Surprisingly, I managed to compile a kernel way faster than what I expected.
This didn't help. ddb> show panic *cpu0: _dmamap_sync: ran off map! ddb> bt panic() at panic+0xfe _dmamem_alloc() at _dmamem_alloc ehci_idone() at ehci_idone+0x17e ehci_softintr() at ehci_softintr+0xfe softintr_dispatch() at softintr_dispatch+0x76 riscv_do_pending_intr() at riscv_do_pending_intr+0x94 plic_irq_dispatch() at plic_irq_dispatch+0xde plic_irq_handler() at plic_irq_handler+0x3e riscv_cpu_intr() at riscv_cpu_intr+0x20 cpu_exception_handler_supervisor() at cpu_exception_handler_supervisor+0x7a sched_idle() at sched_idle+0x126 proc_trampoline() at proc_trampoline+0xc end trace frame: 0x0, count: -12 ddb> show reg ra 0xffffffc00066c88c panic+0xfe sp 0xffffffc0407fda60 gp 0 tp 0 t0 0x8000000000000009 t1 0xffffffc000449a18 db_format+0x6a t2 0x1 s0 0xffffffc0407fda70 s1 0x1 a0 0x1 a1 0x242c670fb96e3cfe a2 0x242c670fb96e3cfe a3 0 a4 0xffffffffffffffff a5 0xffffffc00066ba54 generic_space_write_4 a6 0x1 a7 0 s2 0xffffffc000879434 substchar+0x222de s3 0 s4 0xffffc149 s5 0 s6 0x28 s7 0xffffffc000a33a58 cpu_dcache_wbinv_range s8 0x1 s9 0xb s10 0x1 s11 0xffffffc000938bd0 ohci_fdt_ca+0x30 t3 0x3 t4 0x22 t5 0xa6016320 t6 0x7edcc095 panic+0xfe: addi a0,zero,256 Also, I'm not sure this is correct. sqh->offs is used exclusively for usb_syncmem calls, which takes the shared dma. On Sun, Feb 02, 2025 at 04:38:49PM +0000, Miod Vallat wrote: > > >Synopsis: kernel panic: cpu0: _dmamap_sync: ran off map! > > Does this diff help? It looks to me that the offset being already taken > care of in ehci_alloc_sqh() when computing the physaddr field, it should > not be applied to the offs field either. > > Index: ehci.c > =================================================================== > RCS file: /OpenBSD/src/sys/dev/usb/ehci.c,v > diff -u -p -r1.222 ehci.c > --- ehci.c 11 Oct 2024 09:55:24 -0000 1.222 > +++ ehci.c 2 Feb 2025 16:36:40 -0000 > @@ -2268,7 +2268,7 @@ ehci_alloc_sqh(struct ehci_softc *sc) > sqh = KERNADDR(&dma, offs); > sqh->physaddr = DMAADDR(&dma, offs); > sqh->dma = dma; > - sqh->offs = offs; > + sqh->offs = 0; > sqh->next = sc->sc_freeqhs; > sc->sc_freeqhs = sqh; > } >
