> -----Original Message-----
> From: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
> Sent: Monday, 17 January 2022 09:48
> To: jgg@xxxxxxxx; dledford@xxxxxxxxxx
> Cc: leon@xxxxxxxxxx; linux-rdma@xxxxxxxxxxxxxxx;
> KaiShen@xxxxxxxxxxxxxxxxx; chengyou@xxxxxxxxxxxxxxxxx;
> tonylu@xxxxxxxxxxxxxxxxx
> Subject: [EXTERNAL] [PATCH rdma-next v2 06/11] RDMA/erdma: Add verbs
> header file
>
> This header file defines the main structrues and functions used for RDMA
> Verbs, including qp, cq, mr ucontext, etc,.
>
> Signed-off-by: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
> ---
> drivers/infiniband/hw/erdma/erdma_verbs.h | 339 ++++++++++++++++++++++
> 1 file changed, 339 insertions(+)
> create mode 100644 drivers/infiniband/hw/erdma/erdma_verbs.h
>
> diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h
> b/drivers/infiniband/hw/erdma/erdma_verbs.h
> new file mode 100644
> index 000000000000..cfaee0143369
> --- /dev/null
> +++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
> @@ -0,0 +1,339 @@
> +/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
> +
> +/* Authors: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx> */
> +/* Kai Shen <kaishen@xxxxxxxxxxxxxxxxx> */
> +/* Copyright (c) 2020-2022, Alibaba Group. */
> +
> +#ifndef __ERDMA_VERBS_H__
> +#define __ERDMA_VERBS_H__
> +
> +#include <linux/errno.h>
> +
> +#include <rdma/iw_cm.h>
> +#include <rdma/ib_verbs.h>
> +#include <rdma/ib_user_verbs.h>
> +
> +#include "erdma.h"
> +#include "erdma_cm.h"
> +#include "erdma_hw.h"
> +
> +/* RDMA Capbility. */
> +#define ERDMA_MAX_PD (128 * 1024)
> +#define ERDMA_MAX_SEND_WR 4096
> +#define ERDMA_MAX_ORD 128
> +#define ERDMA_MAX_IRD 128
> +#define ERDMA_MAX_SGE_RD 1
> +#define ERDMA_MAX_FMR 0
> +#define ERDMA_MAX_SRQ 0 /* not support srq now. */
> +#define ERDMA_MAX_SRQ_WR 0 /* not support srq now. */
> +#define ERDMA_MAX_SRQ_SGE 0 /* not support srq now. */
> +#define ERDMA_MAX_CONTEXT (128 * 1024)
> +#define ERDMA_MAX_SEND_SGE 6
> +#define ERDMA_MAX_RECV_SGE 1
> +#define ERDMA_MAX_INLINE (sizeof(struct erdma_sge) *
> (ERDMA_MAX_SEND_SGE))
> +#define ERDMA_MAX_FRMR_PA 512
> +
> +enum {
> + ERDMA_MMAP_IO_NC = 0, /* no cache */
> +};
> +
> +struct erdma_user_mmap_entry {
> + struct rdma_user_mmap_entry rdma_entry;
> + u64 address;
> + u8 mmap_flag;
> +};
> +
> +struct erdma_ucontext {
> + struct ib_ucontext ibucontext;
> + struct erdma_dev *dev;
> +
> + u32 sdb_type;
> + u32 sdb_idx;
> + u32 sdb_page_idx;
> + u32 sdb_page_off;
> + u64 sdb;
> + u64 rdb;
> + u64 cdb;
> +
> + struct rdma_user_mmap_entry *sq_db_mmap_entry;
> + struct rdma_user_mmap_entry *rq_db_mmap_entry;
> + struct rdma_user_mmap_entry *cq_db_mmap_entry;
> +
> + /* doorbell records */
> + struct list_head dbrecords_page_list;
> + struct mutex dbrecords_page_mutex;
> +};
> +
> +struct erdma_pd {
> + struct ib_pd ibpd;
> + u32 pdn;
> +};
> +
> +/*
> + * MemoryRegion definition.
