1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * fsl-mc object allocator driver
4  *
5  * Copyright (C) 2013-2016 Freescale Semiconductor, Inc.
6  *
7  */
8 
9 #include <linux/module.h>
10 #include <linux/msi.h>
11 #include <linux/fsl/mc.h>
12 
13 #include "fsl-mc-private.h"
14 
15 static bool __must_check fsl_mc_is_allocatable(struct fsl_mc_device *mc_dev)
16 {
17 	return is_fsl_mc_bus_dpbp(mc_dev) ||
18 	       is_fsl_mc_bus_dpmcp(mc_dev) ||
19 	       is_fsl_mc_bus_dpcon(mc_dev);
20 }
21 
22 /**
23  * fsl_mc_resource_pool_add_device - add allocatable object to a resource
24  * pool of a given fsl-mc bus
25  *
26  * @mc_bus: pointer to the fsl-mc bus
27  * @pool_type: pool type
28  * @mc_dev: pointer to allocatable fsl-mc device
29  */
30 static int __must_check fsl_mc_resource_pool_add_device(struct fsl_mc_bus
31 								*mc_bus,
32 							enum fsl_mc_pool_type
33 								pool_type,
34 							struct fsl_mc_device
35 								*mc_dev)
36 {
37 	struct fsl_mc_resource_pool *res_pool;
38 	struct fsl_mc_resource *resource;
39 	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
40 	int error = -EINVAL;
41 
42 	if (pool_type < 0 || pool_type >= FSL_MC_NUM_POOL_TYPES)
43 		goto out;
44 	if (!fsl_mc_is_allocatable(mc_dev))
45 		goto out;
46 	if (mc_dev->resource)
47 		goto out;
48 
49 	res_pool = &mc_bus->resource_pools[pool_type];
50 	if (res_pool->type != pool_type)
51 		goto out;
52 	if (res_pool->mc_bus != mc_bus)
53 		goto out;
54 
55 	mutex_lock(&res_pool->mutex);
56 
57 	if (res_pool->max_count < 0)
58 		goto out_unlock;
59 	if (res_pool->free_count < 0 ||
60 	    res_pool->free_count > res_pool->max_count)
61 		goto out_unlock;
62 
63 	resource = devm_kzalloc(&mc_bus_dev->dev, sizeof(*resource),
64 				GFP_KERNEL);
65 	if (!resource) {
66 		error = -ENOMEM;
67 		dev_err(&mc_bus_dev->dev,
68 			"Failed to allocate memory for fsl_mc_resource\n");
69 		goto out_unlock;
70 	}
71 
72 	resource->type = pool_type;
73 	resource->id = mc_dev->obj_desc.id;
74 	resource->data = mc_dev;
75 	resource->parent_pool = res_pool;
76 	INIT_LIST_HEAD(&resource->node);
77 	list_add_tail(&resource->node, &res_pool->free_list);
78 	mc_dev->resource = resource;
79 	res_pool->free_count++;
80 	res_pool->max_count++;
81 	error = 0;
82 out_unlock:
83 	mutex_unlock(&res_pool->mutex);
84 out:
85 	return error;
86 }
87 
88 /**
89  * fsl_mc_resource_pool_remove_device - remove an allocatable device from a
90  * resource pool
91  *
92  * @mc_dev: pointer to allocatable fsl-mc device
93  *
94  * It permanently removes an allocatable fsl-mc device from the resource
95  * pool. It's an error if the device is in use.
96  */
97 static int __must_check fsl_mc_resource_pool_remove_device(struct fsl_mc_device
98 								   *mc_dev)
99 {
100 	struct fsl_mc_device *mc_bus_dev;
101 	struct fsl_mc_bus *mc_bus;
102 	struct fsl_mc_resource_pool *res_pool;
103 	struct fsl_mc_resource *resource;
104 	int error = -EINVAL;
105 
106 	if (!fsl_mc_is_allocatable(mc_dev))
107 		goto out;
108 
109 	resource = mc_dev->resource;
110 	if (!resource || resource->data != mc_dev)
111 		goto out;
112 
113 	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
114 	mc_bus = to_fsl_mc_bus(mc_bus_dev);
115 	res_pool = resource->parent_pool;
116 	if (res_pool != &mc_bus->resource_pools[resource->type])
117 		goto out;
118 
119 	mutex_lock(&res_pool->mutex);
120 
121 	if (res_pool->max_count <= 0)
122 		goto out_unlock;
123 	if (res_pool->free_count <= 0 ||
124 	    res_pool->free_count > res_pool->max_count)
125 		goto out_unlock;
126 
127 	/*
128 	 * If the device is currently allocated, its resource is not
129 	 * in the free list and thus, the device cannot be removed.
130 	 */
131 	if (list_empty(&resource->node)) {
132 		error = -EBUSY;
133 		dev_err(&mc_bus_dev->dev,
134 			"Device %s cannot be removed from resource pool\n",
135 			dev_name(&mc_dev->dev));
136 		goto out_unlock;
137 	}
138 
139 	list_del_init(&resource->node);
140 	res_pool->free_count--;
141 	res_pool->max_count--;
142 
143 	devm_kfree(&mc_bus_dev->dev, resource);
144 	mc_dev->resource = NULL;
145 	error = 0;
146 out_unlock:
147 	mutex_unlock(&res_pool->mutex);
148 out:
149 	return error;
150 }
151 
152 static const char *const fsl_mc_pool_type_strings[] = {
153 	[FSL_MC_POOL_DPMCP] = "dpmcp",
154 	[FSL_MC_POOL_DPBP] = "dpbp",
155 	[FSL_MC_POOL_DPCON] = "dpcon",
156 	[FSL_MC_POOL_IRQ] = "irq",
157 };
158 
159 static int __must_check object_type_to_pool_type(const char *object_type,
160 						 enum fsl_mc_pool_type
161 								*pool_type)
162 {
163 	unsigned int i;
164 
165 	for (i = 0; i < ARRAY_SIZE(fsl_mc_pool_type_strings); i++) {
166 		if (strcmp(object_type, fsl_mc_pool_type_strings[i]) == 0) {
167 			*pool_type = i;
168 			return 0;
169 		}
170 	}
171 
172 	return -EINVAL;
173 }
174 
175 int __must_check fsl_mc_resource_allocate(struct fsl_mc_bus *mc_bus,
176 					  enum fsl_mc_pool_type pool_type,
177 					  struct fsl_mc_resource **new_resource)
178 {
179 	struct fsl_mc_resource_pool *res_pool;
180 	struct fsl_mc_resource *resource;
181 	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
182 	int error = -EINVAL;
183 
184 	BUILD_BUG_ON(ARRAY_SIZE(fsl_mc_pool_type_strings) !=
185 		     FSL_MC_NUM_POOL_TYPES);
186 
187 	*new_resource = NULL;
188 	if (pool_type < 0 || pool_type >= FSL_MC_NUM_POOL_TYPES)
189 		goto out;
190 
191 	res_pool = &mc_bus->resource_pools[pool_type];
192 	if (res_pool->mc_bus != mc_bus)
193 		goto out;
194 
195 	mutex_lock(&res_pool->mutex);
196 	resource = list_first_entry_or_null(&res_pool->free_list,
197 					    struct fsl_mc_resource, node);
198 
199 	if (!resource) {
200 		error = -ENXIO;
201 		dev_err(&mc_bus_dev->dev,
202 			"No more resources of type %s left\n",
203 			fsl_mc_pool_type_strings[pool_type]);
204 		goto out_unlock;
205 	}
206 
207 	if (resource->type != pool_type)
208 		goto out_unlock;
209 	if (resource->parent_pool != res_pool)
210 		goto out_unlock;
211 	if (res_pool->free_count <= 0 ||
212 	    res_pool->free_count > res_pool->max_count)
213 		goto out_unlock;
214 
215 	list_del_init(&resource->node);
216 
217 	res_pool->free_count--;
218 	error = 0;
219 out_unlock:
220 	mutex_unlock(&res_pool->mutex);
221 	*new_resource = resource;
222 out:
223 	return error;
224 }
225 EXPORT_SYMBOL_GPL(fsl_mc_resource_allocate);
226 
227 void fsl_mc_resource_free(struct fsl_mc_resource *resource)
228 {
229 	struct fsl_mc_resource_pool *res_pool;
230 
231 	res_pool = resource->parent_pool;
232 	if (resource->type != res_pool->type)
233 		return;
234 
235 	mutex_lock(&res_pool->mutex);
236 	if (res_pool->free_count < 0 ||
237 	    res_pool->free_count >= res_pool->max_count)
238 		goto out_unlock;
239 
240 	if (!list_empty(&resource->node))
