LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Jordan Crouse <jcrouse@codeaurora.org>
To: freedreno@lists.freedesktop.org
Cc: jean-philippe.brucker@arm.com, linux-arm-msm@vger.kernel.org,
	hoegsberg@google.com, dianders@chromium.org,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	Robin Murphy <robin.murphy@arm.com>,
	Will Deacon <will.deacon@arm.com>, Joerg Roedel <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 01/16] iommu/arm-smmu: Allow client devices to select direct mapping
Date: Wed, 29 May 2019 14:54:37 -0600	[thread overview]
Message-ID: <1559163292-4792-2-git-send-email-jcrouse@codeaurora.org> (raw)
In-Reply-To: <1559163292-4792-1-git-send-email-jcrouse@codeaurora.org>

Some client devices want to directly map the IOMMU themselves instead
of using the DMA domain. Allow those devices to opt in to direct
mapping by way of a list of compatible strings.

v3: use iommu_request_dm_for_dev() to set up a default identity domain
for a group, per Robin

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---

 drivers/iommu/arm-smmu.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 5e54cc0..7537639 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1235,6 +1235,35 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain,
 	return 0;
 }
 
+struct arm_smmu_client_match_data {
+	bool direct_mapping;
+};
+
+static const struct arm_smmu_client_match_data qcom_adreno = {
+	.direct_mapping = true,
+};
+
+static const struct arm_smmu_client_match_data qcom_mdss = {
+	.direct_mapping = true,
+};
+
+static const struct of_device_id arm_smmu_client_of_match[] = {
+	{ .compatible = "qcom,adreno", .data = &qcom_adreno },
+	{ .compatible = "qcom,mdp4", .data = &qcom_mdss },
+	{ .compatible = "qcom,mdss", .data = &qcom_mdss },
+	{ .compatible = "qcom,sdm845-mdss", .data = &qcom_mdss },
+	{},
+};
+
+static const struct arm_smmu_client_match_data *
+arm_smmu_client_data(struct device *dev)
+{
+	const struct of_device_id *match =
+		of_match_device(arm_smmu_client_of_match, dev);
+
+	return match ? match->data : NULL;
+}
+
 static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
 {
 	int ret;
@@ -1450,6 +1479,7 @@ static int arm_smmu_add_device(struct device *dev)
 	struct arm_smmu_device *smmu;
 	struct arm_smmu_master_cfg *cfg;
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+	const struct arm_smmu_client_match_data *client;
 	int i, ret;
 
 	if (using_legacy_binding) {
@@ -1512,6 +1542,11 @@ static int arm_smmu_add_device(struct device *dev)
 	device_link_add(dev, smmu->dev,
 			DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER);
 
+	client = arm_smmu_client_data(dev);
+
+	if (client && client->direct_mapping)
+		iommu_request_dm_for_dev(dev);
+
 	return 0;
 
 out_cfg_free:
-- 
2.7.4


  reply	other threads:[~2019-05-29 20:55 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-29 20:54 [PATCH v3 00/16] drm/msm: Per-instance pagetable support Jordan Crouse
2019-05-29 20:54 ` Jordan Crouse [this message]
2019-05-29 20:54 ` [PATCH v3 02/16] iommu: Add DOMAIN_ATTR_SPLIT_TABLES Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 03/16] iommu/io-pgtable-arm: Add support for AARCH64 split pagetables Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 04/16] iommu/arm-smmu: Add support for DOMAIN_ATTR_SPLIT_TABLES Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 05/16] iommu: Add DOMAIN_ATTR_PTBASE Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 06/16] iommu/arm-smmu: Add auxiliary domain support for arm-smmuv2 Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 07/16] drm/msm/adreno: Enable 64 bit mode by default on a5xx and a6xx targets Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 08/16] drm/msm: Print all 64 bits of the faulting IOMMU address Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 09/16] drm/msm: Pass the MMU domain index in struct msm_file_private Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 10/16] drm/msm/gpu: Move address space setup to the GPU targets Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 11/16] drm/msm: Add support for IOMMU auxiliary domains Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 12/16] drm/msm: Add a helper function for a per-instance address space Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 13/16] drm/msm: Add support to create target specific address spaces Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 14/16] drm/msm/gpu: Add ttbr0 to the memptrs Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 15/16] drm/msm/a6xx: Support per-instance pagetables Jordan Crouse
2019-05-29 20:54 ` [PATCH v3 16/16] drm/msm/a5xx: " Jordan Crouse

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1559163292-4792-2-git-send-email-jcrouse@codeaurora.org \
    --to=jcrouse@codeaurora.org \
    --cc=dianders@chromium.org \
    --cc=freedreno@lists.freedesktop.org \
    --cc=hoegsberg@google.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=jean-philippe.brucker@arm.com \
    --cc=joro@8bytes.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=robin.murphy@arm.com \
    --cc=will.deacon@arm.com \
    --subject='Re: [PATCH v3 01/16] iommu/arm-smmu: Allow client devices to select direct mapping' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).