[PATCH v3 11/30] drivers: hv: dxgkrnl: Operations using sync objects

Iouri Tarassov
2022-03-01T19:47:01Z

Implement ioctls to submit operations with compute device
sync objects:
- the LX_DXSIGNALSYNCHRONIZATIONOBJECT ioctl.
The ioctl is used to submit a signal to a sync object.
- the LX_DXWAITFORSYNCHRONIZATIONOBJECT ioctl.
The ioctl is used to submit a wait for a sync object
- the LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMCPU ioctl
The ioctl is used to signal to a monitored fence sync object
from a CPU thread.
- the LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMGPU ioctl.
The ioctl is used to submit a signal to a monitored fence
sync object..
- the LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMGPU2 ioctl.
The ioctl is used to submit a signal to a monitored fence
sync object.
- the LX_DXWAITFORSYNCHRONIZATIONOBJECTFROMGPU ioctl.
The ioctl is used to submit a wait for a monitored fence
sync object.

Compute device synchronization objects are used to synchronize
execution of DMA buffers between different execution contexts.
Operations with sync objects include "signal" and "wait". A wait
for a sync object is satisfied when the sync object is signaled.

A signal operation could be submitted to a compute device context or
the sync object could be signaled by a CPU thread.

To improve performance, submitting operations to the host is done
asynchronously when the host supports it.

Signed-off-by: Iouri Tarassov <iourit@linux.microsoft.com>
---
drivers/hv/dxgkrnl/dxgadapter.c | 21 +
drivers/hv/dxgkrnl/dxgkrnl.h | 62 +++
drivers/hv/dxgkrnl/dxgmodule.c | 97 +++++
drivers/hv/dxgkrnl/dxgvmbus.c | 213 ++++++++++
drivers/hv/dxgkrnl/dxgvmbus.h | 48 +++
drivers/hv/dxgkrnl/ioctl.c | 693 ++++++++++++++++++++++++++++++++
drivers/hv/dxgkrnl/misc.h | 1 +
include/uapi/misc/d3dkmthk.h | 159 ++++++++
8 files changed, 1294 insertions(+)

diff --git a/drivers/hv/dxgkrnl/dxgadapter.c b/drivers/hv/dxgkrnl/dxgadapter.c
index 71e3e1ce5c2b..c001f58a30db 100644
--- a/drivers/hv/dxgkrnl/dxgadapter.c
+++ b/drivers/hv/dxgkrnl/dxgadapter.c
@@ -897,6 +897,12 @@ struct dxgsyncobject *dxgsyncobject_create(struct dxgprocess *process,
case _D3DDDI_PERIODIC_MONITORED_FENCE:
syncobj->monitored_fence = 1;
break;
+ case _D3DDDI_CPU_NOTIFICATION:
+ syncobj->cpu_event = 1;
+ syncobj->host_event = vzalloc(sizeof(struct dxghostevent));
+ if (syncobj->host_event == NULL)
+ goto cleanup;
+ break;
default:
break;
}
@@ -924,6 +930,8 @@ struct dxgsyncobject *dxgsyncobject_create(struct dxgprocess *process,
pr_debug("%s 0x%p\n", __func__, syncobj);
return syncobj;
cleanup:
+ if (syncobj->host_event)
+ vfree(syncobj->host_event);
if (syncobj)
vfree(syncobj);
return NULL;
@@ -933,6 +941,7 @@ void dxgsyncobject_destroy(struct dxgprocess *process,
struct dxgsyncobject *syncobj)
{
int destroyed;
+ struct dxghosteventcpu *host_event;

pr_debug("%s 0x%p", __func__, syncobj);

@@ -951,6 +960,16 @@ void dxgsyncobject_destroy(struct dxgprocess *process,
}
hmgrtable_unlock(&process->handle_table, DXGLOCK_EXCL);

+ if (syncobj->cpu_event) {
+ host_event = syncobj->host_event;
+ if (host_event->cpu_event) {
+ eventfd_ctx_put(host_event->cpu_event);
+ if (host_event->hdr.event_id)
+ dxgglobal_remove_host_event(
+ &host_event->hdr);
+ host_event->cpu_event = NULL;
+ }
+ }
if (syncobj->monitored_fence)
dxgdevice_remove_syncobj(syncobj);
else
@@ -990,5 +1009,7 @@ void dxgsyncobject_release(struct kref *refcount)
struct dxgsyncobject *syncobj;

syncobj = container_of(refcount, struct dxgsyncobject, syncobj_kref);
+ if (syncobj->host_event)
+ vfree(syncobj->host_event);
vfree(syncobj);
}
diff --git a/drivers/hv/dxgkrnl/dxgkrnl.h b/drivers/hv/dxgkrnl/dxgkrnl.h
index f0b0e1bdd897..cb9096bd7a12 100644
--- a/drivers/hv/dxgkrnl/dxgkrnl.h
+++ b/drivers/hv/dxgkrnl/dxgkrnl.h
@@ -86,6 +86,29 @@ int dxgvmbuschannel_init(struct dxgvmbuschannel *ch, struct hv_device *hdev);
void dxgvmbuschannel_destroy(struct dxgvmbuschannel *ch);
void dxgvmbuschannel_receive(void *ctx);

+/*
+ * The structure describes an event, which will be signaled by
+ * a message from host.
+ */
+enum dxghosteventtype {
+ dxghostevent_cpu_event = 1,
+};
+
+struct dxghostevent {
+ struct list_head host_event_list_entry;
+ u64 event_id;
+ enum dxghosteventtype event_type;
+};
+
+struct dxghosteventcpu {
+ struct dxghostevent hdr;
+ struct dxgprocess *process;
+ struct eventfd_ctx *cpu_event;
+ struct completion *completion_event;
+ bool destroy_after_signal;
+ bool remove_from_list;
+};
+
/*
* This is GPU synchronization object, which is used to synchronize execution
* between GPU contextx/hardware queues or for tracking GPU execution progress.
@@ -115,6 +138,8 @@ struct dxgsyncobject {
*/
struct dxgdevice *device;
struct dxgprocess *process;
+ /* Used by D3DDDI_CPU_NOTIFICATION objects */
+ struct dxghosteventcpu *host_event;
/* CPU virtual address of the fence value for "device" syncobjects */
void *mapped_address;
/* Handle in the process handle table */
@@ -129,6 +154,7 @@ struct dxgsyncobject {
u32 stopped:1;
/* device syncobject */
u32 monitored_fence:1;
+ u32 cpu_event:1;
u32 shared:1;
u32 reserved:27;
};
@@ -195,6 +221,11 @@ struct dxgglobal {
/* protects the dxgprocess_adapter lists */
struct mutex process_adapter_mutex;

