[PATCH] ARM: DT: stm32: move dma translation to board files
Bruno Herrera
bruherrera at gmail.com
Mon Oct 31 09:41:31 PDT 2016
On Mon, Oct 31, 2016 at 12:14 PM, Radosław Pietrzyk
<radoslaw.pietrzyk at gmail.com> wrote:
> This is weird because dma ddresses are recalculated using parent's
> dma-ranges property and soc already has it so there should be absolutely no
> problem.
These are my DTS and DTSI file.
>
> 2016-10-31 11:27 GMT+01:00 Bruno Herrera <bruherrera at gmail.com>:
>>
>> On Fri, Oct 28, 2016 at 5:09 AM, Radosław Pietrzyk
>> <radoslaw.pietrzyk at gmail.com> wrote:
>> > Have you defined your sdio node within soc node ?
>>
>> It is in the SOC node of the DSTI file.
>>
>> >
>> > 2016-10-27 14:57 GMT+02:00 Bruno Herrera <bruherrera at gmail.com>:
>> >>
>> >> Hi Alex,
>> >>
>> >> On Thu, Oct 27, 2016 at 10:21 AM, Alexandre Torgue
>> >> <alexandre.torgue at st.com> wrote:
>> >> > Hi Bruno,
>> >> >
>> >> >
>> >> > On 10/27/2016 12:43 PM, Bruno Herrera wrote:
>> >> >>
>> >> >> Hi Alex,
>> >> >>
>> >> >> On Wed, Oct 26, 2016 at 7:09 AM, Alexandre Torgue
>> >> >> <alexandre.torgue at st.com> wrote:
>> >> >>>
>> >> >>> Hi Bruno,
>> >> >>>
>> >> >>> On 10/25/2016 11:06 PM, Bruno Herrera wrote:
>> >> >>>>
>> >> >>>>
>> >> >>>> Hi Alexandre,
>> >> >>>>
>> >> >>>>>
>> >> >>>>> stm32f469-disco and stm32f429-eval boards use SDRAM start address
>> >> >>>>> remapping
>> >> >>>>> (to @0) to boost performances. A DMA translation through
>> >> >>>>> "dma-ranges"
>> >> >>>>> property was needed for other masters than the M4 CPU.
>> >> >>>>> stm32f429-disco doesn't use remapping so doesn't need this DMA
>> >> >>>>> translation.
>> >> >>>>> This patches moves this DMA translation definition from stm32f429
>> >> >>>>> soc
>> >> >>>>> file
>> >> >>>>> to board files.
>> >> >>>>>
>> >> >>>>> Signed-off-by: Alexandre TORGUE <alexandre.torgue at st.com>
>> >> >>>>>
>> >> >>>>> diff --git a/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>>> b/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>>> index 13c7cd2..a763c15 100644
>> >> >>>>> --- a/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>>> +++ b/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>>> @@ -82,6 +82,10 @@
>> >> >>>>> };
>> >> >>>>> };
>> >> >>>>>
>> >> >>>>> + soc {
>> >> >>>>> + dma-ranges = <0xc0000000 0x0 0x10000000>;
>> >> >>>>> + };
>> >> >>>>> +
>> >> >>>>> usbotg_hs_phy: usbphy {
>> >> >>>>> #phy-cells = <0>;
>> >> >>>>> compatible = "usb-nop-xceiv";
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>> Shouldn't also the peripheral dma-ranges property move to board
>> >> >>>> specific
>> >> >>>> too?
>> >> >>>> I had this patch for while but I didn't had the time to submit:
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> Well spot I forgot it. Actually, discussing with Arnd ysterday on
>> >> >>> IIRC,
>> >> >>> empty dma-ranges is not needed. Can you test on your side by
>> >> >>> removing
>> >> >>> dma-ranges in usb node please ?
>> >> >>
>> >> >> Unfortunately will take a time for me to set up this environment on
>> >> >> the STM32F4-EVAL board.
>> >> >> And on the discovery boards we dont have this scenario. That was the
>> >> >> main reason I did not submit the patch right away.
