Lines Matching +full:reserved +full:- +full:memory
1 // SPDX-License-Identifier: GPL-2.0+
3 * Device tree based initialization code for reserved memory.
5 * Copyright (c) 2013, 2015 The Linux Foundation. All Rights Reserved.
12 #define pr_fmt(fmt) "OF: reserved mem: " fmt
51 return -ENOMEM; in early_init_dt_alloc_reserved_memory_arch()
61 * fdt_reserved_mem_save_node() - save fdt node for second pass initialization
73 rmem->fdt_node = node; in fdt_reserved_mem_save_node()
74 rmem->name = uname; in fdt_reserved_mem_save_node()
75 rmem->base = base; in fdt_reserved_mem_save_node()
76 rmem->size = size; in fdt_reserved_mem_save_node()
90 * __reserved_mem_alloc_size() - allocate reserved memory described by
91 * 'size', 'alignment' and 'alloc-ranges' properties.
106 return -EINVAL; in __reserved_mem_alloc_size()
110 return -EINVAL; in __reserved_mem_alloc_size()
119 return -EINVAL; in __reserved_mem_alloc_size()
124 nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL; in __reserved_mem_alloc_size()
128 && of_flat_dt_is_compatible(node, "shared-dma-pool") in __reserved_mem_alloc_size()
132 max_t(unsigned long, MAX_ORDER - 1, pageblock_order); in __reserved_mem_alloc_size()
137 prop = of_get_flat_dt_prop(node, "alloc-ranges", &len); in __reserved_mem_alloc_size()
141 pr_err("invalid alloc-ranges property in '%s', skipping node.\n", in __reserved_mem_alloc_size()
143 return -EINVAL; in __reserved_mem_alloc_size()
156 pr_debug("allocated memory for '%s' node: base %pa, size %lu MiB\n", in __reserved_mem_alloc_size()
161 len -= t_len; in __reserved_mem_alloc_size()
168 pr_debug("allocated memory for '%s' node: base %pa, size %lu MiB\n", in __reserved_mem_alloc_size()
173 pr_info("failed to allocate memory for node '%s'\n", uname); in __reserved_mem_alloc_size()
174 return -ENOMEM; in __reserved_mem_alloc_size()
194 * __reserved_mem_init_node() - call region specific reserved memory init code
200 int ret = -ENOENT; in __reserved_mem_init_node()
203 reservedmem_of_init_fn initfn = i->data; in __reserved_mem_init_node()
204 const char *compat = i->compatible; in __reserved_mem_init_node()
206 if (!of_flat_dt_is_compatible(rmem->fdt_node, compat)) in __reserved_mem_init_node()
212 rmem->name, compat); in __reserved_mem_init_node()
223 if (ra->base < rb->base) in __rmem_cmp()
224 return -1; in __rmem_cmp()
226 if (ra->base > rb->base) in __rmem_cmp()
234 if (ra->size < rb->size) in __rmem_cmp()
235 return -1; in __rmem_cmp()
236 if (ra->size > rb->size) in __rmem_cmp()
251 for (i = 0; i < reserved_mem_count - 1; i++) { in __rmem_check_for_overlap()
257 if (this->base + this->size > next->base) { in __rmem_check_for_overlap()
260 this_end = this->base + this->size; in __rmem_check_for_overlap()
261 next_end = next->base + next->size; in __rmem_check_for_overlap()
262 pr_err("OVERLAP DETECTED!\n%s (%pa--%pa) overlaps with %s (%pa--%pa)\n", in __rmem_check_for_overlap()
263 this->name, &this->base, &this_end, in __rmem_check_for_overlap()
264 next->name, &next->base, &next_end); in __rmem_check_for_overlap()
270 * fdt_init_reserved_mem() - allocate and init all saved reserved memory regions
276 /* check for overlapping reserved regions */ in fdt_init_reserved_mem()
281 unsigned long node = rmem->fdt_node; in fdt_init_reserved_mem()
287 nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL; in fdt_init_reserved_mem()
292 rmem->phandle = of_read_number(prop, len/4); in fdt_init_reserved_mem()
294 if (rmem->size == 0) in fdt_init_reserved_mem()
295 err = __reserved_mem_alloc_size(node, rmem->name, in fdt_init_reserved_mem()
296 &rmem->base, &rmem->size); in fdt_init_reserved_mem()
