On Thu, 2021-06-03 at 14:57 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of May 21, 2021 7:42 pm:
> > Changes to export the following NXGZIP capabilities through sysfs:
> >
> > /sys/devices/vio/ibm,compression-v1/NxGzCaps:
>
> Where's the horrible camel case name coming from? PowerVM?
Yes, pHyp provides the capabalities string.
Capability Description Descriptor Value Descriptor ascii Value
Overall NX Capabilities 0x4E78204361707320 “Nx Caps ”
NX GZIP Capabilities 0x4E78477A43617073 “NxGzCaps”
>
> Thanks,
> Nick
>
> > min_compress_len /*Recommended minimum compress length in bytes*/
> > min_decompress_len /*Recommended minimum decompress length in
> > bytes*/
> > req_max_processed_len /* Maximum number of bytes processed in one
> > request */
> >
> > NX will return RMA_Reject if the request buffer size is greater
> > than req_max_processed_len.
> >
> > Signed-off-by: Haren Myneni <haren@xxxxxxxxxxxxx>
> > Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> > ---
> > drivers/crypto/nx/nx-common-pseries.c | 43
> > +++++++++++++++++++++++++++
> > 1 file changed, 43 insertions(+)
> >
> > diff --git a/drivers/crypto/nx/nx-common-pseries.c
> > b/drivers/crypto/nx/nx-common-pseries.c
> > index 4a7278464156..121718a337fd 100644
> > --- a/drivers/crypto/nx/nx-common-pseries.c
> > +++ b/drivers/crypto/nx/nx-common-pseries.c
> > @@ -968,6 +968,36 @@ static struct attribute_group
> > nx842_attribute_group = {
> > .attrs = nx842_sysfs_entries,
> > };
> >
> > +#define nxct_caps_read(_name)
> > \
> > +static ssize_t nxct_##_name##_show(struct device *dev,
> > \
> > + struct device_attribute *attr, char *buf) \
> > +{
> > \
> > + return sprintf(buf, "%lld\n", nx_ct_caps._name); \
> > +}
> > +
> > +#define NXCT_ATTR_RO(_name)
> > \
> > + nxct_caps_read(_name);
> > \
> > + static struct device_attribute dev_attr_##_name = __ATTR(_name,
> > \
> > + 0444,
> > \
> > + nxct_##_name##_show,
> > \
> > + NULL);
> > +
> > +NXCT_ATTR_RO(req_max_processed_len);
> > +NXCT_ATTR_RO(min_compress_len);
> > +NXCT_ATTR_RO(min_decompress_len);
> > +
> > +static struct attribute *nxct_caps_sysfs_entries[] = {
> > + &dev_attr_req_max_processed_len.attr,
> > + &dev_attr_min_compress_len.attr,
> > + &dev_attr_min_decompress_len.attr,
> > + NULL,
> > +};
> > +
> > +static struct attribute_group nxct_caps_attr_group = {
> > + .name = nx_ct_caps.name,
> > + .attrs = nxct_caps_sysfs_entries,
> > +};
> > +
> > static struct nx842_driver nx842_pseries_driver = {
> > .name = KBUILD_MODNAME,
> > .owner = THIS_MODULE,
> > @@ -1057,6 +1087,16 @@ static int nx842_probe(struct vio_dev
> > *viodev,
> > goto error;
> > }
> >
> > + if (caps_feat) {
> > + if (sysfs_create_group(&viodev->dev.kobj,
> > + &nxct_caps_attr_group)) {
> > + dev_err(&viodev->dev,
> > + "Could not create sysfs NX capability
> > entries\n");
> > + ret = -1;
> > + goto error;
> > + }
> > + }
> > +
> > return 0;
> >
> > error_unlock:
> > @@ -1076,6 +1116,9 @@ static void nx842_remove(struct vio_dev
> > *viodev)
> > pr_info("Removing IBM Power 842 compression device\n");
> > sysfs_remove_group(&viodev->dev.kobj, &nx842_attribute_group);
> >
> > + if (caps_feat)
> > + sysfs_remove_group(&viodev->dev.kobj,
> > &nxct_caps_attr_group);
> > +
> > crypto_unregister_alg(&nx842_pseries_alg);
> >
> > spin_lock_irqsave(&devdata_mutex, flags);
> > --
> > 2.18.2
> >
> >
> >
