mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
7f73eac3a7
Add pci_p2pdma_unmap_sg() to the two places that call pci_p2pdma_map_sg(). This is a prep patch to introduce correct mappings for p2pdma transactions that go through the root complex. Link: https://lore.kernel.org/r/20190730163545.4915-10-logang@deltatee.com Link: https://lore.kernel.org/r/20190812173048.9186-10-logang@deltatee.com Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/* 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_map_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir, unsigned long attrs);
|
|
void pci_p2pdma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir, unsigned long attrs);
|
|
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_map_sg_attrs(struct device *dev,
|
|
struct scatterlist *sg, int nents, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void pci_p2pdma_unmap_sg_attrs(struct device *dev,
|
|
struct scatterlist *sg, int nents, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
}
|
|
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);
|
|
}
|
|
|
|
static inline int pci_p2pdma_map_sg(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir)
|
|
{
|
|
return pci_p2pdma_map_sg_attrs(dev, sg, nents, dir, 0);
|
|
}
|
|
|
|
static inline void pci_p2pdma_unmap_sg(struct device *dev,
|
|
struct scatterlist *sg, int nents, enum dma_data_direction dir)
|
|
{
|
|
pci_p2pdma_unmap_sg_attrs(dev, sg, nents, dir, 0);
|
|
}
|
|
|
|
#endif /* _LINUX_PCI_P2P_H */
|