drm/i915/gvt: remove intel_gvt_ops

Remove these pointless indirect alls by just calling the only instance
of each method directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-8-hch@lst.deReviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>

drivers/gpu/drm/i915/gvt/gvt.c

@@ -39,23 +39,6 @@
 #include <linux/vfio.h>
 #include <linux/mdev.h>
 
-static const struct intel_gvt_ops intel_gvt_ops = {
-	.emulate_cfg_read = intel_vgpu_emulate_cfg_read,
-	.emulate_cfg_write = intel_vgpu_emulate_cfg_write,
-	.emulate_mmio_read = intel_vgpu_emulate_mmio_read,
-	.emulate_mmio_write = intel_vgpu_emulate_mmio_write,
-	.vgpu_create = intel_gvt_create_vgpu,
-	.vgpu_destroy = intel_gvt_destroy_vgpu,
-	.vgpu_release = intel_gvt_release_vgpu,
-	.vgpu_reset = intel_gvt_reset_vgpu,
-	.vgpu_activate = intel_gvt_activate_vgpu,
-	.vgpu_deactivate = intel_gvt_deactivate_vgpu,
-	.vgpu_query_plane = intel_vgpu_query_plane,
-	.vgpu_get_dmabuf = intel_vgpu_get_dmabuf,
-	.write_protect_handler = intel_vgpu_page_track_handler,
-	.emulate_hotplug = intel_vgpu_emulate_hotplug,
-};
-
 static void init_device_info(struct intel_gvt *gvt)
 {
 	struct intel_gvt_device_info *info = &gvt->device_info;
@@ -252,8 +235,7 @@ static int intel_gvt_init_device(struct drm_i915_private *i915)
 
 	intel_gvt_debugfs_init(gvt);
 
-	ret = intel_gvt_hypervisor_host_init(i915->drm.dev, gvt,
-					     &intel_gvt_ops);
+	ret = intel_gvt_hypervisor_host_init(i915->drm.dev, gvt);
 	if (ret)
 		goto out_destroy_idle_vgpu;
 

drivers/gpu/drm/i915/gvt/gvt.h

@@ -556,30 +556,6 @@ void populate_pvinfo_page(struct intel_vgpu *vgpu);
 int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload);
 void enter_failsafe_mode(struct intel_vgpu *vgpu, int reason);
 
-struct intel_gvt_ops {
-	int (*emulate_cfg_read)(struct intel_vgpu *, unsigned int, void *,
-				unsigned int);
-	int (*emulate_cfg_write)(struct intel_vgpu *, unsigned int, void *,
-				unsigned int);
-	int (*emulate_mmio_read)(struct intel_vgpu *, u64, void *,
-				unsigned int);
-	int (*emulate_mmio_write)(struct intel_vgpu *, u64, void *,
-				unsigned int);
-	struct intel_vgpu *(*vgpu_create)(struct intel_gvt *,
-				struct intel_vgpu_type *);
-	void (*vgpu_destroy)(struct intel_vgpu *vgpu);
-	void (*vgpu_release)(struct intel_vgpu *vgpu);
-	void (*vgpu_reset)(struct intel_vgpu *);
-	void (*vgpu_activate)(struct intel_vgpu *);
-	void (*vgpu_deactivate)(struct intel_vgpu *);
-	int (*vgpu_query_plane)(struct intel_vgpu *vgpu, void *);
-	int (*vgpu_get_dmabuf)(struct intel_vgpu *vgpu, unsigned int);
-	int (*write_protect_handler)(struct intel_vgpu *, u64, void *,
-				     unsigned int);
-	void (*emulate_hotplug)(struct intel_vgpu *vgpu, bool connected);
-};
-
-
 enum {
 	GVT_FAILSAFE_UNSUPPORTED_GUEST,
 	GVT_FAILSAFE_INSUFFICIENT_RESOURCE,

