u-boot/include/linux/soc/ti/cppi5.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * CPPI5 descriptors interface
 *
 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
 */

#ifndef __TI_CPPI5_H__
#define __TI_CPPI5_H__

#include <hexdump.h>
#include <linux/bitops.h>
#include <linux/bug.h>

/**
 * Descriptor header, present in all types of descriptors
 */
struct cppi5_desc_hdr_t {
	u32 pkt_info0;	/* Packet info word 0 (n/a in Buffer desc) */
	u32 pkt_info1;	/* Packet info word 1 (n/a in Buffer desc) */
	u32 pkt_info2;	/* Packet info word 2 Buffer reclamation info */
	u32 src_dst_tag; /* Packet info word 3 (n/a in Buffer desc) */
} __packed;

/**
 * Host-mode packet and buffer descriptor definition
 */
struct cppi5_host_desc_t {
	struct cppi5_desc_hdr_t hdr;
	u64 next_desc;	/* w4/5: Linking word */
	u64 buf_ptr;	/* w6/7: Buffer pointer */
	u32 buf_info1;	/* w8: Buffer valid data length */
	u32 org_buf_len; /* w9: Original buffer length */
	u64 org_buf_ptr; /* w10/11: Original buffer pointer */
	u32 epib[0];	/* Extended Packet Info Data (optional, 4 words) */
	/*
	 * Protocol Specific Data (optional, 0-128 bytes in multiples of 4),
	 * and/or Other Software Data (0-N bytes, optional)
	 */
} __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)

/*
 * Host Packet Descriptor Extended Packet Info Block
 */
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 */
};

/**
 * Monolithic-mode packet descriptor
 */
struct cppi5_monolithic_desc_t {
	struct cppi5_desc_hdr_t hdr;
	u32 epib[0];	/* Extended Packet Info Data (optional, 4 words) */
	/*
	 * Protocol Specific Data (optional, 0-128 bytes in multiples of 4),
	 *  and/or Other Software Data (0-N bytes, optional)
	 */
};

#define CPPI5_INFO2_MDESC_DATA_OFFSET_SHIFT	(18U)
#define CPPI5_INFO2_MDESC_DATA_OFFSET_MASK	GENMASK(26, 18)

/*
 * Reload Enable:
 * 0 = Finish the packet and place the descriptor back on the return queue
 * 1 = Vector to the Reload Index and resume processing
 */
#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);
}

/**
 * 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)
{
	WARN_ON(!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)
{
	WARN_ON(!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)
{
	WARN_ON(!desc_hdr);

	*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)
{
	WARN_ON(!desc_hdr);

	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)
{
	WARN_ON(!desc_hdr);

	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)
{
	WARN_ON(!desc_hdr);

	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)
{
	WARN_ON(!desc_hdr);

	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;
	//TODO_GS: align
	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)
{
	WARN_ON(!desc);
	WARN_ON(psdata_size > CPPI5_INFO0_HDESC_PSDATA_MAX_SIZE);
	WARN_ON(flags & ~(CPPI5_INFO0_HDESC_EPIB_PRESENT |
			  CPPI5_INFO0_HDESC_PSINFO_LOCATION));

	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)
{
	WARN_ON(!desc);
	WARN_ON(flags & ~(CPPI5_INFO0_HDESC_EPIB_PRESENT |
			  CPPI5_INFO0_HDESC_PSINFO_LOCATION));

	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)
{
	WARN_ON(!desc);
	WARN_ON(psdata_size > CPPI5_INFO0_HDESC_PSDATA_MAX_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;

	WARN_ON(!desc);

	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)
{
	WARN_ON(!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)
{
	WARN_ON(!desc);

	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)
{
	WARN_ON(!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)
{
	WARN_ON(!desc);

	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)
{
	WARN_ON(!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)
{
	WARN_ON(!desc);
	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)
{
	WARN_ON(!desc);
	WARN_ON(!buf && !obuf);

	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)
{
	WARN_ON(!desc);
	WARN_ON(!obuf);
	WARN_ON(!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)
{
	WARN_ON(!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)
{
	WARN_ON(!desc);
	WARN_ON(!hbuf_desc);

	desc->next_desc = hbuf_desc;
}

static inline dma_addr_t cppi5_hdesc_get_next_hbdesc(
				struct cppi5_host_desc_t *desc)
{
	WARN_ON(!desc);

	return (dma_addr_t)desc->next_desc;
}

static inline void cppi5_hdesc_reset_hbdesc(struct cppi5_host_desc_t *desc)
{
	WARN_ON(!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)
{
	WARN_ON(!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;

	WARN_ON(!desc);

	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;

	WARN_ON(!desc);

	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)

/* Udmap TR flags Type field specifies the type of TR. */
enum cppi5_tr_types {
	/* type0: One dimensional data move */
	CPPI5_TR_TYPE0 = 0,
	/* type1: Two dimensional data move */
	CPPI5_TR_TYPE1,
	/* type2: Three dimensional data move */
	CPPI5_TR_TYPE2,
	/* type3: Four dimensional data move */
	CPPI5_TR_TYPE3,
	/* type4: Four dimensional data move with data formatting */
	CPPI5_TR_TYPE4,
	/* type5: Four dimensional Cache Warm */
	CPPI5_TR_TYPE5,
	/* type6-7: Reserved */
	/* type8: Four Dimensional Block Move */
	CPPI5_TR_TYPE8 = 8,
	/* type9: Four Dimensional Block Move with Repacking */
	CPPI5_TR_TYPE9,
	/* type10: Two Dimensional Block Move */
	CPPI5_TR_TYPE10,
	/* type11: Two Dimensional Block Move with Repacking */
	CPPI5_TR_TYPE11,
	/* type12-14: Reserved */
	/* type15 Four Dimensional Block Move with Repacking and Indirection */
	CPPI5_TR_TYPE15 = 15,
	CPPI5_TR_TYPE_MAX
};

