1 files changed, 223 insertions, 45 deletions

diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c
index 21b91313cc5d..c3efc3454ec2 100644
--- a/drivers/gpu/drm/i915/intel_gvt.c
+++ b/drivers/gpu/drm/i915/intel_gvt.c
@@ -21,9 +21,16 @@
  * SOFTWARE.
  */
 
+#include <drm/drm_print.h>
+
 #include "i915_drv.h"
 #include "i915_vgpu.h"
 #include "intel_gvt.h"
+#include "gem/i915_gem_dmabuf.h"
+#include "gt/intel_context.h"
+#include "gt/intel_ring.h"
+#include "gt/shmem_utils.h"
+#include <linux/vmalloc.h>
 
 /**
  * DOC: Intel GVT-g host support
@@ -37,9 +44,13 @@
  * To virtualize GPU resources GVT-g driver depends on hypervisor technology
  * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
  * and be virtualized within GVT-g device module. More architectural design
- * doc is available on https://01.org/group/2230/documentation-list.
+ * doc is available on https://github.com/intel/gvt-linux/wiki.
  */
 
+static LIST_HEAD(intel_gvt_devices);
+static const struct intel_vgpu_ops *intel_gvt_ops;
+static DEFINE_MUTEX(intel_gvt_mutex);
+
 static bool is_supported_device(struct drm_i915_private *dev_priv)
 {
 	if (IS_BROADWELL(dev_priv))
@@ -52,36 +63,168 @@ static bool is_supported_device(struct drm_i915_private *dev_priv)
 		return true;
 	if (IS_COFFEELAKE(dev_priv))
 		return true;
+	if (IS_COMETLAKE(dev_priv))
+		return true;
 
 	return false;
 }
 
-/**
- * intel_gvt_sanitize_options - sanitize GVT related options
- * @dev_priv: drm i915 private data
- *
- * This function is called at the i915 options sanitize stage.
- */
-void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
+static void free_initial_hw_state(struct drm_i915_private *dev_priv)
 {
-	if (!i915_modparams.enable_gvt)
+	struct i915_virtual_gpu *vgpu = &dev_priv->vgpu;
+
+	vfree(vgpu->initial_mmio);
+	vgpu->initial_mmio = NULL;
+
+	kfree(vgpu->initial_cfg_space);
+	vgpu->initial_cfg_space = NULL;
+}
+
+static void save_mmio(struct intel_gvt_mmio_table_iter *iter, u32 offset,
+		      u32 size)
+{
+	struct drm_i915_private *dev_priv = iter->i915;
+	u32 *mmio, i;
+
+	for (i = offset; i < offset + size; i += 4) {
+		mmio = iter->data + i;
+		*mmio = intel_uncore_read_notrace(to_gt(dev_priv)->uncore,
+						  _MMIO(i));
+	}
+}
+
+static int handle_mmio(struct intel_gvt_mmio_table_iter *iter,
+		       u32 offset, u32 size)
+{
+	if (WARN_ON(!IS_ALIGNED(offset, 4)))
+		return -EINVAL;
+
+	save_mmio(iter, offset, size);
+	return 0;
+}
+
+static int save_initial_hw_state(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
+	struct i915_virtual_gpu *vgpu = &dev_priv->vgpu;
+	struct intel_gvt_mmio_table_iter iter;
+	void *mem;
+	int i, ret;
+
+	mem = kzalloc(PCI_CFG_SPACE_EXP_SIZE, GFP_KERNEL);
+	if (!mem)
+		return -ENOMEM;
+
+	vgpu->initial_cfg_space = mem;
+
+	for (i = 0; i < PCI_CFG_SPACE_EXP_SIZE; i += 4)
+		pci_read_config_dword(pdev, i, mem + i);
+
+	mem = vzalloc(2 * SZ_1M);
+	if (!mem) {
+		ret = -ENOMEM;
+		goto err_mmio;
+	}
+
+	vgpu->initial_mmio = mem;
+
+	iter.i915 = dev_priv;
+	iter.data = vgpu->initial_mmio;
+	iter.handle_mmio_cb = handle_mmio;
+
+	ret = intel_gvt_iterate_mmio_table(&iter);
+	if (ret)
+		goto err_iterate;
+
+	return 0;
+
+err_iterate:
+	vfree(vgpu->initial_mmio);
+	vgpu->initial_mmio = NULL;
+err_mmio:
+	kfree(vgpu->initial_cfg_space);
+	vgpu->initial_cfg_space = NULL;
+
+	return ret;
+}
+
+static void intel_gvt_init_device(struct drm_i915_private *dev_priv)
+{
+	if (!dev_priv->params.enable_gvt) {
+		drm_dbg(&dev_priv->drm,
+			"GVT-g is disabled by kernel params\n");
 		return;
+	}
 
 	if (intel_vgpu_active(dev_priv)) {
 		drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
-		goto bail;
+		return;
 	}
 
 	if (!is_supported_device(dev_priv)) {
 		drm_info(&dev_priv->drm,
 			 "Unsupported device. GVT-g is disabled\n");
-		goto bail;
+		return;
+	}
+
+	if (intel_uc_wants_guc_submission(&to_gt(dev_priv)->uc)) {
+		drm_err(&dev_priv->drm,
+			"Graphics virtualization is not yet supported with GuC submission\n");
+		return;
+	}
+
+	if (save_initial_hw_state(dev_priv)) {
+		drm_dbg(&dev_priv->drm, "Failed to save initial HW state\n");
+		return;
 	}
 
