// SPDX-License-Identifier: MIT /* * Copyright © 2023 Intel Corporation */ #include "xe_assert.h" #include "xe_sriov.h" /** * xe_sriov_mode_to_string - Convert enum value to string. * @mode: the &xe_sriov_mode to convert * * Returns: SR-IOV mode as a user friendly string. */ const char *xe_sriov_mode_to_string(enum xe_sriov_mode mode) { switch (mode) { case XE_SRIOV_MODE_NONE: return "none"; case XE_SRIOV_MODE_PF: return "SR-IOV PF"; case XE_SRIOV_MODE_VF: return "SR-IOV VF"; default: return "<invalid>"; } } /** * xe_sriov_probe_early - Probe a SR-IOV mode. * @xe: the &xe_device to probe mode on * @has_sriov: flag indicating hardware support for SR-IOV * * This function should be called only once and as soon as possible during * driver probe to detect whether we are running a SR-IOV Physical Function * (PF) or a Virtual Function (VF) device. * * SR-IOV PF mode detection is based on PCI @dev_is_pf() function. * SR-IOV VF mode detection is based on dedicated MMIO register read. */ void xe_sriov_probe_early(struct xe_device *xe, bool has_sriov) { enum xe_sriov_mode mode = XE_SRIOV_MODE_NONE; /* TODO: replace with proper mode detection */ xe_assert(xe, !has_sriov); xe_assert(xe, !xe->sriov.__mode); xe->sriov.__mode = mode; xe_assert(xe, xe->sriov.__mode); if (has_sriov) drm_info(&xe->drm, "Running in %s mode\n", xe_sriov_mode_to_string(xe_device_sriov_mode(xe))); }