On Fri, 2019-04-12 at 16:44 +1000, Alexey Kardashevskiy wrote:
> This is an attempt to allow DMA mask 40 or similar which are not
> large
> enough to use either a PHB3 bypass mode or a sketchy bypass.
>
> This is based on sha1
> 582549e3fbe1 Linus Torvalds Merge tag 'for-linus' of
> git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
>
> Please comment. Thanks.
Seems to uniformly fail on POWER8 and sometimes on P9 too.
On P8:
[ 2.423206] Failed to allocate a TCE memory, level shift=26
[ 2.423351] pci 0001:03 : [PE# fd] Failed to create 32-bit TCE
table, err -12
On P9:
[ 0.303055] pci 0003:01 : [PE# 1fd] Setting up 32-bit TCE table
at 0..80000000
[ 0.303119] Failed to allocate a TCE memory, level shift=30
[ 0.303147] pci 0003:01 : [PE# 1fd] Failed to create 32-bit TCE
table, err -12
Is it selecting the wrong TCE size?
> Alexey Kardashevskiy (2):
powerpc/powernv/ioda: Allocate TCE table
> levels on demand for default
DMA window
powerpc/powernv/ioda2:
> Create bigger default window with 64k IOMMU
pages
arch/powerpc/include/asm/iommu.h | 8 ++-
arch/powerpc/platforms/powernv/pci.h | 2 +-
arch/powerpc/kernel/iommu.c | 58 +++++++++++++--
----
arch/powerpc/platforms/powernv/pci-ioda-tce.c | 19 +++---
arch/powerpc/platforms/powernv/pci-ioda.c | 14 ++++-
5 files changed, 66 insertions(+), 35 deletions(-)
