2 * Copyright (c) 2016 Microsoft Corp.
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6 * modification, are permitted provided that the following conditions
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29 #ifndef _VMBUS_CHANVAR_H_
30 #define _VMBUS_CHANVAR_H_
32 #include <sys/param.h>
34 #include <sys/mutex.h>
35 #include <sys/queue.h>
36 #include <sys/taskqueue.h>
37 #include <sys/sysctl.h>
39 #include <dev/hyperv/include/hyperv.h>
40 #include <dev/hyperv/include/hyperv_busdma.h>
41 #include <dev/hyperv/include/vmbus.h>
42 #include <dev/hyperv/vmbus/vmbus_brvar.h>
44 struct vmbus_channel {
47 * Fields before ch_txbr are only accessed on this channel's
50 uint32_t ch_flags; /* VMBUS_CHAN_FLAG_ */
53 * RX bufring; immediately following ch_txbr.
55 struct vmbus_rxbr ch_rxbr;
57 struct taskqueue *ch_tq;
59 vmbus_chan_callback_t ch_cb;
63 * TX bufring; at the beginning of ch_bufring.
66 * Put TX bufring and the following MNF/evtflag to a new
67 * cacheline, since they will be accessed on all CPUs by
68 * locking ch_txbr first.
71 * TX bufring and following MNF/evtflags do _not_ fit in
74 struct vmbus_txbr ch_txbr __aligned(CACHE_LINE_SIZE);
75 uint32_t ch_txflags; /* VMBUS_CHAN_TXF_ */
78 * These are based on the vmbus_chanmsg_choffer.chm_montrig.
79 * Save it here for easy access.
81 uint32_t ch_montrig_mask;/* MNF trig mask */
82 volatile uint32_t *ch_montrig; /* MNF trigger loc. */
85 * These are based on the vmbus_chanmsg_choffer.chm_chanid.
86 * Save it here for easy access.
88 u_long ch_evtflag_mask;/* event flag */
89 volatile u_long *ch_evtflag; /* event flag loc. */
95 struct hyperv_mon_param *ch_monprm;
96 struct hyperv_dma ch_monprm_dma;
98 uint32_t ch_id; /* channel id */
100 struct vmbus_softc *ch_vmbus;
102 int ch_cpuid; /* owner cpu */
104 * Virtual cpuid for ch_cpuid; it is used to communicate cpuid
105 * related information w/ Hyper-V. If MSR_HV_VP_INDEX does not
106 * exist, ch_vcpuid will always be 0 for compatibility.
111 * If this is a primary channel, ch_subchan* fields
112 * contain sub-channels belonging to this primary
115 struct mtx ch_subchan_lock;
116 TAILQ_HEAD(, vmbus_channel) ch_subchans;
119 /* If this is a sub-channel */
120 TAILQ_ENTRY(vmbus_channel) ch_sublink; /* sub-channel link */
121 struct vmbus_channel *ch_prichan; /* owner primary chan */
123 void *ch_bufring; /* TX+RX bufrings */
124 struct hyperv_dma ch_bufring_dma;
125 uint32_t ch_bufring_gpadl;
127 struct task ch_detach_task;
128 TAILQ_ENTRY(vmbus_channel) ch_prilink; /* primary chan link */
129 uint32_t ch_subidx; /* subchan index */
130 volatile uint32_t ch_stflags; /* atomic-op */
132 struct hyperv_guid ch_guid_type;
133 struct hyperv_guid ch_guid_inst;
135 struct sysctl_ctx_list ch_sysctl_ctx;
136 } __aligned(CACHE_LINE_SIZE);
138 #define VMBUS_CHAN_ISPRIMARY(chan) ((chan)->ch_subidx == 0)
141 * If this flag is set, this channel's interrupt will be masked in ISR,
142 * and the RX bufring will be drained before this channel's interrupt is
145 * This flag is turned on by default. Drivers can turn it off according
146 * to their own requirement.
148 #define VMBUS_CHAN_FLAG_BATCHREAD 0x0002
150 #define VMBUS_CHAN_TXF_HASMNF 0x0001
152 #define VMBUS_CHAN_ST_OPENED_SHIFT 0
153 #define VMBUS_CHAN_ST_OPENED (1 << VMBUS_CHAN_ST_OPENED_SHIFT)
156 struct vmbus_message;
158 void vmbus_event_proc(struct vmbus_softc *, int);
159 void vmbus_event_proc_compat(struct vmbus_softc *, int);
160 void vmbus_chan_msgproc(struct vmbus_softc *, const struct vmbus_message *);
161 void vmbus_chan_destroy_all(struct vmbus_softc *);
163 #endif /* !_VMBUS_CHANVAR_H_ */