1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (c) 2018, Microsoft Corporation.
6 #ifndef _VMBUS_PRIVATE_H_
7 #define _VMBUS_PRIVATE_H_
12 #include <rte_vmbus_reg.h>
13 #include <rte_bus_vmbus.h>
16 #define PAGE_SIZE 4096
19 extern struct rte_vmbus_bus rte_vmbus_bus;
21 extern int vmbus_logtype_bus;
22 #define VMBUS_LOG(level, fmt, args...) \
23 rte_log(RTE_LOG_ ## level, vmbus_logtype_bus, "%s(): " fmt "\n", \
27 struct vmbus_bufring *vbr;
29 uint32_t windex; /* next available location */
32 #define UIO_NAME_MAX 64
35 void *addr; /* user mmap of resource */
36 uint64_t size; /* length */
40 * For multi-process we need to reproduce all vmbus mappings in secondary
41 * processes, so save them in a tailq.
43 struct mapped_vmbus_resource {
44 TAILQ_ENTRY(mapped_vmbus_resource) next;
48 struct vmbus_map maps[VMBUS_MAX_RESOURCE];
52 TAILQ_HEAD(mapped_vmbus_res_list, mapped_vmbus_resource);
54 #define HV_MON_TRIG_LEN 32
55 #define HV_MON_TRIG_MAX 4
57 struct vmbus_channel {
58 STAILQ_HEAD(, vmbus_channel) subchannel_list;
59 STAILQ_ENTRY(vmbus_channel) next;
60 const struct rte_vmbus_device *device;
66 uint16_t subchannel_id;
70 #define VMBUS_MAX_CHANNELS 64
73 vmbus_devargs_lookup(struct rte_vmbus_device *dev);
75 int vmbus_chan_create(const struct rte_vmbus_device *device,
76 uint16_t relid, uint16_t subid, uint8_t monitor_id,
77 struct vmbus_channel **new_chan);
79 void vmbus_add_device(struct rte_vmbus_device *vmbus_dev);
80 void vmbus_insert_device(struct rte_vmbus_device *exist_vmbus_dev,
81 struct rte_vmbus_device *new_vmbus_dev);
82 void vmbus_remove_device(struct rte_vmbus_device *vmbus_device);
84 void vmbus_uio_irq_control(struct rte_vmbus_device *dev, int32_t onoff);
85 int vmbus_uio_irq_read(struct rte_vmbus_device *dev);
87 int vmbus_uio_map_resource(struct rte_vmbus_device *dev);
88 void vmbus_uio_unmap_resource(struct rte_vmbus_device *dev);
90 int vmbus_uio_alloc_resource(struct rte_vmbus_device *dev,
91 struct mapped_vmbus_resource **uio_res);
92 void vmbus_uio_free_resource(struct rte_vmbus_device *dev,
93 struct mapped_vmbus_resource *uio_res);
95 struct mapped_vmbus_resource *
96 vmbus_uio_find_resource(const struct rte_vmbus_device *dev);
97 int vmbus_uio_map_resource_by_index(struct rte_vmbus_device *dev, int res_idx,
98 struct mapped_vmbus_resource *uio_res,
101 void *vmbus_map_resource(void *requested_addr, int fd, off_t offset,
102 size_t size, int additional_flags);
103 void vmbus_unmap_resource(void *requested_addr, size_t size);
105 bool vmbus_uio_subchannels_supported(const struct rte_vmbus_device *dev,
106 const struct vmbus_channel *chan);
107 int vmbus_uio_get_subchan(struct vmbus_channel *primary,
108 struct vmbus_channel **subchan);
109 int vmbus_uio_map_rings(struct vmbus_channel *chan);
111 void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen);
113 /* Amount of space available for write */
114 static inline uint32_t
115 vmbus_br_availwrite(const struct vmbus_br *br, uint32_t windex)
117 uint32_t rindex = br->vbr->rindex;
119 if (windex >= rindex)
120 return br->dsize - (windex - rindex);
122 return rindex - windex;
125 static inline uint32_t
126 vmbus_br_availread(const struct vmbus_br *br)
128 return br->dsize - vmbus_br_availwrite(br, br->vbr->windex);
131 int vmbus_txbr_write(struct vmbus_br *tbr, const struct iovec iov[], int iovlen,
134 int vmbus_rxbr_peek(const struct vmbus_br *rbr, void *data, size_t dlen);
136 int vmbus_rxbr_read(struct vmbus_br *rbr, void *data, size_t dlen, size_t hlen);
138 #endif /* _VMBUS_PRIVATE_H_ */