Re: [PATCH V3 XRT Alveo 03/18] fpga: xrt: xclbin file helper functions

Tom Rix
2021-02-21T17:14:33Z

On 2/17/21 10:40 PM, Lizhi Hou wrote:
> Alveo FPGA firmware and partial reconfigure file are in xclbin format.
This code enumerates and extracts
> Add
> code to enumerate and extract sections from xclbin files. xclbin.h is cross
> platform and used across all platforms and OS
>
> Signed-off-by: Sonal Santan <sonal.santan@xilinx.com>
> Signed-off-by: Max Zhen <max.zhen@xilinx.com>
> Signed-off-by: Lizhi Hou <lizhih@xilinx.com>
> ---
> drivers/fpga/xrt/include/xclbin-helper.h | 52 +++
> drivers/fpga/xrt/lib/xclbin.c | 394 ++++++++++++++++++++++
> include/uapi/linux/xrt/xclbin.h | 408 +++++++++++++++++++++++
> 3 files changed, 854 insertions(+)
> create mode 100644 drivers/fpga/xrt/include/xclbin-helper.h
> create mode 100644 drivers/fpga/xrt/lib/xclbin.c
> create mode 100644 include/uapi/linux/xrt/xclbin.h
>
> diff --git a/drivers/fpga/xrt/include/xclbin-helper.h b/drivers/fpga/xrt/include/xclbin-helper.h
> new file mode 100644
> index 000000000000..68218efc9d0b
> --- /dev/null
> +++ b/drivers/fpga/xrt/include/xclbin-helper.h
> @@ -0,0 +1,52 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Header file for Xilinx Runtime (XRT) driver
> + *
> + * Copyright (C) 2020-2021 Xilinx, Inc.
> + *
> + * Authors:
> + * David Zhang <davidzha@xilinx.com>
> + * Sonal Santan <sonal.santan@xilinx.com>
> + */
> +
> +#ifndef _XRT_XCLBIN_H
> +#define _XRT_XCLBIN_H

The header guard should match the filename.

> +
> +#include <linux/types.h>
> +#include <linux/device.h>
> +#include <linux/xrt/xclbin.h>
> +
> +#define ICAP_XCLBIN_V2 "xclbin2"
> +#define DMA_HWICAP_BITFILE_BUFFER_SIZE 1024
> +#define MAX_XCLBIN_SIZE (1024 * 1024 * 1024) /* Assuming xclbin <= 1G, always */
#defines should have a prefix, maybe XRT_ or XCLBIN_
> +
> +enum axlf_section_kind;
> +struct axlf;
> +
> +/**
> + * Bitstream header information as defined by Xilinx tools.
> + * Please note that this struct definition is not owned by the driver.
> + */
> +struct hw_icap_bit_header {

File headers usually have fixed length fields like uint32_t

Is this a structure the real header is converted into ?

> + unsigned int header_length; /* Length of header in 32 bit words */
> + unsigned int bitstream_length; /* Length of bitstream to read in bytes*/
> + unsigned char *design_name; /* Design name get from bitstream */
> + unsigned char *part_name; /* Part name read from bitstream */
> + unsigned char *date; /* Date read from bitstream header */
> + unsigned char *time; /* Bitstream creation time */
> + unsigned int magic_length; /* Length of the magic numbers */
> + unsigned char *version; /* Version string */
> +};
> +
> +const char *xrt_xclbin_kind_to_string(enum axlf_section_kind kind);

Only add decl's that are using in multiple files.

This is only defined in xclbin.c, why does it need to be in the header ?

