1 /* $NetBSD: rumpdev_pci.c,v 1.5 2015/05/17 13:51:31 pooka Exp $ */
2
3 /*
4 * Copyright (c) 2013 Antti Kantee. 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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: rumpdev_pci.c,v 1.5 2015/05/17 13:51:31 pooka Exp $");
30
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/atomic.h>
34
35 #include <dev/pci/pcivar.h>
36
37 #include "pci_user.h"
38
39 void
pci_attach_hook(device_t parent,device_t self,struct pcibus_attach_args * pba)40 pci_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba)
41 {
42
43 /* nada */
44 }
45
46 int
pci_bus_maxdevs(pci_chipset_tag_t pc,int busno)47 pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
48 {
49
50 return 32;
51 }
52
53 pcitag_t
pci_make_tag(pci_chipset_tag_t pc,int bus,int device,int function)54 pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function)
55 {
56 pcitag_t pt;
57 int *tag;
58 unsigned csr;
59 int rv;
60
61 CTASSERT(sizeof(pt) >= sizeof(int));
62
63 /* a "bit" ugly, but keeps us MI */
64 tag = (int *)&pt;
65 *tag = (bus << 16) | (device << 8) | (function << 0);
66
67 /*
68 * On Xen, we need to enable the device io/mem space.
69 * Doesn't really belong here, but we need to do it somewhere.
70 */
71 rv = rumpcomp_pci_confread(bus, device, function,
72 PCI_COMMAND_STATUS_REG, &csr);
73 if (rv == 0 && (csr & PCI_COMMAND_MEM_ENABLE) == 0) {
74 rumpcomp_pci_confwrite(bus, device, function,
75 PCI_COMMAND_STATUS_REG, csr | PCI_COMMAND_MEM_ENABLE);
76 }
77
78 return pt;
79 }
80
81 pcireg_t
pci_conf_read(pci_chipset_tag_t pc,pcitag_t tag,int reg)82 pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
83 {
84 unsigned int rv;
85 int bus, device, fun;
86
87 pci_decompose_tag(pc, tag, &bus, &device, &fun);
88 rumpcomp_pci_confread(bus, device, fun, reg, &rv);
89 return rv;
90 }
91
92 void
pci_conf_write(pci_chipset_tag_t pc,pcitag_t tag,int reg,pcireg_t data)93 pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data)
94 {
95 int bus, device, fun;
96
97 pci_decompose_tag(pc, tag, &bus, &device, &fun);
98 rumpcomp_pci_confwrite(bus, device, fun, reg, data);
99 }
100
101 void
pci_decompose_tag(pci_chipset_tag_t pc,pcitag_t tag,int * bp,int * dp,int * fp)102 pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag,
103 int *bp, int *dp, int *fp)
104 {
105 int *t = (int *)&tag;
106
107 *bp = (*t >> 16) & 0xff;
108 *dp = (*t >> 8) & 0xff;
109 *fp = (*t >> 0) & 0xff;
110 }
111
112 /*
113 * Well, yay, deal with the wonders of weird_t. We'll just
114 * assume it's an integral type (which, btw, isn't universally true).
115 * The hypercall will map "cookie" to its internal structure.
116 * Dial _t for a good time.
117 */
118 int
pci_intr_map(const struct pci_attach_args * pa,pci_intr_handle_t * ih)119 pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ih)
120 {
121 static unsigned int intrhandle;
122 unsigned cookie;
123 int rv;
124
125 cookie = atomic_inc_uint_nv(&intrhandle);
126 rv = rumpcomp_pci_irq_map(pa->pa_bus,
127 pa->pa_device, pa->pa_function, pa->pa_intrline, cookie);
128 if (rv == 0)
129 *ih = cookie;
130 return 0;
131 }
132
133 const char *
pci_intr_string(pci_chipset_tag_t pc,pci_intr_handle_t ih,char * buf,size_t buflen)134 pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih,
135 char *buf, size_t buflen)
136 {
137
138 snprintf(buf, buflen, "pausebreak");
139 return buf;
140 }
141
142 void *
pci_intr_establish(pci_chipset_tag_t pc,pci_intr_handle_t ih,int level,int (* func)(void *),void * arg)143 pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih,
144 int level, int (*func)(void *), void *arg)
145 {
146
147 return rumpcomp_pci_irq_establish(ih, func, arg);
148 }
149
150 int
pci_intr_setattr(pci_chipset_tag_t pc,pci_intr_handle_t * ih,int attr,uint64_t data)151 pci_intr_setattr(pci_chipset_tag_t pc, pci_intr_handle_t *ih,
152 int attr, uint64_t data)
153 {
154
155 switch (attr) {
156 case PCI_INTR_MPSAFE:
157 return 0;
158 default:
159 return ENODEV;
160 }
161 }
162
163 void
pci_intr_disestablish(pci_chipset_tag_t pc,void * not_your_above_ih)164 pci_intr_disestablish(pci_chipset_tag_t pc, void *not_your_above_ih)
165 {
166
167 panic("%s: unimplemented", __func__);
168 }
169
170 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
171 #include <dev/pci/pcireg.h>
172 #include <dev/pci/pcivar.h>
173 #include <dev/pci/pciidereg.h>
174 #include <dev/pci/pciidevar.h>
175
176 void *
pciide_machdep_compat_intr_establish(device_t dev,const struct pci_attach_args * pa,int chan,int (* func)(void *),void * arg)177 pciide_machdep_compat_intr_establish(device_t dev,
178 const struct pci_attach_args *pa, int chan,
179 int (*func)(void *), void *arg)
180 {
181 pci_intr_handle_t ih;
182 struct pci_attach_args mypa = *pa;
183
184 mypa.pa_intrline = PCIIDE_COMPAT_IRQ(chan);
185 if (pci_intr_map(&mypa, &ih) != 0)
186 return NULL;
187 return rumpcomp_pci_irq_establish(ih, func, arg);
188 }
189
190 __strong_alias(pciide_machdep_compat_intr_disestablish,pci_intr_disestablish);
191 #endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */
192