agpvar.h revision 1.2.2.3
1 /* $NetBSD: agpvar.h,v 1.2.2.3 2002/01/10 19:56:25 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/pci/agppriv.h,v 1.3 2000/07/12 10:13:04 dfr Exp $ 29 */ 30 31 #ifndef _PCI_AGPVAR_H_ 32 #define _PCI_AGPVAR_H_ 33 34 #include <sys/lock.h> 35 36 struct agpbus_attach_args { 37 char *apa_busname; 38 struct pci_attach_args apa_pci_args; 39 }; 40 41 /* 42 * The AGP chipset can be acquired by user or kernel code. If the 43 * chipset has already been acquired, it cannot be acquired by another 44 * user until the previous user has released it. 45 */ 46 enum agp_acquire_state { 47 AGP_ACQUIRE_FREE, 48 AGP_ACQUIRE_USER, 49 AGP_ACQUIRE_KERNEL 50 }; 51 52 /* 53 * This structure is used to query the state of the AGP system. 54 */ 55 struct agp_info { 56 u_int32_t ai_mode; 57 bus_addr_t ai_aperture_base; 58 bus_size_t ai_aperture_size; 59 vsize_t ai_memory_allowed; 60 vsize_t ai_memory_used; 61 u_int32_t ai_devid; 62 }; 63 64 struct agp_memory_info { 65 vsize_t ami_size; /* size in bytes */ 66 bus_addr_t ami_physical; /* bogus hack for i810 */ 67 off_t ami_offset; /* page offset if bound */ 68 int ami_is_bound; /* non-zero if bound */ 69 }; 70 71 #define AGP_DEBUGxx 72 73 #ifdef AGP_DEBUG 74 #define AGP_DPF(x...) do { \ 75 printf("agp: "); \ 76 printf(##x); \ 77 } while (0) 78 #else 79 #define AGP_DPF(x...) do {} while (0) 80 #endif 81 82 #define AGPUNIT(x) minor(x) 83 84 /* 85 * Data structure to describe an AGP memory allocation. 86 */ 87 TAILQ_HEAD(agp_memory_list, agp_memory); 88 struct agp_memory { 89 TAILQ_ENTRY(agp_memory) am_link; /* wiring for the tailq */ 90 int am_id; /* unique id for block */ 91 vsize_t am_size; /* number of bytes allocated */ 92 int am_type; /* chipset specific type */ 93 off_t am_offset; /* page offset if bound */ 94 int am_is_bound; /* non-zero if bound */ 95 bus_addr_t am_physical; 96 caddr_t am_virtual; 97 bus_dmamap_t am_dmamap; 98 bus_dma_segment_t *am_dmaseg; 99 int am_nseg; 100 }; 101 102 struct agp_softc; 103 104 struct agp_methods { 105 u_int32_t (*get_aperture)(struct agp_softc *); 106 int (*set_aperture)(struct agp_softc *, u_int32_t); 107 int (*bind_page)(struct agp_softc *, off_t, bus_addr_t); 108 int (*unbind_page)(struct agp_softc *, off_t); 109 void (*flush_tlb)(struct agp_softc *); 110 int (*enable)(struct agp_softc *, u_int32_t mode); 111 struct agp_memory *(*alloc_memory)(struct agp_softc *, int, vsize_t); 112 int (*free_memory)(struct agp_softc *, struct agp_memory *); 113 int (*bind_memory)(struct agp_softc *, struct agp_memory *, off_t); 114 int (*unbind_memory)(struct agp_softc *, struct agp_memory *); 115 }; 116 117 #define AGP_GET_APERTURE(sc) ((sc)->as_methods->get_aperture(sc)) 118 #define AGP_SET_APERTURE(sc,a) ((sc)->as_methods->set_aperture((sc),(a))) 119 #define AGP_BIND_PAGE(sc,o,p) ((sc)->as_methods->bind_page((sc),(o),(p))) 120 #define AGP_UNBIND_PAGE(sc,o) ((sc)->as_methods->unbind_page((sc), (o))) 121 #define AGP_FLUSH_TLB(sc) ((sc)->as_methods->flush_tlb(sc)) 122 #define AGP_ENABLE(sc,m) ((sc)->as_methods->enable((sc),(m))) 123 #define AGP_ALLOC_MEMORY(sc,t,s) ((sc)->as_methods->alloc_memory((sc),(t),(s))) 124 #define AGP_FREE_MEMORY(sc,m) ((sc)->as_methods->free_memory((sc),(m))) 125 #define AGP_BIND_MEMORY(sc,m,o) ((sc)->as_methods->bind_memory((sc),(m),(o))) 126 #define AGP_UNBIND_MEMORY(sc,m) ((sc)->as_methods->unbind_memory((sc),(m))) 127 128 /* 129 * All chipset drivers must have this at the start of their softc. 