2 * Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org>
3 * Copyright (C) 2013 Intel Corporation
4 * Copyright (C) 2015 EMC Corporation
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, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * The Non-Transparent Bridge (NTB) is a device that allows you to connect
31 * two or more systems using a PCI-e links, providing remote memory access.
33 * This module contains a driver for NTB hardware in Intel Xeon/Atom CPUs.
35 * NOTE: Much of the code in this module is shared with Linux. Any patches may
36 * be picked up and redistributed in Linux with a dual GPL/BSD license.
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/systm.h>
46 #include <sys/endian.h>
47 #include <sys/interrupt.h>
48 #include <sys/malloc.h>
49 #include <sys/module.h>
50 #include <sys/mutex.h>
51 #include <sys/pciio.h>
52 #include <sys/queue.h>
55 #include <sys/sysctl.h>
58 #include <machine/bus.h>
59 #include <machine/intr_machdep.h>
60 #include <machine/resource.h>
61 #include <dev/pci/pcireg.h>
62 #include <dev/pci/pcivar.h>
67 #define MAX_MSIX_INTERRUPTS MAX(XEON_DB_COUNT, ATOM_DB_COUNT)
69 #define NTB_HB_TIMEOUT 1 /* second */
70 #define ATOM_LINK_RECOVERY_TIME 500 /* ms */
71 #define BAR_HIGH_MASK (~((1ull << 12) - 1))
73 #define NTB_MSIX_VER_GUARD 0xaabbccdd
74 #define NTB_MSIX_RECEIVED 0xe0f0e0f0
77 * PCI constants could be somewhere more generic, but aren't defined/used in
80 #define PCI_MSIX_ENTRY_SIZE 16
81 #define PCI_MSIX_ENTRY_LOWER_ADDR 0
82 #define PCI_MSIX_ENTRY_UPPER_ADDR 4
83 #define PCI_MSIX_ENTRY_DATA 8
85 enum ntb_device_type {
90 /* ntb_conn_type are hardware numbers, cannot change. */
92 NTB_CONN_TRANSPARENT = 0,
97 enum ntb_b2b_direction {
122 /* Device features and workarounds */
123 #define HAS_FEATURE(ntb, feature) \
124 (((ntb)->features & (feature)) != 0)
129 enum ntb_device_type type;
133 struct ntb_pci_bar_info {
134 bus_space_tag_t pci_bus_tag;
135 bus_space_handle_t pci_bus_handle;
137 struct resource *pci_resource;
141 vm_memattr_t map_mode;
143 /* Configuration register offsets */
146 uint32_t pbarxlat_off;
149 struct ntb_int_info {
150 struct resource *res;
156 struct ntb_softc *ntb;
165 unsigned mw_bar[NTB_MAX_BARS];
174 struct ntb_xlat_reg {
189 struct ntb_b2b_addr {
191 uint64_t bar2_addr64;
192 uint64_t bar4_addr64;
193 uint64_t bar4_addr32;
194 uint64_t bar5_addr32;
197 struct ntb_msix_data {
203 /* ntb.c context. Do not move! Must go first! */
207 enum ntb_device_type type;
210 struct ntb_pci_bar_info bar_info[NTB_MAX_BARS];
211 struct ntb_int_info int_info[MAX_MSIX_INTERRUPTS];
212 uint32_t allocated_interrupts;
214 struct ntb_msix_data peer_msix_data[XEON_NONLINK_DB_MSIX_BITS];
215 struct ntb_msix_data msix_data[XEON_NONLINK_DB_MSIX_BITS];
218 struct ntb_pci_bar_info *peer_lapic_bar;
219 struct callout peer_msix_work;
221 struct callout heartbeat_timer;
222 struct callout lr_timer;
224 struct ntb_vec *msix_vec;
227 enum ntb_conn_type conn_type;
228 enum ntb_b2b_direction dev_type;
230 /* Offset of peer bar0 in B2B BAR */
232 /* Memory window used to access peer bar0 */
233 #define B2B_MW_DISABLED UINT8_MAX
241 uint8_t db_vec_count;
242 uint8_t db_vec_shift;
244 /* Protects local db_mask. */
245 #define DB_MASK_LOCK(sc) mtx_lock_spin(&(sc)->db_mask_lock)
246 #define DB_MASK_UNLOCK(sc) mtx_unlock_spin(&(sc)->db_mask_lock)
247 #define DB_MASK_ASSERT(sc,f) mtx_assert(&(sc)->db_mask_lock, (f))
248 struct mtx db_mask_lock;
250 volatile uint32_t ntb_ctl;
251 volatile uint32_t lnk_sta;
253 uint64_t db_valid_mask;
254 uint64_t db_link_mask;
256 uint64_t fake_db_bell; /* NTB_SB01BASE_LOCKUP*/
258 int last_ts; /* ticks @ last irq */
260 const struct ntb_reg *reg;
261 const struct ntb_alt_reg *self_reg;
262 const struct ntb_alt_reg *peer_reg;
263 const struct ntb_xlat_reg *xlat_reg;
267 static __inline uint64_t
268 bus_space_read_8(bus_space_tag_t tag, bus_space_handle_t handle,
272 return (bus_space_read_4(tag, handle, offset) |
273 ((uint64_t)bus_space_read_4(tag, handle, offset + 4)) << 32);
277 bus_space_write_8(bus_space_tag_t tag, bus_space_handle_t handle,
278 bus_size_t offset, uint64_t val)
281 bus_space_write_4(tag, handle, offset, val);
282 bus_space_write_4(tag, handle, offset + 4, val >> 32);
286 #define intel_ntb_bar_read(SIZE, bar, offset) \
287 bus_space_read_ ## SIZE (ntb->bar_info[(bar)].pci_bus_tag, \
288 ntb->bar_info[(bar)].pci_bus_handle, (offset))
289 #define intel_ntb_bar_write(SIZE, bar, offset, val) \
290 bus_space_write_ ## SIZE (ntb->bar_info[(bar)].pci_bus_tag, \
291 ntb->bar_info[(bar)].pci_bus_handle, (offset), (val))
292 #define intel_ntb_reg_read(SIZE, offset) \
293 intel_ntb_bar_read(SIZE, NTB_CONFIG_BAR, offset)
294 #define intel_ntb_reg_write(SIZE, offset, val) \
295 intel_ntb_bar_write(SIZE, NTB_CONFIG_BAR, offset, val)
296 #define intel_ntb_mw_read(SIZE, offset) \
297 intel_ntb_bar_read(SIZE, intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx), \
299 #define intel_ntb_mw_write(SIZE, offset, val) \
300 intel_ntb_bar_write(SIZE, intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx), \
303 static int intel_ntb_probe(device_t device);
304 static int intel_ntb_attach(device_t device);
305 static int intel_ntb_detach(device_t device);
306 static uint64_t intel_ntb_db_valid_mask(device_t dev);
307 static void intel_ntb_spad_clear(device_t dev);
308 static uint64_t intel_ntb_db_vector_mask(device_t dev, uint32_t vector);
309 static bool intel_ntb_link_is_up(device_t dev, enum ntb_speed *speed,
310 enum ntb_width *width);
311 static int intel_ntb_link_enable(device_t dev, enum ntb_speed speed,
312 enum ntb_width width);
313 static int intel_ntb_link_disable(device_t dev);
314 static int intel_ntb_spad_read(device_t dev, unsigned int idx, uint32_t *val);
315 static int intel_ntb_peer_spad_write(device_t dev, unsigned int idx, uint32_t val);
317 static unsigned intel_ntb_user_mw_to_idx(struct ntb_softc *, unsigned uidx);
318 static inline enum ntb_bar intel_ntb_mw_to_bar(struct ntb_softc *, unsigned mw);
319 static inline bool bar_is_64bit(struct ntb_softc *, enum ntb_bar);
320 static inline void bar_get_xlat_params(struct ntb_softc *, enum ntb_bar,
321 uint32_t *base, uint32_t *xlat, uint32_t *lmt);
322 static int intel_ntb_map_pci_bars(struct ntb_softc *ntb);
323 static int intel_ntb_mw_set_wc_internal(struct ntb_softc *, unsigned idx,
325 static void print_map_success(struct ntb_softc *, struct ntb_pci_bar_info *,
327 static int map_mmr_bar(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar);
328 static int map_memory_window_bar(struct ntb_softc *ntb,
329 struct ntb_pci_bar_info *bar);
330 static void intel_ntb_unmap_pci_bar(struct ntb_softc *ntb);
331 static int intel_ntb_remap_msix(device_t, uint32_t desired, uint32_t avail);
332 static int intel_ntb_init_isr(struct ntb_softc *ntb);
333 static int intel_ntb_setup_legacy_interrupt(struct ntb_softc *ntb);
334 static int intel_ntb_setup_msix(struct ntb_softc *ntb, uint32_t num_vectors);
335 static void intel_ntb_teardown_interrupts(struct ntb_softc *ntb);
336 static inline uint64_t intel_ntb_vec_mask(struct ntb_softc *, uint64_t db_vector);
337 static void intel_ntb_interrupt(struct ntb_softc *, uint32_t vec);
338 static void ndev_vec_isr(void *arg);
339 static void ndev_irq_isr(void *arg);
340 static inline uint64_t db_ioread(struct ntb_softc *, uint64_t regoff);
341 static inline void db_iowrite(struct ntb_softc *, uint64_t regoff, uint64_t);
342 static inline void db_iowrite_raw(struct ntb_softc *, uint64_t regoff, uint64_t);
343 static int intel_ntb_create_msix_vec(struct ntb_softc *ntb, uint32_t num_vectors);
344 static void intel_ntb_free_msix_vec(struct ntb_softc *ntb);
345 static void intel_ntb_get_msix_info(struct ntb_softc *ntb);
346 static void intel_ntb_exchange_msix(void *);
347 static struct ntb_hw_info *intel_ntb_get_device_info(uint32_t device_id);
348 static void intel_ntb_detect_max_mw(struct ntb_softc *ntb);
349 static int intel_ntb_detect_xeon(struct ntb_softc *ntb);
350 static int intel_ntb_detect_atom(struct ntb_softc *ntb);
351 static int intel_ntb_xeon_init_dev(struct ntb_softc *ntb);
352 static int intel_ntb_atom_init_dev(struct ntb_softc *ntb);
353 static void intel_ntb_teardown_xeon(struct ntb_softc *ntb);
354 static void configure_atom_secondary_side_bars(struct ntb_softc *ntb);
355 static void xeon_reset_sbar_size(struct ntb_softc *, enum ntb_bar idx,
356 enum ntb_bar regbar);
357 static void xeon_set_sbar_base_and_limit(struct ntb_softc *,
358 uint64_t base_addr, enum ntb_bar idx, enum ntb_bar regbar);
359 static void xeon_set_pbar_xlat(struct ntb_softc *, uint64_t base_addr,
361 static int xeon_setup_b2b_mw(struct ntb_softc *,
362 const struct ntb_b2b_addr *addr, const struct ntb_b2b_addr *peer_addr);
363 static inline bool link_is_up(struct ntb_softc *ntb);
364 static inline bool _xeon_link_is_up(struct ntb_softc *ntb);
365 static inline bool atom_link_is_err(struct ntb_softc *ntb);
366 static inline enum ntb_speed intel_ntb_link_sta_speed(struct ntb_softc *);
367 static inline enum ntb_width intel_ntb_link_sta_width(struct ntb_softc *);
368 static void atom_link_hb(void *arg);
369 static void recover_atom_link(void *arg);
370 static bool intel_ntb_poll_link(struct ntb_softc *ntb);
371 static void save_bar_parameters(struct ntb_pci_bar_info *bar);
372 static void intel_ntb_sysctl_init(struct ntb_softc *);
373 static int sysctl_handle_features(SYSCTL_HANDLER_ARGS);
374 static int sysctl_handle_link_admin(SYSCTL_HANDLER_ARGS);
375 static int sysctl_handle_link_status_human(SYSCTL_HANDLER_ARGS);
376 static int sysctl_handle_link_status(SYSCTL_HANDLER_ARGS);
377 static int sysctl_handle_register(SYSCTL_HANDLER_ARGS);
379 static unsigned g_ntb_hw_debug_level;
380 SYSCTL_UINT(_hw_ntb, OID_AUTO, debug_level, CTLFLAG_RWTUN,
381 &g_ntb_hw_debug_level, 0, "ntb_hw log level -- higher is more verbose");
382 #define intel_ntb_printf(lvl, ...) do { \
383 if ((lvl) <= g_ntb_hw_debug_level) { \
384 device_printf(ntb->device, __VA_ARGS__); \
388 #define _NTB_PAT_UC 0
389 #define _NTB_PAT_WC 1
390 #define _NTB_PAT_WT 4
391 #define _NTB_PAT_WP 5
392 #define _NTB_PAT_WB 6
393 #define _NTB_PAT_UCM 7
394 static unsigned g_ntb_mw_pat = _NTB_PAT_UC;
395 SYSCTL_UINT(_hw_ntb, OID_AUTO, default_mw_pat, CTLFLAG_RDTUN,
396 &g_ntb_mw_pat, 0, "Configure the default memory window cache flags (PAT): "
397 "UC: " __XSTRING(_NTB_PAT_UC) ", "
398 "WC: " __XSTRING(_NTB_PAT_WC) ", "
399 "WT: " __XSTRING(_NTB_PAT_WT) ", "
400 "WP: " __XSTRING(_NTB_PAT_WP) ", "
401 "WB: " __XSTRING(_NTB_PAT_WB) ", "
402 "UC-: " __XSTRING(_NTB_PAT_UCM));
404 static inline vm_memattr_t
405 intel_ntb_pat_flags(void)
408 switch (g_ntb_mw_pat) {
410 return (VM_MEMATTR_WRITE_COMBINING);
412 return (VM_MEMATTR_WRITE_THROUGH);
414 return (VM_MEMATTR_WRITE_PROTECTED);
416 return (VM_MEMATTR_WRITE_BACK);
418 return (VM_MEMATTR_WEAK_UNCACHEABLE);
422 return (VM_MEMATTR_UNCACHEABLE);
427 * Well, this obviously doesn't belong here, but it doesn't seem to exist
428 * anywhere better yet.
