1 /* SPDX-License-Identifier: BSD-3-Clause
2 *
3 * Copyright(c) 2019-2020 Xilinx, Inc.
4 * Copyright(c) 2016-2019 Solarflare Communications Inc.
5 *
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
8 */
9
10 #ifndef _SFC_EV_H_
11 #define _SFC_EV_H_
12
13 #include <rte_ethdev_driver.h>
14
15 #include "efx.h"
16
17 #include "sfc.h"
18
19 #ifdef __cplusplus
20 extern "C" {
21 #endif
22
23 struct sfc_adapter;
24 struct sfc_dp_rxq;
25 struct sfc_dp_txq;
26
27 enum sfc_evq_state {
28 SFC_EVQ_UNINITIALIZED = 0,
29 SFC_EVQ_INITIALIZED,
30 SFC_EVQ_STARTING,
31 SFC_EVQ_STARTED,
32
33 SFC_EVQ_NSTATES
34 };
35
36 enum sfc_evq_type {
37 SFC_EVQ_TYPE_MGMT = 0,
38 SFC_EVQ_TYPE_RX,
39 SFC_EVQ_TYPE_TX,
40
41 SFC_EVQ_NTYPES
42 };
43
44 struct sfc_evq {
45 /* Used on datapath */
46 efx_evq_t *common;
47 const efx_ev_callbacks_t *callbacks;
48 unsigned int read_ptr;
49 unsigned int read_ptr_primed;
50 boolean_t exception;
51 efsys_mem_t mem;
52 struct sfc_dp_rxq *dp_rxq;
53 struct sfc_dp_txq *dp_txq;
54
55 /* Not used on datapath */
56 struct sfc_adapter *sa;
57 unsigned int evq_index;
58 enum sfc_evq_state init_state;
59 enum sfc_evq_type type;
60 unsigned int entries;
61 };
62
63 /*
64 * Functions below define event queue to transmit/receive queue and vice
65 * versa mapping.
66 * Own event queue is allocated for management, each Rx and each Tx queue.
67 * Zero event queue is used for management events.
68 * Rx event queues from 1 to RxQ number follow management event queue.
69 * Tx event queues follow Rx event queues.
70 */
71
72 static inline unsigned int
sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter * sa,unsigned int rxq_sw_index)73 sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa,
74 unsigned int rxq_sw_index)
75 {
76 return 1 + rxq_sw_index;
77 }
78
79 static inline unsigned int
sfc_evq_index_by_txq_sw_index(struct sfc_adapter * sa,unsigned int txq_sw_index)80 sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index)
81 {
82 return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index;
83 }
84
85 int sfc_ev_attach(struct sfc_adapter *sa);
86 void sfc_ev_detach(struct sfc_adapter *sa);
87 int sfc_ev_start(struct sfc_adapter *sa);
88 void sfc_ev_stop(struct sfc_adapter *sa);
89
90 int sfc_ev_qinit(struct sfc_adapter *sa,
91 enum sfc_evq_type type, unsigned int type_index,
92 unsigned int entries, int socket_id, struct sfc_evq **evqp);
93 void sfc_ev_qfini(struct sfc_evq *evq);
94 int sfc_ev_qstart(struct sfc_evq *evq, unsigned int hw_index);
95 void sfc_ev_qstop(struct sfc_evq *evq);
96
97 int sfc_ev_qprime(struct sfc_evq *evq);
98 void sfc_ev_qpoll(struct sfc_evq *evq);
99
100 void sfc_ev_mgmt_qpoll(struct sfc_adapter *sa);
101
102 #ifdef __cplusplus
103 }
104 #endif
105 #endif /* _SFC_EV_H_ */
106