Zephyr Project API  3.4.0
A Scalable Open Source RTOS
pcie.h
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1/*
2 * Copyright (c) 2019 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7#ifndef ZEPHYR_INCLUDE_DRIVERS_PCIE_PCIE_H_
8#define ZEPHYR_INCLUDE_DRIVERS_PCIE_PCIE_H_
9
10#include <stddef.h>
11#include <zephyr/devicetree.h>
13#include <zephyr/types.h>
14#include <zephyr/kernel.h>
16
17#ifdef __cplusplus
18extern "C" {
19#endif
20
31
41
42/* Helper macro to exclude invalid PCIe identifiers. We should really only
43 * need to look for PCIE_ID_NONE, but because of some broken PCI host controllers
44 * we have try cases where both VID & DID are zero or just one of them is
45 * zero (0x0000) and the other is all ones (0xFFFF).
46 */
47#define PCIE_ID_IS_VALID(id) ((id != PCIE_ID_NONE) && \
48 (id != PCIE_ID(0x0000, 0x0000)) && \
49 (id != PCIE_ID(0xFFFF, 0x0000)) && \
50 (id != PCIE_ID(0x0000, 0xFFFF)))
51
52struct pcie_dev {
57};
58
59#define Z_DEVICE_PCIE_NAME(node_id) _CONCAT(pcie_dev_, DT_DEP_ORD(node_id))
60
67#define PCIE_DT_ID(node_id) PCIE_ID(DT_PROP_OR(node_id, vendor_id, 0xffff), \
68 DT_PROP_OR(node_id, device_id, 0xffff))
69
79#define PCIE_DT_INST_ID(inst) PCIE_DT_ID(DT_DRV_INST(inst))
80
89#define DEVICE_PCIE_DECLARE(node_id) \
90 STRUCT_SECTION_ITERABLE(pcie_dev, Z_DEVICE_PCIE_NAME(node_id)) = { \
91 .bdf = PCIE_BDF_NONE, \
92 .id = PCIE_DT_ID(node_id), \
93 .class_rev = DT_PROP_OR(node_id, class_rev, 0), \
94 .class_rev_mask = DT_PROP_OR(node_id, class_rev_mask, 0), \
95 }
96
105#define DEVICE_PCIE_INST_DECLARE(inst) DEVICE_PCIE_DECLARE(DT_DRV_INST(inst))
106
131#define DEVICE_PCIE_INIT(node_id, name) .name = &Z_DEVICE_PCIE_NAME(node_id)
132
142#define DEVICE_PCIE_INST_INIT(inst, name) \
143 DEVICE_PCIE_INIT(DT_DRV_INST(inst), name)
144
145struct pcie_bar {
147 size_t size;
148};
149
150/*
151 * These functions are arch-, board-, or SoC-specific.
152 */
153
166__deprecated extern pcie_bdf_t pcie_bdf_lookup(pcie_id_t id);
167
177extern uint32_t pcie_conf_read(pcie_bdf_t bdf, unsigned int reg);
178
188extern void pcie_conf_write(pcie_bdf_t bdf, unsigned int reg, uint32_t data);
189
198typedef bool (*pcie_scan_cb_t)(pcie_bdf_t bdf, pcie_id_t id, void *cb_data);
199
200enum {
205};
206
211
214
216 void *cb_data;
217
220};
221
229int pcie_scan(const struct pcie_scan_opt *opt);
230
241__deprecated extern bool pcie_probe(pcie_bdf_t bdf, pcie_id_t id);
242
250extern bool pcie_get_mbar(pcie_bdf_t bdf,
251 unsigned int bar_index,
252 struct pcie_bar *mbar);
253
268 unsigned int index,
269 struct pcie_bar *mbar);
270
279 unsigned int bar_index,
280 struct pcie_bar *iobar);
281
296 unsigned int index,
297 struct pcie_bar *iobar);
298
306extern void pcie_set_cmd(pcie_bdf_t bdf, uint32_t bits, bool on);
307
308#ifndef CONFIG_PCIE_CONTROLLER
322extern unsigned int pcie_alloc_irq(pcie_bdf_t bdf);
323#endif /* CONFIG_PCIE_CONTROLLER */
324
331extern unsigned int pcie_get_irq(pcie_bdf_t bdf);
332
345extern void pcie_irq_enable(pcie_bdf_t bdf, unsigned int irq);
346
355
364
377 unsigned int irq,
378 unsigned int priority,
379 void (*routine)(const void *parameter),
380 const void *parameter,
382
393#define PCIE_HOST_CONTROLLER(n) PCIE_BDF(0, 0, n)
394
395/*
396 * Configuration word 13 contains the head of the capabilities list.
