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| author | ken <ken@FreeBSD.org> | 2013-08-15 16:41:27 +0000 |
|---|---|---|
| committer | ken <ken@FreeBSD.org> | 2013-08-15 16:41:27 +0000 |
| commit | c6e2041529c9c69f395d4780ca05dbd3a9d186e5 (patch) | |
| tree | 25fde034484e9df6eea5a62f451885819ab6f1ac /sys/dev/isp | |
| parent | b45bc75e19b0d23a9d666a6755c6d5e7c85934bd (diff) | |
| download | FreeBSD-src-c6e2041529c9c69f395d4780ca05dbd3a9d186e5.zip FreeBSD-src-c6e2041529c9c69f395d4780ca05dbd3a9d186e5.tar.gz | |
Export the maxio field in the CAM XPT_PATH_INQ CCB in the isp(4)
driver.
This tells consumers up the stack the maximum I/O size that the
controller can handle.
The I/O size is bounded by the number of scatter/gather segments
the controller can handle and the page size. For an amd64 system,
it works out to around 5MB.
Reviewed by: mjacob
MFC after: 3 days
Sponsored by: Spectra Logic
Diffstat (limited to 'sys/dev/isp')
| -rw-r--r-- | sys/dev/isp/isp_freebsd.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/dev/isp/isp_freebsd.c b/sys/dev/isp/isp_freebsd.c index 167d39d..2d0d64d 100644 --- a/sys/dev/isp/isp_freebsd.c +++ b/sys/dev/isp/isp_freebsd.c @@ -5445,6 +5445,11 @@ isp_action(struct cam_sim *sim, union ccb *ccb) cpi->max_target = ISP_MAX_TARGETS(isp) - 1; cpi->max_lun = ISP_MAX_LUNS(isp) - 1; cpi->bus_id = cam_sim_bus(sim); + if (isp->isp_osinfo.sixtyfourbit) + cpi->maxio = (ISP_NSEG64_MAX - 1) * PAGE_SIZE; + else + cpi->maxio = (ISP_NSEG_MAX - 1) * PAGE_SIZE; + bus = cam_sim_bus(xpt_path_sim(cpi->ccb_h.path)); if (IS_FC(isp)) { fcparam *fcp = FCPARAM(isp, bus); |
