--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Advanced Micro Devices, Inc. All rights reserved.
+ */
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rte_string_fns.h>
+
+#include "ccp_pci.h"
+
+static const char * const uio_module_names[] = {
+ "igb_uio",
+ "uio_pci_generic",
+};
+
+int
+ccp_check_pci_uio_module(void)
+{
+ FILE *fp;
+ int i;
+ char buf[BUFSIZ];
+
+ fp = fopen(PROC_MODULES, "r");
+ if (fp == NULL)
+ return -1;
+ i = 0;
+ while (uio_module_names[i] != NULL) {
+ while (fgets(buf, sizeof(buf), fp) != NULL) {
+ if (!strncmp(buf, uio_module_names[i],
+ strlen(uio_module_names[i])))
+ return i;
+ }
+ i++;
+ rewind(fp);
+ }
+ printf("Insert igb_uio or uio_pci_generic kernel module(s)");
+ return -1;/* uio not inserted */
+}
+
+/*
+ * split up a pci address into its constituent parts.
+ */
+int
+ccp_parse_pci_addr_format(const char *buf, int bufsize, uint16_t *domain,
+ uint8_t *bus, uint8_t *devid, uint8_t *function)
+{
+ /* first split on ':' */
+ union splitaddr {
+ struct {
+ char *domain;
+ char *bus;
+ char *devid;
+ char *function;
+ };
+ char *str[PCI_FMT_NVAL];
+ /* last element-separator is "." not ":" */
+ } splitaddr;
+
+ char *buf_copy = strndup(buf, bufsize);
+
+ if (buf_copy == NULL)
+ return -1;
+
+ if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
+ != PCI_FMT_NVAL - 1)
+ goto error;
+ /* final split is on '.' between devid and function */
+ splitaddr.function = strchr(splitaddr.devid, '.');
+ if (splitaddr.function == NULL)
+ goto error;
+ *splitaddr.function++ = '\0';
+
+ /* now convert to int values */
+ errno = 0;
+ *domain = (uint8_t)strtoul(splitaddr.domain, NULL, 16);
+ *bus = (uint8_t)strtoul(splitaddr.bus, NULL, 16);
+ *devid = (uint8_t)strtoul(splitaddr.devid, NULL, 16);
+ *function = (uint8_t)strtoul(splitaddr.function, NULL, 10);
+ if (errno != 0)
+ goto error;
+
+ free(buf_copy); /* free the copy made with strdup */
+ return 0;
+error:
+ free(buf_copy);
+ return -1;
+}
+
+int
+ccp_pci_parse_sysfs_value(const char *filename, unsigned long *val)
+{
+ FILE *f;
+ char buf[BUFSIZ];
+ char *end = NULL;
+
+ f = fopen(filename, "r");
+ if (f == NULL)
+ return -1;
+ if (fgets(buf, sizeof(buf), f) == NULL) {
+ fclose(f);
+ return -1;
+ }
+ *val = strtoul(buf, &end, 0);
+ if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
+ fclose(f);
+ return -1;
+ }
+ fclose(f);
+ return 0;
+}
+
+/** IO resource type: */
+#define IORESOURCE_IO 0x00000100
+#define IORESOURCE_MEM 0x00000200
+
+/* parse one line of the "resource" sysfs file (note that the 'line'
+ * string is modified)
+ */
+static int
+ccp_pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr,
+ uint64_t *end_addr, uint64_t *flags)
+{
+ union pci_resource_info {
+ struct {
+ char *phys_addr;
+ char *end_addr;
+ char *flags;
+ };
+ char *ptrs[PCI_RESOURCE_FMT_NVAL];
+ } res_info;
+
+ if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3)
+ return -1;
+ errno = 0;
+ *phys_addr = strtoull(res_info.phys_addr, NULL, 16);
+ *end_addr = strtoull(res_info.end_addr, NULL, 16);
+ *flags = strtoull(res_info.flags, NULL, 16);
+ if (errno != 0)
+ return -1;
+
+ return 0;
+}
+
+/* parse the "resource" sysfs file */
+int
+ccp_pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
+{
+ FILE *fp;
+ char buf[BUFSIZ];
+ int i;
+ uint64_t phys_addr, end_addr, flags;
+
+ fp = fopen(filename, "r");
+ if (fp == NULL)
+ return -1;
+
+ for (i = 0; i < PCI_MAX_RESOURCE; i++) {
+ if (fgets(buf, sizeof(buf), fp) == NULL)
+ goto error;
+ if (ccp_pci_parse_one_sysfs_resource(buf, sizeof(buf),
+ &phys_addr, &end_addr, &flags) < 0)
+ goto error;
+
+ if (flags & IORESOURCE_MEM) {
+ dev->mem_resource[i].phys_addr = phys_addr;
+ dev->mem_resource[i].len = end_addr - phys_addr + 1;
+ /* not mapped for now */
+ dev->mem_resource[i].addr = NULL;
+ }
+ }
+ fclose(fp);
+ return 0;
+
+error:
+ fclose(fp);
+ return -1;
+}
+
+int
+ccp_find_uio_devname(const char *dirname)
+{
+
+ DIR *dir;
+ struct dirent *e;
+ char dirname_uio[PATH_MAX];
+ unsigned int uio_num;
+ int ret = -1;
+
+ /* depending on kernel version, uio can be located in uio/uioX
+ * or uio:uioX
+ */
+ snprintf(dirname_uio, sizeof(dirname_uio), "%s/uio", dirname);
+ dir = opendir(dirname_uio);
+ if (dir == NULL) {
+ /* retry with the parent directory might be different kernel version*/
+ dir = opendir(dirname);
+ if (dir == NULL)
+ return -1;
+ }
+
+ /* take the first file starting with "uio" */
+ while ((e = readdir(dir)) != NULL) {
+ /* format could be uio%d ...*/
+ int shortprefix_len = sizeof("uio") - 1;
+ /* ... or uio:uio%d */
+ int longprefix_len = sizeof("uio:uio") - 1;
+ char *endptr;
+
+ if (strncmp(e->d_name, "uio", 3) != 0)
+ continue;
+
+ /* first try uio%d */
+ errno = 0;
+ uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
+ if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
+ ret = uio_num;
+ break;
+ }
+
+ /* then try uio:uio%d */
+ errno = 0;
+ uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
+ if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
+ ret = uio_num;
+ break;
+ }
+ }
+ closedir(dir);
+ return ret;
+
+
+}
Code Review / deb_dpdk.git / blobdiff