/*
 * Udmap TR Flags EVENT_SIZE field specifies when an event is generated
 * for each TR.
 */
enum cppi5_tr_event_size {
	/* When TR is complete and all status for the TR has been received */
	CPPI5_TR_EVENT_SIZE_COMPLETION,
	/*
	 * Type 0: when the last data transaction is sent for the TR;
	 * Type 1-11: when ICNT1 is decremented
	 */
	CPPI5_TR_EVENT_SIZE_ICNT1_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_ICNT2_DEC,
	/*
	 * Type 0-2,10-11: when the last data transaction is sent for the TR;
	 * All other types: when ICNT3 is decremented
	 */
	CPPI5_TR_EVENT_SIZE_ICNT3_DEC,
	CPPI5_TR_EVENT_SIZE_MAX
};

/*
 * Udmap TR Flags TRIGGERx field specifies the type of trigger used to
 * enable the TR to transfer data as specified by TRIGGERx_TYPE field.
 */
enum cppi5_tr_trigger {
	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 */
	CPPI5_TR_TRIGGER_MAX
};

/*
 * Udmap TR Flags TRIGGERx_TYPE field specifies the type of data transfer
 * that will be enabled by receiving a trigger as specified by TRIGGERx.
 */
enum cppi5_tr_trigger_type {
	/* The second inner most loop (ICNT1) will be decremented by 1 */
	CPPI5_TR_TRIGGER_TYPE_ICNT1_DEC,
	/* The third inner most loop (ICNT2) will be decremented by 1 */
	CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC,
	/* The outer most loop (ICNT3) will be decremented by 1 */
	CPPI5_TR_TRIGGER_TYPE_ICNT3_DEC,
	/* The entire TR will be allowed to complete */
	CPPI5_TR_TRIGGER_TYPE_ALL,
	CPPI5_TR_TRIGGER_TYPE_MAX
};

typedef u32 cppi5_tr_flags_t;

/* Type 0 (One dimensional data move) TR (16 byte) */
struct cppi5_tr_type0_t {
	cppi5_tr_flags_t flags;
	u16 icnt0;
	u16 unused;
	u64 addr;
} __aligned(16) __packed;

/* Type 1 (Two dimensional data move) TR (32 byte) */
struct cppi5_tr_type1_t {
	cppi5_tr_flags_t flags;
	u16 icnt0;
	u16 icnt1;
	u64 addr;
	s32 dim1;
} __aligned(32) __packed;

/* Type 2 (Three dimensional data move) TR (32 byte) */
struct cppi5_tr_type2_t {
	cppi5_tr_flags_t flags;
	u16 icnt0;
	u16 icnt1;
	u64 addr;
	s32 dim1;
	u16 icnt2;
	u16 unused;
	s32 dim2;
} __aligned(32) __packed;

/* Type 3 (Four dimensional data move) TR (32 byte) */
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;

/*
 * Type 15 (Four Dimensional Block Copy with Repacking and
 * Indirection Support) TR (64 byte).
 */
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 {
	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)

/*
 * Udmap TR Response Status Type field is used to determine
 * what type of status is being returned.
 */
enum cppi5_tr_resp_status_type {
	CPPI5_TR_RESPONSE_STATUS_COMPLETE,		/* None */
	CPPI5_TR_RESPONSE_STATUS_TRANSFER_ERR,		/* Transfer Error */
	CPPI5_TR_RESPONSE_STATUS_ABORTED_ERR,		/* Aborted Error */
	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ERR,	/* Submission Error */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ERR,	/* Unsup. Feature */
	CPPI5_TR_RESPONSE_STATUS_MAX
};

/*
 * Udmap TR Response Status field values which corresponds
 * CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ERR
 */
enum cppi5_tr_resp_status_submission {
	/* ICNT0 was 0 */
	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_ICNT0,
	/* Channel FIFO was full when TR received */
	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_FIFO_FULL,
	/* Channel is not owned by the submitter */
	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_OWN,
	CPPI5_TR_RESPONSE_STATUS_SUBMISSION_MAX
};

/*
 * Udmap TR Response Status field values which corresponds
 * CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ERR
 */
enum cppi5_tr_resp_status_unsupported {
	/* TR Type not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_TR_TYPE,
	/* STATIC not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_STATIC,
	/* EOL not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_EOL,
	/* CONFIGURATION SPECIFIC not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_CFG_SPECIFIC,
	/* AMODE not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_AMODE,
	/* ELTYPE not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_ELTYPE,
	/* DFMT not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_DFMT,
	/* SECTR not supported */
	CPPI5_TR_RESPONSE_STATUS_UNSUPPORTED_SECTR,
	/* AMODE SPECIFIC field not supported */
	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)
{
	WARN_ON(!desc_hdr);
	WARN_ON(tr_count & ~CPPI5_INFO0_TRDESC_LASTIDX_MASK);
	WARN_ON(reload_idx > CPPI5_INFO0_TRDESC_RLDIDX_MAX);
	WARN_ON(reload_count > CPPI5_INFO0_TRDESC_RLDCNT_MAX);

	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)
{
	WARN_ON(!flags);

	*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)
{
	WARN_ON(!flags);

	*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)
{
	WARN_ON(!flags);

	*flags |= (csf << CPPI5_TR_CSF_FLAGS_SHIFT) &
		  CPPI5_TR_CSF_FLAGS_MASK;
}

#endif /* __TI_CPPI5_H__ */