Zephyr Project API  3.3.0
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>
15
16#ifdef __cplusplus
17extern "C" {
18#endif
19
30
40
41/* Helper macro to exclude invalid PCIe identifiers. We should really only
42 * need to look for PCIE_ID_NONE, but because of some broken PCI host controllers
43 * we have try cases where both VID & DID are zero or just one of them is
44 * zero (0x0000) and the other is all ones (0xFFFF).
45 */
46#define PCIE_ID_IS_VALID(id) ((id != PCIE_ID_NONE) && \
47 (id != PCIE_ID(0x0000, 0x0000)) && \
48 (id != PCIE_ID(0xFFFF, 0x0000)) && \
49 (id != PCIE_ID(0x0000, 0xFFFF)))
50
51struct pcie_dev {
54};
55
56#define Z_DEVICE_PCIE_NAME(node_id) _CONCAT(pcie_dev_, DT_DEP_ORD(node_id))
57
64#define PCIE_DT_ID(node_id) PCIE_ID(DT_PROP_OR(node_id, vendor_id, 0xffff), \
65 DT_PROP_OR(node_id, device_id, 0xffff))
66
76#define PCIE_DT_INST_ID(inst) PCIE_DT_ID(DT_DRV_INST(inst))
77
86#define DEVICE_PCIE_DECLARE(node_id) \
87 STRUCT_SECTION_ITERABLE(pcie_dev, Z_DEVICE_PCIE_NAME(node_id)) = { \
88 .bdf = PCIE_BDF_NONE, \
89 .id = PCIE_DT_ID(node_id), \
90 }
91
100#define DEVICE_PCIE_INST_DECLARE(inst) DEVICE_PCIE_DECLARE(DT_DRV_INST(inst))
101
126#define DEVICE_PCIE_INIT(node_id, name) .name = &Z_DEVICE_PCIE_NAME(node_id)
127
137#define DEVICE_PCIE_INST_INIT(inst, name) \
138 DEVICE_PCIE_INIT(DT_DRV_INST(inst), name)
139
140struct pcie_bar {
142 size_t size;
143};
144
145/*
146 * These functions are arch-, board-, or SoC-specific.
147 */
148
161__deprecated extern pcie_bdf_t pcie_bdf_lookup(pcie_id_t id);
162
172extern uint32_t pcie_conf_read(pcie_bdf_t bdf, unsigned int reg);
173
183extern void pcie_conf_write(pcie_bdf_t bdf, unsigned int reg, uint32_t data);
184
193typedef bool (*pcie_scan_cb_t)(pcie_bdf_t bdf, pcie_id_t id, void *cb_data);
194
195enum {
200};
201
206
209
211 void *cb_data;
212
215};
216
224int pcie_scan(const struct pcie_scan_opt *opt);
225
236__deprecated extern bool pcie_probe(pcie_bdf_t bdf, pcie_id_t id);
237
245extern bool pcie_get_mbar(pcie_bdf_t bdf,
246 unsigned int bar_index,
247 struct pcie_bar *mbar);
248
263 unsigned int index,
264 struct pcie_bar *mbar);
265
274 unsigned int bar_index,
275 struct pcie_bar *iobar);
276
291 unsigned int index,
292 struct pcie_bar *iobar);
293
301extern void pcie_set_cmd(pcie_bdf_t bdf, uint32_t bits, bool on);
302
303#ifndef CONFIG_PCIE_CONTROLLER
317extern unsigned int pcie_alloc_irq(pcie_bdf_t bdf);
318#endif /* CONFIG_PCIE_CONTROLLER */
319
326extern unsigned int pcie_get_irq(pcie_bdf_t bdf);
327
340extern void pcie_irq_enable(pcie_bdf_t bdf, unsigned int irq);
341
350
359
372 unsigned int irq,
373 unsigned int priority,
374 void (*routine)(const void *parameter),
375 const void *parameter,
377
388#define PCIE_HOST_CONTROLLER(n) PCIE_BDF(0, 0, n)
389
390/*
391 * Configuration word 13 contains the head of the capabilities list.
392 */
393
394#define PCIE_CONF_CAPPTR 13U /* capabilities pointer */
395#define PCIE_CONF_CAPPTR_FIRST(w) (((w) >> 2) & 0x3FU)
396
397/*
398 * The first word of every capability contains a capability identifier,
399 * and a link to the next capability (or 0) in configuration space.
400 */
401
402#define PCIE_CONF_CAP_ID(w) ((w) & 0xFFU)
403#define PCIE_CONF_CAP_NEXT(w) (((w) >> 10) & 0x3FU)
404
405/*
406 * The extended PCI Express capabilities lie at the end of the PCI configuration space
407 */
408
409#define PCIE_CONF_EXT_CAPPTR 64U
410
411/*
412 * The first word of every capability contains an extended capability identifier,
413 * and a link to the next capability (or 0) in the extended configuration space.
