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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3e6e0d8094
We found reassignment can not find a range for one resource, even if the
total available range is large enough.
bridge b1:02.0 will need 2M+3M
bridge b1:03.0 will need 2M+3M
so bridge b0:00.0 will get assigned: 4M : [f8000000-f83fffff]
later is reassigned to 10M : [f8000000-f9ffffff]
b1:02.0 is assigned to 2M : [f8000000-f81fffff]
b1:03.0 is assigned to 2M : [f8200000-f83fffff]
After that b1:03.0 get chance to be reassigned to [f8200000-f86fffff],
but b1:02.0 will not have chance to expand, because b1:03.0 is using in
middle one.
[ 187.911401] pci 0000:b1:02.0: bridge window [mem 0x00100000-0x002fffff] to [bus b2-b2] add_size 300000
[ 187.920764] pci 0000:b1:03.0: bridge window [mem 0x00100000-0x002fffff] to [bus b3-b3] add_size 300000
[ 187.930129] pci 0000:b1:02.0: [mem 0x00100000-0x002fffff] get_res_add_size add_size 300000
[ 187.938500] pci 0000:b1:03.0: [mem 0x00100000-0x002fffff] get_res_add_size add_size 300000
[ 187.946857] pci 0000:b0:00.0: bridge window [mem 0x00100000-0x004fffff] to [bus b1-b3] add_size 600000
[ 187.956206] pci 0000:b0:00.0: BAR 14: assigned [mem 0xf8000000-0xf83fffff]
[ 187.963102] pci 0000:b0:00.0: BAR 15: assigned [mem 0xf5000000-0xf51fffff pref]
[ 187.970434] pci 0000:b0:00.0: BAR 14: reassigned [mem 0xf8000000-0xf89fffff]
[ 187.977497] pci 0000:b1:02.0: BAR 14: assigned [mem 0xf8000000-0xf81fffff]
[ 187.984383] pci 0000:b1:02.0: BAR 15: assigned [mem 0xf5000000-0xf50fffff pref]
[ 187.991695] pci 0000:b1:03.0: BAR 14: assigned [mem 0xf8200000-0xf83fffff]
[ 187.998576] pci 0000:b1:03.0: BAR 15: assigned [mem 0xf5100000-0xf51fffff pref]
[ 188.005888] pci 0000:b1:03.0: BAR 14: reassigned [mem 0xf8200000-0xf86fffff]
[ 188.012939] pci 0000:b1:02.0: BAR 14: can't assign mem (size 0x200000)
[ 188.019471] pci 0000:b1:02.0: failed to add 300000 to res=[mem 0xf8000000-0xf81fffff]
[ 188.027326] pci 0000:b2:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit]
[ 188.034071] pci 0000:b2:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit]
[ 188.040795] pci 0000:b2:00.0: BAR 2: assigned [mem 0xf8000000-0xf80fffff 64bit]
[ 188.048119] pci 0000:b2:00.0: BAR 2: set to [mem 0xf8000000-0xf80fffff 64bit] (PCI address [0xf8000000-0xf80fffff])
[ 188.058550] pci 0000:b2:00.0: BAR 6: assigned [mem 0xf5000000-0xf50fffff pref]
[ 188.065802] pci 0000:b2:00.0: BAR 0: assigned [mem 0xf8100000-0xf8103fff 64bit]
[ 188.073125] pci 0000:b2:00.0: BAR 0: set to [mem 0xf8100000-0xf8103fff 64bit] (PCI address [0xf8100000-0xf8103fff])
[ 188.083596] pci 0000:b2:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit]
[ 188.090310] pci 0000:b2:00.0: BAR 9: can't assign mem (size 0x300000)
[ 188.096773] pci 0000:b2:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit]
[ 188.103479] pci 0000:b2:00.0: BAR 7: assigned [mem 0xf8104000-0xf810ffff 64bit]
[ 188.110801] pci 0000:b2:00.0: BAR 7: set to [mem 0xf8104000-0xf810ffff 64bit] (PCI address [0xf8104000-0xf810ffff])
[ 188.121256] pci 0000:b1:02.0: PCI bridge to [bus b2-b2]
[ 188.126512] pci 0000:b1:02.0: bridge window [mem 0xf8000000-0xf81fffff]
[ 188.133328] pci 0000:b1:02.0: bridge window [mem 0xf5000000-0xf50fffff pref]
