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drm/i915/gvt: introduce intel_vgpu_reset_mmio() to reset mmio space 

This patch introduces a new function intel_vgpu_reset_mmio() to
reset vGPU MMIO space (virtual registers of the vGPU). The default
values are loaded as firmware during gvt inititiation.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Changbin Du 2017-01-13 11:16:01 +08:00 committed by Zhenyu Wang
parent cdcc43479c
commit 97d58f7dd0
2 changed files with 26 additions and 14 deletions
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39
drivers/gpu/drm/i915/gvt/mmio.c
View File

@ -304,6 +304,26 @@ int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, uint64_t pa,
return ret;
}
/**
* intel_vgpu_reset_mmio - reset virtual MMIO space
* @vgpu: a vGPU
*
*/
void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu)
{
struct intel_gvt *gvt = vgpu->gvt;
const struct intel_gvt_device_info *info = &gvt->device_info;
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;
}
/**
* intel_vgpu_init_mmio - init MMIO space
* @vgpu: a vGPU
@ -315,22 +335,13 @@ int intel_vgpu_init_mmio(struct intel_vgpu *vgpu)
{
const struct intel_gvt_device_info *info = &vgpu->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.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, vgpu->gvt->firmware.mmio, info->mmio_size);
memcpy(vgpu->mmio.sreg, vgpu->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;
intel_vgpu_reset_mmio(vgpu);
return 0;
}

1
drivers/gpu/drm/i915/gvt/mmio.h
View File

@ -87,6 +87,7 @@ struct intel_gvt_mmio_info *intel_gvt_find_mmio_info(struct intel_gvt *gvt,
})
int intel_vgpu_init_mmio(struct intel_vgpu *vgpu);
void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu);
void intel_vgpu_clean_mmio(struct intel_vgpu *vgpu);
int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa);