// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2019 Intel Corporation. All rights rsvd. */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <uapi/linux/idxd.h>
#include "registers.h"
#include "idxd.h"
static char *idxd_wq_type_names[] = {
[IDXD_WQT_NONE] = "none",
[IDXD_WQT_KERNEL] = "kernel",
[IDXD_WQT_USER] = "user",
};
/* IDXD engine attributes */
static ssize_t engine_group_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_engine *engine = confdev_to_engine(dev);
if (engine->group)
return sysfs_emit(buf, "%d\n", engine->group->id);
else
return sysfs_emit(buf, "%d\n", -1);
}
static ssize_t engine_group_id_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_engine *engine = confdev_to_engine(dev);
struct idxd_device *idxd = engine->idxd;
long id;
int rc;
struct idxd_group *prevg;
rc = kstrtol(buf, 10, &id);
if (rc < 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (id > idxd->max_groups - 1 || id < -1)
return -EINVAL;
if (id == -1) {
if (engine->group) {
engine->group->num_engines--;
engine->group = NULL;
}
return count;
}
prevg = engine->group;
if (prevg)
prevg->num_engines--;
engine->group = idxd->groups[id];
engine->group->num_engines++;
return count;
}
static struct device_attribute dev_attr_engine_group =
__ATTR(group_id, 0644, engine_group_id_show,
engine_group_id_store);
static struct attribute *idxd_engine_attributes[] = {
&dev_attr_engine_group.attr,
NULL,
};
static const struct attribute_group idxd_engine_attribute_group = {
.attrs = idxd_engine_attributes,
};
static const struct attribute_group *idxd_engine_attribute_groups[] = {
&idxd_engine_attribute_group,
NULL,
};
static void idxd_conf_engine_release(struct device *dev)
{
struct idxd_engine *engine = confdev_to_engine(dev);
kfree(engine);
}
struct device_type idxd_engine_device_type = {
.name = "engine",
.release = idxd_conf_engine_release,
.groups = idxd_engine_attribute_groups,
};
/* Group attributes */
static void idxd_set_free_rdbufs(struct idxd_device *idxd)
{
int i, rdbufs;
for (i = 0, rdbufs = 0; i < idxd->max_groups; i++) {
struct idxd_group *g = idxd->groups[i];
rdbufs += g->rdbufs_reserved;
}
idxd->nr_rdbufs = idxd->max_rdbufs - rdbufs;
}
static ssize_t group_read_buffers_reserved_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%u\n", group->rdbufs_reserved);
}
static ssize_t group_tokens_reserved_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n");
return group_read_buffers_reserved_show(dev, attr, buf);
}
static ssize_t group_read_buffers_reserved_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
struct idxd_device *idxd = group->idxd;
unsigned long val;
int rc;
rc = kstrtoul(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (idxd->data->type == IDXD_TYPE_IAX)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (val > idxd->max_rdbufs)
return -EINVAL;
if (val > idxd->nr_rdbufs + group->rdbufs_reserved)
return -EINVAL;
group->rdbufs_reserved = val;
idxd_set_free_rdbufs(idxd);
return count;
}
static ssize_t group_tokens_reserved_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n");
return group_read_buffers_reserved_store(dev, attr, buf, count);
}
static struct device_attribute dev_attr_group_tokens_reserved =
__ATTR(tokens_reserved, 0644, group_tokens_reserved_show,
group_tokens_reserved_store);
static struct device_attribute dev_attr_group_read_buffers_reserved =
__ATTR(read_buffers_reserved, 0644, group_read_buffers_reserved_show,
group_read_buffers_reserved_store);
static ssize_t group_read_buffers_allowed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%u\n", group->rdbufs_allowed);
}
static ssize_t group_tokens_allowed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n");
return group_read_buffers_allowed_show(dev, attr, buf);
}
static ssize_t group_read_buffers_allowed_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
struct idxd_device *idxd = group->idxd;
unsigned long val;
int rc;
rc = kstrtoul(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (idxd->data->type == IDXD_TYPE_IAX)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (val < 4 * group->num_engines ||
val > group->rdbufs_reserved + idxd->nr_rdbufs)
return -EINVAL;
