linux-kernel - [PATCH v3 2/3] iommu: mtk_iommu: Introduce new flag TF_PORT_TO_ADDR

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Date:   Thu,  9 Jun 2022 12:40:00 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     yong.wu@...iatek.com
Cc:     joro@...tes.org, will@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
        iommu@...ts.linux-foundation.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        konrad.dybcio@...ainline.org, marijn.suijten@...ainline.org,
        martin.botka@...ainline.org, ~postmarketos/upstreaming@...ts.sr.ht,
        phone-devel@...r.kernel.org, paul.bouchara@...ainline.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v3 2/3] iommu: mtk_iommu: Introduce new flag TF_PORT_TO_ADDR_MT8173

In preparation for adding support for MT6795, add a new flag named
TF_PORT_TO_ADDR_MT8173 and use that instead of checking for m4u_plat
type in mtk_iommu_hw_init() to avoid seeing a long list of m4u_plat
checks there in the future.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/iommu/mtk_iommu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 0ea0848581e9..8611cf8e4bd5 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -140,6 +140,7 @@
 #define IFA_IOMMU_PCIE_SUPPORT		BIT(16)
 /* IOMMU I/O (r/w) is enabled using PERICFG_IOMMU_1 register */
 #define HAS_PERI_IOMMU1_REG		BIT(17)
+#define TF_PORT_TO_ADDR_MT8173		BIT(18)
 
 #define MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, mask)	\
 				((((pdata)->flags) & (mask)) == (_x))
@@ -960,7 +961,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data, unsigned int ban
 	 * Global control settings are in bank0. May re-init these global registers
 	 * since no sure if there is bank0 consumers.
 	 */
-	if (data->plat_data->m4u_plat == M4U_MT8173) {
+	if (MTK_IOMMU_HAS_FLAG(data->plat_data, TF_PORT_TO_ADDR_MT8173)) {
 		regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
 			 F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
 	} else {
@@ -1437,7 +1438,8 @@ 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 | MTK_IOMMU_TYPE_MM,
+			HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM |
+			TF_PORT_TO_ADDR_MT8173,
 	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
 	.banks_num    = 1,
 	.banks_enable = {true},
-- 
2.35.1