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Commit 97d58f7d authored by Changbin Du's avatar Changbin Du Committed by Zhenyu Wang
Browse files

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: default avatarChangbin Du <changbin.du@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent cdcc4347

drivers/gpu/drm/i915/gvt/mmio.c

+25 −14
Original line number Diff line number Diff line
@@ -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.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;

	vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size;



	/* 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;

}

drivers/gpu/drm/i915/gvt/mmio.h

+1 −0
Original line number Diff line number Diff line
@@ -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);