Commit | Line | Data |
---|---|---|
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> |
086d0872 | 42 | #include <linux/of_reserved_mem.h> |
400e64df OBC |
43 | #include <linux/virtio_ids.h> |
44 | #include <linux/virtio_ring.h> | |
cf59d3e9 | 45 | #include <asm/byteorder.h> |
086d0872 | 46 | #include <linux/platform_device.h> |
400e64df OBC |
47 | |
48 | #include "remoteproc_internal.h" | |
49 | ||
b36de8cf LP |
50 | #define HIGH_BITS_MASK 0xFFFFFFFF00000000ULL |
51 | ||
fec47d86 DG |
52 | static DEFINE_MUTEX(rproc_list_mutex); |
53 | static LIST_HEAD(rproc_list); | |
54 | ||
400e64df | 55 | typedef int (*rproc_handle_resources_t)(struct rproc *rproc, |
fd2c15ec | 56 | struct resource_table *table, int len); |
a2b950ac OBC |
57 | typedef int (*rproc_handle_resource_t)(struct rproc *rproc, |
58 | void *, int offset, int avail); | |
400e64df | 59 | |
c6aed238 LP |
60 | static int rproc_alloc_carveout(struct rproc *rproc, |
61 | struct rproc_mem_entry *mem); | |
62 | static int rproc_release_carveout(struct rproc *rproc, | |
63 | struct rproc_mem_entry *mem); | |
64 | ||
b5ab5e24 OBC |
65 | /* Unique indices for remoteproc devices */ |
66 | static DEFINE_IDA(rproc_dev_index); | |
67 | ||
8afd519c FGL |
68 | static const char * const rproc_crash_names[] = { |
69 | [RPROC_MMUFAULT] = "mmufault", | |
b3d39032 BA |
70 | [RPROC_WATCHDOG] = "watchdog", |
71 | [RPROC_FATAL_ERROR] = "fatal error", | |
8afd519c FGL |
72 | }; |
73 | ||
74 | /* translate rproc_crash_type to string */ | |
75 | static const char *rproc_crash_to_string(enum rproc_crash_type type) | |
76 | { | |
77 | if (type < ARRAY_SIZE(rproc_crash_names)) | |
78 | return rproc_crash_names[type]; | |
b23f7a09 | 79 | return "unknown"; |
8afd519c FGL |
80 | } |
81 | ||
400e64df OBC |
82 | /* |
83 | * This is the IOMMU fault handler we register with the IOMMU API | |
84 | * (when relevant; not all remote processors access memory through | |
85 | * an IOMMU). | |
86 | * | |
87 | * IOMMU core will invoke this handler whenever the remote processor | |
88 | * will try to access an unmapped device address. | |
400e64df OBC |
89 | */ |
90 | static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev, | |
730f84ce | 91 | unsigned long iova, int flags, void *token) |
400e64df | 92 | { |
8afd519c FGL |
93 | struct rproc *rproc = token; |
94 | ||
400e64df OBC |
95 | dev_err(dev, "iommu fault: da 0x%lx flags 0x%x\n", iova, flags); |
96 | ||
8afd519c FGL |
97 | rproc_report_crash(rproc, RPROC_MMUFAULT); |
98 | ||
400e64df OBC |
99 | /* |
100 | * Let the iommu core know we're not really handling this fault; | |
8afd519c | 101 | * we just used it as a recovery trigger. |
400e64df OBC |
102 | */ |
103 | return -ENOSYS; | |
104 | } | |
105 | ||
106 | static int rproc_enable_iommu(struct rproc *rproc) | |
107 | { | |
108 | struct iommu_domain *domain; | |
b5ab5e24 | 109 | struct device *dev = rproc->dev.parent; |
400e64df OBC |
110 | int ret; |
111 | ||
315491e5 SA |
112 | if (!rproc->has_iommu) { |
113 | dev_dbg(dev, "iommu not present\n"); | |
0798e1da | 114 | return 0; |
400e64df OBC |
115 | } |
116 | ||
117 | domain = iommu_domain_alloc(dev->bus); | |
118 | if (!domain) { | |
119 | dev_err(dev, "can't alloc iommu domain\n"); | |
120 | return -ENOMEM; | |
121 | } | |
122 | ||
77ca2332 | 123 | iommu_set_fault_handler(domain, rproc_iommu_fault, rproc); |
400e64df OBC |
124 | |
125 | ret = iommu_attach_device(domain, dev); | |
126 | if (ret) { | |
127 | dev_err(dev, "can't attach iommu device: %d\n", ret); | |
128 | goto free_domain; | |
129 | } | |
130 | ||
131 | rproc->domain = domain; | |
132 | ||
133 | return 0; | |
134 | ||
135 | free_domain: | |
136 | iommu_domain_free(domain); | |
137 | return ret; | |
138 | } | |
139 | ||
140 | static void rproc_disable_iommu(struct rproc *rproc) | |
141 | { | |
142 | struct iommu_domain *domain = rproc->domain; | |
b5ab5e24 | 143 | struct device *dev = rproc->dev.parent; |
400e64df OBC |
144 | |
145 | if (!domain) | |
146 | return; | |
147 | ||
148 | iommu_detach_device(domain, dev); | |
149 | iommu_domain_free(domain); | |
400e64df OBC |
150 | } |
151 | ||
086d0872 | 152 | phys_addr_t rproc_va_to_pa(void *cpu_addr) |
eb30596e LP |
153 | { |
154 | /* | |
155 | * Return physical address according to virtual address location | |
156 | * - in vmalloc: if region ioremapped or defined as dma_alloc_coherent | |
157 | * - in kernel: if region allocated in generic dma memory pool | |
158 | */ | |
159 | if (is_vmalloc_addr(cpu_addr)) { | |
160 | return page_to_phys(vmalloc_to_page(cpu_addr)) + | |
161 | offset_in_page(cpu_addr); | |
162 | } | |
163 | ||
164 | WARN_ON(!virt_addr_valid(cpu_addr)); | |
165 | return virt_to_phys(cpu_addr); | |
166 | } | |
086d0872 | 167 | EXPORT_SYMBOL(rproc_va_to_pa); |
eb30596e | 168 | |
a01f7cd6 SA |
169 | /** |
170 | * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address | |
171 | * @rproc: handle of a remote processor | |
172 | * @da: remoteproc device address to translate | |
173 | * @len: length of the memory region @da is pointing to | |
174 | * | |
400e64df OBC |
175 | * Some remote processors will ask us to allocate them physically contiguous |
176 | * memory regions (which we call "carveouts"), and map them to specific | |
a01f7cd6 SA |
177 | * device addresses (which are hardcoded in the firmware). They may also have |
178 | * dedicated memory regions internal to the processors, and use them either | |
179 | * exclusively or alongside carveouts. | |
400e64df OBC |
180 | * |
181 | * They may then ask us to copy objects into specific device addresses (e.g. | |
182 | * code/data sections) or expose us certain symbols in other device address | |
183 | * (e.g. their trace buffer). | |
184 | * | |
a01f7cd6 SA |
185 | * This function is a helper function with which we can go over the allocated |
186 | * carveouts and translate specific device addresses to kernel virtual addresses | |
187 | * so we can access the referenced memory. This function also allows to perform | |
188 | * translations on the internal remoteproc memory regions through a platform | |
189 | * implementation specific da_to_va ops, if present. | |
190 | * | |
191 | * The function returns a valid kernel address on success or NULL on failure. | |
400e64df OBC |
192 | * |
193 | * Note: phys_to_virt(iommu_iova_to_phys(rproc->domain, da)) will work too, | |
194 | * but only on kernel direct mapped RAM memory. Instead, we're just using | |
a01f7cd6 SA |
195 | * here the output of the DMA API for the carveouts, which should be more |
196 | * correct. | |
400e64df | 197 | */ |
72854fb0 | 198 | void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) |
400e64df OBC |
199 | { |
200 | struct rproc_mem_entry *carveout; | |
201 | void *ptr = NULL; | |
202 | ||
a01f7cd6 SA |
203 | if (rproc->ops->da_to_va) { |
204 | ptr = rproc->ops->da_to_va(rproc, da, len); | |
205 | if (ptr) | |
206 | goto out; | |
207 | } | |
208 | ||
400e64df OBC |
209 | list_for_each_entry(carveout, &rproc->carveouts, node) { |
210 | int offset = da - carveout->da; | |
211 | ||
74457c40 LP |
212 | /* Verify that carveout is allocated */ |
213 | if (!carveout->va) | |
214 | continue; | |
215 | ||
400e64df OBC |
216 | /* try next carveout if da is too small */ |
217 | if (offset < 0) | |
218 | continue; | |
219 | ||
220 | /* try next carveout if da is too large */ | |
221 | if (offset + len > carveout->len) | |
222 | continue; | |
223 | ||
224 | ptr = carveout->va + offset; | |
225 | ||
226 | break; | |
227 | } | |
228 | ||
a01f7cd6 | 229 | out: |
400e64df OBC |
230 | return ptr; |
231 | } | |
4afc89d6 | 232 | EXPORT_SYMBOL(rproc_da_to_va); |
400e64df | 233 | |
b0019ccd LP |
234 | /** |
235 | * rproc_find_carveout_by_name() - lookup the carveout region by a name | |
236 | * @rproc: handle of a remote processor | |
237 | * @name,..: carveout name to find (standard printf format) | |
238 | * | |
239 | * Platform driver has the capability to register some pre-allacoted carveout | |
240 | * (physically contiguous memory regions) before rproc firmware loading and | |
241 | * associated resource table analysis. These regions may be dedicated memory | |
242 | * regions internal to the coprocessor or specified DDR region with specific | |
243 | * attributes | |
244 | * | |
245 | * This function is a helper function with which we can go over the | |
246 | * allocated carveouts and return associated region characteristics like | |
247 | * coprocessor address, length or processor virtual address. | |
248 | * | |
249 | * Return: a valid pointer on carveout entry on success or NULL on failure. | |
250 | */ | |
251 | struct rproc_mem_entry * | |
252 | rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...) | |
253 | { | |
254 | va_list args; | |
255 | char _name[32]; | |
256 | struct rproc_mem_entry *carveout, *mem = NULL; | |
257 | ||
258 | if (!name) | |
259 | return NULL; | |
260 | ||
261 | va_start(args, name); | |
262 | vsnprintf(_name, sizeof(_name), name, args); | |
263 | va_end(args); | |
264 | ||
265 | list_for_each_entry(carveout, &rproc->carveouts, node) { | |
266 | /* Compare carveout and requested names */ | |
267 | if (!strcmp(carveout->name, _name)) { | |
268 | mem = carveout; | |
269 | break; | |
270 | } | |
271 | } | |
272 | ||
273 | return mem; | |
274 | } | |
275 | ||
c874bf59 LP |
276 | /** |
277 | * rproc_check_carveout_da() - Check specified carveout da configuration | |
278 | * @rproc: handle of a remote processor | |
279 | * @mem: pointer on carveout to check | |
280 | * @da: area device address | |
281 | * @len: associated area size | |
282 | * | |
283 | * This function is a helper function to verify requested device area (couple | |
284 | * da, len) is part of specified carevout. | |
285 | * | |
286 | * Return: 0 if carveout match request else -ENOMEM | |
287 | */ | |
288 | int rproc_check_carveout_da(struct rproc *rproc, struct rproc_mem_entry *mem, | |
289 | u32 da, u32 len) | |
290 | { | |
291 | struct device *dev = &rproc->dev; | |
292 | int delta = 0; | |
293 | ||
294 | /* Check requested resource length */ | |
295 | if (len > mem->len) { | |
296 | dev_err(dev, "Registered carveout doesn't fit len request\n"); | |
297 | return -ENOMEM; | |
298 | } | |
299 | ||
300 | if (da != FW_RSC_ADDR_ANY && mem->da == FW_RSC_ADDR_ANY) { | |
301 | /* Update existing carveout da */ | |
302 | mem->da = da; | |
303 | } else if (da != FW_RSC_ADDR_ANY && mem->da != FW_RSC_ADDR_ANY) { | |
304 | delta = da - mem->da; | |
305 | ||
306 | /* Check requested resource belongs to registered carveout */ | |
307 | if (delta < 0) { | |
308 | dev_err(dev, | |
