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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-11-07 02:53:24 -0500 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-11-07 02:53:24 -0500 |
| commit | a4210abc27634294cba528a3e6e450076cb3161e (patch) | |
| tree | e215c78fe4e27ee92fc4530efebfd30654cd1052 | |
| parent | e6a21a49f50929ed8010d52378a180afeb7eb39c (diff) | |
| download | open-iov-a4210abc27634294cba528a3e6e450076cb3161e.tar.gz open-iov-a4210abc27634294cba528a3e6e450076cb3161e.zip | |
vgsp-rm: report GPU GART size + DMA flags in BUS_GET_INFO_V2
| -rw-r--r-- | kernel/gsp_rm_emulation.c | 13 | ||||
| -rw-r--r-- | kernel/gsp_rm_tu104.h | 11 |
2 files changed, 24 insertions, 0 deletions
diff --git a/kernel/gsp_rm_emulation.c b/kernel/gsp_rm_emulation.c index d0f9e61..ceb3314 100644 --- a/kernel/gsp_rm_emulation.c +++ b/kernel/gsp_rm_emulation.c @@ -2845,6 +2845,11 @@ static void gsp_rm_handle_clk_domain_info(struct gsp_emu_context *ctx, u32 cmd, * sysmem connection type"). Report a PCIe Gen3 x16 link for the emulated * vGPU and echo every requested index. */ +static u32 gsp_rm_bus_gart_mb = 4096; +module_param_named(bus_gart_mb, gsp_rm_bus_gart_mb, uint, 0644); +MODULE_PARM_DESC(bus_gart_mb, + "BUS_GET_INFO_V2 GPU_GART_SIZE in MiB (default 4096; 0 = historical zero reply, A/B)"); + static u32 tu104_bus_info_data(u32 index) { switch (index) { @@ -2865,6 +2870,14 @@ static u32 tu104_bus_info_data(u32 index) return TU104_PCIE_LINK_CTRL_STATUS_GEN3_X16; case TU104_BUS_INFO_IDX_SYSMEM_CONNECTION_TYPE: return TU104_BUS_INFO_SYSMEM_CONN_PCIE; + case TU104_BUS_INFO_IDX_GPU_GART_SIZE: + return READ_ONCE(gsp_rm_bus_gart_mb); + case TU104_BUS_INFO_IDX_GPU_GART_SIZE_ALT: + return 0; + case TU104_BUS_INFO_IDX_GPU_GART_DMA_FLAGS_0: + case TU104_BUS_INFO_IDX_GPU_GART_DMA_FLAGS_1: + /* GPUGART | CTXDMA (bits 0 | 2). */ + return 0x5u; default: return 0; } diff --git a/kernel/gsp_rm_tu104.h b/kernel/gsp_rm_tu104.h index 3382939..f623da4 100644 --- a/kernel/gsp_rm_tu104.h +++ b/kernel/gsp_rm_tu104.h @@ -945,6 +945,17 @@ struct tu104_bus_get_info_v2_params { #define TU104_BUS_INFO_IDX_PCIE_DOWNSTREAM_LINK_CTRL 0x0a #define TU104_BUS_INFO_IDX_PCIE_GEN_INFO 0x2d #define TU104_BUS_INFO_IDX_SYSMEM_CONNECTION_TYPE 0x33 +/* + * SESSION 155 CONT 26: GPU GART size / DMA flags. The GL client's buffer + * allocator reads GPU_GART_SIZE and the GPUGART/CTXDMA capability flags + * from BUS_GET_INFO_V2 at context init; a zero reply makes gpuGartSize=0, + * the heap limits 0, and every glBufferData(data)/glMapBufferRange fail + * GL_OUT_OF_MEMORY (the GZDoom GL crash). + */ +#define TU104_BUS_INFO_IDX_GPU_GART_SIZE 0x0d +#define TU104_BUS_INFO_IDX_GPU_GART_SIZE_ALT 0x32 +#define TU104_BUS_INFO_IDX_GPU_GART_DMA_FLAGS_0 0x0b +#define TU104_BUS_INFO_IDX_GPU_GART_DMA_FLAGS_1 0x0c #define TU104_BUS_INFO_TYPE_PCI_EXPRESS 0x03 #define TU104_BUS_INFO_SYSMEM_CONN_PCIE 0x00 |