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

   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 #ifndef _NFP_APP_H
  35 #define _NFP_APP_H 1
  36
  37 #include <net/devlink.h>
  38
  39 #include "nfp_net_repr.h"
  40
  41 struct bpf_prog;
  42 struct net_device;
  43 struct pci_dev;
  44 struct sk_buff;
  45 struct sk_buff;
  46 struct nfp_app;
  47 struct nfp_cpp;
  48 struct nfp_pf;
  49 struct nfp_repr;
  50 struct nfp_net;
  51
  52 enum nfp_app_id {
  53         NFP_APP_CORE_NIC        = 0x1,
  54         NFP_APP_BPF_NIC         = 0x2,
  55         NFP_APP_FLOWER_NIC      = 0x3,
  56 };
  57
  58 extern const struct nfp_app_type app_nic;
  59 extern const struct nfp_app_type app_bpf;
  60 extern const struct nfp_app_type app_flower;
  61
  62 /**
  63  * struct nfp_app_type - application definition
  64  * @id:         application ID
  65  * @name:       application name
  66  * @ctrl_has_meta:  control messages have prepend of type:5/port:CTRL
  67  *
  68  * Callbacks
  69  * @init:       perform basic app checks and init
  70  * @clean:      clean app state
  71  * @extra_cap:  extra capabilities string
  72  * @vnic_alloc: allocate vNICs (assign port types, etc.)
  73  * @vnic_free:  free up app's vNIC state
  74  * @vnic_init:  vNIC netdev was registered
  75  * @vnic_clean: vNIC netdev about to be unregistered
  76  * @repr_open:  representor netdev open callback
  77  * @repr_stop:  representor netdev stop callback
  78  * @start:      start application logic
  79  * @stop:       stop application logic
  80  * @ctrl_msg_rx:    control message handler
  81  * @setup_tc:   setup TC ndo
  82  * @tc_busy:    TC HW offload busy (rules loaded)
  83  * @xdp_offload:    offload an XDP program
  84  * @eswitch_mode_get:    get SR-IOV eswitch mode
  85  * @sriov_enable: app-specific sriov initialisation
  86  * @sriov_disable: app-specific sriov clean-up
  87  * @repr_get:   get representor netdev
  88  */
  89 struct nfp_app_type {
  90         enum nfp_app_id id;
  91         const char *name;
  92
  93         bool ctrl_has_meta;
  94
  95         int (*init)(struct nfp_app *app);
  96         void (*clean)(struct nfp_app *app);
  97
  98         const char *(*extra_cap)(struct nfp_app *app, struct nfp_net *nn);
  99
 100         int (*vnic_alloc)(struct nfp_app *app, struct nfp_net *nn,
 101                           unsigned int id);
 102         void (*vnic_free)(struct nfp_app *app, struct nfp_net *nn);
 103         int (*vnic_init)(struct nfp_app *app, struct nfp_net *nn);
 104         void (*vnic_clean)(struct nfp_app *app, struct nfp_net *nn);
 105
 106         int (*repr_open)(struct nfp_app *app, struct nfp_repr *repr);
 107         int (*repr_stop)(struct nfp_app *app, struct nfp_repr *repr);
 108
 109         int (*start)(struct nfp_app *app);
 110         void (*stop)(struct nfp_app *app);
 111
 112         void (*ctrl_msg_rx)(struct nfp_app *app, struct sk_buff *skb);
 113
 114         int (*setup_tc)(struct nfp_app *app, struct net_device *netdev,
 115                         enum tc_setup_type type, void *type_data);
 116         bool (*tc_busy)(struct nfp_app *app, struct nfp_net *nn);
 117         int (*xdp_offload)(struct nfp_app *app, struct nfp_net *nn,
 118                            struct bpf_prog *prog);
 119
 120         int (*sriov_enable)(struct nfp_app *app, int num_vfs);
 121         void (*sriov_disable)(struct nfp_app *app);
 122
 123         enum devlink_eswitch_mode (*eswitch_mode_get)(struct nfp_app *app);
 124         struct net_device *(*repr_get)(struct nfp_app *app, u32 id);
 125 };
 126
 127 /**
 128  * struct nfp_app - NFP application container
 129  * @pdev:       backpointer to PCI device
 130  * @pf:         backpointer to NFP PF structure
 131  * @cpp:        pointer to the CPP handle
 132  * @ctrl:       pointer to ctrl vNIC struct
 133  * @reprs:      array of pointers to representors
 134  * @type:       pointer to const application ops and info
 135  * @priv:       app-specific priv data
 136  */
 137 struct nfp_app {
 138         struct pci_dev *pdev;
 139         struct nfp_pf *pf;
 140         struct nfp_cpp *cpp;
 141
 142         struct nfp_net *ctrl;
 143         struct nfp_reprs __rcu *reprs[NFP_REPR_TYPE_MAX + 1];
 144
 145         const struct nfp_app_type *type;
 146         void *priv;
 147 };
 148
 149 bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb);
 150
 151 static inline int nfp_app_init(struct nfp_app *app)
 152 {
 153         if (!app->type->init)
 154                 return 0;
 155         return app->type->init(app);
 156 }
 157
 158 static inline void nfp_app_clean(struct nfp_app *app)
 159 {
 160         if (app->type->clean)
 161                 app->type->clean(app);
 162 }
 163
 164 static inline int nfp_app_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
 165                                      unsigned int id)
 166 {
 167         return app->type->vnic_alloc(app, nn, id);
 168 }
 169
 170 static inline void nfp_app_vnic_free(struct nfp_app *app, struct nfp_net *nn)
 171 {
 172         if (app->type->vnic_free)
