2 * Copyright (c) 2015-2016 The FreeBSD Foundation
5 * This software was developed by Andrew Turner under
6 * the sponsorship of the FreeBSD Foundation.
8 * This software was developed by Semihalf under
9 * the sponsorship of the FreeBSD Foundation.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include "opt_platform.h"
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/cpuset.h>
42 #include <sys/endian.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
45 #include <sys/module.h>
47 #include <sys/queue.h>
55 #include <machine/bus.h>
56 #include <machine/intr.h>
58 #include <arm/arm/gic_common.h>
59 #include <arm64/arm64/gic_v3_reg.h>
60 #include <arm64/arm64/gic_v3_var.h>
63 #include <dev/ofw/openfirm.h>
64 #include <dev/ofw/ofw_bus.h>
65 #include <dev/ofw/ofw_bus_subr.h>
67 #include <dev/pci/pcireg.h>
68 #include <dev/pci/pcivar.h>
74 MALLOC_DEFINE(M_GICV3_ITS, "GICv3 ITS",
75 "ARM GICv3 Interrupt Translation Service");
77 #define LPI_NIRQS (64 * 1024)
79 /* The size and alignment of the command circular buffer */
80 #define ITS_CMDQ_SIZE (64 * 1024) /* Must be a multiple of 4K */
81 #define ITS_CMDQ_ALIGN (64 * 1024)
83 #define LPI_CONFTAB_SIZE LPI_NIRQS
84 #define LPI_CONFTAB_ALIGN (64 * 1024)
85 #define LPI_CONFTAB_MAX_ADDR ((1ul << 48) - 1) /* We need a 47 bit PA */
87 /* 1 bit per SPI, PPI, and SGI (8k), and 1 bit per LPI (LPI_CONFTAB_SIZE) */
88 #define LPI_PENDTAB_SIZE ((LPI_NIRQS + GIC_FIRST_LPI) / 8)
89 #define LPI_PENDTAB_ALIGN (64 * 1024)
90 #define LPI_PENDTAB_MAX_ADDR ((1ul << 48) - 1) /* We need a 47 bit PA */
92 #define LPI_INT_TRANS_TAB_ALIGN 256
93 #define LPI_INT_TRANS_TAB_MAX_ADDR ((1ul << 48) - 1)
95 /* ITS commands encoding */
96 #define ITS_CMD_MOVI (0x01)
97 #define ITS_CMD_SYNC (0x05)
98 #define ITS_CMD_MAPD (0x08)
99 #define ITS_CMD_MAPC (0x09)
100 #define ITS_CMD_MAPTI (0x0a)
101 #define ITS_CMD_MAPI (0x0b)
102 #define ITS_CMD_INV (0x0c)
103 #define ITS_CMD_INVALL (0x0d)
105 #define CMD_COMMAND_MASK (0xFFUL)
107 #define CMD_DEVID_SHIFT (32)
108 #define CMD_DEVID_MASK (0xFFFFFFFFUL << CMD_DEVID_SHIFT)
109 /* Size of IRQ ID bitfield */
110 #define CMD_SIZE_MASK (0xFFUL)
112 #define CMD_ID_MASK (0xFFFFFFFFUL)
113 /* Physical LPI ID */
114 #define CMD_PID_SHIFT (32)
115 #define CMD_PID_MASK (0xFFFFFFFFUL << CMD_PID_SHIFT)
117 #define CMD_COL_MASK (0xFFFFUL)
118 /* Target (CPU or Re-Distributor) */
119 #define CMD_TARGET_SHIFT (16)
120 #define CMD_TARGET_MASK (0xFFFFFFFFUL << CMD_TARGET_SHIFT)
121 /* Interrupt Translation Table address */
122 #define CMD_ITT_MASK (0xFFFFFFFFFF00UL)
123 /* Valid command bit */
124 #define CMD_VALID_SHIFT (63)
125 #define CMD_VALID_MASK (1UL << CMD_VALID_SHIFT)
127 #define ITS_TARGET_NONE 0xFBADBEEF
129 /* LPI chunk owned by ITS device */
132 u_int lpi_free; /* First free LPI in set */
133 u_int lpi_num; /* Total number of LPIs in chunk */
134 u_int lpi_busy; /* Number of busy LPIs in chink */
139 TAILQ_ENTRY(its_dev) entry;
142 /* Device ID (i.e. PCI device ID) */
144 /* List of assigned LPIs */
145 struct lpi_chunk lpis;
146 /* Virtual address of ITT */
152 * ITS command descriptor.