241 		goto out_unlock;
242 
243 	list_add_tail(&resource->node, &res_pool->free_list);
244 	res_pool->free_count++;
245 out_unlock:
246 	mutex_unlock(&res_pool->mutex);
247 }
248 EXPORT_SYMBOL_GPL(fsl_mc_resource_free);
249 
250 /**
251  * fsl_mc_object_allocate - Allocates an fsl-mc object of the given
252  * pool type from a given fsl-mc bus instance
253  *
254  * @mc_dev: fsl-mc device which is used in conjunction with the
255  * allocated object
256  * @pool_type: pool type
257  * @new_mc_adev: pointer to area where the pointer to the allocated device
258  * is to be returned
259  *
260  * Allocatable objects are always used in conjunction with some functional
261  * device.  This function allocates an object of the specified type from
262  * the DPRC containing the functional device.
263  *
264  * NOTE: pool_type must be different from FSL_MC_POOL_MCP, since MC
265  * portals are allocated using fsl_mc_portal_allocate(), instead of
266  * this function.
267  */
268 int __must_check fsl_mc_object_allocate(struct fsl_mc_device *mc_dev,
269 					enum fsl_mc_pool_type pool_type,
270 					struct fsl_mc_device **new_mc_adev)
271 {
272 	struct fsl_mc_device *mc_bus_dev;
273 	struct fsl_mc_bus *mc_bus;
274 	struct fsl_mc_device *mc_adev;
275 	int error = -EINVAL;
276 	struct fsl_mc_resource *resource = NULL;
277 
278 	*new_mc_adev = NULL;
279 	if (mc_dev->flags & FSL_MC_IS_DPRC)
280 		goto error;
281 
282 	if (!dev_is_fsl_mc(mc_dev->dev.parent))
283 		goto error;
284 
285 	if (pool_type == FSL_MC_POOL_DPMCP)
286 		goto error;
287 
288 	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
289 	mc_bus = to_fsl_mc_bus(mc_bus_dev);
290 	error = fsl_mc_resource_allocate(mc_bus, pool_type, &resource);
291 	if (error < 0)
292 		goto error;
293 
294 	mc_adev = resource->data;
295 	if (!mc_adev) {
296 		error = -EINVAL;
297 		goto error;
298 	}
299 
300 	mc_adev->consumer_link = device_link_add(&mc_dev->dev,
301 						 &mc_adev->dev,
302 						 DL_FLAG_AUTOREMOVE_CONSUMER);
303 	if (!mc_adev->consumer_link) {
304 		error = -EINVAL;
305 		goto error;
306 	}
307 
308 	*new_mc_adev = mc_adev;
309 	return 0;
310 error:
311 	if (resource)
312 		fsl_mc_resource_free(resource);
313 
314 	return error;
315 }
316 EXPORT_SYMBOL_GPL(fsl_mc_object_allocate);
317 
318 /**
319  * fsl_mc_object_free - Returns an fsl-mc object to the resource
320  * pool where it came from.
321  * @mc_adev: Pointer to the fsl-mc device
322  */
323 void fsl_mc_object_free(struct fsl_mc_device *mc_adev)
324 {
325 	struct fsl_mc_resource *resource;
326 
327 	resource = mc_adev->resource;
328 	if (resource->type == FSL_MC_POOL_DPMCP)
329 		return;
330 	if (resource->data != mc_adev)
331 		return;
332 
333 	fsl_mc_resource_free(resource);
334 
335 	mc_adev->consumer_link = NULL;
336 }
337 EXPORT_SYMBOL_GPL(fsl_mc_object_free);
338 
339 /*
340  * A DPRC and the devices in the DPRC all share the same GIC-ITS device
341  * ID.  A block of IRQs is pre-allocated and maintained in a pool
342  * from which devices can allocate them when needed.
