Pull bugzilla-7887 into release branch
[linux-2.6] / drivers / scsi / aic7xxx / aic79xx_osm_pci.c
1 /*
2  * Linux driver attachment glue for PCI based U320 controllers.
3  *
4  * Copyright (c) 2000-2001 Adaptec Inc.
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.
13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14  *    substantially similar to the "NO WARRANTY" disclaimer below
15  *    ("Disclaimer") and any redistribution must be conditioned upon
16  *    including a substantially similar Disclaimer requirement for further
17  *    binary redistribution.
18  * 3. Neither the names of the above-listed copyright holders nor the names
19  *    of any contributors may be used to endorse or promote products derived
20  *    from this software without specific prior written permission.
21  *
22  * Alternatively, this software may be distributed under the terms of the
23  * GNU General Public License ("GPL") version 2 as published by the Free
24  * Software Foundation.
25  *
26  * NO WARRANTY
27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37  * POSSIBILITY OF SUCH DAMAGES.
38  *
39  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $
40  */
41
42 #include "aic79xx_osm.h"
43 #include "aic79xx_inline.h"
44 #include "aic79xx_pci.h"
45
46 static int      ahd_linux_pci_dev_probe(struct pci_dev *pdev,
47                                         const struct pci_device_id *ent);
48 static int      ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
49                                                  u_long *base, u_long *base2);
50 static int      ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
51                                                  u_long *bus_addr,
52                                                  uint8_t __iomem **maddr);
53 static void     ahd_linux_pci_dev_remove(struct pci_dev *pdev);
54
55 /* Define the macro locally since it's different for different class of chips.
56  */
57 #define ID(x)            \
58         ID2C(x),         \
59         ID2C(IDIROC(x))
60
61 static struct pci_device_id ahd_linux_pci_id_table[] = {
62         /* aic7901 based controllers */
63         ID(ID_AHA_29320A),
64         ID(ID_AHA_29320ALP),
65         ID(ID_AHA_29320LPE),
66         /* aic7902 based controllers */
67         ID(ID_AHA_29320),
68         ID(ID_AHA_29320B),
69         ID(ID_AHA_29320LP),
70         ID(ID_AHA_39320),
71         ID(ID_AHA_39320_B),
72         ID(ID_AHA_39320A),
73         ID(ID_AHA_39320D),
74         ID(ID_AHA_39320D_HP),
75         ID(ID_AHA_39320D_B),
76         ID(ID_AHA_39320D_B_HP),
77         /* Generic chip probes for devices we don't know exactly. */
78         ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
79         ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
80         ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
81         { 0 }
82 };
83
84 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
85
86 static struct pci_driver aic79xx_pci_driver = {
87         .name           = "aic79xx",
88         .probe          = ahd_linux_pci_dev_probe,
89         .remove         = ahd_linux_pci_dev_remove,
90         .id_table       = ahd_linux_pci_id_table
91 };
92
93 static void
94 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
95 {
96         struct ahd_softc *ahd = pci_get_drvdata(pdev);
97         u_long s;
98
99         if (ahd->platform_data && ahd->platform_data->host)
100                         scsi_remove_host(ahd->platform_data->host);
101
102         ahd_lock(ahd, &s);
103         ahd_intr_enable(ahd, FALSE);
104         ahd_unlock(ahd, &s);
105         ahd_free(ahd);
106 }
107
108 static void
109 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
110 {
111         struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
112         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
113
114         master_pdev = pci_get_slot(pdev->bus, master_devfn);
115         if (master_pdev) {
116                 struct ahd_softc *master = pci_get_drvdata(master_pdev);
117                 if (master) {
118                         ahd->flags &= ~AHD_BIOS_ENABLED;
119                         ahd->flags |= master->flags & AHD_BIOS_ENABLED;
120                 } else
121                         printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
122                 pci_dev_put(master_pdev);
123         }
124 }
125
126 static int
127 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
128 {
129         char             buf[80];
130         struct           ahd_softc *ahd;
131         ahd_dev_softc_t  pci;
132         struct           ahd_pci_identity *entry;
133         char            *name;
134         int              error;
135         struct device   *dev = &pdev->dev;
136
137         pci = pdev;
138         entry = ahd_find_pci_device(pci);
139         if (entry == NULL)
140                 return (-ENODEV);
141
142         /*
143          * Allocate a softc for this card and
144          * set it up for attachment by our
145          * common detect routine.
146          */
147         sprintf(buf, "ahd_pci:%d:%d:%d",
148                 ahd_get_pci_bus(pci),
149                 ahd_get_pci_slot(pci),
150                 ahd_get_pci_function(pci));
151         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
152         if (name == NULL)
153                 return (-ENOMEM);
154         strcpy(name, buf);
155         ahd = ahd_alloc(NULL, name);
156         if (ahd == NULL)
157                 return (-ENOMEM);
158         if (pci_enable_device(pdev)) {
159                 ahd_free(ahd);
160                 return (-ENODEV);
161         }
162         pci_set_master(pdev);
163
164         if (sizeof(dma_addr_t) > 4) {
165                 const u64 required_mask = dma_get_required_mask(dev);
166
167                 if (required_mask > DMA_39BIT_MASK &&
168                     dma_set_mask(dev, DMA_64BIT_MASK) == 0)
169                         ahd->flags |= AHD_64BIT_ADDRESSING;
170                 else if (required_mask > DMA_32BIT_MASK &&
171                          dma_set_mask(dev, DMA_39BIT_MASK) == 0)
172                         ahd->flags |= AHD_39BIT_ADDRESSING;
173                 else
174                         dma_set_mask(dev, DMA_32BIT_MASK);
175         } else {
176                 dma_set_mask(dev, DMA_32BIT_MASK);
177         }
178         ahd->dev_softc = pci;
179         error = ahd_pci_config(ahd, entry);
180         if (error != 0) {
181                 ahd_free(ahd);
182                 return (-error);
183         }
184
185         /*
186          * Second Function PCI devices need to inherit some
187          * * settings from function 0.
