[PATCH v2 1/2] DMA: mv_xor: Add a device_control function

[PATCH v2 1/2] DMA: mv_xor: Add a device_control function

[Andrew Lunn]

The dmatest module for DMA engines calls

device_control(dtc->chan, DMA_TERMINATE_ALL, 0);

after completing the tests. The documentation in
include/linux/dmaengine.h suggests this function is optional and
dma_async_device_register() also does not BUG_ON() when not passed a
function. However, dmatest is not the only code in the kernel
unconditionally calling device_control. So add an implementation
indicating all operations are not implemented.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
---

This patch depends on the refactoring/DT patches from Thomas.

 drivers/dma/mv_xor.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index d645d43..944d7fe 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1089,6 +1089,14 @@ static int __devexit mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
 	return 0;
 }
 
+/* This driver does not implement any of the optional DMA operations. */
+static int
+mv_xor_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+	       unsigned long arg)
+{
+	return -ENOSYS;
+}
+
 static struct mv_xor_chan * __devinit
 mv_xor_channel_add(struct mv_xor_device *xordev,
 		   struct platform_device *pdev,
@@ -1129,6 +1137,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
 	dma_dev->device_free_chan_resources = mv_xor_free_chan_resources;
 	dma_dev->device_tx_status = mv_xor_status;
 	dma_dev->device_issue_pending = mv_xor_issue_pending;
+	dma_dev->device_control = mv_xor_control;
 	dma_dev->dev = &pdev->dev;
 
 	/* set prep routines based on capability */
-- 
1.7.10.4

[PATCH v2 2/2] ARM: Kirkwood: Convert XOR instantiation to DT.

[Andrew Lunn]

Use DT to describe the two XOR DMA engines on Kirkwood. Remove the
C code initialization.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
---

These patches depend on the refactoring/DT patches from Thomas and NOT
the clock patches from me. With the clock patches, a slight different
patch is needed, specifying a clocks property in DT and no auxdata.

 arch/arm/boot/dts/kirkwood.dtsi   |   38 +++++++++++++++++++++++++++++++++++++
 arch/arm/mach-kirkwood/board-dt.c |    6 ++----
 2 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
index 4e5b815..e0ba79d 100644
--- a/arch/arm/boot/dts/kirkwood.dtsi
+++ b/arch/arm/boot/dts/kirkwood.dtsi
@@ -77,6 +77,44 @@
 			status = "okay";
 		};
 
+		xor at 60800 {
+			compatible = "marvell,orion-xor";
+			reg = <0x60800 0x100
+			       0x60A00 0x100>;
+			status = "okay";
+
+			xor00 {
+			      interrupts = <5>;
+			      dmacap,memcpy;
+			      dmacap,xor;
+			};
+			xor01 {
+			      interrupts = <6>;
+			      dmacap,memcpy;
+			      dmacap,xor;
+			      dmacap,memset;
+			};
+		};
+
+		xor at 60900 {
+			compatible = "marvell,orion-xor";
+			reg = <0x60900 0x100
+			       0xd0B00 0x100>;
+			status = "okay";
+
+			xor00 {
+			      interrupts = <7>;
+			      dmacap,memcpy;
+			      dmacap,xor;
+			};
+			xor01 {
+			      interrupts = <8>;
+			      dmacap,memcpy;
+			      dmacap,xor;
+			      dmacap,memset;
+			};
+		};
+
 		sata at 80000 {
 			compatible = "marvell,orion-sata";
 			reg = <0x80000 0x5000>;
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
index d94872f..e62f10de 100644
--- a/arch/arm/mach-kirkwood/board-dt.c
+++ b/arch/arm/mach-kirkwood/board-dt.c
@@ -34,6 +34,8 @@ struct of_dev_auxdata kirkwood_auxdata_lookup[] __initdata = {
 	OF_DEV_AUXDATA("marvell,orion-sata", 0xf1080000, "sata_mv.0", NULL),
 	OF_DEV_AUXDATA("marvell,orion-nand", 0xf4000000, "orion_nand", NULL),
 	OF_DEV_AUXDATA("marvell,orion-crypto", 0xf1030000, "mv_crypto", NULL),
+	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060800, "mv_xor.0", NULL),
+	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060900, "mv_xor.1", NULL),
 	{},
 };
 
@@ -56,10 +58,6 @@ static void __init kirkwood_dt_init(void)
 	/* Setup root of clk tree */
 	kirkwood_clk_init();
 
-	/* internal devices that every board has */
-	kirkwood_xor0_init();
-	kirkwood_xor1_init();
-
 #ifdef CONFIG_KEXEC
 	kexec_reinit = kirkwood_enable_pcie;
 #endif
-- 
1.7.10.4

