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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Cavium, Inc
*/
#include <rte_ethdev_driver.h>
#include <rte_cycles.h>
#include "lio_logs.h"
#include "lio_struct.h"
#include "lio_mbox.h"
/**
* lio_mbox_read:
* @mbox: Pointer mailbox
*
* Reads the 8-bytes of data from the mbox register
* Writes back the acknowledgment indicating completion of read
*/
int
lio_mbox_read(struct lio_mbox *mbox)
{
union lio_mbox_message msg;
int ret = 0;
msg.mbox_msg64 = rte_read64(mbox->mbox_read_reg);
if ((msg.mbox_msg64 == LIO_PFVFACK) || (msg.mbox_msg64 == LIO_PFVFSIG))
return 0;
if (mbox->state & LIO_MBOX_STATE_REQ_RECEIVING) {
mbox->mbox_req.data[mbox->mbox_req.recv_len - 1] =
msg.mbox_msg64;
mbox->mbox_req.recv_len++;
} else {
if (mbox->state & LIO_MBOX_STATE_RES_RECEIVING) {
mbox->mbox_resp.data[mbox->mbox_resp.recv_len - 1] =
msg.mbox_msg64;
mbox->mbox_resp.recv_len++;
} else {
if ((mbox->state & LIO_MBOX_STATE_IDLE) &&
(msg.s.type == LIO_MBOX_REQUEST)) {
mbox->state &= ~LIO_MBOX_STATE_IDLE;
mbox->state |= LIO_MBOX_STATE_REQ_RECEIVING;
mbox->mbox_req.msg.mbox_msg64 = msg.mbox_msg64;
mbox->mbox_req.q_no = mbox->q_no;
mbox->mbox_req.recv_len = 1;
} else {
if ((mbox->state &
LIO_MBOX_STATE_RES_PENDING) &&
(msg.s.type == LIO_MBOX_RESPONSE)) {
mbox->state &=
~LIO_MBOX_STATE_RES_PENDING;
mbox->state |=
LIO_MBOX_STATE_RES_RECEIVING;
mbox->mbox_resp.msg.mbox_msg64 =
msg.mbox_msg64;
mbox->mbox_resp.q_no = mbox->q_no;
mbox->mbox_resp.recv_len = 1;
} else {
rte_write64(LIO_PFVFERR,
mbox->mbox_read_reg);
mbox->state |= LIO_MBOX_STATE_ERROR;
return -1;
}
}
}
}
if (mbox->state & LIO_MBOX_STATE_REQ_RECEIVING) {
if (mbox->mbox_req.recv_len < msg.s.len) {
ret = 0;
} else {
mbox->state &= ~LIO_MBOX_STATE_REQ_RECEIVING;
mbox->state |= LIO_MBOX_STATE_REQ_RECEIVED;
ret = 1;
}
} else {
if (mbox->state & LIO_MBOX_STATE_RES_RECEIVING) {
if (mbox->mbox_resp.recv_len < msg.s.len) {
ret = 0;
} else {
mbox->state &= ~LIO_MBOX_STATE_RES_RECEIVING;
mbox->state |= LIO_MBOX_STATE_RES_RECEIVED;
ret = 1;
}
} else {
RTE_ASSERT(0);
}
}
rte_write64(LIO_PFVFACK, mbox->mbox_read_reg);
return ret;
}
/**
* lio_mbox_write:
* @lio_dev: Pointer lio device
* @mbox_cmd: Cmd to send to mailbox.
*
* Populates the queue specific mbox structure
* with cmd information.
