Author: kib
Date: Tue Mar 19 15:01:50 2013
New Revision: 248519
URL: http://svnweb.freebsd.org/changeset/base/248519
Log:
Support unmapped i/o for the md(4).
The vnode-backed md(4) has to map the unmapped bio because VOP_READ()
and VOP_WRITE() interfaces do not allow to pass unmapped requests to
the filesystem. Vnode-backed md(4) uses pbufs instead of relying on
the bio_transient_map, to avoid usual md deadlock.
Sponsored by: The FreeBSD Foundation
Tested by: pho, scottl
Modified:
head/sys/cam/ata/ata_da.c
head/sys/cam/cam_ccb.h
head/sys/cam/scsi/scsi_all.c
head/sys/cam/scsi/scsi_all.h
head/sys/cam/scsi/scsi_cd.c
head/sys/cam/scsi/scsi_da.c
Modified: head/sys/cam/ata/ata_da.c
==============================================================================
--- head/sys/cam/ata/ata_da.c Tue Mar 19 14:53:23 2013 (r248518)
+++ head/sys/cam/ata/ata_da.c Tue Mar 19 15:01:50 2013 (r248519)
@@ -1167,6 +1167,8 @@ adaregister(struct cam_periph *periph, v
((softc->flags & ADA_FLAG_CAN_CFA) &&
!(softc->flags & ADA_FLAG_CAN_48BIT)))
softc->disk->d_flags |= DISKFLAG_CANDELETE;
+ if ((cpi.hba_misc & PIM_UNMAPPED) != 0)
+ softc->disk->d_flags |= DISKFLAG_UNMAPPED_BIO;
strlcpy(softc->disk->d_descr, cgd->ident_data.model,
MIN(sizeof(softc->disk->d_descr), sizeof(cgd->ident_data.model)));
strlcpy(softc->disk->d_ident, cgd->ident_data.serial,
@@ -1431,13 +1433,19 @@ adastart(struct cam_periph *periph, unio
return;
}
#endif
+ KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 ||
+ round_page(bp->bio_bcount + bp->bio_ma_offset) /
+ PAGE_SIZE == bp->bio_ma_n,
+ ("Short bio %p", bp));
cam_fill_ataio(ataio,
ada_retry_count,
adadone,
- bp->bio_cmd == BIO_READ ?
- CAM_DIR_IN : CAM_DIR_OUT,
+ (bp->bio_cmd == BIO_READ ? CAM_DIR_IN :
+ CAM_DIR_OUT) | ((bp->bio_flags & BIO_UNMAPPED)
+ != 0 ? CAM_DATA_BIO : 0),
tag_code,
- bp->bio_data,
+ ((bp->bio_flags & BIO_UNMAPPED) != 0) ? (void *)bp :
+ bp->bio_data,
bp->bio_bcount,
ada_default_timeout*1000);
Modified: head/sys/cam/cam_ccb.h
==============================================================================
--- head/sys/cam/cam_ccb.h Tue Mar 19 14:53:23 2013 (r248518)
+++ head/sys/cam/cam_ccb.h Tue Mar 19 15:01:50 2013 (r248519)
@@ -42,7 +42,6 @@
#include <cam/scsi/scsi_all.h>
#include <cam/ata/ata_all.h>
-
/* General allocation length definitions for CCB structures */
#define IOCDBLEN CAM_MAX_CDBLEN /* Space for CDB bytes/pointer
*/
#define VUHBALEN 14 /* Vendor Unique HBA length */
@@ -572,7 +571,8 @@ typedef enum {
PIM_NOINITIATOR = 0x20, /* Initiator role not supported. */
PIM_NOBUSRESET = 0x10, /* User has disabled initial BUS RESET */
PIM_NO_6_BYTE = 0x08, /* Do not send 6-byte commands */
- PIM_SEQSCAN = 0x04 /* Do bus scans sequentially, not in parallel */
+ PIM_SEQSCAN = 0x04, /* Do bus scans sequentially, not in parallel */
+ PIM_UNMAPPED = 0x02,
} pi_miscflag;
/* Path Inquiry CCB */
Modified: head/sys/cam/scsi/scsi_all.c
==============================================================================
--- head/sys/cam/scsi/scsi_all.c Tue Mar 19 14:53:23 2013
(r248518)
+++ head/sys/cam/scsi/scsi_all.c Tue Mar 19 15:01:50 2013
(r248519)
@@ -5679,7 +5679,11 @@ scsi_read_write(struct ccb_scsiio *csio,
u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
u_int32_t timeout)
{
+ int read;
u_int8_t cdb_len;
+
+ read = (readop & SCSI_RW_DIRMASK) == SCSI_RW_READ;
+
/*
* Use the smallest possible command to perform the operation
* as some legacy hardware does not support the 10 byte commands.
