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linux_dsm_epyc7002/drivers/net/ethernet/netronome/nfp/nfp_app.h
John Hurley 167cebeffa nfp: modify app MTU setting callbacks 
Rename the 'change_mtu' app callback to 'check_mtu'. This is called
whenever an MTU change is requested on a netdev. It can reject the
change but is not responsible for implementing it.

Introduce a new 'repr_change_mtu' app callback that is hit when the MTU
of a repr is to be changed. This is responsible for performing the MTU
change and verifying it.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-30 10:18:54 -04:00

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/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _NFP_APP_H
#define _NFP_APP_H 1
#include <net/devlink.h>
#include <trace/events/devlink.h>
#include "nfp_net_repr.h"
struct bpf_prog;
struct net_device;
struct netdev_bpf;
struct netlink_ext_ack;
struct pci_dev;
struct sk_buff;
struct sk_buff;
struct nfp_app;
struct nfp_cpp;
struct nfp_pf;
struct nfp_repr;
struct nfp_net;
enum nfp_app_id {
NFP_APP_CORE_NIC = 0x1,
NFP_APP_BPF_NIC = 0x2,
NFP_APP_FLOWER_NIC = 0x3,
};
extern const struct nfp_app_type app_nic;
extern const struct nfp_app_type app_bpf;
extern const struct nfp_app_type app_flower;
/**
* struct nfp_app_type - application definition
* @id: application ID
* @name: application name
* @ctrl_cap_mask: ctrl vNIC capability mask, allows disabling features like
* IRQMOD which are on by default but counter-productive for
* control messages which are often latency-sensitive
* @ctrl_has_meta: control messages have prepend of type:5/port:CTRL
*
* Callbacks
* @init: perform basic app checks and init
* @clean: clean app state
* @extra_cap: extra capabilities string
* @vnic_alloc: allocate vNICs (assign port types, etc.)
* @vnic_free: free up app's vNIC state
* @vnic_init: vNIC netdev was registered
* @vnic_clean: vNIC netdev about to be unregistered
* @repr_init: representor about to be registered
* @repr_preclean: representor about to unregistered, executed before app
* reference to the it is removed
* @repr_clean: representor about to be unregistered
* @repr_open: representor netdev open callback
* @repr_stop: representor netdev stop callback
* @check_mtu: MTU change request on a netdev (verify it is valid)
* @repr_change_mtu: MTU change request on repr (make and verify change)
* @start: start application logic
* @stop: stop application logic
* @ctrl_msg_rx: control message handler
* @setup_tc: setup TC ndo
* @bpf: BPF ndo offload-related calls
* @xdp_offload: offload an XDP program
* @eswitch_mode_get: get SR-IOV eswitch mode
* @sriov_enable: app-specific sriov initialisation
* @sriov_disable: app-specific sriov clean-up
* @repr_get: get representor netdev
*/
struct nfp_app_type {
enum nfp_app_id id;
const char *name;
u32 ctrl_cap_mask;
bool ctrl_has_meta;
int (*init)(struct nfp_app *app);
void (*clean)(struct nfp_app *app);
const char *(*extra_cap)(struct nfp_app *app, struct nfp_net *nn);
int (*vnic_alloc)(struct nfp_app *app, struct nfp_net *nn,
unsigned int id);
void (*vnic_free)(struct nfp_app *app, struct nfp_net *nn);
int (*vnic_init)(struct nfp_app *app, struct nfp_net *nn);
void (*vnic_clean)(struct nfp_app *app, struct nfp_net *nn);
int (*repr_init)(struct nfp_app *app, struct net_device *netdev);
void (*repr_preclean)(struct nfp_app *app, struct net_device *netdev);
void (*repr_clean)(struct nfp_app *app, struct net_device *netdev);
int (*repr_open)(struct nfp_app *app, struct nfp_repr *repr);
