[PATCH v2 00/10] Adjust the dma-ranges for MTK IOMMU

[PATCH v2 00/10] Adjust the dma-ranges for MTK IOMMU

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges is not allowed for dts leaf node.
but we still would like to separate the different masters into
different iova regions. Thus we adjust the internal flow, separate
the 16GB iova range by the master HW larbid/portid and add the
dma-ranges property in the parent "soc" node. This also could avoid
the users forget/abuse the iova regions.

The commit f1ad5338a4d5 did affect the mt8195 venc, But it is not
a fatal issue, it could also work well at 0-4GB iova. thus I don't
add "Fixes:" tag.

In this series, I add functions for mt8192/mt8195/mt8186, mt8188 will
be in its special patchset. and the previous mt8173/mt8183...support
0-4GB only, no need this function.

Change note:
v2:
   a) Base on next-20230206 since mt8195 jpeg node was applied which
      affect this patchset.
   b) Reword the commit message [1/10][2/10] to explain effect.

v1: https://lore.kernel.org/linux-mediatek/20230113060133.9394-1-yong.wu@mediatek.com/
   Base on v6.2-rc3.

Yong Wu (10):
  dt-bindings: media: mediatek,vcodec: Remove dma-ranges property
  dt-bindings: media: mediatek,jpeg: Remove dma-ranges property
  iommu/mediatek: Get regionid from larb/port id
  iommu/mediatek: mt8195: Add larb_region_msk
  iommu/mediatek: mt8186: add larb_region_msk
  iommu/mediatek: mt8192: add larb_region_msk
  iommu/mediatek: Add a gap for the iova regions
  arm64: dts: mt8195: Add dma-ranges for the parent "soc" node
  arm64: dts: mt8195: Remove the unnecessary dma-ranges
  arm64: dts: mt8186: Add dma-ranges for the parent "soc" node

 .../media/mediatek,mt8195-jpegdec.yaml        |  7 --
 .../media/mediatek,mt8195-jpegenc.yaml        |  7 --
 .../media/mediatek,vcodec-decoder.yaml        |  5 -
 .../media/mediatek,vcodec-encoder.yaml        |  5 -
 .../media/mediatek,vcodec-subdev-decoder.yaml |  7 --
 .../bindings/media/mediatek-jpeg-encoder.yaml |  5 -
 arch/arm64/boot/dts/mediatek/mt8186.dtsi      |  1 +
 arch/arm64/boot/dts/mediatek/mt8195.dtsi      |  4 +-
 drivers/iommu/mtk_iommu.c                     | 95 ++++++++++++++-----
 9 files changed, 72 insertions(+), 64 deletions(-)

-- 
2.18.0

[PATCH v2 00/10] Adjust the dma-ranges for MTK IOMMU

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges is not allowed for dts leaf node.
but we still would like to separate the different masters into
different iova regions. Thus we adjust the internal flow, separate
the 16GB iova range by the master HW larbid/portid and add the
dma-ranges property in the parent "soc" node. This also could avoid
the users forget/abuse the iova regions.

The commit f1ad5338a4d5 did affect the mt8195 venc, But it is not
a fatal issue, it could also work well at 0-4GB iova. thus I don't
add "Fixes:" tag.

In this series, I add functions for mt8192/mt8195/mt8186, mt8188 will
be in its special patchset. and the previous mt8173/mt8183...support
0-4GB only, no need this function.

Change note:
v2:
   a) Base on next-20230206 since mt8195 jpeg node was applied which
      affect this patchset.
   b) Reword the commit message [1/10][2/10] to explain effect.

v1: https://lore.kernel.org/linux-mediatek/20230113060133.9394-1-yong.wu@mediatek.com/
   Base on v6.2-rc3.

Yong Wu (10):
  dt-bindings: media: mediatek,vcodec: Remove dma-ranges property
  dt-bindings: media: mediatek,jpeg: Remove dma-ranges property
  iommu/mediatek: Get regionid from larb/port id
  iommu/mediatek: mt8195: Add larb_region_msk
  iommu/mediatek: mt8186: add larb_region_msk
  iommu/mediatek: mt8192: add larb_region_msk
  iommu/mediatek: Add a gap for the iova regions
  arm64: dts: mt8195: Add dma-ranges for the parent "soc" node
  arm64: dts: mt8195: Remove the unnecessary dma-ranges
  arm64: dts: mt8186: Add dma-ranges for the parent "soc" node

 .../media/mediatek,mt8195-jpegdec.yaml        |  7 --
 .../media/mediatek,mt8195-jpegenc.yaml        |  7 --
 .../media/mediatek,vcodec-decoder.yaml        |  5 -
 .../media/mediatek,vcodec-encoder.yaml        |  5 -
 .../media/mediatek,vcodec-subdev-decoder.yaml |  7 --
 .../bindings/media/mediatek-jpeg-encoder.yaml |  5 -
 arch/arm64/boot/dts/mediatek/mt8186.dtsi      |  1 +
 arch/arm64/boot/dts/mediatek/mt8195.dtsi      |  4 +-
 drivers/iommu/mtk_iommu.c                     | 95 ++++++++++++++-----
 9 files changed, 72 insertions(+), 64 deletions(-)

-- 
2.18.0



_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v2 01/10] dt-bindings: media: mediatek,vcodec: Remove dma-ranges property

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges of the leaf node doesn't work. Remove
it for vcodec here.

1) For mediatek,vcodec-decoder.yaml and mediatek,vcodec-encoder.yaml,
this property is in the leaf node, it is invalid as the above comment.

Currently there is only mt8195 VENC node has this property in upstream.
Indeed, VENC is affected, but it is not a fatal issue. Originally it
expects its iova range locate at 4GB-8GB. However after that commit, its
expectation doesn't come true, it will fall back to 0-4GB iova and also
could work well.

2) For mediatek,vcodec-subdev-decoder.yaml, It already uses parent-child
node, this property works. Instead, MediaTek iommu will control the
masters' iova ranges by the master's larb/port id internally, then the
dma-ranges property is unnecessary for the master's node.

Cc: Tiffany Lin <tiffany.lin@mediatek.com>
Cc: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Cc: Yunfei Dong <yunfei.dong@mediatek.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../devicetree/bindings/media/mediatek,vcodec-decoder.yaml | 5 -----
 .../devicetree/bindings/media/mediatek,vcodec-encoder.yaml | 5 -----
 .../bindings/media/mediatek,vcodec-subdev-decoder.yaml     | 7 -------
 3 files changed, 17 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
index aa55ca65d6ed..fad59b486d5d 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
@@ -56,11 +56,6 @@ properties:
       List of the hardware port in respective IOMMU block for current Socs.
       Refer to bindings/iommu/mediatek,iommu.yaml.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   mediatek,vpu:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
index 0f2ea8d9a10c..a2051b31fa29 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
@@ -49,11 +49,6 @@ properties:
       List of the hardware port in respective IOMMU block for current Socs.
       Refer to bindings/iommu/mediatek,iommu.yaml.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   mediatek,vpu:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
index c4f20acdc1f8..290594bc91cc 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
@@ -76,11 +76,6 @@ properties:
       The node of system control processor (SCP), using
       the remoteproc & rpmsg framework.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   "#address-cells":
     const: 2
 
@@ -203,7 +198,6 @@ required:
   - reg
   - iommus
   - mediatek,scp
-  - dma-ranges
   - ranges
 
 if:
@@ -236,7 +230,6 @@ examples:
             compatible = "mediatek,mt8192-vcodec-dec";
             mediatek,scp = <&scp>;
             iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;
-            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
             #address-cells = <2>;
             #size-cells = <2>;
             ranges = <0 0 0 0x16000000 0 0x40000>;
-- 
2.18.0

[PATCH v2 01/10] dt-bindings: media: mediatek,vcodec: Remove dma-ranges property

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges of the leaf node doesn't work. Remove
it for vcodec here.

1) For mediatek,vcodec-decoder.yaml and mediatek,vcodec-encoder.yaml,
this property is in the leaf node, it is invalid as the above comment.

