fsl/qe/qe_common.c

1 // SPDX-License-Identifier: GPL-2.0-only
7  * Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
11  * Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
41 /* max address size we deal with */
58 	np = of_find_compatible_node(NULL, NULL, "fsl,cpm-muram-data");  in cpm_muram_init()
61 		np = of_find_node_by_name(NULL, "data-only");  in cpm_muram_init()
64 			ret = -ENODEV;  in cpm_muram_init()
69 	muram_pool = gen_pool_create(0, -1);  in cpm_muram_init()
72 		ret = -ENOMEM;  in cpm_muram_init()
78 		ret = -ENODEV;  in cpm_muram_init()
85 		ret = gen_pool_add(muram_pool, r.start - muram_pbase +  in cpm_muram_init()
86 				   GENPOOL_OFFSET, resource_size(&r), -1);  in cpm_muram_init()
93 	muram_vbase = ioremap(muram_pbase, max - muram_pbase + 1);  in cpm_muram_init()
96 		ret = -ENOMEM;  in cpm_muram_init()
108  * cpm_muram_alloc_common - cpm_muram_alloc common code
113  * This function returns a non-negative offset into the muram area, or
124 		return -ENOMEM;  in cpm_muram_alloc_common()
128 		return -ENOMEM;  in cpm_muram_alloc_common()
130 	start = start - GENPOOL_OFFSET;  in cpm_muram_alloc_common()
132 	entry->start = start;  in cpm_muram_alloc_common()
133 	entry->size = size;  in cpm_muram_alloc_common()
134 	list_add(&entry->head, &muram_block_list);  in cpm_muram_alloc_common()
140  * cpm_muram_alloc - allocate the requested size worth of multi-user ram
144  * This function returns a non-negative offset into the muram area, or
146  * Use cpm_dpram_addr() to get the virtual address of the area.
165  * cpm_muram_free - free a chunk of multi-user ram
180 		if (tmp->start == offset) {  in cpm_muram_free()
181 			size = tmp->size;  in cpm_muram_free()
182 			list_del(&tmp->head);  in cpm_muram_free()
193  * cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
194  * @offset: offset of allocation start address
198  * Use cpm_dpram_addr() to get the virtual address of the area.
217  * cpm_muram_addr - turn a muram offset into a virtual address
228 	return addr - (void __iomem *)muram_vbase;  in cpm_muram_offset()
233  * cpm_muram_dma - turn a muram virtual address into a DMA address
234  * @offset: virtual address from cpm_muram_addr() to convert
238 	return muram_pbase + ((u8 __iomem *)addr - muram_vbase);  in cpm_muram_dma()