Re: [PATCH 2/2] riscv: dts: spacemit: k3: Add PCIe device node

[Inochi Amaoto <inochiama@gmail.com>]

On Sun, Jul 12, 2026 at 11:13:07PM -0500, Anirudh Srinivasan wrote:
> Hi Inochi,
> 
> On Thu, Jul 09, 2026 at 12:04:14PM +0800, Inochi Amaoto wrote:
> > Add all PCIe device node for Spacemit K3.
> > 
> > Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
> > ---
> >  arch/riscv/boot/dts/spacemit/k3-pico-itx.dts |  38 ++++
> >  arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi |  33 ++++
> >  arch/riscv/boot/dts/spacemit/k3.dtsi         | 195 +++++++++++++++++++
> >  3 files changed, 266 insertions(+)
> > 
> 
> I see some warnings printed during probe
> 
> [   10.842955] r8169 0002:01:00.0: of_irq_parse_pci: failed with rc=-22
> 
> [   10.937754] rtw89_8852be 0004:01:00.0: of_irq_parse_pci: failed with rc=-22
> 

This is an expected error because the driver does not support INTx
but the hardware claims it supports. Since the vendor does not want
to support it, so there is no way for the upstreamer to add this.

> I see that all the 3 rc nodes are missing an interrupts node and an
> interrupt parent (saplic). The vendor DT seems to have this. Not sure if
> this is related.
> 
> The 10G ethernet probes fine, but the wifi card fails to probe. Seems
> like the card is trying to request 32 bit DMA addresses and we're
> failing cause we have 64 bit memory only.
> The vendor kernel seems to have a patch to enable 36 bit DMA in
> the rtw89 driver. That'll probably fix this.
> 

This warning is also found on my test, it is not related to
the PCIe driver, but a lack of the RTL phy driver. :(

You may also noticed a bad performance on this 10G ethernet,
it is caused by the single queue used by the RTL driver.
IIRC, even 9800 X3D can not achieve the max speed.

Regards,
Inochi

> [   10.937754] rtw89_8852be 0004:01:00.0: of_irq_parse_pci: failed with rc=-22
> [   10.987983] rtw89_8852be 0004:01:00.0: loaded firmware rtw89/rtw8852b_fw-2.bin
> [   10.988151] rtw89_8852be 0004:01:00.0: enabling device (0000 -> 0003)
> [   10.988215] (udev-worker): page allocation failure: order:2, mode:0xcc4(GFP_KERNEL|GFP_DMA32), nodemask=(null),cpuset=/,mems_allowed=0
> [   10.988243] CPU: 5 UID: 0 PID: 503 Comm: (udev-worker) Not tainted 7.2.0-rc1-00034-gc57907b4459d #1 PREEMPT(lazy)
> [   10.988249] Hardware name: SpacemiT K3 Pico-ITX (DT)
> [   10.988252] Call Trace:
> [   10.988255] [<ffffffff8001f2b8>] dump_backtrace+0x28/0x48
> [   10.988265] [<ffffffff80002612>] show_stack+0x3a/0x58
> [   10.988269] [<ffffffff80016432>] dump_stack_lvl+0x5a/0x88
> [   10.988274] [<ffffffff80016478>] dump_stack+0x18/0x22
> [   10.988277] [<ffffffff803984da>] warn_alloc+0x102/0x120
> [   10.988283] [<ffffffff80398b7a>] __alloc_frozen_pages_noprof+0x682/0x1470 
> [   10.988288] [<ffffffff80399980>] __alloc_pages_noprof+0x18/0x38
> [   10.988292] [<ffffffff80113494>] __dma_direct_alloc_pages.isra.0+0x26c/0x428
> [   10.988298] [<ffffffff801137a8>] dma_direct_alloc+0x78/0x3d0
> [   10.988301] [<ffffffff8011282c>] dma_alloc_attrs+0x74/0x240
> [   10.988309] [<ffffffff031a6bb6>] rtw89_pci_probe+0x20e/0xc90 [rtw89_pci]
> [   10.988375] [<ffffffff8087cd1c>] local_pci_probe+0x3c/0x90
> [   10.988381] [<ffffffff8087def6>] pci_device_probe+0xde/0x298
> [   10.988385] [<ffffffff80a80f3e>] really_probe+0x9e/0x3e0
> [   10.988390] [<ffffffff80a81308>] __driver_probe_device+0x88/0x190
> [   10.988393] [<ffffffff80a814f8>] driver_probe_device+0x38/0xc0
> [   10.988396] [<ffffffff80a81796>] __driver_attach+0xbe/0x208
> [   10.988399] [<ffffffff80a7e22c>] bus_for_each_dev+0x6c/0xd0
> [   10.988404] [<ffffffff80a806ce>] driver_attach+0x26/0x40
> [   10.988407] [<ffffffff80a7fcac>] bus_add_driver+0x15c/0x298
> [   10.988410] [<ffffffff80a82a82>] driver_register+0x52/0x118
> [   10.988413] [<ffffffff8087c44c>] __pci_register_driver+0x4c/0x70
> [   10.988417] [<ffffffff02fbc038>] rtw89_8852be_driver_init+0x30/0xff8 [rtw89_8852be]
> [   10.988422] [<ffffffff80017b2a>] do_one_initcall+0x5a/0x2d0
> [   10.988427] [<ffffffff8011d7b6>] do_init_module+0x96/0x2c0
> [   10.988430] [<ffffffff8011f6c6>] load_module+0x19a6/0x2078
> [   10.988434] [<ffffffff80120046>] init_module_from_file+0xce/0x138
> [   10.988437] [<ffffffff801202d0>] __riscv_sys_finit_module+0x220/0x398
> [   10.988441] [<ffffffff81010c40>] do_trap_ecall_u+0x108/0x588
> [   10.988446] [<ffffffff81022a14>] handle_exception+0x16c/0x178
> [   10.988455] Mem-Info:
> [   10.988483] active_anon:5773 inactive_anon:0 isolated_anon:0
>                 active_file:0 inactive_file:30149 isolated_file:0
>                 unevictable:0 dirty:222 writeback:0
>                 slab_reclaimable:3461 slab_unreclaimable:8595
>                 mapped:5588 shmem:115 pagetables:949
>                 sec_pagetables:0 bounce:0
>                 kernel_misc_reclaimable:0
>                 free:4028911 free_pcp:0 free_cma:0
> [   10.988493] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
> [   10.988497] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=64kB
> [   10.988501] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 
> [   10.988505] 30300 total pagecache pages
> [   10.988508] 0 pages in swap cache
> [   10.988511] Free swap  = 0kB
> [   10.988514] Total swap = 0kB
> [   10.988516] 4186368 pages RAM
> [   10.988519] 0 pages HighMem/MovableOnly
> [   10.988522] 86381 pages reserved
> [   10.988525] 0 pages cma reserved
> [   10.988528] Memory cgroup min protection 0kB -- low protection 0kB
> [   10.988532] rtw89_8852be 0004:01:00.0: failed to alloc dma tx rings
> [   10.994421] rtw89_8852be 0004:01:00.0: failed to alloc pci trx rings
> [   11.000734] rtw89_8852be 0004:01:00.0: failed to setup pci resource
> [   11.007088] rtw89_8852be 0004:01:00.0: probe with driver rtw89_8852be failed with error -12
> 
> Regards
> Anirudh Srinivasan