1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3 
4 #include <linux/lockdep.h>
5 #include <linux/netdevice.h>
6 
7 #include "nfpcore/nfp_cpp.h"
8 #include "nfpcore/nfp_nsp.h"
9 #include "nfp_app.h"
10 #include "nfp_main.h"
11 #include "nfp_net.h"
12 #include "nfp_port.h"
13 
14 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev)
15 {
16 	if (nfp_netdev_is_nfp_net(netdev)) {
17 		struct nfp_net *nn = netdev_priv(netdev);
18 
19 		return nn->port;
20 	}
21 
22 	if (nfp_netdev_is_nfp_repr(netdev)) {
23 		struct nfp_repr *repr = netdev_priv(netdev);
24 
25 		return repr->port;
26 	}
27 
28 	WARN(1, "Unknown netdev type for nfp_port\n");
29 
30 	return NULL;
31 }
32 
33 int nfp_port_get_port_parent_id(struct net_device *netdev,
34 				struct netdev_phys_item_id *ppid)
35 {
36 	struct nfp_port *port;
37 	const u8 *serial;
38 
39 	port = nfp_port_from_netdev(netdev);
40 	if (!port)
41 		return -EOPNOTSUPP;
42 
43 	ppid->id_len = nfp_cpp_serial(port->app->cpp, &serial);
44 	memcpy(&ppid->id, serial, ppid->id_len);
45 
46 	return 0;
47 }
48 
49 int nfp_port_setup_tc(struct net_device *netdev, enum tc_setup_type type,
50 		      void *type_data)
51 {
52 	struct nfp_port *port;
53 
54 	port = nfp_port_from_netdev(netdev);
55 	if (!port)
56 		return -EOPNOTSUPP;
57 
58 	return nfp_app_setup_tc(port->app, netdev, type, type_data);
59 }
60 
61 int nfp_port_set_features(struct net_device *netdev, netdev_features_t features)
62 {
63 	struct nfp_port *port;
64 
65 	port = nfp_port_from_netdev(netdev);
66 	if (!port)
67 		return 0;
68 
69 	if ((netdev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
70 	    port->tc_offload_cnt) {
71 		netdev_err(netdev, "Cannot disable HW TC offload while offloads active\n");
72 		return -EBUSY;
73 	}
74 
75 	return 0;
76 }
77 
78 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port)
79 {
80 	if (!port)
81 		return NULL;
82 	if (port->type != NFP_PORT_PHYS_PORT)
83 		return NULL;
84 
85 	return port->eth_port;
86 }
87 
88 struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port)
89 {
90 	if (!__nfp_port_get_eth_port(port))
91 		return NULL;
92 
93 	if (test_bit(NFP_PORT_CHANGED, &port->flags))
94 		if (nfp_net_refresh_eth_port(port))
95 			return NULL;
96 
97 	return __nfp_port_get_eth_port(port);
98 }
99 
100 int
101 nfp_port_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
102 {
103 	struct nfp_eth_table_port *eth_port;
104 	struct nfp_port *port;
105 	int n;
106 
107 	port = nfp_port_from_netdev(netdev);
108 	if (!port)
109 		return -EOPNOTSUPP;
110 
111 	switch (port->type) {
112 	case NFP_PORT_PHYS_PORT:
113 		eth_port = __nfp_port_get_eth_port(port);
114 		if (!eth_port)
115 			return -EOPNOTSUPP;
116 
117 		if (!eth_port->is_split)
118 			n = snprintf(name, len, "p%d", eth_port->label_port);
119 		else
120 			n = snprintf(name, len, "p%ds%d", eth_port->label_port,
121 				     eth_port->label_subport);
122 		break;
123 	case NFP_PORT_PF_PORT:
124 		if (!port->pf_split)
125 			n = snprintf(name, len, "pf%d", port->pf_id);
126 		else
127 			n = snprintf(name, len, "pf%ds%d", port->pf_id,
128 				     port->pf_split_id);
129 		break;
130 	case NFP_PORT_VF_PORT:
131 		n = snprintf(name, len, "pf%dvf%d", port->pf_id, port->vf_id);
132 		break;
133 	default:
134 		return -EOPNOTSUPP;
135 	}
136 
137 	if (n >= len)
138 		return -EINVAL;
139 
140 	return 0;
141 }
142 
143 /**
144  * nfp_port_configure() - helper to set the interface configured bit
145  * @netdev:	net_device instance
146  * @configed:	Desired state
147  *
148  * Helper to set the ifup/ifdown state on the PHY only if there is a physical
149  * interface associated with the netdev.
150  *
151  * Return:
152  * 0 - configuration successful (or no change);
153  * -ERRNO - configuration failed.
154  */
155 int nfp_port_configure(struct net_device *netdev, bool configed)
156 {
157 	struct nfp_eth_table_port *eth_port;
158 	struct nfp_port *port;
159 	int err;
160 
161 	port = nfp_port_from_netdev(netdev);
162 	eth_port = __nfp_port_get_eth_port(port);
163 	if (!eth_port)
164 		return 0;
165 	if (port->eth_forced)
166 		return 0;
167 
168 	err = nfp_eth_set_configured(port->app->cpp, eth_port->index, configed);
169 	return err < 0 && err != -EOPNOTSUPP ? err : 0;
170 }
171 
172 int nfp_port_init_phy_port(struct nfp_pf *pf, struct nfp_app *app,
173 			   struct nfp_port *port, unsigned int id)
174 {
175 	/* Check if vNIC has external port associated and cfg is OK */
176 	if (!pf->eth_tbl || id >= pf->eth_tbl->count) {
177 		nfp_err(app->cpp,
178 			"NSP port entries don't match vNICs (no entry %d)\n",
179 			id);
180 		return -EINVAL;
181 	}
182 	if (pf->eth_tbl->ports[id].override_changed) {
183 		nfp_warn(app->cpp,
184 			 "Config changed for port #%d, reboot required before port will be operational\n",
185 			 pf->eth_tbl->ports[id].index);
186 		port->type = NFP_PORT_INVALID;
187 		return 0;
188 	}
189 
190 	port->eth_port = &pf->eth_tbl->ports[id];
191 	port->eth_id = pf->eth_tbl->ports[id].index;
192 	if (pf->mac_stats_mem)
193 		port->eth_stats =
194 			pf->mac_stats_mem + port->eth_id * NFP_MAC_STATS_SIZE;
195 
196 	return 0;
197 }
198 
199 struct nfp_port *
200 nfp_port_alloc(struct nfp_app *app, enum nfp_port_type type,
201 	       struct net_device *netdev)
202 {
203 	struct nfp_port *port;
204 
205 	port = kzalloc(sizeof(*port), GFP_KERNEL);
206 	if (!port)
207 		return ERR_PTR(-ENOMEM);
208 
209 	port->netdev = netdev;
210 	port->type = type;
211 	port->app = app;
212 
213 	list_add_tail(&port->port_list, &app->pf->ports);
214 
215 	return port;
216 }
217 
218 void nfp_port_free(struct nfp_port *port)
219 {
220 	if (!port)
221 		return;
222 	list_del(&port->port_list);
223 	kfree(port);
224 }
225