+ /* list of events, waiting to be signaled by the host */
+ struct list_head host_event_list_head;
+ spinlock_t host_event_list_mutex;
+ atomic64_t host_event_id;
+
bool dxg_dev_initialized;
bool vmbus_registered;
bool pci_registered;
@@ -214,6 +245,11 @@ struct vmbus_channel *dxgglobal_get_vmbus(void);
struct dxgvmbuschannel *dxgglobal_get_dxgvmbuschannel(void);
void dxgglobal_acquire_process_adapter_lock(void);
void dxgglobal_release_process_adapter_lock(void);
+void dxgglobal_add_host_event(struct dxghostevent *hostevent);
+void dxgglobal_remove_host_event(struct dxghostevent *hostevent);
+u64 dxgglobal_new_host_event_id(void);
+void dxgglobal_signal_host_event(u64 event_id);
+struct dxghostevent *dxgglobal_get_host_event(u64 event_id);
int dxgglobal_acquire_channel_lock(void);
void dxgglobal_release_channel_lock(void);

@@ -574,6 +610,31 @@ int dxgvmb_send_create_sync_object(struct dxgprocess *pr,
*args, struct dxgsyncobject *so);
int dxgvmb_send_destroy_sync_object(struct dxgprocess *pr,
struct d3dkmthandle h);
+int dxgvmb_send_signal_sync_object(struct dxgprocess *process,
+ struct dxgadapter *adapter,
+ struct d3dddicb_signalflags flags,
+ u64 legacy_fence_value,
+ struct d3dkmthandle context,
+ u32 object_count,
+ struct d3dkmthandle *object,
+ u32 context_count,
+ struct d3dkmthandle *contexts,
+ u32 fence_count, u64 *fences,
+ struct eventfd_ctx *cpu_event,
+ struct d3dkmthandle device);
+int dxgvmb_send_wait_sync_object_gpu(struct dxgprocess *process,
+ struct dxgadapter *adapter,
+ struct d3dkmthandle context,
+ u32 object_count,
+ struct d3dkmthandle *objects,
+ u64 *fences,
+ bool legacy_fence);
+int dxgvmb_send_wait_sync_object_cpu(struct dxgprocess *process,
+ struct dxgadapter *adapter,
+ struct
+ d3dkmt_waitforsynchronizationobjectfromcpu
+ *args,
+ u64 cpu_event);
int dxgvmb_send_query_adapter_info(struct dxgprocess *process,
struct dxgadapter *adapter,
struct d3dkmt_queryadapterinfo *args);
@@ -589,6 +650,7 @@ int dxgvmb_send_async_msg(struct dxgvmbuschannel *channel,
void *command,
u32 cmd_size);

+void signal_host_cpu_event(struct dxghostevent *eventhdr);
int ntstatus2int(struct ntstatus status);

#endif
diff --git a/drivers/hv/dxgkrnl/dxgmodule.c b/drivers/hv/dxgkrnl/dxgmodule.c
index d64504a1cff0..80af0de4aa37 100644
--- a/drivers/hv/dxgkrnl/dxgmodule.c
+++ b/drivers/hv/dxgkrnl/dxgmodule.c
@@ -124,6 +124,98 @@ static struct dxgadapter *find_adapter(struct winluid *luid)
return adapter;
}

+void dxgglobal_add_host_event(struct dxghostevent *event)
+{
+ spin_lock_irq(&dxgglobal->host_event_list_mutex);
+ list_add_tail(&event->host_event_list_entry,
+ &dxgglobal->host_event_list_head);
+ spin_unlock_irq(&dxgglobal->host_event_list_mutex);
+}
+
+void dxgglobal_remove_host_event(struct dxghostevent *event)
+{
+ spin_lock_irq(&dxgglobal->host_event_list_mutex);
+ if (event->host_event_list_entry.next != NULL) {
+ list_del(&event->host_event_list_entry);
+ event->host_event_list_entry.next = NULL;
+ }
+ spin_unlock_irq(&dxgglobal->host_event_list_mutex);
+}
+
+void signal_host_cpu_event(struct dxghostevent *eventhdr)
+{
+ struct dxghosteventcpu *event = (struct dxghosteventcpu *)eventhdr;
+
+ if (event->remove_from_list ||
+ event->destroy_after_signal) {
+ list_del(&eventhdr->host_event_list_entry);
+ eventhdr->host_event_list_entry.next = NULL;
+ }
+ if (event->cpu_event) {
+ pr_debug("signal cpu event\n");
+ eventfd_signal(event->cpu_event, 1);
+ if (event->destroy_after_signal)
+ eventfd_ctx_put(event->cpu_event);
+ } else {
+ pr_debug("signal completion\n");
+ complete(event->completion_event);
+ }
+ if (event->destroy_after_signal) {
+ pr_debug("destroying event %p\n",
+ event);
+ vfree(event);
+ }
+}
+
+void dxgglobal_signal_host_event(u64 event_id)
+{
+ struct dxghostevent *event;
+ unsigned long flags;
+
+ pr_debug("%s %lld\n", __func__, event_id);
+
+ spin_lock_irqsave(&dxgglobal->host_event_list_mutex, flags);
+ list_for_each_entry(event, &dxgglobal->host_event_list_head,
+ host_event_list_entry) {
+ if (event->event_id == event_id) {
+ pr_debug("found event to signal %lld\n",
+ event_id);
+ if (event->event_type == dxghostevent_cpu_event)
+ signal_host_cpu_event(event);
+ else
+ pr_err("Unknown host event type");
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&dxgglobal->host_event_list_mutex, flags);
+ pr_debug("dxgglobal_signal_host_event_end %lld\n",
+ event_id);
+}
+
+struct dxghostevent *dxgglobal_get_host_event(u64 event_id)
+{
+ struct dxghostevent *entry;
+ struct dxghostevent *event = NULL;
+
+ spin_lock_irq(&dxgglobal->host_event_list_mutex);
+ list_for_each_entry(entry, &dxgglobal->host_event_list_head,
+ host_event_list_entry) {
+ if (entry->event_id == event_id) {
+ list_del(&entry->host_event_list_entry);
+ entry->host_event_list_entry.next = NULL;
+ event = entry;
+ break;
+ }
+ }
+ spin_unlock_irq(&dxgglobal->host_event_list_mutex);
+ return event;
+}
+
+u64 dxgglobal_new_host_event_id(void)
+{
+ return atomic64_inc_return(&dxgglobal->host_event_id);
+}
+
void dxgglobal_acquire_process_adapter_lock(void)
{
mutex_lock(&dxgglobal->process_adapter_mutex);
@@ -745,6 +837,11 @@ static int dxgglobal_create(void)

init_rwsem(&dxgglobal->channel_lock);

