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Commit d9853f27 authored by Skylar Chang's avatar Skylar Chang
Browse files

msm: ipa: map MHI doorbells to IPA uC 



Map MHI doorbell registers to IPA uC SMMU context bank
to allow IPA uC to access MHI doorbells.

Change-Id: Ic6ee808e184d8d9ad6fe218e353b75f0caf3c721
Acked-by: default avatarAdy Abraham <adya@qti.qualcomm.com>
Signed-off-by: default avatarSkylar Chang <chiaweic@codeaurora.org>
parent 9830dd24

drivers/platform/msm/ipa/ipa_v3/ipa_mhi_proxy.c

+35 −0
Original line number Diff line number Diff line
@@ -681,6 +681,20 @@ static void imp_mhi_shutdown(void) 
			imp_ctx->lpm_disabled = false;

		}



		/* unmap MHI doorbells from IPA uC SMMU */

		if (!ipa3_ctx->s1_bypass_arr[IPA_SMMU_CB_UC]) {

			struct ipa_smmu_cb_ctx *cb =

				ipa3_get_smmu_ctx(IPA_SMMU_CB_UC);

			unsigned long iova_p;

			phys_addr_t pa_p;

			u32 size_p;



			imp_smmu_round_to_page(imp_ctx->dev_info.chdb_base,

				imp_ctx->dev_info.chdb_base, PAGE_SIZE,

				&iova_p, &pa_p, &size_p);



			iommu_unmap(cb->mapping->domain, iova_p, size_p);

		}

	}

	imp_ctx->state = IMP_PROBED;
@@ -768,6 +782,27 @@ static int imp_mhi_probe_cb(struct mhi_device *mhi_dev, 
	IMP_DBG("mapped ch db 0x%pad to mbox %d\n", &ev->props.doorbell,

		ev->props.uc_mbox_n);



	/*

	 * Map MHI doorbells to IPA uC SMMU.

	 * Both channel and event doorbells resides in a single page.

	 */

	if (!ipa3_ctx->s1_bypass_arr[IPA_SMMU_CB_UC]) {

		struct ipa_smmu_cb_ctx *cb =

			ipa3_get_smmu_ctx(IPA_SMMU_CB_UC);

		unsigned long iova_p;

		phys_addr_t pa_p;

		u32 size_p;



		imp_smmu_round_to_page(imp_ctx->dev_info.chdb_base,

			imp_ctx->dev_info.chdb_base, PAGE_SIZE,

			&iova_p, &pa_p, &size_p);



		ret = ipa3_iommu_map(cb->mapping->domain, iova_p, pa_p, size_p,

			IOMMU_READ | IOMMU_WRITE | IOMMU_MMIO);

		if (ret)

			goto fail;

	}



	imp_mhi_trigger_ready_ind();



	mutex_unlock(&imp_ctx->mutex);