430 static inline const char *
431 intel_ntb_vm_memattr_to_str(vm_memattr_t pat)
435 case VM_MEMATTR_WRITE_COMBINING:
436 return ("WRITE_COMBINING");
437 case VM_MEMATTR_WRITE_THROUGH:
438 return ("WRITE_THROUGH");
439 case VM_MEMATTR_WRITE_PROTECTED:
440 return ("WRITE_PROTECTED");
441 case VM_MEMATTR_WRITE_BACK:
442 return ("WRITE_BACK");
443 case VM_MEMATTR_WEAK_UNCACHEABLE:
445 case VM_MEMATTR_UNCACHEABLE:
446 return ("UNCACHEABLE");
452 static int g_ntb_msix_idx = 1;
453 SYSCTL_INT(_hw_ntb, OID_AUTO, msix_mw_idx, CTLFLAG_RDTUN, &g_ntb_msix_idx,
454 0, "Use this memory window to access the peer MSIX message complex on "
455 "certain Xeon-based NTB systems, as a workaround for a hardware errata. "
456 "Like b2b_mw_idx, negative values index from the last available memory "
457 "window. (Applies on Xeon platforms with SB01BASE_LOCKUP errata.)");
459 static int g_ntb_mw_idx = -1;
460 SYSCTL_INT(_hw_ntb, OID_AUTO, b2b_mw_idx, CTLFLAG_RDTUN, &g_ntb_mw_idx,
461 0, "Use this memory window to access the peer NTB registers. A "
462 "non-negative value starts from the first MW index; a negative value "
463 "starts from the last MW index. The default is -1, i.e., the last "
464 "available memory window. Both sides of the NTB MUST set the same "
465 "value here! (Applies on Xeon platforms with SDOORBELL_LOCKUP errata.)");
467 /* Hardware owns the low 16 bits of features. */
468 #define NTB_BAR_SIZE_4K (1 << 0)
469 #define NTB_SDOORBELL_LOCKUP (1 << 1)
470 #define NTB_SB01BASE_LOCKUP (1 << 2)
471 #define NTB_B2BDOORBELL_BIT14 (1 << 3)
472 /* Software/configuration owns the top 16 bits. */
473 #define NTB_SPLIT_BAR (1ull << 16)
475 #define NTB_FEATURES_STR \
476 "\20\21SPLIT_BAR4\04B2B_DOORBELL_BIT14\03SB01BASE_LOCKUP" \
477 "\02SDOORBELL_LOCKUP\01BAR_SIZE_4K"
479 static struct ntb_hw_info pci_ids[] = {
480 /* XXX: PS/SS IDs left out until they are supported. */
481 { 0x0C4E8086, "BWD Atom Processor S1200 Non-Transparent Bridge B2B",
484 { 0x37258086, "JSF Xeon C35xx/C55xx Non-Transparent Bridge B2B",
485 NTB_XEON, NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 },
486 { 0x3C0D8086, "SNB Xeon E5/Core i7 Non-Transparent Bridge B2B",
487 NTB_XEON, NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 },
488 { 0x0E0D8086, "IVT Xeon E5 V2 Non-Transparent Bridge B2B", NTB_XEON,
489 NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 |
490 NTB_SB01BASE_LOCKUP | NTB_BAR_SIZE_4K },
491 { 0x2F0D8086, "HSX Xeon E5 V3 Non-Transparent Bridge B2B", NTB_XEON,
492 NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 |
493 NTB_SB01BASE_LOCKUP },
494 { 0x6F0D8086, "BDX Xeon E5 V4 Non-Transparent Bridge B2B", NTB_XEON,
495 NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 |
496 NTB_SB01BASE_LOCKUP },
498 { 0x00000000, NULL, NTB_ATOM, 0 }
501 static const struct ntb_reg atom_reg = {
502 .ntb_ctl = ATOM_NTBCNTL_OFFSET,
503 .lnk_sta = ATOM_LINK_STATUS_OFFSET,
504 .db_size = sizeof(uint64_t),
505 .mw_bar = { NTB_B2B_BAR_1, NTB_B2B_BAR_2 },
508 static const struct ntb_alt_reg atom_pri_reg = {
509 .db_bell = ATOM_PDOORBELL_OFFSET,
510 .db_mask = ATOM_PDBMSK_OFFSET,
511 .spad = ATOM_SPAD_OFFSET,
514 static const struct ntb_alt_reg atom_b2b_reg = {
515 .db_bell = ATOM_B2B_DOORBELL_OFFSET,
516 .spad = ATOM_B2B_SPAD_OFFSET,
519 static const struct ntb_xlat_reg atom_sec_xlat = {
521 /* "FIXME" says the Linux driver. */
522 .bar0_base = ATOM_SBAR0BASE_OFFSET,
523 .bar2_base = ATOM_SBAR2BASE_OFFSET,
524 .bar4_base = ATOM_SBAR4BASE_OFFSET,
526 .bar2_limit = ATOM_SBAR2LMT_OFFSET,
527 .bar4_limit = ATOM_SBAR4LMT_OFFSET,
530 .bar2_xlat = ATOM_SBAR2XLAT_OFFSET,
531 .bar4_xlat = ATOM_SBAR4XLAT_OFFSET,
534 static const struct ntb_reg xeon_reg = {
535 .ntb_ctl = XEON_NTBCNTL_OFFSET,
536 .lnk_sta = XEON_LINK_STATUS_OFFSET,
537 .db_size = sizeof(uint16_t),
538 .mw_bar = { NTB_B2B_BAR_1, NTB_B2B_BAR_2, NTB_B2B_BAR_3 },
541 static const struct ntb_alt_reg xeon_pri_reg = {
542 .db_bell = XEON_PDOORBELL_OFFSET,
543 .db_mask = XEON_PDBMSK_OFFSET,
544 .spad = XEON_SPAD_OFFSET,
547 static const struct ntb_alt_reg xeon_b2b_reg = {
548 .db_bell = XEON_B2B_DOORBELL_OFFSET,
549 .spad = XEON_B2B_SPAD_OFFSET,
552 static const struct ntb_xlat_reg xeon_sec_xlat = {
553 .bar0_base = XEON_SBAR0BASE_OFFSET,
554 .bar2_base = XEON_SBAR2BASE_OFFSET,
555 .bar4_base = XEON_SBAR4BASE_OFFSET,
556 .bar5_base = XEON_SBAR5BASE_OFFSET,
558 .bar2_limit = XEON_SBAR2LMT_OFFSET,
559 .bar4_limit = XEON_SBAR4LMT_OFFSET,
560 .bar5_limit = XEON_SBAR5LMT_OFFSET,
562 .bar2_xlat = XEON_SBAR2XLAT_OFFSET,
563 .bar4_xlat = XEON_SBAR4XLAT_OFFSET,
564 .bar5_xlat = XEON_SBAR5XLAT_OFFSET,
567 static struct ntb_b2b_addr xeon_b2b_usd_addr = {
568 .bar0_addr = XEON_B2B_BAR0_ADDR,
569 .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
570 .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
571 .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
572 .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
575 static struct ntb_b2b_addr xeon_b2b_dsd_addr = {
576 .bar0_addr = XEON_B2B_BAR0_ADDR,
577 .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
578 .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
579 .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
580 .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
583 SYSCTL_NODE(_hw_ntb, OID_AUTO, xeon_b2b, CTLFLAG_RW, 0,
584 "B2B MW segment overrides -- MUST be the same on both sides");
586 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar2_addr64, CTLFLAG_RDTUN,
587 &xeon_b2b_usd_addr.bar2_addr64, 0, "If using B2B topology on Xeon "
588 "hardware, use this 64-bit address on the bus between the NTB devices for "
589 "the window at BAR2, on the upstream side of the link. MUST be the same "
590 "address on both sides.");
591 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar4_addr64, CTLFLAG_RDTUN,
592 &xeon_b2b_usd_addr.bar4_addr64, 0, "See usd_bar2_addr64, but BAR4.");
593 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar4_addr32, CTLFLAG_RDTUN,
594 &xeon_b2b_usd_addr.bar4_addr32, 0, "See usd_bar2_addr64, but BAR4 "
595 "(split-BAR mode).");
596 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar5_addr32, CTLFLAG_RDTUN,
597 &xeon_b2b_usd_addr.bar5_addr32, 0, "See usd_bar2_addr64, but BAR5 "
598 "(split-BAR mode).");
600 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar2_addr64, CTLFLAG_RDTUN,
601 &xeon_b2b_dsd_addr.bar2_addr64, 0, "If using B2B topology on Xeon "
602 "hardware, use this 64-bit address on the bus between the NTB devices for "
603 "the window at BAR2, on the downstream side of the link. MUST be the same"
604 " address on both sides.");
605 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar4_addr64, CTLFLAG_RDTUN,
606 &xeon_b2b_dsd_addr.bar4_addr64, 0, "See dsd_bar2_addr64, but BAR4.");
607 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar4_addr32, CTLFLAG_RDTUN,
608 &xeon_b2b_dsd_addr.bar4_addr32, 0, "See dsd_bar2_addr64, but BAR4 "
609 "(split-BAR mode).");
610 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar5_addr32, CTLFLAG_RDTUN,
611 &xeon_b2b_dsd_addr.bar5_addr32, 0, "See dsd_bar2_addr64, but BAR5 "
612 "(split-BAR mode).");
615 * OS <-> Driver interface structures
617 MALLOC_DEFINE(M_NTB, "ntb_hw", "ntb_hw driver memory allocations");
620 * OS <-> Driver linkage functions
623 intel_ntb_probe(device_t device)
625 struct ntb_hw_info *p;
627 p = intel_ntb_get_device_info(pci_get_devid(device));
631 device_set_desc(device, p->desc);
636 intel_ntb_attach(device_t device)
638 struct ntb_softc *ntb;
639 struct ntb_hw_info *p;
642 ntb = device_get_softc(device);
643 p = intel_ntb_get_device_info(pci_get_devid(device));
645 ntb->device = device;
647 ntb->features = p->features;
648 ntb->b2b_mw_idx = B2B_MW_DISABLED;
649 ntb->msix_mw_idx = B2B_MW_DISABLED;
651 /* Heartbeat timer for NTB_ATOM since there is no link interrupt */
652 callout_init(&ntb->heartbeat_timer, 1);
653 callout_init(&ntb->lr_timer, 1);
654 callout_init(&ntb->peer_msix_work, 1);
655 mtx_init(&ntb->db_mask_lock, "ntb hw bits", NULL, MTX_SPIN);
657 if (ntb->type == NTB_ATOM)
658 error = intel_ntb_detect_atom(ntb);
660 error = intel_ntb_detect_xeon(ntb);
664 intel_ntb_detect_max_mw(ntb);
666 pci_enable_busmaster(ntb->device);
668 error = intel_ntb_map_pci_bars(ntb);
671 if (ntb->type == NTB_ATOM)
672 error = intel_ntb_atom_init_dev(ntb);
674 error = intel_ntb_xeon_init_dev(ntb);
678 intel_ntb_spad_clear(device);
680 intel_ntb_poll_link(ntb);
682 intel_ntb_sysctl_init(ntb);
684 /* Attach children to this controller */
685 error = ntb_register_device(device);
689 intel_ntb_detach(device);
694 intel_ntb_detach(device_t device)
696 struct ntb_softc *ntb;
698 ntb = device_get_softc(device);
700 /* Detach & delete all children */
701 ntb_unregister_device(device);
703 if (ntb->self_reg != NULL) {
705 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_valid_mask);
708 callout_drain(&ntb->heartbeat_timer);
709 callout_drain(&ntb->lr_timer);
710 callout_drain(&ntb->peer_msix_work);
711 pci_disable_busmaster(ntb->device);
712 if (ntb->type == NTB_XEON)
713 intel_ntb_teardown_xeon(ntb);
714 intel_ntb_teardown_interrupts(ntb);
716 mtx_destroy(&ntb->db_mask_lock);
718 intel_ntb_unmap_pci_bar(ntb);
724 * Driver internal routines
726 static inline enum ntb_bar
727 intel_ntb_mw_to_bar(struct ntb_softc *ntb, unsigned mw)
730 KASSERT(mw < ntb->mw_count,
731 ("%s: mw:%u > count:%u", __func__, mw, (unsigned)ntb->mw_count));
732 KASSERT(ntb->reg->mw_bar[mw] != 0, ("invalid mw"));
734 return (ntb->reg->mw_bar[mw]);
738 bar_is_64bit(struct ntb_softc *ntb, enum ntb_bar bar)
740 /* XXX This assertion could be stronger. */
741 KASSERT(bar < NTB_MAX_BARS, ("bogus bar"));
742 return (bar < NTB_B2B_BAR_2 || !HAS_FEATURE(ntb, NTB_SPLIT_BAR));
746 bar_get_xlat_params(struct ntb_softc *ntb, enum ntb_bar bar, uint32_t *base,
747 uint32_t *xlat, uint32_t *lmt)
749 uint32_t basev, lmtv, xlatv;
753 basev = ntb->xlat_reg->bar2_base;
754 lmtv = ntb->xlat_reg->bar2_limit;
755 xlatv = ntb->xlat_reg->bar2_xlat;
758 basev = ntb->xlat_reg->bar4_base;
759 lmtv = ntb->xlat_reg->bar4_limit;
760 xlatv = ntb->xlat_reg->bar4_xlat;
763 basev = ntb->xlat_reg->bar5_base;
764 lmtv = ntb->xlat_reg->bar5_limit;
765 xlatv = ntb->xlat_reg->bar5_xlat;
768 KASSERT(bar >= NTB_B2B_BAR_1 && bar < NTB_MAX_BARS,
770 basev = lmtv = xlatv = 0;
783 intel_ntb_map_pci_bars(struct ntb_softc *ntb)
787 ntb->bar_info[NTB_CONFIG_BAR].pci_resource_id = PCIR_BAR(0);
788 rc = map_mmr_bar(ntb, &ntb->bar_info[NTB_CONFIG_BAR]);
792 ntb->bar_info[NTB_B2B_BAR_1].pci_resource_id = PCIR_BAR(2);
793 rc = map_memory_window_bar(ntb, &ntb->bar_info[NTB_B2B_BAR_1]);
796 ntb->bar_info[NTB_B2B_BAR_1].psz_off = XEON_PBAR23SZ_OFFSET;
797 ntb->bar_info[NTB_B2B_BAR_1].ssz_off = XEON_SBAR23SZ_OFFSET;
798 ntb->bar_info[NTB_B2B_BAR_1].pbarxlat_off = XEON_PBAR2XLAT_OFFSET;
800 ntb->bar_info[NTB_B2B_BAR_2].pci_resource_id = PCIR_BAR(4);
801 rc = map_memory_window_bar(ntb, &ntb->bar_info[NTB_B2B_BAR_2]);
804 ntb->bar_info[NTB_B2B_BAR_2].psz_off = XEON_PBAR4SZ_OFFSET;
805 ntb->bar_info[NTB_B2B_BAR_2].ssz_off = XEON_SBAR4SZ_OFFSET;
806 ntb->bar_info[NTB_B2B_BAR_2].pbarxlat_off = XEON_PBAR4XLAT_OFFSET;
808 if (!HAS_FEATURE(ntb, NTB_SPLIT_BAR))
811 ntb->bar_info[NTB_B2B_BAR_3].pci_resource_id = PCIR_BAR(5);
812 rc = map_memory_window_bar(ntb, &ntb->bar_info[NTB_B2B_BAR_3]);
813 ntb->bar_info[NTB_B2B_BAR_3].psz_off = XEON_PBAR5SZ_OFFSET;
814 ntb->bar_info[NTB_B2B_BAR_3].ssz_off = XEON_SBAR5SZ_OFFSET;
815 ntb->bar_info[NTB_B2B_BAR_3].pbarxlat_off = XEON_PBAR5XLAT_OFFSET;
819 device_printf(ntb->device,
820 "unable to allocate pci resource\n");
825 print_map_success(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar,
829 device_printf(ntb->device,
830 "Mapped BAR%d v:[%p-%p] p:[%p-%p] (0x%jx bytes) (%s)\n",
831 PCI_RID2BAR(bar->pci_resource_id), bar->vbase,
832 (char *)bar->vbase + bar->size - 1,
833 (void *)bar->pbase, (void *)(bar->pbase + bar->size - 1),
834 (uintmax_t)bar->size, kind);
838 map_mmr_bar(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar)
841 bar->pci_resource = bus_alloc_resource_any(ntb->device, SYS_RES_MEMORY,
842 &bar->pci_resource_id, RF_ACTIVE);
843 if (bar->pci_resource == NULL)
846 save_bar_parameters(bar);
847 bar->map_mode = VM_MEMATTR_UNCACHEABLE;
848 print_map_success(ntb, bar, "mmr");
853 map_memory_window_bar(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar)
856 vm_memattr_t mapmode;
857 uint8_t bar_size_bits = 0;
859 bar->pci_resource = bus_alloc_resource_any(ntb->device, SYS_RES_MEMORY,
860 &bar->pci_resource_id, RF_ACTIVE);
862 if (bar->pci_resource == NULL)
865 save_bar_parameters(bar);
867 * Ivytown NTB BAR sizes are misreported by the hardware due to a
868 * hardware issue. To work around this, query the size it should be
869 * configured to by the device and modify the resource to correspond to
870 * this new size. The BIOS on systems with this problem is required to
871 * provide enough address space to allow the driver to make this change
874 * Ideally I could have just specified the size when I allocated the
876 * bus_alloc_resource(ntb->device,
877 * SYS_RES_MEMORY, &bar->pci_resource_id, 0ul, ~0ul,
878 * 1ul << bar_size_bits, RF_ACTIVE);
879 * but the PCI driver does not honor the size in this call, so we have
880 * to modify it after the fact.
