[reactos] 01/03: [XBOXVMP] Real OG XBOX NVidia GPU exposes 3 access ranges, so retrieve them. CORE-19011

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=61c77d1f87118b2758855…

commit 61c77d1f87118b27588554ff14ccb69a7910608b
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Wed Jun 28 15:37:55 2023 +0200
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Wed Jun 28 17:21:58 2023 +0200

    [XBOXVMP] Real OG XBOX NVidia GPU exposes 3 access ranges, so retrieve them.
    CORE-19011
    
    Fix a "bug" I introduced in commit 61012eb54.
    VideoPortGetAccessRanges() expects the caller to specify at least the
    total number of ranges the hardware exposes, otherwise it fails with
    ERROR_MORE_DATA. (Tested also with the help of Windows' videoprt.sys.)
    
    On real original XBOX there are three:
    ```
    01:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV2A [XGPU] [10de:02a0]
(rev a1)
        Subsystem: Unknown [0000:0000]
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 03
        Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
        Memory at f0000000 (32-bit, prefetchable) [size=128M]
        Memory at 00000000 (32-bit, prefetchable) [size=512K]
    ```
    
    Thanks to Stanislav and Daniel for tests on the real XBOX.
---
 win32ss/drivers/miniport/xboxvmp/xboxvmp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/win32ss/drivers/miniport/xboxvmp/xboxvmp.c
b/win32ss/drivers/miniport/xboxvmp/xboxvmp.c
index 5cf76e08b12..0c9e1f67ee8 100644
--- a/win32ss/drivers/miniport/xboxvmp/xboxvmp.c
+++ b/win32ss/drivers/miniport/xboxvmp/xboxvmp.c
@@ -62,7 +62,8 @@ XboxVmpFindAdapter(
 {
     PXBOXVMP_DEVICE_EXTENSION XboxVmpDeviceExtension;
     VP_STATUS Status;
-    VIDEO_ACCESS_RANGE AccessRanges[2];
+    /* 3 access ranges: for MMIO, VRAM, and Indirect memory access IO ports */
+    VIDEO_ACCESS_RANGE AccessRanges[3];
     USHORT VendorId = 0x10DE; /* NVIDIA Corporation */
     USHORT DeviceId = 0x02A0; /* NV2A XGPU */
     ULONG Slot = 0;