1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
13 * disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #ifndef _LINUX_PCI_H_
31 #define _LINUX_PCI_H_
32
33 #define CONFIG_PCI_MSI
34
35 #include <linux/types.h>
36
37 #include <sys/param.h>
38 #include <sys/bus.h>
39 #include <sys/pciio.h>
40 #include <sys/rman.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
43 #include <dev/pci/pci_private.h>
44
45 #include <machine/resource.h>
46
47 #include <linux/list.h>
48 #include <linux/dmapool.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/compiler.h>
51 #include <linux/errno.h>
52 #include <asm/atomic.h>
53 #include <linux/device.h>
54
55 struct pci_device_id {
56 uint32_t vendor;
57 uint32_t device;
58 uint32_t subvendor;
59 uint32_t subdevice;
60 uint32_t class_mask;
61 uintptr_t driver_data;
62 };
63
64 #define MODULE_DEVICE_TABLE(bus, table)
65 #define PCI_ANY_ID (-1)
66 #define PCI_VENDOR_ID_MELLANOX 0x15b3
67 #define PCI_VENDOR_ID_TOPSPIN 0x1867
68 #define PCI_DEVICE_ID_MELLANOX_TAVOR 0x5a44
69 #define PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE 0x5a46
70 #define PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT 0x6278
71 #define PCI_DEVICE_ID_MELLANOX_ARBEL 0x6282
72 #define PCI_DEVICE_ID_MELLANOX_SINAI_OLD 0x5e8c
73 #define PCI_DEVICE_ID_MELLANOX_SINAI 0x6274
74
75 #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
76 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
77 #define PCI_FUNC(devfn) ((devfn) & 0x07)
78
79 #define PCI_VDEVICE(_vendor, _device) \
80 .vendor = PCI_VENDOR_ID_##_vendor, .device = (_device), \
81 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
82 #define PCI_DEVICE(_vendor, _device) \
83 .vendor = (_vendor), .device = (_device), \
84 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
85
86 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
87
88 #define PCI_VENDOR_ID PCIR_DEVVENDOR
89 #define PCI_COMMAND PCIR_COMMAND
90 #define PCI_EXP_DEVCTL PCIER_DEVICE_CTL /* Device Control */
91 #define PCI_EXP_LNKCTL PCIER_LINK_CTL /* Link Control */
92 #define PCI_EXP_FLAGS_TYPE PCIEM_FLAGS_TYPE /* Device/Port type */
93 #define PCI_EXP_DEVCAP PCIER_DEVICE_CAP /* Device capabilities */
94 #define PCI_EXP_DEVSTA PCIER_DEVICE_STA /* Device Status */
95 #define PCI_EXP_LNKCAP PCIER_LINK_CAP /* Link Capabilities */
96 #define PCI_EXP_LNKSTA PCIER_LINK_STA /* Link Status */
97 #define PCI_EXP_SLTCAP PCIER_SLOT_CAP /* Slot Capabilities */
98 #define PCI_EXP_SLTCTL PCIER_SLOT_CTL /* Slot Control */
99 #define PCI_EXP_SLTSTA PCIER_SLOT_STA /* Slot Status */
100 #define PCI_EXP_RTCTL PCIER_ROOT_CTL /* Root Control */
101 #define PCI_EXP_RTCAP PCIER_ROOT_CAP /* Root Capabilities */
102 #define PCI_EXP_RTSTA PCIER_ROOT_STA /* Root Status */
103 #define PCI_EXP_DEVCAP2 PCIER_DEVICE_CAP2 /* Device Capabilities 2 */
104 #define PCI_EXP_DEVCTL2 PCIER_DEVICE_CTL2 /* Device Control 2 */
105 #define PCI_EXP_LNKCAP2 PCIER_LINK_CAP2 /* Link Capabilities 2 */
106 #define PCI_EXP_LNKCTL2 PCIER_LINK_CTL2 /* Link Control 2 */
107 #define PCI_EXP_LNKSTA2 PCIER_LINK_STA2 /* Link Status 2 */
108 #define PCI_EXP_FLAGS PCIER_FLAGS /* Capabilities register */
109 #define PCI_EXP_FLAGS_VERS PCIEM_FLAGS_VERSION /* Capability version */
