fsl/qe/qe_common.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Common CPM code
7  * Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
11  * Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
56 	np = of_find_compatible_node(NULL, NULL, "fsl,cpm-muram-data");  in cpm_muram_init()
59 		np = of_find_node_by_name(NULL, "data-only");  in cpm_muram_init()
62 			ret = -ENODEV;  in cpm_muram_init()
67 	muram_pool = gen_pool_create(0, -1);  in cpm_muram_init()
70 		ret = -ENOMEM;  in cpm_muram_init()
76 		ret = -ENODEV;  in cpm_muram_init()
83 		ret = gen_pool_add(muram_pool, r.start - muram_pbase +  in cpm_muram_init()
84 				   GENPOOL_OFFSET, resource_size(&r), -1);  in cpm_muram_init()
91 	muram_vbase = ioremap(muram_pbase, max - muram_pbase + 1);  in cpm_muram_init()
94 		ret = -ENOMEM;  in cpm_muram_init()
106  * cpm_muram_alloc_common - cpm_muram_alloc common code
111  * This function returns a non-negative offset into the muram area, or
114 static s32 cpm_muram_alloc_common(unsigned long size,  in cpm_muram_alloc_common()
122 		return -ENOMEM;  in cpm_muram_alloc_common()
126 		return -ENOMEM;  in cpm_muram_alloc_common()
128 	start = start - GENPOOL_OFFSET;  in cpm_muram_alloc_common()
130 	entry->start = start;  in cpm_muram_alloc_common()
131 	entry->size = size;  in cpm_muram_alloc_common()
132 	list_add(&entry->head, &muram_block_list);  in cpm_muram_alloc_common()
138  * cpm_muram_alloc - allocate the requested size worth of multi-user ram
142  * This function returns a non-negative offset into the muram area, or
147 s32 cpm_muram_alloc(unsigned long size, unsigned long align)  in cpm_muram_alloc()
150 	unsigned long flags;  in cpm_muram_alloc()
163  * cpm_muram_free - free a chunk of multi-user ram
168 	unsigned long flags;  in cpm_muram_free()
178 		if (tmp->start == offset) {  in cpm_muram_free()
179 			size = tmp->size;  in cpm_muram_free()
180 			list_del(&tmp->head);  in cpm_muram_free()
191  * cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
199 s32 cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)  in cpm_muram_alloc_fixed()
202 	unsigned long flags;  in cpm_muram_alloc_fixed()
215  * cpm_muram_addr - turn a muram offset into a virtual address
218 void __iomem *cpm_muram_addr(unsigned long offset)  in cpm_muram_addr()
224 unsigned long cpm_muram_offset(const void __iomem *addr)  in cpm_muram_offset()
226 	return addr - muram_vbase;  in cpm_muram_offset()
231  * cpm_muram_dma - turn a muram virtual address into a DMA address
236 	return muram_pbase + (addr - muram_vbase);  in cpm_muram_dma()