sound/soc/intel/skylake/skl-sst-cldma.c - codeaurora/cp-linux - Gitiles

 /*
  * skl-sst-cldma.c - Code Loader DMA handler
  *
  * Copyright (C) 2015, Intel Corporation.
  * Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as version 2, as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  */

 #include <linux/device.h>
 #include <linux/mm.h>
 #include <linux/kthread.h>
 #include "../common/sst-dsp.h"
 #include "../common/sst-dsp-priv.h"

 static void skl_cldma_int_enable(struct sst_dsp *ctx)
 {
 	sst_dsp_shim_update_bits_unlocked(ctx, SKL_ADSP_REG_ADSPIC,
 				SKL_ADSPIC_CL_DMA, SKL_ADSPIC_CL_DMA);
 }

 void skl_cldma_int_disable(struct sst_dsp *ctx)
 {
 	sst_dsp_shim_update_bits_unlocked(ctx,
 			SKL_ADSP_REG_ADSPIC, SKL_ADSPIC_CL_DMA, 0);
 }

 /* Code loader helper APIs */
 static void skl_cldma_setup_bdle(struct sst_dsp *ctx,
 		struct snd_dma_buffer *dmab_data,
 		u32 **bdlp, int size, int with_ioc)
 {
 	u32 *bdl = *bdlp;

 	ctx->cl_dev.frags = 0;
 	while (size > 0) {
 		phys_addr_t addr = virt_to_phys(dmab_data->area +
 				(ctx->cl_dev.frags * ctx->cl_dev.bufsize));

 		bdl[0] = cpu_to_le32(lower_32_bits(addr));
 		bdl[1] = cpu_to_le32(upper_32_bits(addr));

 		bdl[2] = cpu_to_le32(ctx->cl_dev.bufsize);

 		size -= ctx->cl_dev.bufsize;
 		bdl[3] = (size || !with_ioc) ? 0 : cpu_to_le32(0x01);

 		bdl += 4;
 		ctx->cl_dev.frags++;
 	}
 }

 /*
  * Setup controller
  * Configure the registers to update the dma buffer address and
  * enable interrupts.
  * Note: Using the channel 1 for transfer
  */
 static void skl_cldma_setup_controller(struct sst_dsp  *ctx,
 		struct snd_dma_buffer *dmab_bdl, unsigned int max_size,
 		u32 count)
 {
 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPL,
 			CL_SD_BDLPLBA(dmab_bdl->addr));
 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPU,
 			CL_SD_BDLPUBA(dmab_bdl->addr));

 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_CBL, max_size);
 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_LVI, count - 1);
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 			CL_SD_CTL_IOCE_MASK, CL_SD_CTL_IOCE(1));
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 			CL_SD_CTL_FEIE_MASK, CL_SD_CTL_FEIE(1));
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 			CL_SD_CTL_DEIE_MASK, CL_SD_CTL_DEIE(1));
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 			CL_SD_CTL_STRM_MASK, CL_SD_CTL_STRM(FW_CL_STREAM_NUMBER));
 }

 static void skl_cldma_setup_spb(struct sst_dsp  *ctx,
 		unsigned int size, bool enable)
 {
 	if (enable)
 		sst_dsp_shim_update_bits_unlocked(ctx,
 				SKL_ADSP_REG_CL_SPBFIFO_SPBFCCTL,
 				CL_SPBFIFO_SPBFCCTL_SPIBE_MASK,
 				CL_SPBFIFO_SPBFCCTL_SPIBE(1));

 	sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, size);
 }

 static void skl_cldma_cleanup_spb(struct sst_dsp  *ctx)
 {
 	sst_dsp_shim_update_bits_unlocked(ctx,
 			SKL_ADSP_REG_CL_SPBFIFO_SPBFCCTL,
 			CL_SPBFIFO_SPBFCCTL_SPIBE_MASK,
 			CL_SPBFIFO_SPBFCCTL_SPIBE(0));

 	sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, 0);
 }

 static void skl_cldma_trigger(struct sst_dsp  *ctx, bool enable)
 {
 	if (enable)
 		sst_dsp_shim_update_bits_unlocked(ctx,
 			SKL_ADSP_REG_CL_SD_CTL,
 			CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(1));
 	else
 		sst_dsp_shim_update_bits_unlocked(ctx,
 			SKL_ADSP_REG_CL_SD_CTL,
 			CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(0));
 }

 static void skl_cldma_cleanup(struct sst_dsp  *ctx)
 {
 	skl_cldma_cleanup_spb(ctx);