110 #define PCI_EXP_TYPE_ROOT_PORT PCIEM_TYPE_ROOT_PORT /* Root Port */
111 #define PCI_EXP_TYPE_ENDPOINT PCIEM_TYPE_ENDPOINT /* Express Endpoint */
112 #define PCI_EXP_TYPE_LEG_END PCIEM_TYPE_LEGACY_ENDPOINT /* Legacy Endpoint */
113 #define PCI_EXP_TYPE_DOWNSTREAM PCIEM_TYPE_DOWNSTREAM_PORT /* Downstream Port */
114 #define PCI_EXP_FLAGS_SLOT PCIEM_FLAGS_SLOT /* Slot implemented */
115 #define PCI_EXP_TYPE_RC_EC PCIEM_TYPE_ROOT_EC /* Root Complex Event Collector */
116
117
118 #define IORESOURCE_MEM SYS_RES_MEMORY
119 #define IORESOURCE_IO SYS_RES_IOPORT
120 #define IORESOURCE_IRQ SYS_RES_IRQ
121
122 struct pci_dev;
123
124
125 struct pci_driver {
126 struct list_head links;
127 char *name;
128 const struct pci_device_id *id_table;
129 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id);
130 void (*remove)(struct pci_dev *dev);
131 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
132 int (*resume) (struct pci_dev *dev); /* Device woken up */
133 driver_t driver;
134 devclass_t bsdclass;
135 const struct pci_error_handlers *err_handler;
136 };
137
138 extern struct list_head pci_drivers;
139 extern struct list_head pci_devices;
140 extern spinlock_t pci_lock;
141
142 #define __devexit_p(x) x
143
144 struct pci_dev {
145 struct device dev;
146 struct list_head links;
147 struct pci_driver *pdrv;
148 uint64_t dma_mask;
149 uint16_t device;
150 uint16_t vendor;
151 unsigned int irq;
152 unsigned int devfn;
153 u8 revision;
154 };
155
156 static inline struct resource_list_entry *
_pci_get_rle(struct pci_dev * pdev,int type,int rid)157 _pci_get_rle(struct pci_dev *pdev, int type, int rid)
158 {
159 struct pci_devinfo *dinfo;
160 struct resource_list *rl;
161
162 dinfo = device_get_ivars(pdev->dev.bsddev);
163 rl = &dinfo->resources;
164 return resource_list_find(rl, type, rid);
165 }
166
167 static inline struct resource_list_entry *
_pci_get_bar(struct pci_dev * pdev,int bar)168 _pci_get_bar(struct pci_dev *pdev, int bar)
169 {
170 struct resource_list_entry *rle;
171
172 bar = PCIR_BAR(bar);
173 if ((rle = _pci_get_rle(pdev, SYS_RES_MEMORY, bar)) == NULL)
174 rle = _pci_get_rle(pdev, SYS_RES_IOPORT, bar);
175 return (rle);
176 }
177
178 static inline struct device *
_pci_find_irq_dev(unsigned int irq)179 _pci_find_irq_dev(unsigned int irq)
180 {
181 struct pci_dev *pdev;
182
183 spin_lock(&pci_lock);
184 list_for_each_entry(pdev, &pci_devices, links) {
185 if (irq == pdev->dev.irq)
186 break;
187 if (irq >= pdev->dev.msix && irq < pdev->dev.msix_max)
188 break;
189 }
190 spin_unlock(&pci_lock);
191 if (pdev)
192 return &pdev->dev;
193 return (NULL);
194 }
195
196 static inline unsigned long
pci_resource_start(struct pci_dev * pdev,int bar)197 pci_resource_start(struct pci_dev *pdev, int bar)
198 {
199 struct resource_list_entry *rle;
200
201 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
202 return (0);
203 return rle->start;
204 }
205
206 static inline unsigned long
pci_resource_len(struct pci_dev * pdev,int bar)207 pci_resource_len(struct pci_dev *pdev, int bar)
208 {
209 struct resource_list_entry *rle;
210
211 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
212 return (0);
213 return rle->count;
214 }
215
216 /*
217 * All drivers just seem to want to inspect the type not flags.
