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path: root/drivers/dma/idxd/sysfs.c
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Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
-rw-r--r--drivers/dma/idxd/sysfs.c207
1 files changed, 204 insertions, 3 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 07a5db06a29a..266423a2cabc 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -41,14 +41,24 @@ static struct device_type dsa_device_type = {
.release = idxd_conf_device_release,
};
+static struct device_type iax_device_type = {
+ .name = "iax",
+ .release = idxd_conf_device_release,
+};
+
static inline bool is_dsa_dev(struct device *dev)
{
return dev ? dev->type == &dsa_device_type : false;
}
+static inline bool is_iax_dev(struct device *dev)
+{
+ return dev ? dev->type == &iax_device_type : false;
+}
+
static inline bool is_idxd_dev(struct device *dev)
{
- return is_dsa_dev(dev);
+ return is_dsa_dev(dev) || is_iax_dev(dev);
}
static inline bool is_idxd_wq_dev(struct device *dev)
@@ -175,6 +185,30 @@ static int idxd_config_bus_probe(struct device *dev)
return -EINVAL;
}
+ /* Shared WQ checks */
+ if (wq_shared(wq)) {
+ if (!device_swq_supported(idxd)) {
+ dev_warn(dev,
+ "PASID not enabled and shared WQ.\n");
+ mutex_unlock(&wq->wq_lock);
+ return -ENXIO;
+ }
+ /*
+ * Shared wq with the threshold set to 0 means the user
+ * did not set the threshold or transitioned from a
+ * dedicated wq but did not set threshold. A value
+ * of 0 would effectively disable the shared wq. The
+ * driver does not allow a value of 0 to be set for
+ * threshold via sysfs.
+ */
+ if (wq->threshold == 0) {
+ dev_warn(dev,
+ "Shared WQ and threshold 0.\n");
+ mutex_unlock(&wq->wq_lock);
+ return -EINVAL;
+ }
+ }
+
rc = idxd_wq_alloc_resources(wq);
if (rc < 0) {
mutex_unlock(&wq->wq_lock);
@@ -335,8 +369,17 @@ struct bus_type dsa_bus_type = {
.shutdown = idxd_config_bus_shutdown,
};
+struct bus_type iax_bus_type = {
+ .name = "iax",
+ .match = idxd_config_bus_match,
+ .probe = idxd_config_bus_probe,
+ .remove = idxd_config_bus_remove,
+ .shutdown = idxd_config_bus_shutdown,
+};
+
static struct bus_type *idxd_bus_types[] = {
- &dsa_bus_type
+ &dsa_bus_type,
+ &iax_bus_type
};
static struct idxd_device_driver dsa_drv = {
@@ -348,8 +391,18 @@ static struct idxd_device_driver dsa_drv = {
},
};
+static struct idxd_device_driver iax_drv = {
+ .drv = {
+ .name = "iax",
+ .bus = &iax_bus_type,
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ },
+};
+
static struct idxd_device_driver *idxd_drvs[] = {
- &dsa_drv
+ &dsa_drv,
+ &iax_drv
};
struct bus_type *idxd_get_bus_type(struct idxd_device *idxd)
@@ -361,6 +414,8 @@ static struct device_type *idxd_get_device_type(struct idxd_device *idxd)
{
if (idxd->type == IDXD_TYPE_DSA)
return &dsa_device_type;
+ else if (idxd->type == IDXD_TYPE_IAX)
+ return &iax_device_type;
else
return NULL;
}
@@ -501,6 +556,9 @@ static ssize_t group_tokens_reserved_store(struct device *dev,
if (rc < 0)
return -EINVAL;
+ if (idxd->type == IDXD_TYPE_IAX)
+ return -EOPNOTSUPP;
+
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
@@ -546,6 +604,9 @@ static ssize_t group_tokens_allowed_store(struct device *dev,
if (rc < 0)
return -EINVAL;
+ if (idxd->type == IDXD_TYPE_IAX)
+ return -EOPNOTSUPP;
+
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
@@ -588,6 +649,9 @@ static ssize_t group_use_token_limit_store(struct device *dev,
if (rc < 0)
return -EINVAL;
+ if (idxd->type == IDXD_TYPE_IAX)
+ return -EOPNOTSUPP;
+
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
@@ -875,6 +939,8 @@ static ssize_t wq_mode_store(struct device *dev,
if (sysfs_streq(buf, "dedicated")) {
set_bit(WQ_FLAG_DEDICATED, &wq->flags);
wq->threshold = 0;
+ } else if (sysfs_streq(buf, "shared") && device_swq_supported(idxd)) {
+ clear_bit(WQ_FLAG_DEDICATED, &wq->flags);
} else {
return -EINVAL;
}
@@ -973,6 +1039,87 @@ static ssize_t wq_priority_store(struct device *dev,
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 = container_of(dev, struct idxd_wq, conf_dev);
+
+ return sprintf(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 = container_of(dev, struct idxd_wq, conf_dev);
+ struct idxd_device *idxd = wq->idxd;
+ bool bof;
+ int rc;
+
+ 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 = container_of(dev, struct idxd_wq, conf_dev);
+
+ return sprintf(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 = container_of(dev, struct idxd_wq, conf_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)
{
@@ -1044,6 +1191,13 @@ static ssize_t wq_name_store(struct device *dev,
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;
+
memset(wq->name, 0, WQ_NAME_SIZE + 1);
strncpy(wq->name, buf, WQ_NAME_SIZE);
strreplace(wq->name, '\n', '\0');
@@ -1147,6 +1301,39 @@ static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribu
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 = container_of(dev, struct idxd_wq, conf_dev);
+
+ return sprintf(buf, "%u\n", wq->ats_dis);
+}
+
+static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_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;
+
+ wq->ats_dis = ats_dis;
+
+ return count;
+}
+
+static struct device_attribute dev_attr_wq_ats_disable =
+ __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store);
+
static struct attribute *idxd_wq_attributes[] = {
&dev_attr_wq_clients.attr,
&dev_attr_wq_state.attr,
@@ -1154,11 +1341,14 @@ static struct attribute *idxd_wq_attributes[] = {
&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,
NULL,
};
@@ -1305,6 +1495,16 @@ static ssize_t clients_show(struct device *dev,
}
static DEVICE_ATTR_RO(clients);
+static ssize_t pasid_enabled_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct idxd_device *idxd =
+ container_of(dev, struct idxd_device, conf_dev);
+
+ return sprintf(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)
{
@@ -1424,6 +1624,7 @@ static struct attribute *idxd_device_attributes[] = {
&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,
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-07 12:17:18 +0300