Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
34 lines
1012 B
C
34 lines
1012 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
|
|
#ifndef LINUX_HMM_DMA_H
|
|
#define LINUX_HMM_DMA_H
|
|
|
|
#include <linux/dma-mapping.h>
|
|
|
|
struct dma_iova_state;
|
|
struct pci_p2pdma_map_state;
|
|
|
|
/*
|
|
* struct hmm_dma_map - array of PFNs and DMA addresses
|
|
*
|
|
* @state: DMA IOVA state
|
|
* @pfns: array of PFNs
|
|
* @dma_list: array of DMA addresses
|
|
* @dma_entry_size: size of each DMA entry in the array
|
|
*/
|
|
struct hmm_dma_map {
|
|
struct dma_iova_state state;
|
|
unsigned long *pfn_list;
|
|
dma_addr_t *dma_list;
|
|
size_t dma_entry_size;
|
|
};
|
|
|
|
int hmm_dma_map_alloc(struct device *dev, struct hmm_dma_map *map,
|
|
size_t nr_entries, size_t dma_entry_size);
|
|
void hmm_dma_map_free(struct device *dev, struct hmm_dma_map *map);
|
|
dma_addr_t hmm_dma_map_pfn(struct device *dev, struct hmm_dma_map *map,
|
|
size_t idx,
|
|
struct pci_p2pdma_map_state *p2pdma_state);
|
|
bool hmm_dma_unmap_pfn(struct device *dev, struct hmm_dma_map *map, size_t idx);
|
|
#endif /* LINUX_HMM_DMA_H */
|