1 /* $NetBSD: agpvar.h,v 1.22 2022/04/10 09:50:45 andvar 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/mallocvar.h> 35 #include <sys/mutex.h> 36 37 struct agpbus_attach_args { 38 char *_apa_busname; /* XXX placeholder */ 39 struct pci_attach_args apa_pci_args; 40 }; 41 42 /* 43 * The AGP chipset can be acquired by user or kernel code. If the 44 * chipset has already been acquired, it cannot be acquired by another 45 * user until the previous user has released it. 46 */ 47 enum agp_acquire_state { 48 AGP_ACQUIRE_FREE, 49 AGP_ACQUIRE_USER, 50 AGP_ACQUIRE_KERNEL 51 }; 52 53 /* 54 * This structure is used to query the state of the AGP system. 55 */ 56 struct agp_info { 57 u_int32_t ai_mode; 58 bus_addr_t ai_aperture_base; 59 bus_size_t ai_aperture_size; 60 vsize_t ai_memory_allowed; 61 vsize_t ai_memory_used; 62 u_int32_t ai_devid; 63 }; 64 65 struct agp_memory_info { 66 vsize_t ami_size; /* size in bytes */ 67 bus_addr_t ami_physical; /* bogus hack for i810 */ 68 off_t ami_offset; /* page offset if bound */ 69 int ami_is_bound; /* non-zero if bound */ 70 }; 71 72 #ifdef AGP_DEBUG 73 #define AGP_DPF(x) do { \ 74 printf("agp: "); \ 75 printf x; \ 76 } while (0) 77 #else 78 #define AGP_DPF(x) 79 #endif 80 81 #define AGPUNIT(x) minor(x) 82 83 /* 84 * Data structure to describe an AGP memory allocation. 85 */ 86 TAILQ_HEAD(agp_memory_list, agp_memory); 87 struct agp_memory { 88 TAILQ_ENTRY(agp_memory) am_link; /* wiring for the tailq */ 89 int am_id; /* unique id for block */ 90 vsize_t am_size; /* number of bytes allocated */ 91 int am_type; /* chipset specific type */ 92 off_t am_offset; /* page offset if bound */ 93 int am_is_bound; /* non-zero if bound */ 94 bus_addr_t am_physical; 95 void * am_virtual; 96 bus_dmamap_t am_dmamap; 97 bus_dma_segment_t *am_dmaseg; 98 int am_nseg; 99 }; 100 101 struct agp_softc; 102 103 struct agp_methods { 104 u_int32_t (*get_aperture)(struct agp_softc *); 105 int (*set_aperture)(struct agp_softc *, u_int32_t); 106 int (*bind_page)(struct agp_softc *, off_t, bus_addr_t); 107 int (*unbind_page)(struct agp_softc *, off_t); 108 void (*flush_tlb)(struct agp_softc *); 109 int (*enable)(struct agp_softc *, u_int32_t mode); 110 struct agp_memory *(*alloc_memory)(struct agp_softc *, int, vsize_t); 111 int (*free_memory)(struct agp_softc *, struct agp_memory *); 112 int (*bind_memory)(struct agp_softc *, struct agp_memory *, off_t); 113 int (*unbind_memory)(struct agp_softc *, struct agp_memory *); 114 }; 115 116 #define AGP_GET_APERTURE(sc) ((sc)->as_methods->get_aperture(sc)) 117 #define AGP_SET_APERTURE(sc,a) ((sc)->as_methods->set_aperture((sc),(a))) 118 #define AGP_BIND_PAGE(sc,o,p) ((sc)->as_methods->bind_page((sc),(o),(p))) 119 #define AGP_UNBIND_PAGE(sc,o) ((sc)->as_methods->unbind_page((sc), (o))) 120 #define AGP_FLUSH_TLB(sc) ((sc)->as_methods->flush_tlb(sc)) 121 #define AGP_ENABLE(sc,m) ((sc)->as_methods->enable((sc),(m))) 122 #define AGP_ALLOC_MEMORY(sc,t,s) ((sc)->as_methods->alloc_memory((sc),(t),(s))) 123 #define AGP_FREE_MEMORY(sc,m) ((sc)->as_methods->free_memory((sc),(m))) 124 #define AGP_BIND_MEMORY(sc,m,o) ((sc)->as_methods->bind_memory((sc),(m),(o))) 125 #define AGP_UNBIND_MEMORY(sc,m) ((sc)->as_methods->unbind_memory((sc),(m))) 126 127 /* 128 * All chipset drivers must have this at the start of their softc. 129 */ 130 struct agp_softc { 131 device_t as_dev; 132 bus_space_tag_t as_apt; 133 int as_capoff; 134 bus_addr_t as_apaddr; 135 bus_size_t as_apsize; 136 int as_apflags; 137 bus_dma_tag_t as_dmat; 138 u_int32_t as_maxmem; /* allocation upper bound */ 139 u_int32_t as_allocated; /* amount allocated */ 140 enum agp_acquire_state as_state; 141 struct agp_memory_list as_memory; /* list of allocated memory */ 142 int as_nextid; /* next memory block id */ 143 int as_isopen; /* user device is open */ 144 #if 0 145 dev_t as_devnode; /* from make_dev */ 146 #endif 147 kmutex_t as_mtx; /* mutex for access to GATT */ 148 struct agp_methods *as_methods; /* chipset-dependent API */ 149 void *as_chipc; /* chipset-dependent state */ 150 pci_chipset_tag_t as_pc; 151 pcitag_t