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iommu/mediatek: Add larb-id remapped support

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The larb-id may be remapped in the smi-common, this means the
larb-id reported in the mtk_iommu_isr isn't the real larb-id,

Take mt8183 as a example:
                       M4U
                        |
---------------------------------------------
|               SMI common                  |
-0-----7-----5-----6-----1-----2------3-----4- <- Id remapped
 |     |     |     |     |     |      |     |
larb0 larb1 IPU0  IPU1 larb4 larb5  larb6  CCU
disp  vdec  img   cam   venc  img    cam
As above, larb0 connects with the id 0 in smi-common.
          larb1 connects with the id 7 in smi-common.
          ...
If the larb-id reported in the isr is 7, actually it's larb1(vdec).
In order to output the right larb-id in the isr, we add a larb-id
remapping relationship in this patch.

If there is no this larb-id remapping in some SoCs, use the linear
mapping array instead.

This also is a preparing patch for mt8183.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yong Wu 2019-08-24 11:01:57 +08:00 committed by Joerg Roedel
parent 2aa4c2597c
commit b3e5eee765
2 changed files with 6 additions and 0 deletions
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4
drivers/iommu/mtk_iommu.c
View file

@ -236,6 +236,8 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
fault_larb = F_MMU0_INT_ID_LARB_ID(regval);
fault_port = F_MMU0_INT_ID_PORT_ID(regval);
fault_larb = data->plat_data->larbid_remap[fault_larb];
if (report_iommu_fault(&dom->domain, data->dev, fault_iova,
write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
dev_err_ratelimited(
@ -766,12 +768,14 @@ static const struct mtk_iommu_plat_data mt2712_data = {
.m4u_plat = M4U_MT2712,
.has_4gb_mode = true,
.has_bclk = true,
.larbid_remap = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
};
static const struct mtk_iommu_plat_data mt8173_data = {
.m4u_plat = M4U_MT8173,
.has_4gb_mode = true,
.has_bclk = true,
.larbid_remap = {0, 1, 2, 3, 4, 5}, /* Linear mapping. */
};
static const struct of_device_id mtk_iommu_of_ids[] = {

2
drivers/iommu/mtk_iommu.h
View file

@ -38,6 +38,8 @@ struct mtk_iommu_plat_data {
/* HW will use the EMI clock if there isn't the "bclk". */
bool has_bclk;
unsigned char larbid_remap[MTK_LARB_NR_MAX];
};
struct mtk_iommu_domain;