diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_sriov.c')
-rw-r--r-- | drivers/gpu/drm/xe/xe_sriov.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_sriov.c b/drivers/gpu/drm/xe/xe_sriov.c new file mode 100644 index 0000000000..42a0e0c917 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_sriov.c @@ -0,0 +1,55 @@ +// 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))); +} |