Each bank has some independent registers. thus backup/restore them for
each a bank when suspend and resume.
Signed-off-by: Yong Wu <yong...@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno
<angelogioacchino.delre...@collabora.com>
---
drivers/iommu/mtk_iommu.c | 46 ++++++++++++++++++++++++++-------------
1 file changed, 31 insertions(+), 15 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 400dea33aea1..d3e8773b4c47 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -173,11 +173,12 @@ struct mtk_iommu_suspend_reg {
u32 misc_ctrl;
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_control[MTK_IOMMU_BANK_MAX];
+ u32 int_main_control[MTK_IOMMU_BANK_MAX];
+ u32 ivrp_paddr[MTK_IOMMU_BANK_MAX];
};
struct mtk_iommu_plat_data {
@@ -1302,16 +1303,23 @@ 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;
+ void __iomem *base;
+ int i = 0;
+ base = data->bank[i].base;
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->banks_enable[i])
+ continue;
+ base = data->bank[i].base;
+ reg->int_control[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->banks_num);
clk_disable_unprepare(data->bclk);
return 0;
}
@@ -1320,9 +1328,9 @@ static int __maybe_unused mtk_iommu_runtime_resume(struct
device *dev)
{
struct mtk_iommu_data *data = dev_get_drvdata(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;
+ struct mtk_iommu_domain *m4u_dom;
+ void __iomem *base;
+ int ret, i = 0;
ret = clk_prepare_enable(data->bclk);
if (ret) {
@@ -1334,18 +1342,26 @@ static int __maybe_unused
mtk_iommu_runtime_resume(struct device *dev)
* Uppon first resume, only enable the clk and return, since the values
of the
* registers are not yet set.
*/
- if (!m4u_dom)
+ if (!reg->wr_len_ctrl)
return 0;
+ base = data->bank[i].base;
writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL);
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 {
+ m4u_dom = data->bank[i].m4u_dom;
+ if (!data->plat_data->banks_enable[i] || !m4u_dom)
+ continue;
+ base = data->bank[i].base;
+ writel_relaxed(reg->int_control[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->banks_num);
/*
* Users may allocate dma buffer before they call pm_runtime_get,
--
2.18.0
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