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| author | Lucas Stach <l.stach@pengutronix.de> | 2019-08-02 15:27:33 +0300 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2019-08-15 13:07:47 +0300 |
| commit | 088880ddc0b20086b71bb87b805fb63ff07c35f2 (patch) | |
| tree | f4da28a492fc07725cf6091692f28ad935071d2a /drivers/gpu/drm/etnaviv/etnaviv_gem.c | |
| parent | 17eae23b08207a8954f77ca74caeaeb72a04da67 (diff) | |
| download | linux-088880ddc0b20086b71bb87b805fb63ff07c35f2.tar.xz | |
drm/etnaviv: implement softpin
With softpin we allow the userspace to take control over the GPU virtual
address space. The new capability is relected by a bump of the minor DRM
version. There are a few restrictions for userspace to take into
account:
1. The kernel reserves a bit of the address space to implement zero page
faulting and mapping of the kernel internal ring buffer. Userspace can
query the kernel for the first usable GPU VM address via
ETNAVIV_PARAM_SOFTPIN_START_ADDR.
2. We only allow softpin on GPUs, which implement proper process
separation via PPAS. If softpin is not available the softpin start
address will be set to ~0.
3. Softpin is all or nothing. A submit using softpin must not use any
address fixups via relocs.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gem.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gem.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index 8c62c5e0a494..401ce4512b8d 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -248,7 +248,8 @@ void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) } struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( - struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context) + struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context, + u64 va) { struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); struct etnaviv_vram_mapping *mapping; @@ -309,7 +310,7 @@ struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj, mmu_context->global->memory_base, - mapping, 0); + mapping, va); if (ret < 0) { etnaviv_iommu_context_put(mmu_context); kfree(mapping); |