1 files changed, 409 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
new file mode 100644
index 000000000000..536d2b9d5777
--- /dev/null
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -0,0 +1,409 @@
+/*
+ * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Eddie Dong <eddie.dong@intel.com>
+ *    Kevin Tian <kevin.tian@intel.com>
+ *
+ * Contributors:
+ *    Ping Gao <ping.a.gao@intel.com>
+ *    Zhi Wang <zhi.a.wang@intel.com>
+ *    Bing Niu <bing.niu@intel.com>
+ *
+ */
+
+#include "i915_drv.h"
+#include "gvt.h"
+#include "i915_pvinfo.h"
+
+static void clean_vgpu_mmio(struct intel_vgpu *vgpu)
+{
+	vfree(vgpu->mmio.vreg);
+	vgpu->mmio.vreg = vgpu->mmio.sreg = NULL;
+}
+
+int setup_vgpu_mmio(struct intel_vgpu *vgpu)
+{
+	struct intel_gvt *gvt = vgpu->gvt;
+	const struct intel_gvt_device_info *info = &gvt->device_info;
+
+	if (vgpu->mmio.vreg)
+		memset(vgpu->mmio.vreg, 0, info->mmio_size * 2);
+	else {
+		vgpu->mmio.vreg = vzalloc(info->mmio_size * 2);
+		if (!vgpu->mmio.vreg)
+			return -ENOMEM;
+	}
+
+	vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size;
+
+	memcpy(vgpu->mmio.vreg, gvt->firmware.mmio, info->mmio_size);
+	memcpy(vgpu->mmio.sreg, gvt->firmware.mmio, info->mmio_size);
+
+	vgpu_vreg(vgpu, GEN6_GT_THREAD_STATUS_REG) = 0;
+
+	/* set the bit 0:2(Core C-State ) to C0 */
+	vgpu_vreg(vgpu, GEN6_GT_CORE_STATUS) = 0;
+	return 0;
+}
+
+static void setup_vgpu_cfg_space(struct intel_vgpu *vgpu,
+	struct intel_vgpu_creation_params *param)
+{
+	struct intel_gvt *gvt = vgpu->gvt;
+	const struct intel_gvt_device_info *info = &gvt->device_info;
+	u16 *gmch_ctl;
+	int i;
+
+	memcpy(vgpu_cfg_space(vgpu), gvt->firmware.cfg_space,
+	       info->cfg_space_size);
+
+	if (!param->primary) {
+		vgpu_cfg_space(vgpu)[PCI_CLASS_DEVICE] =
+			INTEL_GVT_PCI_CLASS_VGA_OTHER;
+		vgpu_cfg_space(vgpu)[PCI_CLASS_PROG] =
+			INTEL_GVT_PCI_CLASS_VGA_OTHER;
+	}
+
+	/* Show guest that there isn't any stolen memory.*/
+	gmch_ctl = (u16 *)(vgpu_cfg_space(vgpu) + INTEL_GVT_PCI_GMCH_CONTROL);
+	*gmch_ctl &= ~(BDW_GMCH_GMS_MASK << BDW_GMCH_GMS_SHIFT);
+
+	intel_vgpu_write_pci_bar(vgpu, PCI_BASE_ADDRESS_2,
+				 gvt_aperture_pa_base(gvt), true);
+
+	vgpu_cfg_space(vgpu)[PCI_COMMAND] &= ~(PCI_COMMAND_IO
+					     | PCI_COMMAND_MEMORY
+					     | PCI_COMMAND_MASTER);
+	/*
+	 * Clear the bar upper 32bit and let guest to assign the new value
+	 */
+	memset(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_1, 0, 4);
+	memset(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_3, 0, 4);
+	memset(vgpu_cfg_space(vgpu) + INTEL_GVT_PCI_OPREGION, 0, 4);
+
+	for (i = 0; i < INTEL_GVT_MAX_BAR_NUM; i++) {
+		vgpu->cfg_space.bar[i].size = pci_resource_len(
+					      gvt->dev_priv->drm.pdev, i * 2);
+		vgpu->cfg_space.bar[i].tracked = false;
+	}
+}
+
+void populate_pvinfo_page(struct intel_vgpu *vgpu)
+{
+	/* setup the ballooning information */
+	vgpu_vreg64(vgpu, vgtif_reg(magic)) = VGT_MAGIC;
+	vgpu_vreg(vgpu, vgtif_reg(version_major)) = 1;
+	vgpu_vreg(vgpu, vgtif_reg(version_minor)) = 0;
+	vgpu_vreg(vgpu, vgtif_reg(display_ready)) = 0;
+	vgpu_vreg(vgpu, vgtif_reg(vgt_id)) = vgpu->id;
+	vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) =
+		vgpu_aperture_gmadr_base(vgpu);
+	vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) =
+		vgpu_aperture_sz(vgpu);
+	vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) =
+		vgpu_hidden_gmadr_base(vgpu);
+	vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) =
+		vgpu_hidden_sz(vgpu);
+
+	vgpu_vreg(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);
+
+	gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id);
+	gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n",
+		vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu));
+	gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n",
+		vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu));
+	gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu));
+
+	WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
+}
+
+/**
+ * intel_gvt_init_vgpu_types - initialize vGPU type list
+ * @gvt : GVT device
+ *
+ * Initialize vGPU type list based on available resource.