group->rdbufs_allowed = val;
return count;
}
static ssize_t group_tokens_allowed_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n");
return group_read_buffers_allowed_store(dev, attr, buf, count);
}
static struct device_attribute dev_attr_group_tokens_allowed =
__ATTR(tokens_allowed, 0644, group_tokens_allowed_show,
group_tokens_allowed_store);
static struct device_attribute dev_attr_group_read_buffers_allowed =
__ATTR(read_buffers_allowed, 0644, group_read_buffers_allowed_show,
group_read_buffers_allowed_store);
static ssize_t group_use_read_buffer_limit_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%u\n", group->use_rdbuf_limit);
}
static ssize_t group_use_token_limit_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n");
return group_use_read_buffer_limit_show(dev, attr, buf);
}
static ssize_t group_use_read_buffer_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
struct idxd_device *idxd = group->idxd;
unsigned long val;
int rc;
rc = kstrtoul(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (idxd->data->type == IDXD_TYPE_IAX)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (idxd->rdbuf_limit == 0)
return -EPERM;
group->use_rdbuf_limit = !!val;
return count;
}
static ssize_t group_use_token_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n");
return group_use_read_buffer_limit_store(dev, attr, buf, count);
}
static struct device_attribute dev_attr_group_use_token_limit =
__ATTR(use_token_limit, 0644, group_use_token_limit_show,
group_use_token_limit_store);
static struct device_attribute dev_attr_group_use_read_buffer_limit =
__ATTR(use_read_buffer_limit, 0644, group_use_read_buffer_limit_show,
group_use_read_buffer_limit_store);
static ssize_t group_engines_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
int i, rc = 0;
struct idxd_device *idxd = group->idxd;
for (i = 0; i < idxd->max_engines; i++) {
struct idxd_engine *engine = idxd->engines[i];
if (!engine->group)
continue;
if (engine->group->id == group->id)
rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id);
}
if (!rc)
return 0;
rc--;
rc += sysfs_emit_at(buf, rc, "\n");
return rc;
}
static struct device_attribute dev_attr_group_engines =
__ATTR(engines, 0444, group_engines_show, NULL);
static ssize_t group_work_queues_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
int i, rc = 0;
struct idxd_device *idxd = group->idxd;
for (i = 0; i < idxd->max_wqs; i++) {
struct idxd_wq *wq = idxd->wqs[i];
if (!wq->group)
continue;
if (wq->group->id == group->id)
rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id);
}
if (!rc)
return 0;
rc--;
rc += sysfs_emit_at(buf, rc, "\n");
return rc;
}
static struct device_attribute dev_attr_group_work_queues =
__ATTR(work_queues, 0444, group_work_queues_show, NULL);
static ssize_t group_traffic_class_a_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%d\n", group->tc_a);
}
static ssize_t group_traffic_class_a_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
struct idxd_device *idxd = group->idxd;
long val;
int rc;
rc = kstrtol(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override)
return -EPERM;
if (val < 0 || val > 7)
return -EINVAL;
group->tc_a = val;
return count;
}
static struct device_attribute dev_attr_group_traffic_class_a =
__ATTR(traffic_class_a, 0644, group_traffic_class_a_show,
group_traffic_class_a_store);
static ssize_t group_traffic_class_b_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%d\n", group->tc_b);
}
static ssize_t group_traffic_class_b_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
struct idxd_device *idxd = group->idxd;
long val;
int rc;
rc = kstrtol(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override)
return -EPERM;
if (val < 0 || val > 7)
return -EINVAL;
group->tc_b = val;
return count;
}
static struct device_attribute dev_attr_group_traffic_class_b =
__ATTR(traffic_class_b, 0644, group_traffic_class_b_show,
group_traffic_class_b_store);
static ssize_t group_desc_progress_limit_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%d\n", group->desc_progress_limit);
}
static ssize_t group_desc_progress_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
int val, rc;