153 * Idea for command description passing taken from Linux.
155 struct its_cmd_desc {
160 struct its_dev *its_dev;
175 struct its_dev *its_dev;
182 struct its_dev *its_dev;
188 struct its_dev *its_dev;
193 struct its_dev *its_dev;
204 /* ITS command. Each command is 32 bytes long */
206 uint64_t cmd_dword[4]; /* ITS command double word */
209 /* An ITS private table */
211 vm_offset_t ptab_vaddr;
212 unsigned long ptab_size;
215 /* ITS collection description. */
217 uint64_t col_target; /* Target Re-Distributor */
218 uint64_t col_id; /* Collection ID */
221 struct gicv3_its_irqsrc {
222 struct intr_irqsrc gi_isrc;
224 struct its_dev *gi_its_dev;
227 struct gicv3_its_softc {
228 struct intr_pic *sc_pic;
229 struct resource *sc_its_res;
231 struct its_ptable sc_its_ptab[GITS_BASER_NUM];
232 struct its_col *sc_its_cols[MAXCPU]; /* Per-CPU collections */
235 * TODO: We should get these from the parent as we only want a
236 * single copy of each across the interrupt controller.
238 vm_offset_t sc_conf_base;
239 vm_offset_t sc_pend_base[MAXCPU];
241 /* Command handling */
242 struct mtx sc_its_cmd_lock;
243 struct its_cmd *sc_its_cmd_base; /* Command circular buffer address */
244 size_t sc_its_cmd_next_idx;
246 vmem_t *sc_irq_alloc;
247 struct gicv3_its_irqsrc *sc_irqs;
249 struct mtx sc_its_dev_lock;
250 TAILQ_HEAD(its_dev_list, its_dev) sc_its_dev_list;
252 #define ITS_FLAGS_CMDQ_FLUSH 0x00000001
253 #define ITS_FLAGS_LPI_CONF_FLUSH 0x00000002
254 #define ITS_FLAGS_ERRATA_CAVIUM_22375 0x00000004
258 typedef void (its_quirk_func_t)(device_t);
259 static its_quirk_func_t its_quirk_cavium_22375;
261 static const struct {
265 its_quirk_func_t *func;
268 /* Cavium ThunderX Pass 1.x */
269 .desc = "Cavoum ThunderX errata: 22375, 24313",
270 .iidr = GITS_IIDR_RAW(GITS_IIDR_IMPL_CAVIUM,
271 GITS_IIDR_PROD_THUNDER, GITS_IIDR_VAR_THUNDER_1, 0),
272 .iidr_mask = ~GITS_IIDR_REVISION_MASK,
273 .func = its_quirk_cavium_22375,
277 static u_int gic_irq_cpu;
279 #define gic_its_read_4(sc, reg) \
280 bus_read_4((sc)->sc_its_res, (reg))
281 #define gic_its_read_8(sc, reg) \
282 bus_read_8((sc)->sc_its_res, (reg))
284 #define gic_its_write_4(sc, reg, val) \
285 bus_write_4((sc)->sc_its_res, (reg), (val))
286 #define gic_its_write_8(sc, reg, val) \
287 bus_write_8((sc)->sc_its_res, (reg), (val))
289 static device_attach_t gicv3_its_attach;
290 static device_detach_t gicv3_its_detach;
292 static pic_disable_intr_t gicv3_its_disable_intr;
293 static pic_enable_intr_t gicv3_its_enable_intr;
294 static pic_map_intr_t gicv3_its_map_intr;
295 static pic_setup_intr_t gicv3_its_setup_intr;
296 static pic_post_filter_t gicv3_its_post_filter;
