1 /*-
2 * Copyright (c) 2015 Mellanox Technologies, Ltd.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * 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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/kernel.h>
34 #include <sys/sysctl.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/bus.h>
38 #include <sys/fcntl.h>
39 #include <sys/file.h>
40 #include <sys/filio.h>
41 #include <sys/rwlock.h>
42
43 #include <vm/vm.h>
44 #include <vm/pmap.h>
45
46 #include <machine/stdarg.h>
47 #include <machine/pmap.h>
48
49 #include <linux/kobject.h>
50 #include <linux/device.h>
51 #include <linux/slab.h>
52 #include <linux/module.h>
53 #include <linux/cdev.h>
54 #include <linux/file.h>
55 #include <linux/sysfs.h>
56 #include <linux/mm.h>
57 #include <linux/io.h>
58 #include <linux/vmalloc.h>
59 #include <linux/pci.h>
60
61 static device_probe_t linux_pci_probe;
62 static device_attach_t linux_pci_attach;
63 static device_detach_t linux_pci_detach;
64
65 static device_method_t pci_methods[] = {
66 DEVMETHOD(device_probe, linux_pci_probe),
67 DEVMETHOD(device_attach, linux_pci_attach),
68 DEVMETHOD(device_detach, linux_pci_detach),
69 DEVMETHOD_END
70 };
71
72 static struct pci_driver *
linux_pci_find(device_t dev,const struct pci_device_id ** idp)73 linux_pci_find(device_t dev, const struct pci_device_id **idp)
74 {
75 const struct pci_device_id *id;
76 struct pci_driver *pdrv;
77 uint16_t vendor;
78 uint16_t device;
79
80 vendor = pci_get_vendor(dev);
81 device = pci_get_device(dev);
82
83 spin_lock(&pci_lock);
84 list_for_each_entry(pdrv, &pci_drivers, links) {
85 for (id = pdrv->id_table; id->vendor != 0; id++) {
86 if (vendor == id->vendor && device == id->device) {
87 *idp = id;
88 spin_unlock(&pci_lock);
89 return (pdrv);
90 }
91 }
92 }
93 spin_unlock(&pci_lock);
94 return (NULL);
95 }
96
97 static int
linux_pci_probe(device_t dev)98 linux_pci_probe(device_t dev)
99 {
100 const struct pci_device_id *id;
101 struct pci_driver *pdrv;
102
103 if ((pdrv = linux_pci_find(dev, &id)) == NULL)
104 return (ENXIO);
105 if (device_get_driver(dev) != &pdrv->driver)
106 return (ENXIO);
107 device_set_desc(dev, pdrv->name);
108 return (0);
109 }
110
111 static int
linux_pci_attach(device_t dev)112 linux_pci_attach(device_t dev)
113 {
114 struct resource_list_entry *rle;
115 struct pci_dev *pdev;
116 struct pci_driver *pdrv;
117 const struct pci_device_id *id;
118 int error;
119
120 pdrv = linux_pci_find(dev, &id);
121 pdev = device_get_softc(dev);
122 pdev->dev.parent = &linux_root_device;
123 pdev->dev.bsddev = dev;
124 INIT_LIST_HEAD(&pdev->dev.irqents);
125 pdev->device = id->device;
126 pdev->vendor = id->vendor;
127 pdev->dev.dma_mask = &pdev->dma_mask;
128 pdev->pdrv = pdrv;
129 kobject_init(&pdev->dev.kobj, &linux_dev_ktype);
130 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev));
131 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj,
132 kobject_name(&pdev->dev.kobj));
133 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 0);
134 if (rle)
135 pdev->dev.irq = rle->start;
136 else
137 pdev->dev.irq = 0;
138 pdev->irq = pdev->dev.irq;
139 mtx_unlock(&Giant);
140 spin_lock(&pci_lock);
141 list_add(&pdev->links, &pci_devices);
142 spin_unlock(&pci_lock);
143 error = pdrv->probe(pdev, id);
144 mtx_lock(&Giant);
145 if (error) {
146 spin_lock(&pci_lock);
147 list_del(&pdev->links);
148 spin_unlock(&pci_lock);
149 put_device(&pdev->dev);
150 return (-error);
151 }
152 return (0);
153 }
154
155 static int
linux_pci_detach(device_t dev)156 linux_pci_detach(device_t dev)
157 {
158 struct pci_dev *pdev;
159
160 pdev = device_get_softc(dev);
161 mtx_unlock(&Giant);
162 pdev->pdrv->remove(pdev);
163 mtx_lock(&Giant);
164 spin_lock(&pci_lock);
165 list_del(&pdev->links);
166 spin_unlock(&pci_lock);
167 put_device(&pdev->dev);
168
169 return (0);
170 }
171
172 int
pci_register_driver(struct pci_driver * pdrv)173 pci_register_driver(struct pci_driver *pdrv)
174 {
175 devclass_t bus;
176 int error = 0;
177
178 bus = devclass_find("pci");
179
180 spin_lock(&pci_lock);
181 list_add(&pdrv->links, &pci_drivers);
182 spin_unlock(&pci_lock);
183 pdrv->driver.name = pdrv->name;
184 pdrv->driver.methods = pci_methods;
185 pdrv->driver.size = sizeof(struct pci_dev);
186 mtx_lock(&Giant);
187 if (bus != NULL) {
188 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT,
189 &pdrv->bsdclass);
190 }
191 mtx_unlock(&Giant);
192 return (-error);
193 }
194
195 void
pci_unregister_driver(struct pci_driver * pdrv)196 pci_unregister_driver(struct pci_driver *pdrv)
197 {
198 devclass_t bus;
199
200 bus = devclass_find("pci");
201
202 list_del(&pdrv->links);
203 mtx_lock(&Giant);
204 if (bus != NULL)
205 devclass_delete_driver(bus, &pdrv->driver);
206 mtx_unlock(&Giant);
207 }
208
209