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#include "opt_platform.h"
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/malloc.h>
34#include <sys/types.h>
35#include <sys/sysctl.h>
36#include <sys/kernel.h>
37#include <sys/rman.h>
38#include <sys/module.h>
39#include <sys/bus.h>
40#include <sys/endian.h>
41#include <sys/cpuset.h>
42
43#include <dev/ofw/openfirm.h>
44#include <dev/ofw/ofw_bus.h>
45#include <dev/ofw/ofw_bus_subr.h>
46
47#include <dev/pci/pcivar.h>
48#include <dev/pci/pcireg.h>
49#include <dev/pci/pcib_private.h>
50#include <dev/pci/pci_host_generic.h>
51
52#include <machine/intr.h>
53
54#include "thunder_pcie_common.h"
55#include "thunder_pcie_pem.h"
56
57#include "pcib_if.h"
58
59static int thunder_pem_fdt_probe(device_t);
60static int thunder_pem_fdt_alloc_msix(device_t, device_t, int *);
61static int thunder_pem_fdt_release_msix(device_t, device_t, int);
62static int thunder_pem_fdt_alloc_msi(device_t, device_t, int, int, int *);
63static int thunder_pem_fdt_release_msi(device_t, device_t, int, int *);
64static int thunder_pem_fdt_map_msi(device_t, device_t, int, uint64_t *,
65    uint32_t *);
66static int thunder_pem_fdt_get_id(device_t, device_t, enum pci_id_type,
67    uintptr_t *);
68
69static device_method_t thunder_pem_fdt_methods[] = {
70	/* Device interface */
71	DEVMETHOD(device_probe,		thunder_pem_fdt_probe),
72
73	/* pcib interface */
74	DEVMETHOD(pcib_alloc_msix,	thunder_pem_fdt_alloc_msix),
75	DEVMETHOD(pcib_release_msix,	thunder_pem_fdt_release_msix),
76	DEVMETHOD(pcib_alloc_msi,	thunder_pem_fdt_alloc_msi),
77	DEVMETHOD(pcib_release_msi,	thunder_pem_fdt_release_msi),
78	DEVMETHOD(pcib_map_msi,		thunder_pem_fdt_map_msi),
79	DEVMETHOD(pcib_get_id,		thunder_pem_fdt_get_id),
80
81	/* End */
82	DEVMETHOD_END
83};
84
85DEFINE_CLASS_1(pcib, thunder_pem_fdt_driver, thunder_pem_fdt_methods,
86    sizeof(struct thunder_pem_softc), thunder_pem_driver);
87
88DRIVER_MODULE(thunder_pem, simplebus, thunder_pem_fdt_driver, 0, 0);
89DRIVER_MODULE(thunder_pem, ofwbus, thunder_pem_fdt_driver, 0, 0);
90
91static int
92thunder_pem_fdt_probe(device_t dev)
93{
94
95	if (!ofw_bus_status_okay(dev))
96		return (ENXIO);
97
98	if (ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-pem")) {
99		device_set_desc(dev, THUNDER_PEM_DESC);
100		return (BUS_PROBE_DEFAULT);
101	}
102
103	return (ENXIO);
104}
105
106static int
107thunder_pem_fdt_alloc_msi(device_t pci, device_t child, int count, int maxcount,
108    int *irqs)
109{
110	phandle_t msi_parent;
111	int err;
112
113	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
114	    &msi_parent, NULL);
115	if (err != 0)
116		return (err);
117	return (intr_alloc_msi(pci, child, msi_parent, count, maxcount,
118	    irqs));
119}
120
121static int
122thunder_pem_fdt_release_msi(device_t pci, device_t child, int count, int *irqs)
123{
124	phandle_t msi_parent;
125	int err;
126
127	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
128	    &msi_parent, NULL);
129	if (err != 0)
130		return (err);
131	return (intr_release_msi(pci, child, msi_parent, count, irqs));
132}
133
134static int
135thunder_pem_fdt_alloc_msix(device_t pci, device_t child, int *irq)
136{
137	phandle_t msi_parent;
138	int err;
139
140	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
141	    &msi_parent, NULL);
142	if (err != 0)
143		return (err);
144	return (intr_alloc_msix(pci, child, msi_parent, irq));
145}
146
147static int
148thunder_pem_fdt_release_msix(device_t pci, device_t child, int irq)
149{
150	phandle_t msi_parent;
151	int err;
152
153	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
154	    &msi_parent, NULL);
155	if (err != 0)
156		return (err);
157	return (intr_release_msix(pci, child, msi_parent, irq));
158}
159
160static int
161thunder_pem_fdt_map_msi(device_t pci, device_t child, int irq, uint64_t *addr,
162    uint32_t *data)
163{
164	phandle_t msi_parent;
165	int err;
166
167	err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
168	    &msi_parent, NULL);
169	if (err != 0)
170		return (err);
171	return (intr_map_msi(pci, child, msi_parent, irq, addr, data));
172}
173
174static int
175thunder_pem_fdt_get_id(device_t dev, device_t child, enum pci_id_type type,
176    uintptr_t *id)
177{
178	phandle_t node;
179	int err;
180	uint32_t rid;
181	uint16_t pci_rid;
182
183	if (type != PCI_ID_MSI)
184		return (pcib_get_id(dev, child, type, id));
185
186	node = ofw_bus_get_node(dev);
187	pci_rid = pci_get_rid(child);
188
189	err = ofw_bus_msimap(node, pci_rid, NULL, &rid);
190	if (err != 0)
191		return (err);
192	*id = rid;
193
194	return (0);
195}
196