1 files changed, 353 insertions, 0 deletions
diff --git a/drivers/crypto/intel/qat/qat_common/adf_sysfs.c b/drivers/crypto/intel/qat/qat_common/adf_sysfs.c
new file mode 100644
index 000000000000..79c63dfa8ff3
--- /dev/null
+++ b/drivers/crypto/intel/qat/qat_common/adf_sysfs.c
@@ -0,0 +1,353 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2022 Intel Corporation */
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/string_choices.h>
+#include "adf_accel_devices.h"
+#include "adf_cfg.h"
+#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",
+};
+
+static ssize_t state_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	struct adf_accel_dev *accel_dev;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	return sysfs_emit(buf, "%s\n", str_up_down(adf_dev_started(accel_dev)));
+}
+
+static ssize_t state_store(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct adf_accel_dev *accel_dev;
+	u32 accel_id;
+	int ret;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	accel_id = accel_dev->accel_id;
+
+	if (adf_devmgr_in_reset(accel_dev) || adf_dev_in_use(accel_dev)) {
+		dev_info(dev, "Device qat_dev%d is busy\n", accel_id);
+		return -EBUSY;
+	}
+
+	ret = sysfs_match_string(state_operations, buf);
+	if (ret < 0)
+		return ret;
+
+	switch (ret) {
+	case DEV_DOWN:
+		dev_info(dev, "Stopping device qat_dev%d\n", accel_id);
+
+		if (!adf_dev_started(accel_dev)) {
+			dev_info(&GET_DEV(accel_dev), "Device qat_dev%d already down\n",
+				 accel_id);
+
+			break;
+		}
+
+		ret = adf_dev_down(accel_dev);
+		if (ret)
+			return ret;
+
+		break;
+	case DEV_UP:
+		dev_info(dev, "Starting device qat_dev%d\n", accel_id);
+
+		ret = adf_dev_up(accel_dev, true);
+		if (ret == -EALREADY) {
+			break;
+		} else if (ret) {
+			dev_err(dev, "Failed to start device qat_dev%d\n",
+				accel_id);
+			adf_dev_down(accel_dev);
+			return ret;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+static ssize_t cfg_services_show(struct device *dev, struct device_attribute *attr,
+				 char *buf)
+{
+	char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
+	struct adf_accel_dev *accel_dev;
+	int ret;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
+				      ADF_SERVICES_ENABLED, services);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%s\n", services);
+}
+
+static int adf_sysfs_update_dev_config(struct adf_accel_dev *accel_dev,
+				       const char *services)
+{
+	return adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
+					   ADF_SERVICES_ENABLED, services,
+					   ADF_STR);
+}
+
+static ssize_t cfg_services_store(struct device *dev, struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = { };
+	struct adf_hw_device_data *hw_data;
+	struct adf_accel_dev *accel_dev;
+	int ret;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	ret = adf_parse_service_string(accel_dev, buf, count, services,
+				       ADF_CFG_MAX_VAL_LEN_IN_BYTES);
+	if (ret)
+		return ret;
+
+	if (adf_dev_started(accel_dev)) {
+		dev_info(dev, "Device qat_dev%d must be down to reconfigure the service.\n",
+			 accel_dev->accel_id);
+		return -EINVAL;
+	}
+
+	ret = adf_sysfs_update_dev_config(accel_dev, services);
+	if (ret < 0)
+		return ret;
+
+	hw_data = GET_HW_DATA(accel_dev);
+
+	/* Update capabilities mask after change in configuration.
+	 * A call to this function is required as capabilities are, at the
+	 * moment, tied to configuration
+	 */
+	hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
+	if (!hw_data->accel_capabilities_mask)
+		return -EINVAL;
+
+	return count;
+}
+
+static ssize_t pm_idle_enabled_show(struct device *dev, struct device_attribute *attr,
+				    char *buf)
+{
+	char pm_idle_enabled[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {};
+	struct adf_accel_dev *accel_dev;
+	int ret;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
+				      ADF_PM_IDLE_SUPPORT, pm_idle_enabled);
+	if (ret)
+		return sysfs_emit(buf, "1\n");
+
+	return sysfs_emit(buf, "%s\n", pm_idle_enabled);
+}
+
+static ssize_t pm_idle_enabled_store(struct device *dev, struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	unsigned long pm_idle_enabled_cfg_val;
+	struct adf_accel_dev *accel_dev;
+	bool pm_idle_enabled;
+	int ret;
+
+	ret = kstrtobool(buf, &pm_idle_enabled);
+	if (ret)
+		return ret;
+
+	pm_idle_enabled_cfg_val = pm_idle_enabled;
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	if (adf_dev_started(accel_dev)) {
+		dev_info(dev, "Device qat_dev%d must be down to set pm_idle_enabled.\n",
+			 accel_dev->accel_id);
+		return -EINVAL;
+	}
+
+	ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
+					  ADF_PM_IDLE_SUPPORT, &pm_idle_enabled_cfg_val,
+					  ADF_DEC);
+	if (ret)
+		return ret;
+
+	return count;
+}
+static DEVICE_ATTR_RW(pm_idle_enabled);
+
+static ssize_t auto_reset_show(struct device *dev, struct device_attribute *attr,
+			       char *buf)
+{
+	struct adf_accel_dev *accel_dev;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	return sysfs_emit(buf, "%s\n", str_on_off(accel_dev->autoreset_on_error));
+}
+
+static ssize_t auto_reset_store(struct device *dev, struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct adf_accel_dev *accel_dev;
+	bool enabled = false;
+	int ret;
+
+	ret = kstrtobool(buf, &enabled);
+	if (ret)
+		return ret;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	accel_dev->autoreset_on_error = enabled;
+
+	return count;
+}
+static DEVICE_ATTR_RW(auto_reset);
+
+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));
+	if (!accel_dev)
+		return -EINVAL;
+
+	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);
+	case DECOMP:
+		return sysfs_emit(buf, "%s\n", ADF_CFG_DECOMP);
+	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 num_rings, ret;
+	unsigned int ring;
+
+	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 ssize_t num_rps_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct adf_accel_dev *accel_dev;
+
+	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
+	if (!accel_dev)
+		return -EINVAL;
+
+	return sysfs_emit(buf, "%u\n", GET_MAX_BANKS(accel_dev));
+}
+static DEVICE_ATTR_RO(num_rps);
+
+static struct attribute *qat_attrs[] = {
+	&dev_attr_state.attr,
+	&dev_attr_cfg_services.attr,
+	&dev_attr_pm_idle_enabled.attr,
+	&dev_attr_rp2srv.attr,
+	&dev_attr_num_rps.attr,
+	&dev_attr_auto_reset.attr,
+	NULL,
+};
+
+static struct attribute_group qat_group = {
+	.attrs = qat_attrs,
+	.name = "qat",
+};
+
+int adf_sysfs_init(struct adf_accel_dev *accel_dev)
+{
+	int ret;
+
+	ret = devm_device_add_group(&GET_DEV(accel_dev), &qat_group);
+	if (ret) {
+		dev_err(&GET_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);