/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2000 Doug Rabson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_agp.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MODULE_VERSION(agp, 1); MALLOC_DEFINE(M_AGP, "agp", "AGP data structures"); /* agp_drv.c */ static d_open_t agp_open; static d_close_t agp_close; static d_ioctl_t agp_ioctl; static d_mmap_t agp_mmap; static struct cdevsw agp_cdevsw = { .d_version = D_VERSION, .d_flags = D_NEEDGIANT, .d_open = agp_open, .d_close = agp_close, .d_ioctl = agp_ioctl, .d_mmap = agp_mmap, .d_name = "agp", }; static devclass_t agp_devclass; /* Helper functions for implementing chipset mini drivers. */ u_int8_t agp_find_caps(device_t dev) { int capreg; if (pci_find_cap(dev, PCIY_AGP, &capreg) != 0) capreg = 0; return (capreg); } /* * Find an AGP display device (if any). */ static device_t agp_find_display(void) { devclass_t pci = devclass_find("pci"); device_t bus, dev = 0; device_t *kids; int busnum, numkids, i; for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) { bus = devclass_get_device(pci, busnum); if (!bus) continue; if (device_get_children(bus, &kids, &numkids) != 0) continue; for (i = 0; i < numkids; i++) { dev = kids[i]; if (pci_get_class(dev) == PCIC_DISPLAY && pci_get_subclass(dev) == PCIS_DISPLAY_VGA) if (agp_find_caps(dev)) { free(kids, M_TEMP); return dev; } } free(kids, M_TEMP); } return 0; } struct agp_gatt * agp_alloc_gatt(device_t dev) { u_int32_t apsize = AGP_GET_APERTURE(dev); u_int32_t entries = apsize >> AGP_PAGE_SHIFT; struct agp_gatt *gatt; if (bootverbose) device_printf(dev, "allocating GATT for aperture of size %dM\n", apsize / (1024*1024)); if (entries == 0) { device_printf(dev, "bad aperture size\n"); return NULL; } gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); if (!gatt) return 0; gatt->ag_entries = entries; gatt->ag_virtual = kmem_alloc_contig(entries * sizeof(uint32_t), M_NOWAIT | M_ZERO, 0, ~0, PAGE_SIZE, 0, VM_MEMATTR_WRITE_COMBINING); if (!gatt->ag_virtual) { if (bootverbose) device_printf(dev, "contiguous allocation failed\n"); free(gatt, M_AGP); return 0; } gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual); return gatt; } void agp_free_gatt(struct agp_gatt *gatt) { kmem_free(gatt->ag_virtual, gatt->ag_entries * sizeof(uint32_t)); free(gatt, M_AGP); } static u_int agp_max[][2] = { {0, 0}, {32, 4}, {64, 28}, {128, 96}, {256, 204}, {512, 440}, {1024, 942}, {2048, 1920}, {4096, 3932} }; #define AGP_MAX_SIZE nitems(agp_max) /** * Sets the PCI resource which represents the AGP aperture. * * If not called, the default AGP aperture resource of AGP_APBASE will * be used. Must be called before agp_generic_attach(). */ void agp_set_aperture_resource(device_t dev, int rid) { struct agp_softc *sc = device_get_softc(dev); sc->as_aperture_rid = rid; } int agp_generic_attach(device_t dev) { struct make_dev_args mdargs; struct agp_softc *sc = device_get_softc(dev); int error, i, unit; u_int memsize; /* * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE * because the kernel doesn't need to map it. */ if (sc->as_aperture_rid != -1) { if (sc->as_aperture_rid == 0) sc->as_aperture_rid = AGP_APBASE; sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->as_aperture_rid, RF_SHAREABLE); if (!sc->as_aperture) return ENOMEM; } /* * Work out an upper bound for agp memory allocation. This * uses a heurisitc table from the Linux driver. */ memsize = ptoa(realmem) >> 20; for (i = 0; i < AGP_MAX_SIZE; i++) { if (memsize <= agp_max[i][0]) break; } if (i == AGP_MAX_SIZE) i = AGP_MAX_SIZE - 1; sc->as_maxmem = agp_max[i][1] << 20U; /* * The lock is used to prevent