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/* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright 2016 NXP
*
*/
#include <string.h>
#include <dirent.h>
#include <stdbool.h>
#include <rte_log.h>
#include <rte_bus.h>
#include <rte_eal_memconfig.h>
#include <rte_malloc.h>
#include <rte_devargs.h>
#include <rte_memcpy.h>
#include <rte_ethdev_driver.h>
#include <rte_fslmc.h>
#include <fslmc_vfio.h>
#include "fslmc_logs.h"
#include <dpaax_iova_table.h>
int dpaa2_logtype_bus;
#define VFIO_IOMMU_GROUP_PATH "/sys/kernel/iommu_groups"
#define FSLMC_BUS_NAME fslmc
struct rte_fslmc_bus rte_fslmc_bus;
uint8_t dpaa2_virt_mode;
uint32_t
rte_fslmc_get_device_count(enum rte_dpaa2_dev_type device_type)
{
if (device_type > DPAA2_DEVTYPE_MAX)
return 0;
return rte_fslmc_bus.device_count[device_type];
}
RTE_DEFINE_PER_LCORE(struct dpaa2_portal_dqrr, dpaa2_held_bufs);
static void
cleanup_fslmc_device_list(void)
{
struct rte_dpaa2_device *dev;
struct rte_dpaa2_device *t_dev;
TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, t_dev) {
TAILQ_REMOVE(&rte_fslmc_bus.device_list, dev, next);
free(dev);
dev = NULL;
}
}
static int
compare_dpaa2_devname(struct rte_dpaa2_device *dev1,
struct rte_dpaa2_device *dev2)
{
int comp;
if (dev1->dev_type > dev2->dev_type) {
comp = 1;
} else if (dev1->dev_type < dev2->dev_type) {
comp = -1;
} else {
/* Check the ID as types match */
if (dev1->object_id > dev2->object_id)
comp = 1;
else if (dev1->object_id < dev2->object_id)
comp = -1;
else
comp = 0; /* Duplicate device name */
}
return comp;
}
static void
insert_in_device_list(struct rte_dpaa2_device *newdev)
{
int comp, inserted = 0;
struct rte_dpaa2_device *dev = NULL;
struct rte_dpaa2_device *tdev = NULL;
TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, tdev) {
comp = compare_dpaa2_devname(newdev, dev);
if (comp < 0) {
TAILQ_INSERT_BEFORE(dev, newdev, next);
inserted = 1;
break;
}
}
if (!inserted)
TAILQ_INSERT_TAIL(&rte_fslmc_bus.device_list, newdev, next);
}
static struct rte_devargs *
fslmc_devargs_lookup(struct rte_dpaa2_device *dev)
{
struct rte_devargs *devargs;
char dev_name[32];
RTE_EAL_DEVARGS_FOREACH("fslmc", devargs) {
devargs->bus->parse(devargs->name, &dev_name);
if (strcmp(dev_name, dev->device.name) == 0) {
DPAA2_BUS_INFO("**Devargs matched %s", dev_name);
return devargs;
}
}
return NULL;
}
static void
dump_device_list(void)
{
struct rte_dpaa2_device *dev;
uint32_t global_log_level;
int local_log_level;
/* Only if the log level has been set to Debugging, print list */
global_log_level = rte_log_get_global_level();
local_log_level = rte_log_get_level(dpaa2_logtype_bus);
if (global_log_level == RTE_LOG_DEBUG ||
local_log_level == RTE_LOG_DEBUG) {
DPAA2_BUS_LOG(DEBUG, "List of devices scanned on bus:");
TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
DPAA2_BUS_LOG(DEBUG, "\t\t%s", dev->device.name);
}
}
}
static int
scan_one_fslmc_device(char *dev_name)
{
char *dup_dev_name, *t_ptr;
struct rte_dpaa2_device *dev;
if (!dev_name)
return -1;
/* Ignore the Container name itself */
if (!strncmp("dprc", dev_name, 4))
return 0;
/* Creating a temporary copy to perform cut-parse over string */
dup_dev_name = strdup(dev_name);
if (!dup_dev_name) {
DPAA2_BUS_ERR("Unable to allocate device name memory");
return -ENOMEM;
}
/* For all other devices, we allocate rte_dpaa2_device.
