drivers/net/sfc/sfc_dp.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright (c) 2017-2018 Solarflare Communications Inc.
   4  * All rights reserved.
   5  *
   6  * This software was jointly developed between OKTET Labs (under contract
   7  * for Solarflare) and Solarflare Communications, Inc.
   8  */
   9
  10 #include <sys/queue.h>
  11 #include <string.h>
  12 #include <errno.h>
  13
  14 #include <rte_log.h>
  15
  16 #include "sfc_dp.h"
  17 #include "sfc_log.h"
  18
  19 void
  20 sfc_dp_queue_init(struct sfc_dp_queue *dpq, uint16_t port_id, uint16_t queue_id,
  21                   const struct rte_pci_addr *pci_addr)
  22 {
  23         dpq->port_id = port_id;
  24         dpq->queue_id = queue_id;
  25         dpq->pci_addr = *pci_addr;
  26 }
  27
  28 struct sfc_dp *
  29 sfc_dp_find_by_name(struct sfc_dp_list *head, enum sfc_dp_type type,
  30                     const char *name)
  31 {
  32         struct sfc_dp *entry;
  33
  34         TAILQ_FOREACH(entry, head, links) {
  35                 if (entry->type != type)
  36                         continue;
  37
  38                 if (strcmp(entry->name, name) == 0)
  39                         return entry;
  40         }
  41
  42         return NULL;
  43 }
  44
  45 struct sfc_dp *
  46 sfc_dp_find_by_caps(struct sfc_dp_list *head, enum sfc_dp_type type,
  47                     unsigned int avail_caps)
  48 {
  49         struct sfc_dp *entry;
  50
  51         TAILQ_FOREACH(entry, head, links) {
  52                 if (entry->type != type)
  53                         continue;
  54
  55                 /* Take the first matching */
  56                 if (sfc_dp_match_hw_fw_caps(entry, avail_caps))
  57                         return entry;
  58         }
  59
  60         return NULL;
  61 }
  62
  63 int
  64 sfc_dp_register(struct sfc_dp_list *head, struct sfc_dp *entry)
  65 {
  66         if (sfc_dp_find_by_name(head, entry->type, entry->name) != NULL) {
  67                 SFC_GENERIC_LOG(ERR,
  68                         "sfc %s dapapath '%s' already registered",
  69                         entry->type == SFC_DP_RX ? "Rx" :
  70                         entry->type == SFC_DP_TX ? "Tx" :
  71                         "unknown",
  72                         entry->name);
  73                 return EEXIST;
  74         }
  75
  76         TAILQ_INSERT_TAIL(head, entry, links);
  77
  78         return 0;
  79 }