882 if (HAS_FEATURE(ntb, NTB_BAR_SIZE_4K)) {
883 if (bar->pci_resource_id == PCIR_BAR(2))
884 bar_size_bits = pci_read_config(ntb->device,
885 XEON_PBAR23SZ_OFFSET, 1);
887 bar_size_bits = pci_read_config(ntb->device,
888 XEON_PBAR45SZ_OFFSET, 1);
890 rc = bus_adjust_resource(ntb->device, SYS_RES_MEMORY,
891 bar->pci_resource, bar->pbase,
892 bar->pbase + (1ul << bar_size_bits) - 1);
894 device_printf(ntb->device,
895 "unable to resize bar\n");
899 save_bar_parameters(bar);
902 bar->map_mode = VM_MEMATTR_UNCACHEABLE;
903 print_map_success(ntb, bar, "mw");
906 * Optionally, mark MW BARs as anything other than UC to improve
909 mapmode = intel_ntb_pat_flags();
910 if (mapmode == bar->map_mode)
913 rc = pmap_change_attr((vm_offset_t)bar->vbase, bar->size, mapmode);
915 bar->map_mode = mapmode;
916 device_printf(ntb->device,
917 "Marked BAR%d v:[%p-%p] p:[%p-%p] as "
919 PCI_RID2BAR(bar->pci_resource_id), bar->vbase,
920 (char *)bar->vbase + bar->size - 1,
921 (void *)bar->pbase, (void *)(bar->pbase + bar->size - 1),
922 intel_ntb_vm_memattr_to_str(mapmode));
924 device_printf(ntb->device,
925 "Unable to mark BAR%d v:[%p-%p] p:[%p-%p] as "
927 PCI_RID2BAR(bar->pci_resource_id), bar->vbase,
928 (char *)bar->vbase + bar->size - 1,
929 (void *)bar->pbase, (void *)(bar->pbase + bar->size - 1),
930 intel_ntb_vm_memattr_to_str(mapmode), rc);
936 intel_ntb_unmap_pci_bar(struct ntb_softc *ntb)
938 struct ntb_pci_bar_info *current_bar;
941 for (i = 0; i < NTB_MAX_BARS; i++) {
942 current_bar = &ntb->bar_info[i];
943 if (current_bar->pci_resource != NULL)
944 bus_release_resource(ntb->device, SYS_RES_MEMORY,
945 current_bar->pci_resource_id,
946 current_bar->pci_resource);
951 intel_ntb_setup_msix(struct ntb_softc *ntb, uint32_t num_vectors)
956 for (i = 0; i < num_vectors; i++) {
957 ntb->int_info[i].rid = i + 1;
958 ntb->int_info[i].res = bus_alloc_resource_any(ntb->device,
959 SYS_RES_IRQ, &ntb->int_info[i].rid, RF_ACTIVE);
960 if (ntb->int_info[i].res == NULL) {
961 device_printf(ntb->device,
962 "bus_alloc_resource failed\n");
965 ntb->int_info[i].tag = NULL;
966 ntb->allocated_interrupts++;
967 rc = bus_setup_intr(ntb->device, ntb->int_info[i].res,
968 INTR_MPSAFE | INTR_TYPE_MISC, NULL, ndev_vec_isr,
969 &ntb->msix_vec[i], &ntb->int_info[i].tag);
971 device_printf(ntb->device, "bus_setup_intr failed\n");
979 * The Linux NTB driver drops from MSI-X to legacy INTx if a unique vector
980 * cannot be allocated for each MSI-X message. JHB seems to think remapping
981 * should be okay. This tunable should enable us to test that hypothesis
982 * when someone gets their hands on some Xeon hardware.
984 static int ntb_force_remap_mode;
985 SYSCTL_INT(_hw_ntb, OID_AUTO, force_remap_mode, CTLFLAG_RDTUN,
986 &ntb_force_remap_mode, 0, "If enabled, force MSI-X messages to be remapped"
987 " to a smaller number of ithreads, even if the desired number are "
991 * In case it is NOT ok, give consumers an abort button.
993 static int ntb_prefer_intx;
994 SYSCTL_INT(_hw_ntb, OID_AUTO, prefer_intx_to_remap, CTLFLAG_RDTUN,
995 &ntb_prefer_intx, 0, "If enabled, prefer to use legacy INTx mode rather "
996 "than remapping MSI-X messages over available slots (match Linux driver "
1000 * Remap the desired number of MSI-X messages to available ithreads in a simple
1001 * round-robin fashion.
1004 intel_ntb_remap_msix(device_t dev, uint32_t desired, uint32_t avail)
1010 if (ntb_prefer_intx != 0)
1013 vectors = malloc(desired * sizeof(*vectors), M_NTB, M_ZERO | M_WAITOK);
1015 for (i = 0; i < desired; i++)
1016 vectors[i] = (i % avail) + 1;
1018 rc = pci_remap_msix(dev, desired, vectors);
1019 free(vectors, M_NTB);
1024 intel_ntb_init_isr(struct ntb_softc *ntb)
1026 uint32_t desired_vectors, num_vectors;
1029 ntb->allocated_interrupts = 0;
1030 ntb->last_ts = ticks;
1033 * Mask all doorbell interrupts. (Except link events!)
1036 ntb->db_mask = ntb->db_valid_mask;
1037 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1038 DB_MASK_UNLOCK(ntb);
1040 num_vectors = desired_vectors = MIN(pci_msix_count(ntb->device),
1042 if (desired_vectors >= 1) {
1043 rc = pci_alloc_msix(ntb->device, &num_vectors);
1045 if (ntb_force_remap_mode != 0 && rc == 0 &&
1046 num_vectors == desired_vectors)
1049 if (rc == 0 && num_vectors < desired_vectors) {
1050 rc = intel_ntb_remap_msix(ntb->device, desired_vectors,
1053 num_vectors = desired_vectors;
1055 pci_release_msi(ntb->device);
1062 if (ntb->type == NTB_XEON && num_vectors < ntb->db_vec_count) {
1063 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1064 device_printf(ntb->device,
1065 "Errata workaround does not support MSI or INTX\n");
1069 ntb->db_vec_count = 1;
1070 ntb->db_vec_shift = XEON_DB_TOTAL_SHIFT;
1071 rc = intel_ntb_setup_legacy_interrupt(ntb);
1073 if (num_vectors - 1 != XEON_NONLINK_DB_MSIX_BITS &&
1074 HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1075 device_printf(ntb->device,
1076 "Errata workaround expects %d doorbell bits\n",
1077 XEON_NONLINK_DB_MSIX_BITS);
1081 intel_ntb_create_msix_vec(ntb, num_vectors);
1082 rc = intel_ntb_setup_msix(ntb, num_vectors);
1085 device_printf(ntb->device,
1086 "Error allocating interrupts: %d\n", rc);
1087 intel_ntb_free_msix_vec(ntb);
1094 intel_ntb_setup_legacy_interrupt(struct ntb_softc *ntb)
1098 ntb->int_info[0].rid = 0;
1099 ntb->int_info[0].res = bus_alloc_resource_any(ntb->device, SYS_RES_IRQ,
1100 &ntb->int_info[0].rid, RF_SHAREABLE|RF_ACTIVE);
1101 if (ntb->int_info[0].res == NULL) {
1102 device_printf(ntb->device, "bus_alloc_resource failed\n");
1106 ntb->int_info[0].tag = NULL;
1107 ntb->allocated_interrupts = 1;
1109 rc = bus_setup_intr(ntb->device, ntb->int_info[0].res,
1110 INTR_MPSAFE | INTR_TYPE_MISC, NULL, ndev_irq_isr,
1111 ntb, &ntb->int_info[0].tag);
1113 device_printf(ntb->device, "bus_setup_intr failed\n");
1121 intel_ntb_teardown_interrupts(struct ntb_softc *ntb)
1123 struct ntb_int_info *current_int;
1126 for (i = 0; i < ntb->allocated_interrupts; i++) {
1127 current_int = &ntb->int_info[i];
1128 if (current_int->tag != NULL)
1129 bus_teardown_intr(ntb->device, current_int->res,
1132 if (current_int->res != NULL)
1133 bus_release_resource(ntb->device, SYS_RES_IRQ,
1134 rman_get_rid(current_int->res), current_int->res);
1137 intel_ntb_free_msix_vec(ntb);
1138 pci_release_msi(ntb->device);
1142 * Doorbell register and mask are 64-bit on Atom, 16-bit on Xeon. Abstract it
1143 * out to make code clearer.
