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/pmap.h>
61 #include <machine/resource.h>
62 #include <dev/pci/pcireg.h>
63 #include <dev/pci/pcivar.h>
68 #define MAX_MSIX_INTERRUPTS MAX(XEON_DB_COUNT, ATOM_DB_COUNT)
70 #define NTB_HB_TIMEOUT 1 /* second */
71 #define ATOM_LINK_RECOVERY_TIME 500 /* ms */
72 #define BAR_HIGH_MASK (~((1ull << 12) - 1))
74 #define NTB_MSIX_VER_GUARD 0xaabbccdd
75 #define NTB_MSIX_RECEIVED 0xe0f0e0f0
78 * PCI constants could be somewhere more generic, but aren't defined/used in
81 #define PCI_MSIX_ENTRY_SIZE 16
82 #define PCI_MSIX_ENTRY_LOWER_ADDR 0
83 #define PCI_MSIX_ENTRY_UPPER_ADDR 4
84 #define PCI_MSIX_ENTRY_DATA 8
86 enum ntb_device_type {
91 /* ntb_conn_type are hardware numbers, cannot change. */
93 NTB_CONN_TRANSPARENT = 0,
98 enum ntb_b2b_direction {
123 /* Device features and workarounds */
124 #define HAS_FEATURE(ntb, feature) \
125 (((ntb)->features & (feature)) != 0)
130 enum ntb_device_type type;
134 struct ntb_pci_bar_info {
135 bus_space_tag_t pci_bus_tag;
136 bus_space_handle_t pci_bus_handle;
138 struct resource *pci_resource;
142 vm_memattr_t map_mode;
144 /* Configuration register offsets */
147 uint32_t pbarxlat_off;
150 struct ntb_int_info {
151 struct resource *res;
157 struct ntb_softc *ntb;
166 unsigned mw_bar[NTB_MAX_BARS];
175 struct ntb_xlat_reg {
190 struct ntb_b2b_addr {
192 uint64_t bar2_addr64;
193 uint64_t bar4_addr64;
194 uint64_t bar4_addr32;
195 uint64_t bar5_addr32;
198 struct ntb_msix_data {
204 /* ntb.c context. Do not move! Must go first! */
208 enum ntb_device_type type;
211 struct ntb_pci_bar_info bar_info[NTB_MAX_BARS];
212 struct ntb_int_info int_info[MAX_MSIX_INTERRUPTS];
213 uint32_t allocated_interrupts;
215 struct ntb_msix_data peer_msix_data[XEON_NONLINK_DB_MSIX_BITS];
216 struct ntb_msix_data msix_data[XEON_NONLINK_DB_MSIX_BITS];
219 struct ntb_pci_bar_info *peer_lapic_bar;
220 struct callout peer_msix_work;
222 struct callout heartbeat_timer;
223 struct callout lr_timer;
225 struct ntb_vec *msix_vec;
228 enum ntb_conn_type conn_type;
229 enum ntb_b2b_direction dev_type;
231 /* Offset of peer bar0 in B2B BAR */
233 /* Memory window used to access peer bar0 */
234 #define B2B_MW_DISABLED UINT8_MAX
242 uint8_t db_vec_count;
243 uint8_t db_vec_shift;
245 /* Protects local db_mask. */
246 #define DB_MASK_LOCK(sc) mtx_lock_spin(&(sc)->db_mask_lock)
247 #define DB_MASK_UNLOCK(sc) mtx_unlock_spin(&(sc)->db_mask_lock)
248 #define DB_MASK_ASSERT(sc,f) mtx_assert(&(sc)->db_mask_lock, (f))
249 struct mtx db_mask_lock;
251 volatile uint32_t ntb_ctl;
252 volatile uint32_t lnk_sta;
254 uint64_t db_valid_mask;
255 uint64_t db_link_mask;
257 uint64_t fake_db_bell; /* NTB_SB01BASE_LOCKUP*/
259 int last_ts; /* ticks @ last irq */
261 const struct ntb_reg *reg;
262 const struct ntb_alt_reg *self_reg;
263 const struct ntb_alt_reg *peer_reg;
264 const struct ntb_xlat_reg *xlat_reg;
268 static __inline uint64_t
269 bus_space_read_8(bus_space_tag_t tag, bus_space_handle_t handle,
273 return (bus_space_read_4(tag, handle, offset) |
274 ((uint64_t)bus_space_read_4(tag, handle, offset + 4)) << 32);
278 bus_space_write_8(bus_space_tag_t tag, bus_space_handle_t handle,
279 bus_size_t offset, uint64_t val)
282 bus_space_write_4(tag, handle, offset, val);
283 bus_space_write_4(tag, handle, offset + 4, val >> 32);
287 #define intel_ntb_bar_read(SIZE, bar, offset) \
288 bus_space_read_ ## SIZE (ntb->bar_info[(bar)].pci_bus_tag, \
289 ntb->bar_info[(bar)].pci_bus_handle, (offset))
290 #define intel_ntb_bar_write(SIZE, bar, offset, val) \
291 bus_space_write_ ## SIZE (ntb->bar_info[(bar)].pci_bus_tag, \
292 ntb->bar_info[(bar)].pci_bus_handle, (offset), (val))
293 #define intel_ntb_reg_read(SIZE, offset) \
294 intel_ntb_bar_read(SIZE, NTB_CONFIG_BAR, offset)
295 #define intel_ntb_reg_write(SIZE, offset, val) \
296 intel_ntb_bar_write(SIZE, NTB_CONFIG_BAR, offset, val)
297 #define intel_ntb_mw_read(SIZE, offset) \
298 intel_ntb_bar_read(SIZE, intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx), \
300 #define intel_ntb_mw_write(SIZE, offset, val) \
301 intel_ntb_bar_write(SIZE, intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx), \
304 static int intel_ntb_probe(device_t device);
305 static int intel_ntb_attach(device_t device);
306 static int intel_ntb_detach(device_t device);
307 static uint64_t intel_ntb_db_valid_mask(device_t dev);
308 static void intel_ntb_spad_clear(device_t dev);
309 static uint64_t intel_ntb_db_vector_mask(device_t dev, uint32_t vector);
310 static bool intel_ntb_link_is_up(device_t dev, enum ntb_speed *speed,
311 enum ntb_width *width);
312 static int intel_ntb_link_enable(device_t dev, enum ntb_speed speed,
313 enum ntb_width width);
314 static int intel_ntb_link_disable(device_t dev);
315 static int intel_ntb_spad_read(device_t dev, unsigned int idx, uint32_t *val);
316 static int intel_ntb_peer_spad_write(device_t dev, unsigned int idx, uint32_t val);
318 static unsigned intel_ntb_user_mw_to_idx(struct ntb_softc *, unsigned uidx);
319 static inline enum ntb_bar intel_ntb_mw_to_bar(struct ntb_softc *, unsigned mw);
320 static inline bool bar_is_64bit(struct ntb_softc *, enum ntb_bar);
321 static inline void bar_get_xlat_params(struct ntb_softc *, enum ntb_bar,
322 uint32_t *base, uint32_t *xlat, uint32_t *lmt);
323 static int intel_ntb_map_pci_bars(struct ntb_softc *ntb);
324 static int intel_ntb_mw_set_wc_internal(struct ntb_softc *, unsigned idx,
326 static void print_map_success(struct ntb_softc *, struct ntb_pci_bar_info *,
328 static int map_mmr_bar(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar);
329 static int map_memory_window_bar(struct ntb_softc *ntb,
330 struct ntb_pci_bar_info *bar);
331 static void intel_ntb_unmap_pci_bar(struct ntb_softc *ntb);
332 static int intel_ntb_remap_msix(device_t, uint32_t desired, uint32_t avail);
333 static int intel_ntb_init_isr(struct ntb_softc *ntb);
334 static int intel_ntb_setup_legacy_interrupt(struct ntb_softc *ntb);
335 static int intel_ntb_setup_msix(struct ntb_softc *ntb, uint32_t num_vectors);
336 static void intel_ntb_teardown_interrupts(struct ntb_softc *ntb);
337 static inline uint64_t intel_ntb_vec_mask(struct ntb_softc *, uint64_t db_vector);
338 static void intel_ntb_interrupt(struct ntb_softc *, uint32_t vec);
339 static void ndev_vec_isr(void *arg);
340 static void ndev_irq_isr(void *arg);
341 static inline uint64_t db_ioread(struct ntb_softc *, uint64_t regoff);
342 static inline void db_iowrite(struct ntb_softc *, uint64_t regoff, uint64_t);
343 static inline void db_iowrite_raw(struct ntb_softc *, uint64_t regoff, uint64_t);
344 static int intel_ntb_create_msix_vec(struct ntb_softc *ntb, uint32_t num_vectors);
345 static void intel_ntb_free_msix_vec(struct ntb_softc *ntb);
346 static void intel_ntb_get_msix_info(struct ntb_softc *ntb);
347 static void intel_ntb_exchange_msix(void *);
348 static struct ntb_hw_info *intel_ntb_get_device_info(uint32_t device_id);
349 static void intel_ntb_detect_max_mw(struct ntb_softc *ntb);
350 static int intel_ntb_detect_xeon(struct ntb_softc *ntb);
351 static int intel_ntb_detect_atom(struct ntb_softc *ntb);
352 static int intel_ntb_xeon_init_dev(struct ntb_softc *ntb);
353 static int intel_ntb_atom_init_dev(struct ntb_softc *ntb);
354 static void intel_ntb_teardown_xeon(struct ntb_softc *ntb);
355 static void configure_atom_secondary_side_bars(struct ntb_softc *ntb);
356 static void xeon_reset_sbar_size(struct ntb_softc *, enum ntb_bar idx,
357 enum ntb_bar regbar);
358 static void xeon_set_sbar_base_and_limit(struct ntb_softc *,
359 uint64_t base_addr, enum ntb_bar idx, enum ntb_bar regbar);
360 static void xeon_set_pbar_xlat(struct ntb_softc *, uint64_t base_addr,
362 static int xeon_setup_b2b_mw(struct ntb_softc *,
363 const struct ntb_b2b_addr *addr, const struct ntb_b2b_addr *peer_addr);
364 static inline bool link_is_up(struct ntb_softc *ntb);
365 static inline bool _xeon_link_is_up(struct ntb_softc *ntb);
366 static inline bool atom_link_is_err(struct ntb_softc *ntb);
367 static inline enum ntb_speed intel_ntb_link_sta_speed(struct ntb_softc *);
368 static inline enum ntb_width intel_ntb_link_sta_width(struct ntb_softc *);
369 static void atom_link_hb(void *arg);
370 static void recover_atom_link(void *arg);
371 static bool intel_ntb_poll_link(struct ntb_softc *ntb);
372 static void save_bar_parameters(struct ntb_pci_bar_info *bar);
373 static void intel_ntb_sysctl_init(struct ntb_softc *);
374 static int sysctl_handle_features(SYSCTL_HANDLER_ARGS);
375 static int sysctl_handle_link_admin(SYSCTL_HANDLER_ARGS);
376 static int sysctl_handle_link_status_human(SYSCTL_HANDLER_ARGS);
377 static int sysctl_handle_link_status(SYSCTL_HANDLER_ARGS);
378 static int sysctl_handle_register(SYSCTL_HANDLER_ARGS);
380 static unsigned g_ntb_hw_debug_level;
381 TUNABLE_INT("hw.ntb.debug_level", &g_ntb_hw_debug_level);
382 SYSCTL_UINT(_hw_ntb, OID_AUTO, debug_level, CTLFLAG_RWTUN,
383 &g_ntb_hw_debug_level, 0, "ntb_hw log level -- higher is more verbose");
384 #define intel_ntb_printf(lvl, ...) do { \
385 if ((lvl) <= g_ntb_hw_debug_level) { \
386 device_printf(ntb->device, __VA_ARGS__); \
390 #define _NTB_PAT_UC 0
391 #define _NTB_PAT_WC 1
392 #define _NTB_PAT_WT 4
393 #define _NTB_PAT_WP 5
394 #define _NTB_PAT_WB 6
395 #define _NTB_PAT_UCM 7
396 static unsigned g_ntb_mw_pat = _NTB_PAT_UC;
397 TUNABLE_INT("hw.ntb.default_mw_pat", &g_ntb_mw_pat);
398 SYSCTL_UINT(_hw_ntb, OID_AUTO, default_mw_pat, CTLFLAG_RDTUN,
399 &g_ntb_mw_pat, 0, "Configure the default memory window cache flags (PAT): "
400 "UC: " __XSTRING(_NTB_PAT_UC) ", "
401 "WC: " __XSTRING(_NTB_PAT_WC) ", "
402 "WT: " __XSTRING(_NTB_PAT_WT) ", "
403 "WP: " __XSTRING(_NTB_PAT_WP) ", "
404 "WB: " __XSTRING(_NTB_PAT_WB) ", "
405 "UC-: " __XSTRING(_NTB_PAT_UCM));
407 static inline vm_memattr_t
408 intel_ntb_pat_flags(void)
411 switch (g_ntb_mw_pat) {
413 return (VM_MEMATTR_WRITE_COMBINING);
415 return (VM_MEMATTR_WRITE_THROUGH);
417 return (VM_MEMATTR_WRITE_PROTECTED);
419 return (VM_MEMATTR_WRITE_BACK);
421 return (VM_MEMATTR_WEAK_UNCACHEABLE);
425 return (VM_MEMATTR_UNCACHEABLE);
430 * Well, this obviously doesn't belong here, but it doesn't seem to exist
431 * anywhere better yet.
