ceph/src/spdk/dpdk/drivers/net/ark/ark_ddm.c

   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 /* ************************************************************************* */
  11 int
  12 ark_ddm_verify(struct ark_ddm_t *ddm)
  13 {
  14         if (sizeof(struct ark_ddm_t) != ARK_DDM_EXPECTED_SIZE) {
  15                 PMD_DRV_LOG(ERR, "ARK: DDM structure looks incorrect %d vs %zd\n",
  16                             ARK_DDM_EXPECTED_SIZE, sizeof(struct ark_ddm_t));
  17                 return -1;
  18         }
  19
  20         if (ddm->cfg.const0 != ARK_DDM_CONST) {
  21                 PMD_DRV_LOG(ERR, "ARK: DDM module not found as expected 0x%08x\n",
  22                             ddm->cfg.const0);
  23                 return -1;
  24         }
  25         return 0;
  26 }
  27
  28 void
  29 ark_ddm_start(struct ark_ddm_t *ddm)
  30 {
  31         ddm->cfg.command = 1;
  32 }
  33
  34 int
  35 ark_ddm_stop(struct ark_ddm_t *ddm, const int wait)
  36 {
  37         int cnt = 0;
  38
  39         ddm->cfg.command = 2;
  40         while (wait && (ddm->cfg.stop_flushed & 0x01) == 0) {
  41                 if (cnt++ > 1000)
  42                         return 1;
  43
  44                 usleep(10);
  45         }
  46         return 0;
  47 }
  48
  49 void
  50 ark_ddm_reset(struct ark_ddm_t *ddm)
  51 {
  52         int status;
  53
  54         /* reset only works if ddm has stopped properly. */
  55         status = ark_ddm_stop(ddm, 1);
  56
  57         if (status != 0) {
  58                 PMD_DEBUG_LOG(INFO, "%s  stop failed  doing forced reset\n",
  59                               __func__);
  60                 ddm->cfg.command = 4;
  61                 usleep(10);
  62         }
  63         ddm->cfg.command = 3;
  64 }
  65
  66 void
  67 ark_ddm_setup(struct ark_ddm_t *ddm, rte_iova_t cons_addr, uint32_t interval)
  68 {
  69         ddm->setup.cons_write_index_addr = cons_addr;
  70         ddm->setup.write_index_interval = interval / 4; /* 4 ns period */
  71 }
  72
  73 void
  74 ark_ddm_stats_reset(struct ark_ddm_t *ddm)
  75 {
  76         ddm->cfg.tlp_stats_clear = 1;
  77 }
  78
  79 void
  80 ark_ddm_dump(struct ark_ddm_t *ddm, const char *msg)
  81 {
  82         PMD_FUNC_LOG(DEBUG, "%s Stopped: %d\n", msg,
  83                      ark_ddm_is_stopped(ddm)
  84                      );
  85 }
  86
  87 void
  88 ark_ddm_dump_stats(struct ark_ddm_t *ddm, const char *msg)
  89 {
  90         struct ark_ddm_stats_t *stats = &ddm->stats;
  91
  92         PMD_STATS_LOG(INFO, "DDM Stats: %s"
  93                       ARK_SU64 ARK_SU64 ARK_SU64
  94                       "\n", msg,
  95                       "Bytes:", stats->tx_byte_count,
  96                       "Packets:", stats->tx_pkt_count,
  97                       "MBufs", stats->tx_mbuf_count);
  98 }
  99
 100 int
 101 ark_ddm_is_stopped(struct ark_ddm_t *ddm)
 102 {
 103         return (ddm->cfg.stop_flushed & 0x01) != 0;
 104 }
 105
 106 uint64_t
 107 ark_ddm_queue_byte_count(struct ark_ddm_t *ddm)
 108 {
 109         return ddm->queue_stats.byte_count;
 110 }
 111
 112 uint64_t
 113 ark_ddm_queue_pkt_count(struct ark_ddm_t *ddm)
 114 {
 115         return ddm->queue_stats.pkt_count;
 116 }
 117
 118 void
 119 ark_ddm_queue_reset_stats(struct ark_ddm_t *ddm)
 120 {
 121         ddm->queue_stats.byte_count = 1;
 122 }