Commit | Line | Data |
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400e64df OBC |
1 | /* |
2 | * Remote Processor Framework | |
3 | * | |
4 | * Copyright (C) 2011 Texas Instruments, Inc. | |
5 | * Copyright (C) 2011 Google, Inc. | |
6 | * | |
7 | * Ohad Ben-Cohen <ohad@wizery.com> | |
8 | * Brian Swetland <swetland@google.com> | |
9 | * Mark Grosen <mgrosen@ti.com> | |
10 | * Fernando Guzman Lugo <fernando.lugo@ti.com> | |
11 | * Suman Anna <s-anna@ti.com> | |
12 | * Robert Tivy <rtivy@ti.com> | |
13 | * Armando Uribe De Leon <x0095078@ti.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * version 2 as published by the Free Software Foundation. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | */ | |
24 | ||
25 | #define pr_fmt(fmt) "%s: " fmt, __func__ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/device.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/mutex.h> | |
32 | #include <linux/dma-mapping.h> | |
33 | #include <linux/firmware.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/debugfs.h> | |
2666ca91 | 36 | #include <linux/devcoredump.h> |
400e64df OBC |
37 | #include <linux/remoteproc.h> |
38 | #include <linux/iommu.h> | |
b5ab5e24 | 39 | #include <linux/idr.h> |
400e64df | 40 | #include <linux/elf.h> |
a2b950ac | 41 | #include <linux/crc32.h> |
400e64df OBC |
42 | #include <linux/virtio_ids.h> |
43 | #include <linux/virtio_ring.h> | |
cf59d3e9 | 44 | #include <asm/byteorder.h> |
400e64df OBC |
45 | |
46 | #include "remoteproc_internal.h" | |
47 | ||
fec47d86 DG |
48 | static DEFINE_MUTEX(rproc_list_mutex); |
49 | static LIST_HEAD(rproc_list); | |
50 | ||
400e64df | 51 | typedef int (*rproc_handle_resources_t)(struct rproc *rproc, |
fd2c15ec | 52 | struct resource_table *table, int len); |
a2b950ac OBC |
53 | typedef int (*rproc_handle_resource_t)(struct rproc *rproc, |
54 | void *, int offset, int avail); | |
400e64df | 55 | |
c6aed238 LP |
56 | static int rproc_alloc_carveout(struct rproc *rproc, |
57 | struct rproc_mem_entry *mem); | |
58 | static int rproc_release_carveout(struct rproc *rproc, | |
59 | struct rproc_mem_entry *mem); | |
60 | ||
b5ab5e24 OBC |
61 | /* Unique indices for remoteproc devices */ |
62 | static DEFINE_IDA(rproc_dev_index); | |
63 | ||
8afd519c FGL |
64 | static const char * const rproc_crash_names[] = { |
65 | [RPROC_MMUFAULT] = "mmufault", | |
b3d39032 BA |
66 | [RPROC_WATCHDOG] = "watchdog", |
67 | [RPROC_FATAL_ERROR] = "fatal error", | |
8afd519c FGL |
68 | }; |
69 | ||
70 | /* translate rproc_crash_type to string */ | |
71 | static const char *rproc_crash_to_string(enum rproc_crash_type type) | |
72 | { | |
73 | if (type < ARRAY_SIZE(rproc_crash_names)) | |
74 | return rproc_crash_names[type]; | |
b23f7a09 | 75 | return "unknown"; |
8afd519c FGL |
76 | } |
77 | ||
400e64df OBC |
78 | /* |
79 | * This is the IOMMU fault handler we register with the IOMMU API | |
80 | * (when relevant; not all remote processors access memory through | |
81 | * an IOMMU). | |
82 | * | |
83 | * IOMMU core will invoke this handler whenever the remote processor | |
84 | * will try to access an unmapped device address. | |
400e64df OBC |
85 | */ |
86 | static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev, | |
730f84ce | 87 | unsigned long iova, int flags, void *token) |
400e64df | 88 | { |
8afd519c FGL |
89 | struct rproc *rproc = token; |
90 | ||
400e64df OBC |
91 | dev_err(dev, "iommu fault: da 0x%lx flags 0x%x\n", iova, flags); |
92 | ||
8afd519c FGL |
93 | rproc_report_crash(rproc, RPROC_MMUFAULT); |
94 | ||
400e64df OBC |
95 | /* |
96 | * Let the iommu core know we're not really handling this fault; | |
8afd519c | 97 | * we just used it as a recovery trigger. |
400e64df OBC |
98 | */ |
99 | return -ENOSYS; | |
100 | } | |
101 | ||
102 | static int rproc_enable_iommu(struct rproc *rproc) | |
103 | { | |
104 | struct iommu_domain *domain; | |
b5ab5e24 | 105 | struct device *dev = rproc->dev.parent; |
400e64df OBC |
106 | int ret; |
107 | ||
315491e5 SA |
108 | if (!rproc->has_iommu) { |
109 | dev_dbg(dev, "iommu not present\n"); | |
0798e1da | 110 | return 0; |
400e64df OBC |
111 | } |
112 | ||
113 | domain = iommu_domain_alloc(dev->bus); | |
114 | if (!domain) { | |
115 | dev_err(dev, "can't alloc iommu domain\n"); | |
116 | return -ENOMEM; | |
117 | } | |
118 | ||
77ca2332 | 119 | iommu_set_fault_handler(domain, rproc_iommu_fault, rproc); |
400e64df OBC |
120 | |
121 | ret = iommu_attach_device(domain, dev); | |
122 | if (ret) { | |
123 | dev_err(dev, "can't attach iommu device: %d\n", ret); | |
124 | goto free_domain; | |
125 | } | |
126 | ||
127 | rproc->domain = domain; | |
128 | ||
129 | return 0; | |
130 | ||
131 | free_domain: | |
132 | iommu_domain_free(domain); | |
133 | return ret; | |
134 | } | |
135 | ||
136 | static void rproc_disable_iommu(struct rproc *rproc) | |
137 | { | |
138 | struct iommu_domain *domain = rproc->domain; | |
b5ab5e24 | 139 | struct device *dev = rproc->dev.parent; |
400e64df OBC |
140 | |
141 | if (!domain) | |
142 | return; | |
143 | ||
144 | iommu_detach_device(domain, dev); | |
145 | iommu_domain_free(domain); | |
400e64df OBC |
146 | } |
147 | ||
eb30596e LP |
148 | static phys_addr_t rproc_va_to_pa(void *cpu_addr) |
149 | { | |
150 | /* | |
151 | * Return physical address according to virtual address location | |
152 | * - in vmalloc: if region ioremapped or defined as dma_alloc_coherent | |
153 | * - in kernel: if region allocated in generic dma memory pool | |
154 | */ | |
155 | if (is_vmalloc_addr(cpu_addr)) { | |
156 | return page_to_phys(vmalloc_to_page(cpu_addr)) + | |
157 | offset_in_page(cpu_addr); | |
158 | } | |
159 | ||
160 | WARN_ON(!virt_addr_valid(cpu_addr)); | |
161 | return virt_to_phys(cpu_addr); | |
162 | } | |
163 | ||
a01f7cd6 SA |
164 | /** |
165 | * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address | |
166 | * @rproc: handle of a remote processor | |
167 | * @da: remoteproc device address to translate | |
168 | * @len: length of the memory region @da is pointing to | |
169 | * | |
400e64df OBC |
170 | * Some remote processors will ask us to allocate them physically contiguous |
171 | * memory regions (which we call "carveouts"), and map them to specific | |
a01f7cd6 SA |
172 | * device addresses (which are hardcoded in the firmware). They may also have |
173 | * dedicated memory regions internal to the processors, and use them either | |
174 | * exclusively or alongside carveouts. | |
400e64df OBC |
175 | * |
176 | * They may then ask us to copy objects into specific device addresses (e.g. | |
177 | * code/data sections) or expose us certain symbols in other device address | |
178 | * (e.g. their trace buffer). | |
179 | * | |
a01f7cd6 SA |
180 | * This function is a helper function with which we can go over the allocated |
181 | * carveouts and translate specific device addresses to kernel virtual addresses | |
182 | * so we can access the referenced memory. This function also allows to perform | |
183 | * translations on the internal remoteproc memory regions through a platform | |
184 | * implementation specific da_to_va ops, if present. | |
185 | * | |
186 | * The function returns a valid kernel address on success or NULL on failure. | |
400e64df OBC |
187 | * |
188 | * Note: phys_to_virt(iommu_iova_to_phys(rproc->domain, da)) will work too, | |
189 | * but only on kernel direct mapped RAM memory. Instead, we're just using | |
a01f7cd6 SA |
190 | * here the output of the DMA API for the carveouts, which should be more |
191 | * correct. | |
400e64df | 192 | */ |
72854fb0 | 193 | void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) |
400e64df OBC |
194 | { |
195 | struct rproc_mem_entry *carveout; | |
196 | void *ptr = NULL; | |
197 | ||
a01f7cd6 SA |
198 | if (rproc->ops->da_to_va) { |
199 | ptr = rproc->ops->da_to_va(rproc, da, len); | |
200 | if (ptr) | |
201 | goto out; | |
202 | } | |
203 | ||
400e64df OBC |
204 | list_for_each_entry(carveout, &rproc->carveouts, node) { |
205 | int offset = da - carveout->da; | |
206 | ||
207 | /* try next carveout if da is too small */ | |
208 | if (offset < 0) | |
209 | continue; | |
210 | ||
211 | /* try next carveout if da is too large */ | |
212 | if (offset + len > carveout->len) | |
213 | continue; | |
214 | ||
215 | ptr = carveout->va + offset; | |
216 | ||
217 | break; | |
218 | } | |
219 | ||
a01f7cd6 | 220 | out: |
400e64df OBC |
221 | return ptr; |
222 | } | |
4afc89d6 | 223 | EXPORT_SYMBOL(rproc_da_to_va); |
400e64df | 224 | |
b0019ccd LP |
225 | /** |
226 | * rproc_find_carveout_by_name() - lookup the carveout region by a name | |
227 | * @rproc: handle of a remote processor | |
228 | * @name,..: carveout name to find (standard printf format) | |
229 | * | |
230 | * Platform driver has the capability to register some pre-allacoted carveout | |
231 | * (physically contiguous memory regions) before rproc firmware loading and | |
232 | * associated resource table analysis. These regions may be dedicated memory | |
233 | * regions internal to the coprocessor or specified DDR region with specific | |
234 | * attributes | |
235 | * | |
236 | * This function is a helper function with which we can go over the | |
237 | * allocated carveouts and return associated region characteristics like | |
238 | * coprocessor address, length or processor virtual address. | |
239 | * | |
240 | * Return: a valid pointer on carveout entry on success or NULL on failure. | |
241 | */ | |
242 | struct rproc_mem_entry * | |
243 | rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...) | |
244 | { | |
245 | va_list args; | |
246 | char _name[32]; | |
247 | struct rproc_mem_entry *carveout, *mem = NULL; | |
248 | ||
249 | if (!name) | |
250 | return NULL; | |
251 | ||
252 | va_start(args, name); | |
253 | vsnprintf(_name, sizeof(_name), name, args); | |
254 | va_end(args); | |
255 | ||
256 | list_for_each_entry(carveout, &rproc->carveouts, node) { | |
257 | /* Compare carveout and requested names */ | |
258 | if (!strcmp(carveout->name, _name)) { | |
259 | mem = carveout; | |
260 | break; | |
261 | } | |
262 | } | |
263 | ||
264 | return mem; | |
265 | } | |
266 | ||
c874bf59 LP |
267 | /** |
268 | * rproc_check_carveout_da() - Check specified carveout da configuration | |
269 | * @rproc: handle of a remote processor | |
270 | * @mem: pointer on carveout to check | |
271 | * @da: area device address | |
272 | * @len: associated area size | |
273 | * | |
274 | * This function is a helper function to verify requested device area (couple | |
275 | * da, len) is part of specified carevout. | |
276 | * | |
277 | * Return: 0 if carveout match request else -ENOMEM | |
278 | */ | |
279 | int rproc_check_carveout_da(struct rproc *rproc, struct rproc_mem_entry *mem, | |
280 | u32 da, u32 len) | |
281 | { | |
282 | struct device *dev = &rproc->dev; | |
283 | int delta = 0; | |
284 | ||
285 | /* Check requested resource length */ | |
286 | if (len > mem->len) { | |
287 | dev_err(dev, "Registered carveout doesn't fit len request\n"); | |
288 | return -ENOMEM; | |
289 | } | |
290 | ||
291 | if (da != FW_RSC_ADDR_ANY && mem->da == FW_RSC_ADDR_ANY) { | |
292 | /* Update existing carveout da */ | |
293 | mem->da = da; | |
294 | } else if (da != FW_RSC_ADDR_ANY && mem->da != FW_RSC_ADDR_ANY) { | |
295 | delta = da - mem->da; | |
296 | ||
297 | /* Check requested resource belongs to registered carveout */ | |
298 | if (delta < 0) { | |
299 | dev_err(dev, | |
300 | "Registered carveout doesn't fit da request\n"); | |
301 | return -ENOMEM; | |
302 | } | |
303 | ||
304 | if (delta + len > mem->len) { | |
305 | dev_err(dev, | |
306 | "Registered carveout doesn't fit len request\n"); | |
307 | return -ENOMEM; | |
308 | } | |
309 | } | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
6db20ea8 | 314 | int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) |
400e64df | 315 | { |
7a186941 | 316 | struct rproc *rproc = rvdev->rproc; |
b5ab5e24 | 317 | struct device *dev = &rproc->dev; |
6db20ea8 | 318 | struct rproc_vring *rvring = &rvdev->vring[i]; |
c0d63157 | 319 | struct fw_rsc_vdev *rsc; |
7a186941 | 320 | int ret, size, notifyid; |
c6aed238 | 321 | struct rproc_mem_entry *mem; |
400e64df | 322 | |
7a186941 | 323 | /* actual size of vring (in bytes) */ |
6db20ea8 | 324 | size = PAGE_ALIGN(vring_size(rvring->len, rvring->align)); |
7a186941 | 325 | |
c6aed238 LP |
326 | rsc = (void *)rproc->table_ptr + rvdev->rsc_offset; |
327 | ||
328 | /* Search for pre-registered carveout */ | |
329 | mem = rproc_find_carveout_by_name(rproc, "vdev%dvring%d", rvdev->index, | |
330 | i); | |
331 | if (mem) { | |
332 | if (rproc_check_carveout_da(rproc, mem, rsc->vring[i].da, size)) | |
333 | return -ENOMEM; | |
334 | } else { | |
335 | /* Register carveout in in list */ | |
336 | mem = rproc_mem_entry_init(dev, 0, 0, size, rsc->vring[i].da, | |
337 | rproc_alloc_carveout, | |
338 | rproc_release_carveout, | |
339 | "vdev%dvring%d", | |
340 | rvdev->index, i); | |
341 | if (!mem) { | |
342 | dev_err(dev, "Can't allocate memory entry structure\n"); | |
343 | return -ENOMEM; | |
344 | } | |
345 | ||
346 | rproc_add_carveout(rproc, mem); | |
400e64df OBC |
347 | } |
348 | ||
6db20ea8 OBC |
349 | /* |
350 | * Assign an rproc-wide unique index for this vring | |
351 | * TODO: assign a notifyid for rvdev updates as well | |
6db20ea8 OBC |
352 | * TODO: support predefined notifyids (via resource table) |
353 | */ | |
15fc6110 | 354 | ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL); |
b39599b7 | 355 | if (ret < 0) { |
15fc6110 | 356 | dev_err(dev, "idr_alloc failed: %d\n", ret); |
7a186941 OBC |
357 | return ret; |
358 | } | |
15fc6110 | 359 | notifyid = ret; |
400e64df | 360 | |
48f18f89 BA |
361 | /* Potentially bump max_notifyid */ |
362 | if (notifyid > rproc->max_notifyid) | |
363 | rproc->max_notifyid = notifyid; | |
364 | ||
6db20ea8 | 365 | rvring->notifyid = notifyid; |
400e64df | 366 | |
c6aed238 | 367 | /* Let the rproc know the notifyid of this vring.*/ |
c0d63157 | 368 | rsc->vring[i].notifyid = notifyid; |
400e64df OBC |
369 | return 0; |
370 | } | |
371 | ||
6db20ea8 OBC |
372 | static int |
373 | rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i) | |
7a186941 OBC |
374 | { |
375 | struct rproc *rproc = rvdev->rproc; | |
b5ab5e24 | 376 | struct device *dev = &rproc->dev; |
6db20ea8 OBC |
377 | struct fw_rsc_vdev_vring *vring = &rsc->vring[i]; |
378 | struct rproc_vring *rvring = &rvdev->vring[i]; | |
7a186941 | 379 | |
9d7814a9 | 380 | dev_dbg(dev, "vdev rsc: vring%d: da 0x%x, qsz %d, align %d\n", |
730f84ce | 381 | i, vring->da, vring->num, vring->align); |
7a186941 | 382 | |
6db20ea8 OBC |
383 | /* verify queue size and vring alignment are sane */ |
384 | if (!vring->num || !vring->align) { | |
385 | dev_err(dev, "invalid qsz (%d) or alignment (%d)\n", | |
730f84ce | 386 | vring->num, vring->align); |
6db20ea8 | 387 | return -EINVAL; |
7a186941 | 388 | } |
6db20ea8 OBC |
389 | |
390 | rvring->len = vring->num; | |
391 | rvring->align = vring->align; | |
392 | rvring->rvdev = rvdev; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | void rproc_free_vring(struct rproc_vring *rvring) | |
398 | { | |
6db20ea8 | 399 | struct rproc *rproc = rvring->rvdev->rproc; |
c0d63157 SB |
400 | int idx = rvring->rvdev->vring - rvring; |
401 | struct fw_rsc_vdev *rsc; | |
6db20ea8 | 402 | |
6db20ea8 | 403 | idr_remove(&rproc->notifyids, rvring->notifyid); |
099a3f33 | 404 | |
c0d63157 SB |
405 | /* reset resource entry info */ |
406 | rsc = (void *)rproc->table_ptr + rvring->rvdev->rsc_offset; | |
407 | rsc->vring[idx].da = 0; | |
408 | rsc->vring[idx].notifyid = -1; | |
7a186941 OBC |
409 | } |
410 | ||
6f8b0373 | 411 | static int rproc_vdev_do_start(struct rproc_subdev *subdev) |
f5bcb353 BA |
412 | { |
413 | struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev); | |
414 | ||
415 | return rproc_add_virtio_dev(rvdev, rvdev->id); | |
416 | } | |
417 | ||
6f8b0373 | 418 | static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed) |
f5bcb353 BA |
419 | { |
420 | struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev); | |
421 | ||
422 | rproc_remove_virtio_dev(rvdev); | |
423 | } | |
424 | ||
400e64df | 425 | /** |
fd2c15ec | 426 | * rproc_handle_vdev() - handle a vdev fw resource |
400e64df OBC |
427 | * @rproc: the remote processor |
428 | * @rsc: the vring resource descriptor | |
fd2c15ec | 429 | * @avail: size of available data (for sanity checking the image) |
400e64df | 430 | * |
7a186941 OBC |
431 | * This resource entry requests the host to statically register a virtio |
432 | * device (vdev), and setup everything needed to support it. It contains | |
433 | * everything needed to make it possible: the virtio device id, virtio | |
434 | * device features, vrings information, virtio config space, etc... | |
435 | * | |
436 | * Before registering the vdev, the vrings are allocated from non-cacheable | |
437 | * physically contiguous memory. Currently we only support two vrings per | |
438 | * remote processor (temporary limitation). We might also want to consider | |
439 | * doing the vring allocation only later when ->find_vqs() is invoked, and | |
440 | * then release them upon ->del_vqs(). | |
441 | * | |
442 | * Note: @da is currently not really handled correctly: we dynamically | |
443 | * allocate it using the DMA API, ignoring requested hard coded addresses, | |
444 | * and we don't take care of any required IOMMU programming. This is all | |
445 | * going to be taken care of when the generic iommu-based DMA API will be | |
446 | * merged. Meanwhile, statically-addressed iommu-based firmware images should | |
447 | * use RSC_DEVMEM resource entries to map their required @da to the physical | |
448 | * address of their base CMA region (ouch, hacky!). | |
400e64df OBC |
449 | * |
450 | * Returns 0 on success, or an appropriate error code otherwise | |
451 | */ | |
fd2c15ec | 452 | static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc, |
730f84ce | 453 | int offset, int avail) |
400e64df | 454 | { |
b5ab5e24 | 455 | struct device *dev = &rproc->dev; |
7a186941 OBC |
456 | struct rproc_vdev *rvdev; |
457 | int i, ret; | |
400e64df | 458 | |
fd2c15ec OBC |
459 | /* make sure resource isn't truncated */ |
460 | if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring) | |
461 | + rsc->config_len > avail) { | |
b5ab5e24 | 462 | dev_err(dev, "vdev rsc is truncated\n"); |
400e64df OBC |
463 | return -EINVAL; |
464 | } | |
465 | ||
fd2c15ec OBC |
466 | /* make sure reserved bytes are zeroes */ |
467 | if (rsc->reserved[0] || rsc->reserved[1]) { | |
468 | dev_err(dev, "vdev rsc has non zero reserved bytes\n"); | |
400e64df OBC |
469 | return -EINVAL; |
470 | } | |
471 | ||
9d7814a9 | 472 | dev_dbg(dev, "vdev rsc: id %d, dfeatures 0x%x, cfg len %d, %d vrings\n", |
fd2c15ec OBC |
473 | rsc->id, rsc->dfeatures, rsc->config_len, rsc->num_of_vrings); |
474 | ||
7a186941 OBC |
475 | /* we currently support only two vrings per rvdev */ |
476 | if (rsc->num_of_vrings > ARRAY_SIZE(rvdev->vring)) { | |
fd2c15ec | 477 | dev_err(dev, "too many vrings: %d\n", rsc->num_of_vrings); |
400e64df OBC |
478 | return -EINVAL; |
479 | } | |
480 | ||
899585ad | 481 | rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL); |
7a186941 OBC |
482 | if (!rvdev) |
483 | return -ENOMEM; | |
400e64df | 484 | |
aab8d802 BA |
485 | kref_init(&rvdev->refcount); |
486 | ||
f5bcb353 | 487 | rvdev->id = rsc->id; |
7a186941 | 488 | rvdev->rproc = rproc; |
c6aed238 | 489 | rvdev->index = rproc->nb_vdev++; |
400e64df | 490 | |
6db20ea8 | 491 | /* parse the vrings */ |
7a186941 | 492 | for (i = 0; i < rsc->num_of_vrings; i++) { |
6db20ea8 | 493 | ret = rproc_parse_vring(rvdev, rsc, i); |
7a186941 | 494 | if (ret) |
6db20ea8 | 495 | goto free_rvdev; |
7a186941 | 496 | } |
400e64df | 497 | |
a2b950ac OBC |
498 | /* remember the resource offset*/ |
499 | rvdev->rsc_offset = offset; | |
fd2c15ec | 500 | |
a863af5d BA |
501 | /* allocate the vring resources */ |
502 | for (i = 0; i < rsc->num_of_vrings; i++) { | |
503 | ret = rproc_alloc_vring(rvdev, i); | |
504 | if (ret) | |
505 | goto unwind_vring_allocations; | |
506 | } | |
507 | ||
7a186941 | 508 | list_add_tail(&rvdev->node, &rproc->rvdevs); |
fd2c15ec | 509 | |
6f8b0373 AE |
510 | rvdev->subdev.start = rproc_vdev_do_start; |
511 | rvdev->subdev.stop = rproc_vdev_do_stop; | |
4902676f BA |
512 | |
513 | rproc_add_subdev(rproc, &rvdev->subdev); | |
400e64df OBC |
514 | |
515 | return 0; | |
7a186941 | 516 | |
a863af5d BA |
517 | unwind_vring_allocations: |
518 | for (i--; i >= 0; i--) | |
519 | rproc_free_vring(&rvdev->vring[i]); | |
6db20ea8 | 520 | free_rvdev: |
7a186941 OBC |
521 | kfree(rvdev); |
522 | return ret; | |
400e64df OBC |
523 | } |
524 | ||
aab8d802 BA |
525 | void rproc_vdev_release(struct kref *ref) |
