[dpdk-dev] [PATCH v5 3/3] pmdinfogen: remove C implementation

[Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>]

Delete the files no longer used in build process.  Keep Neil Horman
maintainer of the entire "Driver information" section, only adjust
paths.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
---
 MAINTAINERS                        |   2 +-
 buildtools/pmdinfogen/meson.build  |  14 -
 buildtools/pmdinfogen/pmdinfogen.c | 456 -----------------------------
 buildtools/pmdinfogen/pmdinfogen.h | 119 --------
 4 files changed, 1 insertion(+), 590 deletions(-)
 delete mode 100644 buildtools/pmdinfogen/meson.build
 delete mode 100644 buildtools/pmdinfogen/pmdinfogen.c
 delete mode 100644 buildtools/pmdinfogen/pmdinfogen.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 652712ccb..38e994388 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -135,7 +135,7 @@ F: lib/*/*.map
 
 Driver information
 M: Neil Horman <nhorman@tuxdriver.com>
-F: buildtools/pmdinfogen/
+F: buildtools/pmdinfogen.py
 F: usertools/dpdk-pmdinfo.py
 F: doc/guides/tools/pmdinfo.rst
 
diff --git a/buildtools/pmdinfogen/meson.build b/buildtools/pmdinfogen/meson.build
deleted file mode 100644
index 670528fac..000000000
--- a/buildtools/pmdinfogen/meson.build
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
-
-if is_windows
-	subdir_done()
-endif
-
-pmdinfogen_inc = [global_inc]
-pmdinfogen_inc += include_directories('../../lib/librte_eal/include')
-pmdinfogen_inc += include_directories('../../lib/librte_pci')
-pmdinfogen = executable('pmdinfogen',
-	'pmdinfogen.c',
-	include_directories: pmdinfogen_inc,
-	native: true)
diff --git a/buildtools/pmdinfogen/pmdinfogen.c b/buildtools/pmdinfogen/pmdinfogen.c
deleted file mode 100644
index a68d1ea99..000000000
--- a/buildtools/pmdinfogen/pmdinfogen.c
+++ /dev/null
@@ -1,456 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0
- * Postprocess pmd object files to export hw support
- *
- * Copyright 2016 Neil Horman <nhorman@tuxdriver.com>
- * Based in part on modpost.c from the linux kernel
- */
-
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include <limits.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <libgen.h>
-
-#include <rte_common.h>
-#include "pmdinfogen.h"
-
-#ifdef RTE_ARCH_64
-#define ADDR_SIZE 64
-#else
-#define ADDR_SIZE 32
-#endif
-
-static int use_stdin, use_stdout;
-
-static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
-{
-	if (sym)
-		return elf->strtab + sym->st_name;
-	else
-		return "(unknown)";
-}
-
-static void *grab_file(const char *filename, unsigned long *size)
-{
-	struct stat st;
-	void *map = MAP_FAILED;
-	int fd = -1;
-
-	if (!use_stdin) {
-		fd = open(filename, O_RDONLY);
-		if (fd < 0)
-			return NULL;
-	} else {
-		/* from stdin, use a temporary file to mmap */
-		FILE *infile;
-		char buffer[1024];
-		int n;
-
-		infile = tmpfile();
-		if (infile == NULL) {
-			perror("tmpfile");
-			return NULL;
-		}
-		fd = dup(fileno(infile));
-		fclose(infile);
-		if (fd < 0)
-			return NULL;
-
-		n = read(STDIN_FILENO, buffer, sizeof(buffer));
-		while (n > 0) {
-			if (write(fd, buffer, n) != n)
-				goto failed;
-			n = read(STDIN_FILENO, buffer, sizeof(buffer));
-		}
-	}
-
-	if (fstat(fd, &st))
-		goto failed;
-
-	*size = st.st_size;
-	map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
-
-failed:
-	close(fd);
-	if (map == MAP_FAILED)
-		return NULL;
-	return map;
-}
-
-/**
-  * Return a copy of the next line in a mmap'ed file.
-  * spaces in the beginning of the line is trimmed away.
-  * Return a pointer to a static buffer.
