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Linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c

  1 /*
  2  * Linux driver attachment glue for PCI based 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/aic7xxx_osm_pci.c#47 $
 40  */
 41 
 42 #include "aic7xxx_osm.h"
 43 #include "aic7xxx_pci.h"
 44 
 45 /* Define the macro locally since it's different for different class of chips.
 46 */
 47 #define ID(x)   ID_C(x, PCI_CLASS_STORAGE_SCSI)
 48 
 49 static const struct pci_device_id ahc_linux_pci_id_table[] = {
 50         /* aic7850 based controllers */
 51         ID(ID_AHA_2902_04_10_15_20C_30C),
 52         /* aic7860 based controllers */
 53         ID(ID_AHA_2930CU),
 54         ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
 55         ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
 56         ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
 57         ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
 58         /* aic7870 based controllers */
 59         ID(ID_AHA_2940),
 60         ID(ID_AHA_3940),
 61         ID(ID_AHA_398X),
 62         ID(ID_AHA_2944),
 63         ID(ID_AHA_3944),
 64         ID(ID_AHA_4944),
 65         /* aic7880 based controllers */
 66         ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
 67         ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
 68         ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
 69         ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
 70         ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
 71         ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
 72         ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
 73         ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
 74         ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
 75         /* aic7890 based controllers */
 76         ID(ID_AHA_2930U2),
 77         ID(ID_AHA_2940U2B),
 78         ID(ID_AHA_2940U2_OEM),
 79         ID(ID_AHA_2940U2),
 80         ID(ID_AHA_2950U2B),
 81         ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
 82         ID(ID_AAA_131U2),
 83         /* aic7890 based controllers */
 84         ID(ID_AHA_29160),
 85         ID(ID_AHA_29160_CPQ),
 86         ID(ID_AHA_29160N),
 87         ID(ID_AHA_29160C),
 88         ID(ID_AHA_29160B),
 89         ID(ID_AHA_19160B),
 90         ID(ID_AIC7892_ARO),
 91         /* aic7892 based controllers */
 92         ID(ID_AHA_2940U_DUAL),
 93         ID(ID_AHA_3940AU),
 94         ID(ID_AHA_3944AU),
 95         ID(ID_AIC7895_ARO),
 96         ID(ID_AHA_3950U2B_0),
 97         ID(ID_AHA_3950U2B_1),
 98         ID(ID_AHA_3950U2D_0),
 99         ID(ID_AHA_3950U2D_1),
100         ID(ID_AIC7896_ARO),
101         /* aic7899 based controllers */
102         ID(ID_AHA_3960D),
103         ID(ID_AHA_3960D_CPQ),
104         ID(ID_AIC7899_ARO),
105         /* Generic chip probes for devices we don't know exactly. */
106         ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
107         ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
108         ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
109         ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
110         ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
111         ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
112         ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
113         ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
114         ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
115         ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
116         ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
117         ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
118         ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
119         { 0 }
120 };
121 
122 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
123 
124 #ifdef CONFIG_PM
125 static int
126 ahc_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
127 {
128         struct ahc_softc *ahc = pci_get_drvdata(pdev);
129         int rc;
130 
131         if ((rc = ahc_suspend(ahc)))
132                 return rc;
133 
134         pci_save_state(pdev);
135         pci_disable_device(pdev);
136 
137         if (mesg.event & PM_EVENT_SLEEP)
138                 pci_set_power_state(pdev, PCI_D3hot);
139 
140         return rc;
141 }
142 
143 static int
144 ahc_linux_pci_dev_resume(struct pci_dev *pdev)
145 {
146         struct ahc_softc *ahc = pci_get_drvdata(pdev);
147         int rc;
148 
149         pci_set_power_state(pdev, PCI_D0);
150         pci_restore_state(pdev);
151 
152         if ((rc = pci_enable_device(pdev))) {
153                 dev_printk(KERN_ERR, &pdev->dev,
154                            "failed to enable device after resume (%d)\n", rc);
155                 return rc;
156         }
157 
158         pci_set_master(pdev);
159 
160         ahc_pci_resume(ahc);
161 
162         return (ahc_resume(ahc));
163 }
164 #endif
165 
166 static void
167 ahc_linux_pci_dev_remove(struct pci_dev *pdev)
168 {
169         struct ahc_softc *ahc = pci_get_drvdata(pdev);
170         u_long s;
171 
172         if (ahc->platform_data && ahc->platform_data->host)
173                         scsi_remove_host(ahc->platform_data->host);
174 
175         ahc_lock(ahc, &s);
176         ahc_intr_enable(ahc, FALSE);