526 | { | |
527 | struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount); | |
a863af5d | 528 | struct rproc_vring *rvring; |
f5bcb353 | 529 | struct rproc *rproc = rvdev->rproc; |
a863af5d BA |
530 | int id; |
531 | ||
532 | for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) { | |
533 | rvring = &rvdev->vring[id]; | |
a863af5d BA |
534 | rproc_free_vring(rvring); |
535 | } | |
aab8d802 | 536 | |
f5bcb353 | 537 | rproc_remove_subdev(rproc, &rvdev->subdev); |
aab8d802 BA |
538 | list_del(&rvdev->node); |
539 | kfree(rvdev); | |
540 | } | |
541 | ||
400e64df OBC |
542 | /** |
543 | * rproc_handle_trace() - handle a shared trace buffer resource | |
544 | * @rproc: the remote processor | |
545 | * @rsc: the trace resource descriptor | |
fd2c15ec | 546 | * @avail: size of available data (for sanity checking the image) |
400e64df OBC |
547 | * |
548 | * In case the remote processor dumps trace logs into memory, | |
549 | * export it via debugfs. | |
550 | * | |
551 | * Currently, the 'da' member of @rsc should contain the device address | |
552 | * where the remote processor is dumping the traces. Later we could also | |
553 | * support dynamically allocating this address using the generic | |
554 | * DMA API (but currently there isn't a use case for that). | |
555 | * | |
556 | * Returns 0 on success, or an appropriate error code otherwise | |
557 | */ | |
fd2c15ec | 558 | static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, |
730f84ce | 559 | int offset, int avail) |
400e64df OBC |
560 | { |
561 | struct rproc_mem_entry *trace; | |
b5ab5e24 | 562 | struct device *dev = &rproc->dev; |
400e64df OBC |
563 | void *ptr; |
564 | char name[15]; | |
565 | ||
fd2c15ec | 566 | if (sizeof(*rsc) > avail) { |
b5ab5e24 | 567 | dev_err(dev, "trace rsc is truncated\n"); |
fd2c15ec OBC |
568 | return -EINVAL; |
569 | } | |
570 | ||
571 | /* make sure reserved bytes are zeroes */ | |
572 | if (rsc->reserved) { | |
573 | dev_err(dev, "trace rsc has non zero reserved bytes\n"); | |
574 | return -EINVAL; | |
575 | } | |
576 | ||
400e64df OBC |
577 | /* what's the kernel address of this resource ? */ |
578 | ptr = rproc_da_to_va(rproc, rsc->da, rsc->len); | |
579 | if (!ptr) { | |
580 | dev_err(dev, "erroneous trace resource entry\n"); | |
581 | return -EINVAL; | |
582 | } | |
583 | ||
584 | trace = kzalloc(sizeof(*trace), GFP_KERNEL); | |
172e6ab1 | 585 | if (!trace) |
400e64df | 586 | return -ENOMEM; |
400e64df OBC |
587 | |
588 | /* set the trace buffer dma properties */ | |
589 | trace->len = rsc->len; | |
590 | trace->va = ptr; | |
591 | ||
592 | /* make sure snprintf always null terminates, even if truncating */ | |
593 | snprintf(name, sizeof(name), "trace%d", rproc->num_traces); | |
594 | ||
595 | /* create the debugfs entry */ | |
596 | trace->priv = rproc_create_trace_file(name, rproc, trace); | |
597 | if (!trace->priv) { | |
598 | trace->va = NULL; | |
599 | kfree(trace); | |
600 | return -EINVAL; | |
601 | } | |
602 | ||
603 | list_add_tail(&trace->node, &rproc->traces); | |
604 | ||
605 | rproc->num_traces++; | |
606 | ||
276ec993 | 607 | dev_dbg(dev, "%s added: va %pK, da 0x%x, len 0x%x\n", |
35386166 | 608 | name, ptr, rsc->da, rsc->len); |
400e64df OBC |
609 | |
610 | return 0; | |
611 | } | |
612 | ||
613 | /** | |
614 | * rproc_handle_devmem() - handle devmem resource entry | |
615 | * @rproc: remote processor handle | |
616 | * @rsc: the devmem resource entry | |
fd2c15ec | 617 | * @avail: size of available data (for sanity checking the image) |
400e64df OBC |
618 | * |
619 | * Remote processors commonly need to access certain on-chip peripherals. | |
620 | * | |
621 | * Some of these remote processors access memory via an iommu device, | |
622 | * and might require us to configure their iommu before they can access | |
623 | * the on-chip peripherals they need. | |
624 | * | |
625 | * This resource entry is a request to map such a peripheral device. | |
626 | * | |
627 | * These devmem entries will contain the physical address of the device in | |
628 | * the 'pa' member. If a specific device address is expected, then 'da' will | |
629 | * contain it (currently this is the only use case supported). 'len' will | |
630 | * contain the size of the physical region we need to map. | |
631 | * | |
632 | * Currently we just "trust" those devmem entries to contain valid physical | |
633 | * addresses, but this is going to change: we want the implementations to | |
634 | * tell us ranges of physical addresses the firmware is allowed to request, | |
635 | * and not allow firmwares to request access to physical addresses that | |
636 | * are outside those ranges. | |
637 | */ | |
fd2c15ec | 638 | static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc, |
730f84ce | 639 | int offset, int avail) |
400e64df OBC |
640 | { |
641 | struct rproc_mem_entry *mapping; | |
b5ab5e24 | 642 | struct device *dev = &rproc->dev; |
400e64df OBC |
643 | int ret; |
644 | ||
645 | /* no point in handling this resource without a valid iommu domain */ | |
646 | if (!rproc->domain) | |
647 | return -EINVAL; | |
648 | ||
fd2c15ec | 649 | if (sizeof(*rsc) > avail) { |
b5ab5e24 | 650 | dev_err(dev, "devmem rsc is truncated\n"); |
fd2c15ec OBC |
651 | return -EINVAL; |
652 | } | |
653 | ||
654 | /* make sure reserved bytes are zeroes */ | |
655 | if (rsc->reserved) { | |
b5ab5e24 | 656 | dev_err(dev, "devmem rsc has non zero reserved bytes\n"); |
fd2c15ec OBC |
657 | return -EINVAL; |
658 | } | |
659 | ||
400e64df | 660 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); |
172e6ab1 | 661 | if (!mapping) |
400e64df | 662 | return -ENOMEM; |
400e64df OBC |
663 | |
664 | ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags); | |
665 | if (ret) { | |
b5ab5e24 | 666 | dev_err(dev, "failed to map devmem: %d\n", ret); |
400e64df OBC |
667 | goto out; |
668 | } | |
669 | ||
670 | /* | |
671 | * We'll need this info later when we'll want to unmap everything | |
672 | * (e.g. on shutdown). | |
673 | * | |
674 | * We can't trust the remote processor not to change the resource | |
675 | * table, so we must maintain this info independently. | |
676 | */ | |
677 | mapping->da = rsc->da; | |
678 | mapping->len = rsc->len; | |
679 | list_add_tail(&mapping->node, &rproc->mappings); | |
680 | ||
b5ab5e24 | 681 | dev_dbg(dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n", |
730f84ce | 682 | rsc->pa, rsc->da, rsc->len); |
400e64df OBC |
683 | |
684 | return 0; | |
685 | ||
686 | out: | |
687 | kfree(mapping); | |
688 | return ret; | |
689 | } | |
690 | ||
f2e74abf | 691 | /** |
d7c51706 | 692 | * rproc_alloc_carveout() - allocated specified carveout |
f2e74abf | 693 | * @rproc: rproc handle |
d7c51706 | 694 | * @mem: the memory entry to allocate |
400e64df | 695 | * |
d7c51706 LP |
696 | * This function allocate specified memory entry @mem using |
697 | * dma_alloc_coherent() as default allocator | |
400e64df | 698 | */ |
d7c51706 LP |
699 | static int rproc_alloc_carveout(struct rproc *rproc, |
700 | struct rproc_mem_entry *mem) | |
400e64df | 701 | { |
d7c51706 | 702 | struct rproc_mem_entry *mapping = NULL; |
b5ab5e24 | 703 | struct device *dev = &rproc->dev; |
400e64df OBC |
704 | dma_addr_t dma; |
705 | void *va; | |
706 | int ret; | |
707 | ||
d7c51706 | 708 | va = dma_alloc_coherent(dev->parent, mem->len, &dma, GFP_KERNEL); |
400e64df | 709 | if (!va) { |
9c219b23 | 710 | dev_err(dev->parent, |
d7c51706 | 711 | "failed to allocate dma memory: len 0x%x\n", mem->len); |
72029c90 | 712 | return -ENOMEM; |
400e64df OBC |
713 | } |
714 | ||
276ec993 | 715 | dev_dbg(dev, "carveout va %pK, dma %pad, len 0x%x\n", |
d7c51706 | 716 | va, &dma, mem->len); |
400e64df OBC |
717 | |
718 | /* | |
719 | * Ok, this is non-standard. | |
720 | * | |
721 | * Sometimes we can't rely on the generic iommu-based DMA API | |
722 | * to dynamically allocate the device address and then set the IOMMU | |
723 | * tables accordingly, because some remote processors might | |
724 | * _require_ us to use hard coded device addresses that their | |
725 | * firmware was compiled with. | |
726 | * | |
727 | * In this case, we must use the IOMMU API directly and map | |
728 | * the memory to the device address as expected by the remote | |
729 | * processor. | |
730 | * | |
731 | * Obviously such remote processor devices should not be configured | |
732 | * to use the iommu-based DMA API: we expect 'dma' to contain the | |
733 | * physical address in this case. | |
734 | */ | |
3bc8140b | 735 | |
d7c51706 LP |
736 | if (mem->da != FW_RSC_ADDR_ANY) { |
737 | if (!rproc->domain) { | |
738 | dev_err(dev->parent, | |
739 | "Bad carveout rsc configuration\n"); | |
740 | ret = -ENOMEM; | |
741 | goto dma_free; | |
742 | } | |
3bc8140b | 743 | |
7168d914 DC |
744 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); |
745 | if (!mapping) { | |
7168d914 DC |
746 | ret = -ENOMEM; |
747 | goto dma_free; | |
748 | } | |
749 | ||
d7c51706 LP |
750 | ret = iommu_map(rproc->domain, mem->da, dma, mem->len, |
751 | mem->flags); | |
400e64df OBC |
752 | if (ret) { |
753 | dev_err(dev, "iommu_map failed: %d\n", ret); | |
7168d914 | 754 | goto free_mapping; |
400e64df OBC |
755 | } |
756 | ||
757 | /* | |
758 | * We'll need this info later when we'll want to unmap | |
759 | * everything (e.g. on shutdown). | |
760 | * | |
761 | * We can't trust the remote processor not to change the | |
762 | * resource table, so we must maintain this info independently. | |
763 | */ | |
d7c51706 LP |
764 | mapping->da = mem->da; |
765 | mapping->len = mem->len; | |
400e64df OBC |
766 | list_add_tail(&mapping->node, &rproc->mappings); |
767 | ||
b605ed8b | 768 | dev_dbg(dev, "carveout mapped 0x%x to %pad\n", |
d7c51706 LP |
769 | mem->da, &dma); |
770 | } else { | |
771 | mem->da = (u32)dma; | |
400e64df OBC |
772 | } |
773 | ||
d7c51706 LP |
774 | mem->dma = (u32)dma; |
775 | mem->va = va; | |
400e64df OBC |
776 | |
777 | return 0; | |
778 | ||
7168d914 DC |
779 | free_mapping: |
780 | kfree(mapping); | |
400e64df | 781 | dma_free: |
d7c51706 | 782 | dma_free_coherent(dev->parent, mem->len, va, dma); |
400e64df OBC |
783 | return ret; |
784 | } | |
785 | ||
d7c51706 LP |
786 | /** |
787 | * rproc_release_carveout() - release acquired carveout | |
788 | * @rproc: rproc handle | |
789 | * @mem: the memory entry to release | |
790 | * | |
