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Commit 8e15c568 authored by Olav Haugan's avatar Olav Haugan
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iommu: msm: Move location of local iommu halt 



During iommu detach we do a local iommu halt to ensure certain
registers are atomically updated. However, the local iommu halt
is taken at a larger scope than needed. Reduce the scope of this
halt. This will help with performance when detaching a context bank
from an iommu that has another context bank in use.

Change-Id: Id7630bd73a71d38ee987bd0f19cc8e06c725a7c1
Signed-off-by: default avatarOlav Haugan <ohaugan@codeaurora.org>
parent 22b9645b

drivers/iommu/msm_iommu-v1.c

+4 −5
Original line number Diff line number Diff line
@@ -899,16 +899,15 @@ static void msm_iommu_detach_dev(struct iommu_domain *domain, 
	iommu_drvdata->asid[ctx_drvdata->asid - 1]--;

	ctx_drvdata->asid = -1;



	iommu_halt(iommu_drvdata);



	__reset_context(iommu_drvdata->cb_base, ctx_drvdata->num);



	/*

	 * Only reset the M2V tables on the very last detach */

	if (!is_secure && iommu_drvdata->ctx_attach_count == 1)

	if (!is_secure && iommu_drvdata->ctx_attach_count == 1) {

		iommu_halt(iommu_drvdata);

		__release_smg(iommu_drvdata->base);



		iommu_resume(iommu_drvdata);

	}



	__disable_clocks(iommu_drvdata);