crypto: qat - replace state machine calls

The device state machine functions are unsafe and interdependent on each
other. To perform a state transition, these shall be called in a
specific order:
  * device up:   adf_dev_init() -> adf_dev_start()
  * device down: adf_dev_stop() -> adf_dev_shutdown()

Replace all the state machine functions used in the QAT driver with the
safe wrappers adf_dev_up() and adf_dev_down().
Signed-off-by: Shashank Gupta <shashank.gupta@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_4xxx/adf_drv.c

@@ -411,15 +411,7 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_err_disable_aer;
 	}
 
-	ret = hw_data->dev_config(accel_dev);
-	if (ret)
-		goto out_err_disable_aer;
-
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, true);
 	if (ret)
 		goto out_err_dev_stop;
 
@@ -430,9 +422,7 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_disable_aer:
 	adf_disable_aer(accel_dev);
 out_err:
@@ -448,8 +438,7 @@ static void adf_remove(struct pci_dev *pdev)
 		pr_err("QAT: Driver removal failed\n");
 		return;
 	}
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_disable_aer(accel_dev);
 	adf_cleanup_accel(accel_dev);
 }

drivers/crypto/qat/qat_c3xxx/adf_drv.c

@@ -201,24 +201,14 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_err_disable_aer;
 	}
 
-	ret = hw_data->dev_config(accel_dev);
-	if (ret)
-		goto out_err_disable_aer;
-
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, true);
 	if (ret)
 		goto out_err_dev_stop;
 
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_disable_aer:
 	adf_disable_aer(accel_dev);
 out_err_free_reg:
@@ -239,8 +229,7 @@ static void adf_remove(struct pci_dev *pdev)
 		pr_err("QAT: Driver removal failed\n");
 		return;
 	}
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_disable_aer(accel_dev);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);

drivers/crypto/qat/qat_c3xxxvf/adf_drv.c

@@ -173,20 +173,14 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* Completion for VF2PF request/response message exchange */
 	init_completion(&accel_dev->vf.msg_received);
 
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, false);
 	if (ret)
 		goto out_err_dev_stop;
 
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_free_reg:
 	pci_release_regions(accel_pci_dev->pci_dev);
 out_err_disable:
@@ -206,8 +200,7 @@ static void adf_remove(struct pci_dev *pdev)
 		return;
 	}
 	adf_flush_vf_wq(accel_dev);
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);
 	kfree(accel_dev);

drivers/crypto/qat/qat_c62x/adf_drv.c

@@ -201,24 +201,14 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_err_disable_aer;
 	}
 
-	ret = hw_data->dev_config(accel_dev);
-	if (ret)
-		goto out_err_disable_aer;
-
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, true);
 	if (ret)
 		goto out_err_dev_stop;
 
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_disable_aer:
 	adf_disable_aer(accel_dev);
 out_err_free_reg:
@@ -239,8 +229,7 @@ static void adf_remove(struct pci_dev *pdev)
 		pr_err("QAT: Driver removal failed\n");
 		return;
 	}
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_disable_aer(accel_dev);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);

drivers/crypto/qat/qat_c62xvf/adf_drv.c

@@ -173,20 +173,14 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* Completion for VF2PF request/response message exchange */
 	init_completion(&accel_dev->vf.msg_received);
 
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, false);
 	if (ret)
 		goto out_err_dev_stop;
 
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_free_reg:
 	pci_release_regions(accel_pci_dev->pci_dev);
 out_err_disable:
@@ -206,8 +200,7 @@ static void adf_remove(struct pci_dev *pdev)
 		return;
 	}
 	adf_flush_vf_wq(accel_dev);
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);
 	kfree(accel_dev);

drivers/crypto/qat/qat_common/adf_ctl_drv.c

@@ -244,8 +244,7 @@ static void adf_ctl_stop_devices(u32 id)
 			if (!accel_dev->is_vf)
 				continue;
 
-			adf_dev_stop(accel_dev);
-			adf_dev_shutdown(accel_dev);
+			adf_dev_down(accel_dev, false);
 		}
 	}
 
@@ -254,8 +253,7 @@ static void adf_ctl_stop_devices(u32 id)
 			if (!adf_dev_started(accel_dev))
 				continue;
 
