diff options
| -rw-r--r-- | Documentation/ABI/stable/sysfs-driver-dma-idxd | 17 | ||||
| -rw-r--r-- | drivers/dma/idxd/cdev.c | 46 |
2 files changed, 63 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd index e01916611452..73ab86196a41 100644 --- a/Documentation/ABI/stable/sysfs-driver-dma-idxd +++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd @@ -318,3 +318,20 @@ Description: Allows control of the number of batch descriptors that can be 1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of the max value). It's visible only on platforms that support the capability. + +What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/cr_faults +Date: Sept 14, 2022 +KernelVersion: 6.4.0 +Contact: [email protected] +Description: Show the number of Completion Record (CR) faults this application + has caused. + +What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/cr_fault_failures +Date: Sept 14, 2022 +KernelVersion: 6.4.0 +Contact: [email protected] +Description: Show the number of Completion Record (CR) faults failures that this + application has caused. The failure counter is incremented when the + driver cannot fault in the address for the CR. Typically this is caused + by a bad address programmed in the submitted descriptor or a malicious + submitter is using bad CR address on purpose. diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index e07411053e21..2fb905f2545b 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -61,6 +61,51 @@ static inline struct idxd_user_context *dev_to_uctx(struct device *dev) return container_of(idxd_dev, struct idxd_user_context, idxd_dev); } +static ssize_t cr_faults_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct idxd_user_context *ctx = dev_to_uctx(dev); + + return sysfs_emit(buf, "%llu\n", ctx->counters[COUNTER_FAULTS]); +} +static DEVICE_ATTR_RO(cr_faults); + +static ssize_t cr_fault_failures_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct idxd_user_context *ctx = dev_to_uctx(dev); + + return sysfs_emit(buf, "%llu\n", ctx->counters[COUNTER_FAULT_FAILS]); +} +static DEVICE_ATTR_RO(cr_fault_failures); + +static struct attribute *cdev_file_attributes[] = { + &dev_attr_cr_faults.attr, + &dev_attr_cr_fault_failures.attr, + NULL +}; + +static umode_t cdev_file_attr_visible(struct kobject *kobj, struct attribute *a, int n) +{ + struct device *dev = container_of(kobj, typeof(*dev), kobj); + struct idxd_user_context *ctx = dev_to_uctx(dev); + struct idxd_wq *wq = ctx->wq; + + if (!wq_pasid_enabled(wq)) + return 0; + + return a->mode; +} + +static const struct attribute_group cdev_file_attribute_group = { + .attrs = cdev_file_attributes, + .is_visible = cdev_file_attr_visible, +}; + +static const struct attribute_group *cdev_file_attribute_groups[] = { + &cdev_file_attribute_group, + NULL +}; + static void idxd_file_dev_release(struct device *dev) { struct idxd_user_context *ctx = dev_to_uctx(dev); @@ -100,6 +145,7 @@ static void idxd_file_dev_release(struct device *dev) static struct device_type idxd_cdev_file_type = { .name = "idxd_file", .release = idxd_file_dev_release, + .groups = cdev_file_attribute_groups, }; static void idxd_cdev_dev_release(struct device *dev) |