Currently there is only mt8195 VENC node has this property in upstream.
Indeed, VENC is affected, but it is not a fatal issue. Originally it
expects its iova range locate at 4GB-8GB. However after that commit, its
expectation doesn't come true, it will fall back to 0-4GB iova and also
could work well.

2) For mediatek,vcodec-subdev-decoder.yaml, It already uses parent-child
node, this property works. Instead, MediaTek iommu will control the
masters' iova ranges by the master's larb/port id internally, then the
dma-ranges property is unnecessary for the master's node.

Cc: Tiffany Lin <tiffany.lin@mediatek.com>
Cc: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Cc: Yunfei Dong <yunfei.dong@mediatek.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../devicetree/bindings/media/mediatek,vcodec-decoder.yaml | 5 -----
 .../devicetree/bindings/media/mediatek,vcodec-encoder.yaml | 5 -----
 .../bindings/media/mediatek,vcodec-subdev-decoder.yaml     | 7 -------
 3 files changed, 17 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
index aa55ca65d6ed..fad59b486d5d 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
@@ -56,11 +56,6 @@ properties:
       List of the hardware port in respective IOMMU block for current Socs.
       Refer to bindings/iommu/mediatek,iommu.yaml.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   mediatek,vpu:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
index 0f2ea8d9a10c..a2051b31fa29 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
@@ -49,11 +49,6 @@ properties:
       List of the hardware port in respective IOMMU block for current Socs.
       Refer to bindings/iommu/mediatek,iommu.yaml.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   mediatek,vpu:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
index c4f20acdc1f8..290594bc91cc 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
@@ -76,11 +76,6 @@ properties:
       The node of system control processor (SCP), using
       the remoteproc & rpmsg framework.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   "#address-cells":
     const: 2
 
@@ -203,7 +198,6 @@ required:
   - reg
   - iommus
   - mediatek,scp
-  - dma-ranges
   - ranges
 
 if:
@@ -236,7 +230,6 @@ examples:
             compatible = "mediatek,mt8192-vcodec-dec";
             mediatek,scp = <&scp>;
             iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;
-            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
             #address-cells = <2>;
             #size-cells = <2>;
             ranges = <0 0 0 0x16000000 0 0x40000>;
-- 
2.18.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v2 02/10] dt-bindings: media: mediatek,jpeg: Remove dma-ranges property

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges of the leaf node doesn't work. Remove
it for jpeg here.

Currently there is only mt8195 jpeg node has this property in upstream,
and it already uses parent-child node, this property did work. But instead,
MediaTek iommu will control the masters' iova ranges by the master's
larb/port id internally, then this property is unnecessary.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Bin Liu <bin.liu@mediatek.com>
Cc: kyrie wu <kyrie.wu@mediatek.corp-partner.google.com>
Cc: Xia Jiang <xia.jiang@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml | 7 -------
 .../devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml | 7 -------
 .../devicetree/bindings/media/mediatek-jpeg-encoder.yaml   | 5 -----
 3 files changed, 19 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml
index 71595c013dbb..e5448c60e3eb 100644
--- a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml
@@ -26,11 +26,6 @@ properties:
       Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
       Ports are according to the HW.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   "#address-cells":
     const: 2
 
@@ -89,7 +84,6 @@ required:
   - compatible
   - power-domains
   - iommus
-  - dma-ranges
   - ranges
 
 additionalProperties: false
@@ -115,7 +109,6 @@ examples:
                      <&iommu_vpp M4U_PORT_L19_JPGDEC_BSDMA1>,
                      <&iommu_vpp M4U_PORT_L19_JPGDEC_BUFF_OFFSET1>,
                      <&iommu_vpp M4U_PORT_L19_JPGDEC_BUFF_OFFSET0>;
-            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
             #address-cells = <2>;
             #size-cells = <2>;
             ranges;
diff --git a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml
index 95990539f7c0..596186497b68 100644
--- a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml
@@ -26,11 +26,6 @@ properties:
       Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
       Ports are according to the HW.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   "#address-cells":
     const: 2
 
@@ -89,7 +84,6 @@ required:
   - compatible
   - power-domains
   - iommus
-  - dma-ranges
   - ranges
 
 additionalProperties: false
@@ -113,7 +107,6 @@ examples:
                      <&iommu_vpp M4U_PORT_L20_JPGENC_C_RDMA>,
                      <&iommu_vpp M4U_PORT_L20_JPGENC_Q_TABLE>,
                      <&iommu_vpp M4U_PORT_L20_JPGENC_BSDMA>;
-            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
             #address-cells = <2>;
             #size-cells = <2>;
             ranges;
diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
index c8412e8ab353..37800e1908cc 100644
--- a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
@@ -44,11 +44,6 @@ properties:
       Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
       Ports are according to the HW.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
 required:
   - compatible
   - reg
-- 
2.18.0

[PATCH v2 02/10] dt-bindings: media: mediatek,jpeg: Remove dma-ranges property

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges of the leaf node doesn't work. Remove
it for jpeg here.

Currently there is only mt8195 jpeg node has this property in upstream,
and it already uses parent-child node, this property did work. But instead,
MediaTek iommu will control the masters' iova ranges by the master's
larb/port id internally, then this property is unnecessary.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Bin Liu <bin.liu@mediatek.com>
Cc: kyrie wu <kyrie.wu@mediatek.corp-partner.google.com>
Cc: Xia Jiang <xia.jiang@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml | 7 -------
 .../devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml | 7 -------
 .../devicetree/bindings/media/mediatek-jpeg-encoder.yaml   | 5 -----
 3 files changed, 19 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml
index 71595c013dbb..e5448c60e3eb 100644
--- a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml
@@ -26,11 +26,6 @@ properties:
       Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
       Ports are according to the HW.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   "#address-cells":
     const: 2
 
@@ -89,7 +84,6 @@ required:
   - compatible
   - power-domains
   - iommus
-  - dma-ranges
   - ranges
 
 additionalProperties: false
@@ -115,7 +109,6 @@ examples:
                      <&iommu_vpp M4U_PORT_L19_JPGDEC_BSDMA1>,
                      <&iommu_vpp M4U_PORT_L19_JPGDEC_BUFF_OFFSET1>,
                      <&iommu_vpp M4U_PORT_L19_JPGDEC_BUFF_OFFSET0>;
-            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
             #address-cells = <2>;
             #size-cells = <2>;
             ranges;
diff --git a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml
index 95990539f7c0..596186497b68 100644
--- a/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml
@@ -26,11 +26,6 @@ properties:
       Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
       Ports are according to the HW.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
   "#address-cells":
     const: 2
 
@@ -89,7 +84,6 @@ required:
   - compatible
   - power-domains
   - iommus
-  - dma-ranges
   - ranges
 
 additionalProperties: false
@@ -113,7 +107,6 @@ examples:
                      <&iommu_vpp M4U_PORT_L20_JPGENC_C_RDMA>,
                      <&iommu_vpp M4U_PORT_L20_JPGENC_Q_TABLE>,
                      <&iommu_vpp M4U_PORT_L20_JPGENC_BSDMA>;
-            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
             #address-cells = <2>;
             #size-cells = <2>;
             ranges;
diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
index c8412e8ab353..37800e1908cc 100644
--- a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
@@ -44,11 +44,6 @@ properties:
       Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
       Ports are according to the HW.
 
-  dma-ranges:
-    maxItems: 1
-    description: |
-      Describes the physical address space of IOMMU maps to memory.
-
 required:
   - compatible
   - reg
-- 
2.18.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v2 03/10] iommu/mediatek: Get regionid from larb/port id

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges is not allowed for dts leaf node.
but we still would like to separate to different masters
into different iova regions.

Thus we have to separate it by the HW larbid and portid. For example,
larb1/2 are in region2 and larb3 is in region3. The problem is that
some ports inside a larb are in region4 while some ports inside this
larb are in region5. Therefore I define a "larb_region_msk" to help
record the information for each a port. Take a example for a larb:
 [1] = ~0: means all ports in this larb are in region1;
 [2] = BIT(3) | BIT(4): means port3/4 in this larb are region2;
 [3] = ~(BIT(3) | BIT(4)): means all the other ports except port3/4
                           in this larb are region3.

