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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
drm/i915/gvt: move the gvt code into kvmgt.ko
Instead of having an option to build the gvt code into the main i915 module, just move it into the kvmgt.ko module. This only requires a new struct with three entries that the KVMGT modules needs to register with the main i915 module, and a proper list of GVT-enabled devices instead of global device pointer. 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/20220411141403.86980-7-hch@lst.de Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
This commit is contained in:
Christoph Hellwig
Zhi Wang
parent
f49fc35799
commit
8b750bf744
12 changed files with 195 additions and 156 deletions
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@ -102,40 +102,30 @@ config DRM_I915_USERPTR
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If in doubt, say "Y".
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config DRM_I915_GVT
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bool "Enable Intel GVT-g graphics virtualization host support"
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bool
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config DRM_I915_GVT_KVMGT
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tristate "Enable KVM host support Intel GVT-g graphics virtualization"
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depends on DRM_I915
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depends on X86
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depends on 64BIT
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default n
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depends on KVM
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depends on VFIO_MDEV
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select DRM_I915_GVT
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select KVM_EXTERNAL_WRITE_TRACKING
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help
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Choose this option if you want to enable Intel GVT-g graphics
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virtualization technology host support with integrated graphics.
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With GVT-g, it's possible to have one integrated graphics
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device shared by multiple VMs under different hypervisors.
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device shared by multiple VMs under KVM.
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Note that at least one hypervisor like Xen or KVM is required for
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this driver to work, and it only supports newer device from
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Broadwell+. For further information and setup guide, you can
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visit: http://01.org/igvt-g.
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Now it's just a stub to support the modifications of i915 for
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GVT device model. It requires at least one MPT modules for Xen/KVM
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and other components of GVT device model to work. Use it under
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you own risk.
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Note that this driver only supports newer device from Broadwell on.
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For further information and setup guide, you can visit:
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http://01.org/igvt-g.
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If in doubt, say "N".
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config DRM_I915_GVT_KVMGT
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tristate "Enable KVM/VFIO support for Intel GVT-g"
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depends on DRM_I915_GVT
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depends on KVM
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depends on VFIO_MDEV
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select KVM_EXTERNAL_WRITE_TRACKING
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default n
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help
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Choose this option if you want to enable KVMGT support for
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Intel GVT-g.
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config DRM_I915_PXP
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bool "Enable Intel PXP support"
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depends on DRM_I915
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@ -326,7 +326,7 @@ i915-$(CONFIG_DRM_I915_GVT) += \
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include $(src)/gvt/Makefile
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obj-$(CONFIG_DRM_I915) += i915.o
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obj-$(CONFIG_DRM_I915_GVT_KVMGT) += gvt/kvmgt.o
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obj-$(CONFIG_DRM_I915_GVT_KVMGT) += kvmgt.o
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# header test
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@ -1,6 +1,6 @@
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# SPDX-License-Identifier: GPL-2.0
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i915-$(CONFIG_DRM_I915_GVT) += \
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kvmgt-$(CONFIG_DRM_I915_GVT) += \
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gvt/aperture_gm.o \
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gvt/cfg_space.o \
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gvt/cmd_parser.o \
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@ -15,6 +15,7 @@ i915-$(CONFIG_DRM_I915_GVT) += \
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gvt/gvt.o \
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gvt/handlers.o \
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gvt/interrupt.o \
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gvt/kvmgt.o \
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gvt/mmio.o \
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gvt/mmio_context.o \
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gvt/opregion.o \
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@ -39,8 +39,6 @@
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#include <linux/vfio.h>
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#include <linux/mdev.h>
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struct intel_gvt_host intel_gvt_host;
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static const struct intel_gvt_ops intel_gvt_ops = {
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.emulate_cfg_read = intel_vgpu_emulate_cfg_read,
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.emulate_cfg_write = intel_vgpu_emulate_cfg_write,
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@ -147,13 +145,14 @@ static int init_service_thread(struct intel_gvt *gvt)
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* resources owned by a GVT device.
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*
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*/
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void intel_gvt_clean_device(struct drm_i915_private *i915)
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static void intel_gvt_clean_device(struct drm_i915_private *i915)
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{
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struct intel_gvt *gvt = fetch_and_zero(&i915->gvt);
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if (drm_WARN_ON(&i915->drm, !gvt))
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return;
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intel_gvt_hypervisor_host_exit(i915->drm.dev, gvt);
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intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
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intel_gvt_clean_vgpu_types(gvt);
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@ -181,7 +180,7 @@ void intel_gvt_clean_device(struct drm_i915_private *i915)
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* Zero on success, negative error code if failed.