188          */
189         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
190                 ahd_linux_pci_inherit_flags(ahd);
191
192         pci_set_drvdata(pdev, ahd);
193
194         ahd_linux_register_host(ahd, &aic79xx_driver_template);
195         return (0);
196 }
197
198 int
199 ahd_linux_pci_init(void)
200 {
201         return pci_register_driver(&aic79xx_pci_driver);
202 }
203
204 void
205 ahd_linux_pci_exit(void)
206 {
207         pci_unregister_driver(&aic79xx_pci_driver);
208 }
209
210 static int
211 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
212                                  u_long *base2)
213 {
214         *base = pci_resource_start(ahd->dev_softc, 0);
215         /*
216          * This is really the 3rd bar and should be at index 2,
217          * but the Linux PCI code doesn't know how to "count" 64bit
218          * bars.
219          */
220         *base2 = pci_resource_start(ahd->dev_softc, 3);
221         if (*base == 0 || *base2 == 0)
222                 return (ENOMEM);
223         if (!request_region(*base, 256, "aic79xx"))
224                 return (ENOMEM);
225         if (!request_region(*base2, 256, "aic79xx")) {
226                 release_region(*base, 256);
227                 return (ENOMEM);
228         }
229         return (0);
230 }
231
232 static int
233 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
234                                  u_long *bus_addr,
235                                  uint8_t __iomem **maddr)
236 {
237         u_long  start;
238         u_long  base_page;
239         u_long  base_offset;
240         int     error = 0;
241
242         if (aic79xx_allow_memio == 0)
243                 return (ENOMEM);
244
245         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
246                 return (ENOMEM);
247
248         start = pci_resource_start(ahd->dev_softc, 1);
249         base_page = start & PAGE_MASK;
250         base_offset = start - base_page;
251         if (start != 0) {
252                 *bus_addr = start;
253                 if (!request_mem_region(start, 0x1000, "aic79xx"))
254                         error = ENOMEM;
255                 if (!error) {
256                         *maddr = ioremap_nocache(base_page, base_offset + 512);
257                         if (*maddr == NULL) {
258                                 error = ENOMEM;
259                                 release_mem_region(start, 0x1000);
260                         } else
261                                 *maddr += base_offset;
262                 }
263         } else
264                 error = ENOMEM;
265         return (error);
266 }
267
268 int
269 ahd_pci_map_registers(struct ahd_softc *ahd)
270 {
271         uint32_t command;
272         u_long   base;
273         uint8_t __iomem *maddr;
274         int      error;
275
276         /*
277          * If its allowed, we prefer memory mapped access.
278          */
279         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
280         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
281         base = 0;
282         maddr = NULL;
283         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
284         if (error == 0) {
285                 ahd->platform_data->mem_busaddr = base;
286                 ahd->tags[0] = BUS_SPACE_MEMIO;
287                 ahd->bshs[0].maddr = maddr;
288                 ahd->tags[1] = BUS_SPACE_MEMIO;
289                 ahd->bshs[1].maddr = maddr + 0x100;
290                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
291                                      command | PCIM_CMD_MEMEN, 4);
292
293                 if (ahd_pci_test_register_access(ahd) != 0) {
294
295                         printf("aic79xx: PCI Device %d:%d:%d "
296                                "failed memory mapped test.  Using PIO.\n",
297                                ahd_get_pci_bus(ahd->dev_softc),
298                                ahd_get_pci_slot(ahd->dev_softc),
299                                ahd_get_pci_function(ahd->dev_softc));
300                         iounmap(maddr);
301                         release_mem_region(ahd->platform_data->mem_busaddr,
302                                            0x1000);
303                         ahd->bshs[0].maddr = NULL;
304                         maddr = NULL;
305                 } else
306                         command |= PCIM_CMD_MEMEN;
307         } else if (bootverbose) {
308                 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
309                        "unavailable. Cannot memory map device.\n",
310                        ahd_get_pci_bus(ahd->dev_softc),
311                        ahd_get_pci_slot(ahd->dev_softc),
312                        ahd_get_pci_function(ahd->dev_softc),
313                        base);
314         }
315
316         if (maddr == NULL) {
317                 u_long   base2;
318
319                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
320                 if (error == 0) {
321                         ahd->tags[0] = BUS_SPACE_PIO;
322                         ahd->tags[1] = BUS_SPACE_PIO;
323                         ahd->bshs[0].ioport = base;
324                         ahd->bshs[1].ioport = base2;
325                         command |= PCIM_CMD_PORTEN;
326                 } else {
327                         printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
328                                "unavailable. Cannot map device.\n",
329                                ahd_get_pci_bus(ahd->dev_softc),
330                                ahd_get_pci_slot(ahd->dev_softc),
331                                ahd_get_pci_function(ahd->dev_softc),
332                                base, base2);
333                 }
334         }
335         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
336         return (error);
337 }
338
339 int
340 ahd_pci_map_int(struct ahd_softc *ahd)
341 {
342         int error;
343
344         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
345                             IRQF_SHARED, "aic79xx", ahd);
346         if (!error)
347                 ahd->platform_data->irq = ahd->dev_softc->irq;
348         
349         return (-error);
350 }
351
352 void
353 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
354 {
355         pci_set_power_state(ahd->dev_softc, new_state);
356 }