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 */
36 #define UIO_MAX_SUBCHANNEL 128
37 struct subchannel_map {
44 * For multi-process we need to reproduce all vmbus mappings in secondary
45 * processes, so save them in a tailq.
47 struct mapped_vmbus_resource {
48 TAILQ_ENTRY(mapped_vmbus_resource) next;
53 struct vmbus_map maps[VMBUS_MAX_RESOURCE];
58 struct subchannel_map subchannel_maps[UIO_MAX_SUBCHANNEL];
61 TAILQ_HEAD(mapped_vmbus_res_list, mapped_vmbus_resource);
63 #define HV_MON_TRIG_LEN 32
64 #define HV_MON_TRIG_MAX 4
66 struct vmbus_channel {
67 STAILQ_HEAD(, vmbus_channel) subchannel_list;
68 STAILQ_ENTRY(vmbus_channel) next;
69 const struct rte_vmbus_device *device;
75 uint16_t subchannel_id;
79 #define VMBUS_MAX_CHANNELS 64
82 vmbus_devargs_lookup(struct rte_vmbus_device *dev);
84 int vmbus_chan_create(const struct rte_vmbus_device *device,
85 uint16_t relid, uint16_t subid, uint8_t monitor_id,
86 struct vmbus_channel **new_chan);
88 void vmbus_add_device(struct rte_vmbus_device *vmbus_dev);
89 void vmbus_insert_device(struct rte_vmbus_device *exist_vmbus_dev,
90 struct rte_vmbus_device *new_vmbus_dev);
91 void vmbus_remove_device(struct rte_vmbus_device *vmbus_device);
93 void vmbus_uio_irq_control(struct rte_vmbus_device *dev, int32_t onoff);
94 int vmbus_uio_irq_read(struct rte_vmbus_device *dev);
96 int vmbus_uio_map_resource(struct rte_vmbus_device *dev);
97 void vmbus_uio_unmap_resource(struct rte_vmbus_device *dev);
99 int vmbus_uio_alloc_resource(struct rte_vmbus_device *dev,
100 struct mapped_vmbus_resource **uio_res);
101 void vmbus_uio_free_resource(struct rte_vmbus_device *dev,
102 struct mapped_vmbus_resource *uio_res);
104 struct mapped_vmbus_resource *
105 vmbus_uio_find_resource(const struct rte_vmbus_device *dev);
106 int vmbus_uio_map_resource_by_index(struct rte_vmbus_device *dev, int res_idx,
107 struct mapped_vmbus_resource *uio_res,
110 void *vmbus_map_resource(void *requested_addr, int fd, off_t offset,
111 size_t size, int additional_flags);
112 void vmbus_unmap_resource(void *requested_addr, size_t size);
114 bool vmbus_uio_subchannels_supported(const struct rte_vmbus_device *dev,
115 const struct vmbus_channel *chan);
116 int vmbus_uio_get_subchan(struct vmbus_channel *primary,
117 struct vmbus_channel **subchan);
118 int vmbus_uio_map_rings(struct vmbus_channel *chan);
120 void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen);
122 /* Amount of space available for write */
123 static inline uint32_t
124 vmbus_br_availwrite(const struct vmbus_br *br, uint32_t windex)
126 uint32_t rindex = br->vbr->rindex;
128 if (windex >= rindex)
129 return br->dsize - (windex - rindex);
131 return rindex - windex;
134 static inline uint32_t
135 vmbus_br_availread(const struct vmbus_br *br)
137 return br->dsize - vmbus_br_availwrite(br, br->vbr->windex);
140 int vmbus_txbr_write(struct vmbus_br *tbr, const struct iovec iov[], int iovlen,
143 int vmbus_rxbr_peek(const struct vmbus_br *rbr, void *data, size_t dlen);
145 int vmbus_rxbr_read(struct vmbus_br *rbr, void *data, size_t dlen, size_t hlen);
147 #endif /* _VMBUS_PRIVATE_H_ */