lkml.org 
[lkml]   [2021]   [Jul]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices
    Date
    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
    \
     
     \ /
      Last update: 2021-07-02 12:00    [W:5.961 / U:0.088 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site