297 static pic_post_ithread_t gicv3_its_post_ithread;
298 static pic_pre_ithread_t gicv3_its_pre_ithread;
299 static pic_bind_intr_t gicv3_its_bind_intr;
301 static pic_init_secondary_t gicv3_its_init_secondary;
303 static msi_alloc_msi_t gicv3_its_alloc_msi;
304 static msi_release_msi_t gicv3_its_release_msi;
305 static msi_alloc_msix_t gicv3_its_alloc_msix;
306 static msi_release_msix_t gicv3_its_release_msix;
307 static msi_map_msi_t gicv3_its_map_msi;
309 static void its_cmd_movi(device_t, struct gicv3_its_irqsrc *);
310 static void its_cmd_mapc(device_t, struct its_col *, uint8_t);
311 static void its_cmd_mapti(device_t, struct gicv3_its_irqsrc *);
312 static void its_cmd_mapd(device_t, struct its_dev *, uint8_t);
313 static void its_cmd_inv(device_t, struct its_dev *, struct gicv3_its_irqsrc *);
314 static void its_cmd_invall(device_t, struct its_col *);
316 static device_method_t gicv3_its_methods[] = {
317 /* Device interface */
318 DEVMETHOD(device_detach, gicv3_its_detach),
320 /* Interrupt controller interface */
321 DEVMETHOD(pic_disable_intr, gicv3_its_disable_intr),
322 DEVMETHOD(pic_enable_intr, gicv3_its_enable_intr),
323 DEVMETHOD(pic_map_intr, gicv3_its_map_intr),
324 DEVMETHOD(pic_setup_intr, gicv3_its_setup_intr),
325 DEVMETHOD(pic_post_filter, gicv3_its_post_filter),
326 DEVMETHOD(pic_post_ithread, gicv3_its_post_ithread),
327 DEVMETHOD(pic_pre_ithread, gicv3_its_pre_ithread),
329 DEVMETHOD(pic_bind_intr, gicv3_its_bind_intr),
330 DEVMETHOD(pic_init_secondary, gicv3_its_init_secondary),
334 DEVMETHOD(msi_alloc_msi, gicv3_its_alloc_msi),
335 DEVMETHOD(msi_release_msi, gicv3_its_release_msi),
336 DEVMETHOD(msi_alloc_msix, gicv3_its_alloc_msix),
337 DEVMETHOD(msi_release_msix, gicv3_its_release_msix),
338 DEVMETHOD(msi_map_msi, gicv3_its_map_msi),
344 static DEFINE_CLASS_0(gic, gicv3_its_driver, gicv3_its_methods,
345 sizeof(struct gicv3_its_softc));
348 gicv3_its_cmdq_init(struct gicv3_its_softc *sc)
350 vm_paddr_t cmd_paddr;
353 /* Set up the command circular buffer */
354 sc->sc_its_cmd_base = contigmalloc(ITS_CMDQ_SIZE, M_GICV3_ITS,
355 M_WAITOK | M_ZERO, 0, (1ul << 48) - 1, ITS_CMDQ_ALIGN, 0);
356 sc->sc_its_cmd_next_idx = 0;
358 cmd_paddr = vtophys(sc->sc_its_cmd_base);
360 /* Set the base of the command buffer */
361 reg = GITS_CBASER_VALID |
362 (GITS_CBASER_CACHE_NIWAWB << GITS_CBASER_CACHE_SHIFT) |
363 cmd_paddr | (GITS_CBASER_SHARE_IS << GITS_CBASER_SHARE_SHIFT) |
364 (ITS_CMDQ_SIZE / 4096 - 1);
365 gic_its_write_8(sc, GITS_CBASER, reg);
367 /* Read back to check for fixed value fields */
368 tmp = gic_its_read_8(sc, GITS_CBASER);
370 if ((tmp & GITS_CBASER_SHARE_MASK) !=
371 (GITS_CBASER_SHARE_IS << GITS_CBASER_SHARE_SHIFT)) {
