On Wed, Sep 22, 2021 at 03:36:20PM -0400, Mukul Joshi wrote:
> On Aldebaran, GPU driver will handle bad page retirement
> even though UMC is host managed. As a result, register a
> bad page retirement handler on the mce notifier chain to
> retire bad pages on Aldebaran.
>
I think this should state that the driver will do page retirement for
GPU-managed memory. As written, it implies that the driver do page retirement
in general for the system.
...
> +
> +static int amdgpu_bad_page_notifier(struct notifier_block *nb,
> + unsigned long val, void *data)
> +{
> + struct mce *m = (struct mce *)data;
> + struct amdgpu_device *adev = NULL;
> + uint32_t gpu_id = 0;
> + uint32_t umc_inst = 0;
> + uint32_t ch_inst, channel_index = 0;
> + struct ras_err_data err_data = {0, 0, 0, NULL};
> + struct eeprom_table_record err_rec;
> + uint64_t retired_page;
> +
> + /*
> + * If the error was generated in UMC_V2, which belongs to GPU UMCs,
> + * and error occurred in DramECC (Extended error code = 0) then only
> + * process the error, else bail out.
> + */
> + if (!m || !((smca_get_bank_type(m->bank) == SMCA_UMC_V2) &&
> + (XEC(m->status, 0x1f) == 0x0)))
The MCA_STATUS[ErrorCodeExt] field is bits [21:16], so the mask should be
0x3f.
> + return NOTIFY_DONE;
> +
> + /*
> + * If it is correctable error, return.
> + */
> + if (mce_is_correctable(m))
> + return NOTIFY_OK;
Shouldn't this be "NOTIFY_DONE" if "don't care" about this error?
Thanks,
Yazen