> + */
> +#define ERDMA_MAX_INLINE_MTT_ENTRIES 4
> +#define MTT_SIZE(x) (x << 3) /* per mtt takes 8 Bytes. */
> +#define ERDMA_MR_MAX_MTT_CNT 524288
> +#define ERDMA_MTT_ENTRY_SIZE 8
> +
> +#define ERDMA_MR_TYPE_NORMAL 0
> +#define ERDMA_MR_TYPE_FRMR 1
> +#define ERDMA_MR_TYPE_DMA 2
> +
> +#define ERDMA_MR_INLINE_MTT 0
> +#define ERDMA_MR_INDIRECT_MTT 1
> +
> +#define ERDMA_MR_ACC_LR BIT(0)
> +#define ERDMA_MR_ACC_LW BIT(1)
> +#define ERDMA_MR_ACC_RR BIT(2)
> +#define ERDMA_MR_ACC_RW BIT(3)
> +
> +struct erdma_mem {
> + struct ib_umem *umem;
> + void *mtt_buf;
> + u32 mtt_type;
> + u32 page_size;
> + u32 page_offset;
> + u32 page_cnt;
> + u32 mtt_nents;
> +
> + u64 va;
> + u64 len;
> +
> + u64 mtt_entry[ERDMA_MAX_INLINE_MTT_ENTRIES];
> +};
> +
> +struct erdma_mr {
> + struct ib_mr ibmr;
> + struct erdma_mem mem;
> + u8 type;
> + u8 access;
> + u8 valid;
> +};
> +
> +struct erdma_user_dbrecords_page {
> + struct list_head list;
> + struct ib_umem *umem;
> + u64 va;
> + int refcnt;
> +};
> +
> +struct erdma_uqp {
> + struct erdma_mem sq_mtt;
> + struct erdma_mem rq_mtt;
> +
> + dma_addr_t sq_db_info_dma_addr;
> + dma_addr_t rq_db_info_dma_addr;
> +
> + struct erdma_user_dbrecords_page *user_dbr_page;
> +
> + u32 rq_offset;
> +};
> +struct erdma_kqp {
> + u16 sq_pi;
> + u16 sq_ci;
> +
> + u16 rq_pi;
> + u16 rq_ci;
> +
> + u64 *swr_tbl;
> + u64 *rwr_tbl;
> +
> + void *hw_sq_db;
> + void *hw_rq_db;
> +
> + void *sq_buf;
> + dma_addr_t sq_buf_dma_addr;
> +
> + void *rq_buf;
> + dma_addr_t rq_buf_dma_addr;
> +
> + void *sq_db_info;
> + void *rq_db_info;
> +
> + u8 sig_all;
> +};
> +
> +enum erdma_qp_state {
> + ERDMA_QP_STATE_IDLE = 0,
> + ERDMA_QP_STATE_RTR = 1,
> + ERDMA_QP_STATE_RTS = 2,
> + ERDMA_QP_STATE_CLOSING = 3,
> + ERDMA_QP_STATE_TERMINATE = 4,
> + ERDMA_QP_STATE_ERROR = 5,
> + ERDMA_QP_STATE_UNDEF = 7,
> + ERDMA_QP_STATE_COUNT = 8
> +};
> +
> +enum erdma_qp_attr_mask {
> + ERDMA_QP_ATTR_STATE = (1 << 0),
> + ERDMA_QP_ATTR_LLP_HANDLE = (1 << 2),
> + ERDMA_QP_ATTR_ORD = (1 << 3),
> + ERDMA_QP_ATTR_IRD = (1 << 4),
> + ERDMA_QP_ATTR_SQ_SIZE = (1 << 5),
> + ERDMA_QP_ATTR_RQ_SIZE = (1 << 6),
> + ERDMA_QP_ATTR_MPA = (1 << 7)
> +};
> +
> +struct erdma_qp_attrs {
> + enum erdma_qp_state state;
> + u32 sq_size;
> + u32 rq_size;
> + u32 orq_size;
> + u32 irq_size;
> + u32 max_send_sge;
> + u32 max_recv_sge;
> +};
> +
> +struct erdma_qp {
> + struct ib_qp ibqp;
> + struct kref ref;
> + struct completion safe_free;
> + struct erdma_dev *dev;
> + struct erdma_cep *cep;
> + struct rw_semaphore state_lock;
> + bool is_kernel_qp;
this information is available via RDMA core.
one can always query 'rdma_is_kernel_res(&qp->ibqp.res)'
you should really look at the latest siw code 😉
> +
> + union {
> + struct erdma_kqp kern_qp;
> + struct erdma_uqp user_qp;
> + };
> +
> + struct erdma_cq *scq;
> + struct erdma_cq *rcq;
> +
> + struct erdma_qp_attrs attrs;
> + spinlock_t lock;
> +
> + u8 cc_method;
> +#define ERDMA_QP_ACTIVE 0
> +#define ERDMA_QP_PASSIVE 1
> + u8 qp_type;
> + u8 private_data_len;
> +};
> +
> +struct erdma_kcq_info {
> + struct erdma_cqe *qbuf;
> + dma_addr_t qbuf_dma_addr;
> + u32 ci;
> + u32 owner;
> + u32 cmdsn;
> + void *db;
> + spinlock_t lock;
> + void *db_info;
> +};
> +
> +struct erdma_ucq_info {
> + struct erdma_mem qbuf_mtt;
> + struct erdma_user_dbrecords_page *user_dbr_page;
> + dma_addr_t db_info_dma_addr;
> +};
> +
> +struct erdma_cq {
> + struct ib_cq ibcq;
> + u32 cqn;
> +
> + u32 depth;
> + u32 assoc_eqn;
> + u32 is_kernel_cq;
bogus u32 here, and can be completely removed.
