diff options
author | Colin Xu <colin.xu@intel.com> | 2020-10-27 12:53:08 +0800 |
---|---|---|
committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2020-11-10 14:37:56 +0800 |
commit | 5f60b12edcd0c2e83650a6f9aa4a969bd9fc5732 (patch) | |
tree | f87c149720eb757ae657fd24f469e66152a5bd5a /drivers/gpu/drm/i915/gvt/gvt.c | |
parent | 6594094f819e0020e926e137e47e2edb97ba500b (diff) |
drm/i915/gvt: Save/restore HW status to support GVT suspend/resume
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
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/gvt.c')
-rw-r--r-- | drivers/gpu/drm/i915/gvt/gvt.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c index c7c561237883..495b6afd6571 100644 --- a/drivers/gpu/drm/i915/gvt/gvt.c +++ b/drivers/gpu/drm/i915/gvt/gvt.c @@ -406,6 +406,15 @@ out_clean_idr: } int +intel_gvt_pm_resume(struct intel_gvt *gvt) +{ + intel_gvt_restore_fence(gvt); + intel_gvt_restore_mmio(gvt); + intel_gvt_restore_ggtt(gvt); + return 0; +} + +int intel_gvt_register_hypervisor(struct intel_gvt_mpt *m) { int ret; |