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authorShannon Nelson <shannon.nelson@amd.com>2023-05-19 14:56:24 -0700
committerMichael S. Tsirkin <mst@redhat.com>2023-06-27 10:47:08 -0400
commita16291b5bcbbd75586c8396555a0ee9fd4183372 (patch)
tree130f6927abe4aab55544e0f6e26f9cb2fd359639 /drivers/vdpa
parent5d7d82d39eb4cab2c7d0d85baaee0fc45d2c7900 (diff)
pds_vdpa: Add new vDPA driver for AMD/Pensando DSC
This is the initial auxiliary driver framework for a new vDPA device driver, an auxiliary_bus client of the pds_core driver. The pds_core driver supplies the PCI services for the VF device and for accessing the adminq in the PF device. This patch adds the very basics of registering for the auxiliary device and setting up debugfs entries. Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20230519215632.12343-4-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/Makefile1
-rw-r--r--drivers/vdpa/pds/Makefile8
-rw-r--r--drivers/vdpa/pds/aux_drv.c83
-rw-r--r--drivers/vdpa/pds/aux_drv.h15
-rw-r--r--drivers/vdpa/pds/debugfs.c25
-rw-r--r--drivers/vdpa/pds/debugfs.h12
6 files changed, 144 insertions, 0 deletions
diff --git a/drivers/vdpa/Makefile b/drivers/vdpa/Makefile
index 59396ff2a318..8f53c6f3cca7 100644
--- a/drivers/vdpa/Makefile
+++ b/drivers/vdpa/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_MLX5_VDPA) += mlx5/
obj-$(CONFIG_VP_VDPA) += virtio_pci/
obj-$(CONFIG_ALIBABA_ENI_VDPA) += alibaba/
obj-$(CONFIG_SNET_VDPA) += solidrun/
+obj-$(CONFIG_PDS_VDPA) += pds/
diff --git a/drivers/vdpa/pds/Makefile b/drivers/vdpa/pds/Makefile
new file mode 100644
index 000000000000..a9cd2f450ae1
--- /dev/null
+++ b/drivers/vdpa/pds/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright(c) 2023 Advanced Micro Devices, Inc
+
+obj-$(CONFIG_PDS_VDPA) := pds_vdpa.o
+
+pds_vdpa-y := aux_drv.o
+
+pds_vdpa-$(CONFIG_DEBUG_FS) += debugfs.o
diff --git a/drivers/vdpa/pds/aux_drv.c b/drivers/vdpa/pds/aux_drv.c
new file mode 100644
index 000000000000..e4a0ad61ea22
--- /dev/null
+++ b/drivers/vdpa/pds/aux_drv.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/auxiliary_bus.h>
+#include <linux/pci.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "aux_drv.h"
+#include "debugfs.h"
+
+static const struct auxiliary_device_id pds_vdpa_id_table[] = {
+ { .name = PDS_VDPA_DEV_NAME, },
+ {},
+};
+
+static int pds_vdpa_probe(struct auxiliary_device *aux_dev,
+ const struct auxiliary_device_id *id)
+
+{
+ struct pds_auxiliary_dev *padev =
+ container_of(aux_dev, struct pds_auxiliary_dev, aux_dev);
+ struct pds_vdpa_aux *vdpa_aux;
+
+ vdpa_aux = kzalloc(sizeof(*vdpa_aux), GFP_KERNEL);
+ if (!vdpa_aux)
+ return -ENOMEM;
+
+ vdpa_aux->padev = padev;
+ auxiliary_set_drvdata(aux_dev, vdpa_aux);
+
+ return 0;
+}
+
+static void pds_vdpa_remove(struct auxiliary_device *aux_dev)
+{
+ struct pds_vdpa_aux *vdpa_aux = auxiliary_get_drvdata(aux_dev);
+ struct device *dev = &aux_dev->dev;
+
+ kfree(vdpa_aux);
+ auxiliary_set_drvdata(aux_dev, NULL);
+
+ dev_info(dev, "Removed\n");
+}
+
+static struct auxiliary_driver pds_vdpa_driver = {
+ .name = PDS_DEV_TYPE_VDPA_STR,
+ .probe = pds_vdpa_probe,
+ .remove = pds_vdpa_remove,
+ .id_table = pds_vdpa_id_table,
+};
+
+static void __exit pds_vdpa_cleanup(void)
+{
+ auxiliary_driver_unregister(&pds_vdpa_driver);
+
+ pds_vdpa_debugfs_destroy();
+}
+module_exit(pds_vdpa_cleanup);
+
+static int __init pds_vdpa_init(void)
+{
+ int err;
+
+ pds_vdpa_debugfs_create();
+
+ err = auxiliary_driver_register(&pds_vdpa_driver);
+ if (err) {
+ pr_err("%s: aux driver register failed: %pe\n",
+ PDS_VDPA_DRV_NAME, ERR_PTR(err));
+ pds_vdpa_debugfs_destroy();
+ }
+
+ return err;
+}
+module_init(pds_vdpa_init);
+
+MODULE_DESCRIPTION(PDS_VDPA_DRV_DESCRIPTION);
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_LICENSE("GPL");
diff --git a/drivers/vdpa/pds/aux_drv.h b/drivers/vdpa/pds/aux_drv.h
new file mode 100644
index 000000000000..f1e99359424e
--- /dev/null
+++ b/drivers/vdpa/pds/aux_drv.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _AUX_DRV_H_
+#define _AUX_DRV_H_
+
+#define PDS_VDPA_DRV_DESCRIPTION "AMD/Pensando vDPA VF Device Driver"
+#define PDS_VDPA_DRV_NAME KBUILD_MODNAME
+
+struct pds_vdpa_aux {
+ struct pds_auxiliary_dev *padev;
+
+ struct dentry *dentry;
+};
+#endif /* _AUX_DRV_H_ */
diff --git a/drivers/vdpa/pds/debugfs.c b/drivers/vdpa/pds/debugfs.c
new file mode 100644
index 000000000000..5be22fb7a76a
--- /dev/null
+++ b/drivers/vdpa/pds/debugfs.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "aux_drv.h"
+#include "debugfs.h"
+
+static struct dentry *dbfs_dir;
+
+void pds_vdpa_debugfs_create(void)
+{
+ dbfs_dir = debugfs_create_dir(PDS_VDPA_DRV_NAME, NULL);
+}
+
+void pds_vdpa_debugfs_destroy(void)
+{
+ debugfs_remove_recursive(dbfs_dir);
+ dbfs_dir = NULL;
+}
diff --git a/drivers/vdpa/pds/debugfs.h b/drivers/vdpa/pds/debugfs.h
new file mode 100644
index 000000000000..658849591a99
--- /dev/null
+++ b/drivers/vdpa/pds/debugfs.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _PDS_VDPA_DEBUGFS_H_
+#define _PDS_VDPA_DEBUGFS_H_
+
+#include <linux/debugfs.h>
+
+void pds_vdpa_debugfs_create(void);
+void pds_vdpa_debugfs_destroy(void);
+
+#endif /* _PDS_VDPA_DEBUGFS_H_ */