drm/xe/pf: Add SR-IOV GuC Relay PF services

We already have mechanism that allows a VF driver to communicate
with the PF driver, now add PF side handlers for VF2PF requests
defined in version 1.0 of VF/PF GuC Relay ABI specification.

The VF2PF_HANDSHAKE request must be used by the VF driver to
negotiate the ABI version prior to sending any other request.
We will reset any negotiated version later during FLR.

The outcome of the VF2PF_QUERY_RUNTIME requests depends on actual
platform, for legacy platforms used as SDV is provided as-is, for
latest platforms it is preliminary, and might be changed.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240423180436.2089-5-michal.wajdeczko@intel.com

1 files changed, 546 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c
new file mode 100644
index 000000000000..a253f196261d
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c
@@ -0,0 +1,546 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023-2024 Intel Corporation
+ */
+
+#include <drm/drm_managed.h>
+
+#include "abi/guc_actions_sriov_abi.h"
+#include "abi/guc_relay_actions_abi.h"
+
+#include "regs/xe_gt_regs.h"
+#include "regs/xe_guc_regs.h"
+#include "regs/xe_regs.h"
+
+#include "xe_mmio.h"
+#include "xe_gt_sriov_printk.h"
+#include "xe_gt_sriov_pf_helpers.h"
+#include "xe_gt_sriov_pf_service.h"
+#include "xe_gt_sriov_pf_service_types.h"
+#include "xe_guc_ct.h"
+#include "xe_guc_hxg_helpers.h"
+
+static void pf_init_versions(struct xe_gt *gt)
+{
+	BUILD_BUG_ON(!GUC_RELAY_VERSION_BASE_MAJOR && !GUC_RELAY_VERSION_BASE_MINOR);
+	BUILD_BUG_ON(GUC_RELAY_VERSION_BASE_MAJOR > GUC_RELAY_VERSION_LATEST_MAJOR);
+
+	/* base versions may differ between platforms */
+	gt->sriov.pf.service.version.base.major = GUC_RELAY_VERSION_BASE_MAJOR;
+	gt->sriov.pf.service.version.base.minor = GUC_RELAY_VERSION_BASE_MINOR;
+
+	/* latest version is same for all platforms */
+	gt->sriov.pf.service.version.latest.major = GUC_RELAY_VERSION_LATEST_MAJOR;
+	gt->sriov.pf.service.version.latest.minor = GUC_RELAY_VERSION_LATEST_MINOR;
+}
+
+/* Return: 0 on success or a negative error code on failure. */
+static int pf_negotiate_version(struct xe_gt *gt,
+				u32 wanted_major, u32 wanted_minor,
+				u32 *major, u32 *minor)
+{
+	struct xe_gt_sriov_pf_service_version base = gt->sriov.pf.service.version.base;
+	struct xe_gt_sriov_pf_service_version latest = gt->sriov.pf.service.version.latest;
+
+	xe_gt_assert(gt, base.major);
+	xe_gt_assert(gt, base.major <= latest.major);
+	xe_gt_assert(gt, (base.major < latest.major) || (base.minor <= latest.minor));
+
+	/* VF doesn't care - return our latest  */
+	if (wanted_major == VF2PF_HANDSHAKE_MAJOR_ANY &&
+	    wanted_minor == VF2PF_HANDSHAKE_MINOR_ANY) {
+		*major = latest.major;
+		*minor = latest.minor;
+		return 0;
+	}
+
+	/* VF wants newer than our - return our latest  */
+	if (wanted_major > latest.major) {
+		*major = latest.major;
+		*minor = latest.minor;
+		return 0;
+	}
+
+	/* VF wants older than min required - reject */
+	if (wanted_major < base.major ||
+	    (wanted_major == base.major && wanted_minor < base.minor)) {
+		return -EPERM;