343  */
344 
345 /*
346  * Initialize the interrupt pool associated with an fsl-mc bus.
347  * It allocates a block of IRQs from the GIC-ITS.
348  */
349 int fsl_mc_populate_irq_pool(struct fsl_mc_device *mc_bus_dev,
350 			     unsigned int irq_count)
351 {
352 	unsigned int i;
353 	struct msi_desc *msi_desc;
354 	struct fsl_mc_device_irq *irq_resources;
355 	struct fsl_mc_device_irq *mc_dev_irq;
356 	int error;
357 	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
358 	struct fsl_mc_resource_pool *res_pool =
359 			&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
360 
361 	/* do nothing if the IRQ pool is already populated */
362 	if (mc_bus->irq_resources)
363 		return 0;
364 
365 	if (irq_count == 0 ||
366 	    irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS)
367 		return -EINVAL;
368 
369 	error = fsl_mc_msi_domain_alloc_irqs(&mc_bus_dev->dev, irq_count);
370 	if (error < 0)
371 		return error;
372 
373 	irq_resources = devm_kcalloc(&mc_bus_dev->dev,
374 				     irq_count, sizeof(*irq_resources),
375 				     GFP_KERNEL);
376 	if (!irq_resources) {
377 		error = -ENOMEM;
378 		goto cleanup_msi_irqs;
379 	}
380 
381 	for (i = 0; i < irq_count; i++) {
382 		mc_dev_irq = &irq_resources[i];
383 
384 		/*
385 		 * NOTE: This mc_dev_irq's MSI addr/value pair will be set
386 		 * by the fsl_mc_msi_write_msg() callback
387 		 */
388 		mc_dev_irq->resource.type = res_pool->type;
389 		mc_dev_irq->resource.data = mc_dev_irq;
390 		mc_dev_irq->resource.parent_pool = res_pool;
391 		INIT_LIST_HEAD(&mc_dev_irq->resource.node);
392 		list_add_tail(&mc_dev_irq->resource.node, &res_pool->free_list);
393 	}
394 
395 	for_each_msi_entry(msi_desc, &mc_bus_dev->dev) {
396 		mc_dev_irq = &irq_resources[msi_desc->fsl_mc.msi_index];
397 		mc_dev_irq->msi_desc = msi_desc;
398 		mc_dev_irq->resource.id = msi_desc->irq;
399 	}
400 
401 	res_pool->max_count = irq_count;
402 	res_pool->free_count = irq_count;
403 	mc_bus->irq_resources = irq_resources;
404 	return 0;
405 
406 cleanup_msi_irqs:
407 	fsl_mc_msi_domain_free_irqs(&mc_bus_dev->dev);
408 	return error;
409 }
410 EXPORT_SYMBOL_GPL(fsl_mc_populate_irq_pool);
411 
412 /*
413  * Teardown the interrupt pool associated with an fsl-mc bus.
414  * It frees the IRQs that were allocated to the pool, back to the GIC-ITS.
415  */
416 void fsl_mc_cleanup_irq_pool(struct fsl_mc_device *mc_bus_dev)
417 {
418 	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
419 	struct fsl_mc_resource_pool *res_pool =
420 			&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
421 
422 	if (!mc_bus->irq_resources)
423 		return;
424 
425 	if (res_pool->max_count == 0)
426 		return;
427 
428 	if (res_pool->free_count != res_pool->max_count)
429 		return;
430 
431 	INIT_LIST_HEAD(&res_pool->free_list);
432 	res_pool->max_count = 0;
433 	res_pool->free_count = 0;
434 	mc_bus->irq_resources = NULL;
435 	fsl_mc_msi_domain_free_irqs(&mc_bus_dev->dev);
436 }
437 EXPORT_SYMBOL_GPL(fsl_mc_cleanup_irq_pool);
438 
439 /*
440  * Allocate the IRQs required by a given fsl-mc device.