* For those devices where there is no driver, probe would release
* the memory associated with the rte_dpaa2_device after necessary
* initialization.
*/
dev = calloc(1, sizeof(struct rte_dpaa2_device));
if (!dev) {
DPAA2_BUS_ERR("Unable to allocate device object");
free(dup_dev_name);
return -ENOMEM;
}
dev->device.bus = &rte_fslmc_bus.bus;
/* Parse the device name and ID */
t_ptr = strtok(dup_dev_name, ".");
if (!t_ptr) {
DPAA2_BUS_ERR("Incorrect device name observed");
goto cleanup;
}
if (!strncmp("dpni", t_ptr, 4))
dev->dev_type = DPAA2_ETH;
else if (!strncmp("dpseci", t_ptr, 6))
dev->dev_type = DPAA2_CRYPTO;
else if (!strncmp("dpcon", t_ptr, 5))
dev->dev_type = DPAA2_CON;
else if (!strncmp("dpbp", t_ptr, 4))
dev->dev_type = DPAA2_BPOOL;
else if (!strncmp("dpio", t_ptr, 4))
dev->dev_type = DPAA2_IO;
else if (!strncmp("dpci", t_ptr, 4))
dev->dev_type = DPAA2_CI;
else if (!strncmp("dpmcp", t_ptr, 5))
dev->dev_type = DPAA2_MPORTAL;
else if (!strncmp("dpdmai", t_ptr, 6))
dev->dev_type = DPAA2_QDMA;
else
dev->dev_type = DPAA2_UNKNOWN;
/* Update the device found into the device_count table */
rte_fslmc_bus.device_count[dev->dev_type]++;
t_ptr = strtok(NULL, ".");
if (!t_ptr) {
DPAA2_BUS_ERR("Incorrect device string observed (%s)", t_ptr);
goto cleanup;
}
sscanf(t_ptr, "%hu", &dev->object_id);
dev->device.name = strdup(dev_name);
if (!dev->device.name) {
DPAA2_BUS_ERR("Unable to clone device name. Out of memory");
goto cleanup;
}
dev->device.devargs = fslmc_devargs_lookup(dev);
/* Add device in the fslmc device list */
insert_in_device_list(dev);
/* Don't need the duplicated device filesystem entry anymore */
if (dup_dev_name)
free(dup_dev_name);
return 0;
cleanup:
if (dup_dev_name)
free(dup_dev_name);
if (dev)
free(dev);
return -1;
}
static int
rte_fslmc_parse(const char *name, void *addr)
{
uint16_t dev_id;
char *t_ptr;
char *sep = strchr(name, ':');
if (strncmp(name, RTE_STR(FSLMC_BUS_NAME),
strlen(RTE_STR(FSLMC_BUS_NAME)))) {
return -EINVAL;
}
if (!sep) {
DPAA2_BUS_ERR("Incorrect device name observed");
return -EINVAL;
}
t_ptr = (char *)(sep + 1);
if (strncmp("dpni", t_ptr, 4) &&
strncmp("dpseci", t_ptr, 6) &&
strncmp("dpcon", t_ptr, 5) &&
strncmp("dpbp", t_ptr, 4) &&
strncmp("dpio", t_ptr, 4) &&
strncmp("dpci", t_ptr, 4) &&
strncmp("dpmcp", t_ptr, 5) &&
strncmp("dpdmai", t_ptr, 6)) {
DPAA2_BUS_ERR("Unknown or unsupported device");
return -EINVAL;
}
t_ptr = strchr(name, '.');
if (!t_ptr) {
DPAA2_BUS_ERR("Incorrect device string observed (%s)", t_ptr);
return -EINVAL;
}
t_ptr = (char *)(t_ptr + 1);
if (sscanf(t_ptr, "%hu", &dev_id) <= 0) {
DPAA2_BUS_ERR("Incorrect device string observed (%s)", t_ptr);
return -EINVAL;
}
if (addr)
strcpy(addr, (char *)(sep + 1));