+	}
+
+	/* previous major - return wanted, as we should still support it */
+	if (wanted_major < latest.major) {
+		/* XXX: we are not prepared for multi-versions yet */
+		xe_gt_assert(gt, base.major == latest.major);
+		return -ENOPKG;
+	}
+
+	/* same major - return common minor */
+	*major = wanted_major;
+	*minor = min_t(u32, latest.minor, wanted_minor);
+	return 0;
+}
+
+static void pf_connect(struct xe_gt *gt, u32 vfid, u32 major, u32 minor)
+{
+	xe_gt_sriov_pf_assert_vfid(gt, vfid);
+	xe_gt_assert(gt, major || minor);
+
+	gt->sriov.pf.vfs[vfid].version.major = major;
+	gt->sriov.pf.vfs[vfid].version.minor = minor;
+}
+
+static void pf_disconnect(struct xe_gt *gt, u32 vfid)
+{
+	xe_gt_sriov_pf_assert_vfid(gt, vfid);
+
+	gt->sriov.pf.vfs[vfid].version.major = 0;
+	gt->sriov.pf.vfs[vfid].version.minor = 0;
+}
+
+static bool pf_is_negotiated(struct xe_gt *gt, u32 vfid, u32 major, u32 minor)
+{
+	xe_gt_sriov_pf_assert_vfid(gt, vfid);
+
+	return major == gt->sriov.pf.vfs[vfid].version.major &&
+	       minor <= gt->sriov.pf.vfs[vfid].version.minor;
+}
+
+static const struct xe_reg tgl_runtime_regs[] = {
+	RPM_CONFIG0,			/* _MMIO(0x0d00) */
+	MIRROR_FUSE3,			/* _MMIO(0x9118) */
+	XELP_EU_ENABLE,			/* _MMIO(0x9134) */
+	XELP_GT_SLICE_ENABLE,		/* _MMIO(0x9138) */
+	XELP_GT_GEOMETRY_DSS_ENABLE,	/* _MMIO(0x913c) */
+	GT_VEBOX_VDBOX_DISABLE,		/* _MMIO(0x9140) */
+	CTC_MODE,			/* _MMIO(0xa26c) */
+	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
+	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
+};
+
+static const struct xe_reg ats_m_runtime_regs[] = {
+	RPM_CONFIG0,			/* _MMIO(0x0d00) */
+	MIRROR_FUSE3,			/* _MMIO(0x9118) */
+	MIRROR_FUSE1,			/* _MMIO(0x911c) */
+	XELP_EU_ENABLE,			/* _MMIO(0x9134) */
+	XELP_GT_GEOMETRY_DSS_ENABLE,	/* _MMIO(0x913c) */
+	GT_VEBOX_VDBOX_DISABLE,		/* _MMIO(0x9140) */
+	XEHP_GT_COMPUTE_DSS_ENABLE,	/* _MMIO(0x9144) */
+	CTC_MODE,			/* _MMIO(0xa26c) */
+	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
+	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
+};
+
+static const struct xe_reg pvc_runtime_regs[] = {
+	RPM_CONFIG0,			/* _MMIO(0x0d00) */
+	MIRROR_FUSE3,			/* _MMIO(0x9118) */
+	XELP_EU_ENABLE,			/* _MMIO(0x9134) */
+	XELP_GT_GEOMETRY_DSS_ENABLE,	/* _MMIO(0x913c) */
+	GT_VEBOX_VDBOX_DISABLE,		/* _MMIO(0x9140) */
+	XEHP_GT_COMPUTE_DSS_ENABLE,	/* _MMIO(0x9144) */
+	XEHPC_GT_COMPUTE_DSS_ENABLE_EXT,/* _MMIO(0x9148) */
+	CTC_MODE,			/* _MMIO(0xA26C) */
+	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
+	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
+};
+
+static const struct xe_reg ver_1270_runtime_regs[] = {
+	RPM_CONFIG0,			/* _MMIO(0x0d00) */
+	XEHP_FUSE4,			/* _MMIO(0x9114) */
+	MIRROR_FUSE3,			/* _MMIO(0x9118) */
+	MIRROR_FUSE1,			/* _MMIO(0x911c) */
+	XELP_EU_ENABLE,			/* _MMIO(0x9134) */
+	XELP_GT_GEOMETRY_DSS_ENABLE,	/* _MMIO(0x913c) */
+	GT_VEBOX_VDBOX_DISABLE,		/* _MMIO(0x9140) */
+	XEHP_GT_COMPUTE_DSS_ENABLE,	/* _MMIO(0x9144) */
+	XEHPC_GT_COMPUTE_DSS_ENABLE_EXT,/* _MMIO(0x9148) */
+	CTC_MODE,			/* _MMIO(0xa26c) */
+	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
