drivers/net/ethernet/netronome/nfp/nfp_app.c

   1 /*
   2  * Copyright (C) 2017 Netronome Systems, Inc.
   3  *
   4  * This software is dual licensed under the GNU General License Version 2,
   5  * June 1991 as shown in the file COPYING in the top-level directory of this
   6  * source tree or the BSD 2-Clause License provided below.  You have the
   7  * option to license this software under the complete terms of either license.
   8  *
   9  * The BSD 2-Clause License:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      1. Redistributions of source code must retain the above
  16  *         copyright notice, this list of conditions and the following
  17  *         disclaimer.
  18  *
  19  *      2. Redistributions in binary form must reproduce the above
  20  *         copyright notice, this list of conditions and the following
  21  *         disclaimer in the documentation and/or other materials
  22  *         provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/skbuff.h>
  35 #include <linux/slab.h>
  36
  37 #include "nfpcore/nfp_cpp.h"
  38 #include "nfpcore/nfp_nffw.h"
  39 #include "nfp_app.h"
  40 #include "nfp_main.h"
  41 #include "nfp_net.h"
  42 #include "nfp_net_repr.h"
  43
  44 static const struct nfp_app_type *apps[] = {
  45         &app_nic,
  46         &app_bpf,
  47 #ifdef CONFIG_NFP_APP_FLOWER
  48         &app_flower,
  49 #endif
  50 };
  51
  52 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
  53 {
  54         if (nfp_netdev_is_nfp_net(netdev)) {
  55                 struct nfp_net *nn = netdev_priv(netdev);
  56
  57                 return nn->app;
  58         }
  59
  60         if (nfp_netdev_is_nfp_repr(netdev)) {
  61                 struct nfp_repr *repr = netdev_priv(netdev);
  62
  63                 return repr->app;
  64         }
  65
  66         WARN(1, "Unknown netdev type for nfp_app\n");
  67
  68         return NULL;
  69 }
  70
  71 const char *nfp_app_mip_name(struct nfp_app *app)
  72 {
  73         if (!app || !app->pf->mip)
  74                 return "";
  75         return nfp_mip_name(app->pf->mip);
  76 }
  77
  78 struct sk_buff *
  79 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
  80 {
  81         struct sk_buff *skb;
  82
  83         if (nfp_app_ctrl_has_meta(app))
  84                 size += 8;
  85
  86         skb = alloc_skb(size, priority);
  87         if (!skb)
  88                 return NULL;
  89
  90         if (nfp_app_ctrl_has_meta(app))
  91                 skb_reserve(skb, 8);
  92
  93         return skb;
  94 }
  95
  96 struct nfp_reprs *
  97 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
  98                   struct nfp_reprs *reprs)
  99 {
 100         struct nfp_reprs *old;
 101
 102         old = rcu_dereference_protected(app->reprs[type],
 103                                         lockdep_is_held(&app->pf->lock));
 104         if (reprs && old) {
 105                 old = ERR_PTR(-EBUSY);
 106                 goto exit_unlock;
 107         }
 108
 109         rcu_assign_pointer(app->reprs[type], reprs);
 110
 111 exit_unlock:
 112         return old;
 113 }
 114
 115 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
 116 {
 117         struct nfp_app *app;
 118         unsigned int i;
 119
 120         for (i = 0; i < ARRAY_SIZE(apps); i++)
 121                 if (apps[i]->id == id)
 122                         break;
 123         if (i == ARRAY_SIZE(apps)) {
 124                 nfp_err(pf->cpp, "failed to find app with ID 0x%02hhx\n", id);
 125                 return ERR_PTR(-EINVAL);
 126         }
 127
 128         if (WARN_ON(!apps[i]->name || !apps[i]->vnic_alloc))
 129                 return ERR_PTR(-EINVAL);
 130
 131         app = kzalloc(sizeof(*app), GFP_KERNEL);
 132         if (!app)
 133                 return ERR_PTR(-ENOMEM);
 134
 135         app->pf = pf;
 136         app->cpp = pf->cpp;
 137         app->pdev = pf->pdev;
 138         app->type = apps[i];
 139
 140         return app;
 141 }
 142
 143 void nfp_app_free(struct nfp_app *app)
 144 {
 145         kfree(app);
 146 }