rc = kstrtoint(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (val & ~GENMASK(1, 0))
return -EINVAL;
group->desc_progress_limit = val;
return count;
}
static struct device_attribute dev_attr_group_desc_progress_limit =
__ATTR(desc_progress_limit, 0644, group_desc_progress_limit_show,
group_desc_progress_limit_store);
static ssize_t group_batch_progress_limit_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_group *group = confdev_to_group(dev);
return sysfs_emit(buf, "%d\n", group->batch_progress_limit);
}
static ssize_t group_batch_progress_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_group *group = confdev_to_group(dev);
int val, rc;
rc = kstrtoint(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (val & ~GENMASK(1, 0))
return -EINVAL;
group->batch_progress_limit = val;
return count;
}
static struct device_attribute dev_attr_group_batch_progress_limit =
__ATTR(batch_progress_limit, 0644, group_batch_progress_limit_show,
group_batch_progress_limit_store);
static struct attribute *idxd_group_attributes[] = {
&dev_attr_group_work_queues.attr,
&dev_attr_group_engines.attr,
&dev_attr_group_use_token_limit.attr,
&dev_attr_group_use_read_buffer_limit.attr,
&dev_attr_group_tokens_allowed.attr,
&dev_attr_group_read_buffers_allowed.attr,
&dev_attr_group_tokens_reserved.attr,
&dev_attr_group_read_buffers_reserved.attr,
&dev_attr_group_traffic_class_a.attr,
&dev_attr_group_traffic_class_b.attr,
&dev_attr_group_desc_progress_limit.attr,
&dev_attr_group_batch_progress_limit.attr,
NULL,
};
static bool idxd_group_attr_progress_limit_invisible(struct attribute *attr,
struct idxd_device *idxd)
{
return (attr == &dev_attr_group_desc_progress_limit.attr ||
attr == &dev_attr_group_batch_progress_limit.attr) &&
!idxd->hw.group_cap.progress_limit;
}
static umode_t idxd_group_attr_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct idxd_group *group = confdev_to_group(dev);
struct idxd_device *idxd = group->idxd;
if (idxd_group_attr_progress_limit_invisible(attr, idxd))
return 0;
return attr->mode;
}
static const struct attribute_group idxd_group_attribute_group = {
.attrs = idxd_group_attributes,
.is_visible = idxd_group_attr_visible,
};
static const struct attribute_group *idxd_group_attribute_groups[] = {
&idxd_group_attribute_group,
NULL,
};
static void idxd_conf_group_release(struct device *dev)
{
struct idxd_group *group = confdev_to_group(dev);
kfree(group);
}
struct device_type idxd_group_device_type = {
.name = "group",
.release = idxd_conf_group_release,
.groups = idxd_group_attribute_groups,
};
/* IDXD work queue attribs */
static ssize_t wq_clients_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%d\n", wq->client_count);
}
static struct device_attribute dev_attr_wq_clients =
__ATTR(clients, 0444, wq_clients_show, NULL);
static ssize_t wq_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
switch (wq->state) {
case IDXD_WQ_DISABLED:
return sysfs_emit(buf, "disabled\n");
case IDXD_WQ_ENABLED:
return sysfs_emit(buf, "enabled\n");
}
return sysfs_emit(buf, "unknown\n");
}
static struct device_attribute dev_attr_wq_state =
__ATTR(state, 0444, wq_state_show, NULL);
static ssize_t wq_group_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
if (wq->group)
return sysfs_emit(buf, "%u\n", wq->group->id);
else
return sysfs_emit(buf, "-1\n");
}
static ssize_t wq_group_id_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
long id;
int rc;
struct idxd_group *prevg, *group;
rc = kstrtol(buf, 10, &id);
if (rc < 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
if (id > idxd->max_groups - 1 || id < -1)
return -EINVAL;
if (id == -1) {
if (wq->group) {
wq->group->num_wqs--;
wq->group = NULL;
}
return count;
}
group = idxd->groups[id];
prevg = wq->group;
if (prevg)
prevg->num_wqs--;
wq->group = group;
group->num_wqs++;
return count;
}
static struct device_attribute dev_attr_wq_group_id =
__ATTR(group_id, 0644, wq_group_id_show, wq_group_id_store);
static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared");
}
static ssize_t wq_mode_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
if (sysfs_streq(buf, "dedicated")) {
set_bit(WQ_FLAG_DEDICATED, &wq->flags);
