drivers/net/wireless/broadcom/brcm80211/brcmfmac/proto.c

   1 /*
   2  * Copyright (c) 2013 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17
  18  #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/netdevice.h>
  21
  22 #include <brcmu_wifi.h>
  23 #include "core.h"
  24 #include "bus.h"
  25 #include "debug.h"
  26 #include "proto.h"
  27 #include "bcdc.h"
  28 #include "msgbuf.h"
  29
  30
  31 int brcmf_proto_attach(struct brcmf_pub *drvr)
  32 {
  33         struct brcmf_proto *proto;
  34
  35         brcmf_dbg(TRACE, "Enter\n");
  36
  37         proto = kzalloc(sizeof(*proto), GFP_ATOMIC);
  38         if (!proto)
  39                 goto fail;
  40
  41         drvr->proto = proto;
  42
  43         if (drvr->bus_if->proto_type == BRCMF_PROTO_BCDC) {
  44                 if (brcmf_proto_bcdc_attach(drvr))
  45                         goto fail;
  46         } else if (drvr->bus_if->proto_type == BRCMF_PROTO_MSGBUF) {
  47                 if (brcmf_proto_msgbuf_attach(drvr))
  48                         goto fail;
  49         } else {
  50                 brcmf_err("Unsupported proto type %d\n",
  51                           drvr->bus_if->proto_type);
  52                 goto fail;
  53         }
  54         if (!proto->tx_queue_data || (proto->hdrpull == NULL) ||
  55             (proto->query_dcmd == NULL) || (proto->set_dcmd == NULL) ||
  56             (proto->configure_addr_mode == NULL) ||
  57             (proto->delete_peer == NULL) || (proto->add_tdls_peer == NULL) ||
  58             (proto->debugfs_create == NULL)) {
  59                 brcmf_err("Not all proto handlers have been installed\n");
  60                 goto fail;
  61         }
  62         return 0;
  63
  64 fail:
  65         kfree(proto);
  66         drvr->proto = NULL;
  67         return -ENOMEM;
  68 }
  69
  70 void brcmf_proto_detach_post_delif(struct brcmf_pub *drvr)
  71 {
  72         brcmf_dbg(TRACE, "Enter\n");
  73
  74         if (drvr->proto) {
  75                 if (drvr->bus_if->proto_type == BRCMF_PROTO_BCDC)
  76                         brcmf_proto_bcdc_detach_post_delif(drvr);
  77                 else if (drvr->bus_if->proto_type == BRCMF_PROTO_MSGBUF)
  78                         brcmf_proto_msgbuf_detach(drvr);
  79                 kfree(drvr->proto);
  80                 drvr->proto = NULL;
  81         }
  82 }
  83
  84 void brcmf_proto_detach_pre_delif(struct brcmf_pub *drvr)
  85 {
  86         if (drvr->proto && drvr->bus_if->proto_type == BRCMF_PROTO_BCDC)
  87                 brcmf_proto_bcdc_detach_pre_delif(drvr);
  88 }