Re: MMCCAM hang

> On 28 Dec 2023, at 02.08, Warner Losh <imp@bsdimp.com> wrote:
> On Wed, Dec 27, 2023, 4:55 PM Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net <mailto:bzeeb-lists@lists.zabbadoz.net>> wrote:
>> Hi,
>> 
>> sdhci_fsl_fdt0: Desired SD/MMC freq: 50000000, actual: 50000000; base 700000000 prescale 1 divisor 14
>> GEOM: new disk sdda0
>> sdda0 at sdhci_slot0 bus 0 scbus0 target 0 lun 0
>> sdda0: Relative addr: 00000002
>> Card features: <MMC Memory High-Capacity>
>> Card random: unblocking device.
>> GEOM: new disk sdda0boot0
>> memory OCR: 00ff8080
>> sdda0: Serial Number .......
>> sdda0: MMCHC .................................. by 17 0x0000
>> GEOM: new disk sdda0boot1
>> uhub0: 2 ports with 2 removable, self powered
>> 
>> at which point basically anything hangs.  In auto-boot it is
>> before/during file-system checks.
>> In single user mode camcontrol devlist will show sdda0
>> but
>> 
>> root@:/ # gpart show sdda0
>> load: 6.06  cmd: gpart 24 [g_waitfor_event] 1.28r 0.00u 0.00s 0% 2088k
>> {forever}
>> 
>> 
>> Unclear at which point I broke to debugger and this is where it seems to
>> hang:
>> 
>> db> trace 100088
>> Tracing pid 4 tid 100088 td 0xffff0000dc527000
>> ipi_stop() at ipi_stop+0x34
>> arm_gic_v3_intr() at arm_gic_v3_intr+0xe4
>> intr_irq_handler() at intr_irq_handler+0x80
>> handle_el1h_irq() at handle_el1h_irq+0x14
>> --- interrupt
>> spinlock_exit() at spinlock_exit+0x44
>> callout_reset_sbt_on() at callout_reset_sbt_on+0x210
>> sdhci_cam_action() at sdhci_cam_action+0x284
>> xpt_run_devq() at xpt_run_devq+0x4c8
>> xpt_action_default() at xpt_action_default+0x470
>> sddastart() at sddastart+0x1bc
>> xpt_run_allocq() at xpt_run_allocq+0xa8
>> xpt_done_process() at xpt_done_process+0x610
>> xpt_done_td() at xpt_done_td+0x1a8
>> fork_exit() at fork_exit+0x8c
>> fork_trampoline() at fork_trampoline+0x18
>> 
>> 
>> Anyone an idea?
> 
> 
> 
> Looks like deadlock with another thread. Anybody else in the time keeping / callout code?

I think this is related to the MMC driver having issues (MMCCAM or not).
If I try to use a MMC sdcard on any of my rk35X8 boards as the disk device it will eventually hang on first access to the MMC controlled media.
I thought I had an issue here with my dev setup but clealy I'm not alone :)

--
Søren Schmidt
sos@deepcore.dk / sos@freebsd.org
"So much code to hack, so little time"