+	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
+};
+
+static const struct xe_reg ver_2000_runtime_regs[] = {
+	RPM_CONFIG0,			/* _MMIO(0x0d00) */
+	XEHP_FUSE4,			/* _MMIO(0x9114) */
+	MIRROR_FUSE3,			/* _MMIO(0x9118) */
+	MIRROR_FUSE1,			/* _MMIO(0x911c) */
+	XELP_EU_ENABLE,			/* _MMIO(0x9134) */
+	XELP_GT_GEOMETRY_DSS_ENABLE,	/* _MMIO(0x913c) */
+	GT_VEBOX_VDBOX_DISABLE,		/* _MMIO(0x9140) */
+	XEHP_GT_COMPUTE_DSS_ENABLE,	/* _MMIO(0x9144) */
+	XEHPC_GT_COMPUTE_DSS_ENABLE_EXT,/* _MMIO(0x9148) */
+	XE2_GT_COMPUTE_DSS_2,		/* _MMIO(0x914c) */
+	XE2_GT_GEOMETRY_DSS_1,		/* _MMIO(0x9150) */
+	XE2_GT_GEOMETRY_DSS_2,		/* _MMIO(0x9154) */
+	CTC_MODE,			/* _MMIO(0xa26c) */
+	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
+	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
+};
+
+static const struct xe_reg *pick_runtime_regs(struct xe_device *xe, unsigned int *count)
+{
+	const struct xe_reg *regs;
+
+	if (GRAPHICS_VERx100(xe) >= 2000) {
+		*count = ARRAY_SIZE(ver_2000_runtime_regs);
+		regs = ver_2000_runtime_regs;
+	} else if (GRAPHICS_VERx100(xe) >= 1270) {
+		*count = ARRAY_SIZE(ver_1270_runtime_regs);
+		regs = ver_1270_runtime_regs;
+	} else if (GRAPHICS_VERx100(xe) == 1260) {
+		*count = ARRAY_SIZE(pvc_runtime_regs);
+		regs = pvc_runtime_regs;
+	} else if (GRAPHICS_VERx100(xe) == 1255) {
+		*count = ARRAY_SIZE(ats_m_runtime_regs);
+		regs = ats_m_runtime_regs;
+	} else if (GRAPHICS_VERx100(xe) == 1200) {
+		*count = ARRAY_SIZE(tgl_runtime_regs);
+		regs = tgl_runtime_regs;
+	} else {
+		regs = ERR_PTR(-ENOPKG);
+		*count = 0;
+	}
+
+	return regs;
+}
+
+static int pf_alloc_runtime_info(struct xe_gt *gt)
+{
+	struct xe_device *xe = gt_to_xe(gt);
+	const struct xe_reg *regs;
+	unsigned int size;
+	u32 *values;
+
+	xe_gt_assert(gt, IS_SRIOV_PF(xe));
+	xe_gt_assert(gt, !gt->sriov.pf.service.runtime.size);
+	xe_gt_assert(gt, !gt->sriov.pf.service.runtime.regs);
+	xe_gt_assert(gt, !gt->sriov.pf.service.runtime.values);
+
+	regs = pick_runtime_regs(xe, &size);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	if (unlikely(!size))
+		return 0;
+
+	values = drmm_kcalloc(&xe->drm, size, sizeof(u32), GFP_KERNEL);
+	if (!values)
+		return -ENOMEM;
+
+	gt->sriov.pf.service.runtime.size = size;
+	gt->sriov.pf.service.runtime.regs = regs;
+	gt->sriov.pf.service.runtime.values = values;
+
+	return 0;
+}
+
+static void read_many(struct xe_gt *gt, unsigned int count,
+		      const struct xe_reg *regs, u32 *values)
+{
+	while (count--)
+		*values++ = xe_mmio_read32(gt, *regs++);
+}
+
+static void pf_prepare_runtime_info(struct xe_gt *gt)
+{
+	const struct xe_reg *regs;
+	unsigned int size;
+	u32 *values;
+
+	if (!gt->sriov.pf.service.runtime.size)
+		return;
+
+	size = gt->sriov.pf.service.runtime.size;
+	regs = gt->sriov.pf.service.runtime.regs;
+	values = gt->sriov.pf.service.runtime.values;
+
+	read_many(gt, size, regs, values);
+
+	if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV)) {
+		struct drm_printer p = xe_gt_info_printer(gt);
+
+		xe_gt_sriov_pf_service_print_runtime(gt, &p);
+	}
+}
+
+/**
+ * xe_gt_sriov_pf_service_init - Early initialization of the GT SR-IOV PF services.