+ *
+ */
+int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
+{
+	unsigned int num_types;
+	unsigned int i, low_avail;
+	unsigned int min_low;
+
+	/* vGPU type name is defined as GVTg_Vx_y which contains
+	 * physical GPU generation type and 'y' means maximum vGPU
+	 * instances user can create on one physical GPU for this
+	 * type.
+	 *
+	 * Depend on physical SKU resource, might see vGPU types like
+	 * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create
+	 * different types of vGPU on same physical GPU depending on
+	 * available resource. Each vGPU type will have "avail_instance"
+	 * to indicate how many vGPU instance can be created for this
+	 * type.
+	 *
+	 * Currently use static size here as we init type earlier..
+	 */
+	low_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE;
+	num_types = 4;
+
+	gvt->types = kzalloc(num_types * sizeof(struct intel_vgpu_type),
+			     GFP_KERNEL);
+	if (!gvt->types)
+		return -ENOMEM;
+
+	min_low = MB_TO_BYTES(32);
+	for (i = 0; i < num_types; ++i) {
+		if (low_avail / min_low == 0)
+			break;
+		gvt->types[i].low_gm_size = min_low;
+		gvt->types[i].high_gm_size = 3 * gvt->types[i].low_gm_size;
+		gvt->types[i].fence = 4;
+		gvt->types[i].max_instance = low_avail / min_low;
+		gvt->types[i].avail_instance = gvt->types[i].max_instance;
+
+		if (IS_GEN8(gvt->dev_priv))
+			sprintf(gvt->types[i].name, "GVTg_V4_%u",
+						gvt->types[i].max_instance);
+		else if (IS_GEN9(gvt->dev_priv))
+			sprintf(gvt->types[i].name, "GVTg_V5_%u",
+						gvt->types[i].max_instance);
+
+		min_low <<= 1;
+		gvt_dbg_core("type[%d]: %s max %u avail %u low %u high %u fence %u\n",
+			     i, gvt->types[i].name, gvt->types[i].max_instance,
+			     gvt->types[i].avail_instance,
+			     gvt->types[i].low_gm_size,
+			     gvt->types[i].high_gm_size, gvt->types[i].fence);
+	}
+
+	gvt->num_types = i;
+	return 0;
+}
+
+void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
+{
+	kfree(gvt->types);
+}
+
+static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
+{
+	int i;
+	unsigned int low_gm_avail, high_gm_avail, fence_avail;
+	unsigned int low_gm_min, high_gm_min, fence_min, total_min;
+
+	/* Need to depend on maxium hw resource size but keep on
+	 * static config for now.
+	 */
+	low_gm_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE -
+		gvt->gm.vgpu_allocated_low_gm_size;
+	high_gm_avail = MB_TO_BYTES(256) * 3 - HOST_HIGH_GM_SIZE -
+		gvt->gm.vgpu_allocated_high_gm_size;
+	fence_avail = gvt_fence_sz(gvt) - HOST_FENCE -
+		gvt->fence.vgpu_allocated_fence_num;
+
+	for (i = 0; i < gvt->num_types; i++) {
+		low_gm_min = low_gm_avail / gvt->types[i].low_gm_size;
+		high_gm_min = high_gm_avail / gvt->types[i].high_gm_size;
+		fence_min = fence_avail / gvt->types[i].fence;
+		total_min = min(min(low_gm_min, high_gm_min), fence_min);
+		gvt->types[i].avail_instance = min(gvt->types[i].max_instance,
+						   total_min);
+
+		gvt_dbg_core("update type[%d]: %s max %u avail %u low %u high %u fence %u\n",
+		       i, gvt->types[i].name, gvt->types[i].max_instance,
+		       gvt->types[i].avail_instance, gvt->types[i].low_gm_size,
+		       gvt->types[i].high_gm_size, gvt->types[i].fence);
+	}
+}
+
+/**
+ * intel_gvt_destroy_vgpu - destroy a virtual GPU
+ * @vgpu: virtual GPU
+ *
+ * This function is called when user wants to destroy a virtual GPU.
