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| author | Alexander Motin <mav@FreeBSD.org> | 2021-04-16 19:39:01 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2021-04-23 01:05:42 +0000 |
| commit | 6514cb18d94e9ab46406b7077d207c8b1a551e6e (patch) | |
| tree | 5d2822d1eaac8be3bb8d8f92378f1b571fe125f9 | |
| parent | 4bc708e1e87b493551fc286e25477490b1a75b99 (diff) | |
| download | src-6514cb18d94e9ab46406b7077d207c8b1a551e6e.tar.gz src-6514cb18d94e9ab46406b7077d207c8b1a551e6e.zip | |
pms(4): Limit maximum I/O size to 256KB instead of 1MB.
There is a weird limit of AGTIAPI_MAX_DMA_SEGS (128) S/G segments per
I/O since the initial driver import. I don't know why it was added,
can only guess some hardware limitation, but in worst case it means
maximum I/O size of 508KB. Respect it to be safe, rounding to 256KB.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
(cherry picked from commit 3e347834200b5d91a33384e696793e4ac20a44d4)
| -rw-r--r-- | sys/dev/pms/freebsd/driver/ini/src/agdef.h | 2 | ||||
| -rw-r--r-- | sys/dev/pms/freebsd/driver/ini/src/agtiapi.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/sys/dev/pms/freebsd/driver/ini/src/agdef.h b/sys/dev/pms/freebsd/driver/ini/src/agdef.h index 4c2ba2867f5f..b58741a434c7 100644 --- a/sys/dev/pms/freebsd/driver/ini/src/agdef.h +++ b/sys/dev/pms/freebsd/driver/ini/src/agdef.h @@ -62,7 +62,7 @@ EW 09-17-2004 1.0.0 Constant definitions #define AGTIAPI_MAX_DEVICE_7H 256 /*Max devices per channel in 7H */ #define AGTIAPI_MAX_DEVICE_8H 512 /*Max devices per channel in 8H*/ #define AGTIAPI_MAX_CAM_Q_DEPTH 1024 -#define AGTIAPI_NSEGS (btoc(maxphys) + 1) +#define AGTIAPI_NSEGS (MIN(btoc(maxphys), 64) + 1) /* ** Adapter specific defines */ diff --git a/sys/dev/pms/freebsd/driver/ini/src/agtiapi.c b/sys/dev/pms/freebsd/driver/ini/src/agtiapi.c index 4ce32d0ce6c0..a2b20c9e9264 100644 --- a/sys/dev/pms/freebsd/driver/ini/src/agtiapi.c +++ b/sys/dev/pms/freebsd/driver/ini/src/agtiapi.c @@ -1834,7 +1834,7 @@ static void agtiapi_cam_action( struct cam_sim *sim, union ccb * ccb ) cpi->max_target = maxTargets - 1; cpi->max_lun = AGTIAPI_MAX_LUN; /* Max supported I/O size, in bytes. */ - cpi->maxio = ulmin(1024 * 1024, maxphys); + cpi->maxio = ctob(AGTIAPI_NSEGS - 1); cpi->initiator_id = 255; strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); strlcpy(cpi->hba_vid, "PMC", HBA_IDLEN); |