drivers: hv: dxgkrnl: Added support for compute only adapters

Signed-off-by: Iouri Tarassov <iourit@linux.microsoft.com>
[kms: forward port to 6.6 from 6.1. No code changes made.]
Signed-off-by: Kelsey Steele <kelseysteele@microsoft.com>

Author: Iouri Tarassov

drivers/hv/dxgkrnl/dxgkrnl.h

@@ -478,6 +478,7 @@ struct dxgadapter {
 	struct winluid		luid;	/* VM bus channel luid */
 	u16			device_description[80];
 	u16			device_instance_id[WIN_MAX_PATH];
+	bool			compute_only;
 	bool			stopping_adapter;
 };
 

drivers/hv/dxgkrnl/dxgmodule.c

@@ -20,6 +20,7 @@
 
 #define PCI_VENDOR_ID_MICROSOFT		0x1414
 #define PCI_DEVICE_ID_VIRTUAL_RENDER	0x008E
+#define PCI_DEVICE_ID_COMPUTE_ACCELERATOR	0x008A
 
 #undef pr_fmt
 #define pr_fmt(fmt)	"dxgk: " fmt
@@ -270,6 +271,8 @@ int dxgglobal_create_adapter(struct pci_dev *dev, guid_t *guid,
 
 	adapter->adapter_state = DXGADAPTER_STATE_WAITING_VMBUS;
 	adapter->host_vgpu_luid = host_vgpu_luid;
+	if (dev->device == PCI_DEVICE_ID_COMPUTE_ACCELERATOR)
+		adapter->compute_only = true;
 	kref_init(&adapter->adapter_kref);
 	init_rwsem(&adapter->core_lock);
 	mutex_init(&adapter->device_creation_lock);
@@ -622,6 +625,12 @@ static struct pci_device_id dxg_pci_id_table[] = {
 		.subvendor = PCI_ANY_ID,
 		.subdevice = PCI_ANY_ID
 	},
+	{
+		.vendor = PCI_VENDOR_ID_MICROSOFT,
+		.device = PCI_DEVICE_ID_COMPUTE_ACCELERATOR,
+		.subvendor = PCI_ANY_ID,
+		.subdevice = PCI_ANY_ID
+	},
 	{ 0 }
 };
 
@@ -962,4 +971,4 @@ module_exit(dxg_drv_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Microsoft Dxgkrnl virtual compute device Driver");
-MODULE_VERSION("2.0.1");
+MODULE_VERSION("2.0.2");

drivers/hv/dxgkrnl/dxgvmbus.c

@@ -3774,6 +3774,7 @@ int dxgvmb_send_query_adapter_info(struct dxgprocess *process,
 			adapter_type->indirect_display_device = 0;
 			adapter_type->acg_supported = 0;
 			adapter_type->support_set_timings_from_vidpn = 0;
+			adapter_type->compute_only = !!adapter->compute_only;
 			break;
 		}
 	default:

drivers/hv/dxgkrnl/ioctl.c

@@ -254,6 +254,8 @@ dxgkp_enum_adapters(struct dxgprocess *process,
 
 	list_for_each_entry(entry, &dxgglobal->adapter_list_head,
 			    adapter_list_entry) {
+		if (entry->compute_only && !filter.include_compute_only)
+			continue;
 		if (dxgadapter_acquire_lock_shared(entry) == 0) {
 			struct d3dkmt_adapterinfo *inf = &info[adapter_count];
 
@@ -474,6 +476,8 @@ dxgkio_enum_adapters(struct dxgprocess *process, void *__user inargs)
 
 	list_for_each_entry(entry, &dxgglobal->adapter_list_head,
 			    adapter_list_entry) {
+		if (entry->compute_only)
+			continue;
 		if (dxgadapter_acquire_lock_shared(entry) == 0) {
 			struct d3dkmt_adapterinfo *inf = &info[adapter_count];