1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (c) 2015-2018 Atomic Rules LLC
3 */
4
5 #include <unistd.h>
6
7 #include "ark_logs.h"
8 #include "ark_ddm.h"
9
10 static_assert(sizeof(union ark_tx_meta) == 8, "Unexpected struct size ark_tx_meta");
11
12 /* ************************************************************************* */
13 int
ark_ddm_verify(struct ark_ddm_t * ddm)14 ark_ddm_verify(struct ark_ddm_t *ddm)
15 {
16 uint32_t hw_const;
17 if (sizeof(struct ark_ddm_t) != ARK_DDM_EXPECTED_SIZE) {
18 ARK_PMD_LOG(ERR, "DDM structure looks incorrect %d vs %zd\n",
19 ARK_DDM_EXPECTED_SIZE, sizeof(struct ark_ddm_t));
20 return -1;
21 }
22
23 hw_const = ddm->cfg.const0;
24 if (hw_const == ARK_DDM_CONST3)
25 return 0;
26
27 if (hw_const == ARK_DDM_CONST1) {
28 ARK_PMD_LOG(ERR,
29 "ARK: DDM module is version 1, "
30 "PMD expects version 2\n");
31 return -1;
32 }
33
34 if (hw_const == ARK_DDM_CONST2) {
35 ARK_PMD_LOG(ERR,
36 "ARK: DDM module is version 2, "
37 "PMD expects version 3\n");
38 return -1;
39 }
40 ARK_PMD_LOG(ERR,
41 "ARK: DDM module not found as expected 0x%08x\n",
42 ddm->cfg.const0);
43 return -1;
44 }
45
46 void
ark_ddm_start(struct ark_ddm_t * ddm)47 ark_ddm_start(struct ark_ddm_t *ddm)
48 {
49 ddm->cfg.command = 1;
50 }
51
52 int
ark_ddm_stop(struct ark_ddm_t * ddm,const int wait)53 ark_ddm_stop(struct ark_ddm_t *ddm, const int wait)
54 {
55 int cnt = 0;
56
57 ddm->cfg.command = 2;
58 rte_wmb();
59 while (wait && (ddm->cfg.stop_flushed & 0x01) == 0) {
60 if (cnt++ > 1000)
61 return 1;
62
63 usleep(10);
64 }
65 return 0;
66 }
67
68 void
ark_ddm_reset(struct ark_ddm_t * ddm)69 ark_ddm_reset(struct ark_ddm_t *ddm)
70 {
71 int status;
72
73 /* reset only works if ddm has stopped properly. */
74 status = ark_ddm_stop(ddm, 1);
75
76 if (status != 0) {
77 ARK_PMD_LOG(NOTICE, "%s stop failed doing forced reset\n",
78 __func__);
79 ddm->cfg.command = 4;
80 usleep(10);
81 }
82 ddm->cfg.command = 3;
83 }
84
85 void
ark_ddm_setup(struct ark_ddm_t * ddm,rte_iova_t cons_addr,uint32_t interval)86 ark_ddm_setup(struct ark_ddm_t *ddm, rte_iova_t cons_addr, uint32_t interval)
87 {
88 ddm->setup.cons_write_index_addr = cons_addr;
89 ddm->setup.write_index_interval = interval / 4; /* 4 ns period */
90 }
91
92 void
ark_ddm_stats_reset(struct ark_ddm_t * ddm)93 ark_ddm_stats_reset(struct ark_ddm_t *ddm)
94 {
95 ddm->cfg.tlp_stats_clear = 1;
96 }
97
98 void
ark_ddm_dump(struct ark_ddm_t * ddm,const char * msg)99 ark_ddm_dump(struct ark_ddm_t *ddm, const char *msg)
100 {
101 ARK_PMD_LOG(DEBUG, "%s Stopped: %d\n", msg,
102 ark_ddm_is_stopped(ddm)
103 );
104 }
105
106 void
ark_ddm_dump_stats(struct ark_ddm_t * ddm,const char * msg)107 ark_ddm_dump_stats(struct ark_ddm_t *ddm, const char *msg)
108 {
109 struct ark_ddm_stats_t *stats = &ddm->stats;
110
111 ARK_PMD_LOG(INFO, "DDM Stats: %s"
112 ARK_SU64 ARK_SU64 ARK_SU64
113 "\n", msg,
114 "Bytes:", stats->tx_byte_count,
115 "Packets:", stats->tx_pkt_count,
116 "MBufs", stats->tx_mbuf_count);
117 }
118
119 int
ark_ddm_is_stopped(struct ark_ddm_t * ddm)120 ark_ddm_is_stopped(struct ark_ddm_t *ddm)
121 {
122 return (ddm->cfg.stop_flushed & 0x01) != 0;
123 }
124
125 uint64_t
ark_ddm_queue_byte_count(struct ark_ddm_t * ddm)126 ark_ddm_queue_byte_count(struct ark_ddm_t *ddm)
127 {
128 return ddm->queue_stats.byte_count;
129 }
130
131 uint64_t
ark_ddm_queue_pkt_count(struct ark_ddm_t * ddm)132 ark_ddm_queue_pkt_count(struct ark_ddm_t *ddm)
133 {
134 return ddm->queue_stats.pkt_count;
135 }
136
137 void
ark_ddm_queue_reset_stats(struct ark_ddm_t * ddm)138 ark_ddm_queue_reset_stats(struct ark_ddm_t *ddm)
139 {
140 ddm->queue_stats.byte_count = 1;
141 }
142