1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
3 
4 #include <linux/firmware.h>
5 #include "i40e.h"
6 
7 
8 /**
9  * i40e_ddp_profiles_eq - checks if DDP profiles are the equivalent
10  * @a: new profile info
11  * @b: old profile info
12  *
13  * checks if DDP profiles are the equivalent.
14  * Returns true if profiles are the same.
15  **/
i40e_ddp_profiles_eq(struct i40e_profile_info * a,struct i40e_profile_info * b)16 static bool i40e_ddp_profiles_eq(struct i40e_profile_info *a,
17 				 struct i40e_profile_info *b)
18 {
19 	return a->track_id == b->track_id &&
20 		!memcmp(&a->version, &b->version, sizeof(a->version)) &&
21 		!memcmp(&a->name, &b->name, I40E_DDP_NAME_SIZE);
22 }
23 
24 /**
25  * i40e_ddp_does_profile_exist - checks if DDP profile loaded already
26  * @hw: HW data structure
27  * @pinfo: DDP profile information structure
28  *
29  * checks if DDP profile loaded already.
30  * Returns >0 if the profile exists.
31  * Returns  0 if the profile is absent.
32  * Returns <0 if error.
33  **/
i40e_ddp_does_profile_exist(struct i40e_hw * hw,struct i40e_profile_info * pinfo)34 static int i40e_ddp_does_profile_exist(struct i40e_hw *hw,
35 				       struct i40e_profile_info *pinfo)
36 {
37 	struct i40e_ddp_profile_list *profile_list;
38 	u8 buff[I40E_PROFILE_LIST_SIZE];
39 	int status;
40 	int i;
41 
42 	status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
43 				      NULL);
44 	if (status)
45 		return -1;
46 
47 	profile_list = (struct i40e_ddp_profile_list *)buff;
48 	for (i = 0; i < profile_list->p_count; i++) {
49 		if (i40e_ddp_profiles_eq(pinfo, &profile_list->p_info[i]))
50 			return 1;
51 	}
52 	return 0;
53 }
54 
55 /**
56  * i40e_ddp_profiles_overlap - checks if DDP profiles overlap.
57  * @new: new profile info
58  * @old: old profile info
59  *
60  * checks if DDP profiles overlap.
61  * Returns true if profiles are overlap.
62  **/
i40e_ddp_profiles_overlap(struct i40e_profile_info * new,struct i40e_profile_info * old)63 static bool i40e_ddp_profiles_overlap(struct i40e_profile_info *new,
64 				      struct i40e_profile_info *old)
65 {
66 	unsigned int group_id_old = (u8)((old->track_id & 0x00FF0000) >> 16);
67 	unsigned int group_id_new = (u8)((new->track_id & 0x00FF0000) >> 16);
68 
69 	/* 0x00 group must be only the first */
70 	if (group_id_new == 0)
71 		return true;
72 	/* 0xFF group is compatible with anything else */
73 	if (group_id_new == 0xFF || group_id_old == 0xFF)
74 		return false;
75 	/* otherwise only profiles from the same group are compatible*/
76 	return group_id_old != group_id_new;
77 }
78 
79 /**
80  * i40e_ddp_does_profile_overlap - checks if DDP overlaps with existing one.
81  * @hw: HW data structure
82  * @pinfo: DDP profile information structure
83  *
84  * checks if DDP profile overlaps with existing one.
85  * Returns >0 if the profile overlaps.
86  * Returns  0 if the profile is ok.
87  * Returns <0 if error.
