1 /*
2  * Copyright 2019 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  */
22 #include "priv.h"
23 
24 #include <core/firmware.h>
25 #include <core/memory.h>
26 #include <subdev/mmu.h>
27 
28 static struct nvkm_acr_hsf *
29 nvkm_acr_hsf_find(struct nvkm_acr *acr, const char *name)
30 {
31 	struct nvkm_acr_hsf *hsf;
32 	list_for_each_entry(hsf, &acr->hsf, head) {
33 		if (!strcmp(hsf->name, name))
34 			return hsf;
35 	}
36 	return NULL;
37 }
38 
39 int
40 nvkm_acr_hsf_boot(struct nvkm_acr *acr, const char *name)
41 {
42 	struct nvkm_subdev *subdev = &acr->subdev;
43 	struct nvkm_acr_hsf *hsf;
44 	int ret;
45 
46 	hsf = nvkm_acr_hsf_find(acr, name);
47 	if (!hsf)
48 		return -EINVAL;
49 
50 	nvkm_debug(subdev, "executing %s binary\n", hsf->name);
51 	ret = nvkm_falcon_get(hsf->falcon, subdev);
52 	if (ret)
53 		return ret;
54 
55 	ret = hsf->func->boot(acr, hsf);
56 	nvkm_falcon_put(hsf->falcon, subdev);
57 	if (ret) {
58 		nvkm_error(subdev, "%s binary failed\n", hsf->name);
59 		return ret;
60 	}
61 
62 	nvkm_debug(subdev, "%s binary completed successfully\n", hsf->name);
63 	return 0;
64 }
65 
66 static void
67 nvkm_acr_unload(struct nvkm_acr *acr)
68 {
69 	if (acr->done) {
70 		nvkm_acr_hsf_boot(acr, "unload");
71 		acr->done = false;
72 	}
73 }
74 
75 static int
76 nvkm_acr_load(struct nvkm_acr *acr)
77 {
78 	struct nvkm_subdev *subdev = &acr->subdev;
79 	struct nvkm_acr_lsf *lsf;
80 	u64 start, limit;
81 	int ret;
82 
83 	if (list_empty(&acr->lsf)) {
84 		nvkm_debug(subdev, "No LSF(s) present.\n");
85 		return 0;
86 	}
87 
88 	ret = acr->func->init(acr);
89 	if (ret)
90 		return ret;
91 
92 	acr->func->wpr_check(acr, &start, &limit);
93 
94 	if (start != acr->wpr_start || limit != acr->wpr_end) {
95 		nvkm_error(subdev, "WPR not configured as expected: "
96 				   "%016llx-%016llx vs %016llx-%016llx\n",
97 			   acr->wpr_start, acr->wpr_end, start, limit);
98 		return -EIO;
99 	}
100 
101 	acr->done = true;
102 
103 	list_for_each_entry(lsf, &acr->lsf, head) {
104 		if (lsf->func->boot) {
105 			ret = lsf->func->boot(lsf->falcon);
106 			if (ret)
107 				break;
108 		}
109 	}
110 
111 	return ret;
112 }
113 
114 static int
115 nvkm_acr_reload(struct nvkm_acr *acr)
116 {
117 	nvkm_acr_unload(acr);
118 	return nvkm_acr_load(acr);
119 }
120 
121 static struct nvkm_acr_lsf *
122 nvkm_acr_falcon(struct nvkm_device *device)
123 {
124 	struct nvkm_acr *acr = device->acr;
125 	struct nvkm_acr_lsf *lsf;
126 
127 	if (acr) {
128 		list_for_each_entry(lsf, &acr->lsf, head) {
129 			if (lsf->func->bootstrap_falcon)
130 				return lsf;
131 		}
132 	}
133 
134 	return NULL;
135 }
136 
137 int
138 nvkm_acr_bootstrap_falcons(struct nvkm_device *device, unsigned long mask)
139 {
140 	struct nvkm_acr_lsf *acrflcn = nvkm_acr_falcon(device);
141 	struct nvkm_acr *acr = device->acr;
142 	unsigned long id;
143 
144 	/* If there's no LS FW managing bootstrapping of other LS falcons,
145 	 * we depend on the HS firmware being able to do it instead.
