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drm/amdgpu: Do not wait for MP0_C2PMSG_33 IFWI init in SRIOV

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SRIOV does not need to wait for IFWI init, and MP0_C2PMSG_33 is blocked
for VF access.

Signed-off-by: Victor Lu <victorchengchi.lu@amd.com>
Reviewed-by: Vignesh Chander <Vignesh.Chander@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Victor Lu 2024-05-31 14:59:22 -04:00 committed by Alex Deucher
parent 4b5b855c24
commit b32563859d
1 changed files with 14 additions and 12 deletions
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26
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
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@ -260,19 +260,21 @@ static int amdgpu_discovery_read_binary_from_mem(struct amdgpu_device *adev,
u32 msg;
int i, ret = 0;
/* It can take up to a second for IFWI init to complete on some dGPUs,
* but generally it should be in the 60-100ms range. Normally this starts
* as soon as the device gets power so by the time the OS loads this has long
* completed. However, when a card is hotplugged via e.g., USB4, we need to
* wait for this to complete. Once the C2PMSG is updated, we can
* continue.
*/
if (!amdgpu_sriov_vf(adev)) {
/* It can take up to a second for IFWI init to complete on some dGPUs,
* but generally it should be in the 60-100ms range. Normally this starts
* as soon as the device gets power so by the time the OS loads this has long
* completed. However, when a card is hotplugged via e.g., USB4, we need to
* wait for this to complete. Once the C2PMSG is updated, we can
* continue.
*/
for (i = 0; i < 1000; i++) {
msg = RREG32(mmMP0_SMN_C2PMSG_33);
if (msg & 0x80000000)
break;
usleep_range(1000, 1100);
for (i = 0; i < 1000; i++) {
msg = RREG32(mmMP0_SMN_C2PMSG_33);
if (msg & 0x80000000)
break;
usleep_range(1000, 1100);
}
}
vram_size = (uint64_t)RREG32(mmRCC_CONFIG_MEMSIZE) << 20;