return 0;
}
static int
rte_fslmc_scan(void)
{
int ret;
int device_count = 0;
char fslmc_dirpath[PATH_MAX];
DIR *dir;
struct dirent *entry;
static int process_once;
int groupid;
if (process_once) {
DPAA2_BUS_DEBUG("Fslmc bus already scanned. Not rescanning");
return 0;
}
process_once = 1;
ret = fslmc_get_container_group(&groupid);
if (ret != 0)
goto scan_fail;
/* Scan devices on the group */
sprintf(fslmc_dirpath, "%s/%d/devices", VFIO_IOMMU_GROUP_PATH,
groupid);
dir = opendir(fslmc_dirpath);
if (!dir) {
DPAA2_BUS_ERR("Unable to open VFIO group directory");
goto scan_fail;
}
while ((entry = readdir(dir)) != NULL) {
if (entry->d_name[0] == '.' || entry->d_type != DT_LNK)
continue;
ret = scan_one_fslmc_device(entry->d_name);
if (ret != 0) {
/* Error in parsing directory - exit gracefully */
goto scan_fail_cleanup;
}
device_count += 1;
}
closedir(dir);
DPAA2_BUS_INFO("FSLMC Bus scan completed");
/* If debugging is enabled, device list is dumped to log output */
dump_device_list();
return 0;
scan_fail_cleanup:
closedir(dir);
/* Remove all devices in the list */
cleanup_fslmc_device_list();
scan_fail:
DPAA2_BUS_DEBUG("FSLMC Bus Not Available. Skipping");
/* Irrespective of failure, scan only return success */
return 0;
}
static int
rte_fslmc_match(struct rte_dpaa2_driver *dpaa2_drv,
struct rte_dpaa2_device *dpaa2_dev)
{
if (dpaa2_drv->drv_type == dpaa2_dev->dev_type)
return 0;
return 1;
}
static int
rte_fslmc_probe(void)
{
int ret = 0;
int probe_all;
struct rte_dpaa2_device *dev;
struct rte_dpaa2_driver *drv;
if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
return 0;
ret = fslmc_vfio_setup_group();
if (ret) {
DPAA2_BUS_ERR("Unable to setup VFIO %d", ret);
return 0;
}
/* Map existing segments as well as, in case of hotpluggable memory,
* install callback handler.
*/
ret = rte_fslmc_vfio_dmamap();
if (ret) {
DPAA2_BUS_ERR("Unable to DMA map existing VAs: (%d)", ret);
/* Not continuing ahead */
DPAA2_BUS_ERR("FSLMC VFIO Mapping failed");
return 0;
}
ret = fslmc_vfio_process_group();
if (ret) {
DPAA2_BUS_ERR("Unable to setup devices %d", ret);
return 0;
}
probe_all = rte_fslmc_bus.bus.conf.scan_mode != RTE_BUS_SCAN_WHITELIST;
/* In case of PA, the FD addresses returned by qbman APIs are physical
* addresses, which need conversion into equivalent VA address for
* rte_mbuf. For that, a table (a serial array, in memory) is used to
* increase translation efficiency.
* This has to be done before probe as some device initialization
* (during) probe allocate memory (dpaa2_sec) which needs to be pinned
* to this table.
*
* Error is ignored as relevant logs are handled within dpaax and
* handling for unavailable dpaax table too is transparent to caller.
