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
14struct 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(dev: netdev);
18
19 return nn->port;
20 }
21
22 if (nfp_netdev_is_nfp_repr(netdev)) {
23 struct nfp_repr *repr = netdev_priv(dev: netdev);
24
25 return repr->port;
26 }
27
28 WARN(1, "Unknown netdev type for nfp_port\n");
29
30 return NULL;
31}
32
33int 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(cpp: port->app->cpp, serial: &serial);
44 memcpy(&ppid->id, serial, ppid->id_len);
45
46 return 0;
47}
48
49int 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(app: port->app, netdev, type, type_data);
59}
60
61int 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(dev: netdev, format: "Cannot disable HW TC offload while offloads active\n");
72 return -EBUSY;
73 }
74
75 return 0;
76}
77
78struct 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
88struct 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
100int
101nfp_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(buf: name, size: len, fmt: "p%d", eth_port->label_port);
119 else
120 n = snprintf(buf: name, size: len, fmt: "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(buf: name, size: len, fmt: "pf%d", port->pf_id);
126 else
127 n = snprintf(buf: name, size: len, fmt: "pf%ds%d", port->pf_id,
128 port->pf_split_id);
129 break;
130 case NFP_PORT_VF_PORT:
131 n = snprintf(buf: name, size: len, fmt: "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 */
155int 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(cpp: port->app->cpp, idx: eth_port->index, configed);
169 return err < 0 && err != -EOPNOTSUPP ? err : 0;
170}
171
172int 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 port->netdev->dev_port = id;
193 if (pf->mac_stats_mem)
194 port->eth_stats =
195 pf->mac_stats_mem + port->eth_id * NFP_MAC_STATS_SIZE;
196
197 return 0;
198}
199
200struct nfp_port *
201nfp_port_alloc(struct nfp_app *app, enum nfp_port_type type,
202 struct net_device *netdev)
203{
204 struct nfp_port *port;
205
206 port = kzalloc(size: sizeof(*port), GFP_KERNEL);
207 if (!port)
208 return ERR_PTR(error: -ENOMEM);
209
210 port->netdev = netdev;
211 port->type = type;
212 port->app = app;
213
214 list_add_tail(new: &port->port_list, head: &app->pf->ports);
215
216 return port;
217}
218
219void nfp_port_free(struct nfp_port *port)
220{
221 if (!port)
222 return;
223 list_del(entry: &port->port_list);
224 kfree(objp: port);
225}
226

source code of linux/drivers/net/ethernet/netronome/nfp/nfp_port.c