Subject: Re: [PATCH v3 06/14] dmaengine: ti: Add cppi5 header for UDMA

From: Tero Kristo <[email-masked]>
Date: Wed, 9 Oct 2019 12:13:25 +0300

On 01/10/2019 09:16, Peter Ujfalusi wrote:

It might be good to add some sort of description for the patch. At least 
telling what cppi5 actually is and why it is needed for UDMA.

Other than that, looks fine to me.

-Tero

> Signed-off-by: Peter Ujfalusi <[email-masked]>
> ---
>   include/linux/dma/ti-cppi5.h | 1049 ++++++++++++++++++++++++++++++++++
>   1 file changed, 1049 insertions(+)
>   create mode 100644 include/linux/dma/ti-cppi5.h
> 
> diff --git a/include/linux/dma/ti-cppi5.h b/include/linux/dma/ti-cppi5.h
> new file mode 100644
> index 000000000000..f795f8cb7cc5
> --- /dev/null
> +++ b/include/linux/dma/ti-cppi5.h
> @@ -0,0 +1,1049 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * CPPI5 descriptors interface
> + *
> + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
> + */
> +
> +#ifndef __TI_CPPI5_H__
> +#define __TI_CPPI5_H__
> +
> +#include <linux/bitops.h>
> +#include <linux/printk.h>
> +#include <linux/bug.h>
> +
> +/**
> + * struct cppi5_desc_hdr_t - Descriptor header, present in all types of
> + *			     descriptors
> + * @pkt_info0:		Packet info word 0 (n/a in Buffer desc)
> + * @pkt_info0:		Packet info word 1 (n/a in Buffer desc)
> + * @pkt_info0:		Packet info word 2 (n/a in Buffer desc)

You use @pkt_info0 for all, should be @pkt_info0,1,2.

> + * @src_dst_tag:	Packet info word 3 (n/a in Buffer desc)
> + */
> +struct cppi5_desc_hdr_t {
> +	u32 pkt_info0;
> +	u32 pkt_info1;
> +	u32 pkt_info2;
> +	u32 src_dst_tag;
> +} __packed;
> +
> +/**
> + * struct cppi5_host_desc_t - Host-mode packet and buffer descriptor definition
> + * @hdr:		Descriptor header
> + * @next_desc:		word 4/5: Linking word
> + * @buf_ptr:		word 6/7: Buffer pointer
> + * @buf_info1:		word 8: Buffer valid data length
> + * @org_buf_len:	word 9: Original buffer length
> + * @org_buf_ptr:	word 10/11: Original buffer pointer
> + * @epib[0]:		Extended Packet Info Data (optional, 4 words), and/or
> + *			Protocol Specific Data (optional, 0-128 bytes in
> + *			multiples of 4), and/or
> + *			Other Software Data (0-N bytes, optional)
> + */
> +struct cppi5_host_desc_t {
> +	struct cppi5_desc_hdr_t hdr;
> +	u64 next_desc;
> +	u64 buf_ptr;
> +	u32 buf_info1;
> +	u32 org_buf_len;
> +	u64 org_buf_ptr;
> +	u32 epib[0];
> +} __packed;
> +
> +#define CPPI5_DESC_MIN_ALIGN			(16U)
> +
> +#define CPPI5_INFO0_HDESC_EPIB_SIZE		(16U)
> +#define CPPI5_INFO0_HDESC_PSDATA_MAX_SIZE	(128U)
> +
> +#define CPPI5_INFO0_HDESC_TYPE_SHIFT		(30U)
> +#define CPPI5_INFO0_HDESC_TYPE_MASK		GENMASK(31, 30)
> +#define   CPPI5_INFO0_DESC_TYPE_VAL_HOST	(1U)
> +#define   CPPI5_INFO0_DESC_TYPE_VAL_MONO	(2U)
> +#define   CPPI5_INFO0_DESC_TYPE_VAL_TR		(3U)
> +#define CPPI5_INFO0_HDESC_EPIB_PRESENT		BIT(29)
> +/*
> + * Protocol Specific Words location:
> + * 0 - located in the descriptor,
> + * 1 = located in the SOP Buffer immediately prior to the data.
> + */
> +#define CPPI5_INFO0_HDESC_PSINFO_LOCATION	BIT(28)
> +#define CPPI5_INFO0_HDESC_PSINFO_SIZE_SHIFT	(22U)
> +#define CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK	GENMASK(27, 22)
> +#define CPPI5_INFO0_HDESC_PKTLEN_SHIFT		(0)
> +#define CPPI5_INFO0_HDESC_PKTLEN_MASK		GENMASK(21, 0)
> +
> +#define CPPI5_INFO1_DESC_PKTERROR_SHIFT		(28U)
> +#define CPPI5_INFO1_DESC_PKTERROR_MASK		GENMASK(31, 28)
> +#define CPPI5_INFO1_HDESC_PSFLGS_SHIFT		(24U)
> +#define CPPI5_INFO1_HDESC_PSFLGS_MASK		GENMASK(27, 24)
> +#define CPPI5_INFO1_DESC_PKTID_SHIFT		(14U)
> +#define CPPI5_INFO1_DESC_PKTID_MASK		GENMASK(23, 14)
> +#define CPPI5_INFO1_DESC_FLOWID_SHIFT		(0)
> +#define CPPI5_INFO1_DESC_FLOWID_MASK		GENMASK(13, 0)
> +
> +#define CPPI5_INFO2_HDESC_PKTTYPE_SHIFT		(27U)
> +#define CPPI5_INFO2_HDESC_PKTTYPE_MASK		GENMASK(31, 27)
> +/* Return Policy: 0 - Entire packet 1 - Each buffer */
> +#define CPPI5_INFO2_HDESC_RETPOLICY		BIT(18)
> +/*
> + * Early Return:
> + * 0 = desc pointers should be returned after all reads have been completed
> + * 1 = desc pointers should be returned immediately upon fetching
> + * the descriptor and beginning to transfer data.