309 | "Registered carveout doesn't fit da request\n"); | |
310 | return -ENOMEM; | |
311 | } | |
312 | ||
313 | if (delta + len > mem->len) { | |
314 | dev_err(dev, | |
315 | "Registered carveout doesn't fit len request\n"); | |
316 | return -ENOMEM; | |
317 | } | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
6db20ea8 | 323 | int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) |
400e64df | 324 | { |
7a186941 | 325 | struct rproc *rproc = rvdev->rproc; |
b5ab5e24 | 326 | struct device *dev = &rproc->dev; |
6db20ea8 | 327 | struct rproc_vring *rvring = &rvdev->vring[i]; |
c0d63157 | 328 | struct fw_rsc_vdev *rsc; |
7a186941 | 329 | int ret, size, notifyid; |
c6aed238 | 330 | struct rproc_mem_entry *mem; |
400e64df | 331 | |
7a186941 | 332 | /* actual size of vring (in bytes) */ |
6db20ea8 | 333 | size = PAGE_ALIGN(vring_size(rvring->len, rvring->align)); |
7a186941 | 334 | |
c6aed238 LP |
335 | rsc = (void *)rproc->table_ptr + rvdev->rsc_offset; |
336 | ||
337 | /* Search for pre-registered carveout */ | |
338 | mem = rproc_find_carveout_by_name(rproc, "vdev%dvring%d", rvdev->index, | |
339 | i); | |
340 | if (mem) { | |
341 | if (rproc_check_carveout_da(rproc, mem, rsc->vring[i].da, size)) | |
342 | return -ENOMEM; | |
343 | } else { | |
344 | /* Register carveout in in list */ | |
345 | mem = rproc_mem_entry_init(dev, 0, 0, size, rsc->vring[i].da, | |
346 | rproc_alloc_carveout, | |
347 | rproc_release_carveout, | |
348 | "vdev%dvring%d", | |
349 | rvdev->index, i); | |
350 | if (!mem) { | |
351 | dev_err(dev, "Can't allocate memory entry structure\n"); | |
352 | return -ENOMEM; | |
353 | } | |
354 | ||
355 | rproc_add_carveout(rproc, mem); | |
400e64df OBC |
356 | } |
357 | ||
6db20ea8 OBC |
358 | /* |
359 | * Assign an rproc-wide unique index for this vring | |
360 | * TODO: assign a notifyid for rvdev updates as well | |
6db20ea8 OBC |
361 | * TODO: support predefined notifyids (via resource table) |
362 | */ | |
15fc6110 | 363 | ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL); |
b39599b7 | 364 | if (ret < 0) { |
15fc6110 | 365 | dev_err(dev, "idr_alloc failed: %d\n", ret); |
7a186941 OBC |
366 | return ret; |
367 | } | |
15fc6110 | 368 | notifyid = ret; |
400e64df | 369 | |
48f18f89 BA |
370 | /* Potentially bump max_notifyid */ |
371 | if (notifyid > rproc->max_notifyid) | |
372 | rproc->max_notifyid = notifyid; | |
373 | ||
6db20ea8 | 374 | rvring->notifyid = notifyid; |
400e64df | 375 | |
c6aed238 | 376 | /* Let the rproc know the notifyid of this vring.*/ |
c0d63157 | 377 | rsc->vring[i].notifyid = notifyid; |
400e64df OBC |
378 | return 0; |
379 | } | |
380 | ||
6db20ea8 OBC |
381 | static int |
382 | rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i) | |
7a186941 OBC |
383 | { |
384 | struct rproc *rproc = rvdev->rproc; | |
b5ab5e24 | 385 | struct device *dev = &rproc->dev; |
6db20ea8 OBC |
386 | struct fw_rsc_vdev_vring *vring = &rsc->vring[i]; |
387 | struct rproc_vring *rvring = &rvdev->vring[i]; | |
7a186941 | 388 | |
9d7814a9 | 389 | dev_dbg(dev, "vdev rsc: vring%d: da 0x%x, qsz %d, align %d\n", |
730f84ce | 390 | i, vring->da, vring->num, vring->align); |
7a186941 | 391 | |
6db20ea8 OBC |
392 | /* verify queue size and vring alignment are sane */ |
393 | if (!vring->num || !vring->align) { | |
394 | dev_err(dev, "invalid qsz (%d) or alignment (%d)\n", | |
730f84ce | 395 | vring->num, vring->align); |
6db20ea8 | 396 | return -EINVAL; |
7a186941 | 397 | } |
6db20ea8 OBC |
398 | |
399 | rvring->len = vring->num; | |
400 | rvring->align = vring->align; | |
401 | rvring->rvdev = rvdev; | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | void rproc_free_vring(struct rproc_vring *rvring) | |
407 | { | |
6db20ea8 | 408 | struct rproc *rproc = rvring->rvdev->rproc; |
c0d63157 SB |
409 | int idx = rvring->rvdev->vring - rvring; |
410 | struct fw_rsc_vdev *rsc; | |
6db20ea8 | 411 | |
6db20ea8 | 412 | idr_remove(&rproc->notifyids, rvring->notifyid); |
099a3f33 | 413 | |
c0d63157 SB |
414 | /* reset resource entry info */ |
415 | rsc = (void *)rproc->table_ptr + rvring->rvdev->rsc_offset; | |
416 | rsc->vring[idx].da = 0; | |
417 | rsc->vring[idx].notifyid = -1; | |
7a186941 OBC |
418 | } |
419 | ||
6f8b0373 | 420 | static int rproc_vdev_do_start(struct rproc_subdev *subdev) |
f5bcb353 BA |
421 | { |
422 | struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev); | |
423 | ||
424 | return rproc_add_virtio_dev(rvdev, rvdev->id); | |
425 | } | |
426 | ||
6f8b0373 | 427 | static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed) |
f5bcb353 BA |
428 | { |
429 | struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev); | |
d4c036fe | 430 | int ret; |
f5bcb353 | 431 | |
d4c036fe LP |
432 | ret = device_for_each_child(&rvdev->dev, NULL, rproc_remove_virtio_dev); |
433 | if (ret) | |
434 | dev_warn(&rvdev->dev, "can't remove vdev child device: %d\n", ret); | |
f5bcb353 BA |
435 | } |
436 | ||
086d0872 LP |
437 | /** |
438 | * rproc_rvdev_release() - release the existence of a rvdev | |
439 | * | |
440 | * @dev: the subdevice's dev | |
441 | */ | |
442 | static void rproc_rvdev_release(struct device *dev) | |
443 | { | |
444 | struct rproc_vdev *rvdev = container_of(dev, struct rproc_vdev, dev); | |
445 | ||
446 | of_reserved_mem_device_release(dev); | |
447 | ||
448 | kfree(rvdev); | |
449 | } | |
450 | ||
400e64df | 451 | /** |
fd2c15ec | 452 | * rproc_handle_vdev() - handle a vdev fw resource |
400e64df OBC |
453 | * @rproc: the remote processor |
454 | * @rsc: the vring resource descriptor | |
fd2c15ec | 455 | * @avail: size of available data (for sanity checking the image) |
400e64df | 456 | * |
7a186941 OBC |
457 | * This resource entry requests the host to statically register a virtio |
458 | * device (vdev), and setup everything needed to support it. It contains | |
459 | * everything needed to make it possible: the virtio device id, virtio | |
460 | * device features, vrings information, virtio config space, etc... | |
461 | * | |
462 | * Before registering the vdev, the vrings are allocated from non-cacheable | |
463 | * physically contiguous memory. Currently we only support two vrings per | |
464 | * remote processor (temporary limitation). We might also want to consider | |
465 | * doing the vring allocation only later when ->find_vqs() is invoked, and | |
466 | * then release them upon ->del_vqs(). | |
467 | * | |
468 | * Note: @da is currently not really handled correctly: we dynamically | |
469 | * allocate it using the DMA API, ignoring requested hard coded addresses, | |
470 | * and we don't take care of any required IOMMU programming. This is all | |
471 | * going to be taken care of when the generic iommu-based DMA API will be | |
472 | * merged. Meanwhile, statically-addressed iommu-based firmware images should | |
473 | * use RSC_DEVMEM resource entries to map their required @da to the physical | |
474 | * address of their base CMA region (ouch, hacky!). | |
400e64df OBC |
475 | * |
476 | * Returns 0 on success, or an appropriate error code otherwise | |
477 | */ | |
fd2c15ec | 478 | static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc, |
730f84ce | 479 | int offset, int avail) |
400e64df | 480 | { |
b5ab5e24 | 481 | struct device *dev = &rproc->dev; |
7a186941 OBC |
482 | struct rproc_vdev *rvdev; |
483 | int i, ret; | |
086d0872 | 484 | char name[16]; |
400e64df | 485 | |
fd2c15ec OBC |
486 | /* make sure resource isn't truncated */ |
487 | if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring) | |
488 | + rsc->config_len > avail) { | |
b5ab5e24 | 489 | dev_err(dev, "vdev rsc is truncated\n"); |
400e64df OBC |
490 | return -EINVAL; |
491 | } | |
492 | ||
fd2c15ec OBC |
493 | /* make sure reserved bytes are zeroes */ |
494 | if (rsc->reserved[0] || rsc->reserved[1]) { | |
495 | dev_err(dev, "vdev rsc has non zero reserved bytes\n"); | |
400e64df OBC |
496 | return -EINVAL; |
497 | } | |
498 | ||
9d7814a9 | 499 | dev_dbg(dev, "vdev rsc: id %d, dfeatures 0x%x, cfg len %d, %d vrings\n", |
fd2c15ec OBC |
500 | rsc->id, rsc->dfeatures, rsc->config_len, rsc->num_of_vrings); |
501 | ||
7a186941 OBC |
502 | /* we currently support only two vrings per rvdev */ |
503 | if (rsc->num_of_vrings > ARRAY_SIZE(rvdev->vring)) { | |
fd2c15ec | 504 | dev_err(dev, "too many vrings: %d\n", rsc->num_of_vrings); |
400e64df OBC |
505 | return -EINVAL; |
506 | } | |
507 | ||
899585ad | 508 | rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL); |
7a186941 OBC |
509 | if (!rvdev) |
510 | return -ENOMEM; | |
400e64df | 511 | |
aab8d802 BA |
512 | kref_init(&rvdev->refcount); |
513 | ||
f5bcb353 | 514 | rvdev->id = rsc->id; |
7a186941 | 515 | rvdev->rproc = rproc; |
c6aed238 | 516 | rvdev->index = rproc->nb_vdev++; |
400e64df | 517 | |
086d0872 LP |
518 | /* Initialise vdev subdevice */ |
519 | snprintf(name, sizeof(name), "vdev%dbuffer", rvdev->index); | |
520 | rvdev->dev.parent = rproc->dev.parent; | |
521 | rvdev->dev.release = rproc_rvdev_release; | |
522 | dev_set_name(&rvdev->dev, "%s#%s", dev_name(rvdev->dev.parent), name); | |
523 | dev_set_drvdata(&rvdev->dev, rvdev); | |
524 | ||
525 | ret = device_register(&rvdev->dev); | |
526 | if (ret) { | |
527 | put_device(&rvdev->dev); | |
528 | return ret; | |
529 | } | |
530 | /* Make device dma capable by inheriting from parent's capabilities */ | |
531 | set_dma_ops(&rvdev->dev, get_dma_ops(rproc->dev.parent)); | |
532 | ||
533 | ret = dma_coerce_mask_and_coherent(&rvdev->dev, | |
534 | dma_get_mask(rproc->dev.parent)); | |
535 | if (ret) { | |
536 | dev_warn(dev, | |
537 | "Failed to set DMA mask %llx. Trying to continue... %x\n", | |
538 | dma_get_mask(rproc->dev.parent), ret); | |
539 | } | |
540 | ||
6db20ea8 | 541 | /* parse the vrings */ |
7a186941 | 542 | for (i = 0; i < rsc->num_of_vrings; i++) { |
6db20ea8 | 543 | ret = rproc_parse_vring(rvdev, rsc, i); |
7a186941 | 544 | if (ret) |
6db20ea8 | 545 | goto free_rvdev; |
7a186941 | 546 | } |
400e64df | 547 | |
a2b950ac OBC |
548 | /* remember the resource offset*/ |
549 | rvdev->rsc_offset = offset; | |
fd2c15ec | 550 | |
a863af5d BA |
551 | /* allocate the vring resources */ |
552 | for (i = 0; i < rsc->num_of_vrings; i++) { | |
553 | ret = rproc_alloc_vring(rvdev, i); | |
554 | if (ret) | |
555 | goto unwind_vring_allocations; | |
556 | } | |
557 | ||
7a186941 | 558 | list_add_tail(&rvdev->node, &rproc->rvdevs); |
fd2c15ec | 559 | |
6f8b0373 AE |
560 | rvdev->subdev.start = rproc_vdev_do_start; |
561 | rvdev->subdev.stop = rproc_vdev_do_stop; | |
4902676f BA |
562 | |
563 | rproc_add_subdev(rproc, &rvdev->subdev); | |
400e64df OBC |
564 | |
565 | return 0; | |
