From: George Abraham P <george.abraham.p@xxxxxxxxx>
The QAT driver includes infrastructure to report power management (PM)
information via debugfs. Extend this support to QAT GEN6 devices
by exposing PM debug data through the `pm_status` file.
This implementation reports the current PM state, power management
hardware control and status registers (CSR), and per-domain power
status specific to the QAT GEN6 architecture.
The debug functionality is implemented in adf_gen6_pm_dbgfs.c
and initialized as part of the enable_pm() function.
Co-developed-by: Vijay Sundar Selvamani <vijay.sundar.selvamani@xxxxxxxxx>
Signed-off-by: Vijay Sundar Selvamani <vijay.sundar.selvamani@xxxxxxxxx>
Signed-off-by: George Abraham P <george.abraham.p@xxxxxxxxx>
Signed-off-by: Suman Kumar Chakraborty <suman.kumar.chakraborty@xxxxxxxxx>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
---
Documentation/ABI/testing/debugfs-driver-qat | 2 +-
.../intel/qat/qat_6xxx/adf_6xxx_hw_data.c | 11 +-
drivers/crypto/intel/qat/qat_common/Makefile | 1 +
.../crypto/intel/qat/qat_common/adf_gen6_pm.h | 24 ++++
.../intel/qat/qat_common/adf_gen6_pm_dbgfs.c | 124 ++++++++++++++++++
5 files changed, 160 insertions(+), 2 deletions(-)
create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen6_pm_dbgfs.c
diff --git a/Documentation/ABI/testing/debugfs-driver-qat b/Documentation/ABI/testing/debugfs-driver-qat
index bd6793760f29..3f1efbbad6ca 100644
--- a/Documentation/ABI/testing/debugfs-driver-qat
+++ b/Documentation/ABI/testing/debugfs-driver-qat
@@ -67,7 +67,7 @@ Contact: qat-linux@xxxxxxxxx
Description: (RO) Read returns power management information specific to the
QAT device.
- This attribute is only available for qat_4xxx devices.
+ This attribute is only available for qat_4xxx and qat_6xxx devices.
What: /sys/kernel/debug/qat_<device>_<BDF>/cnv_errors
Date: January 2024
diff --git a/drivers/crypto/intel/qat/qat_6xxx/adf_6xxx_hw_data.c b/drivers/crypto/intel/qat/qat_6xxx/adf_6xxx_hw_data.c
index a21a10a8338f..ecef3dc28a91 100644
--- a/drivers/crypto/intel/qat/qat_6xxx/adf_6xxx_hw_data.c
+++ b/drivers/crypto/intel/qat/qat_6xxx/adf_6xxx_hw_data.c
@@ -763,7 +763,16 @@ static int adf_init_device(struct adf_accel_dev *accel_dev)
static int enable_pm(struct adf_accel_dev *accel_dev)
{
- return adf_init_admin_pm(accel_dev, ADF_GEN6_PM_DEFAULT_IDLE_FILTER);
+ int ret;
+
+ ret = adf_init_admin_pm(accel_dev, ADF_GEN6_PM_DEFAULT_IDLE_FILTER);
+ if (ret)
+ return ret;
+
+ /* Initialize PM internal data */
+ adf_gen6_init_dev_pm_data(accel_dev);
+
+ return 0;
}
static int dev_config(struct adf_accel_dev *accel_dev)
diff --git a/drivers/crypto/intel/qat/qat_common/Makefile b/drivers/crypto/intel/qat/qat_common/Makefile
index 5826180c2051..34019d8637a5 100644
--- a/drivers/crypto/intel/qat/qat_common/Makefile
+++ b/drivers/crypto/intel/qat/qat_common/Makefile
@@ -49,6 +49,7 @@ intel_qat-$(CONFIG_DEBUG_FS) += adf_cnv_dbgfs.o \
adf_fw_counters.o \
adf_gen4_pm_debugfs.o \
adf_gen4_tl.o \
+ adf_gen6_pm_dbgfs.o \
adf_heartbeat_dbgfs.o \
adf_heartbeat.o \
adf_pm_dbgfs.o \
diff --git a/drivers/crypto/intel/qat/qat_common/adf_gen6_pm.h b/drivers/crypto/intel/qat/qat_common/adf_gen6_pm.h
index 9a5b995f7ada..4c0d576e8c21 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_gen6_pm.h
+++ b/drivers/crypto/intel/qat/qat_common/adf_gen6_pm.h
@@ -24,5 +24,29 @@ struct adf_accel_dev;
/* cpm_pm_status bitfields */
#define ADF_GEN6_PM_INIT_STATE BIT(21)
+#define ADF_GEN6_PM_CPM_PM_STATE_MASK GENMASK(22, 20)
+
+/* fusectl0 bitfields */
+#define ADF_GEN6_PM_ENABLE_PM_MASK BIT(21)
+#define ADF_GEN6_PM_ENABLE_PM_IDLE_MASK BIT(22)
+#define ADF_GEN6_PM_ENABLE_DEEP_PM_IDLE_MASK BIT(23)
+
+/* cpm_pm_fw_init bitfields */
+#define ADF_GEN6_PM_IDLE_FILTER_MASK GENMASK(5, 3)
+#define ADF_GEN6_PM_IDLE_ENABLE_MASK BIT(2)
+
+/* ssm_pm_enable bitfield */
+#define ADF_GEN6_PM_SSM_PM_ENABLE_MASK BIT(0)
+
+/* ssm_pm_domain_status bitfield */
+#define ADF_GEN6_PM_DOMAIN_POWERED_UP_MASK BIT(0)
+
+#ifdef CONFIG_DEBUG_FS
+void adf_gen6_init_dev_pm_data(struct adf_accel_dev *accel_dev);
+#else
+static inline void adf_gen6_init_dev_pm_data(struct adf_accel_dev *accel_dev)
+{
+}
+#endif /* CONFIG_DEBUG_FS */
#endif /* ADF_GEN6_PM_H */
diff --git a/drivers/crypto/intel/qat/qat_common/adf_gen6_pm_dbgfs.c b/drivers/crypto/intel/qat/qat_common/adf_gen6_pm_dbgfs.c
new file mode 100644
index 000000000000..603aefba0fdb
--- /dev/null
+++ b/drivers/crypto/intel/qat/qat_common/adf_gen6_pm_dbgfs.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2025 Intel Corporation */
+#include <linux/dma-mapping.h>
+#include <linux/export.h>
+#include <linux/string_helpers.h>
+
+#include "adf_admin.h"
+#include "adf_common_drv.h"
+#include "adf_gen6_pm.h"
+#include "adf_pm_dbgfs_utils.h"
+#include "icp_qat_fw_init_admin.h"
+
+#define PM_INFO_REGSET_ENTRY(_reg_, _field_) \
+ PM_INFO_REGSET_ENTRY_MASK(_reg_, _field_, ADF_GEN6_PM_##_field_##_MASK)
+
+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.fw_init, IDLE_ENABLE),
+ PM_INFO_REGSET_ENTRY(pm.fw_init, IDLE_FILTER),
+};
+
+static struct pm_status_row pm_ssm_rows[] = {
+ PM_INFO_REGSET_ENTRY(ssm.pm_enable, SSM_PM_ENABLE),
+ PM_INFO_REGSET_ENTRY(ssm.pm_domain_status, DOMAIN_POWERED_UP),
+};
+
+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),
+};
+
+static_assert(sizeof(struct icp_qat_fw_init_admin_pm_info) < PAGE_SIZE);
+
+static ssize_t adf_gen6_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 icp_qat_fw_init_admin_pm_info *pm_info;
+ dma_addr_t p_state_addr;
+ u32 *pm_info_regs;
+ size_t len = 0;
+ char *pm_kv;
+ u32 val;
+ int ret;
+
+ pm_info = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!pm_info)
+ return -ENOMEM;
+
+ pm_kv = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!pm_kv) {
+ kfree(pm_info);
+ return -ENOMEM;
+ }
+
+ 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 power management information 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;
+
+ /* Fuse control register */
+ len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+ "----------- PM Fuse info ---------\n");
+ len += adf_pm_scnprint_table_lower_keys(&pm_kv[len], pm_fuse_rows,
+ pm_info_regs, PAGE_SIZE - len,
+ ARRAY_SIZE(pm_fuse_rows));
+
+ /* Power management */
+ len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+ "----------- PM Info --------------\n");
+
+ len += adf_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: ACTIVE\n");
+
+ /* Shared Slice Module */
+ len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+ "----------- SSM_PM Info ----------\n");
+ len += adf_pm_scnprint_table_lower_keys(&pm_kv[len], pm_ssm_rows,
+ pm_info_regs, PAGE_SIZE - len,
+ ARRAY_SIZE(pm_ssm_rows));
+
+ /* Control status register content */
+ len += scnprintf(&pm_kv[len], PAGE_SIZE - len,
+ "----------- HW PM CSRs -----------\n");
+ len += adf_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_GEN6_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_gen6_init_dev_pm_data(struct adf_accel_dev *accel_dev)
+{
+ accel_dev->power_management.print_pm_status = adf_gen6_print_pm_status;
+ accel_dev->power_management.present = true;
+}
+EXPORT_SYMBOL_GPL(adf_gen6_init_dev_pm_data);
--
2.40.1