441  */
442 int __must_check fsl_mc_allocate_irqs(struct fsl_mc_device *mc_dev)
443 {
444 	int i;
445 	int irq_count;
446 	int res_allocated_count = 0;
447 	int error = -EINVAL;
448 	struct fsl_mc_device_irq **irqs = NULL;
449 	struct fsl_mc_bus *mc_bus;
450 	struct fsl_mc_resource_pool *res_pool;
451 
452 	if (mc_dev->irqs)
453 		return -EINVAL;
454 
455 	irq_count = mc_dev->obj_desc.irq_count;
456 	if (irq_count == 0)
457 		return -EINVAL;
458 
459 	if (is_fsl_mc_bus_dprc(mc_dev))
460 		mc_bus = to_fsl_mc_bus(mc_dev);
461 	else
462 		mc_bus = to_fsl_mc_bus(to_fsl_mc_device(mc_dev->dev.parent));
463 
464 	if (!mc_bus->irq_resources)
465 		return -EINVAL;
466 
467 	res_pool = &mc_bus->resource_pools[FSL_MC_POOL_IRQ];
468 	if (res_pool->free_count < irq_count) {
469 		dev_err(&mc_dev->dev,
470 			"Not able to allocate %u irqs for device\n", irq_count);
471 		return -ENOSPC;
472 	}
473 
474 	irqs = devm_kcalloc(&mc_dev->dev, irq_count, sizeof(irqs[0]),
475 			    GFP_KERNEL);
476 	if (!irqs)
477 		return -ENOMEM;
478 
479 	for (i = 0; i < irq_count; i++) {
480 		struct fsl_mc_resource *resource;
481 
482 		error = fsl_mc_resource_allocate(mc_bus, FSL_MC_POOL_IRQ,
483 						 &resource);
484 		if (error < 0)
485 			goto error_resource_alloc;
486 
487 		irqs[i] = to_fsl_mc_irq(resource);
488 		res_allocated_count++;
489 
490 		irqs[i]->mc_dev = mc_dev;
491 		irqs[i]->dev_irq_index = i;
492 	}
493 
494 	mc_dev->irqs = irqs;
495 	return 0;
496 
497 error_resource_alloc:
498 	for (i = 0; i < res_allocated_count; i++) {
499 		irqs[i]->mc_dev = NULL;
500 		fsl_mc_resource_free(&irqs[i]->resource);
501 	}
502 
503 	return error;
504 }
505 EXPORT_SYMBOL_GPL(fsl_mc_allocate_irqs);
506 
507 /*
508  * Frees the IRQs that were allocated for an fsl-mc device.
509  */
510 void fsl_mc_free_irqs(struct fsl_mc_device *mc_dev)
511 {
512 	int i;
513 	int irq_count;
514 	struct fsl_mc_bus *mc_bus;
515 	struct fsl_mc_device_irq **irqs = mc_dev->irqs;
516 
517 	if (!irqs)
518 		return;
519 
520 	irq_count = mc_dev->obj_desc.irq_count;
521 
522 	if (is_fsl_mc_bus_dprc(mc_dev))
523 		mc_bus = to_fsl_mc_bus(mc_dev);
524 	else
525 		mc_bus = to_fsl_mc_bus(to_fsl_mc_device(mc_dev->dev.parent));
526 
527 	if (!mc_bus->irq_resources)
528 		return;
529 
530 	for (i = 0; i < irq_count; i++) {
531 		irqs[i]->mc_dev = NULL;
532 		fsl_mc_resource_free(&irqs[i]->resource);
533 	}
534 
535 	mc_dev->irqs = NULL;
536 }
537 EXPORT_SYMBOL_GPL(fsl_mc_free_irqs);
538 
539 void fsl_mc_init_all_resource_pools(struct fsl_mc_device *mc_bus_dev)
540 {
541 	int pool_type;
542 	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
543 
544 	for (pool_type = 0; pool_type < FSL_MC_NUM_POOL_TYPES; pool_type++) {
545 		struct fsl_mc_resource_pool *res_pool =
546 		    &mc_bus->resource_pools[pool_type];
547 
548 		res_pool->type = pool_type;
549 		res_pool->max_count = 0;
550 		res_pool->free_count = 0;
551 		res_pool->mc_bus = mc_bus;
552 		INIT_LIST_HEAD(&res_pool->free_list);
553 		mutex_init(&res_pool->mutex);
554 	}
555 }
556 
557 static void fsl_mc_cleanup_resource_pool(struct fsl_mc_device *mc_bus_dev,