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*
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*/
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int intel_gvt_init_device(struct drm_i915_private *i915)
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static int intel_gvt_init_device(struct drm_i915_private *i915)
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{
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struct intel_gvt *gvt;
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struct intel_vgpu *vgpu;
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@ -253,11 +252,17 @@ int intel_gvt_init_device(struct drm_i915_private *i915)
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intel_gvt_debugfs_init(gvt);
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ret = intel_gvt_hypervisor_host_init(i915->drm.dev, gvt,
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&intel_gvt_ops);
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if (ret)
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goto out_destroy_idle_vgpu;
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gvt_dbg_core("gvt device initialization is done\n");
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intel_gvt_host.dev = i915->drm.dev;
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intel_gvt_host.initialized = true;
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return 0;
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out_destroy_idle_vgpu:
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intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
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intel_gvt_debugfs_clean(gvt);
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out_clean_types:
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intel_gvt_clean_vgpu_types(gvt);
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out_clean_thread:
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@ -281,39 +286,17 @@ int intel_gvt_init_device(struct drm_i915_private *i915)
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return ret;
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}
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int
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intel_gvt_pm_resume(struct intel_gvt *gvt)
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static void intel_gvt_pm_resume(struct drm_i915_private *i915)
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{
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struct intel_gvt *gvt = i915->gvt;
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intel_gvt_restore_fence(gvt);
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intel_gvt_restore_mmio(gvt);
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intel_gvt_restore_ggtt(gvt);
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return 0;
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}
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int
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intel_gvt_register_hypervisor(const struct intel_gvt_mpt *m)
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{
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int ret;
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void *gvt;
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if (!intel_gvt_host.initialized)
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return -ENODEV;
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intel_gvt_host.mpt = m;
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gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
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ret = intel_gvt_hypervisor_host_init(intel_gvt_host.dev, gvt,
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&intel_gvt_ops);
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if (ret < 0)
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return -ENODEV;
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return 0;
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}
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EXPORT_SYMBOL_GPL(intel_gvt_register_hypervisor);
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void
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intel_gvt_unregister_hypervisor(void)
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{
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void *gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
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intel_gvt_hypervisor_host_exit(intel_gvt_host.dev, gvt);
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}
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EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);
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const struct intel_vgpu_ops intel_gvt_vgpu_ops = {
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.init_device = intel_gvt_init_device,
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.clean_device = intel_gvt_clean_device,
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.pm_resume = intel_gvt_pm_resume,
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};
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@ -58,8 +58,6 @@
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#define GVT_MAX_VGPU 8
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struct intel_gvt_host {
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struct device *dev;
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bool initialized;
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const struct intel_gvt_mpt *mpt;
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};
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@ -728,9 +726,9 @@ void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu);
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void intel_gvt_debugfs_init(struct intel_gvt *gvt);
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void intel_gvt_debugfs_clean(struct intel_gvt *gvt);
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int intel_gvt_pm_resume(struct intel_gvt *gvt);
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#include "trace.h"
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#include "mpt.h"
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extern const struct intel_vgpu_ops intel_gvt_vgpu_ops;
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#endif
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@ -49,8 +49,12 @@
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#include <drm/drm_edid.h>
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#include "i915_drv.h"
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#include "intel_gvt.h"
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#include "gvt.h"
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MODULE_IMPORT_NS(DMA_BUF);
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MODULE_IMPORT_NS(I915_GVT);
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static const struct intel_gvt_ops *intel_gvt_ops;
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/* helper macros copied from vfio-pci */
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@ -2242,16 +2246,18 @@ static const struct intel_gvt_mpt kvmgt_mpt = {
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.is_valid_gfn = kvmgt_is_valid_gfn,
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};
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struct intel_gvt_host intel_gvt_host = {
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.mpt = &kvmgt_mpt,
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};
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static int __init kvmgt_init(void)
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{
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if (intel_gvt_register_hypervisor(&kvmgt_mpt) < 0)
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return -ENODEV;
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return 0;
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return intel_gvt_set_ops(&intel_gvt_vgpu_ops);
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}