791 | * This function releases specified memory entry @mem allocated via | |
792 | * rproc_alloc_carveout() function by @rproc. | |
793 | */ | |
794 | static int rproc_release_carveout(struct rproc *rproc, | |
795 | struct rproc_mem_entry *mem) | |
796 | { | |
797 | struct device *dev = &rproc->dev; | |
798 | ||
799 | /* clean up carveout allocations */ | |
800 | dma_free_coherent(dev->parent, mem->len, mem->va, mem->dma); | |
801 | return 0; | |
802 | } | |
803 | ||
804 | /** | |
805 | * rproc_handle_carveout() - handle phys contig memory allocation requests | |
806 | * @rproc: rproc handle | |
807 | * @rsc: the resource entry | |
808 | * @avail: size of available data (for image validation) | |
809 | * | |
810 | * This function will handle firmware requests for allocation of physically | |
811 | * contiguous memory regions. | |
812 | * | |
813 | * These request entries should come first in the firmware's resource table, | |
814 | * as other firmware entries might request placing other data objects inside | |
815 | * these memory regions (e.g. data/code segments, trace resource entries, ...). | |
816 | * | |
817 | * Allocating memory this way helps utilizing the reserved physical memory | |
818 | * (e.g. CMA) more efficiently, and also minimizes the number of TLB entries | |
819 | * needed to map it (in case @rproc is using an IOMMU). Reducing the TLB | |
820 | * pressure is important; it may have a substantial impact on performance. | |
821 | */ | |
822 | static int rproc_handle_carveout(struct rproc *rproc, | |
823 | struct fw_rsc_carveout *rsc, | |
824 | int offset, int avail) | |
825 | { | |
826 | struct rproc_mem_entry *carveout; | |
827 | struct device *dev = &rproc->dev; | |
828 | ||
829 | if (sizeof(*rsc) > avail) { | |
830 | dev_err(dev, "carveout rsc is truncated\n"); | |
831 | return -EINVAL; | |
832 | } | |
833 | ||
834 | /* make sure reserved bytes are zeroes */ | |
835 | if (rsc->reserved) { | |
836 | dev_err(dev, "carveout rsc has non zero reserved bytes\n"); | |
837 | return -EINVAL; | |
838 | } | |
839 | ||
840 | dev_dbg(dev, "carveout rsc: name: %s, da 0x%x, pa 0x%x, len 0x%x, flags 0x%x\n", | |
841 | rsc->name, rsc->da, rsc->pa, rsc->len, rsc->flags); | |
842 | ||
ffa5f9c8 LP |
843 | /* |
844 | * Check carveout rsc already part of a registered carveout, | |
845 | * Search by name, then check the da and length | |
846 | */ | |
847 | carveout = rproc_find_carveout_by_name(rproc, rsc->name); | |
848 | ||
849 | if (carveout) { | |
850 | if (carveout->rsc_offset != FW_RSC_ADDR_ANY) { | |
851 | dev_err(dev, | |
852 | "Carveout already associated to resource table\n"); | |
853 | return -ENOMEM; | |
854 | } | |
855 | ||
856 | if (rproc_check_carveout_da(rproc, carveout, rsc->da, rsc->len)) | |
857 | return -ENOMEM; | |
858 | ||
859 | /* Update memory carveout with resource table info */ | |
860 | carveout->rsc_offset = offset; | |
861 | carveout->flags = rsc->flags; | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
d7c51706 LP |
866 | /* Register carveout in in list */ |
867 | carveout = rproc_mem_entry_init(dev, 0, 0, rsc->len, rsc->da, | |
868 | rproc_alloc_carveout, | |
869 | rproc_release_carveout, rsc->name); | |
870 | if (!carveout) { | |
871 | dev_err(dev, "Can't allocate memory entry structure\n"); | |
872 | return -ENOMEM; | |
873 | } | |
874 | ||
875 | carveout->flags = rsc->flags; | |
876 | carveout->rsc_offset = offset; | |
877 | rproc_add_carveout(rproc, carveout); | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
15c0b025 LP |
882 | /** |
883 | * rproc_add_carveout() - register an allocated carveout region | |
884 | * @rproc: rproc handle | |
885 | * @mem: memory entry to register | |
886 | * | |
887 | * This function registers specified memory entry in @rproc carveouts list. | |
888 | * Specified carveout should have been allocated before registering. | |
889 | */ | |
890 | void rproc_add_carveout(struct rproc *rproc, struct rproc_mem_entry *mem) | |
891 | { | |
892 | list_add_tail(&mem->node, &rproc->carveouts); | |
893 | } | |
894 | EXPORT_SYMBOL(rproc_add_carveout); | |
895 | ||
72029c90 LP |
896 | /** |
897 | * rproc_mem_entry_init() - allocate and initialize rproc_mem_entry struct | |
898 | * @dev: pointer on device struct | |
899 | * @va: virtual address | |
900 | * @dma: dma address | |
901 | * @len: memory carveout length | |
902 | * @da: device address | |
903 | * @release: memory carveout function | |
904 | * @name: carveout name | |
905 | * | |
906 | * This function allocates a rproc_mem_entry struct and fill it with parameters | |
907 | * provided by client. | |
908 | */ | |
909 | struct rproc_mem_entry * | |
910 | rproc_mem_entry_init(struct device *dev, | |
911 | void *va, dma_addr_t dma, int len, u32 da, | |
d7c51706 | 912 | int (*alloc)(struct rproc *, struct rproc_mem_entry *), |
72029c90 LP |
913 | int (*release)(struct rproc *, struct rproc_mem_entry *), |
914 | const char *name, ...) | |
915 | { | |
916 | struct rproc_mem_entry *mem; | |
917 | va_list args; | |
918 | ||
919 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); | |
920 | if (!mem) | |
921 | return mem; | |
922 | ||
923 | mem->va = va; | |
924 | mem->dma = dma; | |
925 | mem->da = da; | |
926 | mem->len = len; | |
d7c51706 | 927 | mem->alloc = alloc; |
72029c90 | 928 | mem->release = release; |
d7c51706 | 929 | mem->rsc_offset = FW_RSC_ADDR_ANY; |
1429cca1 | 930 | mem->of_resm_idx = -1; |
72029c90 LP |
931 | |
932 | va_start(args, name); | |
933 | vsnprintf(mem->name, sizeof(mem->name), name, args); | |
934 | va_end(args); | |
935 | ||
936 | return mem; | |
937 | } | |
938 | EXPORT_SYMBOL(rproc_mem_entry_init); | |
939 | ||
1429cca1 LP |
940 | /** |
941 | * rproc_of_resm_mem_entry_init() - allocate and initialize rproc_mem_entry struct | |
942 | * from a reserved memory phandle | |
943 | * @dev: pointer on device struct | |
944 | * @of_resm_idx: reserved memory phandle index in "memory-region" | |
945 | * @len: memory carveout length | |
946 | * @da: device address | |
947 | * @name: carveout name | |
948 | * | |
949 | * This function allocates a rproc_mem_entry struct and fill it with parameters | |
950 | * provided by client. | |
951 | */ | |
952 | struct rproc_mem_entry * | |
953 | rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, int len, | |
954 | u32 da, const char *name, ...) | |
955 | { | |
956 | struct rproc_mem_entry *mem; | |
957 | va_list args; | |
958 | ||
959 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); | |
960 | if (!mem) | |
961 | return mem; | |
962 | ||
963 | mem->da = da; | |
964 | mem->len = len; | |
965 | mem->rsc_offset = FW_RSC_ADDR_ANY; | |
966 | mem->of_resm_idx = of_resm_idx; | |
967 | ||
968 | va_start(args, name); | |
969 | vsnprintf(mem->name, sizeof(mem->name), name, args); | |
970 | va_end(args); | |
971 | ||
972 | return mem; | |
973 | } | |
974 | EXPORT_SYMBOL(rproc_of_resm_mem_entry_init); | |
975 | ||
72029c90 | 976 | /** |
e12bc14b OBC |
977 | * A lookup table for resource handlers. The indices are defined in |
978 | * enum fw_resource_type. | |
979 | */ | |
232fcdbb | 980 | static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = { |
fd2c15ec OBC |
981 | [RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout, |
982 | [RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem, | |
983 | [RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace, | |
232fcdbb SB |
984 | [RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev, |
985 | }; | |
986 | ||
400e64df | 987 | /* handle firmware resource entries before booting the remote processor */ |
a4b24c75 | 988 | static int rproc_handle_resources(struct rproc *rproc, |
232fcdbb | 989 | rproc_handle_resource_t handlers[RSC_LAST]) |
400e64df | 990 | { |
b5ab5e24 | 991 | struct device *dev = &rproc->dev; |
e12bc14b | 992 | rproc_handle_resource_t handler; |
fd2c15ec OBC |
993 | int ret = 0, i; |
994 | ||
d4bb86f2 BA |
995 | if (!rproc->table_ptr) |
996 | return 0; | |
997 | ||
a2b950ac OBC |
998 | for (i = 0; i < rproc->table_ptr->num; i++) { |
999 | int offset = rproc->table_ptr->offset[i]; | |
1000 | struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset; | |
a4b24c75 | 1001 | int avail = rproc->table_sz - offset - sizeof(*hdr); |
fd2c15ec OBC |
1002 | void *rsc = (void *)hdr + sizeof(*hdr); |
1003 | ||
1004 | /* make sure table isn't truncated */ | |
1005 | if (avail < 0) { | |
1006 | dev_err(dev, "rsc table is truncated\n"); | |
1007 | return -EINVAL; | |
1008 | } | |
400e64df | 1009 | |
fd2c15ec | 1010 | dev_dbg(dev, "rsc: type %d\n", hdr->type); |
400e64df | 1011 | |
fd2c15ec OBC |
1012 | if (hdr->type >= RSC_LAST) { |
1013 | dev_warn(dev, "unsupported resource %d\n", hdr->type); | |
e12bc14b | 1014 | continue; |
400e64df OBC |
1015 | } |
1016 | ||
232fcdbb | 1017 | handler = handlers[hdr->type]; |
e12bc14b OBC |
1018 | if (!handler) |
1019 | continue; | |
1020 | ||
a2b950ac | 1021 | ret = handler(rproc, rsc, offset + sizeof(*hdr), avail); |
7a186941 | 1022 | if (ret) |
400e64df | 1023 | break; |
fd2c15ec | 1024 | } |
400e64df OBC |
1025 | |
1026 | return ret; | |
1027 | } | |
1028 | ||
c455daa4 BA |
1029 | static int rproc_prepare_subdevices(struct rproc *rproc) |
1030 | { | |
1031 | struct rproc_subdev *subdev; | |
1032 | int ret; | |
1033 | ||
1034 | list_for_each_entry(subdev, &rproc->subdevs, node) { | |
1035 | if (subdev->prepare) { | |
1036 | ret = subdev->prepare(subdev); | |
1037 | if (ret) | |
1038 | goto unroll_preparation; | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | return 0; | |
1043 | ||
1044 | unroll_preparation: | |
1045 | list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) { | |
1046 | if (subdev->unprepare) | |
1047 | subdev->unprepare(subdev); | |
1048 | } | |
1049 | ||
1050 | return ret; | |
1051 | } | |
1052 | ||
618fcff3 | 1053 | static int rproc_start_subdevices(struct rproc *rproc) |
7bdc9650 BA |
1054 | { |
1055 | struct rproc_subdev *subdev; | |
1056 | int ret; | |
1057 | ||
1058 | list_for_each_entry(subdev, &rproc->subdevs, node) { | |
be37b1e0 BA |
1059 | if (subdev->start) { |
1060 | ret = subdev->start(subdev); | |
1061 | if (ret) | |
1062 | goto unroll_registration; | |
1063 | } | |
7bdc9650 BA |
1064 | } |
1065 | ||
1066 | return 0; | |
1067 | ||
1068 | unroll_registration: | |
be37b1e0 BA |
1069 | list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) { |
1070 | if (subdev->stop) | |
1071 | subdev->stop(subdev, true); | |
