diff options
Diffstat (limited to 'drivers/crypto/ccp/ccp_pci.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp_pci.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/ccp_pci.c b/drivers/crypto/ccp/ccp_pci.c new file mode 100644 index 00000000..59152ca5 --- /dev/null +++ b/drivers/crypto/ccp/ccp_pci.c @@ -0,0 +1,236 @@ +/* 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; + + +} |