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path: root/drivers/iommu/mtk_iommu.c
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2020-07-29Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', ↵Joerg Roedel
'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2020-07-24iommu: Add gfp parameter to io_pgtable_ops->map()Baolin Wang
Now the ARM page tables are always allocated by GFP_ATOMIC parameter, but the iommu_ops->map() function has been added a gfp_t parameter by commit 781ca2de89ba ("iommu: Add gfp parameter to iommu_ops::map"), thus io_pgtable_ops->map() should use the gfp parameter passed from iommu_ops->map() to allocate page pages, which can avoid wasting the memory allocators atomic pools for some non-atomic contexts. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/3093df4cb95497aaf713fca623ce4ecebb197c2e.1591930156.git.baolin.wang@linux.alibaba.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Add mt6779 basic supportChao Hao
1. Start from mt6779, INVLDT_SEL move to offset=0x2c, so we add REG_MMU_INV_SEL_GEN2 definition and mt6779 uses it. 2. Add mt6779_data to support mm_iommu HW init. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Yong Wu <yong.wu@mediatek.com> Link: https://lore.kernel.org/r/20200703044127.27438-11-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Modify MMU_CTRL register settingChao Hao
The MMU_CTRL register of MT8173 is different from other SoCs. The in_order_wr_en is bit[9] which is zero by default. Other SoCs have the vitcim_tlb_en feature mapped to bit[12]. This bit is set to one by default. We need to preserve the bit when setting F_MMU_TF_PROT_TO_PROGRAM_ADDR as otherwise the bit will be cleared and IOMMU performance will drop. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Yong Wu <yong.wu@mediatek.com> Link: https://lore.kernel.org/r/20200703044127.27438-10-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Extend protect pa alignment valueChao Hao
Starting with mt6779, iommu needs to extend to 256 bytes from 128 bytes which can send the max number of data for memory protection pa alignment. So we can use a separate patch to modify it. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20200703044127.27438-9-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Add REG_MMU_WR_LEN_CTRL register definitionChao Hao
Some platforms(ex: mt6779) need to improve performance by setting REG_MMU_WR_LEN_CTRL register. And we can use WR_THROT_EN macro to control whether we need to set the register. If the register uses default value, iommu will send command to EMI without restriction, when the number of commands become more and more, it will drop the EMI performance. So when more than ten_commands(default value) don't be handled for EMI, iommu will stop send command to EMI for keeping EMI's performace by enabling write throttling mechanism(bit[5][21]=0) in MMU_WR_LEN_CTRL register. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20200703044127.27438-8-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Add sub_comm id in translation faultChao Hao
The max larb number that a iommu HW support is 8(larb0~larb7 in the below diagram). If the larb's number is over 8, we use a sub_common for merging several larbs into one larb. At this case, we will extend larb_id: bit[11:9] means common-id; bit[8:7] means subcommon-id; >From these two variables, we could get the real larb number when translation fault happen. The diagram is as below: EMI | IOMMU | ----------------- | | common1 common0 | | ----------------- | smi common | ------------------------------------ | | | | | | 3'd0 3'd1 3'd2 3'd3 ... 3'd7 <-common_id(max is 8) | | | | | | Larb0 Larb1 | Larb3 ... Larb7 | smi sub common | -------------------------- | | | | 2'd0 2'd1 2'd2 2'd3 <-sub_common_id(max is 4) | | | | Larb8 Larb9 Larb10 Larb11 In this patch we extend larb_remap[] to larb_remap[8][4] for this. larb_remap[x][y]: x means common-id above, y means subcommon_id above. We can also distinguish if the M4U HW has sub_common by HAS_SUB_COMM macro. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20200703044127.27438-7-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Move inv_sel_reg into the plat_dataChao Hao
For mt6779, MMU_INV_SEL register's offset is changed from 0x38 to 0x2c, so we can put inv_sel_reg in the plat_data to use it. In addition, we renamed it to REG_MMU_INV_SEL_GEN1 and use it before mt6779. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Yong Wu <yong.wu@mediatek.com> Link: https://lore.kernel.org/r/20200703044127.27438-6-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Setting MISC_CTRL registerChao Hao
Add F_MMU_IN_ORDER_WR_EN_MASK and F_MMU_STANDARD_AXI_MODE_EN_MASK definitions in MISC_CTRL register. F_MMU_STANDARD_AXI_MODE_EN_MASK: If we set F_MMU_STANDARD_AXI_MODE_EN_MASK (bit[3][19] = 0, not follow standard AXI protocol), the iommu will priorize sending of urgent read command over a normal read command. This improves the performance. F_MMU_IN_ORDER_WR_EN_MASK: If we set F_MMU_IN_ORDER_WR_EN_MASK (bit[1][17] = 0, out-of-order write), the iommu will re-order write commands and send the write commands with higher priority. Otherwise the sending of write commands will be done in order. The feature is controlled by OUT_ORDER_WR_EN platform data flag. Suggested-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20200703044127.27438-5-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Use a u32 flags to describe different HW featuresChao Hao
Given the fact that we are adding more and more plat_data bool values, it would make sense to use a u32 flags register and add the appropriate macro definitions to set and check for a flag present. No functional change. Suggested-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Yong Wu <yong.wu@mediatek.com> Link: https://lore.kernel.org/r/20200703044127.27438-4-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-07-10iommu/mediatek: Rename the register STANDARD_AXI_MODE(0x48) to MISC_CTRLChao Hao
For iommu offset=0x48 register, only the previous mt8173/mt8183 use the name STANDARD_AXI_MODE, all the latest SoC extend the register more feature by different bits, for example: axi_mode, in_order_en, coherent_en and so on. So rename REG_MMU_MISC_CTRL may be more proper. This patch only rename the register name, no functional change. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Reviewed-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20200703044127.27438-3-chao.hao@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-05-05iommu/mediatek: Convert to probe/release_device() call-backsJoerg Roedel
Convert the Mediatek IOMMU driver to use the probe_device() and release_device() call-backs of iommu_ops, so that the iommu core code does the group and sysfs setup. Signed-off-by: Joerg Roedel <jroedel@suse.de> Link: https://lore.kernel.org/r/20200429133712.31431-23-joro@8bytes.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-03-27iommu/mediatek: Use accessor functions for iommu private dataJoerg Roedel
Make use of dev_iommu_priv_set/get() functions. Signed-off-by: Joerg Roedel <jroedel@suse.de> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Link: https://lore.kernel.org/r/20200326150841.10083-14-joro@8bytes.org
2020-01-10iommu/io-pgtable-arm: Rationalise TTBRn handlingRobin Murphy
TTBR1 values have so far been redundant since no users implement any support for split address spaces. Crucially, though, one of the main reasons for wanting to do so is to be able to manage each half entirely independently, e.g. context-switching one set of mappings without disturbing the other. Thus it seems unlikely that tying two tables together in a single io_pgtable_cfg would ever be particularly desirable or useful. Streamline the configs to just a single conceptual TTBR value representing the allocated table. This paves the way for future users to support split address spaces by simply allocating a table and dealing with the detailed TTBRn logistics themselves. Tested-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Robin Murphy <robin.murphy@arm.com> [will: Drop change to ttbr value] Signed-off-by: Will Deacon <will@kernel.org>
2019-11-12Merge branches 'iommu/fixes', 'arm/qcom', 'arm/renesas', 'arm/rockchip', ↵Joerg Roedel
'arm/mediatek', 'arm/tegra', 'arm/smmu', 'x86/amd', 'x86/vt-d', 'virtio' and 'core' into next
2019-11-11iommu/mediatek: Reduce the tlb flush timeout valueYong Wu
Reduce the tlb timeout value from 100000us to 1000us. The original value would make the kernel stuck for 100 ms with interrupts disabled, which could have other side effects. The flush is expected to always take much less than 1 ms, so use that instead. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-11-11iommu/mediatek: Get rid of the pgtlockYong Wu
Now we have tlb_lock for the HW tlb flush, then pgtable code hasn't needed the external "pgtlock" for a while. this patch remove the "pgtlock". Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-11-11iommu/mediatek: Move the tlb_sync into tlb_flushYong Wu
Right now, the tlb_add_flush_nosync and tlb_sync always appear together. we merge the two functions into one(also move the tlb_lock into the new function). No functional change. Signed-off-by: Chao Hao <chao.hao@mediatek.com> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-11-11iommu/mediatek: Delete the leaf in the tlb_flushYong Wu
