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rman: Add rman_get/set_type

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This permits associating a resource type (e.g. SYS_RES_MEMORY) with a
struct resource.

I considered adding a new field to struct rman to store the type and
only providing rman_get_type as an accessor.  However, changing
'struct rman' is an ABI breakage.  I might revisit this in main, but
the current approach is MFC'able.

Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D44122
This commit is contained in:
John Baldwin 2024-03-13 15:05:53 -07:00
parent 85df11a1de
commit b30a80b655
4 changed files with 33 additions and 2 deletions
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2
share/man/man9/Makefile
View file

@ -1869,6 +1869,7 @@ MLINKS+=rman.9 rman_activate_resource.9 \
rman.9 rman_get_rid.9 \
rman.9 rman_get_size.9 \
rman.9 rman_get_start.9 \
rman.9 rman_get_type.9 \
rman.9 rman_get_virtual.9 \
rman.9 rman_init.9 \
rman.9 rman_init_from_resource.9 \
@ -1883,6 +1884,7 @@ MLINKS+=rman.9 rman_activate_resource.9 \
rman.9 rman_set_bustag.9 \
rman.9 rman_set_mapping.9 \
rman.9 rman_set_rid.9 \
rman.9 rman_set_type.9 \
rman.9 rman_set_virtual.9
MLINKS+=rmlock.9 rm_assert.9 \
rmlock.9 rm_destroy.9 \

18
share/man/man9/rman.9
View file

@ -23,7 +23,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd May 20, 2016
.Dd March 13, 2024
.Dt RMAN 9
.Os
.Sh NAME
@ -56,7 +56,9 @@
.Nm rman_set_bushandle ,
.Nm rman_get_bushandle ,
.Nm rman_set_rid ,
.Nm rman_get_rid
.Nm rman_get_rid ,
.Nm rman_set_type ,
.Nm rman_get_type
.Nd resource management functions
.Sh SYNOPSIS
.In sys/types.h
@ -125,6 +127,10 @@
.Fn rman_set_rid "struct resource *r" "int rid"
.Ft int
.Fn rman_get_rid "struct resource *r"
.Ft void
.Fn rman_set_type "struct resource *r" "int type"
.Ft int
.Fn rman_get_type "struct resource *r"
.Sh DESCRIPTION
The
.Nm
@ -457,6 +463,14 @@ The
function retrieves this RID.
.Pp
The
.Fn rman_set_type
function associates a resource type with a resource
.Fa r .
The
.Fn rman_get_type
function retrieves this type.
.Pp
The
.Fn rman_get_device
function returns a pointer to the device which reserved the resource
.Fa r .

13
sys/kern/subr_rman.c
View file

@ -91,6 +91,7 @@ struct resource_i {
device_t r_dev; /* device which has allocated this resource */
struct rman *r_rm; /* resource manager from whence this came */
int r_rid; /* optional rid for this resource. */
int r_type; /* optional type for this resource. */
};
static int rman_debug = 0;
@ -927,6 +928,18 @@ rman_get_rid(struct resource *r)
return (r->__r_i->r_rid);
}
void
rman_set_type(struct resource *r, int type)
{
r->__r_i->r_type = type;
}
int
rman_get_type(struct resource *r)
{
return (r->__r_i->r_type);
}
void
rman_set_device(struct resource *r, device_t dev)
{

2
sys/sys/rman.h
View file

@ -134,6 +134,7 @@ void rman_get_mapping(struct resource *, struct resource_map *);
int rman_get_rid(struct resource *);
rman_res_t rman_get_size(struct resource *);
rman_res_t rman_get_start(struct resource *);
int rman_get_type(struct resource *);
void *rman_get_virtual(struct resource *);
int rman_deactivate_resource(struct resource *r);
int rman_fini(struct rman *rm);
@ -156,6 +157,7 @@ void rman_set_device(struct resource *_r, device_t _dev);
void rman_set_irq_cookie(struct resource *_r, void *_c);
void rman_set_mapping(struct resource *, struct resource_map *);
void rman_set_rid(struct resource *_r, int _rid);
void rman_set_type(struct resource *_r, int _type);
void rman_set_virtual(struct resource *_r, void *_v);
extern struct rman_head rman_head;