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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-09 15:03:24 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-09 15:03:24 -0700 |
commit | 4dfc2788033d30dfccfd4268e06dd73ce2c654ed (patch) | |
tree | f6675b959f4aa12e64e68383874683c4cea46334 /drivers/iommu/rockchip-iommu.c | |
parent | a59e57da49f7c3f3de8cf4b7568a0c6c82f5b242 (diff) | |
parent | 47b59d8e40850a05370ee9198ea5e505d89489f1 (diff) | |
download | talos-op-linux-4dfc2788033d30dfccfd4268e06dd73ce2c654ed.tar.gz talos-op-linux-4dfc2788033d30dfccfd4268e06dd73ce2c654ed.zip |
Merge tag 'iommu-updates-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
"Slightly more changes than usual this time:
- KDump Kernel IOMMU take-over code for AMD IOMMU. The code now tries
to preserve the mappings of the kernel so that master aborts for
devices are avoided. Master aborts cause some devices to fail in
the kdump kernel, so this code makes the dump more likely to
succeed when AMD IOMMU is enabled.
- common flush queue implementation for IOVA code users. The code is
still optional, but AMD and Intel IOMMU drivers had their own
implementation which is now unified.
- finish support for iommu-groups. All drivers implement this feature
now so that IOMMU core code can rely on it.
- finish support for 'struct iommu_device' in iommu drivers. All
drivers now use the interface.
- new functions in the IOMMU-API for explicit IO/TLB flushing. This
will help to reduce the number of IO/TLB flushes when IOMMU drivers
support this interface.
- support for mt2712 in the Mediatek IOMMU driver
- new IOMMU driver for QCOM hardware
- system PM support for ARM-SMMU
- shutdown method for ARM-SMMU-v3
- some constification patches
- various other small improvements and fixes"
* tag 'iommu-updates-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (87 commits)
iommu/vt-d: Don't be too aggressive when clearing one context entry
iommu: Introduce Interface for IOMMU TLB Flushing
iommu/s390: Constify iommu_ops
iommu/vt-d: Avoid calling virt_to_phys() on null pointer
iommu/vt-d: IOMMU Page Request needs to check if address is canonical.
arm/tegra: Call bus_set_iommu() after iommu_device_register()
iommu/exynos: Constify iommu_ops
iommu/ipmmu-vmsa: Make ipmmu_gather_ops const
iommu/ipmmu-vmsa: Rereserving a free context before setting up a pagetable
iommu/amd: Rename a few flush functions
iommu/amd: Check if domain is NULL in get_domain() and return -EBUSY
iommu/mediatek: Fix a build warning of BIT(32) in ARM
iommu/mediatek: Fix a build fail of m4u_type
iommu: qcom: annotate PM functions as __maybe_unused
iommu/pamu: Fix PAMU boot crash
memory: mtk-smi: Degrade SMI init to module_init
iommu/mediatek: Enlarge the validate PA range for 4GB mode
iommu/mediatek: Disable iommu clock when system suspend
iommu/mediatek: Move pgtable allocation into domain_alloc
iommu/mediatek: Merge 2 M4U HWs into one iommu domain
...
Diffstat (limited to 'drivers/iommu/rockchip-iommu.c')
-rw-r--r-- | drivers/iommu/rockchip-iommu.c | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 4ba48a26b389..9d991c2d8767 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -90,7 +90,9 @@ struct rk_iommu { struct device *dev; void __iomem **bases; int num_mmu; - int irq; + int *irq; + int num_irq; + bool reset_disabled; struct iommu_device iommu; struct list_head node; /* entry in rk_iommu_domain.iommus */ struct iommu_domain *domain; /* domain to which iommu is attached */ @@ -414,6 +416,9 @@ static int rk_iommu_force_reset(struct rk_iommu *iommu) int ret, i; u32 dte_addr; + if (iommu->reset_disabled) + return 0; + /* * Check if register DTE_ADDR is working by writing DTE_ADDR_DUMMY * and verifying that upper 5 nybbles are read back. @@ -825,10 +830,12 @@ static int rk_iommu_attach_device(struct iommu_domain *domain, iommu->domain = domain; - ret = devm_request_irq(iommu->dev, iommu->irq, rk_iommu_irq, - IRQF_SHARED, dev_name(dev), iommu); - if (ret) - return ret; + for (i = 0; i < iommu->num_irq; i++) { + ret = devm_request_irq(iommu->dev, iommu->irq[i], rk_iommu_irq, + IRQF_SHARED, dev_name(dev), iommu); + if (ret) + return ret; + } for (i = 0; i < iommu->num_mmu; i++) { rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, @@ -878,7 +885,8 @@ static void rk_iommu_detach_device(struct iommu_domain *domain, } rk_iommu_disable_stall(iommu); - devm_free_irq(iommu->dev, iommu->irq, iommu); + for (i = 0; i < iommu->num_irq; i++) + devm_free_irq(iommu->dev, iommu->irq[i], iommu); iommu->domain = NULL; @@ -1008,20 +1016,20 @@ static int rk_iommu_group_set_iommudata(struct iommu_group *group, ret = of_parse_phandle_with_args(np, "iommus", "#iommu-cells", 0, &args); if (ret) { - dev_err(dev, "of_parse_phandle_with_args(%s) => %d\n", - np->full_name, ret); + dev_err(dev, "of_parse_phandle_with_args(%pOF) => %d\n", + np, ret); return ret; } if (args.args_count != 0) { - dev_err(dev, "incorrect number of iommu params found for %s (found %d, expected 0)\n", - args.np->full_name, args.args_count); + dev_err(dev, "incorrect number of iommu params found for %pOF (found %d, expected 0)\n", + args.np, args.args_count); return -EINVAL; } pd = of_find_device_by_node(args.np); of_node_put(args.np); if (!pd) { - dev_err(dev, "iommu %s not found\n", args.np->full_name); + dev_err(dev, "iommu %pOF not found\n", args.np); return -EPROBE_DEFER; } @@ -1157,12 +1165,28 @@ static int rk_iommu_probe(struct platform_device *pdev) if (iommu->num_mmu == 0) return PTR_ERR(iommu->bases[0]); - iommu->irq = platform_get_irq(pdev, 0); - if (iommu->irq < 0) { - dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq); + iommu->num_irq = platform_irq_count(pdev); + if (iommu->num_irq < 0) + return iommu->num_irq; + if (iommu->num_irq == 0) return -ENXIO; + + iommu->irq = devm_kcalloc(dev, iommu->num_irq, sizeof(*iommu->irq), + GFP_KERNEL); + if (!iommu->irq) + return -ENOMEM; + + for (i = 0; i < iommu->num_irq; i++) { + iommu->irq[i] = platform_get_irq(pdev, i); + if (iommu->irq[i] < 0) { + dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq[i]); + return -ENXIO; + } } + iommu->reset_disabled = device_property_read_bool(dev, + "rockchip,disable-mmu-reset"); + err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev)); if (err) return err; |