--- /dev/null
+/* 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>
+
+/**
+ * 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__ */
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