> + */
> +#define CPPI5_INFO2_HDESC_EARLYRET		BIT(17)
> +/*
> + * Return Push Policy:
> + * 0 = Descriptor must be returned to tail of queue
> + * 1 = Descriptor must be returned to head of queue
> + */
> +#define CPPI5_INFO2_DESC_RETPUSHPOLICY		BIT(16)
> +#define CPPI5_INFO2_DESC_RETQ_SHIFT		(0)
> +#define CPPI5_INFO2_DESC_RETQ_MASK		GENMASK(15, 0)
> +
> +#define CPPI5_INFO3_DESC_SRCTAG_SHIFT		(16U)
> +#define CPPI5_INFO3_DESC_SRCTAG_MASK		GENMASK(31, 16)
> +#define CPPI5_INFO3_DESC_DSTTAG_SHIFT		(0)
> +#define CPPI5_INFO3_DESC_DSTTAG_MASK		GENMASK(15, 0)
> +
> +#define CPPI5_BUFINFO1_HDESC_DATA_LEN_SHIFT	(0)
> +#define CPPI5_BUFINFO1_HDESC_DATA_LEN_MASK	GENMASK(27, 0)
> +
> +#define CPPI5_OBUFINFO0_HDESC_BUF_LEN_SHIFT	(0)
> +#define CPPI5_OBUFINFO0_HDESC_BUF_LEN_MASK	GENMASK(27, 0)
> +
> +/**
> + * struct cppi5_desc_epib_t - Host Packet Descriptor Extended Packet Info Block
> + * @timestamp:		word 0: application specific timestamp
> + * @sw_info0:		word 1: Software Info 0
> + * @sw_info1:		word 1: Software Info 1
> + * @sw_info2:		word 1: Software Info 2
> + */
> +struct cppi5_desc_epib_t {
> +	u32 timestamp;	/* w0: application specific timestamp */
> +	u32 sw_info0;	/* w1: Software Info 0 */
> +	u32 sw_info1;	/* w2: Software Info 1 */
> +	u32 sw_info2;	/* w3: Software Info 2 */
> +};
> +
> +/**
> + * struct cppi5_monolithic_desc_t - Monolithic-mode packet descriptor
> + * @hdr:		Descriptor header
> + * @epib[0]:		Extended Packet Info Data (optional, 4 words), and/or
> + *			Protocol Specific Data (optional, 0-128 bytes in
> + *			multiples of 4), and/or
> + *			Other Software Data (0-N bytes, optional)
> + */
> +struct cppi5_monolithic_desc_t {
> +	struct cppi5_desc_hdr_t hdr;
> +	u32 epib[0];
> +};
> +
> +#define CPPI5_INFO2_MDESC_DATA_OFFSET_SHIFT	(18U)
> +#define CPPI5_INFO2_MDESC_DATA_OFFSET_MASK	GENMASK(26, 18)
> +
> +/*
> + * Reload Count:
> + * 0 = Finish the packet and place the descriptor back on the return queue
> + * 1-0x1ff = Vector to the Reload Index and resume processing
> + * 0x1ff indicates perpetual loop, infinite reload until the channel is stopped
> + */
> +#define CPPI5_INFO0_TRDESC_RLDCNT_SHIFT		(20U)
> +#define CPPI5_INFO0_TRDESC_RLDCNT_MASK		GENMASK(28, 20)
> +#define CPPI5_INFO0_TRDESC_RLDCNT_MAX		(0x1ff)
> +#define CPPI5_INFO0_TRDESC_RLDCNT_INFINITE	CPPI5_INFO0_TRDESC_RLDCNT_MAX
> +#define CPPI5_INFO0_TRDESC_RLDIDX_SHIFT		(14U)
> +#define CPPI5_INFO0_TRDESC_RLDIDX_MASK		GENMASK(19, 14)
> +#define CPPI5_INFO0_TRDESC_RLDIDX_MAX		(0x3f)
> +#define CPPI5_INFO0_TRDESC_LASTIDX_SHIFT	(0)
> +#define CPPI5_INFO0_TRDESC_LASTIDX_MASK		GENMASK(13, 0)
> +
> +#define CPPI5_INFO1_TRDESC_RECSIZE_SHIFT	(24U)
> +#define CPPI5_INFO1_TRDESC_RECSIZE_MASK		GENMASK(26, 24)
> +#define   CPPI5_INFO1_TRDESC_RECSIZE_VAL_16B	(0)
> +#define   CPPI5_INFO1_TRDESC_RECSIZE_VAL_32B	(1U)
> +#define   CPPI5_INFO1_TRDESC_RECSIZE_VAL_64B	(2U)
> +#define   CPPI5_INFO1_TRDESC_RECSIZE_VAL_128B	(3U)
> +
> +static inline void cppi5_desc_dump(void *desc, u32 size)
> +{
> +	print_hex_dump(KERN_ERR, "dump udmap_desc: ", DUMP_PREFIX_NONE,
> +		       32, 4, desc, size, false);
> +}
> +
> +#define CPPI5_TDCM_MARKER			(0x1)
> +/**
> + * cppi5_desc_is_tdcm - check if the paddr indicates Teardown Complete Message
> + * @paddr: Physical address of the packet popped from the ring
> + *
> + * Returns true if the address indicates TDCM
> + */
> +static inline bool cppi5_desc_is_tdcm(dma_addr_t paddr)
> +{
> +	return (paddr & CPPI5_TDCM_MARKER) ? true : false;
> +}
> +
> +/**
> + * cppi5_desc_get_type - get descriptor type
> + * @desc_hdr: packet descriptor/TR header
> + *
> + * Returns descriptor type:
> + * CPPI5_INFO0_DESC_TYPE_VAL_HOST
> + * CPPI5_INFO0_DESC_TYPE_VAL_MONO
> + * CPPI5_INFO0_DESC_TYPE_VAL_TR
> + */
> +static inline u32 cppi5_desc_get_type(struct cppi5_desc_hdr_t *desc_hdr)
> +{
> +	return (desc_hdr->pkt_info0 & CPPI5_INFO0_HDESC_TYPE_MASK) >>
> +		CPPI5_INFO0_HDESC_TYPE_SHIFT;
> +}
> +
> +/**
> + * cppi5_desc_get_errflags - get Error Flags from Desc
> + * @desc_hdr: packet/TR descriptor header
> + *
> + * Returns Error Flags from Packet/TR Descriptor
> + */
> +static inline u32 cppi5_desc_get_errflags(struct cppi5_desc_hdr_t *desc_hdr)
> +{
> +	return (desc_hdr->pkt_info1 & CPPI5_INFO1_DESC_PKTERROR_MASK) >>
> +		CPPI5_INFO1_DESC_PKTERROR_SHIFT;
> +}
> +
> +/**
> + * cppi5_desc_get_pktids - get Packet and Flow ids from Desc
> + * @desc_hdr: packet/TR descriptor header
> + * @pkt_id: Packet ID
> + * @flow_id: Flow ID
> + *
> + * Returns Packet and Flow ids from packet/TR descriptor
> + */
> +static inline void cppi5_desc_get_pktids(struct cppi5_desc_hdr_t *desc_hdr,
> +					 u32 *pkt_id, u32 *flow_id)
> +{
> +	*pkt_id = (desc_hdr->pkt_info1 & CPPI5_INFO1_DESC_PKTID_MASK) >>
> +		   CPPI5_INFO1_DESC_PKTID_SHIFT;
> +	*flow_id = (desc_hdr->pkt_info1 & CPPI5_INFO1_DESC_FLOWID_MASK) >>
> +		    CPPI5_INFO1_DESC_FLOWID_SHIFT;
> +}
> +
> +/**
> + * cppi5_desc_set_pktids - set Packet and Flow ids in Desc
> + * @desc_hdr: packet/TR descriptor header
> + * @pkt_id: Packet ID
> + * @flow_id: Flow ID
> + */
> +static inline void cppi5_desc_set_pktids(struct cppi5_desc_hdr_t *desc_hdr,
> +					 u32 pkt_id, u32 flow_id)
> +{
> +	desc_hdr->pkt_info1 |= (pkt_id << CPPI5_INFO1_DESC_PKTID_SHIFT) &
> +				CPPI5_INFO1_DESC_PKTID_MASK;
> +	desc_hdr->pkt_info1 |= (flow_id << CPPI5_INFO1_DESC_FLOWID_SHIFT) &
> +				CPPI5_INFO1_DESC_FLOWID_MASK;
> +}
> +
> +/**
> + * cppi5_desc_set_retpolicy - set Packet Return Policy in Desc
> + * @desc_hdr: packet/TR descriptor header
> + * @flags: fags, supported values
> + *  CPPI5_INFO2_HDESC_RETPOLICY
> + *  CPPI5_INFO2_HDESC_EARLYRET
> + *  CPPI5_INFO2_DESC_RETPUSHPOLICY
> + * @return_ring_id: Packet Return Queue/Ring id, value 0xFFFF reserved
> + */
> +static inline void cppi5_desc_set_retpolicy(struct cppi5_desc_hdr_t *desc_hdr,
> +					    u32 flags, u32 return_ring_id)
> +{
> +	desc_hdr->pkt_info2 |= flags;
> +	desc_hdr->pkt_info2 |= return_ring_id & CPPI5_INFO2_DESC_RETQ_MASK;
> +}
> +
> +/**
> + * cppi5_desc_get_tags_ids - get Packet Src/Dst Tags from Desc
> + * @desc_hdr: packet/TR descriptor header
> + * @src_tag_id: Source Tag
> + * @dst_tag_id: Dest Tag
> + *
> + * Returns Packet Src/Dst Tags from packet/TR descriptor
> + */
> +static inline void cppi5_desc_get_tags_ids(struct cppi5_desc_hdr_t *desc_hdr,
> +					   u32 *src_tag_id, u32 *dst_tag_id)
> +{
> +	if (src_tag_id)
> +		*src_tag_id = (desc_hdr->src_dst_tag &
> +			      CPPI5_INFO3_DESC_SRCTAG_MASK) >>
> +			      CPPI5_INFO3_DESC_SRCTAG_SHIFT;
> +	if (dst_tag_id)
> +		*dst_tag_id = desc_hdr->src_dst_tag &
> +			      CPPI5_INFO3_DESC_DSTTAG_MASK;
> +}
> +
> +/**
> + * cppi5_desc_set_tags_ids - set Packet Src/Dst Tags in HDesc
> + * @desc_hdr: packet/TR descriptor header
> + * @src_tag_id: Source Tag
> + * @dst_tag_id: Dest Tag
> + *
> + * Returns Packet Src/Dst Tags from packet/TR descriptor
> + */
> +static inline void cppi5_desc_set_tags_ids(struct cppi5_desc_hdr_t *desc_hdr,
> +					   u32 src_tag_id, u32 dst_tag_id)
> +{
> +	desc_hdr->src_dst_tag = (src_tag_id << CPPI5_INFO3_DESC_SRCTAG_SHIFT) &
> +				CPPI5_INFO3_DESC_SRCTAG_MASK;
> +	desc_hdr->src_dst_tag |= dst_tag_id & CPPI5_INFO3_DESC_DSTTAG_MASK;
> +}
> +
> +/**
> + * cppi5_hdesc_calc_size - Calculate Host Packet Descriptor size
> + * @epib: is EPIB present
> + * @psdata_size: PSDATA size
> + * @sw_data_size: SWDATA size
> + *
> + * Returns required Host Packet Descriptor size
> + * 0 - if PSDATA > CPPI5_INFO0_HDESC_PSDATA_MAX_SIZE
> + */
> +static inline u32 cppi5_hdesc_calc_size(bool epib, u32 psdata_size,
> +					u32 sw_data_size)
> +{
> +	u32 desc_size;
> +
> +	if (psdata_size > CPPI5_INFO0_HDESC_PSDATA_MAX_SIZE)
> +		return 0;
> +
> +	desc_size = sizeof(struct cppi5_host_desc_t) + psdata_size +
> +		    sw_data_size;
> +
> +	if (epib)
> +		desc_size += CPPI5_INFO0_HDESC_EPIB_SIZE;
> +
> +	return ALIGN(desc_size, CPPI5_DESC_MIN_ALIGN);
> +}
> +
> +/**
> + * cppi5_hdesc_init - Init Host Packet Descriptor size
> + * @desc: Host packet descriptor
> + * @flags: supported values
> + *	CPPI5_INFO0_HDESC_EPIB_PRESENT
> + *	CPPI5_INFO0_HDESC_PSINFO_LOCATION
> + * @psdata_size: PSDATA size
> + *
> + * Returns required Host Packet Descriptor size
> + * 0 - if PSDATA > CPPI5_INFO0_HDESC_PSDATA_MAX_SIZE
> + */
> +static inline void cppi5_hdesc_init(struct cppi5_host_desc_t *desc, u32 flags,
> +				    u32 psdata_size)
> +{
> +	desc->hdr.pkt_info0 = (CPPI5_INFO0_DESC_TYPE_VAL_HOST <<
> +			       CPPI5_INFO0_HDESC_TYPE_SHIFT) | (flags);
> +	desc->hdr.pkt_info0 |= ((psdata_size >> 2) <<
> +				CPPI5_INFO0_HDESC_PSINFO_SIZE_SHIFT) &
> +				CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK;
> +	desc->next_desc = 0;
> +}
> +
> +/**
> + * cppi5_hdesc_update_flags - Replace descriptor flags
> + * @desc: Host packet descriptor
> + * @flags: supported values
> + *	CPPI5_INFO0_HDESC_EPIB_PRESENT
> + *	CPPI5_INFO0_HDESC_PSINFO_LOCATION
> + */
> +static inline void cppi5_hdesc_update_flags(struct cppi5_host_desc_t *desc,
> +					    u32 flags)
> +{
> +	desc->hdr.pkt_info0 &= ~(CPPI5_INFO0_HDESC_EPIB_PRESENT |
> +				 CPPI5_INFO0_HDESC_PSINFO_LOCATION);
> +	desc->hdr.pkt_info0 |= flags;
> +}
> +
> +/**
> + * cppi5_hdesc_update_psdata_size - Replace PSdata size
> + * @desc: Host packet descriptor
> + * @psdata_size: PSDATA size
> + */
> +static inline void cppi5_hdesc_update_psdata_size(
> +		struct cppi5_host_desc_t *desc, u32 psdata_size)
> +{
> +	desc->hdr.pkt_info0 &= ~CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK;
> +	desc->hdr.pkt_info0 |= ((psdata_size >> 2) <<
> +				CPPI5_INFO0_HDESC_PSINFO_SIZE_SHIFT) &
> +				CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK;
> +}
> +
> +/**
> + * cppi5_hdesc_get_psdata_size - get PSdata size in bytes
> + * @desc: Host packet descriptor
> + */
> +static inline u32 cppi5_hdesc_get_psdata_size(struct cppi5_host_desc_t *desc)
> +{
> +	u32 psdata_size = 0;
> +
> +	if (!(desc->hdr.pkt_info0 & CPPI5_INFO0_HDESC_PSINFO_LOCATION))
> +		psdata_size = (desc->hdr.pkt_info0 &
> +			       CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK) >>
> +			       CPPI5_INFO0_HDESC_PSINFO_SIZE_SHIFT;
> +
> +	return (psdata_size << 2);
> +}
> +
> +/**
> + * cppi5_hdesc_get_pktlen - get Packet Length from HDesc
> + * @desc: Host packet descriptor
> + *
> + * Returns Packet Length from Host Packet Descriptor
> + */
> +static inline u32 cppi5_hdesc_get_pktlen(struct cppi5_host_desc_t *desc)
> +{
> +	return (desc->hdr.pkt_info0 & CPPI5_INFO0_HDESC_PKTLEN_MASK);
> +}
> +
> +/**
> + * cppi5_hdesc_set_pktlen - set Packet Length in HDesc
> + * @desc: Host packet descriptor
> + */
> +static inline void cppi5_hdesc_set_pktlen(struct cppi5_host_desc_t *desc,
> +					  u32 pkt_len)
> +{
> +	desc->hdr.pkt_info0 |= (pkt_len & CPPI5_INFO0_HDESC_PKTLEN_MASK);
> +}
> +
> +/**
> + * cppi5_hdesc_get_psflags - get Protocol Specific Flags from HDesc
> + * @desc: Host packet descriptor
> + *
> + * Returns Protocol Specific Flags from Host Packet Descriptor
> + */
> +static inline u32 cppi5_hdesc_get_psflags(struct cppi5_host_desc_t *desc)
> +{
> +	return (desc->hdr.pkt_info1 & CPPI5_INFO1_HDESC_PSFLGS_MASK) >>
> +		CPPI5_INFO1_HDESC_PSFLGS_SHIFT;
> +}
> +
> +/**
> + * cppi5_hdesc_set_psflags - set Protocol Specific Flags in HDesc
> + * @desc: Host packet descriptor
> + */
> +static inline void cppi5_hdesc_set_psflags(struct cppi5_host_desc_t *desc,
> +					   u32 ps_flags)
> +{
> +	desc->hdr.pkt_info1 |= (ps_flags <<
> +				CPPI5_INFO1_HDESC_PSFLGS_SHIFT) &
> +				CPPI5_INFO1_HDESC_PSFLGS_MASK;
> +}
> +
> +/**
> + * cppi5_hdesc_get_errflags - get Packet Type from HDesc
> + * @desc: Host packet descriptor
> + */
> +static inline u32 cppi5_hdesc_get_pkttype(struct cppi5_host_desc_t *desc)
> +{
> +	return (desc->hdr.pkt_info2 & CPPI5_INFO2_HDESC_PKTTYPE_MASK) >>
> +		CPPI5_INFO2_HDESC_PKTTYPE_SHIFT;
> +}
> +
> +/**
> + * cppi5_hdesc_get_errflags - set Packet Type in HDesc
> + * @desc: Host packet descriptor
> + * @pkt_type: Packet Type
> + */
> +static inline void cppi5_hdesc_set_pkttype(struct cppi5_host_desc_t *desc,
> +					   u32 pkt_type)
> +{
> +	desc->hdr.pkt_info2 |=
> +			(pkt_type << CPPI5_INFO2_HDESC_PKTTYPE_SHIFT) &
> +			 CPPI5_INFO2_HDESC_PKTTYPE_MASK;
> +}
> +
> +/**
> + * cppi5_hdesc_attach_buf - attach buffer to HDesc
> + * @desc: Host packet descriptor
> + * @buf: Buffer physical address
> + * @buf_data_len: Buffer length
> + * @obuf: Original Buffer physical address
> + * @obuf_len: Original Buffer length
> + *
> + * Attaches buffer to Host Packet Descriptor
> + */
> +static inline void cppi5_hdesc_attach_buf(struct cppi5_host_desc_t *desc,
> +					  dma_addr_t buf, u32 buf_data_len,
> +					  dma_addr_t obuf, u32 obuf_len)
> +{
> +	desc->buf_ptr = buf;
> +	desc->buf_info1 = buf_data_len & CPPI5_BUFINFO1_HDESC_DATA_LEN_MASK;
> +	desc->org_buf_ptr = obuf;
> +	desc->org_buf_len = obuf_len & CPPI5_OBUFINFO0_HDESC_BUF_LEN_MASK;
> +}
> +
> +static inline void cppi5_hdesc_get_obuf(struct cppi5_host_desc_t *desc,
> +					dma_addr_t *obuf, u32 *obuf_len)
> +{
> +	*obuf = desc->org_buf_ptr;
> +	*obuf_len = desc->org_buf_len & CPPI5_OBUFINFO0_HDESC_BUF_LEN_MASK;
> +}
> +
> +static inline void cppi5_hdesc_reset_to_original(struct cppi5_host_desc_t *desc)
> +{
> +	desc->buf_ptr = desc->org_buf_ptr;
> +	desc->buf_info1 = desc->org_buf_len;
> +}
> +
> +/**
> + * cppi5_hdesc_link_hbdesc - link Host Buffer Descriptor to HDesc
> + * @desc: Host Packet Descriptor
> + * @buf_desc: Host Buffer Descriptor physical address
> + *
> + * add and link Host Buffer Descriptor to HDesc
> + */
> +static inline void cppi5_hdesc_link_hbdesc(struct cppi5_host_desc_t *desc,
> +					   dma_addr_t hbuf_desc)
> +{
> +	desc->next_desc = hbuf_desc;
> +}
> +
> +static inline dma_addr_t cppi5_hdesc_get_next_hbdesc(
> +		struct cppi5_host_desc_t *desc)
> +{
> +	return (dma_addr_t)desc->next_desc;
> +}
> +
> +static inline void cppi5_hdesc_reset_hbdesc(struct cppi5_host_desc_t *desc)
> +{
> +	desc->hdr = (struct cppi5_desc_hdr_t) { 0 };
> +	desc->next_desc = 0;
> +}
> +
> +/**
> + * cppi5_hdesc_epib_present -  check if EPIB present
> + * @desc_hdr: packet descriptor/TR header
> + *
> + * Returns true if EPIB present in the packet
> + */
> +static inline bool cppi5_hdesc_epib_present(struct cppi5_desc_hdr_t *desc_hdr)
> +{
> +	return !!(desc_hdr->pkt_info0 & CPPI5_INFO0_HDESC_EPIB_PRESENT);
> +}
> +
> +/**
> + * cppi5_hdesc_get_psdata -  Get pointer on PSDATA
> + * @desc: Host packet descriptor
> + *
> + * Returns pointer on PSDATA in HDesc.
