On 2016/9/13 16:24, Lorenzo Pieralisi wrote:
On Tue, Sep 13, 2016 at 04:15:31PM +0800, Hanjun Guo wrote:
[...]
+static acpi_status __init iort_match_iommu_callback(struct
acpi_iort_node *node,
+ void *context)
+{
+ int ret;
+ struct fwnode_handle *fwnode;
+
+ fwnode = iort_get_fwnode(node);
+
+ if (!fwnode)
+ return AE_NOT_FOUND;
+
+ ret = iort_add_smmu_platform_device(fwnode, node);
+ if (ret) {
+ pr_err("Error in platform device creation\n");
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+}
+
+static void __init iort_smmu_init(void)
+{
+ iort_scan_node(ACPI_IORT_NODE_SMMU, iort_match_iommu_callback,
NULL);
+ iort_scan_node(ACPI_IORT_NODE_SMMU_V3, iort_match_iommu_callback,
NULL);
Since iort_scan_node() returns after the first successful match it finds,
only the first SMMU_V3 in my IORT is being enumerated. I think you need
to go back to the "iterator" like approach you had been using or make
iort_match_iommu_callback() always return a non-AE_OK value so the scan
continues and has a chance to visit all of the SMMU_V3 nodes.
Please use the updated version of IORT patch (aka Tomasz's v11)
then things will work fine.
Nate is right, I was too keen on using iort_scan_node(), it does
not really work here (unless as he said I return a value !AE_OK in
the callback, which is horrible), I reverted back to the iterator
approach and I can push out a fixed up branch if useful before next
posting.
Ah, sorry, I just noticed "the first SMMU_V3" which is pretty similar
with the second problem which is noticed by Nate...
Thanks
Hanjun
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