FreeBSD-5.3/sys/alpha/pci/cia_pci.c
/*-
* Copyright (c) 1998 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.
*
*/
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/alpha/pci/cia_pci.c,v 1.17 2003/08/22 07:20:27 imp Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <sys/rman.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <machine/cpuconf.h>
#include <machine/bwx.h>
#include <machine/swiz.h>
#include <alpha/pci/ciareg.h>
#include <alpha/pci/ciavar.h>
#include <alpha/pci/pcibus.h>
#include <alpha/isa/isavar.h>
#include "alphapci_if.h"
#include "pcib_if.h"
#define KV(pa) ALPHA_PHYS_TO_K0SEG(pa)
static devclass_t pcib_devclass;
static int
cia_pcib_probe(device_t dev)
{
device_set_desc(dev, "2117x PCI host bus adapter");
pci_init_resources();
device_add_child(dev, "pci", 0);
return 0;
}
static int
cia_pcib_read_ivar(device_t dev, device_t child, int which, u_long *result)
{
switch (which) {
case PCIB_IVAR_BUS:
*result = 0;
return 0;
}
return ENOENT;
}
static void *
cia_pcib_cvt_dense(device_t dev, vm_offset_t addr)
{
addr &= 0xffffffffUL;
return (void *) KV(addr | CIA_PCI_DENSE);
}
static void *
cia_pcib_cvt_bwx(device_t dev, vm_offset_t addr)
{
if (chipset_bwx) {
addr &= 0xffffffffUL;
return (void *) KV(addr | CIA_EV56_BWMEM);
} else {
return 0;
}
}
static void
cia_clear_abort(void)
{
/*
* Some (apparently-common) revisions of EB164 and AlphaStation
* firmware do the Wrong thing with PCI master and target aborts,
* which are caused by accesing the configuration space of devices
* that don't exist (for example).
*
* To work around this, we clear the CIA error register's PCI
* master and target abort bits before touching PCI configuration
* space and check it afterwards. If it indicates a master or target
* abort, the device wasn't there so we return 0xffffffff.
*/
REGVAL(CIA_CSR_CIA_ERR) = CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT;
alpha_mb();
alpha_pal_draina();
}
static int
cia_check_abort(void)
{
u_int32_t errbits;
int ba = 0;
alpha_pal_draina();
alpha_mb();
errbits = REGVAL(CIA_CSR_CIA_ERR);
if (errbits & (CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT))
ba = 1;
if (errbits) {
REGVAL(CIA_CSR_CIA_ERR) = errbits;
alpha_mb();
alpha_pal_draina();
}
return ba;
}
#define CIA_BWX_CFGADDR(b, s, f, r) \
KV(((b) ? CIA_EV56_BWCONF1 : CIA_EV56_BWCONF0) \
| ((b) << 16) | ((s) << 11) | ((f) << 8) | (r))
#define BWX_CFGREAD(b, s, f, r, width, type, op) do { \
vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); \
type data; \
cia_clear_abort(); \
if (badaddr((caddr_t)va, width)) { \
cia_check_abort(); \
return ~0; \
} \
data = op(va); \
if (cia_check_abort()) \
return ~0; \
return data; \
} while (0)
#define BWX_CFGWRITE(b, s, f, r, data, width, type, op) do { \
vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); \
cia_clear_abort(); \
if (badaddr((caddr_t)va, width)) return; \
op(va, data); \
cia_check_abort(); \
return; \
} while (0)
#define CIA_SWIZ_CFGOFF(b, s, f, r) \
(((b) << 16) | ((s) << 11) | ((f) << 8) | (r))
/* when doing a type 1 pci configuration space access, we
* must set a bit in the CIA_CSR_CFG register & clear it
* when we're done
*/
#define CIA_TYPE1_SETUP(b,s,old_cfg) if((b)) { \
do { \
(s) = splhigh(); \
(old_cfg) = REGVAL(CIA_CSR_CFG); \
alpha_mb(); \
REGVAL(CIA_CSR_CFG) = (old_cfg) | 0x1; \
alpha_mb(); \
} while(0); \
}
#define CIA_TYPE1_TEARDOWN(b,s,old_cfg) if((b)) { \
do { \
alpha_mb(); \
REGVAL(CIA_CSR_CFG) = (old_cfg); \
alpha_mb(); \
splx((s)); \
} while(0); \
}
/*
* From NetBSD:
* Some (apparently-common) revisions of EB164 and AlphaStation
* firmware do the Wrong thing with PCI master and target aborts,
* which are caused by accesing the configuration space of devices
* that don't exist (for example).