397 */
398
399#define PCIE_CONF_CAPPTR 13U /* capabilities pointer */
400#define PCIE_CONF_CAPPTR_FIRST(w) (((w) >> 2) & 0x3FU)
401
402/*
403 * The first word of every capability contains a capability identifier,
404 * and a link to the next capability (or 0) in configuration space.
405 */
406
407#define PCIE_CONF_CAP_ID(w) ((w) & 0xFFU)
408#define PCIE_CONF_CAP_NEXT(w) (((w) >> 10) & 0x3FU)
409
410/*
411 * The extended PCI Express capabilities lie at the end of the PCI configuration space
412 */
413
414#define PCIE_CONF_EXT_CAPPTR 64U
415
416/*
417 * The first word of every capability contains an extended capability identifier,
418 * and a link to the next capability (or 0) in the extended configuration space.
419 */
420
421#define PCIE_CONF_EXT_CAP_ID(w) ((w) & 0xFFFFU)
422#define PCIE_CONF_EXT_CAP_VER(w) (((w) >> 16) & 0xFU)
423#define PCIE_CONF_EXT_CAP_NEXT(w) (((w) >> 20) & 0xFFFU)
424
425/*
426 * Configuration word 0 aligns directly with pcie_id_t.
427 */
428
429#define PCIE_CONF_ID 0U
430
431/*
432 * Configuration word 1 contains command and status bits.
433 */
434
435#define PCIE_CONF_CMDSTAT 1U /* command/status register */
436
437#define PCIE_CONF_CMDSTAT_IO 0x00000001U /* I/O access enable */
438#define PCIE_CONF_CMDSTAT_MEM 0x00000002U /* mem access enable */
439#define PCIE_CONF_CMDSTAT_MASTER 0x00000004U /* bus master enable */
440#define PCIE_CONF_CMDSTAT_INTERRUPT 0x00080000U /* interrupt status */
441#define PCIE_CONF_CMDSTAT_CAPS 0x00100000U /* capabilities list */
442
443/*
444 * Configuration word 2 has additional function identification that
445 * we only care about for debug output (PCIe shell commands).
446 */
447
448#define PCIE_CONF_CLASSREV 2U /* class/revision register */
449
450#define PCIE_CONF_CLASSREV_CLASS(w) (((w) >> 24) & 0xFFU)
451#define PCIE_CONF_CLASSREV_SUBCLASS(w) (((w) >> 16) & 0xFFU)
452#define PCIE_CONF_CLASSREV_PROGIF(w) (((w) >> 8) & 0xFFU)
453#define PCIE_CONF_CLASSREV_REV(w) ((w) & 0xFFU)
454
455/*
456 * The only part of configuration word 3 that is of interest to us is
457 * the header type, as we use it to distinguish functional endpoints
458 * from bridges (which are, for our purposes, transparent).
459 */
460
461#define PCIE_CONF_TYPE 3U
462
463#define PCIE_CONF_MULTIFUNCTION(w) (((w) & 0x00800000U) != 0U)
464#define PCIE_CONF_TYPE_BRIDGE(w) (((w) & 0x007F0000U) != 0U)
465#define PCIE_CONF_TYPE_GET(w) (((w) >> 16) & 0x7F)
466
467#define PCIE_CONF_TYPE_STANDARD 0x0U
468#define PCIE_CONF_TYPE_PCI_BRIDGE 0x1U
469#define PCIE_CONF_TYPE_CARDBUS_BRIDGE 0x2U
470
471/*
472 * Words 4-9 are BARs are I/O or memory decoders. Memory decoders may
473 * be 64-bit decoders, in which case the next configuration word holds
474 * the high-order bits (and is, thus, not a BAR itself).
