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| author | Vladimir Kondratyev <wulf@FreeBSD.org> | 2026-09-13 17:25:12 +0000 |
|---|---|---|
| committer | Vladimir Kondratyev <wulf@FreeBSD.org> | 2026-09-13 17:25:12 +0000 |
| commit | a6b40d746b4b727b308f2437b41f8032b921a8e5 (patch) | |
| tree | 46522ccba43034258cfe39be61bbef3f5c2de44c /test/CodeGen/AArch64/arm64-dagcombiner-convergence.ll | |
| parent | f49dc19881d853b26dd675127f579f923dc87de2 (diff) | |
On Linux `dma_length` field of `struct scatterlist` is present on the
arches where DMA mapping code is able to coalesce adjacent segments
of physical address space. It contains total length of coalesced
segments while `length` field contains non-coalesced length of each
segment. On other arches `dma_length` is aliased to `length` field with
`sg_dma_len` macro. As FreeBSD does not merge scatterlist segments it
do not have `dma_length` field. It is appered that at least i915kms
driver depends on existence of `dma_length` field.
Add the field and disable it by default. To enable add to Makefile
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64" || \\
${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "powerpc"
CFLAGS+= -DCONFIG_NEED_SG_DMA_LENGTH
.endif
Reported by: Ryan Fahy
Reviewed by: bz
MFC after: 1 month
GHI: https://github.com/freebsd/drm-kmod/issues/315
Differential Revision: https://reviews.freebsd.org/D59630
Diffstat (limited to 'test/CodeGen/AArch64/arm64-dagcombiner-convergence.ll')
0 files changed, 0 insertions, 0 deletions