wq->threshold = 0;
} else if (sysfs_streq(buf, "shared")) {
clear_bit(WQ_FLAG_DEDICATED, &wq->flags);
} else {
return -EINVAL;
}
return count;
}
static struct device_attribute dev_attr_wq_mode =
__ATTR(mode, 0644, wq_mode_show, wq_mode_store);
static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%u\n", wq->size);
}
static int total_claimed_wq_size(struct idxd_device *idxd)
{
int i;
int wq_size = 0;
for (i = 0; i < idxd->max_wqs; i++) {
struct idxd_wq *wq = idxd->wqs[i];
wq_size += wq->size;
}
return wq_size;
}
static ssize_t wq_size_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
unsigned long size;
struct idxd_device *idxd = wq->idxd;
int rc;
rc = kstrtoul(buf, 10, &size);
if (rc < 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (size + total_claimed_wq_size(idxd) - wq->size > idxd->max_wq_size)
return -EINVAL;
wq->size = size;
return count;
}
static struct device_attribute dev_attr_wq_size =
__ATTR(size, 0644, wq_size_show, wq_size_store);
static ssize_t wq_priority_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%u\n", wq->priority);
}
static ssize_t wq_priority_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
unsigned long prio;
struct idxd_device *idxd = wq->idxd;
int rc;
rc = kstrtoul(buf, 10, &prio);
if (rc < 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
if (prio > IDXD_MAX_PRIORITY)
return -EINVAL;
wq->priority = prio;
return count;
}
static struct device_attribute dev_attr_wq_priority =
__ATTR(priority, 0644, wq_priority_show, wq_priority_store);
static ssize_t wq_block_on_fault_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags));
}
static ssize_t wq_block_on_fault_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
bool bof;
int rc;
if (!idxd->hw.gen_cap.block_on_fault)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -ENXIO;
rc = kstrtobool(buf, &bof);
if (rc < 0)
return rc;
if (bof)
set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
else
clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
return count;
}
static struct device_attribute dev_attr_wq_block_on_fault =
__ATTR(block_on_fault, 0644, wq_block_on_fault_show,
wq_block_on_fault_store);
static ssize_t wq_threshold_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%u\n", wq->threshold);
}
static ssize_t wq_threshold_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
unsigned int val;
int rc;
rc = kstrtouint(buf, 0, &val);
if (rc < 0)
return -EINVAL;
if (val > wq->size || val <= 0)
return -EINVAL;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -ENXIO;
if (test_bit(WQ_FLAG_DEDICATED, &wq->flags))
return -EINVAL;
wq->threshold = val;
return count;
}
static struct device_attribute dev_attr_wq_threshold =
__ATTR(threshold, 0644, wq_threshold_show, wq_threshold_store);
static ssize_t wq_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
switch (wq->type) {
case IDXD_WQT_KERNEL:
return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]);
case IDXD_WQT_USER:
return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]);
case IDXD_WQT_NONE:
default:
return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]);
}
return -EINVAL;
}
static ssize_t wq_type_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
enum idxd_wq_type old_type;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
old_type = wq->type;
if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_NONE]))
wq->type = IDXD_WQT_NONE;
else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL]))
wq->type = IDXD_WQT_KERNEL;
else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER]))
wq->type = IDXD_WQT_USER;
else
return -EINVAL;
/* If we are changing queue type, clear the name */
if (wq->type != old_type)
memset(wq->name, 0, WQ_NAME_SIZE + 1);
return count;
}
static struct device_attribute dev_attr_wq_type =
__ATTR(type, 0644, wq_type_show, wq_type_store);
static ssize_t wq_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%s\n", wq->name);
}
static ssize_t wq_name_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
char *input, *pos;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0)
return -EINVAL;
/*
* This is temporarily placed here until we have SVM support for
* dmaengine.
