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Thu, 11 Jun 2020 22:29:32 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 43DCDC433A0; Thu, 11 Jun 2020 22:29:31 +0000 (UTC) Received: from jordan-laptop.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jcrouse) by smtp.codeaurora.org (Postfix) with ESMTPSA id E5C87C433B1; Thu, 11 Jun 2020 22:29:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E5C87C433B1 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=jcrouse@codeaurora.org From: Jordan Crouse To: linux-arm-msm@vger.kernel.org Subject: [PATCH 3/6] iommu/arm-smmu: Add a domain attribute to pass the pagetable config Date: Thu, 11 Jun 2020 16:29:18 -0600 Message-Id: <20200611222921.464-4-jcrouse@codeaurora.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200611222921.464-1-jcrouse@codeaurora.org> References: <20200611222921.464-1-jcrouse@codeaurora.org> Cc: Will Deacon , freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" The Adreno GPU has the capacity to manage its own pagetables and switch them dynamically from the hardware. Add a domain attribute for arm-smmu-v2 to get the default pagetable configuration so that the GPU driver can match the format for its own pagetables. Signed-off-by: Jordan Crouse --- drivers/iommu/arm-smmu.c | 12 ++++++++++++ include/linux/iommu.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 46a96c578592..a06cbcaec247 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1710,6 +1710,18 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, case DOMAIN_ATTR_NESTING: *(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED); return 0; + case DOMAIN_ATTR_PGTABLE_CFG: { + struct io_pgtable *pgtable; + struct io_pgtable_cfg *dest = data; + + if (!smmu_domain->pgtbl_ops) + return -ENODEV; + + pgtable = io_pgtable_ops_to_pgtable(smmu_domain->pgtbl_ops); + + memcpy(dest, &pgtable->cfg, sizeof(*dest)); + return 0; + } default: return -ENODEV; } diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 5f0b7859d2eb..2388117641f1 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -124,6 +124,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, + DOMAIN_ATTR_PGTABLE_CFG, DOMAIN_ATTR_MAX, }; -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu