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hyperv/vmbus: Use post message Hypercall APIs for channel close

Browse source 
MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6906
This commit is contained in:
Sepherosa Ziehau 2016-07-12 03:25:36 +00:00
parent 2bf62f9a89
commit e9bd7c4417
2 changed files with 34 additions and 17 deletions
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44
sys/dev/hyperv/vmbus/hv_channel.c
View file

@ -487,10 +487,11 @@ cleanup:
static void
hv_vmbus_channel_close_internal(hv_vmbus_channel *channel)
{
int ret = 0;
struct vmbus_softc *sc = channel->vmbus_sc;
struct vmbus_msghc *mh;
struct vmbus_chanmsg_chclose *req;
struct taskqueue *rxq = channel->rxq;
hv_vmbus_channel_close_channel* msg;
hv_vmbus_channel_msg_info* info;
int error;
channel->state = HV_CHANNEL_OPEN_STATE;
@ -504,20 +505,31 @@ hv_vmbus_channel_close_internal(hv_vmbus_channel *channel)
/**
* Send a closing message
*/
info = (hv_vmbus_channel_msg_info *)
malloc( sizeof(hv_vmbus_channel_msg_info) +
sizeof(hv_vmbus_channel_close_channel),
M_DEVBUF, M_NOWAIT);
KASSERT(info != NULL, ("VMBUS: malloc failed hv_vmbus_channel_close!"));
if(info == NULL)
return;
msg = (hv_vmbus_channel_close_channel*) info->msg;
msg->header.message_type = HV_CHANNEL_MESSAGE_CLOSE_CHANNEL;
msg->child_rel_id = channel->offer_msg.child_rel_id;
mh = vmbus_msghc_get(sc, sizeof(*req));
if (mh == NULL) {
device_printf(sc->vmbus_dev,
"can not get msg hypercall for chclose(chan%u)\n",
channel->offer_msg.child_rel_id);
return;
}
ret = hv_vmbus_post_message(
msg, sizeof(hv_vmbus_channel_close_channel));
req = vmbus_msghc_dataptr(mh);
req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHCLOSE;
req->chm_chanid = channel->offer_msg.child_rel_id;
error = vmbus_msghc_exec_noresult(mh);
vmbus_msghc_put(sc, mh);
if (error) {
device_printf(sc->vmbus_dev,
"chclose(chan%u) msg hypercall exec failed: %d\n",
channel->offer_msg.child_rel_id, error);
return;
} else if (bootverbose) {
device_printf(sc->vmbus_dev, "close chan%u\n",
channel->offer_msg.child_rel_id);
}
/* Tear down the gpadl for the channel's ring buffer */
if (channel->ring_buffer_gpadl_handle) {
@ -533,8 +545,6 @@ hv_vmbus_channel_close_internal(hv_vmbus_channel *channel)
contigfree(channel->ring_buffer_pages, channel->ring_buffer_size,
M_DEVBUF);
free(info, M_DEVBUF);
}
/**

7
sys/dev/hyperv/vmbus/vmbus_reg.h
View file

@ -96,6 +96,7 @@ struct vmbus_gpa_range {
#define VMBUS_CHANMSG_TYPE_CHANNEL_REQ 3 /* REQ */
#define VMBUS_CHANMSG_TYPE_CHOPEN 5 /* REQ */
#define VMBUS_CHANMSG_TYPE_CHOPEN_RESP 6 /* RESP */
#define VMBUS_CHANMSG_TYPE_CHCLOSE 7 /* REQ */
#define VMBUS_CHANMSG_TYPE_GPADL_CONN 8 /* REQ */
#define VMBUS_CHANMSG_TYPE_GPADL_SUBCONN 9 /* REQ */
#define VMBUS_CHANMSG_TYPE_GPADP_CONNRESP 10 /* RESP */
@ -190,4 +191,10 @@ struct vmbus_chanmsg_gpadl_connresp {
uint32_t chm_status;
} __packed;
/* VMBUS_CHANMSG_TYPE_CHCLOSE */
struct vmbus_chanmsg_chclose {
struct vmbus_chanmsg_hdr chm_hdr;
uint32_t chm_chanid;
} __packed;
#endif /* !_VMBUS_REG_H_ */