1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
3 * Copyright 2018-2021 Amazon.com, Inc. or its affiliates. All rights reserved.
9 #include <linux/delay.h>
10 #include <linux/device.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/semaphore.h>
13 #include <linux/sched.h>
15 #include <rdma/ib_verbs.h>
17 #include "efa_common_defs.h"
18 #include "efa_admin_defs.h"
19 #include "efa_admin_cmds_defs.h"
20 #include "efa_regs_defs.h"
22 #define EFA_MAX_HANDLERS 256
24 struct efa_com_admin_cq {
25 struct efa_admin_acq_entry *entries;
27 spinlock_t lock; /* Protects ACQ */
29 u16 cc; /* consumer counter */
33 struct efa_com_admin_sq {
34 struct efa_admin_aq_entry *entries;
36 spinlock_t lock; /* Protects ASQ */
40 u16 cc; /* consumer counter */
41 u16 pc; /* producer counter */
46 /* Don't use anything other than atomic64 */
47 struct efa_com_stats_admin {
48 atomic64_t submitted_cmd;
49 atomic64_t completed_cmd;
51 atomic64_t no_completion;
55 EFA_AQ_STATE_RUNNING_BIT = 0,
56 EFA_AQ_STATE_POLLING_BIT = 1,
59 struct efa_com_admin_queue {
62 struct efa_comp_ctx *comp_ctx;
63 u32 completion_timeout; /* usecs */
64 u16 poll_interval; /* msecs */
66 struct efa_com_admin_cq cq;
67 struct efa_com_admin_sq sq;
72 /* Count the number of available admin commands */
73 struct semaphore avail_cmds;
75 struct efa_com_stats_admin stats;
77 spinlock_t comp_ctx_lock; /* Protects completion context pool */
79 u16 comp_ctx_pool_next;
82 struct efa_aenq_handlers;
84 typedef void (*efa_eqe_handler)(struct efa_com_eq *eeq,
85 struct efa_admin_eqe *eqe);
88 struct efa_admin_aenq_entry *entries;
89 struct efa_aenq_handlers *aenq_handlers;
91 u32 cc; /* consumer counter */
97 struct efa_com_mmio_read {
98 struct efa_admin_mmio_req_read_less_resp *read_resp;
99 dma_addr_t read_resp_dma_addr;
101 u16 mmio_read_timeout; /* usecs */
102 /* serializes mmio reads */
107 struct efa_com_admin_queue aq;
108 struct efa_com_aenq aenq;
112 u32 supported_features;
115 struct efa_com_mmio_read mmio_read;
119 struct efa_com_dev *edev;
120 struct efa_admin_eqe *eqes;
122 u32 cc; /* Consumer counter */
129 struct efa_com_create_eq_params {
133 u8 entry_size_in_bytes;
137 struct efa_com_create_eq_result {
141 struct efa_com_destroy_eq_params {
145 typedef void (*efa_aenq_handler)(void *data,
146 struct efa_admin_aenq_entry *aenq_e);
148 /* Holds aenq handlers. Indexed by AENQ event group */
149 struct efa_aenq_handlers {
150 efa_aenq_handler handlers[EFA_MAX_HANDLERS];
151 efa_aenq_handler unimplemented_handler;
154 void efa_com_set_dma_addr(dma_addr_t addr, u32 *addr_high, u32 *addr_low);
155 int efa_com_admin_init(struct efa_com_dev *edev,
156 struct efa_aenq_handlers *aenq_handlers);
157 void efa_com_admin_destroy(struct efa_com_dev *edev);
158 int efa_com_eq_init(struct efa_com_dev *edev, struct efa_com_eq *eeq,
159 efa_eqe_handler cb, u16 depth, u8 msix_vec);
160 void efa_com_eq_destroy(struct efa_com_dev *edev, struct efa_com_eq *eeq);
161 int efa_com_dev_reset(struct efa_com_dev *edev,
162 enum efa_regs_reset_reason_types reset_reason);
163 void efa_com_set_admin_polling_mode(struct efa_com_dev *edev, bool polling);
164 void efa_com_admin_q_comp_intr_handler(struct efa_com_dev *edev);
165 int efa_com_mmio_reg_read_init(struct efa_com_dev *edev);
166 void efa_com_mmio_reg_read_destroy(struct efa_com_dev *edev);
168 int efa_com_validate_version(struct efa_com_dev *edev);
169 int efa_com_get_dma_width(struct efa_com_dev *edev);
171 int efa_com_cmd_exec(struct efa_com_admin_queue *aq,
172 struct efa_admin_aq_entry *cmd,
174 struct efa_admin_acq_entry *comp,
176 void efa_com_aenq_intr_handler(struct efa_com_dev *edev, void *data);
177 void efa_com_eq_comp_intr_handler(struct efa_com_dev *edev,
178 struct efa_com_eq *eeq);
180 #endif /* _EFA_COM_H_ */