7a186941 | 566 | |
a863af5d BA |
567 | unwind_vring_allocations: |
568 | for (i--; i >= 0; i--) | |
569 | rproc_free_vring(&rvdev->vring[i]); | |
6db20ea8 | 570 | free_rvdev: |
086d0872 | 571 | device_unregister(&rvdev->dev); |
7a186941 | 572 | return ret; |
400e64df OBC |
573 | } |
574 | ||
aab8d802 BA |
575 | void rproc_vdev_release(struct kref *ref) |
576 | { | |
577 | struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount); | |
a863af5d | 578 | struct rproc_vring *rvring; |
f5bcb353 | 579 | struct rproc *rproc = rvdev->rproc; |
a863af5d BA |
580 | int id; |
581 | ||
582 | for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) { | |
583 | rvring = &rvdev->vring[id]; | |
a863af5d BA |
584 | rproc_free_vring(rvring); |
585 | } | |
aab8d802 | 586 | |
f5bcb353 | 587 | rproc_remove_subdev(rproc, &rvdev->subdev); |
aab8d802 | 588 | list_del(&rvdev->node); |
086d0872 | 589 | device_unregister(&rvdev->dev); |
aab8d802 BA |
590 | } |
591 | ||
400e64df OBC |
592 | /** |
593 | * rproc_handle_trace() - handle a shared trace buffer resource | |
594 | * @rproc: the remote processor | |
595 | * @rsc: the trace resource descriptor | |
fd2c15ec | 596 | * @avail: size of available data (for sanity checking the image) |
400e64df OBC |
597 | * |
598 | * In case the remote processor dumps trace logs into memory, | |
599 | * export it via debugfs. | |
600 | * | |
601 | * Currently, the 'da' member of @rsc should contain the device address | |
602 | * where the remote processor is dumping the traces. Later we could also | |
603 | * support dynamically allocating this address using the generic | |
604 | * DMA API (but currently there isn't a use case for that). | |
605 | * | |
606 | * Returns 0 on success, or an appropriate error code otherwise | |
607 | */ | |
fd2c15ec | 608 | static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, |
730f84ce | 609 | int offset, int avail) |
400e64df | 610 | { |
a987e6b9 | 611 | struct rproc_debug_trace *trace; |
b5ab5e24 | 612 | struct device *dev = &rproc->dev; |
400e64df OBC |
613 | char name[15]; |
614 | ||
fd2c15ec | 615 | if (sizeof(*rsc) > avail) { |
b5ab5e24 | 616 | dev_err(dev, "trace rsc is truncated\n"); |
fd2c15ec OBC |
617 | return -EINVAL; |
618 | } | |
619 | ||
620 | /* make sure reserved bytes are zeroes */ | |
621 | if (rsc->reserved) { | |
622 | dev_err(dev, "trace rsc has non zero reserved bytes\n"); | |
623 | return -EINVAL; | |
624 | } | |
625 | ||
400e64df | 626 | trace = kzalloc(sizeof(*trace), GFP_KERNEL); |
172e6ab1 | 627 | if (!trace) |
400e64df | 628 | return -ENOMEM; |
400e64df OBC |
629 | |
630 | /* set the trace buffer dma properties */ | |
a987e6b9 LP |
631 | trace->trace_mem.len = rsc->len; |
632 | trace->trace_mem.da = rsc->da; | |
633 | ||
634 | /* set pointer on rproc device */ | |
635 | trace->rproc = rproc; | |
400e64df OBC |
636 | |
637 | /* make sure snprintf always null terminates, even if truncating */ | |
638 | snprintf(name, sizeof(name), "trace%d", rproc->num_traces); | |
639 | ||
640 | /* create the debugfs entry */ | |
a987e6b9 LP |
641 | trace->tfile = rproc_create_trace_file(name, rproc, trace); |
642 | if (!trace->tfile) { | |
400e64df OBC |
643 | kfree(trace); |
644 | return -EINVAL; | |
645 | } | |
646 | ||
647 | list_add_tail(&trace->node, &rproc->traces); | |
648 | ||
649 | rproc->num_traces++; | |
650 | ||
a987e6b9 LP |
651 | dev_dbg(dev, "%s added: da 0x%x, len 0x%x\n", |
652 | name, rsc->da, rsc->len); | |
400e64df OBC |
653 | |
654 | return 0; | |
655 | } | |
656 | ||
657 | /** | |
658 | * rproc_handle_devmem() - handle devmem resource entry | |
659 | * @rproc: remote processor handle | |
660 | * @rsc: the devmem resource entry | |
fd2c15ec | 661 | * @avail: size of available data (for sanity checking the image) |
400e64df OBC |
662 | * |
663 | * Remote processors commonly need to access certain on-chip peripherals. | |
664 | * | |
665 | * Some of these remote processors access memory via an iommu device, | |
666 | * and might require us to configure their iommu before they can access | |
667 | * the on-chip peripherals they need. | |
668 | * | |
669 | * This resource entry is a request to map such a peripheral device. | |
670 | * | |
671 | * These devmem entries will contain the physical address of the device in | |
672 | * the 'pa' member. If a specific device address is expected, then 'da' will | |
673 | * contain it (currently this is the only use case supported). 'len' will | |
674 | * contain the size of the physical region we need to map. | |
675 | * | |
676 | * Currently we just "trust" those devmem entries to contain valid physical | |
677 | * addresses, but this is going to change: we want the implementations to | |
678 | * tell us ranges of physical addresses the firmware is allowed to request, | |
679 | * and not allow firmwares to request access to physical addresses that | |
680 | * are outside those ranges. | |
681 | */ | |
fd2c15ec | 682 | static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc, |
730f84ce | 683 | int offset, int avail) |
400e64df OBC |
684 | { |
685 | struct rproc_mem_entry *mapping; | |
b5ab5e24 | 686 | struct device *dev = &rproc->dev; |
400e64df OBC |
687 | int ret; |
688 | ||
689 | /* no point in handling this resource without a valid iommu domain */ | |
690 | if (!rproc->domain) | |
691 | return -EINVAL; | |
692 | ||
fd2c15ec | 693 | if (sizeof(*rsc) > avail) { |
b5ab5e24 | 694 | dev_err(dev, "devmem rsc is truncated\n"); |
fd2c15ec OBC |
695 | return -EINVAL; |
696 | } | |
697 | ||
698 | /* make sure reserved bytes are zeroes */ | |
699 | if (rsc->reserved) { | |
b5ab5e24 | 700 | dev_err(dev, "devmem rsc has non zero reserved bytes\n"); |
fd2c15ec OBC |
701 | return -EINVAL; |
702 | } | |
703 | ||
400e64df | 704 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); |
172e6ab1 | 705 | if (!mapping) |
400e64df | 706 | return -ENOMEM; |
400e64df OBC |
707 | |
708 | ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags); | |
709 | if (ret) { | |
b5ab5e24 | 710 | dev_err(dev, "failed to map devmem: %d\n", ret); |
400e64df OBC |
711 | goto out; |
712 | } | |
713 | ||
714 | /* | |
715 | * We'll need this info later when we'll want to unmap everything | |
716 | * (e.g. on shutdown). | |
717 | * | |
718 | * We can't trust the remote processor not to change the resource | |
719 | * table, so we must maintain this info independently. | |
720 | */ | |
721 | mapping->da = rsc->da; | |
722 | mapping->len = rsc->len; | |
723 | list_add_tail(&mapping->node, &rproc->mappings); | |
724 | ||
b5ab5e24 | 725 | dev_dbg(dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n", |
730f84ce | 726 | rsc->pa, rsc->da, rsc->len); |
400e64df OBC |
727 | |
728 | return 0; | |
729 | ||
730 | out: | |
731 | kfree(mapping); | |
732 | return ret; | |
733 | } | |
734 | ||
f2e74abf | 735 | /** |
d7c51706 | 736 | * rproc_alloc_carveout() - allocated specified carveout |
f2e74abf | 737 | * @rproc: rproc handle |
d7c51706 | 738 | * @mem: the memory entry to allocate |
400e64df | 739 | * |
d7c51706 LP |
740 | * This function allocate specified memory entry @mem using |
741 | * dma_alloc_coherent() as default allocator | |
400e64df | 742 | */ |
d7c51706 LP |
743 | static int rproc_alloc_carveout(struct rproc *rproc, |
744 | struct rproc_mem_entry *mem) | |
400e64df | 745 | { |
d7c51706 | 746 | struct rproc_mem_entry *mapping = NULL; |
b5ab5e24 | 747 | struct device *dev = &rproc->dev; |
400e64df OBC |
748 | dma_addr_t dma; |
749 | void *va; | |
750 | int ret; | |
751 | ||
d7c51706 | 752 | va = dma_alloc_coherent(dev->parent, mem->len, &dma, GFP_KERNEL); |
400e64df | 753 | if (!va) { |
9c219b23 | 754 | dev_err(dev->parent, |
d7c51706 | 755 | "failed to allocate dma memory: len 0x%x\n", mem->len); |
72029c90 | 756 | return -ENOMEM; |
400e64df OBC |
757 | } |
758 | ||
276ec993 | 759 | dev_dbg(dev, "carveout va %pK, dma %pad, len 0x%x\n", |
d7c51706 | 760 | va, &dma, mem->len); |
400e64df | 761 | |
60f849a5 LP |
762 | if (mem->da != FW_RSC_ADDR_ANY && !rproc->domain) { |
763 | /* | |
764 | * Check requested da is equal to dma address | |
765 | * and print a warn message in case of missalignment. | |
766 | * Don't stop rproc_start sequence as coprocessor may | |
767 | * build pa to da translation on its side. | |
768 | */ | |
769 | if (mem->da != (u32)dma) | |
770 | dev_warn(dev->parent, | |
771 | "Allocated carveout doesn't fit device address request\n"); | |
772 | } | |
773 | ||
400e64df OBC |
774 | /* |
775 | * Ok, this is non-standard. | |
776 | * | |
777 | * Sometimes we can't rely on the generic iommu-based DMA API | |
778 | * to dynamically allocate the device address and then set the IOMMU | |
779 | * tables accordingly, because some remote processors might | |
780 | * _require_ us to use hard coded device addresses that their | |
781 | * firmware was compiled with. | |
782 | * | |
783 | * In this case, we must use the IOMMU API directly and map | |
784 | * the memory to the device address as expected by the remote | |
785 | * processor. | |
786 | * | |
787 | * Obviously such remote processor devices should not be configured | |
788 | * to use the iommu-based DMA API: we expect 'dma' to contain the | |
789 | * physical address in this case. | |
790 | */ | |
60f849a5 | 791 | if (mem->da != FW_RSC_ADDR_ANY && rproc->domain) { |
7168d914 DC |
792 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); |
793 | if (!mapping) { | |
7168d914 DC |
794 | ret = -ENOMEM; |
795 | goto dma_free; | |
796 | } | |
797 | ||
d7c51706 LP |
798 | ret = iommu_map(rproc->domain, mem->da, dma, mem->len, |
799 | mem->flags); | |
400e64df OBC |
800 | if (ret) { |
801 | dev_err(dev, "iommu_map failed: %d\n", ret); | |
7168d914 | 802 | goto free_mapping; |
400e64df OBC |
803 | } |
804 | ||
805 | /* | |
806 | * We'll need this info later when we'll want to unmap | |
807 | * everything (e.g. on shutdown). | |
808 | * | |
809 | * We can't trust the remote processor not to change the | |
810 | * resource table, so we must maintain this info independently. | |
811 | */ | |
d7c51706 LP |
812 | mapping->da = mem->da; |
813 | mapping->len = mem->len; | |
400e64df OBC |
814 | list_add_tail(&mapping->node, &rproc->mappings); |
815 | ||
b605ed8b | 816 | dev_dbg(dev, "carveout mapped 0x%x to %pad\n", |
d7c51706 | 817 | mem->da, &dma); |
60f849a5 LP |
818 | } |
819 | ||
820 | if (mem->da == FW_RSC_ADDR_ANY) { | |
b36de8cf LP |
821 | /* Update device address as undefined by requester */ |
822 | if ((u64)dma & HIGH_BITS_MASK) | |
823 | dev_warn(dev, "DMA address cast in 32bit to fit resource table format\n"); | |
824 | ||
d7c51706 | 825 | mem->da = (u32)dma; |
