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sys/dev/hyperv/vmbus/hv_connection.c
| Show First 20 Lines • Show All 299 Lines • ▼ Show 20 Lines | hv_vmbus_on_events(int cpu) | ||||
| int rel_id; | int rel_id; | ||||
| int maxdword; | int maxdword; | ||||
| hv_vmbus_synic_event_flags *event; | hv_vmbus_synic_event_flags *event; | ||||
| /* int maxdword = PAGE_SIZE >> 3; */ | /* int maxdword = PAGE_SIZE >> 3; */ | ||||
| KASSERT(cpu <= mp_maxid, ("VMBUS: hv_vmbus_on_events: " | KASSERT(cpu <= mp_maxid, ("VMBUS: hv_vmbus_on_events: " | ||||
| "cpu out of range!")); | "cpu out of range!")); | ||||
| page_addr = hv_vmbus_g_context.syn_ic_event_page[cpu]; | |||||
| event = (hv_vmbus_synic_event_flags *) | |||||
| page_addr + HV_VMBUS_MESSAGE_SINT; | |||||
| if ((hv_vmbus_protocal_version == HV_VMBUS_VERSION_WS2008) || | if ((hv_vmbus_protocal_version == HV_VMBUS_VERSION_WS2008) || | ||||
| (hv_vmbus_protocal_version == HV_VMBUS_VERSION_WIN7)) { | (hv_vmbus_protocal_version == HV_VMBUS_VERSION_WIN7)) { | ||||
| maxdword = HV_MAX_NUM_CHANNELS_SUPPORTED >> 5; | maxdword = HV_MAX_NUM_CHANNELS_SUPPORTED >> 5; | ||||
| /* | /* | ||||
| * receive size is 1/2 page and divide that by 4 bytes | * receive size is 1/2 page and divide that by 4 bytes | ||||
| */ | */ | ||||
| if (synch_test_and_clear_bit(0, &event->flags32[0])) | |||||
| recv_interrupt_page = | recv_interrupt_page = | ||||
| hv_vmbus_g_connection.recv_interrupt_page; | hv_vmbus_g_connection.recv_interrupt_page; | ||||
| } else { | } else { | ||||
| /* | /* | ||||
| * On Host with Win8 or above, the event page can be | * On Host with Win8 or above, the event page can be | ||||
| * checked directly to get the id of the channel | * checked directly to get the id of the channel | ||||
| * that has the pending interrupt. | * that has the pending interrupt. | ||||
| */ | */ | ||||
| maxdword = HV_EVENT_FLAGS_DWORD_COUNT; | maxdword = HV_EVENT_FLAGS_DWORD_COUNT; | ||||
| page_addr = hv_vmbus_g_context.syn_ic_event_page[cpu]; | |||||
| event = (hv_vmbus_synic_event_flags *) | |||||
| page_addr + HV_VMBUS_MESSAGE_SINT; | |||||
| recv_interrupt_page = event->flags32; | recv_interrupt_page = event->flags32; | ||||
| } | } | ||||
| /* | /* | ||||
| * Check events | * Check events | ||||
| */ | */ | ||||
| if (recv_interrupt_page != NULL) { | if (recv_interrupt_page != NULL) { | ||||
| for (dword = 0; dword < maxdword; dword++) { | for (dword = 0; dword < maxdword; dword++) { | ||||
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