+++ /dev/null
-From aa8dac23408e24432f7d6c404cddc8997a142bd6 Mon Sep 17 00:00:00 2001
-From: Diana Craciun <diana.craciun@nxp.com>
-Date: Mon, 30 Sep 2019 11:56:35 +0300
-Subject: [PATCH] vfio/fsl-mc: Add irq infrastructure for fsl-mc devices
-
-This patch adds the skeleton for interrupt support
-for fsl-mc devices. The interrupts are not yet functional,
-the functionality will be added by subsequent patches.
-
-Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
-Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
----
- drivers/vfio/fsl-mc/Makefile | 2 +-
- drivers/vfio/fsl-mc/vfio_fsl_mc.c | 71 ++++++++++++++++++++++++++++++-
- drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c | 62 +++++++++++++++++++++++++++
- drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | 5 +++
- 4 files changed, 137 insertions(+), 3 deletions(-)
- create mode 100644 drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c
-
---- a/drivers/vfio/fsl-mc/Makefile
-+++ b/drivers/vfio/fsl-mc/Makefile
-@@ -1,2 +1,2 @@
- vfio-fsl_mc-y := vfio_fsl_mc.o
--obj-$(CONFIG_VFIO_FSL_MC) += vfio_fsl_mc.o
-+obj-$(CONFIG_VFIO_FSL_MC) += vfio_fsl_mc.o vfio_fsl_mc_intr.o
---- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
-+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
-@@ -208,11 +208,75 @@ static long vfio_fsl_mc_ioctl(void *devi
- }
- case VFIO_DEVICE_GET_IRQ_INFO:
- {
-- return -EINVAL;
-+ struct vfio_irq_info info;
-+
-+ minsz = offsetofend(struct vfio_irq_info, count);
-+ if (copy_from_user(&info, (void __user *)arg, minsz))
-+ return -EFAULT;
-+
-+ if (info.argsz < minsz)
-+ return -EINVAL;
-+
-+ if (info.index >= mc_dev->obj_desc.irq_count)
-+ return -EINVAL;
-+
-+ info.flags = VFIO_IRQ_INFO_EVENTFD;
-+ info.count = 1;
-+
-+ return copy_to_user((void __user *)arg, &info, minsz);
- }
- case VFIO_DEVICE_SET_IRQS:
- {
-- return -EINVAL;
-+ struct vfio_irq_set hdr;
-+ u8 *data = NULL;
-+ int ret = 0;
-+
-+ minsz = offsetofend(struct vfio_irq_set, count);
-+
-+ if (copy_from_user(&hdr, (void __user *)arg, minsz))
-+ return -EFAULT;
-+
-+ if (hdr.argsz < minsz)
-+ return -EINVAL;
-+
-+ if (hdr.index >= mc_dev->obj_desc.irq_count)
-+ return -EINVAL;
-+
-+ if (hdr.start != 0 || hdr.count > 1)
-+ return -EINVAL;
-+
-+ if (hdr.count == 0 &&
-+ (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE) ||
-+ !(hdr.flags & VFIO_IRQ_SET_ACTION_TRIGGER)))
-+ return -EINVAL;
-+
-+ if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK |
-+ VFIO_IRQ_SET_ACTION_TYPE_MASK))
-+ return -EINVAL;
-+
-+ if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
-+ size_t size;
-+
-+ if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL)
-+ size = sizeof(uint8_t);
-+ else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD)
-+ size = sizeof(int32_t);
-+ else
-+ return -EINVAL;
-+
-+ if (hdr.argsz - minsz < hdr.count * size)
-+ return -EINVAL;
-+
-+ data = memdup_user((void __user *)(arg + minsz),
-+ hdr.count * size);
-+ if (IS_ERR(data))
-+ return PTR_ERR(data);
-+ }
-+
-+ ret = vfio_fsl_mc_set_irqs_ioctl(vdev, hdr.flags,
-+ hdr.index, hdr.start,
-+ hdr.count, data);
-+ return ret;
- }
- case VFIO_DEVICE_RESET:
- {
-@@ -304,6 +368,9 @@ static int vfio_fsl_mc_init_device(struc
- int ret = 0;
- unsigned int irq_count;
-
-+ /* innherit the msi domain from parent */
-+ dev_set_msi_domain(&mc_dev->dev, dev_get_msi_domain(mc_dev->dev.parent));
-+
- /* Non-dprc devices share mc_io from parent */
- if (!is_fsl_mc_bus_dprc(mc_dev)) {
- struct fsl_mc_device *mc_cont = to_fsl_mc_device(mc_dev->dev.parent);
---- /dev/null
-+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c
-@@ -0,0 +1,62 @@
-+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
-+/*
-+ * Copyright 2013-2016 Freescale Semiconductor Inc.
-+ * Copyright 2019 NXP
-+ */
-+
-+#include <linux/vfio.h>
-+#include <linux/slab.h>
-+#include <linux/types.h>
-+#include <linux/eventfd.h>
-+#include <linux/msi.h>
-+
-+#include "linux/fsl/mc.h"
-+#include "vfio_fsl_mc_private.h"
-+
-+static int vfio_fsl_mc_irq_mask(struct vfio_fsl_mc_device *vdev,
-+ unsigned int index, unsigned int start,
-+ unsigned int count, uint32_t flags,
-+ void *data)
-+{
-+ return -EINVAL;
-+}
-+
-+static int vfio_fsl_mc_irq_unmask(struct vfio_fsl_mc_device *vdev,
-+ unsigned int index, unsigned int start,
-+ unsigned int count, uint32_t flags,
-+ void *data)
-+{
-+ return -EINVAL;
-+}
-+
-+static int vfio_fsl_mc_set_irq_trigger(struct vfio_fsl_mc_device *vdev,
-+ unsigned int index, unsigned int start,
-+ unsigned int count, uint32_t flags,
-+ void *data)
-+{
-+ return -EINVAL;
-+}
-+int vfio_fsl_mc_set_irqs_ioctl(struct vfio_fsl_mc_device *vdev,
-+ uint32_t flags, unsigned int index,
-+ unsigned int start, unsigned int count,
-+ void *data)
-+{
-+ int ret = -ENOTTY;
-+
-+ switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
-+ case VFIO_IRQ_SET_ACTION_MASK:
-+ ret = vfio_fsl_mc_irq_mask(vdev, index, start, count,
-+ flags, data);
-+ break;
-+ case VFIO_IRQ_SET_ACTION_UNMASK:
-+ ret = vfio_fsl_mc_irq_unmask(vdev, index, start, count,
-+ flags, data);
-+ break;
-+ case VFIO_IRQ_SET_ACTION_TRIGGER:
-+ ret = vfio_fsl_mc_set_irq_trigger(vdev, index, start,
-+ count, flags, data);
-+ break;
-+ }
-+
-+ return ret;
-+}
---- a/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h
-+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h
-@@ -35,4 +35,9 @@ struct vfio_fsl_mc_device {
- struct vfio_fsl_mc_reflck *reflck;
- };
-
-+int vfio_fsl_mc_set_irqs_ioctl(struct vfio_fsl_mc_device *vdev,
-+ uint32_t flags, unsigned int index,
-+ unsigned int start, unsigned int count,
-+ void *data);
-+
- #endif /* VFIO_PCI_PRIVATE_H */
projects / openwrt / staging / chunkeey.git / blobdiff