 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 				CL_SD_CTL_IOCE_MASK, CL_SD_CTL_IOCE(0));
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 				CL_SD_CTL_FEIE_MASK, CL_SD_CTL_FEIE(0));
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 				CL_SD_CTL_DEIE_MASK, CL_SD_CTL_DEIE(0));
 	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
 				CL_SD_CTL_STRM_MASK, CL_SD_CTL_STRM(0));

 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPL, CL_SD_BDLPLBA(0));
 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPU, 0);

 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_CBL, 0);
 	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_LVI, 0);
 }

 static int skl_cldma_wait_interruptible(struct sst_dsp *ctx)
 {
 	int ret = 0;

 	if (!wait_event_timeout(ctx->cl_dev.wait_queue,
 				ctx->cl_dev.wait_condition,
 				msecs_to_jiffies(SKL_WAIT_TIMEOUT))) {
 		dev_err(ctx->dev, "%s: Wait timeout\n", __func__);
 		ret = -EIO;
 		goto cleanup;
 	}

 	dev_dbg(ctx->dev, "%s: Event wake\n", __func__);
 	if (ctx->cl_dev.wake_status != SKL_CL_DMA_BUF_COMPLETE) {
 		dev_err(ctx->dev, "%s: DMA Error\n", __func__);
 		ret = -EIO;
 	}

 cleanup:
 	ctx->cl_dev.wake_status = SKL_CL_DMA_STATUS_NONE;
 	return ret;
 }

 static void skl_cldma_stop(struct sst_dsp *ctx)
 {
 	ctx->cl_dev.ops.cl_trigger(ctx, false);
 }

 static void skl_cldma_fill_buffer(struct sst_dsp *ctx, unsigned int size,
 		const void *curr_pos, bool intr_enable, bool trigger)
 {
 	dev_dbg(ctx->dev, "Size: %x, intr_enable: %d\n", size, intr_enable);
 	dev_dbg(ctx->dev, "buf_pos_index:%d, trigger:%d\n",
 			ctx->cl_dev.dma_buffer_offset, trigger);
 	dev_dbg(ctx->dev, "spib position: %d\n", ctx->cl_dev.curr_spib_pos);

 	memcpy(ctx->cl_dev.dmab_data.area + ctx->cl_dev.dma_buffer_offset,
 			curr_pos, size);

 	if (ctx->cl_dev.curr_spib_pos == ctx->cl_dev.bufsize)
 		ctx->cl_dev.dma_buffer_offset = 0;
 	else
 		ctx->cl_dev.dma_buffer_offset = ctx->cl_dev.curr_spib_pos;

 	ctx->cl_dev.wait_condition = false;

 	if (intr_enable)
 		skl_cldma_int_enable(ctx);

 	ctx->cl_dev.ops.cl_setup_spb(ctx, ctx->cl_dev.curr_spib_pos, trigger);
 	if (trigger)
 		ctx->cl_dev.ops.cl_trigger(ctx, true);
 }

 /*
  * The CL dma doesn't have any way to update the transfer status until a BDL
  * buffer is fully transferred
  *
  * So Copying is divided in two parts.
  * 1. Interrupt on buffer done where the size to be transferred is more than
  *    ring buffer size.
  * 2. Polling on fw register to identify if data left to transferred doesn't
  *    fill the ring buffer. Caller takes care of polling the required status
  *    register to identify the transfer status.
  */
 static int
 skl_cldma_copy_to_buf(struct sst_dsp *ctx, const void *bin, u32 total_size)
 {
 	int ret = 0;
 	bool start = true;
 	unsigned int excess_bytes;
 	u32 size;
 	unsigned int bytes_left = total_size;
 	const void *curr_pos = bin;

 	if (total_size <= 0)
 		return -EINVAL;

 	dev_dbg(ctx->dev, "%s: Total binary size: %u\n", __func__, bytes_left);

 	while (bytes_left) {
 		if (bytes_left > ctx->cl_dev.bufsize) {

 			/*
 			 * dma transfers only till the write pointer as
 			 * updated in spib
 			 */
 			if (ctx->cl_dev.curr_spib_pos == 0)
 				ctx->cl_dev.curr_spib_pos = ctx->cl_dev.bufsize;

 			size = ctx->cl_dev.bufsize;
 			skl_cldma_fill_buffer(ctx, size, curr_pos, true, start);

 			start = false;
 			ret = skl_cldma_wait_interruptible(ctx);
 			if (ret < 0) {
 				skl_cldma_stop(ctx);
 				return ret;
 			}

 		} else {
 			skl_cldma_int_disable(ctx);

 			if ((ctx->cl_dev.curr_spib_pos + bytes_left)
 							<= ctx->cl_dev.bufsize) {
 				ctx->cl_dev.curr_spib_pos += bytes_left;
 			} else {
 				excess_bytes = bytes_left -
 					(ctx->cl_dev.bufsize -
 					ctx->cl_dev.curr_spib_pos);
 				ctx->cl_dev.curr_spib_pos = excess_bytes;
 			}

 			size = bytes_left;
 			skl_cldma_fill_buffer(ctx, size,
 					curr_pos, false, start);
 		}
 		bytes_left -= size;
 		curr_pos = curr_pos + size;
 	}

 	return ret;
 }

 void skl_cldma_process_intr(struct sst_dsp *ctx)
 {
 	u8 cl_dma_intr_status;

 	cl_dma_intr_status =
 		sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_CL_SD_STS);

 	if (!(cl_dma_intr_status & SKL_CL_DMA_SD_INT_COMPLETE))
 		ctx->cl_dev.wake_status = SKL_CL_DMA_ERR;
 	else
 		ctx->cl_dev.wake_status = SKL_CL_DMA_BUF_COMPLETE;

 	ctx->cl_dev.wait_condition = true;
 	wake_up(&ctx->cl_dev.wait_queue);
 }

 int skl_cldma_prepare(struct sst_dsp *ctx)
 {
 	int ret;
 	u32 *bdl;

 	ctx->cl_dev.bufsize = SKL_MAX_BUFFER_SIZE;

 	/* Allocate cl ops */
 	ctx->cl_dev.ops.cl_setup_bdle = skl_cldma_setup_bdle;
 	ctx->cl_dev.ops.cl_setup_controller = skl_cldma_setup_controller;
 	ctx->cl_dev.ops.cl_setup_spb = skl_cldma_setup_spb;
 	ctx->cl_dev.ops.cl_cleanup_spb = skl_cldma_cleanup_spb;
 	ctx->cl_dev.ops.cl_trigger = skl_cldma_trigger;
 	ctx->cl_dev.ops.cl_cleanup_controller = skl_cldma_cleanup;
 	ctx->cl_dev.ops.cl_copy_to_dmabuf = skl_cldma_copy_to_buf;
 	ctx->cl_dev.ops.cl_stop_dma = skl_cldma_stop;

 	/* Allocate buffer*/
 	ret = ctx->dsp_ops.alloc_dma_buf(ctx->dev,
 			&ctx->cl_dev.dmab_data, ctx->cl_dev.bufsize);
 	if (ret < 0) {
 		dev_err(ctx->dev, "Alloc buffer for base fw failed: %x", ret);
 		return ret;
 	}
 	/* Setup Code loader BDL */
 	ret = ctx->dsp_ops.alloc_dma_buf(ctx->dev,
 			&ctx->cl_dev.dmab_bdl, PAGE_SIZE);
 	if (ret < 0) {
 		dev_err(ctx->dev, "Alloc buffer for blde failed: %x", ret);
 		ctx->dsp_ops.free_dma_buf(ctx->dev, &ctx->cl_dev.dmab_data);
 		return ret;
 	}
 	bdl = (u32 *)ctx->cl_dev.dmab_bdl.area;

 	/* Allocate BDLs */
 	ctx->cl_dev.ops.cl_setup_bdle(ctx, &ctx->cl_dev.dmab_data,
 			&bdl, ctx->cl_dev.bufsize, 1);
 	ctx->cl_dev.ops.cl_setup_controller(ctx, &ctx->cl_dev.dmab_bdl,
 			ctx->cl_dev.bufsize, ctx->cl_dev.frags);

 	ctx->cl_dev.curr_spib_pos = 0;
 	ctx->cl_dev.dma_buffer_offset = 0;
 	init_waitqueue_head(&ctx->cl_dev.wait_queue);

 	return ret;
 }
	/*
	* skl-sst-cldma.c - Code Loader DMA handler
	*
	* Copyright (C) 2015, Intel Corporation.
	* Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as version 2, as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*/

	#include <linux/device.h>
	#include <linux/mm.h>
	#include <linux/kthread.h>
	#include "../common/sst-dsp.h"
	#include "../common/sst-dsp-priv.h"

	static void skl_cldma_int_enable(struct sst_dsp *ctx)
	{
	sst_dsp_shim_update_bits_unlocked(ctx, SKL_ADSP_REG_ADSPIC,
	SKL_ADSPIC_CL_DMA, SKL_ADSPIC_CL_DMA);
	}

	void skl_cldma_int_disable(struct sst_dsp *ctx)
	{
	sst_dsp_shim_update_bits_unlocked(ctx,
	SKL_ADSP_REG_ADSPIC, SKL_ADSPIC_CL_DMA, 0);
	}

	/* Code loader helper APIs */
	static void skl_cldma_setup_bdle(struct sst_dsp *ctx,
	struct snd_dma_buffer *dmab_data,
	u32 **bdlp, int size, int with_ioc)
	{
	u32 bdl = bdlp;

	ctx->cl_dev.frags = 0;
	while (size > 0) {
	phys_addr_t addr = virt_to_phys(dmab_data->area +
	(ctx->cl_dev.frags * ctx->cl_dev.bufsize));

	bdl[0] = cpu_to_le32(lower_32_bits(addr));
	bdl[1] = cpu_to_le32(upper_32_bits(addr));

	bdl[2] = cpu_to_le32(ctx->cl_dev.bufsize);

	size -= ctx->cl_dev.bufsize;
	bdl[3] = (size \|\| !with_ioc) ? 0 : cpu_to_le32(0x01);

	bdl += 4;
	ctx->cl_dev.frags++;
	}
	}

	/*
	* Setup controller
	* Configure the registers to update the dma buffer address and
	* enable interrupts.
	* Note: Using the channel 1 for transfer
	*/
	static void skl_cldma_setup_controller(struct sst_dsp *ctx,
	struct snd_dma_buffer *dmab_bdl, unsigned int max_size,
	u32 count)
	{
	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPL,
	CL_SD_BDLPLBA(dmab_bdl->addr));
	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPU,
	CL_SD_BDLPUBA(dmab_bdl->addr));

	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_CBL, max_size);
	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_LVI, count - 1);
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_IOCE_MASK, CL_SD_CTL_IOCE(1));
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_FEIE_MASK, CL_SD_CTL_FEIE(1));
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_DEIE_MASK, CL_SD_CTL_DEIE(1));
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_STRM_MASK, CL_SD_CTL_STRM(FW_CL_STREAM_NUMBER));
	}

	static void skl_cldma_setup_spb(struct sst_dsp *ctx,
	unsigned int size, bool enable)
	{
	if (enable)
	sst_dsp_shim_update_bits_unlocked(ctx,
	SKL_ADSP_REG_CL_SPBFIFO_SPBFCCTL,
	CL_SPBFIFO_SPBFCCTL_SPIBE_MASK,
	CL_SPBFIFO_SPBFCCTL_SPIBE(1));

	sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, size);
	}

	static void skl_cldma_cleanup_spb(struct sst_dsp *ctx)
	{
	sst_dsp_shim_update_bits_unlocked(ctx,
	SKL_ADSP_REG_CL_SPBFIFO_SPBFCCTL,
	CL_SPBFIFO_SPBFCCTL_SPIBE_MASK,
	CL_SPBFIFO_SPBFCCTL_SPIBE(0));

	sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, 0);
	}

	static void skl_cldma_trigger(struct sst_dsp *ctx, bool enable)
	{
	if (enable)
	sst_dsp_shim_update_bits_unlocked(ctx,
	SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(1));
	else
	sst_dsp_shim_update_bits_unlocked(ctx,
	SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(0));
	}

	static void skl_cldma_cleanup(struct sst_dsp *ctx)
	{
	skl_cldma_cleanup_spb(ctx);

