[PATCH rdma-next 06/11] RDMA/erdma: Add verbs header file

[Cheng Xu <chengyou@linux.alibaba.com>]

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@linux.alibaba.com>
---
 drivers/infiniband/hw/erdma/erdma_verbs.h | 366 ++++++++++++++++++++++
 1 file changed, 366 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..6eda8843d0d5
--- /dev/null
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
@@ -0,0 +1,366 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Authors: Cheng Xu <chengyou@linux.alibaba.com>
+ *          Kai Shen <kaishen@linux.alibaba.com>
+ * Copyright (c) 2020-2021, 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_flags {
+	ERDMA_BIND_ENABLED	= (1 << 0),
+	ERDMA_WRITE_ENABLED	= (1 << 1),
+	ERDMA_READ_ENABLED	= (1 << 2)
+};
+
+enum erdma_qp_attr_mask {
+	ERDMA_QP_ATTR_STATE             = (1 << 0),
+	ERDMA_QP_ATTR_ACCESS_FLAGS      = (1 << 1),
+	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;
+	enum erdma_qp_flags flags;
+
+	struct socket *llp_stream_handle;
+	u32 sip;
+	u32 dip;
+	u16 sport;
+	u16 dport;
+	u16 origin_sport;
+	u32 remote_qpn;
+};
+
+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;
+
+	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_TYPE_CLIENT 0
+#define ERDMA_QP_TYPE_SERVER 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;
+
+	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);
+}
+
+extern void erdma_qp_get(struct erdma_qp *qp);
+extern void erdma_qp_put(struct erdma_qp *qp);
+extern int erdma_modify_qp_internal(struct erdma_qp *qp, struct erdma_qp_attrs *attrs,
+				    enum erdma_qp_attr_mask mask);
+extern void erdma_qp_llp_close(struct erdma_qp *qp);
+extern void erdma_qp_cm_drop(struct erdma_qp *qp, int sched);
+
+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);
+}
+
+extern int erdma_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *data);
+extern void erdma_dealloc_ucontext(struct ib_ucontext *ctx);
+extern int erdma_query_device(struct ib_device *dev, struct ib_device_attr *attr,
+			      struct ib_udata *data);
+extern int erdma_get_port_immutable(struct ib_device *dev, u32 port,
+				    struct ib_port_immutable *ib_port_immutable);
+extern int erdma_create_cq(struct ib_cq *cq,
+			   const struct ib_cq_init_attr *attr,
+			   struct ib_udata *data);
+extern int erdma_query_port(struct ib_device *dev, u32 port, struct ib_port_attr *attr);
+extern int erdma_query_pkey(struct ib_device *dev, u32 port, u16 idx, u16 *pkey);
+extern int erdma_query_gid(struct ib_device *dev, u32 port, int idx, union ib_gid *gid);
+extern int erdma_alloc_pd(struct ib_pd *pd, struct ib_udata *data);
+extern int erdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata);
+extern int erdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attr,
+				   struct ib_udata *data);
+extern int erdma_query_qp(struct ib_qp *qp, struct ib_qp_attr *attr, int mask,
+			struct ib_qp_init_attr *init_attr);
+extern int erdma_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, int mask,
+			      struct ib_udata *data);
+extern int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata);
+extern int erdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
+extern int erdma_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
+extern struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
+				      u64 virt, int access, struct ib_udata *udata);
+extern struct ib_mr *erdma_get_dma_mr(struct ib_pd *ibpd, int rights);
+extern int erdma_dereg_mr(struct ib_mr *mr, struct ib_udata *data);
+extern int erdma_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma);
+extern void erdma_qp_get_ref(struct ib_qp *qp);
+extern void erdma_qp_put_ref(struct ib_qp *qp);
+extern struct ib_qp *erdma_get_ibqp(struct ib_device *dev, int id);
+extern int erdma_post_send(struct ib_qp *qp, const struct ib_send_wr *send_wr,
+			   const struct ib_send_wr **bad_send_wr);
+extern int erdma_post_recv(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
+			   const struct ib_recv_wr **bad_recv_wr);
+extern int erdma_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
+extern struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
+				       u32 max_num_sg);
+extern int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
+			   int sg_nents, unsigned int *sg_offset);
+extern struct net_device *erdma_get_netdev(struct ib_device *device, u32 port_num);
+extern void erdma_disassociate_ucontext(struct ib_ucontext *ibcontext);
+extern void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason);
+
+#endif
-- 
2.27.0