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Message-ID: <d49c5a614fb80f1a7f073e398db72c0d8b63c32b.camel@ndufresne.ca>
Subject: Re: [PATCH v9 04/13] media: amphion: add vpu core driver
From:   Nicolas Dufresne <nicolas@ndufresne.ca>
To:     Ming Qian <ming.qian@nxp.com>, mchehab@kernel.org,
        shawnguo@kernel.org, robh+dt@kernel.org, s.hauer@pengutronix.de
Cc:     hverkuil-cisco@xs4all.nl, kernel@pengutronix.de,
        festevam@gmail.com, linux-imx@nxp.com, aisheng.dong@nxp.com,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Date:   Thu, 23 Sep 2021 10:27:21 -0400
In-Reply-To: <51ba61663ce92a9fe71343578689a0e196d0dfea.1631521295.git.ming.qian@nxp.com>
References: <cover.1631521295.git.ming.qian@nxp.com>
         <51ba61663ce92a9fe71343578689a0e196d0dfea.1631521295.git.ming.qian@nxp.com>
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Le lundi 13 septembre 2021 à 17:11 +0800, Ming Qian a écrit :
> The vpu supports encoder and decoder.
> it needs mu core to handle it.
> core will run either encoder or decoder firmware.
> 
> This driver is for support the vpu core.
> 
> Signed-off-by: Ming Qian <ming.qian@nxp.com>
> Signed-off-by: Shijie Qin <shijie.qin@nxp.com>
> Signed-off-by: Zhou Peng <eagle.zhou@nxp.com>
> ---
>  drivers/media/platform/amphion/vpu_codec.h |  68 ++
>  drivers/media/platform/amphion/vpu_core.c  | 901 +++++++++++++++++++++
>  drivers/media/platform/amphion/vpu_core.h  |  16 +
>  drivers/media/platform/amphion/vpu_dbg.c   | 496 ++++++++++++
>  drivers/media/platform/amphion/vpu_log.h   |  44 +
>  drivers/media/platform/amphion/vpu_rpc.c   | 263 ++++++
>  drivers/media/platform/amphion/vpu_rpc.h   | 463 +++++++++++
>  7 files changed, 2251 insertions(+)
>  create mode 100644 drivers/media/platform/amphion/vpu_codec.h
>  create mode 100644 drivers/media/platform/amphion/vpu_core.c
>  create mode 100644 drivers/media/platform/amphion/vpu_core.h
>  create mode 100644 drivers/media/platform/amphion/vpu_dbg.c
>  create mode 100644 drivers/media/platform/amphion/vpu_log.h
>  create mode 100644 drivers/media/platform/amphion/vpu_rpc.c
>  create mode 100644 drivers/media/platform/amphion/vpu_rpc.h
> 
> diff --git a/drivers/media/platform/amphion/vpu_codec.h b/drivers/media/platform/amphion/vpu_codec.h
> new file mode 100644
> index 000000000000..4dc41d6808b1
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_codec.h
> @@ -0,0 +1,68 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#ifndef _AMPHION_VPU_CODEC_H
> +#define _AMPHION_VPU_CODEC_H
> +
> +struct vpu_encode_params {
> +	u32 input_format;
> +	u32 codec_format;
> +	u32 profile;
> +	u32 tier;
> +	u32 level;
> +	u32 frame_rate_num;
> +	u32 frame_rate_den;
> +	u32 src_stride;
> +	u32 src_width;
> +	u32 src_height;
> +	struct v4l2_rect crop;
> +	u32 out_width;
> +	u32 out_height;
> +
> +	u32 gop_length;
> +	u32 bframes;
> +
> +	u32 rc_mode;
> +	u32 bitrate;
> +	u32 bitrate_min;
> +	u32 bitrate_max;
> +
> +	u32 i_frame_qp;
> +	u32 p_frame_qp;
> +	u32 b_frame_qp;
> +	u32 qp_min;
> +	u32 qp_max;
> +	u32 qp_min_i;
> +	u32 qp_max_i;
> +
> +	struct {
> +		u32 enable;
> +		u32 idc;
> +		u32 width;
> +		u32 height;
> +	} sar;
> +
> +	struct {
> +		u32 primaries;
> +		u32 transfer;
> +		u32 matrix;
> +		u32 full_range;
> +	} color;
> +};
> +
> +struct vpu_decode_params {
> +	u32 codec_format;
> +	u32 output_format;
> +	u32 b_dis_reorder;
> +	u32 b_non_frame;
> +	u32 frame_count;
> +	u32 end_flag;
> +	struct {
> +		u32 base;
> +		u32 size;
> +	} udata;
> +};
> +
> +#endif
> diff --git a/drivers/media/platform/amphion/vpu_core.c b/drivers/media/platform/amphion/vpu_core.c
> new file mode 100644
> index 000000000000..332ad3710abe
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_core.c
> @@ -0,0 +1,901 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#define TAG		"CORE"
> +
> +#include <linux/init.h>
> +#include <linux/interconnect.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/of_address.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/pm_domain.h>
> +#include <linux/firmware.h>
> +#include "vpu.h"
> +#include "vpu_defs.h"
> +#include "vpu_core.h"
> +#include "vpu_mbox.h"
> +#include "vpu_msgs.h"
> +#include "vpu_rpc.h"
> +#include "vpu_log.h"
> +#include "vpu_cmds.h"
> +
> +unsigned int vpu_dbg_level = LVL_ERR | LVL_WARN | LVL_INFO;
> +module_param(vpu_dbg_level, uint, 0644);
> +
> +void csr_writel(struct vpu_core *core, u32 reg, u32 val)
> +{
> +	writel(val, core->base + reg);
> +}
> +
> +u32 csr_readl(struct vpu_core *core, u32 reg)
> +{
> +	return readl(core->base + reg);
> +}
> +
> +static int vpu_core_load_firmware(struct vpu_core *core)
> +{
> +	const struct firmware *pfw = NULL;
> +	int ret = 0;
> +
> +	WARN_ON(!core || !core->res || !core->res->fwname);
> +	if (!core->fw.virt) {
> +		core_err(core, "firmware buffer is not ready\n");
> +		return -EINVAL;
> +	}
> +
> +	ret = request_firmware(&pfw, core->res->fwname, core->dev);
> +	core_dbg(core, LVL_DEBUG, "request_firmware %s : %d\n", core->res->fwname, ret);
> +	if (ret) {
> +		core_err(core, "request firmware %s failed, ret = %d\n",
> +				core->res->fwname, ret);
> +		return ret;
> +	}
> +
> +	if (core->fw.length < pfw->size) {
> +		core_err(core, "firmware buffer size want %zu, but %d\n",
> +				pfw->size, core->fw.length);
> +		ret = -EINVAL;
> +		goto exit;
> +	}
> +
> +	memset_io(core->fw.virt, 0, core->fw.length);
> +	memcpy(core->fw.virt, pfw->data, pfw->size);
> +	core->fw.bytesused = pfw->size;
> +	ret = vpu_iface_on_firmware_loaded(core);
> +exit:
> +	release_firmware(pfw);
> +	pfw = NULL;
> +
> +	return ret;
> +}
> +
> +static int vpu_core_wait_boot_done(struct vpu_core *core)
> +{
> +	int ret;
> +	u32 fw_version;
> +
> +	ret = wait_for_completion_timeout(&core->cmp, VPU_TIMEOUT);
> +	if (!ret) {
> +		core_err(core, "boot timeout\n");
> +		return -EINVAL;
> +	}
> +
> +	fw_version = vpu_iface_get_version(core);
> +	core_dbg(core, LVL_WARN, "firmware version : %d.%d.%d\n",
> +			(fw_version >> 16) & 0xff,
> +			(fw_version >> 8) & 0xff,
> +			fw_version & 0xff);
> +	core->supported_instance_count = vpu_iface_get_max_instance_count(core);
> +	if (core->res->act_size) {
> +		u32 count = core->act.length / core->res->act_size;
> +
> +		core->supported_instance_count = min(core->supported_instance_count, count);
> +	}
> +	core->fw_version = fw_version;
> +
> +	return 0;
> +}
> +
> +static int vpu_core_boot(struct vpu_core *core, bool load)
> +{
> +	int ret;
> +
> +	WARN_ON(!core);
> +
> +	if (!core->res->standalone)
> +		return 0;
> +
> +	core_dbg(core, LVL_WARN, "boot\n");
> +	reinit_completion(&core->cmp);
> +	if (load) {
> +		ret = vpu_core_load_firmware(core);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	vpu_iface_boot_core(core);
> +	return vpu_core_wait_boot_done(core);
> +}
> +
> +static int vpu_core_shutdown(struct vpu_core *core)
> +{
> +	if (!core->res->standalone)
> +		return 0;
> +	return vpu_iface_shutdown_core(core);
> +}
> +
> +static int vpu_core_restore(struct vpu_core *core)
> +{
> +	if (!core->res->standalone)
> +		return 0;
> +	return vpu_iface_restore_core(core);
> +}
> +
> +static int __vpu_alloc_dma(struct device *dev, struct vpu_buffer *buf)
