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Date: Tue, 7 Mar 2023 21:24:46 -0800
From: Brett Creeley <brett.creeley@....com>
To: <kvm@...r.kernel.org>, <netdev@...r.kernel.org>,
<alex.williamson@...hat.com>, <jgg@...dia.com>,
<yishaih@...dia.com>, <shameerali.kolothum.thodi@...wei.com>,
<kevin.tian@...el.com>
CC: <brett.creeley@....com>, <shannon.nelson@....com>,
<drivers@...sando.io>
Subject: [RFC PATCH v4 3/7] 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/$PF_BDF/sriov_numvfs
Signed-off-by: Brett Creeley <brett.creeley@....com>
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
drivers/vfio/pci/pds/Makefile | 1 +
drivers/vfio/pci/pds/cmds.c | 66 +++++++++++++++++++++++++++++++++
drivers/vfio/pci/pds/cmds.h | 12 ++++++
drivers/vfio/pci/pds/pci_drv.c | 14 ++++++-
drivers/vfio/pci/pds/pci_drv.h | 9 +++++
drivers/vfio/pci/pds/vfio_dev.c | 5 +++
drivers/vfio/pci/pds/vfio_dev.h | 2 +
include/linux/pds/pds_lm.h | 12 ++++++
8 files changed, 120 insertions(+), 1 deletion(-)
create mode 100644 drivers/vfio/pci/pds/cmds.c
create mode 100644 drivers/vfio/pci/pds/cmds.h
create mode 100644 drivers/vfio/pci/pds/pci_drv.h
create mode 100644 include/linux/pds/pds_lm.h
diff --git a/drivers/vfio/pci/pds/Makefile b/drivers/vfio/pci/pds/Makefile
index e1a55ae0f079..87581111fa17 100644
--- a/drivers/vfio/pci/pds/Makefile
+++ b/drivers/vfio/pci/pds/Makefile
@@ -4,5 +4,6 @@
obj-$(CONFIG_PDS_VFIO_PCI) += pds_vfio.o
pds_vfio-y := \
+ cmds.o \
pci_drv.o \
vfio_dev.o
diff --git a/drivers/vfio/pci/pds/cmds.c b/drivers/vfio/pci/pds/cmds.c
new file mode 100644
index 000000000000..e30ecea91e09
--- /dev/null
+++ b/drivers/vfio/pci/pds/cmds.c
@@ -0,0 +1,66 @@
+// 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_core_if.h>
+#include <linux/pds/pds_core.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_lm.h>
+
+#include "vfio_dev.h"
+#include "cmds.h"
+
+int
+pds_vfio_register_client_cmd(struct pds_vfio_pci_device *pds_vfio)
+{
+ union pds_core_adminq_comp comp = { 0 };
+ union pds_core_adminq_cmd cmd = { 0 };
+ struct device *dev;
+ int err;
+ u16 ci;
+
+ dev = &pds_vfio->pdev->dev;
+ cmd.client_reg.opcode = PDS_AQ_CMD_CLIENT_REG;
+ snprintf(cmd.client_reg.devname, sizeof(cmd.client_reg.devname),
+ "%s.%d", PDS_LM_DEV_NAME, pds_vfio->pdsc->id);
+
+ err = pdsc_adminq_post(pds_vfio->pdsc, &pds_vfio->pdsc->adminqcq,
+ &cmd, &comp, false);
+ if (err) {
+ dev_info(dev, "register with DSC failed, status %d: %pe\n",
+ comp.status, ERR_PTR(err));
+ return err;
+ }
+
+ ci = le16_to_cpu(comp.client_reg.client_id);
+ if (!ci) {
+ dev_err(dev, "%s: device returned null client_id\n", __func__);
+ return -EIO;
+ }
+ pds_vfio->client_id = ci;
+
+ return 0;
+}
+
+void
+pds_vfio_unregister_client_cmd(struct pds_vfio_pci_device *pds_vfio)
+{
+ union pds_core_adminq_comp comp = { 0 };
+ union pds_core_adminq_cmd cmd = { 0 };
+ struct device *dev;
+ int err;
+
+ dev = &pds_vfio->pdev->dev;
+ cmd.client_unreg.opcode = PDS_AQ_CMD_CLIENT_UNREG;
+ cmd.client_unreg.client_id = cpu_to_le16(pds_vfio->client_id);
+
+ err = pdsc_adminq_post(pds_vfio->pdsc, &pds_vfio->pdsc->adminqcq,
+ &cmd, &comp, false);
+ if (err)
+ dev_info(dev, "unregister from DSC failed, status %d: %pe\n",
+ comp.status, ERR_PTR(err));
+
+ pds_vfio->client_id = 0;
+}
diff --git a/drivers/vfio/pci/pds/cmds.h b/drivers/vfio/pci/pds/cmds.h