177         ahc_unlock(ahc, &s);
178         ahc_free(ahc);
179 }
180 
181 static void
182 ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
183 {
184         struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
185         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
186 
187         master_pdev = pci_get_slot(pdev->bus, master_devfn);
188         if (master_pdev) {
189                 struct ahc_softc *master = pci_get_drvdata(master_pdev);
190                 if (master) {
191                         ahc->flags &= ~AHC_BIOS_ENABLED; 
192                         ahc->flags |= master->flags & AHC_BIOS_ENABLED;
193 
194                         ahc->flags &= ~AHC_PRIMARY_CHANNEL; 
195                         ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
196                 } else
197                         printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
198                 pci_dev_put(master_pdev);
199         } 
200 }
201 
202 static int
203 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
204 {
205         char             buf[80];
206         const uint64_t   mask_39bit = 0x7FFFFFFFFFULL;
207         struct           ahc_softc *ahc;
208         ahc_dev_softc_t  pci;
209         const struct ahc_pci_identity *entry;
210         char            *name;
211         int              error;
212         struct device   *dev = &pdev->dev;
213 
214         pci = pdev;
215         entry = ahc_find_pci_device(pci);
216         if (entry == NULL)
217                 return (-ENODEV);
218 
219         /*
220          * Allocate a softc for this card and
221          * set it up for attachment by our
222          * common detect routine.
223          */
224         sprintf(buf, "ahc_pci:%d:%d:%d",
225                 ahc_get_pci_bus(pci),
226                 ahc_get_pci_slot(pci),
227                 ahc_get_pci_function(pci));
228         name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
229         if (name == NULL)
230                 return (-ENOMEM);
231         strcpy(name, buf);
232         ahc = ahc_alloc(NULL, name);
233         if (ahc == NULL)
234                 return (-ENOMEM);
235         if (pci_enable_device(pdev)) {
236                 ahc_free(ahc);
237                 return (-ENODEV);
238         }
239         pci_set_master(pdev);
240 
241         if (sizeof(dma_addr_t) > 4
242             && ahc->features & AHC_LARGE_SCBS
243             && dma_set_mask(dev, mask_39bit) == 0
244             && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) {
245                 ahc->flags |= AHC_39BIT_ADDRESSING;
246         } else {
247                 if (dma_set_mask(dev, DMA_BIT_MASK(32))) {
248                         ahc_free(ahc);
249                         printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
250                         return (-ENODEV);
251                 }
252         }
253         ahc->dev_softc = pci;
254         error = ahc_pci_config(ahc, entry);
255         if (error != 0) {
256                 ahc_free(ahc);
257                 return (-error);
258         }
259 
260         /*
261          * Second Function PCI devices need to inherit some
262          * settings from function 0.
263          */
264         if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
265                 ahc_linux_pci_inherit_flags(ahc);
266 
267         pci_set_drvdata(pdev, ahc);
268         ahc_linux_register_host(ahc, &aic7xxx_driver_template);
269         return (0);
270 }
271 
272 /******************************* PCI Routines *********************************/
273 uint32_t
274 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
275 {
276         switch (width) {
277         case 1:
278         {
279                 uint8_t retval;
280 
281                 pci_read_config_byte(pci, reg, &retval);
282                 return (retval);
283         }
284         case 2:
285         {
286                 uint16_t retval;
287                 pci_read_config_word(pci, reg, &retval);
288                 return (retval);
289         }
290         case 4:
291         {
292                 uint32_t retval;
293                 pci_read_config_dword(pci, reg, &retval);
294                 return (retval);
295         }
296         default:
297                 panic("ahc_pci_read_config: Read size too big");
298                 /* NOTREACHED */
299                 return (0);
300         }
301 }
302 
303 void
304 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
305 {
306         switch (width) {
307         case 1:
308                 pci_write_config_byte(pci, reg, value);
309                 break;
310         case 2:
311                 pci_write_config_word(pci, reg, value);
312                 break;
313         case 4:
314                 pci_write_config_dword(pci, reg, value);
315                 break;
316         default:
317                 panic("ahc_pci_write_config: Write size too big");
318                 /* NOTREACHED */
319         }
320 }
321 
322 
323 static struct pci_driver aic7xxx_pci_driver = {
324         .name           = "aic7xxx",
325         .probe          = ahc_linux_pci_dev_probe,
326 #ifdef CONFIG_PM
327         .suspend        = ahc_linux_pci_dev_suspend,
328         .resume         = ahc_linux_pci_dev_resume,
329 #endif
330         .remove         = ahc_linux_pci_dev_remove,