1072 | } | |
7bdc9650 BA |
1073 | |
1074 | return ret; | |
1075 | } | |
1076 | ||
618fcff3 | 1077 | static void rproc_stop_subdevices(struct rproc *rproc, bool crashed) |
7bdc9650 BA |
1078 | { |
1079 | struct rproc_subdev *subdev; | |
1080 | ||
be37b1e0 BA |
1081 | list_for_each_entry_reverse(subdev, &rproc->subdevs, node) { |
1082 | if (subdev->stop) | |
1083 | subdev->stop(subdev, crashed); | |
1084 | } | |
7bdc9650 BA |
1085 | } |
1086 | ||
c455daa4 BA |
1087 | static void rproc_unprepare_subdevices(struct rproc *rproc) |
1088 | { | |
1089 | struct rproc_subdev *subdev; | |
1090 | ||
1091 | list_for_each_entry_reverse(subdev, &rproc->subdevs, node) { | |
1092 | if (subdev->unprepare) | |
1093 | subdev->unprepare(subdev); | |
1094 | } | |
1095 | } | |
1096 | ||
d7c51706 LP |
1097 | /** |
1098 | * rproc_alloc_registered_carveouts() - allocate all carveouts registered | |
1099 | * in the list | |
1100 | * @rproc: the remote processor handle | |
1101 | * | |
1102 | * This function parses registered carveout list, performs allocation | |
1103 | * if alloc() ops registered and updates resource table information | |
1104 | * if rsc_offset set. | |
1105 | * | |
1106 | * Return: 0 on success | |
1107 | */ | |
1108 | static int rproc_alloc_registered_carveouts(struct rproc *rproc) | |
1109 | { | |
1110 | struct rproc_mem_entry *entry, *tmp; | |
1111 | struct fw_rsc_carveout *rsc; | |
1112 | struct device *dev = &rproc->dev; | |
1113 | int ret; | |
1114 | ||
1115 | list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { | |
1116 | if (entry->alloc) { | |
1117 | ret = entry->alloc(rproc, entry); | |
1118 | if (ret) { | |
1119 | dev_err(dev, "Unable to allocate carveout %s: %d\n", | |
1120 | entry->name, ret); | |
1121 | return -ENOMEM; | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | if (entry->rsc_offset != FW_RSC_ADDR_ANY) { | |
1126 | /* update resource table */ | |
1127 | rsc = (void *)rproc->table_ptr + entry->rsc_offset; | |
1128 | ||
1129 | /* | |
1130 | * Some remote processors might need to know the pa | |
1131 | * even though they are behind an IOMMU. E.g., OMAP4's | |
1132 | * remote M3 processor needs this so it can control | |
1133 | * on-chip hardware accelerators that are not behind | |
1134 | * the IOMMU, and therefor must know the pa. | |
1135 | * | |
1136 | * Generally we don't want to expose physical addresses | |
1137 | * if we don't have to (remote processors are generally | |
1138 | * _not_ trusted), so we might want to do this only for | |
1139 | * remote processor that _must_ have this (e.g. OMAP4's | |
1140 | * dual M3 subsystem). | |
1141 | * | |
1142 | * Non-IOMMU processors might also want to have this info. | |
1143 | * In this case, the device address and the physical address | |
1144 | * are the same. | |
1145 | */ | |
ffa5f9c8 LP |
1146 | |
1147 | /* Use va if defined else dma to generate pa */ | |
d7c51706 LP |
1148 | if (entry->va) |
1149 | rsc->pa = (u32)rproc_va_to_pa(entry->va); | |
ffa5f9c8 LP |
1150 | else |
1151 | rsc->pa = (u32)entry->dma; | |
1152 | ||
1153 | rsc->da = entry->da; | |
1154 | rsc->len = entry->len; | |
d7c51706 LP |
1155 | } |
1156 | } | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
2666ca91 SJ |
1161 | /** |
1162 | * rproc_coredump_cleanup() - clean up dump_segments list | |
1163 | * @rproc: the remote processor handle | |
1164 | */ | |
1165 | static void rproc_coredump_cleanup(struct rproc *rproc) | |
1166 | { | |
1167 | struct rproc_dump_segment *entry, *tmp; | |
1168 | ||
1169 | list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) { | |
1170 | list_del(&entry->node); | |
1171 | kfree(entry); | |
1172 | } | |
1173 | } | |
1174 | ||
400e64df OBC |
1175 | /** |
1176 | * rproc_resource_cleanup() - clean up and free all acquired resources | |
1177 | * @rproc: rproc handle | |
1178 | * | |
1179 | * This function will free all resources acquired for @rproc, and it | |
7a186941 | 1180 | * is called whenever @rproc either shuts down or fails to boot. |
400e64df OBC |
1181 | */ |
1182 | static void rproc_resource_cleanup(struct rproc *rproc) | |
1183 | { | |
1184 | struct rproc_mem_entry *entry, *tmp; | |
d81fb32f | 1185 | struct rproc_vdev *rvdev, *rvtmp; |
b5ab5e24 | 1186 | struct device *dev = &rproc->dev; |
400e64df OBC |
1187 | |
1188 | /* clean up debugfs trace entries */ | |
1189 | list_for_each_entry_safe(entry, tmp, &rproc->traces, node) { | |
1190 | rproc_remove_trace_file(entry->priv); | |
1191 | rproc->num_traces--; | |
1192 | list_del(&entry->node); | |
1193 | kfree(entry); | |
1194 | } | |
1195 | ||
400e64df OBC |
1196 | /* clean up iommu mapping entries */ |
1197 | list_for_each_entry_safe(entry, tmp, &rproc->mappings, node) { | |
1198 | size_t unmapped; | |
1199 | ||
1200 | unmapped = iommu_unmap(rproc->domain, entry->da, entry->len); | |
1201 | if (unmapped != entry->len) { | |
1202 | /* nothing much to do besides complaining */ | |
e981f6d4 | 1203 | dev_err(dev, "failed to unmap %u/%zu\n", entry->len, |
730f84ce | 1204 | unmapped); |
400e64df OBC |
1205 | } |
1206 | ||
1207 | list_del(&entry->node); | |
1208 | kfree(entry); | |
1209 | } | |
b6356a01 SA |
1210 | |
1211 | /* clean up carveout allocations */ | |
1212 | list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { | |
f2e74abf LP |
1213 | if (entry->release) |
1214 | entry->release(rproc, entry); | |
b6356a01 SA |
1215 | list_del(&entry->node); |
1216 | kfree(entry); | |
1217 | } | |
d81fb32f BA |
1218 | |
1219 | /* clean up remote vdev entries */ | |
f5bcb353 | 1220 | list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node) |
2b45cef5 | 1221 | kref_put(&rvdev->refcount, rproc_vdev_release); |
2666ca91 SJ |
1222 | |
1223 | rproc_coredump_cleanup(rproc); | |
400e64df OBC |
1224 | } |
1225 | ||
1efa30d0 SJ |
1226 | static int rproc_start(struct rproc *rproc, const struct firmware *fw) |
1227 | { | |
a4b24c75 | 1228 | struct resource_table *loaded_table; |
1efa30d0 | 1229 | struct device *dev = &rproc->dev; |
a4b24c75 | 1230 | int ret; |
1efa30d0 SJ |
1231 | |
1232 | /* load the ELF segments to memory */ | |
1233 | ret = rproc_load_segments(rproc, fw); | |
1234 | if (ret) { | |
1235 | dev_err(dev, "Failed to load program segments: %d\n", ret); | |
1236 | return ret; | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * The starting device has been given the rproc->cached_table as the | |
1241 | * resource table. The address of the vring along with the other | |
1242 | * allocated resources (carveouts etc) is stored in cached_table. | |
1243 | * In order to pass this information to the remote device we must copy | |
1244 | * this information to device memory. We also update the table_ptr so | |
1245 | * that any subsequent changes will be applied to the loaded version. | |
1246 | */ | |
1247 | loaded_table = rproc_find_loaded_rsc_table(rproc, fw); | |
1248 | if (loaded_table) { | |
a4b24c75 | 1249 | memcpy(loaded_table, rproc->cached_table, rproc->table_sz); |
1efa30d0 SJ |
1250 | rproc->table_ptr = loaded_table; |
1251 | } | |
1252 | ||
c455daa4 BA |
1253 | ret = rproc_prepare_subdevices(rproc); |
1254 | if (ret) { | |
1255 | dev_err(dev, "failed to prepare subdevices for %s: %d\n", | |
1256 | rproc->name, ret); | |
f68d51bd | 1257 | goto reset_table_ptr; |
c455daa4 BA |
1258 | } |
1259 | ||
1efa30d0 SJ |
1260 | /* power up the remote processor */ |
1261 | ret = rproc->ops->start(rproc); | |
1262 | if (ret) { | |
1263 | dev_err(dev, "can't start rproc %s: %d\n", rproc->name, ret); | |
c455daa4 | 1264 | goto unprepare_subdevices; |
1efa30d0 SJ |
1265 | } |
1266 | ||
618fcff3 BA |
1267 | /* Start any subdevices for the remote processor */ |
1268 | ret = rproc_start_subdevices(rproc); | |
1efa30d0 SJ |
1269 | if (ret) { |
1270 | dev_err(dev, "failed to probe subdevices for %s: %d\n", | |
1271 | rproc->name, ret); | |
c455daa4 | 1272 | goto stop_rproc; |
1efa30d0 SJ |
1273 | } |
1274 | ||
1275 | rproc->state = RPROC_RUNNING; | |
1276 | ||
1277 | dev_info(dev, "remote processor %s is now up\n", rproc->name); | |
1278 | ||
1279 | return 0; | |
c455daa4 BA |
1280 | |
1281 | stop_rproc: | |
1282 | rproc->ops->stop(rproc); | |
c455daa4 BA |
1283 | unprepare_subdevices: |
1284 | rproc_unprepare_subdevices(rproc); | |
f68d51bd SA |
1285 | reset_table_ptr: |
1286 | rproc->table_ptr = rproc->cached_table; | |
c455daa4 BA |
1287 | |
1288 | return ret; | |
1efa30d0 SJ |
1289 | } |
1290 | ||
400e64df OBC |
1291 | /* |
1292 | * take a firmware and boot a remote processor with it. | |
1293 | */ | |
1294 | static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) | |
1295 | { | |
b5ab5e24 | 1296 | struct device *dev = &rproc->dev; |
400e64df | 1297 | const char *name = rproc->firmware; |
58b64090 | 1298 | int ret; |
400e64df OBC |
1299 | |
1300 | ret = rproc_fw_sanity_check(rproc, fw); | |
1301 | if (ret) | |
1302 | return ret; | |
1303 | ||
e981f6d4 | 1304 | dev_info(dev, "Booting fw image %s, size %zd\n", name, fw->size); |
400e64df OBC |
1305 | |
1306 | /* | |
1307 | * if enabling an IOMMU isn't relevant for this rproc, this is | |
1308 | * just a nop | |
1309 | */ | |
1310 | ret = rproc_enable_iommu(rproc); | |
1311 | if (ret) { | |
1312 | dev_err(dev, "can't enable iommu: %d\n", ret); | |
1313 | return ret; | |
1314 | } | |
1315 | ||
3e5f9eb5 | 1316 | rproc->bootaddr = rproc_get_boot_addr(rproc, fw); |
988d204c | 1317 | |
c1d35c1a BA |
1318 | /* Load resource table, core dump segment list etc from the firmware */ |
1319 | ret = rproc_parse_fw(rproc, fw); | |
58b64090 BA |
1320 | if (ret) |
1321 | goto disable_iommu; | |
a0c10687 | 1322 | |
b35d7afc BA |
1323 | /* reset max_notifyid */ |
1324 | rproc->max_notifyid = -1; | |
1325 | ||
c6aed238 LP |
1326 | /* reset handled vdev */ |
1327 | rproc->nb_vdev = 0; | |
1328 | ||
400e64df | 1329 | /* handle fw resources which are required to boot rproc */ |
a4b24c75 | 1330 | ret = rproc_handle_resources(rproc, rproc_loading_handlers); |
400e64df OBC |
1331 | if (ret) { |
1332 | dev_err(dev, "Failed to process resources: %d\n", ret); | |
229b85a6 | 1333 | goto clean_up_resources; |
400e64df OBC |
1334 | } |
1335 | ||
d7c51706 LP |
1336 | /* Allocate carveout resources associated to rproc */ |
1337 | ret = rproc_alloc_registered_carveouts(rproc); | |
1338 | if (ret) { | |
1339 | dev_err(dev, "Failed to allocate associated carveouts: %d\n", | |
1340 | ret); | |
1341 | goto clean_up_resources; | |