> +int xrt_xclbin_get_section(const struct axlf *xclbin,
> + enum axlf_section_kind kind, void **data,
> + uint64_t *len);
> +int xrt_xclbin_get_metadata(struct device *dev, const struct axlf *xclbin, char **dtb);
> +int xrt_xclbin_parse_bitstream_header(const unsigned char *data,
> + unsigned int size,
> + struct hw_icap_bit_header *header);
> +void xrt_xclbin_free_header(struct hw_icap_bit_header *header);
> +const char *xrt_clock_type2epname(enum CLOCK_TYPE type);
CLOCK_TYPE needs a prefix, something like XCLBIN_CLOCK_TYPE
> +
> +#endif /* _XRT_XCLBIN_H */
> diff --git a/drivers/fpga/xrt/lib/xclbin.c b/drivers/fpga/xrt/lib/xclbin.c
> new file mode 100644
> index 000000000000..47dc6ca25c1b
> --- /dev/null
> +++ b/drivers/fpga/xrt/lib/xclbin.c
> @@ -0,0 +1,394 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Xilinx Alveo FPGA Driver XCLBIN parser
> + *
> + * Copyright (C) 2020-2021 Xilinx, Inc.
> + *
> + * Authors: David Zhang <davidzha@xilinx.com>
> + */
> +
> +#include <asm/errno.h>
> +#include <linux/vmalloc.h>
> +#include <linux/device.h>
> +#include "xclbin-helper.h"
> +#include "metadata.h"
> +
What is XHI ?  Maybe expand this, at the lease should comment
> +/* Used for parsing bitstream header */
> +#define XHI_EVEN_MAGIC_BYTE 0x0f
> +#define XHI_ODD_MAGIC_BYTE 0xf0
> +
> +/* Extra mode for IDLE */
> +#define XHI_OP_IDLE -1
> +#define XHI_BIT_HEADER_FAILURE -1
> +
> +/* The imaginary module length register */
> +#define XHI_MLR 15
> +
> +static inline unsigned char xhi_data_and_inc(const unsigned char *d, int *i, int sz)
could move to the *.h
> +{_
> + unsigned char data;
> +
> + if (*i >= sz)
> + return -1;
The return value of this funtion is not always checked, at the least add a dev_err here
> +
> + data = d[*i];
> + (*i)++;
> +
> + return data;
> +}
> +
> +static const struct axlf_section_header *
> +xrt_xclbin_get_section_hdr(const struct axlf *xclbin,
> + enum axlf_section_kind kind)
> +{
> + int i = 0;
> +
> + for (i = 0; i < xclbin->m_header.m_numSections; i++) {
> + if (xclbin->m_sections[i].m_sectionKind == kind)
> + return &xclbin->m_sections[i];
> + }
> +
> + return NULL;
> +}
> +
> +static int
> +xrt_xclbin_check_section_hdr(const struct axlf_section_header *header,
> + u64 xclbin_len)
> +{
> + int ret;
> +
> + ret = (header->m_sectionOffset + header->m_sectionSize) > xclbin_len ? -EINVAL : 0;

Tristate is harder to read, consider replacing with if()

int ret = 0

if ()

ret =

> +
> + return ret;
> +}
> +
> +static int xrt_xclbin_section_info(const struct axlf *xclbin,
> + enum axlf_section_kind kind,
> + u64 *offset, u64 *size)
> +{
> + const struct axlf_section_header *mem_header = NULL;
> + u64 xclbin_len;
> + int err = 0;
> +
> + mem_header = xrt_xclbin_get_section_hdr(xclbin, kind);
> + if (!mem_header)
> + return -EINVAL;
> +
> + xclbin_len = xclbin->m_header.m_length;
> + if (xclbin_len > MAX_XCLBIN_SIZE)
> + return -EINVAL;

This check can be added to the function call..

or the sanity checking added to the earier call to *get_section_hdr

There a number of small functions that can be combined.

> +
> + err = xrt_xclbin_check_section_hdr(mem_header, xclbin_len);
> + if (err)
> + return err;
> +
> + *offset = mem_header->m_sectionOffset;
> + *size = mem_header->m_sectionSize;
> +
> + return 0;
> +}
> +
> +/* caller should free the allocated memory for **data */

must free

This comment also needs to be with the *.h decl

> +int xrt_xclbin_get_section(const struct axlf *buf,
> + enum axlf_section_kind kind,
> + void **data, u64 *len)
> +{
> + const struct axlf *xclbin = (const struct axlf *)buf;
> + void *section = NULL;
> + int err = 0;
> + u64 offset = 0;
> + u64 size = 0;
> +
> + err = xrt_xclbin_section_info(xclbin, kind, &offset, &size);
> + if (err)
> + return err;
> +
> + section = vmalloc(size);
> + if (!section)
> + return -ENOMEM;
> +
> + memcpy(section, ((const char *)xclbin) + offset, size);
> +
> + *data = section;

a general comment

for exported function checking the validity of the inputs in more important.

here you assume **data is valid, really you should check.

> + if (len)
> + *len = size;
len setting being optional, needs to be in the *.h comment
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(xrt_xclbin_get_section);
> +
Instead of allocating new memory and making copies of bits of *data

why not have the points reference data ?

The size operations look like translating big endian data to little endian.

This will break on a big endian host.

