RE: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
> -Original Message- > From: Joerg Roedel [mailto:j...@8bytes.org] > Sent: Wednesday, April 24, 2013 4:21 PM > To: Sethi Varun-B16395 > Cc: io...@lists.linux-foundation.org; linuxppc-...@lists.ozlabs.org; > linux-kernel@vger.kernel.org; ga...@kernel.crashing.org; > b...@kernel.crashing.org; Yoder Stuart-B08248; Wood Scott-B07421 > Subject: Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes > required by the PAMU driver. > > On Tue, Apr 23, 2013 at 02:10:25PM +, Sethi Varun-B16395 wrote: > > I think it's fine to have the header under linux, actually I also the > > intel-iommu header under linux. > > Yes, the difference is that VT-d runs on x86 and on ia64. So there is no > single arch where the header could be placed. The amd-iommu.h file on the > other hand is x86 only and should also be moved to asm/, as I just found > out :) > > And as long as PAMU is only needed on a single architecture the header > should also be arch-specific. If that changes someday the header can be > moved to a generic place. > Ok, I will post the next version of the patch set. -Varun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
On Tue, Apr 23, 2013 at 02:10:25PM +, Sethi Varun-B16395 wrote: > I think it's fine to have the header under linux, actually I also the > intel-iommu header under linux. Yes, the difference is that VT-d runs on x86 and on ia64. So there is no single arch where the header could be placed. The amd-iommu.h file on the other hand is x86 only and should also be moved to asm/, as I just found out :) And as long as PAMU is only needed on a single architecture the header should also be arch-specific. If that changes someday the header can be moved to a generic place. Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
On Tue, Apr 23, 2013 at 02:10:25PM +, Sethi Varun-B16395 wrote: I think it's fine to have the header under linux, actually I also the intel-iommu header under linux. Yes, the difference is that VT-d runs on x86 and on ia64. So there is no single arch where the header could be placed. The amd-iommu.h file on the other hand is x86 only and should also be moved to asm/, as I just found out :) And as long as PAMU is only needed on a single architecture the header should also be arch-specific. If that changes someday the header can be moved to a generic place. Joerg -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
-Original Message- From: Joerg Roedel [mailto:j...@8bytes.org] Sent: Wednesday, April 24, 2013 4:21 PM To: Sethi Varun-B16395 Cc: io...@lists.linux-foundation.org; linuxppc-...@lists.ozlabs.org; linux-kernel@vger.kernel.org; ga...@kernel.crashing.org; b...@kernel.crashing.org; Yoder Stuart-B08248; Wood Scott-B07421 Subject: Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver. On Tue, Apr 23, 2013 at 02:10:25PM +, Sethi Varun-B16395 wrote: I think it's fine to have the header under linux, actually I also the intel-iommu header under linux. Yes, the difference is that VT-d runs on x86 and on ia64. So there is no single arch where the header could be placed. The amd-iommu.h file on the other hand is x86 only and should also be moved to asm/, as I just found out :) And as long as PAMU is only needed on a single architecture the header should also be arch-specific. If that changes someday the header can be moved to a generic place. Ok, I will post the next version of the patch set. -Varun -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