[PATCH v2 1/2] DMA: mv_xor: Add a device_control function

[Thomas Petazzoni]

Andrew,

On Sun, 18 Nov 2012 11:44:56 +0100, Andrew Lunn wrote:
> The dmatest module for DMA engines calls
> 
> device_control(dtc->chan, DMA_TERMINATE_ALL, 0);
> 
> after completing the tests. The documentation in
> include/linux/dmaengine.h suggests this function is optional and
> dma_async_device_register() also does not BUG_ON() when not passed a
> function. However, dmatest is not the only code in the kernel
> unconditionally calling device_control. So add an implementation
> indicating all operations are not implemented.
> 
> Signed-off-by: Andrew Lunn <andrew@lunn.ch>

Thanks, I have applied your patch and made it part of the XOR patch set
I have, for which I intend to send a pull request to you tomorrow.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[PATCH v2 2/2] ARM: Kirkwood: Convert XOR instantiation to DT.

[Thomas Petazzoni]

Andrew,

On Sun, 18 Nov 2012 11:44:57 +0100, Andrew Lunn wrote:
> Use DT to describe the two XOR DMA engines on Kirkwood. Remove the
> C code initialization.
> 
> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> ---
> 
> These patches depend on the refactoring/DT patches from Thomas and NOT
> the clock patches from me. With the clock patches, a slight different
> patch is needed, specifying a clocks property in DT and no auxdata.

My XOR patch set already depended on the previous clock series from
Gregory, so I'm going to rebase it on top of your clock series. Would
you mind sharing with me the version of this patch that works on top of
your clock patch set?

I guess it's just the removal of the auxdata, and addition of

	clocks = <&gate_clk 8>;

for the first XOR engine, and:

	clocks = <&gate_clk 16>;

for the second XOR engine.

If this is correct, I'll integrate your patch in my XOR patches so that
you'll get a complete pull request with all the related XOR changes.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[PATCH v2 2/2] ARM: Kirkwood: Convert XOR instantiation to DT.

[Andrew Lunn]

On Sun, Nov 18, 2012 at 06:40:32PM +0100, Thomas Petazzoni wrote:
> Andrew,
> 
> On Sun, 18 Nov 2012 11:44:57 +0100, Andrew Lunn wrote:
> > Use DT to describe the two XOR DMA engines on Kirkwood. Remove the
> > C code initialization.
> > 
> > Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> > ---
> > 
> > These patches depend on the refactoring/DT patches from Thomas and NOT
> > the clock patches from me. With the clock patches, a slight different
> > patch is needed, specifying a clocks property in DT and no auxdata.
> 
> My XOR patch set already depended on the previous clock series from
> Gregory, so I'm going to rebase it on top of your clock series. Would
> you mind sharing with me the version of this patch that works on top of
> your clock patch set?

Hi Thomas

I never create the patch for on top of my clock series.

> I guess it's just the removal of the auxdata, and addition of
> 
> 	clocks = <&gate_clk 8>;
> 
> for the first XOR engine, and:
> 
> 	clocks = <&gate_clk 16>;
> 
> for the second XOR engine.

Correct.

> 
> If this is correct, I'll integrate your patch in my XOR patches so that
> you'll get a complete pull request with all the related XOR changes.

O.K.

We probably need a new ACK from Mike Turquette for the updated clock
patches.

      Andrew

[PATCH v2 2/2] ARM: Kirkwood: Convert XOR instantiation to DT.

[Jason Cooper]

