1/*
2 * Copyright (C) 2016 Cavium Inc.
3 * All rights reserved.
4 *
5 * Developed by Semihalf.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28#include "opt_platform.h"
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/malloc.h>
36#include <sys/types.h>
37#include <sys/sysctl.h>
38#include <sys/kernel.h>
39#include <sys/rman.h>
40#include <sys/module.h>
41#include <sys/bus.h>
42#include <sys/endian.h>
43#include <sys/cpuset.h>
44
45#include <dev/ofw/openfirm.h>
46#include <dev/ofw/ofw_bus.h>
47#include <dev/ofw/ofw_bus_subr.h>
48
49#include <dev/pci/pcireg.h>
50#include <dev/pci/pcivar.h>
51#include <dev/pci/pci_host_generic.h>
52#include <dev/pci/pcib_private.h>
53
54#include "thunder_pcie_common.h"
55
56#include "pcib_if.h"
57
58#ifdef THUNDERX_PASS_1_1_ERRATA
59static struct resource * thunder_pcie_fdt_alloc_resource(device_t, device_t,
60    int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
61#endif
62static int thunder_pcie_fdt_attach(device_t);
63static int thunder_pcie_fdt_probe(device_t);
64static int thunder_pcie_fdt_get_id(device_t, device_t, enum pci_id_type,
65    uintptr_t *);
66
67static device_method_t thunder_pcie_fdt_methods[] = {
68	/* Device interface */
69	DEVMETHOD(device_probe,		thunder_pcie_fdt_probe),
70	DEVMETHOD(device_attach,	thunder_pcie_fdt_attach),
71#ifdef THUNDERX_PASS_1_1_ERRATA
72	DEVMETHOD(bus_alloc_resource,	thunder_pcie_fdt_alloc_resource),
73#endif
74
75	/* pcib interface */
76	DEVMETHOD(pcib_get_id,		thunder_pcie_fdt_get_id),
77
78	/* End */
79	DEVMETHOD_END
80};
81
82DEFINE_CLASS_1(pcib, thunder_pcie_fdt_driver, thunder_pcie_fdt_methods,
83    sizeof(struct generic_pcie_softc), generic_pcie_driver);
84
85static devclass_t thunder_pcie_fdt_devclass;
86
87DRIVER_MODULE(thunder_pcib, simplebus, thunder_pcie_fdt_driver,
88    thunder_pcie_fdt_devclass, 0, 0);
89DRIVER_MODULE(thunder_pcib, ofwbus, thunder_pcie_fdt_driver,
90    thunder_pcie_fdt_devclass, 0, 0);
91
92
93static int
94thunder_pcie_fdt_probe(device_t dev)
95{
96
97	/* Check if we're running on Cavium ThunderX */
98	if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
99	    CPU_IMPL_CAVIUM, CPU_PART_THUNDER, 0, 0))
100		return (ENXIO);
101
102	if (!ofw_bus_status_okay(dev))
103		return (ENXIO);
104
105	if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic") ||
106	    ofw_bus_is_compatible(dev, "cavium,thunder-pcie") ||
107	    ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-ecam")) {
108		device_set_desc(dev, "Cavium Integrated PCI/PCI-E Controller");
109		return (BUS_PROBE_DEFAULT);
110	}
111
112	return (ENXIO);
113}
114
115static int
116thunder_pcie_fdt_attach(device_t dev)
117{
118	struct generic_pcie_softc *sc;
119
120	sc = device_get_softc(dev);
121	thunder_pcie_identify_ecam(dev, &sc->ecam);
122	sc->coherent = 1;
123
124	return (pci_host_generic_attach(dev));
125}
126
127static int
128thunder_pcie_fdt_get_id(device_t pci, device_t child, enum pci_id_type type,
129    uintptr_t *id)
130{
131	phandle_t node;
132	int bsf;
133
134	if (type != PCI_ID_MSI)
135		return (pcib_get_id(pci, child, type, id));
136
137	node = ofw_bus_get_node(pci);
138	if (OF_hasprop(node, "msi-map"))
139		return (generic_pcie_get_id(pci, child, type, id));
140
141	bsf = pci_get_rid(child);
142	*id = (pci_get_domain(child) << PCI_RID_DOMAIN_SHIFT) | bsf;
143
144	return (0);
145}
146
147#ifdef THUNDERX_PASS_1_1_ERRATA
148static struct resource *
149thunder_pcie_fdt_alloc_resource(device_t dev, device_t child, int type, int *rid,
150    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
151{
152
153	if ((int)ofw_bus_get_node(child) > 0)
154		return (pci_host_generic_alloc_resource(dev, child,
155		    type, rid, start, end, count, flags));
156
157	return (thunder_pcie_alloc_resource(dev, child,
158	    type, rid, start, end, count, flags));
159}
160#endif
161