On Fri, 16 May 2014 14:23:18 +0200, Thierry Reding wrote:
> From: Thierry Reding
>
> This commit introduces a generic device tree binding for IOMMU devices.
> Only a very minimal subset is described here, but it is enough to cover
> the requirements of both the Exynos System MMU and Tegra SMMU as
On Thu, 15 May 2014 22:37:31 +0200, Thierry Reding wrote:
> On Mon, Apr 28, 2014 at 02:05:30PM +0200, Arnd Bergmann wrote:
> [...]
> > let me clarify by example:
> >
> > iommu@1 {
> > compatible = "some,simple-iommu";
> > reg = <1>;
> > #iommu-cells = <0>; /
On Tue, 06 May 2014 20:05:14 +0200, Tomasz Figa wrote:
> On 27.04.2014 09:37, Shaik Ameer Basha wrote:
> > From: Cho KyongHo
> >
> > Some master device descriptor like fimc-is which is an abstraction
> > of very complex H/W may have multiple System MMUs. For those dev
On Tue, 06 May 2014 20:08:47 +0200, Tomasz Figa wrote:
> On 06.05.2014 19:59, Joerg Roedel wrote:
> > On Wed, Apr 30, 2014 at 04:27:10PM +0530, Shaik Ameer Basha wrote:
> >> This series is going on for quite a long time and most of the patches here
> >> doesn't depend on dt bindings. As Exynos IOMM
On Mon, 28 Apr 2014 16:13:19 -0700, Doug Anderson wrote:
> Vikas,
>
>
> On Sun, Apr 27, 2014 at 10:39 AM, Vikas Sajjan wrote:
> > Hi shaik,
> >
> > +Doug, Abhilash,
> >
> > On Sun, Apr 27, 2014 at 1:08 PM, Shaik Ameer Basha
> > wrote:
>
On Mon, 28 Apr 2014 16:08:14 +0530, Tushar Behera wrote:
> On 04/27/2014 01:07 PM, Shaik Ameer Basha wrote:
> > From: Cho KyongHo
> >
> > Some master device descriptor like fimc-is which is an abstraction
> > of very complex H/W may have multiple System MMUs. For those
On Sun, 27 Apr 2014 20:17:48 +0200, Arnd Bergmann wrote:
> On Sunday 27 April 2014 13:07:47 Shaik Ameer Basha wrote:
> > @@ -542,14 +592,41 @@ static int __init exynos_sysmmu_probe(struct
> > platform_device *pdev)
> > }
> > }
> >
> > + /* Relation between master and System MMU
On Tue, 22 Apr 2014 18:53:51 +0530, Shaik Ameer Basha wrote:
> Hi KyongHo Cho,
>
>
>
> On Fri, Mar 14, 2014 at 10:40 AM, Cho KyongHo wrote:
> > Some master device descriptor like fimc-is which is an abstraction
> > of very complex H/W may have multiple System MMUs.
On Sun, 20 Apr 2014 15:25:59 +0530, Shaik Ameer Basha wrote:
> Hi KyongHo Cho,
>
> Please find the comments inline.
>
> On Fri, Mar 14, 2014 at 10:36 AM, Cho KyongHo wrote:
> > This patch adds dts entries for the System MMU devices found on
> > Exynos4 and Exynos5 So
On Thu, 20 Mar 2014 11:54:58 +0100, Tomasz Figa wrote:
> On 20.03.2014 11:22, Cho KyongHo wrote:
> > On Wed, 19 Mar 2014 16:14:57 +0100, Tomasz Figa wrote:
> >> On 19.03.2014 14:20, Tomasz Figa wrote:
> >>> On 19.03.2014 01:39, Cho KyongHo wrote:
> >>>&g
On Thu, 20 Mar 2014 11:44:50 +0100, Tomasz Figa wrote:
> On 20.03.2014 11:03, Cho KyongHo wrote:
> > On Wed, 19 Mar 2014 13:08:42 +0100, Tomasz Figa wrote:
> >> On 19.03.2014 10:01, Sachin Kamat wrote:
> >>> On 19 March 2014 14:29, Cho KyongHo wrote:
> >&g
On Wed, 19 Mar 2014 19:51:21 +0100, Tomasz Figa wrote:
> On 19.03.2014 19:37, Grant Grundler wrote:
> > On Wed, Mar 19, 2014 at 10:30 AM, Tomasz Figa wrote:
> > ...
> >> As I said, AFAIK the trend is to get rid of ordering by initcalls and make
> >> sure that drivers can handle missing dependencie
On Wed, 19 Mar 2014 09:54:39 -0700, Grant Grundler wrote:
> On Wed, Mar 19, 2014 at 6:12 AM, Tomasz Figa wrote:
> ...
