crypto: qat - enable power management for QAT GEN4

Add support for HW QAT Power Management (PM) feature.
This feature is enabled at init time (1) by sending an admin message to
the firmware, targeting the admin AE, that sets the idle time before
the device changes state and (2) by unmasking the PM source of interrupt
in ERRMSK2.

The interrupt handler is extended to handle a PM interrupt which
is triggered by HW when a PM transition occurs. In this case, the
driver responds acknowledging the transaction using the HOST_MSG
mailbox.

Signed-off-by: Wojciech Ziemba <wojciech.ziemba@intel.com>
Co-developed-by: Marcinx Malinowski <marcinx.malinowski@intel.com>
Signed-off-by: Marcinx Malinowski <marcinx.malinowski@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Marco Chiappero <marco.chiappero@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c b/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c
index 69fb271..fb5970a 100644 (file)
--- a/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c
+++ b/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c
@@ -6,6 +6,7 @@
 #include <adf_common_drv.h>
 #include <adf_gen4_hw_data.h>
 #include <adf_gen4_pfvf.h>
+#include <adf_gen4_pm.h>
 #include "adf_4xxx_hw_data.h"
 #include "icp_qat_hw.h"
 
@@ -257,18 +258,18 @@ static int adf_init_device(struct adf_accel_dev *accel_dev)
 
        /* Temporarily mask PM interrupt */
        csr = ADF_CSR_RD(addr, ADF_GEN4_ERRMSK2);
-       csr |= ADF_4XXX_PM_SOU;
+       csr |= ADF_GEN4_PM_SOU;
        ADF_CSR_WR(addr, ADF_GEN4_ERRMSK2, csr);
 
        /* Set DRV_ACTIVE bit to power up the device */
-       ADF_CSR_WR(addr, ADF_4XXX_PM_INTERRUPT, ADF_4XXX_PM_DRV_ACTIVE);
+       ADF_CSR_WR(addr, ADF_GEN4_PM_INTERRUPT, ADF_GEN4_PM_DRV_ACTIVE);
 
        /* Poll status register to make sure the device is powered up */
        ret = read_poll_timeout(ADF_CSR_RD, status,
-                               status & ADF_4XXX_PM_INIT_STATE,
-                               ADF_4XXX_PM_POLL_DELAY_US,
-                               ADF_4XXX_PM_POLL_TIMEOUT_US, true, addr,
-                               ADF_4XXX_PM_STATUS);
+                               status & ADF_GEN4_PM_INIT_STATE,
+                               ADF_GEN4_PM_POLL_DELAY_US,
+                               ADF_GEN4_PM_POLL_TIMEOUT_US, true, addr,
+                               ADF_GEN4_PM_STATUS);
        if (ret)
                dev_err(&GET_DEV(accel_dev), "Failed to power up the device\n");
 
@@ -354,6 +355,8 @@ void adf_init_hw_data_4xxx(struct adf_hw_device_data *hw_data)
        hw_data->set_ssm_wdtimer = adf_gen4_set_ssm_wdtimer;
        hw_data->disable_iov = adf_disable_sriov;
        hw_data->ring_pair_reset = adf_gen4_ring_pair_reset;
+       hw_data->enable_pm = adf_gen4_enable_pm;
+       hw_data->handle_pm_interrupt = adf_gen4_handle_pm_interrupt;
 
        adf_gen4_init_hw_csr_ops(&hw_data->csr_ops);
        adf_gen4_init_pf_pfvf_ops(&hw_data->pfvf_ops);

diff --git a/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.h b/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.h
index 857b93a..1034752 100644 (file)
--- a/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.h
+++ b/drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.h
@@ -49,16 +49,6 @@
 #define ADF_4XXX_ADMINMSGLR_OFFSET     (0x500578)
 #define ADF_4XXX_MAILBOX_BASE_OFFSET   (0x600970)
 
