On Thu, 26 Mar 2026 16:52:20 -0700 Joe Damato wrote:

Add struct tso_dma_map to tso.h for tracking DMA addresses of mapped
GSO payload data.

The struct combines DMA mapping storage with iterator state, allowing
drivers to walk pre-mapped DMA regions linearly. Includes fields for
the DMA IOVA path (iova_state, iova_offset, total_len) and a fallback
per-region path (linear_dma, frags[], frag_idx, offset).

Helpers to initialize and operate on this struct will be added in the
next commit.

Let's squash this with patch 2? Quite useful to see the struct when
reviewing the code..