re-entry to * agp_generic_bind_memory() since that function can sleep. */ mtx_init(&sc->as_lock, "agp lock", NULL, MTX_DEF); /* * Initialise stuff for the userland device. */ agp_devclass = devclass_find("agp"); TAILQ_INIT(&sc->as_memory); sc->as_nextid = 1; sc->as_devalias = NULL; make_dev_args_init(&mdargs); mdargs.mda_devsw = &agp_cdevsw; mdargs.mda_uid = UID_ROOT; mdargs.mda_gid = GID_WHEEL; mdargs.mda_mode = 0600; mdargs.mda_si_drv1 = sc; mdargs.mda_si_drv2 = NULL; unit = device_get_unit(dev); error = make_dev_s(&mdargs, &sc->as_devnode, "agpgart%d", unit); if (error == 0) { /* * Create an alias for the first device that shows up. */ if (unit == 0) { (void)make_dev_alias_p(MAKEDEV_CHECKNAME, &sc->as_devalias, sc->as_devnode, "agpgart"); } } else { agp_free_res(dev); } return error; } void agp_free_cdev(device_t dev) { struct agp_softc *sc = device_get_softc(dev); destroy_dev(sc->as_devnode); if (sc->as_devalias != NULL) destroy_dev(sc->as_devalias); } void agp_free_res(device_t dev) { struct agp_softc *sc = device_get_softc(dev); if (sc->as_aperture != NULL) bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid, sc->as_aperture); mtx_destroy(&sc->as_lock); } int agp_generic_detach(device_t dev) { agp_free_cdev(dev); agp_free_res(dev); return 0; } /** * Default AGP aperture size detection which simply returns the size of * the aperture's PCI resource. */ u_int32_t agp_generic_get_aperture(device_t dev) { struct agp_softc *sc = device_get_softc(dev); return rman_get_size(sc->as_aperture); } /** * Default AGP aperture size setting function, which simply doesn't allow * changes to resource size. */ int agp_generic_set_aperture(device_t dev, u_int32_t aperture) { u_int32_t current_aperture; current_aperture = AGP_GET_APERTURE(dev); if (current_aperture != aperture) return EINVAL; else return 0; } /* * This does the enable logic for v3, with the same topology * restrictions as in place for v2 -- one bus, one device on the bus. */ static int agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode) { u_int32_t tstatus, mstatus; u_int32_t command; int rq, sba, fw, rate, arqsz, cal; tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4); /* Set RQ to the min of mode, tstatus and mstatus */ rq = AGP_MODE_GET_RQ(mode); if (AGP_MODE_GET_RQ(tstatus) < rq) rq = AGP_MODE_GET_RQ(tstatus); if (AGP_MODE_GET_RQ(mstatus) < rq) rq = AGP_MODE_GET_RQ(mstatus); /* * ARQSZ - Set the value to the maximum one. * Don't allow the mode register to override values. */ arqsz = AGP_MODE_GET_ARQSZ(mode); if (AGP_MODE_GET_ARQSZ(tstatus) > rq) rq = AGP_MODE_GET_ARQSZ(tstatus); if (AGP_MODE_GET_ARQSZ(mstatus) > rq) rq = AGP_MODE_GET_ARQSZ(mstatus); /* Calibration cycle - don't allow override by mode register */ cal = AGP_MODE_GET_CAL(tstatus); if (AGP_MODE_GET_CAL(mstatus) < cal) cal = AGP_MODE_GET_CAL(mstatus); /* SBA must be supported for AGP v3. */ sba = 1; /* Set FW if all three support it. */ fw = (AGP_MODE_GET_FW(tstatus) & AGP_MODE_GET_FW(mstatus) & AGP_MODE_GET_FW(mode)); /* Figure out the max rate */ rate = (AGP_MODE_GET_RATE(tstatus) & AGP_MODE_GET_RATE(mstatus) & AGP_MODE_GET_RATE(mode)); if (rate & AGP_MODE_V3_RATE_8x) rate = AGP_MODE_V3_RATE_8x; else rate = AGP_MODE_V3_RATE_4x; if (bootverbose) device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4); pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4); /* Construct the new mode word and tell the hardware */ command = 0; command = AGP_MODE_SET_RQ(0, rq); command = AGP_MODE_SET_ARQSZ(command, arqsz); command = AGP_MODE_SET_CAL(command, cal); command = AGP_MODE_SET_SBA(command, sba); command = AGP_MODE_SET_FW(command, fw); command = AGP_MODE_SET_RATE(command, rate); command = AGP_MODE_SET_MODE_3(command, 1); command = AGP_MODE_SET_AGP(command, 1); pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4); pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4); return 0; } static int agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode) { u_int32_t tstatus, mstatus; u_int32_t command; int rq, sba, fw, rate; tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4); /* Set RQ to the min of mode, tstatus and mstatus */ rq = AGP_MODE_GET_RQ(mode); if (AGP_MODE_GET_RQ(tstatus) < rq) rq = AGP_MODE_GET_RQ(tstatus); if (AGP_MODE_GET_RQ(mstatus) < rq) rq = AGP_MODE_GET_RQ(mstatus); /* Set SBA if all three can deal with SBA */ sba = (AGP_MODE_GET_SBA(tstatus) & AGP_MODE_GET_SBA(mstatus) & AGP_MODE_GET_SBA(mode)); /* Similar for FW */ fw = (AGP_MODE_GET_FW(tstatus) & AGP_MODE_GET_FW(mstatus) & AGP_MODE_GET_FW(mode)); /* Figure out the max rate */ rate = (AGP_MODE_GET_RATE(tstatus) & AGP_MODE_GET_RATE(mstatus) & AGP_MODE_GET_RATE(mode)); if (rate & AGP_MODE_V2_RATE_4x) rate = AGP_MODE_V2_RATE_4x; else if (rate & AGP_MODE_V2_RATE_2x) rate = AGP_MODE_V2_RATE_2x; else rate = AGP_MODE_V2_RATE_1x; if (bootverbose) device_printf(dev, "Setting AGP v2 mode %d\n", rate); /* Construct the new mode word and tell the hardware */ command = 0; command = AGP_MODE_SET_RQ(0, rq); command = AGP_MODE_SET_SBA(command, sba); command = AGP_MODE_SET_FW(command, fw); command = AGP_MODE_SET_RATE(command, rate); command = AGP_MODE_SET_AGP(command, 1); pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4); pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4); return 0; } int agp_generic_enable(device_t dev, u_int32_t mode) { device_t mdev = agp_find_display(); u_int32_t tstatus, mstatus; if (!mdev) { AGP_DPF("can't find display\n"); return ENXIO; } tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4); /* * Check display and bridge for AGP v3 support. AGP v3 allows * more variety in topology than v2, e.g. multiple AGP devices * attached to one bridge, or multiple AGP bridges in one * system. This doesn't attempt to address those situations, * but should work fine for a classic single AGP slot system * with AGP v3. */ if (AGP_MODE_GET_MODE_3(mode) && AGP_MODE_GET_MODE_3(tstatus) && AGP_MODE_GET_MODE_3(mstatus)) return (agp_v3_enable(dev, mdev, mode)); else return (agp_v2_enable(dev, mdev, mode)); } struct agp_memory * agp_generic_alloc_memory(device_t dev, int type, vm_size_t size) { struct agp_softc *sc = device_get_softc(dev); struct agp_memory *mem; if ((size & (AGP_PAGE_SIZE - 1)) != 0) return 0; if (size > sc->as_maxmem - sc->as_allocated) return 0; if (type != 0) { printf("agp_generic_alloc_memory: unsupported type %d\n", type); return 0; } mem = malloc(sizeof *mem, M_AGP, M_WAITOK); mem->am_id = sc->as_nextid++; mem->am_size = size; mem->am_type = 0; mem->am_obj = vm_object_allocate(OBJT_SWAP, atop(round_page(size))); mem->am_physical = 0; mem->am_offset = 0; mem->am_is_bound = 0; TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); sc->as_allocated += size; return mem; } int agp_generic_free_memory(device_t dev, struct agp_memory *mem) { struct agp_softc *sc = device_get_softc(dev); if (mem->am_is_bound) return EBUSY; sc->as_allocated -= mem->am_size; TAILQ_REMOVE(&sc->as_memory, mem, am_link); vm_object_deallocate(mem->am_obj); free(mem, M_AGP); return 0; } int agp_generic_bind_memory(device_t dev, struct agp_memory *mem, vm_offset_t offset) { struct agp_softc *sc = device_get_softc(dev); vm_offset_t i, j, k; vm_page_t m; int error; /* Do some sanity checks first. */ if ((offset & (AGP_PAGE_SIZE - 1)) != 0 || offset + mem->am_size > AGP_GET_APERTURE(dev)) { device_printf(dev, "binding memory at bad offset %#x\n", (int)offset); return EINVAL; } /* * Allocate the pages early, before acquiring the lock, * because vm_page_grab() may sleep and we can't hold a mutex * while sleeping. */ VM_OBJECT_WLOCK(mem->am_obj); for (i = 0; i < mem->am_size; i += PAGE_SIZE) { /* * Find a page from the object and wire it * down. This page will be mapped using one or more * entries in the GATT (assuming that PAGE_SIZE >= * AGP_PAGE_SIZE. If this is the first call to bind, * the pages will be allocated and zeroed. */ m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i), VM_ALLOC_WIRED | VM_ALLOC_ZERO); AGP_DPF("found page pa=%#jx\n", (uintmax_t)VM_PAGE_TO_PHYS(m)); } VM_OBJECT_WUNLOCK(mem->am_obj); mtx_lock(&sc->as_lock); if (mem->am_is_bound) { device_printf(dev, "memory already bound\n"); error = EINVAL; VM_OBJECT_WLOCK(mem->am_obj); i = 0; goto bad; } /* * Bind the individual pages and flush the chipset's * TLB. */ VM_OBJECT_WLOCK(mem->am_obj); for (i = 0; i < mem->am_size; i += PAGE_SIZE) { m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(i)); /* * Install entries in the GATT, making sure that if * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not * aligned to PAGE_SIZE, we don't modify too many GATT * entries. */ for (j = 0; j < PAGE_SIZE && i + j < mem->am_size; j += AGP_PAGE_SIZE) { vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j; AGP_DPF("binding offset %#jx to pa %#jx\n", (uintmax_t)offset + i + j, (uintmax_t)pa); error = AGP_BIND_PAGE(dev, offset + i + j, pa); if (error) { /* * Bail out. Reverse all the mappings * and unwire the pages. */ for (k = 0; k < i + j; k += AGP_PAGE_SIZE) AGP_UNBIND_PAGE(dev, offset + k); goto bad; } } vm_page_xunbusy(m); } VM_OBJECT_WUNLOCK(mem->am_obj); /* * Make sure the chipset gets the new mappings. */ AGP_FLUSH_TLB(dev); mem->am_offset = offset; mem->am_is_bound = 1; mtx_unlock(&sc->as_lock); return 0; bad: mtx_unlock(&sc->as_lock); VM_OBJECT_ASSERT_WLOCKED(mem->am_obj); for (k = 0; k < mem->am_size; k += PAGE_SIZE) { m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(k)); if (k >= i) vm_page_xunbusy(m); vm_page_unwire(m, PQ_INACTIVE); } VM_OBJECT_WUNLOCK(mem->am_obj); return error; } int agp_generic_unbind_memory(device_t dev, struct agp_memory *mem) { struct agp_softc *sc = device_get_softc(dev); vm_page_t m; int i; mtx_lock(&sc->as_lock); if (!mem->am_is_bound) { device_printf(dev, "memory is not bound\n"); mtx_unlock(&sc->as_lock); return EINVAL; } /* * Unbind the individual pages and flush the chipset's * TLB. Unwire the pages so they can be swapped. */ for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) AGP_UNBIND_PAGE(dev, mem->am_offset + i); AGP_FLUSH_TLB(dev); VM_OBJECT_WLOCK(mem->am_obj); for (i = 0; i < mem->am_size; i += PAGE_SIZE) { m = vm_page_lookup(mem->am_obj, atop(i)); vm_page_unwire(m, PQ_INACTIVE); } VM_OBJECT_WUNLOCK(mem->am_obj); mem->am_offset = 0; mem->am_is_bound = 0; mtx_unlock(&sc->as_lock); return 0; } /* Helper functions for implementing user/kernel api */ static int agp_acquire_helper(device_t dev, enum agp_acquire_state state) { struct agp_softc *sc = device_get_softc(dev); if (sc->as_state != AGP_ACQUIRE_FREE) return EBUSY; sc->as_state = state; return 0; } static int agp_release_helper(device_t dev, enum agp_acquire_state state) { struct agp_softc *sc = device_get_softc(dev); if (sc->as_state == AGP_ACQUIRE_FREE) return 0; if (sc->as_state != state) return EBUSY; sc->as_state = AGP_ACQUIRE_FREE; return 0; } static struct