218 */
219 static inline int
pci_resource_flags(struct pci_dev * pdev,int bar)220 pci_resource_flags(struct pci_dev *pdev, int bar)
221 {
222 struct resource_list_entry *rle;
223
224 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
225 return (0);
226 return rle->type;
227 }
228
229 static inline const char *
pci_name(struct pci_dev * d)230 pci_name(struct pci_dev *d)
231 {
232
233 return device_get_desc(d->dev.bsddev);
234 }
235
236 static inline void *
pci_get_drvdata(struct pci_dev * pdev)237 pci_get_drvdata(struct pci_dev *pdev)
238 {
239
240 return dev_get_drvdata(&pdev->dev);
241 }
242
243 static inline void
pci_set_drvdata(struct pci_dev * pdev,void * data)244 pci_set_drvdata(struct pci_dev *pdev, void *data)
245 {
246
247 dev_set_drvdata(&pdev->dev, data);
248 }
249
250 static inline int
pci_enable_device(struct pci_dev * pdev)251 pci_enable_device(struct pci_dev *pdev)
252 {
253
254 pci_enable_io(pdev->dev.bsddev, SYS_RES_IOPORT);
255 pci_enable_io(pdev->dev.bsddev, SYS_RES_MEMORY);
256 return (0);
257 }
258
259 static inline void
pci_disable_device(struct pci_dev * pdev)260 pci_disable_device(struct pci_dev *pdev)
261 {
262 }
263
264 static inline int
pci_set_master(struct pci_dev * pdev)265 pci_set_master(struct pci_dev *pdev)
266 {
267
268 pci_enable_busmaster(pdev->dev.bsddev);
269 return (0);
270 }
271
272 static inline int
pci_clear_master(struct pci_dev * pdev)273 pci_clear_master(struct pci_dev *pdev)
274 {
275
276 pci_disable_busmaster(pdev->dev.bsddev);
277 return (0);
278 }
279
280 static inline int
pci_request_region(struct pci_dev * pdev,int bar,const char * res_name)281 pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
282 {
283 int rid;
284 int type;
285
286 type = pci_resource_flags(pdev, bar);
287 if (type == 0)
288 return (-ENODEV);
289 rid = PCIR_BAR(bar);
290 if (bus_alloc_resource_any(pdev->dev.bsddev, type, &rid,
291 RF_ACTIVE) == NULL)
292 return (-EINVAL);
293 return (0);
294 }
295
296 static inline void
pci_release_region(struct pci_dev * pdev,int bar)297 pci_release_region(struct pci_dev *pdev, int bar)
298 {
299 struct resource_list_entry *rle;
300
301 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
302 return;
303 bus_release_resource(pdev->dev.bsddev, rle->type, rle->rid, rle->res);
304 }
305
306 static inline void
pci_release_regions(struct pci_dev * pdev)307 pci_release_regions(struct pci_dev *pdev)
308 {
309 int i;
310
311 for (i = 0; i <= PCIR_MAX_BAR_0; i++)
312 pci_release_region(pdev, i);
313 }
314
315 static inline int
pci_request_regions(struct pci_dev * pdev,const char * res_name)316 pci_request_regions(struct pci_dev *pdev, const char *res_name)
317 {
318 int error;
319 int i;
320
321 for (i = 0; i <= PCIR_MAX_BAR_0; i++) {
322 error = pci_request_region(pdev, i, res_name);
323 if (error && error != -ENODEV) {
324 pci_release_regions(pdev);
325 return (error);
326 }
327 }
328 return (0);
329 }
330
331 static inline void
pci_disable_msix(struct pci_dev * pdev)332 pci_disable_msix(struct pci_dev *pdev)
333 {
334
335 pci_release_msi(pdev->dev.bsddev);
336 }
337
338 #define PCI_CAP_ID_EXP PCIY_EXPRESS
339 #define PCI_CAP_ID_PCIX PCIY_PCIX
340
341
342 static inline int
pci_find_capability(struct pci_dev * pdev,int capid)343 pci_find_capability(struct pci_dev *pdev, int capid)
344 {
345 int reg;
346
347 if (pci_find_cap(pdev->dev.bsddev, capid, ®))
348 return (0);
349 return (reg);
350 }
351
352
353
354
355 /**
356 * pci_pcie_cap - get the saved PCIe capability offset
357 * @dev: PCI device
358 *
359 * PCIe capability offset is calculated at PCI device initialization
360 * time and saved in the data structure. This function returns saved
361 * PCIe capability offset. Using this instead of pci_find_capability()
362 * reduces unnecessary search in the PCI configuration space. If you
363 * need to calculate PCIe capability offset from raw device for some
364 * reasons, please use pci_find_capability() instead.