433 static inline const char *
434 intel_ntb_vm_memattr_to_str(vm_memattr_t pat)
438 case VM_MEMATTR_WRITE_COMBINING:
439 return ("WRITE_COMBINING");
440 case VM_MEMATTR_WRITE_THROUGH:
441 return ("WRITE_THROUGH");
442 case VM_MEMATTR_WRITE_PROTECTED:
443 return ("WRITE_PROTECTED");
444 case VM_MEMATTR_WRITE_BACK:
445 return ("WRITE_BACK");
446 case VM_MEMATTR_WEAK_UNCACHEABLE:
448 case VM_MEMATTR_UNCACHEABLE:
449 return ("UNCACHEABLE");
455 static int g_ntb_msix_idx = 1;
456 TUNABLE_INT("hw.ntb.msix_mw_idx", &g_ntb_msix_idx);
457 SYSCTL_INT(_hw_ntb, OID_AUTO, msix_mw_idx, CTLFLAG_RDTUN, &g_ntb_msix_idx,
458 0, "Use this memory window to access the peer MSIX message complex on "
459 "certain Xeon-based NTB systems, as a workaround for a hardware errata. "
460 "Like b2b_mw_idx, negative values index from the last available memory "
461 "window. (Applies on Xeon platforms with SB01BASE_LOCKUP errata.)");
463 static int g_ntb_mw_idx = -1;
464 TUNABLE_INT("hw.ntb.b2b_mw_idx", &g_ntb_mw_idx);
465 SYSCTL_INT(_hw_ntb, OID_AUTO, b2b_mw_idx, CTLFLAG_RDTUN, &g_ntb_mw_idx,
466 0, "Use this memory window to access the peer NTB registers. A "
467 "non-negative value starts from the first MW index; a negative value "
468 "starts from the last MW index. The default is -1, i.e., the last "
469 "available memory window. Both sides of the NTB MUST set the same "
470 "value here! (Applies on Xeon platforms with SDOORBELL_LOCKUP errata.)");
472 /* Hardware owns the low 16 bits of features. */
473 #define NTB_BAR_SIZE_4K (1 << 0)
474 #define NTB_SDOORBELL_LOCKUP (1 << 1)
475 #define NTB_SB01BASE_LOCKUP (1 << 2)
476 #define NTB_B2BDOORBELL_BIT14 (1 << 3)
477 /* Software/configuration owns the top 16 bits. */
478 #define NTB_SPLIT_BAR (1ull << 16)
480 #define NTB_FEATURES_STR \
481 "\20\21SPLIT_BAR4\04B2B_DOORBELL_BIT14\03SB01BASE_LOCKUP" \
482 "\02SDOORBELL_LOCKUP\01BAR_SIZE_4K"
484 static struct ntb_hw_info pci_ids[] = {
485 /* XXX: PS/SS IDs left out until they are supported. */
486 { 0x0C4E8086, "BWD Atom Processor S1200 Non-Transparent Bridge B2B",
489 { 0x37258086, "JSF Xeon C35xx/C55xx Non-Transparent Bridge B2B",
490 NTB_XEON, NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 },
491 { 0x3C0D8086, "SNB Xeon E5/Core i7 Non-Transparent Bridge B2B",
492 NTB_XEON, NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 },
493 { 0x0E0D8086, "IVT Xeon E5 V2 Non-Transparent Bridge B2B", NTB_XEON,
494 NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 |
495 NTB_SB01BASE_LOCKUP | NTB_BAR_SIZE_4K },
496 { 0x2F0D8086, "HSX Xeon E5 V3 Non-Transparent Bridge B2B", NTB_XEON,
497 NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 |
498 NTB_SB01BASE_LOCKUP },
499 { 0x6F0D8086, "BDX Xeon E5 V4 Non-Transparent Bridge B2B", NTB_XEON,
500 NTB_SDOORBELL_LOCKUP | NTB_B2BDOORBELL_BIT14 |
501 NTB_SB01BASE_LOCKUP },
503 { 0x00000000, NULL, NTB_ATOM, 0 }
506 static const struct ntb_reg atom_reg = {
507 .ntb_ctl = ATOM_NTBCNTL_OFFSET,
508 .lnk_sta = ATOM_LINK_STATUS_OFFSET,
509 .db_size = sizeof(uint64_t),
510 .mw_bar = { NTB_B2B_BAR_1, NTB_B2B_BAR_2 },
513 static const struct ntb_alt_reg atom_pri_reg = {
514 .db_bell = ATOM_PDOORBELL_OFFSET,
515 .db_mask = ATOM_PDBMSK_OFFSET,
516 .spad = ATOM_SPAD_OFFSET,
519 static const struct ntb_alt_reg atom_b2b_reg = {
520 .db_bell = ATOM_B2B_DOORBELL_OFFSET,
521 .spad = ATOM_B2B_SPAD_OFFSET,
524 static const struct ntb_xlat_reg atom_sec_xlat = {
526 /* "FIXME" says the Linux driver. */
527 .bar0_base = ATOM_SBAR0BASE_OFFSET,
528 .bar2_base = ATOM_SBAR2BASE_OFFSET,
529 .bar4_base = ATOM_SBAR4BASE_OFFSET,
531 .bar2_limit = ATOM_SBAR2LMT_OFFSET,
532 .bar4_limit = ATOM_SBAR4LMT_OFFSET,
535 .bar2_xlat = ATOM_SBAR2XLAT_OFFSET,
536 .bar4_xlat = ATOM_SBAR4XLAT_OFFSET,
539 static const struct ntb_reg xeon_reg = {
540 .ntb_ctl = XEON_NTBCNTL_OFFSET,
541 .lnk_sta = XEON_LINK_STATUS_OFFSET,
542 .db_size = sizeof(uint16_t),
543 .mw_bar = { NTB_B2B_BAR_1, NTB_B2B_BAR_2, NTB_B2B_BAR_3 },
546 static const struct ntb_alt_reg xeon_pri_reg = {
547 .db_bell = XEON_PDOORBELL_OFFSET,
548 .db_mask = XEON_PDBMSK_OFFSET,
549 .spad = XEON_SPAD_OFFSET,
552 static const struct ntb_alt_reg xeon_b2b_reg = {
553 .db_bell = XEON_B2B_DOORBELL_OFFSET,
554 .spad = XEON_B2B_SPAD_OFFSET,
557 static const struct ntb_xlat_reg xeon_sec_xlat = {
558 .bar0_base = XEON_SBAR0BASE_OFFSET,
559 .bar2_base = XEON_SBAR2BASE_OFFSET,
560 .bar4_base = XEON_SBAR4BASE_OFFSET,
561 .bar5_base = XEON_SBAR5BASE_OFFSET,
563 .bar2_limit = XEON_SBAR2LMT_OFFSET,
564 .bar4_limit = XEON_SBAR4LMT_OFFSET,
565 .bar5_limit = XEON_SBAR5LMT_OFFSET,
567 .bar2_xlat = XEON_SBAR2XLAT_OFFSET,
568 .bar4_xlat = XEON_SBAR4XLAT_OFFSET,
569 .bar5_xlat = XEON_SBAR5XLAT_OFFSET,
572 static struct ntb_b2b_addr xeon_b2b_usd_addr = {
573 .bar0_addr = XEON_B2B_BAR0_ADDR,
574 .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
575 .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
576 .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
577 .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
580 static struct ntb_b2b_addr xeon_b2b_dsd_addr = {
581 .bar0_addr = XEON_B2B_BAR0_ADDR,
582 .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
583 .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
584 .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
585 .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
588 SYSCTL_NODE(_hw_ntb, OID_AUTO, xeon_b2b, CTLFLAG_RW, 0,
589 "B2B MW segment overrides -- MUST be the same on both sides");
591 TUNABLE_QUAD("hw.ntb.usd_bar2_addr64", &xeon_b2b_usd_addr.bar2_addr64);
592 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar2_addr64, CTLFLAG_RDTUN,
593 &xeon_b2b_usd_addr.bar2_addr64, 0, "If using B2B topology on Xeon "
594 "hardware, use this 64-bit address on the bus between the NTB devices for "
595 "the window at BAR2, on the upstream side of the link. MUST be the same "
596 "address on both sides.");
597 TUNABLE_QUAD("hw.ntb.usd_bar4_addr64", &xeon_b2b_usd_addr.bar4_addr64);
598 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar4_addr64, CTLFLAG_RDTUN,
599 &xeon_b2b_usd_addr.bar4_addr64, 0, "See usd_bar2_addr64, but BAR4.");
600 TUNABLE_QUAD("hw.ntb.usd_bar4_addr32", &xeon_b2b_usd_addr.bar4_addr32);
601 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar4_addr32, CTLFLAG_RDTUN,
602 &xeon_b2b_usd_addr.bar4_addr32, 0, "See usd_bar2_addr64, but BAR4 "
603 "(split-BAR mode).");
604 TUNABLE_QUAD("hw.ntb.usd_bar5_addr32", &xeon_b2b_usd_addr.bar5_addr32);
605 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, usd_bar5_addr32, CTLFLAG_RDTUN,
606 &xeon_b2b_usd_addr.bar5_addr32, 0, "See usd_bar2_addr64, but BAR5 "
607 "(split-BAR mode).");
609 TUNABLE_QUAD("hw.ntb.dsd_bar2_addr64", &xeon_b2b_dsd_addr.bar2_addr64);
610 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar2_addr64, CTLFLAG_RDTUN,
611 &xeon_b2b_dsd_addr.bar2_addr64, 0, "If using B2B topology on Xeon "
612 "hardware, use this 64-bit address on the bus between the NTB devices for "
613 "the window at BAR2, on the downstream side of the link. MUST be the same"
614 " address on both sides.");
615 TUNABLE_QUAD("hw.ntb.dsd_bar4_addr64", &xeon_b2b_dsd_addr.bar4_addr64);
616 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar4_addr64, CTLFLAG_RDTUN,
617 &xeon_b2b_dsd_addr.bar4_addr64, 0, "See dsd_bar2_addr64, but BAR4.");
618 TUNABLE_QUAD("hw.ntb.dsd_bar4_addr32", &xeon_b2b_dsd_addr.bar4_addr32);
619 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar4_addr32, CTLFLAG_RDTUN,
620 &xeon_b2b_dsd_addr.bar4_addr32, 0, "See dsd_bar2_addr64, but BAR4 "
621 "(split-BAR mode).");
622 TUNABLE_QUAD("hw.ntb.dsd_bar5_addr32", &xeon_b2b_dsd_addr.bar5_addr32);
623 SYSCTL_UQUAD(_hw_ntb_xeon_b2b, OID_AUTO, dsd_bar5_addr32, CTLFLAG_RDTUN,
624 &xeon_b2b_dsd_addr.bar5_addr32, 0, "See dsd_bar2_addr64, but BAR5 "
625 "(split-BAR mode).");
628 * OS <-> Driver interface structures
630 MALLOC_DEFINE(M_NTB, "ntb_hw", "ntb_hw driver memory allocations");
633 * OS <-> Driver linkage functions
636 intel_ntb_probe(device_t device)
638 struct ntb_hw_info *p;
640 p = intel_ntb_get_device_info(pci_get_devid(device));
644 device_set_desc(device, p->desc);
649 intel_ntb_attach(device_t device)
651 struct ntb_softc *ntb;
652 struct ntb_hw_info *p;
655 ntb = device_get_softc(device);
656 p = intel_ntb_get_device_info(pci_get_devid(device));
658 ntb->device = device;
660 ntb->features = p->features;
661 ntb->b2b_mw_idx = B2B_MW_DISABLED;
662 ntb->msix_mw_idx = B2B_MW_DISABLED;
664 /* Heartbeat timer for NTB_ATOM since there is no link interrupt */
665 callout_init(&ntb->heartbeat_timer, 1);
666 callout_init(&ntb->lr_timer, 1);
667 callout_init(&ntb->peer_msix_work, 1);
668 mtx_init(&ntb->db_mask_lock, "ntb hw bits", NULL, MTX_SPIN);
670 if (ntb->type == NTB_ATOM)
671 error = intel_ntb_detect_atom(ntb);
673 error = intel_ntb_detect_xeon(ntb);
677 intel_ntb_detect_max_mw(ntb);
679 pci_enable_busmaster(ntb->device);
681 error = intel_ntb_map_pci_bars(ntb);
684 if (ntb->type == NTB_ATOM)
685 error = intel_ntb_atom_init_dev(ntb);
687 error = intel_ntb_xeon_init_dev(ntb);
691 intel_ntb_spad_clear(device);
693 intel_ntb_poll_link(ntb);
695 intel_ntb_sysctl_init(ntb);
697 /* Attach children to this controller */
698 error = ntb_register_device(device);
702 intel_ntb_detach(device);
707 intel_ntb_detach(device_t device)
709 struct ntb_softc *ntb;
711 ntb = device_get_softc(device);
713 /* Detach & delete all children */
714 ntb_unregister_device(device);
716 if (ntb->self_reg != NULL) {
718 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_valid_mask);
721 callout_drain(&ntb->heartbeat_timer);
722 callout_drain(&ntb->lr_timer);
723 callout_drain(&ntb->peer_msix_work);
724 pci_disable_busmaster(ntb->device);
725 if (ntb->type == NTB_XEON)
726 intel_ntb_teardown_xeon(ntb);
727 intel_ntb_teardown_interrupts(ntb);
729 mtx_destroy(&ntb->db_mask_lock);
731 intel_ntb_unmap_pci_bar(ntb);
737 * Driver internal routines
739 static inline enum ntb_bar
740 intel_ntb_mw_to_bar(struct ntb_softc *ntb, unsigned mw)
743 KASSERT(mw < ntb->mw_count,
744 ("%s: mw:%u > count:%u", __func__, mw, (unsigned)ntb->mw_count));
745 KASSERT(ntb->reg->mw_bar[mw] != 0, ("invalid mw"));
747 return (ntb->reg->mw_bar[mw]);
751 bar_is_64bit(struct ntb_softc *ntb, enum ntb_bar bar)