[ 188.140608] pci 0000:b3:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit]
[ 188.147341] pci 0000:b3:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit]
[ 188.154076] pci 0000:b3:00.0: BAR 2: assigned [mem 0xf8200000-0xf82fffff 64bit]
[ 188.161417] pci 0000:b3:00.0: BAR 2: set to [mem 0xf8200000-0xf82fffff 64bit] (PCI address [0xf8200000-0xf82fffff])
[ 188.171865] pci 0000:b3:00.0: BAR 6: assigned [mem 0xf5100000-0xf51fffff pref]
[ 188.179090] pci 0000:b3:00.0: BAR 0: assigned [mem 0xf8300000-0xf8303fff 64bit]
[ 188.186431] pci 0000:b3:00.0: BAR 0: set to [mem 0xf8300000-0xf8303fff 64bit] (PCI address [0xf8300000-0xf8303fff])
[ 188.196884] pci 0000:b3:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit]
[ 188.203591] pci 0000:b3:00.0: BAR 9: assigned [mem 0xf8400000-0xf86fffff 64bit]
[ 188.210909] pci 0000:b3:00.0: BAR 9: set to [mem 0xf8400000-0xf86fffff 64bit] (PCI address [0xf8400000-0xf86fffff])
[ 188.221379] pci 0000:b3:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit]
[ 188.228089] pci 0000:b3:00.0: BAR 7: assigned [mem 0xf8304000-0xf830ffff 64bit]
[ 188.235407] pci 0000:b3:00.0: BAR 7: set to [mem 0xf8304000-0xf830ffff 64bit] (PCI address [0xf8304000-0xf830ffff])
[ 188.245843] pci 0000:b1:03.0: PCI bridge to [bus b3-b3]
[ 188.251107] pci 0000:b1:03.0: bridge window [mem 0xf8200000-0xf86fffff]
[ 188.257922] pci 0000:b1:03.0: bridge window [mem 0xf5100000-0xf51fffff pref]
[ 188.265180] pci 0000:b0:00.0: PCI bridge to [bus b1-b3]
[ 188.270443] pci 0000:b0:00.0: bridge window [mem 0xf8000000-0xf89fffff]
[ 188.277250] pci 0000:b0:00.0: bridge window [mem 0xf5000000-0xf51fffff pref]
[ 188.284512] pcieport 0000:80:02.2: PCI bridge to [bus b0-bf]
[ 188.290184] pcieport 0000:80:02.2: bridge window [io 0xa000-0xbfff]
[ 188.296735] pcieport 0000:80:02.2: bridge window [mem 0xf8000000-0xf8ffffff]
[ 188.303963] pcieport 0000:80:02.2: bridge window [mem 0xf5000000-0xf5ffffff 64bit pref]
Thus b2:00.0 BAR 9 does not get assigned...
root cause:
b1:02.0 can not be added more range, because b1:03.0 is just after it;
no space between the required ranges.
Solution:
Try to assign required + optional all together at first, and if that
fails, try again with just the required resources.
-v2: seperate add_to_list change() to another patch according to Jesse.
seperate get_res_add_size() moving to another patch according to Jesse.
add !realloc_head->next check if the list is empty to bail early
according to Jesse.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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|---|---|---|
| .. | ||
| hotplug | ||
| pcie | ||
| .gitignore | ||
| access.c | ||
| ats.c | ||
| bus.c | ||
| hotplug-pci.c | ||
| hotplug.c | ||
| htirq.c | ||
| ioapic.c | ||
| iov.c | ||
| irq.c | ||
| Kconfig | ||
| Makefile | ||
| msi.c | ||
| msi.h | ||
| of.c | ||
| pci-acpi.c | ||
| pci-driver.c | ||
| pci-label.c | ||
| pci-stub.c | ||
| pci-sysfs.c | ||
| pci.c | ||
| pci.h | ||
| probe.c | ||
| proc.c | ||
| quirks.c | ||
| remove.c | ||
| rom.c | ||
| search.c | ||
| setup-bus.c | ||
| setup-irq.c | ||
| setup-res.c | ||
| slot.c | ||
| syscall.c | ||
| vpd.c | ||
| xen-pcifront.c | ||