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path: root/drivers/gpu/drm/i915/gvt/vgpu.c
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Diffstat (limited to 'drivers/gpu/drm/i915/gvt/vgpu.c')
-rw-r--r--drivers/gpu/drm/i915/gvt/vgpu.c409
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 0000000..536d2b9
--- /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)
+{
+}
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