1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3 
4 #include <linux/rtnetlink.h>
5 #include <net/devlink.h>
6 
7 #include "nfpcore/nfp.h"
8 #include "nfpcore/nfp_nsp.h"
9 #include "nfp_app.h"
10 #include "nfp_main.h"
11 #include "nfp_port.h"
12 
13 static int
14 nfp_devlink_fill_eth_port(struct nfp_port *port,
15 			  struct nfp_eth_table_port *copy)
16 {
17 	struct nfp_eth_table_port *eth_port;
18 
19 	eth_port = __nfp_port_get_eth_port(port);
20 	if (!eth_port)
21 		return -EINVAL;
22 
23 	memcpy(copy, eth_port, sizeof(*eth_port));
24 
25 	return 0;
26 }
27 
28 static int
29 nfp_devlink_fill_eth_port_from_id(struct nfp_pf *pf,
30 				  struct devlink_port *dl_port,
31 				  struct nfp_eth_table_port *copy)
32 {
33 	struct nfp_port *port = container_of(dl_port, struct nfp_port, dl_port);
34 
35 	return nfp_devlink_fill_eth_port(port, copy);
36 }
37 
38 static int
39 nfp_devlink_set_lanes(struct nfp_pf *pf, unsigned int idx, unsigned int lanes)
40 {
41 	struct nfp_nsp *nsp;
42 	int ret;
43 
44 	nsp = nfp_eth_config_start(pf->cpp, idx);
45 	if (IS_ERR(nsp))
46 		return PTR_ERR(nsp);
47 
48 	ret = __nfp_eth_set_split(nsp, lanes);
49 	if (ret) {
50 		nfp_eth_config_cleanup_end(nsp);
51 		return ret;
52 	}
53 
54 	ret = nfp_eth_config_commit_end(nsp);
55 	if (ret < 0)
56 		return ret;
57 	if (ret) /* no change */
58 		return 0;
59 
60 	return nfp_net_refresh_port_table_sync(pf);
61 }
62 
63 static int
64 nfp_devlink_port_split(struct devlink *devlink, struct devlink_port *port,
65 		       unsigned int count, struct netlink_ext_ack *extack)
66 {
67 	struct nfp_pf *pf = devlink_priv(devlink);
68 	struct nfp_eth_table_port eth_port;
69 	unsigned int lanes;
70 	int ret;
71 
72 	rtnl_lock();
73 	ret = nfp_devlink_fill_eth_port_from_id(pf, port, &eth_port);
74 	rtnl_unlock();
75 	if (ret)
76 		return ret;
77 
78 	if (eth_port.port_lanes % count)
79 		return -EINVAL;
80 
81 	/* Special case the 100G CXP -> 2x40G split */
82 	lanes = eth_port.port_lanes / count;
83 	if (eth_port.lanes == 10 && count == 2)
84 		lanes = 8 / count;
85 
86 	return nfp_devlink_set_lanes(pf, eth_port.index, lanes);
87 }
88 
89 static int
90 nfp_devlink_port_unsplit(struct devlink *devlink, struct devlink_port *port,
91 			 struct netlink_ext_ack *extack)
92 {
93 	struct nfp_pf *pf = devlink_priv(devlink);
94 	struct nfp_eth_table_port eth_port;
95 	unsigned int lanes;
96 	int ret;
97 
98 	rtnl_lock();
99 	ret = nfp_devlink_fill_eth_port_from_id(pf, port, &eth_port);
100 	rtnl_unlock();
101 	if (ret)
102 		return ret;
103 
104 	if (!eth_port.is_split)
105 		return -EINVAL;
106 
107 	/* Special case the 100G CXP -> 2x40G unsplit */
108 	lanes = eth_port.port_lanes;
109 	if (eth_port.port_lanes == 8)
110 		lanes = 10;
111 
112 	return nfp_devlink_set_lanes(pf, eth_port.index, lanes);
113 }
114 
115 static int
116 nfp_devlink_sb_pool_get(struct devlink *devlink, unsigned int sb_index,
117 			u16 pool_index, struct devlink_sb_pool_info *pool_info)
118 {
119 	struct nfp_pf *pf = devlink_priv(devlink);
120 
121 	return nfp_shared_buf_pool_get(pf, sb_index, pool_index, pool_info);
122 }
123 
124 static int
125 nfp_devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
126 			u16 pool_index,
127 			u32 size, enum devlink_sb_threshold_type threshold_type,
128 			struct netlink_ext_ack *extack)
129 {
130 	struct nfp_pf *pf = devlink_priv(devlink);
131 
132 	return nfp_shared_buf_pool_set(pf, sb_index, pool_index,
133 				       size, threshold_type);
134 }
135 
136 static int nfp_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
137 {
138 	struct nfp_pf *pf = devlink_priv(devlink);
139 
140 	return nfp_app_eswitch_mode_get(pf->app, mode);
141 }
142 
143 static int nfp_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
144 					struct netlink_ext_ack *extack)
145 {
146 	struct nfp_pf *pf = devlink_priv(devlink);
147 
148 	return nfp_app_eswitch_mode_set(pf->app, mode);
149 }
150 
151 static const struct nfp_devlink_versions_simple {
152 	const char *key;
153 	const char *hwinfo;
154 } nfp_devlink_versions_hwinfo[] = {
155 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,	"assembly.partno", },
156 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_REV,	"assembly.revision", },
157 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_MANUFACTURE, "assembly.vendor", },
158 	{ "board.model", /* code name */		"assembly.model", },
159 };
160 
161 static int
162 nfp_devlink_versions_get_hwinfo(struct nfp_pf *pf, struct devlink_info_req *req)
163 {
164 	unsigned int i;
165 	int err;
166 
167 	for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_hwinfo); i++) {
168 		const struct nfp_devlink_versions_simple *info;
169 		const char *val;
170 
171 		info = &nfp_devlink_versions_hwinfo[i];
172 
173 		val = nfp_hwinfo_lookup(pf->hwinfo, info->hwinfo);
174 		if (!val)
175 			continue;
176 
177 		err = devlink_info_version_fixed_put(req, info->key, val);
178 		if (err)
179 			return err;
180 	}
181 
182 	return 0;
183 }
184 
185 static const struct nfp_devlink_versions {
186 	enum nfp_nsp_versions id;
187 	const char *key;
188 } nfp_devlink_versions_nsp[] = {
189 	{ NFP_VERSIONS_BUNDLE,	DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID, },
190 	{ NFP_VERSIONS_BSP,	DEVLINK_INFO_VERSION_GENERIC_FW_MGMT, },
191 	{ NFP_VERSIONS_CPLD,	"fw.cpld", },
192 	{ NFP_VERSIONS_APP,	DEVLINK_INFO_VERSION_GENERIC_FW_APP, },
193 	{ NFP_VERSIONS_UNDI,	DEVLINK_INFO_VERSION_GENERIC_FW_UNDI, },
194 	{ NFP_VERSIONS_NCSI,	DEVLINK_INFO_VERSION_GENERIC_FW_NCSI, },
195 	{ NFP_VERSIONS_CFGR,	"chip.init", },
196 };
197 
198 static int
199 nfp_devlink_versions_get_nsp(struct devlink_info_req *req, bool flash,
200 			     const u8 *buf, unsigned int size)
201 {
202 	unsigned int i;
203 	int err;
204 
205 	for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_nsp); i++) {
206 		const struct nfp_devlink_versions *info;
207 		const char *version;
208 
209 		info = &nfp_devlink_versions_nsp[i];
210 
211 		version = nfp_nsp_versions_get(info->id, flash, buf, size);
212 		if (IS_ERR(version)) {
213 			if (PTR_ERR(version) == -ENOENT)
214 				continue;
215 			else
216 				return PTR_ERR(version);
217 		}
218 
219 		if (flash)
220 			err = devlink_info_version_stored_put(req, info->key,
221 							      version);
222 		else
223 			err = devlink_info_version_running_put(req, info->key,
224 							       version);
225 		if (err)
226 			return err;
227 	}
228 
229 	return 0;
230 }
231 
232 static int
233 nfp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
234 		     struct netlink_ext_ack *extack)
235 {
236 	struct nfp_pf *pf = devlink_priv(devlink);
237 	const char *sn, *vendor, *part;
238 	struct nfp_nsp *nsp;
239 	char *buf = NULL;
240 	int err;
241 
242 	vendor = nfp_hwinfo_lookup(pf->hwinfo, "assembly.vendor");
243 	part = nfp_hwinfo_lookup(pf->hwinfo, "assembly.partno");