+ * @gt: the &xe_gt to initialize
+ *
+ * Performs early initialization of the GT SR-IOV PF services, including preparation
+ * of the runtime info that will be shared with VFs.
+ *
+ * This function can only be called on PF.
+ */
+int xe_gt_sriov_pf_service_init(struct xe_gt *gt)
+{
+	int err;
+
+	pf_init_versions(gt);
+
+	err = pf_alloc_runtime_info(gt);
+	if (unlikely(err))
+		goto failed;
+
+	return 0;
+failed:
+	xe_gt_sriov_err(gt, "Failed to initialize service (%pe)\n", ERR_PTR(err));
+	return err;
+}
+
+/**
+ * xe_gt_sriov_pf_service_update - Update PF SR-IOV services.
+ * @gt: the &xe_gt to update
+ *
+ * Updates runtime data shared with VFs.
+ *
+ * This function can be called more than once.
+ * This function can only be called on PF.
+ */
+void xe_gt_sriov_pf_service_update(struct xe_gt *gt)
+{
+	pf_prepare_runtime_info(gt);
+}
+
+/**
+ * xe_gt_sriov_pf_service_reset - Reset a connection with the VF.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier
+ *
+ * Reset a VF driver negotiated VF/PF ABI version.
+ * After that point, the VF driver will have to perform new version handshake
+ * to continue use of the PF services again.
+ *
+ * This function can only be called on PF.
+ */
+void xe_gt_sriov_pf_service_reset(struct xe_gt *gt, unsigned int vfid)
+{
+	pf_disconnect(gt, vfid);
+}
+
+/* Return: 0 on success or a negative error code on failure. */
+static int pf_process_handshake(struct xe_gt *gt, u32 vfid,
+				u32 wanted_major, u32 wanted_minor,
+				u32 *major, u32 *minor)
+{
+	int err;
+
+	xe_gt_sriov_dbg_verbose(gt, "VF%u wants ABI version %u.%u\n",
+				vfid, wanted_major, wanted_minor);
+
+	err = pf_negotiate_version(gt, wanted_major, wanted_minor, major, minor);
+
+	if (err < 0) {
+		xe_gt_sriov_notice(gt, "VF%u failed to negotiate ABI %u.%u (%pe)\n",
+				   vfid, wanted_major, wanted_minor, ERR_PTR(err));
+		pf_disconnect(gt, vfid);
+	} else {
+		xe_gt_sriov_dbg(gt, "VF%u negotiated ABI version %u.%u\n",
+				vfid, *major, *minor);
+		pf_connect(gt, vfid, *major, *minor);
+	}
+
+	return 0;
+}
+
+/* Return: length of the response message or a negative error code on failure. */
+static int pf_process_handshake_msg(struct xe_gt *gt, u32 origin,
+				    const u32 *request, u32 len, u32 *response, u32 size)
+{
+	u32 wanted_major, wanted_minor;
+	u32 major, minor;
+	u32 mbz;
+	int err;
+
+	if (unlikely(len != VF2PF_HANDSHAKE_REQUEST_MSG_LEN))
+		return -EMSGSIZE;
+
+	mbz = FIELD_GET(VF2PF_HANDSHAKE_REQUEST_MSG_0_MBZ, request[0]);
+	if (unlikely(mbz))
+		return -EPFNOSUPPORT;
+
+	wanted_major = FIELD_GET(VF2PF_HANDSHAKE_REQUEST_MSG_1_MAJOR, request[1]);
+	wanted_minor = FIELD_GET(VF2PF_HANDSHAKE_REQUEST_MSG_1_MINOR, request[1]);
+
+	err = pf_process_handshake(gt, origin, wanted_major, wanted_minor, &major, &minor);
+	if (err < 0)
+		return err;
+
+	xe_gt_assert(gt, major || minor);
+	xe_gt_assert(gt, size >= VF2PF_HANDSHAKE_RESPONSE_MSG_LEN);
+
+	response[0] = FIELD_PREP(GUC_HXG_MSG_0_ORIGIN, GUC_HXG_ORIGIN_HOST) |