agp_memory * agp_find_memory(device_t dev, int id) { struct agp_softc *sc = device_get_softc(dev); struct agp_memory *mem; AGP_DPF("searching for memory block %d\n", id); TAILQ_FOREACH(mem, &sc->as_memory, am_link) { AGP_DPF("considering memory block %d\n", mem->am_id); if (mem->am_id == id) return mem; } return 0; } /* Implementation of the userland ioctl api */ static int agp_info_user(device_t dev, agp_info *info) { struct agp_softc *sc = device_get_softc(dev); bzero(info, sizeof *info); info->bridge_id = pci_get_devid(dev); info->agp_mode = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); if (sc->as_aperture) info->aper_base = rman_get_start(sc->as_aperture); else info->aper_base = 0; info->aper_size = AGP_GET_APERTURE(dev) >> 20; info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; return 0; } static int agp_setup_user(device_t dev, agp_setup *setup) { return AGP_ENABLE(dev, setup->agp_mode); } static int agp_allocate_user(device_t dev, agp_allocate *alloc) { struct agp_memory *mem; mem = AGP_ALLOC_MEMORY(dev, alloc->type, alloc->pg_count << AGP_PAGE_SHIFT); if (mem) { alloc->key = mem->am_id; alloc->physical = mem->am_physical; return 0; } else { return ENOMEM; } } static int agp_deallocate_user(device_t dev, int id) { struct agp_memory *mem = agp_find_memory(dev, id); if (mem) { AGP_FREE_MEMORY(dev, mem); return 0; } else { return ENOENT; } } static int agp_bind_user(device_t dev, agp_bind *bind) { struct agp_memory *mem = agp_find_memory(dev, bind->key); if (!mem) return ENOENT; return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT); } static int agp_unbind_user(device_t dev, agp_unbind *unbind) { struct agp_memory *mem = agp_find_memory(dev, unbind->key); if (!mem) return ENOENT; return AGP_UNBIND_MEMORY(dev, mem); } static int agp_chipset_flush(device_t dev) { return (AGP_CHIPSET_FLUSH(dev)); } static int agp_open(struct cdev *kdev, int oflags, int devtype, struct thread *td) { device_t dev = kdev->si_drv1; struct agp_softc *sc = device_get_softc(dev); if (!sc->as_isopen) { sc->as_isopen = 1; device_busy(dev); } return 0; } static int agp_close(struct cdev *kdev, int fflag, int devtype, struct thread *td) { device_t dev = kdev->si_drv1; struct agp_softc *sc = device_get_softc(dev); struct agp_memory *mem; /* * Clear the GATT and force release on last close */ while ((mem = TAILQ_FIRST(&sc->as_memory)) != NULL) { if (mem->am_is_bound) AGP_UNBIND_MEMORY(dev, mem); AGP_FREE_MEMORY(dev, mem); } if (sc->as_state == AGP_ACQUIRE_USER) agp_release_helper(dev, AGP_ACQUIRE_USER); sc->as_isopen = 0; device_unbusy(dev); return 0; } static int agp_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int fflag, struct thread *td) { device_t dev = kdev->si_drv1; switch (cmd) { case AGPIOC_INFO: return agp_info_user(dev, (agp_info *) data); case AGPIOC_ACQUIRE: return agp_acquire_helper(dev, AGP_ACQUIRE_USER); case AGPIOC_RELEASE: return agp_release_helper(dev, AGP_ACQUIRE_USER); case AGPIOC_SETUP: return agp_setup_user(dev, (agp_setup *)data); case AGPIOC_ALLOCATE: return agp_allocate_user(dev, (agp_allocate *)data); case AGPIOC_DEALLOCATE: return agp_deallocate_user(dev, *(int *) data); case AGPIOC_BIND: return agp_bind_user(dev, (agp_bind *)data); case AGPIOC_UNBIND: return agp_unbind_user(dev, (agp_unbind *)data); case AGPIOC_CHIPSET_FLUSH: return agp_chipset_flush(dev); } return EINVAL; } static int agp_mmap(struct cdev *kdev, vm_ooffset_t offset, vm_paddr_t *paddr, int prot, vm_memattr_t *memattr) { device_t dev = kdev->si_drv1; struct agp_softc *sc = device_get_softc(dev); if (offset > AGP_GET_APERTURE(dev)) return -1; if (sc->as_aperture == NULL) return -1; *paddr = rman_get_start(sc->as_aperture) + offset; return 0; } /* Implementation of the kernel api */ device_t agp_find_device(void) { device_t *children, child; int i, count; if (!agp_devclass) return NULL; if (devclass_get_devices(agp_devclass, &children, &count) != 0) return NULL; child = NULL; for (i = 0; i < count; i++) { if (device_is_attached(children[i])) { child = children[i]; break; } } free(children, M_TEMP); return child; } enum agp_acquire_state agp_state(device_t dev) { struct agp_softc *sc = device_get_softc(dev); return sc->as_state; } void agp_get_info(device_t dev, struct agp_info *info) { struct agp_softc *sc = device_get_softc(dev); info->ai_mode = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); if (sc->as_aperture != NULL) info->ai_aperture_base = rman_get_start(sc->as_aperture); else info->ai_aperture_base = 0; info->ai_aperture_size = AGP_GET_APERTURE(dev); info->ai_memory_allowed = sc->as_maxmem; info->ai_memory_used = sc->as_allocated; } int agp_acquire(device_t dev) { return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); } int agp_release(device_t dev) { return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); } int agp_enable(device_t dev, u_int32_t mode) { return AGP_ENABLE(dev, mode); } void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes) { return (void *) AGP_ALLOC_MEMORY(dev, type, bytes); } void agp_free_memory(device_t dev, void *handle) { struct agp_memory *mem = (struct agp_memory *) handle; AGP_FREE_MEMORY(dev, mem); } int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset) { struct agp_memory *mem = (struct agp_memory *) handle; return AGP_BIND_MEMORY(dev, mem, offset); } int agp_unbind_memory(device_t dev, void *handle) { struct agp_memory *mem = (struct agp_memory *) handle; return AGP_UNBIND_MEMORY(dev, mem); } void agp_memory_info(device_t dev, void *handle, struct agp_memory_info *mi) { struct agp_memory *mem = (struct agp_memory *) handle; mi->ami_size = mem->am_size; mi->ami_physical = mem->am_physical; mi->ami_offset = mem->am_offset; mi->ami_is_bound = mem->am_is_bound; } int agp_bind_pages(device_t dev, vm_page_t *pages, vm_size_t size, vm_offset_t offset) { struct agp_softc *sc; vm_offset_t i, j, k, pa; vm_page_t m; int error; if ((size & (AGP_PAGE_SIZE - 1)) != 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0) return (EINVAL); sc = device_get_softc(dev); mtx_lock(&sc->as_lock); for (i = 0; i < size; i += PAGE_SIZE) { m = pages[OFF_TO_IDX(i)]; KASSERT(vm_page_wired(m), ("agp_bind_pages: page %p hasn't been wired", m)); /* * Install entries in the GATT, making sure that if * AGP_PAGE_SIZE < PAGE_SIZE and size is not * aligned to PAGE_SIZE, we don't modify too many GATT * entries. */ for (j = 0; j < PAGE_SIZE && i + j < size; j += AGP_PAGE_SIZE) { pa = VM_PAGE_TO_PHYS(m) + j; AGP_DPF("binding offset %#jx to pa %#jx\n", (uintmax_t)offset + i + j, (uintmax_t)pa); error = AGP_BIND_PAGE(dev, offset + i + j, pa); if (error) { /* * Bail out. Reverse all the mappings. */ for (k = 0; k < i + j; k += AGP_PAGE_SIZE) AGP_UNBIND_PAGE(dev, offset + k); mtx_unlock(&sc->as_lock); return (error); } } } AGP_FLUSH_TLB(dev); mtx_unlock(&sc->as_lock); return (0); } int agp_unbind_pages(device_t dev, vm_size_t size, vm_offset_t offset) { struct agp_softc *sc; vm_offset_t i; if ((size & (AGP_PAGE_SIZE - 1)) != 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0) return (EINVAL); sc = device_get_softc(dev); mtx_lock(&sc->as_lock); for (i = 0; i < size; i += AGP_PAGE_SIZE) AGP_UNBIND_PAGE(dev, offset + i); AGP_FLUSH_TLB(dev); mtx_unlock(&sc->as_lock); return (0); }