+ INIT_LIST_HEAD(&dxgglobal->host_event_list_head);
+ spin_lock_init(&dxgglobal->host_event_list_mutex);
+ atomic64_set(&dxgglobal->host_event_id, 1);
+
+ pr_debug("dxgglobal_init end\n");
pr_debug("dxgglobal_init end\n");
return ret;
}
diff --git a/drivers/hv/dxgkrnl/dxgvmbus.c b/drivers/hv/dxgkrnl/dxgvmbus.c
index 067a60319a12..a6979b4ae955 100644
--- a/drivers/hv/dxgkrnl/dxgvmbus.c
+++ b/drivers/hv/dxgkrnl/dxgvmbus.c
@@ -276,6 +276,22 @@ static void command_vm_to_host_init1(struct dxgkvmb_command_vm_to_host *command,
command->channel_type = DXGKVMB_VM_TO_HOST;
}

+static void signal_guest_event(struct dxgkvmb_command_host_to_vm *packet,
+ u32 packet_length)
+{
+ struct dxgkvmb_command_signalguestevent *command = (void *)packet;
+
+ if (packet_length < sizeof(struct dxgkvmb_command_signalguestevent)) {
+ pr_err("invalid packet size");
+ return;
+ }
+ if (command->event == 0) {
+ pr_err("invalid event pointer");
+ return;
+ }
+ dxgglobal_signal_host_event(command->event);
+}
+
static void process_inband_packet(struct dxgvmbuschannel *channel,
struct vmpacket_descriptor *desc)
{
@@ -292,6 +308,7 @@ static void process_inband_packet(struct dxgvmbuschannel *channel,
switch (packet->command_type) {
case DXGK_VMBCOMMAND_SIGNALGUESTEVENT:
case DXGK_VMBCOMMAND_SIGNALGUESTEVENTPASSIVE:
+ signal_guest_event(packet, packet_length);
break;
case DXGK_VMBCOMMAND_SENDWNFNOTIFICATION:
break;
@@ -1691,6 +1708,202 @@ dxgvmb_send_create_sync_object(struct dxgprocess *process,
return ret;
}

+int dxgvmb_send_signal_sync_object(struct dxgprocess *process,
+ struct dxgadapter *adapter,
+ struct d3dddicb_signalflags flags,
+ u64 legacy_fence_value,
+ struct d3dkmthandle context,
+ u32 object_count,
+ struct d3dkmthandle __user *objects,
+ u32 context_count,
+ struct d3dkmthandle __user *contexts,
+ u32 fence_count,
+ u64 __user *fences,
+ struct eventfd_ctx *cpu_event_handle,
+ struct d3dkmthandle device)
+{
+ int ret;
+ struct dxgkvmb_command_signalsyncobject *command;
+ u32 object_size = object_count * sizeof(struct d3dkmthandle);
+ u32 context_size = context_count * sizeof(struct d3dkmthandle);
+ u32 fence_size = fences ? fence_count * sizeof(u64) : 0;
+ u8 *current_pos;
+ u32 cmd_size = sizeof(struct dxgkvmb_command_signalsyncobject) +
+ object_size + context_size + fence_size;
+ struct dxgvmbusmsg msg = {.hdr = NULL};
+
+ if (context.v)
+ cmd_size += sizeof(struct d3dkmthandle);
+
+ ret = init_message(&msg, adapter, process, cmd_size);
+ if (ret)
+ goto cleanup;
+ command = (void *)msg.msg;
+
+ command_vgpu_to_host_init2(&command->hdr,
+ DXGK_VMBCOMMAND_SIGNALSYNCOBJECT,
+ process->host_handle);
+
+ if (flags.enqueue_cpu_event)
+ command->cpu_event_handle = (u64) cpu_event_handle;
+ else
+ command->device = device;
+ command->flags = flags;
+ command->fence_value = legacy_fence_value;
+ command->object_count = object_count;
+ command->context_count = context_count;
+ current_pos = (u8 *) &command[1];
+ ret = copy_from_user(current_pos, objects, object_size);
+ if (ret) {
+ pr_err("Failed to read objects %p %d",
+ objects, object_size);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ current_pos += object_size;
+ if (context.v) {
+ command->context_count++;
+ *(struct d3dkmthandle *) current_pos = context;
+ current_pos += sizeof(struct d3dkmthandle);
+ }
+ if (context_size) {
+ ret = copy_from_user(current_pos, contexts, context_size);
+ if (ret) {
+ pr_err("Failed to read contexts %p %d",
+ contexts, context_size);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ current_pos += context_size;
+ }
+ if (fence_size) {
+ ret = copy_from_user(current_pos, fences, fence_size);
+ if (ret) {
+ pr_err("Failed to read fences %p %d",
+ fences, fence_size);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ }
+
+ if (dxgglobal->async_msg_enabled) {
+ command->hdr.async_msg = 1;
+ ret = dxgvmb_send_async_msg(msg.channel, msg.hdr, msg.size);
+ } else {
+ ret = dxgvmb_send_sync_msg_ntstatus(msg.channel, msg.hdr,
+ msg.size);
+ }
+
+cleanup:
+ free_message(&msg, process);
+ if (ret)
+ pr_debug("err: %s %d", __func__, ret);
+ return ret;
+}
+
+int dxgvmb_send_wait_sync_object_cpu(struct dxgprocess *process,
+ struct dxgadapter *adapter,
+ struct
+ d3dkmt_waitforsynchronizationobjectfromcpu
+ *args,
+ u64 cpu_event)
+{
+ int ret = -EINVAL;
+ struct dxgkvmb_command_waitforsyncobjectfromcpu *command;
+ u32 object_size = args->object_count * sizeof(struct d3dkmthandle);
+ u32 fence_size = args->object_count * sizeof(u64);
+ u8 *current_pos;
+ u32 cmd_size = sizeof(*command) + object_size + fence_size;
+ struct dxgvmbusmsg msg = {.hdr = NULL};
+
+ ret = init_message(&msg, adapter, process, cmd_size);
+ if (ret)
+ goto cleanup;
+ command = (void *)msg.msg;
+
+ command_vgpu_to_host_init2(&command->hdr,
+ DXGK_VMBCOMMAND_WAITFORSYNCOBJECTFROMCPU,
+ process->host_handle);
+ command->device = args->device;
+ command->flags = args->flags;
+ command->object_count = args->object_count;
+ command->guest_event_pointer = (u64) cpu_event;
+ current_pos = (u8 *) &command[1];
+ ret = copy_from_user(current_pos, args->objects, object_size);
+ if (ret) {
+ pr_err("%s failed to copy objects", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ current_pos += object_size;
+ ret = copy_from_user(current_pos, args->fence_values, fence_size);
+ if (ret) {
+ pr_err("%s failed to copy fences", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_sync_msg_ntstatus(msg.channel, msg.hdr, msg.size);
+
+cleanup:
+ free_message(&msg, process);
+ if (ret)
+ pr_debug("err: %s %d", __func__, ret);
+ return ret;
+}
+
+int dxgvmb_send_wait_sync_object_gpu(struct dxgprocess *process,
+ struct dxgadapter *adapter,
+ struct d3dkmthandle context,
+ u32 object_count,
+ struct d3dkmthandle *objects,
+ u64 *fences,
+ bool legacy_fence)
+{
+ int ret;
+ struct dxgkvmb_command_waitforsyncobjectfromgpu *command;
+ u32 fence_size = object_count * sizeof(u64);
+ u32 object_size = object_count * sizeof(struct d3dkmthandle);
+ u8 *current_pos;
+ u32 cmd_size = object_size + fence_size - sizeof(u64) +
+ sizeof(struct dxgkvmb_command_waitforsyncobjectfromgpu);
+ struct dxgvmbusmsg msg = {.hdr = NULL};
+
+ if (object_count == 0 || object_count > D3DDDI_MAX_OBJECT_WAITED_ON) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ ret = init_message(&msg, adapter, process, cmd_size);
+ if (ret)
+ goto cleanup;
+ command = (void *)msg.msg;
+
+ command_vgpu_to_host_init2(&command->hdr,
+ DXGK_VMBCOMMAND_WAITFORSYNCOBJECTFROMGPU,
+ process->host_handle);
+ command->context = context;
+ command->object_count = object_count;
+ command->legacy_fence_object = legacy_fence;
+ current_pos = (u8 *) command->fence_values;
+ memcpy(current_pos, fences, fence_size);
+ current_pos += fence_size;
+ memcpy(current_pos, objects, object_size);
+
+ if (dxgglobal->async_msg_enabled) {
+ command->hdr.async_msg = 1;
+ ret = dxgvmb_send_async_msg(msg.channel, msg.hdr, msg.size);
+ } else {
+ ret = dxgvmb_send_sync_msg_ntstatus(msg.channel, msg.hdr,
+ msg.size);
+ }
+
+cleanup:
+ free_message(&msg, process);
+ if (ret)
+ pr_debug("err: %s %d", __func__, ret);
+ return ret;
+}
+
int dxgvmb_send_query_adapter_info(struct dxgprocess *process,
struct dxgadapter *adapter,
struct d3dkmt_queryadapterinfo *args)
diff --git a/drivers/hv/dxgkrnl/dxgvmbus.h b/drivers/hv/dxgkrnl/dxgvmbus.h
index a2cfdb832664..da63f89ad822 100644
--- a/drivers/hv/dxgkrnl/dxgvmbus.h
+++ b/drivers/hv/dxgkrnl/dxgvmbus.h
@@ -165,6 +165,13 @@ struct dxgkvmb_command_host_to_vm {
enum dxgkvmb_commandtype_host_to_vm command_type;
};

+struct dxgkvmb_command_signalguestevent {
+ struct dxgkvmb_command_host_to_vm hdr;
+ u64 event;
+ u64 process_id;
+ bool dereference_event;
+};
+
/* Returns ntstatus */
struct dxgkvmb_command_setiospaceregion {
struct dxgkvmb_command_vm_to_host hdr;
@@ -430,4 +437,45 @@ struct dxgkvmb_command_destroysyncobject {
struct d3dkmthandle sync_object;
};

+/* The command returns ntstatus */
+struct dxgkvmb_command_signalsyncobject {
+ struct dxgkvmb_command_vgpu_to_host hdr;
+ u32 object_count;
+ struct d3dddicb_signalflags flags;
+ u32 context_count;
+ u64 fence_value;
+ union {
+ /* Pointer to the guest event object */
+ u64 cpu_event_handle;
+ /* Non zero when signal from CPU is done */
+ struct d3dkmthandle device;
+ };
+ /* struct d3dkmthandle ObjectHandleArray[object_count] */
+ /* struct d3dkmthandle ContextArray[context_count] */
+ /* u64 MonitoredFenceValueArray[object_count] */
+};
+
+/* The command returns ntstatus */
+struct dxgkvmb_command_waitforsyncobjectfromcpu {
+ struct dxgkvmb_command_vgpu_to_host hdr;
+ struct d3dkmthandle device;
+ u32 object_count;
+ struct d3dddi_waitforsynchronizationobjectfromcpu_flags flags;
+ u64 guest_event_pointer;
+ bool dereference_event;
+ /* struct d3dkmthandle ObjectHandleArray[object_count] */
+ /* u64 FenceValueArray [object_count] */
+};
+
+/* The command returns ntstatus */
+struct dxgkvmb_command_waitforsyncobjectfromgpu {
+ struct dxgkvmb_command_vgpu_to_host hdr;
+ struct d3dkmthandle context;
+ /* Must be 1 when bLegacyFenceObject is TRUE */
+ u32 object_count;
+ bool legacy_fence_object;
+ u64 fence_values[1];
+ /* struct d3dkmthandle ObjectHandles[object_count] */
+};
+
#endif /* _DXGVMBUS_H */
diff --git a/drivers/hv/dxgkrnl/ioctl.c b/drivers/hv/dxgkrnl/ioctl.c
index bc1ac2dd302f..b945da0da55a 100644
--- a/drivers/hv/dxgkrnl/ioctl.c
+++ b/drivers/hv/dxgkrnl/ioctl.c
@@ -1375,8 +1375,10 @@ dxgk_create_sync_object(struct dxgprocess *process, void *__user inargs)
struct d3dkmt_createsynchronizationobject2 args;
struct dxgdevice *device = NULL;
struct dxgadapter *adapter = NULL;
+ struct eventfd_ctx *event = NULL;
struct dxgsyncobject *syncobj = NULL;
bool device_lock_acquired = false;
+ struct dxghosteventcpu *host_event = NULL;

ret = copy_from_user(&args, inargs, sizeof(args));
if (ret) {
@@ -1411,6 +1413,27 @@ dxgk_create_sync_object(struct dxgprocess *process, void *__user inargs)
goto cleanup;
}

