On 05/09/2024 08:40, Jan Kiszka wrote: > On 05.09.24 08:32, Krzysztof Kozlowski wrote: >> On Wed, Sep 04, 2024 at 12:00:11PM +0200, Jan Kiszka wrote: >>> From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> >>> >>> The PVU on the AM65 SoC is capable of restricting DMA from PCIe devices >>> to specific regions of host memory. Add the optional property >>> "memory-regions" to point to such regions of memory when PVU is used. >>> >>> Since the PVU deals with system physical addresses, utilizing the PVU >>> with PCIe devices also requires setting up the VMAP registers to map the >>> Requester ID of the PCIe device to the CBA Virtual ID, which in turn is >>> mapped to the system physical address. Hence, describe the VMAP >>> registers which are optionally unless the PVU shall used for PCIe. >>> >>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> >>> --- >>> CC: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx> >>> CC: "Krzysztof Wilczyński" <kw@xxxxxxxxx> >>> CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> >>> CC: linux-pci@xxxxxxxxxxxxxxx >>> --- >>> .../bindings/pci/ti,am65-pci-host.yaml | 52 ++++++++++++++----- >>> 1 file changed, 40 insertions(+), 12 deletions(-) >>> >>> diff --git a/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml b/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml >>> index 0a9d10532cc8..d8182bad92de 100644 >>> --- a/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml >>> +++ b/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml >>> @@ -19,16 +19,6 @@ properties: >>> - ti,am654-pcie-rc >>> - ti,keystone-pcie >>> >>> - reg: >>> - maxItems: 4 >>> - >>> - reg-names: >>> - items: >>> - - const: app >>> - - const: dbics >>> - - const: config >>> - - const: atu >> >> >> Nothing improved here. > > Yes, explained the background to you. Sorry, if you do not address my > replies, I'm lost with your feedback. My magic ball could not figure out the problem, so did not provide the answer. I gave you the exact code which illustrates how to do it. If you do it that way: it works. If you do it other way: it might not work. However without seeing anything, magic ball was silent, so I am not participating in game: would you be so kind to give more information so I won't waste my day in asking what is wrong. Best regards, Krzysztof
