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From: Eric Auger <eric.auger@linaro.org>
To: eric.auger@st.com, eric.auger@linaro.org, robin.murphy@arm.com,
	alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org,
	tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com,
	christoffer.dall@linaro.org,
	linux-arm-kernel@lists.infradead.org
Cc: patches@linaro.org, linux-kernel@vger.kernel.org,
	Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com,
	p.fedin@samsung.com, iommu@lists.linux-foundation.org,
	Jean-Philippe.Brucker@arm.com, julien.grall@arm.com,
	yehuday@marvell.com
Subject: [PATCH v9 2/8] iommu/arm-smmu: initialize the msi geometry and advertise iommu-msi support
Date: Wed,  4 May 2016 11:40:01 +0000	[thread overview]
Message-ID: <1462362007-2753-3-git-send-email-eric.auger@linaro.org> (raw)
In-Reply-To: <1462362007-2753-1-git-send-email-eric.auger@linaro.org>

On ARM, MSI write transactions from device upstream to the smmu
are conveyed through the iommu. Therefore target physical addresses
must be mapped and DOMAIN_ATTR_MSI_GEOMETRY advertises the support of
the IOMMU-MSI API.

Signed-off-by: Eric Auger <eric.auger@linaro.org>

---
v8 -> v9:
- reword the title and patch description

v7 -> v8:
- use DOMAIN_ATTR_MSI_GEOMETRY

v4 -> v5:
- don't handle fsl_pamu_domain anymore
- handle arm-smmu-v3
---
 drivers/iommu/arm-smmu-v3.c | 2 ++
 drivers/iommu/arm-smmu.c    | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 4ff73ff..bf222b5 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1396,6 +1396,7 @@ static bool arm_smmu_capable(enum iommu_cap cap)
 static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
 {
 	struct arm_smmu_domain *smmu_domain;
+	struct iommu_domain_msi_geometry msi_geometry = {0, 0, true};
 
 	if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA)
 		return NULL;
@@ -1414,6 +1415,7 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
 		kfree(smmu_domain);
 		return NULL;
 	}
+	smmu_domain->domain.msi_geometry = msi_geometry;
 
 	mutex_init(&smmu_domain->init_mutex);
 	spin_lock_init(&smmu_domain->pgtbl_lock);
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 7c39ac4..55f429d 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -976,6 +976,7 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
 static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
 {
 	struct arm_smmu_domain *smmu_domain;
+	struct iommu_domain_msi_geometry msi_geometry = {0, 0, true};
 
 	if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA)
 		return NULL;
@@ -994,6 +995,8 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
 		return NULL;
 	}
 
+	smmu_domain->domain.msi_geometry = msi_geometry;
+
 	mutex_init(&smmu_domain->init_mutex);
 	spin_lock_init(&smmu_domain->pgtbl_lock);
 
-- 
1.9.1

  parent reply	other threads:[~2016-05-04 11:42 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-04 11:39 [PATCH v9 0/8] KVM PCIe/MSI passthrough on ARM/ARM64: kernel part 1/3: iommu changes Eric Auger
2016-05-04 11:40 ` [PATCH v9 1/8] iommu: Add iommu_domain_msi_geometry and DOMAIN_ATTR_MSI_GEOMETRY Eric Auger
2016-05-04 11:40 ` Eric Auger [this message]
2016-05-04 11:40 ` [PATCH v9 3/8] iommu: introduce an msi cookie Eric Auger
2016-05-04 11:40 ` [PATCH v9 4/8] iommu/msi-iommu: initialization Eric Auger
2016-05-09 20:57   ` Alex Williamson
2016-05-10 14:43     ` Eric Auger
2016-05-04 11:40 ` [PATCH v9 5/8] iommu/msi-iommu: iommu_msi_[get,put]_doorbell_iova Eric Auger
2016-05-04 11:40 ` [PATCH v9 6/8] iommu/msi-iommu: iommu_msi_domain Eric Auger
2016-05-04 11:40 ` [PATCH v9 7/8] iommu/msi-iommu: iommu_msi_msg_pa_to_va Eric Auger
2016-05-04 11:40 ` [PATCH v9 8/8] iommu/arm-smmu: get/put the msi cookie Eric Auger

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