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Modify the "legacy bus" to pass all resource allocations through to its

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parent rather than track resources locally.  The original code
was incomplete in that it would only honor requests for resources
that already exist in its resource list.  This prevented many ISA
identify routines from allocating temporary resources.  Passing
the requests up to legacy's parent losing no functionality and
allows these requests to succeed.

Reviewed by: imp, jhb
Approved by: RE
This commit is contained in:
Justin T. Gibbs 2004-08-16 21:55:29 +00:00
parent ff20f7a95e
commit 6ec309a62f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=133886
1 changed files with 2 additions and 92 deletions
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94
sys/i386/i386/legacy.c
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@ -56,7 +56,6 @@ __FBSDID("$FreeBSD$");
static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
struct legacy_device {
struct resource_list lg_resources;
int lg_pcibus;
};
@ -68,15 +67,8 @@ static int legacy_attach(device_t);
static int legacy_print_child(device_t, device_t);
static device_t legacy_add_child(device_t bus, int order, const char *name,
int unit);
static struct resource *legacy_alloc_resource(device_t, device_t, int, int *,
u_long, u_long, u_long, u_int);
static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
static int legacy_release_resource(device_t, device_t, int, int,
struct resource *);
static int legacy_set_resource(device_t, device_t, int, int, u_long, u_long);
static int legacy_get_resource(device_t, device_t, int, int, u_long *, u_long *);
static void legacy_delete_resource(device_t, device_t, int, int);
static device_method_t legacy_methods[] = {
/* Device interface */
@ -93,11 +85,8 @@ static device_method_t legacy_methods[] = {
DEVMETHOD(bus_add_child, legacy_add_child),
DEVMETHOD(bus_read_ivar, legacy_read_ivar),
DEVMETHOD(bus_write_ivar, legacy_write_ivar),
DEVMETHOD(bus_set_resource, legacy_set_resource),
DEVMETHOD(bus_get_resource, legacy_get_resource),
DEVMETHOD(bus_alloc_resource, legacy_alloc_resource),
DEVMETHOD(bus_release_resource, legacy_release_resource),
DEVMETHOD(bus_delete_resource, legacy_delete_resource),
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
@ -201,23 +190,6 @@ legacy_attach(device_t dev)
return 0;
}
static int
legacy_print_all_resources(device_t dev)
{
struct legacy_device *atdev = DEVTOAT(dev);
struct resource_list *rl = &atdev->lg_resources;
int retval = 0;
if (SLIST_FIRST(rl) || atdev->lg_pcibus != -1)
retval += printf(" at");
retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
return retval;
}
static int
legacy_print_child(device_t bus, device_t child)
{
@ -225,7 +197,6 @@ legacy_print_child(device_t bus, device_t child)
int retval = 0;
retval += bus_print_child_header(bus, child);
retval += legacy_print_all_resources(child);
if (atdev->lg_pcibus != -1)
retval += printf(" pcibus %d", atdev->lg_pcibus);
retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
@ -243,7 +214,6 @@ legacy_add_child(device_t bus, int order, const char *name, int unit)
M_NOWAIT | M_ZERO);
if (atdev == NULL)
return(NULL);
resource_list_init(&atdev->lg_resources);
atdev->lg_pcibus = -1;
child = device_add_child_ordered(bus, order, name, unit);
@ -287,66 +257,6 @@ legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
return 0;
}
static struct resource *
legacy_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct legacy_device *atdev = DEVTOAT(child);
struct resource_list *rl = &atdev->lg_resources;
return (resource_list_alloc(rl, bus, child, type, rid, start, end,
count, flags));
}
static int
legacy_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
struct legacy_device *atdev = DEVTOAT(child);
struct resource_list *rl = &atdev->lg_resources;
return (resource_list_release(rl, bus, child, type, rid, r));
}
static int
legacy_set_resource(device_t dev, device_t child, int type, int rid,
u_long start, u_long count)
{
struct legacy_device *atdev = DEVTOAT(child);
struct resource_list *rl = &atdev->lg_resources;
resource_list_add(rl, type, rid, start, start + count - 1, count);
return(0);
}
static int
legacy_get_resource(device_t dev, device_t child, int type, int rid,
u_long *startp, u_long *countp)
{
struct legacy_device *atdev = DEVTOAT(child);
struct resource_list *rl = &atdev->lg_resources;
struct resource_list_entry *rle;
rle = resource_list_find(rl, type, rid);
if (!rle)
return(ENOENT);
if (startp)
*startp = rle->start;
if (countp)
*countp = rle->count;
return(0);
}
static void
legacy_delete_resource(device_t dev, device_t child, int type, int rid)
{
struct legacy_device *atdev = DEVTOAT(child);
struct resource_list *rl = &atdev->lg_resources;
resource_list_delete(rl, type, rid);
}
/*
* Legacy CPU attachment when ACPI is not available. Drivers like
* cpufreq(4) hang off this.