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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022 MediaTek Inc.
* Author: Ping-Hsun Wu <ping-hsun.wu@mediatek.com>
*/
#include <linux/remoteproc.h>
#include <linux/remoteproc/mtk_scp.h>
#include "mtk-mdp3-vpu.h"
#include "mtk-mdp3-core.h"
#define MDP_VPU_MESSAGE_TIMEOUT 500U
static inline struct mdp_dev *vpu_to_mdp(struct mdp_vpu_dev *vpu)
{
return container_of(vpu, struct mdp_dev, vpu);
}
static int mdp_vpu_shared_mem_alloc(struct mdp_vpu_dev *vpu)
{
struct device *dev;
if (IS_ERR_OR_NULL(vpu))
goto err_return;
dev = scp_get_device(vpu->scp);
if (!vpu->param) {
vpu->param = dma_alloc_wc(dev, vpu->param_size,
&vpu->param_addr, GFP_KERNEL);
if (!vpu->param)
goto err_return;
}
if (!vpu->work) {
vpu->work = dma_alloc_wc(dev, vpu->work_size,
&vpu->work_addr, GFP_KERNEL);
if (!vpu->work)
goto err_free_param;
}
if (!vpu->config) {
vpu->config = dma_alloc_wc(dev, vpu->config_size,
&vpu->config_addr, GFP_KERNEL);
if (!vpu->config)
goto err_free_work;
}
return 0;
err_free_work:
dma_free_wc(dev, vpu->work_size, vpu->work, vpu->work_addr);
vpu->work = NULL;
err_free_param:
dma_free_wc(dev, vpu->param_size, vpu->param, vpu->param_addr);
vpu->param = NULL;
err_return:
return -ENOMEM;
}
void mdp_vpu_shared_mem_free(struct mdp_vpu_dev *vpu)
{
struct device *dev;
if (IS_ERR_OR_NULL(vpu))
return;
dev = scp_get_device(vpu->scp);
if (vpu->param && vpu->param_addr)
dma_free_wc(dev, vpu->param_size, vpu->param, vpu->param_addr);
if (vpu->work && vpu->work_addr)
dma_free_wc(dev, vpu->work_size, vpu->work, vpu->work_addr);
if (vpu->config && vpu->config_addr)
dma_free_wc(dev, vpu->config_size, vpu->config, vpu->config_addr);
}
static void mdp_vpu_ipi_handle_init_ack(void *data, unsigned int len,
void *priv)
{
struct mdp_ipi_init_msg *msg = (struct mdp_ipi_init_msg *)data;
struct mdp_vpu_dev *vpu =
(struct mdp_vpu_dev *)(unsigned long)msg->drv_data;
if (!vpu->work_size)
vpu->work_size = msg->work_size;
vpu->status = msg->status;
complete(&vpu->ipi_acked);
}
static void mdp_vpu_ipi_handle_deinit_ack(void *data, unsigned int len,
void *priv)
{
struct mdp_ipi_deinit_msg *msg = (struct mdp_ipi_deinit_msg *)data;
struct mdp_vpu_dev *vpu =
(struct mdp_vpu_dev *)(unsigned long)msg->drv_data;
vpu->status = msg->status;
complete(&vpu->ipi_acked);
}
static void mdp_vpu_ipi_handle_frame_ack(void *data, unsigned int len,
void *priv)
{
struct img_sw_addr *addr = (struct img_sw_addr *)data;
struct img_ipi_frameparam *param =
(struct img_ipi_frameparam *)(unsigned long)addr->va;
struct mdp_vpu_dev *vpu =
(struct mdp_vpu_dev *)(unsigned long)param->drv_data;
if (param->state) {
struct mdp_dev *mdp = vpu_to_mdp(vpu);
dev_err(&mdp->pdev->dev, "VPU MDP failure:%d\n", param->state);
}
vpu->status = param->state;
complete(&vpu->ipi_acked);
}
int mdp_vpu_register(struct mdp_dev *mdp)
{
int err;
struct mtk_scp *scp = mdp->scp;
struct device *dev = &mdp->pdev->dev;
err = scp_ipi_register(scp, SCP_IPI_MDP_INIT,
mdp_vpu_ipi_handle_init_ack, NULL);
if (err) {
dev_err(dev, "scp_ipi_register failed %d\n", err);
goto err_ipi_init;
}
err = scp_ipi_register(scp, SCP_IPI_MDP_DEINIT,
mdp_vpu_ipi_handle_deinit_ack, NULL);
if (err) {
dev_err(dev, "scp_ipi_register failed %d\n", err);
goto err_ipi_deinit;
}
err = scp_ipi_register(scp, SCP_IPI_MDP_FRAME,
mdp_vpu_ipi_handle_frame_ack, NULL);
if (err) {
dev_err(dev, "scp_ipi_register failed %d\n", err);
goto err_ipi_frame;
}
return 0;