1145 static inline uint64_t
1146 db_ioread(struct ntb_softc *ntb, uint64_t regoff)
1149 if (ntb->type == NTB_ATOM)
1150 return (intel_ntb_reg_read(8, regoff));
1152 KASSERT(ntb->type == NTB_XEON, ("bad ntb type"));
1154 return (intel_ntb_reg_read(2, regoff));
1158 db_iowrite(struct ntb_softc *ntb, uint64_t regoff, uint64_t val)
1161 KASSERT((val & ~ntb->db_valid_mask) == 0,
1162 ("%s: Invalid bits 0x%jx (valid: 0x%jx)", __func__,
1163 (uintmax_t)(val & ~ntb->db_valid_mask),
1164 (uintmax_t)ntb->db_valid_mask));
1166 if (regoff == ntb->self_reg->db_mask)
1167 DB_MASK_ASSERT(ntb, MA_OWNED);
1168 db_iowrite_raw(ntb, regoff, val);
1172 db_iowrite_raw(struct ntb_softc *ntb, uint64_t regoff, uint64_t val)
1175 if (ntb->type == NTB_ATOM) {
1176 intel_ntb_reg_write(8, regoff, val);
1180 KASSERT(ntb->type == NTB_XEON, ("bad ntb type"));
1181 intel_ntb_reg_write(2, regoff, (uint16_t)val);
1185 intel_ntb_db_set_mask(device_t dev, uint64_t bits)
1187 struct ntb_softc *ntb = device_get_softc(dev);
1190 ntb->db_mask |= bits;
1191 if (!HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP))
1192 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1193 DB_MASK_UNLOCK(ntb);
1197 intel_ntb_db_clear_mask(device_t dev, uint64_t bits)
1199 struct ntb_softc *ntb = device_get_softc(dev);
1203 KASSERT((bits & ~ntb->db_valid_mask) == 0,
1204 ("%s: Invalid bits 0x%jx (valid: 0x%jx)", __func__,
1205 (uintmax_t)(bits & ~ntb->db_valid_mask),
1206 (uintmax_t)ntb->db_valid_mask));
1209 ibits = ntb->fake_db_bell & ntb->db_mask & bits;
1210 ntb->db_mask &= ~bits;
1211 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1212 /* Simulate fake interrupts if unmasked DB bits are set. */
1213 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
1214 if ((ibits & intel_ntb_db_vector_mask(dev, i)) != 0)
1215 swi_sched(ntb->int_info[i].tag, 0);
1218 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1220 DB_MASK_UNLOCK(ntb);
1224 intel_ntb_db_read(device_t dev)
1226 struct ntb_softc *ntb = device_get_softc(dev);
1228 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP))
1229 return (ntb->fake_db_bell);
1231 return (db_ioread(ntb, ntb->self_reg->db_bell));
1235 intel_ntb_db_clear(device_t dev, uint64_t bits)
1237 struct ntb_softc *ntb = device_get_softc(dev);
1239 KASSERT((bits & ~ntb->db_valid_mask) == 0,
1240 ("%s: Invalid bits 0x%jx (valid: 0x%jx)", __func__,
1241 (uintmax_t)(bits & ~ntb->db_valid_mask),
1242 (uintmax_t)ntb->db_valid_mask));
1244 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1246 ntb->fake_db_bell &= ~bits;
1247 DB_MASK_UNLOCK(ntb);
1251 db_iowrite(ntb, ntb->self_reg->db_bell, bits);
1254 static inline uint64_t
1255 intel_ntb_vec_mask(struct ntb_softc *ntb, uint64_t db_vector)
1257 uint64_t shift, mask;
1259 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1261 * Remap vectors in custom way to make at least first
1262 * three doorbells to not generate stray events.
1263 * This breaks Linux compatibility (if one existed)
1264 * when more then one DB is used (not by if_ntb).
1266 if (db_vector < XEON_NONLINK_DB_MSIX_BITS - 1)
1267 return (1 << db_vector);
1268 if (db_vector == XEON_NONLINK_DB_MSIX_BITS - 1)
1272 shift = ntb->db_vec_shift;
1273 mask = (1ull << shift) - 1;
1274 return (mask << (shift * db_vector));
1278 intel_ntb_interrupt(struct ntb_softc *ntb, uint32_t vec)
1282 ntb->last_ts = ticks;
1283 vec_mask = intel_ntb_vec_mask(ntb, vec);
1285 if ((vec_mask & ntb->db_link_mask) != 0) {
1286 if (intel_ntb_poll_link(ntb))
1287 ntb_link_event(ntb->device);
1290 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP) &&
1291 (vec_mask & ntb->db_link_mask) == 0) {
1294 /* Do not report same DB events again if not cleared yet. */
1295 vec_mask &= ~ntb->fake_db_bell;
1297 /* Update our internal doorbell register. */
1298 ntb->fake_db_bell |= vec_mask;
1300 /* Do not report masked DB events. */
1301 vec_mask &= ~ntb->db_mask;
1303 DB_MASK_UNLOCK(ntb);
1306 if ((vec_mask & ntb->db_valid_mask) != 0)
1307 ntb_db_event(ntb->device, vec);
1311 ndev_vec_isr(void *arg)
1313 struct ntb_vec *nvec = arg;
1315 intel_ntb_interrupt(nvec->ntb, nvec->num);
1319 ndev_irq_isr(void *arg)
1321 /* If we couldn't set up MSI-X, we only have the one vector. */
1322 intel_ntb_interrupt(arg, 0);
1326 intel_ntb_create_msix_vec(struct ntb_softc *ntb, uint32_t num_vectors)
1330 ntb->msix_vec = malloc(num_vectors * sizeof(*ntb->msix_vec), M_NTB,
1332 for (i = 0; i < num_vectors; i++) {
1333 ntb->msix_vec[i].num = i;
1334 ntb->msix_vec[i].ntb = ntb;
1341 intel_ntb_free_msix_vec(struct ntb_softc *ntb)
1344 if (ntb->msix_vec == NULL)
1347 free(ntb->msix_vec, M_NTB);
1348 ntb->msix_vec = NULL;
1352 intel_ntb_get_msix_info(struct ntb_softc *ntb)
1354 struct pci_devinfo *dinfo;
1355 struct pcicfg_msix *msix;
1356 uint32_t laddr, data, i, offset;
1358 dinfo = device_get_ivars(ntb->device);
1359 msix = &dinfo->cfg.msix;
1361 CTASSERT(XEON_NONLINK_DB_MSIX_BITS == nitems(ntb->msix_data));
1363 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
1364 offset = msix->msix_table_offset + i * PCI_MSIX_ENTRY_SIZE;
1366 laddr = bus_read_4(msix->msix_table_res, offset +
1367 PCI_MSIX_ENTRY_LOWER_ADDR);
1368 intel_ntb_printf(2, "local MSIX addr(%u): 0x%x\n", i, laddr);
1370 KASSERT((laddr & MSI_INTEL_ADDR_BASE) == MSI_INTEL_ADDR_BASE,
1371 ("local MSIX addr 0x%x not in MSI base 0x%x", laddr,
1372 MSI_INTEL_ADDR_BASE));
1373 ntb->msix_data[i].nmd_ofs = laddr;
1375 data = bus_read_4(msix->msix_table_res, offset +
1376 PCI_MSIX_ENTRY_DATA);
1377 intel_ntb_printf(2, "local MSIX data(%u): 0x%x\n", i, data);
1379 ntb->msix_data[i].nmd_data = data;
1383 static struct ntb_hw_info *
1384 intel_ntb_get_device_info(uint32_t device_id)
1386 struct ntb_hw_info *ep = pci_ids;
1388 while (ep->device_id) {
1389 if (ep->device_id == device_id)
1397 intel_ntb_teardown_xeon(struct ntb_softc *ntb)
1400 if (ntb->reg != NULL)
1401 intel_ntb_link_disable(ntb->device);
1405 intel_ntb_detect_max_mw(struct ntb_softc *ntb)
1408 if (ntb->type == NTB_ATOM) {
1409 ntb->mw_count = ATOM_MW_COUNT;
1413 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR))
1414 ntb->mw_count = XEON_HSX_SPLIT_MW_COUNT;
1416 ntb->mw_count = XEON_SNB_MW_COUNT;
1420 intel_ntb_detect_xeon(struct ntb_softc *ntb)
1422 uint8_t ppd, conn_type;
1424 ppd = pci_read_config(ntb->device, NTB_PPD_OFFSET, 1);
1427 if ((ppd & XEON_PPD_DEV_TYPE) != 0)
1428 ntb->dev_type = NTB_DEV_DSD;
1430 ntb->dev_type = NTB_DEV_USD;
1432 if ((ppd & XEON_PPD_SPLIT_BAR) != 0)
1433 ntb->features |= NTB_SPLIT_BAR;
1435 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP) &&
1436 !HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
1437 device_printf(ntb->device,
1438 "Can not apply SB01BASE_LOCKUP workaround "
1439 "with split BARs disabled!\n");
1440 device_printf(ntb->device,
1441 "Expect system hangs under heavy NTB traffic!\n");
1442 ntb->features &= ~NTB_SB01BASE_LOCKUP;
1446 * SDOORBELL errata workaround gets in the way of SB01BASE_LOCKUP
1447 * errata workaround; only do one at a time.
1449 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP))
1450 ntb->features &= ~NTB_SDOORBELL_LOCKUP;
1452 conn_type = ppd & XEON_PPD_CONN_TYPE;
1453 switch (conn_type) {
1455 ntb->conn_type = conn_type;
1458 case NTB_CONN_TRANSPARENT:
1460 device_printf(ntb->device, "Unsupported connection type: %u\n",
1461 (unsigned)conn_type);
1468 intel_ntb_detect_atom(struct ntb_softc *ntb)
1470 uint32_t ppd, conn_type;
1472 ppd = pci_read_config(ntb->device, NTB_PPD_OFFSET, 4);
1475 if ((ppd & ATOM_PPD_DEV_TYPE) != 0)
1476 ntb->dev_type = NTB_DEV_DSD;
1478 ntb->dev_type = NTB_DEV_USD;
1480 conn_type = (ppd & ATOM_PPD_CONN_TYPE) >> 8;
1481 switch (conn_type) {
1483 ntb->conn_type = conn_type;
1486 device_printf(ntb->device, "Unsupported NTB configuration\n");
1493 intel_ntb_xeon_init_dev(struct ntb_softc *ntb)
1497 ntb->spad_count = XEON_SPAD_COUNT;
1498 ntb->db_count = XEON_DB_COUNT;
1499 ntb->db_link_mask = XEON_DB_LINK_BIT;
1500 ntb->db_vec_count = XEON_DB_MSIX_VECTOR_COUNT;
1501 ntb->db_vec_shift = XEON_DB_MSIX_VECTOR_SHIFT;
1503 if (ntb->conn_type != NTB_CONN_B2B) {
1504 device_printf(ntb->device, "Connection type %d not supported\n",
1509 ntb->reg = &xeon_reg;
1510 ntb->self_reg = &xeon_pri_reg;
1511 ntb->peer_reg = &xeon_b2b_reg;
1512 ntb->xlat_reg = &xeon_sec_xlat;
1514 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1515 ntb->fake_db_bell = 0;
1516 ntb->msix_mw_idx = (ntb->mw_count + g_ntb_msix_idx) %
1518 intel_ntb_printf(2, "Setting up MSIX mw idx %d means %u\n",
1519 g_ntb_msix_idx, ntb->msix_mw_idx);
1520 rc = intel_ntb_mw_set_wc_internal(ntb, ntb->msix_mw_idx,
1521 VM_MEMATTR_UNCACHEABLE);
1522 KASSERT(rc == 0, ("shouldn't fail"));
1523 } else if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP)) {
1525 * There is a Xeon hardware errata related to writes to SDOORBELL or
1526 * B2BDOORBELL in conjunction with inbound access to NTB MMIO space,
1527 * which may hang the system. To workaround this, use a memory
1528 * window to access the interrupt and scratch pad registers on the
1531 ntb->b2b_mw_idx = (ntb->mw_count + g_ntb_mw_idx) %
1533 intel_ntb_printf(2, "Setting up b2b mw idx %d means %u\n",
1534 g_ntb_mw_idx, ntb->b2b_mw_idx);
1535 rc = intel_ntb_mw_set_wc_internal(ntb, ntb->b2b_mw_idx,
1536 VM_MEMATTR_UNCACHEABLE);
1537 KASSERT(rc == 0, ("shouldn't fail"));
1538 } else if (HAS_FEATURE(ntb, NTB_B2BDOORBELL_BIT14))
1540 * HW Errata on bit 14 of b2bdoorbell register. Writes will not be
1541 * mirrored to the remote system. Shrink the number of bits by one,
1542 * since bit 14 is the last bit.
1544 * On REGS_THRU_MW errata mode, we don't use the b2bdoorbell register
1545 * anyway. Nor for non-B2B connection types.
1547 ntb->db_count = XEON_DB_COUNT - 1;
1549 ntb->db_valid_mask = (1ull << ntb->db_count) - 1;
1551 if (ntb->dev_type == NTB_DEV_USD)
1552 rc = xeon_setup_b2b_mw(ntb, &xeon_b2b_dsd_addr,
1553 &xeon_b2b_usd_addr);
1555 rc = xeon_setup_b2b_mw(ntb, &xeon_b2b_usd_addr,
1556 &xeon_b2b_dsd_addr);
1560 /* Enable Bus Master and Memory Space on the secondary side */
1561 intel_ntb_reg_write(2, XEON_SPCICMD_OFFSET,
1562 PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
1565 * Mask all doorbell interrupts.
1568 ntb->db_mask = ntb->db_valid_mask;
1569 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1570 DB_MASK_UNLOCK(ntb);
1572 rc = intel_ntb_init_isr(ntb);
1577 intel_ntb_atom_init_dev(struct ntb_softc *ntb)
1581 KASSERT(ntb->conn_type == NTB_CONN_B2B,
1582 ("Unsupported NTB configuration (%d)\n", ntb->conn_type));
1584 ntb->spad_count = ATOM_SPAD_COUNT;
1585 ntb->db_count = ATOM_DB_COUNT;
1586 ntb->db_vec_count = ATOM_DB_MSIX_VECTOR_COUNT;
1587 ntb->db_vec_shift = ATOM_DB_MSIX_VECTOR_SHIFT;
1588 ntb->db_valid_mask = (1ull << ntb->db_count) - 1;
1590 ntb->reg = &atom_reg;
1591 ntb->self_reg = &atom_pri_reg;
1592 ntb->peer_reg = &atom_b2b_reg;
1593 ntb->xlat_reg = &atom_sec_xlat;
1596 * FIXME - MSI-X bug on early Atom HW, remove once internal issue is
1597 * resolved. Mask transaction layer internal parity errors.