> +/* parse bitstream header */
> +int xrt_xclbin_parse_bitstream_header(const unsigned char *data,
> + unsigned int size,
> + struct hw_icap_bit_header *header)
> +{
> + unsigned int index;
> + unsigned int len;
> + unsigned int tmp;
> + unsigned int i;
> +
> + memset(header, 0, sizeof(*header));
> + /* Start Index at start of bitstream */
> + index = 0;
> +
> + /* Initialize HeaderLength. If header returned early inidicates
> + * failure.

This side effect should be documented in the *.h comment.

Also the multi line comment is a bit weird, not sure if it is ok

> + */
> + header->header_length = XHI_BIT_HEADER_FAILURE;
> +
> + /* Get "Magic" length */
> + header->magic_length = xhi_data_and_inc(data, &index, size);
> + header->magic_length = (header->magic_length << 8) | xhi_data_and_inc(data, &index, size);
> +
> + /* Read in "magic" */
> + for (i = 0; i < header->magic_length - 1; i++) {
> + tmp = xhi_data_and_inc(data, &index, size);
> + if (i % 2 == 0 && tmp != XHI_EVEN_MAGIC_BYTE)
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + if (i % 2 == 1 && tmp != XHI_ODD_MAGIC_BYTE)
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> + }
> +
> + /* Read null end of magic data. */
> + tmp = xhi_data_and_inc(data, &index, size);
> +
> + /* Read 0x01 (short) */
> + tmp = xhi_data_and_inc(data, &index, size);
> + tmp = (tmp << 8) | xhi_data_and_inc(data, &index, size);
> +
> + /* Check the "0x01" half word */
> + if (tmp != 0x01)
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + /* Read 'a' */
> + tmp = xhi_data_and_inc(data, &index, size);
> + if (tmp != 'a')
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + /* Get Design Name length */
> + len = xhi_data_and_inc(data, &index, size);
> + len = (len << 8) | xhi_data_and_inc(data, &index, size);
> +
> + /* allocate space for design name and final null character. */
> + header->design_name = vmalloc(len);
> + if (!header->design_name)
> + return -ENOMEM;
> +
> + /* Read in Design Name */
> + for (i = 0; i < len; i++)
> + header->design_name[i] = xhi_data_and_inc(data, &index, size);
> +
> + if (header->design_name[len - 1] != '\0')
> + return -1;
> +
> + header->version = strstr(header->design_name, "Version=") + strlen("Version=");
> +
> + /* Read 'b' */
> + tmp = xhi_data_and_inc(data, &index, size);
> + if (tmp != 'b')
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + /* Get Part Name length */
> + len = xhi_data_and_inc(data, &index, size);
> + len = (len << 8) | xhi_data_and_inc(data, &index, size);
> +
> + /* allocate space for part name and final null character. */
> + header->part_name = vmalloc(len);
> + if (!header->part_name)
> + return -ENOMEM;
> +
> + /* Read in part name */
> + for (i = 0; i < len; i++)
> + header->part_name[i] = xhi_data_and_inc(data, &index, size);
> +
> + if (header->part_name[len - 1] != '\0')
> + return -1;
> +
> + /* Read 'c' */
> + tmp = xhi_data_and_inc(data, &index, size);
> + if (tmp != 'c')
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + /* Get date length */
> + len = xhi_data_and_inc(data, &index, size);
> + len = (len << 8) | xhi_data_and_inc(data, &index, size);
> +
> + /* allocate space for date and final null character. */
> + header->date = vmalloc(len);
> + if (!header->date)
> + return -ENOMEM;
> +
> + /* Read in date name */
> + for (i = 0; i < len; i++)
> + header->date[i] = xhi_data_and_inc(data, &index, size);
> +
> + if (header->date[len - 1] != '\0')
> + return -1;
generally -EINVAL is more meaningful than -1
> +
> + /* Read 'd' */
> + tmp = xhi_data_and_inc(data, &index, size);
> + if (tmp != 'd')
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + /* Get time length */
> + len = xhi_data_and_inc(data, &index, size);
> + len = (len << 8) | xhi_data_and_inc(data, &index, size);
> +
> + /* allocate space for time and final null character. */
> + header->time = vmalloc(len);
> + if (!header->time)
> + return -ENOMEM;
> +
> + /* Read in time name */
> + for (i = 0; i < len; i++)
> + header->time[i] = xhi_data_and_inc(data, &index, size);
> +
> + if (header->time[len - 1] != '\0')
> + return -1;
> +
> + /* Read 'e' */
> + tmp = xhi_data_and_inc(data, &index, size);
> + if (tmp != 'e')
> + return -1; /* INVALID_FILE_HEADER_ERROR */
> +
> + /* Get byte length of bitstream */
> + header->bitstream_length = xhi_data_and_inc(data, &index, size);
> + header->bitstream_length = (header->bitstream_length << 8) |
> + xhi_data_and_inc(data, &index, size);
> + header->bitstream_length = (header->bitstream_length << 8) |
> + xhi_data_and_inc(data, &index, size);
> + header->bitstream_length = (header->bitstream_length << 8) |
> + xhi_data_and_inc(data, &index, size);

generally a problem

This is confusing, collect the bytes in a temp[] and construct the header->bitstream_length in on statement.

This is a case where xhi_data_and_inc return is not checked and if it failed could blow up later.

> +
> + header->header_length = index;

index is not a good variable name if it going to be stored as a length.

consider changing it to something like current_length.

> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(xrt_xclbin_parse_bitstream_header);
> +
> +void xrt_xclbin_free_header(struct hw_icap_bit_header *header)
> +{
> + vfree(header->design_name);
> + vfree(header->part_name);
> + vfree(header->date);
> + vfree(header->time);
missing header->version
> +}
> +EXPORT_SYMBOL_GPL(xrt_xclbin_free_header);
> +
> +struct xrt_clock_desc {
> + char *clock_ep_name;
> + u32 clock_xclbin_type;
> + char *clkfreq_ep_name;
> +} clock_desc[] = {
> + {
> + .clock_ep_name = XRT_MD_NODE_CLK_KERNEL1,
> + .clock_xclbin_type = CT_DATA,
> + .clkfreq_ep_name = XRT_MD_NODE_CLKFREQ_K1,
> + },
> + {
> + .clock_ep_name = XRT_MD_NODE_CLK_KERNEL2,
> + .clock_xclbin_type = CT_KERNEL,
> + .clkfreq_ep_name = XRT_MD_NODE_CLKFREQ_K2,
> + },
> + {
> + .clock_ep_name = XRT_MD_NODE_CLK_KERNEL3,
> + .clock_xclbin_type = CT_SYSTEM,
> + .clkfreq_ep_name = XRT_MD_NODE_CLKFREQ_HBM,
> + },
> +};
> +
> +const char *xrt_clock_type2epname(enum CLOCK_TYPE type)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(clock_desc); i++) {
> + if (clock_desc[i].clock_xclbin_type == type)
> + return clock_desc[i].clock_ep_name;
> + }
> + return NULL;
> +}
> +EXPORT_SYMBOL_GPL(xrt_clock_type2epname);

What is clock stuff doing in xclbin ?

I think clock needs its own file

> +
> +static const char *clock_type2clkfreq_name(u32 type)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(clock_desc); i++) {
> + if (clock_desc[i].clock_xclbin_type == type)
> + return clock_desc[i].clkfreq_ep_name;
> + }
> + return NULL;
> +}
> +
> +static int xrt_xclbin_add_clock_metadata(struct device *dev,
> + const struct axlf *xclbin,
> + char *dtb)
> +{
> + int i;
> + u16 freq;
> + struct clock_freq_topology *clock_topo;
> + int rc = xrt_xclbin_get_section(xclbin, CLOCK_FREQ_TOPOLOGY,
> + (void **)&clock_topo, NULL);
> +
> + if (rc)
> + return 0;
failing is ok ?
> +
> + for (i = 0; i < clock_topo->m_count; i++) {
> + u8 type = clock_topo->m_clock_freq[i].m_type;
> + const char *ep_name = xrt_clock_type2epname(type);
> + const char *counter_name = clock_type2clkfreq_name(type);
> +
> + if (!ep_name || !counter_name)
> + continue;
> +
> + freq = cpu_to_be16(clock_topo->m_clock_freq[i].m_freq_Mhz);
> + rc = xrt_md_set_prop(dev, dtb, ep_name, NULL, XRT_MD_PROP_CLK_FREQ,
> + &freq, sizeof(freq));
> + if (rc)
> + break;
> +
> + rc = xrt_md_set_prop(dev, dtb, ep_name, NULL, XRT_MD_PROP_CLK_CNT,
> + counter_name, strlen(counter_name) + 1);
> + if (rc)
> + break;
Failing in a loop, why isn't there some cleanup of the *set_prop() calls ?
> + }
> +
> + vfree(clock_topo);
> +
> + return rc;
> +}
> +
> +int xrt_xclbin_get_metadata(struct device *dev, const struct axlf *xclbin, char **dtb)
> +{
> + char *md = NULL, *newmd = NULL;
> + u64 len;
*dtb = NULL;
> + int rc = xrt_xclbin_get_section(xclbin, PARTITION_METADATA,
> + (void **)&md, &len);
> +
> + if (rc)
> + goto done;
> +
> + /* Sanity check the dtb section. */
> + if (xrt_md_size(dev, md) > len) {
> + rc = -EINVAL;
> + goto done;
> + }
> +
> + newmd = xrt_md_dup(dev, md);
> + if (!newmd) {
> + rc = -EFAULT;
> + goto done;
> + }
> + /* Convert various needed xclbin sections into dtb. */
> + rc = xrt_xclbin_add_clock_metadata(dev, xclbin, newmd);

