Revision d1bc75d7595b237f78b594509ea7cc159f98cae9 authored by WANG Xuerui on 26 July 2022, 15:57:20 UTC, committed by Huacai Chen on 29 July 2022, 10:22:32 UTC
Support for the syntactic sugar is present in upstream binutils port from the beginning. Use it for shorter lines and better consistency. Generated code should be identical. Signed-off-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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adf_pfvf_pf_proto.c
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2015 - 2021 Intel Corporation */
#include <linux/bitfield.h>
#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_msg.h"
#include "adf_pfvf_pf_proto.h"
#include "adf_pfvf_utils.h"
typedef u8 (*pf2vf_blkmsg_data_getter_fn)(u8 const *blkmsg, u8 byte);
static const adf_pf2vf_blkmsg_provider pf2vf_blkmsg_providers[] = {
NULL, /* no message type defined for value 0 */
NULL, /* no message type defined for value 1 */
adf_pf_capabilities_msg_provider, /* ADF_VF2PF_BLKMSG_REQ_CAP_SUMMARY */
adf_pf_ring_to_svc_msg_provider, /* ADF_VF2PF_BLKMSG_REQ_RING_SVC_MAP */
};
/**
* 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, struct pfvf_message msg)
{
struct adf_pfvf_ops *pfvf_ops = GET_PFVF_OPS(accel_dev);
u32 pfvf_offset = pfvf_ops->get_pf2vf_offset(vf_nr);
return pfvf_ops->send_msg(accel_dev, msg, pfvf_offset,
&accel_dev->pf.vf_info[vf_nr].pf2vf_lock);
}
/**
* 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 struct pfvf_message adf_recv_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr)
{
struct adf_accel_vf_info *vf_info = &accel_dev->pf.vf_info[vf_nr];
struct adf_pfvf_ops *pfvf_ops = GET_PFVF_OPS(accel_dev);
u32 pfvf_offset = pfvf_ops->get_vf2pf_offset(vf_nr);
return pfvf_ops->recv_msg(accel_dev, pfvf_offset, vf_info->vf_compat_ver);
}
static adf_pf2vf_blkmsg_provider get_blkmsg_response_provider(u8 type)
{
if (type >= ARRAY_SIZE(pf2vf_blkmsg_providers))
return NULL;
return pf2vf_blkmsg_providers[type];
}
/* Byte pf2vf_blkmsg_data_getter_fn callback */
static u8 adf_pf2vf_blkmsg_get_byte(u8 const *blkmsg, u8 index)
{
return blkmsg[index];
}
/* CRC pf2vf_blkmsg_data_getter_fn callback */
static u8 adf_pf2vf_blkmsg_get_crc(u8 const *blkmsg, u8 count)
{
/* count is 0-based, turn it into a length */
return adf_pfvf_calc_blkmsg_crc(blkmsg, count + 1);
}
static int adf_pf2vf_blkmsg_get_data(struct adf_accel_vf_info *vf_info,
u8 type, u8 byte, u8 max_size, u8 *data,
pf2vf_blkmsg_data_getter_fn data_getter)
{
u8 blkmsg[ADF_PFVF_BLKMSG_MSG_MAX_SIZE] = { 0 };
struct adf_accel_dev *accel_dev = vf_info->accel_dev;
adf_pf2vf_blkmsg_provider provider;
u8 msg_size;
provider = get_blkmsg_response_provider(type);
if (unlikely(!provider)) {
pr_err("QAT: No registered provider for message %d\n", type);
*data = ADF_PF2VF_INVALID_BLOCK_TYPE;
return -EINVAL;
}
if (unlikely((*provider)(accel_dev, blkmsg, vf_info->vf_compat_ver))) {
pr_err("QAT: unknown error from provider for message %d\n", type);
*data = ADF_PF2VF_UNSPECIFIED_ERROR;
return -EINVAL;
}
msg_size = ADF_PFVF_BLKMSG_HEADER_SIZE + blkmsg[ADF_PFVF_BLKMSG_LEN_BYTE];
if (unlikely(msg_size >= max_size)) {
pr_err("QAT: Invalid size %d provided for message type %d\n",
