Page MenuHomeFreeBSD
Differential D7495 Diff 19368 head/sys/dev/bhnd/bhndb/bhndb_private.h

Changeset View

Standalone View

View Options

head/sys/dev/bhnd/bhndb/bhndb_private.h

Show All 27 Lines
* *
* $FreeBSD$ * $FreeBSD$
*/ */
#ifndef _BHND_BHNDB_PRIVATE_H_ #ifndef _BHND_BHNDB_PRIVATE_H_
#define _BHND_BHNDB_PRIVATE_H_ #define _BHND_BHNDB_PRIVATE_H_
#include <sys/param.h> #include <sys/param.h>
#include <sys/bitstring.h>
#include <sys/bus.h> #include <sys/bus.h>
#include <sys/systm.h> #include <sys/systm.h>
#include <machine/bus.h> #include <machine/bus.h>
#include <sys/rman.h> #include <sys/rman.h>
#include <machine/resource.h> #include <machine/resource.h>
#include "bhndbvar.h" #include "bhndbvar.h"
▲ Show 20 Lines • Show All 135 Lines • ▼ Show 20 Linesstruct bhndb_resources {
struct rman ht_mem_rman; /**< host memory manager */ struct rman ht_mem_rman; /**< host memory manager */
struct rman br_mem_rman; /**< bridged memory manager */ struct rman br_mem_rman; /**< bridged memory manager */
STAILQ_HEAD(, bhndb_region) bus_regions; /**< bus region descriptors */ STAILQ_HEAD(, bhndb_region) bus_regions; /**< bus region descriptors */
struct bhndb_dw_alloc *dw_alloc; /**< dynamic window allocation records */ struct bhndb_dw_alloc *dw_alloc; /**< dynamic window allocation records */
size_t dwa_count; /**< number of dynamic windows available. */ size_t dwa_count; /**< number of dynamic windows available. */
uint32_t dwa_freelist; /**< dynamic window free list */ bitstr_t *dwa_freelist; /**< dynamic window free list */
bhndb_priority_t min_prio; /**< minimum resource priority required to bhndb_priority_t min_prio; /**< minimum resource priority required to
allocate a dynamic window */ allocate a dynamic window */
}; };
/** /**
* Returns true if the all dynamic windows have been exhausted, false * Returns true if the all dynamic windows are marked free, false
* otherwise. * otherwise.
* *
* @param br The resource state to check. * @param br The resource state to check.
*/ */
static inline bool static inline bool
bhndb_dw_exhausted(struct bhndb_resources *br) bhndb_dw_all_free(struct bhndb_resources *br)
{ {
return (br->dwa_freelist == 0); int bit;
bit_ffs(br->dwa_freelist, br->dwa_count, &bit);
return (bit == -1);
} }
/** /**
* Find the next free dynamic window region in @p br. * Find the next free dynamic window region in @p br.
* *
* @param br The resource state to search. * @param br The resource state to search.
*/ */
static inline struct bhndb_dw_alloc * static inline struct bhndb_dw_alloc *
bhndb_dw_next_free(struct bhndb_resources *br) bhndb_dw_next_free(struct bhndb_resources *br)
{ {
struct bhndb_dw_alloc *dw_free; struct bhndb_dw_alloc *dw_free;
int bit;
if (bhndb_dw_exhausted(br)) bit_ffc(br->dwa_freelist, br->dwa_count, &bit);
if (bit == -1)
return (NULL); return (NULL);
dw_free = &br->dw_alloc[__builtin_ctz(br->dwa_freelist)]; dw_free = &br->dw_alloc[bit];
KASSERT(LIST_EMPTY(&dw_free->refs), KASSERT(LIST_EMPTY(&dw_free->refs),
("free list out of sync with refs")); ("free list out of sync with refs"));
return (dw_free); return (dw_free);
} }
/** /**
* Returns true if a dynamic window allocation is marked as free. * Returns true if a dynamic window allocation is marked as free.
* *
* @param br The resource state owning @p dwa. * @param br The resource state owning @p dwa.
* @param dwa The dynamic window allocation record to be checked. * @param dwa The dynamic window allocation record to be checked.
*/ */
static inline bool static inline bool
bhndb_dw_is_free(struct bhndb_resources *br, struct bhndb_dw_alloc *dwa) bhndb_dw_is_free(struct bhndb_resources *br, struct bhndb_dw_alloc *dwa)
{ {
bool is_free = LIST_EMPTY(&dwa->refs); bool is_free = LIST_EMPTY(&dwa->refs);
KASSERT(is_free == ((br->dwa_freelist & (1 << dwa->rnid)) != 0), KASSERT(is_free == !bit_test(br->dwa_freelist, dwa->rnid),
("refs out of sync with free list")); ("refs out of sync with free list"));
return (is_free); return (is_free);
} }
#define BHNDB_LOCK_INIT(sc) \ #define BHNDB_LOCK_INIT(sc) \
mtx_init(&(sc)->sc_mtx, device_get_nameunit((sc)->dev), \ mtx_init(&(sc)->sc_mtx, device_get_nameunit((sc)->dev), \
"bhndb resource allocator lock", MTX_DEF) "bhndb resource allocator lock", MTX_DEF)
#define BHNDB_LOCK(sc) mtx_lock(&(sc)->sc_mtx) #define BHNDB_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
#define BHNDB_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) #define BHNDB_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
#define BHNDB_LOCK_ASSERT(sc, what) mtx_assert(&(sc)->sc_mtx, what) #define BHNDB_LOCK_ASSERT(sc, what) mtx_assert(&(sc)->sc_mtx, what)
#define BHNDB_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx) #define BHNDB_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx)
#endif /* _BHND_BHNDB_PRIVATE_H_ */ #endif /* _BHND_BHNDB_PRIVATE_H_ */