79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2022 Hisilicon Limited. All rights reserved.
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*/
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#ifndef __HNS_ROCE_DCA_H
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#define __HNS_ROCE_DCA_H
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#include <rdma/uverbs_ioctl.h>
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/* DCA page state (32 bit) */
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struct hns_dca_page_state {
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u32 buf_id : 29; /* If zero, means page can be used by any buffer. */
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u32 lock : 1; /* @buf_id locked this page to prepare access. */
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u32 active : 1; /* @buf_id is accessing this page. */
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u32 head : 1; /* This page is the head in a continuous address range. */
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};
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extern const struct uapi_definition hns_roce_dca_uapi_defs[];
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#define HNS_DCA_INVALID_BUF_ID 0UL
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#define HNS_DCA_INVALID_DCA_NUM ~0U
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/*
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* buffer id(29b) = tag(7b) + owner(22b)
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* [28:22] tag : indicate the QP config update times.
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* [21: 0] owner: indicate the QP to which the page belongs.
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*/
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#define HNS_DCA_ID_MASK GENMASK(28, 0)
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#define HNS_DCA_TAG_MASK GENMASK(28, 22)
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#define HNS_DCA_OWN_MASK GENMASK(21, 0)
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#define HNS_DCA_BUF_ID_TO_TAG(buf_id) (((buf_id) & HNS_DCA_TAG_MASK) >> 22)
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#define HNS_DCA_BUF_ID_TO_QPN(buf_id) ((buf_id) & HNS_DCA_OWN_MASK)
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#define HNS_DCA_TO_BUF_ID(qpn, tag) (((qpn) & HNS_DCA_OWN_MASK) | \
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(((tag) << 22) & HNS_DCA_TAG_MASK))
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struct hns_dca_attach_attr {
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u32 sq_offset;
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u32 sge_offset;
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u32 rq_offset;
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};
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struct hns_dca_attach_resp {
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#define HNS_DCA_ATTACH_FLAGS_NEW_BUFFER BIT(0)
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u32 alloc_flags;
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u32 alloc_pages;
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};
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struct hns_dca_detach_attr {
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u32 sq_idx;
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};
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typedef int (*hns_dca_enum_callback)(struct hns_dca_page_state *, u32, void *);
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void hns_roce_init_dca(struct hns_roce_dev *hr_dev);
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void hns_roce_cleanup_dca(struct hns_roce_dev *hr_dev);
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void hns_roce_register_udca(struct hns_roce_dev *hr_dev, int max_qps,
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struct hns_roce_ucontext *uctx);
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void hns_roce_unregister_udca(struct hns_roce_dev *hr_dev,
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struct hns_roce_ucontext *uctx);
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int hns_roce_enable_dca(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
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struct ib_udata *udata);
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void hns_roce_disable_dca(struct hns_roce_dev *hr_dev,
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struct hns_roce_qp *hr_qp, struct ib_udata *udata);
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int hns_roce_dca_attach(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
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struct hns_dca_attach_attr *attr);
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void hns_roce_dca_detach(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
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struct hns_dca_detach_attr *attr);
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void hns_roce_modify_dca(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
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struct ib_udata *udata);
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void hns_roce_enum_dca_pool(struct hns_roce_dca_ctx *dca_ctx, void *param,
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hns_dca_enum_callback cb);
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#endif
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