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nouveau/winsys: add nv_device_info::max_blocks_per_mp

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This commit is contained in:
Karol Herbst 2026-04-29 12:29:41 +02:00 • committed by Karol Herbst
parent d39d48425a
commit 8da4108f0b
2 changed files with 45 additions and 0 deletions
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1
src/nouveau/headers/nv_device_info.h
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@ -55,6 +55,7 @@ struct nv_device_info {
uint16_t tpc_count;
uint8_t mp_per_tpc;
uint8_t max_warps_per_mp;
uint8_t max_blocks_per_mp;
bool has_transfer_queue;

44
src/nouveau/winsys/nouveau_device.c
View file

@ -159,6 +159,49 @@ max_warps_per_mp_for_sm(uint8_t sm)
}
}
static uint8_t
max_blocks_per_mp_for_sm(uint8_t sm)
{
/* Values taken from CUDA programming guide section "Compute Capabilities" */
switch (sm) {
case 10:
case 11:
case 12:
case 13:
case 20:
case 21:
return 8;
case 30:
case 32:
case 35:
case 37:
case 75:
case 86:
case 87:
return 16;
case 89:
case 110:
case 120:
return 24;
case 50:
case 52:
case 53:
case 60:
case 61:
case 62:
case 70:
case 72:
case 80:
case 90:
case 100:
return 32;
default:
assert(!"unkown SM version");
/* return the smallest known value */
return 8;
}
}
static uint8_t
mp_per_tpc_for_chipset(uint16_t chipset)
{
@ -538,6 +581,7 @@ nouveau_ws_device_new(drmDevicePtr drm_device)
// for now we hardcode those values, but in the future Nouveau could provide that information to
// us instead.
device->info.max_warps_per_mp = max_warps_per_mp_for_sm(device->info.sm);
device->info.max_blocks_per_mp = max_blocks_per_mp_for_sm(device->info.sm);
device->info.mp_per_tpc = mp_per_tpc_for_chipset(device->info.chipset);
/* Transfer queues require two kernel fixes: