| Message ID | 20220302172903.1995-5-shameerali.kolothum.thodi@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vfio/hisilicon: add ACC live migration driver | expand |
On 02/03/2022 17:28, Shameer Kolothum wrote: > +config HISI_ACC_VFIO_PCI > + tristate "VFIO PCI support for HiSilicon ACC devices" > + depends on (ARM64 && VFIO_PCI_CORE) || (COMPILE_TEST && 64BIT) This means that we will have HISI_ACC_VFIO_PCI=y for COMPILE_TEST=y and 64BIT=y and VFIO_PCI_CORE=n, but ... > + help > + This provides generic PCI support for HiSilicon ACC devices > + using the VFIO framework. > + > + If you don't know what to do here, say N. > diff --git a/drivers/vfio/pci/hisilicon/Makefile b/drivers/vfio/pci/hisilicon/Makefile > new file mode 100644 > index 000000000000..c66b3783f2f9 > --- /dev/null > +++ b/drivers/vfio/pci/hisilicon/Makefile > @@ -0,0 +1,4 @@ > +# SPDX-License-Identifier: GPL-2.0-only > +obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o > +hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o > + > diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c > new file mode 100644 > index 000000000000..8129c3457b3b > --- /dev/null > +++ b/drivers/vfio/pci/hisilicon/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/hisi_acc_qm.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_device(struct vfio_device *core_vdev) > +{ > + struct vfio_pci_core_device *vdev = > + container_of(core_vdev, struct vfio_pci_core_device, vdev); > + int ret; > + > + ret = vfio_pci_core_enable(vdev); > + if (ret) > + return ret; > + > + vfio_pci_core_finish_enable(vdev); ... there does not seem to be a stub for vfio_pci_core_finish_enable(), so I don't think that we compile under the conditions described. I think that HISI_ACC_VFIO_PCI should always depends on HISI_ACC_VFIO_PCI > + > + return 0; > +}
> -----Original Message----- > From: John Garry > Sent: 02 March 2022 19:03 > To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>; > kvm@vger.kernel.org; linux-kernel@vger.kernel.org; > linux-crypto@vger.kernel.org > Cc: linux-pci@vger.kernel.org; alex.williamson@redhat.com; jgg@nvidia.com; > cohuck@redhat.com; mgurtovoy@nvidia.com; yishaih@nvidia.com; Linuxarm > <linuxarm@huawei.com>; liulongfang <liulongfang@huawei.com>; Zengtao (B) > <prime.zeng@hisilicon.com>; Jonathan Cameron > <jonathan.cameron@huawei.com>; Wangzhou (B) <wangzhou1@hisilicon.com> > Subject: Re: [PATCH v7 04/10] hisi_acc_vfio_pci: add new vfio_pci driver for > HiSilicon ACC devices > > On 02/03/2022 17:28, Shameer Kolothum wrote: > > +config HISI_ACC_VFIO_PCI > > + tristate "VFIO PCI support for HiSilicon ACC devices" > > + depends on (ARM64 && VFIO_PCI_CORE) || (COMPILE_TEST && 64BIT) > > This means that we will have HISI_ACC_VFIO_PCI=y for COMPILE_TEST=y and > 64BIT=y and VFIO_PCI_CORE=n, but ... > > > + help > > + This provides generic PCI support for HiSilicon ACC devices > > + using the VFIO framework. > > + > > + If you don't know what to do here, say N. > > diff --git a/drivers/vfio/pci/hisilicon/Makefile > b/drivers/vfio/pci/hisilicon/Makefile > > new file mode 100644 > > index 000000000000..c66b3783f2f9 > > --- /dev/null > > +++ b/drivers/vfio/pci/hisilicon/Makefile > > @@ -0,0 +1,4 @@ > > +# SPDX-License-Identifier: GPL-2.0-only > > +obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o > > +hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o > > + > > diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c > b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c > > new file mode 100644 > > index 000000000000..8129c3457b3b > > --- /dev/null > > +++ b/drivers/vfio/pci/hisilicon/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/hisi_acc_qm.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_device(struct vfio_device *core_vdev) > > +{ > > + struct vfio_pci_core_device *vdev = > > + container_of(core_vdev, struct vfio_pci_core_device, vdev); > > + int ret; > > + > > + ret = vfio_pci_core_enable(vdev); > > + if (ret) > > + return ret; > > + > > + vfio_pci_core_finish_enable(vdev); > > ... there does not seem to be a stub for vfio_pci_core_finish_enable(), > so I don't think that we compile under the conditions described. I think > that HISI_ACC_VFIO_PCI should always depends on HISI_ACC_VFIO_PCI > That looks right. I do remember running a compile test with x86_64. May be VFIO_PCI_CORE was somehow selected. I will make the "depends on VFIO_PCI_CORE" common. Thanks, Shameer
diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 187b9c259944..4da1914425e1 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -46,4 +46,6 @@ endif source "drivers/vfio/pci/mlx5/Kconfig" +source "drivers/vfio/pci/hisilicon/Kconfig" + endif diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index ed9d6f2e0555..7052ebd893e0 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -9,3 +9,5 @@ vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o obj-$(CONFIG_VFIO_PCI) += vfio-pci.o obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5/ + +obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisilicon/ diff --git a/drivers/vfio/pci/hisilicon/Kconfig b/drivers/vfio/pci/hisilicon/Kconfig new file mode 100644 index 000000000000..d5acaf74a878 --- /dev/null +++ b/drivers/vfio/pci/hisilicon/Kconfig @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +config HISI_ACC_VFIO_PCI + tristate "VFIO PCI support for HiSilicon ACC devices" + depends on (ARM64 && VFIO_PCI_CORE) || (COMPILE_TEST && 64BIT) + help + This provides generic PCI support for HiSilicon ACC devices + using the VFIO framework. + + If you don't know what to do here, say N. diff --git a/drivers/vfio/pci/hisilicon/Makefile b/drivers/vfio/pci/hisilicon/Makefile new file mode 100644 index 000000000000..c66b3783f2f9 --- /dev/null +++ b/drivers/vfio/pci/hisilicon/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o +hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o + diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c new file mode 100644 index 000000000000..8129c3457b3b --- /dev/null +++ b/drivers/vfio/pci/hisilicon/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/hisi_acc_qm.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_device(struct vfio_device *core_vdev) +{ + struct vfio_pci_core_device *vdev = + container_of(core_vdev, struct vfio_pci_core_device, vdev); + int ret; + + 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_device = hisi_acc_vfio_pci_open_device, + .close_device = vfio_pci_core_close_device, + .ioctl = vfio_pci_core_ioctl, + .device_feature = vfio_pci_core_ioctl_feature, + .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, +}; + +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; + + vfio_pci_core_init_device(vdev, pdev, &hisi_acc_vfio_pci_ops); + + ret = vfio_pci_core_register_device(vdev); + if (ret) + goto out_free; + + dev_set_drvdata(&pdev->dev, vdev); + + return 0; + +out_free: + vfio_pci_core_uninit_device(vdev); + 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); + vfio_pci_core_uninit_device(vdev); + kfree(vdev); +} + +static const struct pci_device_id hisi_acc_vfio_pci_table[] = { + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_SEC_VF) }, + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_HPRE_VF) }, + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_ZIP_VF) }, + { } +}; + +MODULE_DEVICE_TABLE(pci, hisi_acc_vfio_pci_table); + +static struct pci_driver hisi_acc_vfio_pci_driver = { + .name = KBUILD_MODNAME, + .id_table = hisi_acc_vfio_pci_table, + .probe = hisi_acc_vfio_pci_probe, + .remove = hisi_acc_vfio_pci_remove, + .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");
Add a vendor-specific vfio_pci driver for HiSilicon ACC devices. This will be extended in subsequent patches to add support for VFIO live migration feature. Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> --- drivers/vfio/pci/Kconfig | 2 + drivers/vfio/pci/Makefile | 2 + drivers/vfio/pci/hisilicon/Kconfig | 9 ++ drivers/vfio/pci/hisilicon/Makefile | 4 + .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 100 ++++++++++++++++++ 5 files changed, 117 insertions(+) create mode 100644 drivers/vfio/pci/hisilicon/Kconfig create mode 100644 drivers/vfio/pci/hisilicon/Makefile create mode 100644 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c