400e64df OBC |
826 | } |
827 | ||
80137b40 | 828 | mem->dma = dma; |
d7c51706 | 829 | mem->va = va; |
400e64df OBC |
830 | |
831 | return 0; | |
832 | ||
7168d914 DC |
833 | free_mapping: |
834 | kfree(mapping); | |
400e64df | 835 | dma_free: |
d7c51706 | 836 | dma_free_coherent(dev->parent, mem->len, va, dma); |
400e64df OBC |
837 | return ret; |
838 | } | |
839 | ||
d7c51706 LP |
840 | /** |
841 | * rproc_release_carveout() - release acquired carveout | |
842 | * @rproc: rproc handle | |
843 | * @mem: the memory entry to release | |
844 | * | |
845 | * This function releases specified memory entry @mem allocated via | |
846 | * rproc_alloc_carveout() function by @rproc. | |
847 | */ | |
848 | static int rproc_release_carveout(struct rproc *rproc, | |
849 | struct rproc_mem_entry *mem) | |
850 | { | |
851 | struct device *dev = &rproc->dev; | |
852 | ||
853 | /* clean up carveout allocations */ | |
854 | dma_free_coherent(dev->parent, mem->len, mem->va, mem->dma); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | /** | |
859 | * rproc_handle_carveout() - handle phys contig memory allocation requests | |
860 | * @rproc: rproc handle | |
861 | * @rsc: the resource entry | |
862 | * @avail: size of available data (for image validation) | |
863 | * | |
864 | * This function will handle firmware requests for allocation of physically | |
865 | * contiguous memory regions. | |
866 | * | |
867 | * These request entries should come first in the firmware's resource table, | |
868 | * as other firmware entries might request placing other data objects inside | |
869 | * these memory regions (e.g. data/code segments, trace resource entries, ...). | |
870 | * | |
871 | * Allocating memory this way helps utilizing the reserved physical memory | |
872 | * (e.g. CMA) more efficiently, and also minimizes the number of TLB entries | |
873 | * needed to map it (in case @rproc is using an IOMMU). Reducing the TLB | |
874 | * pressure is important; it may have a substantial impact on performance. | |
875 | */ | |
876 | static int rproc_handle_carveout(struct rproc *rproc, | |
877 | struct fw_rsc_carveout *rsc, | |
878 | int offset, int avail) | |
879 | { | |
880 | struct rproc_mem_entry *carveout; | |
881 | struct device *dev = &rproc->dev; | |
882 | ||
883 | if (sizeof(*rsc) > avail) { | |
884 | dev_err(dev, "carveout rsc is truncated\n"); | |
885 | return -EINVAL; | |
886 | } | |
887 | ||
888 | /* make sure reserved bytes are zeroes */ | |
889 | if (rsc->reserved) { | |
890 | dev_err(dev, "carveout rsc has non zero reserved bytes\n"); | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | dev_dbg(dev, "carveout rsc: name: %s, da 0x%x, pa 0x%x, len 0x%x, flags 0x%x\n", | |
895 | rsc->name, rsc->da, rsc->pa, rsc->len, rsc->flags); | |
896 | ||
ffa5f9c8 LP |
897 | /* |
898 | * Check carveout rsc already part of a registered carveout, | |
899 | * Search by name, then check the da and length | |
900 | */ | |
901 | carveout = rproc_find_carveout_by_name(rproc, rsc->name); | |
902 | ||
903 | if (carveout) { | |
904 | if (carveout->rsc_offset != FW_RSC_ADDR_ANY) { | |
905 | dev_err(dev, | |
906 | "Carveout already associated to resource table\n"); | |
907 | return -ENOMEM; | |
908 | } | |
909 | ||
910 | if (rproc_check_carveout_da(rproc, carveout, rsc->da, rsc->len)) | |
911 | return -ENOMEM; | |
912 | ||
913 | /* Update memory carveout with resource table info */ | |
914 | carveout->rsc_offset = offset; | |
915 | carveout->flags = rsc->flags; | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
d7c51706 LP |
920 | /* Register carveout in in list */ |
921 | carveout = rproc_mem_entry_init(dev, 0, 0, rsc->len, rsc->da, | |
922 | rproc_alloc_carveout, | |
923 | rproc_release_carveout, rsc->name); | |
924 | if (!carveout) { | |
925 | dev_err(dev, "Can't allocate memory entry structure\n"); | |
926 | return -ENOMEM; | |
927 | } | |
928 | ||
929 | carveout->flags = rsc->flags; | |
930 | carveout->rsc_offset = offset; | |
931 | rproc_add_carveout(rproc, carveout); | |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
15c0b025 LP |
936 | /** |
937 | * rproc_add_carveout() - register an allocated carveout region | |
938 | * @rproc: rproc handle | |
939 | * @mem: memory entry to register | |
940 | * | |
941 | * This function registers specified memory entry in @rproc carveouts list. | |
942 | * Specified carveout should have been allocated before registering. | |
943 | */ | |
944 | void rproc_add_carveout(struct rproc *rproc, struct rproc_mem_entry *mem) | |
945 | { | |
946 | list_add_tail(&mem->node, &rproc->carveouts); | |
947 | } | |
948 | EXPORT_SYMBOL(rproc_add_carveout); | |
949 | ||
72029c90 LP |
950 | /** |
951 | * rproc_mem_entry_init() - allocate and initialize rproc_mem_entry struct | |
952 | * @dev: pointer on device struct | |
953 | * @va: virtual address | |
954 | * @dma: dma address | |
955 | * @len: memory carveout length | |
956 | * @da: device address | |
a9f6fe0d LP |
957 | * @alloc: memory carveout allocation function |
958 | * @release: memory carveout release function | |
72029c90 LP |
959 | * @name: carveout name |
960 | * | |
961 | * This function allocates a rproc_mem_entry struct and fill it with parameters | |
962 | * provided by client. | |
963 | */ | |
964 | struct rproc_mem_entry * | |
965 | rproc_mem_entry_init(struct device *dev, | |
966 | void *va, dma_addr_t dma, int len, u32 da, | |
d7c51706 | 967 | int (*alloc)(struct rproc *, struct rproc_mem_entry *), |
72029c90 LP |
968 | int (*release)(struct rproc *, struct rproc_mem_entry *), |
969 | const char *name, ...) | |
970 | { | |
971 | struct rproc_mem_entry *mem; | |
972 | va_list args; | |
973 | ||
974 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); | |
975 | if (!mem) | |
976 | return mem; | |
977 | ||
978 | mem->va = va; | |
979 | mem->dma = dma; | |
980 | mem->da = da; | |
981 | mem->len = len; | |
d7c51706 | 982 | mem->alloc = alloc; |
72029c90 | 983 | mem->release = release; |
d7c51706 | 984 | mem->rsc_offset = FW_RSC_ADDR_ANY; |
1429cca1 | 985 | mem->of_resm_idx = -1; |
72029c90 LP |
986 | |
987 | va_start(args, name); | |
988 | vsnprintf(mem->name, sizeof(mem->name), name, args); | |
989 | va_end(args); | |
990 | ||
991 | return mem; | |
992 | } | |
993 | EXPORT_SYMBOL(rproc_mem_entry_init); | |
994 | ||
1429cca1 LP |
995 | /** |
996 | * rproc_of_resm_mem_entry_init() - allocate and initialize rproc_mem_entry struct | |
997 | * from a reserved memory phandle | |
998 | * @dev: pointer on device struct | |
999 | * @of_resm_idx: reserved memory phandle index in "memory-region" | |
1000 | * @len: memory carveout length | |
1001 | * @da: device address | |
1002 | * @name: carveout name | |
1003 | * | |
1004 | * This function allocates a rproc_mem_entry struct and fill it with parameters | |
1005 | * provided by client. | |
1006 | */ | |
1007 | struct rproc_mem_entry * | |
1008 | rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, int len, | |
1009 | u32 da, const char *name, ...) | |
1010 | { | |
1011 | struct rproc_mem_entry *mem; | |
1012 | va_list args; | |
1013 | ||
1014 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); | |
1015 | if (!mem) | |
1016 | return mem; | |
1017 | ||
1018 | mem->da = da; | |
1019 | mem->len = len; | |
1020 | mem->rsc_offset = FW_RSC_ADDR_ANY; | |
1021 | mem->of_resm_idx = of_resm_idx; | |
1022 | ||
1023 | va_start(args, name); | |
1024 | vsnprintf(mem->name, sizeof(mem->name), name, args); | |
1025 | va_end(args); | |
1026 | ||
1027 | return mem; | |
1028 | } | |
1029 | EXPORT_SYMBOL(rproc_of_resm_mem_entry_init); | |
1030 | ||
72029c90 | 1031 | /** |
e12bc14b OBC |
1032 | * A lookup table for resource handlers. The indices are defined in |
1033 | * enum fw_resource_type. | |
1034 | */ | |
232fcdbb | 1035 | static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = { |
fd2c15ec OBC |
1036 | [RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout, |
1037 | [RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem, | |
1038 | [RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace, | |
232fcdbb SB |
1039 | [RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev, |
1040 | }; | |
1041 | ||
400e64df | 1042 | /* handle firmware resource entries before booting the remote processor */ |
a4b24c75 | 1043 | static int rproc_handle_resources(struct rproc *rproc, |
232fcdbb | 1044 | rproc_handle_resource_t handlers[RSC_LAST]) |
400e64df | 1045 | { |
b5ab5e24 | 1046 | struct device *dev = &rproc->dev; |
e12bc14b | 1047 | rproc_handle_resource_t handler; |
fd2c15ec OBC |
1048 | int ret = 0, i; |
1049 | ||
d4bb86f2 BA |
1050 | if (!rproc->table_ptr) |
1051 | return 0; | |
1052 | ||
a2b950ac OBC |
1053 | for (i = 0; i < rproc->table_ptr->num; i++) { |
1054 | int offset = rproc->table_ptr->offset[i]; | |
1055 | struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset; | |
a4b24c75 | 1056 | int avail = rproc->table_sz - offset - sizeof(*hdr); |
fd2c15ec OBC |
1057 | void *rsc = (void *)hdr + sizeof(*hdr); |
1058 | ||
1059 | /* make sure table isn't truncated */ | |
1060 | if (avail < 0) { | |
1061 | dev_err(dev, "rsc table is truncated\n"); | |
1062 | return -EINVAL; | |
1063 | } | |
400e64df | 1064 | |
fd2c15ec | 1065 | dev_dbg(dev, "rsc: type %d\n", hdr->type); |
400e64df | 1066 | |
fd2c15ec OBC |
1067 | if (hdr->type >= RSC_LAST) { |
1068 | dev_warn(dev, "unsupported resource %d\n", hdr->type); | |
e12bc14b | 1069 | continue; |
400e64df OBC |
1070 | } |
1071 | ||
232fcdbb | 1072 | handler = handlers[hdr->type]; |
e12bc14b OBC |
1073 | if (!handler) |
1074 | continue; | |
1075 | ||
a2b950ac | 1076 | ret = handler(rproc, rsc, offset + sizeof(*hdr), avail); |
7a186941 | 1077 | if (ret) |
400e64df | 1078 | break; |
fd2c15ec | 1079 | } |
400e64df OBC |
1080 | |
1081 | return ret; | |
1082 | } | |
1083 | ||
c455daa4 BA |
1084 | static int rproc_prepare_subdevices(struct rproc *rproc) |
1085 | { | |
1086 | struct rproc_subdev *subdev; | |
1087 | int ret; | |
1088 | ||
1089 | list_for_each_entry(subdev, &rproc->subdevs, node) { | |
1090 | if (subdev->prepare) { | |
1091 | ret = subdev->prepare(subdev); | |
1092 | if (ret) | |
1093 | goto unroll_preparation; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return 0; | |
1098 | ||
1099 | unroll_preparation: | |
1100 | list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) { | |
1101 | if (subdev->unprepare) | |
1102 | subdev->unprepare(subdev); | |
1103 | } | |
1104 | ||
1105 | return ret; | |
1106 | } | |
1107 | ||
618fcff3 | 1108 | static int rproc_start_subdevices(struct rproc *rproc) |
7bdc9650 BA |
1109 | { |
