drivers/net/wireless/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 "dhd.h"
  24 #include "dhd_dbg.h"
  25 #include "proto.h"
  26 #include "bcdc.h"
  27
  28
  29 int brcmf_proto_attach(struct brcmf_pub *drvr)
  30 {
  31         struct brcmf_proto *proto;
  32
  33         proto = kzalloc(sizeof(*proto), GFP_ATOMIC);
  34         if (!proto)
  35                 goto fail;
  36
  37         drvr->proto = proto;
  38         /* BCDC protocol is only protocol supported for the moment */
  39         if (brcmf_proto_bcdc_attach(drvr))
  40                 goto fail;
  41
  42         if ((proto->txdata == NULL) || (proto->hdrpull == NULL) ||
  43             (proto->query_dcmd == NULL) || (proto->set_dcmd == NULL)) {
  44                 brcmf_err("Not all proto handlers have been installed\n");
  45                 goto fail;
  46         }
  47         return 0;
  48
  49 fail:
  50         kfree(proto);
  51         drvr->proto = NULL;
  52         return -ENOMEM;
  53 }
  54
  55 void brcmf_proto_detach(struct brcmf_pub *drvr)
  56 {
  57         if (drvr->proto) {
  58                 brcmf_proto_bcdc_detach(drvr);
  59                 kfree(drvr->proto);
  60                 drvr->proto = NULL;
  61         }
  62 }