166 lines
5.3 KiB
C
166 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* VMware VMCI Driver
|
|
*
|
|
* Copyright (C) 2012 VMware, Inc. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _VMCI_QUEUE_PAIR_H_
|
|
#define _VMCI_QUEUE_PAIR_H_
|
|
|
|
#include <linux/vmw_vmci_defs.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "vmci_context.h"
|
|
|
|
/* Callback needed for correctly waiting on events. */
|
|
typedef int (*vmci_event_release_cb) (void *client_data);
|
|
|
|
/* Guest device port I/O. */
|
|
struct ppn_set {
|
|
u64 num_produce_pages;
|
|
u64 num_consume_pages;
|
|
u64 *produce_ppns;
|
|
u64 *consume_ppns;
|
|
bool initialized;
|
|
};
|
|
|
|
/* VMCIqueue_pairAllocInfo */
|
|
struct vmci_qp_alloc_info {
|
|
struct vmci_handle handle;
|
|
u32 peer;
|
|
u32 flags;
|
|
u64 produce_size;
|
|
u64 consume_size;
|
|
u64 ppn_va; /* Start VA of queue pair PPNs. */
|
|
u64 num_ppns;
|
|
s32 result;
|
|
u32 version;
|
|
};
|
|
|
|
/* VMCIqueue_pairSetVAInfo */
|
|
struct vmci_qp_set_va_info {
|
|
struct vmci_handle handle;
|
|
u64 va; /* Start VA of queue pair PPNs. */
|
|
u64 num_ppns;
|
|
u32 version;
|
|
s32 result;
|
|
};
|
|
|
|
/*
|
|
* For backwards compatibility, here is a version of the
|
|
* VMCIqueue_pairPageFileInfo before host support end-points was added.
|
|
* Note that the current version of that structure requires VMX to
|
|
* pass down the VA of the mapped file. Before host support was added
|
|
* there was nothing of the sort. So, when the driver sees the ioctl
|
|
* with a parameter that is the sizeof
|
|
* VMCIqueue_pairPageFileInfo_NoHostQP then it can infer that the version
|
|
* of VMX running can't attach to host end points because it doesn't
|
|
* provide the VA of the mapped files.
|
|
*
|
|
* The Linux driver doesn't get an indication of the size of the
|
|
* structure passed down from user space. So, to fix a long standing
|
|
* but unfiled bug, the _pad field has been renamed to version.
|
|
* Existing versions of VMX always initialize the PageFileInfo
|
|
* structure so that _pad, er, version is set to 0.
|
|
*
|
|
* A version value of 1 indicates that the size of the structure has
|
|
* been increased to include two UVA's: produce_uva and consume_uva.
|
|
* These UVA's are of the mmap()'d queue contents backing files.
|
|
*
|
|
* In addition, if when VMX is sending down the
|
|
* VMCIqueue_pairPageFileInfo structure it gets an error then it will
|
|
* try again with the _NoHostQP version of the file to see if an older
|
|
* VMCI kernel module is running.
|
|
*/
|
|
|
|
/* VMCIqueue_pairPageFileInfo */
|
|
struct vmci_qp_page_file_info {
|
|
struct vmci_handle handle;
|
|
u64 produce_page_file; /* User VA. */
|
|
u64 consume_page_file; /* User VA. */
|
|
u64 produce_page_file_size; /* Size of the file name array. */
|
|
u64 consume_page_file_size; /* Size of the file name array. */
|
|
s32 result;
|
|
u32 version; /* Was _pad. */
|
|
u64 produce_va; /* User VA of the mapped file. */
|
|
u64 consume_va; /* User VA of the mapped file. */
|
|
};
|
|
|
|
/* vmci queuepair detach info */
|
|
struct vmci_qp_dtch_info {
|
|
struct vmci_handle handle;
|
|
s32 result;
|
|
u32 _pad;
|
|
};
|
|
|
|
/*
|
|
* struct vmci_qp_page_store describes how the memory of a given queue pair
|
|
* is backed. When the queue pair is between the host and a guest, the
|
|
* page store consists of references to the guest pages. On vmkernel,
|
|
* this is a list of PPNs, and on hosted, it is a user VA where the
|
|
* queue pair is mapped into the VMX address space.
|
|
*/
|
|
struct vmci_qp_page_store {
|
|
/* Reference to pages backing the queue pair. */
|
|
u64 pages;
|
|
/* Length of pageList/virtual addres range (in pages). */
|
|
u32 len;
|
|
};
|
|
|
|
/*
|
|
* This data type contains the information about a queue.
|
|
* There are two queues (hence, queue pairs) per transaction model between a
|
|
* pair of end points, A & B. One queue is used by end point A to transmit
|
|
* commands and responses to B. The other queue is used by B to transmit
|
|
* commands and responses.
|
|
*
|
|
* struct vmci_queue_kern_if is a per-OS defined Queue structure. It contains
|
|
* either a direct pointer to the linear address of the buffer contents or a
|
|
* pointer to structures which help the OS locate those data pages. See
|
|
* vmciKernelIf.c for each platform for its definition.
|
|
*/
|
|
struct vmci_queue {
|
|
struct vmci_queue_header *q_header;
|
|
struct vmci_queue_header *saved_header;
|
|
struct vmci_queue_kern_if *kernel_if;
|
|
};
|
|
|
|
/*
|
|
* Utility function that checks whether the fields of the page
|
|
* store contain valid values.
|
|
* Result:
|
|
* true if the page store is wellformed. false otherwise.
|
|
*/
|
|
static inline bool
|
|
VMCI_QP_PAGESTORE_IS_WELLFORMED(struct vmci_qp_page_store *page_store)
|
|
{
|
|
return page_store->len >= 2;
|
|
}
|
|
|
|
void vmci_qp_broker_exit(void);
|
|
int vmci_qp_broker_alloc(struct vmci_handle handle, u32 peer,
|
|
u32 flags, u32 priv_flags,
|
|
u64 produce_size, u64 consume_size,
|
|
struct vmci_qp_page_store *page_store,
|
|
struct vmci_ctx *context);
|
|
int vmci_qp_broker_set_page_store(struct vmci_handle handle,
|
|
u64 produce_uva, u64 consume_uva,
|
|
struct vmci_ctx *context);
|
|
int vmci_qp_broker_detach(struct vmci_handle handle, struct vmci_ctx *context);
|
|
|
|
void vmci_qp_guest_endpoints_exit(void);
|
|
|
|
int vmci_qp_alloc(struct vmci_handle *handle,
|
|
struct vmci_queue **produce_q, u64 produce_size,
|
|
struct vmci_queue **consume_q, u64 consume_size,
|
|
u32 peer, u32 flags, u32 priv_flags,
|
|
bool guest_endpoint, vmci_event_release_cb wakeup_cb,
|
|
void *client_data);
|
|
int vmci_qp_broker_map(struct vmci_handle handle,
|
|
struct vmci_ctx *context, u64 guest_mem);
|
|
int vmci_qp_broker_unmap(struct vmci_handle handle,
|
|
struct vmci_ctx *context, u32 gid);
|
|
|
|
#endif /* _VMCI_QUEUE_PAIR_H_ */
|