1599 pci_write_config(ntb->device, 0xFC, 0x4, 4);
1601 configure_atom_secondary_side_bars(ntb);
1603 /* Enable Bus Master and Memory Space on the secondary side */
1604 intel_ntb_reg_write(2, ATOM_SPCICMD_OFFSET,
1605 PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
1607 error = intel_ntb_init_isr(ntb);
1611 /* Initiate PCI-E link training */
1612 intel_ntb_link_enable(ntb->device, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
1614 callout_reset(&ntb->heartbeat_timer, 0, atom_link_hb, ntb);
1619 /* XXX: Linux driver doesn't seem to do any of this for Atom. */
1621 configure_atom_secondary_side_bars(struct ntb_softc *ntb)
1624 if (ntb->dev_type == NTB_DEV_USD) {
1625 intel_ntb_reg_write(8, ATOM_PBAR2XLAT_OFFSET,
1626 XEON_B2B_BAR2_ADDR64);
1627 intel_ntb_reg_write(8, ATOM_PBAR4XLAT_OFFSET,
1628 XEON_B2B_BAR4_ADDR64);
1629 intel_ntb_reg_write(8, ATOM_MBAR23_OFFSET, XEON_B2B_BAR2_ADDR64);
1630 intel_ntb_reg_write(8, ATOM_MBAR45_OFFSET, XEON_B2B_BAR4_ADDR64);
1632 intel_ntb_reg_write(8, ATOM_PBAR2XLAT_OFFSET,
1633 XEON_B2B_BAR2_ADDR64);
1634 intel_ntb_reg_write(8, ATOM_PBAR4XLAT_OFFSET,
1635 XEON_B2B_BAR4_ADDR64);
1636 intel_ntb_reg_write(8, ATOM_MBAR23_OFFSET, XEON_B2B_BAR2_ADDR64);
1637 intel_ntb_reg_write(8, ATOM_MBAR45_OFFSET, XEON_B2B_BAR4_ADDR64);
1643 * When working around Xeon SDOORBELL errata by remapping remote registers in a
1644 * MW, limit the B2B MW to half a MW. By sharing a MW, half the shared MW
1645 * remains for use by a higher layer.
1647 * Will only be used if working around SDOORBELL errata and the BIOS-configured
1648 * MW size is sufficiently large.
1650 static unsigned int ntb_b2b_mw_share;
1651 SYSCTL_UINT(_hw_ntb, OID_AUTO, b2b_mw_share, CTLFLAG_RDTUN, &ntb_b2b_mw_share,
1652 0, "If enabled (non-zero), prefer to share half of the B2B peer register "
1653 "MW with higher level consumers. Both sides of the NTB MUST set the same "
1657 xeon_reset_sbar_size(struct ntb_softc *ntb, enum ntb_bar idx,
1658 enum ntb_bar regbar)
1660 struct ntb_pci_bar_info *bar;
1663 if (!HAS_FEATURE(ntb, NTB_SPLIT_BAR) && idx >= NTB_B2B_BAR_3)
1666 bar = &ntb->bar_info[idx];
1667 bar_sz = pci_read_config(ntb->device, bar->psz_off, 1);
1668 if (idx == regbar) {
1669 if (ntb->b2b_off != 0)
1674 pci_write_config(ntb->device, bar->ssz_off, bar_sz, 1);
1675 bar_sz = pci_read_config(ntb->device, bar->ssz_off, 1);
1680 xeon_set_sbar_base_and_limit(struct ntb_softc *ntb, uint64_t bar_addr,
1681 enum ntb_bar idx, enum ntb_bar regbar)
1684 uint32_t base_reg, lmt_reg;
1686 bar_get_xlat_params(ntb, idx, &base_reg, NULL, &lmt_reg);
1687 if (idx == regbar) {
1689 bar_addr += ntb->b2b_off;
1694 if (!bar_is_64bit(ntb, idx)) {
1695 intel_ntb_reg_write(4, base_reg, bar_addr);
1696 reg_val = intel_ntb_reg_read(4, base_reg);
1699 intel_ntb_reg_write(4, lmt_reg, bar_addr);
1700 reg_val = intel_ntb_reg_read(4, lmt_reg);
1703 intel_ntb_reg_write(8, base_reg, bar_addr);
1704 reg_val = intel_ntb_reg_read(8, base_reg);
1707 intel_ntb_reg_write(8, lmt_reg, bar_addr);
1708 reg_val = intel_ntb_reg_read(8, lmt_reg);
1714 xeon_set_pbar_xlat(struct ntb_softc *ntb, uint64_t base_addr, enum ntb_bar idx)
1716 struct ntb_pci_bar_info *bar;
1718 bar = &ntb->bar_info[idx];
1719 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR) && idx >= NTB_B2B_BAR_2) {
1720 intel_ntb_reg_write(4, bar->pbarxlat_off, base_addr);
1721 base_addr = intel_ntb_reg_read(4, bar->pbarxlat_off);
1723 intel_ntb_reg_write(8, bar->pbarxlat_off, base_addr);
1724 base_addr = intel_ntb_reg_read(8, bar->pbarxlat_off);
1730 xeon_setup_b2b_mw(struct ntb_softc *ntb, const struct ntb_b2b_addr *addr,
1731 const struct ntb_b2b_addr *peer_addr)
1733 struct ntb_pci_bar_info *b2b_bar;
1736 enum ntb_bar b2b_bar_num, i;
1738 if (ntb->b2b_mw_idx == B2B_MW_DISABLED) {
1740 b2b_bar_num = NTB_CONFIG_BAR;
1743 b2b_bar_num = intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx);
1744 KASSERT(b2b_bar_num > 0 && b2b_bar_num < NTB_MAX_BARS,
1745 ("invalid b2b mw bar"));
1747 b2b_bar = &ntb->bar_info[b2b_bar_num];
1748 bar_size = b2b_bar->size;
1750 if (ntb_b2b_mw_share != 0 &&
1751 (bar_size >> 1) >= XEON_B2B_MIN_SIZE)
1752 ntb->b2b_off = bar_size >> 1;
1753 else if (bar_size >= XEON_B2B_MIN_SIZE) {
1756 device_printf(ntb->device,
1757 "B2B bar size is too small!\n");
1763 * Reset the secondary bar sizes to match the primary bar sizes.
1764 * (Except, disable or halve the size of the B2B secondary bar.)
1766 for (i = NTB_B2B_BAR_1; i < NTB_MAX_BARS; i++)
1767 xeon_reset_sbar_size(ntb, i, b2b_bar_num);
1770 if (b2b_bar_num == NTB_CONFIG_BAR)
1771 bar_addr = addr->bar0_addr;
1772 else if (b2b_bar_num == NTB_B2B_BAR_1)
1773 bar_addr = addr->bar2_addr64;
1774 else if (b2b_bar_num == NTB_B2B_BAR_2 && !HAS_FEATURE(ntb, NTB_SPLIT_BAR))
1775 bar_addr = addr->bar4_addr64;
1776 else if (b2b_bar_num == NTB_B2B_BAR_2)
1777 bar_addr = addr->bar4_addr32;
1778 else if (b2b_bar_num == NTB_B2B_BAR_3)
1779 bar_addr = addr->bar5_addr32;
1781 KASSERT(false, ("invalid bar"));
1783 intel_ntb_reg_write(8, XEON_SBAR0BASE_OFFSET, bar_addr);
1786 * Other SBARs are normally hit by the PBAR xlat, except for the b2b
1787 * register BAR. The B2B BAR is either disabled above or configured
1788 * half-size. It starts at PBAR xlat + offset.
1790 * Also set up incoming BAR limits == base (zero length window).
1792 xeon_set_sbar_base_and_limit(ntb, addr->bar2_addr64, NTB_B2B_BAR_1,
1794 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
1795 xeon_set_sbar_base_and_limit(ntb, addr->bar4_addr32,
1796 NTB_B2B_BAR_2, b2b_bar_num);
1797 xeon_set_sbar_base_and_limit(ntb, addr->bar5_addr32,
1798 NTB_B2B_BAR_3, b2b_bar_num);
1800 xeon_set_sbar_base_and_limit(ntb, addr->bar4_addr64,
1801 NTB_B2B_BAR_2, b2b_bar_num);
1803 /* Zero incoming translation addrs */
1804 intel_ntb_reg_write(8, XEON_SBAR2XLAT_OFFSET, 0);
1805 intel_ntb_reg_write(8, XEON_SBAR4XLAT_OFFSET, 0);
1807 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1808 uint32_t xlat_reg, lmt_reg;
1809 enum ntb_bar bar_num;
1812 * We point the chosen MSIX MW BAR xlat to remote LAPIC for
1815 bar_num = intel_ntb_mw_to_bar(ntb, ntb->msix_mw_idx);
1816 bar_get_xlat_params(ntb, bar_num, NULL, &xlat_reg, &lmt_reg);
1817 if (bar_is_64bit(ntb, bar_num)) {
1818 intel_ntb_reg_write(8, xlat_reg, MSI_INTEL_ADDR_BASE);
1819 ntb->msix_xlat = intel_ntb_reg_read(8, xlat_reg);
1820 intel_ntb_reg_write(8, lmt_reg, 0);
1822 intel_ntb_reg_write(4, xlat_reg, MSI_INTEL_ADDR_BASE);
1823 ntb->msix_xlat = intel_ntb_reg_read(4, xlat_reg);
1824 intel_ntb_reg_write(4, lmt_reg, 0);
1827 ntb->peer_lapic_bar = &ntb->bar_info[bar_num];
1829 (void)intel_ntb_reg_read(8, XEON_SBAR2XLAT_OFFSET);
1830 (void)intel_ntb_reg_read(8, XEON_SBAR4XLAT_OFFSET);
1832 /* Zero outgoing translation limits (whole bar size windows) */
1833 intel_ntb_reg_write(8, XEON_PBAR2LMT_OFFSET, 0);
1834 intel_ntb_reg_write(8, XEON_PBAR4LMT_OFFSET, 0);
1836 /* Set outgoing translation offsets */
1837 xeon_set_pbar_xlat(ntb, peer_addr->bar2_addr64, NTB_B2B_BAR_1);
1838 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
1839 xeon_set_pbar_xlat(ntb, peer_addr->bar4_addr32, NTB_B2B_BAR_2);
1840 xeon_set_pbar_xlat(ntb, peer_addr->bar5_addr32, NTB_B2B_BAR_3);
1842 xeon_set_pbar_xlat(ntb, peer_addr->bar4_addr64, NTB_B2B_BAR_2);
1844 /* Set the translation offset for B2B registers */
1846 if (b2b_bar_num == NTB_CONFIG_BAR)
1847 bar_addr = peer_addr->bar0_addr;
1848 else if (b2b_bar_num == NTB_B2B_BAR_1)
1849 bar_addr = peer_addr->bar2_addr64;
1850 else if (b2b_bar_num == NTB_B2B_BAR_2 && !HAS_FEATURE(ntb, NTB_SPLIT_BAR))
1851 bar_addr = peer_addr->bar4_addr64;
1852 else if (b2b_bar_num == NTB_B2B_BAR_2)
1853 bar_addr = peer_addr->bar4_addr32;
1854 else if (b2b_bar_num == NTB_B2B_BAR_3)
1855 bar_addr = peer_addr->bar5_addr32;
1857 KASSERT(false, ("invalid bar"));
1860 * B2B_XLAT_OFFSET is a 64-bit register but can only be written 32 bits
1863 intel_ntb_reg_write(4, XEON_B2B_XLAT_OFFSETL, bar_addr & 0xffffffff);
1864 intel_ntb_reg_write(4, XEON_B2B_XLAT_OFFSETU, bar_addr >> 32);
1869 _xeon_link_is_up(struct ntb_softc *ntb)
1872 if (ntb->conn_type == NTB_CONN_TRANSPARENT)
1874 return ((ntb->lnk_sta & NTB_LINK_STATUS_ACTIVE) != 0);
1878 link_is_up(struct ntb_softc *ntb)
1881 if (ntb->type == NTB_XEON)
1882 return (_xeon_link_is_up(ntb) && (ntb->peer_msix_good ||
1883 !HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)));
1885 KASSERT(ntb->type == NTB_ATOM, ("ntb type"));
1886 return ((ntb->ntb_ctl & ATOM_CNTL_LINK_DOWN) == 0);
1890 atom_link_is_err(struct ntb_softc *ntb)
1894 KASSERT(ntb->type == NTB_ATOM, ("ntb type"));
1896 status = intel_ntb_reg_read(4, ATOM_LTSSMSTATEJMP_OFFSET);
1897 if ((status & ATOM_LTSSMSTATEJMP_FORCEDETECT) != 0)
1900 status = intel_ntb_reg_read(4, ATOM_IBSTERRRCRVSTS0_OFFSET);
1901 return ((status & ATOM_IBIST_ERR_OFLOW) != 0);
1904 /* Atom does not have link status interrupt, poll on that platform */
1906 atom_link_hb(void *arg)
1908 struct ntb_softc *ntb = arg;
1909 sbintime_t timo, poll_ts;
1911 timo = NTB_HB_TIMEOUT * hz;
1912 poll_ts = ntb->last_ts + timo;
1915 * Delay polling the link status if an interrupt was received, unless
1916 * the cached link status says the link is down.
1918 if ((sbintime_t)ticks - poll_ts < 0 && link_is_up(ntb)) {
1919 timo = poll_ts - ticks;
1923 if (intel_ntb_poll_link(ntb))
1924 ntb_link_event(ntb->device);
1926 if (!link_is_up(ntb) && atom_link_is_err(ntb)) {
1927 /* Link is down with error, proceed with recovery */
1928 callout_reset(&ntb->lr_timer, 0, recover_atom_link, ntb);
1933 callout_reset(&ntb->heartbeat_timer, timo, atom_link_hb, ntb);
1937 atom_perform_link_restart(struct ntb_softc *ntb)
1941 /* Driver resets the NTB ModPhy lanes - magic! */
1942 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG6, 0xe0);
1943 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG4, 0x40);
1944 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG4, 0x60);
1945 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG6, 0x60);
1947 /* Driver waits 100ms to allow the NTB ModPhy to settle */
1948 pause("ModPhy", hz / 10);
1950 /* Clear AER Errors, write to clear */
1951 status = intel_ntb_reg_read(4, ATOM_ERRCORSTS_OFFSET);
1952 status &= PCIM_AER_COR_REPLAY_ROLLOVER;
1953 intel_ntb_reg_write(4, ATOM_ERRCORSTS_OFFSET, status);
1955 /* Clear unexpected electrical idle event in LTSSM, write to clear */
1956 status = intel_ntb_reg_read(4, ATOM_LTSSMERRSTS0_OFFSET);
1957 status |= ATOM_LTSSMERRSTS0_UNEXPECTEDEI;
1958 intel_ntb_reg_write(4, ATOM_LTSSMERRSTS0_OFFSET, status);
1960 /* Clear DeSkew Buffer error, write to clear */
1961 status = intel_ntb_reg_read(4, ATOM_DESKEWSTS_OFFSET);
1962 status |= ATOM_DESKEWSTS_DBERR;
1963 intel_ntb_reg_write(4, ATOM_DESKEWSTS_OFFSET, status);
1965 status = intel_ntb_reg_read(4, ATOM_IBSTERRRCRVSTS0_OFFSET);
1966 status &= ATOM_IBIST_ERR_OFLOW;
1967 intel_ntb_reg_write(4, ATOM_IBSTERRRCRVSTS0_OFFSET, status);
1969 /* Releases the NTB state machine to allow the link to retrain */
1970 status = intel_ntb_reg_read(4, ATOM_LTSSMSTATEJMP_OFFSET);
1971 status &= ~ATOM_LTSSMSTATEJMP_FORCEDETECT;
1972 intel_ntb_reg_write(4, ATOM_LTSSMSTATEJMP_OFFSET, status);
1976 intel_ntb_link_enable(device_t dev, enum ntb_speed speed __unused,
1977 enum ntb_width width __unused)
1979 struct ntb_softc *ntb = device_get_softc(dev);
1982 intel_ntb_printf(2, "%s\n", __func__);
1984 if (ntb->type == NTB_ATOM) {
1985 pci_write_config(ntb->device, NTB_PPD_OFFSET,
1986 ntb->ppd | ATOM_PPD_INIT_LINK, 4);
1990 if (ntb->conn_type == NTB_CONN_TRANSPARENT) {
1991 ntb_link_event(dev);
1995 cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
1996 cntl &= ~(NTB_CNTL_LINK_DISABLE | NTB_CNTL_CFG_LOCK);
1997 cntl |= NTB_CNTL_P2S_BAR23_SNOOP | NTB_CNTL_S2P_BAR23_SNOOP;
1998 cntl |= NTB_CNTL_P2S_BAR4_SNOOP | NTB_CNTL_S2P_BAR4_SNOOP;
1999 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR))
2000 cntl |= NTB_CNTL_P2S_BAR5_SNOOP | NTB_CNTL_S2P_BAR5_SNOOP;
2001 intel_ntb_reg_write(4, ntb->reg->ntb_ctl, cntl);
2006 intel_ntb_link_disable(device_t dev)
2008 struct ntb_softc *ntb = device_get_softc(dev);
2011 intel_ntb_printf(2, "%s\n", __func__);
2013 if (ntb->conn_type == NTB_CONN_TRANSPARENT) {
2014 ntb_link_event(dev);
2018 cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2019 cntl &= ~(NTB_CNTL_P2S_BAR23_SNOOP | NTB_CNTL_S2P_BAR23_SNOOP);
2020 cntl &= ~(NTB_CNTL_P2S_BAR4_SNOOP | NTB_CNTL_S2P_BAR4_SNOOP);
2021 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR))
2022 cntl &= ~(NTB_CNTL_P2S_BAR5_SNOOP | NTB_CNTL_S2P_BAR5_SNOOP);
2023 cntl |= NTB_CNTL_LINK_DISABLE | NTB_CNTL_CFG_LOCK;
2024 intel_ntb_reg_write(4, ntb->reg->ntb_ctl, cntl);
2029 intel_ntb_link_enabled(device_t dev)
2031 struct ntb_softc *ntb = device_get_softc(dev);
2034 if (ntb->type == NTB_ATOM) {
2035 cntl = pci_read_config(ntb->device, NTB_PPD_OFFSET, 4);
2036 return ((cntl & ATOM_PPD_INIT_LINK) != 0);
2039 if (ntb->conn_type == NTB_CONN_TRANSPARENT)
2042 cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2043 return ((cntl & NTB_CNTL_LINK_DISABLE) == 0);
2047 recover_atom_link(void *arg)
2049 struct ntb_softc *ntb = arg;
2050 unsigned speed, width, oldspeed, oldwidth;
2053 atom_perform_link_restart(ntb);
2056 * There is a potential race between the 2 NTB devices recovering at
2057 * the same time. If the times are the same, the link will not recover
2058 * and the driver will be stuck in this loop forever. Add a random
2059 * interval to the recovery time to prevent this race.
2061 status32 = arc4random() % ATOM_LINK_RECOVERY_TIME;
2062 pause("Link", (ATOM_LINK_RECOVERY_TIME + status32) * hz / 1000);
2064 if (atom_link_is_err(ntb))
2067 status32 = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2068 if ((status32 & ATOM_CNTL_LINK_DOWN) != 0)
2071 status32 = intel_ntb_reg_read(4, ntb->reg->lnk_sta);
2072 width = NTB_LNK_STA_WIDTH(status32);
2073 speed = status32 & NTB_LINK_SPEED_MASK;
2075 oldwidth = NTB_LNK_STA_WIDTH(ntb->lnk_sta);
2076 oldspeed = ntb->lnk_sta & NTB_LINK_SPEED_MASK;
2077 if (oldwidth != width || oldspeed != speed)
2081 callout_reset(&ntb->heartbeat_timer, NTB_HB_TIMEOUT * hz, atom_link_hb,
2086 callout_reset(&ntb->lr_timer, NTB_HB_TIMEOUT * hz, recover_atom_link,
2091 * Polls the HW link status register(s); returns true if something has changed.
2094 intel_ntb_poll_link(struct ntb_softc *ntb)
2099 if (ntb->type == NTB_ATOM) {
2100 ntb_cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2101 if (ntb_cntl == ntb->ntb_ctl)
2104 ntb->ntb_ctl = ntb_cntl;
2105 ntb->lnk_sta = intel_ntb_reg_read(4, ntb->reg->lnk_sta);
2107 db_iowrite_raw(ntb, ntb->self_reg->db_bell, ntb->db_link_mask);
2109 reg_val = pci_read_config(ntb->device, ntb->reg->lnk_sta, 2);
2110 if (reg_val == ntb->lnk_sta)
2113 ntb->lnk_sta = reg_val;
2115 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
2116 if (_xeon_link_is_up(ntb)) {
2117 if (!ntb->peer_msix_good) {
2118 callout_reset(&ntb->peer_msix_work, 0,
2119 intel_ntb_exchange_msix, ntb);
2123 ntb->peer_msix_good = false;
2124 ntb->peer_msix_done = false;
2131 static inline enum ntb_speed
2132 intel_ntb_link_sta_speed(struct ntb_softc *ntb)
2135 if (!link_is_up(ntb))
2136 return (NTB_SPEED_NONE);
2137 return (ntb->lnk_sta & NTB_LINK_SPEED_MASK);
2140 static inline enum ntb_width
2141 intel_ntb_link_sta_width(struct ntb_softc *ntb)
2144 if (!link_is_up(ntb))
2145 return (NTB_WIDTH_NONE);
2146 return (NTB_LNK_STA_WIDTH(ntb->lnk_sta));
2149 SYSCTL_NODE(_hw_ntb, OID_AUTO, debug_info, CTLFLAG_RW, 0,
2150 "Driver state, statistics, and HW registers");
2152 #define NTB_REGSZ_MASK (3ul << 30)
2153 #define NTB_REG_64 (1ul << 30)
2154 #define NTB_REG_32 (2ul << 30)
2155 #define NTB_REG_16 (3ul << 30)
2156 #define NTB_REG_8 (0ul << 30)
2158 #define NTB_DB_READ (1ul << 29)
2159 #define NTB_PCI_REG (1ul << 28)
2160 #define NTB_REGFLAGS_MASK (NTB_REGSZ_MASK | NTB_DB_READ | NTB_PCI_REG)
2163 intel_ntb_sysctl_init(struct ntb_softc *ntb)
2165 struct sysctl_oid_list *globals, *tree_par, *regpar, *statpar, *errpar;
2166 struct sysctl_ctx_list *ctx;
2167 struct sysctl_oid *tree, *tmptree;
2169 ctx = device_get_sysctl_ctx(ntb->device);
2170 globals = SYSCTL_CHILDREN(device_get_sysctl_tree(ntb->device));
2172 SYSCTL_ADD_PROC(ctx, globals, OID_AUTO, "link_status",
2173 CTLFLAG_RD | CTLTYPE_STRING, ntb, 0,
2174 sysctl_handle_link_status_human, "A",
2175 "Link status (human readable)");
2176 SYSCTL_ADD_PROC(ctx, globals, OID_AUTO, "active",
2177 CTLFLAG_RD | CTLTYPE_UINT, ntb, 0, sysctl_handle_link_status,
2178 "IU", "Link status (1=active, 0=inactive)");
2179 SYSCTL_ADD_PROC(ctx, globals, OID_AUTO, "admin_up",
2180 CTLFLAG_RW | CTLTYPE_UINT, ntb, 0, sysctl_handle_link_admin,
2181 "IU", "Set/get interface status (1=UP, 0=DOWN)");
2183 tree = SYSCTL_ADD_NODE(ctx, globals, OID_AUTO, "debug_info",
2184 CTLFLAG_RD, NULL, "Driver state, statistics, and HW registers");
2185 tree_par = SYSCTL_CHILDREN(tree);
2187 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "conn_type", CTLFLAG_RD,
2188 &ntb->conn_type, 0, "0 - Transparent; 1 - B2B; 2 - Root Port");
2189 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "dev_type", CTLFLAG_RD,
2190 &ntb->dev_type, 0, "0 - USD; 1 - DSD");
2191 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "ppd", CTLFLAG_RD,
2192 &ntb->ppd, 0, "Raw PPD register (cached)");
2194 if (ntb->b2b_mw_idx != B2B_MW_DISABLED) {
2195 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "b2b_idx", CTLFLAG_RD,
2196 &ntb->b2b_mw_idx, 0,
2197 "Index of the MW used for B2B remote register access");
2198 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "b2b_off",
2199 CTLFLAG_RD, &ntb->b2b_off,
2200 "If non-zero, offset of B2B register region in shared MW");
2203 SYSCTL_ADD_PROC(ctx, tree_par, OID_AUTO, "features",
2204 CTLFLAG_RD | CTLTYPE_STRING, ntb, 0, sysctl_handle_features, "A",
2205 "Features/errata of this NTB device");
2207 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "ntb_ctl", CTLFLAG_RD,
2208 __DEVOLATILE(uint32_t *, &ntb->ntb_ctl), 0,
2209 "NTB CTL register (cached)");
2210 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "lnk_sta", CTLFLAG_RD,
2211 __DEVOLATILE(uint32_t *, &ntb->lnk_sta), 0,
2212 "LNK STA register (cached)");
2214 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "mw_count", CTLFLAG_RD,
2215 &ntb->mw_count, 0, "MW count");
2216 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "spad_count", CTLFLAG_RD,
2217 &ntb->spad_count, 0, "Scratchpad count");
2218 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "db_count", CTLFLAG_RD,
2219 &ntb->db_count, 0, "Doorbell count");
2220 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "db_vec_count", CTLFLAG_RD,
2221 &ntb->db_vec_count, 0, "Doorbell vector count");
2222 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "db_vec_shift", CTLFLAG_RD,
2223 &ntb->db_vec_shift, 0, "Doorbell vector shift");
2225 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "db_valid_mask", CTLFLAG_RD,
2226 &ntb->db_valid_mask, "Doorbell valid mask");
2227 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "db_link_mask", CTLFLAG_RD,
2228 &ntb->db_link_mask, "Doorbell link mask");
2229 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "db_mask", CTLFLAG_RD,
2230 &ntb->db_mask, "Doorbell mask (cached)");
2232 tmptree = SYSCTL_ADD_NODE(ctx, tree_par, OID_AUTO, "registers",
2233 CTLFLAG_RD, NULL, "Raw HW registers (big-endian)");
2234 regpar = SYSCTL_CHILDREN(tmptree);
2236 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "ntbcntl",
2237 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb, NTB_REG_32 |
2238 ntb->reg->ntb_ctl, sysctl_handle_register, "IU",
2239 "NTB Control register");
2240 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "lnkcap",
2241 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb, NTB_REG_32 |
2242 0x19c, sysctl_handle_register, "IU",
2243 "NTB Link Capabilities");
2244 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "lnkcon",
2245 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb, NTB_REG_32 |
2246 0x1a0, sysctl_handle_register, "IU",
2247 "NTB Link Control register");
2249 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "db_mask",
2250 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2251 NTB_REG_64 | NTB_DB_READ | ntb->self_reg->db_mask,
2252 sysctl_handle_register, "QU", "Doorbell mask register");
2253 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "db_bell",
2254 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2255 NTB_REG_64 | NTB_DB_READ | ntb->self_reg->db_bell,
2256 sysctl_handle_register, "QU", "Doorbell register");
2258 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat23",
2259 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2260 NTB_REG_64 | ntb->xlat_reg->bar2_xlat,
2261 sysctl_handle_register, "QU", "Incoming XLAT23 register");
2262 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2263 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat4",
2264 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2265 NTB_REG_32 | ntb->xlat_reg->bar4_xlat,
2266 sysctl_handle_register, "IU", "Incoming XLAT4 register");
2267 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat5",
2268 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2269 NTB_REG_32 | ntb->xlat_reg->bar5_xlat,
2270 sysctl_handle_register, "IU", "Incoming XLAT5 register");
2272 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat45",
2273 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2274 NTB_REG_64 | ntb->xlat_reg->bar4_xlat,
2275 sysctl_handle_register, "QU", "Incoming XLAT45 register");
2278 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt23",
2279 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2280 NTB_REG_64 | ntb->xlat_reg->bar2_limit,
2281 sysctl_handle_register, "QU", "Incoming LMT23 register");
2282 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2283 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt4",
2284 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2285 NTB_REG_32 | ntb->xlat_reg->bar4_limit,
