APU IOMMU is a new iommu HW. it use a new pagetable.
Add support for mt8192 apu iommu.
Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
Signed-off-by: Flora Fu <flora.fu@xxxxxxxxxxxx>
---
drivers/iommu/mtk_iommu.c | 57 +++++++++++++++++++
include/dt-bindings/memory/mt8192-larb-port.h | 4 ++
2 files changed, 61 insertions(+)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 90be8ebbc98a..a5f8f19e053a 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -133,6 +133,7 @@
/* 2 bits: iommu type */
#define MTK_IOMMU_TYPE_MM (0x0 << 13)
#define MTK_IOMMU_TYPE_INFRA (0x1 << 13)
+#define MTK_IOMMU_TYPE_APU (0x2 << 13)
#define MTK_IOMMU_TYPE_MASK (0x3 << 13)
#define IFA_IOMMU_PCIe_SUPPORT BIT(15)
@@ -185,6 +186,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data, unsigned int ban
#define MTK_IOMMU_4GB_MODE_REMAP_BASE 0x140000000UL
static LIST_HEAD(m4ulist); /* List all the M4U HWs */
+static LIST_HEAD(apulist); /* List the apu iommu HWs */
#define for_each_m4u(data, head) list_for_each_entry(data, head, list)
@@ -209,6 +211,13 @@ static const struct mtk_iommu_iova_region mt8192_multi_dom[] = {
#endif
};
+static const struct mtk_iommu_iova_region mt8192_multi_dom_apu[] = {
+ { .iova_base = 0x0, .size = SZ_4G}, /* APU DATA */
+ { .iova_base = 0x4000000ULL, .size = 0x4000000}, /* APU VLM */
+ { .iova_base = 0x10000000ULL, .size = 0x10000000}, /* APU VPU */
+ { .iova_base = 0x70000000ULL, .size = 0x12600000}, /* APU REG */
+};
+
/* If 2 M4U share a domain(use the same hwlist), Put the corresponding info in first data.*/
static struct mtk_iommu_data *mtk_iommu_get_frst_data(struct list_head *hwlist)
{
@@ -923,6 +932,37 @@ static int mtk_iommu_mm_dts_parse(struct device *dev,
return 0;
}
+static int mtk_iommu_apu_prepare(struct device *dev)
+{
+ struct device_node *apupower_node;
+ struct platform_device *apudev;
+ struct device_link *link;
+
+ apupower_node = of_find_compatible_node(NULL, NULL, "mediatek,apusys-power");
+ if (!apupower_node) {
+ dev_warn(dev, "Can't find apu power node!\n");
+ return -EINVAL;
+ }
+
+ if (!of_device_is_available(apupower_node)) {
+ of_node_put(apupower_node);
+ return -EPERM;
+ }
+
+ apudev = of_find_device_by_node(apupower_node);
+ if (!apudev) {
+ of_node_put(apupower_node);
+ return -EPROBE_DEFER;
+ }
+
+ link = device_link_add(&apudev->dev, dev, DL_FLAG_PM_RUNTIME);
+ if (!link)
+ dev_err(dev, "Unable link %s.\n", apudev->name);
+
+ of_node_put(apupower_node);
+ return 0;
+}
+
static int mtk_iommu_probe(struct platform_device *pdev)
{
struct mtk_iommu_data *data;
@@ -1021,6 +1061,10 @@ static int mtk_iommu_probe(struct platform_device *pdev)
}
data->pericfg = infracfg;
+ } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_APU)) {
+ ret = mtk_iommu_apu_prepare(dev);
+ if (ret)
+ goto out_runtime_disable;
}
platform_set_drvdata(pdev, data);
@@ -1268,6 +1312,18 @@ static const struct mtk_iommu_plat_data mt8192_data = {
{0, 14, 16}, {0, 13, 18, 17}},
};
+static const struct mtk_iommu_plat_data mt8192_data_apu = {
+ .m4u_plat = M4U_MT8192,
+ .flags = WR_THROT_EN | DCM_DISABLE | MTK_IOMMU_TYPE_APU |
+ SHARE_PGTABLE,
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
+ .hw_list = &apulist,
+ .bank_nr = 1,
+ .bank_enable = {true},
+ .iova_region = mt8192_multi_dom_apu,
+ .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom_apu),
+};
+
static const struct mtk_iommu_plat_data mt8195_data_infra = {
.m4u_plat = M4U_MT8195,
.flags = WR_THROT_EN | DCM_DISABLE |
@@ -1323,6 +1379,7 @@ static const struct of_device_id mtk_iommu_of_ids[] = {
{ .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
{ .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
{ .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data},
+ { .compatible = "mediatek,mt8192-iommu-apu", .data = &mt8192_data_apu},
{ .compatible = "mediatek,mt8195-iommu-infra", .data = &mt8195_data_infra},
{ .compatible = "mediatek,mt8195-iommu-vdo", .data = &mt8195_data_vdo},
{ .compatible = "mediatek,mt8195-iommu-vpp", .data = &mt8195_data_vpp},
diff --git a/include/dt-bindings/memory/mt8192-larb-port.h b/include/dt-bindings/memory/mt8192-larb-port.h
index 23035a52c675..908d6831bf99 100644
--- a/include/dt-bindings/memory/mt8192-larb-port.h
+++ b/include/dt-bindings/memory/mt8192-larb-port.h
@@ -240,4 +240,8 @@
#define M4U_PORT_L20_IPE_RSC_RDMA0 MTK_M4U_ID(20, 4)
#define M4U_PORT_L20_IPE_RSC_WDMA MTK_M4U_ID(20, 5)
+#define IOMMU_PORT_APU_DATA MTK_M4U_ID(0, 0)
+#define IOMMU_PORT_APU_VLM MTK_M4U_ID(0, 1)
+#define IOMMU_PORT_APU_VPU MTK_M4U_ID(0, 2)
+
#endif
--
2.18.0