146 	 */
147 	if (!acrflcn) {
148 		/* Which isn't possible everywhere... */
149 		if ((mask & acr->func->bootstrap_falcons) == mask) {
150 			int ret = nvkm_acr_reload(acr);
151 			if (ret)
152 				return ret;
153 
154 			return acr->done ? 0 : -EINVAL;
155 		}
156 		return -ENOSYS;
157 	}
158 
159 	if ((mask & acrflcn->func->bootstrap_falcons) != mask)
160 		return -ENOSYS;
161 
162 	if (acrflcn->func->bootstrap_multiple_falcons) {
163 		return acrflcn->func->
164 			bootstrap_multiple_falcons(acrflcn->falcon, mask);
165 	}
166 
167 	for_each_set_bit(id, &mask, NVKM_ACR_LSF_NUM) {
168 		int ret = acrflcn->func->bootstrap_falcon(acrflcn->falcon, id);
169 		if (ret)
170 			return ret;
171 	}
172 
173 	return 0;
174 }
175 
176 bool
177 nvkm_acr_managed_falcon(struct nvkm_device *device, enum nvkm_acr_lsf_id id)
178 {
179 	struct nvkm_acr *acr = device->acr;
180 
181 	if (acr) {
182 		if (acr->managed_falcons & BIT_ULL(id))
183 			return true;
184 	}
185 
186 	return false;
187 }
188 
189 static int
190 nvkm_acr_fini(struct nvkm_subdev *subdev, bool suspend)
191 {
192 	nvkm_acr_unload(nvkm_acr(subdev));
193 	return 0;
194 }
195 
196 static int
197 nvkm_acr_init(struct nvkm_subdev *subdev)
198 {
199 	if (!nvkm_acr_falcon(subdev->device))
200 		return 0;
201 
202 	return nvkm_acr_load(nvkm_acr(subdev));
203 }
204 
205 static void
206 nvkm_acr_cleanup(struct nvkm_acr *acr)
207 {
208 	nvkm_acr_lsfw_del_all(acr);
209 	nvkm_acr_hsfw_del_all(acr);
210 	nvkm_firmware_put(acr->wpr_fw);
211 	acr->wpr_fw = NULL;
212 }
213 
214 static int
215 nvkm_acr_oneinit(struct nvkm_subdev *subdev)
216 {
217 	struct nvkm_device *device = subdev->device;
218 	struct nvkm_acr *acr = nvkm_acr(subdev);
219 	struct nvkm_acr_hsfw *hsfw;
220 	struct nvkm_acr_lsfw *lsfw, *lsft;
221 	struct nvkm_acr_lsf *lsf;
222 	u32 wpr_size = 0;
223 	u64 falcons;
224 	int ret, i;
225 
226 	if (list_empty(&acr->hsfw)) {
227 		nvkm_debug(subdev, "No HSFW(s)\n");
228 		nvkm_acr_cleanup(acr);
229 		return 0;
230 	}
231 
232 	/* Determine layout/size of WPR image up-front, as we need to know
233 	 * it to allocate memory before we begin constructing it.
