From 6ebd062e0602f0571cf9abbe9eabd0e5f6ad0a39 Mon Sep 17 00:00:00 2001 From: Michael Baum Date: Tue, 9 Nov 2021 14:36:08 +0200 Subject: [PATCH] common/mlx5: glue MR registration with IOVA Add support for rdma-core API to register IOVA MR. The API gets the process VA, size, and IOVA and returns a memory region with space pointed by a specific IOVA. So any access in this MR should come with an address that is relative to the IOVA specified in the API. Fixes: cc07a42da250 ("vdpa/mlx5: prepare memory regions") Cc: stable@dpdk.org Signed-off-by: Michael Baum Signed-off-by: Matan Azrad --- drivers/common/mlx5/linux/meson.build | 2 ++ drivers/common/mlx5/linux/mlx5_glue.c | 18 ++++++++++++++++++ drivers/common/mlx5/linux/mlx5_glue.h | 3 +++ 3 files changed, 23 insertions(+) diff --git a/drivers/common/mlx5/linux/meson.build b/drivers/common/mlx5/linux/meson.build index 2dcd27b778..7909f23e21 100644 --- a/drivers/common/mlx5/linux/meson.build +++ b/drivers/common/mlx5/linux/meson.build @@ -200,6 +200,8 @@ has_sym_args = [ 'MLX5DV_DR_ACTION_FLAGS_ASO_CT_DIRECTION_INITIATOR' ], [ 'HAVE_MLX5_DR_ALLOW_DUPLICATE', 'infiniband/mlx5dv.h', 'mlx5dv_dr_domain_allow_duplicate_rules' ], + [ 'HAVE_MLX5_IBV_REG_MR_IOVA', 'infiniband/verbs.h', + 'ibv_reg_mr_iova' ], ] config = configuration_data() foreach arg:has_sym_args diff --git a/drivers/common/mlx5/linux/mlx5_glue.c b/drivers/common/mlx5/linux/mlx5_glue.c index 037ca961a0..bc6622053f 100644 --- a/drivers/common/mlx5/linux/mlx5_glue.c +++ b/drivers/common/mlx5/linux/mlx5_glue.c @@ -224,6 +224,23 @@ mlx5_glue_reg_mr(struct ibv_pd *pd, void *addr, size_t length, int access) return ibv_reg_mr(pd, addr, length, access); } +static struct ibv_mr * +mlx5_glue_reg_mr_iova(struct ibv_pd *pd, void *addr, size_t length, + uint64_t iova, int access) +{ +#ifdef HAVE_MLX5_IBV_REG_MR_IOVA + return ibv_reg_mr_iova(pd, addr, length, iova, access); +#else + (void)pd; + (void)addr; + (void)length; + (void)iova; + (void)access; + errno = ENOTSUP; + return NULL; +#endif +} + static struct ibv_mr * mlx5_glue_alloc_null_mr(struct ibv_pd *pd) { @@ -1412,6 +1429,7 @@ const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue) { .destroy_qp = mlx5_glue_destroy_qp, .modify_qp = mlx5_glue_modify_qp, .reg_mr = mlx5_glue_reg_mr, + .reg_mr_iova = mlx5_glue_reg_mr_iova, .alloc_null_mr = mlx5_glue_alloc_null_mr, .dereg_mr = mlx5_glue_dereg_mr, .create_counter_set = mlx5_glue_create_counter_set, diff --git a/drivers/common/mlx5/linux/mlx5_glue.h b/drivers/common/mlx5/linux/mlx5_glue.h index f39ef2dac7..4e6d31f263 100644 --- a/drivers/common/mlx5/linux/mlx5_glue.h +++ b/drivers/common/mlx5/linux/mlx5_glue.h @@ -197,6 +197,9 @@ struct mlx5_glue { int attr_mask); struct ibv_mr *(*reg_mr)(struct ibv_pd *pd, void *addr, size_t length, int access); + struct ibv_mr *(*reg_mr_iova)(struct ibv_pd *pd, void *addr, + size_t length, uint64_t iova, + int access); struct ibv_mr *(*alloc_null_mr)(struct ibv_pd *pd); int (*dereg_mr)(struct ibv_mr *mr); struct ibv_counter_set *(*create_counter_set) -- 2.39.5