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authorYong Wu <yong.wu@mediatek.com>2019-08-24 11:02:05 +0800
committerJoerg Roedel <jroedel@suse.de>2019-08-30 15:57:27 +0200
commit567e58cf96dda2cc1d8dbdafbc1c089b5ea2be25 (patch)
tree1312bad1c20a913f134b602b9ce73f79f421f84d /drivers/memory
parent4f0a1a1ae35197e9b7a6d11b4e881bcfe973ad8f (diff)
downloadlinux-567e58cf96dda2cc1d8dbdafbc1c089b5ea2be25.tar.bz2
memory: mtk-smi: Add bus_sel for mt8183
There are 2 mmu cells in a M4U HW. we could adjust some larbs entering mmu0 or mmu1 to balance the bandwidth via the smi-common register SMI_BUS_SEL(0x220)(Each larb occupy 2 bits). In mt8183, For better performance, we switch larb1/2/5/7 to enter mmu1 while the others still keep enter mmu0. In mt8173 and mt2712, we don't get the performance issue, Keep its default value(0x0), that means all the larbs enter mmu0. Note: smi gen1(mt2701/mt7623) don't have this bus_sel. And, the base of smi-common is completely different with smi_ao_base of gen1, thus I add new variable for that. CC: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Evan Green <evgreen@chromium.org> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/memory')
-rw-r--r--drivers/memory/mtk-smi.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 2bb55b864fa9..289e59543a04 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -41,6 +41,12 @@
#define SMI_LARB_NONSEC_CON(id) (0x380 + ((id) * 4))
#define F_MMU_EN BIT(0)
+/* SMI COMMON */
+#define SMI_BUS_SEL 0x220
+#define SMI_BUS_LARB_SHIFT(larbid) ((larbid) << 1)
+/* All are MMU0 defaultly. Only specialize mmu1 here. */
+#define F_MMU1_LARB(larbid) (0x1 << SMI_BUS_LARB_SHIFT(larbid))
+
enum mtk_smi_gen {
MTK_SMI_GEN1,
MTK_SMI_GEN2
@@ -49,6 +55,7 @@ enum mtk_smi_gen {
struct mtk_smi_common_plat {
enum mtk_smi_gen gen;
bool has_gals;
+ u32 bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
};
struct mtk_smi_larb_gen {
@@ -64,8 +71,10 @@ struct mtk_smi {
struct clk *clk_apb, *clk_smi;
struct clk *clk_gals0, *clk_gals1;
struct clk *clk_async; /*only needed by mt2701*/
- void __iomem *smi_ao_base;
-
+ union {
+ void __iomem *smi_ao_base; /* only for gen1 */
+ void __iomem *base; /* only for gen2 */
+ };
const struct mtk_smi_common_plat *plat;
};
@@ -402,6 +411,8 @@ static const struct mtk_smi_common_plat mtk_smi_common_gen2 = {
static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
.gen = MTK_SMI_GEN2,
.has_gals = true,
+ .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
+ F_MMU1_LARB(7),
};
static const struct of_device_id mtk_smi_common_of_ids[] = {
@@ -474,6 +485,11 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
ret = clk_prepare_enable(common->clk_async);
if (ret)
return ret;
+ } else {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ common->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(common->base))
+ return PTR_ERR(common->base);
}
pm_runtime_enable(dev);
platform_set_drvdata(pdev, common);
@@ -489,6 +505,7 @@ static int mtk_smi_common_remove(struct platform_device *pdev)
static int __maybe_unused mtk_smi_common_resume(struct device *dev)
{
struct mtk_smi *common = dev_get_drvdata(dev);
+ u32 bus_sel = common->plat->bus_sel;
int ret;
ret = mtk_smi_clk_enable(common);
@@ -496,6 +513,9 @@ static int __maybe_unused mtk_smi_common_resume(struct device *dev)
dev_err(common->dev, "Failed to enable clock(%d).\n", ret);
return ret;
}
+
+ if (common->plat->gen == MTK_SMI_GEN2 && bus_sel)
+ writel(bus_sel, common->base + SMI_BUS_SEL);
return 0;
}