newmd is only valid here, but the above error handling jump here. change this to

if (!rc)

*dtb = newmd

else

vfree(newmd)

done:

vfree(md)

return rc;

> +
> +done:
> + if (rc == 0)
> + *dtb = newmd;
> + else
> + vfree(newmd);
> + vfree(md);
> + return rc;
> +}
> +EXPORT_SYMBOL_GPL(xrt_xclbin_get_metadata);
> diff --git a/include/uapi/linux/xrt/xclbin.h b/include/uapi/linux/xrt/xclbin.h
> new file mode 100644
> index 000000000000..53f140123ef1
> --- /dev/null
> +++ b/include/uapi/linux/xrt/xclbin.h
> @@ -0,0 +1,408 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +/*
> + * Xilinx FPGA compiled binary container format
> + *
> + * Copyright (C) 2015-2021, Xilinx Inc
> + */
> +
> +#ifndef _XCLBIN_H_
> +#define _XCLBIN_H_
> +
> +#ifdef _WIN32

WIN32 ?

Only 1 other header has this ifdef

> + #include <cstdint>
> + #include <algorithm>
c++ is being assumed for windows
> + #include "windows/uuid.h"
thank you for not including windows.h ;)
> +#else
> + #if defined(__KERNEL__)
> + #include <linux/types.h>
> + #include <linux/uuid.h>
> + #include <linux/version.h>
> + #elif defined(__cplusplus)
> + #include <cstdlib>
> + #include <cstdint>
> + #include <algorithm>
> + #include <uuid/uuid.h>
> + #else
> + #include <stdlib.h>
> + #include <stdint.h>
> + #include <uuid/uuid.h>
> + #endif
> +#endif
> +

Review these includes, some could be convenience includes.

ex/ linux/version.h with no obvious use of version macros.

struct axlf_header {
+ uint64_t m_length; /* Total size of the xclbin file */
.. snip ..
+ union {
+ char m_next_axlf[16]; /* Name of next xclbin file */
+ /* in the daisy chain */
+ uuid_t uuid; /* uuid of this xclbin*/
+ };

As mentioned in an earlier patch, if uuid_t is larger than 16 bytes, axlf_header breaks.
while it is convenient to have this type here, it would be better this access was handled in another way.
Maybe a host specific function.

I also do not see a pragma pack, usually this is set of 1 so the compiler does not shuffle elements, increase size etc.

> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +/**
> + * DOC: Container format for Xilinx FPGA images
> + * The container stores bitstreams, metadata and firmware images.
> + * xclbin/xsabin is ELF-like binary container format. It is structured
is an ELF-like file format.  It is a structured
> + * series of sections. There is a file header followed by several section
> + * headers which is followed by sections. A section header points to an
> + * actual section. There is an optional signature at the end. The
> + * following figure illustrates a typical xclbin:
> + *
> + * +---------------------+
> + * | |
> + * | HEADER |
> + * +---------------------+
> + * | SECTION HEADER |
> + * | |
> + * +---------------------+
> + * | ... |
> + * | |
> + * +---------------------+
> + * | SECTION HEADER |
> + * | |
> + * +---------------------+
> + * | SECTION |
> + * | |
> + * +---------------------+
> + * | ... |
> + * | |
> + * +---------------------+
> + * | SECTION |
> + * | |
> + * +---------------------+
> + * | SIGNATURE |
> + * | (OPTIONAL) |
> + * +---------------------+

This ascii art is a mixture of tabs and spaces, for someone with tab = 2 spaces, this will look messed up.

convert the tabs to spaces

> + */
> +
> +enum XCLBIN_MODE {
> + XCLBIN_FLAT,

generally

all enums used in a file format should be initialized.

