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From: Shannon Nelson via Virtualization <virtualization@lists.linux-foundation.org>
To: <jasowang@redhat.com>, <mst@redhat.com>,
	<virtualization@lists.linux-foundation.org>,
	<shannon.nelson@amd.com>, <brett.creeley@amd.com>,
	<netdev@vger.kernel.org>
Cc: drivers@pensando.io
Subject: [PATCH v4 virtio 02/10] pds_vdpa: Add new vDPA driver for AMD/Pensando DSC
Date: Tue, 25 Apr 2023 14:25:54 -0700	[thread overview]
Message-ID: <20230425212602.1157-3-shannon.nelson@amd.com> (raw)
In-Reply-To: <20230425212602.1157-1-shannon.nelson@amd.com>

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>
---
 drivers/vdpa/Makefile          |  1 +
 drivers/vdpa/pds/Makefile      |  8 ++++
 drivers/vdpa/pds/aux_drv.c     | 83 ++++++++++++++++++++++++++++++++++
 drivers/vdpa/pds/aux_drv.h     | 15 ++++++
 drivers/vdpa/pds/debugfs.c     | 25 ++++++++++
 drivers/vdpa/pds/debugfs.h     | 12 +++++
 include/linux/pds/pds_common.h |  2 +
 7 files changed, 146 insertions(+)
 create mode 100644 drivers/vdpa/pds/Makefile
 create mode 100644 drivers/vdpa/pds/aux_drv.c
 create mode 100644 drivers/vdpa/pds/aux_drv.h
 create mode 100644 drivers/vdpa/pds/debugfs.c
 create mode 100644 drivers/vdpa/pds/debugfs.h

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_ */
diff --git a/include/linux/pds/pds_common.h b/include/linux/pds/pds_common.h
index 060331486d50..2a0d1669cfd0 100644
--- a/include/linux/pds/pds_common.h
+++ b/include/linux/pds/pds_common.h
@@ -39,6 +39,8 @@ enum pds_core_vif_types {
 #define PDS_DEV_TYPE_RDMA_STR	"RDMA"
 #define PDS_DEV_TYPE_LM_STR	"LM"
 
+#define PDS_VDPA_DEV_NAME	PDS_CORE_DRV_NAME "." PDS_DEV_TYPE_VDPA_STR
+
 #define PDS_CORE_IFNAMSIZ		16
 
 /**
-- 
2.17.1

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  parent reply	other threads:[~2023-04-25 21:26 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-25 21:25 [PATCH v4 virtio 00/10] pds_vdpa driver Shannon Nelson via Virtualization
2023-04-25 21:25 ` [PATCH v4 virtio 01/10] virtio: allow caller to override device id and DMA mask Shannon Nelson via Virtualization
2023-04-26  2:09   ` Xuan Zhuo
2023-04-26  2:41     ` Shannon Nelson via Virtualization
     [not found]   ` <ZE/QS0lnUvxFacjf@corigine.com>
2023-05-03 14:21     ` Shannon Nelson via Virtualization
2023-04-25 21:25 ` Shannon Nelson via Virtualization [this message]
2023-04-25 21:25 ` [PATCH v4 virtio 03/10] pds_vdpa: move enum from common to adminq header Shannon Nelson via Virtualization
2023-04-25 21:25 ` [PATCH v4 virtio 04/10] pds_vdpa: new adminq entries Shannon Nelson via Virtualization
2023-04-25 21:25 ` [PATCH v4 virtio 05/10] pds_vdpa: get vdpa management info Shannon Nelson via Virtualization
2023-04-25 21:25 ` [PATCH v4 virtio 06/10] pds_vdpa: virtio bar setup for vdpa Shannon Nelson via Virtualization
2023-04-25 21:25 ` [PATCH v4 virtio 07/10] pds_vdpa: add vdpa config client commands Shannon Nelson via Virtualization
2023-04-25 21:26 ` [PATCH v4 virtio 08/10] pds_vdpa: add support for vdpa and vdpamgmt interfaces Shannon Nelson via Virtualization
2023-04-25 21:26 ` [PATCH v4 virtio 09/10] pds_vdpa: subscribe to the pds_core events Shannon Nelson via Virtualization
2023-04-25 21:26 ` [PATCH v4 virtio 10/10] pds_vdpa: pds_vdps.rst and Kconfig Shannon Nelson via Virtualization

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