summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/netronome/nfp/nfp_app.c
blob: 3a973282b2bb78aecf29552d3e215809510ec8d0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */

#include <linux/bug.h>
#include <linux/lockdep.h>
#include <linux/rcupdate.h>
#include <linux/skbuff.h>
#include <linux/slab.h>

#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_nffw.h"
#include "nfp_app.h"
#include "nfp_main.h"
#include "nfp_net.h"
#include "nfp_net_repr.h"
#include "nfp_port.h"

static const struct nfp_app_type *apps[] = {
	[NFP_APP_CORE_NIC]	= &app_nic,
#ifdef CONFIG_BPF_SYSCALL
	[NFP_APP_BPF_NIC]	= &app_bpf,
#else
	[NFP_APP_BPF_NIC]	= &app_nic,
#endif
#ifdef CONFIG_NFP_APP_FLOWER
	[NFP_APP_FLOWER_NIC]	= &app_flower,
#endif
#ifdef CONFIG_NFP_APP_ABM_NIC
	[NFP_APP_ACTIVE_BUFFER_MGMT_NIC] = &app_abm,
#endif
};

void nfp_check_rhashtable_empty(void *ptr, void *arg)
{
	WARN_ON_ONCE(1);
}

struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
{
	if (nfp_netdev_is_nfp_net(netdev)) {
		struct nfp_net *nn = netdev_priv(netdev);

		return nn->app;
	}

	if (nfp_netdev_is_nfp_repr(netdev)) {
		struct nfp_repr *repr = netdev_priv(netdev);

		return repr->app;
	}

	WARN(1, "Unknown netdev type for nfp_app\n");

	return NULL;
}

const char *nfp_app_mip_name(struct nfp_app *app)
{
	if (!app || !app->pf->mip)
		return "";
	return nfp_mip_name(app->pf->mip);
}

int nfp_app_ndo_init(struct net_device *netdev)
{
	struct nfp_app *app = nfp_app_from_netdev(netdev);

	if (!app || !app->type->ndo_init)
		return 0;
	return app->type->ndo_init(app, netdev);
}

void nfp_app_ndo_uninit(struct net_device *netdev)
{
	struct nfp_app *app = nfp_app_from_netdev(netdev);

	if (app && app->type->ndo_uninit)
		app->type->ndo_uninit(app, netdev);
}

u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data)
{
	if (!port || !port->app || !port->app->type->port_get_stats)
		return data;
	return port->app->type->port_get_stats(port->app, port, data);
}

int nfp_app_port_get_stats_count(struct nfp_port *port)
{
	if (!port || !port->app || !port->app->type->port_get_stats_count)
		return 0;
	return port->app->type->port_get_stats_count(port->app, port);
}

u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data)
{
	if (!port || !port->app || !port->app->type->port_get_stats_strings)
		return data;
	return port->app->type->port_get_stats_strings(port->app, port, data);
}

struct sk_buff *
nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
{
	struct sk_buff *skb;

	if (nfp_app_ctrl_has_meta(app))
		size += 8;

	skb = alloc_skb(size, priority);
	if (!skb)
		return NULL;

	if (nfp_app_ctrl_has_meta(app))
		skb_reserve(skb, 8);

	return skb;
}

struct nfp_reprs *
nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type)
{
	return rcu_dereference_protected(app->reprs[type],
					 lockdep_is_held(&app->pf->lock));
}

struct nfp_reprs *
nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
		  struct nfp_reprs *reprs)
{
	struct nfp_reprs *old;

	old = nfp_reprs_get_locked(app, type);
	rtnl_lock();
	rcu_assign_pointer(app->reprs[type], reprs);
	rtnl_unlock();

	return old;
}

static void
nfp_app_netdev_feat_change(struct nfp_app *app, struct net_device *netdev)
{
	struct nfp_net *nn;
	unsigned int type;

	if (!nfp_netdev_is_nfp_net(netdev))
		return;
	nn = netdev_priv(netdev);
	if (nn->app != app)
		return;

	for (type = 0; type < __NFP_REPR_TYPE_MAX; type++) {
		struct nfp_reprs *reprs;
		unsigned int i;

		reprs = rtnl_dereference(app->reprs[type]);
		if (!reprs)
			continue;

		for (i = 0; i < reprs->num_reprs; i++) {
			struct net_device *repr;

			repr = rtnl_dereference(reprs->reprs[i]);
			if (!repr)
				continue;

			nfp_repr_transfer_features(repr, netdev);
		}
	}
}

static int
nfp_app_netdev_event(struct notifier_block *nb, unsigned long event, void *ptr)
{
	struct net_device *netdev;
	struct nfp_app *app;

	netdev = netdev_notifier_info_to_dev(ptr);
	app = container_of(nb, struct nfp_app, netdev_nb);

	/* Handle events common code is interested in */
	switch (event) {
	case NETDEV_FEAT_CHANGE:
		nfp_app_netdev_feat_change(app, netdev);
		break;
	}

	/* Call offload specific handlers */
	if (app->type->netdev_event)
		return app->type->netdev_event(app, netdev, event, ptr);
	return NOTIFY_DONE;
}

int nfp_app_start(struct nfp_app *app, struct nfp_net *ctrl)
{
	int err;

	app->ctrl = ctrl;

	if (app->type->start) {
		err = app->type->start(app);
		if (err)
			return err;
	}

	app->netdev_nb.notifier_call = nfp_app_netdev_event;
	err = register_netdevice_notifier(&app->netdev_nb);
	if (err)
		goto err_app_stop;

	return 0;

err_app_stop:
	if (app->type->stop)
		app->type->stop(app);
	return err;
}

void nfp_app_stop(struct nfp_app *app)
{
	unregister_netdevice_notifier(&app->netdev_nb);

	if (app->type->stop)
		app->type->stop(app);
}

struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
{
	struct nfp_app *app;

	if (id >= ARRAY_SIZE(apps) || !apps[id]) {
		nfp_err(pf->cpp, "unknown FW app ID 0x%02hhx, driver too old or support for FW not built in\n", id);
		return ERR_PTR(-EINVAL);
	}

	if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc))
		return ERR_PTR(-EINVAL);
	if (WARN_ON(!apps[id]->ctrl_msg_rx && apps[id]->ctrl_msg_rx_raw))
		return ERR_PTR(-EINVAL);

	app = kzalloc(sizeof(*app), GFP_KERNEL);
	if (!app)
		return ERR_PTR(-ENOMEM);

	app->pf = pf;
	app->cpp = pf->cpp;
	app->pdev = pf->pdev;
	app->type = apps[id];

	return app;
}

void nfp_app_free(struct nfp_app *app)
{
	kfree(app);
}