372 /* Check if the hardware reported non-shareable */
373 if ((tmp & GITS_CBASER_SHARE_MASK) ==
374 (GITS_CBASER_SHARE_NS << GITS_CBASER_SHARE_SHIFT)) {
375 /* If so remove the cache attribute */
376 reg &= ~GITS_CBASER_CACHE_MASK;
377 reg &= ~GITS_CBASER_SHARE_MASK;
378 /* Set to Non-cacheable, Non-shareable */
379 reg |= GITS_CBASER_CACHE_NIN << GITS_CBASER_CACHE_SHIFT;
380 reg |= GITS_CBASER_SHARE_NS << GITS_CBASER_SHARE_SHIFT;
382 gic_its_write_8(sc, GITS_CBASER, reg);
385 /* The command queue has to be flushed after each command */
386 sc->sc_its_flags |= ITS_FLAGS_CMDQ_FLUSH;
389 /* Get the next command from the start of the buffer */
390 gic_its_write_8(sc, GITS_CWRITER, 0x0);
394 gicv3_its_table_init(device_t dev, struct gicv3_its_softc *sc)
398 uint64_t cache, reg, share, tmp, type;
399 size_t esize, its_tbl_size, nidents, nitspages, npages;
403 if ((sc->sc_its_flags & ITS_FLAGS_ERRATA_CAVIUM_22375) != 0) {
405 * GITS_TYPER[17:13] of ThunderX reports that device IDs
406 * are to be 21 bits in length. The entry size of the ITS
407 * table can be read from GITS_BASERn[52:48] and on ThunderX
408 * is supposed to be 8 bytes in length (for device table).
409 * Finally the page size that is to be used by ITS to access
410 * this table will be set to 64KB.
412 * This gives 0x200000 entries of size 0x8 bytes covered by
413 * 256 pages each of which 64KB in size. The number of pages
414 * (minus 1) should then be written to GITS_BASERn[7:0]. In
415 * that case this value would be 0xFF but on ThunderX the
416 * maximum value that HW accepts is 0xFD.
418 * Set an arbitrary number of device ID bits to 20 in order
419 * to limit the number of entries in ITS device table to
420 * 0x100000 and the table size to 8MB.
425 devbits = GITS_TYPER_DEVB(gic_its_read_8(sc, GITS_TYPER));
426 cache = GITS_BASER_CACHE_WAWB;
428 share = GITS_BASER_SHARE_IS;
429 page_size = PAGE_SIZE_64K;
431 for (i = 0; i < GITS_BASER_NUM; i++) {
432 reg = gic_its_read_8(sc, GITS_BASER(i));
433 /* The type of table */
434 type = GITS_BASER_TYPE(reg);
435 /* The table entry size */
436 esize = GITS_BASER_ESIZE(reg);
439 case GITS_BASER_TYPE_DEV:
440 nidents = (1 << devbits);
441 its_tbl_size = esize * nidents;
442 its_tbl_size = roundup2(its_tbl_size, PAGE_SIZE_64K);
444 case GITS_BASER_TYPE_VP:
445 case GITS_BASER_TYPE_PP: /* Undocumented? */
446 case GITS_BASER_TYPE_IC:
447 its_tbl_size = page_size;
452 npages = howmany(its_tbl_size, PAGE_SIZE);
454 /* Allocate the table */
455 table = (vm_offset_t)contigmalloc(npages * PAGE_SIZE,
456 M_GICV3_ITS, M_WAITOK | M_ZERO, 0, (1ul << 48) - 1,
459 sc->sc_its_ptab[i].ptab_vaddr = table;
460 sc->sc_its_ptab[i].ptab_size = npages * PAGE_SIZE;