*
* To work around this, we clear the CIA error register's PCI
* master and target abort bits before touching PCI configuration
* space and check it afterwards. If it indicates a master or target
* abort, the device wasn't there so we return ~0
*/
#define SWIZ_CFGREAD(b, s, f, r, width, type) do { \
type val = ~0; \
int ipl = 0; \
u_int32_t old_cfg = 0, errbits; \
vm_offset_t off = CIA_SWIZ_CFGOFF(b, s, f, r); \
vm_offset_t kv = SPARSE_##width##_ADDRESS(KV(CIA_PCI_CONF), off); \
REGVAL(CIA_CSR_CIA_ERR) = CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT; \
alpha_mb(); \
CIA_TYPE1_SETUP(b,ipl,old_cfg); \
if (!badaddr((caddr_t)kv, sizeof(type))) { \
val = SPARSE_##width##_EXTRACT(off, SPARSE_READ(kv)); \
} \
CIA_TYPE1_TEARDOWN(b,ipl,old_cfg); \
errbits = REGVAL(CIA_CSR_CIA_ERR); \
if (errbits & (CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT)) \
val = ~0; \
if (errbits) { \
REGVAL(CIA_CSR_CIA_ERR) = errbits; \
alpha_mb(); \
alpha_pal_draina(); \
} \
return val; \
} while (0)
#define SWIZ_CFGWRITE(b, s, f, r, data, width, type) do { \
int ipl = 0; \
u_int32_t old_cfg = 0; \
vm_offset_t off = CIA_SWIZ_CFGOFF(b, s, f, r); \
vm_offset_t kv = SPARSE_##width##_ADDRESS(KV(CIA_PCI_CONF), off); \
alpha_mb(); \
CIA_TYPE1_SETUP(b,ipl,old_cfg); \
if (!badaddr((caddr_t)kv, sizeof(type))) { \
SPARSE_WRITE(kv, SPARSE_##width##_INSERT(off, data)); \
alpha_wmb(); \
} \
CIA_TYPE1_TEARDOWN(b,ipl,old_cfg); \
return; \
} while (0)
static u_int32_t
cia_pcib_swiz_read_config(u_int b, u_int s, u_int f, u_int reg, int width)
{
switch (width) {
case 1:
SWIZ_CFGREAD(b, s, f, reg, BYTE, u_int8_t);
break;
case 2:
SWIZ_CFGREAD(b, s, f, reg, WORD, u_int16_t);
break;
case 4:
SWIZ_CFGREAD(b, s, f, reg, LONG, u_int32_t);
}
return ~0;
}
static void
cia_pcib_swiz_write_config(u_int b, u_int s, u_int f, u_int reg,
u_int32_t val, int width)
{
switch (width) {
case 1:
SWIZ_CFGWRITE(b, s, f, reg, val, BYTE, u_int8_t);
break;
case 2:
SWIZ_CFGWRITE(b, s, f, reg, val, WORD, u_int16_t);
break;
case 4:
SWIZ_CFGWRITE(b, s, f, reg, val, LONG, u_int32_t);
}
}
static u_int32_t
cia_pcib_bwx_read_config(u_int b, u_int s, u_int f, u_int reg, int width)
{
switch (width) {
case 1:
BWX_CFGREAD(b, s, f, reg, 1, u_int8_t, ldbu);
break;
case 2:
BWX_CFGREAD(b, s, f, reg, 2, u_int16_t, ldwu);
break;
case 4:
BWX_CFGREAD(b, s, f, reg, 4, u_int32_t, ldl);
}
return ~0;
}
static void
cia_pcib_bwx_write_config(u_int b, u_int s, u_int f, u_int reg,
u_int32_t val, u_int width)
{
switch (width) {
case 1:
BWX_CFGWRITE(b, s, f, reg, val, 1, u_int8_t, stb);
break;
case 2:
BWX_CFGWRITE(b, s, f, reg, val, 2, u_int16_t, stw);
break;
case 4:
BWX_CFGWRITE(b, s, f, reg, val, 4, u_int32_t, stl);
}
}
static int
cia_pcib_maxslots(device_t dev)
{
return 31;
}
static u_int32_t
cia_pcib_read_config(device_t dev, int b, int s, int f,
int reg, int width)
{
pcicfgregs cfg;
if ((reg == PCIR_INTLINE) && (width == 1) &&
(platform.pci_intr_map != NULL)) {
cfg.bus = b;
cfg.slot = s;
cfg.func = f;
cfg.intline = 255;
cfg.intpin =
cia_pcib_read_config(dev, b, s, f, PCIR_INTPIN, 1);
platform.pci_intr_map((void *)&cfg);
if (cfg.intline != 255)
return cfg.intline;
}
if (chipset_bwx)
return cia_pcib_bwx_read_config(b, s, f, reg, width);
else
return cia_pcib_swiz_read_config(b, s, f, reg, width);
}
static void
cia_pcib_write_config(device_t dev, int b, int s, int f,
int reg, u_int32_t val, int width)
{
if (chipset_bwx)
cia_pcib_bwx_write_config(b, s, f, reg, val, width);
else
cia_pcib_swiz_write_config(b, s, f, reg, val, width);
}
static device_method_t cia_pcib_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, cia_pcib_probe),
DEVMETHOD(device_attach, bus_generic_attach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_read_ivar, cia_pcib_read_ivar),
DEVMETHOD(bus_alloc_resource, alpha_pci_alloc_resource),
DEVMETHOD(bus_release_resource, pci_release_resource),
DEVMETHOD(bus_activate_resource, pci_activate_resource),
DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
DEVMETHOD(bus_setup_intr, alpha_platform_pci_setup_intr),
DEVMETHOD(bus_teardown_intr, alpha_platform_pci_teardown_intr),
/* alphapci interface */
DEVMETHOD(alphapci_cvt_dense, cia_pcib_cvt_dense),
DEVMETHOD(alphapci_cvt_bwx, cia_pcib_cvt_bwx),
/* pcib interface */
DEVMETHOD(pcib_maxslots, cia_pcib_maxslots),
DEVMETHOD(pcib_read_config, cia_pcib_read_config),
DEVMETHOD(pcib_write_config, cia_pcib_write_config),
DEVMETHOD(pcib_route_interrupt, alpha_pci_route_interrupt),
{ 0, 0 }
};
static driver_t cia_pcib_driver = {
"pcib",
cia_pcib_methods,
1,
};
DRIVER_MODULE(pcib, cia, cia_pcib_driver, pcib_devclass, 0, 0);