605f564f52
- Add PCI Extended Configuration Space support into x86. - Check register offset of pci_conf_read() in MD part. It returns (pcireg_t)-1 if it isn't accessible. - Decode Extended Capability in PCI Extended Configuration Space. Currently the following extended capabilities are decoded: - Advanced Error Reporting - Virtual Channel - Device Serial Number - Power Budgeting - Root Complex Link Declaration - Root Complex Event Collector Association - Access Control Services - Alternative Routing-ID Interpretation - Address Translation Services - Single Root IO Virtualization - Page Request - TPH Requester - Latency Tolerance Reporting - Secondary PCI Express - Process Address Space ID - LN Requester - L1 PM Substates The following extended capabilities are not decoded yet: - Root Complex Internal Link Control - Multi-Function Virtual Channel - RCRB Header - Vendor Unique - Configuration Access Correction - Multiple Root IO Virtualization - Multicast - Resizable BAR - Dynamic Power Allocation - Protocol Multiplexing - Downstream Port Containment - Precision Time Management - M-PCIe - Function Reading Status Queueing - Readiness Time Reporting - Designated Vendor-Specific
258 lines
6.2 KiB
C
258 lines
6.2 KiB
C
/* $NetBSD: cia_pci.c,v 1.33 2015/10/02 05:22:49 msaitoh Exp $ */
|
|
|
|
/*
|
|
* 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> /* RCS ID & Copyright macro defns */
|
|
|
|
__KERNEL_RCSID(0, "$NetBSD: cia_pci.c,v 1.33 2015/10/02 05:22:49 msaitoh Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <dev/pci/pcireg.h>
|
|
#include <dev/pci/pcivar.h>
|
|
#include <alpha/pci/ciareg.h>
|
|
#include <alpha/pci/ciavar.h>
|
|
|
|
void cia_attach_hook(device_t, device_t,
|
|
struct pcibus_attach_args *);
|
|
int cia_bus_maxdevs(void *, int);
|
|
pcitag_t cia_make_tag(void *, int, int, int);
|
|
void cia_decompose_tag(void *, pcitag_t, int *, int *, int *);
|
|
pcireg_t cia_conf_read(void *, pcitag_t, int);
|
|
void cia_conf_write(void *, pcitag_t, int, pcireg_t);
|
|
|
|
void
|
|
cia_pci_init(pci_chipset_tag_t pc, void *v)
|
|
{
|
|
|
|
pc->pc_conf_v = v;
|
|
pc->pc_attach_hook = cia_attach_hook;
|
|
pc->pc_bus_maxdevs = cia_bus_maxdevs;
|
|
pc->pc_make_tag = cia_make_tag;
|
|
pc->pc_decompose_tag = cia_decompose_tag;
|
|
pc->pc_conf_read = cia_conf_read;
|
|
pc->pc_conf_write = cia_conf_write;
|
|
}
|
|
|
|
void
|
|
cia_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba)
|
|
{
|
|
}
|
|
|
|
int
|
|
cia_bus_maxdevs(void *cpv, int busno)
|
|
{
|
|
|
|
return 32;
|
|
}
|
|
|
|
pcitag_t
|
|
cia_make_tag(void *cpv, int b, int d, int f)
|
|
{
|
|
|
|
return (b << 16) | (d << 11) | (f << 8);
|
|
}
|
|
|
|
void
|
|
cia_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp)
|
|
{
|
|
|
|
if (bp != NULL)
|
|
*bp = (tag >> 16) & 0xff;
|
|
if (dp != NULL)
|
|
*dp = (tag >> 11) & 0x1f;
|
|
if (fp != NULL)
|
|
*fp = (tag >> 8) & 0x7;
|
|
}
|
|
|
|
pcireg_t
|
|
cia_conf_read(void *cpv, pcitag_t tag, int offset)
|
|
{
|
|
struct cia_config *ccp = cpv;
|
|
pcireg_t *datap, data;
|
|
int s, secondary, ba;
|
|
uint32_t old_cfg, errbits;
|
|
|
|
if ((unsigned int)offset >= PCI_CONF_SIZE)
|
|
return (pcireg_t) -1;
|
|
|
|
#ifdef __GNUC__
|
|
s = 0; /* XXX gcc -Wuninitialized */
|
|
old_cfg = 0; /* XXX gcc -Wuninitialized */
|
|
#endif
|
|
|
|
/*
|
|
* 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();
|
|
|
|
/* secondary if bus # != 0 */
|
|
pci_decompose_tag(&ccp->cc_pc, tag, &secondary, 0, 0);
|
|
if (secondary) {
|
|
s = splhigh();
|
|
old_cfg = REGVAL(CIA_CSR_CFG);
|
|
alpha_mb();
|
|
REGVAL(CIA_CSR_CFG) = old_cfg | 0x1;
|
|
alpha_mb();
|
|
}
|
|
|
|
/*
|
|
* We just inline the BWX support, since this is the only
|
|
* difference between BWX and swiz for config space.
