include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.git] / drivers / message / i2o / pci.c
1 /*
2  *      PCI handling of I2O controller
3  *
4  *      Copyright (C) 1999-2002 Red Hat Software
5  *
6  *      Written by Alan Cox, Building Number Three Ltd
7  *
8  *      This program is free software; you can redistribute it and/or modify it
9  *      under the terms of the GNU General Public License as published by the
10  *      Free Software Foundation; either version 2 of the License, or (at your
11  *      option) any later version.
12  *
13  *      A lot of the I2O message side code from this is taken from the Red
14  *      Creek RCPCI45 adapter driver by Red Creek Communications
15  *
16  *      Fixes/additions:
17  *              Philipp Rumpf
18  *              Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
19  *              Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
20  *              Deepak Saxena <deepak@plexity.net>
21  *              Boji T Kannanthanam <boji.t.kannanthanam@intel.com>
22  *              Alan Cox <alan@lxorguk.ukuu.org.uk>:
23  *                      Ported to Linux 2.5.
24  *              Markus Lidel <Markus.Lidel@shadowconnect.com>:
25  *                      Minor fixes for 2.6.
26  *              Markus Lidel <Markus.Lidel@shadowconnect.com>:
27  *                      Support for sysfs included.
28  */
29
30 #include <linux/pci.h>
31 #include <linux/interrupt.h>
32 #include <linux/slab.h>
33 #include <linux/i2o.h>
34 #include "core.h"
35
36 #define OSM_DESCRIPTION "I2O-subsystem"
37
38 /* PCI device id table for all I2O controllers */
39 static struct pci_device_id __devinitdata i2o_pci_ids[] = {
40         {PCI_DEVICE_CLASS(PCI_CLASS_INTELLIGENT_I2O << 8, 0xffff00)},
41         {PCI_DEVICE(PCI_VENDOR_ID_DPT, 0xa511)},
42         {.vendor = PCI_VENDOR_ID_INTEL,.device = 0x1962,
43          .subvendor = PCI_VENDOR_ID_PROMISE,.subdevice = PCI_ANY_ID},
44         {0}
45 };
46
47 /**
48  *      i2o_pci_free - Frees the DMA memory for the I2O controller
49  *      @c: I2O controller to free
50  *
51  *      Remove all allocated DMA memory and unmap memory IO regions. If MTRR
52  *      is enabled, also remove it again.
53  */
54 static void i2o_pci_free(struct i2o_controller *c)
55 {
56         struct device *dev;
57
58         dev = &c->pdev->dev;
59
60         i2o_dma_free(dev, &c->out_queue);
61         i2o_dma_free(dev, &c->status_block);
62         kfree(c->lct);
63         i2o_dma_free(dev, &c->dlct);
64         i2o_dma_free(dev, &c->hrt);
65         i2o_dma_free(dev, &c->status);
66
67         if (c->raptor && c->in_queue.virt)
68                 iounmap(c->in_queue.virt);
69
70         if (c->base.virt)
71                 iounmap(c->base.virt);
72
73         pci_release_regions(c->pdev);
74 }
75
76 /**
77  *      i2o_pci_alloc - Allocate DMA memory, map IO memory for I2O controller
78  *      @c: I2O controller
79  *
80  *      Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All
81  *      IO mappings are also done here. If MTRR is enabled, also do add memory
82  *      regions here.
83  *
84  *      Returns 0 on success or negative error code on failure.
