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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 = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
182         if (name == NULL)
183                 return (-ENOMEM);
184         strcpy(name, buf);
185         ahd = ahd_alloc(NULL, name);
186         if (ahd == NULL)
187                 return (-ENOMEM);
188         if (pci_enable_device(pdev)) {
189                 ahd_free(ahd);
190                 return (-ENODEV);
191         }
192         pci_set_master(pdev);
193 
194         if (sizeof(dma_addr_t) > 4) {
195                 const u64 required_mask = dma_get_required_mask(dev);
196 
197                 if (required_mask > DMA_BIT_MASK(39) &&
198                     dma_set_mask(dev, DMA_BIT_MASK(64)) == 0)
199                         ahd->flags |= AHD_64BIT_ADDRESSING;
200                 else if (required_mask > DMA_BIT_MASK(32) &&
201                          dma_set_mask(dev, DMA_BIT_MASK(39)) == 0)
202                         ahd->flags |= AHD_39BIT_ADDRESSING;
203                 else
204                         dma_set_mask(dev, DMA_BIT_MASK(32));
205         } else {
206                 dma_set_mask(dev, DMA_BIT_MASK(32));
207         }
208         ahd->dev_softc = pci;
209         error = ahd_pci_config(ahd, entry);
210         if (error != 0) {
211                 ahd_free(ahd);
212                 return (-error);
213         }
214 
215         /*
216          * Second Function PCI devices need to inherit some
217          * * settings from function 0.
218          */
219         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
220                 ahd_linux_pci_inherit_flags(ahd);
221 
222         pci_set_drvdata(pdev, ahd);
223 
224         ahd_linux_register_host(ahd, &aic79xx_driver_template);
225         return (0);
226 }
227 
228 static struct pci_driver aic79xx_pci_driver = {
229         .name           = "aic79xx",
230         .probe          = ahd_linux_pci_dev_probe,
231 #ifdef CONFIG_PM
232         .suspend        = ahd_linux_pci_dev_suspend,
233         .resume         = ahd_linux_pci_dev_resume,
234 #endif
235         .remove         = ahd_linux_pci_dev_remove,
236         .id_table       = ahd_linux_pci_id_table
237 };
238 
239 int
240 ahd_linux_pci_init(void)
241 {
242         return pci_register_driver(&aic79xx_pci_driver);
243 }
244 
245 void
246 ahd_linux_pci_exit(void)
247 {
248         pci_unregister_driver(&aic79xx_pci_driver);
249 }
250 
251 static int
252 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
253                                  resource_size_t *base2)
254 {
255         *base = pci_resource_start(ahd->dev_softc, 0);
256         /*
257          * This is really the 3rd bar and should be at index 2,
258          * but the Linux PCI code doesn't know how to "count" 64bit
259          * bars.
260          */
261         *base2 = pci_resource_start(ahd->dev_softc, 3);
262         if (*base == 0 || *base2 == 0)
263                 return (ENOMEM);
264         if (!request_region(*base, 256, "aic79xx"))
265                 return (ENOMEM);
266         if (!request_region(*base2, 256, "aic79xx")) {
267                 release_region(*base, 256);
268                 return (ENOMEM);
269         }
270         return (0);
271 }
272 
273 static int
274 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
275                                  resource_size_t *bus_addr,
276                                  uint8_t __iomem **maddr)
277 {
278         resource_size_t start;
279         resource_size_t base_page;
280         u_long  base_offset;
281         int     error = 0;
282 
283         if (aic79xx_allow_memio == 0)
284                 return (ENOMEM);
285 
286         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
287                 return (ENOMEM);
288 
289         start = pci_resource_start(ahd->dev_softc, 1);
290         base_page = start & PAGE_MASK;
291         base_offset = start - base_page;
292         if (start != 0) {
293                 *bus_addr = start;
294                 if (!request_mem_region(start, 0x1000, "aic79xx"))
295                         error = ENOMEM;
296                 if (!error) {
297                         *maddr = ioremap_nocache(base_page, base_offset + 512);
298                         if (*maddr == NULL) {
299                                 error = ENOMEM;
300                                 release_mem_region(start, 0x1000);
301                         } else
302                                 *maddr += base_offset;
303                 }
304         } else
305                 error = ENOMEM;
306         return (error);
307 }
308 
309 int
310 ahd_pci_map_registers(struct ahd_softc *ahd)
311 {
312         uint32_t command;
313         resource_size_t base;
314         uint8_t __iomem *maddr;
315         int      error;
316 
317         /*
318          * If its allowed, we prefer memory mapped access.
319          */
320         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
321         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
322         base = 0;
323         maddr = NULL;
324         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
325         if (error == 0) {
326                 ahd->platform_data->mem_busaddr = base;
327                 ahd->tags[0] = BUS_SPACE_MEMIO;
328                 ahd->bshs[0].maddr = maddr;
329                 ahd->tags[1] = BUS_SPACE_MEMIO;
330                 ahd->bshs[1].maddr = maddr + 0x100;
331                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
332                                      command | PCIM_CMD_MEMEN, 4);
333 
334                 if (ahd_pci_test_register_access(ahd) != 0) {
335 
336                         printk("aic79xx: PCI Device %d:%d:%d "
337                                "failed memory mapped test.  Using PIO.\n",
338                                ahd_get_pci_bus(ahd->dev_softc),
339                                ahd_get_pci_slot(ahd->dev_softc),
340                                ahd_get_pci_function(ahd->dev_softc));
341                         iounmap(maddr);
342                         release_mem_region(ahd->platform_data->mem_busaddr,
343                                            0x1000);
344                         ahd->bshs[0].maddr = NULL;
345                         maddr = NULL;
346                 } else
347                         command |= PCIM_CMD_MEMEN;
348         } else if (bootverbose) {
349                 printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
350                        "unavailable. Cannot memory map device.\n",
351                        ahd_get_pci_bus(ahd->dev_softc),
352                        ahd_get_pci_slot(ahd->dev_softc),
353                        ahd_get_pci_function(ahd->dev_softc),
354                        (unsigned long long)base);
355         }
356 
357         if (maddr == NULL) {
358                 resource_size_t base2;
359 
360                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
361                 if (error == 0) {
362                         ahd->tags[0] = BUS_SPACE_PIO;
363                         ahd->tags[1] = BUS_SPACE_PIO;
364                         ahd->bshs[0].ioport = (u_long)base;
365                         ahd->bshs[1].ioport = (u_long)base2;
366                         command |= PCIM_CMD_PORTEN;
367                 } else {
368                         printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
369                                "0x%llx unavailable. Cannot map device.\n",
370                                ahd_get_pci_bus(ahd->dev_softc),
371                                ahd_get_pci_slot(ahd->dev_softc),
372                                ahd_get_pci_function(ahd->dev_softc),
373                                (unsigned long long)base,
374                                (unsigned long long)base2);
375                 }
376         }
377         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
378         return (error);
379 }
380 
381 int
382 ahd_pci_map_int(struct ahd_softc *ahd)
383 {
384         int error;
385 
386         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
387                             IRQF_SHARED, "aic79xx", ahd);
388         if (!error)
389                 ahd->platform_data->irq = ahd->dev_softc->irq;
390         
391         return (-error);
392 }
393 
394 void
395 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
396 {
397         pci_set_power_state(ahd->dev_softc, new_state);
398 }
399 

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