475 */
476
477#define PCIE_CONF_BAR0 4U
478#define PCIE_CONF_BAR1 5U
479#define PCIE_CONF_BAR2 6U
480#define PCIE_CONF_BAR3 7U
481#define PCIE_CONF_BAR4 8U
482#define PCIE_CONF_BAR5 9U
483
484#define PCIE_CONF_BAR_IO(w) (((w) & 0x00000001U) == 0x00000001U)
485#define PCIE_CONF_BAR_MEM(w) (((w) & 0x00000001U) != 0x00000001U)
486#define PCIE_CONF_BAR_64(w) (((w) & 0x00000006U) == 0x00000004U)
487#define PCIE_CONF_BAR_ADDR(w) ((w) & ~0xfUL)
488#define PCIE_CONF_BAR_IO_ADDR(w) ((w) & ~0x3UL)
489#define PCIE_CONF_BAR_FLAGS(w) ((w) & 0xfUL)
490#define PCIE_CONF_BAR_NONE 0U
491
492#define PCIE_CONF_BAR_INVAL 0xFFFFFFF0U
493#define PCIE_CONF_BAR_INVAL64 0xFFFFFFFFFFFFFFF0UL
494
495#define PCIE_CONF_BAR_INVAL_FLAGS(w) \
496 ((((w) & 0x00000006U) == 0x00000006U) || \
497 (((w) & 0x00000006U) == 0x00000002U))
498
499/*
500 * Type 1 Header has files related to bus management
501 */
502#define PCIE_BUS_NUMBER 6U
503
504#define PCIE_BUS_PRIMARY_NUMBER(w) ((w) & 0xffUL)
505#define PCIE_BUS_SECONDARY_NUMBER(w) (((w) >> 8) & 0xffUL)
506#define PCIE_BUS_SUBORDINATE_NUMBER(w) (((w) >> 16) & 0xffUL)
507#define PCIE_SECONDARY_LATENCY_TIMER(w) (((w) >> 24) & 0xffUL)
508
509#define PCIE_BUS_NUMBER_VAL(prim, sec, sub, lat) \
510 (((prim) & 0xffUL) | \
511 (((sec) & 0xffUL) << 8) | \
512 (((sub) & 0xffUL) << 16) | \
513 (((lat) & 0xffUL) << 24))
514
515/*
516 * Type 1 words 7 to 12 setups Bridge Memory base and limits
517 */
518#define PCIE_IO_SEC_STATUS 7U
519
520#define PCIE_IO_BASE(w) ((w) & 0xffUL)
521#define PCIE_IO_LIMIT(w) (((w) >> 8) & 0xffUL)
522#define PCIE_SEC_STATUS(w) (((w) >> 16) & 0xffffUL)
523
524#define PCIE_IO_SEC_STATUS_VAL(iob, iol, sec_status) \
525 (((iob) & 0xffUL) | \
526 (((iol) & 0xffUL) << 8) | \
527 (((sec_status) & 0xffffUL) << 16))
528
529#define PCIE_MEM_BASE_LIMIT 8U
530
531#define PCIE_MEM_BASE(w) ((w) & 0xffffUL)
532#define PCIE_MEM_LIMIT(w) (((w) >> 16) & 0xffffUL)
533
534#define PCIE_MEM_BASE_LIMIT_VAL(memb, meml) \
535 (((memb) & 0xffffUL) | \
536 (((meml) & 0xffffUL) << 16))
537
538#define PCIE_PREFETCH_BASE_LIMIT 9U
539
540#define PCIE_PREFETCH_BASE(w) ((w) & 0xffffUL)
541#define PCIE_PREFETCH_LIMIT(w) (((w) >> 16) & 0xffffUL)
542
543#define PCIE_PREFETCH_BASE_LIMIT_VAL(pmemb, pmeml) \
544 (((pmemb) & 0xffffUL) | \
545 (((pmeml) & 0xffffUL) << 16))
546
547#define PCIE_PREFETCH_BASE_UPPER 10U
548
549#define PCIE_PREFETCH_LIMIT_UPPER 11U
550
551#define PCIE_IO_BASE_LIMIT_UPPER 12U
552
553#define PCIE_IO_BASE_UPPER(w) ((w) & 0xffffUL)
554#define PCIE_IO_LIMIT_UPPER(w) (((w) >> 16) & 0xffffUL)
555
556#define PCIE_IO_BASE_LIMIT_UPPER_VAL(iobu, iolu) \
557 (((iobu) & 0xffffUL) | \
558 (((iolu) & 0xffffUL) << 16))
559
560/*
561 * Word 15 contains information related to interrupts.
562 *
563 * We're only interested in the low byte, which is [supposed to be] set by
564 * the firmware to indicate which wire IRQ the device interrupt is routed to.
565 */
566
567#define PCIE_CONF_INTR 15U
568
569#define PCIE_CONF_INTR_IRQ(w) ((w) & 0xFFU)
570#define PCIE_CONF_INTR_IRQ_NONE 0xFFU /* no interrupt routed */
571
572#define PCIE_MAX_BUS (0xFFFFFFFFU & PCIE_BDF_BUS_MASK)
573#define PCIE_MAX_DEV (0xFFFFFFFFU & PCIE_BDF_DEV_MASK)
574#define PCIE_MAX_FUNC (0xFFFFFFFFU & PCIE_BDF_FUNC_MASK)
575
590#define PCIE_IRQ_CONNECT(bdf_p, irq_p, priority_p, \
591 isr_p, isr_param_p, flags_p) \
592 ARCH_PCIE_IRQ_CONNECT(bdf_p, irq_p, priority_p, \
593 isr_p, isr_param_p, flags_p)
594
595#ifdef __cplusplus
596}
597#endif
598
599#endif /* ZEPHYR_INCLUDE_DRIVERS_PCIE_PCIE_H_ */
ZTEST_BMEM int index[(3)]
Definition: main.c:32
Devicetree main header.