This likely should be

XCLBIN_FLAT = 0,

> + XCLBIN_PR,
> + XCLBIN_TANDEM_STAGE2,
> + XCLBIN_TANDEM_STAGE2_WITH_PR,
> + XCLBIN_HW_EMU,
> + XCLBIN_SW_EMU,
> + XCLBIN_MODE_MAX
> +};
> +
> +enum axlf_section_kind {
> + BITSTREAM = 0,
> + CLEARING_BITSTREAM,
> + EMBEDDED_METADATA,
> + FIRMWARE,
> + DEBUG_DATA,
> + SCHED_FIRMWARE,
> + MEM_TOPOLOGY,
> + CONNECTIVITY,
> + IP_LAYOUT,
> + DEBUG_IP_LAYOUT,
> + DESIGN_CHECK_POINT,
> + CLOCK_FREQ_TOPOLOGY,
> + MCS,
> + BMC,
> + BUILD_METADATA,
> + KEYVALUE_METADATA,
> + USER_METADATA,
> + DNA_CERTIFICATE,
> + PDI,
> + BITSTREAM_PARTIAL_PDI,
> + PARTITION_METADATA,
> + EMULATION_DATA,
> + SYSTEM_METADATA,
> + SOFT_KERNEL,
> + ASK_FLASH,
> + AIE_METADATA,
> + ASK_GROUP_TOPOLOGY,
> + ASK_GROUP_CONNECTIVITY
> +};
> +
> +enum MEM_TYPE {
> + MEM_DDR3,
> + MEM_DDR4,
> + MEM_DRAM,
> + MEM_STREAMING,
> + MEM_PREALLOCATED_GLOB,
> + MEM_ARE,
> + MEM_HBM,
> + MEM_BRAM,
> + MEM_URAM,
> + MEM_STREAMING_CONNECTION
> +};
> +
> +enum IP_TYPE {
> + IP_MB = 0,
> + IP_KERNEL,
> + IP_DNASC,
> + IP_DDR4_CONTROLLER,
> + IP_MEM_DDR4,
> + IP_MEM_HBM
> +};
> +
> +struct axlf_section_header {
> + uint32_t m_sectionKind; /* Section type */
> + char m_sectionName[16]; /* Examples: "stage2", "clear1", */
> + /* "clear2", "ocl1", "ocl2, */
> + /* "ublaze", "sched" */
> + uint64_t m_sectionOffset; /* File offset of section data */
> + uint64_t m_sectionSize; /* Size of section data */
> +};
> +
> +struct axlf_header {
> + uint64_t m_length; /* Total size of the xclbin file */
> + uint64_t m_timeStamp; /* Number of seconds since epoch */
> + /* when xclbin was created */
> + uint64_t m_featureRomTimeStamp; /* TimeSinceEpoch of the featureRom */
> + uint16_t m_versionPatch; /* Patch Version */
> + uint8_t m_versionMajor; /* Major Version - Version: 2.1.0*/
i did not see the version checked earlier, which one is expected ?
> + uint8_t m_versionMinor; /* Minor Version */
> + uint32_t m_mode; /* XCLBIN_MODE */
> + union {
> + struct {
> + uint64_t m_platformId; /* 64 bit platform ID: */
> + /* vendor-device-subvendor-subdev */
> + uint64_t m_featureId; /* 64 bit feature id */
> + } rom;
> + unsigned char rom_uuid[16]; /* feature ROM UUID for which */
> + /* this xclbin was generated */
> + };
> + unsigned char m_platformVBNV[64]; /* e.g. */
what is VBNV?
> + /* xilinx:xil-accel-rd-ku115:4ddr-xpr:3.4: null terminated */
> + union {
> + char m_next_axlf[16]; /* Name of next xclbin file */
> + /* in the daisy chain */
> + uuid_t uuid; /* uuid of this xclbin*/
> + };
> + char m_debug_bin[16]; /* Name of binary with debug */
> + /* information */
> + uint32_t m_numSections; /* Number of section headers */
> +};
> +
> +struct axlf {
> + char m_magic[8]; /* Should be "xclbin2\0" */
> + int32_t m_signature_length; /* Length of the signature. */
> + /* -1 indicates no signature */
> + unsigned char reserved[28]; /* Note: Initialized to 0xFFs */
> +
> + unsigned char m_keyBlock[256]; /* Signature for validation */
> + /* of binary */
> + uint64_t m_uniqueId; /* axlf's uniqueId, use it to */
> + /* skip redownload etc */
> + struct axlf_header m_header; /* Inline header */
> + struct axlf_section_header m_sections[1]; /* One or more section */
> + /* headers follow */
> +};
> +
> +/* bitstream information */
> +struct xlnx_bitstream {
> + uint8_t m_freq[8];
> + char bits[1];
> +};
> +
> +/**** MEMORY TOPOLOGY SECTION ****/
> +struct mem_data {
> + uint8_t m_type; /* enum corresponding to mem_type. */
> + uint8_t m_used; /* if 0 this bank is not present */
> + union {
> + uint64_t m_size; /* if mem_type DDR, then size in KB; */
> + uint64_t route_id; /* if streaming then "route_id" */
> + };
> + union {
> + uint64_t m_base_address;/* if DDR then the base address; */
> + uint64_t flow_id; /* if streaming then "flow id" */
> + };
> + unsigned char m_tag[16]; /* DDR: BANK0,1,2,3, has to be null */
> + /* terminated; if streaming then stream0, 1 etc */
> +};
> +
> +struct mem_topology {
> + int32_t m_count; /* Number of mem_data */
> + struct mem_data m_mem_data[1]; /* Should be sorted on mem_type */
> +};
> +
> +/**** CONNECTIVITY SECTION ****/
> +/* Connectivity of each argument of Kernel. It will be in terms of argument

