RDMA/hns: Simplify 'struct hns_roce_hem' allocation
'struct hns_roce_hem' is used to refer to the last level of dma buffer managed by the hw, pointed by a single BA(base address) in the previous level of BT(base table), so the dma buffer in 'struct hns_roce_hem' must be contiguous. Right now the size of dma buffer in 'struct hns_roce_hem' is decided by mhop->buf_chunk_size in get_hem_table_config(), which ensure the mhop->buf_chunk_size is power of two of PAGE_SIZE, so there will be only one contiguous dma buffer allocated in hns_roce_alloc_hem(), which means hem->chunk_list and chunk->mem for linking multi dma buffers is unnecessary. This patch removes the hem->chunk_list and chunk->mem and other related macro and function accordingly. Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com> Link: https://lore.kernel.org/r/20240113085935.2838701-7-huangjunxian6@hisilicon.comSigned-off-by: Leon Romanovsky <leon@kernel.org>
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