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Change the peripheral driver list from a linker set to module driven

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driver registration.  This should allow things like da, sa, cd etc to be
in seperate KLD's to the cam core and make them preloadable.
This commit is contained in:
peter 2001-02-07 07:05:59 +00:00
parent be4ec0638c
commit b9f4600bb9
12 changed files with 65 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
sys/cam/cam_periph.c
View File

@ -63,6 +63,29 @@ static void camperiphdone(struct cam_periph *periph,
union ccb *done_ccb);
static void camperiphfree(struct cam_periph *periph);
static int nperiph_drivers;
struct periph_driver **periph_drivers;
void
periphdriver_register(void *data)
{
struct periph_driver **newdrivers, **old;
int ndrivers;
ndrivers = nperiph_drivers + 2;
newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_TEMP, M_WAITOK);
if (periph_drivers)
bcopy(periph_drivers, newdrivers,
sizeof(*newdrivers) * ndrivers);
newdrivers[nperiph_drivers] = (struct periph_driver *)data;
newdrivers[nperiph_drivers + 1] = NULL;
old = periph_drivers;
periph_drivers = newdrivers;
if (old)
free(old, M_TEMP);
nperiph_drivers++;
}
cam_status
cam_periph_alloc(periph_ctor_t *periph_ctor,
periph_oninv_t *periph_oninvalidate,
@ -112,8 +135,7 @@ cam_periph_alloc(periph_ctor_t *periph_ctor,
init_level++;
for (p_drv = (struct periph_driver **)periphdriver_set.ls_items;
*p_drv != NULL; p_drv++) {
for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
if (strcmp((*p_drv)->driver_name, name) == 0)
break;
}
@ -201,8 +223,7 @@ cam_periph_find(struct cam_path *path, char *name)
struct cam_periph *periph;
int s;
for (p_drv = (struct periph_driver **)periphdriver_set.ls_items;
*p_drv != NULL; p_drv++) {
for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0))
continue;
@ -401,8 +422,7 @@ camperiphfree(struct cam_periph *periph)
int s;
struct periph_driver **p_drv;
for (p_drv = (struct periph_driver **)periphdriver_set.ls_items;
*p_drv != NULL; p_drv++) {
for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0)
break;
}

25
sys/cam/cam_periph.h
View File

@ -37,7 +37,30 @@
extern struct cam_periph *xpt_periph;
extern struct linker_set periphdriver_set;
extern struct periph_driver **periph_drivers;
void periphdriver_register(void *);
#include <sys/module.h>
#define PERIPHDRIVER_DECLARE(name, driver) \
static int name ## _modevent(module_t mod, int type, void *data) \
{ \
switch (type) { \
case MOD_LOAD: \
periphdriver_register(data); \
break; \
case MOD_UNLOAD: \
printf(#name " module unload - not possible for this module type\n"); \
return EINVAL; \
} \
return 0; \
} \
static moduledata_t name ## _mod = { \
#name, \
name ## _modevent, \
(void *)&driver \
}; \
DECLARE_MODULE(name, name ## _mod, SI_SUB_DRIVERS, SI_ORDER_ANY); \
MODULE_DEPEND(name, cam, 1, 1, 1)
typedef void (periph_init_t)(void); /*
* Callback informing the peripheral driver

