diff options
Diffstat (limited to 'sys/dev/agp')
| -rw-r--r-- | sys/dev/agp/agp_ati.c | 386 | ||||
| -rw-r--r-- | sys/dev/agp/agpreg.h | 12 |
2 files changed, 398 insertions, 0 deletions
diff --git a/sys/dev/agp/agp_ati.c b/sys/dev/agp/agp_ati.c new file mode 100644 index 0000000..8eed871 --- /dev/null +++ b/sys/dev/agp/agp_ati.c @@ -0,0 +1,386 @@ +/*- + * Copyright (c) 2005 Eric Anholt + * 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. + * + * Based on reading the Linux 2.6.8.1 driver by Dave Jones. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_bus.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/proc.h> + +#include <dev/pci/pcivar.h> +#include <dev/pci/pcireg.h> +#include <pci/agppriv.h> +#include <pci/agpreg.h> + +#include <vm/vm.h> +#include <vm/vm_object.h> +#include <vm/pmap.h> +#include <machine/bus.h> +#include <machine/resource.h> +#include <sys/rman.h> + +MALLOC_DECLARE(M_AGP); + +#define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off) +#define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v) + +struct agp_ati_softc { + struct agp_softc agp; + struct resource *regs; /* memory mapped control registers */ + bus_space_tag_t bst; /* bus_space tag */ + bus_space_handle_t bsh; /* bus_space handle */ + u_int32_t initial_aperture; /* aperture size at startup */ + char is_rs300; + + /* The GATT */ + u_int32_t ag_entries; + u_int32_t *ag_virtual; /* virtual address of gatt */ + u_int32_t *ag_vdir; /* virtual address of page dir */ + vm_offset_t ag_pdir; /* physical address of page dir */ +}; + + +static const char* +agp_ati_match(device_t dev) +{ + if (pci_get_class(dev) != PCIC_BRIDGE || + pci_get_subclass(dev) != PCIS_BRIDGE_HOST) + return NULL; + + if (agp_find_caps(dev) == 0) + return NULL; + + switch (pci_get_devid(dev)) { + case 0xcab01002: + return ("ATI RS100 AGP bridge"); + case 0xcab21002: + return ("ATI RS200 AGP bridge"); + case 0xcab31002: + return ("ATI RS250 AGP bridge"); + case 0x58301002: + return ("ATI RS300_100 AGP bridge"); + case 0x58311002: + return ("ATI RS300_133 AGP bridge"); + case 0x58321002: + return ("ATI RS300_166 AGP bridge"); + case 0x58331002: + return ("ATI RS300_200 AGP bridge"); + }; + + return NULL; +} + +static int +agp_ati_probe(device_t dev) +{ + const char *desc; + + desc = agp_ati_match(dev); + if (desc) { + device_verbose(dev); + device_set_desc(dev, desc); + return 0; + } + + return ENXIO; +} + +static int +agp_ati_alloc_gatt(device_t dev) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + u_int32_t apsize = AGP_GET_APERTURE(dev); + u_int32_t entries = apsize >> AGP_PAGE_SHIFT; + u_int32_t apbase_offset; + int i; + + /* Alloc the GATT -- pointers to pages of AGP memory */ + sc->ag_entries = entries; + sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP, + M_NOWAIT | M_ZERO); + if (sc->ag_virtual == NULL) { + if (bootverbose) + device_printf(dev, "aperture allocation failed\n"); + return ENOMEM; + } + + /* Alloc the page directory -- pointers to each page of the GATT */ + sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO); + if (sc->ag_vdir == NULL) { + if (bootverbose) + device_printf(dev, "pagedir allocation failed\n"); + free(sc->ag_virtual, M_AGP); + return ENOMEM; + } + sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir); + + apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22; + /* Fill in the pagedir's pointers to GATT pages */ + for (i = 0; i < sc->ag_entries / 1024; i++) { + vm_offset_t va; + vm_offset_t pa; + + va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE; + pa = vtophys(va); + sc->ag_vdir[apbase_offset + i] = pa | 1; + } + + /* + * Make sure the chipset can see everything. + */ + agp_flush_cache(); + + return 0; +} + + +static int +agp_ati_attach(device_t dev) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + int error, rid; + u_int32_t temp; + u_int32_t apsize_reg, agpmode_reg; + + error = agp_generic_attach(dev); + if (error) + return error; + + switch (pci_get_devid(dev)) { + case 0xcab01002: /* ATI RS100 AGP bridge */ + case 0xcab21002: /*ATI RS200 AGP bridge */ + case 0xcab31002: /* ATI RS250 AGP bridge */ + sc->is_rs300 = 0; + apsize_reg = ATI_RS100_APSIZE; + agpmode_reg = ATI_RS100_IG_AGPMODE; + break; + case 0x58301002: /* ATI RS300_100 AGP bridge */ + case 0x58311002: /* ATI RS300_133 AGP bridge */ + case 0x58321002: /* ATI RS300_166 AGP bridge */ + case 0x58331002: /* ATI RS300_200 AGP bridge */ + sc->is_rs300 = 1; + apsize_reg = ATI_RS300_APSIZE; + agpmode_reg = ATI_RS300_IG_AGPMODE; + break; + default: + /* Unknown chipset */ + return EINVAL; + }; + + rid = ATI_GART_MMADDR; + sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); + if (!sc->regs) { + agp_generic_detach(dev); + return ENOMEM; + } + + sc->bst = rman_get_bustag(sc->regs); + sc->bsh = rman_get_bushandle(sc->regs); + + sc->initial_aperture = AGP_GET_APERTURE(dev); + + for (;;) { + if (agp_ati_alloc_gatt(dev) == 0) + break; + + /* + * Probably contigmalloc failure. Try reducing the + * aperture so that the gatt size reduces. + */ + if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) + return ENOMEM; + } + + temp = pci_read_config(dev, apsize_reg, 4); + pci_write_config(dev, apsize_reg, temp | 1, 4); + + pci_write_config(dev, agpmode_reg, 0x20000, 4); + + WRITE4(ATI_GART_FEATURE_ID, 0x00060000); + + temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ + pci_write_config(dev, 4, temp | (1 << 14), 4); + + WRITE4(ATI_GART_BASE, sc->ag_pdir); + + AGP_FLUSH_TLB(dev); + + return 0; +} + +static int +agp_ati_detach(device_t dev) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + int error; + u_int32_t apsize_reg, temp; + + if (sc->is_rs300) + apsize_reg = ATI_RS300_APSIZE; + else + apsize_reg = ATI_RS100_APSIZE; + + error = agp_generic_detach(dev); + if (error) + return error; + + /* Clear the GATT base */ + WRITE4(ATI_GART_BASE, 0); + + /* Put the aperture back the way it started. */ + AGP_SET_APERTURE(dev, sc->initial_aperture); + + temp = pci_read_config(dev, apsize_reg, 4); + pci_write_config(dev, apsize_reg, temp & ~1, 4); + + free(sc->ag_vdir, M_AGP); + free(sc->ag_virtual, M_AGP); + + bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs); + + return 0; +} + +static u_int32_t +agp_ati_get_aperture(device_t dev) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + int size_value; + + if (sc->is_rs300) + size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); + else + size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); + + size_value = (size_value & 0x0000000e) >> 1; + size_value = (32 * 1024 * 1024) << size_value; + + return size_value; +} + +static int +agp_ati_set_aperture(device_t dev, u_int32_t aperture) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + int size_value; + u_int32_t apsize_reg; + + if (sc->is_rs300) + apsize_reg = ATI_RS300_APSIZE; + else + apsize_reg = ATI_RS100_APSIZE; + + size_value = pci_read_config(dev, apsize_reg, 4); + + size_value &= ~0x0000000e; + size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; + + pci_write_config(dev, apsize_reg, size_value, 4); + + return 0; +} + +static int +agp_ati_bind_page(device_t dev, int offset, vm_offset_t physical) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + + if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) + return EINVAL; + + sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; + + return 0; +} + +static int +agp_ati_unbind_page(device_t dev, int offset) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + + if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) + return EINVAL; + + sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; + return 0; +} + +static void +agp_ati_flush_tlb(device_t dev) +{ + struct agp_ati_softc *sc = device_get_softc(dev); + + /* Set the cache invalidate bit and wait for the chipset to clear */ + WRITE4(ATI_GART_CACHE_CNTRL, 1); + (void)READ4(ATI_GART_CACHE_CNTRL); +} + +static device_method_t agp_ati_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, agp_ati_probe), + DEVMETHOD(device_attach, agp_ati_attach), + DEVMETHOD(device_detach, agp_ati_detach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + DEVMETHOD(device_suspend, bus_generic_suspend), + DEVMETHOD(device_resume, bus_generic_resume), + + /* AGP interface */ + DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), + DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), + DEVMETHOD(agp_bind_page, agp_ati_bind_page), + DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), + DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), + DEVMETHOD(agp_enable, agp_generic_enable), + DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), + DEVMETHOD(agp_free_memory, agp_generic_free_memory), + DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), + DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), + + { 0, 0 } +}; + +static driver_t agp_ati_driver = { + "agp", + agp_ati_methods, + sizeof(struct agp_ati_softc), +}; + +static devclass_t agp_devclass; + +DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, 0, 0); +MODULE_DEPEND(agp_ati, agp, 1, 1, 1); +MODULE_DEPEND(agp_ati, pci, 1, 1, 1); diff --git a/sys/dev/agp/agpreg.h b/sys/dev/agp/agpreg.h index 4b2d5b3..eb5053d 100644 --- a/sys/dev/agp/agpreg.h +++ b/sys/dev/agp/agpreg.h @@ -262,4 +262,16 @@ #define AGP_AMD64_CACHECTRL_INVGART 0x00000001 #define AGP_AMD64_CACHECTRL_PTEERR 0x00000002 +/* + * ATI IGP registers + */ +#define ATI_GART_MMADDR 0x14 +#define ATI_RS100_APSIZE 0xac +#define ATI_RS100_IG_AGPMODE 0xb0 +#define ATI_RS300_APSIZE 0xf8 +#define ATI_RS300_IG_AGPMODE 0xfc +#define ATI_GART_FEATURE_ID 0x00 +#define ATI_GART_BASE 0x04 +#define ATI_GART_CACHE_CNTRL 0x0c + #endif /* !_PCI_AGPREG_H_ */ |