753 /* XXX This assertion could be stronger. */
754 KASSERT(bar < NTB_MAX_BARS, ("bogus bar"));
755 return (bar < NTB_B2B_BAR_2 || !HAS_FEATURE(ntb, NTB_SPLIT_BAR));
759 bar_get_xlat_params(struct ntb_softc *ntb, enum ntb_bar bar, uint32_t *base,
760 uint32_t *xlat, uint32_t *lmt)
762 uint32_t basev, lmtv, xlatv;
766 basev = ntb->xlat_reg->bar2_base;
767 lmtv = ntb->xlat_reg->bar2_limit;
768 xlatv = ntb->xlat_reg->bar2_xlat;
771 basev = ntb->xlat_reg->bar4_base;
772 lmtv = ntb->xlat_reg->bar4_limit;
773 xlatv = ntb->xlat_reg->bar4_xlat;
776 basev = ntb->xlat_reg->bar5_base;
777 lmtv = ntb->xlat_reg->bar5_limit;
778 xlatv = ntb->xlat_reg->bar5_xlat;
781 KASSERT(bar >= NTB_B2B_BAR_1 && bar < NTB_MAX_BARS,
783 basev = lmtv = xlatv = 0;
796 intel_ntb_map_pci_bars(struct ntb_softc *ntb)
800 ntb->bar_info[NTB_CONFIG_BAR].pci_resource_id = PCIR_BAR(0);
801 rc = map_mmr_bar(ntb, &ntb->bar_info[NTB_CONFIG_BAR]);
805 ntb->bar_info[NTB_B2B_BAR_1].pci_resource_id = PCIR_BAR(2);
806 rc = map_memory_window_bar(ntb, &ntb->bar_info[NTB_B2B_BAR_1]);
809 ntb->bar_info[NTB_B2B_BAR_1].psz_off = XEON_PBAR23SZ_OFFSET;
810 ntb->bar_info[NTB_B2B_BAR_1].ssz_off = XEON_SBAR23SZ_OFFSET;
811 ntb->bar_info[NTB_B2B_BAR_1].pbarxlat_off = XEON_PBAR2XLAT_OFFSET;
813 ntb->bar_info[NTB_B2B_BAR_2].pci_resource_id = PCIR_BAR(4);
814 rc = map_memory_window_bar(ntb, &ntb->bar_info[NTB_B2B_BAR_2]);
817 ntb->bar_info[NTB_B2B_BAR_2].psz_off = XEON_PBAR4SZ_OFFSET;
818 ntb->bar_info[NTB_B2B_BAR_2].ssz_off = XEON_SBAR4SZ_OFFSET;
819 ntb->bar_info[NTB_B2B_BAR_2].pbarxlat_off = XEON_PBAR4XLAT_OFFSET;
821 if (!HAS_FEATURE(ntb, NTB_SPLIT_BAR))
824 ntb->bar_info[NTB_B2B_BAR_3].pci_resource_id = PCIR_BAR(5);
825 rc = map_memory_window_bar(ntb, &ntb->bar_info[NTB_B2B_BAR_3]);
826 ntb->bar_info[NTB_B2B_BAR_3].psz_off = XEON_PBAR5SZ_OFFSET;
827 ntb->bar_info[NTB_B2B_BAR_3].ssz_off = XEON_SBAR5SZ_OFFSET;
828 ntb->bar_info[NTB_B2B_BAR_3].pbarxlat_off = XEON_PBAR5XLAT_OFFSET;
832 device_printf(ntb->device,
833 "unable to allocate pci resource\n");
838 print_map_success(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar,
842 device_printf(ntb->device,
843 "Mapped BAR%d v:[%p-%p] p:[%p-%p] (0x%jx bytes) (%s)\n",
844 PCI_RID2BAR(bar->pci_resource_id), bar->vbase,
845 (char *)bar->vbase + bar->size - 1,
846 (void *)bar->pbase, (void *)(bar->pbase + bar->size - 1),
847 (uintmax_t)bar->size, kind);
851 map_mmr_bar(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar)
854 bar->pci_resource = bus_alloc_resource_any(ntb->device, SYS_RES_MEMORY,
855 &bar->pci_resource_id, RF_ACTIVE);
856 if (bar->pci_resource == NULL)
859 save_bar_parameters(bar);
860 bar->map_mode = VM_MEMATTR_UNCACHEABLE;
861 print_map_success(ntb, bar, "mmr");
866 map_memory_window_bar(struct ntb_softc *ntb, struct ntb_pci_bar_info *bar)
869 vm_memattr_t mapmode;
870 uint8_t bar_size_bits = 0;
872 bar->pci_resource = bus_alloc_resource_any(ntb->device, SYS_RES_MEMORY,
873 &bar->pci_resource_id, RF_ACTIVE);
875 if (bar->pci_resource == NULL)
878 save_bar_parameters(bar);
880 * Ivytown NTB BAR sizes are misreported by the hardware due to a
881 * hardware issue. To work around this, query the size it should be
882 * configured to by the device and modify the resource to correspond to
883 * this new size. The BIOS on systems with this problem is required to
884 * provide enough address space to allow the driver to make this change
887 * Ideally I could have just specified the size when I allocated the
889 * bus_alloc_resource(ntb->device,
890 * SYS_RES_MEMORY, &bar->pci_resource_id, 0ul, ~0ul,
891 * 1ul << bar_size_bits, RF_ACTIVE);
892 * but the PCI driver does not honor the size in this call, so we have
893 * to modify it after the fact.
895 if (HAS_FEATURE(ntb, NTB_BAR_SIZE_4K)) {
896 if (bar->pci_resource_id == PCIR_BAR(2))
897 bar_size_bits = pci_read_config(ntb->device,
898 XEON_PBAR23SZ_OFFSET, 1);
900 bar_size_bits = pci_read_config(ntb->device,
901 XEON_PBAR45SZ_OFFSET, 1);
903 rc = bus_adjust_resource(ntb->device, SYS_RES_MEMORY,
904 bar->pci_resource, bar->pbase,
905 bar->pbase + (1ul << bar_size_bits) - 1);
907 device_printf(ntb->device,
908 "unable to resize bar\n");
912 save_bar_parameters(bar);
915 bar->map_mode = VM_MEMATTR_UNCACHEABLE;
916 print_map_success(ntb, bar, "mw");
919 * Optionally, mark MW BARs as anything other than UC to improve
922 mapmode = intel_ntb_pat_flags();
923 if (mapmode == bar->map_mode)
926 rc = pmap_change_attr((vm_offset_t)bar->vbase, bar->size, mapmode);
928 bar->map_mode = mapmode;
929 device_printf(ntb->device,
930 "Marked BAR%d v:[%p-%p] p:[%p-%p] as "
932 PCI_RID2BAR(bar->pci_resource_id), bar->vbase,
933 (char *)bar->vbase + bar->size - 1,
934 (void *)bar->pbase, (void *)(bar->pbase + bar->size - 1),
935 intel_ntb_vm_memattr_to_str(mapmode));
937 device_printf(ntb->device,
938 "Unable to mark BAR%d v:[%p-%p] p:[%p-%p] as "
940 PCI_RID2BAR(bar->pci_resource_id), bar->vbase,
941 (char *)bar->vbase + bar->size - 1,
942 (void *)bar->pbase, (void *)(bar->pbase + bar->size - 1),
943 intel_ntb_vm_memattr_to_str(mapmode), rc);
949 intel_ntb_unmap_pci_bar(struct ntb_softc *ntb)
951 struct ntb_pci_bar_info *current_bar;
954 for (i = 0; i < NTB_MAX_BARS; i++) {
955 current_bar = &ntb->bar_info[i];
956 if (current_bar->pci_resource != NULL)
957 bus_release_resource(ntb->device, SYS_RES_MEMORY,
958 current_bar->pci_resource_id,
959 current_bar->pci_resource);
964 intel_ntb_setup_msix(struct ntb_softc *ntb, uint32_t num_vectors)
969 for (i = 0; i < num_vectors; i++) {
970 ntb->int_info[i].rid = i + 1;
971 ntb->int_info[i].res = bus_alloc_resource_any(ntb->device,
972 SYS_RES_IRQ, &ntb->int_info[i].rid, RF_ACTIVE);
973 if (ntb->int_info[i].res == NULL) {
974 device_printf(ntb->device,
975 "bus_alloc_resource failed\n");
978 ntb->int_info[i].tag = NULL;
979 ntb->allocated_interrupts++;
980 rc = bus_setup_intr(ntb->device, ntb->int_info[i].res,
981 INTR_MPSAFE | INTR_TYPE_MISC, NULL, ndev_vec_isr,
982 &ntb->msix_vec[i], &ntb->int_info[i].tag);
984 device_printf(ntb->device, "bus_setup_intr failed\n");
992 * The Linux NTB driver drops from MSI-X to legacy INTx if a unique vector
993 * cannot be allocated for each MSI-X message. JHB seems to think remapping
994 * should be okay. This tunable should enable us to test that hypothesis
995 * when someone gets their hands on some Xeon hardware.
997 static int ntb_force_remap_mode;
998 TUNABLE_INT("hw.ntb.force_remap_mode", &ntb_force_remap_mode);
999 SYSCTL_INT(_hw_ntb, OID_AUTO, force_remap_mode, CTLFLAG_RDTUN,
1000 &ntb_force_remap_mode, 0, "If enabled, force MSI-X messages to be remapped"
1001 " to a smaller number of ithreads, even if the desired number are "
1005 * In case it is NOT ok, give consumers an abort button.
1007 static int ntb_prefer_intx;
1008 TUNABLE_INT("hw.ntb.prefer_intx_to_remap", &ntb_prefer_intx);
1009 SYSCTL_INT(_hw_ntb, OID_AUTO, prefer_intx_to_remap, CTLFLAG_RDTUN,
1010 &ntb_prefer_intx, 0, "If enabled, prefer to use legacy INTx mode rather "
1011 "than remapping MSI-X messages over available slots (match Linux driver "
1015 * Remap the desired number of MSI-X messages to available ithreads in a simple
1016 * round-robin fashion.
1019 intel_ntb_remap_msix(device_t dev, uint32_t desired, uint32_t avail)
1025 if (ntb_prefer_intx != 0)
1028 vectors = malloc(desired * sizeof(*vectors), M_NTB, M_ZERO | M_WAITOK);
1030 for (i = 0; i < desired; i++)
1031 vectors[i] = (i % avail) + 1;
1033 rc = pci_remap_msix(dev, desired, vectors);
1034 free(vectors, M_NTB);
1039 intel_ntb_init_isr(struct ntb_softc *ntb)
1041 uint32_t desired_vectors, num_vectors;
1044 ntb->allocated_interrupts = 0;
1045 ntb->last_ts = ticks;
1048 * Mask all doorbell interrupts. (Except link events!)
1051 ntb->db_mask = ntb->db_valid_mask;
1052 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1053 DB_MASK_UNLOCK(ntb);
1055 num_vectors = desired_vectors = MIN(pci_msix_count(ntb->device),
1057 if (desired_vectors >= 1) {
1058 rc = pci_alloc_msix(ntb->device, &num_vectors);
1060 if (ntb_force_remap_mode != 0 && rc == 0 &&
1061 num_vectors == desired_vectors)
1064 if (rc == 0 && num_vectors < desired_vectors) {
1065 rc = intel_ntb_remap_msix(ntb->device, desired_vectors,
1068 num_vectors = desired_vectors;
1070 pci_release_msi(ntb->device);
1077 if (ntb->type == NTB_XEON && num_vectors < ntb->db_vec_count) {
1078 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1079 device_printf(ntb->device,
1080 "Errata workaround does not support MSI or INTX\n");
1084 ntb->db_vec_count = 1;
1085 ntb->db_vec_shift = XEON_DB_TOTAL_SHIFT;
1086 rc = intel_ntb_setup_legacy_interrupt(ntb);
1088 if (num_vectors - 1 != XEON_NONLINK_DB_MSIX_BITS &&
1089 HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1090 device_printf(ntb->device,
1091 "Errata workaround expects %d doorbell bits\n",
1092 XEON_NONLINK_DB_MSIX_BITS);
1096 intel_ntb_create_msix_vec(ntb, num_vectors);
1097 rc = intel_ntb_setup_msix(ntb, num_vectors);
1100 device_printf(ntb->device,
1101 "Error allocating interrupts: %d\n", rc);
1102 intel_ntb_free_msix_vec(ntb);
1109 intel_ntb_setup_legacy_interrupt(struct ntb_softc *ntb)
1113 ntb->int_info[0].rid = 0;
1114 ntb->int_info[0].res = bus_alloc_resource_any(ntb->device, SYS_RES_IRQ,
1115 &ntb->int_info[0].rid, RF_SHAREABLE|RF_ACTIVE);
1116 if (ntb->int_info[0].res == NULL) {
1117 device_printf(ntb->device, "bus_alloc_resource failed\n");
1121 ntb->int_info[0].tag = NULL;
1122 ntb->allocated_interrupts = 1;
1124 rc = bus_setup_intr(ntb->device, ntb->int_info[0].res,
1125 INTR_MPSAFE | INTR_TYPE_MISC, NULL, ndev_irq_isr,
1126 ntb, &ntb->int_info[0].tag);
1128 device_printf(ntb->device, "bus_setup_intr failed\n");
1136 intel_ntb_teardown_interrupts(struct ntb_softc *ntb)
1138 struct ntb_int_info *current_int;
1141 for (i = 0; i < ntb->allocated_interrupts; i++) {
1142 current_int = &ntb->int_info[i];
1143 if (current_int->tag != NULL)
1144 bus_teardown_intr(ntb->device, current_int->res,
1147 if (current_int->res != NULL)
1148 bus_release_resource(ntb->device, SYS_RES_IRQ,
1149 rman_get_rid(current_int->res), current_int->res);
1152 intel_ntb_free_msix_vec(ntb);
1153 pci_release_msi(ntb->device);
1157 * Doorbell register and mask are 64-bit on Atom, 16-bit on Xeon. Abstract it
1158 * out to make code clearer.
