mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-23 05:56:14 -04:00
bd59b769dd
Refactor the receive and handle logic to separate the parsing and handling of the PFVF message from the initial retrieval and ACK. This is to allow the intoduction of the recv function in a subsequent patch. Signed-off-by: Marco Chiappero <marco.chiappero@intel.com> Co-developed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
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/* Copyright(c) 2015 - 2020 Intel Corporation */
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#include "adf_accel_devices.h"
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#include "adf_common_drv.h"
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#include "adf_pf2vf_msg.h"
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/**
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* adf_vf2pf_notify_init() - send init msg to PF
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* @accel_dev: Pointer to acceleration VF device.
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*
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* Function sends an init message from the VF to a PF
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*
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* Return: 0 on success, error code otherwise.
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*/
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int adf_vf2pf_notify_init(struct adf_accel_dev *accel_dev)
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{
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u32 msg = (ADF_VF2PF_MSGORIGIN_SYSTEM |
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(ADF_VF2PF_MSGTYPE_INIT << ADF_VF2PF_MSGTYPE_SHIFT));
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if (adf_send_vf2pf_msg(accel_dev, msg)) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to send Init event to PF\n");
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return -EFAULT;
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}
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set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_vf2pf_notify_init);
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/**
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* adf_vf2pf_notify_shutdown() - send shutdown msg to PF
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* @accel_dev: Pointer to acceleration VF device.
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*
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* Function sends a shutdown message from the VF to a PF
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*
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* Return: void
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*/
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void adf_vf2pf_notify_shutdown(struct adf_accel_dev *accel_dev)
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{
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u32 msg = (ADF_VF2PF_MSGORIGIN_SYSTEM |
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(ADF_VF2PF_MSGTYPE_SHUTDOWN << ADF_VF2PF_MSGTYPE_SHIFT));
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if (test_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status))
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if (adf_send_vf2pf_msg(accel_dev, msg))
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dev_err(&GET_DEV(accel_dev),
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"Failed to send Shutdown event to PF\n");
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}
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EXPORT_SYMBOL_GPL(adf_vf2pf_notify_shutdown);
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static bool adf_handle_pf2vf_msg(struct adf_accel_dev *accel_dev, u32 msg)
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{
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switch ((msg & ADF_PF2VF_MSGTYPE_MASK) >> ADF_PF2VF_MSGTYPE_SHIFT) {
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case ADF_PF2VF_MSGTYPE_RESTARTING:
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dev_dbg(&GET_DEV(accel_dev),
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"Restarting msg received from PF 0x%x\n", msg);
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adf_pf2vf_handle_pf_restarting(accel_dev);
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return false;
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case ADF_PF2VF_MSGTYPE_VERSION_RESP:
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dev_dbg(&GET_DEV(accel_dev),
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"Version resp received from PF 0x%x\n", msg);
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accel_dev->vf.pf_version =
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(msg & ADF_PF2VF_VERSION_RESP_VERS_MASK) >>
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ADF_PF2VF_VERSION_RESP_VERS_SHIFT;
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accel_dev->vf.compatible =
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(msg & ADF_PF2VF_VERSION_RESP_RESULT_MASK) >>
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ADF_PF2VF_VERSION_RESP_RESULT_SHIFT;
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complete(&accel_dev->vf.iov_msg_completion);
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return true;
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default:
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dev_err(&GET_DEV(accel_dev),
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"Unknown PF2VF message(0x%x)\n", msg);
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}
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return false;
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}
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bool adf_recv_and_handle_pf2vf_msg(struct adf_accel_dev *accel_dev)
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{
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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struct adf_bar *pmisc =
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&GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
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void __iomem *pmisc_bar_addr = pmisc->virt_addr;
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u32 offset = hw_data->get_pf2vf_offset(0);
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u32 msg;
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/* Read the message from PF */
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msg = ADF_CSR_RD(pmisc_bar_addr, offset);
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if (!(msg & ADF_PF2VF_INT)) {
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dev_info(&GET_DEV(accel_dev),
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"Spurious PF2VF interrupt, msg %X. Ignored\n", msg);
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return true;
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}
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if (!(msg & ADF_PF2VF_MSGORIGIN_SYSTEM))
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/* Ignore legacy non-system (non-kernel) PF2VF messages */
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return true;
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/* To ack, clear the PF2VFINT bit */
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msg &= ~ADF_PF2VF_INT;
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ADF_CSR_WR(pmisc_bar_addr, offset, msg);
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return adf_handle_pf2vf_msg(accel_dev, msg);
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}
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