88  **/
i40e_ddp_does_profile_overlap(struct i40e_hw * hw,struct i40e_profile_info * pinfo)89 static int i40e_ddp_does_profile_overlap(struct i40e_hw *hw,
90 					 struct i40e_profile_info *pinfo)
91 {
92 	struct i40e_ddp_profile_list *profile_list;
93 	u8 buff[I40E_PROFILE_LIST_SIZE];
94 	int status;
95 	int i;
96 
97 	status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
98 				      NULL);
99 	if (status)
100 		return -EIO;
101 
102 	profile_list = (struct i40e_ddp_profile_list *)buff;
103 	for (i = 0; i < profile_list->p_count; i++) {
104 		if (i40e_ddp_profiles_overlap(pinfo,
105 					      &profile_list->p_info[i]))
106 			return 1;
107 	}
108 	return 0;
109 }
110 
111 /**
112  * i40e_add_pinfo
113  * @hw: pointer to the hardware structure
114  * @profile: pointer to the profile segment of the package
115  * @profile_info_sec: buffer for information section
116  * @track_id: package tracking id
117  *
118  * Register a profile to the list of loaded profiles.
119  */
120 static int
i40e_add_pinfo(struct i40e_hw * hw,struct i40e_profile_segment * profile,u8 * profile_info_sec,u32 track_id)121 i40e_add_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
122 	       u8 *profile_info_sec, u32 track_id)
123 {
124 	struct i40e_profile_section_header *sec;
125 	struct i40e_profile_info *pinfo;
126 	u32 offset = 0, info = 0;
127 	int status;
128 
129 	sec = (struct i40e_profile_section_header *)profile_info_sec;
130 	sec->tbl_size = 1;
131 	sec->data_end = sizeof(struct i40e_profile_section_header) +
132 			sizeof(struct i40e_profile_info);
133 	sec->section.type = SECTION_TYPE_INFO;
134 	sec->section.offset = sizeof(struct i40e_profile_section_header);
135 	sec->section.size = sizeof(struct i40e_profile_info);
136 	pinfo = (struct i40e_profile_info *)(profile_info_sec +
137 					     sec->section.offset);
138 	pinfo->track_id = track_id;
139 	pinfo->version = profile->version;
140 	pinfo->op = I40E_DDP_ADD_TRACKID;
141 
142 	/* Clear reserved field */
143 	memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
144 	memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);
145 
146 	status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
147 				   track_id, &offset, &info, NULL);
148 	return status;
149 }
150 
151 /**
152  * i40e_del_pinfo - delete DDP profile info from NIC
153  * @hw: HW data structure
154  * @profile: DDP profile segment to be deleted
155  * @profile_info_sec: DDP profile section header
156  * @track_id: track ID of the profile for deletion
157  *
158  * Removes DDP profile from the NIC.
159  **/
160 static int
i40e_del_pinfo(struct i40e_hw * hw,struct i40e_profile_segment * profile,u8 * profile_info_sec,u32 track_id)161 i40e_del_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
162 	       u8 *profile_info_sec, u32 track_id)
163 {
164 	struct i40e_profile_section_header *sec;
165 	struct i40e_profile_info *pinfo;
166 	u32 offset = 0, info = 0;
167 	int status;
168 
169 	sec = (struct i40e_profile_section_header *)profile_info_sec;
170 	sec->tbl_size = 1;
171 	sec->data_end = sizeof(struct i40e_profile_section_header) +
172 			sizeof(struct i40e_profile_info);
173 	sec->section.type = SECTION_TYPE_INFO;
174 	sec->section.offset = sizeof(struct i40e_profile_section_header);
175 	sec->section.size = sizeof(struct i40e_profile_info);
176 	pinfo = (struct i40e_profile_info *)(profile_info_sec +
177 					     sec->section.offset);
178 	pinfo->track_id = track_id;
179 	pinfo->version = profile->version;
180 	pinfo->op = I40E_DDP_REMOVE_TRACKID;
181 
182 	/* Clear reserved field */
183 	memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
184 	memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);
185 
186 	status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
187 				   track_id, &offset, &info, NULL);
188 	return status;
189 }
190 
191 /**
192  * i40e_ddp_is_pkg_hdr_valid - performs basic pkg header integrity checks
193  * @netdev: net device structure (for logging purposes)
194  * @pkg_hdr: pointer to package header
195  * @size_huge: size of the whole DDP profile package in size_t
196  *
197  * Checks correctness of pkg header: Version, size too big/small, and
198  * all segment offsets alignment and boundaries. This function lets
199  * reject non DDP profile file to be loaded by administrator mistake.
