RE: [PATCH v24 4/4] scsi: ufs: Add HPB 2.0 support

[Avri Altman]

> 
> 
> > +static int ufshpb_issue_umap_all_req(struct ufshpb_lu *hpb)
> Maybe ufshpb_issue_umap_all_req is just a wrapper for
> ufshpb_issue_umap_req?
> e.g it calls ufshpb_issue_umap_req(hpb, int read_buferr_id = 0x3) ?
> Then on host mode inactivation:
> static int ufshpb_issue_umap_single_req(struct ufshpb_lu *hpb)
> {
>         return ufshpb_issue_umap_req(hpb, 0x1);
> }
Better yet, ufshpb_execute_umap_req can get *rgn as an extra argument.
ufshpb_issue_umap_all_req will call it with NULL, while
ufshpb_issue_umap_single_req will call it with the rgn to inactivate.

Then,  ufshpb_set_unmap_cmd takes the form:
static void ufshpb_set_unmap_cmd(unsigned char *cdb, struct ufshpb_region *rgn)
{
        cdb[0] = UFSHPB_WRITE_BUFFER;

        if (rgn) {
                cdb[1] = UFSHPB_WRITE_BUFFER_INACT_SINGLE_ID;
                put_unaligned_be16(rgn->rgn_idx, &cdb[2]);
        } else {
                cdb[1] = UFSHPB_WRITE_BUFFER_INACT_ALL_ID;
        }

        cdb[9] = 0x00;
}

Does it make sense?
Thanks,
Avri