85  */
86 static int __devinit i2o_pci_alloc(struct i2o_controller *c)
87 {
88         struct pci_dev *pdev = c->pdev;
89         struct device *dev = &pdev->dev;
90         int i;
91
92         if (pci_request_regions(pdev, OSM_DESCRIPTION)) {
93                 printk(KERN_ERR "%s: device already claimed\n", c->name);
94                 return -ENODEV;
95         }
96
97         for (i = 0; i < 6; i++) {
98                 /* Skip I/O spaces */
99                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
100                         if (!c->base.phys) {
101                                 c->base.phys = pci_resource_start(pdev, i);
102                                 c->base.len = pci_resource_len(pdev, i);
103
104                                 /*
105                                  * If we know what card it is, set the size
106                                  * correctly. Code is taken from dpt_i2o.c
107                                  */
108                                 if (pdev->device == 0xa501) {
109                                         if (pdev->subsystem_device >= 0xc032 &&
110                                             pdev->subsystem_device <= 0xc03b) {
111                                                 if (c->base.len > 0x400000)
112                                                         c->base.len = 0x400000;
113                                         } else {
114                                                 if (c->base.len > 0x100000)
115                                                         c->base.len = 0x100000;
116                                         }
117                                 }
118                                 if (!c->raptor)
119                                         break;
120                         } else {
121                                 c->in_queue.phys = pci_resource_start(pdev, i);
122                                 c->in_queue.len = pci_resource_len(pdev, i);
123                                 break;
124                         }
125                 }
126         }
127
128         if (i == 6) {
129                 printk(KERN_ERR "%s: I2O controller has no memory regions"
130                        " defined.\n", c->name);
131                 i2o_pci_free(c);
132                 return -EINVAL;
133         }
134
135         /* Map the I2O controller */
136         if (c->raptor) {
137                 printk(KERN_INFO "%s: PCI I2O controller\n", c->name);
138                 printk(KERN_INFO "     BAR0 at 0x%08lX size=%ld\n",
139                        (unsigned long)c->base.phys, (unsigned long)c->base.len);
140                 printk(KERN_INFO "     BAR1 at 0x%08lX size=%ld\n",
141                        (unsigned long)c->in_queue.phys,
142                        (unsigned long)c->in_queue.len);
143         } else
144                 printk(KERN_INFO "%s: PCI I2O controller at %08lX size=%ld\n",
145                        c->name, (unsigned long)c->base.phys,
146                        (unsigned long)c->base.len);
147
148         c->base.virt = ioremap_nocache(c->base.phys, c->base.len);
149         if (!c->base.virt) {
150                 printk(KERN_ERR "%s: Unable to map controller.\n", c->name);
151                 i2o_pci_free(c);
152                 return -ENOMEM;
153         }
154
155         if (c->raptor) {
156                 c->in_queue.virt =
157                     ioremap_nocache(c->in_queue.phys, c->in_queue.len);
158                 if (!c->in_queue.virt) {
159                         printk(KERN_ERR "%s: Unable to map controller.\n",
160                                c->name);
161                         i2o_pci_free(c);
162                         return -ENOMEM;
163                 }
164         } else
165                 c->in_queue = c->base;
166
167         c->irq_status = c->base.virt + I2O_IRQ_STATUS;
168         c->irq_mask = c->base.virt + I2O_IRQ_MASK;
169         c->in_port = c->base.virt + I2O_IN_PORT;
170         c->out_port = c->base.virt + I2O_OUT_PORT;
171
172         /* Motorola/Freescale chip does not follow spec */
173         if (pdev->vendor == PCI_VENDOR_ID_MOTOROLA && pdev->device == 0x18c0) {
174                 /* Check if CPU is enabled */
175                 if (be32_to_cpu(readl(c->base.virt + 0x10000)) & 0x10000000) {
176                         printk(KERN_INFO "%s: MPC82XX needs CPU running to "
177                                "service I2O.\n", c->name);
178                         i2o_pci_free(c);
179                         return -ENODEV;
180                 } else {
181                         c->irq_status += I2O_MOTOROLA_PORT_OFFSET;
182                         c->irq_mask += I2O_MOTOROLA_PORT_OFFSET;
183                         c->in_port += I2O_MOTOROLA_PORT_OFFSET;
184                         c->out_port += I2O_MOTOROLA_PORT_OFFSET;
185                         printk(KERN_INFO "%s: MPC82XX workarounds activated.\n",
186                                c->name);
187                 }
188         }
189
190         if (i2o_dma_alloc(dev, &c->status, 8)) {
191                 i2o_pci_free(c);
192                 return -ENOMEM;
193         }
194
195         if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt))) {
196                 i2o_pci_free(c);
197                 return -ENOMEM;
198         }
199
200         if (i2o_dma_alloc(dev, &c->dlct, 8192)) {
201                 i2o_pci_free(c);
202                 return -ENOMEM;
203         }
204
205         if (i2o_dma_alloc(dev, &c->status_block, sizeof(i2o_status_block))) {
206                 i2o_pci_free(c);
207                 return -ENOMEM;
208         }
209
210         if (i2o_dma_alloc(dev, &c->out_queue,
211                 I2O_MAX_OUTBOUND_MSG_FRAMES * I2O_OUTBOUND_MSG_FRAME_SIZE *
212                                 sizeof(u32))) {
213                 i2o_pci_free(c);
214                 return -ENOMEM;
215         }
216
217         pci_set_drvdata(pdev, c);
218
219         return 0;
220 }
221
222 /**
223  *      i2o_pci_interrupt - Interrupt handler for I2O controller
224  *      @irq: interrupt line
225  *      @dev_id: pointer to the I2O controller
226  *
227  *      Handle an interrupt from a PCI based I2O controller. This turns out
228  *      to be rather simple. We keep the controller pointer in the cookie.
