> +static int exynosauto_ufs_post_hce_enable(struct exynos_ufs *ufs)
> +{
> + struct ufs_hba *hba = ufs->hba;
> +
> + /* Enable Virtual Host #1 */
> + ufshcd_rmwl(hba, MHCTRL_EN_VH_MASK, MHCTRL_EN_VH(1), MHCTRL);
> + /* Default VH Transfer permissions */
> + hci_writel(ufs, ALLOW_TRANS_VH_DEFAULT,
> HCI_MH_ALLOWABLE_TRAN_OF_VH);
> + /* IID information is replaced in TASKTAG[7:5] instead of IID in UCD */
> + hci_writel(ufs, 0x1, HCI_MH_IID_IN_TASK_TAG);
If I understand correctly, once you set this register,
the hw takes care of properly arbitrating the requests -
PH + up to 4 VHs total of 5 machines, each supporting 32 requests doorbell.
Can you share what policy the arbiter uses among the 5 doorbells?
You are designating this change to be used in a UFS2.1 platforms, correct?
Are you planning to use the same framework for UFSHCI4.0, which uses MCQ?
Thanks,
Avri
> +
> + return 0;
> +}