This method also avoids the users forget/abuse the iova regions.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 43 +++++++++++++++++++++------------------
 1 file changed, 23 insertions(+), 20 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index d5a4955910ff..fc3d9be120a0 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -8,7 +8,6 @@
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/device.h>
-#include <linux/dma-direct.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -194,6 +193,7 @@ struct mtk_iommu_plat_data {
 	enum mtk_iommu_plat	m4u_plat;
 	u32			flags;
 	u32			inv_sel_reg;
+	const u32		(*larb_region_msk)[32];
 
 	char			*pericfg_comp_str;
 	struct list_head	*hw_list;
@@ -508,30 +508,33 @@ static unsigned int mtk_iommu_get_bank_id(struct device *dev,
 static int mtk_iommu_get_iova_region_id(struct device *dev,
 					const struct mtk_iommu_plat_data *plat_data)
 {
-	const struct mtk_iommu_iova_region *rgn = plat_data->iova_region;
-	const struct bus_dma_region *dma_rgn = dev->dma_range_map;
-	int i, candidate = -1;
-	dma_addr_t dma_end;
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+	unsigned int portidmsk = 0, larbid;
+	const u32 *rgn_larb_msk;
+	int i, region_id = -1;
 
-	if (!dma_rgn || plat_data->iova_region_nr == 1)
+	if (plat_data->iova_region_nr == 1)
 		return 0;
 
-	dma_end = dma_rgn->dma_start + dma_rgn->size - 1;
-	for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) {
-		/* Best fit. */
-		if (dma_rgn->dma_start == rgn->iova_base &&
-		    dma_end == rgn->iova_base + rgn->size - 1)
-			return i;
-		/* ok if it is inside this region. */
-		if (dma_rgn->dma_start >= rgn->iova_base &&
-		    dma_end < rgn->iova_base + rgn->size)
-			candidate = i;
+	larbid = MTK_M4U_TO_LARB(fwspec->ids[0]);
+	for (i = 0; i < fwspec->num_ids; i++)
+		portidmsk |= BIT(MTK_M4U_TO_PORT(fwspec->ids[i]));
+
+	for (i = 0; i < plat_data->iova_region_nr; i++) {
+		rgn_larb_msk = plat_data->larb_region_msk[i];
+		if (!rgn_larb_msk)
+			continue;
+
+		if  ((rgn_larb_msk[larbid] & portidmsk) == portidmsk) {
+			region_id = i;
+			break;
+		}
 	}
 
-	if (candidate >= 0)
-		return candidate;
-	dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n",
-		&dma_rgn->dma_start, dma_rgn->size);
+	if (region_id >= 0)
+		return region_id;
+	dev_err(dev, "Can NOT find the region for larb(%d-%x).\n",
+		larbid, portidmsk);
 	return -EINVAL;
 }
 
-- 
2.18.0

[PATCH v2 03/10] iommu/mediatek: Get regionid from larb/port id

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges is not allowed for dts leaf node.
but we still would like to separate to different masters
into different iova regions.

Thus we have to separate it by the HW larbid and portid. For example,
larb1/2 are in region2 and larb3 is in region3. The problem is that
some ports inside a larb are in region4 while some ports inside this
larb are in region5. Therefore I define a "larb_region_msk" to help
record the information for each a port. Take a example for a larb:
 [1] = ~0: means all ports in this larb are in region1;
 [2] = BIT(3) | BIT(4): means port3/4 in this larb are region2;
 [3] = ~(BIT(3) | BIT(4)): means all the other ports except port3/4
                           in this larb are region3.

This method also avoids the users forget/abuse the iova regions.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 43 +++++++++++++++++++++------------------
 1 file changed, 23 insertions(+), 20 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index d5a4955910ff..fc3d9be120a0 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -8,7 +8,6 @@
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/device.h>
-#include <linux/dma-direct.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -194,6 +193,7 @@ struct mtk_iommu_plat_data {
 	enum mtk_iommu_plat	m4u_plat;
 	u32			flags;
 	u32			inv_sel_reg;
+	const u32		(*larb_region_msk)[32];
 
 	char			*pericfg_comp_str;
 	struct list_head	*hw_list;
@@ -508,30 +508,33 @@ static unsigned int mtk_iommu_get_bank_id(struct device *dev,
 static int mtk_iommu_get_iova_region_id(struct device *dev,
 					const struct mtk_iommu_plat_data *plat_data)
 {
-	const struct mtk_iommu_iova_region *rgn = plat_data->iova_region;
-	const struct bus_dma_region *dma_rgn = dev->dma_range_map;
-	int i, candidate = -1;
-	dma_addr_t dma_end;
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+	unsigned int portidmsk = 0, larbid;
+	const u32 *rgn_larb_msk;
+	int i, region_id = -1;
 
-	if (!dma_rgn || plat_data->iova_region_nr == 1)
+	if (plat_data->iova_region_nr == 1)
 		return 0;
 
-	dma_end = dma_rgn->dma_start + dma_rgn->size - 1;
-	for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) {
-		/* Best fit. */
-		if (dma_rgn->dma_start == rgn->iova_base &&
-		    dma_end == rgn->iova_base + rgn->size - 1)
-			return i;
-		/* ok if it is inside this region. */
-		if (dma_rgn->dma_start >= rgn->iova_base &&
-		    dma_end < rgn->iova_base + rgn->size)
-			candidate = i;
+	larbid = MTK_M4U_TO_LARB(fwspec->ids[0]);
+	for (i = 0; i < fwspec->num_ids; i++)
+		portidmsk |= BIT(MTK_M4U_TO_PORT(fwspec->ids[i]));
+
+	for (i = 0; i < plat_data->iova_region_nr; i++) {
+		rgn_larb_msk = plat_data->larb_region_msk[i];
+		if (!rgn_larb_msk)
+			continue;
+
+		if  ((rgn_larb_msk[larbid] & portidmsk) == portidmsk) {
+			region_id = i;
+			break;
+		}
 	}
 
-	if (candidate >= 0)
-		return candidate;
-	dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n",
-		&dma_rgn->dma_start, dma_rgn->size);
+	if (region_id >= 0)
+		return region_id;
+	dev_err(dev, "Can NOT find the region for larb(%d-%x).\n",
+		larbid, portidmsk);
 	return -EINVAL;
 }
 
-- 
2.18.0


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[PATCH v2 04/10] iommu/mediatek: mt8195: Add larb_region_msk

[Yong Wu]

Add larb_region_msk for mt8195. We separate the 16GB iova regions
by each device's larbid/portid.
Refer to include/dt-bindings/memory/mt8195-memory-port.h

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index fc3d9be120a0..b120382a480b 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1537,6 +1537,21 @@ static const struct mtk_iommu_plat_data mt8195_data_infra = {
 	.iova_region_nr   = ARRAY_SIZE(single_domain),
 };
 
+static const unsigned int mt8195_larb_region_msk[][32] = {
+	[0] = {~0, ~0, ~0, ~0},               /* Region0: all ports for larb0/1/2/3 */
+	[1] = {0, 0, 0, 0, 0, 0, 0, 0,
+	       0, 0, 0, 0, 0, 0, 0, 0,
+	       0, 0, 0, ~0, ~0, ~0, ~0, ~0,   /* Region1: larb19/20/21/22/23/24 */
+	       ~0},
+	[2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0,    /* Region2: the other larbs. */
+	       ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
+	       ~0, ~0, 0, 0, 0, 0, 0, 0,
+	       0, ~0, ~0, ~0, ~0},
+	[3] = {0},
+	[4] = {[18] = BIT(0) | BIT(1)},       /* Only larb18 port0/1 */
+	[5] = {[18] = BIT(2) | BIT(3)},       /* Only larb18 port2/3 */
+};
+
 static const struct mtk_iommu_plat_data mt8195_data_vdo = {
 	.m4u_plat	= M4U_MT8195,
 	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
@@ -1547,6 +1562,7 @@ static const struct mtk_iommu_plat_data mt8195_data_vdo = {
 	.banks_enable   = {true},
 	.iova_region	= mt8192_multi_dom,
 	.iova_region_nr	= ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8195_larb_region_msk,
 	.larbid_remap   = {{2, 0}, {21}, {24}, {7}, {19}, {9, 10, 11},
 			   {13, 17, 15/* 17b */, 25}, {5}},
 };
@@ -1561,6 +1577,7 @@ static const struct mtk_iommu_plat_data mt8195_data_vpp = {
 	.banks_enable   = {true},
 	.iova_region	= mt8192_multi_dom,
 	.iova_region_nr	= ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8195_larb_region_msk,
 	.larbid_remap   = {{1}, {3},
 			   {22, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 23},
 			   {8}, {20}, {12},
-- 
2.18.0