*/
if (wq->type == IDXD_WQT_KERNEL && device_pasid_enabled(wq->idxd))
return -EOPNOTSUPP;
input = kstrndup(buf, count, GFP_KERNEL);
if (!input)
return -ENOMEM;
pos = strim(input);
memset(wq->name, 0, WQ_NAME_SIZE + 1);
sprintf(wq->name, "%s", pos);
kfree(input);
return count;
}
static struct device_attribute dev_attr_wq_name =
__ATTR(name, 0644, wq_name_show, wq_name_store);
static ssize_t wq_cdev_minor_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
int minor = -1;
mutex_lock(&wq->wq_lock);
if (wq->idxd_cdev)
minor = wq->idxd_cdev->minor;
mutex_unlock(&wq->wq_lock);
if (minor == -1)
return -ENXIO;
return sysfs_emit(buf, "%d\n", minor);
}
static struct device_attribute dev_attr_wq_cdev_minor =
__ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL);
static int __get_sysfs_u64(const char *buf, u64 *val)
{
int rc;
rc = kstrtou64(buf, 0, val);
if (rc < 0)
return -EINVAL;
if (*val == 0)
return -EINVAL;
*val = roundup_pow_of_two(*val);
return 0;
}
static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes);
}
static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
u64 xfer_size;
int rc;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
rc = __get_sysfs_u64(buf, &xfer_size);
if (rc < 0)
return rc;
if (xfer_size > idxd->max_xfer_bytes)
return -EINVAL;
wq->max_xfer_bytes = xfer_size;
return count;
}
static struct device_attribute dev_attr_wq_max_transfer_size =
__ATTR(max_transfer_size, 0644,
wq_max_transfer_size_show, wq_max_transfer_size_store);
static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%u\n", wq->max_batch_size);
}
static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
u64 batch_size;
int rc;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
rc = __get_sysfs_u64(buf, &batch_size);
if (rc < 0)
return rc;
if (batch_size > idxd->max_batch_size)
return -EINVAL;
idxd_wq_set_max_batch_size(idxd->data->type, wq, (u32)batch_size);
return count;
}
static struct device_attribute dev_attr_wq_max_batch_size =
__ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store);
static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_ATS_DISABLE, &wq->flags));
}
static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
bool ats_dis;
int rc;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
if (!idxd->hw.wq_cap.wq_ats_support)
return -EOPNOTSUPP;
rc = kstrtobool(buf, &ats_dis);
if (rc < 0)
return rc;
if (ats_dis)
set_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
else
clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
return count;
}
static struct device_attribute dev_attr_wq_ats_disable =
__ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store);
static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
u32 occup, offset;
if (!idxd->hw.wq_cap.occupancy)
return -EOPNOTSUPP;
offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX);
occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK;
return sysfs_emit(buf, "%u\n", occup);
}
static struct device_attribute dev_attr_wq_occupancy =
__ATTR(occupancy, 0444, wq_occupancy_show, NULL);
static ssize_t wq_enqcmds_retries_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
if (wq_dedicated(wq))
return -EOPNOTSUPP;
return sysfs_emit(buf, "%u\n", wq->enqcmds_retries);
}
static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
int rc;
unsigned int retries;
if (wq_dedicated(wq))
return -EOPNOTSUPP;
rc = kstrtouint(buf, 10, &retries);
if (rc < 0)
return rc;
if (retries > IDXD_ENQCMDS_MAX_RETRIES)
retries = IDXD_ENQCMDS_MAX_RETRIES;
wq->enqcmds_retries = retries;
return count;
}
static struct device_attribute dev_attr_wq_enqcmds_retries =
__ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store);
static ssize_t wq_op_config_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, wq->opcap_bmap);
}
static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask)
{
int bit;
/*
* The OPCAP is defined as 256 bits that represents each operation the device
* supports per bit. Iterate through all the bits and check if the input mask
* is set for bits that are not set in the OPCAP for the device. If no OPCAP
* bit is set and input mask has the bit set, then return error.