drivers/gpu/drm/i915/gvt/hypercall.h

@@ -42,7 +42,7 @@ struct device;
  * both Xen and KVM by providing dedicated hypervisor-related MPT modules.
  */
 struct intel_gvt_mpt {
-	int (*host_init)(struct device *dev, void *gvt, const void *ops);
+	int (*host_init)(struct device *dev, void *gvt);
 	void (*host_exit)(struct device *dev, void *gvt);
 	int (*attach_vgpu)(void *vgpu, unsigned long *handle);
 	void (*detach_vgpu)(void *vgpu);

drivers/gpu/drm/i915/gvt/kvmgt.c

@@ -55,8 +55,6 @@
 MODULE_IMPORT_NS(DMA_BUF);
 MODULE_IMPORT_NS(I915_GVT);
 
-static const struct intel_gvt_ops *intel_gvt_ops;
-
 /* helper macros copied from vfio-pci */
 #define VFIO_PCI_OFFSET_SHIFT   40
 #define VFIO_PCI_OFFSET_TO_INDEX(off)   (off >> VFIO_PCI_OFFSET_SHIFT)
@@ -621,9 +619,9 @@ static int handle_edid_regs(struct intel_vgpu *vgpu,
 					gvt_vgpu_err("invalid EDID blob\n");
 					return -EINVAL;
 				}
-				intel_gvt_ops->emulate_hotplug(vgpu, true);
+				intel_vgpu_emulate_hotplug(vgpu, true);
 			} else if (data == VFIO_DEVICE_GFX_LINK_STATE_DOWN)
-				intel_gvt_ops->emulate_hotplug(vgpu, false);
+				intel_vgpu_emulate_hotplug(vgpu, false);
 			else {
 				gvt_vgpu_err("invalid EDID link state %d\n",
 					regs->link_state);
@@ -825,7 +823,7 @@ static int intel_vgpu_create(struct mdev_device *mdev)
 		goto out;
 	}
 
-	vgpu = intel_gvt_ops->vgpu_create(gvt, type);
+	vgpu = intel_gvt_create_vgpu(gvt, type);
 	if (IS_ERR_OR_NULL(vgpu)) {
 		ret = vgpu == NULL ? -EFAULT : PTR_ERR(vgpu);
 		gvt_err("failed to create intel vgpu: %d\n", ret);
@@ -852,7 +850,7 @@ static int intel_vgpu_remove(struct mdev_device *mdev)
 	if (handle_valid(vgpu->handle))
 		return -EBUSY;
 
-	intel_gvt_ops->vgpu_destroy(vgpu);
+	intel_gvt_destroy_vgpu(vgpu);
 	return 0;
 }
 
@@ -955,7 +953,7 @@ static int intel_vgpu_open_device(struct mdev_device *mdev)
 	if (ret)
 		goto undo_group;
 
-	intel_gvt_ops->vgpu_activate(vgpu);
+	intel_gvt_activate_vgpu(vgpu);
 
 	atomic_set(&vdev->released, 0);
 	return ret;
@@ -1000,7 +998,7 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu)
 	if (atomic_cmpxchg(&vdev->released, 0, 1))
 		return;
 
-	intel_gvt_ops->vgpu_release(vgpu);
+	intel_gvt_release_vgpu(vgpu);
 
 	ret = vfio_unregister_notifier(mdev_dev(vdev->mdev), VFIO_IOMMU_NOTIFY,
 					&vdev->iommu_notifier);
@@ -1074,10 +1072,10 @@ static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, u64 off,
 	int ret;
 
