linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<linux-crypto@vger.kernel.org>
Cc: <alex.williamson@redhat.com>, <jgg@nvidia.com>,
	<mgurtovoy@nvidia.com>, <linuxarm@huawei.com>,
	<liulongfang@huawei.com>, <prime.zeng@hisilicon.com>,
	<yuzenghui@huawei.com>, <jonathan.cameron@huawei.com>,
	<wangzhou1@hisilicon.com>
Subject: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices
Date: Fri, 2 Jul 2021 10:58:46 +0100	[thread overview]
Message-ID: <20210702095849.1610-2-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210702095849.1610-1-shameerali.kolothum.thodi@huawei.com>

Add a vendor-specific vfio_pci driver for HiSilicon ACC devices.
This will be extended in follow-up patches to add support for
vfio live migration feature.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/vfio/pci/Kconfig             |   9 +++
 drivers/vfio/pci/Makefile            |   2 +
 drivers/vfio/pci/hisi_acc_vfio_pci.c | 100 +++++++++++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100644 drivers/vfio/pci/hisi_acc_vfio_pci.c

diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig
index 9cdef46dd299..709807c28153 100644
--- a/drivers/vfio/pci/Kconfig
+++ b/drivers/vfio/pci/Kconfig
@@ -57,3 +57,12 @@ config MLX5_VFIO_PCI
 	  framework.
 
 	  If you don't know what to do here, say N.
+
+config HISI_ACC_VFIO_PCI
+	tristate "VFIO support for HiSilicon ACC devices"
+	depends on ARM64 && VFIO_PCI_CORE
+	help
+	  This provides generic PCI support for HiSilicon devices using the VFIO
+	  framework.
+
+	  If you don't know what to do here, say N.
diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile
index a0df9c2a4bd9..d1de3e81921f 100644
--- a/drivers/vfio/pci/Makefile
+++ b/drivers/vfio/pci/Makefile
@@ -3,6 +3,7 @@
 obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o
 obj-$(CONFIG_VFIO_PCI) += vfio-pci.o
 obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5-vfio-pci.o
+obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o
 
 vfio-pci-core-y := vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o
 vfio-pci-core-$(CONFIG_S390) += vfio_pci_zdev.o
@@ -11,3 +12,4 @@ vfio-pci-y := vfio_pci.o
 vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o
 
