : ffff800011daa000 x0 : 0000000000000026 > [ 38.684454] Call trace: > [ 38.686905] ktime_get_real_ts64+0x3c/0x110 > [ 38.691100] spi_take_timestamp_pre+0x40/0x90 > [ 38.695470] dspi_fifo_write+0x58/0x2c0 > [ 38.699315] dspi_interrupt+0xbc/0xd0 > [ 38.702987] __handle_irq_event_percpu+0x78/0x2c0 > [ 38.707706] handle_irq_event_percpu+0x3c/0x90 > [ 38.712161] handle_irq_event+0x4c/0xd0 > [ 38.716008] handle_fasteoi_irq+0xbc/0x170 > [ 38.720115] generic_handle_irq+0x2c/0x40 > [ 38.724135] __handle_domain_irq+0x68/0xc0 > [ 38.728243] gic_handle_irq+0xc8/0x160 > [ 38.732000] el1_irq+0xb8/0x180 > [ 38.735149] spi_nor_spimem_read_data+0xe0/0x140 > [ 38.739779] spi_nor_read+0xc4/0x120 > [ 38.743364] mtd_read_oob+0xa8/0xc0 > [ 38.746860] mtd_read+0x4c/0x80 > [ 38.750007] mtdchar_read+0x108/0x2a0 > [ 38.753679] __vfs_read+0x20/0x50 > [ 38.757002] vfs_read+0xa4/0x190 > [ 38.760237] ksys_read+0x6c/0xf0 > [ 38.763471] __arm64_sys_read+0x20/0x30 > [ 38.767319] el0_svc_common.constprop.3+0x90/0x160 > [ 38.772125] do_el0_svc+0x28/0x90 > [ 38.775449] el0_sync_handler+0x118/0x190 > [ 38.779468] el0_sync+0x140/0x180 > [ 38.782793] Code: 91000294 1400000f d50339bf f9405e80 (f90002c0) > [ 38.788910] ---[ end trace 55da560db4d6bef7 ]--- > [ 38.793540] Kernel panic - not syncing: Fatal exception in interrupt > [ 38.799914] SMP: stopping secondary CPUs > [ 38.803849] Kernel Offset: disabled > [ 38.807344] CPU features: 0x10002,20006008 > [ 38.811451] Memory Limit: none > [ 38.814513] ---[ end Kernel panic - not syncing: Fatal exception in > interrupt ]--- > And this, I think, isn't. I've sent a new patch that addresses this in v3, although it's always been like this as far as I can tell. > > > In DMA mode one byte writes seem to work. But at least 5 byte writes do > not: > > # echo -ne '\x00' > /dev/mtd10 > # echo 'huhu' > /dev/mtd10 > [ 34.275383] fsl-dspi 2120000.spi: DMA tx timeout > [ 34.280035] fsl-dspi 2120000.spi: DMA transfer failed > [ 34.285116] fsl-dspi 2120000.spi: Waiting for transfer to complete > failed! > [ 34.292029] spi_master spi2: failed to transfer one message from > queue > sh: write error: Connection timed out > # > Correct, thanks for pointing out. Fixed this in v3. > Vladimir, what kind of SPI device do you have to test? > > -michael > spidev_test --input <file-generated-with-hex-editor> and watch the output with a protocol analyzer. Thanks, -Vladimir
