The registers for each bank of the IOMMU base are in order, delta is
0x1000. Initialise the base for each bank.
Meanwhile, Each bank has some independent registers. thus,
backup/restore them for each a bank.
For all the previous SoC, we only have bank0. thus use "do {} while()"
to allow bank0 always go.
Signed-off-by: Yong Wu <[email protected]>
---
drivers/iommu/mtk_iommu.c | 78 +++++++++++++++++++++++++++++----------
drivers/iommu/mtk_iommu.h | 6 +--
2 files changed, 61 insertions(+), 23 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index e297a50adced..3aaf425d5a18 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -114,6 +114,7 @@
#define F_MMU_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f)
#define MTK_PROTECT_PA_ALIGN 256
+#define MTK_IOMMU_BANK_SZ 0x1000
#define PERICFG_IOMMU_1 0x714
@@ -925,11 +926,11 @@ static int mtk_iommu_probe(struct platform_device *pdev)
struct mtk_iommu_data *data;
struct device *dev = &pdev->dev;
struct resource *res;
- resource_size_t ioaddr;
+ resource_size_t ioaddr, size;
struct component_match *match = NULL;
struct regmap *infracfg;
void *protect;
- int ret;
+ int ret, i = 0;
u32 val;
char *p;
struct mtk_iommu_bank_data *bank;
@@ -971,19 +972,30 @@ static int mtk_iommu_probe(struct platform_device *pdev)
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ size = resource_size(res);
+ if (size < data->plat_data->bank_nr * MTK_IOMMU_BANK_SZ) {
+ dev_err(dev, "banknr %d. res %pR is not enough.\n",
+ data->plat_data->bank_nr, res);
+ return -EINVAL;
+ }
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
ioaddr = res->start;
- bank = &data->bank[0];
- bank->base = base;
- bank->irq = platform_get_irq(pdev, 0);
- if (bank->irq < 0)
- return bank->irq;
- bank->pdev = dev;
- bank->pdata = data;
- spin_lock_init(&bank->tlb_lock);
+ do {
+ if (!data->plat_data->bank_enable[i])
+ continue;
+ bank = &data->bank[i];
+ bank->base = base + i * MTK_IOMMU_BANK_SZ;
+
+ bank->irq = platform_get_irq(pdev, i);
+ if (bank->irq < 0)
+ return bank->irq;
+ bank->pdev = dev;
+ bank->pdata = data;
+ spin_lock_init(&bank->tlb_lock);
+ } while (++i < data->plat_data->bank_nr);
if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) {
data->bclk = devm_clk_get(dev, "bclk");
@@ -1068,7 +1080,9 @@ static int mtk_iommu_probe(struct platform_device *pdev)
static int mtk_iommu_remove(struct platform_device *pdev)
{
struct mtk_iommu_data *data = platform_get_drvdata(pdev);
- struct mtk_iommu_bank_data *bank = &data->bank[0];
+ struct mtk_iommu_bank_data *bank;
+ bool bank_hwinit;
+ int i;
iommu_device_sysfs_remove(&data->iommu);
iommu_device_unregister(&data->iommu);
@@ -1080,7 +1094,18 @@ static int mtk_iommu_remove(struct platform_device *pdev)
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, bank->irq, bank);
+ for (i = 0; i < data->plat_data->bank_nr; i++) {
+ bank = &data->bank[i];
+ /*
+ * Use a register value to confirm if this bank HW is
initialised.
+ * If the bank has no consumer, the bank HW still won't be
+ * initialised even though bank_enable is true.
+ */
+ bank_hwinit = !!readl_relaxed(bank->base +
REG_MMU_PT_BASE_ADDR);
+ if (!bank_hwinit)
+ continue;
+ devm_free_irq(&pdev->dev, bank->irq, bank);
+ }
component_master_del(&pdev->dev, &mtk_iommu_com_ops);
return 0;
}
@@ -1090,15 +1115,21 @@ static int __maybe_unused
mtk_iommu_runtime_suspend(struct device *dev)
struct mtk_iommu_data *data = dev_get_drvdata(dev);
struct mtk_iommu_suspend_reg *reg = &data->reg;
void __iomem *base = data->bank[0].base;
+ int i = 0;
reg->wr_len_ctrl = readl_relaxed(base + REG_MMU_WR_LEN_CTRL);
reg->misc_ctrl = readl_relaxed(base + REG_MMU_MISC_CTRL);
reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS);
reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG);
- reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0);
- reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
- reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR);
reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
+ do {
+ if (!data->plat_data->bank_enable[i])
+ continue;
+ base = data->bank[i].base;
+ reg->int_control0[i] = readl_relaxed(base +
REG_MMU_INT_CONTROL0);
+ reg->int_main_control[i] = readl_relaxed(base +
REG_MMU_INT_MAIN_CONTROL);
+ reg->ivrp_paddr[i] = readl_relaxed(base + REG_MMU_IVRP_PADDR);
+ } while (++i < data->plat_data->bank_nr);
clk_disable_unprepare(data->bclk);
return 0;
}
@@ -1109,7 +1140,7 @@ static int __maybe_unused mtk_iommu_runtime_resume(struct
device *dev)
struct mtk_iommu_suspend_reg *reg = &data->reg;
struct mtk_iommu_domain *m4u_dom = data->bank[0].m4u_dom;
void __iomem *base = data->bank[0].base;
- int ret;
+ int ret, i = 0;
ret = clk_prepare_enable(data->bclk);
if (ret) {
@@ -1128,11 +1159,18 @@ static int __maybe_unused
mtk_iommu_runtime_resume(struct device *dev)
writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL);
writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS);
writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG);
- writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0);
- writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL);
- writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
- writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, base +
REG_MMU_PT_BASE_ADDR);
+ do {
+ if (!data->plat_data->bank_enable[i])
+ continue;
+ base = data->bank[i].base;
+ m4u_dom = data->bank[i].m4u_dom;
+ writel_relaxed(reg->int_control0[i], base +
REG_MMU_INT_CONTROL0);
+ writel_relaxed(reg->int_main_control[i], base +
REG_MMU_INT_MAIN_CONTROL);
+ writel_relaxed(reg->ivrp_paddr[i], base + REG_MMU_IVRP_PADDR);
+ writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
+ base + REG_MMU_PT_BASE_ADDR);
+ } while (++i < data->plat_data->bank_nr);
return 0;
}
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 8235957f1592..813e60de89d6 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -33,11 +33,11 @@ struct mtk_iommu_suspend_reg {
};
u32 dcm_dis;
u32 ctrl_reg;
- u32 int_control0;
- u32 int_main_control;
- u32 ivrp_paddr;
u32 vld_pa_rng;
u32 wr_len_ctrl;
+ u32 int_control0[MTK_IOMMU_BANK_MAX];
+ u32 int_main_control[MTK_IOMMU_BANK_MAX];
+ u32 ivrp_paddr[MTK_IOMMU_BANK_MAX];
};
enum mtk_iommu_plat {
--
2.18.0
_______________________________________________
iommu mailing list
[email protected]
https://lists.linuxfoundation.org/mailman/listinfo/iommu