>> >> >> My conclusion and I might be wrong but is based on the my tests with
>> >> >> SDIO device at STM32F469I-DISCO board.
>> >> >>
>> >> >> I started this issue as discussion at ST Forum but Maxime gave me
>> >> >> the
>> >> >> hint.
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https%3a%2f%2fmy%2est%2ecom%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fDMA2%20and%20SYSCFG_MEMRMP%20relationship&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B¤tviews=44
>> >> >>
>> >> >>> I will push a v2 by removing empty dma-ranges if tests are ok in
>> >> >>> your
>> >> >>> side.
>> >> >>
>> >> >>
>> >> >> From my understating/conclusion is: when empty property(dma-ranges)
>> >> >> is
>> >> >> the device node, the mapping will be taken in consideration when
>> >> >> using
>> >> >> DMA otherwise the mapping is ignored.
>> >> >> And in the SDIO case it is needed for DEV->MEM(SDRAM) and
>> >> >> MEM(SDRAM)->DEV. If it is not the case for the devices in question
>> >> >> so
>> >> >> I suppose it can work without the property.
>> >> >
>> >> >
>> >> > For sure translation has to be done but I'm not sure that an empty
>> >> > "dma-ranges" is needed in device node to activate it. For Ethernet
>> >> > empty
>> >> > "dma-ranges" is not needed. I will try with usb.
>> >>
>> >> In the case of SDIO it is needed. As example this is my working SDIO
>> >> node:
>> >>
>> >> sdio: sdio at 40012c00 {
>> >> compatible = "arm,pl18x", "arm,primecell";
>> >> arm,primecell-periphid = <0x00480181>;
>> >> reg = <0x40012c00 0x400>;
>> >> dmas = <&dma2 6 4 0x10400 0x3>, /* Logical - DevToMem */
>> >> <&dma2 3 4 0x10400 0x3>; /* Logical - MemToDev */
>> >> dma-names = "rx", "tx";
>> >> clocks = <&rcc 0 171>;
>> >> clock-names = "apb_pclk";
>> >> interrupts = <49>;
>> >> status = "disabled";
>> >> };
>> >>
>> >> &sdio {
>> >> status = "okay";
>> >> vmmc-supply = <&wlan_en>;
>> >> bus-width = <4>;
>> >> max-frequency = <24000000>;
>> >> pinctrl-names = "default";
>> >> pinctrl-0 = <&sdio_pins>;
>> >> ti,non-removable;
>> >> ti,needs-special-hs-handling;
>> >> dma-ranges;
>> >> cap-power-off-card;
>> >> keep-power-in-suspend;
>> >>
>> >> #address-cells = <1>;
>> >> #size-cells = <0>;
>> >> wlcore: wlcore at 0 {
>> >> compatible = "ti,wl1835";
>> >> reg = <2>;
>> >> interrupt-parent = <&gpioa>;
>> >> interrupts = <8 IRQ_TYPE_EDGE_RISING>;
>> >> };
>> >> };
>> >>
>> >> >
>> >> > alex
>> >> >
>> >> >
>> >> >>
>> >> >>>
>> >> >>> Thanks in advance
>> >> >>> Alex
>> >> >>>
>> >> >>>
>> >> >>>>
>> >> >>>> Author: Bruno Herrera <bruherrera at gmail.com>
>> >> >>>> Date: Sun Oct 16 14:50:00 2016 -0200
>> >> >>>>
>> >> >>>> ARM: DT: STM32: Use dma-ranges property per board not at dtsi
>> >> >>>> file
>> >> >>>>
>> >> >>>> diff --git a/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>> b/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>> index 6bfc595..2a22a82 100644
>> >> >>>> --- a/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>> +++ b/arch/arm/boot/dts/stm32429i-eval.dts
>> >> >>>> @@ -52,6 +52,10 @@
>> >> >>>> model = "STMicroelectronics STM32429i-EVAL board";
