Hi,
After Hector's initial work [1] to bring up Linux on Apple's M1 it's time to
bring up more devices. Most peripherals connected to the SoC are behind a iommu
which Apple calls "Device Address Resolution Table", or DART for short [2].
Unfortunately, it only shares the name with PowerPC's DART.
C
Hi Mark,
Sorry for the spam if you get this message twice. This is pretty embarrassing
but I've just switched mail providers after ProtonMail messed up yesterday and
it looks like my new one defaulted to sending HTML messages even though I only
typed plaintext. This shouldn't have happened in t
Hi Mark,
> On 21. Mar 2021, at 17:00, Mark Kettenis wrote:
>
> I don't think the first option is going to work for PCIe. PCIe
> devices will have to use "iommu-map" properties to map PCI devices to
> the right iommu, and the currently implementation seems to assume that
> #iommu-cells = <1>.
> Date: Sat, 20 Mar 2021 15:19:33 +
> From: Sven Peter
>
> Hi,
>
> After Hector's initial work [1] to bring up Linux on Apple's M1 it's time to
> bring up more devices. Most peripherals connected to the SoC are behind a
> iommu
> which Apple calls "Device Address Resolution Table", or DART
> Date: Sun, 21 Mar 2021 18:22:15 +0100
> From: "Sven Peter"
>
> Hi Mark,
>
> On 21. Mar 2021, at 17:00, Mark Kettenis
> wrote:
>
> I don't think the first option is going to work for PCIe. PCIe
> devices will have to use "iommu-map" properties to map PCI devices to
> the right iommu, an
Hi Mark,
On Sun, Mar 21, 2021, at 19:35, Mark Kettenis wrote:
>
> Guess we do need to understand a little bit better how the USB DART
> actually works. My hypothesis (based on our discussion on #asahi) is
> that the XHCI host controller and the peripheral controller of the
> DWC3 block use diff
> Date: Mon, 22 Mar 2021 23:17:31 +0100
> From: "Sven Peter"
>
> Hi Mark,
>
> On Sun, Mar 21, 2021, at 19:35, Mark Kettenis wrote:
> >
> > Guess we do need to understand a little bit better how the USB DART
> > actually works. My hypothesis (based on our discussion on #asahi) is
> > that the XH
On Sun, Mar 21, 2021 at 05:00:50PM +0100, Mark Kettenis wrote:
> > Date: Sat, 20 Mar 2021 15:19:33 +
> > From: Sven Peter
> >
> > Hi,
> >
> > After Hector's initial work [1] to bring up Linux on Apple's M1 it's time to
> > bring up more devices. Most peripherals connected to the SoC are behi
Hi Mark,
On Tue, Mar 23, 2021, at 21:00, Mark Kettenis wrote:
> The problem with both #1 and #2 is that you end up with two references
> to (effectively) different iommu's in the dwc3 device node. I don't
> see how that is compatible with the idea of using a single translation
> table for both su
> Date: Tue, 23 Mar 2021 14:53:46 -0600
> From: Rob Herring
>
> On Sun, Mar 21, 2021 at 05:00:50PM +0100, Mark Kettenis wrote:
> > > Date: Sat, 20 Mar 2021 15:19:33 +
> > > From: Sven Peter
> > >
> > > Hi,
> > >
> > > After Hector's initial work [1] to bring up Linux on Apple's M1 it's tim
On 2021-03-20 15:19, Sven Peter wrote:
Hi,
After Hector's initial work [1] to bring up Linux on Apple's M1 it's time to
bring up more devices. Most peripherals connected to the SoC are behind a iommu
which Apple calls "Device Address Resolution Table", or DART for short [2].
Unfortunately, it on
On Tue, Mar 23, 2021, at 21:53, Rob Herring wrote:
> On Sun, Mar 21, 2021 at 05:00:50PM +0100, Mark Kettenis wrote:
> > > Date: Sat, 20 Mar 2021 15:19:33 +
> > > From: Sven Peter
> > > I have just noticed today though that at least the USB DWC3 controller in
> > > host
> > > mode uses *two
Hi Robin,
On Wed, Mar 24, 2021, at 16:29, Robin Murphy wrote:
> On 2021-03-20 15:19, Sven Peter wrote:
> >
> > I have just noticed today though that at least the USB DWC3 controller in
> > host
> > mode uses *two* darts at the same time. I'm not sure yet which parts seem to
> > require which DA
On 2021-03-25 07:53, Sven Peter wrote:
On Tue, Mar 23, 2021, at 21:53, Rob Herring wrote:
On Sun, Mar 21, 2021 at 05:00:50PM +0100, Mark Kettenis wrote:
Date: Sat, 20 Mar 2021 15:19:33 +
From: Sven Peter
I have just noticed today though that at least the USB DWC3 controller in host
mode
On Thu, Mar 25, 2021, at 12:50, Robin Murphy wrote:
> On 2021-03-25 07:53, Sven Peter wrote:
> >
> >
> > On Tue, Mar 23, 2021, at 21:53, Rob Herring wrote:
> >> On Sun, Mar 21, 2021 at 05:00:50PM +0100, Mark Kettenis wrote:
> >>>
> >>> As I mentioned before, not all DARTs support the full 32-b