*/
for_each_set_bit(bit, opmask, IDXD_MAX_OPCAP_BITS) {
if (!test_bit(bit, idxd->opcap_bmap))
return -EINVAL;
}
return 0;
}
static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
unsigned long *opmask;
int rc;
if (wq->state != IDXD_WQ_DISABLED)
return -EPERM;
opmask = bitmap_zalloc(IDXD_MAX_OPCAP_BITS, GFP_KERNEL);
if (!opmask)
return -ENOMEM;
rc = bitmap_parse(buf, count, opmask, IDXD_MAX_OPCAP_BITS);
if (rc < 0)
goto err;
rc = idxd_verify_supported_opcap(idxd, opmask);
if (rc < 0)
goto err;
bitmap_copy(wq->opcap_bmap, opmask, IDXD_MAX_OPCAP_BITS);
bitmap_free(opmask);
return count;
err:
bitmap_free(opmask);
return rc;
}
static struct device_attribute dev_attr_wq_op_config =
__ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store);
static struct attribute *idxd_wq_attributes[] = {
&dev_attr_wq_clients.attr,
&dev_attr_wq_state.attr,
&dev_attr_wq_group_id.attr,
&dev_attr_wq_mode.attr,
&dev_attr_wq_size.attr,
&dev_attr_wq_priority.attr,
&dev_attr_wq_block_on_fault.attr,
&dev_attr_wq_threshold.attr,
&dev_attr_wq_type.attr,
&dev_attr_wq_name.attr,
&dev_attr_wq_cdev_minor.attr,
&dev_attr_wq_max_transfer_size.attr,
&dev_attr_wq_max_batch_size.attr,
&dev_attr_wq_ats_disable.attr,
&dev_attr_wq_occupancy.attr,
&dev_attr_wq_enqcmds_retries.attr,
&dev_attr_wq_op_config.attr,
NULL,
};
static bool idxd_wq_attr_op_config_invisible(struct attribute *attr,
struct idxd_device *idxd)
{
return attr == &dev_attr_wq_op_config.attr &&
!idxd->hw.wq_cap.op_config;
}
static umode_t idxd_wq_attr_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct idxd_wq *wq = confdev_to_wq(dev);
struct idxd_device *idxd = wq->idxd;
if (idxd_wq_attr_op_config_invisible(attr, idxd))
return 0;
return attr->mode;
}
static const struct attribute_group idxd_wq_attribute_group = {
.attrs = idxd_wq_attributes,
.is_visible = idxd_wq_attr_visible,
};
static const struct attribute_group *idxd_wq_attribute_groups[] = {
&idxd_wq_attribute_group,
NULL,
};
static void idxd_conf_wq_release(struct device *dev)
{
struct idxd_wq *wq = confdev_to_wq(dev);
bitmap_free(wq->opcap_bmap);
kfree(wq->wqcfg);
kfree(wq);
}
struct device_type idxd_wq_device_type = {
.name = "wq",
.release = idxd_conf_wq_release,
.groups = idxd_wq_attribute_groups,
};
/* IDXD device attribs */
static ssize_t version_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%#x\n", idxd->hw.version);
}
static DEVICE_ATTR_RO(version);
static ssize_t max_work_queues_size_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->max_wq_size);
}
static DEVICE_ATTR_RO(max_work_queues_size);
static ssize_t max_groups_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->max_groups);
}
static DEVICE_ATTR_RO(max_groups);
static ssize_t max_work_queues_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->max_wqs);
}
static DEVICE_ATTR_RO(max_work_queues);
static ssize_t max_engines_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->max_engines);
}
static DEVICE_ATTR_RO(max_engines);
static ssize_t numa_node_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
}
static DEVICE_ATTR_RO(numa_node);
static ssize_t max_batch_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->max_batch_size);
}
static DEVICE_ATTR_RO(max_batch_size);
static ssize_t max_transfer_size_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes);
}
static DEVICE_ATTR_RO(max_transfer_size);
static ssize_t op_cap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, idxd->opcap_bmap);
}
static DEVICE_ATTR_RO(op_cap);
static ssize_t gen_cap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits);