[PATCH v2 04/10] iommu/mediatek: mt8195: Add larb_region_msk

[Yong Wu]

Add larb_region_msk for mt8195. We separate the 16GB iova regions
by each device's larbid/portid.
Refer to include/dt-bindings/memory/mt8195-memory-port.h

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index fc3d9be120a0..b120382a480b 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1537,6 +1537,21 @@ static const struct mtk_iommu_plat_data mt8195_data_infra = {
 	.iova_region_nr   = ARRAY_SIZE(single_domain),
 };
 
+static const unsigned int mt8195_larb_region_msk[][32] = {
+	[0] = {~0, ~0, ~0, ~0},               /* Region0: all ports for larb0/1/2/3 */
+	[1] = {0, 0, 0, 0, 0, 0, 0, 0,
+	       0, 0, 0, 0, 0, 0, 0, 0,
+	       0, 0, 0, ~0, ~0, ~0, ~0, ~0,   /* Region1: larb19/20/21/22/23/24 */
+	       ~0},
+	[2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0,    /* Region2: the other larbs. */
+	       ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
+	       ~0, ~0, 0, 0, 0, 0, 0, 0,
+	       0, ~0, ~0, ~0, ~0},
+	[3] = {0},
+	[4] = {[18] = BIT(0) | BIT(1)},       /* Only larb18 port0/1 */
+	[5] = {[18] = BIT(2) | BIT(3)},       /* Only larb18 port2/3 */
+};
+
 static const struct mtk_iommu_plat_data mt8195_data_vdo = {
 	.m4u_plat	= M4U_MT8195,
 	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
@@ -1547,6 +1562,7 @@ static const struct mtk_iommu_plat_data mt8195_data_vdo = {
 	.banks_enable   = {true},
 	.iova_region	= mt8192_multi_dom,
 	.iova_region_nr	= ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8195_larb_region_msk,
 	.larbid_remap   = {{2, 0}, {21}, {24}, {7}, {19}, {9, 10, 11},
 			   {13, 17, 15/* 17b */, 25}, {5}},
 };
@@ -1561,6 +1577,7 @@ static const struct mtk_iommu_plat_data mt8195_data_vpp = {
 	.banks_enable   = {true},
 	.iova_region	= mt8192_multi_dom,
 	.iova_region_nr	= ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8195_larb_region_msk,
 	.larbid_remap   = {{1}, {3},
 			   {22, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 23},
 			   {8}, {20}, {12},
-- 
2.18.0


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[PATCH v2 05/10] iommu/mediatek: mt8186: add larb_region_msk

[Yong Wu]

Add larb_region_msk for mt8186. We separate the 16GB iova regions
by each device's larbid/portid.
Note: larb5/6/10/12/14/15/18 connect nothing in this SoC.
Refer to include/dt-bindings/memory/mt8186-memory-port.h

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index b120382a480b..5a9e0fbb534e 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1495,6 +1495,18 @@ static const struct mtk_iommu_plat_data mt8183_data = {
 	.larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}},
 };
 
+static const unsigned int mt8186_larb_region_msk[][32] = {
+	[0] = {~0, ~0, ~0},			/* Region0: all ports for larb0/1/2 */
+	[1] = {0, 0, 0, 0, ~0, 0, 0, ~0},	/* Region1: larb4/7 */
+	[2] = {0, 0, 0, 0, 0, 0, 0, 0,		/* Region2: larb8/9/11/13/16/17/19/20 */
+	       ~0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), 0, 0,
+						/* larb13: the other ports except port9/10 */
+	       ~0, ~0, 0, ~0, ~0},
+	[3] = {0},
+	[4] = {[13] = BIT(9) | BIT(10)},	/* larb13 port9/10 */
+	[5] = {[14] = ~0},			/* larb14 */
+};
+
 static const struct mtk_iommu_plat_data mt8186_data_mm = {
 	.m4u_plat       = M4U_MT8186,
 	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
@@ -1507,6 +1519,7 @@ static const struct mtk_iommu_plat_data mt8186_data_mm = {
 	.banks_enable   = {true},
 	.iova_region    = mt8192_multi_dom,
 	.iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8186_larb_region_msk,
 };
 
 static const struct mtk_iommu_plat_data mt8192_data = {
-- 
2.18.0

[PATCH v2 05/10] iommu/mediatek: mt8186: add larb_region_msk

[Yong Wu]

Add larb_region_msk for mt8186. We separate the 16GB iova regions
by each device's larbid/portid.
Note: larb5/6/10/12/14/15/18 connect nothing in this SoC.
Refer to include/dt-bindings/memory/mt8186-memory-port.h

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index b120382a480b..5a9e0fbb534e 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1495,6 +1495,18 @@ static const struct mtk_iommu_plat_data mt8183_data = {
 	.larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}},
 };
 
+static const unsigned int mt8186_larb_region_msk[][32] = {
+	[0] = {~0, ~0, ~0},			/* Region0: all ports for larb0/1/2 */
+	[1] = {0, 0, 0, 0, ~0, 0, 0, ~0},	/* Region1: larb4/7 */
+	[2] = {0, 0, 0, 0, 0, 0, 0, 0,		/* Region2: larb8/9/11/13/16/17/19/20 */
+	       ~0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), 0, 0,
+						/* larb13: the other ports except port9/10 */
+	       ~0, ~0, 0, ~0, ~0},
+	[3] = {0},
+	[4] = {[13] = BIT(9) | BIT(10)},	/* larb13 port9/10 */
+	[5] = {[14] = ~0},			/* larb14 */
+};
+
 static const struct mtk_iommu_plat_data mt8186_data_mm = {
 	.m4u_plat       = M4U_MT8186,
 	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
@@ -1507,6 +1519,7 @@ static const struct mtk_iommu_plat_data mt8186_data_mm = {
 	.banks_enable   = {true},
 	.iova_region    = mt8192_multi_dom,
 	.iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8186_larb_region_msk,
 };
 
 static const struct mtk_iommu_plat_data mt8192_data = {
-- 
2.18.0


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[PATCH v2 06/10] iommu/mediatek: mt8192: add larb_region_msk

[Yong Wu]

Add larb_region_msk for mt8192. We separate the 16GB iova regions
by each device's larbid/portid.
Note: larb3/6/8/10/12/15 connect nothing in this SoC.
Refer to the comment in include/dt-bindings/memory/mt8192-larb-port.h

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 5a9e0fbb534e..7e8fd0a0536c 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1522,6 +1522,17 @@ static const struct mtk_iommu_plat_data mt8186_data_mm = {
 	.larb_region_msk = mt8186_larb_region_msk,
 };
 
+static const unsigned int mt8192_larb_region_msk[][32] = {
+	[0] = {~0, ~0},				/* Region0: larb0/1 */
+	[1] = {0, 0, 0, 0, ~0, ~0, 0, ~0},	/* Region1: larb4/5/7 */
+	[2] = {0, 0, ~0, 0, 0, 0, 0, 0,		/* Region2: larb2/9/11/13/14/16/17/18/19/20 */
+	       0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), ~(u32)(BIT(4) | BIT(5)), 0,
+	       ~0, ~0, ~0, ~0, ~0},
+	[3] = {0},
+	[4] = {[13] = BIT(9) | BIT(10)},	/* larb13 port9/10 */
+	[5] = {[14] = BIT(4) | BIT(5)},		/* larb14 port4/5 */
+};
+
 static const struct mtk_iommu_plat_data mt8192_data = {
 	.m4u_plat       = M4U_MT8192,
 	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
@@ -1531,6 +1542,7 @@ static const struct mtk_iommu_plat_data mt8192_data = {
 	.banks_enable   = {true},
 	.iova_region    = mt8192_multi_dom,
 	.iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8192_larb_region_msk,
 	.larbid_remap   = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
 			   {0, 14, 16}, {0, 13, 18, 17}},
 };
-- 
2.18.0

