diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mem.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mem.c | 58 |
1 files changed, 55 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c index dae07eae9507..5f7b30147180 100644 --- a/drivers/infiniband/hw/mlx5/mem.c +++ b/drivers/infiniband/hw/mlx5/mem.c @@ -32,6 +32,7 @@ #include <linux/module.h> #include <rdma/ib_umem.h> +#include <rdma/ib_umem_odp.h> #include "mlx5_ib.h" /* @umem: umem object to scan @@ -57,6 +58,17 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift, int entry; unsigned long page_shift = ilog2(umem->page_size); + /* With ODP we must always match OS page size. */ + if (umem->odp_data) { + *count = ib_umem_page_count(umem); + *shift = PAGE_SHIFT; + *ncont = *count; + if (order) + *order = ilog2(roundup_pow_of_two(*count)); + + return; + } + addr = addr >> page_shift; tmp = (unsigned long)addr; m = find_first_bit(&tmp, sizeof(tmp)); @@ -108,8 +120,32 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift, *count = i; } +#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING +static u64 umem_dma_to_mtt(dma_addr_t umem_dma) +{ + u64 mtt_entry = umem_dma & ODP_DMA_ADDR_MASK; + + if (umem_dma & ODP_READ_ALLOWED_BIT) + mtt_entry |= MLX5_IB_MTT_READ; + if (umem_dma & ODP_WRITE_ALLOWED_BIT) + mtt_entry |= MLX5_IB_MTT_WRITE; + + return mtt_entry; +} +#endif + +/* + * Populate the given array with bus addresses from the umem. + * + * dev - mlx5_ib device + * umem - umem to use to fill the pages + * page_shift - determines the page size used in the resulting array + * pas - bus addresses array to fill + * access_flags - access flags to set on all present pages. + use enum mlx5_ib_mtt_access_flags for this. + */ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem, - int page_shift, __be64 *pas, int umr) + int page_shift, __be64 *pas, int access_flags) { unsigned long umem_page_shift = ilog2(umem->page_size); int shift = page_shift - umem_page_shift; @@ -120,6 +156,23 @@ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem, int len; struct scatterlist *sg; int entry; +#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING + const bool odp = umem->odp_data != NULL; + + if (odp) { + int num_pages = ib_umem_num_pages(umem); + + WARN_ON(shift != 0); + WARN_ON(access_flags != (MLX5_IB_MTT_READ | MLX5_IB_MTT_WRITE)); + + for (i = 0; i < num_pages; ++i) { + dma_addr_t pa = umem->odp_data->dma_list[i]; + + pas[i] = cpu_to_be64(umem_dma_to_mtt(pa)); + } + return; + } +#endif i = 0; for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) { @@ -128,8 +181,7 @@ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem, for (k = 0; k < len; k++) { if (!(i & mask)) { cur = base + (k << umem_page_shift); - if (umr) - cur |= 3; + cur |= access_flags; pas[i >> shift] = cpu_to_be64(cur); mlx5_ib_dbg(dev, "pas[%d] 0x%llx\n", |