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_eal_paging.h>
13 #include <rte_vmbus_reg.h>
14 #include <rte_bus_vmbus.h>
16 extern struct rte_vmbus_bus rte_vmbus_bus;
18 extern int vmbus_logtype_bus;
19 #define VMBUS_LOG(level, fmt, args...) \
20 rte_log(RTE_LOG_ ## level, vmbus_logtype_bus, "%s(): " fmt "\n", \
24 struct vmbus_bufring *vbr;
26 uint32_t windex; /* next available location */
29 #define UIO_NAME_MAX 64
32 void *addr; /* user mmap of resource */
33 uint64_t size; /* length */
37 * For multi-process we need to reproduce all vmbus mappings in secondary
38 * processes, so save them in a tailq.
40 struct mapped_vmbus_resource {
41 TAILQ_ENTRY(mapped_vmbus_resource) next;
45 struct vmbus_channel *primary;
46 struct vmbus_map maps[VMBUS_MAX_RESOURCE];
50 TAILQ_HEAD(mapped_vmbus_res_list, mapped_vmbus_resource);
52 #define HV_MON_TRIG_LEN 32
53 #define HV_MON_TRIG_MAX 4
55 struct vmbus_channel {
56 STAILQ_HEAD(, vmbus_channel) subchannel_list;
57 STAILQ_ENTRY(vmbus_channel) next;
58 const struct rte_vmbus_device *device;
64 uint16_t subchannel_id;
68 #define VMBUS_MAX_CHANNELS 64
71 vmbus_devargs_lookup(struct rte_vmbus_device *dev);
73 int vmbus_chan_create(const struct rte_vmbus_device *device,
74 uint16_t relid, uint16_t subid, uint8_t monitor_id,
75 struct vmbus_channel **new_chan);
77 void vmbus_add_device(struct rte_vmbus_device *vmbus_dev);
78 void vmbus_insert_device(struct rte_vmbus_device *exist_vmbus_dev,
79 struct rte_vmbus_device *new_vmbus_dev);
80 void vmbus_remove_device(struct rte_vmbus_device *vmbus_device);
82 void vmbus_uio_irq_control(struct rte_vmbus_device *dev, int32_t onoff);
83 int vmbus_uio_irq_read(struct rte_vmbus_device *dev);
85 int vmbus_uio_map_resource(struct rte_vmbus_device *dev);
86 void vmbus_uio_unmap_resource(struct rte_vmbus_device *dev);
88 int vmbus_uio_alloc_resource(struct rte_vmbus_device *dev,
89 struct mapped_vmbus_resource **uio_res);
90 void vmbus_uio_free_resource(struct rte_vmbus_device *dev,
91 struct mapped_vmbus_resource *uio_res);
93 struct mapped_vmbus_resource *
94 vmbus_uio_find_resource(const struct rte_vmbus_device *dev);
95 int vmbus_uio_map_resource_by_index(struct rte_vmbus_device *dev, int res_idx,
96 struct mapped_vmbus_resource *uio_res,
99 void *vmbus_map_resource(void *requested_addr, int fd, off_t offset,
100 size_t size, int additional_flags);
101 void vmbus_unmap_resource(void *requested_addr, size_t size);
103 bool vmbus_uio_subchannels_supported(const struct rte_vmbus_device *dev,
104 const struct vmbus_channel *chan);
105 int vmbus_uio_get_subchan(struct vmbus_channel *primary,
106 struct vmbus_channel **subchan);
107 int vmbus_uio_map_rings(struct vmbus_channel *chan);
108 int vmbus_uio_map_secondary_subchan(const struct rte_vmbus_device *dev,
109 const 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_ */