From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [PATCH v10 2/8] iommu/arm-smmu: initialize the msi geometry and advertise iommu-msi support Date: Tue, 7 Jun 2016 15:59:16 +0000 Message-ID: <1465315162-5888-3-git-send-email-eric.auger@redhat.com> References: <1465315162-5888-1-git-send-email-eric.auger@redhat.com> Return-path: In-Reply-To: <1465315162-5888-1-git-send-email-eric.auger@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: eric.auger@redhat.com, eric.auger.pro@gmail.com, 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: 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 List-Id: iommu@lists.linux-foundation.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 --- 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 94b6821..8eb002e 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1397,6 +1397,7 @@ 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; @@ -1415,6 +1416,7 @@ 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 9345a3f..9755a1b 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1038,6 +1038,7 @@ 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; @@ -1056,6 +1057,8 @@ 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