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 	if (count < 2)
74 		return -EINVAL;
75 
76 	mutex_lock(&pf->lock);
77 
78 	rtnl_lock();
79 	ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, &eth_port);
80 	rtnl_unlock();
81 	if (ret)
82 		goto out;
83 
84 	if (eth_port.is_split || eth_port.port_lanes % count) {
85 		ret = -EINVAL;
86 		goto out;
87 	}
88 
89 	/* Special case the 100G CXP -> 2x40G split */
90 	lanes = eth_port.port_lanes / count;
91 	if (eth_port.lanes == 10 && count == 2)
92 		lanes = 8 / count;
93 
94 	ret = nfp_devlink_set_lanes(pf, eth_port.index, lanes);
95 out:
96 	mutex_unlock(&pf->lock);
97 
98 	return ret;
99 }
100 
101 static int
102 nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index,
103 			 struct netlink_ext_ack *extack)
104 {
105 	struct nfp_pf *pf = devlink_priv(devlink);
106 	struct nfp_eth_table_port eth_port;
107 	unsigned int lanes;
108 	int ret;
109 
110 	mutex_lock(&pf->lock);
111 
112 	rtnl_lock();
113 	ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, &eth_port);
114 	rtnl_unlock();
115 	if (ret)
116 		goto out;
117 
118 	if (!eth_port.is_split) {
119 		ret = -EINVAL;
120 		goto out;
121 	}
122 
123 	/* Special case the 100G CXP -> 2x40G unsplit */
124 	lanes = eth_port.port_lanes;
125 	if (eth_port.port_lanes == 8)
126 		lanes = 10;
127 
128 	ret = nfp_devlink_set_lanes(pf, eth_port.index, lanes);
129 out:
130 	mutex_unlock(&pf->lock);
131 
132 	return ret;
133 }
134 
135 static int
136 nfp_devlink_sb_pool_get(struct devlink *devlink, unsigned int sb_index,
137 			u16 pool_index, struct devlink_sb_pool_info *pool_info)
138 {
139 	struct nfp_pf *pf = devlink_priv(devlink);
140 
141 	return nfp_shared_buf_pool_get(pf, sb_index, pool_index, pool_info);
142 }
143 
144 static int
145 nfp_devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
146 			u16 pool_index,
147 			u32 size, enum devlink_sb_threshold_type threshold_type,
148 			struct netlink_ext_ack *extack)
149 {
150 	struct nfp_pf *pf = devlink_priv(devlink);
151 
152 	return nfp_shared_buf_pool_set(pf, sb_index, pool_index,
153 				       size, threshold_type);
154 }
155 
156 static int nfp_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
157 {
158 	struct nfp_pf *pf = devlink_priv(devlink);
159 
160 	return nfp_app_eswitch_mode_get(pf->app, mode);
161 }
162 
163 static int nfp_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
164 					struct netlink_ext_ack *extack)
165 {
166 	struct nfp_pf *pf = devlink_priv(devlink);
167 	int ret;
168 
169 	mutex_lock(&pf->lock);
170 	ret = nfp_app_eswitch_mode_set(pf->app, mode);
171 	mutex_unlock(&pf->lock);
172 
173 	return ret;
174 }
175 
176 static const struct nfp_devlink_versions_simple {
177 	const char *key;
178 	const char *hwinfo;
179 } nfp_devlink_versions_hwinfo[] = {
180 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,	"assembly.partno", },
181 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_REV,	"assembly.revision", },
182 	{ DEVLINK_INFO_VERSION_GENERIC_BOARD_MANUFACTURE, "assembly.vendor", },
