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Linux/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 /* Define the macro locally since it's different for different class of chips.
 47  */
 48 #define ID(x)            \
 49         ID2C(x),         \
 50         ID2C(IDIROC(x))
 51 
 52 static const struct pci_device_id ahd_linux_pci_id_table[] = {
 53         /* aic7901 based controllers */
 54         ID(ID_AHA_29320A),
 55         ID(ID_AHA_29320ALP),
 56         ID(ID_AHA_29320LPE),
 57         /* aic7902 based controllers */
 58         ID(ID_AHA_29320),
 59         ID(ID_AHA_29320B),
 60         ID(ID_AHA_29320LP),
 61         ID(ID_AHA_39320),
 62         ID(ID_AHA_39320_B),
 63         ID(ID_AHA_39320A),
 64         ID(ID_AHA_39320D),
 65         ID(ID_AHA_39320D_HP),
 66         ID(ID_AHA_39320D_B),
 67         ID(ID_AHA_39320D_B_HP),
 68         /* Generic chip probes for devices we don't know exactly. */
 69         ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
 70         ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
 71         ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
 72         { 0 }
 73 };
 74 
 75 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
 76 
 77 #ifdef CONFIG_PM
 78 static int
 79 ahd_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
 80 {
 81         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 82         int rc;
 83 
 84         if ((rc = ahd_suspend(ahd)))
 85                 return rc;
 86 
 87         ahd_pci_suspend(ahd);
 88 
 89         pci_save_state(pdev);
 90         pci_disable_device(pdev);
 91 
 92         if (mesg.event & PM_EVENT_SLEEP)
 93                 pci_set_power_state(pdev, PCI_D3hot);
 94 
 95         return rc;
 96 }
 97 
 98 static int
 99 ahd_linux_pci_dev_resume(struct pci_dev *pdev)
100 {
101         struct ahd_softc *ahd = pci_get_drvdata(pdev);
102         int rc;
103 
104         pci_set_power_state(pdev, PCI_D0);
105         pci_restore_state(pdev);
106 
107         if ((rc = pci_enable_device(pdev))) {
108                 dev_printk(KERN_ERR, &pdev->dev,
109                            "failed to enable device after resume (%d)\n", rc);
110                 return rc;
111         }
112 
113         pci_set_master(pdev);
114 
115         ahd_pci_resume(ahd);
116 
117         ahd_resume(ahd);
118 
119         return rc;
120 }
121 #endif
122 
123 static void
124 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
125 {
126         struct ahd_softc *ahd = pci_get_drvdata(pdev);
127         u_long s;
128 
129         if (ahd->platform_data && ahd->platform_data->host)
130                         scsi_remove_host(ahd->platform_data->host);
131 
132         ahd_lock(ahd, &s);
133         ahd_intr_enable(ahd, FALSE);
134         ahd_unlock(ahd, &s);
135         ahd_free(ahd);
136 }
137 
138 static void
139 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
140 {
141         struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
142         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
143 
144         master_pdev = pci_get_slot(pdev->bus, master_devfn);
145         if (master_pdev) {
146                 struct ahd_softc *master = pci_get_drvdata(master_pdev);
147                 if (master) {
148                         ahd->flags &= ~AHD_BIOS_ENABLED;
149                         ahd->flags |= master->flags & AHD_BIOS_ENABLED;
150                 } else
151                         printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
152                 pci_dev_put(master_pdev);
153         }
154 }
155 
156 static int
157 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
158 {
159         char             buf[80];
160         struct           ahd_softc *ahd;
161         ahd_dev_softc_t  pci;
162         const struct ahd_pci_identity *entry;
163         char            *name;
164         int              error;
165         struct device   *dev = &pdev->dev;
166 
167         pci = pdev;
168         entry = ahd_find_pci_device(pci);
169         if (entry == NULL)
170                 return (-ENODEV);
171 
172         /*
173          * Allocate a softc for this card and
174          * set it up for attachment by our
175          * common detect routine.