int (*repr_stop)(struct nfp_app *app, struct nfp_repr *repr);
int (*check_mtu)(struct nfp_app *app, struct net_device *netdev,
int new_mtu);
int (*repr_change_mtu)(struct nfp_app *app, struct net_device *netdev,
int new_mtu);
int (*start)(struct nfp_app *app);
void (*stop)(struct nfp_app *app);
void (*ctrl_msg_rx)(struct nfp_app *app, struct sk_buff *skb);
int (*setup_tc)(struct nfp_app *app, struct net_device *netdev,
enum tc_setup_type type, void *type_data);
int (*bpf)(struct nfp_app *app, struct nfp_net *nn,
struct netdev_bpf *xdp);
int (*xdp_offload)(struct nfp_app *app, struct nfp_net *nn,
struct bpf_prog *prog,
struct netlink_ext_ack *extack);
int (*sriov_enable)(struct nfp_app *app, int num_vfs);
void (*sriov_disable)(struct nfp_app *app);
enum devlink_eswitch_mode (*eswitch_mode_get)(struct nfp_app *app);
struct net_device *(*repr_get)(struct nfp_app *app, u32 id);
};
/**
* struct nfp_app - NFP application container
* @pdev: backpointer to PCI device
* @pf: backpointer to NFP PF structure
* @cpp: pointer to the CPP handle
* @ctrl: pointer to ctrl vNIC struct
* @reprs: array of pointers to representors
* @type: pointer to const application ops and info
* @priv: app-specific priv data
*/
struct nfp_app {
struct pci_dev *pdev;
struct nfp_pf *pf;
struct nfp_cpp *cpp;
struct nfp_net *ctrl;
struct nfp_reprs __rcu *reprs[NFP_REPR_TYPE_MAX + 1];
const struct nfp_app_type *type;
void *priv;
};
bool __nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb);
bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb);
static inline int nfp_app_init(struct nfp_app *app)
{
if (!app->type->init)
return 0;
return app->type->init(app);
}
static inline void nfp_app_clean(struct nfp_app *app)
{
if (app->type->clean)
app->type->clean(app);
}
static inline int nfp_app_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
unsigned int id)
{
return app->type->vnic_alloc(app, nn, id);
}
static inline void nfp_app_vnic_free(struct nfp_app *app, struct nfp_net *nn)
{
if (app->type->vnic_free)
app->type->vnic_free(app, nn);
}
static inline int nfp_app_vnic_init(struct nfp_app *app, struct nfp_net *nn)
{
if (!app->type->vnic_init)
return 0;
return app->type->vnic_init(app, nn);
}
static inline void nfp_app_vnic_clean(struct nfp_app *app, struct nfp_net *nn)
{
if (app->type->vnic_clean)
app->type->vnic_clean(app, nn);
}
static inline int nfp_app_repr_open(struct nfp_app *app, struct nfp_repr *repr)
{
if (!app->type->repr_open)
return -EINVAL;
return app->type->repr_open(app, repr);
}
static inline int nfp_app_repr_stop(struct nfp_app *app, struct nfp_repr *repr)
{
if (!app->type->repr_stop)
return -EINVAL;
return app->type->repr_stop(app, repr);
}
static inline int
nfp_app_repr_init(struct nfp_app *app, struct net_device *netdev)
{
if (!app->type->repr_init)
return 0;
return app->type->repr_init(app, netdev);
}
static inline void
nfp_app_repr_preclean(struct nfp_app *app, struct net_device *netdev)
{
if (app->type->repr_preclean)
app->type->repr_preclean(app, netdev);
}
static inline void
nfp_app_repr_clean(struct nfp_app *app, struct net_device *netdev)
{
if (app->type->repr_clean)
app->type->repr_clean(app, netdev);
}
static inline int
nfp_app_check_mtu(struct nfp_app *app, struct net_device *netdev, int new_mtu)
{
if (!app || !app->type->check_mtu)
return 0;
return app->type->check_mtu(app, netdev, new_mtu);
}
static inline int
nfp_app_repr_change_mtu(struct nfp_app *app, struct net_device *netdev,
int new_mtu)
{
if (!app || !app->type->repr_change_mtu)