1160 static inline uint64_t
1161 db_ioread(struct ntb_softc *ntb, uint64_t regoff)
1164 if (ntb->type == NTB_ATOM)
1165 return (intel_ntb_reg_read(8, regoff));
1167 KASSERT(ntb->type == NTB_XEON, ("bad ntb type"));
1169 return (intel_ntb_reg_read(2, regoff));
1173 db_iowrite(struct ntb_softc *ntb, uint64_t regoff, uint64_t val)
1176 KASSERT((val & ~ntb->db_valid_mask) == 0,
1177 ("%s: Invalid bits 0x%jx (valid: 0x%jx)", __func__,
1178 (uintmax_t)(val & ~ntb->db_valid_mask),
1179 (uintmax_t)ntb->db_valid_mask));
1181 if (regoff == ntb->self_reg->db_mask)
1182 DB_MASK_ASSERT(ntb, MA_OWNED);
1183 db_iowrite_raw(ntb, regoff, val);
1187 db_iowrite_raw(struct ntb_softc *ntb, uint64_t regoff, uint64_t val)
1190 if (ntb->type == NTB_ATOM) {
1191 intel_ntb_reg_write(8, regoff, val);
1195 KASSERT(ntb->type == NTB_XEON, ("bad ntb type"));
1196 intel_ntb_reg_write(2, regoff, (uint16_t)val);
1200 intel_ntb_db_set_mask(device_t dev, uint64_t bits)
1202 struct ntb_softc *ntb = device_get_softc(dev);
1205 ntb->db_mask |= bits;
1206 if (!HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP))
1207 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1208 DB_MASK_UNLOCK(ntb);
1212 intel_ntb_db_clear_mask(device_t dev, uint64_t bits)
1214 struct ntb_softc *ntb = device_get_softc(dev);
1218 KASSERT((bits & ~ntb->db_valid_mask) == 0,
1219 ("%s: Invalid bits 0x%jx (valid: 0x%jx)", __func__,
1220 (uintmax_t)(bits & ~ntb->db_valid_mask),
1221 (uintmax_t)ntb->db_valid_mask));
1224 ibits = ntb->fake_db_bell & ntb->db_mask & bits;
1225 ntb->db_mask &= ~bits;
1226 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1227 /* Simulate fake interrupts if unmasked DB bits are set. */
1228 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
1229 if ((ibits & intel_ntb_db_vector_mask(dev, i)) != 0)
1230 swi_sched(ntb->int_info[i].tag, 0);
1233 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1235 DB_MASK_UNLOCK(ntb);
1239 intel_ntb_db_read(device_t dev)
1241 struct ntb_softc *ntb = device_get_softc(dev);
1243 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP))
1244 return (ntb->fake_db_bell);
1246 return (db_ioread(ntb, ntb->self_reg->db_bell));
1250 intel_ntb_db_clear(device_t dev, uint64_t bits)
1252 struct ntb_softc *ntb = device_get_softc(dev);
1254 KASSERT((bits & ~ntb->db_valid_mask) == 0,
1255 ("%s: Invalid bits 0x%jx (valid: 0x%jx)", __func__,
1256 (uintmax_t)(bits & ~ntb->db_valid_mask),
1257 (uintmax_t)ntb->db_valid_mask));
1259 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1261 ntb->fake_db_bell &= ~bits;
1262 DB_MASK_UNLOCK(ntb);
1266 db_iowrite(ntb, ntb->self_reg->db_bell, bits);
1269 static inline uint64_t
1270 intel_ntb_vec_mask(struct ntb_softc *ntb, uint64_t db_vector)
1272 uint64_t shift, mask;
1274 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1276 * Remap vectors in custom way to make at least first
1277 * three doorbells to not generate stray events.
1278 * This breaks Linux compatibility (if one existed)
1279 * when more then one DB is used (not by if_ntb).
1281 if (db_vector < XEON_NONLINK_DB_MSIX_BITS - 1)
1282 return (1 << db_vector);
1283 if (db_vector == XEON_NONLINK_DB_MSIX_BITS - 1)
1287 shift = ntb->db_vec_shift;
1288 mask = (1ull << shift) - 1;
1289 return (mask << (shift * db_vector));
1293 intel_ntb_interrupt(struct ntb_softc *ntb, uint32_t vec)
1297 ntb->last_ts = ticks;
1298 vec_mask = intel_ntb_vec_mask(ntb, vec);
1300 if ((vec_mask & ntb->db_link_mask) != 0) {
1301 if (intel_ntb_poll_link(ntb))
1302 ntb_link_event(ntb->device);
1305 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP) &&
1306 (vec_mask & ntb->db_link_mask) == 0) {
1309 /* Do not report same DB events again if not cleared yet. */
1310 vec_mask &= ~ntb->fake_db_bell;
1312 /* Update our internal doorbell register. */
1313 ntb->fake_db_bell |= vec_mask;
1315 /* Do not report masked DB events. */
1316 vec_mask &= ~ntb->db_mask;
1318 DB_MASK_UNLOCK(ntb);
1321 if ((vec_mask & ntb->db_valid_mask) != 0)
1322 ntb_db_event(ntb->device, vec);
1326 ndev_vec_isr(void *arg)
1328 struct ntb_vec *nvec = arg;
1330 intel_ntb_interrupt(nvec->ntb, nvec->num);
1334 ndev_irq_isr(void *arg)
1336 /* If we couldn't set up MSI-X, we only have the one vector. */
1337 intel_ntb_interrupt(arg, 0);
1341 intel_ntb_create_msix_vec(struct ntb_softc *ntb, uint32_t num_vectors)
1345 ntb->msix_vec = malloc(num_vectors * sizeof(*ntb->msix_vec), M_NTB,
1347 for (i = 0; i < num_vectors; i++) {
1348 ntb->msix_vec[i].num = i;
1349 ntb->msix_vec[i].ntb = ntb;
1356 intel_ntb_free_msix_vec(struct ntb_softc *ntb)
1359 if (ntb->msix_vec == NULL)
1362 free(ntb->msix_vec, M_NTB);
1363 ntb->msix_vec = NULL;
1367 intel_ntb_get_msix_info(struct ntb_softc *ntb)
1369 struct pci_devinfo *dinfo;
1370 struct pcicfg_msix *msix;
1371 uint32_t laddr, data, i, offset;
1373 dinfo = device_get_ivars(ntb->device);
1374 msix = &dinfo->cfg.msix;
1376 CTASSERT(XEON_NONLINK_DB_MSIX_BITS == nitems(ntb->msix_data));
1378 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
1379 offset = msix->msix_table_offset + i * PCI_MSIX_ENTRY_SIZE;
1381 laddr = bus_read_4(msix->msix_table_res, offset +
1382 PCI_MSIX_ENTRY_LOWER_ADDR);
1383 intel_ntb_printf(2, "local MSIX addr(%u): 0x%x\n", i, laddr);
1385 KASSERT((laddr & MSI_INTEL_ADDR_BASE) == MSI_INTEL_ADDR_BASE,
1386 ("local MSIX addr 0x%x not in MSI base 0x%x", laddr,
1387 MSI_INTEL_ADDR_BASE));
1388 ntb->msix_data[i].nmd_ofs = laddr;
1390 data = bus_read_4(msix->msix_table_res, offset +
1391 PCI_MSIX_ENTRY_DATA);
1392 intel_ntb_printf(2, "local MSIX data(%u): 0x%x\n", i, data);
1394 ntb->msix_data[i].nmd_data = data;
1398 static struct ntb_hw_info *
1399 intel_ntb_get_device_info(uint32_t device_id)
1401 struct ntb_hw_info *ep = pci_ids;
1403 while (ep->device_id) {
1404 if (ep->device_id == device_id)
1412 intel_ntb_teardown_xeon(struct ntb_softc *ntb)
1415 if (ntb->reg != NULL)
1416 intel_ntb_link_disable(ntb->device);
1420 intel_ntb_detect_max_mw(struct ntb_softc *ntb)
1423 if (ntb->type == NTB_ATOM) {
1424 ntb->mw_count = ATOM_MW_COUNT;
1428 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR))
1429 ntb->mw_count = XEON_HSX_SPLIT_MW_COUNT;
1431 ntb->mw_count = XEON_SNB_MW_COUNT;
1435 intel_ntb_detect_xeon(struct ntb_softc *ntb)
1437 uint8_t ppd, conn_type;
1439 ppd = pci_read_config(ntb->device, NTB_PPD_OFFSET, 1);
1442 if ((ppd & XEON_PPD_DEV_TYPE) != 0)
1443 ntb->dev_type = NTB_DEV_DSD;
1445 ntb->dev_type = NTB_DEV_USD;
1447 if ((ppd & XEON_PPD_SPLIT_BAR) != 0)
1448 ntb->features |= NTB_SPLIT_BAR;
1450 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP) &&
1451 !HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
1452 device_printf(ntb->device,
1453 "Can not apply SB01BASE_LOCKUP workaround "
1454 "with split BARs disabled!\n");
1455 device_printf(ntb->device,
1456 "Expect system hangs under heavy NTB traffic!\n");
1457 ntb->features &= ~NTB_SB01BASE_LOCKUP;
1461 * SDOORBELL errata workaround gets in the way of SB01BASE_LOCKUP
1462 * errata workaround; only do one at a time.
1464 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP))
1465 ntb->features &= ~NTB_SDOORBELL_LOCKUP;
1467 conn_type = ppd & XEON_PPD_CONN_TYPE;
1468 switch (conn_type) {
1470 ntb->conn_type = conn_type;
1473 case NTB_CONN_TRANSPARENT:
1475 device_printf(ntb->device, "Unsupported connection type: %u\n",
1476 (unsigned)conn_type);
1483 intel_ntb_detect_atom(struct ntb_softc *ntb)
1485 uint32_t ppd, conn_type;
1487 ppd = pci_read_config(ntb->device, NTB_PPD_OFFSET, 4);
1490 if ((ppd & ATOM_PPD_DEV_TYPE) != 0)
1491 ntb->dev_type = NTB_DEV_DSD;
1493 ntb->dev_type = NTB_DEV_USD;
1495 conn_type = (ppd & ATOM_PPD_CONN_TYPE) >> 8;
1496 switch (conn_type) {
1498 ntb->conn_type = conn_type;
1501 device_printf(ntb->device, "Unsupported NTB configuration\n");
1508 intel_ntb_xeon_init_dev(struct ntb_softc *ntb)
1512 ntb->spad_count = XEON_SPAD_COUNT;
1513 ntb->db_count = XEON_DB_COUNT;
1514 ntb->db_link_mask = XEON_DB_LINK_BIT;
1515 ntb->db_vec_count = XEON_DB_MSIX_VECTOR_COUNT;
1516 ntb->db_vec_shift = XEON_DB_MSIX_VECTOR_SHIFT;
1518 if (ntb->conn_type != NTB_CONN_B2B) {
1519 device_printf(ntb->device, "Connection type %d not supported\n",
1524 ntb->reg = &xeon_reg;
1525 ntb->self_reg = &xeon_pri_reg;
1526 ntb->peer_reg = &xeon_b2b_reg;
1527 ntb->xlat_reg = &xeon_sec_xlat;
1529 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1530 ntb->fake_db_bell = 0;
1531 ntb->msix_mw_idx = (ntb->mw_count + g_ntb_msix_idx) %
1533 intel_ntb_printf(2, "Setting up MSIX mw idx %d means %u\n",
1534 g_ntb_msix_idx, ntb->msix_mw_idx);
1535 rc = intel_ntb_mw_set_wc_internal(ntb, ntb->msix_mw_idx,
1536 VM_MEMATTR_UNCACHEABLE);
1537 KASSERT(rc == 0, ("shouldn't fail"));
1538 } else if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP)) {
1540 * There is a Xeon hardware errata related to writes to SDOORBELL or
1541 * B2BDOORBELL in conjunction with inbound access to NTB MMIO space,
1542 * which may hang the system. To workaround this, use a memory
1543 * window to access the interrupt and scratch pad registers on the
1546 ntb->b2b_mw_idx = (ntb->mw_count + g_ntb_mw_idx) %
1548 intel_ntb_printf(2, "Setting up b2b mw idx %d means %u\n",
1549 g_ntb_mw_idx, ntb->b2b_mw_idx);
1550 rc = intel_ntb_mw_set_wc_internal(ntb, ntb->b2b_mw_idx,
1551 VM_MEMATTR_UNCACHEABLE);
1552 KASSERT(rc == 0, ("shouldn't fail"));
1553 } else if (HAS_FEATURE(ntb, NTB_B2BDOORBELL_BIT14))
1555 * HW Errata on bit 14 of b2bdoorbell register. Writes will not be
1556 * mirrored to the remote system. Shrink the number of bits by one,
1557 * since bit 14 is the last bit.
1559 * On REGS_THRU_MW errata mode, we don't use the b2bdoorbell register
1560 * anyway. Nor for non-B2B connection types.
1562 ntb->db_count = XEON_DB_COUNT - 1;
1564 ntb->db_valid_mask = (1ull << ntb->db_count) - 1;
1566 if (ntb->dev_type == NTB_DEV_USD)
1567 rc = xeon_setup_b2b_mw(ntb, &xeon_b2b_dsd_addr,
1568 &xeon_b2b_usd_addr);
1570 rc = xeon_setup_b2b_mw(ntb, &xeon_b2b_usd_addr,
1571 &xeon_b2b_dsd_addr);
1575 /* Enable Bus Master and Memory Space on the secondary side */
1576 intel_ntb_reg_write(2, XEON_SPCICMD_OFFSET,
1577 PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
1580 * Mask all doorbell interrupts.
1583 ntb->db_mask = ntb->db_valid_mask;
1584 db_iowrite(ntb, ntb->self_reg->db_mask, ntb->db_mask);
1585 DB_MASK_UNLOCK(ntb);
1587 rc = intel_ntb_init_isr(ntb);
1592 intel_ntb_atom_init_dev(struct ntb_softc *ntb)
1596 KASSERT(ntb->conn_type == NTB_CONN_B2B,
1597 ("Unsupported NTB configuration (%d)\n", ntb->conn_type));
1599 ntb->spad_count = ATOM_SPAD_COUNT;
1600 ntb->db_count = ATOM_DB_COUNT;
1601 ntb->db_vec_count = ATOM_DB_MSIX_VECTOR_COUNT;
1602 ntb->db_vec_shift = ATOM_DB_MSIX_VECTOR_SHIFT;
1603 ntb->db_valid_mask = (1ull << ntb->db_count) - 1;
1605 ntb->reg = &atom_reg;
1606 ntb->self_reg = &atom_pri_reg;
1607 ntb->peer_reg = &atom_b2b_reg;
1608 ntb->xlat_reg = &atom_sec_xlat;
1611 * FIXME - MSI-X bug on early Atom HW, remove once internal issue is
1612 * resolved. Mask transaction layer internal parity errors.
