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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#include <sbi/sbi_error.h>
#include <sbi/sbi_string.h>
#include <sbi_utils/mailbox/mailbox.h>
static SBI_LIST_HEAD(mbox_list);
struct mbox_controller *mbox_controller_find(unsigned int id)
{
struct sbi_dlist *pos;
sbi_list_for_each(pos, &mbox_list) {
struct mbox_controller *mbox = to_mbox_controller(pos);
if (mbox->id == id)
return mbox;
}
return NULL;
}
int mbox_controller_add(struct mbox_controller *mbox)
{
if (!mbox || !mbox->max_xfer_len)
return SBI_EINVAL;
if (mbox_controller_find(mbox->id))
return SBI_EALREADY;
ATOMIC_INIT(&mbox->xfer_next_seq, 0);
SBI_INIT_LIST_HEAD(&mbox->chan_list);
sbi_list_add(&mbox->node, &mbox_list);
return 0;
}
void mbox_controller_remove(struct mbox_controller *mbox)
{
struct mbox_chan *chan;
if (!mbox)
return;
while (!sbi_list_empty(&mbox->chan_list)) {
chan = sbi_list_first_entry(&mbox->chan_list,
struct mbox_chan, node);
if (mbox->free_chan)
mbox->free_chan(mbox, chan);
sbi_list_del(&chan->node);
}
sbi_list_del(&mbox->node);
}
struct mbox_chan *mbox_controller_request_chan(struct mbox_controller *mbox,
u32 *chan_args)
{
struct mbox_chan *ret;
struct sbi_dlist *pos;
if (!chan_args || !mbox || !mbox->request_chan)
return NULL;
sbi_list_for_each(pos, &mbox->chan_list) {
ret = to_mbox_chan(pos);
if (!sbi_memcmp(ret->chan_args, chan_args,
sizeof(ret->chan_args)))
return ret;
}
ret = mbox->request_chan(mbox, chan_args);
if (!ret)
return NULL;
ret->mbox = mbox;
sbi_memcpy(ret->chan_args, chan_args, sizeof(ret->chan_args));
sbi_list_add(&ret->node, &mbox->chan_list);
return ret;
}
void mbox_controller_free_chan(struct mbox_chan *chan)
{
if (!chan || !chan->mbox)
return;
if (chan->mbox->free_chan)
chan->mbox->free_chan(chan->mbox, chan);
sbi_list_del(&chan->node);
}
int mbox_chan_xfer(struct mbox_chan *chan, struct mbox_xfer *xfer)
{
if (!xfer || !chan || !chan->mbox || !chan->mbox->xfer)
return SBI_EINVAL;
if (xfer->tx && (xfer->tx_len > chan->mbox->max_xfer_len))
return SBI_EINVAL;
if (xfer->rx && (xfer->rx_len > chan->mbox->max_xfer_len))
return SBI_EINVAL;
if (!(xfer->flags & MBOX_XFER_SEQ))
mbox_xfer_set_sequence(xfer,
atomic_add_return(&chan->mbox->xfer_next_seq, 1));
return chan->mbox->xfer(chan, xfer);
}
int mbox_chan_get_attribute(struct mbox_chan *chan, int attr_id, void *out_value)
{
if (!chan || !chan->mbox || !out_value)
return SBI_EINVAL;
if (!chan->mbox->get_attribute)
return SBI_ENOTSUPP;
return chan->mbox->get_attribute(chan, attr_id, out_value);
}
int mbox_chan_set_attribute(struct mbox_chan *chan, int attr_id, void *new_value)
{
if (!chan || !chan->mbox || !new_value)
return SBI_EINVAL;
if (!chan->mbox->set_attribute)
return SBI_ENOTSUPP;
return chan->mbox->set_attribute(chan, attr_id, new_value);
}
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