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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-25 16:05:29 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-25 16:05:29 -0400 |
| commit | d6ccdaf3937b28126d5e55ba04f54ae0e3d2b8b9 (patch) | |
| tree | ce662815731e3ca8966744705ae1fa419faeeacc | |
| parent | 752e2b306af03f3e29b499ff253db047bd437232 (diff) | |
| download | open-iov-d6ccdaf3937b28126d5e55ba04f54ae0e3d2b8b9.tar.gz open-iov-d6ccdaf3937b28126d5e55ba04f54ae0e3d2b8b9.zip | |
vgsp-rm: FB_GET_INFO_V2 COMPRESSION_SIZE reports a comptag pool (wall2_fb_compr_mb, default 128 MiB) - the guest driver attempts a COMPR-enabled 64 KB-aligned comptag allocation (vendor VidHeap alloc attr COMPR=2, r703 live: the last vidheap call returns NV_ERR_NO_MEMORY 0x51) and libcuda maps that to VK_ERROR_OUT_OF_DEVICE_MEMORY (the vkAllocateMemory -2 that gates the first Vulkan frame); 0 restores the historic no-compression reply for A/B
| -rw-r--r-- | kernel/gsp_rm_emulation.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/kernel/gsp_rm_emulation.c b/kernel/gsp_rm_emulation.c index 1855908..03f861e 100644 --- a/kernel/gsp_rm_emulation.c +++ b/kernel/gsp_rm_emulation.c @@ -2665,6 +2665,20 @@ static void gsp_rm_handle_kgr_get_context_buffers_info( * L2/LTC topology from here. Echo the requested indices and fill in the * emulated TU104 values. */ +/* + * m113: FB_GET_INFO_V2 COMPRESSION_SIZE (index 0x01, bytes). The header: + * "A return value of 0 indicates the GPU does not support compression" - + * but the guest driver still attempts a COMPR-enabled, 64 KB-aligned + * comptag allocation (vendor VidHeap alloc, attr COMPR=2) and fails it + * NV_ERR_NO_MEMORY (0x51) when the comptag pool has no space, which + * libcuda maps to VK_ERROR_OUT_OF_DEVICE_MEMORY (the vkAllocateMemory -2 + * gate). Report a comptag pool sized like the real Turing parts (~fb/16). + * 0 = the historic "no compression" reply. + */ +static uint gsp_rm_fb_compr_mb = 128; +module_param_named(wall2_fb_compr_mb, gsp_rm_fb_compr_mb, uint, 0644); +MODULE_PARM_DESC(wall2_fb_compr_mb, "FB_GET_INFO_V2 COMPRESSION_SIZE in MiB (default 128, 0 = none)"); + static u32 tu104_fb_info_data(struct gsp_emu_context *ctx, u32 index) { u64 fb = nv_vgpu_fb_emul_size(ctx->vgpu); @@ -2673,7 +2687,8 @@ static u32 tu104_fb_info_data(struct gsp_emu_context *ctx, u32 index) case TU104_FB_INFO_IDX_TILE_REGION_COUNT: return 0; case TU104_FB_INFO_IDX_COMPRESSION_SIZE: - return 0; + /* m113: non-zero comptag pool (bytes) - see gsp_rm_fb_compr_mb. */ + return gsp_rm_fb_compr_mb << 20; case TU104_FB_INFO_IDX_PARTITION_COUNT: return 1; case TU104_FB_INFO_IDX_BAR1_SIZE: @@ -3536,6 +3551,7 @@ static uint gsp_rm_9096_ent_type = 3; /* entry +0x28 (u32) */ module_param_named(wall2_9096_ent_type, gsp_rm_9096_ent_type, uint, 0644); MODULE_PARM_DESC(wall2_9096_ent_type, "0x90960107 entry word at +0x28 (default 3)"); static uint gsp_rm_9096_ent_flag = 1; /* entry +0x30 (u8) */ + module_param_named(wall2_9096_ent_flag, gsp_rm_9096_ent_flag, uint, 0644); MODULE_PARM_DESC(wall2_9096_ent_flag, "0x90960107 entry flag byte at +0x30 (default 1)"); |