39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2003-2004 Hewlett-Packard Co
|
||
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
||
|
|
* Copyright (C) 2012 ARM Ltd.
|
||
|
|
* Copyright (C) 2016 SiFive, Inc.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
#ifndef __ASM_RISCV_DMA_MAPPING_H
|
||
|
|
#define __ASM_RISCV_DMA_MAPPING_H
|
||
|
|
|
||
|
|
/* Use ops->dma_mapping_error (if it exists) or assume success */
|
||
|
|
// #undef DMA_ERROR_CODE
|
||
|
|
|
||
|
|
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
|
||
|
|
{
|
||
|
|
return &dma_noop_ops;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
|
||
|
|
{
|
||
|
|
if (!dev->dma_mask)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return addr + size - 1 <= *dev->dma_mask;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __ASM_RISCV_DMA_MAPPING_H */
|