 173                 app->type->vnic_free(app, nn);
 174 }
 175
 176 static inline int nfp_app_vnic_init(struct nfp_app *app, struct nfp_net *nn)
 177 {
 178         if (!app->type->vnic_init)
 179                 return 0;
 180         return app->type->vnic_init(app, nn);
 181 }
 182
 183 static inline void nfp_app_vnic_clean(struct nfp_app *app, struct nfp_net *nn)
 184 {
 185         if (app->type->vnic_clean)
 186                 app->type->vnic_clean(app, nn);
 187 }
 188
 189 static inline int nfp_app_repr_open(struct nfp_app *app, struct nfp_repr *repr)
 190 {
 191         if (!app->type->repr_open)
 192                 return -EINVAL;
 193         return app->type->repr_open(app, repr);
 194 }
 195
 196 static inline int nfp_app_repr_stop(struct nfp_app *app, struct nfp_repr *repr)
 197 {
 198         if (!app->type->repr_stop)
 199                 return -EINVAL;
 200         return app->type->repr_stop(app, repr);
 201 }
 202
 203 static inline int nfp_app_start(struct nfp_app *app, struct nfp_net *ctrl)
 204 {
 205         app->ctrl = ctrl;
 206         if (!app->type->start)
 207                 return 0;
 208         return app->type->start(app);
 209 }
 210
 211 static inline void nfp_app_stop(struct nfp_app *app)
 212 {
 213         if (!app->type->stop)
 214                 return;
 215         app->type->stop(app);
 216 }
 217
 218 static inline const char *nfp_app_name(struct nfp_app *app)
 219 {
 220         if (!app)
 221                 return "";
 222         return app->type->name;
 223 }
 224
 225 static inline bool nfp_app_needs_ctrl_vnic(struct nfp_app *app)
 226 {
 227         return app && app->type->ctrl_msg_rx;
 228 }
 229
 230 static inline bool nfp_app_ctrl_has_meta(struct nfp_app *app)
 231 {
 232         return app->type->ctrl_has_meta;
 233 }
 234
 235 static inline const char *nfp_app_extra_cap(struct nfp_app *app,
 236                                             struct nfp_net *nn)
 237 {
 238         if (!app || !app->type->extra_cap)
 239                 return "";
 240         return app->type->extra_cap(app, nn);
 241 }
 242
 243 static inline bool nfp_app_has_tc(struct nfp_app *app)
 244 {
 245         return app && app->type->setup_tc;
 246 }
 247
 248 static inline bool nfp_app_tc_busy(struct nfp_app *app, struct nfp_net *nn)
 249 {
 250         if (!app || !app->type->tc_busy)
 251                 return false;
 252         return app->type->tc_busy(app, nn);
 253 }
 254
 255 static inline int nfp_app_setup_tc(struct nfp_app *app,
 256                                    struct net_device *netdev,
 257                                    enum tc_setup_type type, void *type_data)
 258 {
 259         if (!app || !app->type->setup_tc)
 260                 return -EOPNOTSUPP;
 261         return app->type->setup_tc(app, netdev, type, type_data);
 262 }
 263
 264 static inline int nfp_app_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
 265                                       struct bpf_prog *prog)
 266 {
 267         if (!app || !app->type->xdp_offload)
 268                 return -EOPNOTSUPP;
 269         return app->type->xdp_offload(app, nn, prog);
 270 }
 271
 272 static inline bool nfp_app_ctrl_tx(struct nfp_app *app, struct sk_buff *skb)
 273 {
 274         return nfp_ctrl_tx(app->ctrl, skb);
 275 }
 276
 277 static inline void nfp_app_ctrl_rx(struct nfp_app *app, struct sk_buff *skb)
 278 {
 279         app->type->ctrl_msg_rx(app, skb);
 280 }
 281
 282 static inline int nfp_app_eswitch_mode_get(struct nfp_app *app, u16 *mode)
 283 {
 284         if (!app->type->eswitch_mode_get)
 285                 return -EOPNOTSUPP;
 286
 287         *mode = app->type->eswitch_mode_get(app);
 288
 289         return 0;
 290 }
 291
 292 static inline int nfp_app_sriov_enable(struct nfp_app *app, int num_vfs)
 293 {
 294         if (!app || !app->type->sriov_enable)
 295                 return -EOPNOTSUPP;
 296         return app->type->sriov_enable(app, num_vfs);
 297 }
 298
 299 static inline void nfp_app_sriov_disable(struct nfp_app *app)
 300 {
 301         if (app && app->type->sriov_disable)
 302                 app->type->sriov_disable(app);
 303 }
 304
 305 static inline struct net_device *nfp_app_repr_get(struct nfp_app *app, u32 id)
 306 {
 307         if (unlikely(!app || !app->type->repr_get))
 308                 return NULL;
 309
 310         return app->type->repr_get(app, id);
 311 }
 312
 313 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev);
 314
 315 struct nfp_reprs *
 316 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
 317                   struct nfp_reprs *reprs);
 318
 319 const char *nfp_app_mip_name(struct nfp_app *app);
 320 struct sk_buff *
 321 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority);
 322
 323 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id);
 324 void nfp_app_free(struct nfp_app *app);
 325
 326 /* Callbacks shared between apps */
 327
 328 int nfp_app_nic_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
 329                            unsigned int id);
 330
 331 #endif