|
|
*/
|
|
if (ccp->cc_flags & CCF_PCI_USE_BWX) {
|
|
if (secondary) {
|
|
datap =
|
|
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF1 |
|
|
tag | (offset & ~0x03));
|
|
} else {
|
|
datap =
|
|
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF0 |
|
|
tag | (offset & ~0x03));
|
|
}
|
|
} else {
|
|
datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_PCI_CONF |
|
|
tag << 5UL | /* XXX */
|
|
(offset & ~0x03) << 5 | /* XXX */
|
|
0 << 5 | /* XXX */
|
|
0x3 << 3); /* XXX */
|
|
}
|
|
data = (pcireg_t)-1;
|
|
alpha_mb();
|
|
if (!(ba = badaddr(datap, sizeof *datap)))
|
|
data = *datap;
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
if (secondary) {
|
|
alpha_mb();
|
|
REGVAL(CIA_CSR_CFG) = old_cfg;
|
|
alpha_mb();
|
|
splx(s);
|
|
}
|
|
|
|
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;
|
|
data = 0xffffffff;
|
|
}
|
|
|
|
if (errbits) {
|
|
REGVAL(CIA_CSR_CIA_ERR) = errbits;
|
|
alpha_mb();
|
|
alpha_pal_draina();
|
|
}
|
|
|
|
#if 0
|
|
printf("cia_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg,
|
|
data, datap, ba ? " (badaddr)" : "");
|
|
#endif
|
|
|
|
return data;
|
|
}
|
|
|
|
void
|
|
cia_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
|
|
{
|
|
struct cia_config *ccp = cpv;
|
|
pcireg_t *datap;
|
|
int s, secondary;
|
|
uint32_t old_cfg;
|
|
|
|
if ((unsigned int)offset >= PCI_CONF_SIZE)
|
|
return;
|
|
|
|
#ifdef __GNUC__
|
|
s = 0; /* XXX gcc -Wuninitialized */
|
|
old_cfg = 0; /* XXX gcc -Wuninitialized */
|
|
#endif
|
|
|
|
/* secondary if bus # != 0 */
|
|
pci_decompose_tag(&ccp->cc_pc, tag, &secondary, 0, 0);
|
|
if (secondary) {
|
|
s = splhigh();
|
|
old_cfg = REGVAL(CIA_CSR_CFG);
|
|
alpha_mb();
|
|
REGVAL(CIA_CSR_CFG) = old_cfg | 0x1;
|
|
alpha_mb();
|
|
}
|
|
|
|
/*
|
|
* We just inline the BWX support, since this is the only
|
|
* difference between BWX and swiz for config space.
|
|
*/
|
|
if (ccp->cc_flags & CCF_PCI_USE_BWX) {
|
|
if (secondary) {
|
|
datap =
|
|
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF1 |
|
|
tag | (offset & ~0x03));
|
|
} else {
|
|
datap =
|
|
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF0 |
|
|
tag | (offset & ~0x03));
|
|
}
|
|
} else {
|
|
datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_PCI_CONF |
|
|
tag << 5UL | /* XXX */
|
|
(offset & ~0x03) << 5 | /* XXX */
|
|
0 << 5 | /* XXX */
|
|
0x3 << 3); /* XXX */
|
|
}
|
|
alpha_mb();
|
|
*datap = data;
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
if (secondary) {
|
|
alpha_mb();
|
|
REGVAL(CIA_CSR_CFG) = old_cfg;
|
|
alpha_mb();
|
|
splx(s);
|
|
}
|
|
|
|
#if 0
|
|
printf("cia_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag,
|
|
reg, data, datap);
|
|
#endif
|
|
}
|