uint32_t pcie_conf_read(pcie_bdf_t bdf, unsigned int reg)
Read a 32-bit word from an endpoint's configuration space.
bool pcie_connect_dynamic_irq(pcie_bdf_t bdf, unsigned int irq, unsigned int priority, void(*routine)(const void *parameter), const void *parameter, uint32_t flags)
Dynamically connect a PCIe endpoint IRQ to an ISR handler.
void pcie_set_cmd(pcie_bdf_t bdf, uint32_t bits, bool on)
Set or reset bits in the endpoint command/status register.
bool pcie_get_iobar(pcie_bdf_t bdf, unsigned int bar_index, struct pcie_bar *iobar)
Get the I/O BAR at a specific BAR index.
bool pcie_probe(pcie_bdf_t bdf, pcie_id_t id)
Probe for the presence of a PCI(e) endpoint.
uint32_t pcie_id_t
A unique PCI(e) identifier (vendor ID, device ID).
Definition: pcie.h:40
void pcie_conf_write(pcie_bdf_t bdf, unsigned int reg, uint32_t data)
Write a 32-bit word to an endpoint's configuration space.
uint32_t pcie_get_cap(pcie_bdf_t bdf, uint32_t cap_id)
Find a PCI(e) capability in an endpoint's configuration space.
uint32_t pcie_get_ext_cap(pcie_bdf_t bdf, uint32_t cap_id)
Find an Extended PCI(e) capability in an endpoint's configuration space.
uint32_t pcie_bdf_t
A unique PCI(e) endpoint (bus, device, function).
Definition: pcie.h:30
bool(* pcie_scan_cb_t)(pcie_bdf_t bdf, pcie_id_t id, void *cb_data)
Definition: pcie.h:198
int pcie_scan(const struct pcie_scan_opt *opt)
bool pcie_probe_iobar(pcie_bdf_t bdf, unsigned int index, struct pcie_bar *iobar)
Probe the nth I/O BAR address assigned to an endpoint.
pcie_bdf_t pcie_bdf_lookup(pcie_id_t id)
Look up the BDF based on PCI(e) vendor & device ID.
@ PCIE_SCAN_RECURSIVE
Definition: pcie.h:202
@ PCIE_SCAN_CB_ALL
Definition: pcie.h:204
unsigned int pcie_alloc_irq(pcie_bdf_t bdf)
Allocate an IRQ for an endpoint.
bool pcie_probe_mbar(pcie_bdf_t bdf, unsigned int index, struct pcie_bar *mbar)
Probe the nth MMIO address assigned to an endpoint.
bool pcie_get_mbar(pcie_bdf_t bdf, unsigned int bar_index, struct pcie_bar *mbar)
Get the MBAR at a specific BAR index.
unsigned int pcie_get_irq(pcie_bdf_t bdf)
Return the IRQ assigned by the firmware/board to an endpoint.
void pcie_irq_enable(pcie_bdf_t bdf, unsigned int irq)
Enable the PCI(e) endpoint to generate the specified IRQ.
#define BIT(n)
Unsigned integer with bit position n set (signed in assembly language).
Definition: util_macro.h:44
Public kernel APIs.
flags
Definition: parser.h:96
#define bool
Definition: stdbool.h:13
__UINT32_TYPE__ uint32_t
Definition: stdint.h:90
__UINT8_TYPE__ uint8_t
Definition: stdint.h:88
__UINTPTR_TYPE__ uintptr_t
Definition: stdint.h:105
Definition: pcie.h:145
uintptr_t phys_addr
Definition: pcie.h:146
size_t size
Definition: pcie.h:147
Definition: pcie.h:52
pcie_id_t id
Definition: pcie.h:54
uint32_t class_rev_mask
Definition: pcie.h:56
pcie_bdf_t bdf
Definition: pcie.h:53
uint32_t class_rev
Definition: pcie.h:55
Definition: pcie.h:208
uint8_t bus
Definition: pcie.h:210
void * cb_data
Definition: pcie.h:216
pcie_scan_cb_t cb
Definition: pcie.h:213
uint32_t flags
Definition: pcie.h:219
static fdata_t data[2]
Definition: test_fifo_contexts.c:15