Colin Percival 782105f7c8 vtblk: Use busdma ... We assume that bus addresses from busdma are the same thing as "physical" addresses in the Virtio specification; this seems to be true for the platforms on which Virtio is currently supported. For block devices which are limited to a single data segment per I/O, we request PAGE_SIZE alignment from busdma; this is necessary in order to support unaligned I/Os from userland, which may cross a boundary between two non-physically-contiguous pages. On devices which support more data segments per I/O, we retain the existing behaviour of limiting I/Os to (max data segs - 1) * PAGE_SIZE. Reviewed by: bryanv Sponsored by: https://www.patreon.com/cperciva Differential Revision: https://reviews.freebsd.org/D36667		2022-10-17 23:02:21 -07:00
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virtio_blk.c	vtblk: Use busdma	2022-10-17 23:02:21 -07:00
virtio_blk.h	virtio_blk: Add modern (V1) support	2021-01-19 04:55:24 +00:00