> -Original Message- > From: Joerg Roedel [mailto:j...@8bytes.org] > Sent: Tuesday, April 23, 2013 8:39 AM > To: Sethi Varun-B16395 > Cc: io...@lists.linux-foundation.org; linuxppc-...@lists.ozlabs.org; > linux-kernel@vger.kernel.org; > ga...@kernel.crashing.org; b...@kernel.crashing.org; Yoder Stuart-B08248; > Wood Scott-B07421 > Subject: Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes > required by the PAMU driver. > > On Tue, Apr 23, 2013 at 10:05:25AM +0530, Varun Sethi wrote: > > Added the following domain attributes for the FSL PAMU driver: > > 1. Added new iommu stash attribute, which allows setting of the > >LIODN specific stash id parameter through IOMMU API. > > 2. Added an attribute for enabling/disabling DMA to a particular > >memory window. > > 3. Added domain attribute to check for PAMUV1 specific constraints. > > > > Signed-off-by: Varun Sethi > > --- > > v14 changes: > > - Add FSL prefix to PAMU attributes. > > v13 changes: > > - created a new file include/linux/fsl_pamu_stash.h for stash > > attributes. > > v12 changes: > > - Moved PAMU specifc stash ids and structures to PAMU header file. > > - no change in v11. > > - no change in v10. > > include/linux/fsl_pamu_stash.h | 39 > > +++ > > Isn't asm/ for your architecture a better place for that header? The PAMU isn't strictly tied to Power architecture, although that is where it is implemented now. It could be implemented on ARM for example. Stuart -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
> -Original Message- > From: Joerg Roedel [mailto:j...@8bytes.org] > Sent: Tuesday, April 23, 2013 7:09 PM > To: Sethi Varun-B16395 > Cc: io...@lists.linux-foundation.org; linuxppc-...@lists.ozlabs.org; > linux-kernel@vger.kernel.org; ga...@kernel.crashing.org; > b...@kernel.crashing.org; Yoder Stuart-B08248; Wood Scott-B07421 > Subject: Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes > required by the PAMU driver. > > On Tue, Apr 23, 2013 at 10:05:25AM +0530, Varun Sethi wrote: > > Added the following domain attributes for the FSL PAMU driver: > > 1. Added new iommu stash attribute, which allows setting of the > >LIODN specific stash id parameter through IOMMU API. > > 2. Added an attribute for enabling/disabling DMA to a particular > >memory window. > > 3. Added domain attribute to check for PAMUV1 specific constraints. > > > > Signed-off-by: Varun Sethi > > --- > > v14 changes: > > - Add FSL prefix to PAMU attributes. > > v13 changes: > > - created a new file include/linux/fsl_pamu_stash.h for stash > > attributes. > > v12 changes: > > - Moved PAMU specifc stash ids and structures to PAMU header file. > > - no change in v11. > > - no change in v10. > > include/linux/fsl_pamu_stash.h | 39 > +++ > > Isn't asm/ for your architecture a better place for that header? > I think it's fine to have the header under linux, actually I also the intel-iommu header under linux. -Varun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
On Tue, Apr 23, 2013 at 10:05:25AM +0530, Varun Sethi wrote: > Added the following domain attributes for the FSL PAMU driver: > 1. Added new iommu stash attribute, which allows setting of the >LIODN specific stash id parameter through IOMMU API. > 2. Added an attribute for enabling/disabling DMA to a particular >memory window. > 3. Added domain attribute to check for PAMUV1 specific constraints. > > Signed-off-by: Varun Sethi > --- > v14 changes: > - Add FSL prefix to PAMU attributes. > v13 changes: > - created a new file include/linux/fsl_pamu_stash.h for stash > attributes. > v12 changes: > - Moved PAMU specifc stash ids and structures to PAMU header file. > - no change in v11. > - no change in v10. > include/linux/fsl_pamu_stash.h | 39 +++ Isn't asm/ for your architecture a better place for that header? Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
On Tue, Apr 23, 2013 at 10:05:25AM +0530, Varun Sethi wrote: Added the following domain attributes for the FSL PAMU driver: 1. Added new iommu stash attribute, which allows setting of the LIODN specific stash id parameter through IOMMU API. 2. Added an attribute for enabling/disabling DMA to a particular memory window. 3. Added domain attribute to check for PAMUV1 specific constraints. Signed-off-by: Varun Sethi varun.se...@freescale.com --- v14 changes: - Add FSL prefix to PAMU attributes. v13 changes: - created a new file include/linux/fsl_pamu_stash.h for stash attributes. v12 changes: - Moved PAMU specifc stash ids and structures to PAMU header file. - no change in v11. - no change in v10. include/linux/fsl_pamu_stash.h | 39 +++ Isn't asm/ for your architecture a better place for that header? Joerg -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
