[RFC PATCH 4/4] ACPI: IORT: Add SMMUv3 MSI support

Hanjun Guo
2017-08-09T11:04:09Z

From: Hanjun Guo <hanjun.guo@linaro.org>

Since we have a mapping index for SMMUv3 MSI, we can
directly use that index to get the map entry, then
retrieve dev ID and ITS parent to add SMMUv3 MSI
support.

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
---
drivers/acpi/arm64/iort.c | 46 ++++++++++++++++++++++++++++++++++++----------
1 file changed, 36 insertions(+), 10 deletions(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 9439f02..ce03298 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -313,7 +313,8 @@ static int iort_id_map(struct acpi_iort_id_mapping *map, u8 type, u32 rid_in,
/* Single mapping does not care for input id */
if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (type == ACPI_IORT_NODE_NAMED_COMPONENT ||
- type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
+ type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX ||
+ type == ACPI_IORT_NODE_SMMU_V3) {
*rid_out = map->output_base;
return 0;
}
@@ -357,7 +358,8 @@ struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,

if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT ||
- node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
+ node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX ||
+ node->type == ACPI_IORT_NODE_SMMU_V3) {
*id_out = map->output_base;
return parent;
}
@@ -549,9 +551,21 @@ int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id)
if (!node)
return -ENODEV;

- for (i = 0; i < node->mapping_count; i++) {
- if (iort_node_map_platform_id(node, dev_id, IORT_MSI_TYPE, i))
+ if (node->type == ACPI_IORT_NODE_SMMU_V3) {
+ u32 index;
+
+ if (iort_get_smmu_v3_id_mapping_index(node, &index))
+ return -ENODEV;
+
+ if (iort_node_map_platform_id(node, dev_id, IORT_MSI_TYPE,
+ index))
return 0;
+ } else {
+ for (i = 0; i < node->mapping_count; i++) {
+ if (iort_node_map_platform_id(node, dev_id,
+ IORT_MSI_TYPE, i))
+ return 0;
+ }
}

return -ENODEV;
@@ -626,20 +640,30 @@ static struct irq_domain *iort_get_platform_device_domain(struct device *dev)
struct acpi_iort_node *node, *msi_parent;
struct fwnode_handle *iort_fwnode;
struct acpi_iort_its_group *its;
- int i;

/* find its associated iort node */
- node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
- iort_match_node_callback, dev);
+ node = iort_find_dev_node(dev);
if (!node)
return NULL;

/* then find its msi parent node */
- for (i = 0; i < node->mapping_count; i++) {
+ if (node->type == ACPI_IORT_NODE_SMMU_V3) {
+ u32 index;
+
+ if (iort_get_smmu_v3_id_mapping_index(node, &index))
+ return NULL;
+
msi_parent = iort_node_map_platform_id(node, NULL,
+ IORT_MSI_TYPE, index);
+ } else {
+ int i;
+
+ for (i = 0; i < node->mapping_count; i++) {
+ msi_parent = iort_node_map_platform_id(node, NULL,
IORT_MSI_TYPE, i);
- if (msi_parent)
- break;
+ if (msi_parent)
+ break;
+ }
}

if (!msi_parent)
@@ -1233,6 +1257,8 @@ static int __init iort_add_smmu_platform_device(struct acpi_iort_node *node)
/* Configure DMA for the page table walker */
acpi_dma_configure(&pdev->dev, attr);

+ acpi_configure_pmsi_domain(&pdev->dev);
+
ret = platform_device_add(pdev);
if (ret)
goto dma_deconfigure;
--
1.7.12.4