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-rw-r--r--drivers/dma/idxd/sysfs.c1818
1 files changed, 1818 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
new file mode 100644
index 000000000..6e1e14b37
--- /dev/null
+++ b/drivers/dma/idxd/sysfs.c
@@ -0,0 +1,1818 @@
+// 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 bool idxd_group_attr_read_buffers_invisible(struct attribute *attr,
+ struct idxd_device *idxd)
+{
+ /*
+ * Intel IAA does not support Read Buffer allocation control,
+ * make these attributes invisible.
+ */
+ return (attr == &dev_attr_group_use_token_limit.attr ||
+ attr == &dev_attr_group_use_read_buffer_limit.attr ||
+ attr == &dev_attr_group_tokens_allowed.attr ||
+ attr == &dev_attr_group_read_buffers_allowed.attr ||
+ attr == &dev_attr_group_tokens_reserved.attr ||
+ attr == &dev_attr_group_read_buffers_reserved.attr) &&
+ idxd->data->type == IDXD_TYPE_IAX;
+}
+
+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;
+
+ if (idxd_group_attr_read_buffers_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 bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr,
+ struct idxd_device *idxd)
+{
+ /* Intel IAA does not support batch processing, make it invisible */
+ return attr == &dev_attr_wq_max_batch_size.attr &&
+ idxd->data->type == IDXD_TYPE_IAX;
+}
+
+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;
+
+ if (idxd_wq_attr_max_batch_size_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_user_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 bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr,
+ struct idxd_device *idxd)
+{
+ /* Intel IAA does not support batch processing, make it invisible */
+ return attr == &dev_attr_max_batch_size.attr &&
+ idxd->data->type == IDXD_TYPE_IAX;
+}
+
+static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr,
+ struct idxd_device *idxd)
+{
+ /*
+ * Intel IAA does not support Read Buffer allocation control,
+ * make these attributes invisible.
+ */
+ return (attr == &dev_attr_max_tokens.attr ||
+ attr == &dev_attr_max_read_buffers.attr ||
+ attr == &dev_attr_token_limit.attr ||
+ attr == &dev_attr_read_buffer_limit.attr) &&
+ idxd->data->type == IDXD_TYPE_IAX;
+}
+
+static umode_t idxd_device_attr_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct idxd_device *idxd = confdev_to_idxd(dev);
+
+ if (idxd_device_attr_max_batch_size_invisible(attr, idxd))
+ return 0;
+
+ if (idxd_device_attr_read_buffers_invisible(attr, idxd))
+ return 0;
+
+ return attr->mode;
+}
+
+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,
+ .is_visible = idxd_device_attr_visible,
+};
+
+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);
+}