In our tlb range flush, we don't care the "leaf". Remove it to simplify the code. no functional change. "granule" also is unnecessary for us, Keep it satisfy the format of tlb_flush_walk. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-11-11iommu/mediatek: Use gather to achieve the tlb range flushYong Wu
Use the iommu_gather mechanism to achieve the tlb range flush. Gather the iova range in the "tlb_add_page", then flush the merged iova range in iotlb_sync. Suggested-by: Tomasz Figa <tfiga@chromium.org> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-11-11iommu/mediatek: Add a new tlb_lock for tlb_flushYong Wu
The commit 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API TLB sync") help move the tlb_sync of unmap from v7s into the iommu framework. It helps add a new function "mtk_iommu_iotlb_sync", But it lacked the lock, then it will cause the variable "tlb_flush_active" may be changed unexpectedly, we could see this warning log randomly: mtk-iommu 10205000.iommu: Partial TLB flush timed out, falling back to full flush The HW requires tlb_flush/tlb_sync in pairs strictly, this patch adds a new tlb_lock for tlb operations to fix this issue. Fixes: 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API TLB sync") Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-11-11iommu/mediatek: Correct the flush_iotlb_all callbackYong Wu
Use the correct tlb_flush_all instead of the original one. Fixes: 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API TLB sync") Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-10-15iommu: Add gfp parameter to iommu_ops::mapTom Murphy
Add a gfp_t parameter to the iommu_ops::map function. Remove the needless locking in the AMD iommu driver. The iommu_ops::map function (or the iommu_map function which calls it) was always supposed to be sleepable (according to Joerg's comment in this thread: https://lore.kernel.org/patchwork/patch/977520/ ) and so should probably have had a "might_sleep()" since it was written. However currently the dma-iommu api can call iommu_map in an atomic context, which it shouldn't do. This doesn't cause any problems because any iommu driver which uses the dma-iommu api uses gfp_atomic in it's iommu_ops::map function. But doing this wastes the memory allocators atomic pools. Signed-off-by: Tom Murphy <murphyt7@tcd.ie> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-30Merge branch 'arm/smmu' into arm/mediatekJoerg Roedel
2019-08-30iommu/mediatek: Clean up struct mtk_smi_iommuYong Wu
Remove the "struct mtk_smi_iommu" to simplify the code since it has only one item in it right now. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-30memory: mtk-smi: Get rid of need_larbidYong Wu
The "mediatek,larb-id" has already been parsed in MTK IOMMU driver. It's no need to parse it again in SMI driver. Only clean some codes. This patch is fit for all the current mt2701, mt2712, mt7623, mt8173 and mt8183. After this patch, the "mediatek,larb-id" only be needed for mt2712 which have 2 M4Us. In the other SoCs, we can get the larb-id from M4U in which the larbs in the "mediatek,larbs" always are ordered. Correspondingly, the larb_nr in the "struct mtk_smi_iommu" could also be deleted. 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>
2019-08-30iommu/mediatek: Fix VLD_PA_RNG register backup when suspendYong Wu
The register VLD_PA_RNG(0x118) was forgot to backup while adding 4GB mode support for mt2712. this patch add it. Fixes: 30e2fccf9512 ("iommu/mediatek: Enlarge the validate PA range for 4GB mode") 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>
2019-08-30iommu/mediatek: Add mmu1 supportYong Wu
Normally the M4U HW connect EMI with smi. the diagram is like below: EMI | M4U | smi-common | ----------------- | | | | ... larb0 larb1 larb2 larb3 Actually there are 2 mmu cells in the M4U HW, like this diagram: EMI --------- | | mmu0 mmu1 <- M4U | | --------- | smi-common | ----------------- | | | | ... larb0 larb1 larb2 larb3 This patch add support for mmu1. In order to get better performance, we could adjust some larbs go to mmu1 while the others still go to mmu0. This is controlled by a SMI COMMON register SMI_BUS_SEL(0x220). mt2712, mt8173 and mt8183 M4U HW all have 2 mmu cells. the default value of that register is 0 which means all the larbs go to mmu0 defaultly. This is a preparing patch for adjusting SMI_BUS_SEL for mt8183. 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>
2019-08-30iommu/mediatek: Add mt8183 IOMMU supportYong Wu
