vfio: Move vfio_spapr_iommu_eeh_ioctl into vfio_iommu_spapr_tce.c

As with the previous patch EEH is always enabled if SPAPR_TCE_IOMMU, so
move this last bit of code into the main module.

Now that this function only processes VFIO_EEH_PE_OP remove a level of
indenting as well, it is only called by a case statement that already
checked VFIO_EEH_PE_OP.

This eliminates an unnecessary module and SPAPR code in a global header.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/3-v5-fc5346cacfd4+4c482-vfio_modules_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

drivers/vfio/Makefile

@@ -10,7 +10,6 @@ vfio-y += vfio_main.o \
 obj-$(CONFIG_VFIO_VIRQFD) += vfio_virqfd.o
 obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o
 obj-$(CONFIG_VFIO_IOMMU_SPAPR_TCE) += vfio_iommu_spapr_tce.o
-obj-$(CONFIG_VFIO_SPAPR_EEH) += vfio_spapr_eeh.o
 obj-$(CONFIG_VFIO_PCI) += pci/
 obj-$(CONFIG_VFIO_PLATFORM) += platform/
 obj-$(CONFIG_VFIO_MDEV) += mdev/

drivers/vfio/vfio_iommu_spapr_tce.c

@@ -4,6 +4,7 @@
  *
  * Copyright (C) 2013 IBM Corp.  All rights reserved.
  *     Author: Alexey Kardashevskiy <aik@ozlabs.ru>
+ * Copyright Gavin Shan, IBM Corporation 2014.
  *
  * Derived from original vfio_iommu_type1.c:
  * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
@@ -773,6 +774,57 @@ static long tce_iommu_create_default_window(struct tce_container *container)
 	return ret;
 }
 
+static long vfio_spapr_ioctl_eeh_pe_op(struct iommu_group *group,
+				       unsigned long arg)
+{
+	struct eeh_pe *pe;
+	struct vfio_eeh_pe_op op;
+	unsigned long minsz;
+
+	pe = eeh_iommu_group_to_pe(group);
+	if (!pe)
+		return -ENODEV;
+
+	minsz = offsetofend(struct vfio_eeh_pe_op, op);
+	if (copy_from_user(&op, (void __user *)arg, minsz))
+		return -EFAULT;
+	if (op.argsz < minsz || op.flags)
+		return -EINVAL;
+
+	switch (op.op) {
+	case VFIO_EEH_PE_DISABLE:
+		return eeh_pe_set_option(pe, EEH_OPT_DISABLE);
+	case VFIO_EEH_PE_ENABLE:
+		return eeh_pe_set_option(pe, EEH_OPT_ENABLE);
+	case VFIO_EEH_PE_UNFREEZE_IO:
+		return eeh_pe_set_option(pe, EEH_OPT_THAW_MMIO);
+	case VFIO_EEH_PE_UNFREEZE_DMA:
+		return eeh_pe_set_option(pe, EEH_OPT_THAW_DMA);
+	case VFIO_EEH_PE_GET_STATE:
+		return eeh_pe_get_state(pe);
+		break;
+	case VFIO_EEH_PE_RESET_DEACTIVATE:
+		return eeh_pe_reset(pe, EEH_RESET_DEACTIVATE, true);
+	case VFIO_EEH_PE_RESET_HOT:
+		return eeh_pe_reset(pe, EEH_RESET_HOT, true);
+	case VFIO_EEH_PE_RESET_FUNDAMENTAL:
+		return eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL, true);
+	case VFIO_EEH_PE_CONFIGURE:
+		return eeh_pe_configure(pe);
+	case VFIO_EEH_PE_INJECT_ERR:
+		minsz = offsetofend(struct vfio_eeh_pe_op, err.mask);
+		if (op.argsz < minsz)
+			return -EINVAL;
+		if (copy_from_user(&op, (void __user *)arg, minsz))
+			return -EFAULT;
+
+		return eeh_pe_inject_err(pe, op.err.type, op.err.func,
+					 op.err.addr, op.err.mask);
+	default:
+		return -EINVAL;
+	}
+}
+
 static long tce_iommu_ioctl(void *iommu_data,
 				 unsigned int cmd, unsigned long arg)
 {
@@ -1044,8 +1096,7 @@ static long tce_iommu_ioctl(void *iommu_data,
 