This section does not make sense.

Likely you mean some algorithm kernel, rather than the linux kernel.

> + * index associated. For associating kernel instances with arguments and
> + * banks, start at the connectivity section. Using the m_ip_layout_index
> + * access the ip_data.m_name. Now we can associate this kernel instance
> + * with its original kernel name and get the connectivity as well. This
> + * enables us to form related groups of kernel instances.
> + */
> +
> +struct connection {
> + int32_t arg_index; /* From 0 to n, may not be contiguous as scalars */
> + /* skipped */
> + int32_t m_ip_layout_index; /* index into the ip_layout section. */
> + /* ip_layout.m_ip_data[index].m_type == IP_KERNEL */
> + int32_t mem_data_index; /* index of the m_mem_data . Flag error is */
> + /* m_used false. */
> +};
> +
> +struct connectivity {
> + int32_t m_count;
> + struct connection m_connection[1];
> +};
> +
> +/**** IP_LAYOUT SECTION ****/
> +
> +/* IP Kernel */
> +#define IP_INT_ENABLE_MASK 0x0001
> +#define IP_INTERRUPT_ID_MASK 0x00FE
> +#define IP_INTERRUPT_ID_SHIFT 0x1
> +
> +enum IP_CONTROL {
> + AP_CTRL_HS = 0,
> + AP_CTRL_CHAIN = 1,
> + AP_CTRL_NONE = 2,
> + AP_CTRL_ME = 3,
> + ACCEL_ADAPTER = 4
assigning beyond the first is not necessary unless there are dups or gaps
> +};
> +
> +#define IP_CONTROL_MASK 0xFF00
> +#define IP_CONTROL_SHIFT 0x8
> +
> +/* IPs on AXI lite - their types, names, and base addresses.*/
> +struct ip_data {
> + uint32_t m_type; /* map to IP_TYPE enum */
> + union {
> + uint32_t properties; /* Default: 32-bits to indicate ip */
> + /* specific property. */
> + /* m_type: IP_KERNEL
> + * m_int_enable : Bit - 0x0000_0001;
> + * m_interrupt_id : Bits - 0x0000_00FE;
> + * m_ip_control : Bits = 0x0000_FF00;
> + */
> + struct { /* m_type: IP_MEM_* */
> + uint16_t m_index;
> + uint8_t m_pc_index;
> + uint8_t unused;
> + } indices;
> + };
> + uint64_t m_base_address;
> + uint8_t m_name[64]; /* eg Kernel name corresponding to KERNEL */
> + /* instance, can embed CU name in future. */
> +};
> +
> +struct ip_layout {
> + int32_t m_count;
> + struct ip_data m_ip_data[1]; /* All the ip_data needs to be sorted */
> + /* by m_base_address. */

general

doing the bla[1] for c++ ?

