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Subject[PATCH 12/24] iommu/mediatek: Add IOMMU_TYPE flag
Date
This patch has no functional change, It only adds MM IOMMU_TYPE for
the previous SoC. All the current supported HW are for MM(multimedia)
engines.

In the mt8195, we have another IOMMU_TYPE: infra iommu, and there is
another APU_IOMMU, thus, use 2bits for the IOMMU_TYPE.

For the other IOMMU TYPEs, it doesn't have the "larb""port". thus, I use
the MM flag contain the MM_IOMMU special code, Also, it moves a big
chunk code about parsing the mediatek,larbs into a function, it only
needed for MM IOMMU.

this is preparing for supporting INFRA_IOMMU, and APU_IOMMU later.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
drivers/iommu/mtk_iommu.c | 202 ++++++++++++++++++++++----------------
1 file changed, 117 insertions(+), 85 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index b770cb5893b2..365732309486 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -128,9 +128,17 @@
#define SHARE_PGTABLE BIT(10) /* 2 HW share pgtable */
#define DCM_DISABLE BIT(11)
#define NOT_STD_AXI_MODE BIT(12)
+/* 2 bits: iommu type */
+#define MTK_IOMMU_TYPE_MM (0x0 << 13)
+#define MTK_IOMMU_TYPE_INFRA (0x1 << 13)
+#define MTK_IOMMU_TYPE_MASK (0x3 << 13)

-#define MTK_IOMMU_HAS_FLAG(pdata, _x) \
- ((((pdata)->flags) & (_x)) == (_x))
+#define MTK_IOMMU_HAS_FLAG(pdata, _x) (!!(((pdata)->flags) & (_x)))
+
+#define MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, mask) \
+ ((((pdata)->flags) & (mask)) == (_x))
+#define MTK_IOMMU_IS_TYPE(pdata, _x) MTK_IOMMU_HAS_FLAG_MASK(pdata, _x,\
+ MTK_IOMMU_TYPE_MASK)

struct mtk_iommu_domain {
struct io_pgtable_cfg cfg;
@@ -270,7 +278,7 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
{
struct mtk_iommu_data *data = dev_id;
struct mtk_iommu_domain *dom = data->m4u_dom;
- unsigned int fault_larb, fault_port, sub_comm = 0;
+ unsigned int fault_larb = 0, fault_port = 0, sub_comm = 0;
u32 int_state, regval, va34_32, pa34_32;
u64 fault_iova, fault_pa;
bool layer, write;
@@ -296,17 +304,19 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
fault_pa |= (u64)pa34_32 << 32;

- fault_port = F_MMU_INT_ID_PORT_ID(regval);
- if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM_2BITS)) {
- fault_larb = F_MMU_INT_ID_COMM_ID(regval);
- sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval);
- } else if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM_3BITS)) {
- fault_larb = F_MMU_INT_ID_COMM_ID_EXT(regval);
- sub_comm = F_MMU_INT_ID_SUB_COMM_ID_EXT(regval);
- } else {
- fault_larb = F_MMU_INT_ID_LARB_ID(regval);
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ fault_port = F_MMU_INT_ID_PORT_ID(regval);
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM_2BITS)) {
+ fault_larb = F_MMU_INT_ID_COMM_ID(regval);
+ sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval);
+ } else if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM_3BITS)) {
+ fault_larb = F_MMU_INT_ID_COMM_ID_EXT(regval);
+ sub_comm = F_MMU_INT_ID_SUB_COMM_ID_EXT(regval);
+ } else {
+ fault_larb = F_MMU_INT_ID_LARB_ID(regval);
+ }
+ fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm];
}
- fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm];

if (report_iommu_fault(&dom->domain, data->dev, fault_iova,
write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
@@ -370,19 +380,21 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
portid = MTK_M4U_TO_PORT(fwspec->ids[i]);

- larb_mmu = &data->larb_imu[larbid];
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ larb_mmu = &data->larb_imu[larbid];

- region = data->plat_data->iova_region + domid;
- larb_mmu->bank[portid] = upper_32_bits(region->iova_base);
+ region = data->plat_data->iova_region + domid;
+ larb_mmu->bank[portid] = upper_32_bits(region->iova_base);

- dev_dbg(dev, "%s iommu for larb(%s) port %d dom %d bank %d.\n",
- enable ? "enable" : "disable", dev_name(larb_mmu->dev),
- portid, domid, larb_mmu->bank[portid]);
+ dev_dbg(dev, "%s iommu for larb(%s) port %d dom %d bank %d.\n",
+ enable ? "enable" : "disable", dev_name(larb_mmu->dev),
+ portid, domid, larb_mmu->bank[portid]);