> +{
> +	gfp_t gfp = GFP_KERNEL | GFP_DMA32;
> +
> +	WARN_ON(!dev || !buf);
> +
> +	if (!buf->length)
> +		return 0;
> +
> +	buf->virt = dma_alloc_coherent(dev, buf->length, &buf->phys, gfp);
> +	if (!buf->virt)
> +		return -ENOMEM;
> +
> +	buf->dev = dev;
> +
> +	return 0;
> +}
> +
> +void vpu_free_dma(struct vpu_buffer *buf)
> +{
> +	WARN_ON(!buf);
> +
> +	if (!buf->virt || !buf->dev)
> +		return;
> +
> +	dma_free_coherent(buf->dev, buf->length, buf->virt, buf->phys);
> +	buf->virt = NULL;
> +	buf->phys = 0;
> +	buf->length = 0;
> +	buf->bytesused = 0;
> +	buf->dev = NULL;
> +}
> +
> +int vpu_alloc_dma(struct vpu_core *core, struct vpu_buffer *buf)
> +{
> +	WARN_ON(!core || !buf);
> +
> +	return __vpu_alloc_dma(core->dev, buf);
> +}
> +
> +static struct vpu_core *vpu_core_find_next_by_type(struct vpu_dev *vpu, u32 type)
> +{
> +	struct vpu_core *c;
> +
> +	WARN_ON(!vpu);
> +
> +	list_for_each_entry(c, &vpu->cores, list) {
> +		if (c->type == type)
> +			return c;
> +	}
> +
> +	return NULL;
> +}
> +
> +int vpu_core_check_fmt(struct vpu_core *core, u32 pixelfmt)
> +{
> +	if (!core)
> +		return -EINVAL;
> +
> +	if (vpu_iface_check_format(core, pixelfmt))
> +		return 0;
> +
> +	return -EINVAL;
> +}
> +
> +static void vpu_core_check_hang(struct vpu_core *core)
> +{
> +	if (core->hang_mask)
> +		core->state = VPU_CORE_HANG;
> +}
> +
> +static struct vpu_core *vpu_core_find_proper_by_type(struct vpu_dev *vpu, u32 type)
> +{
> +	struct vpu_core *core = NULL;
> +	int request_count = INT_MAX;
> +	struct vpu_core *c;
> +
> +	WARN_ON(!vpu);
> +
> +	list_for_each_entry(c, &vpu->cores, list) {
> +		core_dbg(c, LVL_DEBUG, "instance_mask = 0x%lx, state = %d\n",
> +				c->instance_mask,
> +				c->state);
> +		if (c->type != type)
> +			continue;
> +		if (c->state == VPU_CORE_DEINIT) {
> +			core = c;
> +			break;
> +		}
> +		vpu_core_check_hang(c);
> +		if (c->state != VPU_CORE_ACTIVE)
> +			continue;
> +		if (c->request_count < request_count) {
> +			request_count = c->request_count;
> +			core = c;
> +		}
> +		if (!request_count)
> +			break;
> +	}
> +
> +	return core;
> +}
> +
> +static bool vpu_core_is_exist(struct vpu_dev *vpu, struct vpu_core *core)
> +{
> +	struct vpu_core *c;
> +
> +	list_for_each_entry(c, &vpu->cores, list) {
> +		if (c == core)
> +			return true;
> +	}
> +
> +	return false;
> +}
> +
> +static void vpu_core_get_vpu(struct vpu_core *core)
> +{
> +	core->vpu->get_vpu(core->vpu);
> +	if (core->type == VPU_CORE_TYPE_ENC)
> +		core->vpu->get_enc(core->vpu);
> +	if (core->type == VPU_CORE_TYPE_DEC)
> +		core->vpu->get_dec(core->vpu);
> +}
> +
> +static int vpu_core_register(struct device *dev, struct vpu_core *core)
> +{
> +	struct vpu_dev *vpu = dev_get_drvdata(dev);
> +	int ret = 0;
> +
> +	core_dbg(core, LVL_DEBUG, "register core\n");
> +	if (vpu_core_is_exist(vpu, core))
> +		return 0;
> +
> +	core->workqueue = alloc_workqueue("vpu", WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
> +	if (!core->workqueue) {
> +		core_err(core, "fail to alloc workqueue\n");
> +		return -ENOMEM;
> +	}
> +	INIT_WORK(&core->msg_work, vpu_msg_run_work);
> +	INIT_DELAYED_WORK(&core->msg_delayed_work, vpu_msg_delayed_work);
> +	core->msg_buffer_size = roundup_pow_of_two(VPU_MSG_BUFFER_SIZE);
> +	core->msg_buffer = vzalloc(core->msg_buffer_size);
> +	if (!core->msg_buffer) {
> +		core_err(core, "failed allocate buffer for fifo\n");
> +		ret = -ENOMEM;
> +		goto error;
> +	}
> +	ret = kfifo_init(&core->msg_fifo, core->msg_buffer, core->msg_buffer_size);
> +	if (ret) {
> +		core_err(core, "failed init kfifo\n");
> +		goto error;
> +	}
> +
> +	list_add_tail(&core->list, &vpu->cores);
> +
> +	vpu_core_get_vpu(core);
> +
> +	if (core->type == VPU_CORE_TYPE_ENC && !vpu->vdev_enc)
> +		venc_create_video_device(vpu);
> +	if (core->type == VPU_CORE_TYPE_DEC && !vpu->vdev_dec)
> +		vdec_create_video_device(vpu);
> +
> +	return 0;
> +error:
> +	if (core->msg_buffer) {
> +		vfree(core->msg_buffer);
> +		core->msg_buffer = NULL;
> +	}
> +	if (core->workqueue) {
> +		destroy_workqueue(core->workqueue);
> +		core->workqueue = NULL;
> +	}
> +	return ret;
> +}
> +
> +static void vpu_core_put_vpu(struct vpu_core *core)
> +{
> +	if (core->type == VPU_CORE_TYPE_ENC)
> +		core->vpu->put_enc(core->vpu);
> +	if (core->type == VPU_CORE_TYPE_DEC)
> +		core->vpu->put_dec(core->vpu);
> +	core->vpu->put_vpu(core->vpu);
> +}
> +
> +static int vpu_core_unregister(struct device *dev, struct vpu_core *core)
> +{
> +	struct vpu_dev *vpu = dev_get_drvdata(dev);
> +
> +	list_del_init(&core->list);
> +
> +	vpu_core_put_vpu(core);
> +	core->vpu = NULL;
> +	vfree(core->msg_buffer);
> +	core->msg_buffer = NULL;
> +
> +	if (core->workqueue) {
> +		cancel_work_sync(&core->msg_work);
> +		cancel_delayed_work_sync(&core->msg_delayed_work);
> +		destroy_workqueue(core->workqueue);
> +		core->workqueue = NULL;
> +	}
> +
> +	if (vpu_core_find_next_by_type(vpu, core->type))
> +		return 0;
> +
> +	if (core->type == VPU_CORE_TYPE_ENC)
> +		video_unregister_device(vpu->vdev_enc);
> +	if (core->type == VPU_CORE_TYPE_DEC)
> +		video_unregister_device(vpu->vdev_dec);
> +
> +	return 0;
> +}
> +
> +static int vpu_core_acquire_instance(struct vpu_core *core)
> +{
> +	int id;
> +
> +	WARN_ON(!core);
> +
> +	id = ffz(core->instance_mask);
> +	if (id >= core->supported_instance_count)
> +		return -EINVAL;
> +
> +	set_bit(id, &core->instance_mask);
> +
> +	return id;
> +}
> +
> +static void vpu_core_release_instance(struct vpu_core *core, int id)
> +{
> +	WARN_ON(!core);
> +
> +	if (id < 0 || id >= core->supported_instance_count)
> +		return;
> +
> +	clear_bit(id, &core->instance_mask);
> +}
> +
> +struct vpu_inst *vpu_inst_get(struct vpu_inst *inst)
> +{
> +	if (!inst)
> +		return NULL;
> +
> +	atomic_inc(&inst->ref_count);
> +
> +	return inst;
> +}
> +
> +void vpu_inst_put(struct vpu_inst *inst)
> +{
> +	if (!inst)
> +		return;
> +	if (atomic_dec_and_test(&inst->ref_count)) {
> +		if (inst->release)
> +			inst->release(inst);
> +	}
> +}
> +
> +struct vpu_core *vpu_request_core(struct vpu_dev *vpu, enum vpu_core_type type)
> +{
> +	struct vpu_core *core = NULL;
> +	int ret;
> +
> +	mutex_lock(&vpu->lock);
> +
> +	core = vpu_core_find_proper_by_type(vpu, type);
> +	if (!core)
> +		goto exit;
> +
> +	core_dbg(core, LVL_DEBUG, "is found\n");
> +	mutex_lock(&core->lock);
> +	pm_runtime_get_sync(core->dev);
> +
> +	if (core->state == VPU_CORE_DEINIT) {
> +		ret = vpu_core_boot(core, true);
> +		if (ret) {
> +			pm_runtime_put_sync(core->dev);
> +			mutex_unlock(&core->lock);
> +			core = NULL;
> +			goto exit;
> +		}
> +		core->state = VPU_CORE_ACTIVE;
> +	}
> +
> +	core->request_count++;
> +
> +	mutex_unlock(&core->lock);
> +exit:
> +	mutex_unlock(&vpu->lock);
> +
> +	return core;
> +}
> +
> +void vpu_release_core(struct vpu_core *core)
> +{
> +	if (!core)
> +		return;
> +
> +	mutex_lock(&core->lock);
> +	pm_runtime_put_sync(core->dev);
> +	if (core->request_count)
> +		core->request_count--;
> +	mutex_unlock(&core->lock);
> +}
> +
> +int vpu_inst_register(struct vpu_inst *inst)
> +{
> +	struct vpu_core *core;
> +	int ret = 0;
> +
> +	WARN_ON(!inst || !inst->core);
> +
