diff options
Diffstat (limited to 'drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c')
| -rw-r--r-- | drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c b/drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c new file mode 100644 index 000000000000..ac6a54cf17f6 --- /dev/null +++ b/drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) +/* Copyright(c) 2015 - 2021 Intel Corporation */ +#include <linux/spinlock.h> +#include <linux/types.h> +#include "adf_accel_devices.h" +#include "adf_common_drv.h" +#include "adf_pfvf_msg.h" +#include "adf_pfvf_pf_proto.h" + +/** + * adf_send_pf2vf_msg() - send PF to VF message + * @accel_dev: Pointer to acceleration device + * @vf_nr: VF number to which the message will be sent + * @msg: Message to send + * + * This function allows the PF to send a message to a specific VF. + * + * Return: 0 on success, error code otherwise. + */ +int adf_send_pf2vf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr, u32 msg) +{ + return GET_PFVF_OPS(accel_dev)->send_msg(accel_dev, msg, vf_nr); +} + +/** + * adf_recv_vf2pf_msg() - receive a VF to PF message + * @accel_dev: Pointer to acceleration device + * @vf_nr: Number of the VF from where the message will be received + * + * This function allows the PF to receive a message from a specific VF. + * + * Return: a valid message on success, zero otherwise. + */ +static u32 adf_recv_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr) +{ + return GET_PFVF_OPS(accel_dev)->recv_msg(accel_dev, vf_nr); +} + +static int adf_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u32 vf_nr, + u32 msg, u32 *response) +{ + struct adf_accel_vf_info *vf_info = &accel_dev->pf.vf_info[vf_nr]; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + u32 resp = 0; + + switch ((msg & ADF_VF2PF_MSGTYPE_MASK) >> ADF_VF2PF_MSGTYPE_SHIFT) { + case ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ: + { + u8 vf_compat_ver = msg >> ADF_VF2PF_COMPAT_VER_REQ_SHIFT; + + resp = (ADF_PF2VF_MSGORIGIN_SYSTEM | + (ADF_PF2VF_MSGTYPE_VERSION_RESP << + ADF_PF2VF_MSGTYPE_SHIFT) | + (ADF_PFVF_COMPAT_THIS_VERSION << + ADF_PF2VF_VERSION_RESP_VERS_SHIFT)); + + dev_dbg(&GET_DEV(accel_dev), + "Compatibility Version Request from VF%d vers=%u\n", + vf_nr + 1, vf_compat_ver); + + if (vf_compat_ver < hw_data->min_iov_compat_ver) { + dev_err(&GET_DEV(accel_dev), + "VF (vers %d) incompatible with PF (vers %d)\n", + vf_compat_ver, ADF_PFVF_COMPAT_THIS_VERSION); + resp |= ADF_PF2VF_VF_INCOMPATIBLE << + ADF_PF2VF_VERSION_RESP_RESULT_SHIFT; + } else if (vf_compat_ver > ADF_PFVF_COMPAT_THIS_VERSION) { + dev_err(&GET_DEV(accel_dev), + "VF (vers %d) compat with PF (vers %d) unkn.\n", + vf_compat_ver, ADF_PFVF_COMPAT_THIS_VERSION); + resp |= ADF_PF2VF_VF_COMPAT_UNKNOWN << + ADF_PF2VF_VERSION_RESP_RESULT_SHIFT; + } else { + dev_dbg(&GET_DEV(accel_dev), + "VF (vers %d) compatible with PF (vers %d)\n", + vf_compat_ver, ADF_PFVF_COMPAT_THIS_VERSION); + resp |= ADF_PF2VF_VF_COMPATIBLE << + ADF_PF2VF_VERSION_RESP_RESULT_SHIFT; + } + } + break; + case ADF_VF2PF_MSGTYPE_VERSION_REQ: + dev_dbg(&GET_DEV(accel_dev), + "Legacy VersionRequest received from VF%d 0x%x\n", + vf_nr + 1, msg); + resp = (ADF_PF2VF_MSGORIGIN_SYSTEM | + (ADF_PF2VF_MSGTYPE_VERSION_RESP << + ADF_PF2VF_MSGTYPE_SHIFT) | + (ADF_PFVF_COMPAT_THIS_VERSION << + ADF_PF2VF_VERSION_RESP_VERS_SHIFT)); + resp |= ADF_PF2VF_VF_COMPATIBLE << + ADF_PF2VF_VERSION_RESP_RESULT_SHIFT; + /* Set legacy major and minor version num */ + resp |= 1 << ADF_PF2VF_MAJORVERSION_SHIFT | + 1 << ADF_PF2VF_MINORVERSION_SHIFT; + break; + case ADF_VF2PF_MSGTYPE_INIT: + { + dev_dbg(&GET_DEV(accel_dev), + "Init message received from VF%d 0x%x\n", + vf_nr + 1, msg); + vf_info->init = true; + } + break; + case ADF_VF2PF_MSGTYPE_SHUTDOWN: + { + dev_dbg(&GET_DEV(accel_dev), + "Shutdown message received from VF%d 0x%x\n", + vf_nr + 1, msg); + vf_info->init = false; + } + break; + default: + dev_dbg(&GET_DEV(accel_dev), "Unknown message from VF%d (0x%x)\n", + vf_nr + 1, msg); + return -ENOMSG; + } + + *response = resp; + + return 0; +} + +bool adf_recv_and_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u32 vf_nr) +{ + u32 resp = 0; + u32 msg; + + msg = adf_recv_vf2pf_msg(accel_dev, vf_nr); + if (!msg) + return true; + + if (adf_handle_vf2pf_msg(accel_dev, vf_nr, msg, &resp)) + return false; + + if (resp && adf_send_pf2vf_msg(accel_dev, vf_nr, resp)) + dev_err(&GET_DEV(accel_dev), "Failed to send response to VF\n"); + + return true; +} + +/** + * adf_enable_pf2vf_comms() - Function enables communication from pf to vf + * + * @accel_dev: Pointer to acceleration device virtual function. + * + * This function carries out the necessary steps to setup and start the PFVF + * communication channel, if any. + * + * Return: 0 on success, error code otherwise. + */ +int adf_enable_pf2vf_comms(struct adf_accel_dev *accel_dev) +{ + spin_lock_init(&accel_dev->pf.vf2pf_ints_lock); + + return 0; +} +EXPORT_SYMBOL_GPL(adf_enable_pf2vf_comms); |