}
static DEVICE_ATTR_RO(gen_cap);
static ssize_t configurable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
}
static DEVICE_ATTR_RO(configurable);
static ssize_t clients_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
int count = 0, i;
spin_lock(&idxd->dev_lock);
for (i = 0; i < idxd->max_wqs; i++) {
struct idxd_wq *wq = idxd->wqs[i];
count += wq->client_count;
}
spin_unlock(&idxd->dev_lock);
return sysfs_emit(buf, "%d\n", count);
}
static DEVICE_ATTR_RO(clients);
static ssize_t pasid_enabled_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd));
}
static DEVICE_ATTR_RO(pasid_enabled);
static ssize_t state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
switch (idxd->state) {
case IDXD_DEV_DISABLED:
return sysfs_emit(buf, "disabled\n");
case IDXD_DEV_ENABLED:
return sysfs_emit(buf, "enabled\n");
case IDXD_DEV_HALTED:
return sysfs_emit(buf, "halted\n");
}
return sysfs_emit(buf, "unknown\n");
}
static DEVICE_ATTR_RO(state);
static ssize_t errors_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
int i, out = 0;
spin_lock(&idxd->dev_lock);
for (i = 0; i < 4; i++)
out += sysfs_emit_at(buf, out, "%#018llx ", idxd->sw_err.bits[i]);
spin_unlock(&idxd->dev_lock);
out--;
out += sysfs_emit_at(buf, out, "\n");
return out;
}
static DEVICE_ATTR_RO(errors);
static ssize_t max_read_buffers_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->max_rdbufs);
}
static ssize_t max_tokens_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n");
return max_read_buffers_show(dev, attr, buf);
}
static DEVICE_ATTR_RO(max_tokens); /* deprecated */
static DEVICE_ATTR_RO(max_read_buffers);
static ssize_t read_buffer_limit_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit);
}
static ssize_t token_limit_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n");
return read_buffer_limit_show(dev, attr, buf);
}
static ssize_t read_buffer_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
unsigned long val;
int rc;
rc = kstrtoul(buf, 10, &val);
if (rc < 0)
return -EINVAL;
if (idxd->state == IDXD_DEV_ENABLED)
return -EPERM;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
if (!idxd->hw.group_cap.rdbuf_limit)
return -EPERM;
if (val > idxd->hw.group_cap.total_rdbufs)
return -EINVAL;
idxd->rdbuf_limit = val;
return count;
}
static ssize_t token_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n");
return read_buffer_limit_store(dev, attr, buf, count);
}
static DEVICE_ATTR_RW(token_limit); /* deprecated */
static DEVICE_ATTR_RW(read_buffer_limit);
static ssize_t cdev_major_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%u\n", idxd->major);
}
static DEVICE_ATTR_RO(cdev_major);
static ssize_t cmd_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
return sysfs_emit(buf, "%#x\n", idxd->cmd_status);
}
static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
idxd->cmd_status = 0;
return count;
}
static DEVICE_ATTR_RW(cmd_status);
static struct attribute *idxd_device_attributes[] = {
&dev_attr_version.attr,
&dev_attr_max_groups.attr,
&dev_attr_max_work_queues.attr,
&dev_attr_max_work_queues_size.attr,
&dev_attr_max_engines.attr,
&dev_attr_numa_node.attr,
&dev_attr_max_batch_size.attr,
&dev_attr_max_transfer_size.attr,
&dev_attr_op_cap.attr,
&dev_attr_gen_cap.attr,
&dev_attr_configurable.attr,
&dev_attr_clients.attr,
&dev_attr_pasid_enabled.attr,
&dev_attr_state.attr,
&dev_attr_errors.attr,
&dev_attr_max_tokens.attr,
&dev_attr_max_read_buffers.attr,
&dev_attr_token_limit.attr,
&dev_attr_read_buffer_limit.attr,
&dev_attr_cdev_major.attr,
