| Message ID | 20230920191442.3701673-7-bvanassche@acm.org |
|---|---|
| State | New |
| Headers | show |
| Series | Pass data temperature information to zoned UFS devices | expand |
> Prepare for adding code that will fill in and parse this data structure. > > Cc: Martin K. Petersen <martin.petersen@oracle.com> > Signed-off-by: Bart Van Assche <bvanassche@acm.org> > --- > include/scsi/scsi_proto.h | 40 > +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 40 insertions(+) > > diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h > index 07d65c1f59db..4e3691cb67da 100644 > --- a/include/scsi/scsi_proto.h > +++ b/include/scsi/scsi_proto.h > @@ -10,6 +10,7 @@ > #ifndef _SCSI_PROTO_H_ > #define _SCSI_PROTO_H_ > > +#include <linux/build_bug.h> > #include <linux/types.h> > > /* > @@ -275,6 +276,45 @@ struct scsi_lun { > __u8 scsi_lun[8]; > }; > > +/* SBC-5 IO advice hints group descriptor */ > +struct scsi_io_group_descriptor { > +#if defined(__BIG_ENDIAN) > + u8 io_advice_hints_mode: 2; > + u8 reserved1: 3; > + u8 st_enble: 1; > + u8 cs_enble: 1; > + u8 ic_enable: 1; > +#elif defined(__LITTLE_ENDIAN) > + u8 ic_enable: 1; > + u8 cs_enble: 1; > + u8 st_enble: 1; > + u8 reserved1: 3; > + u8 io_advice_hints_mode: 2; > +#else > +#error > +#endif Anything pass byte offset 0 is irrelevant for constrained streams. Why do we need that further drill down of the descriptor structure? Thanks, Avri > + u8 reserved2[3]; > + /* Logical block markup descriptor */ > +#if defined(__BIG_ENDIAN) > + u8 acdlu: 1; > + u8 reserved3: 1; > + u8 rlbsr: 2; > + u8 lbm_descriptor_type: 4; > +#elif defined(__LITTLE_ENDIAN) > + u8 lbm_descriptor_type: 4; > + u8 rlbsr: 2; > + u8 reserved3: 1; > + u8 acdlu: 1; > +#else > +#error > +#endif > + u8 params[2]; > + u8 reserved4; > + u8 reserved5[8]; > +}; > + > +static_assert(sizeof(struct scsi_io_group_descriptor) == 16); > + > /* SPC asymmetric access states */ > #define SCSI_ACCESS_STATE_OPTIMAL 0x00 > #define SCSI_ACCESS_STATE_ACTIVE 0x01
On 10/2/23 04:41, Avri Altman wrote: >> +/* SBC-5 IO advice hints group descriptor */ >> +struct scsi_io_group_descriptor { >> +#if defined(__BIG_ENDIAN) >> + u8 io_advice_hints_mode: 2; >> + u8 reserved1: 3; >> + u8 st_enble: 1; >> + u8 cs_enble: 1; >> + u8 ic_enable: 1; >> +#elif defined(__LITTLE_ENDIAN) >> + u8 ic_enable: 1; >> + u8 cs_enble: 1; >> + u8 st_enble: 1; >> + u8 reserved1: 3; >> + u8 io_advice_hints_mode: 2; >> +#else >> +#error >> +#endif > > Anything pass byte offset 0 is irrelevant for constrained streams. > Why do we need that further drill down of the descriptor structure? The data structures in header file include/scsi/scsi_proto.h follow the SCSI standards closely. These data structures should not be tailored to the current use case of these data structures. Thanks, Bart.
> Prepare for adding code that will fill in and parse this data structure. > > Cc: Martin K. Petersen <martin.petersen@oracle.com> > Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Avri Altman <avri.altman@wdc.com>
> Prepare for adding code that will fill in and parse this data structure. > > Cc: Martin K. Petersen <martin.petersen@oracle.com> > Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Daejun Park <daejun7.park@samsung.com>
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h index 07d65c1f59db..4e3691cb67da 100644 --- a/include/scsi/scsi_proto.h +++ b/include/scsi/scsi_proto.h @@ -10,6 +10,7 @@ #ifndef _SCSI_PROTO_H_ #define _SCSI_PROTO_H_ +#include <linux/build_bug.h> #include <linux/types.h> /* @@ -275,6 +276,45 @@ struct scsi_lun { __u8 scsi_lun[8]; }; +/* SBC-5 IO advice hints group descriptor */ +struct scsi_io_group_descriptor { +#if defined(__BIG_ENDIAN) + u8 io_advice_hints_mode: 2; + u8 reserved1: 3; + u8 st_enble: 1; + u8 cs_enble: 1; + u8 ic_enable: 1; +#elif defined(__LITTLE_ENDIAN) + u8 ic_enable: 1; + u8 cs_enble: 1; + u8 st_enble: 1; + u8 reserved1: 3; + u8 io_advice_hints_mode: 2; +#else +#error +#endif + u8 reserved2[3]; + /* Logical block markup descriptor */ +#if defined(__BIG_ENDIAN) + u8 acdlu: 1; + u8 reserved3: 1; + u8 rlbsr: 2; + u8 lbm_descriptor_type: 4; +#elif defined(__LITTLE_ENDIAN) + u8 lbm_descriptor_type: 4; + u8 rlbsr: 2; + u8 reserved3: 1; + u8 acdlu: 1; +#else +#error +#endif + u8 params[2]; + u8 reserved4; + u8 reserved5[8]; +}; + +static_assert(sizeof(struct scsi_io_group_descriptor) == 16); + /* SPC asymmetric access states */ #define SCSI_ACCESS_STATE_OPTIMAL 0x00 #define SCSI_ACCESS_STATE_ACTIVE 0x01
Prepare for adding code that will fill in and parse this data structure. Cc: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> --- include/scsi/scsi_proto.h | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)