Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Logan Gunthorpe |
402 |
75.85% |
2 |
11.11% |
| Linus Torvalds (pre-git) |
66 |
12.45% |
1 |
5.56% |
| Russell King |
12 |
2.26% |
1 |
5.56% |
| Stanislaw Gruszka |
10 |
1.89% |
1 |
5.56% |
| Sebastian Andrzej Siewior |
8 |
1.51% |
1 |
5.56% |
| Dan J Williams |
8 |
1.51% |
2 |
11.11% |
| Jacek Lawrynowicz |
6 |
1.13% |
1 |
5.56% |
| Emil Medve |
4 |
0.75% |
1 |
5.56% |
| Christoph Hellwig |
4 |
0.75% |
2 |
11.11% |
| Alex Williamson |
3 |
0.57% |
1 |
5.56% |
| Christoph Lameter |
2 |
0.38% |
1 |
5.56% |
| Bryan O'Sullivan |
2 |
0.38% |
1 |
5.56% |
| Yu Zhao |
2 |
0.38% |
2 |
11.11% |
| Greg Kroah-Hartman |
1 |
0.19% |
1 |
5.56% |
| Total |
530 |
|
18 |
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* PCI Peer 2 Peer DMA support.
*
* Copyright (c) 2016-2018, Logan Gunthorpe
* Copyright (c) 2016-2017, Microsemi Corporation
* Copyright (c) 2017, Christoph Hellwig
* Copyright (c) 2018, Eideticom Inc.
*/
#ifndef _LINUX_PCI_P2PDMA_H
#define _LINUX_PCI_P2PDMA_H
#include <linux/pci.h>
struct block_device;
struct scatterlist;
#ifdef CONFIG_PCI_P2PDMA
int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar, size_t size,
u64 offset);
int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients,
int num_clients, bool verbose);
bool pci_has_p2pmem(struct pci_dev *pdev);
struct pci_dev *pci_p2pmem_find_many(struct device **clients, int num_clients);
void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size);
void pci_free_p2pmem(struct pci_dev *pdev, void *addr, size_t size);
pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev, void *addr);
struct scatterlist *pci_p2pmem_alloc_sgl(struct pci_dev *pdev,
unsigned int *nents, u32 length);
void pci_p2pmem_free_sgl(struct pci_dev *pdev, struct scatterlist *sgl);
void pci_p2pmem_publish(struct pci_dev *pdev, bool publish);
int pci_p2pdma_enable_store(const char *page, struct pci_dev **p2p_dev,
bool *use_p2pdma);
ssize_t pci_p2pdma_enable_show(char *page, struct pci_dev *p2p_dev,
bool use_p2pdma);
#else /* CONFIG_PCI_P2PDMA */
static inline int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar,
size_t size, u64 offset)
{
return -EOPNOTSUPP;
}
static inline int pci_p2pdma_distance_many(struct pci_dev *provider,
struct device **clients, int num_clients, bool verbose)
{
return -1;
}
static inline bool pci_has_p2pmem(struct pci_dev *pdev)
{
return false;
}
static inline struct pci_dev *pci_p2pmem_find_many(struct device **clients,
int num_clients)
{
return NULL;
}
static inline void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size)
{
return NULL;
}
static inline void pci_free_p2pmem(struct pci_dev *pdev, void *addr,
size_t size)
{
}
static inline pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev,
void *addr)
{
return 0;
}
static inline struct scatterlist *pci_p2pmem_alloc_sgl(struct pci_dev *pdev,
unsigned int *nents, u32 length)
{
return NULL;
}
static inline void pci_p2pmem_free_sgl(struct pci_dev *pdev,
struct scatterlist *sgl)
{
}
static inline void pci_p2pmem_publish(struct pci_dev *pdev, bool publish)
{
}
static inline int pci_p2pdma_enable_store(const char *page,
struct pci_dev **p2p_dev, bool *use_p2pdma)
{
*use_p2pdma = false;
return 0;
}
static inline ssize_t pci_p2pdma_enable_show(char *page,
struct pci_dev *p2p_dev, bool use_p2pdma)
{
return sprintf(page, "none\n");
}
#endif /* CONFIG_PCI_P2PDMA */
static inline int pci_p2pdma_distance(struct pci_dev *provider,
struct device *client, bool verbose)
{
return pci_p2pdma_distance_many(provider, &client, 1, verbose);
}
static inline struct pci_dev *pci_p2pmem_find(struct device *client)
{
return pci_p2pmem_find_many(&client, 1);
}
#endif /* _LINUX_PCI_P2P_H */