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ciss: Add sysctl/tunable hw.ciss and hw.ciss.base_transfer_speed

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Add a sysctl/tuneable to report a different base transfer speed than the
default of 132*1024.

PR: 246279
Reviewed by: imp
Tested by: Marek Zarychta
Differential Revision: https://reviews.freebsd.org/D25155
This commit is contained in:
Peter Eriksson 2024-10-13 22:01:33 -06:00 committed by Warner Losh
parent cafc839393
commit 74575d1428
1 changed files with 11 additions and 1 deletions
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12
sys/dev/ciss/ciss.c
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@ -242,6 +242,16 @@ static struct cdevsw ciss_cdevsw = {
.d_name = "ciss",
};
SYSCTL_NODE(_hw, OID_AUTO, ciss, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "CISS sysctl tunables");
/*
* This tunable can be used to force a specific value for transfer speed.
*/
static int ciss_base_transfer_speed = 132 * 1024;
SYSCTL_INT(_hw_ciss, OID_AUTO, base_transfer_speed, CTLFLAG_RDTUN,
&ciss_base_transfer_speed, 0,
"force a specific base transfer_speed");
/*
* This tunable can be set at boot time and controls whether physical devices
* that are marked hidden by the firmware should be exposed anyways.
@ -3029,7 +3039,7 @@ ciss_cam_action(struct cam_sim *sim, union ccb *ccb)
strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 132 * 1024; /* XXX what to set this to? */
cpi->base_transfer_speed = ciss_base_transfer_speed;
cpi->transport = XPORT_SPI;
cpi->transport_version = 2;
cpi->protocol = PROTO_SCSI;