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Add automatic rescan on connect. This happens already if the drive is

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connected during boot and the vpo module is in the kernel/loaded.

In the case where the module is loaded at some later stage with kldload,
the CAM bus is now rescanned as well.
This commit is contained in:
Nick Hibma 2000-04-04 22:15:13 +00:00
parent e36bc62387
commit 9011b59b70
1 changed files with 37 additions and 9 deletions
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46
sys/dev/ppbus/vpo.c
View file

@ -30,6 +30,8 @@
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/devicestat.h> /* for struct devstat */
#include <machine/clock.h>
@ -38,6 +40,7 @@
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/cam_periph.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
@ -68,7 +71,6 @@ struct vpo_data {
int vpo_isplus;
struct cam_sim *sim;
struct cam_path *path;
struct vpo_sense vpo_sense;
@ -81,6 +83,9 @@ struct vpo_data {
/* cam related functions */
static void vpo_action(struct cam_sim *sim, union ccb *ccb);
static void vpo_poll(struct cam_sim *sim);
static void vpo_cam_rescan_callback(struct cam_periph *periph,
union ccb *ccb);
static void vpo_cam_rescan(struct vpo_data *vpo);
static void
vpo_identify(driver_t *driver, device_t parent)
@ -165,19 +170,42 @@ vpo_attach(device_t dev)
return (ENXIO);
}
if (xpt_create_path(&vpo->path, /*periph*/NULL,
cam_sim_path(vpo->sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(vpo->sim));
cam_sim_free(vpo->sim, /*free_devq*/TRUE);
return (ENXIO);
}
/* all went ok */
vpo_cam_rescan(vpo); /* have CAM rescan the bus */
return (0);
}
static void
vpo_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
{
free(ccb, M_TEMP);
}
static void
vpo_cam_rescan(struct vpo_data *vpo)
{
struct cam_path *path;
union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK);
bzero(ccb, sizeof(union ccb));
if (xpt_create_path(&path, xpt_periph, cam_sim_path(vpo->sim), 0, 0)
!= CAM_REQ_CMP) {
/* A failure is benign as the user can do a manual rescan */
return;
}
xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
ccb->ccb_h.func_code = XPT_SCAN_BUS;
ccb->ccb_h.cbfcnp = vpo_cam_rescan_callback;
ccb->crcn.flags = CAM_FLAG_NONE;
xpt_action(ccb);
/* The scan is in progress now. */
}
/*
* vpo_intr()
*/