1 // SPDX-License-Identifier: GPL-2.0+
44 		return -ENOMEM;  in early_init_dt_alloc_reserved_memory_arch()
60  * fdt_reserved_mem_save_node() - save fdt node for second pass initialization
72 	rmem->fdt_node = node;  in fdt_reserved_mem_save_node()
73 	rmem->name = uname;  in fdt_reserved_mem_save_node()
74 	rmem->base = base;  in fdt_reserved_mem_save_node()
75 	rmem->size = size;  in fdt_reserved_mem_save_node()
82  * __reserved_mem_alloc_in_range() - allocate reserved memory described with
83  *	'alloc-ranges'. Choose bottom-up/top-down depending on nearby existing
98 		if (rmem->size == 0)  in __reserved_mem_alloc_in_range()
102 		 * If range starts next to an existing reservation, use bottom-up:  in __reserved_mem_alloc_in_range()
104 		 *	       --RRRR------  in __reserved_mem_alloc_in_range()
106 		if (start >= rmem->base && start <= (rmem->base + rmem->size))  in __reserved_mem_alloc_in_range()
110 		 * If range ends next to an existing reservation, use top-down:  in __reserved_mem_alloc_in_range()
112 		 *	              -------RRRR-----  in __reserved_mem_alloc_in_range()
114 		if (end >= rmem->base && end <= (rmem->base + rmem->size))  in __reserved_mem_alloc_in_range()
118 	/* Change setting only if either bottom-up or top-down was selected */  in __reserved_mem_alloc_in_range()
133  * __reserved_mem_alloc_size() - allocate reserved memory described by
134  *	'size', 'alignment'  and 'alloc-ranges' properties.
149 		return -EINVAL;  in __reserved_mem_alloc_size()
153 		return -EINVAL;  in __reserved_mem_alloc_size()
162 			return -EINVAL;  in __reserved_mem_alloc_size()
167 	nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;  in __reserved_mem_alloc_size()
171 	    && of_flat_dt_is_compatible(node, "shared-dma-pool")  in __reserved_mem_alloc_size()
176 	prop = of_get_flat_dt_prop(node, "alloc-ranges", &len);  in __reserved_mem_alloc_size()
180 			pr_err("invalid alloc-ranges property in '%s', skipping node.\n",  in __reserved_mem_alloc_size()
182 			return -EINVAL;  in __reserved_mem_alloc_size()
200 			len -= t_len;  in __reserved_mem_alloc_size()
214 		return -ENOMEM;  in __reserved_mem_alloc_size()
227  * __reserved_mem_init_node() - call region specific reserved memory init code
233 	int ret = -ENOENT;  in __reserved_mem_init_node()
236 		reservedmem_of_init_fn initfn = i->data;  in __reserved_mem_init_node()
237 		const char *compat = i->compatible;  in __reserved_mem_init_node()
239 		if (!of_flat_dt_is_compatible(rmem->fdt_node, compat))  in __reserved_mem_init_node()
245 				rmem->name, compat);  in __reserved_mem_init_node()
256 	if (ra->base < rb->base)  in __rmem_cmp()
257 		return -1;  in __rmem_cmp()
259 	if (ra->base > rb->base)  in __rmem_cmp()
267 	if (ra->size < rb->size)  in __rmem_cmp()
268 		return -1;  in __rmem_cmp()
269 	if (ra->size > rb->size)  in __rmem_cmp()
272 	if (ra->fdt_node < rb->fdt_node)  in __rmem_cmp()
273 		return -1;  in __rmem_cmp()
274 	if (ra->fdt_node > rb->fdt_node)  in __rmem_cmp()
289 	for (i = 0; i < reserved_mem_count - 1; i++) {  in __rmem_check_for_overlap()
295 		if (this->base + this->size > next->base) {  in __rmem_check_for_overlap()
298 			this_end = this->base + this->size;  in __rmem_check_for_overlap()
299 			next_end = next->base + next->size;  in __rmem_check_for_overlap()
300 			pr_err("OVERLAP DETECTED!\n%s (%pa--%pa) overlaps with %s (%pa--%pa)\n",  in __rmem_check_for_overlap()
301 			       this->name, &this->base, &this_end,  in __rmem_check_for_overlap()
302 			       next->name, &next->base, &next_end);  in __rmem_check_for_overlap()
