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SubjectRe: [PATCH V3 XRT Alveo 03/18] fpga: xrt: xclbin file helper functions
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Hi Moritz,


On 02/21/2021 10:33 AM, Moritz Fischer wrote:
> On Sun, Feb 21, 2021 at 09:12:37AM -0800, Tom Rix wrote:
>> 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 =
> Why not just:
>
> if (header->m_section_offset + header->m_section_size)
> return -EINVAL;
>
> return 0;
>
> Also please fix the camelCase throughout the entire patchset.
Will fix both.
>>
>>> +
>>> + 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)
> if !(i % 2) ...
Will change it.
>>> + 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
> Tbh, not a big fan of this ...
We will remove WIN32 and keep __cplusplus
>>> +
>> 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 */
> just call them type, unused, offset. Drop the m_*
Will remove all 'm_'

Thanks,
Lizhi
>>> + 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
> I'll take a closer look, these were just random things I bumped into.
>
> - Moritz

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