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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC 10/11] IORT parsing functions to prepare requesterId maps
From: Manish Jaggi <manish.jaggi@xxxxxxxxxx>
This patch adds functions to parse the IORT and use the requesterID public API
to update the maps.
Signed-off-by: Manish jaggi <manish.jaggi@xxxxxxxxxx>
---
xen/drivers/acpi/arm/iort.c | 200 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 200 insertions(+)
diff --git a/xen/drivers/acpi/arm/iort.c b/xen/drivers/acpi/arm/iort.c
index a47ee2df4c..00a9f18046 100644
--- a/xen/drivers/acpi/arm/iort.c
+++ b/xen/drivers/acpi/arm/iort.c
@@ -353,6 +353,205 @@ static inline struct fwnode_handle
*acpi_alloc_fwnode_static(void)
return fwnode;
}
+static inline bool __must_check IS_ERR_OR_NULL(__force const void *ptr)
+{
+ return unlikely(!ptr) || IS_ERR_VALUE((unsigned long)ptr);
+}
+
+static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
+{
+ return !IS_ERR_OR_NULL(fwnode) &&
+ fwnode->ops == &acpi_static_fwnode_ops;
+}
+
+static inline void acpi_free_fwnode_static(struct fwnode_handle *fwnode)
+{
+ if (WARN_ON(!is_acpi_static_node(fwnode)))
+ return;
+
+ kfree(fwnode);
+}
+int fixup_rid_deviceid_map(struct acpi_iort_node *inode,
+ struct acpi_iort_id_mapping *pci_idmap,
+ struct acpi_iort_node *smmu_node)
+{
+
+ unsigned int p_input_base, p_output_base, p_id_count;
+ unsigned int s_input_base, s_output_base, s_id_count;
+ unsigned int delta, i;
+ int ret = 0;
+ struct acpi_iort_id_mapping *smmu_idmap = NULL;
+ struct acpi_iort_node *its_node;
+ struct acpi_table_iort *iort;
+
+ iort = (struct acpi_table_iort*) iort_table;
+
+ p_input_base = pci_idmap->input_base;
+ p_output_base = pci_idmap->output_base;
+ p_id_count = pci_idmap->id_count;
+
+ smmu_idmap = (struct acpi_iort_id_mapping*) ((u8*) smmu_node +
+ smmu_node->mapping_offset);
+
+ for (i = 0; i < smmu_node->mapping_count; i++, smmu_idmap++) {
+ s_input_base = smmu_idmap->input_base;
+ s_output_base = smmu_idmap->output_base;
+ s_id_count = smmu_idmap->id_count;
+ its_node = ACPI_ADD_PTR(struct acpi_iort_node, iort,
+ smmu_idmap->output_reference);
+
+ if (s_input_base <= p_output_base) {
+ int count;
+ if (s_input_base + s_id_count < p_output_base)
+ continue;
+
+ delta = p_output_base - s_input_base;
+ count = s_input_base + s_id_count <= p_output_base +
+ p_id_count ? s_id_count - delta : p_id_count;
+
+ ret = add_rid_deviceid_map (inode, its_node,
+ p_input_base,
+ s_output_base + delta,
+ count);
+ if (ret)
+ return ret;
+ } else {
+ int count;
+ if (p_output_base + p_id_count < s_input_base)
+ continue;
+
+ delta = s_input_base - p_output_base;
+ count = s_input_base + s_id_count < p_output_base +
+ p_id_count ? s_id_count : p_id_count - delta;
+
+ ret = add_rid_deviceid_map (inode, its_node,
+ p_input_base + delta,
+ s_output_base, count);
+
+ if (ret)
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+void parse_pcirc_node(struct acpi_iort_node *iort_node)
+{
+ int j , ret;
+ struct acpi_iort_id_mapping *idmap;
+ struct acpi_iort_node *onode;
+ struct acpi_table_iort *iort;
+
+ iort = (struct acpi_table_iort*) iort_table;
+ idmap = ACPI_ADD_PTR(struct acpi_iort_id_mapping, iort_node,
+ iort_node->mapping_offset);
+
+ /* iterate over idmap */
+ for ( j = 0; j < iort_node->mapping_count; j++ ) {
+
+ struct acpi_iort_node *its_node;
+ struct acpi_iort_node *smmu_node;
+ onode = ACPI_ADD_PTR(struct acpi_iort_node, iort,
+ idmap->output_reference);
+
+ switch (onode->type) {
+ case ACPI_IORT_NODE_ITS_GROUP:
+
+ its_node = ACPI_ADD_PTR(struct acpi_iort_node,
iort,
+
idmap->output_reference);
+
+ ret = add_rid_deviceid_map(iort_node, its_node,
+ idmap->input_base,
+ idmap->output_base,
+ idmap->id_count);
+ if (ret) {
+ pr_err("%s: add_rid_deviceid_map"
+ "failed with ret=%d \r\n",
+ __func__, ret);
+ break;
+ }
+ break;
+
+ case ACPI_IORT_NODE_SMMU:
+ case ACPI_IORT_NODE_SMMU_V3:
+
+ smmu_node = ACPI_ADD_PTR(
+ struct acpi_iort_node,
+ iort_table,
+ idmap->output_reference);
+
+ ret = add_rid_streamid_map(iort_node,
+ smmu_node,
+ idmap->input_base,
+ idmap->output_base,
+ idmap->id_count);
+ if (ret) {
+ pr_err("%s: add_rid_streamid_map"
+ "failed with ret=%d \r\n",
+ __func__, ret);
+ break;
+ }
+
+ ret = fixup_rid_deviceid_map(iort_node, idmap,
+ onode);
+ if (ret) {
+ pr_err("%s: fixup_rid_deviceid_map"
+ "failed with ret=%d \r\n",
+ __func__, ret);
+ break;
+ }
+ break;
+ }
+ idmap++;
+ }
+}
+
+void parse_smmu_node(struct acpi_iort_node *iort_node)
+{
+ int ret;
+ struct fwnode_handle *fwnode;
+ fwnode = acpi_alloc_fwnode_static();
+ if (!fwnode)
+ return;
+
+ iort_set_fwnode(iort_node, fwnode);
+ ret = iort_add_smmu_platform_device(iort_node);
+ if (ret)
+ acpi_free_fwnode_static(fwnode);
+}
+
+void parse_iort(void)
+{
+ struct acpi_iort_node *iort_node, *iort_end;
+ struct acpi_table_iort *iort;
+ int i;
+
+ iort = (struct acpi_table_iort*) iort_table;
+ iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort,
+ iort->node_offset);
+ iort_end = ACPI_ADD_PTR(struct acpi_iort_node, iort,
+ iort->header.length);
+ init_ridmaps();
+
+ for (i = 0; i < iort->node_count; i++) {
+ if ( iort_node >= iort_end ) {
+ pr_err("iort node pointer overflows, bad table\n");
+ return;
+ }
+
+ if ( iort_node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX )
+ parse_pcirc_node(iort_node);
+ else if ( (iort_node->type == ACPI_IORT_NODE_SMMU ||
+ iort_node->type == ACPI_IORT_NODE_SMMU_V3) )
+ parse_smmu_node(iort_node);
+
+ iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node,
+ iort_node->length);
+ }
+}
+
+
void __init acpi_iort_init(void)
{
acpi_status status;
@@ -366,4 +565,5 @@ void __init acpi_iort_init(void)
}
return;
}
+ parse_iort();
}
--
2.14.1
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