[PATCH v2 06/10] iommu/mediatek: mt8192: add larb_region_msk

[Yong Wu]

Add larb_region_msk for mt8192. We separate the 16GB iova regions
by each device's larbid/portid.
Note: larb3/6/8/10/12/15 connect nothing in this SoC.
Refer to the comment in include/dt-bindings/memory/mt8192-larb-port.h

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 5a9e0fbb534e..7e8fd0a0536c 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1522,6 +1522,17 @@ static const struct mtk_iommu_plat_data mt8186_data_mm = {
 	.larb_region_msk = mt8186_larb_region_msk,
 };
 
+static const unsigned int mt8192_larb_region_msk[][32] = {
+	[0] = {~0, ~0},				/* Region0: larb0/1 */
+	[1] = {0, 0, 0, 0, ~0, ~0, 0, ~0},	/* Region1: larb4/5/7 */
+	[2] = {0, 0, ~0, 0, 0, 0, 0, 0,		/* Region2: larb2/9/11/13/14/16/17/18/19/20 */
+	       0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), ~(u32)(BIT(4) | BIT(5)), 0,
+	       ~0, ~0, ~0, ~0, ~0},
+	[3] = {0},
+	[4] = {[13] = BIT(9) | BIT(10)},	/* larb13 port9/10 */
+	[5] = {[14] = BIT(4) | BIT(5)},		/* larb14 port4/5 */
+};
+
 static const struct mtk_iommu_plat_data mt8192_data = {
 	.m4u_plat       = M4U_MT8192,
 	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
@@ -1531,6 +1542,7 @@ static const struct mtk_iommu_plat_data mt8192_data = {
 	.banks_enable   = {true},
 	.iova_region    = mt8192_multi_dom,
 	.iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
+	.larb_region_msk = mt8192_larb_region_msk,
 	.larbid_remap   = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
 			   {0, 14, 16}, {0, 13, 18, 17}},
 };
-- 
2.18.0


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[PATCH v2 07/10] iommu/mediatek: Add a gap for the iova regions

[Yong Wu]

As the removed property in the vcodec dt-binding, the property is:
dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;

The length is 0xfff0_0000 rather than 0x1_0000_0000, this means it
requires 1M as a gap. This is because the end address for some vcodec
HW is (address + size). If the size is 4G, the end address may be
0x2_0000_0000, and the width for vcodec register only is 32, then the
HW may get the ZERO address.

Currently the consumer's dma-ranges property doesn't work, IOMMU
have to consider this problem. Add a bigger gap(8M) for all the regions
to avoid it.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 7e8fd0a0536c..2e8ffcec35d9 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -304,15 +304,15 @@ static LIST_HEAD(m4ulist);	/* List all the M4U HWs */
 #define for_each_m4u(data, head)  list_for_each_entry(data, head, list)
 
 static const struct mtk_iommu_iova_region single_domain[] = {
-	{.iova_base = 0,		.size = SZ_4G},
+	{.iova_base = 0,		.size = SZ_4G - SZ_8M},
 };
 
 static const struct mtk_iommu_iova_region mt8192_multi_dom[] = {
-	{ .iova_base = 0x0,		.size = SZ_4G},		/* 0 ~ 4G */
+	{ .iova_base = 0x0,		.size = SZ_4G - SZ_8M},	/* 0 ~ 4G, 8M as a gap. */
 	#if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
-	{ .iova_base = SZ_4G,		.size = SZ_4G},		/* 4G ~ 8G */
-	{ .iova_base = SZ_4G * 2,	.size = SZ_4G},		/* 8G ~ 12G */
-	{ .iova_base = SZ_4G * 3,	.size = SZ_4G},		/* 12G ~ 16G */
+	{ .iova_base = SZ_4G,		.size = SZ_4G - SZ_8M},	/* 4G ~ 8G */
+	{ .iova_base = SZ_4G * 2,	.size = SZ_4G - SZ_8M},	/* 8G ~ 12G */
+	{ .iova_base = SZ_4G * 3,	.size = SZ_4G - SZ_8M},	/* 12G ~ 16G */
 
 	{ .iova_base = 0x240000000ULL,	.size = 0x4000000},	/* CCU0 */
 	{ .iova_base = 0x244000000ULL,	.size = 0x4000000},	/* CCU1 */
-- 
2.18.0

[PATCH v2 07/10] iommu/mediatek: Add a gap for the iova regions

[Yong Wu]

As the removed property in the vcodec dt-binding, the property is:
dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;

The length is 0xfff0_0000 rather than 0x1_0000_0000, this means it
requires 1M as a gap. This is because the end address for some vcodec
HW is (address + size). If the size is 4G, the end address may be
0x2_0000_0000, and the width for vcodec register only is 32, then the
HW may get the ZERO address.

Currently the consumer's dma-ranges property doesn't work, IOMMU
have to consider this problem. Add a bigger gap(8M) for all the regions
to avoid it.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 7e8fd0a0536c..2e8ffcec35d9 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -304,15 +304,15 @@ static LIST_HEAD(m4ulist);	/* List all the M4U HWs */
 #define for_each_m4u(data, head)  list_for_each_entry(data, head, list)
 
 static const struct mtk_iommu_iova_region single_domain[] = {
-	{.iova_base = 0,		.size = SZ_4G},
+	{.iova_base = 0,		.size = SZ_4G - SZ_8M},
 };
 
 static const struct mtk_iommu_iova_region mt8192_multi_dom[] = {
-	{ .iova_base = 0x0,		.size = SZ_4G},		/* 0 ~ 4G */
+	{ .iova_base = 0x0,		.size = SZ_4G - SZ_8M},	/* 0 ~ 4G, 8M as a gap. */
 	#if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
-	{ .iova_base = SZ_4G,		.size = SZ_4G},		/* 4G ~ 8G */
-	{ .iova_base = SZ_4G * 2,	.size = SZ_4G},		/* 8G ~ 12G */
-	{ .iova_base = SZ_4G * 3,	.size = SZ_4G},		/* 12G ~ 16G */
+	{ .iova_base = SZ_4G,		.size = SZ_4G - SZ_8M},	/* 4G ~ 8G */
+	{ .iova_base = SZ_4G * 2,	.size = SZ_4G - SZ_8M},	/* 8G ~ 12G */
+	{ .iova_base = SZ_4G * 3,	.size = SZ_4G - SZ_8M},	/* 12G ~ 16G */
 
 	{ .iova_base = 0x240000000ULL,	.size = 0x4000000},	/* CCU0 */
 	{ .iova_base = 0x244000000ULL,	.size = 0x4000000},	/* CCU1 */
-- 
2.18.0


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[PATCH v2 08/10] arm64: dts: mt8195: Add dma-ranges for the parent "soc" node

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges property is not allowed for
the leaf node. But our iommu/dma-ranges is 16GB, we still expect
separate the 16GB dma-range like:
a) display is in 0 - 4GB;
b) vcodec is in 4GB - 8GB;
c) camera is in 8GB - 12GB.
We can not expect all the masters add a parent node for them,
especial for the existed drivers/nodes.
Thus, we add whole the 16GB dma-ranges in the parent "soc" node.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 8f1264d5290b..0f5a31ca1b70 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -364,6 +364,7 @@
 		#size-cells = <2>;
 		compatible = "simple-bus";
 		ranges;
+		dma-ranges = <0x0 0x0 0x0 0x0 0x4 0x0>;
 
 		gic: interrupt-controller@c000000 {
 			compatible = "arm,gic-v3";
-- 
2.18.0

[PATCH v2 08/10] arm64: dts: mt8195: Add dma-ranges for the parent "soc" node

[Yong Wu]

