17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
217c478bd9Sstevel@tonic-gate */
227c478bd9Sstevel@tonic-gate /*
23c88420b3Sdmick * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
27*1636e047SRobert Mustacchi /*
28*1636e047SRobert Mustacchi * Copyright 2021 Oxide Computer Company
29*1636e047SRobert Mustacchi */
307c478bd9Sstevel@tonic-gate
317c478bd9Sstevel@tonic-gate /*
327c478bd9Sstevel@tonic-gate * PCI Mechanism 1 low-level routines
337c478bd9Sstevel@tonic-gate */
347c478bd9Sstevel@tonic-gate
357c478bd9Sstevel@tonic-gate #include <sys/types.h>
367c478bd9Sstevel@tonic-gate #include <sys/pci.h>
377c478bd9Sstevel@tonic-gate #include <sys/pci_impl.h>
387c478bd9Sstevel@tonic-gate #include <sys/sunddi.h>
39c88420b3Sdmick #include <sys/pci_cfgspace_impl.h>
407c478bd9Sstevel@tonic-gate
417c478bd9Sstevel@tonic-gate /*
427c478bd9Sstevel@tonic-gate * Per PCI 2.1 section 3.7.4.1 and PCI-PCI Bridge Architecture 1.0 section
437c478bd9Sstevel@tonic-gate * 5.3.1.2: dev=31 func=7 reg=0 means a special cycle. We don't want to
447c478bd9Sstevel@tonic-gate * trigger that by accident, so we pretend that dev 31, func 7 doesn't
457c478bd9Sstevel@tonic-gate * exist. If we ever want special cycle support, we'll add explicit
467c478bd9Sstevel@tonic-gate * special cycle support.
477c478bd9Sstevel@tonic-gate */
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate uint8_t
pci_mech1_getb(int bus,int device,int function,int reg)507c478bd9Sstevel@tonic-gate pci_mech1_getb(int bus, int device, int function, int reg)
517c478bd9Sstevel@tonic-gate {
527c478bd9Sstevel@tonic-gate uint8_t val;
537c478bd9Sstevel@tonic-gate if (device == PCI_MECH1_SPEC_CYCLE_DEV &&
547c478bd9Sstevel@tonic-gate function == PCI_MECH1_SPEC_CYCLE_FUNC) {
55*1636e047SRobert Mustacchi return (PCI_EINVAL8);
56*1636e047SRobert Mustacchi }
57*1636e047SRobert Mustacchi
58*1636e047SRobert Mustacchi if (reg > pci_iocfg_max_offset) {
59*1636e047SRobert Mustacchi return (PCI_EINVAL8);
607c478bd9Sstevel@tonic-gate }
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate mutex_enter(&pcicfg_mutex);
637c478bd9Sstevel@tonic-gate outl(PCI_CONFADD, PCI_CADDR1(bus, device, function, reg));
647c478bd9Sstevel@tonic-gate val = inb(PCI_CONFDATA | (reg & 0x3));
657c478bd9Sstevel@tonic-gate mutex_exit(&pcicfg_mutex);
667c478bd9Sstevel@tonic-gate return (val);
677c478bd9Sstevel@tonic-gate }
687c478bd9Sstevel@tonic-gate
697c478bd9Sstevel@tonic-gate uint16_t
pci_mech1_getw(int bus,int device,int function,int reg)707c478bd9Sstevel@tonic-gate pci_mech1_getw(int bus, int device, int function, int reg)
717c478bd9Sstevel@tonic-gate {
727c478bd9Sstevel@tonic-gate uint16_t val;
737c478bd9Sstevel@tonic-gate
747c478bd9Sstevel@tonic-gate if (device == PCI_MECH1_SPEC_CYCLE_DEV &&
757c478bd9Sstevel@tonic-gate function == PCI_MECH1_SPEC_CYCLE_FUNC) {
76*1636e047SRobert Mustacchi return (PCI_EINVAL16);
77*1636e047SRobert Mustacchi }
78*1636e047SRobert Mustacchi
79*1636e047SRobert Mustacchi if (reg > pci_iocfg_max_offset) {
80*1636e047SRobert Mustacchi return (PCI_EINVAL16);
817c478bd9Sstevel@tonic-gate }
827c478bd9Sstevel@tonic-gate
837c478bd9Sstevel@tonic-gate mutex_enter(&pcicfg_mutex);
847c478bd9Sstevel@tonic-gate outl(PCI_CONFADD, PCI_CADDR1(bus, device, function, reg));
857c478bd9Sstevel@tonic-gate val = inw(PCI_CONFDATA | (reg & 0x2));
867c478bd9Sstevel@tonic-gate mutex_exit(&pcicfg_mutex);
877c478bd9Sstevel@tonic-gate return (val);
887c478bd9Sstevel@tonic-gate }
897c478bd9Sstevel@tonic-gate
907c478bd9Sstevel@tonic-gate uint32_t
pci_mech1_getl(int bus,int device,int function,int reg)917c478bd9Sstevel@tonic-gate pci_mech1_getl(int bus, int device, int function, int reg)
927c478bd9Sstevel@tonic-gate {
937c478bd9Sstevel@tonic-gate uint32_t val;