+ if (args.info.type == _D3DDDI_CPU_NOTIFICATION) {
+ event = eventfd_ctx_fdget((int)
+ args.info.cpu_notification.event);
+ if (IS_ERR(event)) {
+ pr_err("failed to reference the event");
+ event = NULL;
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ host_event = syncobj->host_event;
+ host_event->hdr.event_id = dxgglobal_new_host_event_id();
+ host_event->cpu_event = event;
+ host_event->remove_from_list = false;
+ host_event->destroy_after_signal = false;
+ host_event->hdr.event_type = dxghostevent_cpu_event;
+ dxgglobal_add_host_event(&host_event->hdr);
+ args.info.cpu_notification.event = host_event->hdr.event_id;
+ pr_debug("creating CPU notification event: %lld",
+ args.info.cpu_notification.event);
+ }
+
ret = dxgvmb_send_create_sync_object(process, adapter, &args, syncobj);
if (ret < 0)
goto cleanup;
@@ -1438,7 +1461,10 @@ dxgk_create_sync_object(struct dxgprocess *process, void *__user inargs)
if (args.sync_object.v)
dxgvmb_send_destroy_sync_object(process,
args.sync_object);
+ event = NULL;
}
+ if (event)
+ eventfd_ctx_put(event);
}
if (adapter)
dxgadapter_release_lock_shared(adapter);
@@ -1494,6 +1520,659 @@ dxgk_destroy_sync_object(struct dxgprocess *process, void *__user inargs)
return ret;
}

+static int
+dxgk_signal_sync_object(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_signalsynchronizationobject2 args;
+ struct d3dkmt_signalsynchronizationobject2 *__user in_args = inargs;
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ int ret;
+ u32 fence_count = 1;
+ struct eventfd_ctx *event = NULL;
+ struct dxghosteventcpu *host_event = NULL;
+ bool host_event_added = false;
+ u64 host_event_id = 0;
+
+ pr_debug("ioctl: %s", __func__);
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.context_count >= D3DDDI_MAX_BROADCAST_CONTEXT ||
+ args.object_count > D3DDDI_MAX_OBJECT_SIGNALED) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.flags.enqueue_cpu_event) {
+ host_event = vzalloc(sizeof(*host_event));
+ if (host_event == NULL) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+ host_event->process = process;
+ event = eventfd_ctx_fdget((int)args.cpu_event_handle);
+ if (IS_ERR(event)) {
+ pr_err("failed to reference the event");
+ event = NULL;
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ fence_count = 0;
+ host_event->cpu_event = event;
+ host_event_id = dxgglobal_new_host_event_id();
+ host_event->hdr.event_type = dxghostevent_cpu_event;
+ host_event->hdr.event_id = host_event_id;
+ host_event->remove_from_list = true;
+ host_event->destroy_after_signal = true;
+ dxgglobal_add_host_event(&host_event->hdr);
+ host_event_added = true;
+ }
+
+ device = dxgprocess_device_by_object_handle(process,
+ HMGRENTRY_TYPE_DXGCONTEXT,
+ args.context);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_signal_sync_object(process, adapter,
+ args.flags, args.fence.fence_value,
+ args.context, args.object_count,
+ in_args->object_array,
+ args.context_count,
+ in_args->contexts, fence_count,
+ NULL, (void *)host_event_id,
+ zerohandle);
+
+ /*
+ * When the send operation succeeds, the host event will be destroyed
+ * after signal from the host
+ */
+
+cleanup:
+
+ if (ret < 0) {
+ if (host_event_added) {
+ /* The event might be signaled and destroyed by host */
+ host_event = (struct dxghosteventcpu *)
+ dxgglobal_get_host_event(host_event_id);
+ if (host_event) {
+ eventfd_ctx_put(event);
+ event = NULL;
+ vfree(host_event);
+ host_event = NULL;
+ }
+ }
+ if (event)
+ eventfd_ctx_put(event);
+ if (host_event)
+ vfree(host_event);
+ }
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
+static int
+dxgk_signal_sync_object_cpu(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_signalsynchronizationobjectfromcpu args;
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ int ret;
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ if (args.object_count == 0 ||
+ args.object_count > D3DDDI_MAX_OBJECT_SIGNALED) {
+ pr_debug("Too many objects: %d",
+ args.object_count);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ device = dxgprocess_device_by_handle(process, args.device);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_signal_sync_object(process, adapter,
+ args.flags, 0, zerohandle,
+ args.object_count, args.objects, 0,
+ NULL, args.object_count,
+ args.fence_values, NULL,
+ args.device);
+
+cleanup:
+
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
+static int
+dxgk_signal_sync_object_gpu(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_signalsynchronizationobjectfromgpu args;
+ struct d3dkmt_signalsynchronizationobjectfromgpu *__user user_args =
+ inargs;
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ struct d3dddicb_signalflags flags = { };
+ int ret;
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.object_count == 0 ||
+ args.object_count > DXG_MAX_VM_BUS_PACKET_SIZE) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ device = dxgprocess_device_by_object_handle(process,
+ HMGRENTRY_TYPE_DXGCONTEXT,
+ args.context);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_signal_sync_object(process, adapter,
+ flags, 0, zerohandle,
+ args.object_count,
+ args.objects, 1,
+ &user_args->context,
+ args.object_count,
+ args.monitored_fence_values, NULL,
+ zerohandle);
+
+cleanup:
+
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
+static int
+dxgk_signal_sync_object_gpu2(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_signalsynchronizationobjectfromgpu2 args;
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ struct d3dkmthandle context_handle;
+ struct eventfd_ctx *event = NULL;
+ u64 *fences = NULL;
+ u32 fence_count = 0;
+ int ret;
+ struct dxghosteventcpu *host_event = NULL;
+ bool host_event_added = false;
+ u64 host_event_id = 0;
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.flags.enqueue_cpu_event) {
+ if (args.object_count != 0 || args.cpu_event_handle == 0) {
+ pr_err("Bad input for EnqueueCpuEvent: %d %lld",
+ args.object_count, args.cpu_event_handle);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ } else if (args.object_count == 0 ||
+ args.object_count > DXG_MAX_VM_BUS_PACKET_SIZE ||
+ args.context_count == 0 ||
+ args.context_count > DXG_MAX_VM_BUS_PACKET_SIZE) {
+ pr_err("Invalid input: %d %d",
+ args.object_count, args.context_count);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ ret = copy_from_user(&context_handle, args.contexts,
+ sizeof(struct d3dkmthandle));
+ if (ret) {
+ pr_err("%s failed to copy context handle", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.flags.enqueue_cpu_event) {
+ host_event = vzalloc(sizeof(*host_event));
+ if (host_event == NULL) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+ host_event->process = process;
+ event = eventfd_ctx_fdget((int)args.cpu_event_handle);
+ if (IS_ERR(event)) {
+ pr_err("failed to reference the event");
+ event = NULL;
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ fence_count = 0;
+ host_event->cpu_event = event;
+ host_event_id = dxgglobal_new_host_event_id();
+ host_event->hdr.event_id = host_event_id;
+ host_event->hdr.event_type = dxghostevent_cpu_event;
+ host_event->remove_from_list = true;
+ host_event->destroy_after_signal = true;
+ dxgglobal_add_host_event(&host_event->hdr);
+ host_event_added = true;
+ } else {
+ fences = args.monitored_fence_values;
+ fence_count = args.object_count;
+ }
+
+ device = dxgprocess_device_by_object_handle(process,
+ HMGRENTRY_TYPE_DXGCONTEXT,
+ context_handle);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_signal_sync_object(process, adapter,
+ args.flags, 0, zerohandle,
+ args.object_count, args.objects,
+ args.context_count, args.contexts,
+ fence_count, fences,
+ (void *)host_event_id, zerohandle);
+
+cleanup:
+
+ if (ret < 0) {
+ if (host_event_added) {
+ /* The event might be signaled and destroyed by host */
+ host_event = (struct dxghosteventcpu *)
+ dxgglobal_get_host_event(host_event_id);
+ if (host_event) {
+ eventfd_ctx_put(event);
+ event = NULL;
+ vfree(host_event);
+ host_event = NULL;
+ }
+ }
+ if (event)
+ eventfd_ctx_put(event);
+ if (host_event)
+ vfree(host_event);
+ }
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
+static int
+dxgk_wait_sync_object(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_waitforsynchronizationobject2 args;
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ int ret;
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.object_count > D3DDDI_MAX_OBJECT_WAITED_ON ||
+ args.object_count == 0) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ device = dxgprocess_device_by_object_handle(process,
+ HMGRENTRY_TYPE_DXGCONTEXT,
+ args.context);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ pr_debug("Fence value: %lld", args.fence.fence_value);
+ ret = dxgvmb_send_wait_sync_object_gpu(process, adapter,
+ args.context, args.object_count,
+ args.object_array,
+ &args.fence.fence_value, true);
+
+cleanup:
+
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
+static int
+dxgk_wait_sync_object_cpu(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_waitforsynchronizationobjectfromcpu args;