-/* Power management */
-#define ADF_4XXX_PM_POLL_DELAY_US      20
-#define ADF_4XXX_PM_POLL_TIMEOUT_US    USEC_PER_SEC
-#define ADF_4XXX_PM_STATUS             (0x50A00C)
-#define ADF_4XXX_PM_INTERRUPT          (0x50A028)
-#define ADF_4XXX_PM_DRV_ACTIVE         BIT(20)
-#define ADF_4XXX_PM_INIT_STATE         BIT(21)
-/* Power management source in ERRSOU2 and ERRMSK2 */
-#define ADF_4XXX_PM_SOU                        BIT(18)
-
 /* Firmware Binaries */
 #define ADF_4XXX_FW            "qat_4xxx.bin"
 #define ADF_4XXX_MMP           "qat_4xxx_mmp.bin"

diff --git a/drivers/crypto/qat/qat_common/Makefile b/drivers/crypto/qat/qat_common/Makefile
index 7e191a4..f25a6c8 100644 (file)
--- a/drivers/crypto/qat/qat_common/Makefile
+++ b/drivers/crypto/qat/qat_common/Makefile
@@ -12,6 +12,7 @@ intel_qat-objs := adf_cfg.o \
        adf_hw_arbiter.o \
        adf_gen2_hw_data.o \
        adf_gen4_hw_data.o \
+       adf_gen4_pm.o \
        qat_crypto.o \
        qat_algs.o \
        qat_asym_algs.o \

diff --git a/drivers/crypto/qat/qat_common/adf_accel_devices.h b/drivers/crypto/qat/qat_common/adf_accel_devices.h
index 2d4cd7c..a03c6cf 100644 (file)
--- a/drivers/crypto/qat/qat_common/adf_accel_devices.h
+++ b/drivers/crypto/qat/qat_common/adf_accel_devices.h
@@ -184,6 +184,8 @@ struct adf_hw_device_data {
        void (*exit_arb)(struct adf_accel_dev *accel_dev);
        const u32 *(*get_arb_mapping)(void);
        int (*init_device)(struct adf_accel_dev *accel_dev);
+       int (*enable_pm)(struct adf_accel_dev *accel_dev);
+       bool (*handle_pm_interrupt)(struct adf_accel_dev *accel_dev);
        void (*disable_iov)(struct adf_accel_dev *accel_dev);
        void (*configure_iov_threads)(struct adf_accel_dev *accel_dev,
                                      bool enable);

diff --git a/drivers/crypto/qat/qat_common/adf_admin.c b/drivers/crypto/qat/qat_common/adf_admin.c
index 498eb6f..3b6184c 100644 (file)
--- a/drivers/crypto/qat/qat_common/adf_admin.c
+++ b/drivers/crypto/qat/qat_common/adf_admin.c
@@ -251,6 +251,43 @@ int adf_send_admin_init(struct adf_accel_dev *accel_dev)
 }
 EXPORT_SYMBOL_GPL(adf_send_admin_init);
 
+/**
+ * adf_init_admin_pm() - Function sends PM init message to FW
+ * @accel_dev: Pointer to acceleration device.
+ * @idle_delay: QAT HW idle time before power gating is initiated.
+ *             000 - 64us
+ *             001 - 128us
+ *             010 - 256us
+ *             011 - 512us
+ *             100 - 1ms
+ *             101 - 2ms
+ *             110 - 4ms
+ *             111 - 8ms
+ *
+ * Function sends to the FW the admin init message for the PM state
+ * configuration.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_init_admin_pm(struct adf_accel_dev *accel_dev, u32 idle_delay)
+{
+       struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+       struct icp_qat_fw_init_admin_resp resp = {0};
+       struct icp_qat_fw_init_admin_req req = {0};
+       u32 ae_mask = hw_data->admin_ae_mask;
+
+       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_STATE_CONFIG;
+       req.idle_filter = idle_delay;
+
+       return adf_send_admin(accel_dev, &req, &resp, ae_mask);
+}
+EXPORT_SYMBOL_GPL(adf_init_admin_pm);
+
 int adf_init_admin_comms(struct adf_accel_dev *accel_dev)
 {
        struct adf_admin_comms *admin;

