uvm(9): fo_mmap caller guarantees positive size.

No functional change intended, just sprinkling assertions to make it
clearer.

drm: Fix type confusion in drm_prime_lookup_buf_by_handle.

drm prime: Plug leak and tidy up.

drm: rb_tree_insert_node returns node, not NULL, on success

drm: Another pass over i915 and some supporting logic.

This makes a shim around sg_table, which essentially represents two
things:

1. an array of pages (roughly corresponding to bus_dma_segment_t[])
2. an array of DMA addresses stored in a bus_dmamap_t

Both parts are optional; different parts of i915 use sg_tables to
pass around one or both of the two parts. This helps to reduce the
ifdefs by quite a bit, although it's not always clear which part of
an sg_table any particular interface is actually using which is why I
was reluctant to do this before.

drm: Nix use of uvm pglist. Just use arrays of page pointers.

Fix up drm_prime.c.

Don't call drm_gem_dmabuf_mmap static, upstream doesn't (guessing)


Author: Maya Rashish <maya@NetBSD.org>

Cleanup ifdef goo that got mangled.

Endifs without matching ifdefs and so on.


Author: Maya Rashish <maya@NetBSD.org>

Redo drm prime trees with our rbtree abstraction.

Merge linux-drm-v5-6-rc3

Revert cosmetic changes.

Use a header file hack to cope with Linux/NetBSD namespace clashes.

Currently serves for:

ALIGN
mutex_init
mutex_destroy

branches: 1.7.6;
Check for DMA-safe addresses before allowing DRM prime import.

At chuq's suggestion, use paddr_t rather than struct vm_page *.

Doesn't make much of a substantive difference.

Rework drm prime guts.

- Our faux struct sg_table is now just an array of _pages_, not of
bus dma segments.

- We handle bus dma segments only in the presence of an adult bus dma
tag.

- All bus dma hacks are once again confined to bus_dma_hacks.h, and
more neatly organized:
. bus_dmamem_export_pages translates bus dma segs to vm_page array
. bus_dmamem_import_pages translates vm_page array to bus dma segs

Fill out drm_prime_* API a little more for NetBSD.

Add comment explaining our use of struct sg_table.

Draft support for drm prime.

merge linux-drm-v4-4-143

branches: 1.1.1;
Initial revision

drm: Fix type confusion in drm_prime_lookup_buf_by_handle.

drm prime: Plug leak and tidy up.

drm: rb_tree_insert_node returns node, not NULL, on success

drm: Another pass over i915 and some supporting logic.

This makes a shim around sg_table, which essentially represents two
things:

1. an array of pages (roughly corresponding to bus_dma_segment_t[])
2. an array of DMA addresses stored in a bus_dmamap_t

Both parts are optional; different parts of i915 use sg_tables to
pass around one or both of the two parts. This helps to reduce the
ifdefs by quite a bit, although it's not always clear which part of
an sg_table any particular interface is actually using which is why I
was reluctant to do this before.

drm: Nix use of uvm pglist. Just use arrays of page pointers.

Fix up drm_prime.c.

Don't call drm_gem_dmabuf_mmap static, upstream doesn't (guessing)


Author: Maya Rashish <maya@NetBSD.org>

Cleanup ifdef goo that got mangled.

Endifs without matching ifdefs and so on.


Author: Maya Rashish <maya@NetBSD.org>

Redo drm prime trees with our rbtree abstraction.

Merge linux-drm-v5-6-rc3

Revert cosmetic changes.

Use a header file hack to cope with Linux/NetBSD namespace clashes.

Currently serves for:

ALIGN
mutex_init
mutex_destroy

branches: 1.7.6;
Check for DMA-safe addresses before allowing DRM prime import.

At chuq's suggestion, use paddr_t rather than struct vm_page *.

Doesn't make much of a substantive difference.

Rework drm prime guts.

- Our faux struct sg_table is now just an array of _pages_, not of
bus dma segments.

- We handle bus dma segments only in the presence of an adult bus dma
tag.

- All bus dma hacks are once again confined to bus_dma_hacks.h, and
more neatly organized:
. bus_dmamem_export_pages translates bus dma segs to vm_page array
. bus_dmamem_import_pages translates vm_page array to bus dma segs

Fill out drm_prime_* API a little more for NetBSD.

Add comment explaining our use of struct sg_table.

Draft support for drm prime.

merge linux-drm-v4-4-143

branches: 1.1.1;
Initial revision

Revert cosmetic changes.

Use a header file hack to cope with Linux/NetBSD namespace clashes.

Currently serves for:

ALIGN
mutex_init
mutex_destroy

Check for DMA-safe addresses before allowing DRM prime import.

At chuq's suggestion, use paddr_t rather than struct vm_page *.

Doesn't make much of a substantive difference.

Rework drm prime guts.

- Our faux struct sg_table is now just an array of _pages_, not of
bus dma segments.

- We handle bus dma segments only in the presence of an adult bus dma
tag.

- All bus dma hacks are once again confined to bus_dma_hacks.h, and
more neatly organized:
. bus_dmamem_export_pages translates bus dma segs to vm_page array
. bus_dmamem_import_pages translates vm_page array to bus dma segs

Fill out drm_prime_* API a little more for NetBSD.

Add comment explaining our use of struct sg_table.

Draft support for drm prime.

merge linux-drm-v4-4-143

branches: 1.1.1;
Initial revision

Check for DMA-safe addresses before allowing DRM prime import.

At chuq's suggestion, use paddr_t rather than struct vm_page *.

Doesn't make much of a substantive difference.

Rework drm prime guts.

- Our faux struct sg_table is now just an array of _pages_, not of
bus dma segments.

- We handle bus dma segments only in the presence of an adult bus dma
tag.

- All bus dma hacks are once again confined to bus_dma_hacks.h, and
more neatly organized:
. bus_dmamem_export_pages translates bus dma segs to vm_page array
. bus_dmamem_import_pages translates vm_page array to bus dma segs

Fill out drm_prime_* API a little more for NetBSD.

Add comment explaining our use of struct sg_table.

Draft support for drm prime.

merge linux-drm-v4-4-143

branches: 1.1.1;
Initial revision