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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2018-2024 Advanced Micro Devices, Inc.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <inttypes.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <dirent.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdbool.h>
#include <eal_export.h>
#include <rte_common.h>
#include <rte_eal.h>
#include <rte_string_fns.h>
#include "ionic_common.h"
#define IONIC_MDEV_UNK "mdev_unknown"
#define IONIC_MNIC "cpu_mnic"
#define IONIC_MCRYPT "cpu_mcrypt"
#define IONIC_MAX_NAME_LEN 20
#define IONIC_MAX_MNETS 5
#define IONIC_MAX_MCPTS 1
#define IONIC_MAX_DEVICES (IONIC_MAX_MNETS + IONIC_MAX_MCPTS)
#define IONIC_MAX_U16_IDX 0xFFFF
#define IONIC_UIO_MAX_TRIES 32
/*
* Note: the driver can assign any idx number
* in the range [0-IONIC_MAX_MDEV_SCAN)
*/
#define IONIC_MAX_MDEV_SCAN 32
struct ionic_map_tbl {
char dev_name[IONIC_MAX_NAME_LEN];
uint16_t dev_idx;
uint16_t uio_idx;
char mdev_name[IONIC_MAX_NAME_LEN];
};
struct ionic_map_tbl ionic_mdev_map[IONIC_MAX_DEVICES] = {
{ "net_ionic0", 0, IONIC_MAX_U16_IDX, IONIC_MDEV_UNK },
{ "net_ionic1", 1, IONIC_MAX_U16_IDX, IONIC_MDEV_UNK },
{ "net_ionic2", 2, IONIC_MAX_U16_IDX, IONIC_MDEV_UNK },
{ "net_ionic3", 3, IONIC_MAX_U16_IDX, IONIC_MDEV_UNK },
{ "net_ionic4", 4, IONIC_MAX_U16_IDX, IONIC_MDEV_UNK },
{ "crypto_ionic0", 5, IONIC_MAX_U16_IDX, IONIC_MDEV_UNK },
};
struct uio_name {
uint16_t idx;
char name[IONIC_MAX_NAME_LEN];
};
static void
uio_fill_name_cache(struct uio_name *name_cache, const char *pfx)
{
char file[64];
FILE *fp;
char *ret;
int name_idx = 0;
int i;
for (i = 0; i < IONIC_UIO_MAX_TRIES &&
name_idx < IONIC_MAX_DEVICES; i++) {
sprintf(file, "/sys/class/uio/uio%d/name", i);
fp = fopen(file, "r");
if (fp == NULL)
continue;
ret = fgets(name_cache[name_idx].name, IONIC_MAX_NAME_LEN, fp);
if (ret == NULL) {
fclose(fp);
continue;
}
name_cache[name_idx].idx = i;
fclose(fp);
if (strncmp(name_cache[name_idx].name, pfx, strlen(pfx)) == 0)
name_idx++;
}
}
static int
uio_get_idx_for_devname(struct uio_name *name_cache, char *devname)
{
int i;
for (i = 0; i < IONIC_MAX_DEVICES; i++)
if (strncmp(name_cache[i].name, devname, strlen(devname)) == 0)
return name_cache[i].idx;
return -1;
}
RTE_EXPORT_INTERNAL_SYMBOL(ionic_uio_scan_mnet_devices)
void
ionic_uio_scan_mnet_devices(void)
{
struct ionic_map_tbl *map;
char devname[IONIC_MAX_NAME_LEN];
struct uio_name name_cache[IONIC_MAX_DEVICES];
bool done;
int mdev_idx = 0;
int uio_idx;
int i;
static bool scan_done;
if (scan_done)
return;
scan_done = true;
uio_fill_name_cache(name_cache, IONIC_MNIC);
for (i = 0; i < IONIC_MAX_MNETS; i++) {
done = false;
while (!done) {
if (mdev_idx > IONIC_MAX_MDEV_SCAN)
break;
/* Look for a matching mnic */
snprintf(devname, IONIC_MAX_NAME_LEN,
IONIC_MNIC "%d", mdev_idx);
uio_idx = uio_get_idx_for_devname(name_cache, devname);
if (uio_idx >= 0) {
map = &ionic_mdev_map[i];
map->uio_idx = (uint16_t)uio_idx;
strlcpy(map->mdev_name, devname,
IONIC_MAX_NAME_LEN);
done = true;
}
mdev_idx++;
}
}
}
RTE_EXPORT_INTERNAL_SYMBOL(ionic_uio_scan_mcrypt_devices)
void
ionic_uio_scan_mcrypt_devices(void)
{
struct ionic_map_tbl *map;