414 */
415
416#define PCIE_CONF_EXT_CAP_ID(w) ((w) & 0xFFFFU)
417#define PCIE_CONF_EXT_CAP_VER(w) (((w) >> 16) & 0xFU)
418#define PCIE_CONF_EXT_CAP_NEXT(w) (((w) >> 20) & 0xFFFU)
419
420/*
421 * Configuration word 0 aligns directly with pcie_id_t.
422 */
423
424#define PCIE_CONF_ID 0U
425
426/*
427 * Configuration word 1 contains command and status bits.
428 */
429
430#define PCIE_CONF_CMDSTAT 1U /* command/status register */
431
432#define PCIE_CONF_CMDSTAT_IO 0x00000001U /* I/O access enable */
433#define PCIE_CONF_CMDSTAT_MEM 0x00000002U /* mem access enable */
434#define PCIE_CONF_CMDSTAT_MASTER 0x00000004U /* bus master enable */
435#define PCIE_CONF_CMDSTAT_INTERRUPT 0x00080000U /* interrupt status */
436#define PCIE_CONF_CMDSTAT_CAPS 0x00100000U /* capabilities list */
437
438/*
439 * Configuration word 2 has additional function identification that
440 * we only care about for debug output (PCIe shell commands).
441 */
442
443#define PCIE_CONF_CLASSREV 2U /* class/revision register */
444
445#define PCIE_CONF_CLASSREV_CLASS(w) (((w) >> 24) & 0xFFU)
446#define PCIE_CONF_CLASSREV_SUBCLASS(w) (((w) >> 16) & 0xFFU)
447#define PCIE_CONF_CLASSREV_PROGIF(w) (((w) >> 8) & 0xFFU)
448#define PCIE_CONF_CLASSREV_REV(w) ((w) & 0xFFU)
449
450/*
451 * The only part of configuration word 3 that is of interest to us is
452 * the header type, as we use it to distinguish functional endpoints
453 * from bridges (which are, for our purposes, transparent).
454 */
455
456#define PCIE_CONF_TYPE 3U
457
458#define PCIE_CONF_MULTIFUNCTION(w) (((w) & 0x00800000U) != 0U)
459#define PCIE_CONF_TYPE_BRIDGE(w) (((w) & 0x007F0000U) != 0U)
460#define PCIE_CONF_TYPE_GET(w) (((w) >> 16) & 0x7F)
461
462#define PCIE_CONF_TYPE_STANDARD 0x0U
463#define PCIE_CONF_TYPE_PCI_BRIDGE 0x1U
464#define PCIE_CONF_TYPE_CARDBUS_BRIDGE 0x2U
465
466/*
467 * Words 4-9 are BARs are I/O or memory decoders. Memory decoders may
468 * be 64-bit decoders, in which case the next configuration word holds
469 * the high-order bits (and is, thus, not a BAR itself).
470 */
471
472#define PCIE_CONF_BAR0 4U
473#define PCIE_CONF_BAR1 5U
474#define PCIE_CONF_BAR2 6U
475#define PCIE_CONF_BAR3 7U
476#define PCIE_CONF_BAR4 8U
477#define PCIE_CONF_BAR5 9U
478
479#define PCIE_CONF_BAR_IO(w) (((w) & 0x00000001U) == 0x00000001U)
480#define PCIE_CONF_BAR_MEM(w) (((w) & 0x00000001U) != 0x00000001U)
481#define PCIE_CONF_BAR_64(w) (((w) & 0x00000006U) == 0x00000004U)
482#define PCIE_CONF_BAR_ADDR(w) ((w) & ~0xfUL)
483#define PCIE_CONF_BAR_IO_ADDR(w) ((w) & ~0x3UL)
484#define PCIE_CONF_BAR_FLAGS(w) ((w) & 0xfUL)
485#define PCIE_CONF_BAR_NONE 0U
486
487#define PCIE_CONF_BAR_INVAL 0xFFFFFFF0U
488#define PCIE_CONF_BAR_INVAL64 0xFFFFFFFFFFFFFFF0UL
489
490#define PCIE_CONF_BAR_INVAL_FLAGS(w) \
491 ((((w) & 0x00000006U) == 0x00000006U) || \
492 (((w) & 0x00000006U) == 0x00000002U))
493
494/*
495 * Type 1 Header has files related to bus management
496 */
497#define PCIE_BUS_NUMBER 6U
498
499#define PCIE_BUS_PRIMARY_NUMBER(w) ((w) & 0xffUL)
500#define PCIE_BUS_SECONDARY_NUMBER(w) (((w) >> 8) & 0xffUL)
501#define PCIE_BUS_SUBORDINATE_NUMBER(w) (((w) >> 16) & 0xffUL)
502#define PCIE_SECONDARY_LATENCY_TIMER(w) (((w) >> 24) & 0xffUL)