* Write the cmd to mbox register
*/
int
lio_mbox_write(struct lio_device *lio_dev,
struct lio_mbox_cmd *mbox_cmd)
{
struct lio_mbox *mbox = lio_dev->mbox[mbox_cmd->q_no];
uint32_t count, i, ret = LIO_MBOX_STATUS_SUCCESS;
if ((mbox_cmd->msg.s.type == LIO_MBOX_RESPONSE) &&
!(mbox->state & LIO_MBOX_STATE_REQ_RECEIVED))
return LIO_MBOX_STATUS_FAILED;
if ((mbox_cmd->msg.s.type == LIO_MBOX_REQUEST) &&
!(mbox->state & LIO_MBOX_STATE_IDLE))
return LIO_MBOX_STATUS_BUSY;
if (mbox_cmd->msg.s.type == LIO_MBOX_REQUEST) {
rte_memcpy(&mbox->mbox_resp, mbox_cmd,
sizeof(struct lio_mbox_cmd));
mbox->state = LIO_MBOX_STATE_RES_PENDING;
}
count = 0;
while (rte_read64(mbox->mbox_write_reg) != LIO_PFVFSIG) {
rte_delay_ms(1);
if (count++ == 1000) {
ret = LIO_MBOX_STATUS_FAILED;
break;
}
}
if (ret == LIO_MBOX_STATUS_SUCCESS) {
rte_write64(mbox_cmd->msg.mbox_msg64, mbox->mbox_write_reg);
for (i = 0; i < (uint32_t)(mbox_cmd->msg.s.len - 1); i++) {
count = 0;
while (rte_read64(mbox->mbox_write_reg) !=
LIO_PFVFACK) {
rte_delay_ms(1);
if (count++ == 1000) {
ret = LIO_MBOX_STATUS_FAILED;
break;
}
}
rte_write64(mbox_cmd->data[i], mbox->mbox_write_reg);
}
}
if (mbox_cmd->msg.s.type == LIO_MBOX_RESPONSE) {
mbox->state = LIO_MBOX_STATE_IDLE;
rte_write64(LIO_PFVFSIG, mbox->mbox_read_reg);
} else {
if ((!mbox_cmd->msg.s.resp_needed) ||
(ret == LIO_MBOX_STATUS_FAILED)) {
mbox->state &= ~LIO_MBOX_STATE_RES_PENDING;
if (!(mbox->state & (LIO_MBOX_STATE_REQ_RECEIVING |
LIO_MBOX_STATE_REQ_RECEIVED)))
mbox->state = LIO_MBOX_STATE_IDLE;
}
}
return ret;
}
/**
* lio_mbox_process_cmd:
* @mbox: Pointer mailbox
* @mbox_cmd: Pointer to command received
*
* Process the cmd received in mbox
*/
static int
lio_mbox_process_cmd(struct lio_mbox *mbox,
struct lio_mbox_cmd *mbox_cmd)
{
struct lio_device *lio_dev = mbox->lio_dev;
if (mbox_cmd->msg.s.cmd == LIO_CORES_CRASHED)
lio_dev_err(lio_dev, "Octeon core(s) crashed or got stuck!\n");
return 0;
}
/**
* Process the received mbox message.
*/
int
lio_mbox_process_message(struct lio_mbox *mbox)
{
struct lio_mbox_cmd mbox_cmd;
if (mbox->state & LIO_MBOX_STATE_ERROR) {
if (mbox->state & (LIO_MBOX_STATE_RES_PENDING |
LIO_MBOX_STATE_RES_RECEIVING)) {
rte_memcpy(&mbox_cmd, &mbox->mbox_resp,
sizeof(struct lio_mbox_cmd));
mbox->state = LIO_MBOX_STATE_IDLE;
rte_write64(LIO_PFVFSIG, mbox->mbox_read_reg);
mbox_cmd.recv_status = 1;
if (mbox_cmd.fn)
mbox_cmd.fn(mbox->lio_dev, &mbox_cmd,
mbox_cmd.fn_arg);
return 0;
}
mbox->state = LIO_MBOX_STATE_IDLE;
rte_write64(LIO_PFVFSIG, mbox->mbox_read_reg);
return 0;
}
if (mbox->state & LIO_MBOX_STATE_RES_RECEIVED) {
rte_memcpy(&mbox_cmd, &mbox->mbox_resp,
sizeof(struct lio_mbox_cmd));
mbox->state = LIO_MBOX_STATE_IDLE;
rte_write64(LIO_PFVFSIG, mbox->mbox_read_reg);
mbox_cmd.recv_status = 0;
if (mbox_cmd.fn)
mbox_cmd.fn(mbox->lio_dev, &mbox_cmd, mbox_cmd.fn_arg);
return 0;
}
if (mbox->state & LIO_MBOX_STATE_REQ_RECEIVED) {
rte_memcpy(&mbox_cmd, &mbox->mbox_req,
sizeof(struct lio_mbox_cmd));
if (!mbox_cmd.msg.s.resp_needed) {
mbox->state &= ~LIO_MBOX_STATE_REQ_RECEIVED;
if (!(mbox->state & LIO_MBOX_STATE_RES_PENDING))
mbox->state = LIO_MBOX_STATE_IDLE;
rte_write64(LIO_PFVFSIG, mbox->mbox_read_reg);
}
lio_mbox_process_cmd(mbox, &mbox_cmd);
return 0;
}
RTE_ASSERT(0);
return 0;
}
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