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static void __exit kvmgt_exit(void)
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{
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intel_gvt_unregister_hypervisor();
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intel_gvt_clear_ops(&intel_gvt_vgpu_ops);
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}
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module_init(kvmgt_init);
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@ -394,7 +394,4 @@ static inline bool intel_gvt_hypervisor_is_valid_gfn(
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return intel_gvt_host.mpt->is_valid_gfn(vgpu->handle, gfn);
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}
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int intel_gvt_register_hypervisor(const struct intel_gvt_mpt *);
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void intel_gvt_unregister_hypervisor(void);
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#endif /* _GVT_MPT_H_ */
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@ -468,11 +468,6 @@ static void i915_driver_mmio_release(struct drm_i915_private *dev_priv)
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pci_dev_put(dev_priv->bridge_dev);
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}
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static void intel_sanitize_options(struct drm_i915_private *dev_priv)
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{
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intel_gvt_sanitize_options(dev_priv);
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}
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/**
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* i915_set_dma_info - set all relevant PCI dma info as configured for the
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* platform
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@ -566,8 +561,6 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
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}
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}
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intel_sanitize_options(dev_priv);
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/* needs to be done before ggtt probe */
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intel_dram_edram_detect(dev_priv);
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@ -434,6 +434,7 @@ struct i915_virtual_gpu {
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u32 caps;
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u32 *initial_mmio;
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u8 *initial_cfg_space;
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struct list_head entry;
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};
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struct i915_selftest_stash {
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@ -24,7 +24,10 @@
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#include "i915_drv.h"
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#include "i915_vgpu.h"
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#include "intel_gvt.h"
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#include "gvt/gvt.h"
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#include "gem/i915_gem_dmabuf.h"
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#include "gt/intel_context.h"
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#include "gt/intel_ring.h"
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#include "gt/shmem_utils.h"
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/**
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* DOC: Intel GVT-g host support
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@ -41,6 +44,10 @@
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* doc is available on https://01.org/group/2230/documentation-list.
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*/
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static LIST_HEAD(intel_gvt_devices);
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static const struct intel_vgpu_ops *intel_gvt_ops;
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static DEFINE_MUTEX(intel_gvt_mutex);
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static bool is_supported_device(struct drm_i915_private *dev_priv)
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{
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if (IS_BROADWELL(dev_priv))
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@ -59,33 +66,6 @@ static bool is_supported_device(struct drm_i915_private *dev_priv)
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return false;
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}
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/**
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* intel_gvt_sanitize_options - sanitize GVT related options
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* @dev_priv: drm i915 private data
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*
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* This function is called at the i915 options sanitize stage.
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*/
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void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
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{
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if (!dev_priv->params.enable_gvt)
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return;
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if (intel_vgpu_active(dev_priv)) {
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drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
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goto bail;
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}
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if (!is_supported_device(dev_priv)) {
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drm_info(&dev_priv->drm,
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"Unsupported device. GVT-g is disabled\n");
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goto bail;
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}
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return;
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bail:
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dev_priv->params.enable_gvt = 0;
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}
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static void free_initial_hw_state(struct drm_i915_private *dev_priv)
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{
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struct i915_virtual_gpu *vgpu = &dev_priv->vgpu;
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@ -165,6 +145,84 @@ static int save_initial_hw_state(struct drm_i915_private *dev_priv)
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return ret;
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}
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static void intel_gvt_init_device(struct drm_i915_private *dev_priv)
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{
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if (!dev_priv->params.enable_gvt) {
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drm_dbg(&dev_priv->drm,
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"GVT-g is disabled by kernel params\n");
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return;
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}
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if (intel_vgpu_active(dev_priv)) {
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drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
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return;
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}
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if (!is_supported_device(dev_priv)) {
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drm_info(&dev_priv->drm,
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"Unsupported device. GVT-g is disabled\n");
