crypto: qat - add pm_status debugfs file

QAT devices implement a mechanism that allows them to go autonomously
to a low power state depending on the load.

Expose power management info by providing the "pm_status" file under
debugfs. This includes PM state, PM event log, PM event counters, PM HW
CSRs, per-resource type constrain counters and per-domain power gating
status specific to the QAT device.

This information is retrieved from (1) the FW by means of
ICP_QAT_FW_PM_INFO command, (2) CSRs and (3) counters collected by the
device driver.

In addition, add logic to keep track and report power management event
interrupts and acks/nacks sent to FW to allow/prevent state transitions.
Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/ABI/testing/debugfs-driver-qat

@@ -59,3 +59,12 @@ Description:	(RO) Read returns the device health status.
 
 		The driver does not monitor for Heartbeat. It is left for a user
 		to poll the status periodically.
+
+What:		/sys/kernel/debug/qat_<device>_<BDF>/pm_status
+Date:		January 2024
+KernelVersion:	6.7
+Contact:	qat-linux@intel.com
+Description:	(RO) Read returns power management information specific to the
+		QAT device.
+
+		This attribute is only available for qat_4xxx devices.

drivers/crypto/intel/qat/qat_common/Makefile

@@ -32,8 +32,10 @@ intel_qat-objs := adf_cfg.o \
 
 intel_qat-$(CONFIG_DEBUG_FS) += adf_transport_debug.o \
 				adf_fw_counters.o \
+				adf_gen4_pm_debugfs.o \
 				adf_heartbeat.o \
 				adf_heartbeat_dbgfs.o \
+				adf_pm_dbgfs.o \
 				adf_dbgfs.o
 
 intel_qat-$(CONFIG_PCI_IOV) += adf_sriov.o adf_vf_isr.o adf_pfvf_utils.o \

drivers/crypto/intel/qat/qat_common/adf_accel_devices.h

@@ -291,6 +291,18 @@ struct adf_dc_data {
 	dma_addr_t ovf_buff_p;
 };
 
+struct adf_pm {
+	struct dentry *debugfs_pm_status;
+	bool present;
+	int idle_irq_counters;
+	int throttle_irq_counters;
+	int fw_irq_counters;
+	int host_ack_counter;
+	int host_nack_counter;
+	ssize_t (*print_pm_status)(struct adf_accel_dev *accel_dev,
+				   char __user *buf, size_t count, loff_t *pos);
+};
+
 struct adf_accel_dev {
 	struct adf_etr_data *transport;
 	struct adf_hw_device_data *hw_device;
@@ -298,6 +310,7 @@ struct adf_accel_dev {
 	struct adf_fw_loader_data *fw_loader;
 	struct adf_admin_comms *admin;
 	struct adf_dc_data *dc_data;
+	struct adf_pm power_management;
 	struct list_head crypto_list;
 	struct list_head compression_list;
 	unsigned long status;

drivers/crypto/intel/qat/qat_common/adf_admin.c

@@ -379,6 +379,33 @@ int adf_init_admin_pm(struct adf_accel_dev *accel_dev, u32 idle_delay)
 	return adf_send_admin(accel_dev, &req, &resp, ae_mask);
 }
 
+int adf_get_pm_info(struct adf_accel_dev *accel_dev, dma_addr_t p_state_addr,
+		    size_t buff_size)
+{
+	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+	struct icp_qat_fw_init_admin_req req = { };
+	struct icp_qat_fw_init_admin_resp resp;
+	u32 ae_mask = hw_data->admin_ae_mask;
+	int ret;
+
+	/* Query pm info via init/admin cmd */
+	if (!accel_dev->admin) {
+		dev_err(&GET_DEV(accel_dev), "adf_admin is not available\n");
+		return -EFAULT;
+	}
+
+	req.cmd_id = ICP_QAT_FW_PM_INFO;
+	req.init_cfg_sz = buff_size;
+	req.init_cfg_ptr = p_state_addr;
+
+	ret = adf_send_admin(accel_dev, &req, &resp, ae_mask);
+	if (ret)
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to query power-management info\n");
+
+	return ret;
+}
+
 int adf_init_admin_comms(struct adf_accel_dev *accel_dev)
 {
 	struct adf_admin_comms *admin;

