On Thu, Aug 17, 2023 at 06:21:50PM +0800, Cheng Xu wrote:
> Currently our MTT only support inline mtt entries (0 level MTT) and
> indirect MTT entries (1 level mtt), which will limit the maximum length
> of MRs. In order to implement a multi-level MTT, we refactor the
> structure of MTT first.
>
> Signed-off-by: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
> ---
> drivers/infiniband/hw/erdma/erdma_hw.h | 4 +-
> drivers/infiniband/hw/erdma/erdma_qp.c | 2 +-
> drivers/infiniband/hw/erdma/erdma_verbs.c | 214 +++++++++++++---------
> drivers/infiniband/hw/erdma/erdma_verbs.h | 26 ++-
> 4 files changed, 152 insertions(+), 94 deletions(-)
<...>
> +/* Hierarchical storage structure for MTT entries */
> +struct erdma_mtt {
> + u64 *buf;
> + size_t size;
> +
> + bool continuous;
> + union {
> + dma_addr_t buf_dma;
> + struct {
> + struct scatterlist *sglist;
> + u32 nsg;
> + u32 level;
> + };
> + };
> +
> + struct erdma_mtt *low_level;
This variable is used in third patch only, but please don't resubmit yet.
Thanks