-Original Message- From: Joerg Roedel [mailto:j...@8bytes.org] Sent: Tuesday, April 23, 2013 7:09 PM To: Sethi Varun-B16395 Cc: io...@lists.linux-foundation.org; linuxppc-...@lists.ozlabs.org; linux-kernel@vger.kernel.org; ga...@kernel.crashing.org; b...@kernel.crashing.org; Yoder Stuart-B08248; Wood Scott-B07421 Subject: Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver. On Tue, Apr 23, 2013 at 10:05:25AM +0530, Varun Sethi wrote: Added the following domain attributes for the FSL PAMU driver: 1. Added new iommu stash attribute, which allows setting of the LIODN specific stash id parameter through IOMMU API. 2. Added an attribute for enabling/disabling DMA to a particular memory window. 3. Added domain attribute to check for PAMUV1 specific constraints. Signed-off-by: Varun Sethi varun.se...@freescale.com --- v14 changes: - Add FSL prefix to PAMU attributes. v13 changes: - created a new file include/linux/fsl_pamu_stash.h for stash attributes. v12 changes: - Moved PAMU specifc stash ids and structures to PAMU header file. - no change in v11. - no change in v10. include/linux/fsl_pamu_stash.h | 39 +++ Isn't asm/ for your architecture a better place for that header? I think it's fine to have the header under linux, actually I also the intel-iommu header under linux. -Varun -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
-Original Message- From: Joerg Roedel [mailto:j...@8bytes.org] Sent: Tuesday, April 23, 2013 8:39 AM To: Sethi Varun-B16395 Cc: io...@lists.linux-foundation.org; linuxppc-...@lists.ozlabs.org; linux-kernel@vger.kernel.org; ga...@kernel.crashing.org; b...@kernel.crashing.org; Yoder Stuart-B08248; Wood Scott-B07421 Subject: Re: [PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver. On Tue, Apr 23, 2013 at 10:05:25AM +0530, Varun Sethi wrote: Added the following domain attributes for the FSL PAMU driver: 1. Added new iommu stash attribute, which allows setting of the LIODN specific stash id parameter through IOMMU API. 2. Added an attribute for enabling/disabling DMA to a particular memory window. 3. Added domain attribute to check for PAMUV1 specific constraints. Signed-off-by: Varun Sethi varun.se...@freescale.com --- v14 changes: - Add FSL prefix to PAMU attributes. v13 changes: - created a new file include/linux/fsl_pamu_stash.h for stash attributes. v12 changes: - Moved PAMU specifc stash ids and structures to PAMU header file. - no change in v11. - no change in v10. include/linux/fsl_pamu_stash.h | 39 +++ Isn't asm/ for your architecture a better place for that header? The PAMU isn't strictly tied to Power architecture, although that is where it is implemented now. It could be implemented on ARM for example. Stuart -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
Added the following domain attributes for the FSL PAMU driver:
1. Added new iommu stash attribute, which allows setting of the
LIODN specific stash id parameter through IOMMU API.
2. Added an attribute for enabling/disabling DMA to a particular
memory window.
3. Added domain attribute to check for PAMUV1 specific constraints.
Signed-off-by: Varun Sethi
---
v14 changes:
- Add FSL prefix to PAMU attributes.
v13 changes:
- created a new file include/linux/fsl_pamu_stash.h for stash
attributes.
v12 changes:
- Moved PAMU specifc stash ids and structures to PAMU header file.
- no change in v11.
- no change in v10.
include/linux/fsl_pamu_stash.h | 39 +++
include/linux/iommu.h | 16
2 files changed, 55 insertions(+), 0 deletions(-)
create mode 100644 include/linux/fsl_pamu_stash.h
diff --git a/include/linux/fsl_pamu_stash.h b/include/linux/fsl_pamu_stash.h
new file mode 100644
index 000..caa1b21
--- /dev/null
+++ b/include/linux/fsl_pamu_stash.h
@@ -0,0 +1,39 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ */
+
+#ifndef __FSL_PAMU_STASH_H
+#define __FSL_PAMU_STASH_H
+
+/* cache stash targets */
+enum pamu_stash_target {
+ PAMU_ATTR_CACHE_L1 = 1,
+ PAMU_ATTR_CACHE_L2,
+ PAMU_ATTR_CACHE_L3,
+};
+
+/*
+ * This attribute allows configuring stashig specific parameters
+ * in the PAMU hardware.