&dev_attr_cmd_status.attr,
NULL,
};
static const struct attribute_group idxd_device_attribute_group = {
.attrs = idxd_device_attributes,
};
static const struct attribute_group *idxd_attribute_groups[] = {
&idxd_device_attribute_group,
NULL,
};
static void idxd_conf_device_release(struct device *dev)
{
struct idxd_device *idxd = confdev_to_idxd(dev);
kfree(idxd->groups);
bitmap_free(idxd->wq_enable_map);
kfree(idxd->wqs);
kfree(idxd->engines);
ida_free(&idxd_ida, idxd->id);
bitmap_free(idxd->opcap_bmap);
kfree(idxd);
}
struct device_type dsa_device_type = {
.name = "dsa",
.release = idxd_conf_device_release,
.groups = idxd_attribute_groups,
};
struct device_type iax_device_type = {
.name = "iax",
.release = idxd_conf_device_release,
.groups = idxd_attribute_groups,
};
static int idxd_register_engine_devices(struct idxd_device *idxd)
{
struct idxd_engine *engine;
int i, j, rc;
for (i = 0; i < idxd->max_engines; i++) {
engine = idxd->engines[i];
rc = device_add(engine_confdev(engine));
if (rc < 0)
goto cleanup;
}
return 0;
cleanup:
j = i - 1;
for (; i < idxd->max_engines; i++) {
engine = idxd->engines[i];
put_device(engine_confdev(engine));
}
while (j--) {
engine = idxd->engines[j];
device_unregister(engine_confdev(engine));
}
return rc;
}
static int idxd_register_group_devices(struct idxd_device *idxd)
{
struct idxd_group *group;
int i, j, rc;
for (i = 0; i < idxd->max_groups; i++) {
group = idxd->groups[i];
rc = device_add(group_confdev(group));
if (rc < 0)
goto cleanup;
}
return 0;
cleanup:
j = i - 1;
for (; i < idxd->max_groups; i++) {
group = idxd->groups[i];
put_device(group_confdev(group));
}
while (j--) {
group = idxd->groups[j];
device_unregister(group_confdev(group));
}
return rc;
}
static int idxd_register_wq_devices(struct idxd_device *idxd)
{
struct idxd_wq *wq;
int i, rc, j;
for (i = 0; i < idxd->max_wqs; i++) {
wq = idxd->wqs[i];
rc = device_add(wq_confdev(wq));
if (rc < 0)
goto cleanup;
}
return 0;
cleanup:
j = i - 1;
for (; i < idxd->max_wqs; i++) {
wq = idxd->wqs[i];
put_device(wq_confdev(wq));
}
while (j--) {
wq = idxd->wqs[j];
device_unregister(wq_confdev(wq));
}
return rc;
}
int idxd_register_devices(struct idxd_device *idxd)
{
struct device *dev = &idxd->pdev->dev;
int rc, i;
rc = device_add(idxd_confdev(idxd));
if (rc < 0)
return rc;
rc = idxd_register_wq_devices(idxd);
if (rc < 0) {
dev_dbg(dev, "WQ devices registering failed: %d\n", rc);
goto err_wq;
}
rc = idxd_register_engine_devices(idxd);
if (rc < 0) {
dev_dbg(dev, "Engine devices registering failed: %d\n", rc);
goto err_engine;
}
rc = idxd_register_group_devices(idxd);
if (rc < 0) {
dev_dbg(dev, "Group device registering failed: %d\n", rc);
goto err_group;
}
return 0;
err_group:
for (i = 0; i < idxd->max_engines; i++)
device_unregister(engine_confdev(idxd->engines[i]));
err_engine:
for (i = 0; i < idxd->max_wqs; i++)
device_unregister(wq_confdev(idxd->wqs[i]));
err_wq:
device_del(idxd_confdev(idxd));
return rc;
}
void idxd_unregister_devices(struct idxd_device *idxd)
{
int i;
for (i = 0; i < idxd->max_wqs; i++) {
struct idxd_wq *wq = idxd->wqs[i];
device_unregister(wq_confdev(wq));
}
for (i = 0; i < idxd->max_engines; i++) {
struct idxd_engine *engine = idxd->engines[i];
device_unregister(engine_confdev(engine));
}
for (i = 0; i < idxd->max_groups; i++) {
struct idxd_group *group = idxd->groups[i];
device_unregister(group_confdev(group));
}
}
int idxd_register_bus_type(void)
{
return bus_register(&dsa_bus_type);
}
void idxd_unregister_bus_type(void)
{
bus_unregister(&dsa_bus_type);
}