char devname[IONIC_MAX_NAME_LEN];
struct uio_name name_cache[IONIC_MAX_DEVICES];
bool done;
int mdev_idx = 0;
int uio_idx;
int i;
static bool scan_done;
if (scan_done)
return;
scan_done = true;
uio_fill_name_cache(name_cache, IONIC_MCRYPT);
for (i = IONIC_MAX_MNETS; i < IONIC_MAX_DEVICES; i++) {
done = false;
while (!done) {
if (mdev_idx > IONIC_MAX_MDEV_SCAN)
break;
/* Look for a matching mcrypt */
snprintf(devname, IONIC_MAX_NAME_LEN,
IONIC_MCRYPT "%d", mdev_idx);
uio_idx = uio_get_idx_for_devname(name_cache, devname);
if (uio_idx >= 0) {
map = &ionic_mdev_map[i];
map->uio_idx = (uint16_t)uio_idx;
strlcpy(map->mdev_name, devname,
IONIC_MAX_NAME_LEN);
done = true;
}
mdev_idx++;
}
}
}
static int
uio_get_multi_dev_uionum(const char *name)
{
struct ionic_map_tbl *map;
int i;
for (i = 0; i < IONIC_MAX_DEVICES; i++) {
map = &ionic_mdev_map[i];
if (strncmp(map->dev_name, name, IONIC_MAX_NAME_LEN) == 0) {
if (map->uio_idx == IONIC_MAX_U16_IDX)
return -1;
else
return map->uio_idx;
}
}
return -1;
}
static unsigned long
uio_get_res_size(int uio_idx, int res_idx)
{
unsigned long size;
char file[64];
FILE *fp;
sprintf(file, "/sys/class/uio/uio%d/maps/map%d/size",
uio_idx, res_idx);
fp = fopen(file, "r");
if (fp == NULL)
return 0;
if (fscanf(fp, "0x%lx", &size) != 1)
size = 0;
fclose(fp);
return size;
}
static unsigned long
uio_get_res_phy_addr_offs(int uio_idx, int res_idx)
{
unsigned long offset;
char file[64];
FILE *fp;
sprintf(file, "/sys/class/uio/uio%d/maps/map%d/offset",
uio_idx, res_idx);
fp = fopen(file, "r");
if (fp == NULL)
return 0;
if (fscanf(fp, "0x%lx", &offset) != 1)
offset = 0;
fclose(fp);
return offset;
}
static unsigned long
uio_get_res_phy_addr(int uio_idx, int res_idx)
{
unsigned long addr;
char file[64];
FILE *fp;
sprintf(file, "/sys/class/uio/uio%d/maps/map%d/addr",
uio_idx, res_idx);
fp = fopen(file, "r");
if (fp == NULL)
return 0;
if (fscanf(fp, "0x%lx", &addr) != 1)
addr = 0;
fclose(fp);
return addr;
}
static void *
uio_get_map_res_addr(int uio_idx, int size, int res_idx)
{
char name[64];
int fd;
void *addr;
if (size == 0)
return NULL;
sprintf(name, "/dev/uio%d", uio_idx);
fd = open(name, O_RDWR);
if (fd < 0)
return NULL;
if (size < getpagesize())
size = getpagesize();
addr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, res_idx * getpagesize());
close(fd);
return addr;
}
RTE_EXPORT_INTERNAL_SYMBOL(ionic_uio_get_rsrc)
void
ionic_uio_get_rsrc(const char *name, int idx, struct ionic_dev_bar *bar)
{
int num;
int offs;
num = uio_get_multi_dev_uionum(name);
if (num < 0)
return;
bar->len = uio_get_res_size(num, idx);
offs = uio_get_res_phy_addr_offs(num, idx);
bar->bus_addr = uio_get_res_phy_addr(num, idx);
bar->bus_addr += offs;
bar->vaddr = uio_get_map_res_addr(num, bar->len, idx);
bar->vaddr = ((char *)bar->vaddr) + offs;
}
RTE_EXPORT_INTERNAL_SYMBOL(ionic_uio_rel_rsrc)
void
ionic_uio_rel_rsrc(const char *name, int idx, struct ionic_dev_bar *bar)
{
int num, offs;
num = uio_get_multi_dev_uionum(name);
if (num < 0)
return;
if (bar->vaddr == NULL)
return;
offs = uio_get_res_phy_addr_offs(num, idx);
munmap(((char *)bar->vaddr) - offs, bar->len);
}
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