503
504#define PCIE_BUS_NUMBER_VAL(prim, sec, sub, lat) \
505 (((prim) & 0xffUL) | \
506 (((sec) & 0xffUL) << 8) | \
507 (((sub) & 0xffUL) << 16) | \
508 (((lat) & 0xffUL) << 24))
509
510/*
511 * Type 1 words 7 to 12 setups Bridge Memory base and limits
512 */
513#define PCIE_IO_SEC_STATUS 7U
514
515#define PCIE_IO_BASE(w) ((w) & 0xffUL)
516#define PCIE_IO_LIMIT(w) (((w) >> 8) & 0xffUL)
517#define PCIE_SEC_STATUS(w) (((w) >> 16) & 0xffffUL)
518
519#define PCIE_IO_SEC_STATUS_VAL(iob, iol, sec_status) \
520 (((iob) & 0xffUL) | \
521 (((iol) & 0xffUL) << 8) | \
522 (((sec_status) & 0xffffUL) << 16))
523
524#define PCIE_MEM_BASE_LIMIT 8U
525
526#define PCIE_MEM_BASE(w) ((w) & 0xffffUL)
527#define PCIE_MEM_LIMIT(w) (((w) >> 16) & 0xffffUL)
528
529#define PCIE_MEM_BASE_LIMIT_VAL(memb, meml) \
530 (((memb) & 0xffffUL) | \
531 (((meml) & 0xffffUL) << 16))
532
533#define PCIE_PREFETCH_BASE_LIMIT 9U
534
535#define PCIE_PREFETCH_BASE(w) ((w) & 0xffffUL)
536#define PCIE_PREFETCH_LIMIT(w) (((w) >> 16) & 0xffffUL)
537
538#define PCIE_PREFETCH_BASE_LIMIT_VAL(pmemb, pmeml) \
539 (((pmemb) & 0xffffUL) | \
540 (((pmeml) & 0xffffUL) << 16))
541
542#define PCIE_PREFETCH_BASE_UPPER 10U
543
544#define PCIE_PREFETCH_LIMIT_UPPER 11U
545
546#define PCIE_IO_BASE_LIMIT_UPPER 12U
547
548#define PCIE_IO_BASE_UPPER(w) ((w) & 0xffffUL)
549#define PCIE_IO_LIMIT_UPPER(w) (((w) >> 16) & 0xffffUL)
550
551#define PCIE_IO_BASE_LIMIT_UPPER_VAL(iobu, iolu) \
552 (((iobu) & 0xffffUL) | \
553 (((iolu) & 0xffffUL) << 16))
554
555/*
556 * Word 15 contains information related to interrupts.
557 *
558 * We're only interested in the low byte, which is [supposed to be] set by
559 * the firmware to indicate which wire IRQ the device interrupt is routed to.
560 */
561
562#define PCIE_CONF_INTR 15U
563
564#define PCIE_CONF_INTR_IRQ(w) ((w) & 0xFFU)
565#define PCIE_CONF_INTR_IRQ_NONE 0xFFU /* no interrupt routed */
566
567#define PCIE_MAX_BUS (0xFFFFFFFFU & PCIE_BDF_BUS_MASK)
568#define PCIE_MAX_DEV (0xFFFFFFFFU & PCIE_BDF_DEV_MASK)
569#define PCIE_MAX_FUNC (0xFFFFFFFFU & PCIE_BDF_FUNC_MASK)
570
585#define PCIE_IRQ_CONNECT(bdf_p, irq_p, priority_p, \
586 isr_p, isr_param_p, flags_p) \
587 ARCH_PCIE_IRQ_CONNECT(bdf_p, irq_p, priority_p, \
588 isr_p, isr_param_p, flags_p)
589
590#ifdef __cplusplus
591}
592#endif
593
594#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.
@ PCIE_SCAN_RECURSIVE
Definition: pcie.h:197
@ PCIE_SCAN_CB_ALL
Definition: pcie.h:199
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:39
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:29
bool(* pcie_scan_cb_t)(pcie_bdf_t bdf, pcie_id_t id, void *cb_data)
Definition: pcie.h:193
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.
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:140
uintptr_t phys_addr
Definition: pcie.h:141
size_t size
Definition: pcie.h:142
Definition: pcie.h:51
pcie_id_t id
Definition: pcie.h:53
pcie_bdf_t bdf
Definition: pcie.h:52
Definition: pcie.h:203
uint8_t bus
Definition: pcie.h:205
void * cb_data
Definition: pcie.h:211
pcie_scan_cb_t cb
Definition: pcie.h:208
uint32_t flags
Definition: pcie.h:214
static fdata_t data[2]
Definition: test_fifo_contexts.c:15