> + * NULL - if ps_data placed at the start of data buffer.
> + */
> +static inline void *cppi5_hdesc_get_psdata(struct cppi5_host_desc_t *desc)
> +{
> +	u32 psdata_size;
> +	void *psdata;
> +
> +	if (desc->hdr.pkt_info0 & CPPI5_INFO0_HDESC_PSINFO_LOCATION)
> +		return NULL;
> +
> +	psdata_size = (desc->hdr.pkt_info0 &
> +		       CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK) >>
> +		       CPPI5_INFO0_HDESC_PSINFO_SIZE_SHIFT;
> +
> +	if (!psdata_size)
> +		return NULL;
> +
> +	psdata = &desc->epib;
> +
> +	if (cppi5_hdesc_epib_present(&desc->hdr))
> +		psdata += CPPI5_INFO0_HDESC_EPIB_SIZE;
> +
> +	return psdata;
> +}
> +
> +static inline u32 *cppi5_hdesc_get_psdata32(struct cppi5_host_desc_t *desc)
> +{
> +	return (u32 *)cppi5_hdesc_get_psdata(desc);
> +}
> +
> +/**
> + * cppi5_hdesc_get_swdata -  Get pointer on swdata
> + * @desc: Host packet descriptor
> + *
> + * Returns pointer on SWDATA in HDesc.
> + * NOTE. It's caller responsibility to be sure hdesc actually has swdata.
> + */
> +static inline void *cppi5_hdesc_get_swdata(struct cppi5_host_desc_t *desc)
> +{
> +	u32 psdata_size = 0;
> +	void *swdata;
> +
> +	if (!(desc->hdr.pkt_info0 & CPPI5_INFO0_HDESC_PSINFO_LOCATION))
> +		psdata_size = (desc->hdr.pkt_info0 &
> +			       CPPI5_INFO0_HDESC_PSINFO_SIZE_MASK) >>
> +			       CPPI5_INFO0_HDESC_PSINFO_SIZE_SHIFT;
> +
> +	swdata = &desc->epib;
> +
> +	if (cppi5_hdesc_epib_present(&desc->hdr))
> +		swdata += CPPI5_INFO0_HDESC_EPIB_SIZE;
> +
> +	swdata += (psdata_size << 2);
> +
> +	return swdata;
> +}
> +
> +/* ================================== TR ================================== */
> +
> +#define CPPI5_TR_TYPE_SHIFT			(0U)
> +#define CPPI5_TR_TYPE_MASK			GENMASK(3, 0)
> +#define CPPI5_TR_STATIC				BIT(4)
> +#define CPPI5_TR_WAIT				BIT(5)
> +#define CPPI5_TR_EVENT_SIZE_SHIFT		(6U)
> +#define CPPI5_TR_EVENT_SIZE_MASK		GENMASK(7, 6)
> +#define CPPI5_TR_TRIGGER0_SHIFT			(8U)
> +#define CPPI5_TR_TRIGGER0_MASK			GENMASK(9, 8)
> +#define CPPI5_TR_TRIGGER0_TYPE_SHIFT		(10U)
> +#define CPPI5_TR_TRIGGER0_TYPE_MASK		GENMASK(11, 10)
> +#define CPPI5_TR_TRIGGER1_SHIFT			(12U)
> +#define CPPI5_TR_TRIGGER1_MASK			GENMASK(13, 12)
> +#define CPPI5_TR_TRIGGER1_TYPE_SHIFT		(14U)
> +#define CPPI5_TR_TRIGGER1_TYPE_MASK		GENMASK(15, 14)
> +#define CPPI5_TR_CMD_ID_SHIFT			(16U)
> +#define CPPI5_TR_CMD_ID_MASK			GENMASK(23, 16)
> +#define CPPI5_TR_CSF_FLAGS_SHIFT		(24U)
> +#define CPPI5_TR_CSF_FLAGS_MASK			GENMASK(31, 24)
> +#define   CPPI5_TR_CSF_SA_INDIRECT		BIT(0)
> +#define   CPPI5_TR_CSF_DA_INDIRECT		BIT(1)
> +#define   CPPI5_TR_CSF_SUPR_EVT			BIT(2)
> +#define   CPPI5_TR_CSF_EOL_ADV_SHIFT		(4U)
> +#define   CPPI5_TR_CSF_EOL_ADV_MASK		GENMASK(6, 4)
> +#define   CPPI5_TR_CSF_EOP			BIT(7)
> +
> +/**
> + * enum cppi5_tr_types - TR types
> + * @CPPI5_TR_TYPE0:	One dimensional data move
> + * @CPPI5_TR_TYPE1:	Two dimensional data move
> + * @CPPI5_TR_TYPE2:	Three dimensional data move
> + * @CPPI5_TR_TYPE3:	Four dimensional data move
> + * @CPPI5_TR_TYPE4:	Four dimensional data move with data formatting
> + * @CPPI5_TR_TYPE5:	Four dimensional Cache Warm
> + * @CPPI5_TR_TYPE8:	Four Dimensional Block Move
> + * @CPPI5_TR_TYPE9:	Four Dimensional Block Move with Repacking
> + * @CPPI5_TR_TYPE10:	Two Dimensional Block Move
> + * @CPPI5_TR_TYPE11:	Two Dimensional Block Move with Repacking
> + * @CPPI5_TR_TYPE15:	Four Dimensional Block Move with Repacking and
> + *			Indirection
> + */
> +enum cppi5_tr_types {
> +	CPPI5_TR_TYPE0 = 0,
> +	CPPI5_TR_TYPE1,
> +	CPPI5_TR_TYPE2,
> +	CPPI5_TR_TYPE3,
> +	CPPI5_TR_TYPE4,
> +	CPPI5_TR_TYPE5,
> +	/* type6-7: Reserved */
> +	CPPI5_TR_TYPE8 = 8,
> +	CPPI5_TR_TYPE9,
> +	CPPI5_TR_TYPE10,
> +	CPPI5_TR_TYPE11,
> +	/* type12-14: Reserved */
> +	CPPI5_TR_TYPE15 = 15,
> +	CPPI5_TR_TYPE_MAX
> +};
> +
> +/**
> + * enum cppi5_tr_event_size - TR Flags EVENT_SIZE field specifies when an event
> + *			      is generated for each TR.
