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From: Eric Auger <eric.auger@redhat.com>
To: eric.auger@redhat.com, eric.auger.pro@gmail.com,
	christoffer.dall@linaro.org, marc.zyngier@arm.com,
	robin.murphy@arm.com, alex.williamson@redhat.com,
	will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de,
	jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org, drjones@redhat.com,
	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,
	yehuday@marvell.com, Manish.Jaggi@caviumnetworks.com
Subject: [RFC 03/11] iommu: Introduce IOMMU_DOMAIN_MIXED
Date: Tue, 27 Sep 2016 20:48:30 +0000	[thread overview]
Message-ID: <1475009318-2617-4-git-send-email-eric.auger@redhat.com> (raw)
In-Reply-To: <1475009318-2617-1-git-send-email-eric.auger@redhat.com>

We introduce a new IOMMU domain type, dubbed IOMMU_DOMAIN_MIXED.
It is bound to be used as a replacement of IOMMU_DOMAIN_UNMANAGED
when the IOMMU translates MSI addresses. Such domain hosts
"unmanaged" reserved IOVA ranges chosen by the iommu-api user,
dished out as part of alloc_iova. Rest if available for internal
iova needs such as MSI frame IOVA allocation.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 include/linux/iommu.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 5c2673a..44fe213 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -62,6 +62,9 @@ struct iommu_domain_msi_geometry {
 #define __IOMMU_DOMAIN_DMA_API	(1U << 1)  /* Domain for use in DMA-API
 					      implementation              */
 #define __IOMMU_DOMAIN_PT	(1U << 2)  /* Domain is identity mapped   */
+#define __IOMMU_DOMAIN_MIXED	(1U << 3)  /* Domain mixing unmanaged and
+					    * managed IOVAS
+					    */
 
 /*
  * This are the possible domain-types
@@ -71,6 +74,9 @@ struct iommu_domain_msi_geometry {
  *	IOMMU_DOMAIN_IDENTITY	- DMA addresses are system physical addresses
  *	IOMMU_DOMAIN_UNMANAGED	- DMA mappings managed by IOMMU-API user, used
  *				  for VMs
+ *	IOMMU_DOMAIN_MIXED	- Most DMA mappings are managed by IOMMU-API
+ *				  users and holes are left available for
+				  internal use such as MSI frame IOVA allocation
  *	IOMMU_DOMAIN_DMA	- Internally used for DMA-API implementations.
  *				  This flag allows IOMMU drivers to implement
  *				  certain optimizations for these domains
@@ -80,6 +86,9 @@ struct iommu_domain_msi_geometry {
 #define IOMMU_DOMAIN_UNMANAGED	(__IOMMU_DOMAIN_PAGING)
 #define IOMMU_DOMAIN_DMA	(__IOMMU_DOMAIN_PAGING |	\
 				 __IOMMU_DOMAIN_DMA_API)
+#define IOMMU_DOMAIN_MIXED	(__IOMMU_DOMAIN_MIXED |		\
+				 __IOMMU_DOMAIN_PAGING |	\
+				 __IOMMU_DOMAIN_DMA_API)
 
 struct iommu_domain {
 	unsigned type;
-- 
1.9.1

WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	marc.zyngier-5wv7dgnIgG8@public.gmane.org,
	robin.murphy-5wv7dgnIgG8@public.gmane.org,
	alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	will.deacon-5wv7dgnIgG8@public.gmane.org,
	joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org,
	tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
	jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: drjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Manish.Jaggi-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org,
	p.fedin-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	pranav.sawargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	yehuday-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org
Subject: [RFC 03/11] iommu: Introduce IOMMU_DOMAIN_MIXED
Date: Tue, 27 Sep 2016 20:48:30 +0000	[thread overview]
Message-ID: <1475009318-2617-4-git-send-email-eric.auger@redhat.com> (raw)
In-Reply-To: <1475009318-2617-1-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>

We introduce a new IOMMU domain type, dubbed IOMMU_DOMAIN_MIXED.
It is bound to be used as a replacement of IOMMU_DOMAIN_UNMANAGED
when the IOMMU translates MSI addresses. Such domain hosts
"unmanaged" reserved IOVA ranges chosen by the iommu-api user,
dished out as part of alloc_iova. Rest if available for internal
iova needs such as MSI frame IOVA allocation.

