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/lockdep.h>
35 #include <net/switchdev.h>
36 
37 #include "nfpcore/nfp_cpp.h"
38 #include "nfpcore/nfp_nsp.h"
39 #include "nfp_app.h"
40 #include "nfp_main.h"
41 #include "nfp_net.h"
42 #include "nfp_port.h"
43 
44 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev)
45 {
46 	if (nfp_netdev_is_nfp_net(netdev)) {
47 		struct nfp_net *nn = netdev_priv(netdev);
48 
49 		return nn->port;
50 	}
51 
52 	if (nfp_netdev_is_nfp_repr(netdev)) {
53 		struct nfp_repr *repr = netdev_priv(netdev);
54 
55 		return repr->port;
56 	}
57 
58 	WARN(1, "Unknown netdev type for nfp_port\n");
59 
60 	return NULL;
61 }
62 
63 static int
64 nfp_port_attr_get(struct net_device *netdev, struct switchdev_attr *attr)
65 {
66 	struct nfp_port *port;
67 
68 	port = nfp_port_from_netdev(netdev);
69 	if (!port)
70 		return -EOPNOTSUPP;
71 
72 	switch (attr->id) {
73 	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: {
74 		const u8 *serial;
75 		/* N.B: attr->u.ppid.id is binary data */
76 		attr->u.ppid.id_len = nfp_cpp_serial(port->app->cpp, &serial);
77 		memcpy(&attr->u.ppid.id, serial, attr->u.ppid.id_len);
78 		break;
79 	}
80 	default:
81 		return -EOPNOTSUPP;
82 	}
83 
84 	return 0;
85 }
86 
87 const struct switchdev_ops nfp_port_switchdev_ops = {
88 	.switchdev_port_attr_get	= nfp_port_attr_get,
89 };
90 
91 int nfp_port_setup_tc(struct net_device *netdev, enum tc_setup_type type,
92 		      void *type_data)
93 {
94 	struct nfp_port *port;
95 
96 	port = nfp_port_from_netdev(netdev);
97 	if (!port)
98 		return -EOPNOTSUPP;
99 
100 	return nfp_app_setup_tc(port->app, netdev, type, type_data);
101 }
102 
103 struct nfp_port *
104 nfp_port_from_id(struct nfp_pf *pf, enum nfp_port_type type, unsigned int id)
105 {
106 	struct nfp_port *port;
107 
108 	lockdep_assert_held(&pf->lock);
109 
110 	if (type != NFP_PORT_PHYS_PORT)
111 		return NULL;
112 
113 	list_for_each_entry(port, &pf->ports, port_list)
114 		if (port->eth_id == id)
115 			return port;
116 
117 	return NULL;
118 }
119 
120 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port)
121 {
122 	if (!port)
123 		return NULL;
124 	if (port->type != NFP_PORT_PHYS_PORT)
125 		return NULL;
126 
127 	return port->eth_port;
128 }
129 
130 struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port)
131 {
132 	if (!__nfp_port_get_eth_port(port))
133 		return NULL;
134 
135 	if (test_bit(NFP_PORT_CHANGED, &port->flags))
136 		if (nfp_net_refresh_eth_port(port))
137 			return NULL;
138 
139 	return __nfp_port_get_eth_port(port);
140 }
141 
142 int
143 nfp_port_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
144 {
145 	struct nfp_eth_table_port *eth_port;
146 	struct nfp_port *port;
147 	int n;
148 
149 	port = nfp_port_from_netdev(netdev);
150 	if (!port)
151 		return -EOPNOTSUPP;
152 
153 	switch (port->type) {
154 	case NFP_PORT_PHYS_PORT:
155 		eth_port = __nfp_port_get_eth_port(port);
156 		if (!eth_port)
157 			return -EOPNOTSUPP;
158 
159 		if (!eth_port->is_split)
160 			n = snprintf(name, len, "p%d", eth_port->label_port);
161 		else
162 			n = snprintf(name, len, "p%ds%d", eth_port->label_port,
163 				     eth_port->label_subport);
164 		break;
165 	case NFP_PORT_PF_PORT:
166 		n = snprintf(name, len, "pf%d", port->pf_id);
167 		break;
168 	case NFP_PORT_VF_PORT:
169 		n = snprintf(name, len, "pf%dvf%d", port->pf_id, port->vf_id);
170 		break;
171 	default:
172 		return -EOPNOTSUPP;
173 	}
174 
175 	if (n >= len)
176 		return -EINVAL;
177 
178 	return 0;
179 }
180 
181 /**
182  * nfp_port_configure() - helper to set the interface configured bit
183  * @netdev:	net_device instance
184  * @configed:	Desired state
185  *
186  * Helper to set the ifup/ifdown state on the PHY only if there is a physical
187  * interface associated with the netdev.
188  *
189  * Return:
190  * 0 - configuration successful (or no change);
191  * -ERRNO - configuration failed.
192  */
193 int nfp_port_configure(struct net_device *netdev, bool configed)
194 {
195 	struct nfp_eth_table_port *eth_port;
196 	struct nfp_port *port;
197 	int err;
198 
199 	port = nfp_port_from_netdev(netdev);
200 	eth_port = __nfp_port_get_eth_port(port);
201 	if (!eth_port)
202 		return 0;
203 
204 	err = nfp_eth_set_configured(port->app->cpp, eth_port->index, configed);
205 	return err < 0 && err != -EOPNOTSUPP ? err : 0;
206 }
207 
208 int nfp_port_init_phy_port(struct nfp_pf *pf, struct nfp_app *app,
209 			   struct nfp_port *port, unsigned int id)
210 {
211 	/* Check if vNIC has external port associated and cfg is OK */
212 	if (!pf->eth_tbl || id >= pf->eth_tbl->count) {
213 		nfp_err(app->cpp,
214 			"NSP port entries don't match vNICs (no entry %d)\n",
215 			id);
216 		return -EINVAL;
217 	}
218 	if (pf->eth_tbl->ports[id].override_changed) {
219 		nfp_warn(app->cpp,
220 			 "Config changed for port #%d, reboot required before port will be operational\n",
221 			 pf->eth_tbl->ports[id].index);
222 		port->type = NFP_PORT_INVALID;
223 		return 0;
224 	}
225 
226 	port->eth_port = &pf->eth_tbl->ports[id];
227 	port->eth_id = pf->eth_tbl->ports[id].index;
228 	if (pf->mac_stats_mem)
229 		port->eth_stats =
230 			pf->mac_stats_mem + port->eth_id * NFP_MAC_STATS_SIZE;
231 
232 	return 0;
233 }
234 
235 struct nfp_port *
236 nfp_port_alloc(struct nfp_app *app, enum nfp_port_type type,
237 	       struct net_device *netdev)
238 {
239 	struct nfp_port *port;
240 
241 	port = kzalloc(sizeof(*port), GFP_KERNEL);
242 	if (!port)
243 		return ERR_PTR(-ENOMEM);
244 
245 	port->netdev = netdev;
246 	port->type = type;
247 	port->app = app;
248 
249 	list_add_tail(&port->port_list, &app->pf->ports);
250 
251 	return port;
252 }
253 
254 void nfp_port_free(struct nfp_port *port)
255 {
256 	if (!port)
257 		return;
258 	list_del(&port->port_list);
259 	kfree(port);
260 }
261