365 */
pci_pcie_cap(struct pci_dev * dev)366 static inline int pci_pcie_cap(struct pci_dev *dev)
367 {
368 return pci_find_capability(dev, PCI_CAP_ID_EXP);
369 }
370
371
372 static inline int
pci_read_config_byte(struct pci_dev * pdev,int where,u8 * val)373 pci_read_config_byte(struct pci_dev *pdev, int where, u8 *val)
374 {
375
376 *val = (u8)pci_read_config(pdev->dev.bsddev, where, 1);
377 return (0);
378 }
379
380 static inline int
pci_read_config_word(struct pci_dev * pdev,int where,u16 * val)381 pci_read_config_word(struct pci_dev *pdev, int where, u16 *val)
382 {
383
384 *val = (u16)pci_read_config(pdev->dev.bsddev, where, 2);
385 return (0);
386 }
387
388 static inline int
pci_read_config_dword(struct pci_dev * pdev,int where,u32 * val)389 pci_read_config_dword(struct pci_dev *pdev, int where, u32 *val)
390 {
391
392 *val = (u32)pci_read_config(pdev->dev.bsddev, where, 4);
393 return (0);
394 }
395
396 static inline int
pci_write_config_byte(struct pci_dev * pdev,int where,u8 val)397 pci_write_config_byte(struct pci_dev *pdev, int where, u8 val)
398 {
399
400 pci_write_config(pdev->dev.bsddev, where, val, 1);
401 return (0);
402 }
403
404 static inline int
pci_write_config_word(struct pci_dev * pdev,int where,u16 val)405 pci_write_config_word(struct pci_dev *pdev, int where, u16 val)
406 {
407
408 pci_write_config(pdev->dev.bsddev, where, val, 2);
409 return (0);
410 }
411
412 static inline int
pci_write_config_dword(struct pci_dev * pdev,int where,u32 val)413 pci_write_config_dword(struct pci_dev *pdev, int where, u32 val)
414 {
415
416 pci_write_config(pdev->dev.bsddev, where, val, 4);
417 return (0);
418 }
419
420 static struct pci_driver *
linux_pci_find(device_t dev,const struct pci_device_id ** idp)421 linux_pci_find(device_t dev, const struct pci_device_id **idp)
422 {
423 const struct pci_device_id *id;
424 struct pci_driver *pdrv;
425 uint16_t vendor;
426 uint16_t device;
427
428 vendor = pci_get_vendor(dev);
429 device = pci_get_device(dev);
430
431 spin_lock(&pci_lock);
432 list_for_each_entry(pdrv, &pci_drivers, links) {
433 for (id = pdrv->id_table; id->vendor != 0; id++) {
434 if (vendor == id->vendor && device == id->device) {
435 *idp = id;
436 spin_unlock(&pci_lock);
437 return (pdrv);
438 }
439 }
440 }
441 spin_unlock(&pci_lock);
442 return (NULL);
443 }
444
445 static inline int
linux_pci_probe(device_t dev)446 linux_pci_probe(device_t dev)
447 {
448 const struct pci_device_id *id;
449 struct pci_driver *pdrv;
450
451 if ((pdrv = linux_pci_find(dev, &id)) == NULL)
452 return (ENXIO);
453 if (device_get_driver(dev) != &pdrv->driver)
454 return (ENXIO);
455 device_set_desc(dev, pdrv->name);
456 return (0);
457 }
458
459 static inline int
linux_pci_attach(device_t dev)460 linux_pci_attach(device_t dev)
461 {
462 struct resource_list_entry *rle;
