1/*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32#ifndef _SYS_RMAN_H_ 33#define _SYS_RMAN_H_ 1 34 35#ifndef _KERNEL 36#include <sys/queue.h> 37#else 38#include <machine/_bus.h> 39#include <machine/resource.h> 40#endif 41 42#define RF_ALLOCATED 0x0001 /* resource has been reserved */ 43#define RF_ACTIVE 0x0002 /* resource allocation has been activated */ 44#define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */ 45#define RF_SPARE1 0x0008 46#define RF_SPARE2 0x0010 47#define RF_FIRSTSHARE 0x0020 /* first in sharing list */ 48#define RF_PREFETCHABLE 0x0040 /* resource is prefetchable */ 49#define RF_OPTIONAL 0x0080 /* for bus_alloc_resources() */ 50#define RF_UNMAPPED 0x0100 /* don't map resource when activating */ 51 52#define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */ 53#define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT) 54 /* resource address alignment size bit mask */ 55#define RF_ALIGNMENT_LOG2(x) ((x) << RF_ALIGNMENT_SHIFT) 56#define RF_ALIGNMENT(x) (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT) 57 58enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY }; 59 60/* 61 * String length exported to userspace for resource names, etc. 62 */ 63#define RM_TEXTLEN 32 64 65#define RM_MAX_END (~(rman_res_t)0) 66 67#define RMAN_IS_DEFAULT_RANGE(s,e) ((s) == 0 && (e) == RM_MAX_END) 68 69/* 70 * Userspace-exported structures. 71 */ 72struct u_resource { 73 uintptr_t r_handle; /* resource uniquifier */ 74 uintptr_t r_parent; /* parent rman */ 75 uintptr_t r_device; /* device owning this resource */ 76 char r_devname[RM_TEXTLEN]; /* device name XXX obsolete */ 77 78 rman_res_t r_start; /* offset in resource space */ 79 rman_res_t r_size; /* size in resource space */ 80 u_int r_flags; /* RF_* flags */ 81}; 82 83struct u_rman { 84 uintptr_t rm_handle; /* rman uniquifier */ 85 char rm_descr[RM_TEXTLEN]; /* rman description */ 86 87 rman_res_t rm_start; /* base of managed region */ 88 rman_res_t rm_size; /* size of managed region */ 89 enum rman_type rm_type; /* region type */ 90}; 91 92#ifdef _KERNEL 93 94/* 95 * The public (kernel) view of struct resource 96 * 97 * NB: Changing the offset/size/type of existing fields in struct resource 98 * NB: breaks the device driver ABI and is strongly FORBIDDEN. 99 * NB: Appending new fields is probably just misguided. 100 */ 101 102struct resource { 103 struct resource_i *__r_i; 104 bus_space_tag_t r_bustag; /* bus_space tag */ 105 bus_space_handle_t r_bushandle; /* bus_space handle */ 106}; 107 108struct resource_i; 109struct resource_map; 110 111TAILQ_HEAD(resource_head, resource_i); 112 113struct rman { 114 struct resource_head rm_list; 115 struct mtx *rm_mtx; /* mutex used to protect rm_list */ 116 TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */ 117 rman_res_t rm_start; /* index of globally first entry */ 118 rman_res_t rm_end; /* index of globally last entry */ 119 enum rman_type rm_type; /* what type of resource this is */ 120 const char *rm_descr; /* text descripion of this resource */ 121}; 122TAILQ_HEAD(rman_head, rman); 123 124int rman_activate_resource(struct resource *r); 125int rman_adjust_resource(struct resource *r, rman_res_t start, rman_res_t end); 126int rman_first_free_region(struct rman *rm, rman_res_t *start, rman_res_t *end); 127bus_space_handle_t rman_get_bushandle(struct resource *); 128bus_space_tag_t rman_get_bustag(struct resource *); 129rman_res_t rman_get_end(struct resource *); 130struct device *rman_get_device(struct resource *); 131u_int rman_get_flags(struct resource *); 132void rman_get_mapping(struct resource *, struct resource_map *); 133int rman_get_rid(struct resource *); 134rman_res_t rman_get_size(struct resource *); 135rman_res_t rman_get_start(struct resource *); 136void *rman_get_virtual(struct resource *); 137int rman_deactivate_resource(struct resource *r); 138int rman_fini(struct rman *rm); 139int rman_init(struct rman *rm); 140int rman_init_from_resource(struct rman *rm, struct resource *r); 141int rman_last_free_region(struct rman *rm, rman_res_t *start, rman_res_t *end); 142uint32_t rman_make_alignment_flags(uint32_t size); 143int rman_manage_region(struct rman *rm, rman_res_t start, rman_res_t end); 144int rman_is_region_manager(struct resource *r, struct rman *rm); 145int rman_release_resource(struct resource *r); 146struct resource *rman_reserve_resource(struct rman *rm, rman_res_t start, 147 rman_res_t end, rman_res_t count, 148 u_int flags, struct device *dev); 149struct resource *rman_reserve_resource_bound(struct rman *rm, rman_res_t start, 150 rman_res_t end, rman_res_t count, rman_res_t bound, 151 u_int flags, struct device *dev); 152void rman_set_bushandle(struct resource *_r, bus_space_handle_t _h); 153void rman_set_bustag(struct resource *_r, bus_space_tag_t _t); 154void rman_set_device(struct resource *_r, struct device *_dev); 155void rman_set_end(struct resource *_r, rman_res_t _end); 156void rman_set_mapping(struct resource *, struct resource_map *); 157void rman_set_rid(struct resource *_r, int _rid); 158void rman_set_start(struct resource *_r, rman_res_t _start); 159void rman_set_virtual(struct resource *_r, void *_v); 160 161extern struct rman_head rman_head; 162 163#endif /* _KERNEL */ 164 165#endif /* !_SYS_RMAN_H_ */ 166