Signed-off-by: Eric Auger <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 include/linux/iommu.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 5c2673a..44fe213 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -62,6 +62,9 @@ struct iommu_domain_msi_geometry {
 #define __IOMMU_DOMAIN_DMA_API	(1U << 1)  /* Domain for use in DMA-API
 					      implementation              */
 #define __IOMMU_DOMAIN_PT	(1U << 2)  /* Domain is identity mapped   */
+#define __IOMMU_DOMAIN_MIXED	(1U << 3)  /* Domain mixing unmanaged and
+					    * managed IOVAS
+					    */
 
 /*
  * This are the possible domain-types
@@ -71,6 +74,9 @@ struct iommu_domain_msi_geometry {
  *	IOMMU_DOMAIN_IDENTITY	- DMA addresses are system physical addresses
  *	IOMMU_DOMAIN_UNMANAGED	- DMA mappings managed by IOMMU-API user, used
  *				  for VMs
+ *	IOMMU_DOMAIN_MIXED	- Most DMA mappings are managed by IOMMU-API
+ *				  users and holes are left available for
+				  internal use such as MSI frame IOVA allocation
  *	IOMMU_DOMAIN_DMA	- Internally used for DMA-API implementations.
  *				  This flag allows IOMMU drivers to implement
  *				  certain optimizations for these domains
@@ -80,6 +86,9 @@ struct iommu_domain_msi_geometry {
 #define IOMMU_DOMAIN_UNMANAGED	(__IOMMU_DOMAIN_PAGING)
 #define IOMMU_DOMAIN_DMA	(__IOMMU_DOMAIN_PAGING |	\
 				 __IOMMU_DOMAIN_DMA_API)
+#define IOMMU_DOMAIN_MIXED	(__IOMMU_DOMAIN_MIXED |		\
+				 __IOMMU_DOMAIN_PAGING |	\
+				 __IOMMU_DOMAIN_DMA_API)
 
 struct iommu_domain {
 	unsigned type;
-- 
1.9.1

  parent reply	other threads:[~2016-09-27 20:49 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-27 20:48 [RFC 00/11] KVM PCIe/MSI passthrough on ARM/ARM64: re-design with transparent MSI mapping Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 01/11] iommu: Add iommu_domain_msi_geometry and DOMAIN_ATTR_MSI_GEOMETRY Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 02/11] iommu: Introduce IOMMU_CAP_TRANSLATE_MSI capability Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` Eric Auger [this message]
2016-09-27 20:48   ` [RFC 03/11] iommu: Introduce IOMMU_DOMAIN_MIXED Eric Auger
2016-09-27 20:48 ` [RFC 04/11] iommu/dma: Allow MSI-only cookies Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 05/11] iommu/dma: iommu_dma_(un)map_mixed Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-30 13:24   ` Robin Murphy
2016-09-30 13:24     ` Robin Murphy
2016-09-30 13:24     ` Robin Murphy
2016-10-02  9:56     ` Christoffer Dall
2016-10-02  9:56       ` Christoffer Dall
2016-10-02  9:56       ` Christoffer Dall
2016-10-04 17:18       ` Robin Murphy
2016-10-04 17:18         ` Robin Murphy
2016-10-04 17:37         ` Auger Eric
2016-10-04 17:37           ` Auger Eric
2016-10-03  9:38     ` Auger Eric
2016-10-03  9:38       ` Auger Eric
2016-10-03  9:38       ` Auger Eric
2016-09-27 20:48 ` [RFC 06/11] iommu/arm-smmu: Allow IOMMU_DOMAIN_MIXED domain allocation Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 07/11] iommu: Use IOMMU_DOMAIN_MIXED typed domain when IOMMU translates MSI Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 08/11] vfio/type1: Sets the IOVA window in case MSI IOVA need to be allocated Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 09/11] vfio/type1: Reserve IOVAs for IOMMU_DOMAIN_MIXED domains Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 10/11] iommu/arm-smmu: Do not advertise IOMMU_CAP_INTR_REMAP Eric Auger
2016-09-27 20:48   ` Eric Auger
2016-09-27 20:48 ` [RFC 11/11] iommu/arm-smmu: Advertise IOMMU_CAP_TRANSLATE_MSI Eric Auger
2016-09-27 20:48   ` Eric Auger

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