return 0;
return app->type->repr_change_mtu(app, netdev, new_mtu);
}
static inline int nfp_app_start(struct nfp_app *app, struct nfp_net *ctrl)
{
app->ctrl = ctrl;
if (!app->type->start)
return 0;
return app->type->start(app);
}
static inline void nfp_app_stop(struct nfp_app *app)
{
if (!app->type->stop)
return;
app->type->stop(app);
}
static inline const char *nfp_app_name(struct nfp_app *app)
{
if (!app)
return "";
return app->type->name;
}
static inline bool nfp_app_needs_ctrl_vnic(struct nfp_app *app)
{
return app && app->type->ctrl_msg_rx;
}
static inline bool nfp_app_ctrl_has_meta(struct nfp_app *app)
{
return app->type->ctrl_has_meta;
}
static inline const char *nfp_app_extra_cap(struct nfp_app *app,
struct nfp_net *nn)
{
if (!app || !app->type->extra_cap)
return "";
return app->type->extra_cap(app, nn);
}
static inline bool nfp_app_has_tc(struct nfp_app *app)
{
return app && app->type->setup_tc;
}
static inline int nfp_app_setup_tc(struct nfp_app *app,
struct net_device *netdev,
enum tc_setup_type type, void *type_data)
{
if (!app || !app->type->setup_tc)
return -EOPNOTSUPP;
return app->type->setup_tc(app, netdev, type, type_data);
}
static inline int nfp_app_bpf(struct nfp_app *app, struct nfp_net *nn,
struct netdev_bpf *bpf)
{
if (!app || !app->type->bpf)
return -EINVAL;
return app->type->bpf(app, nn, bpf);
}
static inline int nfp_app_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
struct bpf_prog *prog,
struct netlink_ext_ack *extack)
{
if (!app || !app->type->xdp_offload)
return -EOPNOTSUPP;
return app->type->xdp_offload(app, nn, prog, extack);
}
static inline bool __nfp_app_ctrl_tx(struct nfp_app *app, struct sk_buff *skb)
{
trace_devlink_hwmsg(priv_to_devlink(app->pf), false, 0,
skb->data, skb->len);
return __nfp_ctrl_tx(app->ctrl, skb);
}
static inline bool nfp_app_ctrl_tx(struct nfp_app *app, struct sk_buff *skb)
{
trace_devlink_hwmsg(priv_to_devlink(app->pf), false, 0,
skb->data, skb->len);
return nfp_ctrl_tx(app->ctrl, skb);
}
static inline void nfp_app_ctrl_rx(struct nfp_app *app, struct sk_buff *skb)
{
trace_devlink_hwmsg(priv_to_devlink(app->pf), true, 0,
skb->data, skb->len);
app->type->ctrl_msg_rx(app, skb);
}
static inline int nfp_app_eswitch_mode_get(struct nfp_app *app, u16 *mode)
{
if (!app->type->eswitch_mode_get)
return -EOPNOTSUPP;
*mode = app->type->eswitch_mode_get(app);
return 0;
}
static inline int nfp_app_sriov_enable(struct nfp_app *app, int num_vfs)
{
if (!app || !app->type->sriov_enable)
return -EOPNOTSUPP;
return app->type->sriov_enable(app, num_vfs);
}
static inline void nfp_app_sriov_disable(struct nfp_app *app)
{
if (app && app->type->sriov_disable)
app->type->sriov_disable(app);
}
static inline struct net_device *nfp_app_repr_get(struct nfp_app *app, u32 id)
{
if (unlikely(!app || !app->type->repr_get))
return NULL;
return app->type->repr_get(app, id);
}
struct nfp_app *nfp_app_from_netdev(struct net_device *netdev);
struct nfp_reprs *
nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type);
struct nfp_reprs *
nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
struct nfp_reprs *reprs);
const char *nfp_app_mip_name(struct nfp_app *app);
struct sk_buff *
nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority);
struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id);
void nfp_app_free(struct nfp_app *app);
/* Callbacks shared between apps */
int nfp_app_nic_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
unsigned int id);
#endif
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