947c478bd9Sstevel@tonic-gate
957c478bd9Sstevel@tonic-gate if (device == PCI_MECH1_SPEC_CYCLE_DEV &&
967c478bd9Sstevel@tonic-gate function == PCI_MECH1_SPEC_CYCLE_FUNC) {
97*1636e047SRobert Mustacchi return (PCI_EINVAL32);
98*1636e047SRobert Mustacchi }
99*1636e047SRobert Mustacchi
100*1636e047SRobert Mustacchi if (reg > pci_iocfg_max_offset) {
101*1636e047SRobert Mustacchi return (PCI_EINVAL32);
1027c478bd9Sstevel@tonic-gate }
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate mutex_enter(&pcicfg_mutex);
1057c478bd9Sstevel@tonic-gate outl(PCI_CONFADD, PCI_CADDR1(bus, device, function, reg));
1067c478bd9Sstevel@tonic-gate val = inl(PCI_CONFDATA);
1077c478bd9Sstevel@tonic-gate mutex_exit(&pcicfg_mutex);
1087c478bd9Sstevel@tonic-gate return (val);
1097c478bd9Sstevel@tonic-gate }
1107c478bd9Sstevel@tonic-gate
1117c478bd9Sstevel@tonic-gate void
pci_mech1_putb(int bus,int device,int function,int reg,uint8_t val)1127c478bd9Sstevel@tonic-gate pci_mech1_putb(int bus, int device, int function, int reg, uint8_t val)
1137c478bd9Sstevel@tonic-gate {
1147c478bd9Sstevel@tonic-gate if (device == PCI_MECH1_SPEC_CYCLE_DEV &&
1157c478bd9Sstevel@tonic-gate function == PCI_MECH1_SPEC_CYCLE_FUNC) {
1167c478bd9Sstevel@tonic-gate return;
1177c478bd9Sstevel@tonic-gate }
1187c478bd9Sstevel@tonic-gate
119*1636e047SRobert Mustacchi if (reg > pci_iocfg_max_offset) {
120*1636e047SRobert Mustacchi return;
121*1636e047SRobert Mustacchi }
122*1636e047SRobert Mustacchi
1237c478bd9Sstevel@tonic-gate mutex_enter(&pcicfg_mutex);
1247c478bd9Sstevel@tonic-gate outl(PCI_CONFADD, PCI_CADDR1(bus, device, function, reg));
1257c478bd9Sstevel@tonic-gate outb(PCI_CONFDATA | (reg & 0x3), val);
1267c478bd9Sstevel@tonic-gate mutex_exit(&pcicfg_mutex);
1277c478bd9Sstevel@tonic-gate }
1287c478bd9Sstevel@tonic-gate
1297c478bd9Sstevel@tonic-gate void
pci_mech1_putw(int bus,int device,int function,int reg,uint16_t val)1307c478bd9Sstevel@tonic-gate pci_mech1_putw(int bus, int device, int function, int reg, uint16_t val)
1317c478bd9Sstevel@tonic-gate {
1327c478bd9Sstevel@tonic-gate if (device == PCI_MECH1_SPEC_CYCLE_DEV &&
1337c478bd9Sstevel@tonic-gate function == PCI_MECH1_SPEC_CYCLE_FUNC) {
1347c478bd9Sstevel@tonic-gate return;
1357c478bd9Sstevel@tonic-gate }
1367c478bd9Sstevel@tonic-gate
137*1636e047SRobert Mustacchi if (reg > pci_iocfg_max_offset) {
138*1636e047SRobert Mustacchi return;
139*1636e047SRobert Mustacchi }
140*1636e047SRobert Mustacchi
1417c478bd9Sstevel@tonic-gate mutex_enter(&pcicfg_mutex);
1427c478bd9Sstevel@tonic-gate outl(PCI_CONFADD, PCI_CADDR1(bus, device, function, reg));
1437c478bd9Sstevel@tonic-gate outw(PCI_CONFDATA | (reg & 0x2), val);
1447c478bd9Sstevel@tonic-gate mutex_exit(&pcicfg_mutex);
1457c478bd9Sstevel@tonic-gate }
1467c478bd9Sstevel@tonic-gate
1477c478bd9Sstevel@tonic-gate void
pci_mech1_putl(int bus,int device,int function,int reg,uint32_t val)1487c478bd9Sstevel@tonic-gate pci_mech1_putl(int bus, int device, int function, int reg, uint32_t val)
1497c478bd9Sstevel@tonic-gate {
1507c478bd9Sstevel@tonic-gate if (device == PCI_MECH1_SPEC_CYCLE_DEV &&
1517c478bd9Sstevel@tonic-gate function == PCI_MECH1_SPEC_CYCLE_FUNC) {
1527c478bd9Sstevel@tonic-gate return;
1537c478bd9Sstevel@tonic-gate }
1547c478bd9Sstevel@tonic-gate
155*1636e047SRobert Mustacchi if (reg > pci_iocfg_max_offset) {
156*1636e047SRobert Mustacchi return;
157*1636e047SRobert Mustacchi }
158*1636e047SRobert Mustacchi
1597c478bd9Sstevel@tonic-gate mutex_enter(&pcicfg_mutex);
1607c478bd9Sstevel@tonic-gate outl(PCI_CONFADD, PCI_CADDR1(bus, device, function, reg));
1617c478bd9Sstevel@tonic-gate outl(PCI_CONFDATA, val);
1627c478bd9Sstevel@tonic-gate mutex_exit(&pcicfg_mutex);
1637c478bd9Sstevel@tonic-gate }
164