2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #define CONFIG_PCI_MSI
34 #include <linux/types.h>
36 #include <sys/param.h>
38 #include <sys/pciio.h>
40 #include <dev/pci/pcivar.h>
41 #include <dev/pci/pcireg.h>
42 #include <dev/pci/pci_private.h>
44 #include <machine/resource.h>
46 #include <linux/init.h>
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>
55 struct pci_device_id {
61 uintptr_t driver_data;
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
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)
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
86 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
88 #define PCI_VENDOR_ID PCIR_DEVVENDOR
89 #define PCI_COMMAND PCIR_COMMAND
90 #define PCI_EXP_DEVCTL PCIER_DEVICE_CTL
91 #define PCI_EXP_LNKCTL PCIER_LINK_CTL
93 #define IORESOURCE_MEM SYS_RES_MEMORY
94 #define IORESOURCE_IO SYS_RES_IOPORT
95 #define IORESOURCE_IRQ SYS_RES_IRQ
101 struct list_head links;
103 struct pci_device_id *id_table;
104 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id);
105 void (*remove)(struct pci_dev *dev);
106 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
107 int (*resume) (struct pci_dev *dev); /* Device woken up */
110 struct pci_error_handlers *err_handler;
113 extern struct list_head pci_drivers;
114 extern struct list_head pci_devices;
115 extern spinlock_t pci_lock;
117 #define __devexit_p(x) x
121 struct list_head links;
122 struct pci_driver *pdrv;
129 struct pci_devinfo *bus; /* bus this device is on, equivalent to linux struct pci_bus */
132 static inline struct resource_list_entry *
133 _pci_get_rle(struct pci_dev *pdev, int type, int rid)
135 struct pci_devinfo *dinfo;
136 struct resource_list *rl;
138 dinfo = device_get_ivars(pdev->dev.bsddev);
139 rl = &dinfo->resources;
140 return resource_list_find(rl, type, rid);
143 static inline struct resource_list_entry *
144 _pci_get_bar(struct pci_dev *pdev, int bar)
146 struct resource_list_entry *rle;
149 if ((rle = _pci_get_rle(pdev, SYS_RES_MEMORY, bar)) == NULL)
150 rle = _pci_get_rle(pdev, SYS_RES_IOPORT, bar);
154 static inline struct device *
155 _pci_find_irq_dev(unsigned int irq)
157 struct pci_dev *pdev;
159 spin_lock(&pci_lock);
160 list_for_each_entry(pdev, &pci_devices, links) {
161 if (irq == pdev->dev.irq)
163 if (irq >= pdev->dev.msix && irq < pdev->dev.msix_max)
166 spin_unlock(&pci_lock);
172 static inline unsigned long
173 pci_resource_start(struct pci_dev *pdev, int bar)
175 struct resource_list_entry *rle;
177 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
182 static inline unsigned long
183 pci_resource_len(struct pci_dev *pdev, int bar)
185 struct resource_list_entry *rle;
187 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
193 * All drivers just seem to want to inspect the type not flags.