> >> Device driver is not only for the scholarship but also for the real use.
> >
> > Huh? I'm not sure what kind of comment is this.
>
> I'm guessing Cho meant: "This isn't an ac
On Wed, 19 Mar 2014 16:14:57 +0100, Tomasz Figa wrote:
> On 19.03.2014 14:20, Tomasz Figa wrote:
> > On 19.03.2014 01:39, Cho KyongHo wrote:
> >> On Tue, 18 Mar 2014 15:26:48 +0100, Tomasz Figa wrote:
> >>>
> >>>
> >>> On 18.03.2014 14:01,
On Wed, 19 Mar 2014 13:08:42 +0100, Tomasz Figa wrote:
> On 19.03.2014 10:01, Sachin Kamat wrote:
> > On 19 March 2014 14:29, Cho KyongHo wrote:
> >> On Tue, 18 Mar 2014 16:14:53 +0100, Tomasz Figa wrote:
> >>> On 18.03.2014 12:09, Cho KyongHo wrote:
> >&g
On Tue, 18 Mar 2014 18:33:20 -0700, Grant Grundler wrote:
> On Thu, Mar 13, 2014 at 10:13 PM, Cho KyongHo wrote:
> > This commit introduces sysmmu_pte_t for page table entries and
> > sysmmu_iova_t vor I/O virtual address that is manipulated by
> > exynos-iommu driver. The p
On Tue, 18 Mar 2014 16:33:04 +0100, Tomasz Figa wrote:
> On 18.03.2014 12:23, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 17:07:53 +0100, Tomasz Figa wrote:
> >> Hi KyongHo,
> >>
> >> On 14.03.2014 06:10, Cho KyongHo wrote:
>
> [snip]
>
On Tue, 18 Mar 2014 16:25:11 +0100, Tomasz Figa wrote:
> On 18.03.2014 11:52, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 14:39:33 +0100, Tomasz Figa wrote:
> >>> @@ -557,11 +558,23 @@ static int exynos_sysmmu_probe(struct
> >>> platform_devic
On Tue, 18 Mar 2014 16:14:53 +0100, Tomasz Figa wrote:
> On 18.03.2014 12:09, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 20:52:43 +0530, Sachin Kamat wrote:
> >> Hi KyongHo,
> >>
> >> On 14 March 2014 10:35, Cho KyongHo wrote:
> >>> This patch u
On Wed, 19 Mar 2014 08:59:09 +0900, Jingoo Han wrote:
> On Wednesday, March 19, 2014 12:12 AM, Tomasz Figa wrote:
> > On 18.03.2014 11:38, Cho KyongHo wrote:
> > > On Fri, 14 Mar 2014 14:28:36 +0100, Tomasz Figa wrote:
> > >> On 14.03.2014 06:05, Cho KyongHo wrote:
&
On Tue, 18 Mar 2014 16:46:24 +0530, Sachin Kamat wrote:
> On 18 March 2014 16:44, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 20:57:42 +0530, Sachin Kamat wrote:
> >> Hi KyongHo,
> >>
> >> On 14 March 2014 10:39, Cho KyongHo wrote:
> >> >
> >&
On Tue, 18 Mar 2014 16:09:50 +0100, Tomasz Figa wrote:
> On 18.03.2014 10:56, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 13:59:00 +0100, Tomasz Figa wrote:
> >> Hi KyongHo,
> >>
> >> On 14.03.2014 06:08, Cho KyongHo wrote:
>
> [snip]
>
>
On Tue, 18 Mar 2014 15:26:48 +0100, Tomasz Figa wrote:
>
>
> On 18.03.2014 14:01, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 17:12:03 +0100, Tomasz Figa wrote:
> >> Hi KyongHo,
> >>
> >> On 14.03.2014 06:10, Cho KyongHo wrote:
> >>>
On Fri, 14 Mar 2014 17:12:03 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:10, Cho KyongHo wrote:
> > Some master device descriptor like fimc-is which is an abstraction
> > of very complex H/W may have multiple System MMUs. For those devices,
> > the
On Fri, 14 Mar 2014 17:07:53 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:10, Cho KyongHo wrote:
> > This adds support for Suspend to RAM and Runtime Power Management.
> >
> > Since System MMU is located in the same local power domain of its
> &g
On Fri, 14 Mar 2014 20:57:42 +0530, Sachin Kamat wrote:
> Hi KyongHo,
>
> On 14 March 2014 10:39, Cho KyongHo wrote:
> > This commit adds device tree support for System MMU.
> >
> > Signed-off-by: Cho KyongHo
> > ---
> > drivers/iommu/Kconfig
On Fri, 14 Mar 2014 20:52:43 +0530, Sachin Kamat wrote:
> Hi KyongHo,
>
> On 14 March 2014 10:35, Cho KyongHo wrote:
> > This patch uses managed device helper functions in the probe().