drivers/crypto/intel/qat/qat_common/adf_common_drv.h

@@ -95,6 +95,7 @@ int adf_init_admin_pm(struct adf_accel_dev *accel_dev, u32 idle_delay);
 int adf_send_admin_tim_sync(struct adf_accel_dev *accel_dev, u32 cnt);
 int adf_send_admin_hb_timer(struct adf_accel_dev *accel_dev, uint32_t ticks);
 int adf_get_fw_timestamp(struct adf_accel_dev *accel_dev, u64 *timestamp);
+int adf_get_pm_info(struct adf_accel_dev *accel_dev, dma_addr_t p_state_addr, size_t buff_size);
 int adf_init_arb(struct adf_accel_dev *accel_dev);
 void adf_exit_arb(struct adf_accel_dev *accel_dev);
 void adf_update_ring_arb(struct adf_etr_ring_data *ring);

drivers/crypto/intel/qat/qat_common/adf_dbgfs.c

@@ -8,6 +8,7 @@
 #include "adf_dbgfs.h"
 #include "adf_fw_counters.h"
 #include "adf_heartbeat_dbgfs.h"
+#include "adf_pm_dbgfs.h"
 
 /**
  * adf_dbgfs_init() - add persistent debugfs entries
@@ -62,6 +63,7 @@ void adf_dbgfs_add(struct adf_accel_dev *accel_dev)
 	if (!accel_dev->is_vf) {
 		adf_fw_counters_dbgfs_add(accel_dev);
 		adf_heartbeat_dbgfs_add(accel_dev);
+		adf_pm_dbgfs_add(accel_dev);
 	}
 }
 
@@ -75,6 +77,7 @@ void adf_dbgfs_rm(struct adf_accel_dev *accel_dev)
 		return;
 
 	if (!accel_dev->is_vf) {
+		adf_pm_dbgfs_rm(accel_dev);
 		adf_heartbeat_dbgfs_rm(accel_dev);
 		adf_fw_counters_dbgfs_rm(accel_dev);
 	}

drivers/crypto/intel/qat/qat_common/adf_gen4_pm.c

@@ -12,11 +12,6 @@
 #include "adf_gen4_hw_data.h"
 #include "adf_cfg.h"
 
-enum qat_pm_host_msg {
-	PM_NO_CHANGE = 0,
-	PM_SET_MIN,
-};
-
 struct adf_gen4_pm_data {
 	struct work_struct pm_irq_work;
 	struct adf_accel_dev *accel_dev;
@@ -27,6 +22,7 @@ static int send_host_msg(struct adf_accel_dev *accel_dev)
 {
 	char pm_idle_support_cfg[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {};
 	void __iomem *pmisc = adf_get_pmisc_base(accel_dev);
+	struct adf_pm *pm = &accel_dev->power_management;
 	bool pm_idle_support;
 	u32 msg;
 	int ret;
@@ -41,6 +37,11 @@ static int send_host_msg(struct adf_accel_dev *accel_dev)
 	if (ret)
 		pm_idle_support = true;
 
+	if (pm_idle_support)
+		pm->host_ack_counter++;
+	else
+		pm->host_nack_counter++;
+
 	/* Send HOST_MSG */
 	msg = FIELD_PREP(ADF_GEN4_PM_MSG_PAYLOAD_BIT_MASK,
 			 pm_idle_support ? PM_SET_MIN : PM_NO_CHANGE);
@@ -61,17 +62,27 @@ static void pm_bh_handler(struct work_struct *work)
 		container_of(work, struct adf_gen4_pm_data, pm_irq_work);
 	struct adf_accel_dev *accel_dev = pm_data->accel_dev;
 	void __iomem *pmisc = adf_get_pmisc_base(accel_dev);
+	struct adf_pm *pm = &accel_dev->power_management;
 	u32 pm_int_sts = pm_data->pm_int_sts;
 	u32 val;
 
 	/* PM Idle interrupt */
 	if (pm_int_sts & ADF_GEN4_PM_IDLE_STS) {
+		pm->idle_irq_counters++;
 		/* Issue host message to FW */
 		if (send_host_msg(accel_dev))
 			dev_warn_ratelimited(&GET_DEV(accel_dev),
 					     "Failed to send host msg to FW\n");
 	}
 