229  */
230 static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id)
231 {
232         struct i2o_controller *c = dev_id;
233         u32 m;
234         irqreturn_t rc = IRQ_NONE;
235
236         while (readl(c->irq_status) & I2O_IRQ_OUTBOUND_POST) {
237                 m = readl(c->out_port);
238                 if (m == I2O_QUEUE_EMPTY) {
239                         /*
240                          * Old 960 steppings had a bug in the I2O unit that
241                          * caused the queue to appear empty when it wasn't.
242                          */
243                         m = readl(c->out_port);
244                         if (unlikely(m == I2O_QUEUE_EMPTY))
245                                 break;
246                 }
247
248                 /* dispatch it */
249                 if (i2o_driver_dispatch(c, m))
250                         /* flush it if result != 0 */
251                         i2o_flush_reply(c, m);
252
253                 rc = IRQ_HANDLED;
254         }
255
256         return rc;
257 }
258
259 /**
260  *      i2o_pci_irq_enable - Allocate interrupt for I2O controller
261  *      @c: i2o_controller that the request is for
262  *
263  *      Allocate an interrupt for the I2O controller, and activate interrupts
264  *      on the I2O controller.
265  *
266  *      Returns 0 on success or negative error code on failure.
267  */
268 static int i2o_pci_irq_enable(struct i2o_controller *c)
269 {
270         struct pci_dev *pdev = c->pdev;
271         int rc;
272
273         writel(0xffffffff, c->irq_mask);
274
275         if (pdev->irq) {
276                 rc = request_irq(pdev->irq, i2o_pci_interrupt, IRQF_SHARED,
277                                  c->name, c);
278                 if (rc < 0) {
279                         printk(KERN_ERR "%s: unable to allocate interrupt %d."
280                                "\n", c->name, pdev->irq);
281                         return rc;
282                 }
283         }
284
285         writel(0x00000000, c->irq_mask);
286
287         printk(KERN_INFO "%s: Installed at IRQ %d\n", c->name, pdev->irq);
288
289         return 0;
290 }
291
292 /**
293  *      i2o_pci_irq_disable - Free interrupt for I2O controller
294  *      @c: I2O controller
295  *
296  *      Disable interrupts in I2O controller and then free interrupt.
297  */
298 static void i2o_pci_irq_disable(struct i2o_controller *c)
299 {
300         writel(0xffffffff, c->irq_mask);
301
302         if (c->pdev->irq > 0)
303                 free_irq(c->pdev->irq, c);
304 }
305
306 /**
307  *      i2o_pci_probe - Probe the PCI device for an I2O controller
308  *      @pdev: PCI device to test
309  *      @id: id which matched with the PCI device id table
310  *
311  *      Probe the PCI device for any device which is a memory of the
312  *      Intelligent, I2O class or an Adaptec Zero Channel Controller. We
313  *      attempt to set up each such device and register it with the core.
314  *
315  *      Returns 0 on success or negative error code on failure.
316  */
317 static int __devinit i2o_pci_probe(struct pci_dev *pdev,
318                                    const struct pci_device_id *id)
319 {
320         struct i2o_controller *c;
321         int rc;
322         struct pci_dev *i960 = NULL;
323
324         printk(KERN_INFO "i2o: Checking for PCI I2O controllers...\n");
325
326         if ((pdev->class & 0xff) > 1) {
327                 printk(KERN_WARNING "i2o: %s does not support I2O 1.5 "
328                        "(skipping).\n", pci_name(pdev));
329                 return -ENODEV;
330         }
331
332         if ((rc = pci_enable_device(pdev))) {
333                 printk(KERN_WARNING "i2o: couldn't enable device %s\n",
334                        pci_name(pdev));
335                 return rc;
336         }
337
338         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
339                 printk(KERN_WARNING "i2o: no suitable DMA found for %s\n",
340                        pci_name(pdev));
341                 rc = -ENODEV;
342                 goto disable;
343         }
344
345         pci_set_master(pdev);
346
347         c = i2o_iop_alloc();
348         if (IS_ERR(c)) {
349                 printk(KERN_ERR "i2o: couldn't allocate memory for %s\n",
350                        pci_name(pdev));
351                 rc = PTR_ERR(c);
352                 goto disable;
353         } else
354                 printk(KERN_INFO "%s: controller found (%s)\n", c->name,
355                        pci_name(pdev));
356
357         c->pdev = pdev;
358         c->device.parent = &pdev->dev;
359