1110 | struct rproc_subdev *subdev; | |
1111 | int ret; | |
1112 | ||
1113 | list_for_each_entry(subdev, &rproc->subdevs, node) { | |
be37b1e0 BA |
1114 | if (subdev->start) { |
1115 | ret = subdev->start(subdev); | |
1116 | if (ret) | |
1117 | goto unroll_registration; | |
1118 | } | |
7bdc9650 BA |
1119 | } |
1120 | ||
1121 | return 0; | |
1122 | ||
1123 | unroll_registration: | |
be37b1e0 BA |
1124 | list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) { |
1125 | if (subdev->stop) | |
1126 | subdev->stop(subdev, true); | |
1127 | } | |
7bdc9650 BA |
1128 | |
1129 | return ret; | |
1130 | } | |
1131 | ||
618fcff3 | 1132 | static void rproc_stop_subdevices(struct rproc *rproc, bool crashed) |
7bdc9650 BA |
1133 | { |
1134 | struct rproc_subdev *subdev; | |
1135 | ||
be37b1e0 BA |
1136 | list_for_each_entry_reverse(subdev, &rproc->subdevs, node) { |
1137 | if (subdev->stop) | |
1138 | subdev->stop(subdev, crashed); | |
1139 | } | |
7bdc9650 BA |
1140 | } |
1141 | ||
c455daa4 BA |
1142 | static void rproc_unprepare_subdevices(struct rproc *rproc) |
1143 | { | |
1144 | struct rproc_subdev *subdev; | |
1145 | ||
1146 | list_for_each_entry_reverse(subdev, &rproc->subdevs, node) { | |
1147 | if (subdev->unprepare) | |
1148 | subdev->unprepare(subdev); | |
1149 | } | |
1150 | } | |
1151 | ||
d7c51706 LP |
1152 | /** |
1153 | * rproc_alloc_registered_carveouts() - allocate all carveouts registered | |
1154 | * in the list | |
1155 | * @rproc: the remote processor handle | |
1156 | * | |
1157 | * This function parses registered carveout list, performs allocation | |
1158 | * if alloc() ops registered and updates resource table information | |
1159 | * if rsc_offset set. | |
1160 | * | |
1161 | * Return: 0 on success | |
1162 | */ | |
1163 | static int rproc_alloc_registered_carveouts(struct rproc *rproc) | |
1164 | { | |
1165 | struct rproc_mem_entry *entry, *tmp; | |
1166 | struct fw_rsc_carveout *rsc; | |
1167 | struct device *dev = &rproc->dev; | |
b36de8cf | 1168 | u64 pa; |
d7c51706 LP |
1169 | int ret; |
1170 | ||
1171 | list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { | |
1172 | if (entry->alloc) { | |
1173 | ret = entry->alloc(rproc, entry); | |
1174 | if (ret) { | |
1175 | dev_err(dev, "Unable to allocate carveout %s: %d\n", | |
1176 | entry->name, ret); | |
1177 | return -ENOMEM; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | if (entry->rsc_offset != FW_RSC_ADDR_ANY) { | |
1182 | /* update resource table */ | |
1183 | rsc = (void *)rproc->table_ptr + entry->rsc_offset; | |
1184 | ||
1185 | /* | |
1186 | * Some remote processors might need to know the pa | |
1187 | * even though they are behind an IOMMU. E.g., OMAP4's | |
1188 | * remote M3 processor needs this so it can control | |
1189 | * on-chip hardware accelerators that are not behind | |
1190 | * the IOMMU, and therefor must know the pa. | |
1191 | * | |
1192 | * Generally we don't want to expose physical addresses | |
1193 | * if we don't have to (remote processors are generally | |
1194 | * _not_ trusted), so we might want to do this only for | |
1195 | * remote processor that _must_ have this (e.g. OMAP4's | |
1196 | * dual M3 subsystem). | |
1197 | * | |
1198 | * Non-IOMMU processors might also want to have this info. | |
1199 | * In this case, the device address and the physical address | |
1200 | * are the same. | |
1201 | */ | |
ffa5f9c8 LP |
1202 | |
1203 | /* Use va if defined else dma to generate pa */ | |
d7c51706 | 1204 | if (entry->va) |
b36de8cf | 1205 | pa = (u64)rproc_va_to_pa(entry->va); |
ffa5f9c8 | 1206 | else |
b36de8cf LP |
1207 | pa = (u64)entry->dma; |
1208 | ||
1209 | if (((u64)pa) & HIGH_BITS_MASK) | |
1210 | dev_warn(dev, | |
1211 | "Physical address cast in 32bit to fit resource table format\n"); | |
ffa5f9c8 | 1212 | |
b36de8cf | 1213 | rsc->pa = (u32)pa; |
ffa5f9c8 LP |
1214 | rsc->da = entry->da; |
1215 | rsc->len = entry->len; | |
d7c51706 LP |
1216 | } |
1217 | } | |
1218 | ||
1219 | return 0; | |
1220 | } | |
1221 | ||
2666ca91 SJ |
1222 | /** |
1223 | * rproc_coredump_cleanup() - clean up dump_segments list | |
1224 | * @rproc: the remote processor handle | |
1225 | */ | |
1226 | static void rproc_coredump_cleanup(struct rproc *rproc) | |
1227 | { | |
1228 | struct rproc_dump_segment *entry, *tmp; | |
1229 | ||
1230 | list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) { | |
1231 | list_del(&entry->node); | |
1232 | kfree(entry); | |
1233 | } | |
1234 | } | |
1235 | ||
400e64df OBC |
1236 | /** |
1237 | * rproc_resource_cleanup() - clean up and free all acquired resources | |
1238 | * @rproc: rproc handle | |
1239 | * | |
1240 | * This function will free all resources acquired for @rproc, and it | |
7a186941 | 1241 | * is called whenever @rproc either shuts down or fails to boot. |
400e64df OBC |
1242 | */ |
1243 | static void rproc_resource_cleanup(struct rproc *rproc) | |
1244 | { | |
1245 | struct rproc_mem_entry *entry, *tmp; | |
a987e6b9 | 1246 | struct rproc_debug_trace *trace, *ttmp; |
d81fb32f | 1247 | struct rproc_vdev *rvdev, *rvtmp; |
b5ab5e24 | 1248 | struct device *dev = &rproc->dev; |
400e64df OBC |
1249 | |
1250 | /* clean up debugfs trace entries */ | |
a987e6b9 LP |
1251 | list_for_each_entry_safe(trace, ttmp, &rproc->traces, node) { |
1252 | rproc_remove_trace_file(trace->tfile); | |
400e64df | 1253 | rproc->num_traces--; |
a987e6b9 LP |
1254 | list_del(&trace->node); |
1255 | kfree(trace); | |
400e64df OBC |
1256 | } |
1257 | ||
400e64df OBC |
1258 | /* clean up iommu mapping entries */ |
1259 | list_for_each_entry_safe(entry, tmp, &rproc->mappings, node) { | |
1260 | size_t unmapped; | |
1261 | ||
1262 | unmapped = iommu_unmap(rproc->domain, entry->da, entry->len); | |
1263 | if (unmapped != entry->len) { | |
1264 | /* nothing much to do besides complaining */ | |
e981f6d4 | 1265 | dev_err(dev, "failed to unmap %u/%zu\n", entry->len, |
730f84ce | 1266 | unmapped); |
400e64df OBC |
1267 | } |
1268 | ||
1269 | list_del(&entry->node); | |
1270 | kfree(entry); | |
1271 | } | |
b6356a01 SA |
1272 | |
1273 | /* clean up carveout allocations */ | |
1274 | list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { | |
f2e74abf LP |
1275 | if (entry->release) |
1276 | entry->release(rproc, entry); | |
b6356a01 SA |
1277 | list_del(&entry->node); |
1278 | kfree(entry); | |
1279 | } | |
d81fb32f BA |
1280 | |
1281 | /* clean up remote vdev entries */ | |
f5bcb353 | 1282 | list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node) |
2b45cef5 | 1283 | kref_put(&rvdev->refcount, rproc_vdev_release); |
2666ca91 SJ |
1284 | |
1285 | rproc_coredump_cleanup(rproc); | |
400e64df OBC |
1286 | } |
1287 | ||
1efa30d0 SJ |
1288 | static int rproc_start(struct rproc *rproc, const struct firmware *fw) |
1289 | { | |
a4b24c75 | 1290 | struct resource_table *loaded_table; |
1efa30d0 | 1291 | struct device *dev = &rproc->dev; |
a4b24c75 | 1292 | int ret; |
1efa30d0 SJ |
1293 | |
1294 | /* load the ELF segments to memory */ | |
1295 | ret = rproc_load_segments(rproc, fw); | |
1296 | if (ret) { | |
1297 | dev_err(dev, "Failed to load program segments: %d\n", ret); | |
1298 | return ret; | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * The starting device has been given the rproc->cached_table as the | |
1303 | * resource table. The address of the vring along with the other | |
1304 | * allocated resources (carveouts etc) is stored in cached_table. | |
1305 | * In order to pass this information to the remote device we must copy | |
1306 | * this information to device memory. We also update the table_ptr so | |
1307 | * that any subsequent changes will be applied to the loaded version. | |
1308 | */ | |
1309 | loaded_table = rproc_find_loaded_rsc_table(rproc, fw); | |
1310 | if (loaded_table) { | |
a4b24c75 | 1311 | memcpy(loaded_table, rproc->cached_table, rproc->table_sz); |
1efa30d0 SJ |
1312 | rproc->table_ptr = loaded_table; |
1313 | } | |
1314 | ||
c455daa4 BA |
1315 | ret = rproc_prepare_subdevices(rproc); |
1316 | if (ret) { | |
1317 | dev_err(dev, "failed to prepare subdevices for %s: %d\n", | |
1318 | rproc->name, ret); | |
f68d51bd | 1319 | goto reset_table_ptr; |
c455daa4 BA |
1320 | } |
1321 | ||
1efa30d0 SJ |
1322 | /* power up the remote processor */ |
1323 | ret = rproc->ops->start(rproc); | |
1324 | if (ret) { | |
1325 | dev_err(dev, "can't start rproc %s: %d\n", rproc->name, ret); | |
c455daa4 | 1326 | goto unprepare_subdevices; |
1efa30d0 SJ |
1327 | } |
1328 | ||
618fcff3 BA |
1329 | /* Start any subdevices for the remote processor */ |
1330 | ret = rproc_start_subdevices(rproc); | |
1efa30d0 SJ |
1331 | if (ret) { |
1332 | dev_err(dev, "failed to probe subdevices for %s: %d\n", | |
1333 | rproc->name, ret); | |
c455daa4 | 1334 | goto stop_rproc; |
1efa30d0 SJ |
1335 | } |
1336 | ||
1337 | rproc->state = RPROC_RUNNING; | |
1338 | ||
1339 | dev_info(dev, "remote processor %s is now up\n", rproc->name); | |
1340 | ||
1341 | return 0; | |
c455daa4 BA |
1342 | |
1343 | stop_rproc: | |
1344 | rproc->ops->stop(rproc); | |
c455daa4 BA |
1345 | unprepare_subdevices: |
1346 | rproc_unprepare_subdevices(rproc); | |
f68d51bd SA |
1347 | reset_table_ptr: |
1348 | rproc->table_ptr = rproc->cached_table; | |
c455daa4 BA |
1349 | |
1350 | return ret; | |
1efa30d0 SJ |
1351 | } |
1352 | ||
400e64df OBC |
1353 | /* |
1354 | * take a firmware and boot a remote processor with it. | |
1355 | */ | |
1356 | static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) | |
1357 | { | |
b5ab5e24 | 1358 | struct device *dev = &rproc->dev; |
400e64df | 1359 | const char *name = rproc->firmware; |
58b64090 | 1360 | int ret; |
400e64df OBC |
1361 | |
1362 | ret = rproc_fw_sanity_check(rproc, fw); | |
1363 | if (ret) | |
1364 | return ret; | |
1365 | ||
e981f6d4 | 1366 | dev_info(dev, "Booting fw image %s, size %zd\n", name, fw->size); |
400e64df OBC |
1367 | |
1368 | /* | |
1369 | * if enabling an IOMMU isn't relevant for this rproc, this is | |
1370 | * just a nop | |
1371 | */ | |
1372 | ret = rproc_enable_iommu(rproc); | |
1373 | if (ret) { | |
1374 | dev_err(dev, "can't enable iommu: %d\n", ret); | |
1375 | return ret; | |
1376 | } | |
1377 | ||
3e5f9eb5 | 1378 | rproc->bootaddr = rproc_get_boot_addr(rproc, fw); |
988d204c | 1379 | |
c1d35c1a BA |
1380 | /* Load resource table, core dump segment list etc from the firmware */ |
1381 | ret = rproc_parse_fw(rproc, fw); | |
58b64090 BA |
1382 | if (ret) |
1383 | goto disable_iommu; | |
a0c10687 | 1384 | |
b35d7afc BA |
1385 | /* reset max_notifyid */ |
1386 | rproc->max_notifyid = -1; | |
1387 | ||
c6aed238 LP |
1388 | /* reset handled vdev */ |
1389 | rproc->nb_vdev = 0; | |
