On 29.10.2015 15:57, Sinan Kaya wrote:
On 10/28/2015 4:36 PM, Sinan Kaya wrote:
- The second problem is about the PCIe resources.
pci_0000:01:00.0:_can't_enable_device:_BAR_0_[mem_0x80100100000-0x80100101fff_64bit]_not_claimed
pci 0000:01:00.0: Can't enable PCI device, BIOS handoff failed. pci 0000:00:00.0: BAR 14: assigned [mem 0x80100100000-0x801003fffff] pci 0000:00:00.0: BAR 13: no space for [io size 0x1000] pci 0000:00:00.0: BAR 13: failed to assign [io size 0x1000] pci 0000:00:00.0: BAR 13: no space for [io size 0x1000] pci 0000:00:00.0: BAR 13: failed to assign [io size 0x1000] pci 0000:01:00.0: BAR 0: assigned [mem 0x80100100000-0x80100101fff 64bit]
For some reason, the kernel is unable to assign resources.
I appreciate any pointers you might give.
Tomasz, I debugged this part of the problem yesterday night.
I have one set up with 4.2 kernel and Mark Salter's original ACPI PCIE patch. His patchwork works fine with our ACPI table.
This is what IO resource looks like in our table. PCI IO is supported using the ACPI translation attribute on ARM systems.
QWORDIO( // produced resource ResourceProducer, // bit 0 of general flags is 0 MinFixed, // Range is fixed MaxFixed, // Range is fixed PosDecode, EntireRange, 0x0000, // Granularity 0x1000, // Min, 0xFFFF, // Max 0x8FFFFFEF000, // Translation 0xF000, // Range Length ,, PI00 )
It looks like you are missing the translation support for the IO aperture and Mark Salter's patch has this support.
Yours is missing in pci_acpi_root_prepare_resources function here. Mark's patch uses the offset argument to reorganize the resource.
resource_size_t length = res->end - res->start;err = pci_register_io_range(res->start, length);if (err) {resource_list_destroy_entry(entry);continue;}port = pci_address_to_pio(res->start);if (port == (unsigned long)-1) {resource_list_destroy_entry(entry);continue;}res->start = port;res->end = res->start + length - 1;if (pci_remap_iospace(res, res->start) < 0)resource_list_destroy_entry(entry);
Thanks for the heads up, working on it.
Regards, Tomasz