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/*
* Copyright (c) 2019 Nutanix Inc. All rights reserved.
*
* Authors: Thanos Makatos <thanos@nutanix.com>
* Swapnil Ingle <swapnil.ingle@nutanix.com>
* Felipe Franciosi <felipe@nutanix.com>
*
* 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 Nutanix 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 <COPYRIGHT HOLDER> 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, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (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 LIB_VFIO_USER_PRIVATE_H
#define LIB_VFIO_USER_PRIVATE_H
#include "dma.h"
static inline int
ERROR(int err)
{
errno = err;
return -1;
}
struct transport_ops {
int (*init)(vfu_ctx_t*);
int (*attach)(vfu_ctx_t*);
int(*detach)(vfu_ctx_t*);
int (*get_request)(vfu_ctx_t*, struct vfio_user_header*,
int *fds, size_t *nr_fds);
};
typedef enum {
IRQ_NONE = 0,
IRQ_INTX,
IRQ_MSI,
IRQ_MSIX,
} irq_type_t;
typedef struct {
irq_type_t type; /* irq type this device is using */
int err_efd; /* eventfd for irq err */
int req_efd; /* eventfd for irq req */
uint32_t max_ivs; /* maximum number of ivs supported */
int efds[0]; /* XXX must be last */
} vfu_irqs_t;
struct migration;
struct vfu_sparse_mmap_areas {
int nr_mmap_areas;
struct iovec areas[];
};
typedef struct {
/*
* Region flags, see VFU_REGION_FLAG_READ and friends.
*/
uint32_t flags;
/*
* Size of the region.
*/
uint32_t size;
/*
* Callback function that is called when the region is read or written.
* Note that the memory of the region is owned by the user, except for the
* standard header (first 64 bytes) of the PCI configuration space.
*/
vfu_region_access_cb_t *cb;
struct vfu_sparse_mmap_areas *mmap_areas; /* sparse mmap areas */
int fd;
} vfu_reg_info_t;
struct pci_dev {
vfu_pci_type_t type;
vfu_pci_config_space_t *config_space;
struct caps *caps;
};
struct vfu_ctx {
void *pvt;
dma_controller_t *dma;
int fd;
int conn_fd;
vfu_reset_cb_t *reset;
int log_level;
vfu_log_fn_t *log;
size_t nr_regions;
vfu_reg_info_t *reg_info;
struct pci_dev pci;
struct transport_ops *trans;
uint64_t flags;
char *uuid;
vfu_map_dma_cb_t *map_dma;
vfu_unmap_dma_cb_t *unmap_dma;
int client_max_fds;
vfu_reg_info_t *migr_reg;
struct migration *migration;
uint32_t irq_count[VFU_DEV_NUM_IRQS];
vfu_irqs_t *irqs;
bool realized;
vfu_dev_type_t dev_type;
};
void
dump_buffer(const char *prefix, const char *buf, uint32_t count);
vfu_reg_info_t *
vfu_get_region_info(vfu_ctx_t *vfu_ctx);
int
handle_dma_map_or_unmap(vfu_ctx_t *vfu_ctx, uint32_t size, bool map,
int *fds, size_t nr_fds,
struct vfio_user_dma_region *dma_regions);
void
_dma_controller_do_remove_region(dma_controller_t *dma,
dma_memory_region_t *region);
int
get_next_command(vfu_ctx_t *vfu_ctx, struct vfio_user_header *hdr, int *fds,
size_t *nr_fds);
int
exec_command(vfu_ctx_t *vfu_ctx, struct vfio_user_header *hdr, size_t size,
int *fds, size_t nr_fds, int **fds_out, size_t *nr_fds_out,
struct iovec *_iovecs, struct iovec **iovecs, size_t *nr_iovecs,
bool *free_iovec_data);
int
process_request(vfu_ctx_t *vfu_ctx);
int
consume_fd(int *fds, size_t nr_fds, size_t index);
int
handle_device_get_info(vfu_ctx_t *vfu_ctx, uint32_t size,
struct vfio_device_info *dev_info);
long
dev_get_reginfo(vfu_ctx_t *vfu_ctx, uint32_t index, uint32_t argsz,
struct vfio_region_info **vfio_reg, int **fds, size_t *nr_fds);
#endif /* LIB_VFIO_USER_PRIVATE_H */
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