176          */
177         sprintf(buf, "ahd_pci:%d:%d:%d",
178                 ahd_get_pci_bus(pci),
179                 ahd_get_pci_slot(pci),
180                 ahd_get_pci_function(pci));
181         name = kstrdup(buf, GFP_ATOMIC);
182         if (name == NULL)
183                 return (-ENOMEM);
184         ahd = ahd_alloc(NULL, name);
185         if (ahd == NULL)
186                 return (-ENOMEM);
187         if (pci_enable_device(pdev)) {
188                 ahd_free(ahd);
189                 return (-ENODEV);
190         }
191         pci_set_master(pdev);
192 
193         if (sizeof(dma_addr_t) > 4) {
194                 const u64 required_mask = dma_get_required_mask(dev);
195 
196                 if (required_mask > DMA_BIT_MASK(39) &&
197                     dma_set_mask(dev, DMA_BIT_MASK(64)) == 0)
198                         ahd->flags |= AHD_64BIT_ADDRESSING;
199                 else if (required_mask > DMA_BIT_MASK(32) &&
200                          dma_set_mask(dev, DMA_BIT_MASK(39)) == 0)
201                         ahd->flags |= AHD_39BIT_ADDRESSING;
202                 else
203                         dma_set_mask(dev, DMA_BIT_MASK(32));
204         } else {
205                 dma_set_mask(dev, DMA_BIT_MASK(32));
206         }
207         ahd->dev_softc = pci;
208         error = ahd_pci_config(ahd, entry);
209         if (error != 0) {
210                 ahd_free(ahd);
211                 return (-error);
212         }
213 
214         /*
215          * Second Function PCI devices need to inherit some
216          * * settings from function 0.
217          */
218         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
219                 ahd_linux_pci_inherit_flags(ahd);
220 
221         pci_set_drvdata(pdev, ahd);
222 
223         ahd_linux_register_host(ahd, &aic79xx_driver_template);
224         return (0);
225 }
226 
227 static struct pci_driver aic79xx_pci_driver = {
228         .name           = "aic79xx",
229         .probe          = ahd_linux_pci_dev_probe,
230 #ifdef CONFIG_PM
231         .suspend        = ahd_linux_pci_dev_suspend,
232         .resume         = ahd_linux_pci_dev_resume,
233 #endif
234         .remove         = ahd_linux_pci_dev_remove,
235         .id_table       = ahd_linux_pci_id_table
236 };
237 
238 int
239 ahd_linux_pci_init(void)
240 {
241         return pci_register_driver(&aic79xx_pci_driver);
242 }
243 
244 void
245 ahd_linux_pci_exit(void)
246 {
247         pci_unregister_driver(&aic79xx_pci_driver);
248 }
249 
250 static int
251 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
252                                  resource_size_t *base2)
253 {
254         *base = pci_resource_start(ahd->dev_softc, 0);
255         /*
256          * This is really the 3rd bar and should be at index 2,
257          * but the Linux PCI code doesn't know how to "count" 64bit
258          * bars.
