linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Robin Murphy <robin.murphy@arm.com>
To: joro@8bytes.org, will.deacon@arm.com, thunder.leizhen@huawei.com,
	iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: linuxarm@huawei.com, guohanjun@huawei.com,
	huawei.libin@huawei.com, john.garry@huawei.com
Subject: [PATCH v7 5/6] iommu/arm-smmu-v3: Add support for non-strict mode
Date: Fri, 14 Sep 2018 15:30:23 +0100	[thread overview]
Message-ID: <4f9444c7224ea0e6e4cef8ddbf77bb5292a383e3.1536935328.git.robin.murphy@arm.com> (raw)
In-Reply-To: <cover.1536935328.git.robin.murphy@arm.com>

From: Zhen Lei <thunder.leizhen@huawei.com>

Dynamically choose strict or non-strict mode for page table config based
on the iommu domain type.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[rm: convert to domain attribute]
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
 drivers/iommu/arm-smmu-v3.c | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index f10c852479fc..7bbfa5f7ce8e 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -612,6 +612,7 @@ struct arm_smmu_domain {
 	struct mutex			init_mutex; /* Protects smmu pointer */
 
 	struct io_pgtable_ops		*pgtbl_ops;
+	bool				non_strict;
 
 	enum arm_smmu_domain_stage	stage;
 	union {
@@ -1633,6 +1634,9 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
 	if (smmu->features & ARM_SMMU_FEAT_COHERENCY)
 		pgtbl_cfg.quirks = IO_PGTABLE_QUIRK_NO_DMA;
 
+	if (smmu_domain->non_strict)
+		pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;
+
 	pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
 	if (!pgtbl_ops)
 		return -ENOMEM;
@@ -1934,13 +1938,17 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
 {
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
 
-	if (domain->type != IOMMU_DOMAIN_UNMANAGED)
-		return -EINVAL;
-
 	switch (attr) {
 	case DOMAIN_ATTR_NESTING:
+		if (domain->type != IOMMU_DOMAIN_UNMANAGED)
+			return -EINVAL;
 		*(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED);
 		return 0;
+	case DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE:
+		if (domain->type != IOMMU_DOMAIN_DMA)
+			return -EINVAL;
+		*(int *)data = smmu_domain->non_strict;
+		return 0;
 	default:
 		return -ENODEV;
 	}
@@ -1952,13 +1960,15 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
 	int ret = 0;
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
 
-	if (domain->type != IOMMU_DOMAIN_UNMANAGED)
-		return -EINVAL;
-
 	mutex_lock(&smmu_domain->init_mutex);
 
 	switch (attr) {
 	case DOMAIN_ATTR_NESTING:
+		if (domain->type != IOMMU_DOMAIN_UNMANAGED) {
+			ret = -EINVAL;
+			goto out_unlock;
+		}
+
 		if (smmu_domain->smmu) {
 			ret = -EPERM;
 			goto out_unlock;
@@ -1969,6 +1979,14 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
 		else
 			smmu_domain->stage = ARM_SMMU_DOMAIN_S1;
 
+		break;
+	case DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE:
+		if (domain->type != IOMMU_DOMAIN_DMA) {
+			ret = -EINVAL;
+			goto out_unlock;
+		}
+
+		smmu_domain->non_strict = *(int *)data;
 		break;
 	default:
 		ret = -ENODEV;
-- 
2.19.0.dirty


  parent reply	other threads:[~2018-09-14 14:30 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-14 14:30 [PATCH v7 0/6] Add non-strict mode support for iommu-dma Robin Murphy
2018-09-14 14:30 ` [PATCH v7 1/6] iommu/arm-smmu-v3: Implement flush_iotlb_all hook Robin Murphy
2018-09-14 14:30 ` [PATCH v7 2/6] iommu/dma: Add support for non-strict mode Robin Murphy
2018-09-18 17:10   ` Will Deacon
2018-09-18 18:52     ` Robin Murphy
2018-09-14 14:30 ` [PATCH v7 3/6] iommu/io-pgtable-arm: " Robin Murphy
2018-09-14 14:30 ` [PATCH v7 4/6] iommu: Add bootup option "iommu.non_strict" Robin Murphy
2018-09-18 17:10   ` Will Deacon
2018-09-18 19:01     ` Robin Murphy
2018-09-14 14:30 ` Robin Murphy [this message]
2018-09-18 17:10   ` [PATCH v7 5/6] iommu/arm-smmu-v3: Add support for non-strict mode Will Deacon
2018-09-18 19:09     ` Robin Murphy
2018-09-14 14:30 ` [PATCH v7 6/6] iommu/arm-smmu: Support " Robin Murphy
2018-09-18 17:10   ` Will Deacon
2018-09-18 19:22     ` Robin Murphy
2018-09-18 17:10 ` [PATCH v7 0/6] Add non-strict mode support for iommu-dma Will Deacon
2018-09-18 18:28   ` Robin Murphy

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=4f9444c7224ea0e6e4cef8ddbf77bb5292a383e3.1536935328.git.robin.murphy@arm.com \
    --to=robin.murphy@arm.com \
    --cc=guohanjun@huawei.com \
    --cc=huawei.libin@huawei.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=john.garry@huawei.com \
    --cc=joro@8bytes.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxarm@huawei.com \
    --cc=thunder.leizhen@huawei.com \
    --cc=will.deacon@arm.com \
    --subject='Re: [PATCH v7 5/6] iommu/arm-smmu-v3: Add support for non-strict mode' \
    /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).