Set allow_memio to 1 if fetching the allow_memio hint fails. This
[dragonfly.git] / sys / dev / disk / aic7xxx / ahd_pci.c
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  *
31  * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahd_pci.c#17 $
32  *
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 $
35  */
36
37 #include "aic79xx_osm.h"
38
39 static int ahd_pci_probe(device_t dev);
40 static int ahd_pci_attach(device_t dev);
41
42 static 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
50 static driver_t ahd_pci_driver = {
51         "ahd",
52         ahd_pci_device_methods,
53         sizeof(struct ahd_softc)
54 };
55
56 static devclass_t ahd_devclass;
57
58 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
59 DRIVER_MODULE(ahd, cardbus, ahd_pci_driver, ahd_devclass, 0, 0);
60 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
61 MODULE_VERSION(ahd_pci, 1);
62
63 static int
64 ahd_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);
71                 return (BUS_PROBE_DEFAULT);
72         }
73         return (ENXIO);
74 }
75
76 static int
77 ahd_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          */
93         name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_WAITOK);
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 */
110         error = aic_dma_tag_create(ahd, /*parent*/NULL, /*alignment*/1,
111                                    /*boundary*/0,
112                                    (ahd->flags & AHD_39BIT_ADDRESSING)
113                                    ? 0x7FFFFFFFFFULL
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) {
124                 kprintf("ahd_pci_attach: Could not allocate DMA tag "
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
140 int
141 ahd_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
151         command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
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");
164                 allow_memio = 1;
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;
173                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
174                                               &regs_id, RF_ACTIVE);
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",
194                                        aic_get_pci_bus(ahd->dev_softc),
195                                        aic_get_pci_slot(ahd->dev_softc),
196                                        aic_get_pci_function(ahd->dev_softc));
197                                 bus_release_resource(ahd->dev_softc, regs_type,
198                                                      regs_id, regs);
199                                 regs = NULL;
200                         } else {
201                                 command &= ~PCIM_CMD_PORTEN;
202                                 aic_pci_write_config(ahd->dev_softc,
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;
211                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
212                                               &regs_id, RF_ACTIVE);
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;
223                 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
224                                                &regs_id2, RF_ACTIVE);
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;
233                 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
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
245 int
246 ahd_pci_map_int(struct ahd_softc *ahd)
247 {
248         int zero;
249
250         zero = 0;
251         ahd->platform_data->irq =
252             bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
253                                    RF_ACTIVE | RF_SHAREABLE);
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 }