use rdma_is_kernel_res(&cq->ibcq.res)
> +
> + union {
> + struct erdma_kcq_info kern_cq;
> + struct erdma_ucq_info user_cq;
> + };
> +};
> +
> +#define QP_ID(qp) ((qp)->ibqp.qp_num)
> +
> +static inline struct erdma_qp *find_qp_by_qpn(struct erdma_dev *dev, int
> id)
> +{
> + return (struct erdma_qp *)xa_load(&dev->qp_xa, id);
> +}
> +
> +static inline struct erdma_cq *find_cq_by_cqn(struct erdma_dev *dev, int
> id)
> +{
> + return (struct erdma_cq *)xa_load(&dev->cq_xa, id);
> +}
> +
> +void erdma_qp_get(struct erdma_qp *qp);
> +void erdma_qp_put(struct erdma_qp *qp);
> +int erdma_modify_qp_internal(struct erdma_qp *qp, struct erdma_qp_attrs
> *attrs,
> + enum erdma_qp_attr_mask mask);
> +void erdma_qp_llp_close(struct erdma_qp *qp);
> +void erdma_qp_cm_drop(struct erdma_qp *qp);
> +
> +static inline struct erdma_ucontext *to_ectx(struct ib_ucontext *ibctx)
> +{
> + return container_of(ibctx, struct erdma_ucontext, ibucontext);
> +}
> +
> +static inline struct erdma_pd *to_epd(struct ib_pd *pd)
> +{
> + return container_of(pd, struct erdma_pd, ibpd);
> +}
> +
> +static inline struct erdma_mr *to_emr(struct ib_mr *ibmr)
> +{
> + return container_of(ibmr, struct erdma_mr, ibmr);
> +}
> +
> +static inline struct erdma_qp *to_eqp(struct ib_qp *qp)
> +{
> + return container_of(qp, struct erdma_qp, ibqp);
> +}
> +
> +static inline struct erdma_cq *to_ecq(struct ib_cq *ibcq)
> +{
> + return container_of(ibcq, struct erdma_cq, ibcq);
> +}
> +
> +static inline struct erdma_user_mmap_entry *to_emmap(struct
> rdma_user_mmap_entry *ibmmap)
> +{
> + return container_of(ibmmap, struct erdma_user_mmap_entry,
> rdma_entry);
> +}
> +
> +static inline void *get_sq_entry(struct erdma_qp *qp, u16 idx)
> +{
> + idx &= (qp->attrs.sq_size - 1);
> + return qp->kern_qp.sq_buf + (idx << SQEBB_SHIFT);
> +}
> +
> +int erdma_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *data);
> +void erdma_dealloc_ucontext(struct ib_ucontext *ctx);
> +int erdma_query_device(struct ib_device *dev, struct ib_device_attr
> *attr, struct ib_udata *data);
> +int erdma_get_port_immutable(struct ib_device *dev, u32 port,
> + struct ib_port_immutable *ib_port_immutable);
> +int erdma_create_cq(struct ib_cq *cq, const struct ib_cq_init_attr *attr,
> struct ib_udata *data);
> +int erdma_query_port(struct ib_device *dev, u32 port, struct ib_port_attr
> *attr);
> +int erdma_query_gid(struct ib_device *dev, u32 port, int idx, union
> ib_gid *gid);
> +int erdma_alloc_pd(struct ib_pd *pd, struct ib_udata *data);
> +int erdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata);
> +int erdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attr,
> struct ib_udata *data);
> +int erdma_query_qp(struct ib_qp *qp, struct ib_qp_attr *attr, int mask,
> + struct ib_qp_init_attr *init_attr);
> +int erdma_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, int mask,
> struct ib_udata *data);
> +int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata);
> +int erdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
> +int erdma_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
> +struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
> u64 virt, int access,
> + struct ib_udata *udata);
> +struct ib_mr *erdma_get_dma_mr(struct ib_pd *ibpd, int rights);
> +int erdma_dereg_mr(struct ib_mr *mr, struct ib_udata *data);
> +int erdma_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma);
> +void erdma_qp_get_ref(struct ib_qp *qp);
> +void erdma_qp_put_ref(struct ib_qp *qp);
> +struct ib_qp *erdma_get_ibqp(struct ib_device *dev, int id);
> +int erdma_post_send(struct ib_qp *qp, const struct ib_send_wr *send_wr,
> + const struct ib_send_wr **bad_send_wr);
> +int erdma_post_recv(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
> + const struct ib_recv_wr **bad_recv_wr);
> +int erdma_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
> +struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type
> mr_type, u32 max_num_sg);
> +int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int
> sg_nents,
> + unsigned int *sg_offset);
> +struct net_device *erdma_get_netdev(struct ib_device *device, u32
> port_num);
> +void erdma_disassociate_ucontext(struct ib_ucontext *ibcontext);
> +void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason);
> +
> +#endif
> --
> 2.27.0