130 */ 131 struct agp_softc { 132 struct device as_dev; 133 bus_space_tag_t as_apt; 134 int as_capoff; 135 bus_addr_t as_apaddr; 136 bus_size_t as_apsize; 137 int as_apflags; 138 bus_dma_tag_t as_dmat; 139 u_int32_t as_maxmem; /* allocation upper bound */ 140 u_int32_t as_allocated; /* amount allocated */ 141 enum agp_acquire_state as_state; 142 struct agp_memory_list as_memory; /* list of allocated memory */ 143 int as_nextid; /* next memory block id */ 144 int as_isopen; /* user device is open */ 145 #if 0 146 dev_t as_devnode; /* from make_dev */ 147 #endif 148 struct lock as_lock; /* lock for access to GATT */ 149 struct agp_methods *as_methods; /* chipset-dependent API */ 150 void *as_chipc; /* chipset-dependent state */ 151 pci_chipset_tag_t as_pc; 152 pcitag_t as_tag; 153 pcireg_t as_id; 154 }; 155 156 struct agp_gatt { 157 u_int32_t ag_entries; 158 u_int32_t *ag_virtual; 159 bus_addr_t ag_physical; 160 bus_dmamap_t ag_dmamap; 161 bus_dma_segment_t ag_dmaseg; 162 size_t ag_size; 163 }; 164 165 /* 166 * Functions private to the AGP code. 167 */ 168 void agp_flush_cache(void); 169 int agp_find_caps(pci_chipset_tag_t pct, pcitag_t pt); 170 int agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc); 171 struct agp_gatt *agp_alloc_gatt(struct agp_softc *sc); 172 void agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt); 173 int agp_generic_attach(struct agp_softc *sc); 174 int agp_generic_detach(struct agp_softc *sc); 175 int agp_generic_enable(struct agp_softc *sc, u_int32_t mode); 176 struct agp_memory *agp_generic_alloc_memory(struct agp_softc *sc, int type, 177 vsize_t size); 178 int agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem); 179 int agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 180 off_t offset); 181 int agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem); 182 183 /* The vendor has already been matched when these functions are called */ 184 int agp_amd_match(const struct pci_attach_args *); 185 186 int agp_ali_attach(struct device *parent, struct device *self, void *aux); 187 int agp_amd_attach(struct device *parent, struct device *self, void *aux); 188 int agp_i810_attach(struct device *parent, struct device *self, void *aux); 189 int agp_intel_attach(struct device *parent, struct device *self, void *aux); 190 int agp_via_attach(struct device *parent, struct device *self, void *aux); 191 int agp_sis_attach(struct device *parent, struct device *self, void *aux); 192 193 int agp_alloc_dmamem(bus_dma_tag_t, size_t, int, bus_dmamap_t *, caddr_t *, 194 bus_addr_t *, bus_dma_segment_t *, int, int *); 195 void agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 196 caddr_t vaddr, bus_dma_segment_t *seg, int nseg) ; 197 198 /* 199 * Kernel API 200 */ 201 /* 202 * Find the AGP device and return it. 203 */ 204 void *agp_find_device(int); 205 206 /* 207 * Return the current owner of the AGP chipset. 208 */ 209 enum agp_acquire_state agp_state(void *devcookie); 210 211 /* 212 * Query the state of the AGP system. 213 */ 214 void agp_get_info(void *devhandle, struct agp_info *info); 215 216 /* 217 * Acquire the AGP chipset for use by the kernel. Returns EBUSY if the 218 * AGP chipset is already acquired by another user. 219 */ 220 int agp_acquire(void *devhandle); 221 222 /* 223 * Release the AGP chipset. 224 */ 225 int agp_release(void *devhandle); 226 227 /* 228 * Enable the agp hardware with the relavent mode. The mode bits are 229 * defined in <dev/pci/agpreg.h> 230 */ 231 int agp_enable(void *devhandle, u_int32_t mode); 232 233 /* 234 * Allocate physical memory suitable for mapping into the AGP 235 * aperture. The value returned is an opaque handle which can be 236 * passed to agp_bind(), agp_unbind() or agp_deallocate(). 237 */ 238 void *agp_alloc_memory(void *devhandle, int type, vsize_t bytes); 239 240 /* 241 * Free memory which was allocated with agp_allocate(). 242 */ 243 void agp_free_memory(void *devhandle, void *handle); 244 245 /* 246 * Bind memory allocated with agp_allocate() at a given offset within 247 * the AGP aperture. Returns EINVAL if the memory is already bound or 248 * the offset is not at an AGP page boundary. 249 */ 250 int agp_bind_memory(void *devhandle, void *handle, off_t offset); 251 252 /* 253 * Unbind memory from the AGP aperture. Returns EINVAL if the memory 254 * is not bound. 255 */ 256 int agp_unbind_memory(void *devhandle, void *handle); 257 258 /* 259 * Retrieve information about a memory block allocated with 260 * agp_alloc_memory(). 261 */ 262 void agp_memory_info(void *devhandle, void *handle, struct agp_memory_info *mi); 263 264 #endif /* !_PCI_AGPPRIV_H_ */ 265
Indexes created Wed Oct 15 16:09:53 GMT 2025