1 /*- 2 * SPDX-License-Identifier: MIT 3 * 4 * Copyright 1998 Massachusetts Institute of Technology 5 * 6 * Permission to use, copy, modify, and distribute this software and 7 * its documentation for any purpose and without fee is hereby 8 * granted, provided that both the above copyright notice and this 9 * permission notice appear in all copies, that both the above 10 * copyright notice and this permission notice appear in all 11 * supporting documentation, and that the name of M.I.T. not be used 12 * in advertising or publicity pertaining to distribution of the 13 * software without specific, written prior permission. M.I.T. makes 14 * no representations about the suitability of this software for any 15 * purpose. It is provided "as is" without express or implied 16 * warranty. 17 * 18 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 19 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 22 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 25 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef _SYS_RMAN_H_ 35 #define _SYS_RMAN_H_ 1 36 37 #ifndef _KERNEL 38 #include <sys/queue.h> 39 #else 40 #include <machine/_bus.h> 41 #include <machine/resource.h> 42 #endif 43 44 #define RF_ALLOCATED 0x0001 /* resource has been reserved */ 45 #define RF_ACTIVE 0x0002 /* resource allocation has been activated */ 46 #define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */ 47 #define RF_SPARE1 0x0008 48 #define RF_SPARE2 0x0010 49 #define RF_FIRSTSHARE 0x0020 /* first in sharing list */ 50 #define RF_PREFETCHABLE 0x0040 /* resource is prefetchable */ 51 #define RF_OPTIONAL 0x0080 /* for bus_alloc_resources() */ 52 #define RF_UNMAPPED 0x0100 /* don't map resource when activating */ 53 54 #define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */ 55 #define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT) 56 /* resource address alignment size bit mask */ 57 #define RF_ALIGNMENT_LOG2(x) ((x) << RF_ALIGNMENT_SHIFT) 58 #define RF_ALIGNMENT(x) (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT) 59 60 enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY }; 61 62 /* 63 * String length exported to userspace for resource names, etc. 64 */ 65 #define RM_TEXTLEN 32 66 67 #define RM_MAX_END (~(rman_res_t)0) 68 69 #define RMAN_IS_DEFAULT_RANGE(s,e) ((s) == 0 && (e) == RM_MAX_END) 70 71 /* 72 * Userspace-exported structures. 73 */ 74 struct u_resource { 75 uintptr_t r_handle; /* resource uniquifier */ 76 uintptr_t r_parent; /* parent rman */ 77 uintptr_t r_device; /* device owning this resource */ 78 char r_devname[RM_TEXTLEN]; /* device name XXX obsolete */ 79 80 rman_res_t r_start; /* offset in resource space */ 81 rman_res_t r_size; /* size in resource space */ 82 u_int r_flags; /* RF_* flags */ 83 }; 84 85 struct u_rman { 86 uintptr_t rm_handle; /* rman uniquifier */ 87 char rm_descr[RM_TEXTLEN]; /* rman description */ 88 89 rman_res_t rm_start; /* base of managed region */ 90 rman_res_t rm_size; /* size of managed region */ 91 enum rman_type rm_type; /* region type */ 92 }; 93 94 #ifdef _KERNEL 95 96 /* 97 * The public (kernel) view of struct resource 98 * 99 * NB: Changing the offset/size/type of existing fields in struct resource 100 * NB: breaks the device driver ABI and is strongly FORBIDDEN. 101 * NB: Appending new fields is probably just misguided. 102 */ 103 104 struct resource { 105 struct resource_i *__r_i; 106 bus_space_tag_t r_bustag; /* bus_space tag */ 107 bus_space_handle_t r_bushandle; /* bus_space handle */ 108 }; 109 110 struct resource_i; 111 struct resource_map; 112 113 TAILQ_HEAD(resource_head, resource_i); 114 115 struct rman { 116 struct resource_head rm_list; 117 struct mtx *rm_mtx; /* mutex used to protect rm_list */ 118 TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */ 119 rman_res_t rm_start; /* index of globally first entry */ 120 rman_res_t rm_end; /* index of globally last entry */ 121 enum rman_type rm_type; /* what type of resource this is */ 122 const char *rm_descr; /* text descripion of this resource */ 123 }; 124 TAILQ_HEAD(rman_head, rman); 125 126 int rman_activate_resource(struct resource *r); 127 int rman_adjust_resource(struct resource *r, rman_res_t start, rman_res_t end); 128 int rman_first_free_region(struct rman *rm, rman_res_t *start, rman_res_t *end); 129 bus_space_handle_t rman_get_bushandle(struct resource *); 130 bus_space_tag_t rman_get_bustag(struct resource *); 131 rman_res_t rman_get_end(struct resource *); 132 device_t rman_get_device(struct resource *); 133 u_int rman_get_flags(struct resource *); 134 void rman_get_mapping(struct resource *, struct resource_map *); 135 int rman_get_rid(struct resource *); 136 rman_res_t rman_get_size(struct resource *); 137 rman_res_t rman_get_start(struct resource *); 138 void *rman_get_virtual(struct resource *); 139 int rman_deactivate_resource(struct resource *r); 140 int rman_fini(struct rman *rm); 141 int rman_init(struct rman *rm); 142 int rman_init_from_resource(struct rman *rm, struct resource *r); 143 int rman_last_free_region(struct rman *rm, rman_res_t *start, rman_res_t *end); 144 uint32_t rman_make_alignment_flags(uint32_t size); 145 int rman_manage_region(struct rman *rm, rman_res_t start, rman_res_t end); 146 int rman_is_region_manager(struct resource *r, struct rman *rm); 147 int rman_release_resource(struct resource *r); 148 struct resource *rman_reserve_resource(struct rman *rm, rman_res_t start, 149 rman_res_t end, rman_res_t count, 150 u_int flags, device_t dev); 151 struct resource *rman_reserve_resource_bound(struct rman *rm, rman_res_t start, 152 rman_res_t end, rman_res_t count, rman_res_t bound, 153 u_int flags, device_t dev); 154 void rman_set_bushandle(struct resource *_r, bus_space_handle_t _h); 155 void rman_set_bustag(struct resource *_r, bus_space_tag_t _t); 156 void rman_set_device(struct resource *_r, device_t _dev); 157 void rman_set_end(struct resource *_r, rman_res_t _end); 158 void rman_set_mapping(struct resource *, struct resource_map *); 159 void rman_set_rid(struct resource *_r, int _rid); 160 void rman_set_start(struct resource *_r, rman_res_t _start); 161 void rman_set_virtual(struct resource *_r, void *_v); 162 163 extern struct rman_head rman_head; 164 165 #endif /* _KERNEL */ 166 167 #endif /* !_SYS_RMAN_H_ */ 168