>> >> >>>> compatible = "st,stm32429i-eval", "st,stm32f429";
>> >> >>>>
>> >> >>>> + soc {
>> >> >>>> + dma-ranges = <0xC0000000 0x0 0x10000000>;
>> >> >>>> + };
>> >> >>>> +
>> >> >>>> chosen {
>> >> >>>> bootargs = "root=/dev/ram rdinit=/linuxrc";
>> >> >>>> stdout-path = "serial0:115200n8";
>> >> >>>> @@ -96,6 +100,7 @@
>> >> >>>>
>> >> >>>> ðernet0 {
>> >> >>>> status = "okay";
>> >> >>>> + dma-ranges;
>> >> >>>> pinctrl-0 = <ðernet0_mii>;
>> >> >>>> pinctrl-names = "default";
>> >> >>>> phy-mode = "mii-id";
>> >> >>>> @@ -116,6 +121,7 @@
>> >> >>>> };
>> >> >>>>
>> >> >>>> &usbotg_hs {
>> >> >>>> + dma-ranges;
>> >> >>>> dr_mode = "host";
>> >> >>>> phys = <&usbotg_hs_phy>;
>> >> >>>> phy-names = "usb2-phy";
>> >> >>>> diff --git a/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>> b/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>> index 7d624a2..697a133 100644
>> >> >>>> --- a/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>> +++ b/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>> @@ -59,7 +59,6 @@
>> >> >>>> };
>> >> >>>>
>> >> >>>> soc {
>> >> >>>> - dma-ranges = <0xc0000000 0x0 0x10000000>;
>> >> >>>>
>> >> >>>> timer2: timer at 40000000 {
>> >> >>>> compatible = "st,stm32-timer";
>> >> >>>> @@ -472,13 +471,11 @@
>> >> >>>> st,syscon = <&syscfg 0x4>;
>> >> >>>> snps,pbl = <8>;
>> >> >>>> snps,mixed-burst;
>> >> >>>> - dma-ranges;
>> >> >>>> status = "disabled";
>> >> >>>> };
>> >> >>>>
>> >> >>>> usbotg_hs: usb at 40040000 {
>> >> >>>> compatible = "snps,dwc2";
>> >> >>>> - dma-ranges;
>> >> >>>> reg = <0x40040000 0x40000>;
>> >> >>>> interrupts = <77>;
>> >> >>>> clocks = <&rcc 0 29>;
>> >> >>>>
>> >> >>>>
>> >> >>>>> diff --git a/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>>> b/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>>> index 0596d60..3a1cfdd 100644
>> >> >>>>> --- a/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>>> +++ b/arch/arm/boot/dts/stm32f429.dtsi
>> >> >>>>> @@ -59,8 +59,6 @@
>> >> >>>>> };
>> >> >>>>>
>> >> >>>>> soc {
>> >> >>>>> - dma-ranges = <0xc0000000 0x0 0x10000000>;
>> >> >>>>> -
>> >> >>>>> timer2: timer at 40000000 {
>> >> >>>>> compatible = "st,stm32-timer";
>> >> >>>>> reg = <0x40000000 0x400>;
>> >> >>>>> diff --git a/arch/arm/boot/dts/stm32f469-disco.dts
>> >> >>>>> b/arch/arm/boot/dts/stm32f469-disco.dts
>> >> >>>>> index 9e73656..c2213c0 100644
>> >> >>>>> --- a/arch/arm/boot/dts/stm32f469-disco.dts
>> >> >>>>> +++ b/arch/arm/boot/dts/stm32f469-disco.dts
>> >> >>>>> @@ -64,6 +64,10 @@
>> >> >>>>> aliases {
>> >> >>>>> serial0 = &usart3;
>> >> >>>>> };
>> >> >>>>> +
>> >> >>>>> + soc {
>> >> >>>>> + dma-ranges = <0xc0000000 0x0 0x10000000>;
>> >> >>>>> + };
>> >> >>>>> };
>> >> >>>>>
>> >> >>>>> &clk_hse {
>> >> >>>>> --
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>> Br.,
>> >> >>>> Bruno
>> >> >>>>
>> >> >>>
>> >> >
>> >>
>> >> _______________________________________________
>> >> linux-arm-kernel mailing list
>> >> linux-arm-kernel at lists.infradead.org
>> >> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>> >
>> >
>
>
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