+	/* PM throttle interrupt */
+	if (pm_int_sts & ADF_GEN4_PM_THR_STS)
+		pm->throttle_irq_counters++;
+
+	/* PM fw interrupt */
+	if (pm_int_sts & ADF_GEN4_PM_FW_INT_STS)
+		pm->fw_irq_counters++;
+
 	/* Clear interrupt status */
 	ADF_CSR_WR(pmisc, ADF_GEN4_PM_INTERRUPT, pm_int_sts);
 
@@ -131,6 +142,9 @@ int adf_gen4_enable_pm(struct adf_accel_dev *accel_dev)
 	if (ret)
 		return ret;
 
+	/* Initialize PM internal data */
+	adf_gen4_init_dev_pm_data(accel_dev);
+
 	/* Enable default PM interrupts: IDLE, THROTTLE */
 	val = ADF_CSR_RD(pmisc, ADF_GEN4_PM_INTERRUPT);
 	val |= ADF_GEN4_PM_INT_EN_DEFAULT;

drivers/crypto/intel/qat/qat_common/adf_gen4_pm.h

@@ -7,6 +7,11 @@
 
 struct adf_accel_dev;
 
+enum qat_pm_host_msg {
+	PM_NO_CHANGE = 0,
+	PM_SET_MIN,
+};
+
 /* Power management registers */
 #define ADF_GEN4_PM_HOST_MSG (0x50A01C)
 
@@ -41,7 +46,48 @@ struct adf_accel_dev;
 #define ADF_GEN4_PM_MAX_IDLE_FILTER		(0x7)
 #define ADF_GEN4_PM_DEFAULT_IDLE_SUPPORT	(0x1)
 
+/* PM CSRs fields masks */
+#define ADF_GEN4_PM_DOMAIN_POWER_GATED_MASK	GENMASK(15, 0)
+#define ADF_GEN4_PM_SSM_PM_ENABLE_MASK		GENMASK(15, 0)
+#define ADF_GEN4_PM_IDLE_FILTER_MASK		GENMASK(5, 3)
+#define ADF_GEN4_PM_IDLE_ENABLE_MASK		BIT(2)
+#define ADF_GEN4_PM_ENABLE_PM_MASK		BIT(21)
+#define ADF_GEN4_PM_ENABLE_PM_IDLE_MASK		BIT(22)
+#define ADF_GEN4_PM_ENABLE_DEEP_PM_IDLE_MASK	BIT(23)
+#define ADF_GEN4_PM_CURRENT_WP_MASK		GENMASK(19, 11)
+#define ADF_GEN4_PM_CPM_PM_STATE_MASK		GENMASK(22, 20)
+#define ADF_GEN4_PM_PENDING_WP_MASK		GENMASK(31, 23)
+#define ADF_GEN4_PM_THR_VALUE_MASK		GENMASK(6, 4)
+#define ADF_GEN4_PM_MIN_PWR_ACK_MASK		BIT(7)
+#define ADF_GEN4_PM_MIN_PWR_ACK_PENDING_MASK	BIT(17)
+#define ADF_GEN4_PM_CPR_ACTIVE_COUNT_MASK	BIT(0)
+#define ADF_GEN4_PM_CPR_MANAGED_COUNT_MASK	BIT(0)
+#define ADF_GEN4_PM_XLT_ACTIVE_COUNT_MASK	BIT(1)
+#define ADF_GEN4_PM_XLT_MANAGED_COUNT_MASK	BIT(1)
+#define ADF_GEN4_PM_DCPR_ACTIVE_COUNT_MASK	GENMASK(3, 2)
+#define ADF_GEN4_PM_DCPR_MANAGED_COUNT_MASK	GENMASK(3, 2)
+#define ADF_GEN4_PM_PKE_ACTIVE_COUNT_MASK	GENMASK(8, 4)
+#define ADF_GEN4_PM_PKE_MANAGED_COUNT_MASK	GENMASK(8, 4)
+#define ADF_GEN4_PM_WAT_ACTIVE_COUNT_MASK	GENMASK(13, 9)
+#define ADF_GEN4_PM_WAT_MANAGED_COUNT_MASK	GENMASK(13, 9)
+#define ADF_GEN4_PM_WCP_ACTIVE_COUNT_MASK	GENMASK(18, 14)
+#define ADF_GEN4_PM_WCP_MANAGED_COUNT_MASK	GENMASK(18, 14)
+#define ADF_GEN4_PM_UCS_ACTIVE_COUNT_MASK	GENMASK(20, 19)
+#define ADF_GEN4_PM_UCS_MANAGED_COUNT_MASK	GENMASK(20, 19)
+#define ADF_GEN4_PM_CPH_ACTIVE_COUNT_MASK	GENMASK(24, 21)
+#define ADF_GEN4_PM_CPH_MANAGED_COUNT_MASK	GENMASK(24, 21)
+#define ADF_GEN4_PM_ATH_ACTIVE_COUNT_MASK	GENMASK(28, 25)
+#define ADF_GEN4_PM_ATH_MANAGED_COUNT_MASK	GENMASK(28, 25)
+
 int adf_gen4_enable_pm(struct adf_accel_dev *accel_dev);
 bool adf_gen4_handle_pm_interrupt(struct adf_accel_dev *accel_dev);
 