+		      FIELD_PREP(GUC_HXG_MSG_0_TYPE, GUC_HXG_TYPE_RESPONSE_SUCCESS) |
+		      FIELD_PREP(GUC_HXG_RESPONSE_MSG_0_DATA0, 0);
+	response[1] = FIELD_PREP(VF2PF_HANDSHAKE_RESPONSE_MSG_1_MAJOR, major) |
+		      FIELD_PREP(VF2PF_HANDSHAKE_RESPONSE_MSG_1_MINOR, minor);
+
+	return VF2PF_HANDSHAKE_RESPONSE_MSG_LEN;
+}
+
+struct reg_data {
+	u32 offset;
+	u32 value;
+} __packed;
+static_assert(hxg_sizeof(struct reg_data) == 2);
+
+/* Return: number of entries copied or negative error code on failure. */
+static int pf_service_runtime_query(struct xe_gt *gt, u32 start, u32 limit,
+				    struct reg_data *data, u32 *remaining)
+{
+	struct xe_gt_sriov_pf_service_runtime_regs *runtime;
+	unsigned int count, i;
+	u32 addr;
+
+	xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
+
+	runtime = &gt->sriov.pf.service.runtime;
+
+	if (start > runtime->size)
+		return -ERANGE;
+
+	count = min_t(u32, runtime->size - start, limit);
+
+	for (i = 0; i < count; ++i, ++data) {
+		addr = runtime->regs[start + i].addr;
+		data->offset = xe_mmio_adjusted_addr(gt, addr);
+		data->value = runtime->values[start + i];
+	}
+
+	*remaining = runtime->size - start - count;
+	return count;
+}
+
+/* Return: length of the response message or a negative error code on failure. */
+static int pf_process_runtime_query_msg(struct xe_gt *gt, u32 origin,
+					const u32 *msg, u32 msg_len, u32 *response, u32 resp_size)
+{
+	const u32 chunk_size = hxg_sizeof(struct reg_data);
+	struct reg_data *reg_data_buf;
+	u32 limit, start, max_chunks;
+	u32 remaining = 0;
+	int ret;
+
+	if (!pf_is_negotiated(gt, origin, 1, 0))
+		return -EACCES;
+	if (unlikely(msg_len > VF2PF_QUERY_RUNTIME_REQUEST_MSG_LEN))
+		return -EMSGSIZE;
+	if (unlikely(msg_len < VF2PF_QUERY_RUNTIME_REQUEST_MSG_LEN))
+		return -EPROTO;
+	if (unlikely(resp_size < VF2PF_QUERY_RUNTIME_RESPONSE_MSG_MIN_LEN))
+		return -EINVAL;
+
+	limit = FIELD_GET(VF2PF_QUERY_RUNTIME_REQUEST_MSG_0_LIMIT, msg[0]);
+	start = FIELD_GET(VF2PF_QUERY_RUNTIME_REQUEST_MSG_1_START, msg[1]);
+
+	resp_size = min_t(u32, resp_size, VF2PF_QUERY_RUNTIME_RESPONSE_MSG_MAX_LEN);
+	max_chunks = (resp_size - VF2PF_QUERY_RUNTIME_RESPONSE_MSG_MIN_LEN) / chunk_size;
+	limit = limit == VF2PF_QUERY_RUNTIME_NO_LIMIT ? max_chunks : min_t(u32, max_chunks, limit);
+	reg_data_buf = (void *)(response + VF2PF_QUERY_RUNTIME_RESPONSE_MSG_MIN_LEN);
+
+	ret = pf_service_runtime_query(gt, start, limit, reg_data_buf, &remaining);
+	if (ret < 0)
+		return ret;
+
+	response[0] = FIELD_PREP(GUC_HXG_MSG_0_ORIGIN, GUC_HXG_ORIGIN_HOST) |
+		      FIELD_PREP(GUC_HXG_MSG_0_TYPE, GUC_HXG_TYPE_RESPONSE_SUCCESS) |
+		      FIELD_PREP(VF2PF_QUERY_RUNTIME_RESPONSE_MSG_0_COUNT, ret);
+	response[1] = FIELD_PREP(VF2PF_QUERY_RUNTIME_RESPONSE_MSG_1_REMAINING, remaining);
+
+	return VF2PF_QUERY_RUNTIME_RESPONSE_MSG_MIN_LEN + ret * hxg_sizeof(struct reg_data);
+}
+
+/**
+ * xe_gt_sriov_pf_service_process_request - Service GT level SR-IOV request message from the VF.
