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@xxxxxxxxxx>
---
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@xxxxxxxxxx>");
+MODULE_AUTHOR("Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx>");
+MODULE_DESCRIPTION("HiSilicon VFIO PCI - Generic VFIO PCI driver for HiSilicon ACC device family");
--
2.17.1