After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
controllers"), the dma-ranges property is not allowed for
the leaf node. But our iommu/dma-ranges is 16GB, we still expect
separate the 16GB dma-range like:
a) display is in 0 - 4GB;
b) vcodec is in 4GB - 8GB;
c) camera is in 8GB - 12GB.
We can not expect all the masters add a parent node for them,
especial for the existed drivers/nodes.
Thus, we add whole the 16GB dma-ranges in the parent "soc" node.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 8f1264d5290b..0f5a31ca1b70 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -364,6 +364,7 @@
 		#size-cells = <2>;
 		compatible = "simple-bus";
 		ranges;
+		dma-ranges = <0x0 0x0 0x0 0x0 0x4 0x0>;
 
 		gic: interrupt-controller@c000000 {
 			compatible = "arm,gic-v3";
-- 
2.18.0


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[PATCH v2 09/10] arm64: dts: mt8195: Remove the unnecessary dma-ranges

[Yong Wu]

After we add the dma-ranges in the parent "soc" node,
this property is unnecessary for the leaf node.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195.dtsi | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 0f5a31ca1b70..7d87cbabc9f1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -2300,7 +2300,6 @@
 			power-domains = <&spm MT8195_POWER_DOMAIN_VENC>;
 			#address-cells = <2>;
 			#size-cells = <2>;
-			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
 		};
 
 		jpgdec-master {
@@ -2312,7 +2311,6 @@
 				 <&iommu_vdo M4U_PORT_L19_JPGDEC_BSDMA1>,
 				 <&iommu_vdo M4U_PORT_L19_JPGDEC_BUFF_OFFSET1>,
 				 <&iommu_vdo M4U_PORT_L19_JPGDEC_BUFF_OFFSET0>;
-			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
@@ -2384,7 +2382,6 @@
 					<&iommu_vpp M4U_PORT_L20_JPGENC_C_RDMA>,
 					<&iommu_vpp M4U_PORT_L20_JPGENC_Q_TABLE>,
 					<&iommu_vpp M4U_PORT_L20_JPGENC_BSDMA>;
-			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
-- 
2.18.0

[PATCH v2 09/10] arm64: dts: mt8195: Remove the unnecessary dma-ranges

[Yong Wu]

After we add the dma-ranges in the parent "soc" node,
this property is unnecessary for the leaf node.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195.dtsi | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 0f5a31ca1b70..7d87cbabc9f1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -2300,7 +2300,6 @@
 			power-domains = <&spm MT8195_POWER_DOMAIN_VENC>;
 			#address-cells = <2>;
 			#size-cells = <2>;
-			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
 		};
 
 		jpgdec-master {
@@ -2312,7 +2311,6 @@
 				 <&iommu_vdo M4U_PORT_L19_JPGDEC_BSDMA1>,
 				 <&iommu_vdo M4U_PORT_L19_JPGDEC_BUFF_OFFSET1>,
 				 <&iommu_vdo M4U_PORT_L19_JPGDEC_BUFF_OFFSET0>;
-			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
@@ -2384,7 +2382,6 @@
 					<&iommu_vpp M4U_PORT_L20_JPGENC_C_RDMA>,
 					<&iommu_vpp M4U_PORT_L20_JPGENC_Q_TABLE>,
 					<&iommu_vpp M4U_PORT_L20_JPGENC_BSDMA>;
-			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
-- 
2.18.0


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[PATCH v2 10/10] arm64: dts: mt8186: Add dma-ranges for the parent "soc" node

[Yong Wu]

Prepare for the MM nodes whose dma-ranges(iova range) is 16GB.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8186.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8186.dtsi b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
index a0d3e1f731bd..251eace411c0 100644
--- a/arch/arm64/boot/dts/mediatek/mt8186.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
@@ -324,6 +324,7 @@
 		#address-cells = <2>;
 		#size-cells = <2>;
 		compatible = "simple-bus";
+		dma-ranges = <0x0 0x0 0x0 0x0 0x4 0x0>;
 		ranges;
 
 		gic: interrupt-controller@c000000 {
-- 
2.18.0

[PATCH v2 10/10] arm64: dts: mt8186: Add dma-ranges for the parent "soc" node

[Yong Wu]

Prepare for the MM nodes whose dma-ranges(iova range) is 16GB.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8186.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8186.dtsi b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
index a0d3e1f731bd..251eace411c0 100644
--- a/arch/arm64/boot/dts/mediatek/mt8186.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186.dtsi
@@ -324,6 +324,7 @@
 		#address-cells = <2>;
 		#size-cells = <2>;
 		compatible = "simple-bus";
+		dma-ranges = <0x0 0x0 0x0 0x0 0x4 0x0>;
 		ranges;
 
 		gic: interrupt-controller@c000000 {
-- 
2.18.0


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Re: [PATCH v2 03/10] iommu/mediatek: Get regionid from larb/port id

[AngeloGioacchino Del Regno]

Il 08/02/23 06:36, Yong Wu ha scritto:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges is not allowed for dts leaf node.
> but we still would like to separate to different masters
> into different iova regions.
> 
> Thus we have to separate it by the HW larbid and portid. For example,
> larb1/2 are in region2 and larb3 is in region3. The problem is that
> some ports inside a larb are in region4 while some ports inside this
> larb are in region5. Therefore I define a "larb_region_msk" to help
> record the information for each a port. Take a example for a larb:
>   [1] = ~0: means all ports in this larb are in region1;
>   [2] = BIT(3) | BIT(4): means port3/4 in this larb are region2;
>   [3] = ~(BIT(3) | BIT(4)): means all the other ports except port3/4
>                             in this larb are region3.
> 
> This method also avoids the users forget/abuse the iova regions.
> 
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
>   drivers/iommu/mtk_iommu.c | 43 +++++++++++++++++++++------------------
>   1 file changed, 23 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index d5a4955910ff..fc3d9be120a0 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -8,7 +8,6 @@
>   #include <linux/clk.h>
>   #include <linux/component.h>
>   #include <linux/device.h>
> -#include <linux/dma-direct.h>
>   #include <linux/err.h>
>   #include <linux/interrupt.h>
>   #include <linux/io.h>
> @@ -194,6 +193,7 @@ struct mtk_iommu_plat_data {
>   	enum mtk_iommu_plat	m4u_plat;
>   	u32			flags;
>   	u32			inv_sel_reg;
> +	const u32		(*larb_region_msk)[32];

Can you please document this larb region mask in code, other than the commit
description?

I can see this being essential for the next person reading this driver's code
without digging through the commit history. At least some comment on top of
the pointer, or on top of the struct declaration... and perhaps also describe
briefly that the array is "indexed by region" (so 1 = region 1; 2 = region 2)
and that the region index corresponds to the same index as `mtk_iommu_iova_region`.


Before doing that, I'd like to check if anyone else has a better solution for
that... because when looking at data for one of the SoCs in here, it looks a bit
intimidating!

Copy-paste from patch [04/10] of this series for the reader's commodity:

static const unsigned int mt8195_larb_region_msk[][32] = {
	[0] = {~0, ~0, ~0, ~0},               /* Region0: all ports for larb0/1/2/3 */
	[1] = {0, 0, 0, 0, 0, 0, 0, 0,
	       0, 0, 0, 0, 0, 0, 0, 0,
	       0, 0, 0, ~0, ~0, ~0, ~0, ~0,   /* Region1: larb19/20/21/22/23/24 */
	       ~0},
	[2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0,    /* Region2: the other larbs. */
	       ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
	       ~0, ~0, 0, 0, 0, 0, 0, 0,
	       0, ~0, ~0, ~0, ~0},
	[3] = {0},
	[4] = {[18] = BIT(0) | BIT(1)},       /* Only larb18 port0/1 */
	[5] = {[18] = BIT(2) | BIT(3)},       /* Only larb18 port2/3 */
};

^^^^ That's what I actually mean by "intimidating"... :-P

It's just looks though, there's nothing much complicated here.