259          */
260         *base2 = pci_resource_start(ahd->dev_softc, 3);
261         if (*base == 0 || *base2 == 0)
262                 return (ENOMEM);
263         if (!request_region(*base, 256, "aic79xx"))
264                 return (ENOMEM);
265         if (!request_region(*base2, 256, "aic79xx")) {
266                 release_region(*base, 256);
267                 return (ENOMEM);
268         }
269         return (0);
270 }
271 
272 static int
273 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
274                                  resource_size_t *bus_addr,
275                                  uint8_t __iomem **maddr)
276 {
277         resource_size_t start;
278         resource_size_t base_page;
279         u_long  base_offset;
280         int     error = 0;
281 
282         if (aic79xx_allow_memio == 0)
283                 return (ENOMEM);
284 
285         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
286                 return (ENOMEM);
287 
288         start = pci_resource_start(ahd->dev_softc, 1);
289         base_page = start & PAGE_MASK;
290         base_offset = start - base_page;
291         if (start != 0) {
292                 *bus_addr = start;
293                 if (!request_mem_region(start, 0x1000, "aic79xx"))
294                         error = ENOMEM;
295                 if (!error) {
296                         *maddr = ioremap_nocache(base_page, base_offset + 512);
297                         if (*maddr == NULL) {
298                                 error = ENOMEM;
299                                 release_mem_region(start, 0x1000);
300                         } else
301                                 *maddr += base_offset;
302                 }
303         } else
304                 error = ENOMEM;
305         return (error);
306 }
307 
308 int
309 ahd_pci_map_registers(struct ahd_softc *ahd)
310 {
311         uint32_t command;
312         resource_size_t base;
313         uint8_t __iomem *maddr;
314         int      error;
315 
316         /*
317          * If its allowed, we prefer memory mapped access.
318          */
319         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
320         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
321         base = 0;
322         maddr = NULL;
323         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
324         if (error == 0) {
325                 ahd->platform_data->mem_busaddr = base;
326                 ahd->tags[0] = BUS_SPACE_MEMIO;
327                 ahd->bshs[0].maddr = maddr;
328                 ahd->tags[1] = BUS_SPACE_MEMIO;
329                 ahd->bshs[1].maddr = maddr + 0x100;
330                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
331                                      command | PCIM_CMD_MEMEN, 4);
332 
333                 if (ahd_pci_test_register_access(ahd) != 0) {
334 
335                         printk("aic79xx: PCI Device %d:%d:%d "
336                                "failed memory mapped test.  Using PIO.\n",
337                                ahd_get_pci_bus(ahd->dev_softc),
338                                ahd_get_pci_slot(ahd->dev_softc),
339                                ahd_get_pci_function(ahd->dev_softc));
340                         iounmap(maddr);
341                         release_mem_region(ahd->platform_data->mem_busaddr,
342                                            0x1000);
343                         ahd->bshs[0].maddr = NULL;
344                         maddr = NULL;
345                 } else
346                         command |= PCIM_CMD_MEMEN;
347         } else if (bootverbose) {
348                 printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
349                        "unavailable. Cannot memory map device.\n",
350                        ahd_get_pci_bus(ahd->dev_softc),
351                        ahd_get_pci_slot(ahd->dev_softc),
352                        ahd_get_pci_function(ahd->dev_softc),
353                        (unsigned long long)base);
354         }
355 
356         if (maddr == NULL) {
357                 resource_size_t base2;
358 
359                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
360                 if (error == 0) {
361                         ahd->tags[0] = BUS_SPACE_PIO;
362                         ahd->tags[1] = BUS_SPACE_PIO;
363                         ahd->bshs[0].ioport = (u_long)base;
364                         ahd->bshs[1].ioport = (u_long)base2;
365                         command |= PCIM_CMD_PORTEN;
366                 } else {
367                         printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
368                                "0x%llx unavailable. Cannot map device.\n",
369                                ahd_get_pci_bus(ahd->dev_softc),
370                                ahd_get_pci_slot(ahd->dev_softc),
371                                ahd_get_pci_function(ahd->dev_softc),
372                                (unsigned long long)base,
373                                (unsigned long long)base2);
374                 }
375         }
376         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
377         return (error);
378 }
379 
380 int
381 ahd_pci_map_int(struct ahd_softc *ahd)
382 {
383         int error;
384 
385         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
386                             IRQF_SHARED, "aic79xx", ahd);
387         if (!error)
388                 ahd->platform_data->irq = ahd->dev_softc->irq;
389         
390         return (-error);
391 }
392 
393 void
394 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
395 {
396         pci_set_power_state(ahd->dev_softc, new_state);
397 }
398 

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