234 	 */
235 	list_for_each_entry_safe(lsfw, lsft, &acr->lsfw, head) {
236 		/* Cull unknown falcons that are present in WPR image. */
237 		if (acr->wpr_fw) {
238 			if (!lsfw->func) {
239 				nvkm_acr_lsfw_del(lsfw);
240 				continue;
241 			}
242 
243 			wpr_size = acr->wpr_fw->size;
244 		}
245 
246 		/* Ensure we've fetched falcon configuration. */
247 		ret = nvkm_falcon_get(lsfw->falcon, subdev);
248 		if (ret)
249 			return ret;
250 
251 		nvkm_falcon_put(lsfw->falcon, subdev);
252 
253 		if (!(lsf = kmalloc(sizeof(*lsf), GFP_KERNEL)))
254 			return -ENOMEM;
255 		lsf->func = lsfw->func;
256 		lsf->falcon = lsfw->falcon;
257 		lsf->id = lsfw->id;
258 		list_add_tail(&lsf->head, &acr->lsf);
259 		acr->managed_falcons |= BIT_ULL(lsf->id);
260 	}
261 
262 	/* Ensure the falcon that'll provide ACR functions is booted first. */
263 	lsf = nvkm_acr_falcon(device);
264 	if (lsf) {
265 		falcons = lsf->func->bootstrap_falcons;
266 		list_move(&lsf->head, &acr->lsf);
267 	} else {
268 		falcons = acr->func->bootstrap_falcons;
269 	}
270 
271 	/* Cull falcons that can't be bootstrapped, or the HSFW can fail to
272 	 * boot and leave the GPU in a weird state.
273 	 */
274 	list_for_each_entry_safe(lsfw, lsft, &acr->lsfw, head) {
275 		if (!(falcons & BIT_ULL(lsfw->id))) {
276 			nvkm_warn(subdev, "%s falcon cannot be bootstrapped\n",
277 				  nvkm_acr_lsf_id(lsfw->id));
278 			nvkm_acr_lsfw_del(lsfw);
279 		}
280 	}
281 
282 	if (!acr->wpr_fw || acr->wpr_comp)
283 		wpr_size = acr->func->wpr_layout(acr);
284 
285 	/* Allocate/Locate WPR + fill ucode blob pointer.
286 	 *
287 	 *  dGPU: allocate WPR + shadow blob
288 	 * Tegra: locate WPR with regs, ensure size is sufficient,
289 	 *        allocate ucode blob.
290 	 */
291 	ret = acr->func->wpr_alloc(acr, wpr_size);
292 	if (ret)
293 		return ret;
294 
295 	nvkm_debug(subdev, "WPR region is from 0x%llx-0x%llx (shadow 0x%llx)\n",
296 		   acr->wpr_start, acr->wpr_end, acr->shadow_start);
297 
298 	/* Write WPR to ucode blob. */
299 	nvkm_kmap(acr->wpr);
300 	if (acr->wpr_fw && !acr->wpr_comp)
301 		nvkm_wobj(acr->wpr, 0, acr->wpr_fw->data, acr->wpr_fw->size);
302 
303 	if (!acr->wpr_fw || acr->wpr_comp)
304 		acr->func->wpr_build(acr, nvkm_acr_falcon(device));
305 	acr->func->wpr_patch(acr, (s64)acr->wpr_start - acr->wpr_prev);
306 
307 	if (acr->wpr_fw && acr->wpr_comp) {
308 		nvkm_kmap(acr->wpr);
309 		for (i = 0; i < acr->wpr_fw->size; i += 4) {
310 			u32 us = nvkm_ro32(acr->wpr, i);
311 			u32 fw = ((u32 *)acr->wpr_fw->data)[i/4];
312 			if (fw != us) {
313 				nvkm_warn(subdev, "%08x: %08x %08x\n",
314 					  i, us, fw);
315 			}
316 		}
317 		return -EINVAL;
318 	}
319 	nvkm_done(acr->wpr);
320 
321 	/* Allocate instance block for ACR-related stuff. */
322 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, 0x1000, 0, true,
323 			      &acr->inst);
324 	if (ret)
325 		return ret;
326 
327 	ret = nvkm_vmm_new(device, 0, 0, NULL, 0, NULL, "acr", &acr->vmm);
328 	if (ret)