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return;
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}
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if (intel_uc_wants_guc_submission(&to_gt(dev_priv)->uc)) {
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drm_err(&dev_priv->drm,
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"Graphics virtualization is not yet supported with GuC submission\n");
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return;
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}
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if (save_initial_hw_state(dev_priv)) {
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drm_dbg(&dev_priv->drm, "Failed to save initial HW state\n");
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return;
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}
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if (intel_gvt_ops->init_device(dev_priv))
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drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
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}
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static void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
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{
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if (dev_priv->gvt)
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intel_gvt_ops->clean_device(dev_priv);
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free_initial_hw_state(dev_priv);
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}
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int intel_gvt_set_ops(const struct intel_vgpu_ops *ops)
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{
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struct drm_i915_private *dev_priv;
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mutex_lock(&intel_gvt_mutex);
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if (intel_gvt_ops) {
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mutex_unlock(&intel_gvt_mutex);
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return -EINVAL;
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}
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intel_gvt_ops = ops;
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list_for_each_entry(dev_priv, &intel_gvt_devices, vgpu.entry)
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intel_gvt_init_device(dev_priv);
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mutex_unlock(&intel_gvt_mutex);
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return 0;
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}
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EXPORT_SYMBOL_NS_GPL(intel_gvt_set_ops, I915_GVT);
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void intel_gvt_clear_ops(const struct intel_vgpu_ops *ops)
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{
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struct drm_i915_private *dev_priv;
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mutex_lock(&intel_gvt_mutex);
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if (intel_gvt_ops != ops) {
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mutex_unlock(&intel_gvt_mutex);
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return;
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}
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list_for_each_entry(dev_priv, &intel_gvt_devices, vgpu.entry)
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intel_gvt_clean_device(dev_priv);
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intel_gvt_ops = NULL;
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mutex_unlock(&intel_gvt_mutex);
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}
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EXPORT_SYMBOL_NS_GPL(intel_gvt_clear_ops, I915_GVT);
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/**
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* intel_gvt_init - initialize GVT components
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* @dev_priv: drm i915 private data
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@ -177,47 +235,16 @@ static int save_initial_hw_state(struct drm_i915_private *dev_priv)
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*/
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int intel_gvt_init(struct drm_i915_private *dev_priv)
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{
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int ret;
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if (i915_inject_probe_failure(dev_priv))
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return -ENODEV;
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if (!dev_priv->params.enable_gvt) {
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drm_dbg(&dev_priv->drm,
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"GVT-g is disabled by kernel params\n");
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return 0;
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}
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|
||||
if (intel_uc_wants_guc_submission(&to_gt(dev_priv)->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 = save_initial_hw_state(dev_priv);
|
||||
if (ret) {
|
||||
drm_dbg(&dev_priv->drm, "Fail to save initial HW state\n");
|
||||
goto err_save_hw_state;
|
||||
}
|
||||
|
||||
ret = intel_gvt_init_device(dev_priv);
|
||||
if (ret) {
|
||||
drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
|
||||
goto err_init_device;
|
||||
}
|
||||
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);
|
||||
|
||||
return 0;
|
||||
|
||||
err_init_device:
|
||||
free_initial_hw_state(dev_priv);
|
||||
err_save_hw_state:
|
||||
dev_priv->params.enable_gvt = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
|
||||
{
|
||||
return dev_priv->gvt;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -230,11 +257,10 @@ 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);
|
||||
free_initial_hw_state(dev_priv);
|
||||
list_del(&dev_priv->vgpu.entry);
|
||||
mutex_unlock(&intel_gvt_mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -247,6 +273,46 @@ void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
|
|||
*/
|
||||
void intel_gvt_resume(struct drm_i915_private *dev_priv)
|
||||
{
|
||||
if (intel_gvt_active(dev_priv))
|
||||
intel_gvt_pm_resume(dev_priv->gvt);
|
||||
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);
|
||||
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);
|
||||
|
|
|
|||
|
|
@ -39,12 +39,19 @@ struct intel_gvt_mmio_table_iter {
|
|||
|
||||
int intel_gvt_init(struct drm_i915_private *dev_priv);
|
||||
void intel_gvt_driver_remove(struct drm_i915_private *dev_priv);
|
||||
int intel_gvt_init_device(struct drm_i915_private *dev_priv);
|
||||
void intel_gvt_clean_device(struct drm_i915_private *dev_priv);
|
||||
int intel_gvt_init_host(void);
|
||||
void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv);
|
||||
void intel_gvt_resume(struct drm_i915_private *dev_priv);
|
||||
int intel_gvt_iterate_mmio_table(struct intel_gvt_mmio_table_iter *iter);
|
||||
|
||||
struct intel_vgpu_ops {
|
||||
int (*init_device)(struct drm_i915_private *dev_priv);
|
||||
void (*clean_device)(struct drm_i915_private *dev_priv);
|
||||
void (*pm_resume)(struct drm_i915_private *i915);
|
||||
};
|
||||
|
||||
int intel_gvt_set_ops(const struct intel_vgpu_ops *ops);
|
||||
void intel_gvt_clear_ops(const struct intel_vgpu_ops *ops);
|
||||
|
||||
#else
|
||||
static inline int intel_gvt_init(struct drm_i915_private *dev_priv)
|
||||
{
|
||||
|
|
@ -55,10 +62,6 @@ static inline void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
|
|||
{
|
||||
}
|
||||
|
||||
static inline void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void intel_gvt_resume(struct drm_i915_private *dev_priv)
|
||||
{
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1288,3 +1288,4 @@ int intel_gvt_iterate_mmio_table(struct intel_gvt_mmio_table_iter *iter)
|
|||
err:
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_NS_GPL(intel_gvt_iterate_mmio_table, I915_GVT);
|
||||
|
|
|
|||
Loading…
Reference in a new issue