-  **/
-static void release_file(void *file, unsigned long size)
-{
-	munmap(file, size);
-}
-
-
-static void *get_sym_value(struct elf_info *info, const Elf_Sym *sym)
-{
-	return RTE_PTR_ADD(info->hdr,
-		info->sechdrs[sym->st_shndx].sh_offset + sym->st_value);
-}
-
-static Elf_Sym *find_sym_in_symtab(struct elf_info *info,
-				   const char *name, Elf_Sym *last)
-{
-	Elf_Sym *idx;
-	if (last)
-		idx = last+1;
-	else
-		idx = info->symtab_start;
-
-	for (; idx < info->symtab_stop; idx++) {
-		const char *n = sym_name(info, idx);
-		if (!strncmp(n, name, strlen(name)))
-			return idx;
-	}
-	return NULL;
-}
-
-static int parse_elf(struct elf_info *info, const char *filename)
-{
-	unsigned int i;
-	Elf_Ehdr *hdr;
-	Elf_Shdr *sechdrs;
-	Elf_Sym  *sym;
-	int endian;
-	unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U;
-
-	hdr = grab_file(filename, &info->size);
-	if (!hdr) {
-		perror(filename);
-		exit(1);
-	}
-	info->hdr = hdr;
-	if (info->size < sizeof(*hdr)) {
-		/* file too small, assume this is an empty .o file */
-		return 0;
-	}
-	/* Is this a valid ELF file? */
-	if ((hdr->e_ident[EI_MAG0] != ELFMAG0) ||
-	    (hdr->e_ident[EI_MAG1] != ELFMAG1) ||
-	    (hdr->e_ident[EI_MAG2] != ELFMAG2) ||
-	    (hdr->e_ident[EI_MAG3] != ELFMAG3)) {
-		/* Not an ELF file - silently ignore it */
-		return 0;
-	}
-
-	if (!hdr->e_ident[EI_DATA]) {
-		/* Unknown endian */
-		return 0;
-	}
-
-	endian = hdr->e_ident[EI_DATA];
-
-	/* Fix endianness in ELF header */
-	hdr->e_type      = TO_NATIVE(endian, 16, hdr->e_type);
-	hdr->e_machine   = TO_NATIVE(endian, 16, hdr->e_machine);
-	hdr->e_version   = TO_NATIVE(endian, 32, hdr->e_version);
-	hdr->e_entry     = TO_NATIVE(endian, ADDR_SIZE, hdr->e_entry);
-	hdr->e_phoff     = TO_NATIVE(endian, ADDR_SIZE, hdr->e_phoff);
-	hdr->e_shoff     = TO_NATIVE(endian, ADDR_SIZE, hdr->e_shoff);
-	hdr->e_flags     = TO_NATIVE(endian, 32, hdr->e_flags);
-	hdr->e_ehsize    = TO_NATIVE(endian, 16, hdr->e_ehsize);
-	hdr->e_phentsize = TO_NATIVE(endian, 16, hdr->e_phentsize);
-	hdr->e_phnum     = TO_NATIVE(endian, 16, hdr->e_phnum);
-	hdr->e_shentsize = TO_NATIVE(endian, 16, hdr->e_shentsize);
-	hdr->e_shnum     = TO_NATIVE(endian, 16, hdr->e_shnum);
-	hdr->e_shstrndx  = TO_NATIVE(endian, 16, hdr->e_shstrndx);
-
-	sechdrs = RTE_PTR_ADD(hdr, hdr->e_shoff);
-	info->sechdrs = sechdrs;
-
-	/* Check if file offset is correct */
-	if (hdr->e_shoff > info->size) {
-		fprintf(stderr, "section header offset=%lu in file '%s' "
-		      "is bigger than filesize=%lu\n",
-		      (unsigned long)hdr->e_shoff,
-		      filename, info->size);
-		return 0;
-	}
-
-	if (hdr->e_shnum == SHN_UNDEF) {
-		/*
-		 * There are more than 64k sections,
-		 * read count from .sh_size.
