1/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
2/*
3 * Copyright 2018-2024 Amazon.com, Inc. or its affiliates. All rights reserved.
4 */
5
6#ifndef _EFA_H_
7#define _EFA_H_
8
9#include <linux/bitops.h>
10#include <linux/interrupt.h>
11#include <linux/pci.h>
12
13#include <rdma/efa-abi.h>
14#include <rdma/ib_verbs.h>
15
16#include "efa_com_cmd.h"
17
18#define DRV_MODULE_NAME         "efa"
19#define DEVICE_NAME             "Elastic Fabric Adapter (EFA)"
20
21#define EFA_IRQNAME_SIZE        40
22
23#define EFA_MGMNT_MSIX_VEC_IDX            0
24#define EFA_COMP_EQS_VEC_BASE             1
25
26struct efa_irq {
27	irq_handler_t handler;
28	void *data;
29	u32 irqn;
30	u32 vector;
31	cpumask_t affinity_hint_mask;
32	char name[EFA_IRQNAME_SIZE];
33};
34
35/* Don't use anything other than atomic64 */
36struct efa_stats {
37	atomic64_t alloc_pd_err;
38	atomic64_t create_qp_err;
39	atomic64_t create_cq_err;
40	atomic64_t reg_mr_err;
41	atomic64_t alloc_ucontext_err;
42	atomic64_t create_ah_err;
43	atomic64_t mmap_err;
44	atomic64_t keep_alive_rcvd;
45};
46
47struct efa_dev {
48	struct ib_device ibdev;
49	struct efa_com_dev edev;
50	struct pci_dev *pdev;
51	struct efa_com_get_device_attr_result dev_attr;
52
53	u64 reg_bar_addr;
54	u64 reg_bar_len;
55	u64 mem_bar_addr;
56	u64 mem_bar_len;
57	u64 db_bar_addr;
58	u64 db_bar_len;
59
60	unsigned int num_irq_vectors;
61	int admin_msix_vector_idx;
62	struct efa_irq admin_irq;
63
64	struct efa_stats stats;
65
66	/* Array of completion EQs */
67	struct efa_eq *eqs;
68	unsigned int neqs;
69
70	/* Only stores CQs with interrupts enabled */
71	struct xarray cqs_xa;
72};
73
74struct efa_ucontext {
75	struct ib_ucontext ibucontext;
76	u16 uarn;
77};
78
79struct efa_pd {
80	struct ib_pd ibpd;
81	u16 pdn;
82};
83
84struct efa_mr_interconnect_info {
85	u16 recv_ic_id;
86	u16 rdma_read_ic_id;
87	u16 rdma_recv_ic_id;
88	u8 recv_ic_id_valid : 1;
89	u8 rdma_read_ic_id_valid : 1;
90	u8 rdma_recv_ic_id_valid : 1;
91};
92
93struct efa_mr {
94	struct ib_mr ibmr;
95	struct ib_umem *umem;
96	struct efa_mr_interconnect_info ic_info;
97};
98
99struct efa_cq {
100	struct ib_cq ibcq;
101	struct efa_ucontext *ucontext;
102	dma_addr_t dma_addr;
103	void *cpu_addr;
104	struct rdma_user_mmap_entry *mmap_entry;
105	struct rdma_user_mmap_entry *db_mmap_entry;
106	size_t size;
107	u16 cq_idx;
108	/* NULL when no interrupts requested */
109	struct efa_eq *eq;
110};
111
112struct efa_qp {
113	struct ib_qp ibqp;
114	dma_addr_t rq_dma_addr;
115	void *rq_cpu_addr;
116	size_t rq_size;
117	enum ib_qp_state state;
118
119	/* Used for saving mmap_xa entries */
120	struct rdma_user_mmap_entry *sq_db_mmap_entry;
121	struct rdma_user_mmap_entry *llq_desc_mmap_entry;
122	struct rdma_user_mmap_entry *rq_db_mmap_entry;
123	struct rdma_user_mmap_entry *rq_mmap_entry;
124
125	u32 qp_handle;
126	u32 max_send_wr;
127	u32 max_recv_wr;
128	u32 max_send_sge;
129	u32 max_recv_sge;
130	u32 max_inline_data;
131};
132
133struct efa_ah {
134	struct ib_ah ibah;
135	u16 ah;
136	/* dest_addr */
137	u8 id[EFA_GID_SIZE];
138};
139
140struct efa_eq {
141	struct efa_com_eq eeq;
142	struct efa_irq irq;
143};
144
145int efa_query_device(struct ib_device *ibdev,
146		     struct ib_device_attr *props,
147		     struct ib_udata *udata);
148int efa_query_port(struct ib_device *ibdev, u32 port,
149		   struct ib_port_attr *props);
150int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
151		 int qp_attr_mask,
152		 struct ib_qp_init_attr *qp_init_attr);
153int efa_query_gid(struct ib_device *ibdev, u32 port, int index,
154		  union ib_gid *gid);
155int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
156		   u16 *pkey);
157int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata);
158int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata);
159int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata);
160int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
161		  struct ib_udata *udata);
162int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
163int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
164		  struct ib_udata *udata);
165struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
166			 u64 virt_addr, int access_flags,
167			 struct ib_udata *udata);
168struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start,
169				     u64 length, u64 virt_addr,
170				     int fd, int access_flags,
171				     struct ib_udata *udata);
172int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata);
173int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num,
174			   struct ib_port_immutable *immutable);
175int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata);
176void efa_dealloc_ucontext(struct ib_ucontext *ibucontext);
177int efa_mmap(struct ib_ucontext *ibucontext,
178	     struct vm_area_struct *vma);
179void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry);
180int efa_create_ah(struct ib_ah *ibah,
181		  struct rdma_ah_init_attr *init_attr,
182		  struct ib_udata *udata);
183int efa_destroy_ah(struct ib_ah *ibah, u32 flags);
184int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
185		  int qp_attr_mask, struct ib_udata *udata);
186enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
187					 u32 port_num);
188struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev, u32 port_num);
189struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev);
190int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
191		     u32 port_num, int index);
192
193#endif /* _EFA_H_ */
194