On Thu, Mar 25, 2021 at 8:53 AM Sven Peter wrote:
> On Tue, Mar 23, 2021, at 21:53, Rob Herring wrote:
>
> I'm probably just confused or maybe the documentation is outdated but I don't
> see how I could specify "this device can only use DMA addresses from
> 0x0010...0x3ff0 but can map thes
> From: Arnd Bergmann
> Date: Thu, 25 Mar 2021 22:41:09 +0100
>
> On Thu, Mar 25, 2021 at 8:53 AM Sven Peter wrote:
> > On Tue, Mar 23, 2021, at 21:53, Rob Herring wrote:
> >
> > I'm probably just confused or maybe the documentation is outdated but I
> > don't
> > see how I could specify "this
On Fri, Mar 26, 2021 at 4:59 PM Mark Kettenis wrote:
>
> > From: Arnd Bergmann
> > Date: Thu, 25 Mar 2021 22:41:09 +0100
> >
> > On Thu, Mar 25, 2021 at 8:53 AM Sven Peter wrote:
> > > On Tue, Mar 23, 2021, at 21:53, Rob Herring wrote:
> > >
> > > I'm probably just confused or maybe the document
On Fri, Mar 26, 2021, at 16:59, Mark Kettenis wrote:
> Some of the DARTs provide a bypass facility. That code make using the
> standard "dma-ranges" property tricky. That property would need to
> contain the bypass address range. But that would mean that if the
> DART driver needs to look at
On Fri, Mar 26, 2021 at 5:10 PM Sven Peter wrote:
> On Fri, Mar 26, 2021, at 16:59, Mark Kettenis wrote:
> > Some of the DARTs provide a bypass facility. That code make using the
> > standard "dma-ranges" property tricky. That property would need to
> > contain the bypass address range. But tha
On Fri, Mar 26, 2021, at 17:38, Arnd Bergmann wrote:
> On Fri, Mar 26, 2021 at 5:10 PM Sven Peter wrote:
> > On Fri, Mar 26, 2021, at 16:59, Mark Kettenis wrote:
> > > Some of the DARTs provide a bypass facility. That code make using the
> > > standard "dma-ranges" property tricky. That prope
> From: Arnd Bergmann
> Date: Fri, 26 Mar 2021 17:38:24 +0100
>
> On Fri, Mar 26, 2021 at 5:10 PM Sven Peter wrote:
> > On Fri, Mar 26, 2021, at 16:59, Mark Kettenis wrote:
> > > Some of the DARTs provide a bypass facility. That code make using the
> > > standard "dma-ranges" property tricky.
On 2021-03-26 17:26, Mark Kettenis wrote:
From: Arnd Bergmann
Date: Fri, 26 Mar 2021 17:38:24 +0100
On Fri, Mar 26, 2021 at 5:10 PM Sven Peter wrote:
On Fri, Mar 26, 2021, at 16:59, Mark Kettenis wrote:
Some of the DARTs provide a bypass facility. That code make using the
standard "dma-rang
On Fri, Mar 26, 2021, at 18:34, Robin Murphy wrote:
> On 2021-03-26 17:26, Mark Kettenis wrote:
> >
> > Anyway, from my viewpoint having the information about the IOVA
> > address space sit on the devices makes little sense. This information
> > is needed by the DART driver, and there is no di
On Fri, Mar 26, 2021 at 6:51 PM Sven Peter wrote:
> On Fri, Mar 26, 2021, at 18:34, Robin Murphy wrote:
> > On 2021-03-26 17:26, Mark Kettenis wrote:
> > >
> > > Anyway, from my viewpoint having the information about the IOVA
> > > address space sit on the devices makes little sense. This informa
On Fri, Mar 26, 2021 at 6:28 PM Mark Kettenis wrote:
> I haven't figured out how the bypass stuff really works. Corellium
> added support for it in their codebase when they added support for
> Thunderbolt, and some of the DARTs that seem to be related to
> Thunderbolt do indeed have a "bypass" p
> From: Arnd Bergmann
> Date: Fri, 26 Mar 2021 21:03:32 +0100
>
> On Fri, Mar 26, 2021 at 6:28 PM Mark Kettenis wrote:
>
> > I haven't figured out how the bypass stuff really works. Corellium
> > added support for it in their codebase when they added support for
> > Thunderbolt, and some of th
> From: Arnd Bergmann
> Date: Fri, 26 Mar 2021 20:59:58 +0100
>
> On Fri, Mar 26, 2021 at 6:51 PM Sven Peter wrote:
> > On Fri, Mar 26, 2021, at 18:34, Robin Murphy wrote:
> > > On 2021-03-26 17:26, Mark Kettenis wrote:
> > > >
> > > > Anyway, from my viewpoint having the information about the I
On Fri, Mar 26, 2021, at 20:59, Arnd Bergmann wrote:
> On Fri, Mar 26, 2021 at 6:51 PM Sven Peter wrote:
> > dart-sio: 0021c000 fbde4000 (at least their Secure Enclave/TPM
> > co-processor)
>
> Same here:
> dart-sio {
>vm-base = <0x0>;
>vm-size = <0xfc00>;
>p
Hi Robin,
On Thu, Mar 25, 2021, at 12:50, Robin Murphy wrote:
> On 2021-03-25 07:53, Sven Peter wrote:
> > The iommu binding documentation [1] mentions that
> >
> > The device tree node of the IOMMU device's parent bus must contain a
> > valid
> > "dma-ranges" property that describes
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