1614 pci_write_config(ntb->device, 0xFC, 0x4, 4);
1616 configure_atom_secondary_side_bars(ntb);
1618 /* Enable Bus Master and Memory Space on the secondary side */
1619 intel_ntb_reg_write(2, ATOM_SPCICMD_OFFSET,
1620 PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
1622 error = intel_ntb_init_isr(ntb);
1626 /* Initiate PCI-E link training */
1627 intel_ntb_link_enable(ntb->device, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
1629 callout_reset(&ntb->heartbeat_timer, 0, atom_link_hb, ntb);
1634 /* XXX: Linux driver doesn't seem to do any of this for Atom. */
1636 configure_atom_secondary_side_bars(struct ntb_softc *ntb)
1639 if (ntb->dev_type == NTB_DEV_USD) {
1640 intel_ntb_reg_write(8, ATOM_PBAR2XLAT_OFFSET,
1641 XEON_B2B_BAR2_ADDR64);
1642 intel_ntb_reg_write(8, ATOM_PBAR4XLAT_OFFSET,
1643 XEON_B2B_BAR4_ADDR64);
1644 intel_ntb_reg_write(8, ATOM_MBAR23_OFFSET, XEON_B2B_BAR2_ADDR64);
1645 intel_ntb_reg_write(8, ATOM_MBAR45_OFFSET, XEON_B2B_BAR4_ADDR64);
1647 intel_ntb_reg_write(8, ATOM_PBAR2XLAT_OFFSET,
1648 XEON_B2B_BAR2_ADDR64);
1649 intel_ntb_reg_write(8, ATOM_PBAR4XLAT_OFFSET,
1650 XEON_B2B_BAR4_ADDR64);
1651 intel_ntb_reg_write(8, ATOM_MBAR23_OFFSET, XEON_B2B_BAR2_ADDR64);
1652 intel_ntb_reg_write(8, ATOM_MBAR45_OFFSET, XEON_B2B_BAR4_ADDR64);
1658 * When working around Xeon SDOORBELL errata by remapping remote registers in a
1659 * MW, limit the B2B MW to half a MW. By sharing a MW, half the shared MW
1660 * remains for use by a higher layer.
1662 * Will only be used if working around SDOORBELL errata and the BIOS-configured
1663 * MW size is sufficiently large.
1665 static unsigned int ntb_b2b_mw_share;
1666 TUNABLE_INT("hw.ntb.b2b_mw_share", &ntb_b2b_mw_share);
1667 SYSCTL_UINT(_hw_ntb, OID_AUTO, b2b_mw_share, CTLFLAG_RDTUN, &ntb_b2b_mw_share,
1668 0, "If enabled (non-zero), prefer to share half of the B2B peer register "
1669 "MW with higher level consumers. Both sides of the NTB MUST set the same "
1673 xeon_reset_sbar_size(struct ntb_softc *ntb, enum ntb_bar idx,
1674 enum ntb_bar regbar)
1676 struct ntb_pci_bar_info *bar;
1679 if (!HAS_FEATURE(ntb, NTB_SPLIT_BAR) && idx >= NTB_B2B_BAR_3)
1682 bar = &ntb->bar_info[idx];
1683 bar_sz = pci_read_config(ntb->device, bar->psz_off, 1);
1684 if (idx == regbar) {
1685 if (ntb->b2b_off != 0)
1690 pci_write_config(ntb->device, bar->ssz_off, bar_sz, 1);
1691 bar_sz = pci_read_config(ntb->device, bar->ssz_off, 1);
1696 xeon_set_sbar_base_and_limit(struct ntb_softc *ntb, uint64_t bar_addr,
1697 enum ntb_bar idx, enum ntb_bar regbar)
1700 uint32_t base_reg, lmt_reg;
1702 bar_get_xlat_params(ntb, idx, &base_reg, NULL, &lmt_reg);
1703 if (idx == regbar) {
1705 bar_addr += ntb->b2b_off;
1710 if (!bar_is_64bit(ntb, idx)) {
1711 intel_ntb_reg_write(4, base_reg, bar_addr);
1712 reg_val = intel_ntb_reg_read(4, base_reg);
1715 intel_ntb_reg_write(4, lmt_reg, bar_addr);
1716 reg_val = intel_ntb_reg_read(4, lmt_reg);
1719 intel_ntb_reg_write(8, base_reg, bar_addr);
1720 reg_val = intel_ntb_reg_read(8, base_reg);
1723 intel_ntb_reg_write(8, lmt_reg, bar_addr);
1724 reg_val = intel_ntb_reg_read(8, lmt_reg);
1730 xeon_set_pbar_xlat(struct ntb_softc *ntb, uint64_t base_addr, enum ntb_bar idx)
1732 struct ntb_pci_bar_info *bar;
1734 bar = &ntb->bar_info[idx];
1735 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR) && idx >= NTB_B2B_BAR_2) {
1736 intel_ntb_reg_write(4, bar->pbarxlat_off, base_addr);
1737 base_addr = intel_ntb_reg_read(4, bar->pbarxlat_off);
1739 intel_ntb_reg_write(8, bar->pbarxlat_off, base_addr);
1740 base_addr = intel_ntb_reg_read(8, bar->pbarxlat_off);
1746 xeon_setup_b2b_mw(struct ntb_softc *ntb, const struct ntb_b2b_addr *addr,
1747 const struct ntb_b2b_addr *peer_addr)
1749 struct ntb_pci_bar_info *b2b_bar;
1752 enum ntb_bar b2b_bar_num, i;
1754 if (ntb->b2b_mw_idx == B2B_MW_DISABLED) {
1756 b2b_bar_num = NTB_CONFIG_BAR;
1759 b2b_bar_num = intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx);
1760 KASSERT(b2b_bar_num > 0 && b2b_bar_num < NTB_MAX_BARS,
1761 ("invalid b2b mw bar"));
1763 b2b_bar = &ntb->bar_info[b2b_bar_num];
1764 bar_size = b2b_bar->size;
1766 if (ntb_b2b_mw_share != 0 &&
1767 (bar_size >> 1) >= XEON_B2B_MIN_SIZE)
1768 ntb->b2b_off = bar_size >> 1;
1769 else if (bar_size >= XEON_B2B_MIN_SIZE) {
1772 device_printf(ntb->device,
1773 "B2B bar size is too small!\n");
1779 * Reset the secondary bar sizes to match the primary bar sizes.
1780 * (Except, disable or halve the size of the B2B secondary bar.)
1782 for (i = NTB_B2B_BAR_1; i < NTB_MAX_BARS; i++)
1783 xeon_reset_sbar_size(ntb, i, b2b_bar_num);
1786 if (b2b_bar_num == NTB_CONFIG_BAR)
1787 bar_addr = addr->bar0_addr;
1788 else if (b2b_bar_num == NTB_B2B_BAR_1)
1789 bar_addr = addr->bar2_addr64;
1790 else if (b2b_bar_num == NTB_B2B_BAR_2 && !HAS_FEATURE(ntb, NTB_SPLIT_BAR))
1791 bar_addr = addr->bar4_addr64;
1792 else if (b2b_bar_num == NTB_B2B_BAR_2)
1793 bar_addr = addr->bar4_addr32;
1794 else if (b2b_bar_num == NTB_B2B_BAR_3)
1795 bar_addr = addr->bar5_addr32;
1797 KASSERT(false, ("invalid bar"));
1799 intel_ntb_reg_write(8, XEON_SBAR0BASE_OFFSET, bar_addr);
1802 * Other SBARs are normally hit by the PBAR xlat, except for the b2b
1803 * register BAR. The B2B BAR is either disabled above or configured
1804 * half-size. It starts at PBAR xlat + offset.
1806 * Also set up incoming BAR limits == base (zero length window).
1808 xeon_set_sbar_base_and_limit(ntb, addr->bar2_addr64, NTB_B2B_BAR_1,
1810 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
1811 xeon_set_sbar_base_and_limit(ntb, addr->bar4_addr32,
1812 NTB_B2B_BAR_2, b2b_bar_num);
1813 xeon_set_sbar_base_and_limit(ntb, addr->bar5_addr32,
1814 NTB_B2B_BAR_3, b2b_bar_num);
1816 xeon_set_sbar_base_and_limit(ntb, addr->bar4_addr64,
1817 NTB_B2B_BAR_2, b2b_bar_num);
1819 /* Zero incoming translation addrs */
1820 intel_ntb_reg_write(8, XEON_SBAR2XLAT_OFFSET, 0);
1821 intel_ntb_reg_write(8, XEON_SBAR4XLAT_OFFSET, 0);
1823 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
1824 uint32_t xlat_reg, lmt_reg;
1825 enum ntb_bar bar_num;
1828 * We point the chosen MSIX MW BAR xlat to remote LAPIC for
1831 bar_num = intel_ntb_mw_to_bar(ntb, ntb->msix_mw_idx);
1832 bar_get_xlat_params(ntb, bar_num, NULL, &xlat_reg, &lmt_reg);
1833 if (bar_is_64bit(ntb, bar_num)) {
1834 intel_ntb_reg_write(8, xlat_reg, MSI_INTEL_ADDR_BASE);
1835 ntb->msix_xlat = intel_ntb_reg_read(8, xlat_reg);
1836 intel_ntb_reg_write(8, lmt_reg, 0);
1838 intel_ntb_reg_write(4, xlat_reg, MSI_INTEL_ADDR_BASE);
1839 ntb->msix_xlat = intel_ntb_reg_read(4, xlat_reg);
1840 intel_ntb_reg_write(4, lmt_reg, 0);
1843 ntb->peer_lapic_bar = &ntb->bar_info[bar_num];
1845 (void)intel_ntb_reg_read(8, XEON_SBAR2XLAT_OFFSET);
1846 (void)intel_ntb_reg_read(8, XEON_SBAR4XLAT_OFFSET);
1848 /* Zero outgoing translation limits (whole bar size windows) */
1849 intel_ntb_reg_write(8, XEON_PBAR2LMT_OFFSET, 0);
1850 intel_ntb_reg_write(8, XEON_PBAR4LMT_OFFSET, 0);
1852 /* Set outgoing translation offsets */
1853 xeon_set_pbar_xlat(ntb, peer_addr->bar2_addr64, NTB_B2B_BAR_1);
1854 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
1855 xeon_set_pbar_xlat(ntb, peer_addr->bar4_addr32, NTB_B2B_BAR_2);
1856 xeon_set_pbar_xlat(ntb, peer_addr->bar5_addr32, NTB_B2B_BAR_3);
1858 xeon_set_pbar_xlat(ntb, peer_addr->bar4_addr64, NTB_B2B_BAR_2);
1860 /* Set the translation offset for B2B registers */
1862 if (b2b_bar_num == NTB_CONFIG_BAR)
1863 bar_addr = peer_addr->bar0_addr;
1864 else if (b2b_bar_num == NTB_B2B_BAR_1)
1865 bar_addr = peer_addr->bar2_addr64;
1866 else if (b2b_bar_num == NTB_B2B_BAR_2 && !HAS_FEATURE(ntb, NTB_SPLIT_BAR))
1867 bar_addr = peer_addr->bar4_addr64;
1868 else if (b2b_bar_num == NTB_B2B_BAR_2)
1869 bar_addr = peer_addr->bar4_addr32;
1870 else if (b2b_bar_num == NTB_B2B_BAR_3)
1871 bar_addr = peer_addr->bar5_addr32;
1873 KASSERT(false, ("invalid bar"));
1876 * B2B_XLAT_OFFSET is a 64-bit register but can only be written 32 bits
1879 intel_ntb_reg_write(4, XEON_B2B_XLAT_OFFSETL, bar_addr & 0xffffffff);
1880 intel_ntb_reg_write(4, XEON_B2B_XLAT_OFFSETU, bar_addr >> 32);
1885 _xeon_link_is_up(struct ntb_softc *ntb)
1888 if (ntb->conn_type == NTB_CONN_TRANSPARENT)
1890 return ((ntb->lnk_sta & NTB_LINK_STATUS_ACTIVE) != 0);
1894 link_is_up(struct ntb_softc *ntb)
1897 if (ntb->type == NTB_XEON)
1898 return (_xeon_link_is_up(ntb) && (ntb->peer_msix_good ||
1899 !HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)));
1901 KASSERT(ntb->type == NTB_ATOM, ("ntb type"));
1902 return ((ntb->ntb_ctl & ATOM_CNTL_LINK_DOWN) == 0);
1906 atom_link_is_err(struct ntb_softc *ntb)
1910 KASSERT(ntb->type == NTB_ATOM, ("ntb type"));
1912 status = intel_ntb_reg_read(4, ATOM_LTSSMSTATEJMP_OFFSET);
1913 if ((status & ATOM_LTSSMSTATEJMP_FORCEDETECT) != 0)
1916 status = intel_ntb_reg_read(4, ATOM_IBSTERRRCRVSTS0_OFFSET);
1917 return ((status & ATOM_IBIST_ERR_OFLOW) != 0);
1920 /* Atom does not have link status interrupt, poll on that platform */
1922 atom_link_hb(void *arg)
1924 struct ntb_softc *ntb = arg;
1925 sbintime_t timo, poll_ts;
1927 timo = NTB_HB_TIMEOUT * hz;
1928 poll_ts = ntb->last_ts + timo;
1931 * Delay polling the link status if an interrupt was received, unless
1932 * the cached link status says the link is down.