new file mode 100644
index 000000000000..5efc54a7b9b9
--- /dev/null
+++ b/drivers/vfio/pci/pds/cmds.h
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
+
+#ifndef _CMDS_H_
+#define _CMDS_H_
+
+struct pds_vfio_pci_device;
+
+int pds_vfio_register_client_cmd(struct pds_vfio_pci_device *pds_vfio);
+void pds_vfio_unregister_client_cmd(struct pds_vfio_pci_device *pds_vfio);
+
+#endif /* _CMDS_H_ */
diff --git a/drivers/vfio/pci/pds/pci_drv.c b/drivers/vfio/pci/pds/pci_drv.c
index 5e554420792e..b1e5ea854200 100644
--- a/drivers/vfio/pci/pds/pci_drv.c
+++ b/drivers/vfio/pci/pds/pci_drv.c
@@ -9,8 +9,11 @@
#include <linux/vfio.h>
#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_core.h>
#include "vfio_dev.h"
+#include "pci_drv.h"
+#include "cmds.h"
#define PDS_VFIO_DRV_NAME "pds_vfio"
#define PDS_VFIO_DRV_DESCRIPTION "AMD/Pensando VFIO Device Driver"
@@ -30,13 +33,22 @@ pds_vfio_pci_probe(struct pci_dev *pdev,
dev_set_drvdata(&pdev->dev, &pds_vfio->vfio_coredev);
pds_vfio->pdev = pdev;
+ pds_vfio->pdsc = pdsc_get_pf_struct(pdev);
+
+ err = pds_vfio_register_client_cmd(pds_vfio);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register as client: %pe\n",
+ ERR_PTR(err));
+ goto out_put_vdev;
+ }
err = vfio_pci_core_register_device(&pds_vfio->vfio_coredev);
if (err)
- goto out_put_vdev;
+ goto out_unreg_client;
return 0;
+out_unreg_client:
out_put_vdev:
vfio_put_device(&pds_vfio->vfio_coredev.vdev);
return err;
diff --git a/drivers/vfio/pci/pds/pci_drv.h b/drivers/vfio/pci/pds/pci_drv.h
new file mode 100644
index 000000000000..1b192aecf343
--- /dev/null
+++ b/drivers/vfio/pci/pds/pci_drv.h
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
+
+#ifndef _PCI_DRV_H
+#define _PCI_DRV_H
+
+#include <linux/pci.h>
+
+#endif /* _PCI_DRV_H */
diff --git a/drivers/vfio/pci/pds/vfio_dev.c b/drivers/vfio/pci/pds/vfio_dev.c
index f1221f14e4f6..592b10a279f0 100644
--- a/drivers/vfio/pci/pds/vfio_dev.c
+++ b/drivers/vfio/pci/pds/vfio_dev.c
@@ -31,6 +31,11 @@ pds_vfio_init_device(struct vfio_device *vdev)
pds_vfio->vf_id = pci_iov_vf_id(pdev);
pds_vfio->pci_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
+ dev_dbg(&pdev->dev, "%s: PF %#04x VF %#04x (%d) vf_id %d domain %d pds_vfio %p\n",
+ __func__, pci_dev_id(pdev->physfn),
+ pds_vfio->pci_id, pds_vfio->pci_id, pds_vfio->vf_id,
+ pci_domain_nr(pdev->bus), pds_vfio);
+
return 0;
}
diff --git a/drivers/vfio/pci/pds/vfio_dev.h b/drivers/vfio/pci/pds/vfio_dev.h
index d9f0203c1649..614640194c36 100644
--- a/drivers/vfio/pci/pds/vfio_dev.h
+++ b/drivers/vfio/pci/pds/vfio_dev.h
@@ -10,9 +10,11 @@
struct pds_vfio_pci_device {
struct vfio_pci_core_device vfio_coredev;
struct pci_dev *pdev;
+ struct pdsc *pdsc;
int vf_id;
int pci_id;
+ u16 client_id;
};
const struct vfio_device_ops *pds_vfio_ops_info(void);
diff --git a/include/linux/pds/pds_lm.h b/include/linux/pds/pds_lm.h
new file mode 100644
index 000000000000..fdaf2bf71d35
--- /dev/null
+++ b/include/linux/pds/pds_lm.h
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2022 Pensando Systems, Inc */
+
+#ifndef _PDS_LM_H_
+#define _PDS_LM_H_
+
+#include "pds_common.h"
+
+#define PDS_DEV_TYPE_LM_STR "LM"
+#define PDS_LM_DEV_NAME PDS_CORE_DRV_NAME "." PDS_DEV_TYPE_LM_STR
+
+#endif /* _PDS_LM_H_ */
--
2.17.1
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