-			adf_dev_stop(accel_dev);
-			adf_dev_shutdown(accel_dev);
+			adf_dev_down(accel_dev, false);
 		}
 	}
 }
@@ -309,23 +307,16 @@ static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
 	if (!accel_dev)
 		goto out;
 
-	if (!adf_dev_started(accel_dev)) {
-		dev_info(&GET_DEV(accel_dev),
-			 "Starting acceleration device qat_dev%d.\n",
-			 ctl_data->device_id);
-		ret = adf_dev_init(accel_dev);
-		if (!ret)
-			ret = adf_dev_start(accel_dev);
-	} else {
-		dev_info(&GET_DEV(accel_dev),
-			 "Acceleration device qat_dev%d already started.\n",
-			 ctl_data->device_id);
-	}
+	dev_info(&GET_DEV(accel_dev),
+		 "Starting acceleration device qat_dev%d.\n",
+		 ctl_data->device_id);
+
+	ret = adf_dev_up(accel_dev, false);
+
 	if (ret) {
 		dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
 			ctl_data->device_id);
-		adf_dev_stop(accel_dev);
-		adf_dev_shutdown(accel_dev);
+		adf_dev_down(accel_dev, false);
 	}
 out:
 	kfree(ctl_data);

drivers/crypto/qat/qat_common/adf_sriov.c

@@ -159,7 +159,7 @@ int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
 			return -EBUSY;
 		}
 
-		ret = adf_dev_shutdown_cache_cfg(accel_dev);
+		ret = adf_dev_down(accel_dev, true);
 		if (ret)
 			return ret;
 	}
@@ -184,13 +184,7 @@ int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
 	if (!accel_dev->pf.vf_info)
 		return -ENOMEM;
 
-	if (adf_dev_init(accel_dev)) {
-		dev_err(&GET_DEV(accel_dev), "Failed to init qat_dev%d\n",
-			accel_dev->accel_id);
-		return -EFAULT;
-	}
-
-	if (adf_dev_start(accel_dev)) {
+	if (adf_dev_up(accel_dev, false)) {
 		dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
 			accel_dev->accel_id);
 		return -EFAULT;

drivers/crypto/qat/qat_common/adf_vf_isr.c

@@ -71,8 +71,7 @@ static void adf_dev_stop_async(struct work_struct *work)
 	struct adf_accel_dev *accel_dev = stop_data->accel_dev;
 
 	adf_dev_restarting_notify(accel_dev);
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 
 	/* Re-enable PF2VF interrupts */
 	adf_enable_pf2vf_interrupts(accel_dev);

drivers/crypto/qat/qat_dh895xcc/adf_drv.c

@@ -201,24 +201,14 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_err_disable_aer;
 	}
 
-	ret = hw_data->dev_config(accel_dev);
-	if (ret)
-		goto out_err_disable_aer;
-
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, true);
 	if (ret)
 		goto out_err_dev_stop;
 
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_disable_aer:
 	adf_disable_aer(accel_dev);
 out_err_free_reg:
@@ -239,8 +229,7 @@ static void adf_remove(struct pci_dev *pdev)
 		pr_err("QAT: Driver removal failed\n");
 		return;
 	}
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_disable_aer(accel_dev);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);

drivers/crypto/qat/qat_dh895xccvf/adf_drv.c

@@ -173,20 +173,14 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* Completion for VF2PF request/response message exchange */
 	init_completion(&accel_dev->vf.msg_received);
 
-	ret = adf_dev_init(accel_dev);
-	if (ret)
-		goto out_err_dev_shutdown;
-
-	ret = adf_dev_start(accel_dev);
+	ret = adf_dev_up(accel_dev, false);
 	if (ret)
 		goto out_err_dev_stop;
 
 	return ret;
 
 out_err_dev_stop:
-	adf_dev_stop(accel_dev);
-out_err_dev_shutdown:
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 out_err_free_reg:
 	pci_release_regions(accel_pci_dev->pci_dev);
 out_err_disable:
@@ -206,8 +200,7 @@ static void adf_remove(struct pci_dev *pdev)
 		return;
 	}
 	adf_flush_vf_wq(accel_dev);
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
+	adf_dev_down(accel_dev, false);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);
 	kfree(accel_dev);