16
sys/cam/cam_xpt.c
View File

@ -576,8 +576,8 @@ static struct periph_driver probe_driver =
TAILQ_HEAD_INITIALIZER(probe_driver.units)
};
DATA_SET(periphdriver_set, xpt_driver);
DATA_SET(periphdriver_set, probe_driver);
PERIPHDRIVER_DECLARE(xpt, xpt_driver);
PERIPHDRIVER_DECLARE(probe, probe_driver);
#define XPT_CDEV_MAJOR 104
@ -1167,8 +1167,7 @@ xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
cur_generation = xsoftc.generation;
/* first find our driver in the list of drivers */
for (p_drv = (struct periph_driver **)periphdriver_set.ls_items;
*p_drv != NULL; p_drv++)
for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
if (strcmp((*p_drv)->driver_name, name) == 0)
break;
@ -2342,9 +2341,7 @@ xptplistperiphfunc(struct cam_periph *periph, void *arg)
* peripheral driver linker set entry would cost
* more in the long run than doing this quick lookup.
*/
for (pdrv =
(struct periph_driver **)periphdriver_set.ls_items;
*pdrv != NULL; pdrv++) {
for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
if (strcmp((*pdrv)->driver_name,
periph->periph_name) == 0)
break;
@ -2546,8 +2543,7 @@ xptpdrvtraverse(struct periph_driver **start_pdrv,
* change while the system is running), the list traversal should
* be modified to work like the other traversal functions.
*/
for (pdrv = (start_pdrv ? start_pdrv :
(struct periph_driver **)periphdriver_set.ls_items);
for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
*pdrv != NULL; pdrv++) {
retval = tr_func(pdrv, arg);
@ -6210,7 +6206,7 @@ xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
if (busses_to_config == 0) {
/* Register all the peripheral drivers */
/* XXX This will have to change when we have loadable modules */
p_drv = (struct periph_driver **)periphdriver_set.ls_items;
p_drv = periph_drivers;
for (i = 0; p_drv[i] != NULL; i++) {
(*p_drv[i]->init)();
}

2
sys/cam/scsi/scsi_cd.c
View File

@ -245,7 +245,7 @@ static struct periph_driver cddriver =
TAILQ_HEAD_INITIALIZER(cddriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, cddriver);
PERIPHDRIVER_DECLARE(cd, cddriver);
/* For 2.2-stable support */
#ifndef D_DISK

2
sys/cam/scsi/scsi_ch.c
View File

@ -209,7 +209,7 @@ static struct periph_driver chdriver =
TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, chdriver);
PERIPHDRIVER_DECLARE(ch, chdriver);
static struct cdevsw ch_cdevsw = {
/* open */ chopen,

2
sys/cam/scsi/scsi_da.c
View File

@ -299,7 +299,7 @@ static struct periph_driver dadriver =
TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, dadriver);
PERIPHDRIVER_DECLARE(da, dadriver);
#define DA_CDEV_MAJOR 13
#define DA_BDEV_MAJOR 4

2
sys/cam/scsi/scsi_pass.c
View File

@ -107,7 +107,7 @@ static struct periph_driver passdriver =
TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, passdriver);
PERIPHDRIVER_DECLARE(pass, passdriver);
static struct cdevsw pass_cdevsw = {
/* open */ passopen,

2
sys/cam/scsi/scsi_pt.c
View File

@ -114,7 +114,7 @@ static struct periph_driver ptdriver =
TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, ptdriver);
PERIPHDRIVER_DECLARE(pt, ptdriver);
#define PT_CDEV_MAJOR 61

2
sys/cam/scsi/scsi_sa.c
View File

@ -402,7 +402,7 @@ static struct periph_driver sadriver =
TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, sadriver);
PERIPHDRIVER_DECLARE(sa, sadriver);
/* For 2.2-stable support */
#ifndef D_TAPE

2
sys/cam/scsi/scsi_ses.c
View File

@ -173,7 +173,7 @@ static struct periph_driver sesdriver = {
TAILQ_HEAD_INITIALIZER(sesdriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, sesdriver);
PERIPHDRIVER_DECLARE(ses, sesdriver);
static struct cdevsw ses_cdevsw =
{

2
sys/cam/scsi/scsi_targ_bh.c
View File

@ -149,7 +149,7 @@ static struct periph_driver targbhdriver =
TAILQ_HEAD_INITIALIZER(targbhdriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, targbhdriver);
PERIPHDRIVER_DECLARE(targbh, targbhdriver);
static void
targbhinit(void)

2
sys/cam/scsi/scsi_target.c
View File

@ -228,7 +228,7 @@ static struct periph_driver targdriver =
TAILQ_HEAD_INITIALIZER(targdriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, targdriver);
PERIPHDRIVER_DECLARE(targ, targdriver);
static struct extend_array *targperiphs;
static dev_t targ_ctl_dev;