> +	core = inst->core;
> +	mutex_lock(&core->lock);
> +	if (inst->id >= 0 && inst->id < core->supported_instance_count)
> +		goto exit;
> +
> +	ret = vpu_core_acquire_instance(core);
> +	if (ret < 0)
> +		goto exit;
> +
> +	inst->id = ret;
> +	list_add_tail(&inst->list, &core->instances);
> +	ret = 0;
> +	if (core->res->act_size) {
> +		inst->act.phys = core->act.phys + core->res->act_size * inst->id;
> +		inst->act.virt = core->act.virt + core->res->act_size * inst->id;
> +		inst->act.length = core->res->act_size;
> +	}
> +	vpu_inst_create_dbgfs_file(inst);
> +exit:
> +	mutex_unlock(&core->lock);
> +
> +	if (ret)
> +		core_err(core, "register instance fail\n");
> +	return ret;
> +}
> +
> +int vpu_inst_unregister(struct vpu_inst *inst)
> +{
> +	struct vpu_core *core;
> +
> +	WARN_ON(!inst);
> +
> +	core = inst->core;
> +
> +	vpu_clear_request(inst);
> +	mutex_lock(&core->lock);
> +	if (inst->id >= 0 && inst->id < core->supported_instance_count) {
> +		vpu_inst_remove_dbgfs_file(inst);
> +		list_del_init(&inst->list);
> +		vpu_core_release_instance(core, inst->id);
> +		inst->id = VPU_INST_NULL_ID;
> +	}
> +	vpu_core_check_hang(core);
> +	if (core->state == VPU_CORE_HANG && !core->instance_mask) {
> +		core_dbg(core, LVL_WARN, "reset hang core\n");
> +		if (!vpu_core_sw_reset(core)) {
> +			core->state = VPU_CORE_ACTIVE;
> +			core->hang_mask = 0;
> +		}
> +	}
> +	mutex_unlock(&core->lock);
> +
> +	return 0;
> +}
> +
> +struct vpu_inst *vpu_core_find_instance(struct vpu_core *core, u32 index)
> +{
> +	struct vpu_inst *inst = NULL;
> +	struct vpu_inst *tmp;
> +
> +	mutex_lock(&core->lock);
> +	if (!test_bit(index, &core->instance_mask))
> +		goto exit;
> +	list_for_each_entry(tmp, &core->instances, list) {
> +		if (tmp->id == index) {
> +			inst = vpu_inst_get(tmp);
> +			break;
> +		}
> +	}
> +exit:
> +	mutex_unlock(&core->lock);
> +
> +	return inst;
> +}
> +
> +static int vpu_core_parse_dt(struct vpu_core *core, struct device_node *np)
> +{
> +	struct device_node *node;
> +	struct resource res;
> +
> +	if (of_count_phandle_with_args(np, "memory-region", NULL) < 2) {
> +		core_err(core, "need 2 memory-region for boot and rpc\n");
> +		return -ENODEV;
> +	}
> +
> +	node = of_parse_phandle(np, "memory-region", 0);
> +	if (!node) {
> +		core_err(core, "boot-region of_parse_phandle error\n");
> +		return -ENODEV;
> +	}
> +	if (of_address_to_resource(node, 0, &res)) {
> +		core_err(core, "boot-region of_address_to_resource error\n");
> +		return -EINVAL;
> +	}
> +	core->fw.phys = res.start;
> +	core->fw.length = resource_size(&res);
> +	core_dbg(core, LVL_INFO, "boot-region : <%pad, 0x%x>\n",
> +			&core->fw.phys, core->fw.length);
> +
> +	node = of_parse_phandle(np, "memory-region", 1);
> +	if (!node) {
> +		core_err(core, "rpc-region of_parse_phandle error\n");
> +		return -ENODEV;
> +	}
> +	if (of_address_to_resource(node, 0, &res)) {
> +		core_err(core, "rpc-region of_address_to_resource error\n");
> +		return -EINVAL;
> +	}
> +	core->rpc.phys = res.start;
> +	core->rpc.length = resource_size(&res);
> +	core_dbg(core, LVL_DEBUG, "rpc-region : <%pad, 0x%x>\n",
> +			&core->rpc.phys, core->rpc.length);
> +
> +	if (core->rpc.length < core->res->rpc_size + core->res->fwlog_size) {
> +		core_err(core, "the rpc-region <%pad, 0x%x> is not enough\n",
> +				&core->rpc.phys, core->rpc.length);
> +		return -EINVAL;
> +	}
> +
> +	core->fw.virt = ioremap_wc(core->fw.phys, core->fw.length);
> +	core->rpc.virt = ioremap_wc(core->rpc.phys, core->rpc.length);
> +	memset_io(core->rpc.virt, 0, core->rpc.length);
> +
> +	if (vpu_iface_check_memory_region(core,
> +				core->rpc.phys,
> +				core->rpc.length) != VPU_CORE_MEMORY_UNCACHED) {
> +		core_err(core, "rpc region<%pad, 0x%x> isn't uncached\n",
> +				&core->rpc.phys, core->rpc.length);
> +		return -EINVAL;
> +	}
> +
> +	core->log.phys = core->rpc.phys + core->res->rpc_size;
> +	core->log.virt = core->rpc.virt + core->res->rpc_size;
> +	core->log.length = core->res->fwlog_size;
> +	core->act.phys = core->log.phys + core->log.length;
> +	core->act.virt = core->log.virt + core->log.length;
> +	core->act.length = core->rpc.length - core->res->rpc_size - core->log.length;
> +	core->rpc.length = core->res->rpc_size;
> +
> +	return 0;
> +}
> +
> +static int vpu_core_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct vpu_core *core;
> +	struct vpu_dev *vpu = dev_get_drvdata(dev->parent);
> +	struct vpu_shared_addr *iface;
> +	u32 iface_data_size;
> +	int ret;
> +
> +	vpu_dbg(LVL_WARN, "core %s probe\n", pdev->dev.of_node->name);
> +	if (!vpu)
> +		return -EINVAL;
> +	core = devm_kzalloc(dev, sizeof(*core), GFP_KERNEL);
> +	if (!core)
> +		return -ENOMEM;
> +
> +	core->pdev = pdev;
> +	core->dev = dev;
> +	platform_set_drvdata(pdev, core);
> +	core->vpu = vpu;
> +	INIT_LIST_HEAD(&core->instances);
> +	mutex_init(&core->lock);
> +	mutex_init(&core->cmd_lock);
> +	init_completion(&core->cmp);
> +	init_waitqueue_head(&core->ack_wq);
> +	core->state = VPU_CORE_DEINIT;
> +
> +	core->res = of_device_get_match_data(dev);
> +	if (!core->res)
> +		return -ENODEV;
> +
> +	core->type = core->res->type;
> +	core->id = of_alias_get_id(dev->of_node, "vpu_core");
> +	if (core->id < 0) {
> +		vpu_err("can't get vpu core id\n");
> +		return core->id;
> +	}
> +	ret = vpu_core_parse_dt(core, dev->of_node);
> +	if (ret)
> +		return ret;
> +
> +	core->base = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(core->base))
> +		return PTR_ERR(core->base);
> +
> +	if (!vpu_iface_check_codec(core)) {
> +		core_err(core, "is not supported\n");
> +		return -EINVAL;
> +	}
> +
> +	ret = vpu_mbox_init(core);
> +	if (ret)
> +		return ret;
> +
> +	iface = devm_kzalloc(dev, sizeof(*iface), GFP_KERNEL);
> +	if (!iface)
> +		return -ENOMEM;
> +
> +	iface_data_size = vpu_iface_get_data_size(core);
> +	if (iface_data_size) {
> +		iface->priv = devm_kzalloc(dev, iface_data_size, GFP_KERNEL);
> +		if (!iface->priv)
> +			return -ENOMEM;
> +	}
> +
> +	ret = vpu_iface_init(core, iface, &core->rpc, core->fw.phys);
> +	if (ret) {
> +		core_err(core, "init iface fail, ret = %d\n", ret);
> +		return ret;
> +	}
> +
> +	vpu_iface_config_system(core, vpu->res->mreg_base, vpu->base);
> +	vpu_iface_set_log_buf(core, &core->log);
> +
> +	pm_runtime_enable(dev);
> +	ret = pm_runtime_get_sync(dev);
> +	if (ret) {
> +		pm_runtime_put_noidle(dev);
> +		pm_runtime_set_suspended(dev);
> +		goto err_runtime_disable;
> +	}
> +
> +	if (vpu_iface_get_power_state(core))
> +		ret = vpu_core_restore(core);
> +	if (ret)
> +		goto err_core_boot;
> +
> +	ret = vpu_core_register(dev->parent, core);
> +	if (ret)
> +		goto err_core_register;
> +	core->parent = dev->parent;
> +
> +	pm_runtime_put_sync(dev);
> +	vpu_core_create_dbgfs_file(core);
> +
> +	return 0;
> +
> +err_core_register:
> +	vpu_core_shutdown(core);
> +err_core_boot:
> +	pm_runtime_put_sync(dev);
> +err_runtime_disable:
> +	pm_runtime_disable(dev);
> +
> +	return ret;
> +}
> +
> +static int vpu_core_remove(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct vpu_core *core = platform_get_drvdata(pdev);
> +	int ret;
> +
> +	vpu_core_remove_dbgfs_file(core);

This crash when the module us unloaded.

