vfio/pds: register with the pds_core PF
The pds_core driver will supply adminq services, so find the PF
and register with the DSC services.
Use the following commands to enable a VF:
echo 1 > /sys/bus/pci/drivers/pds_core/$PF_BDF/sriov_numvfs
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20230807205755.29579-5-brett.creeley@amd.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/drivers/vfio/pci/pds/cmds.c b/drivers/vfio/pci/pds/cmds.c
new file mode 100644
index 0000000..7f1618a
--- /dev/null
+++ b/drivers/vfio/pci/pds/cmds.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
+
+#include <linux/io.h>
+#include <linux/types.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+
+#include "vfio_dev.h"
+#include "cmds.h"
+
+int pds_vfio_register_client_cmd(struct pds_vfio_pci_device *pds_vfio)
+{
+ struct pci_dev *pdev = pds_vfio_to_pci_dev(pds_vfio);
+ char devname[PDS_DEVNAME_LEN];
+ struct pdsc *pdsc;
+ int ci;
+
+ snprintf(devname, sizeof(devname), "%s.%d-%u", PDS_VFIO_LM_DEV_NAME,
+ pci_domain_nr(pdev->bus),
+ PCI_DEVID(pdev->bus->number, pdev->devfn));
+
+ pdsc = pdsc_get_pf_struct(pdev);
+ if (IS_ERR(pdsc))
+ return PTR_ERR(pdsc);
+
+ ci = pds_client_register(pdsc, devname);
+ if (ci < 0)
+ return ci;
+
+ pds_vfio->client_id = ci;
+
+ return 0;
+}
+
+void pds_vfio_unregister_client_cmd(struct pds_vfio_pci_device *pds_vfio)
+{
+ struct pci_dev *pdev = pds_vfio_to_pci_dev(pds_vfio);
+ struct pdsc *pdsc;
+ int err;
+
+ pdsc = pdsc_get_pf_struct(pdev);
+ if (IS_ERR(pdsc))
+ return;
+
+ err = pds_client_unregister(pdsc, pds_vfio->client_id);
+ if (err)
+ dev_err(&pdev->dev, "unregister from DSC failed: %pe\n",
+ ERR_PTR(err));
+
+ pds_vfio->client_id = 0;
+}