200  **/
i40e_ddp_is_pkg_hdr_valid(struct net_device * netdev,struct i40e_package_header * pkg_hdr,size_t size_huge)201 static bool i40e_ddp_is_pkg_hdr_valid(struct net_device *netdev,
202 				      struct i40e_package_header *pkg_hdr,
203 				      size_t size_huge)
204 {
205 	u32 size = 0xFFFFFFFFU & size_huge;
206 	u32 pkg_hdr_size;
207 	u32 segment;
208 
209 	if (!pkg_hdr)
210 		return false;
211 
212 	if (pkg_hdr->version.major > 0) {
213 		struct i40e_ddp_version ver = pkg_hdr->version;
214 
215 		netdev_err(netdev, "Unsupported DDP profile version %u.%u.%u.%u",
216 			   ver.major, ver.minor, ver.update, ver.draft);
217 		return false;
218 	}
219 	if (size_huge > size) {
220 		netdev_err(netdev, "Invalid DDP profile - size is bigger than 4G");
221 		return false;
222 	}
223 	if (size < (sizeof(struct i40e_package_header) + sizeof(u32) +
224 		sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
225 		netdev_err(netdev, "Invalid DDP profile - size is too small.");
226 		return false;
227 	}
228 
229 	pkg_hdr_size = sizeof(u32) * (pkg_hdr->segment_count + 2U);
230 	if (size < pkg_hdr_size) {
231 		netdev_err(netdev, "Invalid DDP profile - too many segments");
232 		return false;
233 	}
234 	for (segment = 0; segment < pkg_hdr->segment_count; ++segment) {
235 		u32 offset = pkg_hdr->segment_offset[segment];
236 
237 		if (0xFU & offset) {
238 			netdev_err(netdev,
239 				   "Invalid DDP profile %u segment alignment",
240 				   segment);
241 			return false;
242 		}
243 		if (pkg_hdr_size > offset || offset >= size) {
244 			netdev_err(netdev,
245 				   "Invalid DDP profile %u segment offset",
246 				   segment);
247 			return false;
248 		}
249 	}
250 
251 	return true;
252 }
253 
254 /**
255  * i40e_ddp_load - performs DDP loading
256  * @netdev: net device structure
257  * @data: buffer containing recipe file
258  * @size: size of the buffer
259  * @is_add: true when loading profile, false when rolling back the previous one
260  *
261  * Checks correctness and loads DDP profile to the NIC. The function is
262  * also used for rolling back previously loaded profile.
263  **/
i40e_ddp_load(struct net_device * netdev,const u8 * data,size_t size,bool is_add)264 int i40e_ddp_load(struct net_device *netdev, const u8 *data, size_t size,
265 		  bool is_add)
266 {
267 	u8 profile_info_sec[sizeof(struct i40e_profile_section_header) +
268 			    sizeof(struct i40e_profile_info)];
269 	struct i40e_metadata_segment *metadata_hdr;
270 	struct i40e_profile_segment *profile_hdr;
271 	struct i40e_profile_info pinfo;
272 	struct i40e_package_header *pkg_hdr;
273 	struct i40e_netdev_priv *np = netdev_priv(netdev);
274 	struct i40e_vsi *vsi = np->vsi;
275 	struct i40e_pf *pf = vsi->back;
276 	u32 track_id;
277 	int istatus;
278 	int status;
279 
280 	pkg_hdr = (struct i40e_package_header *)data;
281 	if (!i40e_ddp_is_pkg_hdr_valid(netdev, pkg_hdr, size))
282 		return -EINVAL;
283 
284 	if (size < (sizeof(struct i40e_package_header) + sizeof(u32) +
285 		    sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
286 		netdev_err(netdev, "Invalid DDP recipe size.");