-		 */
-		info->num_sections =
-			TO_NATIVE(endian, ADDR_SIZE, sechdrs[0].sh_size);
-	} else {
-		info->num_sections = hdr->e_shnum;
-	}
-	if (hdr->e_shstrndx == SHN_XINDEX)
-		info->secindex_strings =
-			TO_NATIVE(endian, 32, sechdrs[0].sh_link);
-	else
-		info->secindex_strings = hdr->e_shstrndx;
-
-	/* Fix endianness in section headers */
-	for (i = 0; i < info->num_sections; i++) {
-		sechdrs[i].sh_name      =
-			TO_NATIVE(endian, 32, sechdrs[i].sh_name);
-		sechdrs[i].sh_type      =
-			TO_NATIVE(endian, 32, sechdrs[i].sh_type);
-		sechdrs[i].sh_flags     =
-			TO_NATIVE(endian, 32, sechdrs[i].sh_flags);
-		sechdrs[i].sh_addr      =
-			TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_addr);
-		sechdrs[i].sh_offset    =
-			TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_offset);
-		sechdrs[i].sh_size      =
-			TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_size);
-		sechdrs[i].sh_link      =
-			TO_NATIVE(endian, 32, sechdrs[i].sh_link);
-		sechdrs[i].sh_info      =
-			TO_NATIVE(endian, 32, sechdrs[i].sh_info);
-		sechdrs[i].sh_addralign =
-			TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_addralign);
-		sechdrs[i].sh_entsize   =
-			TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_entsize);
-	}
-	/* Find symbol table. */
-	for (i = 1; i < info->num_sections; i++) {
-		int nobits = sechdrs[i].sh_type == SHT_NOBITS;
-
-		if (!nobits && sechdrs[i].sh_offset > info->size) {
-			fprintf(stderr, "%s is truncated. "
-			      "sechdrs[i].sh_offset=%lu > sizeof(*hrd)=%zu\n",
-			      filename, (unsigned long)sechdrs[i].sh_offset,
-			      sizeof(*hdr));
-			return 0;
-		}
-
-		if (sechdrs[i].sh_type == SHT_SYMTAB) {
-			unsigned int sh_link_idx;
-			symtab_idx = i;
-			info->symtab_start = RTE_PTR_ADD(hdr,
-				sechdrs[i].sh_offset);
-			info->symtab_stop  = RTE_PTR_ADD(hdr,
-				sechdrs[i].sh_offset + sechdrs[i].sh_size);
-			sh_link_idx = sechdrs[i].sh_link;
-			info->strtab       = RTE_PTR_ADD(hdr,
-				sechdrs[sh_link_idx].sh_offset);
-		}
-
-		/* 32bit section no. table? ("more than 64k sections") */
-		if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) {
-			symtab_shndx_idx = i;
-			info->symtab_shndx_start = RTE_PTR_ADD(hdr,
-				sechdrs[i].sh_offset);
-			info->symtab_shndx_stop  = RTE_PTR_ADD(hdr,
-				sechdrs[i].sh_offset + sechdrs[i].sh_size);
-		}
-	}
-	if (!info->symtab_start)
-		fprintf(stderr, "%s has no symtab?\n", filename);
-	else {
-		/* Fix endianness in symbols */
-		for (sym = info->symtab_start; sym < info->symtab_stop; sym++) {
-			sym->st_shndx = TO_NATIVE(endian, 16, sym->st_shndx);
-			sym->st_name  = TO_NATIVE(endian, 32, sym->st_name);
-			sym->st_value = TO_NATIVE(endian, ADDR_SIZE, sym->st_value);
-			sym->st_size  = TO_NATIVE(endian, ADDR_SIZE, sym->st_size);
-		}
-	}
-
-	if (symtab_shndx_idx != ~0U) {
-		Elf32_Word *p;
-		if (symtab_idx != sechdrs[symtab_shndx_idx].sh_link)
-			fprintf(stderr,
-			      "%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n",
-			      filename, sechdrs[symtab_shndx_idx].sh_link,
-			      symtab_idx);
-		/* Fix endianness */
-		for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop;
-		     p++)
-			*p = TO_NATIVE(endian, 32, *p);
-	}
-
-	return 1;
-}
-
-static void parse_elf_finish(struct elf_info *info)
-{
-	struct pmd_driver *tmp, *idx = info->drivers;
-	release_file(info->hdr, info->size);
-	while (idx) {
-		tmp = idx->next;
-		free(idx);
-		idx = tmp;
