@@ -95,3 +95,35 @@ Description: (RW) This configuration option provides a way to force the device i
0
This attribute is only available for qat_4xxx devices.
+
+What: /sys/bus/pci/devices/<BDF>/qat/rp2srv
+Date: January 2024
+KernelVersion: 6.7
+Contact: qat-linux@intel.com
+Description:
+ (RW) This attribute provides a way for a user to query a
+ specific ring pair for the type of service that it is currently
+ configured for.
+
+ When written to, the value is cached and used to perform the
+ read operation. Allowed values are in the range 0 to N-1, where
+ N is the max number of ring pairs supported by a device. This
+ can be queried using the attribute qat/num_rps.
+
+ A read returns the service associated to the ring pair queried.
+
+ The values are:
+
+ * dc: the ring pair is configured for running compression services
+ * sym: the ring pair is configured for running symmetric crypto
+ services
+ * asym: the ring pair is configured for running asymmetric crypto
+ services
+
+ Example usage::
+
+ # echo 1 > /sys/bus/pci/devices/<BDF>/qat/rp2srv
+ # cat /sys/bus/pci/devices/<BDF>/qat/rp2srv
+ sym
+
+ This attribute is only available for qat_4xxx devices.
@@ -307,6 +307,11 @@ struct adf_pm {
char __user *buf, size_t count, loff_t *pos);
};
+struct adf_sysfs {
+ int ring_num;
+ struct rw_semaphore lock; /* protects access to the fields in this struct */
+};
+
struct adf_accel_dev {
struct adf_etr_data *transport;
struct adf_hw_device_data *hw_device;
@@ -328,6 +333,7 @@ struct adf_accel_dev {
struct adf_timer *timer;
struct adf_heartbeat *heartbeat;
struct adf_rl *rate_limiting;
+ struct adf_sysfs sysfs;
union {
struct {
/* protects VF2PF interrupts access */
@@ -8,6 +8,8 @@
#include "adf_cfg_services.h"
#include "adf_common_drv.h"
+#define UNSET_RING_NUM -1
+
static const char * const state_operations[] = {
[DEV_DOWN] = "down",
[DEV_UP] = "up",
@@ -205,10 +207,72 @@ static DEVICE_ATTR_RW(pm_idle_enabled);
static DEVICE_ATTR_RW(state);
static DEVICE_ATTR_RW(cfg_services);
+static ssize_t rp2srv_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct adf_hw_device_data *hw_data;
+ struct adf_accel_dev *accel_dev;
+ enum adf_cfg_service_type svc;
+
+ accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+ hw_data = GET_HW_DATA(accel_dev);
+
+ if (accel_dev->sysfs.ring_num == UNSET_RING_NUM)
+ return -EINVAL;
+
+ down_read(&accel_dev->sysfs.lock);
+ svc = GET_SRV_TYPE(accel_dev, accel_dev->sysfs.ring_num %
+ hw_data->num_banks_per_vf);
+ up_read(&accel_dev->sysfs.lock);
+
+ switch (svc) {
+ case COMP:
+ return sysfs_emit(buf, "%s\n", ADF_CFG_DC);
+ case SYM:
+ return sysfs_emit(buf, "%s\n", ADF_CFG_SYM);
+ case ASYM:
+ return sysfs_emit(buf, "%s\n", ADF_CFG_ASYM);
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+static ssize_t rp2srv_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct adf_accel_dev *accel_dev;
+ int ring, num_rings, ret;
+
+ accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+ if (!accel_dev)
+ return -EINVAL;
+
+ ret = kstrtouint(buf, 10, &ring);
+ if (ret)
+ return ret;
+
+ num_rings = GET_MAX_BANKS(accel_dev);
+ if (ring >= num_rings) {
+ dev_err(&GET_DEV(accel_dev),
+ "Device does not support more than %u ring pairs\n",
+ num_rings);
+ return -EINVAL;
+ }
+
+ down_write(&accel_dev->sysfs.lock);
+ accel_dev->sysfs.ring_num = ring;
+ up_write(&accel_dev->sysfs.lock);
+
+ return count;
+}
+static DEVICE_ATTR_RW(rp2srv);
+
static struct attribute *qat_attrs[] = {
&dev_attr_state.attr,
&dev_attr_cfg_services.attr,
&dev_attr_pm_idle_enabled.attr,
+ &dev_attr_rp2srv.attr,
NULL,
};
@@ -227,6 +291,8 @@ int adf_sysfs_init(struct adf_accel_dev *accel_dev)
"Failed to create qat attribute group: %d\n", ret);
}
+ accel_dev->sysfs.ring_num = UNSET_RING_NUM;
+
return ret;
}
EXPORT_SYMBOL_GPL(adf_sysfs_init);