> >
> > Signed-off-by: Cho KyongHo
> > ---
> [snip]
>
> >
On Fri, 14 Mar 2014 22:27:59 +0530, Sachin Kamat wrote:
> Hi KyongHo,
>
> On 14 March 2014 19:13, Tomasz Figa wrote:
> > Hi KyongHo,
> >
> >
> > On 14.03.2014 06:09, Cho KyongHo wrote:
> >>
> >> exynos-iommu driver must care about master H/W&#
On Fri, 14 Mar 2014 14:39:33 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:09, Cho KyongHo wrote:
> > This commit adds device tree support for System MMU.
> >
> > Signed-off-by: Cho KyongHo
> > ---
> > drivers/iommu/Kconfig|5 +
On Fri, 14 Mar 2014 14:28:36 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:05, Cho KyongHo wrote:
> > This patch uses managed device helper functions in the probe().
> >
> > Signed-off-by: Cho KyongHo
> > ---
> >
On Fri, 14 Mar 2014 14:07:32 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:05, Cho KyongHo wrote:
> > System MMU driver is changed to control only a single instance of
> > System MMU at a time. Since a single instance of System MMU has only
> > a sing
On Fri, 14 Mar 2014 13:59:00 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:08, Cho KyongHo wrote:
> > Runtime power management by exynos-iommu driver independently from
> > master H/W's runtime pm is not useful for power saving since attaching
> >
On Fri, 14 Mar 2014 13:20:23 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:06, Cho KyongHo wrote:
> > This patch adds dts entries for the System MMU devices found on
> > Exynos4 and Exynos5 SoC series and the System MMU binding
> > documentation.
>
On Fri, 14 Mar 2014 13:17:26 +0100, Tomasz Figa wrote:
> Hi KyongHo,
>
> On 14.03.2014 06:06, Cho KyongHo wrote:
> > This adds gate clocks of all System MMUs and their master IPs
> > that are not apeared in clk-exynos5250.c and clk-exynos5420.c
> > Also fixes GATE_IP
On Fri, 14 Mar 2014 17:29:36 +0530, Sachin Kamat wrote:
> On 14 March 2014 17:19, Cho KyongHo wrote:
> >> From: Sachin Kamat [mailto:sachin.ka...@linaro.org]
> >> Sent: Friday, March 14, 2014 7:00 PM
> >>
> >> On 14 March 2014 10:31, Cho KyongHo wrote
> From: Sachin Kamat [mailto:sachin.ka...@linaro.org]
> Sent: Friday, March 14, 2014 7:00 PM
>
> On 14 March 2014 10:31, Cho KyongHo wrote:
> > Commit 25e9d28d92 (ARM: EXYNOS: remove system mmu initialization from
> > exynos tree) removed arch/arm/mach-exynos/mach
Some redundant error message is removed and some error messages
are changed to error level from debug level.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 23 +--
1 file changed, 9 insertions(+), 14 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b
2 page table entries.
This is the size between 256K ~ 384K.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 164 +-
1 file changed, 147 insertions(+), 17 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
This commit changes the function to get MMU version simpler.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 30 ++
1 file changed, 6 insertions(+), 24 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index
This commit introduces sysmmu_pte_t for page table entries and
sysmmu_iova_t vor I/O virtual address that is manipulated by
exynos-iommu driver. The purpose of the typedef is to remove
dependencies to the driver code from the change of CPU architecture
from 32 bit to 64 bit.
Signed-off-by: Cho
Use of __pa and __va macro is changed to virt_to_phys and phys_to_virt
which are recommended in driver code. printk formatting of physical
address is also fixed to %pa.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 45 +++---
1 file changed
Patch written by Antonios Motakis :
IOMMU groups are expected by certain users of the IOMMU API,
e.g. VFIO. Since each device is behind its own System MMU, we
can allocate a new IOMMU group for each device.
Reviewd-by: Cho KyongHo
Signed-off-by: Antonios Motakis
---
drivers/iommu/exynos
Since acquiring read_lock is not more frequent than write_lock, it is
not beneficial to use rwlock, this commit changes rwlock to spinlock.
Reviewed-by: Grant Grundler
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 39 ---
1 file changed, 20
to master H/W and that has a pointer to the device descriptor of a
System MMU. Given a device descriptor of a master H/W, it is possible
to traverse all System MMUs that must be controlled along with the
master H/W.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 534
domain, its driver must
call iommu_attach_device() after its local power domain is turned on,
iommu_detach_device before turned off.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 220 ++
1 file changed, 201 insertions(+), 19 deletions
prohibited unless
both of the gating clocks of System MMU and its master H/W.