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ struct eventfd_ctx *event = NULL;
+ struct dxghosteventcpu host_event = { };
+ struct dxghosteventcpu *async_host_event = NULL;
+ struct completion local_event = { };
+ u64 event_id = 0;
+ int ret;
+ bool host_event_added = false;
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.object_count > DXG_MAX_VM_BUS_PACKET_SIZE ||
+ args.object_count == 0) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.async_event) {
+ async_host_event = vzalloc(sizeof(*async_host_event));
+ if (async_host_event == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ async_host_event->process = process;
+ event = eventfd_ctx_fdget((int)args.async_event);
+ if (IS_ERR(event)) {
+ pr_err("failed to reference the event");
+ event = NULL;
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ async_host_event->cpu_event = event;
+ async_host_event->hdr.event_id = dxgglobal_new_host_event_id();
+ async_host_event->destroy_after_signal = true;
+ async_host_event->hdr.event_type = dxghostevent_cpu_event;
+ dxgglobal_add_host_event(&async_host_event->hdr);
+ event_id = async_host_event->hdr.event_id;
+ host_event_added = true;
+ } else {
+ init_completion(&local_event);
+ host_event.completion_event = &local_event;
+ host_event.hdr.event_id = dxgglobal_new_host_event_id();
+ host_event.hdr.event_type = dxghostevent_cpu_event;
+ dxgglobal_add_host_event(&host_event.hdr);
+ event_id = host_event.hdr.event_id;
+ }
+
+ device = dxgprocess_device_by_handle(process, args.device);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_wait_sync_object_cpu(process, adapter,
+ &args, event_id);
+ if (ret < 0)
+ goto cleanup;
+
+ if (args.async_event == 0) {
+ dxgadapter_release_lock_shared(adapter);
+ adapter = NULL;
+ ret = wait_for_completion_interruptible(&local_event);
+ if (ret) {
+ pr_err("%s: wait_completion_interruptible failed: %d",
+ __func__, ret);
+ ret = -ERESTARTSYS;
+ }
+ }
+
+cleanup:
+
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+ if (host_event.hdr.event_id)
+ dxgglobal_remove_host_event(&host_event.hdr);
+ if (ret < 0) {
+ if (host_event_added) {
+ async_host_event = (struct dxghosteventcpu *)
+ dxgglobal_get_host_event(event_id);
+ if (async_host_event) {
+ if (async_host_event->hdr.event_type ==
+ dxghostevent_cpu_event) {
+ eventfd_ctx_put(event);
+ event = NULL;
+ vfree(async_host_event);
+ async_host_event = NULL;
+ } else {
+ pr_err("Invalid event type");
+ DXGKRNL_ASSERT(0);
+ }
+ }
+ }
+ if (event)
+ eventfd_ctx_put(event);
+ if (async_host_event)
+ vfree(async_host_event);
+ }
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
+static int
+dxgk_wait_sync_object_gpu(struct dxgprocess *process, void *__user inargs)
+{
+ struct d3dkmt_waitforsynchronizationobjectfromgpu args;
+ struct dxgcontext *context = NULL;
+ struct d3dkmthandle device_handle = {};
+ struct dxgdevice *device = NULL;
+ struct dxgadapter *adapter = NULL;
+ struct dxgsyncobject *syncobj = NULL;
+ struct d3dkmthandle *objects = NULL;
+ u32 object_size;
+ u64 *fences = NULL;
+ int ret;
+ enum hmgrentry_type syncobj_type = HMGRENTRY_TYPE_FREE;
+ bool monitored_fence = false;
+
+ ret = copy_from_user(&args, inargs, sizeof(args));
+ if (ret) {
+ pr_err("%s failed to copy input args", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ if (args.object_count > DXG_MAX_VM_BUS_PACKET_SIZE ||
+ args.object_count == 0) {
+ pr_err("Invalid object count: %d", args.object_count);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ object_size = sizeof(struct d3dkmthandle) * args.object_count;
+ objects = vzalloc(object_size);
+ if (objects == NULL) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+ ret = copy_from_user(objects, args.objects, object_size);
+ if (ret) {
+ pr_err("%s failed to copy objects", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ hmgrtable_lock(&process->handle_table, DXGLOCK_SHARED);
+ context = hmgrtable_get_object_by_type(&process->handle_table,
+ HMGRENTRY_TYPE_DXGCONTEXT,
+ args.context);
+ if (context) {
+ device_handle = context->device_handle;
+ syncobj_type =
+ hmgrtable_get_object_type(&process->handle_table,
+ objects[0]);
+ }
+ if (device_handle.v == 0) {
+ pr_err("Invalid context handle: %x", args.context.v);
+ ret = -EINVAL;
+ } else {
+ if (syncobj_type == HMGRENTRY_TYPE_MONITOREDFENCE) {
+ monitored_fence = true;
+ } else if (syncobj_type == HMGRENTRY_TYPE_DXGSYNCOBJECT) {
+ syncobj =
+ hmgrtable_get_object_by_type(&process->handle_table,
+ HMGRENTRY_TYPE_DXGSYNCOBJECT,
+ objects[0]);
+ if (syncobj == NULL) {
+ pr_err("Invalid syncobj: %x", objects[0].v);
+ ret = -EINVAL;
+ } else {
+ monitored_fence = syncobj->monitored_fence;
+ }
+ } else {
+ pr_err("Invalid syncobj type: %x", objects[0].v);
+ ret = -EINVAL;
+ }
+ }
+ hmgrtable_unlock(&process->handle_table, DXGLOCK_SHARED);
+
+ if (ret < 0)
+ goto cleanup;
+
+ if (monitored_fence) {
+ object_size = sizeof(u64) * args.object_count;
+ fences = vzalloc(object_size);
+ if (fences == NULL) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+ ret = copy_from_user(fences, args.monitored_fence_values,
+ object_size);
+ if (ret) {
+ pr_err("%s failed to copy fences", __func__);
+ ret = -EINVAL;
+ goto cleanup;
+ }
+ } else {
+ fences = &args.fence_value;
+ }
+
+ device = dxgprocess_device_by_handle(process, device_handle);
+ if (device == NULL) {
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ adapter = device->adapter;
+ ret = dxgadapter_acquire_lock_shared(adapter);
+ if (ret < 0) {
+ adapter = NULL;
+ goto cleanup;
+ }
+
+ ret = dxgvmb_send_wait_sync_object_gpu(process, adapter,
+ args.context, args.object_count,
+ objects, fences,
+ !monitored_fence);
+
+cleanup:
+
+ if (adapter)
+ dxgadapter_release_lock_shared(adapter);
+ if (device)
+ kref_put(&device->device_kref, dxgdevice_release);
+ if (objects)
+ vfree(objects);
+ if (fences && fences != &args.fence_value)
+ vfree(fences);
+
+ pr_debug("ioctl:%s %s %d", errorstr(ret), __func__, ret);
+ return ret;
+}
+
/*
* IOCTL processing
* The driver IOCTLs return
@@ -1564,6 +2243,10 @@ void init_ioctls(void)
LX_DXQUERYADAPTERINFO);
SET_IOCTL(/*0x10 */ dxgk_create_sync_object,
LX_DXCREATESYNCHRONIZATIONOBJECT);
+ SET_IOCTL(/*0x11 */ dxgk_signal_sync_object,
+ LX_DXSIGNALSYNCHRONIZATIONOBJECT);
+ SET_IOCTL(/*0x12 */ dxgk_wait_sync_object,
+ LX_DXWAITFORSYNCHRONIZATIONOBJECT);
SET_IOCTL(/*0x13 */ dxgk_destroy_allocation,
LX_DXDESTROYALLOCATION2);
SET_IOCTL(/*0x14 */ dxgk_enum_adapters,
@@ -1574,6 +2257,16 @@ void init_ioctls(void)
LX_DXDESTROYDEVICE);
SET_IOCTL(/*0x1d */ dxgk_destroy_sync_object,
LX_DXDESTROYSYNCHRONIZATIONOBJECT);
+ SET_IOCTL(/*0x31 */ dxgk_signal_sync_object_cpu,
+ LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMCPU);
+ SET_IOCTL(/*0x32 */ dxgk_signal_sync_object_gpu,
+ LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMGPU);
+ SET_IOCTL(/*0x33 */ dxgk_signal_sync_object_gpu2,
+ LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMGPU2);
+ SET_IOCTL(/*0x3a */ dxgk_wait_sync_object_cpu,
+ LX_DXWAITFORSYNCHRONIZATIONOBJECTFROMCPU);
+ SET_IOCTL(/*0x3b */ dxgk_wait_sync_object_gpu,
+ LX_DXWAITFORSYNCHRONIZATIONOBJECTFROMGPU);
SET_IOCTL(/*0x3e */ dxgk_enum_adapters3,
LX_DXENUMADAPTERS3);
}
diff --git a/drivers/hv/dxgkrnl/misc.h b/drivers/hv/dxgkrnl/misc.h
index 41abdc504bc2..f56d21b48814 100644
--- a/drivers/hv/dxgkrnl/misc.h
+++ b/drivers/hv/dxgkrnl/misc.h
@@ -26,6 +26,7 @@ extern const struct d3dkmthandle zerohandle;
* When a lower lock ois held, the higher lock should not be acquired.
*
* device_list_mutex
+ * host_event_list_mutex
* channel_lock
* fd_mutex
* plistmutex
diff --git a/include/uapi/misc/d3dkmthk.h b/include/uapi/misc/d3dkmthk.h
index 52d54aa9266e..13bc3adf0abb 100644
--- a/include/uapi/misc/d3dkmthk.h
+++ b/include/uapi/misc/d3dkmthk.h
@@ -56,6 +56,9 @@ struct winluid {