308  * fdt_init_reserved_mem() - allocate and init all saved reserved memory regions
319 		unsigned long node = rmem->fdt_node;  in fdt_init_reserved_mem()
325 		nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;  in fdt_init_reserved_mem()
330 			rmem->phandle = of_read_number(prop, len/4);  in fdt_init_reserved_mem()
332 		if (rmem->size == 0)  in fdt_init_reserved_mem()
333 			err = __reserved_mem_alloc_size(node, rmem->name,  in fdt_init_reserved_mem()
334 						 &rmem->base, &rmem->size);  in fdt_init_reserved_mem()
337 			if (err != 0 && err != -ENOENT) {  in fdt_init_reserved_mem()
339 					rmem->name);  in fdt_init_reserved_mem()
341 					memblock_clear_nomap(rmem->base, rmem->size);  in fdt_init_reserved_mem()
343 					memblock_phys_free(rmem->base,  in fdt_init_reserved_mem()
344 							   rmem->size);  in fdt_init_reserved_mem()
346 				phys_addr_t end = rmem->base + rmem->size - 1;  in fdt_init_reserved_mem()
351 					&rmem->base, &end, (unsigned long)(rmem->size / SZ_1K),  in fdt_init_reserved_mem()
353 					reusable ? "reusable" : "non-reusable",  in fdt_init_reserved_mem()
354 					rmem->name ? rmem->name : "unknown");  in fdt_init_reserved_mem()
364 	if (!node->phandle)  in __find_rmem()
368 		if (reserved_mem[i].phandle == node->phandle)  in __find_rmem()
383  * of_reserved_mem_device_init_by_idx() - assign reserved memory region to
386  * @np:		Pointer to the device_node with 'reserved-memory' property
389  * This function assigns respective DMA-mapping operations based on reserved
390  * memory region specified by 'memory-region' property in @np node to the @dev
406 		return -EINVAL;  in of_reserved_mem_device_init_by_idx()
408 	target = of_parse_phandle(np, "memory-region", idx);  in of_reserved_mem_device_init_by_idx()
410 		return -ENODEV;  in of_reserved_mem_device_init_by_idx()
420 	if (!rmem || !rmem->ops || !rmem->ops->device_init)  in of_reserved_mem_device_init_by_idx()
421 		return -EINVAL;  in of_reserved_mem_device_init_by_idx()
425 		return -ENOMEM;  in of_reserved_mem_device_init_by_idx()
427 	ret = rmem->ops->device_init(rmem, dev);  in of_reserved_mem_device_init_by_idx()
429 		rd->dev = dev;  in of_reserved_mem_device_init_by_idx()
430 		rd->rmem = rmem;  in of_reserved_mem_device_init_by_idx()
433 		list_add(&rd->list, &of_rmem_assigned_device_list);  in of_reserved_mem_device_init_by_idx()
436 		dev_info(dev, "assigned reserved memory node %s\n", rmem->name);  in of_reserved_mem_device_init_by_idx()
446  * of_reserved_mem_device_init_by_name() - assign named reserved memory region
449  * @np: pointer to the device node with 'memory-region' property
452  * Returns: 0 on success or a negative error-code on failure.
458 	int idx = of_property_match_string(np, "memory-region-names", name);  in of_reserved_mem_device_init_by_name()
465  * of_reserved_mem_device_release() - release reserved memory device structures
478 		if (rd->dev == dev)  in of_reserved_mem_device_release()
479 			list_move_tail(&rd->list, &release_list);  in of_reserved_mem_device_release()
484 		if (rd->rmem && rd->rmem->ops && rd->rmem->ops->device_release)  in of_reserved_mem_device_release()
485 			rd->rmem->ops->device_release(rd->rmem, dev);  in of_reserved_mem_device_release()
493  * of_reserved_mem_lookup() - acquire reserved_mem from a device node
494  * @np:		node pointer of the desired reserved-memory region
506 	if (!np->full_name)  in of_reserved_mem_lookup()
509 	name = kbasename(np->full_name);  in of_reserved_mem_lookup()