1342 | } | |
1343 | ||
1efa30d0 SJ |
1344 | ret = rproc_start(rproc, fw); |
1345 | if (ret) | |
229b85a6 | 1346 | goto clean_up_resources; |
400e64df OBC |
1347 | |
1348 | return 0; | |
1349 | ||
229b85a6 BA |
1350 | clean_up_resources: |
1351 | rproc_resource_cleanup(rproc); | |
a0c10687 BA |
1352 | kfree(rproc->cached_table); |
1353 | rproc->cached_table = NULL; | |
988d204c | 1354 | rproc->table_ptr = NULL; |
58b64090 | 1355 | disable_iommu: |
400e64df OBC |
1356 | rproc_disable_iommu(rproc); |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | /* | |
5e6533f7 | 1361 | * take a firmware and boot it up. |
400e64df OBC |
1362 | * |
1363 | * Note: this function is called asynchronously upon registration of the | |
1364 | * remote processor (so we must wait until it completes before we try | |
1365 | * to unregister the device. one other option is just to use kref here, | |
1366 | * that might be cleaner). | |
1367 | */ | |
5e6533f7 | 1368 | static void rproc_auto_boot_callback(const struct firmware *fw, void *context) |
400e64df OBC |
1369 | { |
1370 | struct rproc *rproc = context; | |
a2b950ac | 1371 | |
7a20c64d | 1372 | rproc_boot(rproc); |
ddf71187 | 1373 | |
3cc6e787 | 1374 | release_firmware(fw); |
400e64df OBC |
1375 | } |
1376 | ||
5e6533f7 | 1377 | static int rproc_trigger_auto_boot(struct rproc *rproc) |
70b85ef8 FGL |
1378 | { |
1379 | int ret; | |
1380 | ||
70b85ef8 | 1381 | /* |
70b85ef8 FGL |
1382 | * We're initiating an asynchronous firmware loading, so we can |
1383 | * be built-in kernel code, without hanging the boot process. | |
1384 | */ | |
1385 | ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG, | |
1386 | rproc->firmware, &rproc->dev, GFP_KERNEL, | |
5e6533f7 | 1387 | rproc, rproc_auto_boot_callback); |
2099c77d | 1388 | if (ret < 0) |
70b85ef8 | 1389 | dev_err(&rproc->dev, "request_firmware_nowait err: %d\n", ret); |
70b85ef8 FGL |
1390 | |
1391 | return ret; | |
1392 | } | |
1393 | ||
880f5b38 | 1394 | static int rproc_stop(struct rproc *rproc, bool crashed) |
1efa30d0 SJ |
1395 | { |
1396 | struct device *dev = &rproc->dev; | |
1397 | int ret; | |
1398 | ||
618fcff3 BA |
1399 | /* Stop any subdevices for the remote processor */ |
1400 | rproc_stop_subdevices(rproc, crashed); | |
1efa30d0 | 1401 | |
0a8b81cb BA |
1402 | /* the installed resource table is no longer accessible */ |
1403 | rproc->table_ptr = rproc->cached_table; | |
1404 | ||
1efa30d0 SJ |
1405 | /* power off the remote processor */ |
1406 | ret = rproc->ops->stop(rproc); | |
1407 | if (ret) { | |
1408 | dev_err(dev, "can't stop rproc: %d\n", ret); | |
1409 | return ret; | |
1410 | } | |
1411 | ||
c455daa4 BA |
1412 | rproc_unprepare_subdevices(rproc); |
1413 | ||
1efa30d0 SJ |
1414 | rproc->state = RPROC_OFFLINE; |
1415 | ||
1416 | dev_info(dev, "stopped remote processor %s\n", rproc->name); | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
2666ca91 SJ |
1421 | /** |
1422 | * rproc_coredump_add_segment() - add segment of device memory to coredump | |
1423 | * @rproc: handle of a remote processor | |
1424 | * @da: device address | |
1425 | * @size: size of segment | |
1426 | * | |
1427 | * Add device memory to the list of segments to be included in a coredump for | |
1428 | * the remoteproc. | |
1429 | * | |
1430 | * Return: 0 on success, negative errno on error. | |
1431 | */ | |
1432 | int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size) | |
1433 | { | |
1434 | struct rproc_dump_segment *segment; | |
1435 | ||
1436 | segment = kzalloc(sizeof(*segment), GFP_KERNEL); | |
1437 | if (!segment) | |
1438 | return -ENOMEM; | |
1439 | ||
1440 | segment->da = da; | |
1441 | segment->size = size; | |
1442 | ||
1443 | list_add_tail(&segment->node, &rproc->dump_segments); | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | EXPORT_SYMBOL(rproc_coredump_add_segment); | |
1448 | ||
ab8f873b SS |
1449 | /** |
1450 | * rproc_coredump_add_custom_segment() - add custom coredump segment | |
1451 | * @rproc: handle of a remote processor | |
1452 | * @da: device address | |
1453 | * @size: size of segment | |
1454 | * @dumpfn: custom dump function called for each segment during coredump | |
1455 | * @priv: private data | |
1456 | * | |
1457 | * Add device memory to the list of segments to be included in the coredump | |
1458 | * and associate the segment with the given custom dump function and private | |
1459 | * data. | |
1460 | * | |
1461 | * Return: 0 on success, negative errno on error. | |
1462 | */ | |
1463 | int rproc_coredump_add_custom_segment(struct rproc *rproc, | |
1464 | dma_addr_t da, size_t size, | |
1465 | void (*dumpfn)(struct rproc *rproc, | |
1466 | struct rproc_dump_segment *segment, | |
1467 | void *dest), | |
1468 | void *priv) | |
1469 | { | |
1470 | struct rproc_dump_segment *segment; | |
1471 | ||
1472 | segment = kzalloc(sizeof(*segment), GFP_KERNEL); | |
1473 | if (!segment) | |
1474 | return -ENOMEM; | |
1475 | ||
1476 | segment->da = da; | |
1477 | segment->size = size; | |
1478 | segment->priv = priv; | |
1479 | segment->dump = dumpfn; | |
1480 | ||
1481 | list_add_tail(&segment->node, &rproc->dump_segments); | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | EXPORT_SYMBOL(rproc_coredump_add_custom_segment); | |
1486 | ||
2666ca91 SJ |
1487 | /** |
1488 | * rproc_coredump() - perform coredump | |
1489 | * @rproc: rproc handle | |
1490 | * | |
1491 | * This function will generate an ELF header for the registered segments | |
1492 | * and create a devcoredump device associated with rproc. | |
1493 | */ | |
1494 | static void rproc_coredump(struct rproc *rproc) | |
1495 | { | |
1496 | struct rproc_dump_segment *segment; | |
1497 | struct elf32_phdr *phdr; | |
1498 | struct elf32_hdr *ehdr; | |
1499 | size_t data_size; | |
1500 | size_t offset; | |
1501 | void *data; | |
1502 | void *ptr; | |
1503 | int phnum = 0; | |
1504 | ||
1505 | if (list_empty(&rproc->dump_segments)) | |
1506 | return; | |
1507 | ||
1508 | data_size = sizeof(*ehdr); | |
1509 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
1510 | data_size += sizeof(*phdr) + segment->size; | |
1511 | ||
1512 | phnum++; | |
1513 | } | |
1514 | ||
1515 | data = vmalloc(data_size); | |
1516 | if (!data) | |
1517 | return; | |
1518 | ||
1519 | ehdr = data; | |
1520 | ||
1521 | memset(ehdr, 0, sizeof(*ehdr)); | |
1522 | memcpy(ehdr->e_ident, ELFMAG, SELFMAG); | |
1523 | ehdr->e_ident[EI_CLASS] = ELFCLASS32; | |
1524 | ehdr->e_ident[EI_DATA] = ELFDATA2LSB; | |
1525 | ehdr->e_ident[EI_VERSION] = EV_CURRENT; | |
1526 | ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; | |
1527 | ehdr->e_type = ET_CORE; | |
1528 | ehdr->e_machine = EM_NONE; | |
1529 | ehdr->e_version = EV_CURRENT; | |
1530 | ehdr->e_entry = rproc->bootaddr; | |
1531 | ehdr->e_phoff = sizeof(*ehdr); | |
1532 | ehdr->e_ehsize = sizeof(*ehdr); | |
1533 | ehdr->e_phentsize = sizeof(*phdr); | |
1534 | ehdr->e_phnum = phnum; | |
1535 | ||
1536 | phdr = data + ehdr->e_phoff; | |
1537 | offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; | |
1538 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
1539 | memset(phdr, 0, sizeof(*phdr)); | |
1540 | phdr->p_type = PT_LOAD; | |
1541 | phdr->p_offset = offset; | |
1542 | phdr->p_vaddr = segment->da; | |
1543 | phdr->p_paddr = segment->da; | |
1544 | phdr->p_filesz = segment->size; | |
1545 | phdr->p_memsz = segment->size; | |
1546 | phdr->p_flags = PF_R | PF_W | PF_X; | |
1547 | phdr->p_align = 0; | |
1548 | ||
3952105d SS |
1549 | if (segment->dump) { |
1550 | segment->dump(rproc, segment, data + offset); | |
2666ca91 | 1551 | } else { |
3952105d SS |
1552 | ptr = rproc_da_to_va(rproc, segment->da, segment->size); |
1553 | if (!ptr) { | |
1554 | dev_err(&rproc->dev, | |
1555 | "invalid coredump segment (%pad, %zu)\n", | |
1556 | &segment->da, segment->size); | |
1557 | memset(data + offset, 0xff, segment->size); | |
1558 | } else { | |
1559 | memcpy(data + offset, ptr, segment->size); | |
1560 | } | |
2666ca91 SJ |
1561 | } |
1562 | ||
1563 | offset += phdr->p_filesz; | |
1564 | phdr++; | |
1565 | } | |
1566 | ||
1567 | dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); | |
1568 | } | |
1569 | ||
70b85ef8 FGL |
1570 | /** |
1571 | * rproc_trigger_recovery() - recover a remoteproc | |
1572 | * @rproc: the remote processor | |
1573 | * | |
56324d7a | 1574 | * The recovery is done by resetting all the virtio devices, that way all the |
70b85ef8 FGL |
1575 | * rpmsg drivers will be reseted along with the remote processor making the |
1576 | * remoteproc functional again. | |
1577 | * | |
1578 | * This function can sleep, so it cannot be called from atomic context. | |
1579 | */ | |
1580 | int rproc_trigger_recovery(struct rproc *rproc) | |
1581 | { | |
7e83cab8 SJ |
1582 | const struct firmware *firmware_p; |
1583 | struct device *dev = &rproc->dev; | |
1584 | int ret; | |
1585 | ||
1586 | dev_err(dev, "recovering %s\n", rproc->name); | |
70b85ef8 | 1587 | |
7e83cab8 SJ |
1588 | ret = mutex_lock_interruptible(&rproc->lock); |
1589 | if (ret) | |
1590 | return ret; | |
1591 | ||
fcd58037 | 1592 | ret = rproc_stop(rproc, true); |
7e83cab8 SJ |
1593 | if (ret) |
1594 | goto unlock_mutex; | |
ddf71187 | 1595 | |
2666ca91 SJ |
1596 | /* generate coredump */ |
1597 | rproc_coredump(rproc); | |
1598 | ||
7e83cab8 SJ |
1599 | /* load firmware */ |
1600 | ret = request_firmware(&firmware_p, rproc->firmware, dev); | |
1601 | if (ret < 0) { | |
1602 | dev_err(dev, "request_firmware failed: %d\n", ret); | |
1603 | goto unlock_mutex; | |
1604 | } | |
ddf71187 | 1605 | |
7e83cab8 SJ |
1606 | /* boot the remote processor up again */ |
1607 | ret = rproc_start(rproc, firmware_p); | |
1608 | ||
1609 | release_firmware(firmware_p); | |
1610 | ||
1611 | unlock_mutex: | |
1612 | mutex_unlock(&rproc->lock); | |
1613 | return ret; | |
70b85ef8 FGL |
1614 | } |
1615 | ||
8afd519c FGL |
1616 | /** |
1617 | * rproc_crash_handler_work() - handle a crash | |
1618 | * | |
1619 | * This function needs to handle everything related to a crash, like cpu | |
1620 | * registers and stack dump, information to help to debug the fatal error, etc. | |
1621 | */ | |
1622 | static void rproc_crash_handler_work(struct work_struct *work) | |
1623 | { | |
1624 | struct rproc *rproc = container_of(work, struct rproc, crash_handler); | |
1625 | struct device *dev = &rproc->dev; | |
1626 | ||
1627 | dev_dbg(dev, "enter %s\n", __func__); | |