@@ -5696,7 +5700,7 @@ scsi_read_write(struct ccb_scsiio *csio,
struct scsi_rw_6 *scsi_cmd;
scsi_cmd = (struct scsi_rw_6 *)&csio->cdb_io.cdb_bytes;
- scsi_cmd->opcode = readop ? READ_6 : WRITE_6;
+ scsi_cmd->opcode = read ? READ_6 : WRITE_6;
scsi_ulto3b(lba, scsi_cmd->addr);
scsi_cmd->length = block_count & 0xff;
scsi_cmd->control = 0;
@@ -5715,7 +5719,7 @@ scsi_read_write(struct ccb_scsiio *csio,
struct scsi_rw_10 *scsi_cmd;
scsi_cmd = (struct scsi_rw_10 *)&csio->cdb_io.cdb_bytes;
- scsi_cmd->opcode = readop ? READ_10 : WRITE_10;
+ scsi_cmd->opcode = read ? READ_10 : WRITE_10;
scsi_cmd->byte2 = byte2;
scsi_ulto4b(lba, scsi_cmd->addr);
scsi_cmd->reserved = 0;
@@ -5738,7 +5742,7 @@ scsi_read_write(struct ccb_scsiio *csio,
struct scsi_rw_12 *scsi_cmd;
scsi_cmd = (struct scsi_rw_12 *)&csio->cdb_io.cdb_bytes;
- scsi_cmd->opcode = readop ? READ_12 : WRITE_12;
+ scsi_cmd->opcode = read ? READ_12 : WRITE_12;
scsi_cmd->byte2 = byte2;
scsi_ulto4b(lba, scsi_cmd->addr);
scsi_cmd->reserved = 0;
@@ -5760,7 +5764,7 @@ scsi_read_write(struct ccb_scsiio *csio,
struct scsi_rw_16 *scsi_cmd;
scsi_cmd = (struct scsi_rw_16 *)&csio->cdb_io.cdb_bytes;
- scsi_cmd->opcode = readop ? READ_16 : WRITE_16;
+ scsi_cmd->opcode = read ? READ_16 : WRITE_16;
scsi_cmd->byte2 = byte2;
scsi_u64to8b(lba, scsi_cmd->addr);
scsi_cmd->reserved = 0;
@@ -5771,7 +5775,8 @@ scsi_read_write(struct ccb_scsiio *csio,
cam_fill_csio(csio,
retries,
cbfcnp,
- /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT,
+ (read ? CAM_DIR_IN : CAM_DIR_OUT) |
+ ((readop & SCSI_RW_BIO) != 0 ? CAM_DATA_BIO : 0),
tag_action,
data_ptr,
dxfer_len,
Modified: head/sys/cam/scsi/scsi_all.h
==============================================================================
--- head/sys/cam/scsi/scsi_all.h Tue Mar 19 14:53:23 2013
(r248518)
+++ head/sys/cam/scsi/scsi_all.h Tue Mar 19 15:01:50 2013
(r248519)
@@ -2354,6 +2354,10 @@ void scsi_write_buffer(struct ccb_scsiio
uint8_t *data_ptr, uint32_t param_list_length,
uint8_t sense_len, uint32_t timeout);
+#define SCSI_RW_READ 0x0001
+#define SCSI_RW_WRITE 0x0002
+#define SCSI_RW_DIRMASK 0x0003
+#define SCSI_RW_BIO 0x1000
void scsi_read_write(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int readop, u_int8_t byte2,
Modified: head/sys/cam/scsi/scsi_cd.c
==============================================================================
--- head/sys/cam/scsi/scsi_cd.c Tue Mar 19 14:53:23 2013 (r248518)
+++ head/sys/cam/scsi/scsi_cd.c Tue Mar 19 15:01:50 2013 (r248519)
@@ -1575,7 +1575,8 @@ cdstart(struct cam_periph *periph, union
/*retries*/ cd_retry_count,
/* cbfcnp */ cddone,
MSG_SIMPLE_Q_TAG,
- /* read */bp->bio_cmd == BIO_READ,
+ /* read */bp->bio_cmd == BIO_READ ?
+ SCSI_RW_READ : SCSI_RW_WRITE,
/* byte2 */ 0,
/* minimum_cmd_size */ 10,
/* lba */ bp->bio_offset /
Modified: head/sys/cam/scsi/scsi_da.c
==============================================================================
--- head/sys/cam/scsi/scsi_da.c Tue Mar 19 14:53:23 2013 (r248518)
+++ head/sys/cam/scsi/scsi_da.c Tue Mar 19 15:01:50 2013 (r248519)
@@ -1184,7 +1184,7 @@ dadump(void *arg, void *virtual, vm_offs
/*retries*/0,
dadone,
MSG_ORDERED_Q_TAG,
- /*read*/FALSE,
+ /*read*/SCSI_RW_WRITE,
/*byte2*/0,
/*minimum_cmd_size*/ softc->minimum_cmd_size,
offset / secsize,
@@ -1757,6 +1757,8 @@ daregister(struct cam_periph *periph, vo
softc->disk->d_flags = 0;
if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0)
softc->disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
+ if ((cpi.hba_misc & PIM_UNMAPPED) != 0)
+ softc->disk->d_flags |= DISKFLAG_UNMAPPED_BIO;
cam_strvis(softc->disk->d_descr, cgd->inq_data.vendor,
sizeof(cgd->inq_data.vendor), sizeof(softc->disk->d_descr));
strlcat(softc->disk->d_descr, " ", sizeof(softc->disk->d_descr));
@@ -1985,14 +1987,18 @@ dastart(struct cam_periph *periph, union
/*retries*/da_retry_count,
/*cbfcnp*/dadone,
/*tag_action*/tag_code,
- /*read_op*/bp->bio_cmd
- == BIO_READ,
+ /*read_op*/(bp->bio_cmd == BIO_READ ?
+ SCSI_RW_READ : SCSI_RW_WRITE) |
+ ((bp->bio_flags & BIO_UNMAPPED) != 0 ?
+ SCSI_RW_BIO : 0),
/*byte2*/0,
softc->minimum_cmd_size,
/*lba*/bp->bio_pblkno,
/*block_count*/bp->bio_bcount /
softc->params.secsize,
- /*data_ptr*/ bp->bio_data,
+ /*data_ptr*/ (bp->bio_flags &
+ BIO_UNMAPPED) != 0 ? (void *)bp :
+ bp->bio_data,
/*dxfer_len*/ bp->bio_bcount,
/*sense_len*/SSD_FULL_SIZE,
da_default_timeout * 1000);
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