The M4U IP blocks in mt8183 is MediaTek's generation2 M4U which use the ARM Short-descriptor like mt8173, and most of the HW registers are the same. Here list main differences between mt8183 and mt8173/mt2712: 1) mt8183 has only one M4U HW like mt8173 while mt2712 has two. 2) mt8183 don't have the "bclk" clock, it use the EMI clock instead. 3) mt8183 can support the dram over 4GB, but it doesn't call this "4GB mode". 4) mt8183 pgtable base register(0x0) extend bit[1:0] which represent the bit[33:32] in the physical address of the pgtable base, But the standard ttbr0[1] means the S bit which is enabled defaultly, Hence, we add a mask. 5) mt8183 HW has a GALS modules, SMI should enable "has_gals" support. 6) mt8183 need reset_axi like mt8173. 7) the larb-id in smi-common is remapped. M4U should add its larbid_remap. 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>
2019-08-30iommu/mediatek: Move vld_pa_rng into plat_dataYong Wu
Both mt8173 and mt8183 don't have this vld_pa_rng(valid physical address range) register while mt2712 have. Move it into the plat_data. 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>
2019-08-30iommu/mediatek: Move reset_axi into plat_dataYong Wu
In mt8173 and mt8183, 0x48 is REG_MMU_STANDARD_AXI_MODE while it is REG_MMU_CTRL in the other SoCs, and the bits meaning is completely different with the REG_MMU_STANDARD_AXI_MODE. This patch moves this property to plat_data, it's also 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>
2019-08-30iommu/mediatek: Refine protect memory definitionYong Wu
The protect memory setting is a little different in the different SoCs. In the register REG_MMU_CTRL_REG(0x110), the TF_PROT(translation fault protect) shift bit is normally 4 while it shift 5 bits only in the mt8173. This patch delete the complex MACRO and use a common if-else instead. 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>
2019-08-30iommu/mediatek: Add larb-id remapped supportYong Wu
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>
2019-08-30iommu/mediatek: Add bclk can be supported optionallyYong Wu
In some SoCs, M4U doesn't have its "bclk", it will use the EMI clock instead which has always been enabled when entering kernel. Currently mt2712 and mt8173 have this bclk while mt8183 doesn't. This also is a preparing patch for mt8183. 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>
2019-08-30iommu/mediatek: Adjust the PA for the 4GB ModeYong Wu
After extending the v7s support PA[33:32] for MediaTek, we have to adjust the PA ourself for the 4GB mode. In the 4GB Mode, the PA will remap like this: CPU PA -> M4U output PA 0x4000_0000 0x1_4000_0000 (Add bit32) 0x8000_0000 0x1_8000_0000 ... 0xc000_0000 0x1_c000_0000 ... 0x1_0000_0000 0x1_0000_0000 (No change) 1) Always add bit32 for CPU PA in ->map. 2) Discard the bit32 in iova_to_phys if PA > 0x1_4000_0000 since the iommu consumer always use the CPU PA. Besides, the "oas" always is set to 34 since v7s has already supported our case. Both mt2712 and mt8173 support this "4GB mode" while the mt8183 don't. The PA in mt8183 won't remap. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-30iommu/io-pgtable-arm-v7s: Rename the quirk from MTK_4GB to MTK_EXTYong Wu
In previous mt2712/mt8173, MediaTek extend the v7s to support 4GB dram. But in the latest mt8183, We extend it to support the PA up to 34bit. Then the "MTK_4GB" name is not so fit, This patch only change the quirk name to "MTK_EXT". Signed-off-by: Yong Wu <yong.wu@mediatek.com> Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-30iommu/mediatek: Fix iova_to_phys PA start for 4GB modeYong Wu
In M4U 4GB mode, the physical address is remapped as below: CPU Physical address: ==================== 0 1G 2G 3G 4G 5G |---A---|---B---|---C---|---D---|---E---| +--I/O--+------------Memory-------------+ IOMMU output physical address: ============================= 4G 5G 6G 7G 8G |---E---|---B---|---C---|---D---| +------------Memory-------------+ The Region 'A'(I/O) can not be mapped by M4U; For Region 'B'/'C'/'D', the bit32 of the CPU physical address always is needed to set, and for Region 'E', the CPU physical address keep as is. something looks like this: CPU PA -> M4U OUTPUT PA 0x4000_0000 0x1_4000_0000 (Add bit32) 0x8000_0000 0x1_8000_0000 ... 0xc000_0000 0x1_c000_0000 ... 0x1_0000_0000 0x1_0000_0000 (No change) Additionally, the iommu consumers always use the CPU phyiscal address. The PA in the iova_to_phys that is got from v7s always is u32, But from the CPU point of view, PA only need add BIT(32) when PA < 0x4000_0000. Fixes: 30e2fccf9512 ("iommu/mediatek: Enlarge the validate PA range for 4GB mode") Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-30iommu/mediatek: Use a struct as the platform dataYong Wu
Use a struct as the platform special data instead of the enumeration. This is a prepare patch for adding mt8183 iommu support. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-07-29iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->tlb_add_page()Will Deacon
