From 5ee52118ac1481dd8a8f7e6a9bfe6ee05ac6ec92 Mon Sep 17 00:00:00 2001 From: Giovanni Cabiddu Date: Mon, 27 Jun 2022 09:36:49 +0100 Subject: crypto: qat - expose device state through sysfs for 4xxx Expose the device state through an attribute in sysfs and allow to change it. This is to stop and shutdown a QAT device in order to change its configuration. The state attribute has been added to a newly created `qat` attribute group which will contain all _QAT specific_ attributes. The logic that implements the sysfs entries is part of a new file, adf_sysfs.c. This exposes an entry point to allow the driver to create attributes. The function that creates the sysfs attributes is called from the probe function of the driver and not in the state machine init function to allow the change of states even if the device is in the down state. In order to restore the device configuration between a transition from down to up, the function that configures the devices has been abstracted into the HW data structure. The `state` attribute is only exposed for qat_4xxx devices. Signed-off-by: Giovanni Cabiddu Co-developed-by: Tomasz Kowallik Signed-off-by: Tomasz Kowallik Reviewed-by: Adam Guerin Reviewed-by: Fiona Trahe Reviewed-by: Wojciech Ziemba Reviewed-by: Vladis Dronov Signed-off-by: Herbert Xu --- drivers/crypto/qat/qat_4xxx/adf_drv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/crypto/qat/qat_4xxx/adf_drv.c') diff --git a/drivers/crypto/qat/qat_4xxx/adf_drv.c b/drivers/crypto/qat/qat_4xxx/adf_drv.c index 181fa1c8b3c7..2f212561acc4 100644 --- a/drivers/crypto/qat/qat_4xxx/adf_drv.c +++ b/drivers/crypto/qat/qat_4xxx/adf_drv.c @@ -53,7 +53,7 @@ static int adf_cfg_dev_init(struct adf_accel_dev *accel_dev) return 0; } -static int adf_crypto_dev_config(struct adf_accel_dev *accel_dev) +int adf_crypto_dev_config(struct adf_accel_dev *accel_dev) { char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES]; int banks = GET_MAX_BANKS(accel_dev); @@ -289,6 +289,10 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto out_err_disable_aer; } + ret = adf_sysfs_init(accel_dev); + if (ret) + goto out_err_disable_aer; + ret = adf_crypto_dev_config(accel_dev); if (ret) goto out_err_disable_aer; -- cgit v1.2.3