Tom

> +};
> +
> +/*** Debug IP section layout ****/
> +enum DEBUG_IP_TYPE {
> + UNDEFINED = 0,
> + LAPC,
> + ILA,
> + AXI_MM_MONITOR,
> + AXI_TRACE_FUNNEL,
> + AXI_MONITOR_FIFO_LITE,
> + AXI_MONITOR_FIFO_FULL,
> + ACCEL_MONITOR,
> + AXI_STREAM_MONITOR,
> + AXI_STREAM_PROTOCOL_CHECKER,
> + TRACE_S2MM,
> + AXI_DMA,
> + TRACE_S2MM_FULL
> +};
> +
> +struct debug_ip_data {
> + uint8_t m_type; /* type of enum DEBUG_IP_TYPE */
> + uint8_t m_index_lowbyte;
> + uint8_t m_properties;
> + uint8_t m_major;
> + uint8_t m_minor;
> + uint8_t m_index_highbyte;
> + uint8_t m_reserved[2];
> + uint64_t m_base_address;
> + char m_name[128];
> +};
> +
> +struct debug_ip_layout {
> + uint16_t m_count;
> + struct debug_ip_data m_debug_ip_data[1];
> +};
> +
> +/* Supported clock frequency types */
> +enum CLOCK_TYPE {
> + CT_UNUSED = 0, /* Initialized value */
> + CT_DATA = 1, /* Data clock */
> + CT_KERNEL = 2, /* Kernel clock */
> + CT_SYSTEM = 3 /* System Clock */
> +};
> +
> +/* Clock Frequency Entry */
> +struct clock_freq {
> + uint16_t m_freq_Mhz; /* Frequency in MHz */
> + uint8_t m_type; /* Clock type (enum CLOCK_TYPE) */
> + uint8_t m_unused[5]; /* Not used - padding */
> + char m_name[128]; /* Clock Name */
> +};
> +
> +/* Clock frequency section */
> +struct clock_freq_topology {
> + int16_t m_count; /* Number of entries */
> + struct clock_freq m_clock_freq[1]; /* Clock array */
> +};
> +
> +/* Supported MCS file types */
> +enum MCS_TYPE {
> + MCS_UNKNOWN = 0, /* Initialized value */
> + MCS_PRIMARY = 1, /* The primary mcs file data */
> + MCS_SECONDARY = 2, /* The secondary mcs file data */
> +};
> +
> +/* One chunk of MCS data */
> +struct mcs_chunk {
> + uint8_t m_type; /* MCS data type */
> + uint8_t m_unused[7]; /* padding */
> + uint64_t m_offset; /* data offset from the start of */
> + /* the section */
> + uint64_t m_size; /* data size */
> +};
> +
> +/* MCS data section */
> +struct mcs {
> + int8_t m_count; /* Number of chunks */
> + int8_t m_unused[7]; /* padding */
> + struct mcs_chunk m_chunk[1]; /* MCS chunks followed by data */
> +};
> +
> +/* bmc data section */
> +struct bmc {
> + uint64_t m_offset; /* data offset from the start of */
> + /* the section */
> + uint64_t m_size; /* data size (bytes) */
> + char m_image_name[64]; /* Name of the image */
> + /* (e.g., MSP432P401R) */
> + char m_device_name[64]; /* Device ID (e.g., VCU1525) */
> + char m_version[64];
> + char m_md5value[33]; /* MD5 Expected Value */
> + /* (e.g., 56027182079c0bd621761b7dab5a27ca)*/
> + char m_padding[7]; /* Padding */
> +};
> +
> +/* soft kernel data section, used by classic driver */
> +struct soft_kernel {
> + /** Prefix Syntax:
> + * mpo - member, pointer, offset
> + * This variable represents a zero terminated string
> + * that is offseted from the beginning of the section.
> + * The pointer to access the string is initialized as follows:
> + * char * pCharString = (address_of_section) + (mpo value)
> + */
> + uint32_t mpo_name; /* Name of the soft kernel */
> + uint32_t m_image_offset; /* Image offset */
> + uint32_t m_image_size; /* Image size */
> + uint32_t mpo_version; /* Version */
> + uint32_t mpo_md5_value; /* MD5 checksum */
> + uint32_t mpo_symbol_name; /* Symbol name */
> + uint32_t m_num_instances; /* Number of instances */
> + uint8_t padding[36]; /* Reserved for future use */
> + uint8_t reservedExt[16]; /* Reserved for future extended data */
> +};
> +
> +enum CHECKSUM_TYPE {
> + CST_UNKNOWN = 0,
> + CST_SDBM = 1,
> + CST_LAST
> +};
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif