1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (c) 2015-2018 Atomic Rules LLC
10 #include <rte_memory.h>
13 /* The DDM or Downstream Data Mover is an internal Arkville hardware
14 * module for moving packet from host memory to the TX packet streams.
15 * This module is *not* intended for end-user manipulation, hence
16 * there is minimal documentation.
19 /* struct defining Tx meta data -- fixed in FPGA -- 16 bytes */
23 uint16_t data_len; /* of this MBUF */
24 #define ARK_DDM_EOP 0x01
25 #define ARK_DDM_SOP 0x02
26 uint8_t flags; /* bit 0 indicates last mbuf in chain. */
32 * DDM core hardware structures
33 * These are overlay structures to a memory mapped FPGA device. These
34 * structs will never be instantiated in ram memory
36 #define ARK_DDM_CFG 0x0000
37 /* Set unique HW ID for hardware version */
38 #define ARK_DDM_CONST2 (0x324d4444)
39 #define ARK_DDM_CONST1 (0xfacecafe)
41 struct ark_ddm_cfg_t {
43 volatile uint32_t tlp_stats_clear;
45 volatile uint32_t tag_max;
46 volatile uint32_t command;
47 volatile uint32_t stop_flushed;
50 #define ARK_DDM_STATS 0x0020
51 struct ark_ddm_stats_t {
52 volatile uint64_t tx_byte_count;
53 volatile uint64_t tx_pkt_count;
54 volatile uint64_t tx_mbuf_count;
57 #define ARK_DDM_MRDQ 0x0040
58 struct ark_ddm_mrdq_t {
59 volatile uint32_t mrd_q1;
60 volatile uint32_t mrd_q2;
61 volatile uint32_t mrd_q3;
62 volatile uint32_t mrd_q4;
63 volatile uint32_t mrd_full;
66 #define ARK_DDM_CPLDQ 0x0068
67 struct ark_ddm_cpldq_t {
68 volatile uint32_t cpld_q1;
69 volatile uint32_t cpld_q2;
70 volatile uint32_t cpld_q3;
71 volatile uint32_t cpld_q4;
72 volatile uint32_t cpld_full;
75 #define ARK_DDM_MRD_PS 0x0090
76 struct ark_ddm_mrd_ps_t {
77 volatile uint32_t mrd_ps_min;
78 volatile uint32_t mrd_ps_max;
79 volatile uint32_t mrd_full_ps_min;
80 volatile uint32_t mrd_full_ps_max;
81 volatile uint32_t mrd_dw_ps_min;
82 volatile uint32_t mrd_dw_ps_max;
85 #define ARK_DDM_QUEUE_STATS 0x00a8
86 struct ark_ddm_qstats_t {
87 volatile uint64_t byte_count;
88 volatile uint64_t pkt_count;
89 volatile uint64_t mbuf_count;
92 #define ARK_DDM_CPLD_PS 0x00c0
93 struct ark_ddm_cpld_ps_t {
94 volatile uint32_t cpld_ps_min;
95 volatile uint32_t cpld_ps_max;
96 volatile uint32_t cpld_full_ps_min;
97 volatile uint32_t cpld_full_ps_max;
98 volatile uint32_t cpld_dw_ps_min;
99 volatile uint32_t cpld_dw_ps_max;
102 #define ARK_DDM_SETUP 0x00e0
103 struct ark_ddm_setup_t {
104 rte_iova_t cons_write_index_addr;
105 uint32_t write_index_interval; /* 4ns each */
106 volatile uint32_t cons_index;
109 #define ARK_DDM_EXPECTED_SIZE 256
110 #define ARK_DDM_QOFFSET ARK_DDM_EXPECTED_SIZE
111 /* Consolidated structure */
113 struct ark_ddm_cfg_t cfg;
114 uint8_t reserved0[(ARK_DDM_STATS - ARK_DDM_CFG) -
115 sizeof(struct ark_ddm_cfg_t)];
116 struct ark_ddm_stats_t stats;
117 uint8_t reserved1[(ARK_DDM_MRDQ - ARK_DDM_STATS) -
118 sizeof(struct ark_ddm_stats_t)];
119 struct ark_ddm_mrdq_t mrdq;
120 uint8_t reserved2[(ARK_DDM_CPLDQ - ARK_DDM_MRDQ) -
121 sizeof(struct ark_ddm_mrdq_t)];
122 struct ark_ddm_cpldq_t cpldq;
123 uint8_t reserved3[(ARK_DDM_MRD_PS - ARK_DDM_CPLDQ) -
124 sizeof(struct ark_ddm_cpldq_t)];
125 struct ark_ddm_mrd_ps_t mrd_ps;
126 struct ark_ddm_qstats_t queue_stats;
127 struct ark_ddm_cpld_ps_t cpld_ps;
128 uint8_t reserved5[(ARK_DDM_SETUP - ARK_DDM_CPLD_PS) -
129 sizeof(struct ark_ddm_cpld_ps_t)];
130 struct ark_ddm_setup_t setup;
131 uint8_t reserved_p[(ARK_DDM_EXPECTED_SIZE - ARK_DDM_SETUP) -
132 sizeof(struct ark_ddm_setup_t)];
136 /* DDM function prototype */
137 int ark_ddm_verify(struct ark_ddm_t *ddm);
138 void ark_ddm_start(struct ark_ddm_t *ddm);
139 int ark_ddm_stop(struct ark_ddm_t *ddm, const int wait);
140 void ark_ddm_reset(struct ark_ddm_t *ddm);
141 void ark_ddm_stats_reset(struct ark_ddm_t *ddm);
142 void ark_ddm_setup(struct ark_ddm_t *ddm, rte_iova_t cons_addr,
144 void ark_ddm_dump_stats(struct ark_ddm_t *ddm, const char *msg);
145 void ark_ddm_dump(struct ark_ddm_t *ddm, const char *msg);
146 int ark_ddm_is_stopped(struct ark_ddm_t *ddm);
147 uint64_t ark_ddm_queue_byte_count(struct ark_ddm_t *ddm);
148 uint64_t ark_ddm_queue_pkt_count(struct ark_ddm_t *ddm);
149 void ark_ddm_queue_reset_stats(struct ark_ddm_t *ddm);