> + * @CPPI5_TR_EVENT_SIZE_COMPLETION:	When TR is complete and all status for
> + * 					the TR has been received
> + * @CPPI5_TR_EVENT_SIZE_ICNT1_DEC:	Type 0: when the last data transaction
> + *					is sent for the TR
> + *					Type 1-11: when ICNT1 is decremented
> + * @CPPI5_TR_EVENT_SIZE_ICNT2_DEC:	Type 0-1,10-11: when the last data
> + *					transaction is sent for the TR
> + *					All other types: when ICNT2 is
> + *					decremented
> + * @CPPI5_TR_EVENT_SIZE_ICNT3_DEC:	Type 0-2,10-11: when the last data
> + *					transaction is sent for the TR
> + *					All other types: when ICNT3 is
> + *					decremented
> + */
> +enum cppi5_tr_event_size {
> +	CPPI5_TR_EVENT_SIZE_COMPLETION,
> +	CPPI5_TR_EVENT_SIZE_ICNT1_DEC,
> +	CPPI5_TR_EVENT_SIZE_ICNT2_DEC,
> +	CPPI5_TR_EVENT_SIZE_ICNT3_DEC,
> +	CPPI5_TR_EVENT_SIZE_MAX
> +};
> +
> +/**
> + * enum cppi5_tr_trigger - TR Flags TRIGGERx field specifies the type of trigger
> + *			   used to enable the TR to transfer data as specified
> + *			   by TRIGGERx_TYPE field.
> + * @CPPI5_TR_TRIGGER_NONE:		No trigger
> + * @CPPI5_TR_TRIGGER_GLOBAL0:		Global trigger 0
> + * @CPPI5_TR_TRIGGER_GLOBAL1:		Global trigger 1
> + * @CPPI5_TR_TRIGGER_LOCAL_EVENT:	Local Event
> + */
> +enum cppi5_tr_trigger {
> +	CPPI5_TR_TRIGGER_NONE,
> +	CPPI5_TR_TRIGGER_GLOBAL0,
> +	CPPI5_TR_TRIGGER_GLOBAL1,
> +	CPPI5_TR_TRIGGER_LOCAL_EVENT,
> +	CPPI5_TR_TRIGGER_MAX
> +};
> +
> +/**
> + * enum cppi5_tr_trigger_type - TR Flags TRIGGERx_TYPE field specifies the type
> + *				of data transfer that will be enabled by
> + *				receiving a trigger as specified by TRIGGERx.
> + * @CPPI5_TR_TRIGGER_TYPE_ICNT1_DEC:	The second inner most loop (ICNT1) will
> + *					be decremented by 1
> + * @CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC:	The third inner most loop (ICNT2) will
> + *					be decremented by 1
> + * @CPPI5_TR_TRIGGER_TYPE_ICNT3_DEC:	The outer most loop (ICNT3) will be
> + *					decremented by 1
> + * @CPPI5_TR_TRIGGER_TYPE_ALL:		The entire TR will be allowed to
> + *					complete
> + */
> +enum cppi5_tr_trigger_type {
> +	CPPI5_TR_TRIGGER_TYPE_ICNT1_DEC,
> +	CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC,
> +	CPPI5_TR_TRIGGER_TYPE_ICNT3_DEC,
> +	CPPI5_TR_TRIGGER_TYPE_ALL,
> +	CPPI5_TR_TRIGGER_TYPE_MAX
> +};
> +
> +typedef u32 cppi5_tr_flags_t;
> +
> +/**
> + * struct cppi5_tr_type0_t - Type 0 (One dimensional data move) TR (16 byte)
> + * @flags:		TR flags (type, triggers, event, configuration)
> + * @icnt0:		Total loop iteration count for level 0 (innermost)
> + * @_reserved:		Not used
> + * @addr:		Starting address for the source data or destination data
> + */
> +struct cppi5_tr_type0_t {
> +	cppi5_tr_flags_t flags;
> +	u16 icnt0;
> +	u16 _reserved;
> +	u64 addr;
> +} __aligned(16) __packed;
> +
> +/**
> + * struct cppi5_tr_type1_t - Type 1 (Two dimensional data move) TR (32 byte)
> + * @flags:		TR flags (type, triggers, event, configuration)
> + * @icnt0:		Total loop iteration count for level 0 (innermost)
> + * @icnt1:		Total loop iteration count for level 1
> + * @addr:		Starting address for the source data or destination data
> + * @dim1:		Signed dimension for loop level 1
> + */
> +struct cppi5_tr_type1_t {
> +	cppi5_tr_flags_t flags;
> +	u16 icnt0;
> +	u16 icnt1;
> +	u64 addr;
> +	s32 dim1;
> +} __aligned(32) __packed;
> +
> +/**
> + * struct cppi5_tr_type2_t - Type 2 (Three dimensional data move) TR (32 byte)
> + * @flags:		TR flags (type, triggers, event, configuration)
> + * @icnt0:		Total loop iteration count for level 0 (innermost)
> + * @icnt1:		Total loop iteration count for level 1
> + * @addr:		Starting address for the source data or destination data
> + * @dim1:		Signed dimension for loop level 1
> + * @icnt2:		Total loop iteration count for level 2
> + * @_reserved:		Not used
> + * @dim2:		Signed dimension for loop level 2
> + */
> +struct cppi5_tr_type2_t {
> +	cppi5_tr_flags_t flags;
> +	u16 icnt0;
> +	u16 icnt1;
> +	u64 addr;
> +	s32 dim1;
> +	u16 icnt2;
> +	u16 _reserved;
> +	s32 dim2;
> +} __aligned(32) __packed;
> +
> +/**
> + * struct cppi5_tr_type3_t - Type 3 (Four dimensional data move) TR (32 byte)
> + * @flags:		TR flags (type, triggers, event, configuration)
> + * @icnt0:		Total loop iteration count for level 0 (innermost)
> + * @icnt1:		Total loop iteration count for level 1
> + * @addr:		Starting address for the source data or destination data
> + * @dim1:		Signed dimension for loop level 1
> + * @icnt2:		Total loop iteration count for level 2
> + * @icnt3:		Total loop iteration count for level 3 (outermost)
> + * @dim2:		Signed dimension for loop level 2
> + * @dim3:		Signed dimension for loop level 3
> + */
> +struct cppi5_tr_type3_t {
> +	cppi5_tr_flags_t flags;
> +	u16 icnt0;
> +	u16 icnt1;
> +	u64 addr;
> +	s32 dim1;
> +	u16 icnt2;
> +	u16 icnt3;
> +	s32 dim2;
> +	s32 dim3;
> +} __aligned(32) __packed;
> +
> +/**
> + * struct cppi5_tr_type15_t - Type 15 (Four Dimensional Block Copy with
> + *			      Repacking and Indirection Support) TR (64 byte)
> + * @flags:		TR flags (type, triggers, event, configuration)
> + * @icnt0:		Total loop iteration count for level 0 (innermost) for
> + *			source
> + * @icnt1:		Total loop iteration count for level 1 for source
> + * @addr:		Starting address for the source data
> + * @dim1:		Signed dimension for loop level 1 for source
> + * @icnt2:		Total loop iteration count for level 2 for source
> + * @icnt3:		Total loop iteration count for level 3 (outermost) for
> + *			source
> + * @dim2:		Signed dimension for loop level 2 for source
> + * @dim3:		Signed dimension for loop level 3 for source
> + * @_reserved:		Not used
> + * @ddim1:		Signed dimension for loop level 1 for destination
> + * @daddr:		Starting address for the destination data
> + * @ddim2:		Signed dimension for loop level 2 for destination
> + * @ddim3:		Signed dimension for loop level 3 for destination
> + * @dicnt0:		Total loop iteration count for level 0 (innermost) for