+ */
+
+struct pamu_stash_attribute {
+ u32 cpu;/* cpu number */
+ u32 cache; /* cache to stash to: L1,L2,L3 */
+};
+
+#endif /* __FSL_PAMU_STASH_H */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 2727810..c5dc2b9 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -57,10 +57,26 @@ struct iommu_domain {
#define IOMMU_CAP_CACHE_COHERENCY 0x1
#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
+/*
+ * Following constraints are specifc to FSL_PAMUV1:
+ * -aperture must be power of 2, and naturally aligned
+ * -number of windows must be power of 2, and address space size
+ * of each window is determined by aperture size / # of windows
+ * -the actual size of the mapped region of a window must be power
+ * of 2 starting with 4KB and physical address must be naturally
+ * aligned.
+ * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
+ * The caller can invoke iommu_domain_get_attr to check if the underlying
+ * iommu implementation supports these constraints.
+ */
+
enum iommu_attr {
DOMAIN_ATTR_GEOMETRY,
DOMAIN_ATTR_PAGING,
DOMAIN_ATTR_WINDOWS,
+ DOMAIN_ATTR_FSL_PAMU_STASH,
+ DOMAIN_ATTR_FSL_PAMU_ENABLE,
+ DOMAIN_ATTR_FSL_PAMUV1,
DOMAIN_ATTR_MAX,
};
--
1.7.4.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[PATCH 2/3 v14] iommu/fsl: Add additional iommu attributes required by the PAMU driver.
Added the following domain attributes for the FSL PAMU driver:
1. Added new iommu stash attribute, which allows setting of the
LIODN specific stash id parameter through IOMMU API.
2. Added an attribute for enabling/disabling DMA to a particular
memory window.
3. Added domain attribute to check for PAMUV1 specific constraints.
Signed-off-by: Varun Sethi varun.se...@freescale.com
---
v14 changes:
- Add FSL prefix to PAMU attributes.
v13 changes:
- created a new file include/linux/fsl_pamu_stash.h for stash
attributes.
v12 changes:
- Moved PAMU specifc stash ids and structures to PAMU header file.
- no change in v11.
- no change in v10.
include/linux/fsl_pamu_stash.h | 39 +++
include/linux/iommu.h | 16
2 files changed, 55 insertions(+), 0 deletions(-)
create mode 100644 include/linux/fsl_pamu_stash.h
diff --git a/include/linux/fsl_pamu_stash.h b/include/linux/fsl_pamu_stash.h
new file mode 100644
index 000..caa1b21
--- /dev/null
+++ b/include/linux/fsl_pamu_stash.h
@@ -0,0 +1,39 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ */
+
+#ifndef __FSL_PAMU_STASH_H
+#define __FSL_PAMU_STASH_H
+
+/* cache stash targets */
+enum pamu_stash_target {
+ PAMU_ATTR_CACHE_L1 = 1,
+ PAMU_ATTR_CACHE_L2,
+ PAMU_ATTR_CACHE_L3,
+};
+
+/*
+ * This attribute allows configuring stashig specific parameters
+ * in the PAMU hardware.
+ */
+
+struct pamu_stash_attribute {
+ u32 cpu;/* cpu number */
+ u32 cache; /* cache to stash to: L1,L2,L3 */
+};
+
+#endif /* __FSL_PAMU_STASH_H */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 2727810..c5dc2b9 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -57,10 +57,26 @@ struct iommu_domain {
#define IOMMU_CAP_CACHE_COHERENCY 0x1
#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
+/*
+ * Following constraints are specifc to FSL_PAMUV1:
+ * -aperture must be power of 2, and naturally aligned
+ * -number of windows must be power of 2, and address space size
+ * of each window is determined by aperture size / # of windows
+ * -the actual size of the mapped region of a window must be power
+ * of 2 starting with 4KB and physical address must be naturally
+ * aligned.
+ * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
+ * The caller can invoke iommu_domain_get_attr to check if the underlying
+ * iommu implementation supports these constraints.
+ */
+
enum iommu_attr {
DOMAIN_ATTR_GEOMETRY,
DOMAIN_ATTR_PAGING,
DOMAIN_ATTR_WINDOWS,
+ DOMAIN_ATTR_FSL_PAMU_STASH,
+ DOMAIN_ATTR_FSL_PAMU_ENABLE,
+ DOMAIN_ATTR_FSL_PAMUV1,
DOMAIN_ATTR_MAX,
};
--
1.7.4.1
--
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