err_ipi_frame:
scp_ipi_unregister(scp, SCP_IPI_MDP_DEINIT);
err_ipi_deinit:
scp_ipi_unregister(scp, SCP_IPI_MDP_INIT);
err_ipi_init:
return err;
}
void mdp_vpu_unregister(struct mdp_dev *mdp)
{
scp_ipi_unregister(mdp->scp, SCP_IPI_MDP_INIT);
scp_ipi_unregister(mdp->scp, SCP_IPI_MDP_DEINIT);
scp_ipi_unregister(mdp->scp, SCP_IPI_MDP_FRAME);
}
static int mdp_vpu_sendmsg(struct mdp_vpu_dev *vpu, enum scp_ipi_id id,
void *buf, unsigned int len)
{
struct mdp_dev *mdp = vpu_to_mdp(vpu);
unsigned int t = MDP_VPU_MESSAGE_TIMEOUT;
int ret;
if (!vpu->scp) {
dev_dbg(&mdp->pdev->dev, "vpu scp is NULL");
return -EINVAL;
}
ret = scp_ipi_send(vpu->scp, id, buf, len, 2000);
if (ret) {
dev_err(&mdp->pdev->dev, "scp_ipi_send failed %d\n", ret);
return -EPERM;
}
ret = wait_for_completion_timeout(&vpu->ipi_acked,
msecs_to_jiffies(t));
if (!ret)
ret = -ETIME;
else if (vpu->status)
ret = -EINVAL;
else
ret = 0;
return ret;
}
int mdp_vpu_dev_init(struct mdp_vpu_dev *vpu, struct mtk_scp *scp,
struct mutex *lock)
{
struct mdp_ipi_init_msg msg = {
.drv_data = (unsigned long)vpu,
};
struct mdp_dev *mdp = vpu_to_mdp(vpu);
int err;
u8 pp_num = mdp->mdp_data->pp_used;
init_completion(&vpu->ipi_acked);
vpu->scp = scp;
vpu->lock = lock;
vpu->work_size = 0;
err = mdp_vpu_sendmsg(vpu, SCP_IPI_MDP_INIT, &msg, sizeof(msg));
if (err)
goto err_work_size;
/* vpu work_size was set in mdp_vpu_ipi_handle_init_ack */
mutex_lock(vpu->lock);
vpu->work_size = ALIGN(vpu->work_size, 64);
vpu->param_size = ALIGN(sizeof(struct img_ipi_frameparam), 64);
vpu->config_size = ALIGN(sizeof(struct img_config) * pp_num, 64);
err = mdp_vpu_shared_mem_alloc(vpu);
mutex_unlock(vpu->lock);
if (err) {
dev_err(&mdp->pdev->dev, "VPU memory alloc fail!");
goto err_mem_alloc;
}
dev_dbg(&mdp->pdev->dev,
"VPU param:%pK pa:%pad sz:%zx, work:%pK pa:%pad sz:%zx, config:%pK pa:%pad sz:%zx",
vpu->param, &vpu->param_addr, vpu->param_size,
vpu->work, &vpu->work_addr, vpu->work_size,
vpu->config, &vpu->config_addr, vpu->config_size);
msg.work_addr = vpu->work_addr;
msg.work_size = vpu->work_size;
err = mdp_vpu_sendmsg(vpu, SCP_IPI_MDP_INIT, &msg, sizeof(msg));
if (err)
goto err_work_size;
return 0;
err_work_size:
switch (vpu->status) {
case -MDP_IPI_EBUSY:
err = -EBUSY;
break;
case -MDP_IPI_ENOMEM:
err = -ENOSPC; /* -ENOMEM */
break;
}
return err;
err_mem_alloc:
return err;
}
int mdp_vpu_dev_deinit(struct mdp_vpu_dev *vpu)
{
struct mdp_ipi_deinit_msg msg = {
.drv_data = (unsigned long)vpu,
.work_addr = vpu->work_addr,
};
return mdp_vpu_sendmsg(vpu, SCP_IPI_MDP_DEINIT, &msg, sizeof(msg));
}
int mdp_vpu_process(struct mdp_vpu_dev *vpu, struct img_ipi_frameparam *param)
{
struct mdp_dev *mdp = vpu_to_mdp(vpu);
struct img_sw_addr addr;
mutex_lock(vpu->lock);
if (mdp_vpu_shared_mem_alloc(vpu)) {
dev_err(&mdp->pdev->dev, "VPU memory alloc fail!");
mutex_unlock(vpu->lock);
return -ENOMEM;
}
memset(vpu->param, 0, vpu->param_size);
memset(vpu->work, 0, vpu->work_size);
memset(vpu->config, 0, vpu->config_size);
param->self_data.va = (unsigned long)vpu->work;
param->self_data.pa = vpu->work_addr;
param->config_data.va = (unsigned long)vpu->config;
param->config_data.pa = vpu->config_addr;
param->drv_data = (unsigned long)vpu;
memcpy(vpu->param, param, sizeof(*param));
addr.pa = vpu->param_addr;
addr.va = (unsigned long)vpu->param;
mutex_unlock(vpu->lock);
return mdp_vpu_sendmsg(vpu, SCP_IPI_MDP_FRAME, &addr, sizeof(addr));
}
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