diff --git a/drivers/crypto/qat/qat_common/adf_common_drv.h b/drivers/crypto/qat/qat_common/adf_common_drv.h
index 0775491..e8c9b77 100644 (file)
--- a/drivers/crypto/qat/qat_common/adf_common_drv.h
+++ b/drivers/crypto/qat/qat_common/adf_common_drv.h
@@ -102,6 +102,7 @@ void adf_exit_aer(void);
 int adf_init_admin_comms(struct adf_accel_dev *accel_dev);
 void adf_exit_admin_comms(struct adf_accel_dev *accel_dev);
 int adf_send_admin_init(struct adf_accel_dev *accel_dev);
+int adf_init_admin_pm(struct adf_accel_dev *accel_dev, u32 idle_delay);
 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);

diff --git a/drivers/crypto/qat/qat_common/adf_gen4_pm.c b/drivers/crypto/qat/qat_common/adf_gen4_pm.c
new file mode 100644 (file)
index 0000000..7037c08
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_gen4_pm.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2022 Intel Corporation */
+#include <linux/bitfield.h>
+#include <linux/iopoll.h>
+#include "adf_accel_devices.h"
+#include "adf_common_drv.h"
+#include "adf_gen4_pm.h"
+#include "adf_cfg_strings.h"
+#include "icp_qat_fw_init_admin.h"
+#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;
+       u32 pm_int_sts;
+};
+
+static int send_host_msg(struct adf_accel_dev *accel_dev)
+{
+       void __iomem *pmisc = adf_get_pmisc_base(accel_dev);
+       u32 msg;
+
+       msg = ADF_CSR_RD(pmisc, ADF_GEN4_PM_HOST_MSG);
+       if (msg & ADF_GEN4_PM_MSG_PENDING)
+               return -EBUSY;
+
+       /* Send HOST_MSG */
+       msg = FIELD_PREP(ADF_GEN4_PM_MSG_PAYLOAD_BIT_MASK, PM_SET_MIN);
+       msg |= ADF_GEN4_PM_MSG_PENDING;
+       ADF_CSR_WR(pmisc, ADF_GEN4_PM_HOST_MSG, msg);
+
+       /* Poll status register to make sure the HOST_MSG has been processed */
+       return read_poll_timeout(ADF_CSR_RD, msg,
+                               !(msg & ADF_GEN4_PM_MSG_PENDING),
+                               ADF_GEN4_PM_MSG_POLL_DELAY_US,
+                               ADF_GEN4_PM_POLL_TIMEOUT_US, true, pmisc,
+                               ADF_GEN4_PM_HOST_MSG);
+}
+
+static void pm_bh_handler(struct work_struct *work)
+{
+       struct adf_gen4_pm_data *pm_data =
+               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);
+       u32 pm_int_sts = pm_data->pm_int_sts;
+       u32 val;
+
+       /* PM Idle interrupt */
+       if (pm_int_sts & ADF_GEN4_PM_IDLE_STS) {
+               /* 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");
+       }
+
+       /* Clear interrupt status */
+       ADF_CSR_WR(pmisc, ADF_GEN4_PM_INTERRUPT, pm_int_sts);
+
+       /* Reenable PM interrupt */
+       val = ADF_CSR_RD(pmisc, ADF_GEN4_ERRMSK2);
+       val &= ~ADF_GEN4_PM_SOU;
+       ADF_CSR_WR(pmisc, ADF_GEN4_ERRMSK2, val);
+
+       kfree(pm_data);
+}
+
+bool adf_gen4_handle_pm_interrupt(struct adf_accel_dev *accel_dev)
+{
+       void __iomem *pmisc = adf_get_pmisc_base(accel_dev);
+       struct adf_gen4_pm_data *pm_data = NULL;
+       u32 errsou2;
+       u32 errmsk2;
+       u32 val;
+
+       /* Only handle the interrupt triggered by PM */
+       errmsk2 = ADF_CSR_RD(pmisc, ADF_GEN4_ERRMSK2);
+       if (errmsk2 & ADF_GEN4_PM_SOU)
+               return false;
+
+       errsou2 = ADF_CSR_RD(pmisc, ADF_GEN4_ERRSOU2);
+       if (!(errsou2 & ADF_GEN4_PM_SOU))
+               return false;
+
+       /* Disable interrupt */
+       val = ADF_CSR_RD(pmisc, ADF_GEN4_ERRMSK2);
+       val |= ADF_GEN4_PM_SOU;
+       ADF_CSR_WR(pmisc, ADF_GEN4_ERRMSK2, val);
+
+       val = ADF_CSR_RD(pmisc, ADF_GEN4_PM_INTERRUPT);
+
+       pm_data = kzalloc(sizeof(*pm_data), GFP_ATOMIC);
+       if (!pm_data)
+               return false;
+
+       pm_data->pm_int_sts = val;
+       pm_data->accel_dev = accel_dev;
+
+       INIT_WORK(&pm_data->pm_irq_work, pm_bh_handler);
+       adf_misc_wq_queue_work(&pm_data->pm_irq_work);
+
+       return true;
+}
+EXPORT_SYMBOL_GPL(adf_gen4_handle_pm_interrupt);
+
+int adf_gen4_enable_pm(struct adf_accel_dev *accel_dev)
+{
+       void __iomem *pmisc = adf_get_pmisc_base(accel_dev);
+       int ret;
+       u32 val;
+
+       ret = adf_init_admin_pm(accel_dev, ADF_GEN4_PM_DEFAULT_IDLE_FILTER);
+       if (ret)
+               return ret;
+
+       /* Enable default PM interrupts: IDLE, THROTTLE */
+       val = ADF_CSR_RD(pmisc, ADF_GEN4_PM_INTERRUPT);
+       val |= ADF_GEN4_PM_INT_EN_DEFAULT;
+
+       /* Clear interrupt status */
+       val |= ADF_GEN4_PM_INT_STS_MASK;
+       ADF_CSR_WR(pmisc, ADF_GEN4_PM_INTERRUPT, val);
+
+       /* Unmask PM Interrupt */
+       val = ADF_CSR_RD(pmisc, ADF_GEN4_ERRMSK2);
+       val &= ~ADF_GEN4_PM_SOU;
+       ADF_CSR_WR(pmisc, ADF_GEN4_ERRMSK2, val);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(adf_gen4_enable_pm);

