nfp_port.c

  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(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
 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(port->app->cpp, &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(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(netdev, "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(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 */
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(port->app->cpp, 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(sizeof(*port), GFP_KERNEL);
207	if (!port)
208		return ERR_PTR(-ENOMEM);
209
210	port->netdev = netdev;
211	port->type = type;
212	port->app = app;
213
214	list_add_tail(&port->port_list, &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(&port->port_list);
224	kfree(port);
225}