Set allow_memio to 1 if fetching the allow_memio hint fails. This
[dragonfly.git] / sys / dev / disk / aic7xxx / ahd_pci.c
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1/*
2 * FreeBSD, PCI product support functions
3 *
4 * Copyright (c) 1995-2001 Justin T. Gibbs
5 * All rights reserved.
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 * without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU Public License ("GPL").
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
750f3593 31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahd_pci.c#17 $
984263bc 32 *
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33 * $FreeBSD: src/sys/dev/aic7xxx/ahd_pci.c,v 1.19 2005/09/22 04:56:59 gibbs Exp $
34 * $DragonFly: src/sys/dev/disk/aic7xxx/ahd_pci.c,v 1.12 2007/07/07 00:10:39 pavalos Exp $
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35 */
36
1f2de5d4 37#include "aic79xx_osm.h"
984263bc 38
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39static int ahd_pci_probe(device_t dev);
40static int ahd_pci_attach(device_t dev);
41
42static device_method_t ahd_pci_device_methods[] = {
43 /* Device interface */
44 DEVMETHOD(device_probe, ahd_pci_probe),
45 DEVMETHOD(device_attach, ahd_pci_attach),
46 DEVMETHOD(device_detach, ahd_detach),
47 { 0, 0 }
48};
49
50static driver_t ahd_pci_driver = {
51 "ahd",
52 ahd_pci_device_methods,
53 sizeof(struct ahd_softc)
54};
55
56static devclass_t ahd_devclass;
57
58DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
59DRIVER_MODULE(ahd, cardbus, ahd_pci_driver, ahd_devclass, 0, 0);
60MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
61MODULE_VERSION(ahd_pci, 1);
62
63static int
64ahd_pci_probe(device_t dev)
65{
66 struct ahd_pci_identity *entry;
67
68 entry = ahd_find_pci_device(dev);
69 if (entry != NULL) {
70 device_set_desc(dev, entry->name);
9ae20e95 71 return (BUS_PROBE_DEFAULT);
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72 }
73 return (ENXIO);
74}
75
76static int
77ahd_pci_attach(device_t dev)
78{
79 struct ahd_pci_identity *entry;
80 struct ahd_softc *ahd;
81 char *name;
82 int error;
83
84 entry = ahd_find_pci_device(dev);
85 if (entry == NULL)
86 return (ENXIO);
87
88 /*
89 * Allocate a softc for this card and
90 * set it up for attachment by our
91 * common detect routine.
92 */
efda3bd0 93 name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_WAITOK);
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94 strcpy(name, device_get_nameunit(dev));
95 ahd = ahd_alloc(dev, name);
96 if (ahd == NULL)
97 return (ENOMEM);
98
99 ahd_set_unit(ahd, device_get_unit(dev));
100
101 /*
102 * Should we bother disabling 39Bit addressing
103 * based on installed memory?
104 */
105 if (sizeof(bus_addr_t) > 4)
106 ahd->flags |= AHD_39BIT_ADDRESSING;
107
108 /* Allocate a dmatag for our SCB DMA maps */
109 /* XXX Should be a child of the PCI bus dma tag */
750f3593 110 error = aic_dma_tag_create(ahd, /*parent*/NULL, /*alignment*/1,
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111 /*boundary*/0,
112 (ahd->flags & AHD_39BIT_ADDRESSING)
6b08710e 113 ? 0x7FFFFFFFFFULL
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114 : BUS_SPACE_MAXADDR_32BIT,
115 /*highaddr*/BUS_SPACE_MAXADDR,
116 /*filter*/NULL, /*filterarg*/NULL,
117 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
118 /*nsegments*/AHD_NSEG,
119 /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
120 /*flags*/0,
121 &ahd->parent_dmat);
122
123 if (error != 0) {
e3869ec7 124 kprintf("ahd_pci_attach: Could not allocate DMA tag "
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125 "- error %d\n", error);
126 ahd_free(ahd);
127 return (ENOMEM);
128 }
129 ahd->dev_softc = dev;
130 error = ahd_pci_config(ahd, entry);
131 if (error != 0) {
132 ahd_free(ahd);
133 return (error);
134 }
135
136 ahd_attach(ahd);
137 return (0);
138}
139
140int
141ahd_pci_map_registers(struct ahd_softc *ahd)
142{
143 struct resource *regs;
144 struct resource *regs2;
145 u_int command;
146 int regs_type;
147 int regs_id;
148 int regs_id2;
149 int allow_memio;
150
750f3593 151 command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
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152 regs = NULL;
153 regs2 = NULL;
154 regs_type = 0;
155 regs_id = 0;
156
157 /* Retrieve the per-device 'allow_memio' hint */
158 if (resource_int_value(device_get_name(ahd->dev_softc),
159 device_get_unit(ahd->dev_softc),
160 "allow_memio", &allow_memio) != 0) {
161 if (bootverbose)
162 device_printf(ahd->dev_softc,
163 "Defaulting to MEMIO on\n");
7dafb332 164 allow_memio = 1;
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165 }
166
167 if ((command & PCIM_CMD_MEMEN) != 0
168 && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
169 && allow_memio != 0) {
170
171 regs_type = SYS_RES_MEMORY;
172 regs_id = AHD_PCI_MEMADDR;
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173 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
174 &regs_id, RF_ACTIVE);
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175 if (regs != NULL) {
176 int error;
177
178 ahd->tags[0] = rman_get_bustag(regs);
179 ahd->bshs[0] = rman_get_bushandle(regs);
180 ahd->tags[1] = ahd->tags[0];
181 error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
182 /*offset*/0x100,
183 /*size*/0x100,
184 &ahd->bshs[1]);
185 /*
186 * Do a quick test to see if memory mapped
187 * I/O is functioning correctly.
188 */
189 if (error != 0
190 || ahd_pci_test_register_access(ahd) != 0) {
191 device_printf(ahd->dev_softc,
192 "PCI Device %d:%d:%d failed memory "
193 "mapped test. Using PIO.\n",
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194 aic_get_pci_bus(ahd->dev_softc),
195 aic_get_pci_slot(ahd->dev_softc),
196 aic_get_pci_function(ahd->dev_softc));
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197 bus_release_resource(ahd->dev_softc, regs_type,
198 regs_id, regs);
199 regs = NULL;
200 } else {
201 command &= ~PCIM_CMD_PORTEN;
750f3593 202 aic_pci_write_config(ahd->dev_softc,
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203 PCIR_COMMAND,
204 command, /*bytes*/1);
205 }
206 }
207 }
208 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
209 regs_type = SYS_RES_IOPORT;
210 regs_id = AHD_PCI_IOADDR0;
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211 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
212 &regs_id, RF_ACTIVE);
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213 if (regs == NULL) {
214 device_printf(ahd->dev_softc,
215 "can't allocate register resources\n");
216 return (ENOMEM);
217 }
218 ahd->tags[0] = rman_get_bustag(regs);
219 ahd->bshs[0] = rman_get_bushandle(regs);
220
221 /* And now the second BAR */
222 regs_id2 = AHD_PCI_IOADDR1;
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223 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
224 &regs_id2, RF_ACTIVE);
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225 if (regs2 == NULL) {
226 device_printf(ahd->dev_softc,
227 "can't allocate register resources\n");
228 return (ENOMEM);
229 }
230 ahd->tags[1] = rman_get_bustag(regs2);
231 ahd->bshs[1] = rman_get_bushandle(regs2);
232 command &= ~PCIM_CMD_MEMEN;
750f3593 233 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
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234 command, /*bytes*/1);
235 ahd->platform_data->regs_res_type[1] = regs_type;
236 ahd->platform_data->regs_res_id[1] = regs_id2;
237 ahd->platform_data->regs[1] = regs2;
238 }
239 ahd->platform_data->regs_res_type[0] = regs_type;
240 ahd->platform_data->regs_res_id[0] = regs_id;
241 ahd->platform_data->regs[0] = regs;
242 return (0);
243}
244
245int
246ahd_pci_map_int(struct ahd_softc *ahd)
247{
248 int zero;
249
250 zero = 0;
251 ahd->platform_data->irq =
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252 bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
253 RF_ACTIVE | RF_SHAREABLE);
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254 if (ahd->platform_data->irq == NULL)
255 return (ENOMEM);
256 ahd->platform_data->irq_res_type = SYS_RES_IRQ;
257 return (ahd_map_int(ahd));
258}