463 struct pci_dev *pdev;
464 struct pci_driver *pdrv;
465 const struct pci_device_id *id;
466 int error;
467
468 pdrv = linux_pci_find(dev, &id);
469 pdev = device_get_softc(dev);
470 pdev->dev.parent = &linux_rootdev;
471 pdev->dev.bsddev = dev;
472 INIT_LIST_HEAD(&pdev->dev.irqents);
473 pdev->device = id->device;
474 pdev->vendor = id->vendor;
475 pdev->dev.dma_mask = &pdev->dma_mask;
476 pdev->pdrv = pdrv;
477 kobject_init(&pdev->dev.kobj, &dev_ktype);
478 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev));
479 kobject_add(&pdev->dev.kobj, &linux_rootdev.kobj,
480 kobject_name(&pdev->dev.kobj));
481 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 0);
482 if (rle)
483 pdev->dev.irq = rle->start;
484 else
485 pdev->dev.irq = 0;
486 pdev->irq = pdev->dev.irq;
487 mtx_unlock(&Giant);
488 spin_lock(&pci_lock);
489 list_add(&pdev->links, &pci_devices);
490 spin_unlock(&pci_lock);
491 error = pdrv->probe(pdev, id);
492 mtx_lock(&Giant);
493 if (error) {
494 spin_lock(&pci_lock);
495 list_del(&pdev->links);
496 spin_unlock(&pci_lock);
497 put_device(&pdev->dev);
498 return (-error);
499 }
500 return (0);
501 }
502
503 static inline int
linux_pci_detach(device_t dev)504 linux_pci_detach(device_t dev)
505 {
506 struct pci_dev *pdev;
507
508 pdev = device_get_softc(dev);
509 mtx_unlock(&Giant);
510 pdev->pdrv->remove(pdev);
511 mtx_lock(&Giant);
512 spin_lock(&pci_lock);
513 list_del(&pdev->links);
514 spin_unlock(&pci_lock);
515 put_device(&pdev->dev);
516
517 return (0);
518 }
519
520 static device_method_t pci_methods[] = {
521 DEVMETHOD(device_probe, linux_pci_probe),
522 DEVMETHOD(device_attach, linux_pci_attach),
523 DEVMETHOD(device_detach, linux_pci_detach),
524 {0, 0}
525 };
526
527 static inline int
pci_register_driver(struct pci_driver * pdrv)528 pci_register_driver(struct pci_driver *pdrv)
529 {
530 devclass_t bus;
531 int error;
532
533 spin_lock(&pci_lock);
534 list_add(&pdrv->links, &pci_drivers);
535 spin_unlock(&pci_lock);
536 bus = devclass_find("pci");
537 pdrv->driver.name = pdrv->name;
538 pdrv->driver.methods = pci_methods;
539 pdrv->driver.size = sizeof(struct pci_dev);
540 mtx_lock(&Giant);
541 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT,
542 &pdrv->bsdclass);
543 mtx_unlock(&Giant);
544 if (error)
545 return (-error);
546 return (0);
547 }
548
549 static inline void
pci_unregister_driver(struct pci_driver * pdrv)550 pci_unregister_driver(struct pci_driver *pdrv)
551 {
552 devclass_t bus;
553
554 list_del(&pdrv->links);
555 bus = devclass_find("pci");
556 mtx_lock(&Giant);
557 devclass_delete_driver(bus, &pdrv->driver);
558 mtx_unlock(&Giant);
559 }
560
561 struct msix_entry {
562 int entry;
563 int vector;
564 };
565
566 /*
567 * Enable msix, positive errors indicate actual number of available
568 * vectors. Negative errors are failures.
