1 // SPDX-License-Identifier: GPL-2.0-only
5  * Author: Scott Wood <scottwood@freescale.com>
7  * Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
11  * Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
12  * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
14  * Vitaly Bordug <vbordug@ru.mvista.com>
57 	np = of_find_compatible_node(NULL, NULL, "fsl,cpm-muram-data");  in cpm_muram_init()
60 		np = of_find_node_by_name(NULL, "data-only");  in cpm_muram_init()
63 			ret = -ENODEV;  in cpm_muram_init()
68 	muram_pool = gen_pool_create(0, -1);  in cpm_muram_init()
71 		ret = -ENOMEM;  in cpm_muram_init()
77 		ret = -ENODEV;  in cpm_muram_init()
84 		ret = gen_pool_add(muram_pool, r.start - muram_pbase +  in cpm_muram_init()
85 				   GENPOOL_OFFSET, resource_size(&r), -1);  in cpm_muram_init()
92 	muram_vbase = ioremap(muram_pbase, max - muram_pbase + 1);  in cpm_muram_init()
95 		ret = -ENOMEM;  in cpm_muram_init()
107  * cpm_muram_alloc_common - cpm_muram_alloc common code
112  * This function returns a non-negative offset into the muram area, or
123 		return -ENOMEM;  in cpm_muram_alloc_common()
127 		return -ENOMEM;  in cpm_muram_alloc_common()
129 	start = start - GENPOOL_OFFSET;  in cpm_muram_alloc_common()
131 	entry->start = start;  in cpm_muram_alloc_common()
132 	entry->size = size;  in cpm_muram_alloc_common()
133 	list_add(&entry->head, &muram_block_list);  in cpm_muram_alloc_common()
139  * cpm_muram_alloc - allocate the requested size worth of multi-user ram
143  * This function returns a non-negative offset into the muram area, or
164  * cpm_muram_free - free a chunk of multi-user ram
165  * @offset: The beginning of the chunk as returned by cpm_muram_alloc().
167 void cpm_muram_free(s32 offset)  in cpm_muram_free()  argument
173 	if (offset < 0)  in cpm_muram_free()
179 		if (tmp->start == offset) {  in cpm_muram_free()
180 			size = tmp->size;  in cpm_muram_free()
181 			list_del(&tmp->head);  in cpm_muram_free()
186 	gen_pool_free(muram_pool, offset + GENPOOL_OFFSET, size);  in cpm_muram_free()
199  * devm_cpm_muram_alloc - Resource-managed cpm_muram_alloc
204  * This function returns a non-negative offset into the muram area, or
209  * resource-managed version is automatically freed on driver detach and so,
220 		return -ENOMEM;  in devm_cpm_muram_alloc()
235  * cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
236  * @offset: offset of allocation start address
238  * This function returns @offset if the area was available, a negative
243 s32 cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)  in cpm_muram_alloc_fixed()  argument
250 	muram_pool_data_fixed.offset = offset + GENPOOL_OFFSET;  in cpm_muram_alloc_fixed()
259  * devm_cpm_muram_alloc_fixed - Resource-managed cpm_muram_alloc_fixed
261  * @offset: offset of allocation start address
264  * This function returns a non-negative offset into the muram area, or
269  * resource-managed version is automatically freed on driver detach and so,
272 s32 devm_cpm_muram_alloc_fixed(struct device *dev, unsigned long offset,  in devm_cpm_muram_alloc_fixed()  argument
280 		return -ENOMEM;  in devm_cpm_muram_alloc_fixed()
282 	info = cpm_muram_alloc_fixed(offset, size);  in devm_cpm_muram_alloc_fixed()
295  * cpm_muram_addr - turn a muram offset into a virtual address
296  * @offset: muram offset to convert
298 void __iomem *cpm_muram_addr(unsigned long offset)  in cpm_muram_addr()  argument
300 	return muram_vbase + offset;  in cpm_muram_addr()
306 	return addr - muram_vbase;  in cpm_muram_offset()
311  * cpm_muram_dma - turn a muram virtual address into a DMA address
316 	return muram_pbase + (addr - muram_vbase);  in cpm_muram_dma()
322  * muram offset.