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

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MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6831
This commit is contained in:
Sepherosa Ziehau 2016-07-11 06:11:24 +00:00
parent 56858424bb
commit c1cc5bdfe8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=302543
4 changed files with 30 additions and 32 deletions
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30
sys/dev/hyperv/vmbus/hv_channel_mgmt.c
View File

@ -674,36 +674,6 @@ vmbus_channel_on_version_response(struct vmbus_softc *sc,
vmbus_msghc_wakeup(sc, msg);
}
/**
* @brief Send a request to get all our pending offers.
*/
int
hv_vmbus_request_channel_offers(void)
{
int ret;
hv_vmbus_channel_msg_header* msg;
hv_vmbus_channel_msg_info* msg_info;
msg_info = (hv_vmbus_channel_msg_info *)
malloc(sizeof(hv_vmbus_channel_msg_info)
+ sizeof(hv_vmbus_channel_msg_header), M_DEVBUF, M_NOWAIT);
if (msg_info == NULL) {
if(bootverbose)
printf("Error VMBUS: malloc failed for Request Offers\n");
return (ENOMEM);
}
msg = (hv_vmbus_channel_msg_header*) msg_info->msg;
msg->message_type = HV_CHANNEL_MESSAGE_REQUEST_OFFERS;
ret = hv_vmbus_post_message(msg, sizeof(hv_vmbus_channel_msg_header));
free(msg_info, M_DEVBUF);
return (ret);
}
/**
* @brief Release channels that are unattached/unconnected (i.e., no drivers associated)
*/

1
sys/dev/hyperv/vmbus/hv_vmbus_priv.h
View File

@ -397,7 +397,6 @@ uint32_t hv_ring_buffer_read_end(
hv_vmbus_channel* hv_vmbus_allocate_channel(void);
void hv_vmbus_free_vmbus_channel(hv_vmbus_channel *channel);
int hv_vmbus_request_channel_offers(void);
void hv_vmbus_release_unattached_channels(void);
uint16_t hv_vmbus_post_msg_via_msg_ipc(

25
sys/dev/hyperv/vmbus/vmbus.c
View File

@ -98,6 +98,7 @@ struct vmbus_msghc_ctx {
static int vmbus_init(struct vmbus_softc *);
static int vmbus_init_contact(struct vmbus_softc *,
uint32_t);
static int vmbus_req_channels(struct vmbus_softc *sc);
static struct vmbus_msghc_ctx *vmbus_msghc_ctx_create(bus_dma_tag_t);
static void vmbus_msghc_ctx_destroy(
@ -417,6 +418,26 @@ vmbus_init(struct vmbus_softc *sc)
return ENXIO;
}
static int
vmbus_req_channels(struct vmbus_softc *sc)
{
struct vmbus_chanmsg_channel_req *req;
struct vmbus_msghc *mh;
int error;
mh = vmbus_msghc_get(sc, sizeof(*req));
if (mh == NULL)
return ENXIO;
req = vmbus_msghc_dataptr(mh);
req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHANNEL_REQ;
error = vmbus_msghc_exec_noresult(mh);
vmbus_msghc_put(sc, mh);
return error;
}
static void
vmbus_msg_task(void *xsc, int pending __unused)
{
@ -1012,7 +1033,9 @@ vmbus_bus_init(void)
else
sc->vmbus_event_proc = vmbus_event_proc;
hv_vmbus_request_channel_offers();
ret = vmbus_req_channels(sc);
if (ret != 0)
goto cleanup;
vmbus_scan();
bus_generic_attach(sc->vmbus_dev);

6
sys/dev/hyperv/vmbus/vmbus_reg.h
View File

@ -83,6 +83,7 @@ CTASSERT(sizeof(struct vmbus_evtflags) == VMBUS_EVTFLAGS_SIZE);
* - Embedded in hypercall_postmsg_in.hc_data, e.g. request.
*/
#define VMBUS_CHANMSG_TYPE_CHANNEL_REQ 3 /* REQ */
#define VMBUS_CHANMSG_TYPE_INIT_CONTACT 14 /* REQ */
#define VMBUS_CHANMSG_TYPE_VERSION_RESP 15 /* RESP */
@ -107,4 +108,9 @@ struct vmbus_chanmsg_version_resp {
uint8_t chm_supp;
} __packed;
/* VMBUS_CHANMSG_TYPE_CHANNEL_REQ */
struct vmbus_chanmsg_channel_req {
struct vmbus_chanmsg_hdr chm_hdr;
} __packed;
#endif /* !_VMBUS_REG_H_ */