183 	{ "board.model", /* code name */		"assembly.model", },
184 };
185 
186 static int
187 nfp_devlink_versions_get_hwinfo(struct nfp_pf *pf, struct devlink_info_req *req)
188 {
189 	unsigned int i;
190 	int err;
191 
192 	for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_hwinfo); i++) {
193 		const struct nfp_devlink_versions_simple *info;
194 		const char *val;
195 
196 		info = &nfp_devlink_versions_hwinfo[i];
197 
198 		val = nfp_hwinfo_lookup(pf->hwinfo, info->hwinfo);
199 		if (!val)
200 			continue;
201 
202 		err = devlink_info_version_fixed_put(req, info->key, val);
203 		if (err)
204 			return err;
205 	}
206 
207 	return 0;
208 }
209 
210 static const struct nfp_devlink_versions {
211 	enum nfp_nsp_versions id;
212 	const char *key;
213 } nfp_devlink_versions_nsp[] = {
214 	{ NFP_VERSIONS_BUNDLE,	"fw.bundle_id", },
215 	{ NFP_VERSIONS_BSP,	DEVLINK_INFO_VERSION_GENERIC_FW_MGMT, },
216 	{ NFP_VERSIONS_CPLD,	"fw.cpld", },
217 	{ NFP_VERSIONS_APP,	DEVLINK_INFO_VERSION_GENERIC_FW_APP, },
218 	{ NFP_VERSIONS_UNDI,	DEVLINK_INFO_VERSION_GENERIC_FW_UNDI, },
219 	{ NFP_VERSIONS_NCSI,	DEVLINK_INFO_VERSION_GENERIC_FW_NCSI, },
220 	{ NFP_VERSIONS_CFGR,	"chip.init", },
221 };
222 
223 static int
224 nfp_devlink_versions_get_nsp(struct devlink_info_req *req, bool flash,
225 			     const u8 *buf, unsigned int size)
226 {
227 	unsigned int i;
228 	int err;
229 
230 	for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_nsp); i++) {
231 		const struct nfp_devlink_versions *info;
232 		const char *version;
233 
234 		info = &nfp_devlink_versions_nsp[i];
235 
236 		version = nfp_nsp_versions_get(info->id, flash, buf, size);
237 		if (IS_ERR(version)) {
238 			if (PTR_ERR(version) == -ENOENT)
239 				continue;
240 			else
241 				return PTR_ERR(version);
242 		}
243 
244 		if (flash)
245 			err = devlink_info_version_stored_put(req, info->key,
246 							      version);
247 		else
248 			err = devlink_info_version_running_put(req, info->key,
249 							       version);
250 		if (err)
251 			return err;
252 	}
253 
254 	return 0;
255 }
256 
257 static int
258 nfp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
259 		     struct netlink_ext_ack *extack)
260 {
261 	struct nfp_pf *pf = devlink_priv(devlink);
262 	const char *sn, *vendor, *part;
263 	struct nfp_nsp *nsp;
264 	char *buf = NULL;
265 	int err;
266 
267 	err = devlink_info_driver_name_put(req, "nfp");
268 	if (err)
269 		return err;
270 
271 	vendor = nfp_hwinfo_lookup(pf->hwinfo, "assembly.vendor");
272 	part = nfp_hwinfo_lookup(pf->hwinfo, "assembly.partno");
273 	sn = nfp_hwinfo_lookup(pf->hwinfo, "assembly.serial");
274 	if (vendor && part && sn) {
275 		char *buf;
276 
277 		buf = kmalloc(strlen(vendor) + strlen(part) + strlen(sn) + 1,
278 			      GFP_KERNEL);
279 		if (!buf)
280 			return -ENOMEM;
281 
282 		buf[0] = '\0';
283 		strcat(buf, vendor);
284 		strcat(buf, part);
285 		strcat(buf, sn);
286 
287 		err = devlink_info_serial_number_put(req, buf);
288 		kfree(buf);
289 		if (err)
290 			return err;