CC: Tomasz Figa
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 35 ++-
1 file changed, 30 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers
exynos-iommu driver must care about master H/W's gate clock as well as
System MMU's gate clock. To enhance readability of the source code,
macros to gate/ungate those clocks are defined.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 34 ++-
policy is remained as reserved.
QoS value of page table walking is set to 15 (highst value). System
MMU 3.3 can inherit QoS value of page table walking from its master
H/W's transaction. This new feature is enabled by default and QoS
value written to MMU_CFG is ignored.
Signed-off-by: Cho Ky
This commit adds device tree support for System MMU.
Signed-off-by: Cho KyongHo
---
drivers/iommu/Kconfig|5 ++---
drivers/iommu/exynos-iommu.c | 21 +
2 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
ts to exynos-iommu
driver.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 369 +++---
1 file changed, 238 insertions(+), 131 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 3458349..6834556 100644
This commit removes custom fault handler. The device drivers that
need to register fault handler can register
with iommu_set_fault_handler().
CC: Grant Grundler
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 80 +-
1 file changed, 24
This adds gate clocks of all System MMUs and their master IPs
that are not apeared in clk-exynos5250.c and clk-exynos5420.c
Also fixes GATE_IP_ACP to 0x18800 and changed GATE_DA to GATE
for System MMU clocks in clk-exynos4.c
Signed-off-by: Cho KyongHo
---
.../devicetree/bindings/clock
This patch adds dts entries for the System MMU devices found on
Exynos4 and Exynos5 SoC series and the System MMU binding
documentation.
CC: Rob Herring
CC: Sylwester Nawrocki
Signed-off-by: Cho KyongHo
---
.../bindings/iommu/samsung,exynos4210-sysmmu.txt | 86 +++
arch/arm/boot/dts
This patch uses managed device helper functions in the probe().
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 64 +-
1 file changed, 26 insertions(+), 38 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos
System MMU driver is changed to control only a single instance of
System MMU at a time. Since a single instance of System MMU has only
a single clock descriptor for its clock gating, there is no need to
obtain two or more clock descriptors.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos
This patch removes dbgname member from sysmmu_drvdata structure.
Kernel message for debugging already has the name of a single
System MMU node.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 32 +---
1 file changed, 13 insertions(+), 19 deletions
obing device has a parent device.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c |3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index bee1bb1..8dc7031 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/dr
Since kmalloc() does not guarantee that the allignment of 1KiB when it
allocates 1KiB, it is required to allocate lv2 page table from own
slab that guarantees alignment of 1KiB
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 34 --
1 file changed
: Cho KyongHo
---
drivers/iommu/exynos-iommu.c |2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 4876d35..1c3a397 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -958,6 +958,7 @@ static size_t
controled with care because there are some
restrictions in H/W design.
The interface and implementation to initiate prefetch buffers will
be prepared later.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 16
1 file changed, 16 deletions(-)
diff --git a/drivers/iommu
This patch changes not to panic on any error when updating page table.
Instead prints error messages with callstack.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 58 --
1 file changed, 44 insertions(+), 14 deletions(-)
diff --git a
that the L2TLB has no stale data.
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c | 31 ++-
1 file changed, 26 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 4a74ed8..0d26aeb 100644
--- a/drivers
exynos-iommu.c.
CC: Tomasz Figa
Signed-off-by: Cho KyongHo
---
drivers/iommu/exynos-iommu.c |3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 0740189..4876d35 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b
Sorry for the delayed posting the v11 patchset.
The current exynos-iommu(System MMU) driver does not work autonomously
since it is lack of support for power management of peripheral blocks.
For example, MFC device driver must ensure that its System MMU is disabled
before MFC block is power-down no
On Fri, 01 Nov 2013 14:10:47 +0100, Joerg Roedel wrote:
> Hi Cho,
>
> On Fri, Nov 01, 2013 at 09:37:45PM +0900, Cho KyongHo wrote:
> > I am preparing next patches to apply Alex Williamson's comment that
> > description of IOMMU's masters must be aligned with ARM S
On Fri, 01 Nov 2013 12:42:24 +0100, Joerg Roedel wrote:
> On Mon, Oct 07, 2013 at 10:52:12AM +0900, Cho KyongHo wrote:
> > Patch summary:
> > [PATCH 01/20] iommu/exynos: do not include removed header
> > [PATCH 02/20] iommu/exynos: add missing cache flush for removed pa
On Thu, 10 Oct 2013 14:54:29 -0600, Alex Williamson wrote:
> On Mon, 2013-10-07 at 10:58 +0900, Cho KyongHo wrote:
> > Patch written by Antonios Motakis :
> >
> > IOMMU groups are expected by certain users of the IOMMU API,
> > e.g. VFIO. Since each device is behind its
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