2 * Copyright (c) 2016 Microsoft Corp.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice unmodified, this list of conditions, and the following
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24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <sys/param.h>
36 * VMBUS version is 32 bit, upper 16 bit for major_number and lower
37 * 16 bit for minor_number.
39 * 0.13 -- Windows Server 2008
44 #define VMBUS_VERSION_WS2008 ((0 << 16) | (13))
45 #define VMBUS_VERSION_WIN7 ((1 << 16) | (1))
46 #define VMBUS_VERSION_WIN8 ((2 << 16) | (4))
47 #define VMBUS_VERSION_WIN8_1 ((3 << 16) | (0))
49 #define VMBUS_VERSION_MAJOR(ver) (((uint32_t)(ver)) >> 16)
50 #define VMBUS_VERSION_MINOR(ver) (((uint32_t)(ver)) & 0xffff)
52 #define VMBUS_CHAN_POLLHZ_MIN 100 /* 10ms interval */
53 #define VMBUS_CHAN_POLLHZ_MAX 1000000 /* 1us interval */
58 struct vmbus_gpa_range {
64 /* This is actually vmbus_gpa_range.gpa_page[1] */
71 #define VMBUS_CHANPKT_SIZE_SHIFT 3
73 #define VMBUS_CHANPKT_GETLEN(pktlen) \
74 (((int)(pktlen)) << VMBUS_CHANPKT_SIZE_SHIFT)
76 struct vmbus_chanpkt_hdr {
77 uint16_t cph_type; /* VMBUS_CHANPKT_TYPE_ */
78 uint16_t cph_hlen; /* header len, in 8 bytes */
79 uint16_t cph_tlen; /* total len, in 8 bytes */
80 uint16_t cph_flags; /* VMBUS_CHANPKT_FLAG_ */
84 #define VMBUS_CHANPKT_TYPE_INBAND 0x0006
85 #define VMBUS_CHANPKT_TYPE_RXBUF 0x0007
86 #define VMBUS_CHANPKT_TYPE_GPA 0x0009
87 #define VMBUS_CHANPKT_TYPE_COMP 0x000b
89 #define VMBUS_CHANPKT_FLAG_NONE 0
90 #define VMBUS_CHANPKT_FLAG_RC 0x0001 /* report completion */
92 #define VMBUS_CHANPKT_CONST_DATA(pkt) \
93 (const void *)((const uint8_t *)(pkt) + \
94 VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen))
97 #define VMBUS_CHANPKT_DATALEN(pkt) \
98 (VMBUS_CHANPKT_GETLEN((pkt)->cph_tlen) -\
99 VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen))
101 struct vmbus_rxbuf_desc {
106 struct vmbus_chanpkt_rxbuf {
107 struct vmbus_chanpkt_hdr cp_hdr;
108 uint16_t cp_rxbuf_id;
110 uint32_t cp_rxbuf_cnt;
111 struct vmbus_rxbuf_desc cp_rxbuf[];
114 struct vmbus_chan_br {
116 bus_addr_t cbr_paddr;
121 struct vmbus_channel;
123 struct vmbus_xact_ctx;
128 typedef void (*vmbus_chan_callback_t)(struct vmbus_channel *, void *);
130 static __inline struct vmbus_channel *
131 vmbus_get_channel(device_t dev)
133 return device_get_ivars(dev);
137 * vmbus_chan_open_br()
141 * EISCONN Failed, and the memory passed through 'br' is still
142 * connected. Callers must _not_ free the the memory
143 * passed through 'br', if this error happens.
144 * other values Failed. The memory passed through 'br' is no longer
145 * connected. Callers are free to do anything with the
146 * memory passed through 'br'.
150 * vmbus_chan_close_direct()
153 * Callers of this function _must_ make sure to close all sub-channels before
154 * closing the primary channel.
158 * EISCONN Failed, and the memory associated with the bufring
159 * is still connected. Callers must _not_ free the the
160 * memory associated with the bufring, if this error
162 * other values Failed. The memory associated with the bufring is
163 * no longer connected. Callers are free to do anything
164 * with the memory associated with the bufring.
166 int vmbus_chan_open(struct vmbus_channel *chan,
167 int txbr_size, int rxbr_size, const void *udata, int udlen,
168 vmbus_chan_callback_t cb, void *cbarg);
169 int vmbus_chan_open_br(struct vmbus_channel *chan,
170 const struct vmbus_chan_br *cbr, const void *udata,
171 int udlen, vmbus_chan_callback_t cb, void *cbarg);
172 void vmbus_chan_close(struct vmbus_channel *chan);
173 int vmbus_chan_close_direct(struct vmbus_channel *chan);
174 void vmbus_chan_intr_drain(struct vmbus_channel *chan);
175 void vmbus_chan_run_task(struct vmbus_channel *chan,
177 void vmbus_chan_set_orphan(struct vmbus_channel *chan,
178 struct vmbus_xact_ctx *);
179 void vmbus_chan_unset_orphan(struct vmbus_channel *chan);
180 const void *vmbus_chan_xact_wait(const struct vmbus_channel *chan,
181 struct vmbus_xact *xact, size_t *resp_len, bool can_sleep);
183 int vmbus_chan_gpadl_connect(struct vmbus_channel *chan,
184 bus_addr_t paddr, int size, uint32_t *gpadl);
185 int vmbus_chan_gpadl_disconnect(struct vmbus_channel *chan,
188 void vmbus_chan_cpu_set(struct vmbus_channel *chan, int cpu);
189 void vmbus_chan_cpu_rr(struct vmbus_channel *chan);
190 void vmbus_chan_set_readbatch(struct vmbus_channel *chan, bool on);
192 struct vmbus_channel **
193 vmbus_subchan_get(struct vmbus_channel *pri_chan,
195 void vmbus_subchan_rel(struct vmbus_channel **subchan,
197 void vmbus_subchan_drain(struct vmbus_channel *pri_chan);
199 int vmbus_chan_recv(struct vmbus_channel *chan, void *data, int *dlen,
201 int vmbus_chan_recv_pkt(struct vmbus_channel *chan,
202 struct vmbus_chanpkt_hdr *pkt, int *pktlen);
204 int vmbus_chan_send(struct vmbus_channel *chan, uint16_t type,
205 uint16_t flags, void *data, int dlen, uint64_t xactid);
206 int vmbus_chan_send_sglist(struct vmbus_channel *chan,
207 struct vmbus_gpa sg[], int sglen, void *data, int dlen,
209 int vmbus_chan_send_prplist(struct vmbus_channel *chan,
210 struct vmbus_gpa_range *prp, int prp_cnt, void *data,
211 int dlen, uint64_t xactid);
213 uint32_t vmbus_chan_id(const struct vmbus_channel *chan);
214 uint32_t vmbus_chan_subidx(const struct vmbus_channel *chan);
215 bool vmbus_chan_is_primary(const struct vmbus_channel *chan);
216 bool vmbus_chan_is_revoked(const struct vmbus_channel *chan);
217 const struct hyperv_guid *
218 vmbus_chan_guid_inst(const struct vmbus_channel *chan);
219 int vmbus_chan_prplist_nelem(int br_size, int prpcnt_max,
221 bool vmbus_chan_rx_empty(const struct vmbus_channel *chan);
222 bool vmbus_chan_tx_empty(const struct vmbus_channel *chan);
224 vmbus_chan_mgmt_tq(const struct vmbus_channel *chan);
226 void vmbus_chan_poll_enable(struct vmbus_channel *chan,
228 void vmbus_chan_poll_disable(struct vmbus_channel *chan);
230 #endif /* !_VMBUS_H_ */