1628 | ||
1629 | mutex_lock(&rproc->lock); | |
1630 | ||
1631 | if (rproc->state == RPROC_CRASHED || rproc->state == RPROC_OFFLINE) { | |
1632 | /* handle only the first crash detected */ | |
1633 | mutex_unlock(&rproc->lock); | |
1634 | return; | |
1635 | } | |
1636 | ||
1637 | rproc->state = RPROC_CRASHED; | |
1638 | dev_err(dev, "handling crash #%u in %s\n", ++rproc->crash_cnt, | |
1639 | rproc->name); | |
1640 | ||
1641 | mutex_unlock(&rproc->lock); | |
1642 | ||
2e37abb8 FGL |
1643 | if (!rproc->recovery_disabled) |
1644 | rproc_trigger_recovery(rproc); | |
8afd519c FGL |
1645 | } |
1646 | ||
400e64df | 1647 | /** |
1b0ef906 | 1648 | * rproc_boot() - boot a remote processor |
400e64df OBC |
1649 | * @rproc: handle of a remote processor |
1650 | * | |
1651 | * Boot a remote processor (i.e. load its firmware, power it on, ...). | |
1652 | * | |
1653 | * If the remote processor is already powered on, this function immediately | |
1654 | * returns (successfully). | |
1655 | * | |
1656 | * Returns 0 on success, and an appropriate error value otherwise. | |
1657 | */ | |
1b0ef906 | 1658 | int rproc_boot(struct rproc *rproc) |
400e64df OBC |
1659 | { |
1660 | const struct firmware *firmware_p; | |
1661 | struct device *dev; | |
1662 | int ret; | |
1663 | ||
1664 | if (!rproc) { | |
1665 | pr_err("invalid rproc handle\n"); | |
1666 | return -EINVAL; | |
1667 | } | |
1668 | ||
b5ab5e24 | 1669 | dev = &rproc->dev; |
400e64df OBC |
1670 | |
1671 | ret = mutex_lock_interruptible(&rproc->lock); | |
1672 | if (ret) { | |
1673 | dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret); | |
1674 | return ret; | |
1675 | } | |
1676 | ||
2099c77d SJ |
1677 | if (rproc->state == RPROC_DELETED) { |
1678 | ret = -ENODEV; | |
1679 | dev_err(dev, "can't boot deleted rproc %s\n", rproc->name); | |
1680 | goto unlock_mutex; | |
1681 | } | |
1682 | ||
400e64df OBC |
1683 | /* skip the boot process if rproc is already powered up */ |
1684 | if (atomic_inc_return(&rproc->power) > 1) { | |
1685 | ret = 0; | |
1686 | goto unlock_mutex; | |
1687 | } | |
1688 | ||
1689 | dev_info(dev, "powering up %s\n", rproc->name); | |
1690 | ||
1691 | /* load firmware */ | |
1692 | ret = request_firmware(&firmware_p, rproc->firmware, dev); | |
1693 | if (ret < 0) { | |
1694 | dev_err(dev, "request_firmware failed: %d\n", ret); | |
1695 | goto downref_rproc; | |
1696 | } | |
1697 | ||
1698 | ret = rproc_fw_boot(rproc, firmware_p); | |
1699 | ||
1700 | release_firmware(firmware_p); | |
1701 | ||
1702 | downref_rproc: | |
fbb6aacb | 1703 | if (ret) |
400e64df | 1704 | atomic_dec(&rproc->power); |
400e64df OBC |
1705 | unlock_mutex: |
1706 | mutex_unlock(&rproc->lock); | |
1707 | return ret; | |
1708 | } | |
1709 | EXPORT_SYMBOL(rproc_boot); | |
1710 | ||
1711 | /** | |
1712 | * rproc_shutdown() - power off the remote processor | |
1713 | * @rproc: the remote processor | |
1714 | * | |
1715 | * Power off a remote processor (previously booted with rproc_boot()). | |
1716 | * | |
1717 | * In case @rproc is still being used by an additional user(s), then | |
1718 | * this function will just decrement the power refcount and exit, | |
1719 | * without really powering off the device. | |
1720 | * | |
1721 | * Every call to rproc_boot() must (eventually) be accompanied by a call | |
1722 | * to rproc_shutdown(). Calling rproc_shutdown() redundantly is a bug. | |
1723 | * | |
1724 | * Notes: | |
1725 | * - we're not decrementing the rproc's refcount, only the power refcount. | |
1726 | * which means that the @rproc handle stays valid even after rproc_shutdown() | |
1727 | * returns, and users can still use it with a subsequent rproc_boot(), if | |
1728 | * needed. | |
400e64df OBC |
1729 | */ |
1730 | void rproc_shutdown(struct rproc *rproc) | |
1731 | { | |
b5ab5e24 | 1732 | struct device *dev = &rproc->dev; |
400e64df OBC |
1733 | int ret; |
1734 | ||
1735 | ret = mutex_lock_interruptible(&rproc->lock); | |
1736 | if (ret) { | |
1737 | dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret); | |
1738 | return; | |
1739 | } | |
1740 | ||
1741 | /* if the remote proc is still needed, bail out */ | |
1742 | if (!atomic_dec_and_test(&rproc->power)) | |
1743 | goto out; | |
1744 | ||
fcd58037 | 1745 | ret = rproc_stop(rproc, false); |
400e64df OBC |
1746 | if (ret) { |
1747 | atomic_inc(&rproc->power); | |
400e64df OBC |
1748 | goto out; |
1749 | } | |
1750 | ||
1751 | /* clean up all acquired resources */ | |
1752 | rproc_resource_cleanup(rproc); | |
1753 | ||
1754 | rproc_disable_iommu(rproc); | |
1755 | ||
988d204c | 1756 | /* Free the copy of the resource table */ |
a0c10687 BA |
1757 | kfree(rproc->cached_table); |
1758 | rproc->cached_table = NULL; | |
988d204c | 1759 | rproc->table_ptr = NULL; |
400e64df OBC |
1760 | out: |
1761 | mutex_unlock(&rproc->lock); | |
400e64df OBC |
1762 | } |
1763 | EXPORT_SYMBOL(rproc_shutdown); | |
1764 | ||
fec47d86 DG |
1765 | /** |
1766 | * rproc_get_by_phandle() - find a remote processor by phandle | |
1767 | * @phandle: phandle to the rproc | |
1768 | * | |
1769 | * Finds an rproc handle using the remote processor's phandle, and then | |
1770 | * return a handle to the rproc. | |
1771 | * | |
1772 | * This function increments the remote processor's refcount, so always | |
1773 | * use rproc_put() to decrement it back once rproc isn't needed anymore. | |
1774 | * | |
1775 | * Returns the rproc handle on success, and NULL on failure. | |
1776 | */ | |
8de3dbd0 | 1777 | #ifdef CONFIG_OF |
fec47d86 DG |
1778 | struct rproc *rproc_get_by_phandle(phandle phandle) |
1779 | { | |
1780 | struct rproc *rproc = NULL, *r; | |
1781 | struct device_node *np; | |
1782 | ||
1783 | np = of_find_node_by_phandle(phandle); | |
1784 | if (!np) | |
1785 | return NULL; | |
1786 | ||
1787 | mutex_lock(&rproc_list_mutex); | |
1788 | list_for_each_entry(r, &rproc_list, node) { | |
1789 | if (r->dev.parent && r->dev.parent->of_node == np) { | |
fbb6aacb BA |
1790 | /* prevent underlying implementation from being removed */ |
1791 | if (!try_module_get(r->dev.parent->driver->owner)) { | |
1792 | dev_err(&r->dev, "can't get owner\n"); | |
1793 | break; | |
1794 | } | |
1795 | ||
fec47d86 DG |
1796 | rproc = r; |
1797 | get_device(&rproc->dev); | |
1798 | break; | |
1799 | } | |
1800 | } | |
1801 | mutex_unlock(&rproc_list_mutex); | |
1802 | ||
1803 | of_node_put(np); | |
1804 | ||
1805 | return rproc; | |
1806 | } | |
8de3dbd0 OBC |
1807 | #else |
1808 | struct rproc *rproc_get_by_phandle(phandle phandle) | |
1809 | { | |
1810 | return NULL; | |
1811 | } | |
1812 | #endif | |
fec47d86 DG |
1813 | EXPORT_SYMBOL(rproc_get_by_phandle); |
1814 | ||
400e64df | 1815 | /** |
160e7c84 | 1816 | * rproc_add() - register a remote processor |
400e64df OBC |
1817 | * @rproc: the remote processor handle to register |
1818 | * | |
1819 | * Registers @rproc with the remoteproc framework, after it has been | |
1820 | * allocated with rproc_alloc(). | |
1821 | * | |
1822 | * This is called by the platform-specific rproc implementation, whenever | |
1823 | * a new remote processor device is probed. | |
1824 | * | |
1825 | * Returns 0 on success and an appropriate error code otherwise. | |
1826 | * | |
1827 | * Note: this function initiates an asynchronous firmware loading | |
1828 | * context, which will look for virtio devices supported by the rproc's | |
1829 | * firmware. | |
1830 | * | |
1831 | * If found, those virtio devices will be created and added, so as a result | |
7a186941 | 1832 | * of registering this remote processor, additional virtio drivers might be |
400e64df | 1833 | * probed. |
400e64df | 1834 | */ |
160e7c84 | 1835 | int rproc_add(struct rproc *rproc) |
400e64df | 1836 | { |
b5ab5e24 | 1837 | struct device *dev = &rproc->dev; |
70b85ef8 | 1838 | int ret; |
400e64df | 1839 | |
b5ab5e24 OBC |
1840 | ret = device_add(dev); |
1841 | if (ret < 0) | |
1842 | return ret; | |
400e64df | 1843 | |
b5ab5e24 | 1844 | dev_info(dev, "%s is available\n", rproc->name); |
400e64df OBC |
1845 | |
1846 | /* create debugfs entries */ | |
1847 | rproc_create_debug_dir(rproc); | |
7a20c64d SJ |
1848 | |
1849 | /* if rproc is marked always-on, request it to boot */ | |
1850 | if (rproc->auto_boot) { | |
5e6533f7 | 1851 | ret = rproc_trigger_auto_boot(rproc); |
7a20c64d SJ |
1852 | if (ret < 0) |
1853 | return ret; | |
1854 | } | |
400e64df | 1855 | |
d2e12e66 DG |
1856 | /* expose to rproc_get_by_phandle users */ |
1857 | mutex_lock(&rproc_list_mutex); | |
1858 | list_add(&rproc->node, &rproc_list); | |
1859 | mutex_unlock(&rproc_list_mutex); | |
1860 | ||
1861 | return 0; | |
400e64df | 1862 | } |
160e7c84 | 1863 | EXPORT_SYMBOL(rproc_add); |
400e64df | 1864 | |
b5ab5e24 OBC |
1865 | /** |
1866 | * rproc_type_release() - release a remote processor instance | |
1867 | * @dev: the rproc's device | |
1868 | * | |
1869 | * This function should _never_ be called directly. | |
1870 | * | |
1871 | * It will be called by the driver core when no one holds a valid pointer | |
1872 | * to @dev anymore. | |
1873 | */ | |
1874 | static void rproc_type_release(struct device *dev) | |
1875 | { | |
1876 | struct rproc *rproc = container_of(dev, struct rproc, dev); | |
1877 | ||
7183a2a7 OBC |
1878 | dev_info(&rproc->dev, "releasing %s\n", rproc->name); |
1879 | ||
b5ab5e24 OBC |
1880 | idr_destroy(&rproc->notifyids); |
1881 | ||
1882 | if (rproc->index >= 0) | |
1883 | ida_simple_remove(&rproc_dev_index, rproc->index); | |
1884 | ||
0f57dc6a | 1885 | kfree(rproc->firmware); |
fb98e2bd | 1886 | kfree(rproc->ops); |
b5ab5e24 OBC |
1887 | kfree(rproc); |
1888 | } | |
1889 | ||
c42ca04d | 1890 | static const struct device_type rproc_type = { |
b5ab5e24 OBC |
1891 | .name = "remoteproc", |
1892 | .release = rproc_type_release, | |
1893 | }; | |
400e64df OBC |
1894 | |
1895 | /** | |
1896 | * rproc_alloc() - allocate a remote processor handle | |
1897 | * @dev: the underlying device | |
1898 | * @name: name of this remote processor | |
1899 | * @ops: platform-specific handlers (mainly start/stop) | |
8b4aec9a | 1900 | * @firmware: name of firmware file to load, can be NULL |
400e64df OBC |
1901 | * @len: length of private data needed by the rproc driver (in bytes) |
1902 | * | |
1903 | * Allocates a new remote processor handle, but does not register | |
8b4aec9a | 1904 | * it yet. if @firmware is NULL, a default name is used. |
400e64df OBC |
1905 | * |