[ 1051.198290] Unable to handle kernel NULL pointer dereference at virtual
address 00000000000000a0
[ 1051.207653] Mem abort info:
[ 1051.222130]   ESR = 0x96000004
[ 1051.227543]   EC = 0x25: DABT (current EL), IL = 32 bits
[ 1051.233354]   SET = 0, FnV = 0
[ 1051.236604]   EA = 0, S1PTW = 0
[ 1051.239837]   FSC = 0x04: level 0 translation fault
[ 1051.245175] Data abort info:
[ 1051.248480]   ISV = 0, ISS = 0x00000004
[ 1051.253606]   CM = 0, WnR = 0
[ 1051.257039] user pgtable: 4k pages, 48-bit VAs, pgdp=00000008826b4000
[ 1051.271756] [00000000000000a0] pgd=0000000000000000, p4d=0000000000000000
[ 1051.286908] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 1051.292536] Modules linked in: amphion_vpu_core(-) v4l2_mem2mem
videobuf2_vmalloc videobuf2_dma_contig videobuf2_memops videobuf2_v4l2
videobuf2_common crct10dif_ce imx_sc_wdt imx_sc_thermal imx_sc_key rtc_imx_sc
fsl_imx8_ddr_perf mpl3115 industrialio_triggered_buffer kfifo_buf isl29018
videodev mc drm fuse ip_tables x_tables ipv6 [last unloaded: amphion_vpu_dev]
[ 1051.324856] CPU: 0 PID: 491 Comm: rmmod Not tainted 5.15.0-rc2-imx8qxp+ #2
[ 1051.331748] Hardware name: Freescale i.MX8QXP MEK (DT)
[ 1051.336898] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 1051.343875] pc : down_read_interruptible+0xec/0x200
[ 1051.348772] lr : simple_recursive_removal+0x4c/0x29c
[ 1051.353752] sp : ffff80001302bbd0
[ 1051.357069] x29: ffff80001302bbd0 x28: ffff0008073d2300 x27: ffff0008073d2358
[ 1051.364229] x26: 0000000000000000 x25: 00000000000000a0 x24: 0000000000000000
[ 1051.371387] x23: ffff000800145090 x22: 0000000000000000 x21: ffff80001258ed3c
[ 1051.378545] x20: ffff80001258ed40 x19: ffff0008073d2300 x18: ffff800012573f54
[ 1051.385704] x17: 0000000000000000 x16: 000000000000000d x15: 0000104ca19aff10
[ 1051.392863] x14: 00000000000000ad x13: 0000000000000001 x12: 0000000000000000
[ 1051.400023] x11: 0000000000000000 x10: 0000000000000990 x9 : ffff80001302b860
[ 1051.407179] x8 : 0101010101010101 x7 : 7f7f7f7f7f7f7f7f x6 : 000000000000126e
[ 1051.414338] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 00000000000000a0
[ 1051.421496] x2 : 0000000000000001 x1 : 0000000000000000 x0 : 00000000000000a0
[ 1051.428659] Call trace:
[ 1051.431113]  down_read_interruptible+0xec/0x200
[ 1051.435655]  debugfs_remove+0x5c/0x80
[ 1051.439329]  vpu_core_remove_dbgfs_file+0x24/0x50 [amphion_vpu_core]
[ 1051.445734]  vpu_core_remove+0x24/0x150 [amphion_vpu_core]
[ 1051.451261]  platform_remove+0x2c/0x60
[ 1051.455028]  __device_release_driver+0x188/0x234
[ 1051.459659]  driver_detach+0xc4/0x150
[ 1051.463335]  bus_remove_driver+0x60/0xe0
[ 1051.467270]  driver_unregister+0x34/0x64
[ 1051.471204]  platform_driver_unregister+0x18/0x24
[ 1051.475922]  amphion_vpu_core_driver_exit+0x20/0x2c [amphion_vpu_core]
[ 1051.482494]  __arm64_sys_delete_module+0x194/0x25c
[ 1051.487303]  invoke_syscall+0x48/0x114
[ 1051.491063]  el0_svc_common.constprop.0+0x44/0xfc
[ 1051.495781]  do_el0_svc+0x2c/0x94
[ 1051.499107]  el0_svc+0x28/0x80
[ 1051.502176]  el0t_64_sync_handler+0xa8/0x130
[ 1051.506458]  el0t_64_sync+0x1a0/0x1a4
[ 1051.510141] Code: c8047c62 35ffff84 17fffe63 f9800071 (c85ffc60) 
[ 1051.516247] ---[ end trace 38710d42422128dc ]---


> +	ret = pm_runtime_get_sync(dev);
> +	WARN_ON(ret < 0);
> +
> +	vpu_core_shutdown(core);
> +	pm_runtime_put_sync(dev);
> +	pm_runtime_disable(dev);
> +
> +	vpu_core_unregister(core->parent, core);
> +	iounmap(core->fw.virt);
> +	iounmap(core->rpc.virt);
> +	mutex_destroy(&core->lock);
> +	mutex_destroy(&core->cmd_lock);
> +
> +	return 0;
> +}
> +
> +static int __maybe_unused vpu_core_runtime_resume(struct device *dev)
> +{
> +	struct vpu_core *core = dev_get_drvdata(dev);
> +
> +	return vpu_mbox_request(core);
> +}
> +
> +static int __maybe_unused vpu_core_runtime_suspend(struct device *dev)
> +{
> +	struct vpu_core *core = dev_get_drvdata(dev);
> +
> +	vpu_mbox_free(core);
> +	return 0;
> +}
> +
> +static void vpu_core_cancel_work(struct vpu_core *core)
> +{
> +	struct vpu_inst *inst = NULL;
> +
> +	cancel_work_sync(&core->msg_work);
> +	cancel_delayed_work_sync(&core->msg_delayed_work);
> +
> +	mutex_lock(&core->lock);
> +	list_for_each_entry(inst, &core->instances, list)
> +		cancel_work_sync(&inst->msg_work);
> +	mutex_unlock(&core->lock);
> +}
> +
> +static void vpu_core_resume_work(struct vpu_core *core)
> +{
> +	struct vpu_inst *inst = NULL;
> +	unsigned long delay = msecs_to_jiffies(10);
> +
> +	queue_work(core->workqueue, &core->msg_work);
> +	queue_delayed_work(core->workqueue, &core->msg_delayed_work, delay);
> +
> +	mutex_lock(&core->lock);
> +	list_for_each_entry(inst, &core->instances, list)
> +		queue_work(inst->workqueue, &inst->msg_work);
> +	mutex_unlock(&core->lock);
> +}
> +
> +static int __maybe_unused vpu_core_resume(struct device *dev)
> +{
> +	struct vpu_core *core = dev_get_drvdata(dev);
> +	int ret = 0;
> +
> +	if (!core->res->standalone)
> +		return 0;
> +
> +	mutex_lock(&core->lock);
> +	pm_runtime_get_sync(dev);
> +	vpu_core_get_vpu(core);
> +	if (core->state != VPU_CORE_SNAPSHOT)
> +		goto exit;
> +
> +	if (!vpu_iface_get_power_state(core)) {
> +		if (!list_empty(&core->instances)) {
> +			ret = vpu_core_boot(core, false);
> +			if (ret) {
> +				core_err(core, "%s boot fail\n", __func__);
> +				core->state = VPU_CORE_DEINIT;
> +				goto exit;
> +			}
> +			core->state = VPU_CORE_ACTIVE;
> +		} else {
> +			core->state = VPU_CORE_DEINIT;
> +		}
> +	} else {
> +		if (!list_empty(&core->instances)) {
> +			ret = vpu_core_sw_reset(core);
> +			if (ret) {
> +				core_err(core, "%s sw_reset fail\n", __func__);
> +				core->state = VPU_CORE_HANG;
> +				goto exit;
> +			}
> +		}
> +		core->state = VPU_CORE_ACTIVE;
> +	}
> +
> +exit:
> +	pm_runtime_put_sync(dev);
> +	mutex_unlock(&core->lock);
> +
> +	vpu_core_resume_work(core);
> +	return ret;
> +}
> +
> +static int __maybe_unused vpu_core_suspend(struct device *dev)
> +{
> +	struct vpu_core *core = dev_get_drvdata(dev);
> +	int ret = 0;
> +
> +	if (!core->res->standalone)
> +		return 0;
> +
> +	mutex_lock(&core->lock);
> +	if (core->state == VPU_CORE_ACTIVE) {
> +		if (!list_empty(&core->instances)) {
> +			ret = vpu_core_snapshot(core);
> +			if (ret) {
> +				mutex_unlock(&core->lock);
> +				return ret;
> +			}
> +		}
> +
> +		core->state = VPU_CORE_SNAPSHOT;
> +	}
> +	mutex_unlock(&core->lock);
> +
> +	vpu_core_cancel_work(core);
> +
> +	mutex_lock(&core->lock);
> +	vpu_core_put_vpu(core);
> +	mutex_unlock(&core->lock);
> +	return ret;
> +}
> +
> +static const struct dev_pm_ops vpu_core_pm_ops = {
> +	SET_RUNTIME_PM_OPS(vpu_core_runtime_suspend, vpu_core_runtime_resume, NULL)
> +	SET_SYSTEM_SLEEP_PM_OPS(vpu_core_suspend, vpu_core_resume)
> +};
> +
> +static struct vpu_core_resources imx8q_enc = {
> +	.type = VPU_CORE_TYPE_ENC,
> +	.fwname = "vpu/vpu_fw_imx8_enc.bin",
> +	.stride = 16,
> +	.max_width = 1920,
> +	.max_height = 1920,
> +	.min_width = 64,
> +	.min_height = 48,
> +	.step_width = 2,
> +	.step_height = 2,
> +	.rpc_size = 0x80000,
> +	.fwlog_size = 0x80000,
> +	.act_size = 0xc0000,
> +	.standalone = true,
> +};
> +
> +static struct vpu_core_resources imx8q_dec = {
> +	.type = VPU_CORE_TYPE_DEC,
> +	.fwname = "vpu/vpu_fw_imx8_dec.bin",
> +	.stride = 256,
> +	.max_width = 8188,
> +	.max_height = 8188,
> +	.min_width = 16,
> +	.min_height = 16,
> +	.step_width = 1,
> +	.step_height = 1,
> +	.rpc_size = 0x80000,
> +	.fwlog_size = 0x80000,
> +	.standalone = true,
> +};
> +
> +static const struct of_device_id vpu_core_dt_match[] = {
> +	{ .compatible = "nxp,imx8q-vpu-encoder", .data = &imx8q_enc },
> +	{ .compatible = "nxp,imx8q-vpu-decoder", .data = &imx8q_dec },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, vpu_core_dt_match);
> +
> +static struct platform_driver amphion_vpu_core_driver = {
> +	.probe = vpu_core_probe,
> +	.remove = vpu_core_remove,
> +	.driver = {
> +		.name = "amphion-vpu-core",
> +		.of_match_table = vpu_core_dt_match,
> +		.pm = &vpu_core_pm_ops,
> +	},
> +};
> +module_platform_driver(amphion_vpu_core_driver);
> +
> +MODULE_AUTHOR("Freescale Semiconductor, Inc.");
> +MODULE_DESCRIPTION("Linux VPU driver for Freescale i.MX8Q");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/media/platform/amphion/vpu_core.h b/drivers/media/platform/amphion/vpu_core.h
> new file mode 100644
> index 000000000000..12880e2e14b2
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_core.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#ifndef _AMPHION_VPU_CORE_H
> +#define _AMPHION_VPU_CORE_H
> +
> +void csr_writel(struct vpu_core *core, u32 reg, u32 val);
> +u32 csr_readl(struct vpu_core *core, u32 reg);
> +int vpu_alloc_dma(struct vpu_core *core, struct vpu_buffer *buf);
