numam-dpdk/lib/librte_eal/linuxapp/eal/eal_pci_init.h

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef EAL_PCI_INIT_H_
#define EAL_PCI_INIT_H_

#include "eal_vfio.h"

/*
 * Helper function to map PCI resources right after hugepages in virtual memory
 */
extern void *pci_map_addr;
void *pci_find_max_end_va(void);

int pci_uio_alloc_resource(struct rte_pci_device *dev,
		struct mapped_pci_resource **uio_res);
void pci_uio_free_resource(struct rte_pci_device *dev,
		struct mapped_pci_resource *uio_res);
int pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
		struct mapped_pci_resource *uio_res, int map_idx);

int pci_uio_read_config(const struct rte_intr_handle *intr_handle,
			void *buf, size_t len, off_t offs);
int pci_uio_write_config(const struct rte_intr_handle *intr_handle,
			 const void *buf, size_t len, off_t offs);

#ifdef VFIO_PRESENT

#define VFIO_MAX_GROUPS 64

int pci_vfio_enable(void);
int pci_vfio_is_enabled(void);
int pci_vfio_mp_sync_setup(void);

/* access config space */
int pci_vfio_read_config(const struct rte_intr_handle *intr_handle,
			 void *buf, size_t len, off_t offs);
int pci_vfio_write_config(const struct rte_intr_handle *intr_handle,
			  const void *buf, size_t len, off_t offs);

/* map VFIO resource prototype */
int pci_vfio_map_resource(struct rte_pci_device *dev);
int pci_vfio_get_group_fd(int iommu_group_fd);
int pci_vfio_get_container_fd(void);

/*
 * Function prototypes for VFIO multiprocess sync functions
 */
int vfio_mp_sync_send_request(int socket, int req);
int vfio_mp_sync_receive_request(int socket);
int vfio_mp_sync_send_fd(int socket, int fd);
int vfio_mp_sync_receive_fd(int socket);
int vfio_mp_sync_connect_to_primary(void);

/* socket comm protocol definitions */
#define SOCKET_REQ_CONTAINER 0x100
#define SOCKET_REQ_GROUP 0x200
#define SOCKET_OK 0x0
#define SOCKET_NO_FD 0x1
#define SOCKET_ERR 0xFF

/*
 * we don't need to store device fd's anywhere since they can be obtained from
 * the group fd via an ioctl() call.
 */
struct vfio_group {
	int group_no;
	int fd;
};

struct vfio_config {
	int vfio_enabled;
	int vfio_container_fd;
	int vfio_container_has_dma;
	int vfio_group_idx;
	struct vfio_group vfio_groups[VFIO_MAX_GROUPS];
};

#endif

#endif /* EAL_PCI_INIT_H_ */