Re: [PATCH 3/4] drm: nova: Add GETPARAM parameter to read the GPU chipset

[Timur Tabi <ttabi@nvidia.com>]

On Mon, 2026-07-06 at 15:34 +1000, Alistair Popple wrote:
> @@ -38,6 +38,7 @@ pub(crate) fn get_param(
>  
>          let value = match getparam.param as u32 {
>              uapi::NOVA_GETPARAM_VRAM_BAR_SIZE => pdev.resource_len(1)?,
> +            uapi::NOVA_GETPARAM_GPU_CHIPSET => reg_data.api.chipset() as u64,

Can we assign these IOCtl values to match Nouveau as much as possible?  I think it would make
everyone's life easier if we could use the same user-space tools/libraries for Nova that we do for
Nouveau.

#define DRM_NOUVEAU_GETPARAM           0x00
#define DRM_NOUVEAU_SETPARAM           0x01 /* deprecated */
#define DRM_NOUVEAU_CHANNEL_ALLOC      0x02
#define DRM_NOUVEAU_CHANNEL_FREE       0x03
#define DRM_NOUVEAU_GROBJ_ALLOC        0x04 /* deprecated */
#define DRM_NOUVEAU_NOTIFIEROBJ_ALLOC  0x05 /* deprecated */
#define DRM_NOUVEAU_GPUOBJ_FREE        0x06 /* deprecated */
#define DRM_NOUVEAU_NVIF               0x07
#define DRM_NOUVEAU_SVM_INIT           0x08
#define DRM_NOUVEAU_SVM_BIND           0x09
#define DRM_NOUVEAU_VM_INIT            0x10
#define DRM_NOUVEAU_VM_BIND            0x11
#define DRM_NOUVEAU_EXEC               0x12
#define DRM_NOUVEAU_GET_ZCULL_INFO     0x13
#define DRM_NOUVEAU_GEM_NEW            0x40
#define DRM_NOUVEAU_GEM_PUSHBUF        0x41
#define DRM_NOUVEAU_GEM_CPU_PREP       0x42
#define DRM_NOUVEAU_GEM_CPU_FINI       0x43
#define DRM_NOUVEAU_GEM_INFO           0x44


#define NOUVEAU_GETPARAM_PCI_VENDOR      3
#define NOUVEAU_GETPARAM_PCI_DEVICE      4
#define NOUVEAU_GETPARAM_BUS_TYPE        5
#define NOUVEAU_GETPARAM_FB_SIZE         8
#define NOUVEAU_GETPARAM_AGP_SIZE        9
#define NOUVEAU_GETPARAM_CHIPSET_ID      11
#define NOUVEAU_GETPARAM_VM_VRAM_BASE    12
#define NOUVEAU_GETPARAM_GRAPH_UNITS     13
#define NOUVEAU_GETPARAM_PTIMER_TIME     14
#define NOUVEAU_GETPARAM_HAS_BO_USAGE    15
#define NOUVEAU_GETPARAM_HAS_PAGEFLIP    16

#define NOUVEAU_GETPARAM_EXEC_PUSH_MAX   17
#define NOUVEAU_GETPARAM_VRAM_BAR_SIZE 18
#define NOUVEAU_GETPARAM_VRAM_USED 19
#define NOUVEAU_GETPARAM_HAS_VMA_TILEMODE 20