287 		return -EINVAL;
288 	}
289 
290 	/* Find beginning of segment data in buffer */
291 	metadata_hdr = (struct i40e_metadata_segment *)
292 		i40e_find_segment_in_package(SEGMENT_TYPE_METADATA, pkg_hdr);
293 	if (!metadata_hdr) {
294 		netdev_err(netdev, "Failed to find metadata segment in DDP recipe.");
295 		return -EINVAL;
296 	}
297 
298 	track_id = metadata_hdr->track_id;
299 	profile_hdr = (struct i40e_profile_segment *)
300 		i40e_find_segment_in_package(SEGMENT_TYPE_I40E, pkg_hdr);
301 	if (!profile_hdr) {
302 		netdev_err(netdev, "Failed to find profile segment in DDP recipe.");
303 		return -EINVAL;
304 	}
305 
306 	pinfo.track_id = track_id;
307 	pinfo.version = profile_hdr->version;
308 	if (is_add)
309 		pinfo.op = I40E_DDP_ADD_TRACKID;
310 	else
311 		pinfo.op = I40E_DDP_REMOVE_TRACKID;
312 
313 	memcpy(pinfo.name, profile_hdr->name, I40E_DDP_NAME_SIZE);
314 
315 	/* Check if profile data already exists*/
316 	istatus = i40e_ddp_does_profile_exist(&pf->hw, &pinfo);
317 	if (istatus < 0) {
318 		netdev_err(netdev, "Failed to fetch loaded profiles.");
319 		return istatus;
320 	}
321 	if (is_add) {
322 		if (istatus > 0) {
323 			netdev_err(netdev, "DDP profile already loaded.");
324 			return -EINVAL;
325 		}
326 		istatus = i40e_ddp_does_profile_overlap(&pf->hw, &pinfo);
327 		if (istatus < 0) {
328 			netdev_err(netdev, "Failed to fetch loaded profiles.");
329 			return istatus;
330 		}
331 		if (istatus > 0) {
332 			netdev_err(netdev, "DDP profile overlaps with existing one.");
333 			return -EINVAL;
334 		}
335 	} else {
336 		if (istatus == 0) {
337 			netdev_err(netdev,
338 				   "DDP profile for deletion does not exist.");
339 			return -EINVAL;
340 		}
341 	}
342 
343 	/* Load profile data */
344 	if (is_add) {
345 		status = i40e_write_profile(&pf->hw, profile_hdr, track_id);
346 		if (status) {
347 			if (status == -ENODEV) {
348 				netdev_err(netdev,
349 					   "Profile is not supported by the device.");
350 				return -EPERM;
351 			}
352 			netdev_err(netdev, "Failed to write DDP profile.");
353 			return -EIO;
354 		}
355 	} else {
356 		status = i40e_rollback_profile(&pf->hw, profile_hdr, track_id);
357 		if (status) {
358 			netdev_err(netdev, "Failed to remove DDP profile.");
359 			return -EIO;
360 		}
361 	}
362 
363 	/* Add/remove profile to/from profile list in FW */
364 	if (is_add) {
365 		status = i40e_add_pinfo(&pf->hw, profile_hdr, profile_info_sec,
366 					track_id);
367 		if (status) {
368 			netdev_err(netdev, "Failed to add DDP profile info.");
369 			return -EIO;
370 		}
371 	} else {
372 		status = i40e_del_pinfo(&pf->hw, profile_hdr, profile_info_sec,
373 					track_id);
374 		if (status) {
375 			netdev_err(netdev, "Failed to restore DDP profile info.");
376 			return -EIO;
377 		}
378 	}
379 
380 	return 0;
381 }
382 
383 /**
384  * i40e_ddp_restore - restore previously loaded profile and remove from list
385  * @pf: PF data struct
386  *
387  * Restores previously loaded profile stored on the list in driver memory.
388  * After rolling back removes entry from the list.