> + *			destination
> + * @dicnt1:		Total loop iteration count for level 1 for destination
> + * @dicnt2:		Total loop iteration count for level 2 for destination
> + * @sicnt3:		Total loop iteration count for level 3 (outermost) for
> + *			destination
> + */
> +struct cppi5_tr_type15_t {
> +	cppi5_tr_flags_t flags;
> +	u16 icnt0;
> +	u16 icnt1;
> +	u64 addr;
> +	s32 dim1;
> +	u16 icnt2;
> +	u16 icnt3;
> +	s32 dim2;
> +	s32 dim3;
> +	u32 _reserved;
> +	s32 ddim1;
> +	u64 daddr;
> +	s32 ddim2;
> +	s32 ddim3;
> +	u16 dicnt0;
> +	u16 dicnt1;
> +	u16 dicnt2;
> +	u16 dicnt3;
> +} __aligned(64) __packed;
> +
> +/**
> + * struct cppi5_tr_resp_t - TR response record
> + * @status:		Status type and info
> + * @_reserved:		Not used
> + * @cmd_id:		Command ID for the TR for TR identification
> + * @flags:		Configuration Specific Flags
> + */
> +struct cppi5_tr_resp_t {
> +	u8 status;
> +	u8 _reserved;
> +	u8 cmd_id;
> +	u8 flags;
> +} __packed;
> +
> +#define CPPI5_TR_RESPONSE_STATUS_TYPE_SHIFT	(0U)
> +#define CPPI5_TR_RESPONSE_STATUS_TYPE_MASK	GENMASK(3, 0)
> +#define CPPI5_TR_RESPONSE_STATUS_INFO_SHIFT	(4U)
> +#define CPPI5_TR_RESPONSE_STATUS_INFO_MASK	GENMASK(7, 4)
> +#define CPPI5_TR_RESPONSE_CMDID_SHIFT		(16U)
> +#define CPPI5_TR_RESPONSE_CMDID_MASK		GENMASK(23, 16)
> +#define CPPI5_TR_RESPONSE_CFG_SPECIFIC_SHIFT	(24U)
> +#define CPPI5_TR_RESPONSE_CFG_SPECIFIC_MASK	GENMASK(31, 24)
> +
> +/**
> + * enum cppi5_tr_resp_status_type - TR Response Status Type field is used to
> + *				    determine what type of status is being
> + *				    returned.
> + * @CPPI5_TR_RESPONSE_STATUS_NONE:		No error, completion: completed
> + * @CPPI5_TR_RESPONSE_STATUS_TRANSFER_ERR:	Transfer Error, completion: none
> + *						or partially completed
> + * @CPPI5_TR_RESPONSE_STATUS_ABORTED_ERR:	Aborted Error, completion: none
> + *						or partially completed
> + * @CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ERR:	Submission Error, completion:
> + *						none
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ERR:	Unsupported Error, completion:
> + *						none
> + * @CPPI5_TR_RESPONSE_STATUS_TRANSFER_EXCEPTION: Transfer Exception, completion:
> + *						partially completed
> + * @CPPI5_TR_RESPONSE_STATUS__TEARDOWN_FLUSH:	Teardown Flush, completion: none
> + */
> +enum cppi5_tr_resp_status_type {
> +	CPPI5_TR_RESPONSE_STATUS_NONE,
> +	CPPI5_TR_RESPONSE_STATUS_TRANSFER_ERR,
> +	CPPI5_TR_RESPONSE_STATUS_ABORTED_ERR,
> +	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ERR,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ERR,
> +	CPPI5_TR_RESPONSE_STATUS_TRANSFER_EXCEPTION,
> +	CPPI5_TR_RESPONSE_STATUS__TEARDOWN_FLUSH,
> +	CPPI5_TR_RESPONSE_STATUS_MAX
> +};
> +
> +/**
> + * enum cppi5_tr_resp_status_submission - TR Response Status field values which
> + *					  corresponds Submission Error
> + * @CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ICNT0:	ICNT0 was 0
> + * @CPPI5_TR_RESPONSE_STATUS_SUBMISSION_FIFO_FULL: Channel FIFO was full when TR
> + *						received
> + * @CPPI5_TR_RESPONSE_STATUS_SUBMISSION_OWN:	Channel is not owned by the
> + *						submitter
> + */
> +enum cppi5_tr_resp_status_submission {
> +	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ICNT0,
> +	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_FIFO_FULL,
> +	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_OWN,
> +	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_MAX
> +};
> +
> +/**
> + * enum cppi5_tr_resp_status_unsupported - TR Response Status field values which
> + *					   corresponds Unsupported Error
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_TR_TYPE:	TR Type not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_STATIC:	STATIC not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_EOL:		EOL not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_CFG_SPECIFIC:	CONFIGURATION SPECIFIC
> + *							not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_AMODE:		AMODE not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ELTYPE:	ELTYPE not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_DFMT:		DFMT not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_SECTR:		SECTR not supported
> + * @CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_AMODE_SPECIFIC: AMODE SPECIFIC field
> + *							not supported
> + */
> +enum cppi5_tr_resp_status_unsupported {
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_TR_TYPE,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_STATIC,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_EOL,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_CFG_SPECIFIC,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_AMODE,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ELTYPE,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_DFMT,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_SECTR,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_AMODE_SPECIFIC,
> +	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_MAX
> +};
> +
> +/**
> + * cppi5_trdesc_calc_size - Calculate TR Descriptor size
> + * @tr_count: number of TR records
> + * @tr_size: Nominal size of TR record (max) [16, 32, 64, 128]
> + *
> + * Returns required TR Descriptor size
> + */
> +static inline size_t cppi5_trdesc_calc_size(u32 tr_count, u32 tr_size)
> +{
> +	/*
> +	 * The Size of a TR descriptor is:
> +	 * 1 x tr_size : the first 16 bytes is used by the packet info block +
> +	 * tr_count x tr_size : Transfer Request Records +
> +	 * tr_count x sizeof(struct cppi5_tr_resp_t) : Transfer Response Records
> +	 */
> +	return tr_size * (tr_count + 1) +
> +		sizeof(struct cppi5_tr_resp_t) * tr_count;
> +}
> +
> +/**
> + * cppi5_trdesc_init - Init TR Descriptor
> + * @desc: TR Descriptor
> + * @tr_count: number of TR records
> + * @tr_size: Nominal size of TR record (max) [16, 32, 64, 128]
> + * @reload_idx: Absolute index to jump to on the 2nd and following passes
> + *		through the TR packet.