- if (enable)
- larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
- else
- larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
+ if (enable)
+ larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
+ else
+ larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
+ }
}
}

@@ -783,19 +795,75 @@ static const struct component_master_ops mtk_iommu_com_ops = {
.unbind = mtk_iommu_unbind,
};

+static int mtk_iommu_mm_dts_parse(struct device *dev,
+ struct component_match **match,
+ struct mtk_iommu_data *data)
+{
+ struct platform_device *plarbdev;
+ struct device_link *link;
+ struct device_node *larbnode, *smicomm_node;
+ int i, larb_nr, ret;
+
+ larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL);
+ if (larb_nr < 0)
+ return larb_nr;
+
+ for (i = 0; i < larb_nr; i++) {
+ u32 id;
+
+ larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
+ if (!larbnode)
+ return -EINVAL;
+
+ if (!of_device_is_available(larbnode)) {
+ of_node_put(larbnode);
+ continue;
+ }
+
+ ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id);
+ if (ret)/* The id is consecutive if there is no this property */
+ id = i;
+
+ plarbdev = of_find_device_by_node(larbnode);
+ if (!plarbdev) {
+ of_node_put(larbnode);
+ return -EPROBE_DEFER;
+ }
+ data->larb_imu[id].dev = &plarbdev->dev;
+
+ component_match_add_release(dev, match, release_of,
+ compare_of, larbnode);
+ }
+
+ /* Get smi-common dev from the last larb. */
+ smicomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
+ if (!smicomm_node)
+ return -EINVAL;
+
+ plarbdev = of_find_device_by_node(smicomm_node);
+ of_node_put(smicomm_node);
+ data->smicomm_dev = &plarbdev->dev;
+
+ link = device_link_add(data->smicomm_dev, dev,
+ DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
+
+ if (!link) {
+ dev_err(dev, "Unable link %s.\n", dev_name(data->smicomm_dev));
+ return PTR_ERR(link);
+ }
+ return 0;
+}
+
static int mtk_iommu_probe(struct platform_device *pdev)
{
struct mtk_iommu_data *data;
struct device *dev = &pdev->dev;
- struct device_node *larbnode, *smicomm_node;
- struct platform_device *plarbdev;
- struct device_link *link;
struct resource *res;
resource_size_t ioaddr;
struct component_match *match = NULL;
struct regmap *infracfg;
void *protect;
- int i, larb_nr, ret;
+ int ret;
u32 val;
char *p;

@@ -850,55 +918,12 @@ static int mtk_iommu_probe(struct platform_device *pdev)
return PTR_ERR(data->bclk);
}

- larb_nr = of_count_phandle_with_args(dev->of_node,
- "mediatek,larbs", NULL);
- if (larb_nr < 0)
- return larb_nr;
-
- for (i = 0; i < larb_nr; i++) {
- u32 id;
-
- larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
- if (!larbnode)
- return -EINVAL;
-
- if (!of_device_is_available(larbnode)) {
- of_node_put(larbnode);
- continue;
- }
-
- ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id);
- if (ret)/* The id is consecutive if there is no this property */
- id = i;
-
- plarbdev = of_find_device_by_node(larbnode);
- if (!plarbdev) {
- of_node_put(larbnode);
- return -EPROBE_DEFER;
- }
- data->larb_imu[id].dev = &plarbdev->dev;
-
- component_match_add_release(dev, &match, release_of,
- compare_of, larbnode);
- }
-
- /* Get smi-common dev from the last larb. */
- smicomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
- if (!smicomm_node)
- return -EINVAL;
-
- plarbdev = of_find_device_by_node(smicomm_node);
- of_node_put(smicomm_node);
- data->smicomm_dev = &plarbdev->dev;
-
pm_runtime_enable(dev);

- link = device_link_add(data->smicomm_dev, dev,
- DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
- if (!link) {
- dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev));
- ret = -EINVAL;
- goto out_runtime_disable;
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ ret = mtk_iommu_mm_dts_parse(dev, &match, data);
+ if (ret)
+ goto out_runtime_disable;
}

platform_set_drvdata(pdev, data);
@@ -929,9 +954,11 @@ static int mtk_iommu_probe(struct platform_device *pdev)
goto out_list_del;
}

- ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
- if (ret)
- goto out_bus_set_null;
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
+ if (ret)
+ goto out_bus_set_null;
+ }
return ret;

out_bus_set_null:
@@ -942,7 +969,8 @@ static int mtk_iommu_probe(struct platform_device *pdev)
out_sysfs_remove:
iommu_device_sysfs_remove(&data->iommu);
out_link_remove:
- device_link_remove(data->smicomm_dev, dev);
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM))
+ device_link_remove(data->smicomm_dev, dev);
out_runtime_disable:
pm_runtime_disable(dev);
return ret;
@@ -959,7 +987,8 @@ static int mtk_iommu_remove(struct platform_device *pdev)
bus_set_iommu(&platform_bus_type, NULL);

clk_disable_unprepare(data->bclk);
- device_link_remove(data->smicomm_dev, &pdev->dev);
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM))
+ device_link_remove(data->smicomm_dev, &pdev->dev);
pm_runtime_disable(&pdev->dev);
devm_free_irq(&pdev->dev, data->irq, data);
component_master_del(&pdev->dev, &mtk_iommu_com_ops);
@@ -1026,7 +1055,7 @@ static const struct dev_pm_ops mtk_iommu_pm_ops = {
static const struct mtk_iommu_plat_data mt2712_data = {
.m4u_plat = M4U_MT2712,
.flags = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG | SHARE_PGTABLE |
- NOT_STD_AXI_MODE,
+ NOT_STD_AXI_MODE | MTK_IOMMU_TYPE_MM,
.hw_list = &m4ulist,
.inv_sel_reg = REG_MMU_INV_SEL_GEN1,
.iova_region = single_domain,
@@ -1037,7 +1066,7 @@ static const struct mtk_iommu_plat_data mt2712_data = {
static const struct mtk_iommu_plat_data mt6779_data = {
.m4u_plat = M4U_MT6779,
.flags = HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | WR_THROT_EN |
- NOT_STD_AXI_MODE,
+ NOT_STD_AXI_MODE | MTK_IOMMU_TYPE_MM,
.inv_sel_reg = REG_MMU_INV_SEL_GEN2,
.iova_region = single_domain,
.iova_region_nr = ARRAY_SIZE(single_domain),
@@ -1046,7 +1075,8 @@ static const struct mtk_iommu_plat_data mt6779_data = {

static const struct mtk_iommu_plat_data mt8167_data = {
.m4u_plat = M4U_MT8167,
- .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR | NOT_STD_AXI_MODE,
+ .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR | NOT_STD_AXI_MODE |
+ MTK_IOMMU_TYPE_MM,
.inv_sel_reg = REG_MMU_INV_SEL_GEN1,
.iova_region = single_domain,
.iova_region_nr = ARRAY_SIZE(single_domain),
@@ -1056,7 +1086,8 @@ static const struct mtk_iommu_plat_data mt8167_data = {
static const struct mtk_iommu_plat_data mt8173_data = {
.m4u_plat = M4U_MT8173,
.flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
- HAS_LEGACY_IVRP_PADDR | NOT_STD_AXI_MODE,
+ HAS_LEGACY_IVRP_PADDR | NOT_STD_AXI_MODE |
+ MTK_IOMMU_TYPE_MM,
.inv_sel_reg = REG_MMU_INV_SEL_GEN1,
.iova_region = single_domain,
.iova_region_nr = ARRAY_SIZE(single_domain),
@@ -1065,7 +1096,7 @@ static const struct mtk_iommu_plat_data mt8173_data = {

static const struct mtk_iommu_plat_data mt8183_data = {
.m4u_plat = M4U_MT8183,
- .flags = RESET_AXI,
+ .flags = RESET_AXI | MTK_IOMMU_TYPE_MM,
.inv_sel_reg = REG_MMU_INV_SEL_GEN1,
.iova_region = single_domain,
.iova_region_nr = ARRAY_SIZE(single_domain),
@@ -1075,7 +1106,8 @@ static const struct mtk_iommu_plat_data mt8183_data = {
static const struct mtk_iommu_plat_data mt8192_data = {
.m4u_plat = M4U_MT8192,
.flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
- WR_THROT_EN | IOVA_34_EN | NOT_STD_AXI_MODE,
+ WR_THROT_EN | IOVA_34_EN | NOT_STD_AXI_MODE |
+ MTK_IOMMU_TYPE_MM,
.inv_sel_reg = REG_MMU_INV_SEL_GEN2,
.iova_region = mt8192_multi_dom,
.iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
--
2.18.0
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