331         .id_table       = ahc_linux_pci_id_table
332 };
333 
334 int
335 ahc_linux_pci_init(void)
336 {
337         return pci_register_driver(&aic7xxx_pci_driver);
338 }
339 
340 void
341 ahc_linux_pci_exit(void)
342 {
343         pci_unregister_driver(&aic7xxx_pci_driver);
344 }
345 
346 static int
347 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
348 {
349         if (aic7xxx_allow_memio == 0)
350                 return (ENOMEM);
351 
352         *base = pci_resource_start(ahc->dev_softc, 0);
353         if (*base == 0)
354                 return (ENOMEM);
355         if (!request_region(*base, 256, "aic7xxx"))
356                 return (ENOMEM);
357         return (0);
358 }
359 
360 static int
361 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
362                                  resource_size_t *bus_addr,
363                                  uint8_t __iomem **maddr)
364 {
365         resource_size_t start;
366         int     error;
367 
368         error = 0;
369         start = pci_resource_start(ahc->dev_softc, 1);
370         if (start != 0) {
371                 *bus_addr = start;
372                 if (!request_mem_region(start, 0x1000, "aic7xxx"))
373                         error = ENOMEM;
374                 if (error == 0) {
375                         *maddr = ioremap_nocache(start, 256);
376                         if (*maddr == NULL) {
377                                 error = ENOMEM;
378                                 release_mem_region(start, 0x1000);
379                         }
380                 }
381         } else
382                 error = ENOMEM;
383         return (error);
384 }
385 
386 int
387 ahc_pci_map_registers(struct ahc_softc *ahc)
388 {
389         uint32_t command;
390         resource_size_t base;
391         uint8_t __iomem *maddr;
392         int      error;
393 
394         /*
395          * If its allowed, we prefer memory mapped access.
396          */
397         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
398         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
399         base = 0;
400         maddr = NULL;
401         error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
402         if (error == 0) {
403                 ahc->platform_data->mem_busaddr = base;
404                 ahc->tag = BUS_SPACE_MEMIO;
405                 ahc->bsh.maddr = maddr;
406                 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
407                                      command | PCIM_CMD_MEMEN, 4);
408 
409                 /*
410                  * Do a quick test to see if memory mapped
411                  * I/O is functioning correctly.
412                  */
413                 if (ahc_pci_test_register_access(ahc) != 0) {
414 
415                         printk("aic7xxx: PCI Device %d:%d:%d "
416                                "failed memory mapped test.  Using PIO.\n",
417                                ahc_get_pci_bus(ahc->dev_softc),
418                                ahc_get_pci_slot(ahc->dev_softc),
419                                ahc_get_pci_function(ahc->dev_softc));
420                         iounmap(maddr);
421                         release_mem_region(ahc->platform_data->mem_busaddr,
422                                            0x1000);
423                         ahc->bsh.maddr = NULL;
424                         maddr = NULL;
425                 } else
426                         command |= PCIM_CMD_MEMEN;
427         } else {
428                 printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
429                        "unavailable. Cannot memory map device.\n",
430                        ahc_get_pci_bus(ahc->dev_softc),
431                        ahc_get_pci_slot(ahc->dev_softc),
432                        ahc_get_pci_function(ahc->dev_softc),
433                        (unsigned long long)base);
434         }
435 
436         /*
437          * We always prefer memory mapped access.
438          */
439         if (maddr == NULL) {
440 
441                 error = ahc_linux_pci_reserve_io_region(ahc, &base);
442                 if (error == 0) {
443                         ahc->tag = BUS_SPACE_PIO;
444                         ahc->bsh.ioport = (u_long)base;
445                         command |= PCIM_CMD_PORTEN;
446                 } else {
447                         printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "
448                                "unavailable. Cannot map device.\n",
449                                ahc_get_pci_bus(ahc->dev_softc),
450                                ahc_get_pci_slot(ahc->dev_softc),
451                                ahc_get_pci_function(ahc->dev_softc),
452                                (unsigned long long)base);
453                 }
454         }
455         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
456         return (error);
457 }
458 
459 int
460 ahc_pci_map_int(struct ahc_softc *ahc)
461 {
462         int error;
463 
464         error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
465                             IRQF_SHARED, "aic7xxx", ahc);
466         if (error == 0)
467                 ahc->platform_data->irq = ahc->dev_softc->irq;
468         
469         return (-error);
470 }
471 
472 

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