+ * @gt: the &xe_gt that provides the service
+ * @origin: VF number that is requesting the service
+ * @msg: request message
+ * @msg_len: length of the request message (in dwords)
+ * @response: placeholder for the response message
+ * @resp_size: length of the response message buffer (in dwords)
+ *
+ * This function processes `Relay Message`_ request from the VF.
+ *
+ * Return: length of the response message or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_service_process_request(struct xe_gt *gt, u32 origin,
+					   const u32 *msg, u32 msg_len,
+					   u32 *response, u32 resp_size)
+{
+	u32 action, data __maybe_unused;
+	int ret;
+
+	xe_gt_assert(gt, msg_len >= GUC_HXG_MSG_MIN_LEN);
+	xe_gt_assert(gt, FIELD_GET(GUC_HXG_MSG_0_TYPE, msg[0]) == GUC_HXG_TYPE_REQUEST);
+
+	action = FIELD_GET(GUC_HXG_REQUEST_MSG_0_ACTION, msg[0]);
+	data = FIELD_GET(GUC_HXG_REQUEST_MSG_0_DATA0, msg[0]);
+	xe_gt_sriov_dbg_verbose(gt, "service action %#x:%u from VF%u\n",
+				action, data, origin);
+
+	switch (action) {
+	case GUC_RELAY_ACTION_VF2PF_HANDSHAKE:
+		ret = pf_process_handshake_msg(gt, origin, msg, msg_len, response, resp_size);
+		break;
+	case GUC_RELAY_ACTION_VF2PF_QUERY_RUNTIME:
+		ret = pf_process_runtime_query_msg(gt, origin, msg, msg_len, response, resp_size);
+		break;
+	default:
+		ret = -EOPNOTSUPP;
+		break;
+	}
+
+	return ret;
+}
+
+/**
+ * xe_gt_sriov_pf_service_print_runtime - Print PF runtime data shared with VFs.
+ * @gt: the &xe_gt
+ * @p: the &drm_printer
+ *
+ * This function is for PF use only.
+ */
+int xe_gt_sriov_pf_service_print_runtime(struct xe_gt *gt, struct drm_printer *p)
+{
+	const struct xe_reg *regs;
+	unsigned int size;
+	u32 *values;
+
+	xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
+
+	size = gt->sriov.pf.service.runtime.size;
+	regs = gt->sriov.pf.service.runtime.regs;
+	values = gt->sriov.pf.service.runtime.values;
+
+	for (; size--; regs++, values++) {
+		drm_printf(p, "reg[%#x] = %#x\n",
+			   xe_mmio_adjusted_addr(gt, regs->addr), *values);
+	}
+
+	return 0;
+}
+
+/**
+ * xe_gt_sriov_pf_service_print_version - Print ABI versions negotiated with VFs.
+ * @gt: the &xe_gt
+ * @p: the &drm_printer
+ *
+ * This function is for PF use only.
+ */
+int xe_gt_sriov_pf_service_print_version(struct xe_gt *gt, struct drm_printer *p)
+{
+	struct xe_device *xe = gt_to_xe(gt);
+	unsigned int n, total_vfs = xe_sriov_pf_get_totalvfs(xe);
+	struct xe_gt_sriov_pf_service_version *version;
+
+	xe_gt_assert(gt, IS_SRIOV_PF(xe));
+
+	for (n = 1; n <= total_vfs; n++) {
+		version = &gt->sriov.pf.vfs[n].version;
+		if (!version->major && !version->minor)
+			continue;
+
+		drm_printf(p, "VF%u:\t%u.%u\n", n, version->major, version->minor);
+	}
+
+	return 0;
+}