[PATCH v6 00/33] MT8192 IOMMU support

Yong Wu
2021-01-11T11:20:12Z

This patch mainly adds support for mt8192 Multimedia IOMMU and SMI.

mt8192 also is MTK IOMMU gen2 which uses ARM Short-Descriptor translation
table format. The M4U-SMI HW diagram is as below:

EMI
|
M4U
|
------------
SMI Common
------------
|
+-------+------+------+----------------------+-------+
| | | | ...... | |
| | | | | |
larb0 larb1 larb2 larb4 ...... larb19 larb20
disp0 disp1 mdp vdec IPE IPE

All the connections are HW fixed, SW can NOT adjust it.

Comparing with the preview SoC, this patchset mainly adds two new functions:
a) add iova 34 bits support.
b) add multi domains support since several HW has the special iova
region requirement.

change note:
v6:a) base on v5.11-rc1. and tlb v4:
https://lore.kernel.org/linux-mediatek/20210107122909.16317-1-yong.wu@mediatek.com/T/#t
b) Remove the "domain id" definition in the binding header file.
Get the domain from dev->dma_range_map.
After this, Change many codes flow.
c) the patchset adds a new common file(mtk_smi-larb-port.h).
This version changes that name into mtk-memory-port.h which reflect
its file path. This only changes the file name. no other change.
thus I keep all the Reviewed-by Tags.
(another reason is that we will add some iommu ports unrelated with
smi-larb)
d) Refactor the power-domain flow suggestted by Tomasz.
e) Some other small fix. use different oas for different soc; Change the
macro for 34bit iova tlb flush.

v5: https://lore.kernel.org/linux-iommu/20201209080102.26626-1-yong.wu@mediatek.com/
a) Add a new patch for the header guard for smi-larb-port.h in [5/27].
b) Add a new patch for error handle for iommu_device_sysfs_add and
iommu_device_register[15/27].
c) Add a flag for the iova "ias == 34" case. the previous SoC still keep
32bits to save 16KB*3 lvl1 pgtable memory[13/27].
d) Add include <linux/bitfield.h> for FIELD_GET build fail.
e) In PM power domain patch, add a checking "pm_runtime_enabled" when call
pm_runtime_get_sync for non power-domain case. and add a pm_runtime_put_noidle
while pm_runtime_get_sync fail case.

v4: https://lore.kernel.org/linux-iommu/20201111123838.15682-1-yong.wu@mediatek.com/
a) rebase on v5.10-rc1
b) Move the smi part to a independent patchset.
c) Improve v7s code from Robin and Will.
d) Add a mediatek iommu entry patch in MAINTAIN.

v3: https://lore.kernel.org/linux-iommu/20200930070647.10188-1-yong.wu@mediatek.com/
a) Fix DT schema issue commented from Rob.
b) Fix a v7s issue. Use "_lvl" instead of "_l" in the macro(ARM_V7S_PTES_PER_LVL) since
it is called in ARM_V7S_LVL_IDX which has already used "_l".
c) Fix a PM suspend issue: Avoid pm suspend in pm runtime case.

v2: https://lore.kernel.org/linux-iommu/20200905080920.13396-1-yong.wu@mediatek.com/
a) Convert IOMMU/SMI dt-binding to DT schema.
b) Fix some comment from Pi-Hsun and Nicolas. like use
generic_iommu_put_resv_regions.
c) Reword some comment, like add how to use domain-id.

v1: https://lore.kernel.org/linux-iommu/20200711064846.16007-1-yong.wu@mediatek.com/

Yong Wu (33):
dt-bindings: iommu: mediatek: Convert IOMMU to DT schema
dt-bindings: memory: mediatek: Add a common memory header file
dt-bindings: memory: mediatek: Extend LARB_NR_MAX to 32
dt-bindings: memory: mediatek: Rename header guard for SMI header file
dt-bindings: mediatek: Add binding for mt8192 IOMMU
of/device: Move dma_range_map before of_iommu_configure
iommu: Avoid reallocate default domain for a group
iommu/mediatek: Use the common mtk-memory-port.h
iommu/io-pgtable-arm-v7s: Use ias to check the valid iova in unmap
iommu/io-pgtable-arm-v7s: Extend PA34 for MediaTek
iommu/io-pgtable-arm-v7s: Clarify LVL_SHIFT/BITS macro
iommu/io-pgtable-arm-v7s: Add cfg as a param in some macros
iommu/io-pgtable-arm-v7s: Quad lvl1 pgtable for MediaTek
iommu/mediatek: Add a flag for iova 34bits case
iommu/mediatek: Update oas for v7s
iommu/mediatek: Move hw_init into attach_device
iommu/mediatek: Add error handle for mtk_iommu_probe
iommu/mediatek: Add device link for smi-common and m4u
iommu/mediatek: Add pm runtime callback
iommu/mediatek: Add power-domain operation
iommu/mediatek: Support up to 34bit iova in tlb flush
iommu/mediatek: Support report iova 34bit translation fault in ISR
iommu/mediatek: Adjust the structure
iommu/mediatek: Move domain_finalise into attach_device
iommu/mediatek: Move geometry.aperture updating into domain_finalise
iommu/mediatek: Add iova_region structure
iommu/mediatek: Add get_domain_id from dev->dma_range_map
iommu/mediatek: Support for multi domains
iommu/mediatek: Add iova reserved function
iommu/mediatek: Support master use iova over 32bit
iommu/mediatek: Remove unnecessary check in attach_device
iommu/mediatek: Add mt8192 support
MAINTAINERS: Add entry for MediaTek IOMMU

.../bindings/iommu/mediatek,iommu.txt | 105 -----
.../bindings/iommu/mediatek,iommu.yaml | 183 +++++++++
MAINTAINERS | 9 +
drivers/iommu/io-pgtable-arm-v7s.c | 56 +--
drivers/iommu/iommu.c | 3 +-
drivers/iommu/mtk_iommu.c | 366 ++++++++++++++----
drivers/iommu/mtk_iommu.h | 12 +-
drivers/memory/mtk-smi.c | 8 +
drivers/of/device.c | 3 +-
include/dt-bindings/memory/mt2701-larb-port.h | 4 +-
include/dt-bindings/memory/mt2712-larb-port.h | 6 +-
include/dt-bindings/memory/mt6779-larb-port.h | 6 +-
include/dt-bindings/memory/mt8167-larb-port.h | 6 +-
include/dt-bindings/memory/mt8173-larb-port.h | 6 +-
include/dt-bindings/memory/mt8183-larb-port.h | 6 +-
include/dt-bindings/memory/mt8192-larb-port.h | 243 ++++++++++++
include/dt-bindings/memory/mtk-memory-port.h | 15 +
include/linux/io-pgtable.h | 4 +-
include/soc/mediatek/smi.h | 3 +-
19 files changed, 810 insertions(+), 234 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
create mode 100644 Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
create mode 100644 include/dt-bindings/memory/mt8192-larb-port.h
create mode 100644 include/dt-bindings/memory/mtk-memory-port.h

--
2.18.0