196 pci_resource_flags(struct pci_dev *pdev, int bar)
198 struct resource_list_entry *rle;
200 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
205 static inline const char *
206 pci_name(struct pci_dev *d)
209 return device_get_desc(d->dev.bsddev);
213 pci_get_drvdata(struct pci_dev *pdev)
216 return dev_get_drvdata(&pdev->dev);
220 pci_set_drvdata(struct pci_dev *pdev, void *data)
223 dev_set_drvdata(&pdev->dev, data);
227 pci_enable_device(struct pci_dev *pdev)
230 pci_enable_io(pdev->dev.bsddev, SYS_RES_IOPORT);
231 pci_enable_io(pdev->dev.bsddev, SYS_RES_MEMORY);
236 pci_disable_device(struct pci_dev *pdev)
241 pci_set_master(struct pci_dev *pdev)
244 pci_enable_busmaster(pdev->dev.bsddev);
249 pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
254 type = pci_resource_flags(pdev, bar);
258 if (bus_alloc_resource_any(pdev->dev.bsddev, type, &rid,
265 pci_release_region(struct pci_dev *pdev, int bar)
267 struct resource_list_entry *rle;
269 if ((rle = _pci_get_bar(pdev, bar)) == NULL)
271 bus_release_resource(pdev->dev.bsddev, rle->type, rle->rid, rle->res);
275 pci_release_regions(struct pci_dev *pdev)
279 for (i = 0; i <= PCIR_MAX_BAR_0; i++)
280 pci_release_region(pdev, i);
284 pci_request_regions(struct pci_dev *pdev, const char *res_name)
289 for (i = 0; i <= PCIR_MAX_BAR_0; i++) {
290 error = pci_request_region(pdev, i, res_name);
291 if (error && error != -ENODEV) {
292 pci_release_regions(pdev);
300 pci_disable_msix(struct pci_dev *pdev)
303 pci_release_msi(pdev->dev.bsddev);
306 #define PCI_CAP_ID_EXP PCIY_EXPRESS
307 #define PCI_CAP_ID_PCIX PCIY_PCIX
311 pci_find_capability(struct pci_dev *pdev, int capid)
315 if (pci_find_cap(pdev->dev.bsddev, capid, ®))
324 * pci_pcie_cap - get the saved PCIe capability offset
327 * PCIe capability offset is calculated at PCI device initialization
328 * time and saved in the data structure. This function returns saved
329 * PCIe capability offset. Using this instead of pci_find_capability()
330 * reduces unnecessary search in the PCI configuration space. If you
331 * need to calculate PCIe capability offset from raw device for some
332 * reasons, please use pci_find_capability() instead.
334 static inline int pci_pcie_cap(struct pci_dev *dev)
336 return pci_find_capability(dev, PCI_CAP_ID_EXP);
341 pci_read_config_byte(struct pci_dev *pdev, int where, u8 *val)
344 *val = (u8)pci_read_config(pdev->dev.bsddev, where, 1);
349 pci_read_config_word(struct pci_dev *pdev, int where, u16 *val)
352 *val = (u16)pci_read_config(pdev->dev.bsddev, where, 2);
357 pci_read_config_dword(struct pci_dev *pdev, int where, u32 *val)
360 *val = (u32)pci_read_config(pdev->dev.bsddev, where, 4);
365 pci_write_config_byte(struct pci_dev *pdev, int where, u8 val)
368 pci_write_config(pdev->dev.bsddev, where, val, 1);
373 pci_write_config_word(struct pci_dev *pdev, int where, u16 val)
376 pci_write_config(pdev->dev.bsddev, where, val, 2);
381 pci_write_config_dword(struct pci_dev *pdev, int where, u32 val)
384 pci_write_config(pdev->dev.bsddev, where, val, 4);
388 static struct pci_driver *
389 linux_pci_find(device_t dev, struct pci_device_id **idp)
391 struct pci_device_id *id;
392 struct pci_driver *pdrv;
396 vendor = pci_get_vendor(dev);
397 device = pci_get_device(dev);
399 spin_lock(&pci_lock);