299 if (err != 0 && err != -ENOENT) { in fdt_init_reserved_mem()
301 rmem->name); in fdt_init_reserved_mem()
302 memblock_free(rmem->base, rmem->size); in fdt_init_reserved_mem()
304 memblock_add(rmem->base, rmem->size); in fdt_init_reserved_mem()
314 if (!node->phandle) in __find_rmem()
318 if (reserved_mem[i].phandle == node->phandle) in __find_rmem()
333 * of_reserved_mem_device_init_by_idx() - assign reserved memory region to
336 * @np: Pointer to the device_node with 'reserved-memory' property
339 * This function assigns respective DMA-mapping operations based on reserved
340 * memory region specified by 'memory-region' property in @np node to the @dev
341 * device. When driver needs to use more than one reserved memory region, it
356 return -EINVAL; in of_reserved_mem_device_init_by_idx()
358 target = of_parse_phandle(np, "memory-region", idx); in of_reserved_mem_device_init_by_idx()
360 return -ENODEV; in of_reserved_mem_device_init_by_idx()
370 if (!rmem || !rmem->ops || !rmem->ops->device_init) in of_reserved_mem_device_init_by_idx()
371 return -EINVAL; in of_reserved_mem_device_init_by_idx()
375 return -ENOMEM; in of_reserved_mem_device_init_by_idx()
377 ret = rmem->ops->device_init(rmem, dev); in of_reserved_mem_device_init_by_idx()
379 rd->dev = dev; in of_reserved_mem_device_init_by_idx()
380 rd->rmem = rmem; in of_reserved_mem_device_init_by_idx()
383 list_add(&rd->list, &of_rmem_assigned_device_list); in of_reserved_mem_device_init_by_idx()
386 dev_info(dev, "assigned reserved memory node %s\n", rmem->name); in of_reserved_mem_device_init_by_idx()
396 * of_reserved_mem_device_init_by_name() - assign named reserved memory region
399 * @np: pointer to the device node with 'memory-region' property
400 * @name: name of the selected memory region
402 * Returns: 0 on success or a negative error-code on failure.
408 int idx = of_property_match_string(np, "memory-region-names", name); in of_reserved_mem_device_init_by_name()
415 * of_reserved_mem_device_release() - release reserved memory device structures
418 * This function releases structures allocated for memory region handling for
428 if (rd->dev == dev) in of_reserved_mem_device_release()
429 list_move_tail(&rd->list, &release_list); in of_reserved_mem_device_release()
434 if (rd->rmem && rd->rmem->ops && rd->rmem->ops->device_release) in of_reserved_mem_device_release()
435 rd->rmem->ops->device_release(rd->rmem, dev); in of_reserved_mem_device_release()
443 * of_reserved_mem_lookup() - acquire reserved_mem from a device node
444 * @np: node pointer of the desired reserved-memory region
456 if (!np->full_name) in of_reserved_mem_lookup()
459 name = kbasename(np->full_name); in of_reserved_mem_lookup()
471 struct reserved_mem *dt_reserved_mem = m->private; in dt_reserved_memory_debug_show()
486 /* find out dynamic reserved memory node */ in dt_reserved_memory_debug_show()
488 if (!strcmp(rmem->name, dynamic_reserved_mem_array[j])) { in dt_reserved_memory_debug_show()
494 /* find out cma reserved memory node */ in dt_reserved_memory_debug_show()
496 if (!strcmp(rmem->name, cma_reserved_mem_array[j])) { in dt_reserved_memory_debug_show()
504 (unsigned long long)rmem->base, in dt_reserved_memory_debug_show()
505 (unsigned long long)(rmem->base + rmem->size - 1), in dt_reserved_memory_debug_show()
506 (unsigned long long)rmem->size / SZ_1K, in dt_reserved_memory_debug_show()
509 rmem->name); in dt_reserved_memory_debug_show()
517 return single_open(file, dt_reserved_memory_debug_show, inode->i_private); in dt_reserved_memory_debug_open()
531 return -ENXIO; in dt_reserved_memory_init_debugfs()