#define D3DKMT_CREATEALLOCATION_MAX 1024
#define D3DKMT_ADAPTERS_MAX 64
+#define D3DDDI_MAX_BROADCAST_CONTEXT 64
+#define D3DDDI_MAX_OBJECT_WAITED_ON 32
+#define D3DDDI_MAX_OBJECT_SIGNALED 32

struct d3dkmt_adapterinfo {
struct d3dkmthandle adapter_handle;
@@ -339,6 +342,148 @@ struct d3dkmt_createsynchronizationobject2 {
__u32 reserved1;
};

+struct d3dkmt_waitforsynchronizationobject2 {
+ struct d3dkmthandle context;
+ __u32 object_count;
+ struct d3dkmthandle object_array[D3DDDI_MAX_OBJECT_WAITED_ON];
+ union {
+ struct {
+ __u64 fence_value;
+ } fence;
+ __u64 reserved[8];
+ };
+};
+
+struct d3dddicb_signalflags {
+ union {
+ struct {
+ __u32 signal_at_submission:1;
+ __u32 enqueue_cpu_event:1;
+ __u32 allow_fence_rewind:1;
+ __u32 reserved:28;
+ __u32 DXGK_SIGNAL_FLAG_INTERNAL0:1;
+ };
+ __u32 value;
+ };
+};
+
+struct d3dkmt_signalsynchronizationobject2 {
+ struct d3dkmthandle context;
+ __u32 object_count;
+ struct d3dkmthandle object_array[D3DDDI_MAX_OBJECT_SIGNALED];
+ struct d3dddicb_signalflags flags;
+ __u32 context_count;
+ struct d3dkmthandle contexts[D3DDDI_MAX_BROADCAST_CONTEXT];
+ union {
+ struct {
+ __u64 fence_value;
+ } fence;
+ __u64 cpu_event_handle;
+ __u64 reserved[8];
+ };
+};
+
+struct d3dddi_waitforsynchronizationobjectfromcpu_flags {
+ union {
+ struct {
+ __u32 wait_any:1;
+ __u32 reserved:31;
+ };
+ __u32 value;
+ };
+};
+
+struct d3dkmt_waitforsynchronizationobjectfromcpu {
+ struct d3dkmthandle device;
+ __u32 object_count;
+#ifdef __KERNEL__
+ struct d3dkmthandle *objects;
+ __u64 *fence_values;
+#else
+ __u64 objects;
+ __u64 fence_values;
+#endif
+ __u64 async_event;
+ struct d3dddi_waitforsynchronizationobjectfromcpu_flags flags;
+};
+
+struct d3dkmt_signalsynchronizationobjectfromcpu {
+ struct d3dkmthandle device;
+ __u32 object_count;
+#ifdef __KERNEL__
+ struct d3dkmthandle *objects;
+ __u64 *fence_values;
+#else
+ __u64 objects;
+ __u64 fence_values;
+#endif
+ struct d3dddicb_signalflags flags;
+};
+
+struct d3dkmt_waitforsynchronizationobjectfromgpu {
+ struct d3dkmthandle context;
+ __u32 object_count;
+#ifdef __KERNEL__
+ struct d3dkmthandle *objects;
+#else
+ __u64 objects;
+#endif
+ union {
+#ifdef __KERNEL__
+ __u64 *monitored_fence_values;
+#else
+ __u64 monitored_fence_values;
+#endif
+ __u64 fence_value;
+ __u64 reserved[8];
+ };
+};
+
+struct d3dkmt_signalsynchronizationobjectfromgpu {
+ struct d3dkmthandle context;
+ __u32 object_count;
+#ifdef __KERNEL__
+ struct d3dkmthandle *objects;
+#else
+ __u64 objects;
+#endif
+ union {
+#ifdef __KERNEL__
+ __u64 *monitored_fence_values;
+#else
+ __u64 monitored_fence_values;
+#endif
+ __u64 reserved[8];
+ };
+};
+
+struct d3dkmt_signalsynchronizationobjectfromgpu2 {
+ __u32 object_count;
+ __u32 reserved1;
+#ifdef __KERNEL__
+ struct d3dkmthandle *objects;
+#else
+ __u64 objects;
+#endif
+ struct d3dddicb_signalflags flags;
+ __u32 context_count;
+#ifdef __KERNEL__
+ struct d3dkmthandle *contexts;
+#else
+ __u64 contexts;
+#endif
+ union {
+ __u64 fence_value;
+ __u64 cpu_event_handle;
+#ifdef __KERNEL__
+ __u64 *monitored_fence_values;
+#else
+ __u64 monitored_fence_values;
+#endif
+ __u64 reserved[8];
+ };
+};
+
struct d3dkmt_destroysynchronizationobject {
struct d3dkmthandle sync_object;
};
@@ -572,6 +717,10 @@ struct d3dkmt_enumadapters3 {
_IOWR(0x47, 0x09, struct d3dkmt_queryadapterinfo)
#define LX_DXCREATESYNCHRONIZATIONOBJECT \
_IOWR(0x47, 0x10, struct d3dkmt_createsynchronizationobject2)
+#define LX_DXSIGNALSYNCHRONIZATIONOBJECT \
+ _IOWR(0x47, 0x11, struct d3dkmt_signalsynchronizationobject2)
+#define LX_DXWAITFORSYNCHRONIZATIONOBJECT \
+ _IOWR(0x47, 0x12, struct d3dkmt_waitforsynchronizationobject2)
#define LX_DXDESTROYALLOCATION2 \
_IOWR(0x47, 0x13, struct d3dkmt_destroyallocation2)
#define LX_DXENUMADAPTERS2 \
@@ -582,6 +731,16 @@ struct d3dkmt_enumadapters3 {
_IOWR(0x47, 0x19, struct d3dkmt_destroydevice)
#define LX_DXDESTROYSYNCHRONIZATIONOBJECT \
_IOWR(0x47, 0x1d, struct d3dkmt_destroysynchronizationobject)
+#define LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMCPU \
+ _IOWR(0x47, 0x31, struct d3dkmt_signalsynchronizationobjectfromcpu)
+#define LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMGPU \
+ _IOWR(0x47, 0x32, struct d3dkmt_signalsynchronizationobjectfromgpu)
+#define LX_DXSIGNALSYNCHRONIZATIONOBJECTFROMGPU2 \
+ _IOWR(0x47, 0x33, struct d3dkmt_signalsynchronizationobjectfromgpu2)
+#define LX_DXWAITFORSYNCHRONIZATIONOBJECTFROMCPU \
+ _IOWR(0x47, 0x3a, struct d3dkmt_waitforsynchronizationobjectfromcpu)
+#define LX_DXWAITFORSYNCHRONIZATIONOBJECTFROMGPU \
+ _IOWR(0x47, 0x3b, struct d3dkmt_waitforsynchronizationobjectfromgpu)
#define LX_DXENUMADAPTERS3 \
_IOWR(0x47, 0x3e, struct d3dkmt_enumadapters3)

--
2.35.1