> + * @reload_count: Number of times to jump from last entry to reload_idx. 0x1ff
> + *		  indicates infinite looping.
> + *
> + * Init TR Descriptor
> + */
> +static inline void cppi5_trdesc_init(struct cppi5_desc_hdr_t *desc_hdr,
> +				     u32 tr_count, u32 tr_size, u32 reload_idx,
> +				     u32 reload_count)
> +{
> +	desc_hdr->pkt_info0 = CPPI5_INFO0_DESC_TYPE_VAL_TR <<
> +			      CPPI5_INFO0_HDESC_TYPE_SHIFT;
> +	desc_hdr->pkt_info0 |= (reload_count << CPPI5_INFO0_TRDESC_RLDCNT_SHIFT) &
> +			       CPPI5_INFO0_TRDESC_RLDCNT_MASK;
> +	desc_hdr->pkt_info0 |= (reload_idx << CPPI5_INFO0_TRDESC_RLDIDX_SHIFT) &
> +			       CPPI5_INFO0_TRDESC_RLDIDX_MASK;
> +	desc_hdr->pkt_info0 |= (tr_count - 1) & CPPI5_INFO0_TRDESC_LASTIDX_MASK;
> +
> +	desc_hdr->pkt_info1 |= ((ffs(tr_size >> 4) - 1) <<
> +				CPPI5_INFO1_TRDESC_RECSIZE_SHIFT) &
> +				CPPI5_INFO1_TRDESC_RECSIZE_MASK;
> +}
> +
> +/**
> + * cppi5_tr_init - Init TR record
> + * @flags: Pointer to the TR's flags
> + * @type: TR type
> + * @static_tr: TR is static
> + * @wait: Wait for TR completion before allow the next TR to start
> + * @event_size: output event generation cfg
> + * @cmd_id: TR identifier (application specifics)
> + *
> + * Init TR record
> + */
> +static inline void cppi5_tr_init(cppi5_tr_flags_t *flags,
> +				 enum cppi5_tr_types type, bool static_tr,
> +				 bool wait, enum cppi5_tr_event_size event_size,
> +				 u32 cmd_id)
> +{
> +	*flags = type;
> +	*flags |= (event_size << CPPI5_TR_EVENT_SIZE_SHIFT) &
> +		  CPPI5_TR_EVENT_SIZE_MASK;
> +
> +	*flags |= (cmd_id << CPPI5_TR_CMD_ID_SHIFT) &
> +		  CPPI5_TR_CMD_ID_MASK;
> +
> +	if (static_tr && (type == CPPI5_TR_TYPE8 || type == CPPI5_TR_TYPE9))
> +		*flags |= CPPI5_TR_STATIC;
> +
> +	if (wait)
> +		*flags |= CPPI5_TR_WAIT;
> +}
> +
> +/**
> + * cppi5_tr_set_trigger - Configure trigger0/1 and trigger0/1_type
> + * @flags: Pointer to the TR's flags
> + * @trigger0: trigger0 selection
> + * @trigger0_type: type of data transfer that will be enabled by trigger0
> + * @trigger1: trigger1 selection
> + * @trigger1_type: type of data transfer that will be enabled by trigger1
> + *
> + * Configure the triggers for the TR
> + */
> +static inline void cppi5_tr_set_trigger(cppi5_tr_flags_t *flags,
> +		enum cppi5_tr_trigger trigger0,
> +		enum cppi5_tr_trigger_type trigger0_type,
> +		enum cppi5_tr_trigger trigger1,
> +		enum cppi5_tr_trigger_type trigger1_type)
> +{
> +	*flags |= (trigger0 << CPPI5_TR_TRIGGER0_SHIFT) &
> +		  CPPI5_TR_TRIGGER0_MASK;
> +	*flags |= (trigger0_type << CPPI5_TR_TRIGGER0_TYPE_SHIFT) &
> +		  CPPI5_TR_TRIGGER0_TYPE_MASK;
> +
> +	*flags |= (trigger1 << CPPI5_TR_TRIGGER1_SHIFT) &
> +		  CPPI5_TR_TRIGGER1_MASK;
> +	*flags |= (trigger1_type << CPPI5_TR_TRIGGER1_TYPE_SHIFT) &
> +		  CPPI5_TR_TRIGGER1_TYPE_MASK;
> +}
> +
> +/**
> + * cppi5_tr_cflag_set - Update the Configuration specific flags
> + * @flags: Pointer to the TR's flags
> + * @csf: Configuration specific flags
> + *
> + * Set a bit in Configuration Specific Flags section of the TR flags.
> + */
> +static inline void cppi5_tr_csf_set(cppi5_tr_flags_t *flags, u32 csf)
> +{
> +	*flags |= (csf << CPPI5_TR_CSF_FLAGS_SHIFT) &
> +		  CPPI5_TR_CSF_FLAGS_MASK;
> +}
> +
> +#endif /* __TI_CPPI5_H__ */
> 

--
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