iommu: Move report_iommu_fault() to iommu.c
The function is in no fast-path, there is no need for it to
be static inline in a header file. This also removes the
need to include iommu trace-points in iommu.h.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Git-commit: 207c6e36f122ebb1164d611c9f34f128313f47d5
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I73967268e951747c3d66e19da895beb44ff5569f
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 83cbf20..f15107b 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1519,8 +1519,49 @@
}
EXPORT_SYMBOL_GPL(iommu_domain_window_disable);
-struct dentry *iommu_debugfs_top;
+/**
+ * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
+ * @domain: the iommu domain where the fault has happened
+ * @dev: the device where the fault has happened
+ * @iova: the faulting address
+ * @flags: mmu fault flags (e.g. IOMMU_FAULT_READ/IOMMU_FAULT_WRITE/...)
+ *
+ * This function should be called by the low-level IOMMU implementations
+ * whenever IOMMU faults happen, to allow high-level users, that are
+ * interested in such events, to know about them.
+ *
+ * This event may be useful for several possible use cases:
+ * - mere logging of the event
+ * - dynamic TLB/PTE loading
+ * - if restarting of the faulting device is required
+ *
+ * Returns 0 on success and an appropriate error code otherwise (if dynamic
+ * PTE/TLB loading will one day be supported, implementations will be able
+ * to tell whether it succeeded or not according to this return value).
+ *
+ * Specifically, -ENOSYS is returned if a fault handler isn't installed
+ * (though fault handlers can also return -ENOSYS, in case they want to
+ * elicit the default behavior of the IOMMU drivers).
+ */
+int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
+ unsigned long iova, int flags)
+{
+ int ret = -ENOSYS;
+ /*
+ * if upper layers showed interest and installed a fault handler,
+ * invoke it.
+ */
+ if (domain->handler)
+ ret = domain->handler(domain, dev, iova, flags,
+ domain->handler_token);
+
+ trace_io_page_fault(dev, iova, flags);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(report_iommu_fault);
+
+struct dentry *iommu_debugfs_top;
static int __init iommu_init(void)
{
iommu_group_kset = kset_create_and_add("iommu_groups",