569 */
570 static inline int
pci_enable_msix(struct pci_dev * pdev,struct msix_entry * entries,int nreq)571 pci_enable_msix(struct pci_dev *pdev, struct msix_entry *entries, int nreq)
572 {
573 struct resource_list_entry *rle;
574 int error;
575 int avail;
576 int i;
577
578 avail = pci_msix_count(pdev->dev.bsddev);
579 if (avail < nreq) {
580 if (avail == 0)
581 return -EINVAL;
582 return avail;
583 }
584 avail = nreq;
585 if ((error = -pci_alloc_msix(pdev->dev.bsddev, &avail)) != 0)
586 return error;
587 /*
588 * Handle case where "pci_alloc_msix()" may allocate less
589 * interrupts than available and return with no error:
590 */
591 if (avail < nreq) {
592 pci_release_msi(pdev->dev.bsddev);
593 return avail;
594 }
595 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 1);
596 pdev->dev.msix = rle->start;
597 pdev->dev.msix_max = rle->start + avail;
598 for (i = 0; i < nreq; i++)
599 entries[i].vector = pdev->dev.msix + i;
600 return (0);
601 }
602
603 #define pci_enable_msix_range linux_pci_enable_msix_range
604 static inline int
pci_enable_msix_range(struct pci_dev * dev,struct msix_entry * entries,int minvec,int maxvec)605 pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
606 int minvec, int maxvec)
607 {
608 int nvec = maxvec;
609 int rc;
610
611 if (maxvec < minvec)
612 return (-ERANGE);
613
614 do {
615 rc = pci_enable_msix(dev, entries, nvec);
616 if (rc < 0) {
617 return (rc);
618 } else if (rc > 0) {
619 if (rc < minvec)
620 return (-ENOSPC);
621 nvec = rc;
622 }
623 } while (rc);
624 return (nvec);
625 }
626
pci_channel_offline(struct pci_dev * pdev)627 static inline int pci_channel_offline(struct pci_dev *pdev)
628 {
629 return false;
630 }
631
pci_enable_sriov(struct pci_dev * dev,int nr_virtfn)632 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
633 {
634 return -ENODEV;
635 }
pci_disable_sriov(struct pci_dev * dev)636 static inline void pci_disable_sriov(struct pci_dev *dev)
637 {
638 }
639
640 /**
641 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
642 * @_table: device table name
643 *
644 * This macro is used to create a struct pci_device_id array (a device table)
645 * in a generic manner.
646 */
647 #define DEFINE_PCI_DEVICE_TABLE(_table) \
648 const struct pci_device_id _table[] __devinitdata
649
650
651 /* XXX This should not be necessary. */
652 #define pcix_set_mmrbc(d, v) 0
653 #define pcix_get_max_mmrbc(d) 0
654 #define pcie_set_readrq(d, v) 0
655
656 #define PCI_DMA_BIDIRECTIONAL 0
657 #define PCI_DMA_TODEVICE 1
658 #define PCI_DMA_FROMDEVICE 2
659 #define PCI_DMA_NONE 3
660
661 #define pci_pool dma_pool
662 #define pci_pool_destroy dma_pool_destroy
663 #define pci_pool_alloc dma_pool_alloc
664 #define pci_pool_free dma_pool_free
665 #define pci_pool_create(_name, _pdev, _size, _align, _alloc) \
666 dma_pool_create(_name, &(_pdev)->dev, _size, _align, _alloc)
667 #define pci_free_consistent(_hwdev, _size, _vaddr, _dma_handle) \
668 dma_free_coherent((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
669 _size, _vaddr, _dma_handle)
670 #define pci_map_sg(_hwdev, _sg, _nents, _dir) \
671 dma_map_sg((_hwdev) == NULL ? NULL : &(_hwdev->dev), \
672 _sg, _nents, (enum dma_data_direction)_dir)
673 #define pci_map_single(_hwdev, _ptr, _size, _dir) \