msg_size, type);
*data = ADF_PF2VF_PAYLOAD_TRUNCATED;
return -EINVAL;
}
if (unlikely(byte >= msg_size)) {
pr_err("QAT: Out-of-bound byte number %d (msg size %d)\n",
byte, msg_size);
*data = ADF_PF2VF_INVALID_BYTE_NUM_REQ;
return -EINVAL;
}
*data = data_getter(blkmsg, byte);
return 0;
}
static struct pfvf_message handle_blkmsg_req(struct adf_accel_vf_info *vf_info,
struct pfvf_message req)
{
u8 resp_type = ADF_PF2VF_BLKMSG_RESP_TYPE_ERROR;
struct pfvf_message resp = { 0 };
u8 resp_data = 0;
u8 blk_type;
u8 blk_byte;
u8 byte_max;
switch (req.type) {
case ADF_VF2PF_MSGTYPE_LARGE_BLOCK_REQ:
blk_type = FIELD_GET(ADF_VF2PF_LARGE_BLOCK_TYPE_MASK, req.data)
+ ADF_VF2PF_MEDIUM_BLOCK_TYPE_MAX + 1;
blk_byte = FIELD_GET(ADF_VF2PF_LARGE_BLOCK_BYTE_MASK, req.data);
byte_max = ADF_VF2PF_LARGE_BLOCK_BYTE_MAX;
break;
case ADF_VF2PF_MSGTYPE_MEDIUM_BLOCK_REQ:
blk_type = FIELD_GET(ADF_VF2PF_MEDIUM_BLOCK_TYPE_MASK, req.data)
+ ADF_VF2PF_SMALL_BLOCK_TYPE_MAX + 1;
blk_byte = FIELD_GET(ADF_VF2PF_MEDIUM_BLOCK_BYTE_MASK, req.data);
byte_max = ADF_VF2PF_MEDIUM_BLOCK_BYTE_MAX;
break;
case ADF_VF2PF_MSGTYPE_SMALL_BLOCK_REQ:
blk_type = FIELD_GET(ADF_VF2PF_SMALL_BLOCK_TYPE_MASK, req.data);
blk_byte = FIELD_GET(ADF_VF2PF_SMALL_BLOCK_BYTE_MASK, req.data);
byte_max = ADF_VF2PF_SMALL_BLOCK_BYTE_MAX;
break;
}
/* Is this a request for CRC or data? */
if (FIELD_GET(ADF_VF2PF_BLOCK_CRC_REQ_MASK, req.data)) {
dev_dbg(&GET_DEV(vf_info->accel_dev),
"BlockMsg of type %d for CRC over %d bytes received from VF%d\n",
blk_type, blk_byte + 1, vf_info->vf_nr);
if (!adf_pf2vf_blkmsg_get_data(vf_info, blk_type, blk_byte,
byte_max, &resp_data,
adf_pf2vf_blkmsg_get_crc))
resp_type = ADF_PF2VF_BLKMSG_RESP_TYPE_CRC;
} else {
dev_dbg(&GET_DEV(vf_info->accel_dev),
"BlockMsg of type %d for data byte %d received from VF%d\n",
blk_type, blk_byte, vf_info->vf_nr);
if (!adf_pf2vf_blkmsg_get_data(vf_info, blk_type, blk_byte,
byte_max, &resp_data,
adf_pf2vf_blkmsg_get_byte))
resp_type = ADF_PF2VF_BLKMSG_RESP_TYPE_DATA;
}
resp.type = ADF_PF2VF_MSGTYPE_BLKMSG_RESP;
resp.data = FIELD_PREP(ADF_PF2VF_BLKMSG_RESP_TYPE_MASK, resp_type) |
FIELD_PREP(ADF_PF2VF_BLKMSG_RESP_DATA_MASK, resp_data);
return resp;
}
static struct pfvf_message handle_rp_reset_req(struct adf_accel_dev *accel_dev, u8 vf_nr,
struct pfvf_message req)
{
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
struct pfvf_message resp = {
.type = ADF_PF2VF_MSGTYPE_RP_RESET_RESP,
.data = RPRESET_SUCCESS
};
u32 bank_number;
u32 rsvd_field;
bank_number = FIELD_GET(ADF_VF2PF_RNG_RESET_RP_MASK, req.data);
rsvd_field = FIELD_GET(ADF_VF2PF_RNG_RESET_RSVD_MASK, req.data);
dev_dbg(&GET_DEV(accel_dev),
"Ring Pair Reset Message received from VF%d for bank 0x%x\n",
vf_nr, bank_number);
if (!hw_data->ring_pair_reset || rsvd_field) {
dev_dbg(&GET_DEV(accel_dev),
"Ring Pair Reset for VF%d is not supported\n", vf_nr);
resp.data = RPRESET_NOT_SUPPORTED;
goto out;
}
if (bank_number >= hw_data->num_banks_per_vf) {
dev_err(&GET_DEV(accel_dev),
"Invalid bank number (0x%x) from VF%d for Ring Reset\n",
bank_number, vf_nr);
resp.data = RPRESET_INVAL_BANK;
goto out;
}
/* Convert the VF provided value to PF bank number */