diff --git a/drivers/crypto/qat/qat_common/adf_gen4_pm.h b/drivers/crypto/qat/qat_common/adf_gen4_pm.h
new file mode 100644 (file)
index 0000000..f8f8a9e
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_gen4_pm.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) */
+/* Copyright(c) 2022 Intel Corporation */
+#ifndef ADF_GEN4_PM_H
+#define ADF_GEN4_PM_H
+
+#include "adf_accel_devices.h"
+
+/* Power management registers */
+#define ADF_GEN4_PM_HOST_MSG (0x50A01C)
+
+/* Power management */
+#define ADF_GEN4_PM_POLL_DELAY_US      20
+#define ADF_GEN4_PM_POLL_TIMEOUT_US    USEC_PER_SEC
+#define ADF_GEN4_PM_MSG_POLL_DELAY_US  (10 * USEC_PER_MSEC)
+#define ADF_GEN4_PM_STATUS             (0x50A00C)
+#define ADF_GEN4_PM_INTERRUPT          (0x50A028)
+
+/* Power management source in ERRSOU2 and ERRMSK2 */
+#define ADF_GEN4_PM_SOU                        BIT(18)
+
+#define ADF_GEN4_PM_IDLE_INT_EN                BIT(18)
+#define ADF_GEN4_PM_THROTTLE_INT_EN    BIT(19)
+#define ADF_GEN4_PM_DRV_ACTIVE         BIT(20)
+#define ADF_GEN4_PM_INIT_STATE         BIT(21)
+#define ADF_GEN4_PM_INT_EN_DEFAULT     (ADF_GEN4_PM_IDLE_INT_EN | \
+                                       ADF_GEN4_PM_THROTTLE_INT_EN)
+
+#define ADF_GEN4_PM_THR_STS    BIT(0)
+#define ADF_GEN4_PM_IDLE_STS   BIT(1)
+#define ADF_GEN4_PM_FW_INT_STS BIT(2)
+#define ADF_GEN4_PM_INT_STS_MASK (ADF_GEN4_PM_THR_STS | \
+                                ADF_GEN4_PM_IDLE_STS | \
+                                ADF_GEN4_PM_FW_INT_STS)
+
+#define ADF_GEN4_PM_MSG_PENDING                        BIT(0)
+#define ADF_GEN4_PM_MSG_PAYLOAD_BIT_MASK       GENMASK(28, 1)
+
+#define ADF_GEN4_PM_DEFAULT_IDLE_FILTER                (0x0)
+#define ADF_GEN4_PM_MAX_IDLE_FILTER            (0x7)
+
+int adf_gen4_enable_pm(struct adf_accel_dev *accel_dev);
+bool adf_gen4_handle_pm_interrupt(struct adf_accel_dev *accel_dev);
+
+#endif