360         /* Cards that fall apart if you hit them with large I/O loads... */
361         if (pdev->vendor == PCI_VENDOR_ID_NCR && pdev->device == 0x0630) {
362                 c->short_req = 1;
363                 printk(KERN_INFO "%s: Symbios FC920 workarounds activated.\n",
364                        c->name);
365         }
366
367         if (pdev->subsystem_vendor == PCI_VENDOR_ID_PROMISE) {
368                 /*
369                  * Expose the ship behind i960 for initialization, or it will
370                  * failed
371                  */
372                 i960 = pci_get_slot(c->pdev->bus,
373                                   PCI_DEVFN(PCI_SLOT(c->pdev->devfn), 0));
374
375                 if (i960) {
376                         pci_write_config_word(i960, 0x42, 0);
377                         pci_dev_put(i960);
378                 }
379
380                 c->promise = 1;
381                 c->limit_sectors = 1;
382         }
383
384         if (pdev->subsystem_vendor == PCI_VENDOR_ID_DPT)
385                 c->adaptec = 1;
386
387         /* Cards that go bananas if you quiesce them before you reset them. */
388         if (pdev->vendor == PCI_VENDOR_ID_DPT) {
389                 c->no_quiesce = 1;
390                 if (pdev->device == 0xa511)
391                         c->raptor = 1;
392
393                 if (pdev->subsystem_device == 0xc05a) {
394                         c->limit_sectors = 1;
395                         printk(KERN_INFO
396                                "%s: limit sectors per request to %d\n", c->name,
397                                I2O_MAX_SECTORS_LIMITED);
398                 }
399 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
400                 if (sizeof(dma_addr_t) > 4) {
401                         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
402                                 printk(KERN_INFO "%s: 64-bit DMA unavailable\n",
403                                        c->name);
404                         else {
405                                 c->pae_support = 1;
406                                 printk(KERN_INFO "%s: using 64-bit DMA\n",
407                                        c->name);
408                         }
409                 }
410 #endif
411         }
412
413         if ((rc = i2o_pci_alloc(c))) {
414                 printk(KERN_ERR "%s: DMA / IO allocation for I2O controller "
415                        "failed\n", c->name);
416                 goto free_controller;
417         }
418
419         if (i2o_pci_irq_enable(c)) {
420                 printk(KERN_ERR "%s: unable to enable interrupts for I2O "
421                        "controller\n", c->name);
422                 goto free_pci;
423         }
424
425         if ((rc = i2o_iop_add(c)))
426                 goto uninstall;
427
428         if (i960)
429                 pci_write_config_word(i960, 0x42, 0x03ff);
430
431         return 0;
432
433       uninstall:
434         i2o_pci_irq_disable(c);
435
436       free_pci:
437         i2o_pci_free(c);
438
439       free_controller:
440         i2o_iop_free(c);
441
442       disable:
443         pci_disable_device(pdev);
444
445         return rc;
446 }
447
448 /**
449  *      i2o_pci_remove - Removes a I2O controller from the system
450  *      @pdev: I2O controller which should be removed
451  *
452  *      Reset the I2O controller, disable interrupts and remove all allocated
453  *      resources.
454  */
455 static void __devexit i2o_pci_remove(struct pci_dev *pdev)
456 {
457         struct i2o_controller *c;
458         c = pci_get_drvdata(pdev);
459
460         i2o_iop_remove(c);
461         i2o_pci_irq_disable(c);
462         i2o_pci_free(c);
463
464         pci_disable_device(pdev);
465
466         printk(KERN_INFO "%s: Controller removed.\n", c->name);
467
468         put_device(&c->device);
469 };
470
471 /* PCI driver for I2O controller */
472 static struct pci_driver i2o_pci_driver = {
473         .name = "PCI_I2O",
474         .id_table = i2o_pci_ids,
475         .probe = i2o_pci_probe,
476         .remove = __devexit_p(i2o_pci_remove),
477 };
478
479 /**
480  *      i2o_pci_init - registers I2O PCI driver in PCI subsystem
481  *
482  *      Returns > 0 on success or negative error code on failure.
483  */
484 int __init i2o_pci_init(void)
485 {
486         return pci_register_driver(&i2o_pci_driver);
487 };
488
489 /**
490  *      i2o_pci_exit - unregisters I2O PCI driver from PCI subsystem
491  */
492 void __exit i2o_pci_exit(void)
493 {
494         pci_unregister_driver(&i2o_pci_driver);
495 };
496
497 MODULE_DEVICE_TABLE(pci, i2o_pci_ids);