/**
* intel_vgpu_emulate_opregion_request - emulating OpRegion request
* @vgpu: a vGPU
* @swsci: SWSCI request
*
* Returns:
* Zero on success, negative error code if failed
*/
int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
{
u32 *scic, *parm;
u32 func, subfunc;
scic = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC;
parm = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM;
if (!(swsci & SWSCI_SCI_SELECT)) {
gvt_vgpu_err("requesting SMI service\n");
return 0;
}
/* ignore non 0->1 trasitions */
if ((vgpu_cfg_space(vgpu)[INTEL_GVT_PCI_SWSCI]
& SWSCI_SCI_TRIGGER) ||
!(swsci & SWSCI_SCI_TRIGGER)) {
return 0;
}
func = GVT_OPREGION_FUNC(*scic);
subfunc = GVT_OPREGION_SUBFUNC(*scic);
if (!querying_capabilities(*scic)) {
gvt_vgpu_err("requesting runtime service: func \"%s\","
" subfunc \"%s\"\n",
opregion_func_name(func),
opregion_subfunc_name(subfunc));
/*
* emulate exit status of function call, '0' means
* "failure, generic, unsupported or unknown cause"
*/
*scic &= ~OPREGION_SCIC_EXIT_MASK;
return 0;
}
*scic = 0;
*parm = 0;
return 0;
}
/**
* intel_vgpu_gpa_to_mmio_offset - translate a GPA to MMIO offset
* @vgpu: a vGPU
*
* Returns:
* Zero on success, negative error code if failed
*/
int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa)
{
u64 gttmmio_gpa = *(u64 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0) &
~GENMASK(3, 0);
return gpa - gttmmio_gpa;
}