1934 if ((sbintime_t)ticks - poll_ts < 0 && link_is_up(ntb)) {
1935 timo = poll_ts - ticks;
1939 if (intel_ntb_poll_link(ntb))
1940 ntb_link_event(ntb->device);
1942 if (!link_is_up(ntb) && atom_link_is_err(ntb)) {
1943 /* Link is down with error, proceed with recovery */
1944 callout_reset(&ntb->lr_timer, 0, recover_atom_link, ntb);
1949 callout_reset(&ntb->heartbeat_timer, timo, atom_link_hb, ntb);
1953 atom_perform_link_restart(struct ntb_softc *ntb)
1957 /* Driver resets the NTB ModPhy lanes - magic! */
1958 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG6, 0xe0);
1959 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG4, 0x40);
1960 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG4, 0x60);
1961 intel_ntb_reg_write(1, ATOM_MODPHY_PCSREG6, 0x60);
1963 /* Driver waits 100ms to allow the NTB ModPhy to settle */
1964 pause("ModPhy", hz / 10);
1966 /* Clear AER Errors, write to clear */
1967 status = intel_ntb_reg_read(4, ATOM_ERRCORSTS_OFFSET);
1968 status &= PCIM_AER_COR_REPLAY_ROLLOVER;
1969 intel_ntb_reg_write(4, ATOM_ERRCORSTS_OFFSET, status);
1971 /* Clear unexpected electrical idle event in LTSSM, write to clear */
1972 status = intel_ntb_reg_read(4, ATOM_LTSSMERRSTS0_OFFSET);
1973 status |= ATOM_LTSSMERRSTS0_UNEXPECTEDEI;
1974 intel_ntb_reg_write(4, ATOM_LTSSMERRSTS0_OFFSET, status);
1976 /* Clear DeSkew Buffer error, write to clear */
1977 status = intel_ntb_reg_read(4, ATOM_DESKEWSTS_OFFSET);
1978 status |= ATOM_DESKEWSTS_DBERR;
1979 intel_ntb_reg_write(4, ATOM_DESKEWSTS_OFFSET, status);
1981 status = intel_ntb_reg_read(4, ATOM_IBSTERRRCRVSTS0_OFFSET);
1982 status &= ATOM_IBIST_ERR_OFLOW;
1983 intel_ntb_reg_write(4, ATOM_IBSTERRRCRVSTS0_OFFSET, status);
1985 /* Releases the NTB state machine to allow the link to retrain */
1986 status = intel_ntb_reg_read(4, ATOM_LTSSMSTATEJMP_OFFSET);
1987 status &= ~ATOM_LTSSMSTATEJMP_FORCEDETECT;
1988 intel_ntb_reg_write(4, ATOM_LTSSMSTATEJMP_OFFSET, status);
1992 intel_ntb_link_enable(device_t dev, enum ntb_speed speed __unused,
1993 enum ntb_width width __unused)
1995 struct ntb_softc *ntb = device_get_softc(dev);
1998 intel_ntb_printf(2, "%s\n", __func__);
2000 if (ntb->type == NTB_ATOM) {
2001 pci_write_config(ntb->device, NTB_PPD_OFFSET,
2002 ntb->ppd | ATOM_PPD_INIT_LINK, 4);
2006 if (ntb->conn_type == NTB_CONN_TRANSPARENT) {
2007 ntb_link_event(dev);
2011 cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2012 cntl &= ~(NTB_CNTL_LINK_DISABLE | NTB_CNTL_CFG_LOCK);
2013 cntl |= NTB_CNTL_P2S_BAR23_SNOOP | NTB_CNTL_S2P_BAR23_SNOOP;
2014 cntl |= NTB_CNTL_P2S_BAR4_SNOOP | NTB_CNTL_S2P_BAR4_SNOOP;
2015 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR))
2016 cntl |= NTB_CNTL_P2S_BAR5_SNOOP | NTB_CNTL_S2P_BAR5_SNOOP;
2017 intel_ntb_reg_write(4, ntb->reg->ntb_ctl, cntl);
2022 intel_ntb_link_disable(device_t dev)
2024 struct ntb_softc *ntb = device_get_softc(dev);
2027 intel_ntb_printf(2, "%s\n", __func__);
2029 if (ntb->conn_type == NTB_CONN_TRANSPARENT) {
2030 ntb_link_event(dev);
2034 cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2035 cntl &= ~(NTB_CNTL_P2S_BAR23_SNOOP | NTB_CNTL_S2P_BAR23_SNOOP);
2036 cntl &= ~(NTB_CNTL_P2S_BAR4_SNOOP | NTB_CNTL_S2P_BAR4_SNOOP);
2037 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR))
2038 cntl &= ~(NTB_CNTL_P2S_BAR5_SNOOP | NTB_CNTL_S2P_BAR5_SNOOP);
2039 cntl |= NTB_CNTL_LINK_DISABLE | NTB_CNTL_CFG_LOCK;
2040 intel_ntb_reg_write(4, ntb->reg->ntb_ctl, cntl);
2045 intel_ntb_link_enabled(device_t dev)
2047 struct ntb_softc *ntb = device_get_softc(dev);
2050 if (ntb->type == NTB_ATOM) {
2051 cntl = pci_read_config(ntb->device, NTB_PPD_OFFSET, 4);
2052 return ((cntl & ATOM_PPD_INIT_LINK) != 0);
2055 if (ntb->conn_type == NTB_CONN_TRANSPARENT)
2058 cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2059 return ((cntl & NTB_CNTL_LINK_DISABLE) == 0);
2063 recover_atom_link(void *arg)
2065 struct ntb_softc *ntb = arg;
2066 unsigned speed, width, oldspeed, oldwidth;
2069 atom_perform_link_restart(ntb);
2072 * There is a potential race between the 2 NTB devices recovering at
2073 * the same time. If the times are the same, the link will not recover
2074 * and the driver will be stuck in this loop forever. Add a random
2075 * interval to the recovery time to prevent this race.
2077 status32 = arc4random() % ATOM_LINK_RECOVERY_TIME;
2078 pause("Link", (ATOM_LINK_RECOVERY_TIME + status32) * hz / 1000);
2080 if (atom_link_is_err(ntb))
2083 status32 = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2084 if ((status32 & ATOM_CNTL_LINK_DOWN) != 0)
2087 status32 = intel_ntb_reg_read(4, ntb->reg->lnk_sta);
2088 width = NTB_LNK_STA_WIDTH(status32);
2089 speed = status32 & NTB_LINK_SPEED_MASK;
2091 oldwidth = NTB_LNK_STA_WIDTH(ntb->lnk_sta);
2092 oldspeed = ntb->lnk_sta & NTB_LINK_SPEED_MASK;
2093 if (oldwidth != width || oldspeed != speed)
2097 callout_reset(&ntb->heartbeat_timer, NTB_HB_TIMEOUT * hz, atom_link_hb,
2102 callout_reset(&ntb->lr_timer, NTB_HB_TIMEOUT * hz, recover_atom_link,
2107 * Polls the HW link status register(s); returns true if something has changed.
2110 intel_ntb_poll_link(struct ntb_softc *ntb)
2115 if (ntb->type == NTB_ATOM) {
2116 ntb_cntl = intel_ntb_reg_read(4, ntb->reg->ntb_ctl);
2117 if (ntb_cntl == ntb->ntb_ctl)
2120 ntb->ntb_ctl = ntb_cntl;
2121 ntb->lnk_sta = intel_ntb_reg_read(4, ntb->reg->lnk_sta);
2123 db_iowrite_raw(ntb, ntb->self_reg->db_bell, ntb->db_link_mask);
2125 reg_val = pci_read_config(ntb->device, ntb->reg->lnk_sta, 2);
2126 if (reg_val == ntb->lnk_sta)
2129 ntb->lnk_sta = reg_val;
2131 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
2132 if (_xeon_link_is_up(ntb)) {
2133 if (!ntb->peer_msix_good) {
2134 callout_reset(&ntb->peer_msix_work, 0,
2135 intel_ntb_exchange_msix, ntb);
2139 ntb->peer_msix_good = false;
2140 ntb->peer_msix_done = false;
2147 static inline enum ntb_speed
2148 intel_ntb_link_sta_speed(struct ntb_softc *ntb)
2151 if (!link_is_up(ntb))
2152 return (NTB_SPEED_NONE);
2153 return (ntb->lnk_sta & NTB_LINK_SPEED_MASK);
2156 static inline enum ntb_width
2157 intel_ntb_link_sta_width(struct ntb_softc *ntb)
2160 if (!link_is_up(ntb))
2161 return (NTB_WIDTH_NONE);
2162 return (NTB_LNK_STA_WIDTH(ntb->lnk_sta));
2165 SYSCTL_NODE(_hw_ntb, OID_AUTO, debug_info, CTLFLAG_RW, 0,
2166 "Driver state, statistics, and HW registers");
2168 #define NTB_REGSZ_MASK (3ul << 30)
2169 #define NTB_REG_64 (1ul << 30)
2170 #define NTB_REG_32 (2ul << 30)
2171 #define NTB_REG_16 (3ul << 30)
2172 #define NTB_REG_8 (0ul << 30)
2174 #define NTB_DB_READ (1ul << 29)
2175 #define NTB_PCI_REG (1ul << 28)
2176 #define NTB_REGFLAGS_MASK (NTB_REGSZ_MASK | NTB_DB_READ | NTB_PCI_REG)
2179 intel_ntb_sysctl_init(struct ntb_softc *ntb)
2181 struct sysctl_oid_list *globals, *tree_par, *regpar, *statpar, *errpar;
2182 struct sysctl_ctx_list *ctx;
2183 struct sysctl_oid *tree, *tmptree;
2185 ctx = device_get_sysctl_ctx(ntb->device);
2186 globals = SYSCTL_CHILDREN(device_get_sysctl_tree(ntb->device));
2188 SYSCTL_ADD_PROC(ctx, globals, OID_AUTO, "link_status",
2189 CTLFLAG_RD | CTLTYPE_STRING, ntb, 0,
2190 sysctl_handle_link_status_human, "A",
2191 "Link status (human readable)");
2192 SYSCTL_ADD_PROC(ctx, globals, OID_AUTO, "active",
2193 CTLFLAG_RD | CTLTYPE_UINT, ntb, 0, sysctl_handle_link_status,
2194 "IU", "Link status (1=active, 0=inactive)");
2195 SYSCTL_ADD_PROC(ctx, globals, OID_AUTO, "admin_up",
2196 CTLFLAG_RW | CTLTYPE_UINT, ntb, 0, sysctl_handle_link_admin,
2197 "IU", "Set/get interface status (1=UP, 0=DOWN)");
2199 tree = SYSCTL_ADD_NODE(ctx, globals, OID_AUTO, "debug_info",
2200 CTLFLAG_RD, NULL, "Driver state, statistics, and HW registers");
2201 tree_par = SYSCTL_CHILDREN(tree);
2203 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "conn_type", CTLFLAG_RD,
2204 &ntb->conn_type, 0, "0 - Transparent; 1 - B2B; 2 - Root Port");
2205 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "dev_type", CTLFLAG_RD,
2206 &ntb->dev_type, 0, "0 - USD; 1 - DSD");
2207 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "ppd", CTLFLAG_RD,
2208 &ntb->ppd, 0, "Raw PPD register (cached)");
2210 if (ntb->b2b_mw_idx != B2B_MW_DISABLED) {
2212 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "b2b_idx", CTLFLAG_RD,
2213 &ntb->b2b_mw_idx, 0,
2214 "Index of the MW used for B2B remote register access");
2216 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "b2b_off",
2217 CTLFLAG_RD, &ntb->b2b_off,
2218 "If non-zero, offset of B2B register region in shared MW");
2221 SYSCTL_ADD_PROC(ctx, tree_par, OID_AUTO, "features",
2222 CTLFLAG_RD | CTLTYPE_STRING, ntb, 0, sysctl_handle_features, "A",
2223 "Features/errata of this NTB device");
2225 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "ntb_ctl", CTLFLAG_RD,
2226 __DEVOLATILE(uint32_t *, &ntb->ntb_ctl), 0,
2227 "NTB CTL register (cached)");
2228 SYSCTL_ADD_UINT(ctx, tree_par, OID_AUTO, "lnk_sta", CTLFLAG_RD,
2229 __DEVOLATILE(uint32_t *, &ntb->lnk_sta), 0,
2230 "LNK STA register (cached)");
2233 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "mw_count", CTLFLAG_RD,
2234 &ntb->mw_count, 0, "MW count");
2235 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "spad_count", CTLFLAG_RD,
2236 &ntb->spad_count, 0, "Scratchpad count");
2237 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "db_count", CTLFLAG_RD,
2238 &ntb->db_count, 0, "Doorbell count");
2239 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "db_vec_count", CTLFLAG_RD,
2240 &ntb->db_vec_count, 0, "Doorbell vector count");
2241 SYSCTL_ADD_U8(ctx, tree_par, OID_AUTO, "db_vec_shift", CTLFLAG_RD,
2242 &ntb->db_vec_shift, 0, "Doorbell vector shift");
2245 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "db_valid_mask", CTLFLAG_RD,
2246 &ntb->db_valid_mask, "Doorbell valid mask");
2247 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "db_link_mask", CTLFLAG_RD,
2248 &ntb->db_link_mask, "Doorbell link mask");
2249 SYSCTL_ADD_UQUAD(ctx, tree_par, OID_AUTO, "db_mask", CTLFLAG_RD,
2250 &ntb->db_mask, "Doorbell mask (cached)");
2252 tmptree = SYSCTL_ADD_NODE(ctx, tree_par, OID_AUTO, "registers",
2253 CTLFLAG_RD, NULL, "Raw HW registers (big-endian)");
2254 regpar = SYSCTL_CHILDREN(tmptree);
2256 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "ntbcntl",
2257 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb, NTB_REG_32 |
2258 ntb->reg->ntb_ctl, sysctl_handle_register, "IU",
2259 "NTB Control register");
2260 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "lnkcap",
2261 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb, NTB_REG_32 |
2262 0x19c, sysctl_handle_register, "IU",
2263 "NTB Link Capabilities");
2264 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "lnkcon",
2265 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb, NTB_REG_32 |
2266 0x1a0, sysctl_handle_register, "IU",
2267 "NTB Link Control register");
2269 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "db_mask",
2270 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2271 NTB_REG_64 | NTB_DB_READ | ntb->self_reg->db_mask,
2272 sysctl_handle_register, "QU", "Doorbell mask register");
2273 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "db_bell",
2274 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2275 NTB_REG_64 | NTB_DB_READ | ntb->self_reg->db_bell,
2276 sysctl_handle_register, "QU", "Doorbell register");
2278 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat23",
2279 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2280 NTB_REG_64 | ntb->xlat_reg->bar2_xlat,
2281 sysctl_handle_register, "QU", "Incoming XLAT23 register");
2282 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2283 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat4",
2284 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2285 NTB_REG_32 | ntb->xlat_reg->bar4_xlat,
2286 sysctl_handle_register, "IU", "Incoming XLAT4 register");
2287 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat5",
2288 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2289 NTB_REG_32 | ntb->xlat_reg->bar5_xlat,
2290 sysctl_handle_register, "IU", "Incoming XLAT5 register");
2292 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_xlat45",
2293 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2294 NTB_REG_64 | ntb->xlat_reg->bar4_xlat,
2295 sysctl_handle_register, "QU", "Incoming XLAT45 register");
2298 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt23",
2299 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2300 NTB_REG_64 | ntb->xlat_reg->bar2_limit,
2301 sysctl_handle_register, "QU", "Incoming LMT23 register");
2302 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2303 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt4",
2304 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2305 NTB_REG_32 | ntb->xlat_reg->bar4_limit,