1390 | ||
400e64df | 1391 | /* handle fw resources which are required to boot rproc */ |
a4b24c75 | 1392 | ret = rproc_handle_resources(rproc, rproc_loading_handlers); |
400e64df OBC |
1393 | if (ret) { |
1394 | dev_err(dev, "Failed to process resources: %d\n", ret); | |
229b85a6 | 1395 | goto clean_up_resources; |
400e64df OBC |
1396 | } |
1397 | ||
d7c51706 LP |
1398 | /* Allocate carveout resources associated to rproc */ |
1399 | ret = rproc_alloc_registered_carveouts(rproc); | |
1400 | if (ret) { | |
1401 | dev_err(dev, "Failed to allocate associated carveouts: %d\n", | |
1402 | ret); | |
1403 | goto clean_up_resources; | |
1404 | } | |
1405 | ||
1efa30d0 SJ |
1406 | ret = rproc_start(rproc, fw); |
1407 | if (ret) | |
229b85a6 | 1408 | goto clean_up_resources; |
400e64df OBC |
1409 | |
1410 | return 0; | |
1411 | ||
229b85a6 BA |
1412 | clean_up_resources: |
1413 | rproc_resource_cleanup(rproc); | |
a0c10687 BA |
1414 | kfree(rproc->cached_table); |
1415 | rproc->cached_table = NULL; | |
988d204c | 1416 | rproc->table_ptr = NULL; |
58b64090 | 1417 | disable_iommu: |
400e64df OBC |
1418 | rproc_disable_iommu(rproc); |
1419 | return ret; | |
1420 | } | |
1421 | ||
1422 | /* | |
5e6533f7 | 1423 | * take a firmware and boot it up. |
400e64df OBC |
1424 | * |
1425 | * Note: this function is called asynchronously upon registration of the | |
1426 | * remote processor (so we must wait until it completes before we try | |
1427 | * to unregister the device. one other option is just to use kref here, | |
1428 | * that might be cleaner). | |
1429 | */ | |
5e6533f7 | 1430 | static void rproc_auto_boot_callback(const struct firmware *fw, void *context) |
400e64df OBC |
1431 | { |
1432 | struct rproc *rproc = context; | |
a2b950ac | 1433 | |
7a20c64d | 1434 | rproc_boot(rproc); |
ddf71187 | 1435 | |
3cc6e787 | 1436 | release_firmware(fw); |
400e64df OBC |
1437 | } |
1438 | ||
5e6533f7 | 1439 | static int rproc_trigger_auto_boot(struct rproc *rproc) |
70b85ef8 FGL |
1440 | { |
1441 | int ret; | |
1442 | ||
70b85ef8 | 1443 | /* |
70b85ef8 FGL |
1444 | * We're initiating an asynchronous firmware loading, so we can |
1445 | * be built-in kernel code, without hanging the boot process. | |
1446 | */ | |
1447 | ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG, | |
1448 | rproc->firmware, &rproc->dev, GFP_KERNEL, | |
5e6533f7 | 1449 | rproc, rproc_auto_boot_callback); |
2099c77d | 1450 | if (ret < 0) |
70b85ef8 | 1451 | dev_err(&rproc->dev, "request_firmware_nowait err: %d\n", ret); |
70b85ef8 FGL |
1452 | |
1453 | return ret; | |
1454 | } | |
1455 | ||
880f5b38 | 1456 | static int rproc_stop(struct rproc *rproc, bool crashed) |
1efa30d0 SJ |
1457 | { |
1458 | struct device *dev = &rproc->dev; | |
1459 | int ret; | |
1460 | ||
618fcff3 BA |
1461 | /* Stop any subdevices for the remote processor */ |
1462 | rproc_stop_subdevices(rproc, crashed); | |
1efa30d0 | 1463 | |
0a8b81cb BA |
1464 | /* the installed resource table is no longer accessible */ |
1465 | rproc->table_ptr = rproc->cached_table; | |
1466 | ||
1efa30d0 SJ |
1467 | /* power off the remote processor */ |
1468 | ret = rproc->ops->stop(rproc); | |
1469 | if (ret) { | |
1470 | dev_err(dev, "can't stop rproc: %d\n", ret); | |
1471 | return ret; | |
1472 | } | |
1473 | ||
c455daa4 BA |
1474 | rproc_unprepare_subdevices(rproc); |
1475 | ||
1efa30d0 SJ |
1476 | rproc->state = RPROC_OFFLINE; |
1477 | ||
1478 | dev_info(dev, "stopped remote processor %s\n", rproc->name); | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | ||
2666ca91 SJ |
1483 | /** |
1484 | * rproc_coredump_add_segment() - add segment of device memory to coredump | |
1485 | * @rproc: handle of a remote processor | |
1486 | * @da: device address | |
1487 | * @size: size of segment | |
1488 | * | |
1489 | * Add device memory to the list of segments to be included in a coredump for | |
1490 | * the remoteproc. | |
1491 | * | |
1492 | * Return: 0 on success, negative errno on error. | |
1493 | */ | |
1494 | int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size) | |
1495 | { | |
1496 | struct rproc_dump_segment *segment; | |
1497 | ||
1498 | segment = kzalloc(sizeof(*segment), GFP_KERNEL); | |
1499 | if (!segment) | |
1500 | return -ENOMEM; | |
1501 | ||
1502 | segment->da = da; | |
1503 | segment->size = size; | |
1504 | ||
1505 | list_add_tail(&segment->node, &rproc->dump_segments); | |
1506 | ||
1507 | return 0; | |
1508 | } | |
1509 | EXPORT_SYMBOL(rproc_coredump_add_segment); | |
1510 | ||
ab8f873b SS |
1511 | /** |
1512 | * rproc_coredump_add_custom_segment() - add custom coredump segment | |
1513 | * @rproc: handle of a remote processor | |
1514 | * @da: device address | |
1515 | * @size: size of segment | |
1516 | * @dumpfn: custom dump function called for each segment during coredump | |
1517 | * @priv: private data | |
1518 | * | |
1519 | * Add device memory to the list of segments to be included in the coredump | |
1520 | * and associate the segment with the given custom dump function and private | |
1521 | * data. | |
1522 | * | |
1523 | * Return: 0 on success, negative errno on error. | |
1524 | */ | |
1525 | int rproc_coredump_add_custom_segment(struct rproc *rproc, | |
1526 | dma_addr_t da, size_t size, | |
1527 | void (*dumpfn)(struct rproc *rproc, | |
1528 | struct rproc_dump_segment *segment, | |
1529 | void *dest), | |
1530 | void *priv) | |
1531 | { | |
1532 | struct rproc_dump_segment *segment; | |
1533 | ||
1534 | segment = kzalloc(sizeof(*segment), GFP_KERNEL); | |
1535 | if (!segment) | |
1536 | return -ENOMEM; | |
1537 | ||
1538 | segment->da = da; | |
1539 | segment->size = size; | |
1540 | segment->priv = priv; | |
1541 | segment->dump = dumpfn; | |
1542 | ||
1543 | list_add_tail(&segment->node, &rproc->dump_segments); | |
1544 | ||
1545 | return 0; | |
1546 | } | |
1547 | EXPORT_SYMBOL(rproc_coredump_add_custom_segment); | |
1548 | ||
2666ca91 SJ |
1549 | /** |
1550 | * rproc_coredump() - perform coredump | |
1551 | * @rproc: rproc handle | |
1552 | * | |
1553 | * This function will generate an ELF header for the registered segments | |
1554 | * and create a devcoredump device associated with rproc. | |
1555 | */ | |
1556 | static void rproc_coredump(struct rproc *rproc) | |
1557 | { | |
1558 | struct rproc_dump_segment *segment; | |
1559 | struct elf32_phdr *phdr; | |
1560 | struct elf32_hdr *ehdr; | |
1561 | size_t data_size; | |
1562 | size_t offset; | |
1563 | void *data; | |
1564 | void *ptr; | |
1565 | int phnum = 0; | |
1566 | ||
1567 | if (list_empty(&rproc->dump_segments)) | |
1568 | return; | |
1569 | ||
1570 | data_size = sizeof(*ehdr); | |
1571 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
1572 | data_size += sizeof(*phdr) + segment->size; | |
1573 | ||
1574 | phnum++; | |
1575 | } | |
1576 | ||
1577 | data = vmalloc(data_size); | |
1578 | if (!data) | |
1579 | return; | |
1580 | ||
1581 | ehdr = data; | |
1582 | ||
1583 | memset(ehdr, 0, sizeof(*ehdr)); | |
1584 | memcpy(ehdr->e_ident, ELFMAG, SELFMAG); | |
1585 | ehdr->e_ident[EI_CLASS] = ELFCLASS32; | |
1586 | ehdr->e_ident[EI_DATA] = ELFDATA2LSB; | |
1587 | ehdr->e_ident[EI_VERSION] = EV_CURRENT; | |
1588 | ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; | |
1589 | ehdr->e_type = ET_CORE; | |
1590 | ehdr->e_machine = EM_NONE; | |
1591 | ehdr->e_version = EV_CURRENT; | |
1592 | ehdr->e_entry = rproc->bootaddr; | |
1593 | ehdr->e_phoff = sizeof(*ehdr); | |
1594 | ehdr->e_ehsize = sizeof(*ehdr); | |
1595 | ehdr->e_phentsize = sizeof(*phdr); | |
1596 | ehdr->e_phnum = phnum; | |
1597 | ||
1598 | phdr = data + ehdr->e_phoff; | |
1599 | offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; | |
1600 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
1601 | memset(phdr, 0, sizeof(*phdr)); | |
1602 | phdr->p_type = PT_LOAD; | |
1603 | phdr->p_offset = offset; | |
1604 | phdr->p_vaddr = segment->da; | |
1605 | phdr->p_paddr = segment->da; | |
1606 | phdr->p_filesz = segment->size; | |
1607 | phdr->p_memsz = segment->size; | |
1608 | phdr->p_flags = PF_R | PF_W | PF_X; | |
1609 | phdr->p_align = 0; | |
1610 | ||
3952105d SS |
1611 | if (segment->dump) { |
1612 | segment->dump(rproc, segment, data + offset); | |
2666ca91 | 1613 | } else { |
3952105d SS |
1614 | ptr = rproc_da_to_va(rproc, segment->da, segment->size); |
1615 | if (!ptr) { | |
1616 | dev_err(&rproc->dev, | |
1617 | "invalid coredump segment (%pad, %zu)\n", | |
1618 | &segment->da, segment->size); | |
1619 | memset(data + offset, 0xff, segment->size); | |
1620 | } else { | |
1621 | memcpy(data + offset, ptr, segment->size); | |
1622 | } | |
2666ca91 SJ |
1623 | } |
1624 | ||
1625 | offset += phdr->p_filesz; | |
1626 | phdr++; | |
1627 | } | |
1628 | ||
1629 | dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); | |
1630 | } | |
1631 | ||
70b85ef8 FGL |
1632 | /** |
1633 | * rproc_trigger_recovery() - recover a remoteproc | |
1634 | * @rproc: the remote processor | |
1635 | * | |
56324d7a | 1636 | * The recovery is done by resetting all the virtio devices, that way all the |
70b85ef8 FGL |
1637 | * rpmsg drivers will be reseted along with the remote processor making the |
1638 | * remoteproc functional again. | |
1639 | * | |
1640 | * This function can sleep, so it cannot be called from atomic context. | |
1641 | */ | |
1642 | int rproc_trigger_recovery(struct rproc *rproc) | |
1643 | { | |
7e83cab8 SJ |
1644 | const struct firmware *firmware_p; |
1645 | struct device *dev = &rproc->dev; | |
1646 | int ret; | |
1647 | ||
1648 | dev_err(dev, "recovering %s\n", rproc->name); | |
70b85ef8 | 1649 | |
7e83cab8 SJ |
1650 | ret = mutex_lock_interruptible(&rproc->lock); |
1651 | if (ret) | |
1652 | return ret; | |
1653 | ||
fcd58037 | 1654 | ret = rproc_stop(rproc, true); |
7e83cab8 SJ |
1655 | if (ret) |
1656 | goto unlock_mutex; | |
ddf71187 | 1657 | |
2666ca91 SJ |
1658 | /* generate coredump */ |
1659 | rproc_coredump(rproc); | |
1660 | ||
7e83cab8 SJ |
1661 | /* load firmware */ |
1662 | ret = request_firmware(&firmware_p, rproc->firmware, dev); | |
1663 | if (ret < 0) { | |
1664 | dev_err(dev, "request_firmware failed: %d\n", ret); | |
1665 | goto unlock_mutex; | |
1666 | } | |
ddf71187 | 1667 | |
7e83cab8 SJ |
1668 | /* boot the remote processor up again */ |
1669 | ret = rproc_start(rproc, firmware_p); | |
1670 | ||
1671 | release_firmware(firmware_p); | |
1672 | ||
1673 | unlock_mutex: | |
1674 | mutex_unlock(&rproc->lock); | |
1675 | return ret; | |
70b85ef8 FGL |
1676 | } |
1677 | ||
8afd519c FGL |
1678 | /** |
1679 | * rproc_crash_handler_work() - handle a crash | |
1680 | * | |
