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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation.
* Copyright 2013-2014 6WIND S.A.
*/
#include <string.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/queue.h>
#include <sys/mman.h>
#include <rte_errno.h>
#include <rte_interrupts.h>
#include <rte_log.h>
#include <rte_bus.h>
#include <rte_per_lcore.h>
#include <rte_memory.h>
#include <rte_eal.h>
#include <rte_string_fns.h>
#include <rte_common.h>
#include "rte_pci.h"
static inline const char *
get_u8_pciaddr_field(const char *in, void *_u8, char dlm)
{
unsigned long val;
uint8_t *u8 = _u8;
char *end;
/* empty string is an error though strtoul() returns 0 */
if (*in == '\0')
return NULL;
errno = 0;
val = strtoul(in, &end, 16);
if (errno != 0 || end[0] != dlm || val > UINT8_MAX) {
errno = errno ? errno : EINVAL;
return NULL;
}
*u8 = (uint8_t)val;
return end + 1;
}
static int
pci_bdf_parse(const char *input, struct rte_pci_addr *dev_addr)
{
const char *in = input;
dev_addr->domain = 0;
in = get_u8_pciaddr_field(in, &dev_addr->bus, ':');
if (in == NULL)
return -EINVAL;
in = get_u8_pciaddr_field(in, &dev_addr->devid, '.');
if (in == NULL)
return -EINVAL;
in = get_u8_pciaddr_field(in, &dev_addr->function, '\0');
if (in == NULL)
return -EINVAL;
return 0;
}
static int
pci_dbdf_parse(const char *input, struct rte_pci_addr *dev_addr)
{
const char *in = input;
unsigned long val;
char *end;
errno = 0;
val = strtoul(in, &end, 16);
if (errno != 0 || end[0] != ':' || val > UINT16_MAX)
return -EINVAL;
dev_addr->domain = (uint16_t)val;
in = end + 1;
in = get_u8_pciaddr_field(in, &dev_addr->bus, ':');
if (in == NULL)
return -EINVAL;
in = get_u8_pciaddr_field(in, &dev_addr->devid, '.');
if (in == NULL)
return -EINVAL;
in = get_u8_pciaddr_field(in, &dev_addr->function, '\0');
if (in == NULL)
return -EINVAL;
return 0;
}
int
eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
{
return pci_bdf_parse(input, dev_addr);
}
int
eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
{
return pci_dbdf_parse(input, dev_addr);
}
void
rte_pci_device_name(const struct rte_pci_addr *addr,
char *output, size_t size)
{
RTE_VERIFY(size >= PCI_PRI_STR_SIZE);
RTE_VERIFY(snprintf(output, size, PCI_PRI_FMT,
addr->domain, addr->bus,
addr->devid, addr->function) >= 0);
}
int
rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
const struct rte_pci_addr *addr2)
{
return rte_pci_addr_cmp(addr, addr2);
}
int
rte_pci_addr_cmp(const struct rte_pci_addr *addr,
const struct rte_pci_addr *addr2)
{
uint64_t dev_addr, dev_addr2;
if ((addr == NULL) || (addr2 == NULL))
return -1;
dev_addr = ((uint64_t)addr->domain << 24) |
(addr->bus << 16) | (addr->devid << 8) | addr->function;
dev_addr2 = ((uint64_t)addr2->domain << 24) |
(addr2->bus << 16) | (addr2->devid << 8) | addr2->function;
if (dev_addr > dev_addr2)
return 1;
else if (dev_addr < dev_addr2)
return -1;
else
return 0;
}
int
rte_pci_addr_parse(const char *str, struct rte_pci_addr *addr)
{
if (pci_bdf_parse(str, addr) == 0 ||
pci_dbdf_parse(str, addr) == 0)
return 0;
return -1;
}
/* map a particular resource from a file */
void *
pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
int additional_flags)
{
void *mapaddr;
/* Map the PCI memory resource of device */
mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
MAP_SHARED | additional_flags, fd, offset);
if (mapaddr == MAP_FAILED) {
RTE_LOG(ERR, EAL,
"%s(): cannot mmap(%d, %p, 0x%zx, 0x%llx): %s (%p)\n",
__func__, fd, requested_addr, size,
(unsigned long long)offset,
strerror(errno), mapaddr);
} else
RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
return mapaddr;
}
/* unmap a particular resource */
void
pci_unmap_resource(void *requested_addr, size_t size)
{
if (requested_addr == NULL)
return;
/* Unmap the PCI memory resource of device */
if (munmap(requested_addr, size)) {
RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, %#zx): %s\n",
__func__, requested_addr, size,
strerror(errno));
} else
RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
requested_addr);
}
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