-	}
-}
-
-struct opt_tag {
-	const char *suffix;
-	const char *json_id;
-};
-
-static const struct opt_tag opt_tags[] = {
-	{"_param_string_export", "params"},
-	{"_kmod_dep_export", "kmod"},
-};
-
-static int complete_pmd_entry(struct elf_info *info, struct pmd_driver *drv)
-{
-	const char *tname;
-	int i;
-	char tmpsymname[128];
-	Elf_Sym *tmpsym;
-
-	drv->name = get_sym_value(info, drv->name_sym);
-
-	for (i = 0; i < PMD_OPT_MAX; i++) {
-		memset(tmpsymname, 0, 128);
-		sprintf(tmpsymname, "__%s%s", drv->name, opt_tags[i].suffix);
-		tmpsym = find_sym_in_symtab(info, tmpsymname, NULL);
-		if (!tmpsym)
-			continue;
-		drv->opt_vals[i] = get_sym_value(info, tmpsym);
-	}
-
-	memset(tmpsymname, 0, 128);
-	sprintf(tmpsymname, "__%s_pci_tbl_export", drv->name);
-
-	tmpsym = find_sym_in_symtab(info, tmpsymname, NULL);
-
-
-	/*
-	 * If this returns NULL, then this is a PMD_VDEV, because
-	 * it has no pci table reference
-	 */
-	if (!tmpsym) {
-		drv->pci_tbl = NULL;
-		return 0;
-	}
-
-	tname = get_sym_value(info, tmpsym);
-	tmpsym = find_sym_in_symtab(info, tname, NULL);
-	if (!tmpsym)
-		return -ENOENT;
-
-	drv->pci_tbl = (struct rte_pci_id *)get_sym_value(info, tmpsym);
-	if (!drv->pci_tbl)
-		return -ENOENT;
-
-	return 0;
-}
-
-static int locate_pmd_entries(struct elf_info *info)
-{
-	Elf_Sym *last = NULL;
-	struct pmd_driver *new;
-
-	info->drivers = NULL;
-
-	do {
-		new = calloc(sizeof(struct pmd_driver), 1);
-		if (new == NULL) {
-			fprintf(stderr, "Failed to calloc memory\n");
-			return -1;
-		}
-		new->name_sym = find_sym_in_symtab(info, "this_pmd_name", last);
-		last = new->name_sym;
-		if (!new->name_sym)
-			free(new);
-		else {
-			if (complete_pmd_entry(info, new)) {
-				fprintf(stderr,
-					"Failed to complete pmd entry\n");
-				free(new);
-			} else {
-				new->next = info->drivers;
-				info->drivers = new;
-			}
-		}
-	} while (last);
-
-	return 0;
-}
-
-static void output_pmd_info_string(struct elf_info *info, char *outfile)
-{
-	FILE *ofd;
-	struct pmd_driver *drv;
-	struct rte_pci_id *pci_ids;
-	int idx = 0;
-
-	if (use_stdout)
-		ofd = stdout;
-	else {
-		ofd = fopen(outfile, "w+");
-		if (!ofd) {
-			fprintf(stderr, "Unable to open output file\n");
-			return;
-		}
-	}
-
-	drv = info->drivers;
-
-	while (drv) {
-		fprintf(ofd, "const char %s_pmd_info[] __attribute__((used)) = "
-			"\"PMD_INFO_STRING= {",
-			drv->name);
-		fprintf(ofd, "\\\"name\\\" : \\\"%s\\\", ", drv->name);
-
-		for (idx = 0; idx < PMD_OPT_MAX; idx++) {
-			if (drv->opt_vals[idx])
-				fprintf(ofd, "\\\"%s\\\" : \\\"%s\\\", ",
-					opt_tags[idx].json_id,
-					drv->opt_vals[idx]);
-		}
-
-		pci_ids = drv->pci_tbl;
-		fprintf(ofd, "\\\"pci_ids\\\" : [");
-
-		while (pci_ids && pci_ids->device_id) {
-			fprintf(ofd, "[%d, %d, %d, %d]",
-				pci_ids->vendor_id, pci_ids->device_id,
-				pci_ids->subsystem_vendor_id,
-				pci_ids->subsystem_device_id);
-			pci_ids++;
-			if (pci_ids->device_id)
-				fprintf(ofd, ",");
-			else
-				fprintf(ofd, " ");
-		}
-		fprintf(ofd, "]}\";\n");
-		drv = drv->next;
-	}
-
-	fclose(ofd);
-}
-
-int main(int argc, char **argv)
-{
-	struct elf_info info = {0};
-	int rc = 1;
-
-	if (argc < 3) {
-		fprintf(stderr,
-			"usage: %s <object file> <c output file>\n",
-			basename(argv[0]));
-		exit(127);
-	}
-	use_stdin = !strcmp(argv[1], "-");
-	use_stdout = !strcmp(argv[2], "-");
-	parse_elf(&info, argv[1]);
-
-	if (locate_pmd_entries(&info) < 0)
