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 <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include "opt_platform.h"
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/pcivar.h>
50#include <dev/pci/pcireg.h>
51#include <dev/pci/pcib_private.h>
52#include <dev/pci/pci_host_generic.h>
53
54#include <machine/intr.h>
55
56#include "thunder_pcie_common.h"
57#include "thunder_pcie_pem.h"
58
59#include "pcib_if.h"
60
61static int thunder_pem_fdt_probe(device_t);
62static int thunder_pem_fdt_alloc_msix(device_t, device_t, int *);
63static int thunder_pem_fdt_release_msix(device_t, device_t, int);
64static int thunder_pem_fdt_alloc_msi(device_t, device_t, int, int, int *);
65static int thunder_pem_fdt_release_msi(device_t, device_t, int, int *);
66static int thunder_pem_fdt_map_msi(device_t, device_t, int, uint64_t *,
67    uint32_t *);
68static int thunder_pem_fdt_get_id(device_t, device_t, enum pci_id_type,
69    uintptr_t *);
70
71static device_method_t thunder_pem_fdt_methods[] = {
72	/* Device interface */
73	DEVMETHOD(device_probe,		thunder_pem_fdt_probe),
74
75	/* pcib interface */
76	DEVMETHOD(pcib_alloc_msix,	thunder_pem_fdt_alloc_msix),
77	DEVMETHOD(pcib_release_msix,	thunder_pem_fdt_release_msix),
78	DEVMETHOD(pcib_alloc_msi,	thunder_pem_fdt_alloc_msi),
79	DEVMETHOD(pcib_release_msi,	thunder_pem_fdt_release_msi),
80	DEVMETHOD(pcib_map_msi,		thunder_pem_fdt_map_msi),
81	DEVMETHOD(pcib_get_id,		thunder_pem_fdt_get_id),
82
83	/* End */
84	DEVMETHOD_END
85};
86
87DEFINE_CLASS_1(pcib, thunder_pem_fdt_driver, thunder_pem_fdt_methods,
88    sizeof(struct thunder_pem_softc), thunder_pem_driver);
89
90static devclass_t thunder_pem_fdt_devclass;
91
92DRIVER_MODULE(thunder_pem, simplebus, thunder_pem_fdt_driver,
93    thunder_pem_fdt_devclass, 0, 0);
94DRIVER_MODULE(thunder_pem, ofwbus, thunder_pem_fdt_driver,
95    thunder_pem_fdt_devclass, 0, 0);
96
97static int
98thunder_pem_fdt_probe(device_t dev)
99{
100
101	if (!ofw_bus_status_okay(dev))
102		return (ENXIO);
103
104	if (ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-pem")) {
105		device_set_desc(dev, THUNDER_PEM_DESC);
106		return (BUS_PROBE_DEFAULT);
107	}
108
109	return (ENXIO);
110}
111
112static int
113thunder_pem_fdt_alloc_msi(device_t pci, device_t child, int count, int maxcount,
114    int *irqs)
115{
116	phandle_t msi_parent;
117	int err;
118
119	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
120	    &msi_parent, NULL);
121	if (err != 0)
122		return (err);
123	return (intr_alloc_msi(pci, child, msi_parent, count, maxcount,
124	    irqs));
125}
126
127static int
128thunder_pem_fdt_release_msi(device_t pci, device_t child, int count, int *irqs)
129{
130	phandle_t msi_parent;
131	int err;
132
133	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
134	    &msi_parent, NULL);
135	if (err != 0)
136		return (err);
137	return (intr_release_msi(pci, child, msi_parent, count, irqs));
138}
139
140static int
141thunder_pem_fdt_alloc_msix(device_t pci, device_t child, int *irq)
142{
143	phandle_t msi_parent;
144	int err;
145
146	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
147	    &msi_parent, NULL);
148	if (err != 0)
149		return (err);
150	return (intr_alloc_msix(pci, child, msi_parent, irq));
151}
152
153static int
154thunder_pem_fdt_release_msix(device_t pci, device_t child, int irq)
155{
156	phandle_t msi_parent;
157	int err;
158
159	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
160	    &msi_parent, NULL);
161	if (err != 0)
162		return (err);
163	return (intr_release_msix(pci, child, msi_parent, irq));
164}
165
166static int
167thunder_pem_fdt_map_msi(device_t pci, device_t child, int irq, uint64_t *addr,
168    uint32_t *data)
169{
170	phandle_t msi_parent;
171	int err;
172
173	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
174	    &msi_parent, NULL);
175	if (err != 0)
176		return (err);
177	return (intr_map_msi(pci, child, msi_parent, irq, addr, data));
178}
179
180static int
181thunder_pem_fdt_get_id(device_t dev, device_t child, enum pci_id_type type,
182    uintptr_t *id)
183{
184	phandle_t node;
185	int err;
186	uint32_t rid;
187	uint16_t pci_rid;
188
189	if (type != PCI_ID_MSI)
190		return (pcib_get_id(dev, child, type, id));
191
192	node = ofw_bus_get_node(dev);
193	pci_rid = pci_get_rid(child);
194
195	err = ofw_bus_msimap(node, pci_rid, NULL, &rid);
196	if (err != 0)
197		return (err);
198	*id = rid;
199
200	return (0);
201}
202