Re: MMCCAM hang

On Tue, 9 Jan 2024 11:36:32 +0100
Søren Schmidt <[email protected]> wrote:

> > On 28 Dec 2023, at 02.08, Warner Losh <[email protected]> wrote:
> > On Wed, Dec 27, 2023, 4:55?PM Bjoern A. Zeeb <[email protected] <mailto:[email protected]>> 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 :)

 SDCard on RK356X don't use sdhci but dwmmc so it's not related to what
bz@ is seeing.
 That being said I have no problem using dwmmc as the root device on my
nanopi r5s or quartz64.

-- 
Emmanuel Vadot <[email protected]> <[email protected]>