Commit 71fed09b authored by Ciunas Bennett's avatar Ciunas Bennett Committed by Herbert Xu
Browse files

crypto: qat - add num_rps sysfs attribute 



Add the attribute `num_rps` to the `qat` attribute group. This returns
the number of ring pairs that a single device has. This allows to know
the maximum value that can be set to the attribute `rp2svc`.

Signed-off-by: default avatarCiunas Bennett <ciunas.bennett@intel.com>
Reviewed-by: default avatarGiovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: default avatarDamian Muszynski <damian.muszynski@intel.com>
Reviewed-by: default avatarTero Kristo <tero.kristo@linux.intel.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent dbc8876d

Documentation/ABI/testing/sysfs-driver-qat

+14 −0
Original line number Diff line number Diff line
@@ -127,3 +127,17 @@ Description: 
			sym



		This attribute is only available for qat_4xxx devices.



What:		/sys/bus/pci/devices/<BDF>/qat/num_rps

Date:		January 2024

KernelVersion:	6.7

Contact:	qat-linux@intel.com

Description:

		(RO) Returns the number of ring pairs that a single device has.



		Example usage::



			# cat /sys/bus/pci/devices/<BDF>/qat/num_rps

			64



		This attribute is only available for qat_4xxx devices.

drivers/crypto/intel/qat/qat_common/adf_sysfs.c

+14 −0
Original line number Diff line number Diff line
@@ -268,11 +268,25 @@ static ssize_t rp2srv_store(struct device *dev, struct device_attribute *attr, 
}

static DEVICE_ATTR_RW(rp2srv);



static ssize_t num_rps_show(struct device *dev, struct device_attribute *attr,

			    char *buf)

{

	struct adf_accel_dev *accel_dev;



	accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));

	if (!accel_dev)

		return -EINVAL;



	return sysfs_emit(buf, "%u\n", GET_MAX_BANKS(accel_dev));

}

static DEVICE_ATTR_RO(num_rps);



static struct attribute *qat_attrs[] = {

	&dev_attr_state.attr,

	&dev_attr_cfg_services.attr,

	&dev_attr_pm_idle_enabled.attr,

	&dev_attr_rp2srv.attr,

	&dev_attr_num_rps.attr,

	NULL,

};