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5f60b12edc
This patch save/restore necessary GVT info during i915 suspend/resume so that GVT enabled QEMU VM can continue running. Only GGTT and fence regs are saved/restored now. GVT will save GGTT entries on each host_entry update, restore the saved dirty entries and re-init fence regs in resume routine. V2: - Change kzalloc/kfree to vzalloc/vfree since the space allocated from kmalloc may not enough for all saved GGTT entries. - Keep gvt suspend/resume wrapper in intel_gvt.h/intel_gvt.c and move the actual implementation to gvt.h/gvt.c. (zhenyu) - Check gvt config on and active with intel_gvt_active(). (zhenyu) V3: (zhenyu) - Incorrect copy length. Should be num entries * entry size. - Use memcpy_toio()/memcpy_fromio() instead of memcpy for iomem. - Add F_PM_SAVE flags to indicate which MMIOs to save/restore for PM. V4: Rebase. V5: Fail intel_gvt_save_ggtt as -ENOMEM if fail to alloc memory to save ggtt. Free allocated ggtt_entries on failure. V6: Save host entry to per-vGPU gtt.ggtt_mm on each host_entry update. V7: Restore GGTT entry based on present bit. Split fence restore and mmio restore in different functions. Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com> Signed-off-by: Colin Xu <colin.xu@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20201027045308.158955-1-colin.xu@intel.com
56 lines
2 KiB
C
56 lines
2 KiB
C
/*
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* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _INTEL_GVT_H_
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#define _INTEL_GVT_H_
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struct drm_i915_private;
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#ifdef CONFIG_DRM_I915_GVT
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int intel_gvt_init(struct drm_i915_private *dev_priv);
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void intel_gvt_driver_remove(struct drm_i915_private *dev_priv);
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int intel_gvt_init_device(struct drm_i915_private *dev_priv);
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void intel_gvt_clean_device(struct drm_i915_private *dev_priv);
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int intel_gvt_init_host(void);
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void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv);
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void intel_gvt_resume(struct drm_i915_private *dev_priv);
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#else
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static inline int intel_gvt_init(struct drm_i915_private *dev_priv)
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{
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return 0;
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}
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static inline void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
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{
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}
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static inline void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
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{
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}
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static inline void intel_gvt_resume(struct drm_i915_private *dev_priv)
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{
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}
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#endif
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#endif /* _INTEL_GVT_H_ */
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