+ *
+ */
+void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
+{
+	struct intel_gvt *gvt = vgpu->gvt;
+
+	mutex_lock(&gvt->lock);
+
+	vgpu->active = false;
+	idr_remove(&gvt->vgpu_idr, vgpu->id);
+
+	if (atomic_read(&vgpu->running_workload_num)) {
+		mutex_unlock(&gvt->lock);
+		intel_gvt_wait_vgpu_idle(vgpu);
+		mutex_lock(&gvt->lock);
+	}
+
+	intel_vgpu_stop_schedule(vgpu);
+	intel_vgpu_clean_sched_policy(vgpu);
+	intel_vgpu_clean_gvt_context(vgpu);
+	intel_vgpu_clean_execlist(vgpu);
+	intel_vgpu_clean_display(vgpu);
+	intel_vgpu_clean_opregion(vgpu);
+	intel_vgpu_clean_gtt(vgpu);
+	intel_gvt_hypervisor_detach_vgpu(vgpu);
+	intel_vgpu_free_resource(vgpu);
+	clean_vgpu_mmio(vgpu);
+	vfree(vgpu);
+
+	intel_gvt_update_vgpu_types(gvt);
+	mutex_unlock(&gvt->lock);
+}
+
+static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
+		struct intel_vgpu_creation_params *param)
+{
+	struct intel_vgpu *vgpu;
+	int ret;
+
+	gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n",
+			param->handle, param->low_gm_sz, param->high_gm_sz,
+			param->fence_sz);
+
+	vgpu = vzalloc(sizeof(*vgpu));
+	if (!vgpu)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_lock(&gvt->lock);
+
+	ret = idr_alloc(&gvt->vgpu_idr, vgpu, 1, GVT_MAX_VGPU, GFP_KERNEL);
+	if (ret < 0)
+		goto out_free_vgpu;
+
+	vgpu->id = ret;
+	vgpu->handle = param->handle;
+	vgpu->gvt = gvt;
+	bitmap_zero(vgpu->tlb_handle_pending, I915_NUM_ENGINES);
+
+	setup_vgpu_cfg_space(vgpu, param);
+
+	ret = setup_vgpu_mmio(vgpu);
+	if (ret)
+		goto out_free_vgpu;
+
+	ret = intel_vgpu_alloc_resource(vgpu, param);
+	if (ret)
+		goto out_clean_vgpu_mmio;
+
+	populate_pvinfo_page(vgpu);
+
+	ret = intel_gvt_hypervisor_attach_vgpu(vgpu);
+	if (ret)
+		goto out_clean_vgpu_resource;
+
+	ret = intel_vgpu_init_gtt(vgpu);
+	if (ret)
+		goto out_detach_hypervisor_vgpu;
+
+	ret = intel_vgpu_init_display(vgpu);
+	if (ret)
+		goto out_clean_gtt;
+
+	ret = intel_vgpu_init_execlist(vgpu);
+	if (ret)
+		goto out_clean_display;
+
+	ret = intel_vgpu_init_gvt_context(vgpu);
+	if (ret)
+		goto out_clean_execlist;
+
+	ret = intel_vgpu_init_sched_policy(vgpu);
+	if (ret)
+		goto out_clean_shadow_ctx;
+
+	vgpu->active = true;
+	mutex_unlock(&gvt->lock);
+
+	return vgpu;
+
+out_clean_shadow_ctx:
+	intel_vgpu_clean_gvt_context(vgpu);
+out_clean_execlist:
+	intel_vgpu_clean_execlist(vgpu);
+out_clean_display:
+	intel_vgpu_clean_display(vgpu);
+out_clean_gtt:
+	intel_vgpu_clean_gtt(vgpu);
+out_detach_hypervisor_vgpu:
+	intel_gvt_hypervisor_detach_vgpu(vgpu);
+out_clean_vgpu_resource:
+	intel_vgpu_free_resource(vgpu);
+out_clean_vgpu_mmio:
+	clean_vgpu_mmio(vgpu);
+out_free_vgpu:
+	vfree(vgpu);
+	mutex_unlock(&gvt->lock);
+	return ERR_PTR(ret);
+}
+
+/**
+ * intel_gvt_create_vgpu - create a virtual GPU
+ * @gvt: GVT device
+ * @type: type of the vGPU to create
+ *
+ * This function is called when user wants to create a virtual GPU.
+ *
+ * Returns:
+ * pointer to intel_vgpu, error pointer if failed.
+ */
+struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
+				struct intel_vgpu_type *type)
+{
+	struct intel_vgpu_creation_params param;
+	struct intel_vgpu *vgpu;
+
+	param.handle = 0;
+	param.primary = 1;
+	param.low_gm_sz = type->low_gm_size;
+	param.high_gm_sz = type->high_gm_size;
+	param.fence_sz = type->fence;
+
+	/* XXX current param based on MB */
+	param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz);
+	param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz);
+
+	vgpu = __intel_gvt_create_vgpu(gvt, &param);
+	if (IS_ERR(vgpu))
+		return vgpu;
+
+	/* calculate left instance change for types */
+	intel_gvt_update_vgpu_types(gvt);
+
+	return vgpu;
+}
+
+/**
+ * intel_gvt_reset_vgpu - reset a virtual GPU
+ * @vgpu: virtual GPU
+ *
+ * This function is called when user wants to reset a virtual GPU.
+ *
+ */
+void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
+{
+}