* Add CDRIOC{READ,WRITE}SPEED ioctls to cd(4). Units are in KB/sec.

* Change atapi-cd ioctls to use the same units.
* Change burncd, cdcontrol to convert CDROM speed to KB/sec before
calling the ioctl.  Add a "max" speed option for their command lines.

This change does not break ABI but does change the units passed through
the ioctl so 3rd party software that uses cdrio.h will have to convert
(most likely by multiplying CDROM speed by 177 to get KB/s).

PR:		kern/36845
Submitted by:	Philipp Mergenthaler <p@i609a.hadiko.de> (CAM ioctls)
Reviewed by:	sos, ken
MFC after:	1 month

2 files changed, 58 insertions, 0 deletions

diff --git a/sys/cam/scsi/scsi_cd.c b/sys/cam/scsi/scsi_cd.c
index a7af9ba..3984f77 100644
--- a/sys/cam/scsi/scsi_cd.c
+++ b/sys/cam/scsi/scsi_cd.c
@@ -56,6 +56,7 @@
 #include <sys/disk.h>
 #include <sys/malloc.h>
 #include <sys/cdio.h>
+#include <sys/cdrio.h>
 #include <sys/dvdio.h>
 #include <sys/devicestat.h>
 #include <sys/sysctl.h>
@@ -230,6 +231,8 @@ static	int		cdplaytracks(struct cam_periph *periph,
 static	int		cdpause(struct cam_periph *periph, u_int32_t go);
 static	int		cdstopunit(struct cam_periph *periph, u_int32_t eject);
 static	int		cdstartunit(struct cam_periph *periph);
+static	int		cdsetspeed(struct cam_periph *periph,
+				   u_int32_t rdspeed, u_int32_t wrspeed);
 static	int		cdreportkey(struct cam_periph *periph,
 				    struct dvd_authinfo *authinfo);
 static	int		cdsendkey(struct cam_periph *periph,
@@ -2379,6 +2382,12 @@ cdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 		/* return (cd_reset(periph)); */
 		error = ENOTTY;
 		break;
+	case CDRIOCREADSPEED:
+		error = cdsetspeed(periph, *(u_int32_t *)addr, CDR_MAX_SPEED);
+		break;
+	case CDRIOCWRITESPEED:
+		error = cdsetspeed(periph, CDR_MAX_SPEED, *(u_int32_t *)addr);
+		break;
 	case DVDIOCSENDKEY:
 	case DVDIOCREPORTKEY: {
 		struct dvd_authinfo *authinfo;
@@ -2956,6 +2965,44 @@ cdstopunit(struct cam_periph *periph, u_int32_t eject)
 }
 
 static int
+cdsetspeed(struct cam_periph *periph, u_int32_t rdspeed, u_int32_t wrspeed)
+{
+	struct scsi_set_speed *scsi_cmd;
+	struct ccb_scsiio *csio;
+	union ccb *ccb;
+	int error;
+
+	error = 0;
+	ccb = cdgetccb(periph, /* priority */ 1);
+	csio = &ccb->csio;
+
+	cam_fill_csio(csio,
+		      /* retries */ 1,
+		      /* cbfcnp */ cddone,
+		      /* flags */ CAM_DIR_NONE,
+		      /* tag_action */ MSG_SIMPLE_Q_TAG,
+		      /* data_ptr */ NULL,
+		      /* dxfer_len */ 0,
+		      /* sense_len */ SSD_FULL_SIZE,
+		      sizeof(struct scsi_set_speed),
+ 		      /* timeout */ 50000);
+
+	scsi_cmd = (struct scsi_set_speed *)&csio->cdb_io.cdb_bytes;
+	bzero(scsi_cmd, sizeof(*scsi_cmd));
+
+	scsi_cmd->opcode = SET_CD_SPEED;
+	scsi_ulto2b(rdspeed, scsi_cmd->readspeed);
+	scsi_ulto2b(wrspeed, scsi_cmd->writespeed);
+
+	error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
+			 /*sense_flags*/SF_RETRY_UA);
+
+	xpt_release_ccb(ccb);
+
+	return(error);
+}
+
+static int
 cdreportkey(struct cam_periph *periph, struct dvd_authinfo *authinfo)
 {
 	union ccb *ccb;
diff --git a/sys/cam/scsi/scsi_cd.h b/sys/cam/scsi/scsi_cd.h
index fc52119..f242139 100644
--- a/sys/cam/scsi/scsi_cd.h
+++ b/sys/cam/scsi/scsi_cd.h
@@ -169,6 +169,16 @@ struct scsi_read_cd_capacity
 	u_int8_t control;
 };
 
+struct scsi_set_speed
+{
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t readspeed[2];
+	u_int8_t writespeed[2];
+	u_int8_t reserved[5];
+	u_int8_t control;
+};
+
 struct scsi_report_key 
 {
 	u_int8_t opcode;
@@ -251,6 +261,7 @@ struct scsi_read_dvd_structure
 #define PLAY_12			0xa5	/* cdrom pause in 'play audio' mode */
 #define PLAY_TRACK_REL_BIG	0xa9	/* cdrom play track/index mode */
 #define READ_DVD_STRUCTURE	0xad	/* read dvd structure */
+#define SET_CD_SPEED		0xbb	/* set c/dvd speed */
 
 struct scsi_report_key_data_header
 {