1681 | * This function needs to handle everything related to a crash, like cpu | |
1682 | * registers and stack dump, information to help to debug the fatal error, etc. | |
1683 | */ | |
1684 | static void rproc_crash_handler_work(struct work_struct *work) | |
1685 | { | |
1686 | struct rproc *rproc = container_of(work, struct rproc, crash_handler); | |
1687 | struct device *dev = &rproc->dev; | |
1688 | ||
1689 | dev_dbg(dev, "enter %s\n", __func__); | |
1690 | ||
1691 | mutex_lock(&rproc->lock); | |
1692 | ||
1693 | if (rproc->state == RPROC_CRASHED || rproc->state == RPROC_OFFLINE) { | |
1694 | /* handle only the first crash detected */ | |
1695 | mutex_unlock(&rproc->lock); | |
1696 | return; | |
1697 | } | |
1698 | ||
1699 | rproc->state = RPROC_CRASHED; | |
1700 | dev_err(dev, "handling crash #%u in %s\n", ++rproc->crash_cnt, | |
1701 | rproc->name); | |
1702 | ||
1703 | mutex_unlock(&rproc->lock); | |
1704 | ||
2e37abb8 FGL |
1705 | if (!rproc->recovery_disabled) |
1706 | rproc_trigger_recovery(rproc); | |
8afd519c FGL |
1707 | } |
1708 | ||
400e64df | 1709 | /** |
1b0ef906 | 1710 | * rproc_boot() - boot a remote processor |
400e64df OBC |
1711 | * @rproc: handle of a remote processor |
1712 | * | |
1713 | * Boot a remote processor (i.e. load its firmware, power it on, ...). | |
1714 | * | |
1715 | * If the remote processor is already powered on, this function immediately | |
1716 | * returns (successfully). | |
1717 | * | |
1718 | * Returns 0 on success, and an appropriate error value otherwise. | |
1719 | */ | |
1b0ef906 | 1720 | int rproc_boot(struct rproc *rproc) |
400e64df OBC |
1721 | { |
1722 | const struct firmware *firmware_p; | |
1723 | struct device *dev; | |
1724 | int ret; | |
1725 | ||
1726 | if (!rproc) { | |
1727 | pr_err("invalid rproc handle\n"); | |
1728 | return -EINVAL; | |
1729 | } | |
1730 | ||
b5ab5e24 | 1731 | dev = &rproc->dev; |
400e64df OBC |
1732 | |
1733 | ret = mutex_lock_interruptible(&rproc->lock); | |
1734 | if (ret) { | |
1735 | dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret); | |
1736 | return ret; | |
1737 | } | |
1738 | ||
2099c77d SJ |
1739 | if (rproc->state == RPROC_DELETED) { |
1740 | ret = -ENODEV; | |
1741 | dev_err(dev, "can't boot deleted rproc %s\n", rproc->name); | |
1742 | goto unlock_mutex; | |
1743 | } | |
1744 | ||
400e64df OBC |
1745 | /* skip the boot process if rproc is already powered up */ |
1746 | if (atomic_inc_return(&rproc->power) > 1) { | |
1747 | ret = 0; | |
1748 | goto unlock_mutex; | |
1749 | } | |
1750 | ||
1751 | dev_info(dev, "powering up %s\n", rproc->name); | |
1752 | ||
1753 | /* load firmware */ | |
1754 | ret = request_firmware(&firmware_p, rproc->firmware, dev); | |
1755 | if (ret < 0) { | |
1756 | dev_err(dev, "request_firmware failed: %d\n", ret); | |
1757 | goto downref_rproc; | |
1758 | } | |
1759 | ||
1760 | ret = rproc_fw_boot(rproc, firmware_p); | |
1761 | ||
1762 | release_firmware(firmware_p); | |
1763 | ||
1764 | downref_rproc: | |
fbb6aacb | 1765 | if (ret) |
400e64df | 1766 | atomic_dec(&rproc->power); |
400e64df OBC |
1767 | unlock_mutex: |
1768 | mutex_unlock(&rproc->lock); | |
1769 | return ret; | |
1770 | } | |
1771 | EXPORT_SYMBOL(rproc_boot); | |
1772 | ||
1773 | /** | |
1774 | * rproc_shutdown() - power off the remote processor | |
1775 | * @rproc: the remote processor | |
1776 | * | |
1777 | * Power off a remote processor (previously booted with rproc_boot()). | |
1778 | * | |
1779 | * In case @rproc is still being used by an additional user(s), then | |
1780 | * this function will just decrement the power refcount and exit, | |
1781 | * without really powering off the device. | |
1782 | * | |
1783 | * Every call to rproc_boot() must (eventually) be accompanied by a call | |
1784 | * to rproc_shutdown(). Calling rproc_shutdown() redundantly is a bug. | |
1785 | * | |
1786 | * Notes: | |
1787 | * - we're not decrementing the rproc's refcount, only the power refcount. | |
1788 | * which means that the @rproc handle stays valid even after rproc_shutdown() | |
1789 | * returns, and users can still use it with a subsequent rproc_boot(), if | |
1790 | * needed. | |
400e64df OBC |
1791 | */ |
1792 | void rproc_shutdown(struct rproc *rproc) | |
1793 | { | |
b5ab5e24 | 1794 | struct device *dev = &rproc->dev; |
400e64df OBC |
1795 | int ret; |
1796 | ||
1797 | ret = mutex_lock_interruptible(&rproc->lock); | |
1798 | if (ret) { | |
1799 | dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret); | |
1800 | return; | |
1801 | } | |
1802 | ||
1803 | /* if the remote proc is still needed, bail out */ | |
1804 | if (!atomic_dec_and_test(&rproc->power)) | |
1805 | goto out; | |
1806 | ||
fcd58037 | 1807 | ret = rproc_stop(rproc, false); |
400e64df OBC |
1808 | if (ret) { |
1809 | atomic_inc(&rproc->power); | |
400e64df OBC |
1810 | goto out; |
1811 | } | |
1812 | ||
1813 | /* clean up all acquired resources */ | |
1814 | rproc_resource_cleanup(rproc); | |
1815 | ||
1816 | rproc_disable_iommu(rproc); | |
1817 | ||
988d204c | 1818 | /* Free the copy of the resource table */ |
a0c10687 BA |
1819 | kfree(rproc->cached_table); |
1820 | rproc->cached_table = NULL; | |
988d204c | 1821 | rproc->table_ptr = NULL; |
400e64df OBC |
1822 | out: |
1823 | mutex_unlock(&rproc->lock); | |
400e64df OBC |
1824 | } |
1825 | EXPORT_SYMBOL(rproc_shutdown); | |
1826 | ||
fec47d86 DG |
1827 | /** |
1828 | * rproc_get_by_phandle() - find a remote processor by phandle | |
1829 | * @phandle: phandle to the rproc | |
1830 | * | |
1831 | * Finds an rproc handle using the remote processor's phandle, and then | |
1832 | * return a handle to the rproc. | |
1833 | * | |
1834 | * This function increments the remote processor's refcount, so always | |
1835 | * use rproc_put() to decrement it back once rproc isn't needed anymore. | |
1836 | * | |
1837 | * Returns the rproc handle on success, and NULL on failure. | |
1838 | */ | |
8de3dbd0 | 1839 | #ifdef CONFIG_OF |
fec47d86 DG |
1840 | struct rproc *rproc_get_by_phandle(phandle phandle) |
1841 | { | |
1842 | struct rproc *rproc = NULL, *r; | |
1843 | struct device_node *np; | |
1844 | ||
1845 | np = of_find_node_by_phandle(phandle); | |
1846 | if (!np) | |
1847 | return NULL; | |
1848 | ||
1849 | mutex_lock(&rproc_list_mutex); | |
1850 | list_for_each_entry(r, &rproc_list, node) { | |
1851 | if (r->dev.parent && r->dev.parent->of_node == np) { | |
fbb6aacb BA |
1852 | /* prevent underlying implementation from being removed */ |
1853 | if (!try_module_get(r->dev.parent->driver->owner)) { | |
1854 | dev_err(&r->dev, "can't get owner\n"); | |
1855 | break; | |
1856 | } | |
1857 | ||
fec47d86 DG |
1858 | rproc = r; |
1859 | get_device(&rproc->dev); | |
1860 | break; | |
1861 | } | |
1862 | } | |
1863 | mutex_unlock(&rproc_list_mutex); | |
1864 | ||
1865 | of_node_put(np); | |
1866 | ||
1867 | return rproc; | |
1868 | } | |
8de3dbd0 OBC |
1869 | #else |
1870 | struct rproc *rproc_get_by_phandle(phandle phandle) | |
1871 | { | |
1872 | return NULL; | |
1873 | } | |
1874 | #endif | |
fec47d86 DG |
1875 | EXPORT_SYMBOL(rproc_get_by_phandle); |
1876 | ||
400e64df | 1877 | /** |
160e7c84 | 1878 | * rproc_add() - register a remote processor |
400e64df OBC |
1879 | * @rproc: the remote processor handle to register |
1880 | * | |
1881 | * Registers @rproc with the remoteproc framework, after it has been | |
1882 | * allocated with rproc_alloc(). | |
1883 | * | |
1884 | * This is called by the platform-specific rproc implementation, whenever | |
1885 | * a new remote processor device is probed. | |
1886 | * | |
1887 | * Returns 0 on success and an appropriate error code otherwise. | |
1888 | * | |
1889 | * Note: this function initiates an asynchronous firmware loading | |
1890 | * context, which will look for virtio devices supported by the rproc's | |
1891 | * firmware. | |
1892 | * | |
1893 | * If found, those virtio devices will be created and added, so as a result | |
7a186941 | 1894 | * of registering this remote processor, additional virtio drivers might be |
400e64df | 1895 | * probed. |
400e64df | 1896 | */ |
160e7c84 | 1897 | int rproc_add(struct rproc *rproc) |
400e64df | 1898 | { |
b5ab5e24 | 1899 | struct device *dev = &rproc->dev; |
70b85ef8 | 1900 | int ret; |
400e64df | 1901 | |
b5ab5e24 OBC |
1902 | ret = device_add(dev); |
1903 | if (ret < 0) | |
1904 | return ret; | |
400e64df | 1905 | |
b5ab5e24 | 1906 | dev_info(dev, "%s is available\n", rproc->name); |
400e64df OBC |
1907 | |
1908 | /* create debugfs entries */ | |
1909 | rproc_create_debug_dir(rproc); | |
7a20c64d SJ |
1910 | |
1911 | /* if rproc is marked always-on, request it to boot */ | |
1912 | if (rproc->auto_boot) { | |
5e6533f7 | 1913 | ret = rproc_trigger_auto_boot(rproc); |
7a20c64d SJ |
1914 | if (ret < 0) |
1915 | return ret; | |
1916 | } | |
400e64df | 1917 | |
d2e12e66 DG |
1918 | /* expose to rproc_get_by_phandle users */ |
1919 | mutex_lock(&rproc_list_mutex); | |
1920 | list_add(&rproc->node, &rproc_list); | |
1921 | mutex_unlock(&rproc_list_mutex); | |
1922 | ||
1923 | return 0; | |
400e64df | 1924 | } |
160e7c84 | 1925 | EXPORT_SYMBOL(rproc_add); |
400e64df | 1926 | |
b5ab5e24 OBC |
1927 | /** |
1928 | * rproc_type_release() - release a remote processor instance | |
1929 | * @dev: the rproc's device | |
1930 | * | |
1931 | * This function should _never_ be called directly. | |
1932 | * | |
1933 | * It will be called by the driver core when no one holds a valid pointer | |
1934 | * to @dev anymore. | |
1935 | */ | |
1936 | static void rproc_type_release(struct device *dev) | |
1937 | { | |
1938 | struct rproc *rproc = container_of(dev, struct rproc, dev); | |
1939 | ||
7183a2a7 OBC |
1940 | dev_info(&rproc->dev, "releasing %s\n", rproc->name); |
1941 | ||
b5ab5e24 OBC |
1942 | idr_destroy(&rproc->notifyids); |
1943 | ||
1944 | if (rproc->index >= 0) | |
1945 | ida_simple_remove(&rproc_dev_index, rproc->index); | |
1946 | ||
0f57dc6a | 1947 | kfree(rproc->firmware); |
fb98e2bd | 1948 | kfree(rproc->ops); |
b5ab5e24 OBC |
1949 | kfree(rproc); |
1950 | } | |
1951 | ||
c42ca04d | 1952 | static const struct device_type rproc_type = { |
b5ab5e24 OBC |
1953 | .name = "remoteproc", |
1954 | .release = rproc_type_release, | |
1955 | }; | |
400e64df OBC |
1956 | |
1957 | /** | |
1958 | * rproc_alloc() - allocate a remote processor handle | |
1959 | * @dev: the underlying device | |
1960 | * @name: name of this remote processor | |
1961 | * @ops: platform-specific handlers (mainly start/stop) | |
8b4aec9a | 1962 | * @firmware: name of firmware file to load, can be NULL |
400e64df OBC |
1963 | * @len: length of private data needed by the rproc driver (in bytes) |