> +void vpu_free_dma(struct vpu_buffer *buf);
> +struct vpu_inst *vpu_core_find_instance(struct vpu_core *core, u32 index);
> +int vpu_core_check_fmt(struct vpu_core *core, u32 pixelfmt);
> +
> +#endif
> diff --git a/drivers/media/platform/amphion/vpu_dbg.c b/drivers/media/platform/amphion/vpu_dbg.c
> new file mode 100644
> index 000000000000..4dbfbd6d2f46
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_dbg.c
> @@ -0,0 +1,496 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#define TAG		"DEBUG"
> +
> +#include <linux/init.h>
> +#include <linux/device.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/types.h>
> +#include <linux/pm_runtime.h>
> +#include <media/v4l2-device.h>
> +#include <linux/debugfs.h>
> +#include "vpu.h"
> +#include "vpu_defs.h"
> +#include "vpu_helpers.h"
> +#include "vpu_cmds.h"
> +#include "vpu_rpc.h"
> +#include "vpu_log.h"
> +
> +struct print_buf_desc {
> +	u32 start_h_phy;
> +	u32 start_h_vir;
> +	u32 start_m;
> +	u32 bytes;
> +	u32 read;
> +	u32 write;
> +	char buffer[0];
> +};
> +
> +static char *vb2_stat_name[] = {
> +	[VB2_BUF_STATE_DEQUEUED] = "dequeued",
> +	[VB2_BUF_STATE_IN_REQUEST] = "in_request",
> +	[VB2_BUF_STATE_PREPARING] = "preparing",
> +	[VB2_BUF_STATE_QUEUED] = "queued",
> +	[VB2_BUF_STATE_ACTIVE] = "active",
> +	[VB2_BUF_STATE_DONE] = "done",
> +	[VB2_BUF_STATE_ERROR] = "error",
> +};
> +
> +static char *vpu_stat_name[] = {
> +	[VPU_BUF_STATE_IDLE] = "idle",
> +	[VPU_BUF_STATE_INUSE] = "inuse",
> +	[VPU_BUF_STATE_DECODED] = "decoded",
> +	[VPU_BUF_STATE_READY] = "ready",
> +	[VPU_BUF_STATE_SKIP] = "skip",
> +	[VPU_BUF_STATE_ERROR] = "error",
> +};
> +
> +static int vpu_dbg_instance(struct seq_file *s, void *data)
> +{
> +	struct vpu_inst *inst = s->private;
> +	char str[128];
> +	int num;
> +	struct vb2_queue *vq;
> +	int i;
> +
> +	num = scnprintf(str, sizeof(str), "[%s]\n", vpu_core_type_desc(inst->type));
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	num = scnprintf(str, sizeof(str), "tgig = %d,pid = %d\n", inst->tgid, inst->pid);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "state = %d\n", inst->state);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str),
> +			"min_buffer_out = %d, min_buffer_cap = %d\n",
> +			inst->min_buffer_out, inst->min_buffer_cap);
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +
> +	vq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> +	num = scnprintf(str, sizeof(str),
> +			"output(%d) : fmt = %c%c%c%c %d x %d, %d;",
> +			vb2_is_streaming(vq),
> +			inst->out_format.pixfmt,
> +			inst->out_format.pixfmt >> 8,
> +			inst->out_format.pixfmt >> 16,
> +			inst->out_format.pixfmt >> 24,
> +			inst->out_format.width,
> +			inst->out_format.height,
> +			vq->last_buffer_dequeued);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	for (i = 0; i < inst->out_format.num_planes; i++) {
> +		num = scnprintf(str, sizeof(str), " %d(%d)",
> +				inst->out_format.sizeimage[i],
> +				inst->out_format.bytesperline[i]);
> +		if (seq_write(s, str, num))
> +			return 0;
> +	}
> +	if (seq_write(s, "\n", 1))
> +		return 0;
> +
> +	vq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> +	num = scnprintf(str, sizeof(str),
> +			"capture(%d): fmt = %c%c%c%c %d x %d, %d;",
> +			vb2_is_streaming(vq),
> +			inst->cap_format.pixfmt,
> +			inst->cap_format.pixfmt >> 8,
> +			inst->cap_format.pixfmt >> 16,
> +			inst->cap_format.pixfmt >> 24,
> +			inst->cap_format.width,
> +			inst->cap_format.height,
> +			vq->last_buffer_dequeued);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	for (i = 0; i < inst->cap_format.num_planes; i++) {
> +		num = scnprintf(str, sizeof(str), " %d(%d)",
> +				inst->cap_format.sizeimage[i],
> +				inst->cap_format.bytesperline[i]);
> +		if (seq_write(s, str, num))
> +			return 0;
> +	}
> +	if (seq_write(s, "\n", 1))
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "crop: (%d, %d) %d x %d\n",
> +			inst->crop.left,
> +			inst->crop.top,
> +			inst->crop.width,
> +			inst->crop.height);
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	vq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> +	for (i = 0; i < vq->num_buffers; i++) {
> +		struct vb2_buffer *vb = vq->bufs[i];
> +		struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +		struct vpu_vb2_buffer *vpu_buf = to_vpu_vb2_buffer(vbuf);
> +
> +		if (vb->state == VB2_BUF_STATE_DEQUEUED)
> +			continue;
> +		num = scnprintf(str, sizeof(str),
> +				"output [%2d] state = %10s, %8s\n",
> +				i, vb2_stat_name[vb->state],
> +				vpu_stat_name[vpu_buf->state]);
> +		if (seq_write(s, str, num))
> +			return 0;
> +	}
> +
> +	vq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> +	for (i = 0; i < vq->num_buffers; i++) {
> +		struct vb2_buffer *vb = vq->bufs[i];
> +		struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +		struct vpu_vb2_buffer *vpu_buf = to_vpu_vb2_buffer(vbuf);
> +
> +		if (vb->state == VB2_BUF_STATE_DEQUEUED)
> +			continue;
> +		num = scnprintf(str, sizeof(str),
> +				"capture[%2d] state = %10s, %8s\n",
> +				i, vb2_stat_name[vb->state],
> +				vpu_stat_name[vpu_buf->state]);
> +		if (seq_write(s, str, num))
> +			return 0;
> +	}
> +
> +	num = scnprintf(str, sizeof(str), "sequence = %d\n", inst->sequence);
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	if (inst->use_stream_buffer) {
> +		num = scnprintf(str, sizeof(str), "stream_buffer = %d / %d, <%pad, 0x%x>\n",
> +				vpu_helper_get_used_space(inst),
> +				inst->stream_buffer.length,
> +				&inst->stream_buffer.phys,
> +				inst->stream_buffer.length);
> +		if (seq_write(s, str, num))
> +			return 0;
> +	}
> +	num = scnprintf(str, sizeof(str), "kfifo len = 0x%x\n", kfifo_len(&inst->msg_fifo));
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	num = scnprintf(str, sizeof(str), "flow :\n");
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	mutex_lock(&inst->core->cmd_lock);
> +	for (i = 0; i < ARRAY_SIZE(inst->flows); i++) {
> +		u32 idx = (inst->flow_idx + i) % (ARRAY_SIZE(inst->flows));
> +
> +		if (!inst->flows[idx])
> +			continue;
> +		num = scnprintf(str, sizeof(str), "\t[%s]0x%x\n",
> +				inst->flows[idx] >= VPU_MSG_ID_NOOP ? "M" : "C",
> +				inst->flows[idx]);
> +		if (seq_write(s, str, num)) {
> +			mutex_unlock(&inst->core->cmd_lock);
> +			return 0;
> +		}
> +	}
> +	mutex_unlock(&inst->core->cmd_lock);
> +
> +	i = 0;
> +	while (true) {
> +		num = call_vop(inst, get_debug_info, str, sizeof(str), i++);
> +		if (num <= 0)
> +			break;
> +		if (seq_write(s, str, num))
> +			return 0;
> +	}
> +
> +	return 0;
> +}
> +
> +static int vpu_dbg_core(struct seq_file *s, void *data)
> +{
> +	struct vpu_core *core = s->private;
> +	struct vpu_shared_addr *iface = core->iface;
> +	char str[128];
> +	int num;
> +
> +	num = scnprintf(str, sizeof(str), "[%s]\n", vpu_core_type_desc(core->type));
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	num = scnprintf(str, sizeof(str), "boot_region  = <%pad, 0x%x>\n",
> +			&core->fw.phys, core->fw.length);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "rpc_region   = <%pad, 0x%x> used = 0x%x\n",
> +			&core->rpc.phys, core->rpc.length, core->rpc.bytesused);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "fwlog_region = <%pad, 0x%x>\n",
> +			&core->log.phys, core->log.length);
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	num = scnprintf(str, sizeof(str), "state = %d\n", core->state);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	if (core->state == VPU_CORE_DEINIT)
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "fw version = %d.%d.%d\n",
> +				(core->fw_version >> 16) & 0xff,
> +				(core->fw_version >> 8) & 0xff,
> +				core->fw_version & 0xff);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "instances = %d/%d (0x%02lx), %d\n",
> +			hweight32(core->instance_mask),
> +			core->supported_instance_count,
> +			core->instance_mask,
> +			core->request_count);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str), "kfifo len = 0x%x\n", kfifo_len(&core->msg_fifo));
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str),
> +			"cmd_buf:[0x%x, 0x%x], wptr = 0x%x, rptr = 0x%x\n",
> +			iface->cmd_desc->start,
> +			iface->cmd_desc->end,
> +			iface->cmd_desc->wptr,
> +			iface->cmd_desc->rptr);
> +	if (seq_write(s, str, num))
> +		return 0;
> +	num = scnprintf(str, sizeof(str),
> +			"msg_buf:[0x%x, 0x%x], wptr = 0x%x, rptr = 0x%x\n",
> +			iface->msg_desc->start,
> +			iface->msg_desc->end,
> +			iface->msg_desc->wptr,
> +			iface->msg_desc->rptr);
> +	if (seq_write(s, str, num))
> +		return 0;
> +
> +	return 0;
> +}
> +
> +static int vpu_dbg_fwlog(struct seq_file *s, void *data)
> +{
> +	struct vpu_core *core = s->private;
> +	struct print_buf_desc *print_buf;
> +	int length;
> +	u32 rptr;