*/
dpaax_iova_table_populate();
TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
ret = rte_fslmc_match(drv, dev);
if (ret)
continue;
if (!drv->probe)
continue;
if (rte_dev_is_probed(&dev->device))
continue;
if (dev->device.devargs &&
dev->device.devargs->policy == RTE_DEV_BLACKLISTED) {
DPAA2_BUS_LOG(DEBUG, "%s Blacklisted, skipping",
dev->device.name);
continue;
}
if (probe_all ||
(dev->device.devargs &&
dev->device.devargs->policy ==
RTE_DEV_WHITELISTED)) {
ret = drv->probe(drv, dev);
if (ret) {
DPAA2_BUS_ERR("Unable to probe");
} else {
dev->driver = drv;
dev->device.driver = &drv->driver;
}
}
break;
}
}
if (rte_eal_iova_mode() == RTE_IOVA_VA)
dpaa2_virt_mode = 1;
return 0;
}
static struct rte_device *
rte_fslmc_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
const void *data)
{
const struct rte_dpaa2_device *dstart;
struct rte_dpaa2_device *dev;
if (start != NULL) {
dstart = RTE_DEV_TO_FSLMC_CONST(start);
dev = TAILQ_NEXT(dstart, next);
} else {
dev = TAILQ_FIRST(&rte_fslmc_bus.device_list);
}
while (dev != NULL) {
if (cmp(&dev->device, data) == 0)
return &dev->device;
dev = TAILQ_NEXT(dev, next);
}
return NULL;
}
/*register a fslmc bus based dpaa2 driver */
void
rte_fslmc_driver_register(struct rte_dpaa2_driver *driver)
{
RTE_VERIFY(driver);
TAILQ_INSERT_TAIL(&rte_fslmc_bus.driver_list, driver, next);
/* Update Bus references */
driver->fslmc_bus = &rte_fslmc_bus;
}
/*un-register a fslmc bus based dpaa2 driver */
void
rte_fslmc_driver_unregister(struct rte_dpaa2_driver *driver)
{
struct rte_fslmc_bus *fslmc_bus;
fslmc_bus = driver->fslmc_bus;
/* Cleanup the PA->VA Translation table; From whereever this function
* is called from.
*/
dpaax_iova_table_depopulate();
TAILQ_REMOVE(&fslmc_bus->driver_list, driver, next);
/* Update Bus references */
driver->fslmc_bus = NULL;
}
/*
* All device has iova as va
*/
static inline int
fslmc_all_device_support_iova(void)
{
int ret = 0;
struct rte_dpaa2_device *dev;
struct rte_dpaa2_driver *drv;
TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
ret = rte_fslmc_match(drv, dev);
if (ret)
continue;
/* if the driver is not supporting IOVA */
if (!(drv->drv_flags & RTE_DPAA2_DRV_IOVA_AS_VA))
return 0;
}
}
return 1;
}
/*
* Get iommu class of DPAA2 devices on the bus.
*/
static enum rte_iova_mode
rte_dpaa2_get_iommu_class(void)
{
bool is_vfio_noiommu_enabled = 1;
bool has_iova_va;
if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
return RTE_IOVA_DC;
#ifdef RTE_LIBRTE_DPAA2_USE_PHYS_IOVA
return RTE_IOVA_PA;
#endif
/* check if all devices on the bus support Virtual addressing or not */
has_iova_va = fslmc_all_device_support_iova();
#ifdef VFIO_PRESENT
is_vfio_noiommu_enabled = rte_vfio_noiommu_is_enabled() == true ?
true : false;
#endif
if (has_iova_va && !is_vfio_noiommu_enabled)
return RTE_IOVA_VA;
return RTE_IOVA_PA;
}
struct rte_fslmc_bus rte_fslmc_bus = {
.bus = {
.scan = rte_fslmc_scan,
.probe = rte_fslmc_probe,
.parse = rte_fslmc_parse,
.find_device = rte_fslmc_find_device,
.get_iommu_class = rte_dpaa2_get_iommu_class,
},
.device_list = TAILQ_HEAD_INITIALIZER(rte_fslmc_bus.device_list),
.driver_list = TAILQ_HEAD_INITIALIZER(rte_fslmc_bus.driver_list),
.device_count = {0},
};
RTE_REGISTER_BUS(FSLMC_BUS_NAME, rte_fslmc_bus.bus);
RTE_INIT(fslmc_init_log)
{
/* Bus level logs */
dpaa2_logtype_bus = rte_log_register("bus.fslmc");
if (dpaa2_logtype_bus >= 0)
rte_log_set_level(dpaa2_logtype_bus, RTE_LOG_NOTICE);
}
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