400 list_for_each_entry(pdrv, &pci_drivers, links) {
401 for (id = pdrv->id_table; id->vendor != 0; id++) {
402 if (vendor == id->vendor && device == id->device) {
404 spin_unlock(&pci_lock);
409 spin_unlock(&pci_lock);
414 linux_pci_probe(device_t dev)
416 struct pci_device_id *id;
417 struct pci_driver *pdrv;
419 if ((pdrv = linux_pci_find(dev, &id)) == NULL)
421 if (device_get_driver(dev) != &pdrv->driver)
423 device_set_desc(dev, pdrv->name);
428 linux_pci_attach(device_t dev)
430 struct resource_list_entry *rle;
431 struct pci_dev *pdev;
432 struct pci_driver *pdrv;
433 struct pci_device_id *id;
436 pdrv = linux_pci_find(dev, &id);
437 pdev = device_get_softc(dev);
438 pdev->dev.parent = &linux_rootdev;
439 pdev->dev.bsddev = dev;
440 INIT_LIST_HEAD(&pdev->dev.irqents);
441 pdev->device = id->device;
442 pdev->vendor = id->vendor;
443 pdev->dev.dma_mask = &pdev->dma_mask;
445 kobject_init(&pdev->dev.kobj, &dev_ktype);
446 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev));
447 kobject_add(&pdev->dev.kobj, &linux_rootdev.kobj,
448 kobject_name(&pdev->dev.kobj));
449 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 0);
451 pdev->dev.irq = rle->start;
454 pdev->irq = pdev->dev.irq;
456 spin_lock(&pci_lock);
457 list_add(&pdev->links, &pci_devices);
458 spin_unlock(&pci_lock);
459 error = pdrv->probe(pdev, id);
462 spin_lock(&pci_lock);
463 list_del(&pdev->links);
464 spin_unlock(&pci_lock);
465 put_device(&pdev->dev);
472 linux_pci_detach(device_t dev)
474 struct pci_dev *pdev;
476 pdev = device_get_softc(dev);
478 pdev->pdrv->remove(pdev);
480 spin_lock(&pci_lock);
481 list_del(&pdev->links);
482 spin_unlock(&pci_lock);
483 put_device(&pdev->dev);
488 static device_method_t pci_methods[] = {
489 DEVMETHOD(device_probe, linux_pci_probe),
490 DEVMETHOD(device_attach, linux_pci_attach),
491 DEVMETHOD(device_detach, linux_pci_detach),
496 pci_register_driver(struct pci_driver *pdrv)
501 spin_lock(&pci_lock);
502 list_add(&pdrv->links, &pci_drivers);
503 spin_unlock(&pci_lock);
504 bus = devclass_find("pci");
505 pdrv->driver.name = pdrv->name;
506 pdrv->driver.methods = pci_methods;
507 pdrv->driver.size = sizeof(struct pci_dev);
509 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT,
518 pci_unregister_driver(struct pci_driver *pdrv)
522 list_del(&pdrv->links);
523 bus = devclass_find("pci");
525 devclass_delete_driver(bus, &pdrv->driver);
535 * Enable msix, positive errors indicate actual number of available
536 * vectors. Negative errors are failures.
539 pci_enable_msix(struct pci_dev *pdev, struct msix_entry *entries, int nreq)
541 struct resource_list_entry *rle;
546 avail = pci_msix_count(pdev->dev.bsddev);
553 if ((error = -pci_alloc_msix(pdev->dev.bsddev, &avail)) != 0)
555 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 1);
556 pdev->dev.msix = rle->start;
557 pdev->dev.msix_max = rle->start + avail;
558 for (i = 0; i < nreq; i++)
559 entries[i].vector = pdev->dev.msix + i;
563 static inline int pci_channel_offline(struct pci_dev *pdev)
568 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
572 static inline void pci_disable_sriov(struct pci_dev *dev)
577 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
578 * @_table: device table name
580 * This macro is used to create a struct pci_device_id array (a device table)
581 * in a generic manner.