bank_number = vf_nr * hw_data->num_banks_per_vf + bank_number;
if (hw_data->ring_pair_reset(accel_dev, bank_number)) {
dev_dbg(&GET_DEV(accel_dev),
"Ring pair reset for VF%d failure\n", vf_nr);
resp.data = RPRESET_TIMEOUT;
goto out;
}
dev_dbg(&GET_DEV(accel_dev),
"Ring pair reset for VF%d successfully\n", vf_nr);
out:
return resp;
}
static int adf_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr,
struct pfvf_message msg, struct pfvf_message *resp)
{
struct adf_accel_vf_info *vf_info = &accel_dev->pf.vf_info[vf_nr];
switch (msg.type) {
case ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ:
{
u8 vf_compat_ver = msg.data;
u8 compat;
dev_dbg(&GET_DEV(accel_dev),
"VersionRequest received from VF%d (vers %d) to PF (vers %d)\n",
vf_nr, vf_compat_ver, ADF_PFVF_COMPAT_THIS_VERSION);
if (vf_compat_ver == 0)
compat = ADF_PF2VF_VF_INCOMPATIBLE;
else if (vf_compat_ver <= ADF_PFVF_COMPAT_THIS_VERSION)
compat = ADF_PF2VF_VF_COMPATIBLE;
else
compat = ADF_PF2VF_VF_COMPAT_UNKNOWN;
vf_info->vf_compat_ver = vf_compat_ver;
resp->type = ADF_PF2VF_MSGTYPE_VERSION_RESP;
resp->data = FIELD_PREP(ADF_PF2VF_VERSION_RESP_VERS_MASK,
ADF_PFVF_COMPAT_THIS_VERSION) |
FIELD_PREP(ADF_PF2VF_VERSION_RESP_RESULT_MASK, compat);
}
break;
case ADF_VF2PF_MSGTYPE_VERSION_REQ:
{
u8 compat;
dev_dbg(&GET_DEV(accel_dev),
"Legacy VersionRequest received from VF%d to PF (vers 1.1)\n",
vf_nr);
/* legacy driver, VF compat_ver is 0 */
vf_info->vf_compat_ver = 0;
/* PF always newer than legacy VF */
compat = ADF_PF2VF_VF_COMPATIBLE;
/* Set legacy major and minor version to the latest, 1.1 */
resp->type = ADF_PF2VF_MSGTYPE_VERSION_RESP;
resp->data = FIELD_PREP(ADF_PF2VF_VERSION_RESP_VERS_MASK, 0x11) |
FIELD_PREP(ADF_PF2VF_VERSION_RESP_RESULT_MASK, compat);
}
break;
case ADF_VF2PF_MSGTYPE_INIT:
{
dev_dbg(&GET_DEV(accel_dev),
"Init message received from VF%d\n", vf_nr);
vf_info->init = true;
}
break;
case ADF_VF2PF_MSGTYPE_SHUTDOWN:
{
dev_dbg(&GET_DEV(accel_dev),
"Shutdown message received from VF%d\n", vf_nr);
vf_info->init = false;
}
break;
case ADF_VF2PF_MSGTYPE_LARGE_BLOCK_REQ:
case ADF_VF2PF_MSGTYPE_MEDIUM_BLOCK_REQ:
case ADF_VF2PF_MSGTYPE_SMALL_BLOCK_REQ:
*resp = handle_blkmsg_req(vf_info, msg);
break;
case ADF_VF2PF_MSGTYPE_RP_RESET:
*resp = handle_rp_reset_req(accel_dev, vf_nr, msg);
break;
default:
dev_dbg(&GET_DEV(accel_dev),
"Unknown message from VF%d (type 0x%.4x, data: 0x%.4x)\n",
vf_nr, msg.type, msg.data);
return -ENOMSG;
}
return 0;
}
bool adf_recv_and_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u32 vf_nr)
{
struct pfvf_message req;
struct pfvf_message resp = {0};
req = adf_recv_vf2pf_msg(accel_dev, vf_nr);
if (!req.type) /* Legacy or no message */
return true;
if (adf_handle_vf2pf_msg(accel_dev, vf_nr, req, &resp))
return false;
if (resp.type && adf_send_pf2vf_msg(accel_dev, vf_nr, resp))
dev_err(&GET_DEV(accel_dev),
"Failed to send response to VF%d\n", vf_nr);
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)
{
adf_pfvf_crc_init();
spin_lock_init(&accel_dev->pf.vf2pf_ints_lock);
return 0;
}
EXPORT_SYMBOL_GPL(adf_enable_pf2vf_comms);
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