1/* $NetBSD: tsp_pci.c,v 1.12 2021/06/25 03:45:59 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by Ross Harvey.
17 * 4. The name of Ross Harvey may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
21 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34
35__KERNEL_RCSID(0, "$NetBSD: tsp_pci.c,v 1.12 2021/06/25 03:45:59 thorpej Exp $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/device.h>
41
42#include <dev/pci/pcireg.h>
43#include <dev/pci/pcivar.h>
44
45#include <machine/autoconf.h>
46#include <machine/rpb.h>
47
48#include <alpha/pci/tsreg.h>
49#include <alpha/pci/tsvar.h>
50
51#define tsp_pci() { Generate ctags(1) key. }
52
53static pcireg_t	tsp_conf_read(void *, pcitag_t, int);
54static void	tsp_conf_write(void *, pcitag_t, int, pcireg_t);
55
56void
57tsp_pci_init(pci_chipset_tag_t pc, void *v)
58{
59	pc->pc_conf_v = v;
60	pc->pc_conf_read = tsp_conf_read;
61	pc->pc_conf_write = tsp_conf_write;
62}
63
64/*
65 * Tsunami makes this a lot easier than it used to be, automatically
66 * generating type 0 or type 1 cycles, and quietly returning -1 with
67 * no errors on unanswered probes.
68 */
69static pcireg_t
70tsp_conf_read(void *cpv, pcitag_t tag, int offset)
71{
72	pcireg_t *datap, data;
73	struct tsp_config *pcp = cpv;
74
75	if ((unsigned int)offset >= PCI_CONF_SIZE)
76		return (pcireg_t) -1;
77
78	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
79	alpha_mb();
80	data = *datap;
81	alpha_mb();
82	return data;
83}
84
85static void
86tsp_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
87{
88	pcireg_t *datap;
89	struct tsp_config *pcp = cpv;
90
91	if ((unsigned int)offset >= PCI_CONF_SIZE)
92		return;
93
94	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
95	alpha_mb();
96	*datap = data;
97	alpha_mb();
98}
99
100#define NTH_STR(n, ...) ((const char *[]){ __VA_ARGS__ }[n])
101
102void
103tsp_print_error(unsigned int indent, unsigned long p_error)
104{
105	char buf[40];
106
107	if (PER_INV(p_error)) {
108		IPRINTF(indent, "data invalid\n");
109		return;
110	}
111
112	if (!PER_ERR(p_error))
113		return;
114
115	snprintb(buf, 40,
116		 "\177\20"
117		 "b\0Error lost\0"
118		 "b\1PCI SERR#\0"
119		 "b\2PCI PERR#\0"
120		 "b\3Delayed completion retry timeout\0"
121		 "b\4Invalid S/G page table entry\0"
122		 "b\5Address parity error\0"
123		 "b\6Target abort\0"
124		 "b\7PCI read data parity error\0"
125		 "b\10no PCI DEVSEL#\0"
126		 "b\11unknown\0"
127		 "b\12Uncorrectable ECC\0"
128		 "b\13Correctable ECC\0",
129		 PER_ERR(p_error));
130	IPRINTF(indent, "error    = %s\n", buf);
131
132	if (PER_ECC(p_error)) {
133		IPRINTF(indent, "address  = 0x%09lx\n", PER_SADR(p_error));
134		IPRINTF(indent, "command  = 0x%lx<%s>\n", PER_CMD(p_error),
135			NTH_STR(PER_CMD(p_error) & 0x3,
136				"DMA read", "DMA RMW", "?", "S/G read"));
137		IPRINTF(indent, "syndrome = 0x%02lx\n", PER_SYN(p_error));
138	} else {
139		IPRINTF(indent, "address  = 0x%08lx, 0x%lx<%s>\n",
140			PER_PADR(p_error), PER_TRNS(p_error),
141			NTH_STR(PER_TRNS(p_error), "No DAC", "DAC SG Win3",
142				"Monster Window", "Monster Window"));
143		IPRINTF(indent, "command  = 0x%lx<%s>\n", PER_CMD(p_error),
144			NTH_STR(PER_CMD(p_error),
145				"PCI IACK", "PCI special cycle",
146				"PCI I/O read", "PCI I/O write", "?",
147				"PCI PTP write", "PCI memory read",
148				"PCI memory write", "PCI CSR write",
149				"?", "?", "?", "?", "?", "?", "?"));
150	}
151}
152