> +	u32 wptr;
> +	int ret = 0;
> +
> +	if (!core->log.virt || core->state == VPU_CORE_DEINIT)
> +		return 0;
> +
> +	print_buf = core->log.virt;
> +	rptr = print_buf->read;
> +	wptr = print_buf->write;
> +
> +	if (rptr == wptr)
> +		return 0;
> +	else if (rptr < wptr)
> +		length = wptr - rptr;
> +	else
> +		length = print_buf->bytes + wptr - rptr;
> +
> +	if (s->count + length >= s->size) {
> +		s->count = s->size;
> +		return 0;
> +	}
> +
> +	if (rptr + length >= print_buf->bytes) {
> +		int num = print_buf->bytes - rptr;
> +
> +		if (seq_write(s, print_buf->buffer + rptr, num))
> +			ret = -1;
> +		length -= num;
> +		rptr = 0;
> +	}
> +
> +	if (length) {
> +		if (seq_write(s, print_buf->buffer + rptr, length))
> +			ret = -1;
> +		rptr += length;
> +	}
> +	if (!ret)
> +		print_buf->read = rptr;
> +
> +	return 0;
> +}
> +
> +static int vpu_dbg_inst_open(struct inode *inode, struct file *filp)
> +{
> +	return single_open(filp, vpu_dbg_instance, inode->i_private);
> +}
> +
> +static ssize_t vpu_dbg_inst_write(struct file *file,
> +			const char __user *user_buf, size_t size, loff_t *ppos)
> +{
> +	struct seq_file *s = file->private_data;
> +	struct vpu_inst *inst = s->private;
> +
> +	vpu_session_debug(inst);
> +
> +	return size;
> +}
> +
> +static ssize_t vpu_dbg_core_write(struct file *file,
> +			const char __user *user_buf, size_t size, loff_t *ppos)
> +{
> +	struct seq_file *s = file->private_data;
> +	struct vpu_core *core = s->private;
> +
> +	pm_runtime_get_sync(core->dev);
> +	mutex_lock(&core->lock);
> +	if (core->state != VPU_CORE_DEINIT && !core->instance_mask) {
> +		core_dbg(core, LVL_INFO, "reset core\n");
> +		if (!vpu_core_sw_reset(core)) {
> +			core->state = VPU_CORE_ACTIVE;
> +			core->hang_mask = 0;
> +		}
> +	}
> +	mutex_unlock(&core->lock);
> +	pm_runtime_put_sync(core->dev);
> +
> +	return size;
> +}
> +
> +static int vpu_dbg_core_open(struct inode *inode, struct file *filp)
> +{
> +	return single_open(filp, vpu_dbg_core, inode->i_private);
> +}
> +
> +static int vpu_dbg_fwlog_open(struct inode *inode, struct file *filp)
> +{
> +	return single_open(filp, vpu_dbg_fwlog, inode->i_private);
> +}
> +
> +static const struct file_operations vpu_dbg_inst_fops = {
> +	.owner = THIS_MODULE,
> +	.open = vpu_dbg_inst_open,
> +	.release = single_release,
> +	.read = seq_read,
> +	.write = vpu_dbg_inst_write,
> +};
> +
> +static const struct file_operations vpu_dbg_core_fops = {
> +	.owner = THIS_MODULE,
> +	.open = vpu_dbg_core_open,
> +	.release = single_release,
> +	.read = seq_read,
> +	.write = vpu_dbg_core_write,
> +};
> +
> +static const struct file_operations vpu_dbg_fwlog_fops = {
> +	.owner = THIS_MODULE,
> +	.open = vpu_dbg_fwlog_open,
> +	.release = single_release,
> +	.read = seq_read,
> +};
> +
> +int vpu_inst_create_dbgfs_file(struct vpu_inst *inst)
> +{
> +	struct vpu_dev *vpu;
> +	char name[64];
> +
> +	if (!inst || !inst->core || !inst->core->vpu)
> +		return -EINVAL;
> +
> +	vpu = inst->core->vpu;
> +	if (!vpu->debugfs)
> +		return -EINVAL;
> +
> +	if (inst->debugfs)
> +		return 0;
> +
> +	scnprintf(name, sizeof(name), "instance.%d.%d",
> +			inst->core->id, inst->id);
> +	inst->debugfs = debugfs_create_file((const char *)name,
> +				VERIFY_OCTAL_PERMISSIONS(0644),
> +				vpu->debugfs,
> +				inst,
> +				&vpu_dbg_inst_fops);
> +	if (!inst->debugfs) {
> +		vpu_err("vpu create debugfs %s fail\n", name);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +int vpu_inst_remove_dbgfs_file(struct vpu_inst *inst)
> +{
> +	if (!inst)
> +		return 0;
> +
> +	debugfs_remove(inst->debugfs);
> +	inst->debugfs = NULL;
> +
> +	return 0;
> +}
> +
> +int vpu_core_create_dbgfs_file(struct vpu_core *core)
> +{
> +	struct vpu_dev *vpu;
> +	char name[64];
> +
> +	if (!core || !core->vpu)
> +		return -EINVAL;
> +
> +	vpu = core->vpu;
> +	if (!vpu->debugfs)
> +		return -EINVAL;
> +
> +	if (!core->debugfs) {
> +		scnprintf(name, sizeof(name), "core.%d", core->id);
> +		core->debugfs = debugfs_create_file((const char *)name,
> +					VERIFY_OCTAL_PERMISSIONS(0644),
> +					vpu->debugfs,
> +					core,
> +					&vpu_dbg_core_fops);
> +		if (!core->debugfs) {
> +			vpu_err("vpu create debugfs %s fail\n", name);
> +			return -EINVAL;
> +		}
> +	}
> +	if (!core->debugfs_fwlog) {
> +		scnprintf(name, sizeof(name), "fwlog.%d", core->id);
> +		core->debugfs_fwlog = debugfs_create_file((const char *)name,
> +					VERIFY_OCTAL_PERMISSIONS(0444),
> +					vpu->debugfs,
> +					core,
> +					&vpu_dbg_fwlog_fops);
> +		if (!core->debugfs_fwlog) {
> +			vpu_err("vpu create debugfs %s fail\n", name);
> +			return -EINVAL;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +int vpu_core_remove_dbgfs_file(struct vpu_core *core)
> +{
> +	if (!core)
> +		return 0;
> +	debugfs_remove(core->debugfs);
> +	core->debugfs = NULL;
> +	debugfs_remove(core->debugfs_fwlog);
> +	core->debugfs_fwlog = NULL;
> +
> +	return 0;
> +}
> +
> +void vpu_inst_record_flow(struct vpu_inst *inst, u32 flow)
> +{
> +	if (!inst)
> +		return;
> +
> +	inst->flows[inst->flow_idx] = flow;
> +	inst->flow_idx = (inst->flow_idx + 1) % (ARRAY_SIZE(inst->flows));
> +}
> diff --git a/drivers/media/platform/amphion/vpu_log.h b/drivers/media/platform/amphion/vpu_log.h
> new file mode 100644
> index 000000000000..fec98368fad1
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_log.h
> @@ -0,0 +1,44 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#ifndef _AMPHION_VPU_LOG_H
> +#define _AMPHION_VPU_LOG_H
> +
> +#define LVL_ERR		(1 << 0)
> +#define LVL_WARN	(1 << 1)
> +#define LVL_INFO	(1 << 2)
> +#define LVL_DEBUG	(1 << 3)
> +#define LVL_IRQ		(1 << 4)
> +#define LVL_CMD		(1 << 5)
> +#define LVL_EVT		(1 << 6)
> +#define LVL_CTRL	(1 << 7)
> +#define LVL_TS		(1 << 8)
> +#define LVL_FLOW	(1 << 13)
> +
> +extern unsigned int vpu_dbg_level;
> +
> +#ifdef TAG
> +#define vpu_dbg(level, fmt, arg...) \
> +	do { \
> +		if ((vpu_dbg_level & (level)) || ((level) & LVL_ERR)) \
> +			pr_info("[VPU "TAG"]"fmt, ## arg); \
> +	} while (0)
> +#else
> +#define vpu_dbg(level, fmt, arg...) \
> +	do { \
> +		if ((vpu_dbg_level & (level)) || ((level) & LVL_ERR)) \
> +			pr_info("[VPU]"fmt, ## arg); \
> +	} while (0)
> +#endif
> +
> +#define vpu_err(fmt, arg...)	vpu_dbg(LVL_ERR, fmt, ##arg)
> +#define inst_dbg(inst, level, fmt, arg...)		\
> +		vpu_dbg(level, "[%d:%d] "fmt, inst->core->id, inst->id, ## arg)
> +#define inst_err(inst, fmt, arg...)	inst_dbg(inst, LVL_ERR, fmt, ## arg)
> +#define core_dbg(core, level, fmt, arg...)		\
> +		vpu_dbg(level, "[%d] %s "fmt, core->id, vpu_core_type_desc(core->type), ## arg)
> +#define core_err(core, fmt, arg...)	core_dbg(core, LVL_ERR, fmt, ## arg)
> +
> +#endif
> diff --git a/drivers/media/platform/amphion/vpu_rpc.c b/drivers/media/platform/amphion/vpu_rpc.c
> new file mode 100644
> index 000000000000..21c95b20d48d
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_rpc.c
> @@ -0,0 +1,263 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#define TAG		"RPC"
> +#include <linux/init.h>
> +#include <linux/interconnect.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/of_address.h>
> +#include <linux/platform_device.h>
> +#include <linux/firmware/imx/ipc.h>
> +#include <linux/firmware/imx/svc/misc.h>
> +#include "vpu.h"
> +#include "vpu_rpc.h"
> +#include "vpu_imx8q.h"
> +#include "vpu_windsor.h"
> +#include "vpu_malone.h"
> +#include "vpu_log.h"
> +
> +u32 vpu_iface_check_memory_region(struct vpu_core *core, dma_addr_t addr, u32 size)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->check_memory_region)
> +		return VPU_CORE_MEMORY_INVALID;
> +
> +	return ops->check_memory_region(core->fw.phys, addr, size);
> +}
> +
> +static u32 vpu_rpc_check_buffer_space(struct vpu_rpc_buffer_desc *desc, bool write)
> +{
> +	u32 ptr1;
> +	u32 ptr2;
> +	u32 size;
> +
> +	WARN_ON(!desc);
> +
> +	size = desc->end - desc->start;
> +	if (write) {
> +		ptr1 = desc->wptr;
> +		ptr2 = desc->rptr;
> +	} else {
> +		ptr1 = desc->rptr;
> +		ptr2 = desc->wptr;
> +	}
> +
> +	if (ptr1 == ptr2) {
> +		if (!write)
> +			return 0;
> +		else
> +			return size;
> +	}
> +
> +	return (ptr2 + size - ptr1) % size;
> +}
> +
> +static int vpu_rpc_send_cmd_buf(struct vpu_shared_addr *shared,
> +			struct vpu_rpc_event *cmd)
> +{
> +	struct vpu_rpc_buffer_desc *desc;
> +	u32 space = 0;
> +	u32 *data;
> +	u32 wptr;
> +	u32 i;
> +
> +	WARN_ON(!shared || !shared->cmd_mem_vir || !cmd);
> +
> +	desc = shared->cmd_desc;
> +	space = vpu_rpc_check_buffer_space(desc, true);
> +	if (space < (((cmd->hdr.num + 1) << 2) + 16)) {
> +		vpu_err("Cmd Buffer is no space for [%d] %d\n",
> +				cmd->hdr.index, cmd->hdr.id);
> +		return -EINVAL;
> +	}
> +	wptr = desc->wptr;
> +	data = (u32 *)(shared->cmd_mem_vir + desc->wptr - desc->start);
> +	*data = 0;
> +	*data |= ((cmd->hdr.index & 0xff) << 24);
> +	*data |= ((cmd->hdr.num & 0xff) << 16);
> +	*data |= (cmd->hdr.id & 0x3fff);
> +	wptr += 4;
> +	data++;
> +	if (wptr >= desc->end) {
> +		wptr = desc->start;
> +		data = shared->cmd_mem_vir;
> +	}
> +
> +	for (i = 0; i < cmd->hdr.num; i++) {
> +		*data = cmd->data[i];
> +		wptr += 4;
> +		data++;
> +		if (wptr >= desc->end) {
> +			wptr = desc->start;
> +			data = shared->cmd_mem_vir;
> +		}
> +	}
> +
> +	/*update wptr after data is written*/
> +	mb();
> +	desc->wptr = wptr;
> +
> +	return 0;
> +}
> +
> +static bool vpu_rpc_check_msg(struct vpu_shared_addr *shared)
> +{
> +	struct vpu_rpc_buffer_desc *desc;
> +	u32 space = 0;
> +	u32 msgword;
> +	u32 msgnum;
> +
> +	WARN_ON(!shared || !shared->msg_desc);
> +
> +	desc = shared->msg_desc;
> +	space = vpu_rpc_check_buffer_space(desc, 0);
> +	space = (space >> 2);
> +
> +	if (space) {
> +		msgword = *(u32 *)(shared->msg_mem_vir + desc->rptr - desc->start);
> +		msgnum = (msgword & 0xff0000) >> 16;
> +		if (msgnum <= space)
> +			return true;
> +	}
> +
> +	return false;
> +}
> +
> +static int vpu_rpc_receive_msg_buf(struct vpu_shared_addr *shared, struct vpu_rpc_event *msg)
> +{
> +	struct vpu_rpc_buffer_desc *desc;
> +	u32 *data;
> +	u32 msgword;
> +	u32 rptr;
> +	u32 i;
> +
> +	WARN_ON(!shared || !shared->msg_desc || !msg);
> +
> +	if (!vpu_rpc_check_msg(shared))
> +		return -EINVAL;
> +
> +	desc = shared->msg_desc;
> +	data = (u32 *)(shared->msg_mem_vir + desc->rptr - desc->start);
> +	rptr = desc->rptr;
> +	msgword = *data;
> +	data++;
> +	rptr += 4;
> +	if (rptr >= desc->end) {
> +		rptr = desc->start;
> +		data = shared->msg_mem_vir;
> +	}
> +
> +	msg->hdr.index = (msgword >> 24) & 0xff;
> +	msg->hdr.num = (msgword >> 16) & 0xff;
> +	msg->hdr.id = msgword & 0x3fff;
> +
> +	if (msg->hdr.num > ARRAY_SIZE(msg->data)) {
> +		vpu_err("msg(%d) data length(%d) is out of range\n",
> +				msg->hdr.id, msg->hdr.num);
> +		return -EINVAL;
> +	}
> +
> +	for (i = 0; i < msg->hdr.num; i++) {
> +		msg->data[i] = *data;
> +		data++;
> +		rptr += 4;
> +		if (rptr >= desc->end) {
> +			rptr = desc->start;
> +			data = shared->msg_mem_vir;
> +		}
> +	}
> +
> +	/*update rptr after data is read*/
> +	mb();
> +	desc->rptr = rptr;
> +
> +	return 0;
> +}
> +
> +struct vpu_iface_ops imx8q_rpc_ops[] = {
> +	[VPU_CORE_TYPE_ENC] = {
> +		.check_codec = vpu_imx8q_check_codec,
> +		.check_fmt = vpu_imx8q_check_fmt,
> +		.boot_core = vpu_imx8q_boot_core,
> +		.get_power_state = vpu_imx8q_get_power_state,
> +		.on_firmware_loaded = vpu_imx8q_on_firmware_loaded,
> +		.get_data_size = vpu_windsor_get_data_size,
> +		.check_memory_region = vpu_imx8q_check_memory_region,
> +		.init_rpc = vpu_windsor_init_rpc,
> +		.set_log_buf = vpu_windsor_set_log_buf,
> +		.set_system_cfg = vpu_windsor_set_system_cfg,
> +		.get_version = vpu_windsor_get_version,
> +		.send_cmd_buf = vpu_rpc_send_cmd_buf,
> +		.receive_msg_buf = vpu_rpc_receive_msg_buf,
> +		.pack_cmd = vpu_windsor_pack_cmd,
> +		.convert_msg_id = vpu_windsor_convert_msg_id,
> +		.unpack_msg_data = vpu_windsor_unpack_msg_data,
> +		.config_memory_resource = vpu_windsor_config_memory_resource,
> +		.get_stream_buffer_size = vpu_windsor_get_stream_buffer_size,
> +		.config_stream_buffer = vpu_windsor_config_stream_buffer,
> +		.get_stream_buffer_desc = vpu_windsor_get_stream_buffer_desc,
> +		.update_stream_buffer = vpu_windsor_update_stream_buffer,
> +		.set_encode_params = vpu_windsor_set_encode_params,
> +		.input_frame = vpu_windsor_input_frame,
> +		.get_max_instance_count = vpu_windsor_get_max_instance_count,
> +	},
> +	[VPU_CORE_TYPE_DEC] = {
> +		.check_codec = vpu_imx8q_check_codec,
> +		.check_fmt = vpu_imx8q_check_fmt,
> +		.boot_core = vpu_imx8q_boot_core,
> +		.get_power_state = vpu_imx8q_get_power_state,
> +		.on_firmware_loaded = vpu_imx8q_on_firmware_loaded,
> +		.get_data_size = vpu_malone_get_data_size,
> +		.check_memory_region = vpu_imx8q_check_memory_region,
> +		.init_rpc = vpu_malone_init_rpc,
> +		.set_log_buf = vpu_malone_set_log_buf,
> +		.set_system_cfg = vpu_malone_set_system_cfg,
> +		.get_version = vpu_malone_get_version,
> +		.send_cmd_buf = vpu_rpc_send_cmd_buf,
> +		.receive_msg_buf = vpu_rpc_receive_msg_buf,
> +		.get_stream_buffer_size = vpu_malone_get_stream_buffer_size,
> +		.config_stream_buffer = vpu_malone_config_stream_buffer,
> +		.set_decode_params = vpu_malone_set_decode_params,
> +		.pack_cmd = vpu_malone_pack_cmd,
> +		.convert_msg_id = vpu_malone_convert_msg_id,
> +		.unpack_msg_data = vpu_malone_unpack_msg_data,
> +		.get_stream_buffer_desc = vpu_malone_get_stream_buffer_desc,
> +		.update_stream_buffer = vpu_malone_update_stream_buffer,
> +		.add_scode = vpu_malone_add_scode,
> +		.input_frame = vpu_malone_input_frame,
> +		.pre_send_cmd = vpu_malone_pre_cmd,
> +		.post_send_cmd = vpu_malone_post_cmd,
> +		.init_instance = vpu_malone_init_instance,
> +		.get_max_instance_count = vpu_malone_get_max_instance_count,
> +	},
> +};
> +
> +struct vpu_iface_ops *vpu_iface_get(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *rpc_ops = NULL;
> +	u32 size = 0;
> +
> +	WARN_ON(!core || !core->vpu || !core->vpu->res);
> +
> +	switch (core->vpu->res->plat_type) {
> +	case IMX8QXP:
> +	case IMX8QM:
> +		rpc_ops = imx8q_rpc_ops;
> +		size = ARRAY_SIZE(imx8q_rpc_ops);
> +		break;
> +	default:
> +		return NULL;
> +	}
> +
> +	if (core->type >= size)
> +		return NULL;
> +
> +	return &rpc_ops[core->type];
> +}
> diff --git a/drivers/media/platform/amphion/vpu_rpc.h b/drivers/media/platform/amphion/vpu_rpc.h
> new file mode 100644
> index 000000000000..b066a83e67d3
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_rpc.h
> @@ -0,0 +1,463 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#ifndef _AMPHION_VPU_RPC_H
> +#define _AMPHION_VPU_RPC_H
> +
> +#include <media/videobuf2-core.h>
> +#include "vpu_codec.h"
> +
> +struct vpu_rpc_buffer_desc {
> +	u32 wptr;
> +	u32 rptr;
> +	u32 start;
> +	u32 end;
> +};
> +
> +struct vpu_shared_addr {
> +	void *iface;
> +	struct vpu_rpc_buffer_desc *cmd_desc;
> +	void *cmd_mem_vir;
> +	struct vpu_rpc_buffer_desc *msg_desc;
> +	void *msg_mem_vir;
> +
> +	unsigned long boot_addr;
> +	struct vpu_core *core;
> +	void *priv;
> +};
> +
> +struct vpu_rpc_event_header {
> +	u32 index;
> +	u32 id;
> +	u32 num;
> +};
> +
> +struct vpu_rpc_event {
> +	struct vpu_rpc_event_header hdr;
> +	u32 data[128];
> +};
> +
> +struct vpu_iface_ops {
> +	bool (*check_codec)(enum vpu_core_type type);
> +	bool (*check_fmt)(enum vpu_core_type type, u32 pixelfmt);
> +	u32 (*get_data_size)(void);
> +	u32 (*check_memory_region)(dma_addr_t base, dma_addr_t addr, u32 size);
> +	int (*boot_core)(struct vpu_core *core);
> +	int (*shutdown_core)(struct vpu_core *core);
> +	int (*restore_core)(struct vpu_core *core);
> +	int (*get_power_state)(struct vpu_core *core);
> +	int (*on_firmware_loaded)(struct vpu_core *core);
> +	void (*init_rpc)(struct vpu_shared_addr *shared,
> +			struct vpu_buffer *rpc, dma_addr_t boot_addr);
> +	void (*set_log_buf)(struct vpu_shared_addr *shared,
> +			struct vpu_buffer *log);
> +	void (*set_system_cfg)(struct vpu_shared_addr *shared,
> +			u32 regs_base, void __iomem *regs, u32 index);
> +	void (*set_stream_cfg)(struct vpu_shared_addr *shared, u32 index);
> +	u32 (*get_version)(struct vpu_shared_addr *shared);
> +	u32 (*get_max_instance_count)(struct vpu_shared_addr *shared);
> +	int (*get_stream_buffer_size)(struct vpu_shared_addr *shared);
> +	int (*send_cmd_buf)(struct vpu_shared_addr *shared,
> +			struct vpu_rpc_event *cmd);
> +	int (*receive_msg_buf)(struct vpu_shared_addr *shared,
> +			struct vpu_rpc_event *msg);
> +	int (*pack_cmd)(struct vpu_rpc_event *pkt, u32 index, u32 id, void *data);
> +	int (*convert_msg_id)(u32 msg_id);
> +	int (*unpack_msg_data)(struct vpu_rpc_event *pkt, void *data);
> +	int (*input_frame)(struct vpu_shared_addr *shared,
> +			struct vpu_inst *inst, struct vb2_buffer *vb);
> +	int (*config_memory_resource)(struct vpu_shared_addr *shared,
> +					u32 instance,
> +					u32 type,
> +					u32 index,
> +					struct vpu_buffer *buf);
> +	int (*config_stream_buffer)(struct vpu_shared_addr *shared,
> +					u32 instance,
> +					struct vpu_buffer *buf);
> +	int (*update_stream_buffer)(struct vpu_shared_addr *shared,
> +					u32 instance, u32 ptr, bool write);
> +	int (*get_stream_buffer_desc)(struct vpu_shared_addr *shared,
> +					u32 instance,
> +					struct vpu_rpc_buffer_desc *desc);
> +	int (*set_encode_params)(struct vpu_shared_addr *shared,
> +			u32 instance,
> +			struct vpu_encode_params *params, u32 update);
> +	int (*set_decode_params)(struct vpu_shared_addr *shared,
> +			u32 instance,