1906 | * This function should be used by rproc implementations during initialization | |
1907 | * of the remote processor. | |
1908 | * | |
1909 | * After creating an rproc handle using this function, and when ready, | |
160e7c84 | 1910 | * implementations should then call rproc_add() to complete |
400e64df OBC |
1911 | * the registration of the remote processor. |
1912 | * | |
1913 | * On success the new rproc is returned, and on failure, NULL. | |
1914 | * | |
1915 | * Note: _never_ directly deallocate @rproc, even if it was not registered | |
433c0e04 | 1916 | * yet. Instead, when you need to unroll rproc_alloc(), use rproc_free(). |
400e64df OBC |
1917 | */ |
1918 | struct rproc *rproc_alloc(struct device *dev, const char *name, | |
730f84ce AS |
1919 | const struct rproc_ops *ops, |
1920 | const char *firmware, int len) | |
400e64df OBC |
1921 | { |
1922 | struct rproc *rproc; | |
8b4aec9a | 1923 | char *p, *template = "rproc-%s-fw"; |
0f57dc6a | 1924 | int name_len; |
400e64df OBC |
1925 | |
1926 | if (!dev || !name || !ops) | |
1927 | return NULL; | |
1928 | ||
0f57dc6a | 1929 | if (!firmware) { |
8b4aec9a | 1930 | /* |
8b4aec9a | 1931 | * If the caller didn't pass in a firmware name then |
0f57dc6a | 1932 | * construct a default name. |
8b4aec9a RT |
1933 | */ |
1934 | name_len = strlen(name) + strlen(template) - 2 + 1; | |
0f57dc6a MR |
1935 | p = kmalloc(name_len, GFP_KERNEL); |
1936 | if (!p) | |
1937 | return NULL; | |
8b4aec9a RT |
1938 | snprintf(p, name_len, template, name); |
1939 | } else { | |
0f57dc6a MR |
1940 | p = kstrdup(firmware, GFP_KERNEL); |
1941 | if (!p) | |
1942 | return NULL; | |
1943 | } | |
1944 | ||
1945 | rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL); | |
1946 | if (!rproc) { | |
1947 | kfree(p); | |
1948 | return NULL; | |
8b4aec9a RT |
1949 | } |
1950 | ||
fb98e2bd BA |
1951 | rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL); |
1952 | if (!rproc->ops) { | |
1953 | kfree(p); | |
1954 | kfree(rproc); | |
1955 | return NULL; | |
1956 | } | |
1957 | ||
8b4aec9a | 1958 | rproc->firmware = p; |
400e64df | 1959 | rproc->name = name; |
400e64df | 1960 | rproc->priv = &rproc[1]; |
ddf71187 | 1961 | rproc->auto_boot = true; |
400e64df | 1962 | |
b5ab5e24 OBC |
1963 | device_initialize(&rproc->dev); |
1964 | rproc->dev.parent = dev; | |
1965 | rproc->dev.type = &rproc_type; | |
2aefbef0 | 1966 | rproc->dev.class = &rproc_class; |
7c89717f | 1967 | rproc->dev.driver_data = rproc; |
b5ab5e24 OBC |
1968 | |
1969 | /* Assign a unique device index and name */ | |
1970 | rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL); | |
1971 | if (rproc->index < 0) { | |
1972 | dev_err(dev, "ida_simple_get failed: %d\n", rproc->index); | |
1973 | put_device(&rproc->dev); | |
1974 | return NULL; | |
1975 | } | |
1976 | ||
1977 | dev_set_name(&rproc->dev, "remoteproc%d", rproc->index); | |
1978 | ||
400e64df OBC |
1979 | atomic_set(&rproc->power, 0); |
1980 | ||
0f21f9cc BA |
1981 | /* Default to ELF loader if no load function is specified */ |
1982 | if (!rproc->ops->load) { | |
1983 | rproc->ops->load = rproc_elf_load_segments; | |
c1d35c1a | 1984 | rproc->ops->parse_fw = rproc_elf_load_rsc_table; |
0f21f9cc BA |
1985 | rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table; |
1986 | rproc->ops->sanity_check = rproc_elf_sanity_check; | |
1987 | rproc->ops->get_boot_addr = rproc_elf_get_boot_addr; | |
1988 | } | |
400e64df OBC |
1989 | |
1990 | mutex_init(&rproc->lock); | |
1991 | ||
7a186941 OBC |
1992 | idr_init(&rproc->notifyids); |
1993 | ||
400e64df OBC |
1994 | INIT_LIST_HEAD(&rproc->carveouts); |
1995 | INIT_LIST_HEAD(&rproc->mappings); | |
1996 | INIT_LIST_HEAD(&rproc->traces); | |
7a186941 | 1997 | INIT_LIST_HEAD(&rproc->rvdevs); |
7bdc9650 | 1998 | INIT_LIST_HEAD(&rproc->subdevs); |
2666ca91 | 1999 | INIT_LIST_HEAD(&rproc->dump_segments); |
400e64df | 2000 | |
8afd519c FGL |
2001 | INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work); |
2002 | ||
400e64df OBC |
2003 | rproc->state = RPROC_OFFLINE; |
2004 | ||
2005 | return rproc; | |
2006 | } | |
2007 | EXPORT_SYMBOL(rproc_alloc); | |
2008 | ||
2009 | /** | |
433c0e04 BA |
2010 | * rproc_free() - unroll rproc_alloc() |
2011 | * @rproc: the remote processor handle | |
2012 | * | |
2013 | * This function decrements the rproc dev refcount. | |
2014 | * | |
2015 | * If no one holds any reference to rproc anymore, then its refcount would | |
2016 | * now drop to zero, and it would be freed. | |
2017 | */ | |
2018 | void rproc_free(struct rproc *rproc) | |
2019 | { | |
2020 | put_device(&rproc->dev); | |
2021 | } | |
2022 | EXPORT_SYMBOL(rproc_free); | |
2023 | ||
2024 | /** | |
2025 | * rproc_put() - release rproc reference | |
400e64df OBC |
2026 | * @rproc: the remote processor handle |
2027 | * | |
c6b5a276 | 2028 | * This function decrements the rproc dev refcount. |
400e64df | 2029 | * |
c6b5a276 OBC |
2030 | * If no one holds any reference to rproc anymore, then its refcount would |
2031 | * now drop to zero, and it would be freed. | |
400e64df | 2032 | */ |
160e7c84 | 2033 | void rproc_put(struct rproc *rproc) |
400e64df | 2034 | { |
fbb6aacb | 2035 | module_put(rproc->dev.parent->driver->owner); |
b5ab5e24 | 2036 | put_device(&rproc->dev); |
400e64df | 2037 | } |
160e7c84 | 2038 | EXPORT_SYMBOL(rproc_put); |
400e64df OBC |
2039 | |
2040 | /** | |
160e7c84 | 2041 | * rproc_del() - unregister a remote processor |
400e64df OBC |
2042 | * @rproc: rproc handle to unregister |
2043 | * | |
400e64df OBC |
2044 | * This function should be called when the platform specific rproc |
2045 | * implementation decides to remove the rproc device. it should | |
160e7c84 | 2046 | * _only_ be called if a previous invocation of rproc_add() |
400e64df OBC |
2047 | * has completed successfully. |
2048 | * | |
160e7c84 | 2049 | * After rproc_del() returns, @rproc isn't freed yet, because |
c6b5a276 | 2050 | * of the outstanding reference created by rproc_alloc. To decrement that |
433c0e04 | 2051 | * one last refcount, one still needs to call rproc_free(). |
400e64df OBC |
2052 | * |
2053 | * Returns 0 on success and -EINVAL if @rproc isn't valid. | |
2054 | */ | |
160e7c84 | 2055 | int rproc_del(struct rproc *rproc) |
400e64df OBC |
2056 | { |
2057 | if (!rproc) | |
2058 | return -EINVAL; | |
2059 | ||
ddf71187 BA |
2060 | /* if rproc is marked always-on, rproc_add() booted it */ |
2061 | /* TODO: make sure this works with rproc->power > 1 */ | |
2062 | if (rproc->auto_boot) | |
2063 | rproc_shutdown(rproc); | |
2064 | ||
2099c77d SJ |
2065 | mutex_lock(&rproc->lock); |
2066 | rproc->state = RPROC_DELETED; | |
2067 | mutex_unlock(&rproc->lock); | |
2068 | ||
b003d45b SJ |
2069 | rproc_delete_debug_dir(rproc); |
2070 | ||
fec47d86 DG |
2071 | /* the rproc is downref'ed as soon as it's removed from the klist */ |
2072 | mutex_lock(&rproc_list_mutex); | |
2073 | list_del(&rproc->node); | |
2074 | mutex_unlock(&rproc_list_mutex); | |
2075 | ||
b5ab5e24 | 2076 | device_del(&rproc->dev); |
400e64df OBC |
2077 | |
2078 | return 0; | |
2079 | } | |
160e7c84 | 2080 | EXPORT_SYMBOL(rproc_del); |
400e64df | 2081 | |
7bdc9650 BA |
2082 | /** |
2083 | * rproc_add_subdev() - add a subdevice to a remoteproc | |
2084 | * @rproc: rproc handle to add the subdevice to | |
2085 | * @subdev: subdev handle to register | |
4902676f BA |
2086 | * |
2087 | * Caller is responsible for populating optional subdevice function pointers. | |
7bdc9650 | 2088 | */ |
4902676f | 2089 | void rproc_add_subdev(struct rproc *rproc, struct rproc_subdev *subdev) |
7bdc9650 | 2090 | { |
7bdc9650 BA |
2091 | list_add_tail(&subdev->node, &rproc->subdevs); |
2092 | } | |
2093 | EXPORT_SYMBOL(rproc_add_subdev); | |
2094 | ||
2095 | /** | |
2096 | * rproc_remove_subdev() - remove a subdevice from a remoteproc | |
2097 | * @rproc: rproc handle to remove the subdevice from | |
2098 | * @subdev: subdev handle, previously registered with rproc_add_subdev() | |
2099 | */ | |
2100 | void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev) | |
2101 | { | |
2102 | list_del(&subdev->node); | |
2103 | } | |
2104 | EXPORT_SYMBOL(rproc_remove_subdev); | |
2105 | ||
7c89717f BA |
2106 | /** |
2107 | * rproc_get_by_child() - acquire rproc handle of @dev's ancestor | |
2108 | * @dev: child device to find ancestor of | |
2109 | * | |
2110 | * Returns the ancestor rproc instance, or NULL if not found. | |
2111 | */ | |
2112 | struct rproc *rproc_get_by_child(struct device *dev) | |
2113 | { | |
2114 | for (dev = dev->parent; dev; dev = dev->parent) { | |
2115 | if (dev->type == &rproc_type) | |
2116 | return dev->driver_data; | |
2117 | } | |
2118 | ||
2119 | return NULL; | |
2120 | } | |
2121 | EXPORT_SYMBOL(rproc_get_by_child); | |
2122 | ||
8afd519c FGL |
2123 | /** |
2124 | * rproc_report_crash() - rproc crash reporter function | |
2125 | * @rproc: remote processor | |
2126 | * @type: crash type | |
2127 | * | |
2128 | * This function must be called every time a crash is detected by the low-level | |
2129 | * drivers implementing a specific remoteproc. This should not be called from a | |
2130 | * non-remoteproc driver. | |
2131 | * | |
2132 | * This function can be called from atomic/interrupt context. | |
2133 | */ | |
2134 | void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type) | |
2135 | { | |
2136 | if (!rproc) { | |
2137 | pr_err("NULL rproc pointer\n"); | |
2138 | return; | |
2139 | } | |
2140 | ||
2141 | dev_err(&rproc->dev, "crash detected in %s: type %s\n", | |
2142 | rproc->name, rproc_crash_to_string(type)); | |
2143 | ||
2144 | /* create a new task to handle the error */ | |
2145 | schedule_work(&rproc->crash_handler); | |
2146 | } | |
2147 | EXPORT_SYMBOL(rproc_report_crash); | |
2148 | ||
400e64df OBC |
2149 | static int __init remoteproc_init(void) |
2150 | { | |
2aefbef0 | 2151 | rproc_init_sysfs(); |
400e64df | 2152 | rproc_init_debugfs(); |
b5ab5e24 | 2153 | |
400e64df OBC |
2154 | return 0; |
2155 | } | |
2156 | module_init(remoteproc_init); | |
2157 | ||
2158 | static void __exit remoteproc_exit(void) | |
2159 | { | |
f42f79af SA |
2160 | ida_destroy(&rproc_dev_index); |
2161 | ||
400e64df | 2162 | rproc_exit_debugfs(); |
2aefbef0 | 2163 | rproc_exit_sysfs(); |
400e64df OBC |
2164 | } |
2165 | module_exit(remoteproc_exit); | |
2166 | ||
2167 | MODULE_LICENSE("GPL v2"); | |
2168 | MODULE_DESCRIPTION("Generic Remote Processor Framework"); |