291 	}
292 
293 	nsp = nfp_nsp_open(pf->cpp);
294 	if (IS_ERR(nsp)) {
295 		NL_SET_ERR_MSG_MOD(extack, "can't access NSP");
296 		return PTR_ERR(nsp);
297 	}
298 
299 	if (nfp_nsp_has_versions(nsp)) {
300 		buf = kzalloc(NFP_NSP_VERSION_BUFSZ, GFP_KERNEL);
301 		if (!buf) {
302 			err = -ENOMEM;
303 			goto err_close_nsp;
304 		}
305 
306 		err = nfp_nsp_versions(nsp, buf, NFP_NSP_VERSION_BUFSZ);
307 		if (err)
308 			goto err_free_buf;
309 
310 		err = nfp_devlink_versions_get_nsp(req, false,
311 						   buf, NFP_NSP_VERSION_BUFSZ);
312 		if (err)
313 			goto err_free_buf;
314 
315 		err = nfp_devlink_versions_get_nsp(req, true,
316 						   buf, NFP_NSP_VERSION_BUFSZ);
317 		if (err)
318 			goto err_free_buf;
319 
320 		kfree(buf);
321 	}
322 
323 	nfp_nsp_close(nsp);
324 
325 	return nfp_devlink_versions_get_hwinfo(pf, req);
326 
327 err_free_buf:
328 	kfree(buf);
329 err_close_nsp:
330 	nfp_nsp_close(nsp);
331 	return err;
332 }
333 
334 static int
335 nfp_devlink_flash_update(struct devlink *devlink, const char *path,
336 			 const char *component, struct netlink_ext_ack *extack)
337 {
338 	if (component)
339 		return -EOPNOTSUPP;
340 	return nfp_flash_update_common(devlink_priv(devlink), path, extack);
341 }
342 
343 const struct devlink_ops nfp_devlink_ops = {
344 	.port_split		= nfp_devlink_port_split,
345 	.port_unsplit		= nfp_devlink_port_unsplit,
346 	.sb_pool_get		= nfp_devlink_sb_pool_get,
347 	.sb_pool_set		= nfp_devlink_sb_pool_set,
348 	.eswitch_mode_get	= nfp_devlink_eswitch_mode_get,
349 	.eswitch_mode_set	= nfp_devlink_eswitch_mode_set,
350 	.info_get		= nfp_devlink_info_get,
351 	.flash_update		= nfp_devlink_flash_update,
352 };
353 
354 int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
355 {
356 	struct nfp_eth_table_port eth_port;
357 	struct devlink *devlink;
358 	const u8 *serial;
359 	int serial_len;
360 	int ret;
361 
362 	rtnl_lock();
363 	ret = nfp_devlink_fill_eth_port(port, &eth_port);
364 	rtnl_unlock();
365 	if (ret)
366 		return ret;
367 
368 	serial_len = nfp_cpp_serial(port->app->cpp, &serial);
369 	devlink_port_attrs_set(&port->dl_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
370 			       eth_port.label_port, eth_port.is_split,
371 			       eth_port.label_subport, serial, serial_len);
372 
373 	devlink = priv_to_devlink(app->pf);
374 
375 	return devlink_port_register(devlink, &port->dl_port, port->eth_id);
376 }
377 
378 void nfp_devlink_port_unregister(struct nfp_port *port)
379 {
380 	devlink_port_unregister(&port->dl_port);
381 }
382 
383 void nfp_devlink_port_type_eth_set(struct nfp_port *port)
384 {
385 	devlink_port_type_eth_set(&port->dl_port, port->netdev);
386 }
387 
388 void nfp_devlink_port_type_clear(struct nfp_port *port)
389 {
390 	devlink_port_type_clear(&port->dl_port);
391 }
392 
393 struct devlink_port *nfp_devlink_get_devlink_port(struct net_device *netdev)
394 {
395 	struct nfp_port *port;
396 
397 	port = nfp_port_from_netdev(netdev);
398 	if (!port)
399 		return NULL;
400 
401 	return &port->dl_port;
402 }
403