558 					 enum fsl_mc_pool_type pool_type)
559 {
560 	struct fsl_mc_resource *resource;
561 	struct fsl_mc_resource *next;
562 	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
563 	struct fsl_mc_resource_pool *res_pool =
564 					&mc_bus->resource_pools[pool_type];
565 	int free_count = 0;
566 
567 	list_for_each_entry_safe(resource, next, &res_pool->free_list, node) {
568 		free_count++;
569 		devm_kfree(&mc_bus_dev->dev, resource);
570 	}
571 }
572 
573 void fsl_mc_cleanup_all_resource_pools(struct fsl_mc_device *mc_bus_dev)
574 {
575 	int pool_type;
576 
577 	for (pool_type = 0; pool_type < FSL_MC_NUM_POOL_TYPES; pool_type++)
578 		fsl_mc_cleanup_resource_pool(mc_bus_dev, pool_type);
579 }
580 
581 /*
582  * fsl_mc_allocator_probe - callback invoked when an allocatable device is
583  * being added to the system
584  */
585 static int fsl_mc_allocator_probe(struct fsl_mc_device *mc_dev)
586 {
587 	enum fsl_mc_pool_type pool_type;
588 	struct fsl_mc_device *mc_bus_dev;
589 	struct fsl_mc_bus *mc_bus;
590 	int error;
591 
592 	if (!fsl_mc_is_allocatable(mc_dev))
593 		return -EINVAL;
594 
595 	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
596 	if (!dev_is_fsl_mc(&mc_bus_dev->dev))
597 		return -EINVAL;
598 
599 	mc_bus = to_fsl_mc_bus(mc_bus_dev);
600 	error = object_type_to_pool_type(mc_dev->obj_desc.type, &pool_type);
601 	if (error < 0)
602 		return error;
603 
604 	error = fsl_mc_resource_pool_add_device(mc_bus, pool_type, mc_dev);
605 	if (error < 0)
606 		return error;
607 
608 	dev_dbg(&mc_dev->dev,
609 		"Allocatable fsl-mc device bound to fsl_mc_allocator driver");
610 	return 0;
611 }
612 
613 /*
614  * fsl_mc_allocator_remove - callback invoked when an allocatable device is
615  * being removed from the system
616  */
617 static int fsl_mc_allocator_remove(struct fsl_mc_device *mc_dev)
618 {
619 	int error;
620 
621 	if (!fsl_mc_is_allocatable(mc_dev))
622 		return -EINVAL;
623 
624 	if (mc_dev->resource) {
625 		error = fsl_mc_resource_pool_remove_device(mc_dev);
626 		if (error < 0)
627 			return error;
628 	}
629 
630 	dev_dbg(&mc_dev->dev,
631 		"Allocatable fsl-mc device unbound from fsl_mc_allocator driver");
632 	return 0;
633 }
634 
635 static const struct fsl_mc_device_id match_id_table[] = {
636 	{
637 	 .vendor = FSL_MC_VENDOR_FREESCALE,
638 	 .obj_type = "dpbp",
639 	},
640 	{
641 	 .vendor = FSL_MC_VENDOR_FREESCALE,
642 	 .obj_type = "dpmcp",
643 	},
644 	{
645 	 .vendor = FSL_MC_VENDOR_FREESCALE,
646 	 .obj_type = "dpcon",
647 	},
648 	{.vendor = 0x0},
649 };
650 
651 static struct fsl_mc_driver fsl_mc_allocator_driver = {
652 	.driver = {
653 		   .name = "fsl_mc_allocator",
654 		   .pm = NULL,
655 		   },
656 	.match_id_table = match_id_table,
657 	.probe = fsl_mc_allocator_probe,
658 	.remove = fsl_mc_allocator_remove,
659 };
660 
661 int __init fsl_mc_allocator_driver_init(void)
662 {
663 	return fsl_mc_driver_register(&fsl_mc_allocator_driver);
664 }
665 
666 void fsl_mc_allocator_driver_exit(void)
667 {
668 	fsl_mc_driver_unregister(&fsl_mc_allocator_driver);
669 }
670