Re: Resizeable PCI BAR support V5

[Dieter NÃtzel]

Hello Christian,

I've running this since you've sent it on-top of amd-staging-4.11. But I 
think my poor little FUJITSU PRIMERGY TX150 S7, Xeon X3470 (Nehalem), 
PCIe 2.0, 24 GB is to old for this stuff...

[    1.066475] pci 0000:05:00.0: VF(n) BAR0 space: [mem 
0x00000000-0x0003ffff 64bit] (contains BAR0 for 16 VFs)
[    1.066489] pci 0000:05:00.0: VF(n) BAR2 space: [mem 
0x00000000-0x003fffff 64bit] (contains BAR2 for 16 VFs)
[    1.121656] pci 0000:00:1c.0: BAR 15: assigned [mem 
0x80000000-0x801fffff 64bit pref]
[    1.121659] pci 0000:00:1c.6: BAR 15: assigned [mem 
0x80200000-0x803fffff 64bit pref]
[    1.121662] pci 0000:01:00.0: BAR 6: assigned [mem 
0xb0120000-0xb013ffff pref]
[    1.121681] pci 0000:05:00.0: BAR 6: assigned [mem 
0xb0280000-0xb02fffff pref]
[    1.121683] pci 0000:05:00.0: BAR 9: no space for [mem size 
0x00400000 64bit]
[    1.121684] pci 0000:05:00.0: BAR 9: failed to assign [mem size 
0x00400000 64bit]
[    1.121685] pci 0000:05:00.0: BAR 7: no space for [mem size 
0x00040000 64bit]
[    1.121687] pci 0000:05:00.0: BAR 7: failed to assign [mem size 
0x00040000 64bit]
[    3.874180] amdgpu 0000:01:00.0: BAR 0: releasing [mem 
0xc0000000-0xcfffffff 64bit pref]
[    3.874182] amdgpu 0000:01:00.0: BAR 2: releasing [mem 
0xb0400000-0xb05fffff 64bit pref]
[    3.874198] pcieport 0000:00:03.0: BAR 15: releasing [mem 
0xb0400000-0xcfffffff 64bit pref]
[    3.874215] pcieport 0000:00:03.0: BAR 15: no space for [mem size 
0x300000000 64bit pref]
[    3.874217] pcieport 0000:00:03.0: BAR 15: failed to assign [mem size 
0x300000000 64bit pref]
[    3.874221] amdgpu 0000:01:00.0: BAR 0: no space for [mem size 
0x200000000 64bit pref]
[    3.874223] amdgpu 0000:01:00.0: BAR 0: failed to assign [mem size 
0x200000000 64bit pref]
[    3.874226] amdgpu 0000:01:00.0: BAR 2: no space for [mem size 
0x00200000 64bit pref]
[    3.874227] amdgpu 0000:01:00.0: BAR 2: failed to assign [mem size 
0x00200000 64bit pref]
[    3.874258] [drm] Not enough PCI address space for a large BAR.
[    3.874261] amdgpu 0000:01:00.0: BAR 0: assigned [mem 
0xc0000000-0xcfffffff 64bit pref]
[    3.874269] amdgpu 0000:01:00.0: BAR 2: assigned [mem 
0xb0400000-0xb05fffff 64bit pref]
[    3.874288] [drm] Detected VRAM RAM=8192M, BAR=256M

Anyway rebase for current amd-staging-4.11 needed.
Find attached dmesg-amd-staging-4.11-1.g7262353-default+.log.xz

Greetings,
Dieter

Am 09.06.2017 10:59, schrieb Christian KÃnig:
> Hi everyone,
>
> This is the fith incarnation of this set of patches. It enables device
> drivers to resize and most likely also relocate the PCI BAR of devices
> they manage to allow the CPU to access all of the device local memory 
> at once.
>
> This is very useful for GFX device drivers where the default PCI BAR is 
> only
> about 256MB in size for compatibility reasons, but the device easily 
> have
> multiple gigabyte of local memory.
>
> Some changes since V4:
> 1. Rebased on 4.11.
> 2. added the rb from Andy Shevchenko to patches which look complete 
> now.
> 3. Move releasing the BAR and reallocating it on error to the driver 
> side.
> 4. Add amdgpu support for GMC V6 hardware generation as well.
>
> Please review and/or comment,
> Christian.
>
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