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// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2015 - 2020 Intel Corporation */
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_pf2vf_msg.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)
{
u32 msg = (ADF_VF2PF_MSGORIGIN_SYSTEM |
(ADF_VF2PF_MSGTYPE_INIT << ADF_VF2PF_MSGTYPE_SHIFT));
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)
{
u32 msg = (ADF_VF2PF_MSGORIGIN_SYSTEM |
(ADF_VF2PF_MSGTYPE_SHUTDOWN << ADF_VF2PF_MSGTYPE_SHIFT));
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);
static bool adf_handle_pf2vf_msg(struct adf_accel_dev *accel_dev, u32 msg)
{
switch ((msg & ADF_PF2VF_MSGTYPE_MASK) >> ADF_PF2VF_MSGTYPE_SHIFT) {
case ADF_PF2VF_MSGTYPE_RESTARTING:
dev_dbg(&GET_DEV(accel_dev),
"Restarting msg received from PF 0x%x\n", msg);
adf_pf2vf_handle_pf_restarting(accel_dev);
return false;
case ADF_PF2VF_MSGTYPE_VERSION_RESP:
dev_dbg(&GET_DEV(accel_dev),
"Version resp received from PF 0x%x\n", msg);
accel_dev->vf.pf_version =
(msg & ADF_PF2VF_VERSION_RESP_VERS_MASK) >>
ADF_PF2VF_VERSION_RESP_VERS_SHIFT;
accel_dev->vf.compatible =
(msg & ADF_PF2VF_VERSION_RESP_RESULT_MASK) >>
ADF_PF2VF_VERSION_RESP_RESULT_SHIFT;
complete(&accel_dev->vf.iov_msg_completion);
return true;
default:
dev_err(&GET_DEV(accel_dev),
"Unknown PF2VF message(0x%x)\n", msg);
}
return false;
}
bool adf_recv_and_handle_pf2vf_msg(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
struct adf_bar *pmisc =
&GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
void __iomem *pmisc_bar_addr = pmisc->virt_addr;
u32 offset = hw_data->get_pf2vf_offset(0);
u32 msg;
/* Read the message from PF */
msg = ADF_CSR_RD(pmisc_bar_addr, offset);
if (!(msg & ADF_PF2VF_INT)) {
dev_info(&GET_DEV(accel_dev),
"Spurious PF2VF interrupt, msg %X. Ignored\n", msg);
return true;
}
if (!(msg & ADF_PF2VF_MSGORIGIN_SYSTEM))
/* Ignore legacy non-system (non-kernel) PF2VF messages */
return true;
/* To ack, clear the PF2VFINT bit */
msg &= ~ADF_PF2VF_INT;
ADF_CSR_WR(pmisc_bar_addr, offset, msg);
return adf_handle_pf2vf_msg(accel_dev, msg);
}
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