 	if (is_write)
-		ret = intel_gvt_ops->emulate_mmio_write(vgpu,
+		ret = intel_vgpu_emulate_mmio_write(vgpu,
 					bar_start + off, buf, count);
 	else
-		ret = intel_gvt_ops->emulate_mmio_read(vgpu,
+		ret = intel_vgpu_emulate_mmio_read(vgpu,
 					bar_start + off, buf, count);
 	return ret;
 }
@@ -1133,10 +1131,10 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf,
 	switch (index) {
 	case VFIO_PCI_CONFIG_REGION_INDEX:
 		if (is_write)
-			ret = intel_gvt_ops->emulate_cfg_write(vgpu, pos,
+			ret = intel_vgpu_emulate_cfg_write(vgpu, pos,
 						buf, count);
 		else
-			ret = intel_gvt_ops->emulate_cfg_read(vgpu, pos,
+			ret = intel_vgpu_emulate_cfg_read(vgpu, pos,
 						buf, count);
 		break;
 	case VFIO_PCI_BAR0_REGION_INDEX:
@@ -1704,7 +1702,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
 
 		return ret;
 	} else if (cmd == VFIO_DEVICE_RESET) {
-		intel_gvt_ops->vgpu_reset(vgpu);
+		intel_gvt_reset_vgpu(vgpu);
 		return 0;
 	} else if (cmd == VFIO_DEVICE_QUERY_GFX_PLANE) {
 		struct vfio_device_gfx_plane_info dmabuf;
@@ -1717,7 +1715,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
 		if (dmabuf.argsz < minsz)
 			return -EINVAL;
 
-		ret = intel_gvt_ops->vgpu_query_plane(vgpu, &dmabuf);
+		ret = intel_vgpu_query_plane(vgpu, &dmabuf);
 		if (ret != 0)
 			return ret;
 
@@ -1725,14 +1723,10 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
 								-EFAULT : 0;
 	} else if (cmd == VFIO_DEVICE_GET_GFX_DMABUF) {
 		__u32 dmabuf_id;
-		__s32 dmabuf_fd;
 
 		if (get_user(dmabuf_id, (__u32 __user *)arg))
 			return -EFAULT;
-
-		dmabuf_fd = intel_gvt_ops->vgpu_get_dmabuf(vgpu, dmabuf_id);
-		return dmabuf_fd;
-
+		return intel_vgpu_get_dmabuf(vgpu, dmabuf_id);
 	}
 
 	return -ENOTTY;
@@ -1783,7 +1777,7 @@ static struct mdev_parent_ops intel_vgpu_mdev_ops = {
 	.ioctl			= intel_vgpu_ioctl,
 };
 
-static int kvmgt_host_init(struct device *dev, void *gvt, const void *ops)
+static int kvmgt_host_init(struct device *dev, void *gvt)
 {
 	int ret;
 
@@ -1791,7 +1785,6 @@ static int kvmgt_host_init(struct device *dev, void *gvt, const void *ops)
 	if (ret)
 		return ret;
 
-	intel_gvt_ops = ops;
 	intel_vgpu_mdev_ops.supported_type_groups = gvt_vgpu_type_groups;
 
 	ret = mdev_register_device(dev, &intel_vgpu_mdev_ops);
@@ -1883,7 +1876,7 @@ static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 					struct kvmgt_guest_info, track_node);
 
 	if (kvmgt_gfn_is_write_protected(info, gpa_to_gfn(gpa)))
-		intel_gvt_ops->write_protect_handler(info->vgpu, gpa,
+		intel_vgpu_page_track_handler(info->vgpu, gpa,
 						     (void *)val, len);
 }
 

drivers/gpu/drm/i915/gvt/mpt.h

@@ -51,13 +51,12 @@
  * Returns:
  * Zero on success, negative error code if failed
  */
-static inline int intel_gvt_hypervisor_host_init(struct device *dev,
-						 void *gvt, const void *ops)
+static inline int intel_gvt_hypervisor_host_init(struct device *dev, void *gvt)
 {
 	if (!intel_gvt_host.mpt->host_init)
 		return -ENODEV;
 
-	return intel_gvt_host.mpt->host_init(dev, gvt, ops);
+	return intel_gvt_host.mpt->host_init(dev, gvt);
 }
 
 /**