2286 sysctl_handle_register, "IU", "Incoming LMT4 register");
2287 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt5",
2288 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2289 NTB_REG_32 | ntb->xlat_reg->bar5_limit,
2290 sysctl_handle_register, "IU", "Incoming LMT5 register");
2292 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt45",
2293 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2294 NTB_REG_64 | ntb->xlat_reg->bar4_limit,
2295 sysctl_handle_register, "QU", "Incoming LMT45 register");
2298 if (ntb->type == NTB_ATOM)
2301 tmptree = SYSCTL_ADD_NODE(ctx, regpar, OID_AUTO, "xeon_stats",
2302 CTLFLAG_RD, NULL, "Xeon HW statistics");
2303 statpar = SYSCTL_CHILDREN(tmptree);
2304 SYSCTL_ADD_PROC(ctx, statpar, OID_AUTO, "upstream_mem_miss",
2305 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2306 NTB_REG_16 | XEON_USMEMMISS_OFFSET,
2307 sysctl_handle_register, "SU", "Upstream Memory Miss");
2309 tmptree = SYSCTL_ADD_NODE(ctx, regpar, OID_AUTO, "xeon_hw_err",
2310 CTLFLAG_RD, NULL, "Xeon HW errors");
2311 errpar = SYSCTL_CHILDREN(tmptree);
2313 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "ppd",
2314 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2315 NTB_REG_8 | NTB_PCI_REG | NTB_PPD_OFFSET,
2316 sysctl_handle_register, "CU", "PPD");
2318 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "pbar23_sz",
2319 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2320 NTB_REG_8 | NTB_PCI_REG | XEON_PBAR23SZ_OFFSET,
2321 sysctl_handle_register, "CU", "PBAR23 SZ (log2)");
2322 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "pbar4_sz",
2323 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2324 NTB_REG_8 | NTB_PCI_REG | XEON_PBAR4SZ_OFFSET,
2325 sysctl_handle_register, "CU", "PBAR4 SZ (log2)");
2326 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "pbar5_sz",
2327 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2328 NTB_REG_8 | NTB_PCI_REG | XEON_PBAR5SZ_OFFSET,
2329 sysctl_handle_register, "CU", "PBAR5 SZ (log2)");
2331 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar23_sz",
2332 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2333 NTB_REG_8 | NTB_PCI_REG | XEON_SBAR23SZ_OFFSET,
2334 sysctl_handle_register, "CU", "SBAR23 SZ (log2)");
2335 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar4_sz",
2336 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2337 NTB_REG_8 | NTB_PCI_REG | XEON_SBAR4SZ_OFFSET,
2338 sysctl_handle_register, "CU", "SBAR4 SZ (log2)");
2339 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar5_sz",
2340 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2341 NTB_REG_8 | NTB_PCI_REG | XEON_SBAR5SZ_OFFSET,
2342 sysctl_handle_register, "CU", "SBAR5 SZ (log2)");
2344 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "devsts",
2345 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2346 NTB_REG_16 | NTB_PCI_REG | XEON_DEVSTS_OFFSET,
2347 sysctl_handle_register, "SU", "DEVSTS");
2348 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "lnksts",
2349 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2350 NTB_REG_16 | NTB_PCI_REG | XEON_LINK_STATUS_OFFSET,
2351 sysctl_handle_register, "SU", "LNKSTS");
2352 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "slnksts",
2353 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2354 NTB_REG_16 | NTB_PCI_REG | XEON_SLINK_STATUS_OFFSET,
2355 sysctl_handle_register, "SU", "SLNKSTS");
2357 SYSCTL_ADD_PROC(ctx, errpar, OID_AUTO, "uncerrsts",
2358 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2359 NTB_REG_32 | NTB_PCI_REG | XEON_UNCERRSTS_OFFSET,
2360 sysctl_handle_register, "IU", "UNCERRSTS");
2361 SYSCTL_ADD_PROC(ctx, errpar, OID_AUTO, "corerrsts",
2362 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2363 NTB_REG_32 | NTB_PCI_REG | XEON_CORERRSTS_OFFSET,
2364 sysctl_handle_register, "IU", "CORERRSTS");
2366 if (ntb->conn_type != NTB_CONN_B2B)
2369 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat23",
2370 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2371 NTB_REG_64 | ntb->bar_info[NTB_B2B_BAR_1].pbarxlat_off,
2372 sysctl_handle_register, "QU", "Outgoing XLAT23 register");
2373 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2374 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat4",
2375 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2376 NTB_REG_32 | ntb->bar_info[NTB_B2B_BAR_2].pbarxlat_off,
2377 sysctl_handle_register, "IU", "Outgoing XLAT4 register");
2378 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat5",
2379 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2380 NTB_REG_32 | ntb->bar_info[NTB_B2B_BAR_3].pbarxlat_off,
2381 sysctl_handle_register, "IU", "Outgoing XLAT5 register");
2383 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat45",
2384 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2385 NTB_REG_64 | ntb->bar_info[NTB_B2B_BAR_2].pbarxlat_off,
2386 sysctl_handle_register, "QU", "Outgoing XLAT45 register");
2389 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt23",
2390 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2391 NTB_REG_64 | XEON_PBAR2LMT_OFFSET,
2392 sysctl_handle_register, "QU", "Outgoing LMT23 register");
2393 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2394 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt4",
2395 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2396 NTB_REG_32 | XEON_PBAR4LMT_OFFSET,
2397 sysctl_handle_register, "IU", "Outgoing LMT4 register");
2398 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt5",
2399 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2400 NTB_REG_32 | XEON_PBAR5LMT_OFFSET,
2401 sysctl_handle_register, "IU", "Outgoing LMT5 register");
2403 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt45",
2404 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2405 NTB_REG_64 | XEON_PBAR4LMT_OFFSET,
2406 sysctl_handle_register, "QU", "Outgoing LMT45 register");
2409 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar01_base",
2410 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2411 NTB_REG_64 | ntb->xlat_reg->bar0_base,
2412 sysctl_handle_register, "QU", "Secondary BAR01 base register");
2413 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar23_base",
2414 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2415 NTB_REG_64 | ntb->xlat_reg->bar2_base,
2416 sysctl_handle_register, "QU", "Secondary BAR23 base register");
2417 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2418 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar4_base",
2419 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2420 NTB_REG_32 | ntb->xlat_reg->bar4_base,
2421 sysctl_handle_register, "IU",
2422 "Secondary BAR4 base register");
2423 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar5_base",
2424 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2425 NTB_REG_32 | ntb->xlat_reg->bar5_base,
2426 sysctl_handle_register, "IU",
2427 "Secondary BAR5 base register");
2429 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar45_base",
2430 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2431 NTB_REG_64 | ntb->xlat_reg->bar4_base,
2432 sysctl_handle_register, "QU",
2433 "Secondary BAR45 base register");
2438 sysctl_handle_features(SYSCTL_HANDLER_ARGS)
2440 struct ntb_softc *ntb = arg1;
2444 sbuf_new_for_sysctl(&sb, NULL, 256, req);
2446 sbuf_printf(&sb, "%b", ntb->features, NTB_FEATURES_STR);
2447 error = sbuf_finish(&sb);
2450 if (error || !req->newptr)
2456 sysctl_handle_link_admin(SYSCTL_HANDLER_ARGS)
2458 struct ntb_softc *ntb = arg1;
2462 old = intel_ntb_link_enabled(ntb->device);
2464 error = SYSCTL_OUT(req, &old, sizeof(old));
2465 if (error != 0 || req->newptr == NULL)
2468 error = SYSCTL_IN(req, &new, sizeof(new));
2472 intel_ntb_printf(0, "Admin set interface state to '%sabled'\n",
2473 (new != 0)? "en" : "dis");
2476 error = intel_ntb_link_enable(ntb->device, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
2478 error = intel_ntb_link_disable(ntb->device);
2483 sysctl_handle_link_status_human(SYSCTL_HANDLER_ARGS)
2485 struct ntb_softc *ntb = arg1;
2487 enum ntb_speed speed;
2488 enum ntb_width width;
2491 sbuf_new_for_sysctl(&sb, NULL, 32, req);
2493 if (intel_ntb_link_is_up(ntb->device, &speed, &width))
2494 sbuf_printf(&sb, "up / PCIe Gen %u / Width x%u",
2495 (unsigned)speed, (unsigned)width);
2497 sbuf_printf(&sb, "down");
2499 error = sbuf_finish(&sb);
2502 if (error || !req->newptr)
2508 sysctl_handle_link_status(SYSCTL_HANDLER_ARGS)
2510 struct ntb_softc *ntb = arg1;
2514 res = intel_ntb_link_is_up(ntb->device, NULL, NULL);
2516 error = SYSCTL_OUT(req, &res, sizeof(res));
2517 if (error || !req->newptr)
2523 sysctl_handle_register(SYSCTL_HANDLER_ARGS)
2525 struct ntb_softc *ntb;
2529 char be[sizeof(umv)];
2536 reg = arg2 & ~NTB_REGFLAGS_MASK;
2537 sz = arg2 & NTB_REGSZ_MASK;
2538 db = (arg2 & NTB_DB_READ) != 0;
2539 pci = (arg2 & NTB_PCI_REG) != 0;
2541 KASSERT(!(db && pci), ("bogus"));
2544 KASSERT(sz == NTB_REG_64, ("bogus"));
2545 umv = db_ioread(ntb, reg);
2546 outsz = sizeof(uint64_t);
2551 umv = pci_read_config(ntb->device, reg, 8);
2553 umv = intel_ntb_reg_read(8, reg);
2554 outsz = sizeof(uint64_t);
2558 umv = pci_read_config(ntb->device, reg, 4);
2560 umv = intel_ntb_reg_read(4, reg);
2561 outsz = sizeof(uint32_t);
2565 umv = pci_read_config(ntb->device, reg, 2);
2567 umv = intel_ntb_reg_read(2, reg);
2568 outsz = sizeof(uint16_t);
2572 umv = pci_read_config(ntb->device, reg, 1);
2574 umv = intel_ntb_reg_read(1, reg);
2575 outsz = sizeof(uint8_t);
2583 /* Encode bigendian so that sysctl -x is legible. */
2585 outp = ((char *)be) + sizeof(umv) - outsz;
2587 error = SYSCTL_OUT(req, outp, outsz);
2588 if (error || !req->newptr)
2594 intel_ntb_user_mw_to_idx(struct ntb_softc *ntb, unsigned uidx)
2597 if ((ntb->b2b_mw_idx != B2B_MW_DISABLED && ntb->b2b_off == 0 &&
2598 uidx >= ntb->b2b_mw_idx) ||
2599 (ntb->msix_mw_idx != B2B_MW_DISABLED && uidx >= ntb->msix_mw_idx))
2601 if ((ntb->b2b_mw_idx != B2B_MW_DISABLED && ntb->b2b_off == 0 &&
2602 uidx >= ntb->b2b_mw_idx) &&
2603 (ntb->msix_mw_idx != B2B_MW_DISABLED && uidx >= ntb->msix_mw_idx))
2608 #ifndef EARLY_AP_STARTUP
2609 static int msix_ready;
2612 intel_ntb_msix_ready(void *arg __unused)
2617 SYSINIT(intel_ntb_msix_ready, SI_SUB_SMP, SI_ORDER_ANY,
2618 intel_ntb_msix_ready, NULL);
2622 intel_ntb_exchange_msix(void *ctx)
2624 struct ntb_softc *ntb;
2630 if (ntb->peer_msix_good)
2632 if (ntb->peer_msix_done)
2635 #ifndef EARLY_AP_STARTUP
2636 /* Block MSIX negotiation until SMP started and IRQ reshuffled. */
2641 intel_ntb_get_msix_info(ntb);
2642 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
2643 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_DATA0 + i,
2644 ntb->msix_data[i].nmd_data);
2645 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_OFS0 + i,
2646 ntb->msix_data[i].nmd_ofs - ntb->msix_xlat);
2648 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_GUARD, NTB_MSIX_VER_GUARD);
2650 intel_ntb_spad_read(ntb->device, NTB_MSIX_GUARD, &val);
2651 if (val != NTB_MSIX_VER_GUARD)
2654 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
2655 intel_ntb_spad_read(ntb->device, NTB_MSIX_DATA0 + i, &val);
2656 intel_ntb_printf(2, "remote MSIX data(%u): 0x%x\n", i, val);
2657 ntb->peer_msix_data[i].nmd_data = val;
2658 intel_ntb_spad_read(ntb->device, NTB_MSIX_OFS0 + i, &val);
2659 intel_ntb_printf(2, "remote MSIX addr(%u): 0x%x\n", i, val);
2660 ntb->peer_msix_data[i].nmd_ofs = val;
2663 ntb->peer_msix_done = true;
2666 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_DONE, NTB_MSIX_RECEIVED);
2667 intel_ntb_spad_read(ntb->device, NTB_MSIX_DONE, &val);
2668 if (val != NTB_MSIX_RECEIVED)
2671 intel_ntb_spad_clear(ntb->device);
2672 ntb->peer_msix_good = true;
2673 /* Give peer time to see our NTB_MSIX_RECEIVED. */
2677 intel_ntb_poll_link(ntb);
2678 ntb_link_event(ntb->device);
2682 ntb->lnk_sta = pci_read_config(ntb->device, ntb->reg->lnk_sta, 2);
2683 if (_xeon_link_is_up(ntb)) {
2684 callout_reset(&ntb->peer_msix_work,
2685 hz * (ntb->peer_msix_good ? 2 : 1) / 100,
2686 intel_ntb_exchange_msix, ntb);
2688 intel_ntb_spad_clear(ntb->device);
2692 * Public API to the rest of the OS
2696 intel_ntb_spad_count(device_t dev)
2698 struct ntb_softc *ntb = device_get_softc(dev);
2700 return (ntb->spad_count);
2704 intel_ntb_mw_count(device_t dev)
2706 struct ntb_softc *ntb = device_get_softc(dev);
2709 res = ntb->mw_count;
2710 if (ntb->b2b_mw_idx != B2B_MW_DISABLED && ntb->b2b_off == 0)
2712 if (ntb->msix_mw_idx != B2B_MW_DISABLED)
2718 intel_ntb_spad_write(device_t dev, unsigned int idx, uint32_t val)
2720 struct ntb_softc *ntb = device_get_softc(dev);
2722 if (idx >= ntb->spad_count)
2725 intel_ntb_reg_write(4, ntb->self_reg->spad + idx * 4, val);
2731 * Zeros the local scratchpad.
