> Measurements for one particular UFS controller + UFS device show a 25% > higher read bandwidth if the maximum data buffer size is increased from > 512 KiB to 1 MiB. Hence increase the maximum size of the data buffer > associated with a single request from SCSI_DEFAULT_MAX_SECTORS (1024) > * 512 bytes = 512 KiB to 1 MiB. > > Notes: > - The maximum data buffer size supported by the UFSHCI specification > is 65535 * 256 KiB or about 16 GiB. > - The maximum data buffer size for READ(10) commands is 65535 logical > blocks. To transfer more than 65535 * 4096 bytes = 255 MiB with a > single SCSI command, the READ(16) command is required. Support for > READ(16) is optional in the UFS 3.1 and UFS 4.0 standards. > > Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> > Cc: Avri Altman <avri.altman@xxxxxxx> > Cc: Bean Huo <beanhuo@xxxxxxxxxx> > Cc: Stanley Chu <stanley.chu@xxxxxxxxxxxx> > Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx> Acked-by: Avri Altman <avri.altman@xxxxxxx> Tested-by: Avri Altman <avri.altman@xxxxxxx>