as_tag; 152 pcireg_t as_id; 153 }; 154 155 struct agp_gatt { 156 u_int32_t ag_entries; 157 u_int32_t *ag_virtual; 158 bus_addr_t ag_physical; 159 bus_dmamap_t ag_dmamap; 160 bus_dma_segment_t ag_dmaseg; 161 size_t ag_size; 162 }; 163 164 int agpbusprint(void *, const char *); 165 166 /* 167 * Functions private to the AGP code. 168 */ 169 void agp_flush_cache(void); 170 int agp_find_caps(pci_chipset_tag_t, pcitag_t); 171 int agp_map_aperture(struct pci_attach_args *, struct agp_softc *, int); 172 struct agp_gatt *agp_alloc_gatt(struct agp_softc *); 173 void agp_free_gatt(struct agp_softc *, struct agp_gatt *); 174 int agp_generic_attach(struct agp_softc *); 175 int agp_generic_detach(struct agp_softc *); 176 int agp_generic_enable(struct agp_softc *, u_int32_t); 177 struct agp_memory *agp_generic_alloc_memory(struct agp_softc *, int, vsize_t); 178 int agp_generic_free_memory(struct agp_softc *, struct agp_memory *); 179 int agp_generic_bind_memory(struct agp_softc *, struct agp_memory *, off_t); 180 int agp_generic_bind_memory_bounded(struct agp_softc *, struct agp_memory *, 181 off_t, off_t, off_t); 182 int agp_generic_unbind_memory(struct agp_softc *, struct agp_memory *); 183 184 /* The vendor has already been matched when these functions are called */ 185 int agp_amd_match(const struct pci_attach_args *); 186 int agp_amd64_match(const struct pci_attach_args *); 187 188 int agp_ali_attach(device_t, device_t, void *); 189 int agp_amd_attach(device_t, device_t, void *); 190 int agp_apple_attach(device_t, device_t, void *); 191 int agp_i810_attach(device_t, device_t, void *); 192 int agp_intel_attach(device_t, device_t, void *); 193 int agp_via_attach(device_t, device_t, void *); 194 int agp_sis_attach(device_t, device_t, void *); 195 int agp_amd64_attach(device_t, device_t, void *); 196 197 int agp_alloc_dmamem(bus_dma_tag_t, size_t, int, bus_dmamap_t *, void **, 198 bus_addr_t *, bus_dma_segment_t *, int, int *); 199 void agp_free_dmamem(bus_dma_tag_t, size_t, bus_dmamap_t, void *, 200 bus_dma_segment_t *, int) ; 201 202 MALLOC_DECLARE(M_AGP); 203 204 /* 205 * Kernel API 206 */ 207 /* 208 * Find the AGP device and return it. 209 */ 210 void *agp_find_device(int); 211 212 /* 213 * Return the current owner of the AGP chipset. 214 */ 215 enum agp_acquire_state agp_state(void *); 216 217 /* 218 * Query the state of the AGP system. 219 */ 220 void agp_get_info(void *, struct agp_info *); 221 222 /* 223 * Acquire the AGP chipset for use by the kernel. Returns EBUSY if the 224 * AGP chipset is already acquired by another user. 225 */ 226 int agp_acquire(void *); 227 228 /* 229 * Release the AGP chipset. 230 */ 231 int agp_release(void *); 232 233 /* 234 * Enable the agp hardware with the relevant mode. The mode bits are 235 * defined in <dev/pci/agpreg.h> 236 */ 237 int agp_enable(void *, u_int32_t); 238 239 /* 240 * Allocate physical memory suitable for mapping into the AGP 241 * aperture. The value returned is an opaque handle which can be 242 * passed to agp_bind(), agp_unbind() or agp_deallocate(). 243 */ 244 void *agp_alloc_memory(void *, int, vsize_t); 245 246 /* 247 * Free memory which was allocated with agp_allocate(). 248 */ 249 void agp_free_memory(void *, void *); 250 251 /* 252 * Bind memory allocated with agp_allocate() at a given offset within 253 * the AGP aperture. Returns EINVAL if the memory is already bound or 254 * the offset is not at an AGP page boundary. 255 */ 256 int agp_bind_memory(void *, void *, off_t); 257 258 /* 259 * Unbind memory from the AGP aperture. Returns EINVAL if the memory 260 * is not bound. 261 */ 262 int agp_unbind_memory(void *, void *); 263 264 /* 265 * Retrieve information about a memory block allocated with 266 * agp_alloc_memory(). 267 */ 268 void agp_memory_info(void *, void *, struct agp_memory_info *); 269 270 /* 271 * XXX horrible hack to allow drm code to use our mapping 272 * of VGA chip registers 273 */ 274 int agp_i810_borrow(bus_addr_t, bus_size_t, bus_space_handle_t *); 275 276 #endif /* !_PCI_AGPPRIV_H_ */ 277
Indexes created Sat Sep 20 22:09:52 GMT 2025