Hi, On 10/26/23 02:11, Lukas Wunner wrote:
This has recently been brought up internally at Intel and nobody could understand why there's a whitelist in the first place. A long-time PCI architect told me that Intel silicon validation has been testing P2PDMA at least since the Lindenhurst days, i.e. since 2005.
My PCIe test box generates URE completions in the root complex when I try to address iGPU BARs from an FPGA, and texture fetches from the iGPU that use BAR addresses on the FPGA do not get forwarded (so I venture that is an URE as well).
CPU: i3-3225 CPU @ 3.30GHz (fam: 06, model: 3a, stepping: 09) pci 0000:00:00.0: [8086:0150] type 00 class 0x060000 pci 0000:00:01.0: [8086:0151] type 01 class 0x060400 pci 0000:00:02.0: [8086:0162] type 00 class 0x030000 pci 0000:00:14.0: [8086:1e31] type 00 class 0x0c0330 pci 0000:00:16.0: [8086:1e3a] type 00 class 0x078000 pci 0000:00:1a.0: [8086:1e2d] type 00 class 0x0c0320 pci 0000:00:1b.0: [8086:1e20] type 00 class 0x040300 pci 0000:00:1c.0: [8086:1e10] type 01 class 0x060400 pci 0000:00:1c.4: [8086:1e18] type 01 class 0x060400 pci 0000:00:1d.0: [8086:1e26] type 00 class 0x0c0320 pci 0000:00:1f.0: [8086:1e4a] type 00 class 0x060100 pci 0000:00:1f.2: [8086:1e00] type 00 class 0x01018f pci 0000:00:1f.3: [8086:1e22] type 00 class 0x0c0500 pci 0000:00:1f.5: [8086:1e08] type 00 class 0x010185 pci 0000:01:00.0: [1172:1337] type 00 class 0xff0000 pci 0000:03:00.0: [10ec:8168] type 00 class 0x020000 So there is at least one configuration that doesn't work. :P Simon