On Sun, Nov 18, 2012 at 11:44:57AM +0100, Andrew Lunn wrote:
> Use DT to describe the two XOR DMA engines on Kirkwood. Remove the
> C code initialization.
> 
> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> ---
> 
> These patches depend on the refactoring/DT patches from Thomas and NOT
> the clock patches from me. With the clock patches, a slight different
> patch is needed, specifying a clocks property in DT and no auxdata.
> 
>  arch/arm/boot/dts/kirkwood.dtsi   |   38 +++++++++++++++++++++++++++++++++++++
>  arch/arm/mach-kirkwood/board-dt.c |    6 ++----
>  2 files changed, 40 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
> index 4e5b815..e0ba79d 100644
> --- a/arch/arm/boot/dts/kirkwood.dtsi
> +++ b/arch/arm/boot/dts/kirkwood.dtsi
> @@ -77,6 +77,44 @@
>  			status = "okay";
>  		};
>  
> +		xor at 60800 {
> +			compatible = "marvell,orion-xor";
> +			reg = <0x60800 0x100
> +			       0x60A00 0x100>;
> +			status = "okay";
> +
> +			xor00 {
> +			      interrupts = <5>;
> +			      dmacap,memcpy;
> +			      dmacap,xor;
> +			};
> +			xor01 {
> +			      interrupts = <6>;
> +			      dmacap,memcpy;
> +			      dmacap,xor;
> +			      dmacap,memset;
> +			};
> +		};
> +
> +		xor at 60900 {
> +			compatible = "marvell,orion-xor";
> +			reg = <0x60900 0x100
> +			       0xd0B00 0x100>;
> +			status = "okay";
> +
> +			xor00 {
> +			      interrupts = <7>;
> +			      dmacap,memcpy;
> +			      dmacap,xor;
> +			};
> +			xor01 {
> +			      interrupts = <8>;
> +			      dmacap,memcpy;
> +			      dmacap,xor;
> +			      dmacap,memset;
> +			};
> +		};
> +
>  		sata at 80000 {
>  			compatible = "marvell,orion-sata";
>  			reg = <0x80000 0x5000>;
> diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
> index d94872f..e62f10de 100644
> --- a/arch/arm/mach-kirkwood/board-dt.c
> +++ b/arch/arm/mach-kirkwood/board-dt.c
> @@ -34,6 +34,8 @@ struct of_dev_auxdata kirkwood_auxdata_lookup[] __initdata = {
>  	OF_DEV_AUXDATA("marvell,orion-sata", 0xf1080000, "sata_mv.0", NULL),
>  	OF_DEV_AUXDATA("marvell,orion-nand", 0xf4000000, "orion_nand", NULL),
>  	OF_DEV_AUXDATA("marvell,orion-crypto", 0xf1030000, "mv_crypto", NULL),
> +	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060800, "mv_xor.0", NULL),
> +	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060900, "mv_xor.1", NULL),

This conflicts with the earlier clock work.  I'll be pushing mvebu/dt in
a bit, could you please rebase these two patches against that?

thx,

Jason.

[PATCH v2 2/2] ARM: Kirkwood: Convert XOR instantiation to DT.

[Andrew Lunn]

On Mon, Nov 19, 2012 at 01:37:57AM -0500, Jason Cooper wrote:
> On Sun, Nov 18, 2012 at 11:44:57AM +0100, Andrew Lunn wrote:
> > Use DT to describe the two XOR DMA engines on Kirkwood. Remove the
> > C code initialization.
> > 
> > Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> > ---
> > 
> > These patches depend on the refactoring/DT patches from Thomas and NOT
> > the clock patches from me. With the clock patches, a slight different
> > patch is needed, specifying a clocks property in DT and no auxdata.
> > 
> >  arch/arm/boot/dts/kirkwood.dtsi   |   38 +++++++++++++++++++++++++++++++++++++
> >  arch/arm/mach-kirkwood/board-dt.c |    6 ++----
> >  2 files changed, 40 insertions(+), 4 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
> > index 4e5b815..e0ba79d 100644
> > --- a/arch/arm/boot/dts/kirkwood.dtsi
> > +++ b/arch/arm/boot/dts/kirkwood.dtsi
> > @@ -77,6 +77,44 @@
> >  			status = "okay";
> >  		};
> >  
> > +		xor at 60800 {
> > +			compatible = "marvell,orion-xor";
> > +			reg = <0x60800 0x100
> > +			       0x60A00 0x100>;
> > +			status = "okay";
> > +
> > +			xor00 {
> > +			      interrupts = <5>;
> > +			      dmacap,memcpy;
> > +			      dmacap,xor;
> > +			};
> > +			xor01 {
> > +			      interrupts = <6>;
> > +			      dmacap,memcpy;
> > +			      dmacap,xor;
> > +			      dmacap,memset;
> > +			};
> > +		};
> > +
> > +		xor at 60900 {
> > +			compatible = "marvell,orion-xor";
> > +			reg = <0x60900 0x100
> > +			       0xd0B00 0x100>;
> > +			status = "okay";
> > +
> > +			xor00 {
> > +			      interrupts = <7>;
> > +			      dmacap,memcpy;
> > +			      dmacap,xor;
> > +			};
> > +			xor01 {
> > +			      interrupts = <8>;
> > +			      dmacap,memcpy;
> > +			      dmacap,xor;
> > +			      dmacap,memset;
> > +			};
> > +		};
> > +
> >  		sata at 80000 {
> >  			compatible = "marvell,orion-sata";
> >  			reg = <0x80000 0x5000>;
> > diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
> > index d94872f..e62f10de 100644
> > --- a/arch/arm/mach-kirkwood/board-dt.c
> > +++ b/arch/arm/mach-kirkwood/board-dt.c
> > @@ -34,6 +34,8 @@ struct of_dev_auxdata kirkwood_auxdata_lookup[] __initdata = {
> >  	OF_DEV_AUXDATA("marvell,orion-sata", 0xf1080000, "sata_mv.0", NULL),
> >  	OF_DEV_AUXDATA("marvell,orion-nand", 0xf4000000, "orion_nand", NULL),
> >  	OF_DEV_AUXDATA("marvell,orion-crypto", 0xf1030000, "mv_crypto", NULL),
> > +	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060800, "mv_xor.0", NULL),
> > +	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060900, "mv_xor.1", NULL),
> 
> This conflicts with the earlier clock work.  I'll be pushing mvebu/dt in
> a bit, could you please rebase these two patches against that?

