evie/android_kernel_oneplus_msm8998
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iommu/arm-smmu: Do a local halt around impl def programming

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As per the hardware spec, the SMMU must be halted during programming of
the implementation defined registers.  Add the missing halt.

Change-Id: Id28b546e5b5b646c263d7431a32f3c95ed3f2042
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-08-19 12:13:28 -07:00 • committed by David Keitel
parent 763858dfbc
commit 00e29d6f33
1 changed files with 5 additions and 0 deletions
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5
drivers/iommu/arm-smmu.c
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@ -1663,14 +1663,19 @@ static void arm_smmu_domain_remove_master(struct arm_smmu_domain *smmu_domain,
arm_smmu_disable_clocks(smmu);
}
static int arm_smmu_halt(struct arm_smmu_device *smmu);
static void arm_smmu_resume(struct arm_smmu_device *smmu);
static void arm_smmu_impl_def_programming(struct arm_smmu_device *smmu)
{
int i;
struct arm_smmu_impl_def_reg *regs = smmu->impl_def_attach_registers;
arm_smmu_halt(smmu);
for (i = 0; i < smmu->num_impl_def_attach_registers; ++i)
writel_relaxed(regs[i].value,
ARM_SMMU_GR0(smmu) + regs[i].offset);
arm_smmu_resume(smmu);
}
static void arm_smmu_device_reset(struct arm_smmu_device *smmu);