1964 | * | |
1965 | * Allocates a new remote processor handle, but does not register | |
8b4aec9a | 1966 | * it yet. if @firmware is NULL, a default name is used. |
400e64df OBC |
1967 | * |
1968 | * This function should be used by rproc implementations during initialization | |
1969 | * of the remote processor. | |
1970 | * | |
1971 | * After creating an rproc handle using this function, and when ready, | |
160e7c84 | 1972 | * implementations should then call rproc_add() to complete |
400e64df OBC |
1973 | * the registration of the remote processor. |
1974 | * | |
1975 | * On success the new rproc is returned, and on failure, NULL. | |
1976 | * | |
1977 | * Note: _never_ directly deallocate @rproc, even if it was not registered | |
433c0e04 | 1978 | * yet. Instead, when you need to unroll rproc_alloc(), use rproc_free(). |
400e64df OBC |
1979 | */ |
1980 | struct rproc *rproc_alloc(struct device *dev, const char *name, | |
730f84ce AS |
1981 | const struct rproc_ops *ops, |
1982 | const char *firmware, int len) | |
400e64df OBC |
1983 | { |
1984 | struct rproc *rproc; | |
8b4aec9a | 1985 | char *p, *template = "rproc-%s-fw"; |
0f57dc6a | 1986 | int name_len; |
400e64df OBC |
1987 | |
1988 | if (!dev || !name || !ops) | |
1989 | return NULL; | |
1990 | ||
0f57dc6a | 1991 | if (!firmware) { |
8b4aec9a | 1992 | /* |
8b4aec9a | 1993 | * If the caller didn't pass in a firmware name then |
0f57dc6a | 1994 | * construct a default name. |
8b4aec9a RT |
1995 | */ |
1996 | name_len = strlen(name) + strlen(template) - 2 + 1; | |
0f57dc6a MR |
1997 | p = kmalloc(name_len, GFP_KERNEL); |
1998 | if (!p) | |
1999 | return NULL; | |
8b4aec9a RT |
2000 | snprintf(p, name_len, template, name); |
2001 | } else { | |
0f57dc6a MR |
2002 | p = kstrdup(firmware, GFP_KERNEL); |
2003 | if (!p) | |
2004 | return NULL; | |
2005 | } | |
2006 | ||
2007 | rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL); | |
2008 | if (!rproc) { | |
2009 | kfree(p); | |
2010 | return NULL; | |
8b4aec9a RT |
2011 | } |
2012 | ||
fb98e2bd BA |
2013 | rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL); |
2014 | if (!rproc->ops) { | |
2015 | kfree(p); | |
2016 | kfree(rproc); | |
2017 | return NULL; | |
2018 | } | |
2019 | ||
8b4aec9a | 2020 | rproc->firmware = p; |
400e64df | 2021 | rproc->name = name; |
400e64df | 2022 | rproc->priv = &rproc[1]; |
ddf71187 | 2023 | rproc->auto_boot = true; |
400e64df | 2024 | |
b5ab5e24 OBC |
2025 | device_initialize(&rproc->dev); |
2026 | rproc->dev.parent = dev; | |
2027 | rproc->dev.type = &rproc_type; | |
2aefbef0 | 2028 | rproc->dev.class = &rproc_class; |
7c89717f | 2029 | rproc->dev.driver_data = rproc; |
b5ab5e24 OBC |
2030 | |
2031 | /* Assign a unique device index and name */ | |
2032 | rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL); | |
2033 | if (rproc->index < 0) { | |
2034 | dev_err(dev, "ida_simple_get failed: %d\n", rproc->index); | |
2035 | put_device(&rproc->dev); | |
2036 | return NULL; | |
2037 | } | |
2038 | ||
2039 | dev_set_name(&rproc->dev, "remoteproc%d", rproc->index); | |
2040 | ||
400e64df OBC |
2041 | atomic_set(&rproc->power, 0); |
2042 | ||
0f21f9cc BA |
2043 | /* Default to ELF loader if no load function is specified */ |
2044 | if (!rproc->ops->load) { | |
2045 | rproc->ops->load = rproc_elf_load_segments; | |
c1d35c1a | 2046 | rproc->ops->parse_fw = rproc_elf_load_rsc_table; |
0f21f9cc BA |
2047 | rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table; |
2048 | rproc->ops->sanity_check = rproc_elf_sanity_check; | |
2049 | rproc->ops->get_boot_addr = rproc_elf_get_boot_addr; | |
2050 | } | |
400e64df OBC |
2051 | |
2052 | mutex_init(&rproc->lock); | |
2053 | ||
7a186941 OBC |
2054 | idr_init(&rproc->notifyids); |
2055 | ||
400e64df OBC |
2056 | INIT_LIST_HEAD(&rproc->carveouts); |
2057 | INIT_LIST_HEAD(&rproc->mappings); | |
2058 | INIT_LIST_HEAD(&rproc->traces); | |
7a186941 | 2059 | INIT_LIST_HEAD(&rproc->rvdevs); |
7bdc9650 | 2060 | INIT_LIST_HEAD(&rproc->subdevs); |
2666ca91 | 2061 | INIT_LIST_HEAD(&rproc->dump_segments); |
400e64df | 2062 | |
8afd519c FGL |
2063 | INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work); |
2064 | ||
400e64df OBC |
2065 | rproc->state = RPROC_OFFLINE; |
2066 | ||
2067 | return rproc; | |
2068 | } | |
2069 | EXPORT_SYMBOL(rproc_alloc); | |
2070 | ||
2071 | /** | |
433c0e04 BA |
2072 | * rproc_free() - unroll rproc_alloc() |
2073 | * @rproc: the remote processor handle | |
2074 | * | |
2075 | * This function decrements the rproc dev refcount. | |
2076 | * | |
2077 | * If no one holds any reference to rproc anymore, then its refcount would | |
2078 | * now drop to zero, and it would be freed. | |
2079 | */ | |
2080 | void rproc_free(struct rproc *rproc) | |
2081 | { | |
2082 | put_device(&rproc->dev); | |
2083 | } | |
2084 | EXPORT_SYMBOL(rproc_free); | |
2085 | ||
2086 | /** | |
2087 | * rproc_put() - release rproc reference | |
400e64df OBC |
2088 | * @rproc: the remote processor handle |
2089 | * | |
c6b5a276 | 2090 | * This function decrements the rproc dev refcount. |
400e64df | 2091 | * |
c6b5a276 OBC |
2092 | * If no one holds any reference to rproc anymore, then its refcount would |
2093 | * now drop to zero, and it would be freed. | |
400e64df | 2094 | */ |
160e7c84 | 2095 | void rproc_put(struct rproc *rproc) |
400e64df | 2096 | { |
fbb6aacb | 2097 | module_put(rproc->dev.parent->driver->owner); |
b5ab5e24 | 2098 | put_device(&rproc->dev); |
400e64df | 2099 | } |
160e7c84 | 2100 | EXPORT_SYMBOL(rproc_put); |
400e64df OBC |
2101 | |
2102 | /** | |
160e7c84 | 2103 | * rproc_del() - unregister a remote processor |
400e64df OBC |
2104 | * @rproc: rproc handle to unregister |
2105 | * | |
400e64df OBC |
2106 | * This function should be called when the platform specific rproc |
2107 | * implementation decides to remove the rproc device. it should | |
160e7c84 | 2108 | * _only_ be called if a previous invocation of rproc_add() |
400e64df OBC |
2109 | * has completed successfully. |
2110 | * | |
160e7c84 | 2111 | * After rproc_del() returns, @rproc isn't freed yet, because |
c6b5a276 | 2112 | * of the outstanding reference created by rproc_alloc. To decrement that |
433c0e04 | 2113 | * one last refcount, one still needs to call rproc_free(). |
400e64df OBC |
2114 | * |
2115 | * Returns 0 on success and -EINVAL if @rproc isn't valid. | |
2116 | */ | |
160e7c84 | 2117 | int rproc_del(struct rproc *rproc) |
400e64df OBC |
2118 | { |
2119 | if (!rproc) | |
2120 | return -EINVAL; | |
2121 | ||
ddf71187 BA |
2122 | /* if rproc is marked always-on, rproc_add() booted it */ |
2123 | /* TODO: make sure this works with rproc->power > 1 */ | |
2124 | if (rproc->auto_boot) | |
2125 | rproc_shutdown(rproc); | |
2126 | ||
2099c77d SJ |
2127 | mutex_lock(&rproc->lock); |
2128 | rproc->state = RPROC_DELETED; | |
2129 | mutex_unlock(&rproc->lock); | |
2130 | ||
b003d45b SJ |
2131 | rproc_delete_debug_dir(rproc); |
2132 | ||
fec47d86 DG |
2133 | /* the rproc is downref'ed as soon as it's removed from the klist */ |
2134 | mutex_lock(&rproc_list_mutex); | |
2135 | list_del(&rproc->node); | |
2136 | mutex_unlock(&rproc_list_mutex); | |
2137 | ||
b5ab5e24 | 2138 | device_del(&rproc->dev); |
400e64df OBC |
2139 | |
2140 | return 0; | |
2141 | } | |
160e7c84 | 2142 | EXPORT_SYMBOL(rproc_del); |
400e64df | 2143 | |
7bdc9650 BA |
2144 | /** |
2145 | * rproc_add_subdev() - add a subdevice to a remoteproc | |
2146 | * @rproc: rproc handle to add the subdevice to | |
2147 | * @subdev: subdev handle to register | |
4902676f BA |
2148 | * |
2149 | * Caller is responsible for populating optional subdevice function pointers. | |
7bdc9650 | 2150 | */ |
4902676f | 2151 | void rproc_add_subdev(struct rproc *rproc, struct rproc_subdev *subdev) |
7bdc9650 | 2152 | { |
7bdc9650 BA |
2153 | list_add_tail(&subdev->node, &rproc->subdevs); |
2154 | } | |
2155 | EXPORT_SYMBOL(rproc_add_subdev); | |
2156 | ||
2157 | /** | |
2158 | * rproc_remove_subdev() - remove a subdevice from a remoteproc | |
2159 | * @rproc: rproc handle to remove the subdevice from | |
2160 | * @subdev: subdev handle, previously registered with rproc_add_subdev() | |
2161 | */ | |
2162 | void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev) | |
2163 | { | |
2164 | list_del(&subdev->node); | |
2165 | } | |
2166 | EXPORT_SYMBOL(rproc_remove_subdev); | |
2167 | ||
7c89717f BA |
2168 | /** |
2169 | * rproc_get_by_child() - acquire rproc handle of @dev's ancestor | |
2170 | * @dev: child device to find ancestor of | |
2171 | * | |
2172 | * Returns the ancestor rproc instance, or NULL if not found. | |
2173 | */ | |
2174 | struct rproc *rproc_get_by_child(struct device *dev) | |
2175 | { | |
2176 | for (dev = dev->parent; dev; dev = dev->parent) { | |
2177 | if (dev->type == &rproc_type) | |
2178 | return dev->driver_data; | |
2179 | } | |
2180 | ||
2181 | return NULL; | |
2182 | } | |
2183 | EXPORT_SYMBOL(rproc_get_by_child); | |
2184 | ||
8afd519c FGL |
2185 | /** |
2186 | * rproc_report_crash() - rproc crash reporter function | |
2187 | * @rproc: remote processor | |
2188 | * @type: crash type | |
2189 | * | |
2190 | * This function must be called every time a crash is detected by the low-level | |
2191 | * drivers implementing a specific remoteproc. This should not be called from a | |
2192 | * non-remoteproc driver. | |
2193 | * | |
2194 | * This function can be called from atomic/interrupt context. | |
2195 | */ | |
2196 | void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type) | |
2197 | { | |
2198 | if (!rproc) { | |
2199 | pr_err("NULL rproc pointer\n"); | |
2200 | return; | |
2201 | } | |
2202 | ||
2203 | dev_err(&rproc->dev, "crash detected in %s: type %s\n", | |
2204 | rproc->name, rproc_crash_to_string(type)); | |
2205 | ||
2206 | /* create a new task to handle the error */ | |
2207 | schedule_work(&rproc->crash_handler); | |
2208 | } | |
2209 | EXPORT_SYMBOL(rproc_report_crash); | |
2210 | ||
400e64df OBC |
2211 | static int __init remoteproc_init(void) |
2212 | { | |
2aefbef0 | 2213 | rproc_init_sysfs(); |
400e64df | 2214 | rproc_init_debugfs(); |
b5ab5e24 | 2215 | |
400e64df OBC |
2216 | return 0; |
2217 | } | |
2218 | module_init(remoteproc_init); | |
2219 | ||
2220 | static void __exit remoteproc_exit(void) | |
2221 | { | |
f42f79af SA |
2222 | ida_destroy(&rproc_dev_index); |
2223 | ||
400e64df | 2224 | rproc_exit_debugfs(); |
2aefbef0 | 2225 | rproc_exit_sysfs(); |
400e64df OBC |
2226 | } |
2227 | module_exit(remoteproc_exit); | |
2228 | ||
2229 | MODULE_LICENSE("GPL v2"); | |
2230 | MODULE_DESCRIPTION("Generic Remote Processor Framework"); |