> +			struct vpu_decode_params *params, u32 update);
> +	int (*add_scode)(struct vpu_shared_addr *shared,
> +				u32 instance,
> +				struct vpu_buffer *stream_buffer,
> +				u32 pixelformat,
> +				u32 scode_type);
> +	int (*pre_send_cmd)(struct vpu_shared_addr *shared, u32 instance);
> +	int (*post_send_cmd)(struct vpu_shared_addr *shared, u32 instance);
> +	int (*init_instance)(struct vpu_shared_addr *shared, u32 instance);
> +};
> +
> +enum {
> +	VPU_CORE_MEMORY_INVALID = 0,
> +	VPU_CORE_MEMORY_CACHED,
> +	VPU_CORE_MEMORY_UNCACHED
> +};
> +
> +struct vpu_rpc_region_t {
> +	dma_addr_t start;
> +	dma_addr_t end;
> +	dma_addr_t type;
> +};
> +
> +struct vpu_iface_ops *vpu_iface_get(struct vpu_core *core);
> +u32 vpu_iface_check_memory_region(struct vpu_core *core, dma_addr_t addr, u32 size);
> +
> +static inline bool vpu_iface_check_codec(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->check_codec)
> +		return ops->check_codec(core->type);
> +
> +	return true;
> +}
> +
> +static inline bool vpu_iface_check_format(struct vpu_core *core, u32 pixelfmt)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->check_fmt)
> +		return ops->check_fmt(core->type, pixelfmt);
> +
> +	return true;
> +}
> +
> +static inline int vpu_iface_boot_core(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->boot_core)
> +		return ops->boot_core(core);
> +	return 0;
> +}
> +
> +static inline int vpu_iface_get_power_state(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->get_power_state)
> +		return ops->get_power_state(core);
> +	return 1;
> +}
> +
> +static inline int vpu_iface_shutdown_core(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->shutdown_core)
> +		return ops->shutdown_core(core);
> +	return 0;
> +}
> +
> +static inline int vpu_iface_restore_core(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->restore_core)
> +		return ops->restore_core(core);
> +	return -EINVAL;
> +}
> +
> +static inline int vpu_iface_on_firmware_loaded(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (ops && ops->on_firmware_loaded)
> +		return ops->on_firmware_loaded(core);
> +
> +	return 0;
> +}
> +
> +static inline u32 vpu_iface_get_data_size(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->get_data_size)
> +		return 0;
> +
> +	return ops->get_data_size();
> +}
> +
> +static inline int vpu_iface_init(struct vpu_core *core,
> +				struct vpu_shared_addr *shared,
> +				struct vpu_buffer *rpc,
> +				dma_addr_t boot_addr)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->init_rpc)
> +		return -EINVAL;
> +
> +	ops->init_rpc(shared, rpc, boot_addr);
> +	core->iface = shared;
> +	shared->core = core;
> +	if (rpc->bytesused > rpc->length)
> +		return -ENOSPC;
> +	return 0;
> +}
> +
> +static inline int vpu_iface_set_log_buf(struct vpu_core *core,
> +					struct vpu_buffer *log)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops)
> +		return -EINVAL;
> +
> +	if (ops->set_log_buf)
> +		ops->set_log_buf(core->iface, log);
> +
> +	return 0;
> +}
> +
> +static inline int vpu_iface_config_system(struct vpu_core *core,
> +		u32 regs_base, void __iomem *regs)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops)
> +		return -EINVAL;
> +	if (ops->set_system_cfg)
> +		ops->set_system_cfg(core->iface, regs_base, regs, core->id);
> +
> +	return 0;
> +}
> +
> +static inline int vpu_iface_get_stream_buffer_size(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->get_stream_buffer_size)
> +		return 0;
> +
> +	return ops->get_stream_buffer_size(core->iface);
> +}
> +
> +static inline int vpu_iface_config_stream(struct vpu_inst *inst)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops)
> +		return -EINVAL;
> +	if (ops->set_stream_cfg)
> +		ops->set_stream_cfg(inst->core->iface, inst->id);
> +	return 0;
> +}
> +
> +static inline int vpu_iface_send_cmd(struct vpu_core *core, struct vpu_rpc_event *cmd)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->send_cmd_buf)
> +		return -EINVAL;
> +
> +	return ops->send_cmd_buf(core->iface, cmd);
> +}
> +
> +static inline int vpu_iface_receive_msg(struct vpu_core *core, struct vpu_rpc_event *msg)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->receive_msg_buf)
> +		return -EINVAL;
> +
> +	return ops->receive_msg_buf(core->iface, msg);
> +}
> +
> +static inline int vpu_iface_pack_cmd(struct vpu_core *core,
> +					struct vpu_rpc_event *pkt,
> +					u32 index, u32 id, void *data)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->pack_cmd)
> +		return -EINVAL;
> +	return ops->pack_cmd(pkt, index, id, data);
> +}
> +
> +static inline int vpu_iface_convert_msg_id(struct vpu_core *core, u32 msg_id)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->convert_msg_id)
> +		return -EINVAL;
> +
> +	return ops->convert_msg_id(msg_id);
> +}
> +
> +static inline int vpu_iface_unpack_msg_data(struct vpu_core *core,
> +						struct vpu_rpc_event *pkt, void *data)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->unpack_msg_data)
> +		return -EINVAL;
> +
> +	return ops->unpack_msg_data(pkt, data);
> +}
> +
> +static inline int vpu_iface_input_frame(struct vpu_inst *inst,
> +						struct vb2_buffer *vb)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	if (!ops || !ops->input_frame)
> +		return -EINVAL;
> +
> +	return ops->input_frame(inst->core->iface, inst, vb);
> +}
> +
> +static inline int vpu_iface_config_memory_resource(struct vpu_inst *inst,
> +			u32 type, u32 index, struct vpu_buffer *buf)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->config_memory_resource)
> +		return -EINVAL;
> +
> +	return ops->config_memory_resource(inst->core->iface,
> +					inst->id,
> +					type, index, buf);
> +}
> +
> +static inline int vpu_iface_config_stream_buffer(struct vpu_inst *inst,
> +						struct vpu_buffer *buf)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->config_stream_buffer)
> +		return -EINVAL;
> +
> +	return ops->config_stream_buffer(inst->core->iface, inst->id, buf);
> +}
> +
> +static inline int vpu_iface_update_stream_buffer(struct vpu_inst *inst,
> +						u32 ptr, bool write)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->update_stream_buffer)
> +		return -EINVAL;
> +
> +	return ops->update_stream_buffer(inst->core->iface, inst->id, ptr, write);
> +}
> +
> +static inline int vpu_iface_get_stream_buffer_desc(struct vpu_inst *inst,
> +					struct vpu_rpc_buffer_desc *desc)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->get_stream_buffer_desc)
> +		return -EINVAL;
> +
> +	if (!desc)
> +		return 0;
> +
> +	return ops->get_stream_buffer_desc(inst->core->iface, inst->id, desc);
> +}
> +
> +static inline u32 vpu_iface_get_version(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->get_version)
> +		return 0;
> +
> +	return ops->get_version(core->iface);
> +}
> +
> +static inline u32 vpu_iface_get_max_instance_count(struct vpu_core *core)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(core);
> +
> +	if (!ops || !ops->get_max_instance_count)
> +		return 0;
> +
> +	return ops->get_max_instance_count(core->iface);
> +}
> +
> +static inline int vpu_iface_set_encode_params(struct vpu_inst *inst,
> +				struct vpu_encode_params *params, u32 update)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->set_encode_params)
> +		return -EINVAL;
> +
> +	return ops->set_encode_params(inst->core->iface, inst->id, params, update);
> +}
> +
> +static inline int vpu_iface_set_decode_params(struct vpu_inst *inst,
> +				struct vpu_decode_params *params, u32 update)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->set_decode_params)
> +		return -EINVAL;
> +
> +	return ops->set_decode_params(inst->core->iface, inst->id, params, update);
> +}
> +
> +static inline int vpu_iface_add_scode(struct vpu_inst *inst, u32 scode_type)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (!ops || !ops->add_scode)
> +		return -EINVAL;
> +
> +	return ops->add_scode(inst->core->iface, inst->id,
> +				&inst->stream_buffer,
> +				inst->out_format.pixfmt,
> +				scode_type);
> +}
> +
> +static inline int vpu_iface_pre_send_cmd(struct vpu_inst *inst)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (ops && ops->pre_send_cmd)
> +		return ops->pre_send_cmd(inst->core->iface, inst->id);
> +	return 0;
> +}
> +
> +static inline int vpu_iface_post_send_cmd(struct vpu_inst *inst)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (ops && ops->post_send_cmd)
> +		return ops->post_send_cmd(inst->core->iface, inst->id);
> +	return 0;
> +}
> +
> +static inline int vpu_iface_init_instance(struct vpu_inst *inst)
> +{
> +	struct vpu_iface_ops *ops = vpu_iface_get(inst->core);
> +
> +	WARN_ON(inst->id < 0);
> +	if (ops && ops->init_instance)
> +		return ops->init_instance(inst->core->iface, inst->id);
> +
> +	return 0;
> +}
> +
> +#endif