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From: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
	"jgg@nvidia.com" <jgg@nvidia.com>,
	"mgurtovoy@nvidia.com" <mgurtovoy@nvidia.com>,
	Linuxarm <linuxarm@huawei.com>,
	liulongfang <liulongfang@huawei.com>,
	"Zengtao (B)" <prime.zeng@hisilicon.com>,
	yuzenghui <yuzenghui@huawei.com>,
	Jonathan Cameron <jonathan.cameron@huawei.com>,
	"Wangzhou (B)" <wangzhou1@hisilicon.com>
Subject: RE: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices
Date: Mon, 5 Jul 2021 07:20:11 +0000	[thread overview]
Message-ID: <1582579447b449f496904f219402acb2@huawei.com> (raw)
In-Reply-To: <20210702142924.57ad33dc.alex.williamson@redhat.com>



> -----Original Message-----
> From: Alex Williamson [mailto:alex.williamson@redhat.com]
> Sent: 02 July 2021 21:29
> To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
> Cc: kvm@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-crypto@vger.kernel.org; jgg@nvidia.com; mgurtovoy@nvidia.com;
> Linuxarm <linuxarm@huawei.com>; liulongfang <liulongfang@huawei.com>;
> Zengtao (B) <prime.zeng@hisilicon.com>; yuzenghui
> <yuzenghui@huawei.com>; Jonathan Cameron
> <jonathan.cameron@huawei.com>; Wangzhou (B) <wangzhou1@hisilicon.com>
> Subject: Re: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon
> ACC devices
> 
> On Fri, 2 Jul 2021 10:58:46 +0100
> Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> wrote:
> 
> > 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
> 
> The device table suggests only VFs are supported by this driver, so it
> really shouldn't need sriov_configure support, right?  Thanks,

Right. Only VFs are supported. I will remove this.

Thanks,
Shameer

> 
> Alex
> 
> > +	.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");


  reply	other threads:[~2021-07-05  7:20 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 ` [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices Shameer Kolothum
2021-07-02 20:29   ` Alex Williamson
2021-07-05  7:20     ` Shameerali Kolothum Thodi [this message]
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

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