Thomas has a v2 in the works which should solve that and Sebastians comments.

       Andrew

[PATCH v2 2/2] ARM: Kirkwood: Convert XOR instantiation to DT.

[Jason Cooper]

On Mon, Nov 19, 2012 at 07:41:43AM +0100, Andrew Lunn wrote:
> On Mon, Nov 19, 2012 at 01:37:57AM -0500, Jason Cooper wrote:
> > On Sun, Nov 18, 2012 at 11:44:57AM +0100, Andrew Lunn wrote:
> > > Use DT to describe the two XOR DMA engines on Kirkwood. Remove the
> > > C code initialization.
> > > 
> > > Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> > > ---
> > > 
> > > These patches depend on the refactoring/DT patches from Thomas and NOT
> > > the clock patches from me. With the clock patches, a slight different
> > > patch is needed, specifying a clocks property in DT and no auxdata.
> > > 
> > >  arch/arm/boot/dts/kirkwood.dtsi   |   38 +++++++++++++++++++++++++++++++++++++
> > >  arch/arm/mach-kirkwood/board-dt.c |    6 ++----
> > >  2 files changed, 40 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
> > > index 4e5b815..e0ba79d 100644
> > > --- a/arch/arm/boot/dts/kirkwood.dtsi
> > > +++ b/arch/arm/boot/dts/kirkwood.dtsi
> > > @@ -77,6 +77,44 @@
> > >  			status = "okay";
> > >  		};
> > >  
> > > +		xor at 60800 {
> > > +			compatible = "marvell,orion-xor";
> > > +			reg = <0x60800 0x100
> > > +			       0x60A00 0x100>;
> > > +			status = "okay";
> > > +
> > > +			xor00 {
> > > +			      interrupts = <5>;
> > > +			      dmacap,memcpy;
> > > +			      dmacap,xor;
> > > +			};
> > > +			xor01 {
> > > +			      interrupts = <6>;
> > > +			      dmacap,memcpy;
> > > +			      dmacap,xor;
> > > +			      dmacap,memset;
> > > +			};
> > > +		};
> > > +
> > > +		xor at 60900 {
> > > +			compatible = "marvell,orion-xor";
> > > +			reg = <0x60900 0x100
> > > +			       0xd0B00 0x100>;
> > > +			status = "okay";
> > > +
> > > +			xor00 {
> > > +			      interrupts = <7>;
> > > +			      dmacap,memcpy;
> > > +			      dmacap,xor;
> > > +			};
> > > +			xor01 {
> > > +			      interrupts = <8>;
> > > +			      dmacap,memcpy;
> > > +			      dmacap,xor;
> > > +			      dmacap,memset;
> > > +			};
> > > +		};
> > > +
> > >  		sata at 80000 {
> > >  			compatible = "marvell,orion-sata";
> > >  			reg = <0x80000 0x5000>;
> > > diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
> > > index d94872f..e62f10de 100644
> > > --- a/arch/arm/mach-kirkwood/board-dt.c
> > > +++ b/arch/arm/mach-kirkwood/board-dt.c
> > > @@ -34,6 +34,8 @@ struct of_dev_auxdata kirkwood_auxdata_lookup[] __initdata = {
> > >  	OF_DEV_AUXDATA("marvell,orion-sata", 0xf1080000, "sata_mv.0", NULL),
> > >  	OF_DEV_AUXDATA("marvell,orion-nand", 0xf4000000, "orion_nand", NULL),
> > >  	OF_DEV_AUXDATA("marvell,orion-crypto", 0xf1030000, "mv_crypto", NULL),
> > > +	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060800, "mv_xor.0", NULL),
> > > +	OF_DEV_AUXDATA("marvell,orion-xor", 0xf1060900, "mv_xor.1", NULL),
> > 
> > This conflicts with the earlier clock work.  I'll be pushing mvebu/dt in
> > a bit, could you please rebase these two patches against that?
> 
> Thomas has a v2 in the works which should solve that and Sebastians comments.

Cool, thx.

Jason.