 		ret = 0;
 		list_for_each_entry(tcegrp, &container->group_list, next) {
-			ret = vfio_spapr_iommu_eeh_ioctl(tcegrp->grp,
+			ret = vfio_spapr_ioctl_eeh_pe_op(tcegrp->grp, arg);
-					cmd, arg);
 			if (ret)
 				return ret;
 		}

drivers/vfio/vfio_spapr_eeh.c

@@ -1,88 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * EEH functionality support for VFIO devices. The feature is only
- * available on sPAPR compatible platforms.
- *
- * Copyright Gavin Shan, IBM Corporation 2014.
- */
-
-#include <linux/module.h>
-#include <linux/uaccess.h>
-#include <linux/vfio.h>
-#include <asm/eeh.h>
-
-#define DRIVER_VERSION	"0.1"
-#define DRIVER_AUTHOR	"Gavin Shan, IBM Corporation"
-#define DRIVER_DESC	"VFIO IOMMU SPAPR EEH"
-
-long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
-				unsigned int cmd, unsigned long arg)
-{
-	struct eeh_pe *pe;
-	struct vfio_eeh_pe_op op;
-	unsigned long minsz;
-	long ret = -EINVAL;
-
-	switch (cmd) {
-	case VFIO_EEH_PE_OP:
-		pe = eeh_iommu_group_to_pe(group);
-		if (!pe)
-			return -ENODEV;
-
-		minsz = offsetofend(struct vfio_eeh_pe_op, op);
-		if (copy_from_user(&op, (void __user *)arg, minsz))
-			return -EFAULT;
-		if (op.argsz < minsz || op.flags)
-			return -EINVAL;
-
-		switch (op.op) {
-		case VFIO_EEH_PE_DISABLE:
-			ret = eeh_pe_set_option(pe, EEH_OPT_DISABLE);
-			break;
-		case VFIO_EEH_PE_ENABLE:
-			ret = eeh_pe_set_option(pe, EEH_OPT_ENABLE);
-			break;
-		case VFIO_EEH_PE_UNFREEZE_IO:
-			ret = eeh_pe_set_option(pe, EEH_OPT_THAW_MMIO);
-			break;
-		case VFIO_EEH_PE_UNFREEZE_DMA:
-			ret = eeh_pe_set_option(pe, EEH_OPT_THAW_DMA);
-			break;
-		case VFIO_EEH_PE_GET_STATE:
-			ret = eeh_pe_get_state(pe);
-			break;
-		case VFIO_EEH_PE_RESET_DEACTIVATE:
-			ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE, true);
-			break;
-		case VFIO_EEH_PE_RESET_HOT:
-			ret = eeh_pe_reset(pe, EEH_RESET_HOT, true);
-			break;
-		case VFIO_EEH_PE_RESET_FUNDAMENTAL:
-			ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL, true);
-			break;
-		case VFIO_EEH_PE_CONFIGURE:
-			ret = eeh_pe_configure(pe);
-			break;
-		case VFIO_EEH_PE_INJECT_ERR:
-			minsz = offsetofend(struct vfio_eeh_pe_op, err.mask);
-			if (op.argsz < minsz)
-				return -EINVAL;
-			if (copy_from_user(&op, (void __user *)arg, minsz))
-				return -EFAULT;
-
-			ret = eeh_pe_inject_err(pe, op.err.type, op.err.func,
-						op.err.addr, op.err.mask);
-			break;
-		default:
-			ret = -EINVAL;
-		}
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(vfio_spapr_iommu_eeh_ioctl);
-
-MODULE_VERSION(DRIVER_VERSION);
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);

include/linux/vfio.h

@@ -233,18 +233,6 @@ int vfio_set_irqs_validate_and_prepare(struct vfio_irq_set *hdr,
 				       int num_irqs, int max_irq_type,
 				       size_t *data_size);
 
-#if IS_ENABLED(CONFIG_VFIO_SPAPR_EEH)
-long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group, unsigned int cmd,
-				unsigned long arg);
-#else
-static inline long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
-					      unsigned int cmd,
-					      unsigned long arg)
-{
-	return -ENOTTY;
-}
-#endif /* CONFIG_VFIO_SPAPR_EEH */
-
 /*
  * IRQfd - generic
  */