583 #define DEFINE_PCI_DEVICE_TABLE(_table) \
584 const struct pci_device_id _table[] __devinitdata
587 /* XXX This should not be necessary. */
588 #define pcix_set_mmrbc(d, v) 0
589 #define pcix_get_max_mmrbc(d) 0
590 #define pcie_set_readrq(d, v) 0
592 #define PCI_DMA_BIDIRECTIONAL 0
593 #define PCI_DMA_TODEVICE 1
594 #define PCI_DMA_FROMDEVICE 2
595 #define PCI_DMA_NONE 3
597 #define pci_pool dma_pool
598 #define pci_pool_destroy dma_pool_destroy
599 #define pci_pool_alloc dma_pool_alloc
600 #define pci_pool_free dma_pool_free
601 #define pci_pool_create(_name, _pdev, _size, _align, _alloc) \
602 dma_pool_create(_name, &(_pdev)->dev, _size, _align, _alloc)
603 #define pci_free_consistent(_hwdev, _size, _vaddr, _dma_handle) \
604 dma_free_coherent((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
605 _size, _vaddr, _dma_handle)
606 #define pci_map_sg(_hwdev, _sg, _nents, _dir) \
607 dma_map_sg((_hwdev) == NULL ? NULL : &(_hwdev->dev), \
608 _sg, _nents, (enum dma_data_direction)_dir)
609 #define pci_map_single(_hwdev, _ptr, _size, _dir) \
610 dma_map_single((_hwdev) == NULL ? NULL : &(_hwdev->dev), \
611 (_ptr), (_size), (enum dma_data_direction)_dir)
612 #define pci_unmap_single(_hwdev, _addr, _size, _dir) \
613 dma_unmap_single((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
614 _addr, _size, (enum dma_data_direction)_dir)
615 #define pci_unmap_sg(_hwdev, _sg, _nents, _dir) \
616 dma_unmap_sg((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
617 _sg, _nents, (enum dma_data_direction)_dir)
618 #define pci_map_page(_hwdev, _page, _offset, _size, _dir) \
619 dma_map_page((_hwdev) == NULL ? NULL : &(_hwdev)->dev, _page,\
620 _offset, _size, (enum dma_data_direction)_dir)
621 #define pci_unmap_page(_hwdev, _dma_address, _size, _dir) \
622 dma_unmap_page((_hwdev) == NULL ? NULL : &(_hwdev)->dev, \
623 _dma_address, _size, (enum dma_data_direction)_dir)
624 #define pci_set_dma_mask(_pdev, mask) dma_set_mask(&(_pdev)->dev, (mask))
625 #define pci_dma_mapping_error(_pdev, _dma_addr) \
626 dma_mapping_error(&(_pdev)->dev, _dma_addr)
627 #define pci_set_consistent_dma_mask(_pdev, _mask) \
628 dma_set_coherent_mask(&(_pdev)->dev, (_mask))
629 #define DECLARE_PCI_UNMAP_ADDR(x) DEFINE_DMA_UNMAP_ADDR(x);
630 #define DECLARE_PCI_UNMAP_LEN(x) DEFINE_DMA_UNMAP_LEN(x);
631 #define pci_unmap_addr dma_unmap_addr
632 #define pci_unmap_addr_set dma_unmap_addr_set
633 #define pci_unmap_len dma_unmap_len
634 #define pci_unmap_len_set dma_unmap_len_set
636 typedef unsigned int __bitwise pci_channel_state_t;
637 typedef unsigned int __bitwise pci_ers_result_t;
639 enum pci_channel_state {
640 /* I/O channel is in normal state */
641 pci_channel_io_normal = (__force pci_channel_state_t) 1,
643 /* I/O to channel is blocked */
644 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
646 /* PCI card is dead */
647 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
650 enum pci_ers_result {
651 /* no result/none/not supported in device driver */
652 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
654 /* Device driver can recover without slot reset */
655 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
657 /* Device driver wants slot to be reset. */
658 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
660 /* Device has completely failed, is unrecoverable */
661 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
663 /* Device driver is fully recovered and operational */
664 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
668 /* PCI bus error event callbacks */
669 struct pci_error_handlers {
670 /* PCI bus error detected on this device */
671 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
672 enum pci_channel_state error);
674 /* MMIO has been re-enabled, but not DMA */
675 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
677 /* PCI Express link has been reset */
678 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
680 /* PCI slot has been reset */
681 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
683 /* Device driver may resume normal operations */
684 void (*resume)(struct pci_dev *dev);
689 #endif /* _LINUX_PCI_H_ */