674 dma_map_single((_hwdev) == NULL ? NULL : &(_hwdev->dev), \
675 (_ptr), (_size), (enum dma_data_direction)_dir)
676 #define pci_unmap_single(_hwdev, _addr, _size, _dir) \
677 dma_unmap_single((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
678 _addr, _size, (enum dma_data_direction)_dir)
679 #define pci_unmap_sg(_hwdev, _sg, _nents, _dir) \
680 dma_unmap_sg((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
681 _sg, _nents, (enum dma_data_direction)_dir)
682 #define pci_map_page(_hwdev, _page, _offset, _size, _dir) \
683 dma_map_page((_hwdev) == NULL ? NULL : &(_hwdev)->dev, _page,\
684 _offset, _size, (enum dma_data_direction)_dir)
685 #define pci_unmap_page(_hwdev, _dma_address, _size, _dir) \
686 dma_unmap_page((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
687 _dma_address, _size, (enum dma_data_direction)_dir)
688 #define pci_set_dma_mask(_pdev, mask) dma_set_mask(&(_pdev)->dev, (mask))
689 #define pci_dma_mapping_error(_pdev, _dma_addr) \
690 dma_mapping_error(&(_pdev)->dev, _dma_addr)
691 #define pci_set_consistent_dma_mask(_pdev, _mask) \
692 dma_set_coherent_mask(&(_pdev)->dev, (_mask))
693 #define DECLARE_PCI_UNMAP_ADDR(x) DEFINE_DMA_UNMAP_ADDR(x);
694 #define DECLARE_PCI_UNMAP_LEN(x) DEFINE_DMA_UNMAP_LEN(x);
695 #define pci_unmap_addr dma_unmap_addr
696 #define pci_unmap_addr_set dma_unmap_addr_set
697 #define pci_unmap_len dma_unmap_len
698 #define pci_unmap_len_set dma_unmap_len_set
699
700 typedef unsigned int __bitwise pci_channel_state_t;
701 typedef unsigned int __bitwise pci_ers_result_t;
702
703 enum pci_channel_state {
704 /* I/O channel is in normal state */
705 pci_channel_io_normal = (__force pci_channel_state_t) 1,
706
707 /* I/O to channel is blocked */
708 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
709
710 /* PCI card is dead */
711 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
712 };
713
714 enum pci_ers_result {
715 /* no result/none/not supported in device driver */
716 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
717
718 /* Device driver can recover without slot reset */
719 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
720
721 /* Device driver wants slot to be reset. */
722 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
723
724 /* Device has completely failed, is unrecoverable */
725 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
726
727 /* Device driver is fully recovered and operational */
728 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
729 };
730
731
732 /* PCI bus error event callbacks */
733 struct pci_error_handlers {
734 /* PCI bus error detected on this device */
735 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
736 enum pci_channel_state error);
737
738 /* MMIO has been re-enabled, but not DMA */
739 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
740
741 /* PCI Express link has been reset */
742 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
743
744 /* PCI slot has been reset */
745 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
746
747 /* Device driver may resume normal operations */
748 void (*resume)(struct pci_dev *dev);
749 };
750
751 /* freeBSD does not support SRIOV - yet */
