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linux-next/include/linux/dma/ti-cppi5.h
Gustavo A. R. Silva a4147d855f dmaengine: ti-cppi5: Replace zero-length array with flexible-array member 
There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure. Kernel code should
always use “flexible array members”[1] for these cases. The older style of
one-element or zero-length arrays should no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arrays

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-10-29 17:22:59 -05:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* CPPI5 descriptors interface
*
* Copyright (C) 2019 Texas Instruments Incorporated - https://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)
* @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[];
} __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_INFO1_DESC_FLOWID_DEFAULT CPPI5_INFO1_DESC_FLOWID_MASK
#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_RETP_MASK GENMASK(18, 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[];
};
#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 &= ~(CPPI5_INFO1_DESC_PKTID_MASK |
CPPI5_INFO1_DESC_FLOWID_MASK);
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 &= ~(CPPI5_INFO2_DESC_RETP_MASK |
CPPI5_INFO2_DESC_RETQ_MASK);
desc_hdr->pkt_info2 |= flags & CPPI5_INFO2_DESC_RETP_MASK;
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 &= ~CPPI5_INFO0_HDESC_PKTLEN_MASK;
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 &= ~CPPI5_INFO1_HDESC_PSFLGS_MASK;
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 &= ~CPPI5_INFO2_HDESC_PKTTYPE_MASK;
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;
}
/**
* 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 &= ~(CPPI5_TR_TRIGGER0_MASK | CPPI5_TR_TRIGGER0_TYPE_MASK |
CPPI5_TR_TRIGGER1_MASK | CPPI5_TR_TRIGGER1_TYPE_MASK);
*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 &= ~CPPI5_TR_CSF_FLAGS_MASK;
*flags |= (csf << CPPI5_TR_CSF_FLAGS_SHIFT) &
CPPI5_TR_CSF_FLAGS_MASK;
}
#endif /* __TI_CPPI5_H__ */
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