Am 2020-09-29 um 7:31 a.m. schrieb Kent Russell:
> The VG20 DIDs 66a0, 66a1 and 66a4 are used for various SKUs that may or may
> not have the FRU EEPROM on it. Parse the VBIOS to check for server SKU
> variants (D131 or D134) until a more general solution can be determined.
>
> Signed-off-by: Kent Russell <kent.russ...@amd.com>
> ---
> .../gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c | 37 +++++++++++++------
> 1 file changed, 26 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
> index e811fecc540f..82207b758800 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
> @@ -34,18 +34,33 @@
>
> static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
> {
> - /* TODO: Gaming SKUs don't have the FRU EEPROM.
> - * Use this hack to address hangs on modprobe on gaming SKUs
> - * until a proper solution can be implemented by only supporting
> - * the explicit chip IDs for VG20 Server cards
> - *
> - * TODO: Add list of supported Arcturus DIDs once confirmed
> + /* TODO: See if we can figure this out dynamically instead of
> + * having to parse VBIOS versions.
> */
> - if ((adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a0) ||
> - (adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a1) ||
> - (adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a4))
> - return true;
> - return false;
> + struct atom_context *atom_ctx = adev->mode_info.atom_context;
> + char model[3];
> + int modelnum;
> +
> + /* VBIOS is of the format ###-DXXXXYY-XX. We only want the first
I'm not sure I understand the format here. There are four X, but you
only want the first three of them?
What are the two X in the end? are they related to the first four X?
> + * 3 digits after the D, and if we convert it to a hex integer,
> + * we can use switch for ease/speed/readability and potential
> + * expandability if required
> + */
> + strncpy(model, atom_ctx->vbios_version + 5, 3);
This produces a string in _model_ that's not 0-terminated.
> + modelnum = strtoul(model, NULL, 16);
Using strtoul on a non-terminated string is not reliable.
Regards,
Felix
> + switch (adev->asic_type) {
> + case CHIP_VEGA20:
> + switch (modelnum) {
> + /* These are the server VG20 SKUs */
> + case 0x161:
> + case 0x163:
> + return true;
> + default:
> + return false;
> + }
> + default:
> + return false;
> + }
> }
>
> static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t
> addrptr,
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