	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_IOCE_MASK, CL_SD_CTL_IOCE(0));
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_FEIE_MASK, CL_SD_CTL_FEIE(0));
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_DEIE_MASK, CL_SD_CTL_DEIE(0));
	sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
	CL_SD_CTL_STRM_MASK, CL_SD_CTL_STRM(0));

	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPL, CL_SD_BDLPLBA(0));
	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPU, 0);

	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_CBL, 0);
	sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_LVI, 0);
	}

	static int skl_cldma_wait_interruptible(struct sst_dsp *ctx)
	{
	int ret = 0;

	if (!wait_event_timeout(ctx->cl_dev.wait_queue,
	ctx->cl_dev.wait_condition,
	msecs_to_jiffies(SKL_WAIT_TIMEOUT))) {
	dev_err(ctx->dev, "%s: Wait timeout\n", __func__);
	ret = -EIO;
	goto cleanup;
	}

	dev_dbg(ctx->dev, "%s: Event wake\n", __func__);
	if (ctx->cl_dev.wake_status != SKL_CL_DMA_BUF_COMPLETE) {
	dev_err(ctx->dev, "%s: DMA Error\n", __func__);
	ret = -EIO;
	}

	cleanup:
	ctx->cl_dev.wake_status = SKL_CL_DMA_STATUS_NONE;
	return ret;
	}

	static void skl_cldma_stop(struct sst_dsp *ctx)
	{
	ctx->cl_dev.ops.cl_trigger(ctx, false);
	}

	static void skl_cldma_fill_buffer(struct sst_dsp *ctx, unsigned int size,
	const void *curr_pos, bool intr_enable, bool trigger)
	{
	dev_dbg(ctx->dev, "Size: %x, intr_enable: %d\n", size, intr_enable);
	dev_dbg(ctx->dev, "buf_pos_index:%d, trigger:%d\n",
	ctx->cl_dev.dma_buffer_offset, trigger);
	dev_dbg(ctx->dev, "spib position: %d\n", ctx->cl_dev.curr_spib_pos);

	memcpy(ctx->cl_dev.dmab_data.area + ctx->cl_dev.dma_buffer_offset,
	curr_pos, size);

	if (ctx->cl_dev.curr_spib_pos == ctx->cl_dev.bufsize)
	ctx->cl_dev.dma_buffer_offset = 0;
	else
	ctx->cl_dev.dma_buffer_offset = ctx->cl_dev.curr_spib_pos;

	ctx->cl_dev.wait_condition = false;

	if (intr_enable)
	skl_cldma_int_enable(ctx);

	ctx->cl_dev.ops.cl_setup_spb(ctx, ctx->cl_dev.curr_spib_pos, trigger);
	if (trigger)
	ctx->cl_dev.ops.cl_trigger(ctx, true);
	}

	/*
	* The CL dma doesn't have any way to update the transfer status until a BDL
	* buffer is fully transferred
	*
	* So Copying is divided in two parts.
	* 1. Interrupt on buffer done where the size to be transferred is more than
	* ring buffer size.
	* 2. Polling on fw register to identify if data left to transferred doesn't
	* fill the ring buffer. Caller takes care of polling the required status
	* register to identify the transfer status.
	*/
	static int
	skl_cldma_copy_to_buf(struct sst_dsp ctx, const void bin, u32 total_size)
	{
	int ret = 0;
	bool start = true;
	unsigned int excess_bytes;
	u32 size;
	unsigned int bytes_left = total_size;
	const void *curr_pos = bin;

	if (total_size <= 0)
	return -EINVAL;

	dev_dbg(ctx->dev, "%s: Total binary size: %u\n", __func__, bytes_left);

	while (bytes_left) {
	if (bytes_left > ctx->cl_dev.bufsize) {

	/*
	* dma transfers only till the write pointer as
	* updated in spib
	*/
	if (ctx->cl_dev.curr_spib_pos == 0)
	ctx->cl_dev.curr_spib_pos = ctx->cl_dev.bufsize;

	size = ctx->cl_dev.bufsize;
	skl_cldma_fill_buffer(ctx, size, curr_pos, true, start);

	start = false;
	ret = skl_cldma_wait_interruptible(ctx);
	if (ret < 0) {
	skl_cldma_stop(ctx);
	return ret;
	}

