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@xxxxxxxxxx>
---
drivers/vfio/pci/Kconfig | 9 +++
drivers/vfio/pci/Makefile | 3 +
drivers/vfio/pci/hisi_acc_vfio_pci.c | 99 ++++++++++++++++++++++++++++
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 860424ccda1b..4fed27fa413d 100644
--- a/drivers/vfio/pci/Kconfig
+++ b/drivers/vfio/pci/Kconfig
@@ -43,4 +43,13 @@ config VFIO_PCI_IGD
To enable Intel IGD assignment through vfio-pci, say Y.
endif
+
+config HISI_ACC_VFIO_PCI
+ tristate "VFIO PCI support for HiSilicon ACC devices"
+ depends on ARM64 && VFIO_PCI_CORE
+ 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.
endif
diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile
index 349d68d242b4..9d90b036cce6 100644
--- a/drivers/vfio/pci/Makefile
+++ b/drivers/vfio/pci/Makefile
@@ -7,3 +7,6 @@ obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o
vfio-pci-y := vfio_pci.o
vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o
obj-$(CONFIG_VFIO_PCI) += vfio-pci.o
+
+hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o
+obj-$(CONFIG_HISI_ACC_VFIO_PCI) += 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..c847bc469644
--- /dev/null
+++ b/drivers/vfio/pci/hisi_acc_vfio_pci.c
@@ -0,0 +1,99 @@
+// 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,
+ .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, SEC_VF_PCI_DEVICE_ID) },
+ { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, HPRE_VF_PCI_DEVICE_ID) },
+ { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, ZIP_VF_PCI_DEVICE_ID) },
+ { 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,
+ .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
