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gpu/intel: use CACHED dma buffers

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On x86, DMA buffers are actually always mapped as cached. We should
therefore actually ask for a cached buffer in order to avoid confusion.

genodelabs/genode#5000
This commit is contained in:
Johannes Schlatow 2023-10-03 15:52:46 +02:00 committed by Christian Helmuth
parent 579a5e7845
commit 0cf2b1be89
2 changed files with 2 additions and 2 deletions
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2
repos/os/src/drivers/gpu/intel/ggtt.h
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@ -154,7 +154,7 @@ class Igd::Ggtt
/* make the last entry/page unavailable */ /* make the last entry/page unavailable */
_num_entries((_size / 8) - 1), _num_entries((_size / 8) - 1),
_entries((uint64_t*)_base), _entries((uint64_t*)_base),
_scratch_page(platform, PAGE_SIZE, Genode::UNCACHED), _scratch_page(platform, PAGE_SIZE, Genode::CACHED),
_aperture_size(aperture_size), _aperture_size(aperture_size),
_aperture_entries(_aperture_size / PAGE_SIZE) _aperture_entries(_aperture_size / PAGE_SIZE)
{ {

2
repos/os/src/drivers/gpu/intel/main.cc
View File

@ -111,7 +111,7 @@ struct Igd::Device
return retry<Genode::Out_of_ram>( return retry<Genode::Out_of_ram>(
[&] () { [&] () {
return retry<Genode::Out_of_caps>( return retry<Genode::Out_of_caps>(
[&] () { return _pci.Client::alloc_dma_buffer(size, UNCACHED); }, [&] () { return _pci.Client::alloc_dma_buffer(size, CACHED); },
[&] () [&] ()
{ {
if (_env.pd().avail_caps().value < UPGRADE_CAPS) { if (_env.pd().avail_caps().value < UPGRADE_CAPS) {