389  **/
i40e_ddp_restore(struct i40e_pf * pf)390 static int i40e_ddp_restore(struct i40e_pf *pf)
391 {
392 	struct i40e_ddp_old_profile_list *entry;
393 	struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
394 	int status = 0;
395 
396 	if (!list_empty(&pf->ddp_old_prof)) {
397 		entry = list_first_entry(&pf->ddp_old_prof,
398 					 struct i40e_ddp_old_profile_list,
399 					 list);
400 		status = i40e_ddp_load(netdev, entry->old_ddp_buf,
401 				       entry->old_ddp_size, false);
402 		list_del(&entry->list);
403 		kfree(entry);
404 	}
405 	return status;
406 }
407 
408 /**
409  * i40e_ddp_flash - callback function for ethtool flash feature
410  * @netdev: net device structure
411  * @flash: kernel flash structure
412  *
413  * Ethtool callback function used for loading and unloading DDP profiles.
414  **/
i40e_ddp_flash(struct net_device * netdev,struct ethtool_flash * flash)415 int i40e_ddp_flash(struct net_device *netdev, struct ethtool_flash *flash)
416 {
417 	const struct firmware *ddp_config;
418 	struct i40e_netdev_priv *np = netdev_priv(netdev);
419 	struct i40e_vsi *vsi = np->vsi;
420 	struct i40e_pf *pf = vsi->back;
421 	int status = 0;
422 
423 	/* Check for valid region first */
424 	if (flash->region != I40_DDP_FLASH_REGION) {
425 		netdev_err(netdev, "Requested firmware region is not recognized by this driver.");
426 		return -EINVAL;
427 	}
428 	if (pf->hw.bus.func != 0) {
429 		netdev_err(netdev, "Any DDP operation is allowed only on Phy0 NIC interface");
430 		return -EINVAL;
431 	}
432 
433 	/* If the user supplied "-" instead of file name rollback previously
434 	 * stored profile.
435 	 */
436 	if (strncmp(flash->data, "-", 2) != 0) {
437 		struct i40e_ddp_old_profile_list *list_entry;
438 		char profile_name[sizeof(I40E_DDP_PROFILE_PATH)
439 				  + I40E_DDP_PROFILE_NAME_MAX];
440 
441 		profile_name[sizeof(profile_name) - 1] = 0;
442 		strncpy(profile_name, I40E_DDP_PROFILE_PATH,
443 			sizeof(profile_name) - 1);
444 		strncat(profile_name, flash->data, I40E_DDP_PROFILE_NAME_MAX);
445 		/* Load DDP recipe. */
446 		status = request_firmware(&ddp_config, profile_name,
447 					  &netdev->dev);
448 		if (status) {
449 			netdev_err(netdev, "DDP recipe file request failed.");
450 			return status;
451 		}
452 
453 		status = i40e_ddp_load(netdev, ddp_config->data,
454 				       ddp_config->size, true);
455 
456 		if (!status) {
457 			list_entry =
458 			  kzalloc(sizeof(struct i40e_ddp_old_profile_list) +
459 				  ddp_config->size, GFP_KERNEL);
460 			if (!list_entry) {
461 				netdev_info(netdev, "Failed to allocate memory for previous DDP profile data.");
462 				netdev_info(netdev, "New profile loaded but roll-back will be impossible.");
463 			} else {
464 				memcpy(list_entry->old_ddp_buf,
465 				       ddp_config->data, ddp_config->size);
466 				list_entry->old_ddp_size = ddp_config->size;
467 				list_add(&list_entry->list, &pf->ddp_old_prof);
468 			}
469 		}
470 
471 		release_firmware(ddp_config);
472 	} else {
473 		if (!list_empty(&pf->ddp_old_prof)) {
474 			status = i40e_ddp_restore(pf);
475 		} else {
476 			netdev_warn(netdev, "There is no DDP profile to restore.");
477 			status = -ENOENT;
478 		}
479 	}
480 	return status;
481 }
482