pci_physfn(struct pci_dev * dev)752 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
753 {
754 return dev;
755 }
756
pci_is_pcie(struct pci_dev * dev)757 static inline bool pci_is_pcie(struct pci_dev *dev)
758 {
759 return !!pci_pcie_cap(dev);
760 }
761
pcie_flags_reg(struct pci_dev * dev)762 static inline u16 pcie_flags_reg(struct pci_dev *dev)
763 {
764 int pos;
765 u16 reg16;
766
767 pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
768 if (!pos)
769 return 0;
770
771 pci_read_config_word(dev, pos + PCI_EXP_FLAGS, ®16);
772
773 return reg16;
774 }
775
776
pci_pcie_type(struct pci_dev * dev)777 static inline int pci_pcie_type(struct pci_dev *dev)
778 {
779 return (pcie_flags_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
780 }
781
pcie_cap_version(struct pci_dev * dev)782 static inline int pcie_cap_version(struct pci_dev *dev)
783 {
784 return pcie_flags_reg(dev) & PCI_EXP_FLAGS_VERS;
785 }
786
pcie_cap_has_lnkctl(struct pci_dev * dev)787 static inline bool pcie_cap_has_lnkctl(struct pci_dev *dev)
788 {
789 int type = pci_pcie_type(dev);
790
791 return pcie_cap_version(dev) > 1 ||
792 type == PCI_EXP_TYPE_ROOT_PORT ||
793 type == PCI_EXP_TYPE_ENDPOINT ||
794 type == PCI_EXP_TYPE_LEG_END;
795 }
796
pcie_cap_has_devctl(const struct pci_dev * dev)797 static inline bool pcie_cap_has_devctl(const struct pci_dev *dev)
798 {
799 return true;
800 }
801
pcie_cap_has_sltctl(struct pci_dev * dev)802 static inline bool pcie_cap_has_sltctl(struct pci_dev *dev)
803 {
804 int type = pci_pcie_type(dev);
805
806 return pcie_cap_version(dev) > 1 ||
807 type == PCI_EXP_TYPE_ROOT_PORT ||
808 (type == PCI_EXP_TYPE_DOWNSTREAM &&
809 pcie_flags_reg(dev) & PCI_EXP_FLAGS_SLOT);
810 }
811
pcie_cap_has_rtctl(struct pci_dev * dev)812 static inline bool pcie_cap_has_rtctl(struct pci_dev *dev)
813 {
814 int type = pci_pcie_type(dev);
815
816 return pcie_cap_version(dev) > 1 ||
817 type == PCI_EXP_TYPE_ROOT_PORT ||
818 type == PCI_EXP_TYPE_RC_EC;
819 }
820
pcie_capability_reg_implemented(struct pci_dev * dev,int pos)821 static bool pcie_capability_reg_implemented(struct pci_dev *dev, int pos)
822 {
823 if (!pci_is_pcie(dev))
824 return false;
825
826 switch (pos) {
827 case PCI_EXP_FLAGS_TYPE:
828 return true;
829 case PCI_EXP_DEVCAP:
830 case PCI_EXP_DEVCTL:
831 case PCI_EXP_DEVSTA:
832 return pcie_cap_has_devctl(dev);
833 case PCI_EXP_LNKCAP:
834 case PCI_EXP_LNKCTL:
835 case PCI_EXP_LNKSTA:
836 return pcie_cap_has_lnkctl(dev);
837 case PCI_EXP_SLTCAP:
838 case PCI_EXP_SLTCTL:
839 case PCI_EXP_SLTSTA:
840 return pcie_cap_has_sltctl(dev);
841 case PCI_EXP_RTCTL:
842 case PCI_EXP_RTCAP:
843 case PCI_EXP_RTSTA:
844 return pcie_cap_has_rtctl(dev);
845 case PCI_EXP_DEVCAP2:
846 case PCI_EXP_DEVCTL2:
847 case PCI_EXP_LNKCAP2:
848 case PCI_EXP_LNKCTL2:
849 case PCI_EXP_LNKSTA2:
850 return pcie_cap_version(dev) > 1;
851 default:
852 return false;
853 }
854 }
855
856
pcie_capability_write_word(struct pci_dev * dev,int pos,u16 val)857 static inline int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val)
858 {
859 if (pos & 1)
860 return -EINVAL;
861
862 if (!pcie_capability_reg_implemented(dev, pos))
863 return 0;
864
865 return pci_write_config_word(dev, pci_pcie_cap(dev) + pos, val);
866 }
867
868
869 #endif /* _LINUX_PCI_H_ */
870