329 		return ret;
330 
331 	acr->vmm->debug = acr->subdev.debug;
332 
333 	ret = nvkm_vmm_join(acr->vmm, acr->inst);
334 	if (ret)
335 		return ret;
336 
337 	/* Load HS firmware blobs into ACR VMM. */
338 	list_for_each_entry(hsfw, &acr->hsfw, head) {
339 		nvkm_debug(subdev, "loading %s fw\n", hsfw->name);
340 		ret = hsfw->func->load(acr, hsfw);
341 		if (ret)
342 			return ret;
343 	}
344 
345 	/* Kill temporary data. */
346 	nvkm_acr_cleanup(acr);
347 	return 0;
348 }
349 
350 static void *
351 nvkm_acr_dtor(struct nvkm_subdev *subdev)
352 {
353 	struct nvkm_acr *acr = nvkm_acr(subdev);
354 	struct nvkm_acr_hsf *hsf, *hst;
355 	struct nvkm_acr_lsf *lsf, *lst;
356 
357 	list_for_each_entry_safe(hsf, hst, &acr->hsf, head) {
358 		nvkm_vmm_put(acr->vmm, &hsf->vma);
359 		nvkm_memory_unref(&hsf->ucode);
360 		kfree(hsf->imem);
361 		list_del(&hsf->head);
362 		kfree(hsf);
363 	}
364 
365 	nvkm_vmm_part(acr->vmm, acr->inst);
366 	nvkm_vmm_unref(&acr->vmm);
367 	nvkm_memory_unref(&acr->inst);
368 
369 	nvkm_memory_unref(&acr->wpr);
370 
371 	list_for_each_entry_safe(lsf, lst, &acr->lsf, head) {
372 		list_del(&lsf->head);
373 		kfree(lsf);
374 	}
375 
376 	nvkm_acr_cleanup(acr);
377 	return acr;
378 }
379 
380 static const struct nvkm_subdev_func
381 nvkm_acr = {
382 	.dtor = nvkm_acr_dtor,
383 	.oneinit = nvkm_acr_oneinit,
384 	.init = nvkm_acr_init,
385 	.fini = nvkm_acr_fini,
386 };
387 
388 static int
389 nvkm_acr_ctor_wpr(struct nvkm_acr *acr, int ver)
390 {
391 	struct nvkm_subdev *subdev = &acr->subdev;
392 	struct nvkm_device *device = subdev->device;
393 	int ret;
394 
395 	ret = nvkm_firmware_get(subdev, "acr/wpr", ver, &acr->wpr_fw);
396 	if (ret < 0)
397 		return ret;
398 
399 	/* Pre-add LSFs in the order they appear in the FW WPR image so that
400 	 * we're able to do a binary comparison with our own generator.
401 	 */
402 	ret = acr->func->wpr_parse(acr);
403 	if (ret)
404 		return ret;
405 
406 	acr->wpr_comp = nvkm_boolopt(device->cfgopt, "NvAcrWprCompare", false);
407 	acr->wpr_prev = nvkm_longopt(device->cfgopt, "NvAcrWprPrevAddr", 0);
408 	return 0;
409 }
410 
411 int
412 nvkm_acr_new_(const struct nvkm_acr_fwif *fwif, struct nvkm_device *device,
413 	      enum nvkm_subdev_type type, int inst, struct nvkm_acr **pacr)
414 {
415 	struct nvkm_acr *acr;
416 	long wprfw;
417 
418 	if (!(acr = *pacr = kzalloc(sizeof(*acr), GFP_KERNEL)))
419 		return -ENOMEM;
420 	nvkm_subdev_ctor(&nvkm_acr, device, type, inst, &acr->subdev);
421 	INIT_LIST_HEAD(&acr->hsfw);
422 	INIT_LIST_HEAD(&acr->lsfw);
423 	INIT_LIST_HEAD(&acr->hsf);
424 	INIT_LIST_HEAD(&acr->lsf);
425 
426 	fwif = nvkm_firmware_load(&acr->subdev, fwif, "Acr", acr);
427 	if (IS_ERR(fwif))
428 		return PTR_ERR(fwif);
429 
430 	acr->func = fwif->func;
431 
432 	wprfw = nvkm_longopt(device->cfgopt, "NvAcrWpr", -1);
433 	if (wprfw >= 0) {
434 		int ret = nvkm_acr_ctor_wpr(acr, wprfw);
435 		if (ret)
436 			return ret;
437 	}
438 
439 	return 0;
440 }
441