	} else {
	skl_cldma_int_disable(ctx);

	if ((ctx->cl_dev.curr_spib_pos + bytes_left)
	<= ctx->cl_dev.bufsize) {
	ctx->cl_dev.curr_spib_pos += bytes_left;
	} else {
	excess_bytes = bytes_left -
	(ctx->cl_dev.bufsize -
	ctx->cl_dev.curr_spib_pos);
	ctx->cl_dev.curr_spib_pos = excess_bytes;
	}

	size = bytes_left;
	skl_cldma_fill_buffer(ctx, size,
	curr_pos, false, start);
	}
	bytes_left -= size;
	curr_pos = curr_pos + size;
	}

	return ret;
	}

	void skl_cldma_process_intr(struct sst_dsp *ctx)
	{
	u8 cl_dma_intr_status;

	cl_dma_intr_status =
	sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_CL_SD_STS);

	if (!(cl_dma_intr_status & SKL_CL_DMA_SD_INT_COMPLETE))
	ctx->cl_dev.wake_status = SKL_CL_DMA_ERR;
	else
	ctx->cl_dev.wake_status = SKL_CL_DMA_BUF_COMPLETE;

	ctx->cl_dev.wait_condition = true;
	wake_up(&ctx->cl_dev.wait_queue);
	}

	int skl_cldma_prepare(struct sst_dsp *ctx)
	{
	int ret;
	u32 *bdl;

	ctx->cl_dev.bufsize = SKL_MAX_BUFFER_SIZE;

	/* Allocate cl ops */
	ctx->cl_dev.ops.cl_setup_bdle = skl_cldma_setup_bdle;
	ctx->cl_dev.ops.cl_setup_controller = skl_cldma_setup_controller;
	ctx->cl_dev.ops.cl_setup_spb = skl_cldma_setup_spb;
	ctx->cl_dev.ops.cl_cleanup_spb = skl_cldma_cleanup_spb;
	ctx->cl_dev.ops.cl_trigger = skl_cldma_trigger;
	ctx->cl_dev.ops.cl_cleanup_controller = skl_cldma_cleanup;
	ctx->cl_dev.ops.cl_copy_to_dmabuf = skl_cldma_copy_to_buf;
	ctx->cl_dev.ops.cl_stop_dma = skl_cldma_stop;

	/* Allocate buffer*/
	ret = ctx->dsp_ops.alloc_dma_buf(ctx->dev,
	&ctx->cl_dev.dmab_data, ctx->cl_dev.bufsize);
	if (ret < 0) {
	dev_err(ctx->dev, "Alloc buffer for base fw failed: %x", ret);
	return ret;
	}
	/* Setup Code loader BDL */
	ret = ctx->dsp_ops.alloc_dma_buf(ctx->dev,
	&ctx->cl_dev.dmab_bdl, PAGE_SIZE);
	if (ret < 0) {
	dev_err(ctx->dev, "Alloc buffer for blde failed: %x", ret);
	ctx->dsp_ops.free_dma_buf(ctx->dev, &ctx->cl_dev.dmab_data);
	return ret;
	}
	bdl = (u32 *)ctx->cl_dev.dmab_bdl.area;

	/* Allocate BDLs */
	ctx->cl_dev.ops.cl_setup_bdle(ctx, &ctx->cl_dev.dmab_data,
	&bdl, ctx->cl_dev.bufsize, 1);
	ctx->cl_dev.ops.cl_setup_controller(ctx, &ctx->cl_dev.dmab_bdl,
	ctx->cl_dev.bufsize, ctx->cl_dev.frags);

	ctx->cl_dev.curr_spib_pos = 0;
	ctx->cl_dev.dma_buffer_offset = 0;
	init_waitqueue_head(&ctx->cl_dev.wait_queue);

	return ret;
	}