-	return;
-bail:
-	i915_modparams.enable_gvt = 0;
+	if (intel_gvt_ops->init_device(dev_priv))
+		drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
+}
+
+static void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
+{
+	if (dev_priv->gvt)
+		intel_gvt_ops->clean_device(dev_priv);
+	free_initial_hw_state(dev_priv);
+}
+
+int intel_gvt_set_ops(const struct intel_vgpu_ops *ops)
+{
+	struct drm_i915_private *dev_priv;
+
+	mutex_lock(&intel_gvt_mutex);
+	if (intel_gvt_ops) {
+		mutex_unlock(&intel_gvt_mutex);
+		return -EINVAL;
+	}
+	intel_gvt_ops = ops;
+
+	list_for_each_entry(dev_priv, &intel_gvt_devices, vgpu.entry)
+		intel_gvt_init_device(dev_priv);
+	mutex_unlock(&intel_gvt_mutex);
+
+	return 0;
 }
+EXPORT_SYMBOL_NS_GPL(intel_gvt_set_ops, "I915_GVT");
+
+void intel_gvt_clear_ops(const struct intel_vgpu_ops *ops)
+{
+	struct drm_i915_private *dev_priv;
+
+	mutex_lock(&intel_gvt_mutex);
+	if (intel_gvt_ops != ops) {
+		mutex_unlock(&intel_gvt_mutex);
+		return;
+	}
+
+	list_for_each_entry(dev_priv, &intel_gvt_devices, vgpu.entry)
+		intel_gvt_clean_device(dev_priv);
+
+	intel_gvt_ops = NULL;
+	mutex_unlock(&intel_gvt_mutex);
+}
+EXPORT_SYMBOL_NS_GPL(intel_gvt_clear_ops, "I915_GVT");
 
 /**
  * intel_gvt_init - initialize GVT components
@@ -95,41 +238,18 @@ bail:
  */
 int intel_gvt_init(struct drm_i915_private *dev_priv)
 {
-	int ret;
-
 	if (i915_inject_probe_failure(dev_priv))
 		return -ENODEV;
 
-	if (!i915_modparams.enable_gvt) {
-		drm_dbg(&dev_priv->drm,
-			"GVT-g is disabled by kernel params\n");
-		return 0;
-	}
-
-	if (intel_uc_wants_guc_submission(&dev_priv->gt.uc)) {
-		drm_err(&dev_priv->drm,
-			"i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n");
-		return -EIO;
-	}
-
-	ret = intel_gvt_init_device(dev_priv);
-	if (ret) {
-		drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
-		goto bail;
-	}
-
-	return 0;
+	mutex_lock(&intel_gvt_mutex);
+	list_add_tail(&dev_priv->vgpu.entry, &intel_gvt_devices);
+	if (intel_gvt_ops)
+		intel_gvt_init_device(dev_priv);
+	mutex_unlock(&intel_gvt_mutex);
 
-bail:
-	i915_modparams.enable_gvt = 0;
 	return 0;
 }
 
-static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
-{
-	return dev_priv->gvt;
-}
-
 /**
  * intel_gvt_driver_remove - cleanup GVT components when i915 driver is
  *			     unbinding
@@ -140,8 +260,66 @@ static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
  */
 void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
 {
-	if (!intel_gvt_active(dev_priv))
-		return;
-
+	mutex_lock(&intel_gvt_mutex);
 	intel_gvt_clean_device(dev_priv);
+	list_del(&dev_priv->vgpu.entry);
+	mutex_unlock(&intel_gvt_mutex);
+}
+
+/**
+ * intel_gvt_resume - GVT resume routine wrapper
+ *
+ * @dev_priv: drm i915 private *
+ *
+ * This function is called at the i915 driver resume stage to restore required
+ * HW status for GVT so that vGPU can continue running after resumed.
+ */
+void intel_gvt_resume(struct drm_i915_private *dev_priv)
+{
+	mutex_lock(&intel_gvt_mutex);
+	if (dev_priv->gvt)
+		intel_gvt_ops->pm_resume(dev_priv);
+	mutex_unlock(&intel_gvt_mutex);
 }
+
+/*
+ * Exported here so that the exports only get created when GVT support is
+ * actually enabled.
+ */
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_alloc, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_create_shmem, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_init, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_ggtt_pin_ww, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_pin_map, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_set_to_cpu_domain, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(__i915_gem_object_flush_map, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(__i915_gem_object_set_pages, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_gtt_insert, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_prime_export, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_init, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_backoff, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_fini, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_ppgtt_create, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_request_add, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_request_create, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_request_wait, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_reserve_fence, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_unreserve_fence, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_vm_release, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(_i915_vma_move_to_active, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(intel_context_create, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(__intel_context_do_pin, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(__intel_context_do_unpin, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(intel_ring_begin, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_get, "I915_GVT");
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put, "I915_GVT");
+#endif
+EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put_unchecked, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_for_reg, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_get, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_put, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(shmem_pin_map, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(shmem_unpin_map, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(__px_dma, "I915_GVT");
+EXPORT_SYMBOL_NS_GPL(i915_fence_ops, "I915_GVT");