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/bug.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/rcupdate.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/slab.h>
  39
  40 #include "nfpcore/nfp_cpp.h"
  41 #include "nfpcore/nfp_nffw.h"
  42 #include "nfp_app.h"
  43 #include "nfp_main.h"
  44 #include "nfp_net.h"
  45 #include "nfp_net_repr.h"
  46
  47 static const struct nfp_app_type *apps[] = {
  48         [NFP_APP_CORE_NIC]      = &app_nic,
  49 #ifdef CONFIG_BPF_SYSCALL
  50         [NFP_APP_BPF_NIC]       = &app_bpf,
  51 #else
  52         [NFP_APP_BPF_NIC]       = &app_nic,
  53 #endif
  54 #ifdef CONFIG_NFP_APP_FLOWER
  55         [NFP_APP_FLOWER_NIC]    = &app_flower,
  56 #endif
  57 };
  58
  59 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
  60 {
  61         if (nfp_netdev_is_nfp_net(netdev)) {
  62                 struct nfp_net *nn = netdev_priv(netdev);
  63
  64                 return nn->app;
  65         }
  66
  67         if (nfp_netdev_is_nfp_repr(netdev)) {
  68                 struct nfp_repr *repr = netdev_priv(netdev);
  69
  70                 return repr->app;
  71         }
  72
  73         WARN(1, "Unknown netdev type for nfp_app\n");
  74
  75         return NULL;
  76 }
  77
  78 const char *nfp_app_mip_name(struct nfp_app *app)
  79 {
  80         if (!app || !app->pf->mip)
  81                 return "";
  82         return nfp_mip_name(app->pf->mip);
  83 }
  84
  85 struct sk_buff *
  86 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
  87 {
  88         struct sk_buff *skb;
  89
  90         if (nfp_app_ctrl_has_meta(app))
  91                 size += 8;
  92
  93         skb = alloc_skb(size, priority);
  94         if (!skb)
  95                 return NULL;
  96
  97         if (nfp_app_ctrl_has_meta(app))
  98                 skb_reserve(skb, 8);
  99
 100         return skb;
 101 }
 102
 103 struct nfp_reprs *
 104 nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type)
 105 {
 106         return rcu_dereference_protected(app->reprs[type],
 107                                          lockdep_is_held(&app->pf->lock));
 108 }
 109
 110 struct nfp_reprs *
 111 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
 112                   struct nfp_reprs *reprs)
 113 {
 114         struct nfp_reprs *old;
 115
 116         old = nfp_reprs_get_locked(app, type);
 117         rcu_assign_pointer(app->reprs[type], reprs);
 118
 119         return old;
 120 }
 121
 122 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
 123 {
 124         struct nfp_app *app;
 125
 126         if (id >= ARRAY_SIZE(apps) || !apps[id]) {
 127                 nfp_err(pf->cpp, "unknown FW app ID 0x%02hhx, driver too old or support for FW not built in\n", id);
 128                 return ERR_PTR(-EINVAL);
 129         }
 130
 131         if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc))
 132                 return ERR_PTR(-EINVAL);
 133
 134         app = kzalloc(sizeof(*app), GFP_KERNEL);
 135         if (!app)
 136                 return ERR_PTR(-ENOMEM);
 137
 138         app->pf = pf;
 139         app->cpp = pf->cpp;
 140         app->pdev = pf->pdev;
 141         app->type = apps[id];
 142
 143         return app;
 144 }
 145
 146 void nfp_app_free(struct nfp_app *app)
 147 {
 148         kfree(app);
 149 }