-		exit(1);
-
-	if (info.drivers) {
-		output_pmd_info_string(&info, argv[2]);
-		rc = 0;
-	} else {
-		fprintf(stderr, "No drivers registered\n");
-	}
-
-	parse_elf_finish(&info);
-	exit(rc);
-}
diff --git a/buildtools/pmdinfogen/pmdinfogen.h b/buildtools/pmdinfogen/pmdinfogen.h
deleted file mode 100644
index 93930e454..000000000
--- a/buildtools/pmdinfogen/pmdinfogen.h
+++ /dev/null
@@ -1,119 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0
- * Postprocess pmd object files to export hw support
- *
- * Copyright 2016 Neil Horman <nhorman@tuxdriver.com>
- * Based in part on modpost.c from the linux kernel
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#ifdef __linux__
-#include <endian.h>
-#else
-#include <sys/endian.h>
-#endif
-#include <fcntl.h>
-#include <unistd.h>
-#include <elf.h>
-#include <rte_pci.h>
-
-/* On BSD-alike OSes elf.h defines these according to host's word size */
-#undef ELF_ST_BIND
-#undef ELF_ST_TYPE
-#undef ELF_R_SYM
-#undef ELF_R_TYPE
-
-/*
- * Define ELF64_* to ELF_*, the latter being defined in both 32 and 64 bit
- * flavors in elf.h.  This makes our code a bit more generic between arches
- * and allows us to support 32 bit code in the future should we ever want to
- */
-#ifdef RTE_ARCH_64
-#define Elf_Ehdr    Elf64_Ehdr
-#define Elf_Shdr    Elf64_Shdr
-#define Elf_Sym     Elf64_Sym
-#define Elf_Addr    Elf64_Addr
-#define Elf_Sword   Elf64_Sxword
-#define Elf_Section Elf64_Half
-#define ELF_ST_BIND ELF64_ST_BIND
-#define ELF_ST_TYPE ELF64_ST_TYPE
-
-#define Elf_Rel     Elf64_Rel
-#define Elf_Rela    Elf64_Rela
-#define ELF_R_SYM   ELF64_R_SYM
-#define ELF_R_TYPE  ELF64_R_TYPE
-#else
-#define Elf_Ehdr    Elf32_Ehdr
-#define Elf_Shdr    Elf32_Shdr
-#define Elf_Sym     Elf32_Sym
-#define Elf_Addr    Elf32_Addr
-#define Elf_Sword   Elf32_Sxword
-#define Elf_Section Elf32_Half
-#define ELF_ST_BIND ELF32_ST_BIND
-#define ELF_ST_TYPE ELF32_ST_TYPE
-
-#define Elf_Rel     Elf32_Rel
-#define Elf_Rela    Elf32_Rela
-#define ELF_R_SYM   ELF32_R_SYM
-#define ELF_R_TYPE  ELF32_R_TYPE
-#endif
-
-
-/*
- * Note, it seems odd that we have both a CONVERT_NATIVE and a TO_NATIVE macro
- * below.  We do this because the values passed to TO_NATIVE may themselves be
- * macros and need both macros here to get expanded.  Specifically its the width
- * variable we are concerned with, because it needs to get expanded prior to
- * string concatenation
- */
-#define CONVERT_NATIVE(fend, width, x) ({ \
-typeof(x) ___x; \
-if ((fend) == ELFDATA2LSB) \
-	___x = le##width##toh(x); \
-else \
-	___x = be##width##toh(x); \
-	___x; \
-})
-
-#define TO_NATIVE(fend, width, x) CONVERT_NATIVE(fend, width, x)
-
-enum opt_params {
-	PMD_PARAM_STRING = 0,
-	PMD_KMOD_DEP,
-	PMD_OPT_MAX
-};
-
-struct pmd_driver {
-	Elf_Sym *name_sym;
-	const char *name;
-	struct rte_pci_id *pci_tbl;
-	struct pmd_driver *next;
-
-	const char *opt_vals[PMD_OPT_MAX];
-};
-
-struct elf_info {
-	unsigned long size;
-	Elf_Ehdr     *hdr;
-	Elf_Shdr     *sechdrs;
-	Elf_Sym      *symtab_start;
-	Elf_Sym      *symtab_stop;
-	char         *strtab;
-
-	/* support for 32bit section numbers */
-
-	unsigned int num_sections; /* max_secindex + 1 */
-	unsigned int secindex_strings;
-	/* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
-	 * take shndx from symtab_shndx_start[N] instead
-	 */
-	Elf32_Word   *symtab_shndx_start;
-	Elf32_Word   *symtab_shndx_stop;
-
-	struct pmd_driver *drivers;
-};
-- 
2.28.0