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, unsigned int port_index,
30 				  struct nfp_eth_table_port *copy)
31 {
32 	struct nfp_port *port;
33 
34 	port = nfp_port_from_id(pf, NFP_PORT_PHYS_PORT, port_index);
35 
36 	return nfp_devlink_fill_eth_port(port, copy);
37 }
38 
39 static int
40 nfp_devlink_set_lanes(struct nfp_pf *pf, unsigned int idx, unsigned int lanes)
41 {
42 	struct nfp_nsp *nsp;
43 	int ret;
44 
45 	nsp = nfp_eth_config_start(pf->cpp, idx);
46 	if (IS_ERR(nsp))
47 		return PTR_ERR(nsp);
48 
49 	ret = __nfp_eth_set_split(nsp, lanes);
50 	if (ret) {
51 		nfp_eth_config_cleanup_end(nsp);
52 		return ret;
53 	}
54 
55 	ret = nfp_eth_config_commit_end(nsp);
56 	if (ret < 0)
57 		return ret;
58 	if (ret) /* no change */
59 		return 0;
60 
61 	return nfp_net_refresh_port_table_sync(pf);
62 }
63 
64 static int
65 nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
66 		       unsigned int count, struct netlink_ext_ack *extack)
67 {
68 	struct nfp_pf *pf = devlink_priv(devlink);
69 	struct nfp_eth_table_port eth_port;
70 	unsigned int lanes;
71 	int ret;
72 
73 	mutex_lock(&pf->lock);
74 
75 	rtnl_lock();
76 	ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, &eth_port);
77 	rtnl_unlock();
78 	if (ret)
79 		goto out;
80 
81 	if (eth_port.port_lanes % count) {
82 		ret = -EINVAL;
83 		goto out;
84 	}
85 
86 	/* Special case the 100G CXP -> 2x40G split */
87 	lanes = eth_port.port_lanes / count;
88 	if (eth_port.lanes == 10 && count == 2)
89 		lanes = 8 / count;
90 
91 	ret = nfp_devlink_set_lanes(pf, eth_port.index, lanes);
92 out:
93 	mutex_unlock(&pf->lock);
94 
95 	return ret;
96 }
97 
98 static int
99 nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index,
100 			 struct netlink_ext_ack *extack)
101 {
102 	struct nfp_pf *pf = devlink_priv(devlink);
103 	struct nfp_eth_table_port eth_port;
104 	unsigned int lanes;
105 	int ret;
106 
107 	mutex_lock(&pf->lock);
108 
109 	rtnl_lock();
110 	ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, &eth_port);
111 	rtnl_unlock();
112 	if (ret)
113 		goto out;
114 
115 	if (!eth_port.is_split) {
116 		ret = -EINVAL;
117 		goto out;
118 	}
119 
120 	/* Special case the 100G CXP -> 2x40G unsplit */
121 	lanes = eth_port.port_lanes;
122 	if (eth_port.port_lanes == 8)
123 		lanes = 10;
124 
125 	ret = nfp_devlink_set_lanes(pf, eth_port.index, lanes);
126 out:
127 	mutex_unlock(&pf->lock);
128 
129 	return ret;
130 }
131 
132 static int
133 nfp_devlink_sb_pool_get(struct devlink *devlink, unsigned int sb_index,
134 			u16 pool_index, struct devlink_sb_pool_info *pool_info)
135 {
136 	struct nfp_pf *pf = devlink_priv(devlink);
137 
138 	return nfp_shared_buf_pool_get(pf, sb_index, pool_index, pool_info);
139 }
140 
141 static int
142 nfp_devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
143 			u16 pool_index,
144 			u32 size, enum devlink_sb_threshold_type threshold_type,
145 			struct netlink_ext_ack *extack)
146 {
147 	struct nfp_pf *pf = devlink_priv(devlink);
148 
149 	return nfp_shared_buf_pool_set(pf, sb_index, pool_index,
150 				       size, threshold_type);
151 }
152 
153 static int nfp_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
154 {
155 	struct nfp_pf *pf = devlink_priv(devlink);
156 
157 	return nfp_app_eswitch_mode_get(pf->app, mode);
158 }
159 
160 static int nfp_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
161 					struct netlink_ext_ack *extack)
162 {
163 	struct nfp_pf *pf = devlink_priv(devlink);
164 	int ret;
165 
166 	mutex_lock(&pf->lock);
167 	ret = nfp_app_eswitch_mode_set(pf->app, mode);
168 	mutex_unlock(&pf->lock);
169 
170 	return ret;
171 }
172 
173 static const struct nfp_devlink_versions_simple {
174 	const char *key;
175 	const char *hwinfo;
176 } nfp_devlink_versions_hwinfo[] = {
177 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,	"assembly.partno", },
178 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_REV,	"assembly.revision", },
179 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_MANUFACTURE, "assembly.vendor", },
180 	{ "board.model", /* code name */		"assembly.model", },
181 };
182 
183 static int
184 nfp_devlink_versions_get_hwinfo(struct nfp_pf *pf, struct devlink_info_req *req)
185 {
186 	unsigned int i;
187 	int err;
188 
189 	for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_hwinfo); i++) {
190 		const struct nfp_devlink_versions_simple *info;
191 		const char *val;
192 
193 		info = &nfp_devlink_versions_hwinfo[i];
194 
195 		val = nfp_hwinfo_lookup(pf->hwinfo, info->hwinfo);
196 		if (!val)
197 			continue;
198 
199 		err = devlink_info_version_fixed_put(req, info->key, val);
200 		if (err)
201 			return err;
202 	}
203 
204 	return 0;
205 }
206 
207 static const struct nfp_devlink_versions {
208 	enum nfp_nsp_versions id;
209 	const char *key;
210 } nfp_devlink_versions_nsp[] = {
211 	{ NFP_VERSIONS_BUNDLE,	DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID, },
212 	{ NFP_VERSIONS_BSP,	DEVLINK_INFO_VERSION_GENERIC_FW_MGMT, },
213 	{ NFP_VERSIONS_CPLD,	"fw.cpld", },
214 	{ NFP_VERSIONS_APP,	DEVLINK_INFO_VERSION_GENERIC_FW_APP, },
215 	{ NFP_VERSIONS_UNDI,	DEVLINK_INFO_VERSION_GENERIC_FW_UNDI, },
216 	{ NFP_VERSIONS_NCSI,	DEVLINK_INFO_VERSION_GENERIC_FW_NCSI, },
217 	{ NFP_VERSIONS_CFGR,	"chip.init", },
218 };
219 
220 static int
221 nfp_devlink_versions_get_nsp(struct devlink_info_req *req, bool flash,
222 			     const u8 *buf, unsigned int size)
223 {
224 	unsigned int i;
225 	int err;
226 
227 	for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_nsp); i++) {
228 		const struct nfp_devlink_versions *info;
229 		const char *version;
230 
231 		info = &nfp_devlink_versions_nsp[i];
232 
233 		version = nfp_nsp_versions_get(info->id, flash, buf, size);
234 		if (IS_ERR(version)) {
235 			if (PTR_ERR(version) == -ENOENT)
236 				continue;
237 			else
238 				return PTR_ERR(version);
239 		}
240 
241 		if (flash)
242 			err = devlink_info_version_stored_put(req, info->key,
243 							      version);
244 		else
245 			err = devlink_info_version_running_put(req, info->key,
246 							       version);
247 		if (err)
248 			return err;
249 	}
250 
251 	return 0;
252 }
253 
254 static int
255 nfp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
256 		     struct netlink_ext_ack *extack)
257 {
258 	struct nfp_pf *pf = devlink_priv(devlink);
259 	const char *sn, *vendor, *part;
260 	struct nfp_nsp *nsp;
261 	char *buf = NULL;
262 	int err;
263 
264 	err = devlink_info_driver_name_put(req, "nfp");
265 	if (err)
266 		return err;
267 
268 	vendor = nfp_hwinfo_lookup(pf->hwinfo, "assembly.vendor");
269 	part = nfp_hwinfo_lookup(pf->hwinfo, "assembly.partno");
270 	sn = nfp_hwinfo_lookup(pf->hwinfo, "assembly.serial");
271 	if (vendor && part && sn) {
272 		char *buf;
273 
274 		buf = kmalloc(strlen(vendor) + strlen(part) + strlen(sn) + 1,
275 			      GFP_KERNEL);
276 		if (!buf)
277 			return -ENOMEM;
278 
279 		buf[0] = '\0';
280 		strcat(buf, vendor);
281 		strcat(buf, part);
282 		strcat(buf, sn);
283 
284 		err = devlink_info_serial_number_put(req, buf);
285 		kfree(buf);
286 		if (err)
287 			return err;
288 	}
289 
290 	nsp = nfp_nsp_open(pf->cpp);
291 	if (IS_ERR(nsp)) {
292 		NL_SET_ERR_MSG_MOD(extack, "can't access NSP");
293 		return PTR_ERR(nsp);
294 	}
295 
296 	if (nfp_nsp_has_versions(nsp)) {
297 		buf = kzalloc(NFP_NSP_VERSION_BUFSZ, GFP_KERNEL);
298 		if (!buf) {
299 			err = -ENOMEM;
300 			goto err_close_nsp;
301 		}
302 
303 		err = nfp_nsp_versions(nsp, buf, NFP_NSP_VERSION_BUFSZ);
304 		if (err)
305 			goto err_free_buf;
306 
307 		err = nfp_devlink_versions_get_nsp(req, false,
308 						   buf, NFP_NSP_VERSION_BUFSZ);
309 		if (err)
310 			goto err_free_buf;
311 
312 		err = nfp_devlink_versions_get_nsp(req, true,
313 						   buf, NFP_NSP_VERSION_BUFSZ);
314 		if (err)
315 			goto err_free_buf;
316 
317 		kfree(buf);
318 	}
319 
320 	nfp_nsp_close(nsp);
321 
322 	return nfp_devlink_versions_get_hwinfo(pf, req);
323 
324 err_free_buf:
325 	kfree(buf);
326 err_close_nsp:
327 	nfp_nsp_close(nsp);
328 	return err;
329 }
330 
331 static int
332 nfp_devlink_flash_update(struct devlink *devlink, const char *path,
333 			 const char *component, struct netlink_ext_ack *extack)
334 {
335 	if (component)
336 		return -EOPNOTSUPP;
337 	return nfp_flash_update_common(devlink_priv(devlink), path, extack);
338 }
339 
340 const struct devlink_ops nfp_devlink_ops = {
341 	.port_split		= nfp_devlink_port_split,
342 	.port_unsplit		= nfp_devlink_port_unsplit,
343 	.sb_pool_get		= nfp_devlink_sb_pool_get,
344 	.sb_pool_set		= nfp_devlink_sb_pool_set,
345 	.eswitch_mode_get	= nfp_devlink_eswitch_mode_get,
346 	.eswitch_mode_set	= nfp_devlink_eswitch_mode_set,
347 	.info_get		= nfp_devlink_info_get,
348 	.flash_update		= nfp_devlink_flash_update,
349 };
350 
351 int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
352 {
353 	struct devlink_port_attrs attrs = {};
354 	struct nfp_eth_table_port eth_port;
355 	struct devlink *devlink;
356 	const u8 *serial;
357 	int serial_len;
358 	int ret;
359 
360 	rtnl_lock();
361 	ret = nfp_devlink_fill_eth_port(port, &eth_port);
362 	rtnl_unlock();
363 	if (ret)
364 		return ret;
365 
366 	attrs.split = eth_port.is_split;
367 	attrs.splittable = !attrs.split;
368 	attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
369 	attrs.phys.port_number = eth_port.label_port;
370 	attrs.phys.split_subport_number = eth_port.label_subport;
371 	serial_len = nfp_cpp_serial(port->app->cpp, &serial);
372 	memcpy(attrs.switch_id.id, serial, serial_len);
373 	attrs.switch_id.id_len = serial_len;
374 	devlink_port_attrs_set(&port->dl_port, &attrs);
375 
376 	devlink = priv_to_devlink(app->pf);
377 
378 	return devlink_port_register(devlink, &port->dl_port, port->eth_id);
379 }
380 
381 void nfp_devlink_port_unregister(struct nfp_port *port)
382 {
383 	devlink_port_unregister(&port->dl_port);
384 }
385 
386 void nfp_devlink_port_type_eth_set(struct nfp_port *port)
387 {
388 	devlink_port_type_eth_set(&port->dl_port, port->netdev);
389 }
390 
391 void nfp_devlink_port_type_clear(struct nfp_port *port)
392 {
393 	devlink_port_type_clear(&port->dl_port);
394 }
395 
396 struct devlink_port *nfp_devlink_get_devlink_port(struct net_device *netdev)
397 {
398 	struct nfp_port *port;
399 
400 	port = nfp_port_from_netdev(netdev);
401 	if (!port)
402 		return NULL;
403 
404 	return &port->dl_port;
405 }
406