2306 sysctl_handle_register, "IU", "Incoming LMT4 register");
2307 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt5",
2308 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2309 NTB_REG_32 | ntb->xlat_reg->bar5_limit,
2310 sysctl_handle_register, "IU", "Incoming LMT5 register");
2312 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "incoming_lmt45",
2313 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2314 NTB_REG_64 | ntb->xlat_reg->bar4_limit,
2315 sysctl_handle_register, "QU", "Incoming LMT45 register");
2318 if (ntb->type == NTB_ATOM)
2321 tmptree = SYSCTL_ADD_NODE(ctx, regpar, OID_AUTO, "xeon_stats",
2322 CTLFLAG_RD, NULL, "Xeon HW statistics");
2323 statpar = SYSCTL_CHILDREN(tmptree);
2324 SYSCTL_ADD_PROC(ctx, statpar, OID_AUTO, "upstream_mem_miss",
2325 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2326 NTB_REG_16 | XEON_USMEMMISS_OFFSET,
2327 sysctl_handle_register, "SU", "Upstream Memory Miss");
2329 tmptree = SYSCTL_ADD_NODE(ctx, regpar, OID_AUTO, "xeon_hw_err",
2330 CTLFLAG_RD, NULL, "Xeon HW errors");
2331 errpar = SYSCTL_CHILDREN(tmptree);
2333 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "ppd",
2334 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2335 NTB_REG_8 | NTB_PCI_REG | NTB_PPD_OFFSET,
2336 sysctl_handle_register, "CU", "PPD");
2338 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "pbar23_sz",
2339 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2340 NTB_REG_8 | NTB_PCI_REG | XEON_PBAR23SZ_OFFSET,
2341 sysctl_handle_register, "CU", "PBAR23 SZ (log2)");
2342 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "pbar4_sz",
2343 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2344 NTB_REG_8 | NTB_PCI_REG | XEON_PBAR4SZ_OFFSET,
2345 sysctl_handle_register, "CU", "PBAR4 SZ (log2)");
2346 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "pbar5_sz",
2347 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2348 NTB_REG_8 | NTB_PCI_REG | XEON_PBAR5SZ_OFFSET,
2349 sysctl_handle_register, "CU", "PBAR5 SZ (log2)");
2351 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar23_sz",
2352 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2353 NTB_REG_8 | NTB_PCI_REG | XEON_SBAR23SZ_OFFSET,
2354 sysctl_handle_register, "CU", "SBAR23 SZ (log2)");
2355 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar4_sz",
2356 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2357 NTB_REG_8 | NTB_PCI_REG | XEON_SBAR4SZ_OFFSET,
2358 sysctl_handle_register, "CU", "SBAR4 SZ (log2)");
2359 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar5_sz",
2360 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2361 NTB_REG_8 | NTB_PCI_REG | XEON_SBAR5SZ_OFFSET,
2362 sysctl_handle_register, "CU", "SBAR5 SZ (log2)");
2364 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "devsts",
2365 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2366 NTB_REG_16 | NTB_PCI_REG | XEON_DEVSTS_OFFSET,
2367 sysctl_handle_register, "SU", "DEVSTS");
2368 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "lnksts",
2369 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2370 NTB_REG_16 | NTB_PCI_REG | XEON_LINK_STATUS_OFFSET,
2371 sysctl_handle_register, "SU", "LNKSTS");
2372 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "slnksts",
2373 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2374 NTB_REG_16 | NTB_PCI_REG | XEON_SLINK_STATUS_OFFSET,
2375 sysctl_handle_register, "SU", "SLNKSTS");
2377 SYSCTL_ADD_PROC(ctx, errpar, OID_AUTO, "uncerrsts",
2378 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2379 NTB_REG_32 | NTB_PCI_REG | XEON_UNCERRSTS_OFFSET,
2380 sysctl_handle_register, "IU", "UNCERRSTS");
2381 SYSCTL_ADD_PROC(ctx, errpar, OID_AUTO, "corerrsts",
2382 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2383 NTB_REG_32 | NTB_PCI_REG | XEON_CORERRSTS_OFFSET,
2384 sysctl_handle_register, "IU", "CORERRSTS");
2386 if (ntb->conn_type != NTB_CONN_B2B)
2389 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat23",
2390 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2391 NTB_REG_64 | ntb->bar_info[NTB_B2B_BAR_1].pbarxlat_off,
2392 sysctl_handle_register, "QU", "Outgoing XLAT23 register");
2393 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2394 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat4",
2395 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2396 NTB_REG_32 | ntb->bar_info[NTB_B2B_BAR_2].pbarxlat_off,
2397 sysctl_handle_register, "IU", "Outgoing XLAT4 register");
2398 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat5",
2399 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2400 NTB_REG_32 | ntb->bar_info[NTB_B2B_BAR_3].pbarxlat_off,
2401 sysctl_handle_register, "IU", "Outgoing XLAT5 register");
2403 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_xlat45",
2404 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2405 NTB_REG_64 | ntb->bar_info[NTB_B2B_BAR_2].pbarxlat_off,
2406 sysctl_handle_register, "QU", "Outgoing XLAT45 register");
2409 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt23",
2410 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2411 NTB_REG_64 | XEON_PBAR2LMT_OFFSET,
2412 sysctl_handle_register, "QU", "Outgoing LMT23 register");
2413 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2414 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt4",
2415 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2416 NTB_REG_32 | XEON_PBAR4LMT_OFFSET,
2417 sysctl_handle_register, "IU", "Outgoing LMT4 register");
2418 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt5",
2419 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2420 NTB_REG_32 | XEON_PBAR5LMT_OFFSET,
2421 sysctl_handle_register, "IU", "Outgoing LMT5 register");
2423 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "outgoing_lmt45",
2424 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2425 NTB_REG_64 | XEON_PBAR4LMT_OFFSET,
2426 sysctl_handle_register, "QU", "Outgoing LMT45 register");
2429 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar01_base",
2430 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2431 NTB_REG_64 | ntb->xlat_reg->bar0_base,
2432 sysctl_handle_register, "QU", "Secondary BAR01 base register");
2433 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar23_base",
2434 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2435 NTB_REG_64 | ntb->xlat_reg->bar2_base,
2436 sysctl_handle_register, "QU", "Secondary BAR23 base register");
2437 if (HAS_FEATURE(ntb, NTB_SPLIT_BAR)) {
2438 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar4_base",
2439 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2440 NTB_REG_32 | ntb->xlat_reg->bar4_base,
2441 sysctl_handle_register, "IU",
2442 "Secondary BAR4 base register");
2443 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar5_base",
2444 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2445 NTB_REG_32 | ntb->xlat_reg->bar5_base,
2446 sysctl_handle_register, "IU",
2447 "Secondary BAR5 base register");
2449 SYSCTL_ADD_PROC(ctx, regpar, OID_AUTO, "sbar45_base",
2450 CTLFLAG_RD | CTLTYPE_OPAQUE, ntb,
2451 NTB_REG_64 | ntb->xlat_reg->bar4_base,
2452 sysctl_handle_register, "QU",
2453 "Secondary BAR45 base register");
2458 sysctl_handle_features(SYSCTL_HANDLER_ARGS)
2460 struct ntb_softc *ntb = arg1;
2464 sbuf_new_for_sysctl(&sb, NULL, 256, req);
2466 sbuf_printf(&sb, "%b", ntb->features, NTB_FEATURES_STR);
2467 error = sbuf_finish(&sb);
2470 if (error || !req->newptr)
2476 sysctl_handle_link_admin(SYSCTL_HANDLER_ARGS)
2478 struct ntb_softc *ntb = arg1;
2482 old = intel_ntb_link_enabled(ntb->device);
2484 error = SYSCTL_OUT(req, &old, sizeof(old));
2485 if (error != 0 || req->newptr == NULL)
2488 error = SYSCTL_IN(req, &new, sizeof(new));
2492 intel_ntb_printf(0, "Admin set interface state to '%sabled'\n",
2493 (new != 0)? "en" : "dis");
2496 error = intel_ntb_link_enable(ntb->device, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
2498 error = intel_ntb_link_disable(ntb->device);
2503 sysctl_handle_link_status_human(SYSCTL_HANDLER_ARGS)
2505 struct ntb_softc *ntb = arg1;
2507 enum ntb_speed speed;
2508 enum ntb_width width;
2511 sbuf_new_for_sysctl(&sb, NULL, 32, req);
2513 if (intel_ntb_link_is_up(ntb->device, &speed, &width))
2514 sbuf_printf(&sb, "up / PCIe Gen %u / Width x%u",
2515 (unsigned)speed, (unsigned)width);
2517 sbuf_printf(&sb, "down");
2519 error = sbuf_finish(&sb);
2522 if (error || !req->newptr)
2528 sysctl_handle_link_status(SYSCTL_HANDLER_ARGS)
2530 struct ntb_softc *ntb = arg1;
2534 res = intel_ntb_link_is_up(ntb->device, NULL, NULL);
2536 error = SYSCTL_OUT(req, &res, sizeof(res));
2537 if (error || !req->newptr)
2543 sysctl_handle_register(SYSCTL_HANDLER_ARGS)
2545 struct ntb_softc *ntb;
2549 char be[sizeof(umv)];
2556 reg = arg2 & ~NTB_REGFLAGS_MASK;
2557 sz = arg2 & NTB_REGSZ_MASK;
2558 db = (arg2 & NTB_DB_READ) != 0;
2559 pci = (arg2 & NTB_PCI_REG) != 0;
2561 KASSERT(!(db && pci), ("bogus"));
2564 KASSERT(sz == NTB_REG_64, ("bogus"));
2565 umv = db_ioread(ntb, reg);
2566 outsz = sizeof(uint64_t);
2571 umv = pci_read_config(ntb->device, reg, 8);
2573 umv = intel_ntb_reg_read(8, reg);
2574 outsz = sizeof(uint64_t);
2578 umv = pci_read_config(ntb->device, reg, 4);
2580 umv = intel_ntb_reg_read(4, reg);
2581 outsz = sizeof(uint32_t);
2585 umv = pci_read_config(ntb->device, reg, 2);
2587 umv = intel_ntb_reg_read(2, reg);
2588 outsz = sizeof(uint16_t);
2592 umv = pci_read_config(ntb->device, reg, 1);
2594 umv = intel_ntb_reg_read(1, reg);
2595 outsz = sizeof(uint8_t);
2603 /* Encode bigendian so that sysctl -x is legible. */
2605 outp = ((char *)be) + sizeof(umv) - outsz;
2607 error = SYSCTL_OUT(req, outp, outsz);
2608 if (error || !req->newptr)
2614 intel_ntb_user_mw_to_idx(struct ntb_softc *ntb, unsigned uidx)
2617 if ((ntb->b2b_mw_idx != B2B_MW_DISABLED && ntb->b2b_off == 0 &&
2618 uidx >= ntb->b2b_mw_idx) ||
2619 (ntb->msix_mw_idx != B2B_MW_DISABLED && uidx >= ntb->msix_mw_idx))
2621 if ((ntb->b2b_mw_idx != B2B_MW_DISABLED && ntb->b2b_off == 0 &&
2622 uidx >= ntb->b2b_mw_idx) &&
2623 (ntb->msix_mw_idx != B2B_MW_DISABLED && uidx >= ntb->msix_mw_idx))
2628 #ifndef EARLY_AP_STARTUP
2629 static int msix_ready;
2632 intel_ntb_msix_ready(void *arg __unused)
2637 SYSINIT(intel_ntb_msix_ready, SI_SUB_SMP, SI_ORDER_ANY,
2638 intel_ntb_msix_ready, NULL);
2642 intel_ntb_exchange_msix(void *ctx)
2644 struct ntb_softc *ntb;
2650 if (ntb->peer_msix_good)
2652 if (ntb->peer_msix_done)
2655 #ifndef EARLY_AP_STARTUP
2656 /* Block MSIX negotiation until SMP started and IRQ reshuffled. */
2661 intel_ntb_get_msix_info(ntb);
2662 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
2663 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_DATA0 + i,
2664 ntb->msix_data[i].nmd_data);
2665 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_OFS0 + i,
2666 ntb->msix_data[i].nmd_ofs - ntb->msix_xlat);
2668 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_GUARD, NTB_MSIX_VER_GUARD);
2670 intel_ntb_spad_read(ntb->device, NTB_MSIX_GUARD, &val);
2671 if (val != NTB_MSIX_VER_GUARD)
2674 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
2675 intel_ntb_spad_read(ntb->device, NTB_MSIX_DATA0 + i, &val);
2676 intel_ntb_printf(2, "remote MSIX data(%u): 0x%x\n", i, val);
2677 ntb->peer_msix_data[i].nmd_data = val;
2678 intel_ntb_spad_read(ntb->device, NTB_MSIX_OFS0 + i, &val);
2679 intel_ntb_printf(2, "remote MSIX addr(%u): 0x%x\n", i, val);
2680 ntb->peer_msix_data[i].nmd_ofs = val;
2683 ntb->peer_msix_done = true;
2686 intel_ntb_peer_spad_write(ntb->device, NTB_MSIX_DONE, NTB_MSIX_RECEIVED);
2687 intel_ntb_spad_read(ntb->device, NTB_MSIX_DONE, &val);
2688 if (val != NTB_MSIX_RECEIVED)
2691 intel_ntb_spad_clear(ntb->device);
2692 ntb->peer_msix_good = true;
2693 /* Give peer time to see our NTB_MSIX_RECEIVED. */
2697 intel_ntb_poll_link(ntb);
2698 ntb_link_event(ntb->device);
2702 ntb->lnk_sta = pci_read_config(ntb->device, ntb->reg->lnk_sta, 2);
2703 if (_xeon_link_is_up(ntb)) {
2704 callout_reset(&ntb->peer_msix_work,
2705 hz * (ntb->peer_msix_good ? 2 : 1) / 100,
2706 intel_ntb_exchange_msix, ntb);
2708 intel_ntb_spad_clear(ntb->device);
2712 * Public API to the rest of the OS
2716 intel_ntb_spad_count(device_t dev)
2718 struct ntb_softc *ntb = device_get_softc(dev);
2720 return (ntb->spad_count);
2724 intel_ntb_mw_count(device_t dev)
2726 struct ntb_softc *ntb = device_get_softc(dev);
2729 res = ntb->mw_count;
2730 if (ntb->b2b_mw_idx != B2B_MW_DISABLED && ntb->b2b_off == 0)
2732 if (ntb->msix_mw_idx != B2B_MW_DISABLED)
2738 intel_ntb_spad_write(device_t dev, unsigned int idx, uint32_t val)
2740 struct ntb_softc *ntb = device_get_softc(dev);
2742 if (idx >= ntb->spad_count)
2745 intel_ntb_reg_write(4, ntb->self_reg->spad + idx * 4, val);
2751 * Zeros the local scratchpad.