244 	sn = nfp_hwinfo_lookup(pf->hwinfo, "assembly.serial");
245 	if (vendor && part && sn) {
246 		char *buf;
247 
248 		buf = kmalloc(strlen(vendor) + strlen(part) + strlen(sn) + 1,
249 			      GFP_KERNEL);
250 		if (!buf)
251 			return -ENOMEM;
252 
253 		buf[0] = '\0';
254 		strcat(buf, vendor);
255 		strcat(buf, part);
256 		strcat(buf, sn);
257 
258 		err = devlink_info_serial_number_put(req, buf);
259 		kfree(buf);
260 		if (err)
261 			return err;
262 	}
263 
264 	nsp = nfp_nsp_open(pf->cpp);
265 	if (IS_ERR(nsp)) {
266 		NL_SET_ERR_MSG_MOD(extack, "can't access NSP");
267 		return PTR_ERR(nsp);
268 	}
269 
270 	if (nfp_nsp_has_versions(nsp)) {
271 		buf = kzalloc(NFP_NSP_VERSION_BUFSZ, GFP_KERNEL);
272 		if (!buf) {
273 			err = -ENOMEM;
274 			goto err_close_nsp;
275 		}
276 
277 		err = nfp_nsp_versions(nsp, buf, NFP_NSP_VERSION_BUFSZ);
278 		if (err)
279 			goto err_free_buf;
280 
281 		err = nfp_devlink_versions_get_nsp(req, false,
282 						   buf, NFP_NSP_VERSION_BUFSZ);
283 		if (err)
284 			goto err_free_buf;
285 
286 		err = nfp_devlink_versions_get_nsp(req, true,
287 						   buf, NFP_NSP_VERSION_BUFSZ);
288 		if (err)
289 			goto err_free_buf;
290 
291 		kfree(buf);
292 	}
293 
294 	nfp_nsp_close(nsp);
295 
296 	return nfp_devlink_versions_get_hwinfo(pf, req);
297 
298 err_free_buf:
299 	kfree(buf);
300 err_close_nsp:
301 	nfp_nsp_close(nsp);
302 	return err;
303 }
304 
305 static int
306 nfp_devlink_flash_update(struct devlink *devlink,
307 			 struct devlink_flash_update_params *params,
308 			 struct netlink_ext_ack *extack)
309 {
310 	return nfp_flash_update_common(devlink_priv(devlink), params->fw, extack);
311 }
312 
313 const struct devlink_ops nfp_devlink_ops = {
314 	.sb_pool_get		= nfp_devlink_sb_pool_get,
315 	.sb_pool_set		= nfp_devlink_sb_pool_set,
316 	.eswitch_mode_get	= nfp_devlink_eswitch_mode_get,
317 	.eswitch_mode_set	= nfp_devlink_eswitch_mode_set,
318 	.info_get		= nfp_devlink_info_get,
319 	.flash_update		= nfp_devlink_flash_update,
320 };
321 
322 static const struct devlink_port_ops nfp_devlink_port_ops = {
323 	.port_split		= nfp_devlink_port_split,
324 	.port_unsplit		= nfp_devlink_port_unsplit,
325 };
326 
327 int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
328 {
329 	struct devlink_port_attrs attrs = {};
330 	struct nfp_eth_table_port eth_port;
331 	struct devlink *devlink;
332 	const u8 *serial;
333 	int serial_len;
334 	int ret;
335 
336 	SET_NETDEV_DEVLINK_PORT(port->netdev, &port->dl_port);
337 
338 	rtnl_lock();
339 	ret = nfp_devlink_fill_eth_port(port, &eth_port);
340 	rtnl_unlock();
341 	if (ret)
342 		return ret;
343 
344 	attrs.split = eth_port.is_split;
345 	attrs.splittable = eth_port.port_lanes > 1 && !attrs.split;
346 	attrs.lanes = eth_port.port_lanes;
347 	attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
348 	attrs.phys.port_number = eth_port.label_port;
349 	attrs.phys.split_subport_number = eth_port.label_subport;
350 	serial_len = nfp_cpp_serial(port->app->cpp, &serial);
351 	memcpy(attrs.switch_id.id, serial, serial_len);
352 	attrs.switch_id.id_len = serial_len;
353 	devlink_port_attrs_set(&port->dl_port, &attrs);
354 
355 	devlink = priv_to_devlink(app->pf);
356 
357 	return devl_port_register_with_ops(devlink, &port->dl_port,
358 					   port->eth_id, &nfp_devlink_port_ops);
359 }
360 
361 void nfp_devlink_port_unregister(struct nfp_port *port)
362 {
363 	devl_port_unregister(&port->dl_port);
364 }
365