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// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2015 - 2021 Intel Corporation */
#include <linux/bitfield.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_pfvf_msg.h"
#include "adf_pfvf_vf_msg.h"
#include "adf_pfvf_vf_proto.h"
/**
* adf_vf2pf_notify_init() - send init msg to PF
* @accel_dev: Pointer to acceleration VF device.
*
* Function sends an init message from the VF to a PF
*
* Return: 0 on success, error code otherwise.
*/
int adf_vf2pf_notify_init(struct adf_accel_dev *accel_dev)
{
struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_INIT };
if (adf_send_vf2pf_msg(accel_dev, msg)) {
dev_err(&GET_DEV(accel_dev),
"Failed to send Init event to PF\n");
return -EFAULT;
}
set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
return 0;
}
EXPORT_SYMBOL_GPL(adf_vf2pf_notify_init);
/**
* adf_vf2pf_notify_shutdown() - send shutdown msg to PF
* @accel_dev: Pointer to acceleration VF device.
*
* Function sends a shutdown message from the VF to a PF
*
* Return: void
*/
void adf_vf2pf_notify_shutdown(struct adf_accel_dev *accel_dev)
{
struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_SHUTDOWN };
if (test_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status))
if (adf_send_vf2pf_msg(accel_dev, msg))
dev_err(&GET_DEV(accel_dev),
"Failed to send Shutdown event to PF\n");
}
EXPORT_SYMBOL_GPL(adf_vf2pf_notify_shutdown);
int adf_vf2pf_request_version(struct adf_accel_dev *accel_dev)
{
u8 pf_version;
int compat;
int ret;
struct pfvf_message resp;
struct pfvf_message msg = {
.type = ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ,
.data = ADF_PFVF_COMPAT_THIS_VERSION,
};
BUILD_BUG_ON(ADF_PFVF_COMPAT_THIS_VERSION > 255);
ret = adf_send_vf2pf_req(accel_dev, msg, &resp);
if (ret) {
dev_err(&GET_DEV(accel_dev),
"Failed to send Compatibility Version Request.\n");
return ret;
}
pf_version = FIELD_GET(ADF_PF2VF_VERSION_RESP_VERS_MASK, resp.data);
compat = FIELD_GET(ADF_PF2VF_VERSION_RESP_RESULT_MASK, resp.data);
/* Response from PF received, check compatibility */
switch (compat) {
case ADF_PF2VF_VF_COMPATIBLE:
break;
case ADF_PF2VF_VF_COMPAT_UNKNOWN:
/* VF is newer than PF - compatible for now */
break;
case ADF_PF2VF_VF_INCOMPATIBLE:
dev_err(&GET_DEV(accel_dev),
"PF (vers %d) and VF (vers %d) are not compatible\n",
pf_version, ADF_PFVF_COMPAT_THIS_VERSION);
return -EINVAL;
default:
dev_err(&GET_DEV(accel_dev),
"Invalid response from PF; assume not compatible\n");
return -EINVAL;
}
accel_dev->vf.pf_compat_ver = pf_version;
return 0;
}
int adf_vf2pf_get_capabilities(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
struct capabilities_v3 cap_msg = { { 0 }, };
unsigned int len = sizeof(cap_msg);
if (accel_dev->vf.pf_compat_ver < ADF_PFVF_COMPAT_CAPABILITIES)
/* The PF is too old to support the extended capabilities */
return 0;
if (adf_send_vf2pf_blkmsg_req(accel_dev, ADF_VF2PF_BLKMSG_REQ_CAP_SUMMARY,
(u8 *)&cap_msg, &len)) {
dev_err(&GET_DEV(accel_dev),
"QAT: Failed to get block message response\n");
return -EFAULT;
}
switch (cap_msg.hdr.version) {
default:
/* Newer version received, handle only the know parts */
fallthrough;
case ADF_PFVF_CAPABILITIES_V3_VERSION:
if (likely(len >= sizeof(struct capabilities_v3)))
hw_data->clock_frequency = cap_msg.frequency;
else
dev_info(&GET_DEV(accel_dev), "Could not get frequency");
fallthrough;
case ADF_PFVF_CAPABILITIES_V2_VERSION:
if (likely(len >= sizeof(struct capabilities_v2)))
hw_data->accel_capabilities_mask = cap_msg.capabilities;
else
dev_info(&GET_DEV(accel_dev), "Could not get capabilities");
fallthrough;
case ADF_PFVF_CAPABILITIES_V1_VERSION:
if (likely(len >= sizeof(struct capabilities_v1))) {
hw_data->extended_dc_capabilities = cap_msg.ext_dc_caps;
} else {
dev_err(&GET_DEV(accel_dev),
"Capabilities message truncated to %d bytes\n", len);
return -EFAULT;
}
}
return 0;
}
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