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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. */
#ifndef _MLX5_IB_UMR_H
#define _MLX5_IB_UMR_H
#include "mlx5_ib.h"
#define MLX5_MAX_UMR_SHIFT 16
#define MLX5_MAX_UMR_PAGES (1 << MLX5_MAX_UMR_SHIFT)
#define MLX5_IB_UMR_OCTOWORD 16
#define MLX5_IB_UMR_XLT_ALIGNMENT 64
int mlx5r_umr_resource_init(struct mlx5_ib_dev *dev);
void mlx5r_umr_resource_cleanup(struct mlx5_ib_dev *dev);
static inline bool mlx5r_umr_can_load_pas(struct mlx5_ib_dev *dev,
size_t length)
{
/*
* umr_check_mkey_mask() rejects MLX5_MKEY_MASK_PAGE_SIZE which is
* always set if MLX5_IB_SEND_UMR_UPDATE_TRANSLATION (aka
* MLX5_IB_UPD_XLT_ADDR and MLX5_IB_UPD_XLT_ENABLE) is set. Thus, a mkey
* can never be enabled without this capability. Simplify this weird
* quirky hardware by just saying it can't use PAS lists with UMR at
* all.
*/
if (MLX5_CAP_GEN(dev->mdev, umr_modify_entity_size_disabled))
return false;
/*
* length is the size of the MR in bytes when mlx5_ib_update_xlt() is
* used.
*/
if (!MLX5_CAP_GEN(dev->mdev, umr_extended_translation_offset) &&
length >= MLX5_MAX_UMR_PAGES * PAGE_SIZE)
return false;
return true;
}
/*
* true if an existing MR can be reconfigured to new access_flags using UMR.
* Older HW cannot use UMR to update certain elements of the MKC. See
* get_umr_update_access_mask() and umr_check_mkey_mask()
*/
static inline bool mlx5r_umr_can_reconfig(struct mlx5_ib_dev *dev,
unsigned int current_access_flags,
unsigned int target_access_flags)
{
unsigned int diffs = current_access_flags ^ target_access_flags;
if ((diffs & IB_ACCESS_REMOTE_ATOMIC) &&
MLX5_CAP_GEN(dev->mdev, atomic) &&
MLX5_CAP_GEN(dev->mdev, umr_modify_atomic_disabled))
return false;
if ((diffs & IB_ACCESS_RELAXED_ORDERING) &&
MLX5_CAP_GEN(dev->mdev, relaxed_ordering_write) &&
!MLX5_CAP_GEN(dev->mdev, relaxed_ordering_write_umr))
return false;
if ((diffs & IB_ACCESS_RELAXED_ORDERING) &&
MLX5_CAP_GEN(dev->mdev, relaxed_ordering_read) &&
!MLX5_CAP_GEN(dev->mdev, relaxed_ordering_read_umr))
return false;
return true;
}
static inline u64 mlx5r_umr_get_xlt_octo(u64 bytes)
{
return ALIGN(bytes, MLX5_IB_UMR_XLT_ALIGNMENT) /
MLX5_IB_UMR_OCTOWORD;
}
struct mlx5r_umr_context {
struct ib_cqe cqe;
enum ib_wc_status status;
struct completion done;
};
struct mlx5r_umr_wqe {
struct mlx5_wqe_umr_ctrl_seg ctrl_seg;
struct mlx5_mkey_seg mkey_seg;
struct mlx5_wqe_data_seg data_seg;
};
int mlx5r_umr_revoke_mr(struct mlx5_ib_mr *mr);
int mlx5r_umr_rereg_pd_access(struct mlx5_ib_mr *mr, struct ib_pd *pd,
int access_flags);
int mlx5r_umr_update_mr_pas(struct mlx5_ib_mr *mr, unsigned int flags);
int mlx5r_umr_update_xlt(struct mlx5_ib_mr *mr, u64 idx, int npages,
int page_shift, int flags);
#endif /* _MLX5_IB_UMR_H */
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