crypto: hisilicon - support runtime PM for accelerator device

Add runtime PM support for Kunpeng930 accelerator device.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 30 insertions, 6 deletions

diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
index 55ef3ae70fdb..0ad1ebe4c7ef 100644
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <linux/pm_runtime.h>
 #include <linux/seq_file.h>
 #include <linux/topology.h>
 #include <linux/uacce.h>
@@ -584,9 +585,14 @@ static ssize_t sec_debug_read(struct file *filp, char __user *buf,
 {
 	struct sec_debug_file *file = filp->private_data;
 	char tbuf[SEC_DBGFS_VAL_MAX_LEN];
+	struct hisi_qm *qm = file->qm;
 	u32 val;
 	int ret;
 
+	ret = hisi_qm_get_dfx_access(qm);
+	if (ret)
+		return ret;
+
 	spin_lock_irq(&file->lock);
 
 	switch (file->index) {
@@ -594,14 +600,19 @@ static ssize_t sec_debug_read(struct file *filp, char __user *buf,
 		val = sec_clear_enable_read(file);
 		break;
 	default:
-		spin_unlock_irq(&file->lock);
-		return -EINVAL;
+		goto err_input;
 	}
 
 	spin_unlock_irq(&file->lock);
-	ret = snprintf(tbuf, SEC_DBGFS_VAL_MAX_LEN, "%u\n", val);
 
+	hisi_qm_put_dfx_access(qm);
+	ret = snprintf(tbuf, SEC_DBGFS_VAL_MAX_LEN, "%u\n", val);
 	return simple_read_from_buffer(buf, count, pos, tbuf, ret);
+
+err_input:
+	spin_unlock_irq(&file->lock);
+	hisi_qm_put_dfx_access(qm);
+	return -EINVAL;
 }
 
 static ssize_t sec_debug_write(struct file *filp, const char __user *buf,
@@ -609,6 +620,7 @@ static ssize_t sec_debug_write(struct file *filp, const char __user *buf,
 {
 	struct sec_debug_file *file = filp->private_data;
 	char tbuf[SEC_DBGFS_VAL_MAX_LEN];
+	struct hisi_qm *qm = file->qm;
 	unsigned long val;
 	int len, ret;
 
@@ -627,6 +639,10 @@ static ssize_t sec_debug_write(struct file *filp, const char __user *buf,
 	if (kstrtoul(tbuf, 0, &val))
 		return -EFAULT;
 
+	ret = hisi_qm_get_dfx_access(qm);
+	if (ret)
+		return ret;
+
 	spin_lock_irq(&file->lock);
 
 	switch (file->index) {
@@ -640,12 +656,11 @@ static ssize_t sec_debug_write(struct file *filp, const char __user *buf,
 		goto err_input;
 	}
 
-	spin_unlock_irq(&file->lock);
-
-	return count;
+	ret = count;
 
  err_input:
 	spin_unlock_irq(&file->lock);
+	hisi_qm_put_dfx_access(qm);
 	return ret;
 }
 
@@ -703,6 +718,7 @@ static int sec_core_debug_init(struct hisi_qm *qm)
 	regset->regs = sec_dfx_regs;
 	regset->nregs = ARRAY_SIZE(sec_dfx_regs);
 	regset->base = qm->io_base;
+	regset->dev = dev;
 
 	if (qm->pdev->device == SEC_PF_PCI_DEVICE_ID)
 		debugfs_create_file("regs", 0444, tmp_d, regset, &sec_regs_fops);
@@ -1013,6 +1029,8 @@ static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 			goto err_alg_unregister;
 	}
 
+	hisi_qm_pm_init(qm);
+
 	return 0;
 
 err_alg_unregister:
@@ -1032,6 +1050,7 @@ static void sec_remove(struct pci_dev *pdev)
 {
 	struct hisi_qm *qm = pci_get_drvdata(pdev);
 
+	hisi_qm_pm_uninit(qm);
 	hisi_qm_wait_task_finish(qm, &sec_devices);
 	if (qm->qp_num >= ctx_q_num)
 		hisi_qm_alg_unregister(qm, &sec_devices);
@@ -1051,6 +1070,10 @@ static void sec_remove(struct pci_dev *pdev)
 	sec_qm_uninit(qm);
 }
 
+static const struct dev_pm_ops sec_pm_ops = {
+	SET_RUNTIME_PM_OPS(hisi_qm_suspend, hisi_qm_resume, NULL)
+};
+
 static const struct pci_error_handlers sec_err_handler = {
 	.error_detected = hisi_qm_dev_err_detected,
 	.slot_reset	= hisi_qm_dev_slot_reset,
@@ -1066,6 +1089,7 @@ static struct pci_driver sec_pci_driver = {
 	.err_handler = &sec_err_handler,
 	.sriov_configure = hisi_qm_sriov_configure,
 	.shutdown = hisi_qm_dev_shutdown,
+	.driver.pm = &sec_pm_ops,
 };
 
 static void sec_register_debugfs(void)