diff --git a/drivers/crypto/qat/qat_common/adf_init.c b/drivers/crypto/qat/qat_common/adf_init.c
index 2edc63c..c2c718f 100644 (file)
--- a/drivers/crypto/qat/qat_common/adf_init.c
+++ b/drivers/crypto/qat/qat_common/adf_init.c
@@ -181,6 +181,12 @@ int adf_dev_start(struct adf_accel_dev *accel_dev)
        if (hw_data->set_ssm_wdtimer)
                hw_data->set_ssm_wdtimer(accel_dev);
 
+       /* Enable Power Management */
+       if (hw_data->enable_pm && hw_data->enable_pm(accel_dev)) {
+               dev_err(&GET_DEV(accel_dev), "Failed to configure Power Management\n");
+               return -EFAULT;
+       }
+
        list_for_each(list_itr, &service_table) {
                service = list_entry(list_itr, struct service_hndl, list);
                if (service->event_hld(accel_dev, ADF_EVENT_START)) {

diff --git a/drivers/crypto/qat/qat_common/adf_isr.c b/drivers/crypto/qat/qat_common/adf_isr.c
index 803b89b..a35149f 100644 (file)
--- a/drivers/crypto/qat/qat_common/adf_isr.c
+++ b/drivers/crypto/qat/qat_common/adf_isr.c
@@ -124,6 +124,17 @@ static bool adf_handle_vf2pf_int(struct adf_accel_dev *accel_dev)
 }
 #endif /* CONFIG_PCI_IOV */
 
+static bool adf_handle_pm_int(struct adf_accel_dev *accel_dev)
+{
+       struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+
+       if (hw_data->handle_pm_interrupt &&
+           hw_data->handle_pm_interrupt(accel_dev))
+               return true;
+
+       return false;
+}
+
 static irqreturn_t adf_msix_isr_ae(int irq, void *dev_ptr)
 {
        struct adf_accel_dev *accel_dev = dev_ptr;
@@ -134,6 +145,9 @@ static irqreturn_t adf_msix_isr_ae(int irq, void *dev_ptr)
                return IRQ_HANDLED;
 #endif /* CONFIG_PCI_IOV */
 
+       if (adf_handle_pm_int(accel_dev))
+               return IRQ_HANDLED;
+
        dev_dbg(&GET_DEV(accel_dev), "qat_dev%d spurious AE interrupt\n",
                accel_dev->accel_id);
 

diff --git a/drivers/crypto/qat/qat_common/icp_qat_fw_init_admin.h b/drivers/crypto/qat/qat_common/icp_qat_fw_init_admin.h
index afe59a7..56cb827 100644 (file)
--- a/drivers/crypto/qat/qat_common/icp_qat_fw_init_admin.h
+++ b/drivers/crypto/qat/qat_common/icp_qat_fw_init_admin.h
@@ -16,6 +16,7 @@ enum icp_qat_fw_init_admin_cmd_id {
        ICP_QAT_FW_HEARTBEAT_SYNC = 7,
        ICP_QAT_FW_HEARTBEAT_GET = 8,
        ICP_QAT_FW_COMP_CAPABILITY_GET = 9,
+       ICP_QAT_FW_PM_STATE_CONFIG = 128,
 };
 
 enum icp_qat_fw_init_admin_resp_status {