2734 intel_ntb_spad_clear(device_t dev)
2736 struct ntb_softc *ntb = device_get_softc(dev);
2739 for (i = 0; i < ntb->spad_count; i++)
2740 intel_ntb_spad_write(dev, i, 0);
2744 intel_ntb_spad_read(device_t dev, unsigned int idx, uint32_t *val)
2746 struct ntb_softc *ntb = device_get_softc(dev);
2748 if (idx >= ntb->spad_count)
2751 *val = intel_ntb_reg_read(4, ntb->self_reg->spad + idx * 4);
2757 intel_ntb_peer_spad_write(device_t dev, unsigned int idx, uint32_t val)
2759 struct ntb_softc *ntb = device_get_softc(dev);
2761 if (idx >= ntb->spad_count)
2764 if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP))
2765 intel_ntb_mw_write(4, XEON_SPAD_OFFSET + idx * 4, val);
2767 intel_ntb_reg_write(4, ntb->peer_reg->spad + idx * 4, val);
2773 intel_ntb_peer_spad_read(device_t dev, unsigned int idx, uint32_t *val)
2775 struct ntb_softc *ntb = device_get_softc(dev);
2777 if (idx >= ntb->spad_count)
2780 if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP))
2781 *val = intel_ntb_mw_read(4, XEON_SPAD_OFFSET + idx * 4);
2783 *val = intel_ntb_reg_read(4, ntb->peer_reg->spad + idx * 4);
2789 intel_ntb_mw_get_range(device_t dev, unsigned mw_idx, vm_paddr_t *base,
2790 caddr_t *vbase, size_t *size, size_t *align, size_t *align_size,
2793 struct ntb_softc *ntb = device_get_softc(dev);
2794 struct ntb_pci_bar_info *bar;
2797 enum ntb_bar bar_num;
2799 if (mw_idx >= intel_ntb_mw_count(dev))
2801 mw_idx = intel_ntb_user_mw_to_idx(ntb, mw_idx);
2803 bar_num = intel_ntb_mw_to_bar(ntb, mw_idx);
2804 bar = &ntb->bar_info[bar_num];
2806 if (mw_idx == ntb->b2b_mw_idx) {
2807 KASSERT(ntb->b2b_off != 0,
2808 ("user shouldn't get non-shared b2b mw"));
2809 bar_b2b_off = ntb->b2b_off;
2812 if (bar_is_64bit(ntb, bar_num))
2813 limit = BUS_SPACE_MAXADDR;
2815 limit = BUS_SPACE_MAXADDR_32BIT;
2818 *base = bar->pbase + bar_b2b_off;
2820 *vbase = bar->vbase + bar_b2b_off;
2822 *size = bar->size - bar_b2b_off;
2825 if (align_size != NULL)
2833 intel_ntb_mw_set_trans(device_t dev, unsigned idx, bus_addr_t addr, size_t size)
2835 struct ntb_softc *ntb = device_get_softc(dev);
2836 struct ntb_pci_bar_info *bar;
2837 uint64_t base, limit, reg_val;
2838 size_t bar_size, mw_size;
2839 uint32_t base_reg, xlat_reg, limit_reg;
2840 enum ntb_bar bar_num;
2842 if (idx >= intel_ntb_mw_count(dev))
2844 idx = intel_ntb_user_mw_to_idx(ntb, idx);
2846 bar_num = intel_ntb_mw_to_bar(ntb, idx);
2847 bar = &ntb->bar_info[bar_num];
2849 bar_size = bar->size;
2850 if (idx == ntb->b2b_mw_idx)
2851 mw_size = bar_size - ntb->b2b_off;
2855 /* Hardware requires that addr is aligned to bar size */
2856 if ((addr & (bar_size - 1)) != 0)
2862 bar_get_xlat_params(ntb, bar_num, &base_reg, &xlat_reg, &limit_reg);
2865 if (bar_is_64bit(ntb, bar_num)) {
2866 base = intel_ntb_reg_read(8, base_reg) & BAR_HIGH_MASK;
2868 if (limit_reg != 0 && size != mw_size)
2869 limit = base + size;
2871 /* Set and verify translation address */
2872 intel_ntb_reg_write(8, xlat_reg, addr);
2873 reg_val = intel_ntb_reg_read(8, xlat_reg) & BAR_HIGH_MASK;
2874 if (reg_val != addr) {
2875 intel_ntb_reg_write(8, xlat_reg, 0);
2879 /* Set and verify the limit */
2880 intel_ntb_reg_write(8, limit_reg, limit);
2881 reg_val = intel_ntb_reg_read(8, limit_reg) & BAR_HIGH_MASK;
2882 if (reg_val != limit) {
2883 intel_ntb_reg_write(8, limit_reg, base);
2884 intel_ntb_reg_write(8, xlat_reg, 0);
2888 /* Configure 32-bit (split) BAR MW */
2890 if ((addr & UINT32_MAX) != addr)
2892 if (((addr + size) & UINT32_MAX) != (addr + size))
2895 base = intel_ntb_reg_read(4, base_reg) & BAR_HIGH_MASK;
2897 if (limit_reg != 0 && size != mw_size)
2898 limit = base + size;
2900 /* Set and verify translation address */
2901 intel_ntb_reg_write(4, xlat_reg, addr);
2902 reg_val = intel_ntb_reg_read(4, xlat_reg) & BAR_HIGH_MASK;
2903 if (reg_val != addr) {
2904 intel_ntb_reg_write(4, xlat_reg, 0);
2908 /* Set and verify the limit */
2909 intel_ntb_reg_write(4, limit_reg, limit);
2910 reg_val = intel_ntb_reg_read(4, limit_reg) & BAR_HIGH_MASK;
2911 if (reg_val != limit) {
2912 intel_ntb_reg_write(4, limit_reg, base);
2913 intel_ntb_reg_write(4, xlat_reg, 0);
2921 intel_ntb_mw_clear_trans(device_t dev, unsigned mw_idx)
2924 return (intel_ntb_mw_set_trans(dev, mw_idx, 0, 0));
2928 intel_ntb_mw_get_wc(device_t dev, unsigned idx, vm_memattr_t *mode)
2930 struct ntb_softc *ntb = device_get_softc(dev);
2931 struct ntb_pci_bar_info *bar;
2933 if (idx >= intel_ntb_mw_count(dev))
2935 idx = intel_ntb_user_mw_to_idx(ntb, idx);
2937 bar = &ntb->bar_info[intel_ntb_mw_to_bar(ntb, idx)];
2938 *mode = bar->map_mode;
2943 intel_ntb_mw_set_wc(device_t dev, unsigned idx, vm_memattr_t mode)
2945 struct ntb_softc *ntb = device_get_softc(dev);
2947 if (idx >= intel_ntb_mw_count(dev))
2950 idx = intel_ntb_user_mw_to_idx(ntb, idx);
2951 return (intel_ntb_mw_set_wc_internal(ntb, idx, mode));
2955 intel_ntb_mw_set_wc_internal(struct ntb_softc *ntb, unsigned idx, vm_memattr_t mode)
2957 struct ntb_pci_bar_info *bar;
2960 bar = &ntb->bar_info[intel_ntb_mw_to_bar(ntb, idx)];
2961 if (bar->map_mode == mode)
2964 rc = pmap_change_attr((vm_offset_t)bar->vbase, bar->size, mode);
2966 bar->map_mode = mode;
2972 intel_ntb_peer_db_set(device_t dev, uint64_t bit)
2974 struct ntb_softc *ntb = device_get_softc(dev);
2976 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
2977 struct ntb_pci_bar_info *lapic;
2980 lapic = ntb->peer_lapic_bar;
2982 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
2983 if ((bit & intel_ntb_db_vector_mask(dev, i)) != 0)
2984 bus_space_write_4(lapic->pci_bus_tag,
2985 lapic->pci_bus_handle,
2986 ntb->peer_msix_data[i].nmd_ofs,
2987 ntb->peer_msix_data[i].nmd_data);
2992 if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP)) {
2993 intel_ntb_mw_write(2, XEON_PDOORBELL_OFFSET, bit);
2997 db_iowrite(ntb, ntb->peer_reg->db_bell, bit);
3001 intel_ntb_peer_db_addr(device_t dev, bus_addr_t *db_addr, vm_size_t *db_size)
3003 struct ntb_softc *ntb = device_get_softc(dev);
3004 struct ntb_pci_bar_info *bar;
3007 KASSERT((db_addr != NULL && db_size != NULL), ("must be non-NULL"));
3009 if (!HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP)) {
3010 bar = &ntb->bar_info[NTB_CONFIG_BAR];
3011 regoff = ntb->peer_reg->db_bell;
3013 KASSERT(ntb->b2b_mw_idx != B2B_MW_DISABLED,
3014 ("invalid b2b idx"));
3016 bar = &ntb->bar_info[intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx)];
3017 regoff = XEON_PDOORBELL_OFFSET;
3019 KASSERT(bar->pci_bus_tag != X86_BUS_SPACE_IO, ("uh oh"));
3021 /* HACK: Specific to current x86 bus implementation. */
3022 *db_addr = ((uint64_t)bar->pci_bus_handle + regoff);
3023 *db_size = ntb->reg->db_size;
3028 intel_ntb_db_valid_mask(device_t dev)
3030 struct ntb_softc *ntb = device_get_softc(dev);
3032 return (ntb->db_valid_mask);
3036 intel_ntb_db_vector_count(device_t dev)
3038 struct ntb_softc *ntb = device_get_softc(dev);
3040 return (ntb->db_vec_count);
3044 intel_ntb_db_vector_mask(device_t dev, uint32_t vector)
3046 struct ntb_softc *ntb = device_get_softc(dev);
3048 if (vector > ntb->db_vec_count)
3050 return (ntb->db_valid_mask & intel_ntb_vec_mask(ntb, vector));
3054 intel_ntb_link_is_up(device_t dev, enum ntb_speed *speed, enum ntb_width *width)
3056 struct ntb_softc *ntb = device_get_softc(dev);
3059 *speed = intel_ntb_link_sta_speed(ntb);
3061 *width = intel_ntb_link_sta_width(ntb);
3062 return (link_is_up(ntb));
3066 save_bar_parameters(struct ntb_pci_bar_info *bar)
3069 bar->pci_bus_tag = rman_get_bustag(bar->pci_resource);
3070 bar->pci_bus_handle = rman_get_bushandle(bar->pci_resource);
3071 bar->pbase = rman_get_start(bar->pci_resource);
3072 bar->size = rman_get_size(bar->pci_resource);
3073 bar->vbase = rman_get_virtual(bar->pci_resource);
3076 static device_method_t ntb_intel_methods[] = {
3077 /* Device interface */
3078 DEVMETHOD(device_probe, intel_ntb_probe),
3079 DEVMETHOD(device_attach, intel_ntb_attach),
3080 DEVMETHOD(device_detach, intel_ntb_detach),
3082 DEVMETHOD(ntb_link_is_up, intel_ntb_link_is_up),
3083 DEVMETHOD(ntb_link_enable, intel_ntb_link_enable),
3084 DEVMETHOD(ntb_link_disable, intel_ntb_link_disable),
3085 DEVMETHOD(ntb_link_enabled, intel_ntb_link_enabled),
3086 DEVMETHOD(ntb_mw_count, intel_ntb_mw_count),
3087 DEVMETHOD(ntb_mw_get_range, intel_ntb_mw_get_range),
3088 DEVMETHOD(ntb_mw_set_trans, intel_ntb_mw_set_trans),
3089 DEVMETHOD(ntb_mw_clear_trans, intel_ntb_mw_clear_trans),
3090 DEVMETHOD(ntb_mw_get_wc, intel_ntb_mw_get_wc),
3091 DEVMETHOD(ntb_mw_set_wc, intel_ntb_mw_set_wc),
3092 DEVMETHOD(ntb_spad_count, intel_ntb_spad_count),
3093 DEVMETHOD(ntb_spad_clear, intel_ntb_spad_clear),
3094 DEVMETHOD(ntb_spad_write, intel_ntb_spad_write),
3095 DEVMETHOD(ntb_spad_read, intel_ntb_spad_read),
3096 DEVMETHOD(ntb_peer_spad_write, intel_ntb_peer_spad_write),
3097 DEVMETHOD(ntb_peer_spad_read, intel_ntb_peer_spad_read),
3098 DEVMETHOD(ntb_db_valid_mask, intel_ntb_db_valid_mask),
3099 DEVMETHOD(ntb_db_vector_count, intel_ntb_db_vector_count),
3100 DEVMETHOD(ntb_db_vector_mask, intel_ntb_db_vector_mask),
3101 DEVMETHOD(ntb_db_clear, intel_ntb_db_clear),
3102 DEVMETHOD(ntb_db_clear_mask, intel_ntb_db_clear_mask),
3103 DEVMETHOD(ntb_db_read, intel_ntb_db_read),
3104 DEVMETHOD(ntb_db_set_mask, intel_ntb_db_set_mask),
3105 DEVMETHOD(ntb_peer_db_addr, intel_ntb_peer_db_addr),
3106 DEVMETHOD(ntb_peer_db_set, intel_ntb_peer_db_set),
3110 static DEFINE_CLASS_0(ntb_hw, ntb_intel_driver, ntb_intel_methods,
3111 sizeof(struct ntb_softc));
3112 DRIVER_MODULE(ntb_intel, pci, ntb_intel_driver, ntb_hw_devclass, NULL, NULL);
3113 MODULE_DEPEND(ntb_intel, ntb, 1, 1, 1);
3114 MODULE_VERSION(ntb_intel, 1);