 mlx5-vfio-pci-y := mlx5_vfio_pci.o
+hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o
diff --git a/drivers/vfio/pci/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisi_acc_vfio_pci.c
new file mode 100644
index 000000000000..a9e173098ab5
--- /dev/null
+++ b/drivers/vfio/pci/hisi_acc_vfio_pci.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021, HiSilicon Ltd.
+ */
+
+#include <linux/device.h>
+#include <linux/eventfd.h>
+#include <linux/file.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/vfio.h>
+#include <linux/vfio_pci_core.h>
+
+static int hisi_acc_vfio_pci_open(struct vfio_device *core_vdev)
+{
+	struct vfio_pci_core_device *vdev =
+		container_of(core_vdev, struct vfio_pci_core_device, vdev);
+	int ret;
+
+	lockdep_assert_held(&core_vdev->reflck->lock);
+
+	ret = vfio_pci_core_enable(vdev);
+	if (ret)
+		return ret;
+
+	vfio_pci_core_finish_enable(vdev);
+
+	return 0;
+}
+
+static const struct vfio_device_ops hisi_acc_vfio_pci_ops = {
+	.name		= "hisi-acc-vfio-pci",
+	.open		= hisi_acc_vfio_pci_open,
+	.release	= vfio_pci_core_release,
+	.ioctl		= vfio_pci_core_ioctl,
+	.read		= vfio_pci_core_read,
+	.write		= vfio_pci_core_write,
+	.mmap		= vfio_pci_core_mmap,
+	.request	= vfio_pci_core_request,
+	.match		= vfio_pci_core_match,
+	.reflck_attach	= vfio_pci_core_reflck_attach,
+};
+
+static int hisi_acc_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct vfio_pci_core_device *vdev;
+	int ret;
+
+	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
+	if (!vdev)
+		return -ENOMEM;
+
+	ret = vfio_pci_core_register_device(vdev, pdev, &hisi_acc_vfio_pci_ops);
+	if (ret)
+		goto out_free;
+
+	dev_set_drvdata(&pdev->dev, vdev);
+
+	return 0;
+
+out_free:
+	kfree(vdev);
+	return ret;
+}
+
+static void hisi_acc_vfio_pci_remove(struct pci_dev *pdev)
+{
+	struct vfio_pci_core_device *vdev = dev_get_drvdata(&pdev->dev);
+
+	vfio_pci_core_unregister_device(vdev);
+	kfree(vdev);
+}
+
+static const struct pci_device_id hisi_acc_vfio_pci_table[] = {
+	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, 0xa256) }, /* SEC VF */
+	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, 0xa259) }, /* HPRE VF */
+	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, 0xa251) }, /* ZIP VF */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, hisi_acc_vfio_pci_table);
+
+static struct pci_driver hisi_acc_vfio_pci_driver = {
+	.name			= "hisi-acc-vfio-pci",
+	.id_table		= hisi_acc_vfio_pci_table,
+	.probe			= hisi_acc_vfio_pci_probe,
+	.remove			= hisi_acc_vfio_pci_remove,
+#ifdef CONFIG_PCI_IOV
+	.sriov_configure	= vfio_pci_core_sriov_configure,
+#endif
+	.err_handler		= &vfio_pci_core_err_handlers,
+};
+
+module_pci_driver(hisi_acc_vfio_pci_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Liu Longfang <liulongfang@huawei.com>");
+MODULE_AUTHOR("Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>");
+MODULE_DESCRIPTION("HiSilicon VFIO PCI - Generic VFIO PCI driver for HiSilicon ACC device family");
-- 
2.17.1


  reply	other threads:[~2021-07-02  9:59 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-02  9:58 [RFC v2 0/4] vfio/hisilicon: add acc live migration driver Shameer Kolothum
2021-07-02  9:58 ` Shameer Kolothum [this message]
2021-07-02 20:29   ` [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices Alex Williamson
2021-07-05  7:20     ` Shameerali Kolothum Thodi
2021-07-04  7:03   ` Leon Romanovsky
2021-07-05  8:47     ` Shameerali Kolothum Thodi
2021-07-05  9:41       ` Max Gurtovoy
2021-07-05 10:18         ` Shameerali Kolothum Thodi
2021-07-05 18:27           ` Leon Romanovsky
2021-07-05 18:32             ` Jason Gunthorpe
2021-07-06  3:59               ` Leon Romanovsky
2021-07-06  4:39               ` Christoph Hellwig
2021-07-06 11:51                 ` Jason Gunthorpe
2021-07-02  9:58 ` [RFC v2 2/4] hisi_acc_vfio_pci: Override ioctl method to limit BAR2 region size Shameer Kolothum
2021-07-02 20:29   ` Alex Williamson
2021-07-05  7:22     ` Shameerali Kolothum Thodi
2021-07-02  9:58 ` [RFC v2 3/4] crypto: hisilicon/qm - Export mailbox functions for common use Shameer Kolothum
2021-07-04  9:34   ` Max Gurtovoy
2021-07-05 10:23     ` Shameerali Kolothum Thodi
2021-07-02  9:58 ` [RFC v2 4/4] hisi_acc_vfio_pci: Add support for vfio live migration Shameer Kolothum

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210702095849.1610-2-shameerali.kolothum.thodi@huawei.com \
    --to=shameerali.kolothum.thodi@huawei.com \
    --cc=alex.williamson@redhat.com \
    --cc=jgg@nvidia.com \
    --cc=jonathan.cameron@huawei.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-crypto@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxarm@huawei.com \
    --cc=liulongfang@huawei.com \
    --cc=mgurtovoy@nvidia.com \
    --cc=prime.zeng@hisilicon.com \
    --cc=wangzhou1@hisilicon.com \
    --cc=yuzenghui@huawei.com \
    --subject='Re: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).