Regards,
Angelo

Re: [PATCH v2 03/10] iommu/mediatek: Get regionid from larb/port id

[AngeloGioacchino Del Regno]

Il 08/02/23 06:36, Yong Wu ha scritto:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges is not allowed for dts leaf node.
> but we still would like to separate to different masters
> into different iova regions.
> 
> Thus we have to separate it by the HW larbid and portid. For example,
> larb1/2 are in region2 and larb3 is in region3. The problem is that
> some ports inside a larb are in region4 while some ports inside this
> larb are in region5. Therefore I define a "larb_region_msk" to help
> record the information for each a port. Take a example for a larb:
>   [1] = ~0: means all ports in this larb are in region1;
>   [2] = BIT(3) | BIT(4): means port3/4 in this larb are region2;
>   [3] = ~(BIT(3) | BIT(4)): means all the other ports except port3/4
>                             in this larb are region3.
> 
> This method also avoids the users forget/abuse the iova regions.
> 
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
>   drivers/iommu/mtk_iommu.c | 43 +++++++++++++++++++++------------------
>   1 file changed, 23 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index d5a4955910ff..fc3d9be120a0 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -8,7 +8,6 @@
>   #include <linux/clk.h>
>   #include <linux/component.h>
>   #include <linux/device.h>
> -#include <linux/dma-direct.h>
>   #include <linux/err.h>
>   #include <linux/interrupt.h>
>   #include <linux/io.h>
> @@ -194,6 +193,7 @@ struct mtk_iommu_plat_data {
>   	enum mtk_iommu_plat	m4u_plat;
>   	u32			flags;
>   	u32			inv_sel_reg;
> +	const u32		(*larb_region_msk)[32];

Can you please document this larb region mask in code, other than the commit
description?

I can see this being essential for the next person reading this driver's code
without digging through the commit history. At least some comment on top of
the pointer, or on top of the struct declaration... and perhaps also describe
briefly that the array is "indexed by region" (so 1 = region 1; 2 = region 2)
and that the region index corresponds to the same index as `mtk_iommu_iova_region`.


Before doing that, I'd like to check if anyone else has a better solution for
that... because when looking at data for one of the SoCs in here, it looks a bit
intimidating!

Copy-paste from patch [04/10] of this series for the reader's commodity:

static const unsigned int mt8195_larb_region_msk[][32] = {
	[0] = {~0, ~0, ~0, ~0},               /* Region0: all ports for larb0/1/2/3 */
	[1] = {0, 0, 0, 0, 0, 0, 0, 0,
	       0, 0, 0, 0, 0, 0, 0, 0,
	       0, 0, 0, ~0, ~0, ~0, ~0, ~0,   /* Region1: larb19/20/21/22/23/24 */
	       ~0},
	[2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0,    /* Region2: the other larbs. */
	       ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
	       ~0, ~0, 0, 0, 0, 0, 0, 0,
	       0, ~0, ~0, ~0, ~0},
	[3] = {0},
	[4] = {[18] = BIT(0) | BIT(1)},       /* Only larb18 port0/1 */
	[5] = {[18] = BIT(2) | BIT(3)},       /* Only larb18 port2/3 */
};

^^^^ That's what I actually mean by "intimidating"... :-P

It's just looks though, there's nothing much complicated here.

Regards,
Angelo



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Re: [PATCH v2 01/10] dt-bindings: media: mediatek,vcodec: Remove dma-ranges property

[Rob Herring]

On Wed, 08 Feb 2023 13:36:34 +0800, Yong Wu wrote:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges of the leaf node doesn't work. Remove
> it for vcodec here.
> 
> 1) For mediatek,vcodec-decoder.yaml and mediatek,vcodec-encoder.yaml,
> this property is in the leaf node, it is invalid as the above comment.
> 
> Currently there is only mt8195 VENC node has this property in upstream.
> Indeed, VENC is affected, but it is not a fatal issue. Originally it
> expects its iova range locate at 4GB-8GB. However after that commit, its
> expectation doesn't come true, it will fall back to 0-4GB iova and also
> could work well.
> 
> 2) For mediatek,vcodec-subdev-decoder.yaml, It already uses parent-child
> node, this property works. Instead, MediaTek iommu will control the
> masters' iova ranges by the master's larb/port id internally, then the
> dma-ranges property is unnecessary for the master's node.
> 
> Cc: Tiffany Lin <tiffany.lin@mediatek.com>
> Cc: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
> Cc: Yunfei Dong <yunfei.dong@mediatek.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  .../devicetree/bindings/media/mediatek,vcodec-decoder.yaml | 5 -----
>  .../devicetree/bindings/media/mediatek,vcodec-encoder.yaml | 5 -----
>  .../bindings/media/mediatek,vcodec-subdev-decoder.yaml     | 7 -------
>  3 files changed, 17 deletions(-)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 01/10] dt-bindings: media: mediatek,vcodec: Remove dma-ranges property

[Rob Herring]

On Wed, 08 Feb 2023 13:36:34 +0800, Yong Wu wrote:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges of the leaf node doesn't work. Remove
> it for vcodec here.
> 
> 1) For mediatek,vcodec-decoder.yaml and mediatek,vcodec-encoder.yaml,
> this property is in the leaf node, it is invalid as the above comment.
> 
> Currently there is only mt8195 VENC node has this property in upstream.
> Indeed, VENC is affected, but it is not a fatal issue. Originally it
> expects its iova range locate at 4GB-8GB. However after that commit, its
> expectation doesn't come true, it will fall back to 0-4GB iova and also
> could work well.
> 
> 2) For mediatek,vcodec-subdev-decoder.yaml, It already uses parent-child
> node, this property works. Instead, MediaTek iommu will control the
> masters' iova ranges by the master's larb/port id internally, then the
> dma-ranges property is unnecessary for the master's node.
> 
> Cc: Tiffany Lin <tiffany.lin@mediatek.com>
> Cc: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
> Cc: Yunfei Dong <yunfei.dong@mediatek.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  .../devicetree/bindings/media/mediatek,vcodec-decoder.yaml | 5 -----
>  .../devicetree/bindings/media/mediatek,vcodec-encoder.yaml | 5 -----
>  .../bindings/media/mediatek,vcodec-subdev-decoder.yaml     | 7 -------
>  3 files changed, 17 deletions(-)
> 

Acked-by: Rob Herring <robh@kernel.org>


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Re: [PATCH v2 02/10] dt-bindings: media: mediatek,jpeg: Remove dma-ranges property

[Rob Herring]

On Wed, 08 Feb 2023 13:36:35 +0800, Yong Wu wrote:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges of the leaf node doesn't work. Remove
> it for jpeg here.
> 
> Currently there is only mt8195 jpeg node has this property in upstream,
> and it already uses parent-child node, this property did work. But instead,
> MediaTek iommu will control the masters' iova ranges by the master's
> larb/port id internally, then this property is unnecessary.
> 
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Cc: Bin Liu <bin.liu@mediatek.com>
> Cc: kyrie wu <kyrie.wu@mediatek.corp-partner.google.com>
> Cc: Xia Jiang <xia.jiang@mediatek.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  .../devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml | 7 -------
>  .../devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml | 7 -------
>  .../devicetree/bindings/media/mediatek-jpeg-encoder.yaml   | 5 -----
>  3 files changed, 19 deletions(-)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 02/10] dt-bindings: media: mediatek,jpeg: Remove dma-ranges property

[Rob Herring]

On Wed, 08 Feb 2023 13:36:35 +0800, Yong Wu wrote:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges of the leaf node doesn't work. Remove
> it for jpeg here.
> 
> Currently there is only mt8195 jpeg node has this property in upstream,
> and it already uses parent-child node, this property did work. But instead,
> MediaTek iommu will control the masters' iova ranges by the master's
> larb/port id internally, then this property is unnecessary.
> 
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Cc: Bin Liu <bin.liu@mediatek.com>
> Cc: kyrie wu <kyrie.wu@mediatek.corp-partner.google.com>
> Cc: Xia Jiang <xia.jiang@mediatek.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  .../devicetree/bindings/media/mediatek,mt8195-jpegdec.yaml | 7 -------
>  .../devicetree/bindings/media/mediatek,mt8195-jpegenc.yaml | 7 -------
>  .../devicetree/bindings/media/mediatek-jpeg-encoder.yaml   | 5 -----
>  3 files changed, 19 deletions(-)
> 

Acked-by: Rob Herring <robh@kernel.org>


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Re: [PATCH v2 03/10] iommu/mediatek: Get regionid from larb/port id

[Yong Wu (吴勇)]

On Thu, 2023-02-09 at 14:39 +0100, AngeloGioacchino Del Regno wrote:
> Il 08/02/23 06:36, Yong Wu ha scritto:
> > After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> > controllers"), the dma-ranges is not allowed for dts leaf node.
> > but we still would like to separate to different masters
> > into different iova regions.
> > 
> > Thus we have to separate it by the HW larbid and portid. For
> > example,
> > larb1/2 are in region2 and larb3 is in region3. The problem is that
> > some ports inside a larb are in region4 while some ports inside
> > this
> > larb are in region5. Therefore I define a "larb_region_msk" to help
> > record the information for each a port. Take a example for a larb:
> >   [1] = ~0: means all ports in this larb are in region1;
> >   [2] = BIT(3) | BIT(4): means port3/4 in this larb are region2;
> >   [3] = ~(BIT(3) | BIT(4)): means all the other ports except
> > port3/4
> >                             in this larb are region3.
> > 
> > This method also avoids the users forget/abuse the iova regions.
> > 
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > ---
> >   drivers/iommu/mtk_iommu.c | 43 +++++++++++++++++++++-------------
> > -----
> >   1 file changed, 23 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> > index d5a4955910ff..fc3d9be120a0 100644
> > --- a/drivers/iommu/mtk_iommu.c
> > +++ b/drivers/iommu/mtk_iommu.c
> > @@ -8,7 +8,6 @@
> >   #include <linux/clk.h>
> >   #include <linux/component.h>
> >   #include <linux/device.h>
> > -#include <linux/dma-direct.h>
> >   #include <linux/err.h>
> >   #include <linux/interrupt.h>
> >   #include <linux/io.h>
> > @@ -194,6 +193,7 @@ struct mtk_iommu_plat_data {
> >   	enum mtk_iommu_plat	m4u_plat;
> >   	u32			flags;
> >   	u32			inv_sel_reg;
> > +	const u32		(*larb_region_msk)[32];
> 
> Can you please document this larb region mask in code, other than the
> commit
> description?
> 
> I can see this being essential for the next person reading this
> driver's code
> without digging through the commit history. At least some comment on
> top of
> the pointer, or on top of the struct declaration... and perhaps also
> describe
> briefly that the array is "indexed by region" (so 1 = region 1; 2 =
> region 2)
> and that the region index corresponds to the same index as
> `mtk_iommu_iova_region`.

Thanks for this suggestion. I will comment these in the code in next
version.

> 
> Before doing that, I'd like to check if anyone else has a better
> solution for
> that... because when looking at data for one of the SoCs in here, it
> looks a bit intimidating!
> 
> Copy-paste from patch [04/10] of this series for the reader's
> commodity:
> 
> static const unsigned int mt8195_larb_region_msk[][32] = {
> 	[0] = {~0, ~0, ~0, ~0},               /* Region0: all ports for
> larb0/1/2/3 */
> 	[1] = {0, 0, 0, 0, 0, 0, 0, 0,
> 	       0, 0, 0, 0, 0, 0, 0, 0,
> 	       0, 0, 0, ~0, ~0, ~0, ~0, ~0,   /* Region1:
> larb19/20/21/22/23/24 */
> 	       ~0},
> 	[2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0,    /* Region2: the other
> larbs. */
> 	       ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
> 	       ~0, ~0, 0, 0, 0, 0, 0, 0,
> 	       0, ~0, ~0, ~0, ~0},
> 	[3] = {0},
> 	[4] = {[18] = BIT(0) | BIT(1)},       /* Only larb18 port0/1 */
> 	[5] = {[18] = BIT(2) | BIT(3)},       /* Only larb18 port2/3 */
> };
> 
> ^^^^ That's what I actually mean by "intimidating"... :-P
> 
> It's just looks though, there's nothing much complicated here.

Thanks.

> 
> Regards,
> Angelo
> 
> 

Re: [PATCH v2 03/10] iommu/mediatek: Get regionid from larb/port id

[Yong Wu (吴勇)]

On Thu, 2023-02-09 at 14:39 +0100, AngeloGioacchino Del Regno wrote:
> Il 08/02/23 06:36, Yong Wu ha scritto:
> > After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> > controllers"), the dma-ranges is not allowed for dts leaf node.
> > but we still would like to separate to different masters
> > into different iova regions.
> > 
> > Thus we have to separate it by the HW larbid and portid. For
> > example,
> > larb1/2 are in region2 and larb3 is in region3. The problem is that
> > some ports inside a larb are in region4 while some ports inside
> > this
> > larb are in region5. Therefore I define a "larb_region_msk" to help
> > record the information for each a port. Take a example for a larb:
> >   [1] = ~0: means all ports in this larb are in region1;
> >   [2] = BIT(3) | BIT(4): means port3/4 in this larb are region2;
> >   [3] = ~(BIT(3) | BIT(4)): means all the other ports except
> > port3/4
> >                             in this larb are region3.
> > 
> > This method also avoids the users forget/abuse the iova regions.
> > 
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > ---
> >   drivers/iommu/mtk_iommu.c | 43 +++++++++++++++++++++-------------
> > -----
> >   1 file changed, 23 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> > index d5a4955910ff..fc3d9be120a0 100644
> > --- a/drivers/iommu/mtk_iommu.c
> > +++ b/drivers/iommu/mtk_iommu.c
> > @@ -8,7 +8,6 @@
> >   #include <linux/clk.h>
> >   #include <linux/component.h>
> >   #include <linux/device.h>
> > -#include <linux/dma-direct.h>
> >   #include <linux/err.h>
> >   #include <linux/interrupt.h>
> >   #include <linux/io.h>
> > @@ -194,6 +193,7 @@ struct mtk_iommu_plat_data {
> >   	enum mtk_iommu_plat	m4u_plat;
> >   	u32			flags;
> >   	u32			inv_sel_reg;
> > +	const u32		(*larb_region_msk)[32];
> 
> Can you please document this larb region mask in code, other than the
> commit
> description?
> 
> I can see this being essential for the next person reading this
> driver's code
> without digging through the commit history. At least some comment on
> top of
> the pointer, or on top of the struct declaration... and perhaps also
> describe
> briefly that the array is "indexed by region" (so 1 = region 1; 2 =
> region 2)
> and that the region index corresponds to the same index as
> `mtk_iommu_iova_region`.

Thanks for this suggestion. I will comment these in the code in next
version.

> 
> Before doing that, I'd like to check if anyone else has a better
> solution for
> that... because when looking at data for one of the SoCs in here, it
> looks a bit intimidating!
> 
> Copy-paste from patch [04/10] of this series for the reader's
> commodity:
> 
> static const unsigned int mt8195_larb_region_msk[][32] = {
> 	[0] = {~0, ~0, ~0, ~0},               /* Region0: all ports for
> larb0/1/2/3 */
> 	[1] = {0, 0, 0, 0, 0, 0, 0, 0,
> 	       0, 0, 0, 0, 0, 0, 0, 0,
> 	       0, 0, 0, ~0, ~0, ~0, ~0, ~0,   /* Region1:
> larb19/20/21/22/23/24 */
> 	       ~0},
> 	[2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0,    /* Region2: the other
> larbs. */
> 	       ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
> 	       ~0, ~0, 0, 0, 0, 0, 0, 0,
> 	       0, ~0, ~0, ~0, ~0},
> 	[3] = {0},
> 	[4] = {[18] = BIT(0) | BIT(1)},       /* Only larb18 port0/1 */
> 	[5] = {[18] = BIT(2) | BIT(3)},       /* Only larb18 port2/3 */
> };
> 
> ^^^^ That's what I actually mean by "intimidating"... :-P
> 
> It's just looks though, there's nothing much complicated here.

Thanks.

> 
> Regards,
> Angelo
> 
> 
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