+#ifdef CONFIG_DEBUG_FS
+void adf_gen4_init_dev_pm_data(struct adf_accel_dev *accel_dev);
+#else
+static inline void adf_gen4_init_dev_pm_data(struct adf_accel_dev *accel_dev)
+{
+}
+#endif /* CONFIG_DEBUG_FS */
+
 #endif

drivers/crypto/intel/qat/qat_common/adf_gen4_pm_debugfs.c

+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Intel Corporation */
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/string_helpers.h>
+#include <linux/stringify.h>
+
+#include "adf_accel_devices.h"
+#include "adf_common_drv.h"
+#include "adf_gen4_pm.h"
+#include "icp_qat_fw_init_admin.h"
+
+/*
+ * This is needed because a variable is used to index the mask at
+ * pm_scnprint_table(), making it not compile time constant, so the compile
+ * asserts from FIELD_GET() or u32_get_bits() won't be fulfilled.
+ */
+#define field_get(_mask, _reg) (((_reg) & (_mask)) >> (ffs(_mask) - 1))
+
+#define PM_INFO_MEMBER_OFF(member)	\
+	(offsetof(struct icp_qat_fw_init_admin_pm_info, member) / sizeof(u32))
+
+#define PM_INFO_REGSET_ENTRY_MASK(_reg_, _field_, _mask_)	\
+{								\
+	.reg_offset = PM_INFO_MEMBER_OFF(_reg_),		\
+	.key = __stringify(_field_),				\
+	.field_mask = _mask_,					\
+}
+
+#define PM_INFO_REGSET_ENTRY32(_reg_, _field_)	\
+	PM_INFO_REGSET_ENTRY_MASK(_reg_, _field_, GENMASK(31, 0))
+
+#define PM_INFO_REGSET_ENTRY(_reg_, _field_)	\
+	PM_INFO_REGSET_ENTRY_MASK(_reg_, _field_, ADF_GEN4_PM_##_field_##_MASK)
+
+#define PM_INFO_MAX_KEY_LEN	21
+
+struct pm_status_row {
+	int reg_offset;
+	u32 field_mask;
+	const char *key;
+};
+
+static struct pm_status_row pm_fuse_rows[] = {
+	PM_INFO_REGSET_ENTRY(fusectl0, ENABLE_PM),
+	PM_INFO_REGSET_ENTRY(fusectl0, ENABLE_PM_IDLE),
+	PM_INFO_REGSET_ENTRY(fusectl0, ENABLE_DEEP_PM_IDLE),
+};
+
+static struct pm_status_row pm_info_rows[] = {
+	PM_INFO_REGSET_ENTRY(pm.status, CPM_PM_STATE),
+	PM_INFO_REGSET_ENTRY(pm.status, PENDING_WP),
+	PM_INFO_REGSET_ENTRY(pm.status, CURRENT_WP),
+	PM_INFO_REGSET_ENTRY(pm.fw_init, IDLE_ENABLE),
+	PM_INFO_REGSET_ENTRY(pm.fw_init, IDLE_FILTER),
+	PM_INFO_REGSET_ENTRY(pm.main, MIN_PWR_ACK),
+	PM_INFO_REGSET_ENTRY(pm.thread, MIN_PWR_ACK_PENDING),
+	PM_INFO_REGSET_ENTRY(pm.main, THR_VALUE),
+};
+
+static struct pm_status_row pm_ssm_rows[] = {
+	PM_INFO_REGSET_ENTRY(ssm.pm_enable, SSM_PM_ENABLE),
+	PM_INFO_REGSET_ENTRY32(ssm.active_constraint, ACTIVE_CONSTRAINT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_domain_status, DOMAIN_POWER_GATED),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, ATH_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, CPH_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, PKE_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, CPR_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, DCPR_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, UCS_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, XLT_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, WAT_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_active_status, WCP_ACTIVE_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, ATH_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, CPH_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, PKE_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, CPR_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, DCPR_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, UCS_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, XLT_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, WAT_MANAGED_COUNT),
+	PM_INFO_REGSET_ENTRY(ssm.pm_managed_status, WCP_MANAGED_COUNT),
+};
+
+static struct pm_status_row pm_log_rows[] = {
+	PM_INFO_REGSET_ENTRY32(event_counters.host_msg, HOST_MSG_EVENT_COUNT),
+	PM_INFO_REGSET_ENTRY32(event_counters.sys_pm, SYS_PM_EVENT_COUNT),
+	PM_INFO_REGSET_ENTRY32(event_counters.local_ssm, SSM_EVENT_COUNT),
+	PM_INFO_REGSET_ENTRY32(event_counters.timer, TIMER_EVENT_COUNT),
+	PM_INFO_REGSET_ENTRY32(event_counters.unknown, UNKNOWN_EVENT_COUNT),
+};
+
+static struct pm_status_row pm_event_rows[ICP_QAT_NUMBER_OF_PM_EVENTS] = {
+	PM_INFO_REGSET_ENTRY32(event_log[0], EVENT0),
+	PM_INFO_REGSET_ENTRY32(event_log[1], EVENT1),
+	PM_INFO_REGSET_ENTRY32(event_log[2], EVENT2),
+	PM_INFO_REGSET_ENTRY32(event_log[3], EVENT3),
+	PM_INFO_REGSET_ENTRY32(event_log[4], EVENT4),
+	PM_INFO_REGSET_ENTRY32(event_log[5], EVENT5),
+	PM_INFO_REGSET_ENTRY32(event_log[6], EVENT6),
+	PM_INFO_REGSET_ENTRY32(event_log[7], EVENT7),
+};
+
+static struct pm_status_row pm_csrs_rows[] = {
+	PM_INFO_REGSET_ENTRY32(pm.fw_init, CPM_PM_FW_INIT),
+	PM_INFO_REGSET_ENTRY32(pm.status, CPM_PM_STATUS),
+	PM_INFO_REGSET_ENTRY32(pm.main, CPM_PM_MASTER_FW),
+	PM_INFO_REGSET_ENTRY32(pm.pwrreq, CPM_PM_PWRREQ),
+};
+
+static int pm_scnprint_table(char *buff, struct pm_status_row *table,
+			     u32 *pm_info_regs, size_t buff_size, int table_len,
+			     bool lowercase)
+{
+	char key[PM_INFO_MAX_KEY_LEN];
+	int wr = 0;
+	int i;
+
+	for (i = 0; i < table_len; i++) {
+		if (lowercase)
+			string_lower(key, table[i].key);
+		else
+			string_upper(key, table[i].key);
+
+		wr += scnprintf(&buff[wr], buff_size - wr, "%s: %#x\n", key,
+				field_get(table[i].field_mask,
+					  pm_info_regs[table[i].reg_offset]));
+	}
+
+	return wr;
+}
+
+static int pm_scnprint_table_upper_keys(char *buff, struct pm_status_row *table,
+					u32 *pm_info_regs, size_t buff_size,
+					int table_len)
+{
+	return pm_scnprint_table(buff, table, pm_info_regs, buff_size,
+				 table_len, false);
+}
+
+static int pm_scnprint_table_lower_keys(char *buff, struct pm_status_row *table,
+					u32 *pm_info_regs, size_t buff_size,
+					int table_len)
+{
+	return pm_scnprint_table(buff, table, pm_info_regs, buff_size,
+				 table_len, true);
+}
+
+static_assert(sizeof(struct icp_qat_fw_init_admin_pm_info) < PAGE_SIZE);
+
+static ssize_t adf_gen4_print_pm_status(struct adf_accel_dev *accel_dev,
+					char __user *buf, size_t count,
+					loff_t *pos)
+{
+	void __iomem *pmisc = adf_get_pmisc_base(accel_dev);
+	struct adf_pm *pm = &accel_dev->power_management;
+	struct icp_qat_fw_init_admin_pm_info *pm_info;
+	dma_addr_t p_state_addr;
+	u32 *pm_info_regs;
+	char *pm_kv;
+	int len = 0;
+	u32 val;
+	int ret;
+
+	pm_info = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!pm_info)
+		return -ENOMEM;
+
+	pm_kv = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!pm_kv) {
+		ret = -ENOMEM;
+		goto out_free;
+	}
+
+	p_state_addr = dma_map_single(&GET_DEV(accel_dev), pm_info, PAGE_SIZE,
+				      DMA_FROM_DEVICE);
+	ret = dma_mapping_error(&GET_DEV(accel_dev), p_state_addr);