2754 intel_ntb_spad_clear(device_t dev)
2756 struct ntb_softc *ntb = device_get_softc(dev);
2759 for (i = 0; i < ntb->spad_count; i++)
2760 intel_ntb_spad_write(dev, i, 0);
2764 intel_ntb_spad_read(device_t dev, unsigned int idx, uint32_t *val)
2766 struct ntb_softc *ntb = device_get_softc(dev);
2768 if (idx >= ntb->spad_count)
2771 *val = intel_ntb_reg_read(4, ntb->self_reg->spad + idx * 4);
2777 intel_ntb_peer_spad_write(device_t dev, unsigned int idx, uint32_t val)
2779 struct ntb_softc *ntb = device_get_softc(dev);
2781 if (idx >= ntb->spad_count)
2784 if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP))
2785 intel_ntb_mw_write(4, XEON_SPAD_OFFSET + idx * 4, val);
2787 intel_ntb_reg_write(4, ntb->peer_reg->spad + idx * 4, val);
2793 intel_ntb_peer_spad_read(device_t dev, unsigned int idx, uint32_t *val)
2795 struct ntb_softc *ntb = device_get_softc(dev);
2797 if (idx >= ntb->spad_count)
2800 if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP))
2801 *val = intel_ntb_mw_read(4, XEON_SPAD_OFFSET + idx * 4);
2803 *val = intel_ntb_reg_read(4, ntb->peer_reg->spad + idx * 4);
2809 intel_ntb_mw_get_range(device_t dev, unsigned mw_idx, vm_paddr_t *base,
2810 caddr_t *vbase, size_t *size, size_t *align, size_t *align_size,
2813 struct ntb_softc *ntb = device_get_softc(dev);
2814 struct ntb_pci_bar_info *bar;
2817 enum ntb_bar bar_num;
2819 if (mw_idx >= intel_ntb_mw_count(dev))
2821 mw_idx = intel_ntb_user_mw_to_idx(ntb, mw_idx);
2823 bar_num = intel_ntb_mw_to_bar(ntb, mw_idx);
2824 bar = &ntb->bar_info[bar_num];
2826 if (mw_idx == ntb->b2b_mw_idx) {
2827 KASSERT(ntb->b2b_off != 0,
2828 ("user shouldn't get non-shared b2b mw"));
2829 bar_b2b_off = ntb->b2b_off;
2832 if (bar_is_64bit(ntb, bar_num))
2833 limit = BUS_SPACE_MAXADDR;
2835 limit = BUS_SPACE_MAXADDR_32BIT;
2838 *base = bar->pbase + bar_b2b_off;
2840 *vbase = bar->vbase + bar_b2b_off;
2842 *size = bar->size - bar_b2b_off;
2845 if (align_size != NULL)
2853 intel_ntb_mw_set_trans(device_t dev, unsigned idx, bus_addr_t addr, size_t size)
2855 struct ntb_softc *ntb = device_get_softc(dev);
2856 struct ntb_pci_bar_info *bar;
2857 uint64_t base, limit, reg_val;
2858 size_t bar_size, mw_size;
2859 uint32_t base_reg, xlat_reg, limit_reg;
2860 enum ntb_bar bar_num;
2862 if (idx >= intel_ntb_mw_count(dev))
2864 idx = intel_ntb_user_mw_to_idx(ntb, idx);
2866 bar_num = intel_ntb_mw_to_bar(ntb, idx);
2867 bar = &ntb->bar_info[bar_num];
2869 bar_size = bar->size;
2870 if (idx == ntb->b2b_mw_idx)
2871 mw_size = bar_size - ntb->b2b_off;
2875 /* Hardware requires that addr is aligned to bar size */
2876 if ((addr & (bar_size - 1)) != 0)
2882 bar_get_xlat_params(ntb, bar_num, &base_reg, &xlat_reg, &limit_reg);
2885 if (bar_is_64bit(ntb, bar_num)) {
2886 base = intel_ntb_reg_read(8, base_reg) & BAR_HIGH_MASK;
2888 if (limit_reg != 0 && size != mw_size)
2889 limit = base + size;
2891 /* Set and verify translation address */
2892 intel_ntb_reg_write(8, xlat_reg, addr);
2893 reg_val = intel_ntb_reg_read(8, xlat_reg) & BAR_HIGH_MASK;
2894 if (reg_val != addr) {
2895 intel_ntb_reg_write(8, xlat_reg, 0);
2899 /* Set and verify the limit */
2900 intel_ntb_reg_write(8, limit_reg, limit);
2901 reg_val = intel_ntb_reg_read(8, limit_reg) & BAR_HIGH_MASK;
2902 if (reg_val != limit) {
2903 intel_ntb_reg_write(8, limit_reg, base);
2904 intel_ntb_reg_write(8, xlat_reg, 0);
2908 /* Configure 32-bit (split) BAR MW */
2910 if ((addr & UINT32_MAX) != addr)
2912 if (((addr + size) & UINT32_MAX) != (addr + size))
2915 base = intel_ntb_reg_read(4, base_reg) & BAR_HIGH_MASK;
2917 if (limit_reg != 0 && size != mw_size)
2918 limit = base + size;
2920 /* Set and verify translation address */
2921 intel_ntb_reg_write(4, xlat_reg, addr);
2922 reg_val = intel_ntb_reg_read(4, xlat_reg) & BAR_HIGH_MASK;
2923 if (reg_val != addr) {
2924 intel_ntb_reg_write(4, xlat_reg, 0);
2928 /* Set and verify the limit */
2929 intel_ntb_reg_write(4, limit_reg, limit);
2930 reg_val = intel_ntb_reg_read(4, limit_reg) & BAR_HIGH_MASK;
2931 if (reg_val != limit) {
2932 intel_ntb_reg_write(4, limit_reg, base);
2933 intel_ntb_reg_write(4, xlat_reg, 0);
2941 intel_ntb_mw_clear_trans(device_t dev, unsigned mw_idx)
2944 return (intel_ntb_mw_set_trans(dev, mw_idx, 0, 0));
2948 intel_ntb_mw_get_wc(device_t dev, unsigned idx, vm_memattr_t *mode)
2950 struct ntb_softc *ntb = device_get_softc(dev);
2951 struct ntb_pci_bar_info *bar;
2953 if (idx >= intel_ntb_mw_count(dev))
2955 idx = intel_ntb_user_mw_to_idx(ntb, idx);
2957 bar = &ntb->bar_info[intel_ntb_mw_to_bar(ntb, idx)];
2958 *mode = bar->map_mode;
2963 intel_ntb_mw_set_wc(device_t dev, unsigned idx, vm_memattr_t mode)
2965 struct ntb_softc *ntb = device_get_softc(dev);
2967 if (idx >= intel_ntb_mw_count(dev))
2970 idx = intel_ntb_user_mw_to_idx(ntb, idx);
2971 return (intel_ntb_mw_set_wc_internal(ntb, idx, mode));
2975 intel_ntb_mw_set_wc_internal(struct ntb_softc *ntb, unsigned idx, vm_memattr_t mode)
2977 struct ntb_pci_bar_info *bar;
2980 bar = &ntb->bar_info[intel_ntb_mw_to_bar(ntb, idx)];
2981 if (bar->map_mode == mode)
2984 rc = pmap_change_attr((vm_offset_t)bar->vbase, bar->size, mode);
2986 bar->map_mode = mode;
2992 intel_ntb_peer_db_set(device_t dev, uint64_t bit)
2994 struct ntb_softc *ntb = device_get_softc(dev);
2996 if (HAS_FEATURE(ntb, NTB_SB01BASE_LOCKUP)) {
2997 struct ntb_pci_bar_info *lapic;
3000 lapic = ntb->peer_lapic_bar;
3002 for (i = 0; i < XEON_NONLINK_DB_MSIX_BITS; i++) {
3003 if ((bit & intel_ntb_db_vector_mask(dev, i)) != 0)
3004 bus_space_write_4(lapic->pci_bus_tag,
3005 lapic->pci_bus_handle,
3006 ntb->peer_msix_data[i].nmd_ofs,
3007 ntb->peer_msix_data[i].nmd_data);
3012 if (HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP)) {
3013 intel_ntb_mw_write(2, XEON_PDOORBELL_OFFSET, bit);
3017 db_iowrite(ntb, ntb->peer_reg->db_bell, bit);
3021 intel_ntb_peer_db_addr(device_t dev, bus_addr_t *db_addr, vm_size_t *db_size)
3023 struct ntb_softc *ntb = device_get_softc(dev);
3024 struct ntb_pci_bar_info *bar;
3027 KASSERT((db_addr != NULL && db_size != NULL), ("must be non-NULL"));
3029 if (!HAS_FEATURE(ntb, NTB_SDOORBELL_LOCKUP)) {
3030 bar = &ntb->bar_info[NTB_CONFIG_BAR];
3031 regoff = ntb->peer_reg->db_bell;
3033 KASSERT(ntb->b2b_mw_idx != B2B_MW_DISABLED,
3034 ("invalid b2b idx"));
3036 bar = &ntb->bar_info[intel_ntb_mw_to_bar(ntb, ntb->b2b_mw_idx)];
3037 regoff = XEON_PDOORBELL_OFFSET;
3039 KASSERT(bar->pci_bus_tag != X86_BUS_SPACE_IO, ("uh oh"));
3041 /* HACK: Specific to current x86 bus implementation. */
3042 *db_addr = ((uint64_t)bar->pci_bus_handle + regoff);
3043 *db_size = ntb->reg->db_size;
3048 intel_ntb_db_valid_mask(device_t dev)
3050 struct ntb_softc *ntb = device_get_softc(dev);
3052 return (ntb->db_valid_mask);
3056 intel_ntb_db_vector_count(device_t dev)
3058 struct ntb_softc *ntb = device_get_softc(dev);
3060 return (ntb->db_vec_count);
3064 intel_ntb_db_vector_mask(device_t dev, uint32_t vector)
3066 struct ntb_softc *ntb = device_get_softc(dev);
3068 if (vector > ntb->db_vec_count)
3070 return (ntb->db_valid_mask & intel_ntb_vec_mask(ntb, vector));
3074 intel_ntb_link_is_up(device_t dev, enum ntb_speed *speed, enum ntb_width *width)
3076 struct ntb_softc *ntb = device_get_softc(dev);
3079 *speed = intel_ntb_link_sta_speed(ntb);
3081 *width = intel_ntb_link_sta_width(ntb);
3082 return (link_is_up(ntb));
3086 save_bar_parameters(struct ntb_pci_bar_info *bar)
3089 bar->pci_bus_tag = rman_get_bustag(bar->pci_resource);
3090 bar->pci_bus_handle = rman_get_bushandle(bar->pci_resource);
3091 bar->pbase = rman_get_start(bar->pci_resource);
3092 bar->size = rman_get_size(bar->pci_resource);
3093 bar->vbase = rman_get_virtual(bar->pci_resource);
3096 static device_method_t ntb_intel_methods[] = {
3097 /* Device interface */
3098 DEVMETHOD(device_probe, intel_ntb_probe),
3099 DEVMETHOD(device_attach, intel_ntb_attach),
3100 DEVMETHOD(device_detach, intel_ntb_detach),
3102 DEVMETHOD(ntb_link_is_up, intel_ntb_link_is_up),
3103 DEVMETHOD(ntb_link_enable, intel_ntb_link_enable),
3104 DEVMETHOD(ntb_link_disable, intel_ntb_link_disable),
3105 DEVMETHOD(ntb_link_enabled, intel_ntb_link_enabled),
3106 DEVMETHOD(ntb_mw_count, intel_ntb_mw_count),
3107 DEVMETHOD(ntb_mw_get_range, intel_ntb_mw_get_range),
3108 DEVMETHOD(ntb_mw_set_trans, intel_ntb_mw_set_trans),
3109 DEVMETHOD(ntb_mw_clear_trans, intel_ntb_mw_clear_trans),
3110 DEVMETHOD(ntb_mw_get_wc, intel_ntb_mw_get_wc),
3111 DEVMETHOD(ntb_mw_set_wc, intel_ntb_mw_set_wc),
3112 DEVMETHOD(ntb_spad_count, intel_ntb_spad_count),
3113 DEVMETHOD(ntb_spad_clear, intel_ntb_spad_clear),
3114 DEVMETHOD(ntb_spad_write, intel_ntb_spad_write),
3115 DEVMETHOD(ntb_spad_read, intel_ntb_spad_read),
3116 DEVMETHOD(ntb_peer_spad_write, intel_ntb_peer_spad_write),
3117 DEVMETHOD(ntb_peer_spad_read, intel_ntb_peer_spad_read),
3118 DEVMETHOD(ntb_db_valid_mask, intel_ntb_db_valid_mask),
3119 DEVMETHOD(ntb_db_vector_count, intel_ntb_db_vector_count),
3120 DEVMETHOD(ntb_db_vector_mask, intel_ntb_db_vector_mask),
3121 DEVMETHOD(ntb_db_clear, intel_ntb_db_clear),
3122 DEVMETHOD(ntb_db_clear_mask, intel_ntb_db_clear_mask),
3123 DEVMETHOD(ntb_db_read, intel_ntb_db_read),
3124 DEVMETHOD(ntb_db_set_mask, intel_ntb_db_set_mask),
3125 DEVMETHOD(ntb_peer_db_addr, intel_ntb_peer_db_addr),
3126 DEVMETHOD(ntb_peer_db_set, intel_ntb_peer_db_set),
3130 static DEFINE_CLASS_0(ntb_hw, ntb_intel_driver, ntb_intel_methods,
3131 sizeof(struct ntb_softc));
3132 DRIVER_MODULE(ntb_intel, pci, ntb_intel_driver, ntb_hw_devclass, NULL, NULL);
3133 MODULE_DEPEND(ntb_intel, ntb, 1, 1, 1);
3134 MODULE_VERSION(ntb_intel, 1);