With all the pieces in place, we can finally propagate the iommu_iotlb_gather structure from the call to unmap() down to the IOMMU drivers' implementation of ->tlb_add_page(). Currently everybody ignores it, but the machinery is now there to defer invalidation. Signed-off-by: Will Deacon <will@kernel.org>
2019-07-29iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->unmap()Will Deacon
Update the io-pgtable ->unmap() function to take an iommu_iotlb_gather pointer as an argument, and update the callers as appropriate. Signed-off-by: Will Deacon <will@kernel.org>
2019-07-29iommu/io-pgtable: Remove unused ->tlb_sync() callbackWill Deacon
The ->tlb_sync() callback is no longer used, so it can be removed. Signed-off-by: Will Deacon <will@kernel.org>
2019-07-29iommu/io-pgtable: Replace ->tlb_add_flush() with ->tlb_add_page()Will Deacon
The ->tlb_add_flush() callback in the io-pgtable API now looks a bit silly: - It takes a size and a granule, which are always the same - It takes a 'bool leaf', which is always true - It only ever flushes a single page With that in mind, replace it with an optional ->tlb_add_page() callback that drops the useless parameters. Signed-off-by: Will Deacon <will@kernel.org>
2019-07-29iommu/io-pgtable: Hook up ->tlb_flush_walk() and ->tlb_flush_leaf() in driversWill Deacon
Hook up ->tlb_flush_walk() and ->tlb_flush_leaf() in drivers using the io-pgtable API so that we can start making use of them in the page-table code. For now, they can just wrap the implementations of ->tlb_add_flush and ->tlb_sync pending future optimisation in each driver. Signed-off-by: Will Deacon <will@kernel.org>
2019-07-29iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync()Will Deacon
To allow IOMMU drivers to batch up TLB flushing operations and postpone them until ->iotlb_sync() is called, extend the prototypes for the ->unmap() and ->iotlb_sync() IOMMU ops callbacks to take a pointer to the current iommu_iotlb_gather structure. All affected IOMMU drivers are updated, but there should be no functional change since the extra parameter is ignored for now. Signed-off-by: Will Deacon <will@kernel.org>
2019-07-24iommu/io-pgtable: Rename iommu_gather_ops to iommu_flush_opsWill Deacon
In preparation for TLB flush gathering in the IOMMU API, rename the iommu_gather_ops structure in io-pgtable to iommu_flush_ops, which better describes its purpose and avoids the potential for confusion between different levels of the API. $ find linux/ -type f -name '*.[ch]' | xargs sed -i 's/gather_ops/flush_ops/g' Signed-off-by: Will Deacon <will@kernel.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-26iommu/mediatek: Fix leaked of_node referencesWen Yang
The call to of_parse_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. 581 static int mtk_iommu_probe(struct platform_device *pdev) 582 { ... 626 for (i = 0; i < larb_nr; i++) { 627 struct device_node *larbnode; ... 631 larbnode = of_parse_phandle(...); 632 if (!larbnode) 633 return -EINVAL; 634 635 if (!of_device_is_available(larbnode)) 636 continue; ---> leaked here 637 ... 643 if (!plarbdev) 644 return -EPROBE_DEFER; ---> leaked here ... 647 component_match_add_release(dev, &match, release_of, 648 compare_of, larbnode); ---> release_of will call of_node_put 649 } ... 650 Detected by coccinelle with the following warnings: ./drivers/iommu/mtk_iommu.c:644:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 631, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Joerg Roedel <joro@8bytes.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: iommu@lists.linux-foundation.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-12-20Merge branches 'iommu/fixes', 'arm/renesas', 'arm/mediatek', 'arm/tegra', ↵Joerg Roedel
'arm/omap', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next
2018-12-17iommu/mediatek: Use helper functions to access dev->iommu_fwspecJoerg Roedel
Use the new helpers dev_iommu_fwspec_get()/set() to access the dev->iommu_fwspec pointer. This makes it easier to move that pointer later into another struct. Cc: Matthias Brugger <matthias.bgg@gmail.com> Tested-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-11-06iommu/mediatek: Constify iommu_opsArvind Yadav
iommu_ops are not supposed to change at runtime. Functions 'iommu_device_set_ops' and 'bus_set_iommu' working with const iommu_ops provided by <linux/iommu.h>. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Yong Wu <yong.wu@mediatek.com> (Change the title to iommu/mediatek: xx) Signed-off-by: Joerg Roedel <jroedel@suse.de>
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