+	if (ret)
+		goto out_free;
+
+	/* Query PM info from QAT FW */
+	ret = adf_get_pm_info(accel_dev, p_state_addr, PAGE_SIZE);
+	dma_unmap_single(&GET_DEV(accel_dev), p_state_addr, PAGE_SIZE,
+			 DMA_FROM_DEVICE);
+	if (ret)
+		goto out_free;
+
+	pm_info_regs = (u32 *)pm_info;
+
+	/* Fusectl related */
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "----------- PM Fuse info ---------\n");
+	len += pm_scnprint_table_lower_keys(&pm_kv[len], pm_fuse_rows,
+					    pm_info_regs, PAGE_SIZE - len,
+					    ARRAY_SIZE(pm_fuse_rows));
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "max_pwrreq: %#x\n",
+			 pm_info->max_pwrreq);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "min_pwrreq: %#x\n",
+			 pm_info->min_pwrreq);
+
+	/* PM related */
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "------------  PM Info ------------\n");
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "power_level: %s\n",
+			 pm_info->pwr_state == PM_SET_MIN ? "min" : "max");
+	len += pm_scnprint_table_lower_keys(&pm_kv[len], pm_info_rows,
+					    pm_info_regs, PAGE_SIZE - len,
+					    ARRAY_SIZE(pm_info_rows));
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "pm_mode: STATIC\n");
+
+	/* SSM related */
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "----------- SSM_PM Info ----------\n");
+	len += pm_scnprint_table_lower_keys(&pm_kv[len], pm_ssm_rows,
+					    pm_info_regs, PAGE_SIZE - len,
+					    ARRAY_SIZE(pm_ssm_rows));
+
+	/* Log related */
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "------------- PM Log -------------\n");
+	len += pm_scnprint_table_lower_keys(&pm_kv[len], pm_log_rows,
+					    pm_info_regs, PAGE_SIZE - len,
+					    ARRAY_SIZE(pm_log_rows));
+
+	len += pm_scnprint_table_lower_keys(&pm_kv[len], pm_event_rows,
+					    pm_info_regs, PAGE_SIZE - len,
+					    ARRAY_SIZE(pm_event_rows));
+
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "idle_irq_count: %#x\n",
+			 pm->idle_irq_counters);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "fw_irq_count: %#x\n",
+			 pm->fw_irq_counters);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "throttle_irq_count: %#x\n", pm->throttle_irq_counters);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "host_ack_count: %#x\n",
+			 pm->host_ack_counter);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len, "host_nack_count: %#x\n",
+			 pm->host_nack_counter);
+
+	/* CSRs content */
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "----------- HW PM CSRs -----------\n");
+	len += pm_scnprint_table_upper_keys(&pm_kv[len], pm_csrs_rows,
+					    pm_info_regs, PAGE_SIZE - len,
+					    ARRAY_SIZE(pm_csrs_rows));
+
+	val = ADF_CSR_RD(pmisc, ADF_GEN4_PM_HOST_MSG);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "CPM_PM_HOST_MSG: %#x\n", val);
+	val = ADF_CSR_RD(pmisc, ADF_GEN4_PM_INTERRUPT);
+	len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+			 "CPM_PM_INTERRUPT: %#x\n", val);
+	ret = simple_read_from_buffer(buf, count, pos, pm_kv, len);
+
+out_free:
+	kfree(pm_info);
+	kfree(pm_kv);
+	return ret;
+}
+
+void adf_gen4_init_dev_pm_data(struct adf_accel_dev *accel_dev)
+{
+	accel_dev->power_management.print_pm_status = adf_gen4_print_pm_status;
+	accel_dev->power_management.present = true;
+}

drivers/crypto/intel/qat/qat_common/adf_pm_dbgfs.c

+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Intel Corporation */
+#include <linux/debugfs.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+
+#include "adf_accel_devices.h"
+#include "adf_pm_dbgfs.h"
+
+static ssize_t pm_status_read(struct file *f, char __user *buf, size_t count,
+			      loff_t *pos)
+{
+	struct adf_accel_dev *accel_dev = file_inode(f)->i_private;
+	struct adf_pm pm = accel_dev->power_management;
+
+	if (pm.print_pm_status)
+		return pm.print_pm_status(accel_dev, buf, count, pos);
+
+	return count;
+}
+
+static const struct file_operations pm_status_fops = {
+	.owner = THIS_MODULE,
+	.read = pm_status_read,
+};
+
+void adf_pm_dbgfs_add(struct adf_accel_dev *accel_dev)
+{
+	struct adf_pm *pm = &accel_dev->power_management;
+
+	if (!pm->present || !pm->print_pm_status)
+		return;
+
+	pm->debugfs_pm_status = debugfs_create_file("pm_status", 0400,
+						    accel_dev->debugfs_dir,
+						    accel_dev, &pm_status_fops);
+}
+
+void adf_pm_dbgfs_rm(struct adf_accel_dev *accel_dev)
+{
+	struct adf_pm *pm = &accel_dev->power_management;
+
+	if (!pm->present)
+		return;
+
+	debugfs_remove(pm->debugfs_pm_status);
+	pm->debugfs_pm_status = NULL;
+}

drivers/crypto/intel/qat/qat_common/adf_pm_dbgfs.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2023 Intel Corporation */
+
+#ifndef ADF_PM_DBGFS_H_
+#define ADF_PM_DBGFS_H_
+
+struct adf_accel_dev;
+
+void adf_pm_dbgfs_rm(struct adf_accel_dev *accel_dev);
+void adf_pm_dbgfs_add(struct adf_accel_dev *accel_dev);
+
+#endif /* ADF_PM_DBGFS_H_ */

drivers/crypto/intel/qat/qat_common/icp_qat_fw_init_admin.h

@@ -20,6 +20,7 @@ enum icp_qat_fw_init_admin_cmd_id {
 	ICP_QAT_FW_HEARTBEAT_TIMER_SET = 13,
 	ICP_QAT_FW_TIMER_GET = 19,
 	ICP_QAT_FW_PM_STATE_CONFIG = 128,
+	ICP_QAT_FW_PM_INFO = 129,
 };
 
 enum icp_qat_fw_init_admin_resp_status {
@@ -108,4 +109,38 @@ struct icp_qat_fw_init_admin_resp {
 
 #define ICP_QAT_FW_SYNC ICP_QAT_FW_HEARTBEAT_SYNC
 
+#define ICP_QAT_NUMBER_OF_PM_EVENTS 8
+
+struct icp_qat_fw_init_admin_pm_info {
+	__u16 max_pwrreq;
+	__u16 min_pwrreq;
+	__u16 resvrd1;
+	__u8 pwr_state;
+	__u8 resvrd2;
+	__u32 fusectl0;
+	struct_group(event_counters,
+		__u32 sys_pm;
+		__u32 host_msg;
+		__u32 unknown;
+		__u32 local_ssm;
+		__u32 timer;
+	);
+	__u32 event_log[ICP_QAT_NUMBER_OF_PM_EVENTS];
+	struct_group(pm,
+		__u32 fw_init;
+		__u32 pwrreq;
+		__u32 status;
+		__u32 main;
+		__u32 thread;
+	);
+	struct_group(ssm,
+		__u32 pm_enable;
+		__u32 pm_active_status;
+		__u32 pm_managed_status;
+		__u32 pm_domain_status;
+		__u32 active_constraint;
+	);
+	__u32 resvrd3[6];
+};
+
 #endif