462 paddr = vtophys(table);
465 nitspages = howmany(its_tbl_size, page_size);
467 /* Clear the fields we will be setting */
468 reg &= ~(GITS_BASER_VALID |
469 GITS_BASER_CACHE_MASK | GITS_BASER_TYPE_MASK |
470 GITS_BASER_ESIZE_MASK | GITS_BASER_PA_MASK |
471 GITS_BASER_SHARE_MASK | GITS_BASER_PSZ_MASK |
472 GITS_BASER_SIZE_MASK);
473 /* Set the new values */
474 reg |= GITS_BASER_VALID |
475 (cache << GITS_BASER_CACHE_SHIFT) |
476 (type << GITS_BASER_TYPE_SHIFT) |
477 ((esize - 1) << GITS_BASER_ESIZE_SHIFT) |
478 paddr | (share << GITS_BASER_SHARE_SHIFT) |
482 case PAGE_SIZE: /* 4KB */
484 GITS_BASER_PSZ_4K << GITS_BASER_PSZ_SHIFT;
486 case PAGE_SIZE_16K: /* 16KB */
488 GITS_BASER_PSZ_4K << GITS_BASER_PSZ_SHIFT;
490 case PAGE_SIZE_64K: /* 64KB */
492 GITS_BASER_PSZ_64K << GITS_BASER_PSZ_SHIFT;
496 gic_its_write_8(sc, GITS_BASER(i), reg);
498 /* Read back to check */
499 tmp = gic_its_read_8(sc, GITS_BASER(i));
501 /* Do the snareability masks line up? */
502 if ((tmp & GITS_BASER_SHARE_MASK) !=
503 (reg & GITS_BASER_SHARE_MASK)) {
504 share = (tmp & GITS_BASER_SHARE_MASK) >>
505 GITS_BASER_SHARE_SHIFT;
509 if ((tmp & GITS_BASER_PSZ_MASK) !=
510 (reg & GITS_BASER_PSZ_MASK)) {
513 page_size = PAGE_SIZE;
516 page_size = PAGE_SIZE_16K;
522 device_printf(dev, "GITS_BASER%d: "
523 "unable to be updated: %lx != %lx\n",
528 /* We should have made all needed changes */
537 gicv3_its_conftable_init(struct gicv3_its_softc *sc)
540 sc->sc_conf_base = (vm_offset_t)contigmalloc(LPI_CONFTAB_SIZE,
541 M_GICV3_ITS, M_WAITOK, 0, LPI_CONFTAB_MAX_ADDR, LPI_CONFTAB_ALIGN,
544 /* Set the default configuration */
545 memset((void *)sc->sc_conf_base, GIC_PRIORITY_MAX | LPI_CONF_GROUP1,
548 /* Flush the table to memory */
549 cpu_dcache_wb_range(sc->sc_conf_base, LPI_CONFTAB_SIZE);
553 gicv3_its_pendtables_init(struct gicv3_its_softc *sc)
557 for (i = 0; i < mp_ncpus; i++) {
558 if (CPU_ISSET(i, &all_cpus) == 0)
561 sc->sc_pend_base[i] = (vm_offset_t)contigmalloc(
562 LPI_PENDTAB_SIZE, M_GICV3_ITS, M_WAITOK | M_ZERO,
563 0, LPI_PENDTAB_MAX_ADDR, LPI_PENDTAB_ALIGN, 0);
565 /* Flush so the ITS can see the memory */
566 cpu_dcache_wb_range((vm_offset_t)sc->sc_pend_base,
572 its_init_cpu(device_t dev, struct gicv3_its_softc *sc)
576 uint64_t xbaser, tmp;
580 gicv3 = device_get_parent(dev);
581 cpuid = PCPU_GET(cpuid);
583 /* Check if the ITS is enabled on this CPU */
584 if ((gic_r_read_4(gicv3, GICR_TYPER) & GICR_TYPER_PLPIS) == 0) {
589 ctlr = gic_r_read_4(gicv3, GICR_CTLR);
590 ctlr &= ~GICR_CTLR_LPI_ENABLE;
591 gic_r_write_4(gicv3, GICR_CTLR, ctlr);
593 /* Make sure changes are observable my the GIC */
597 * Set the redistributor base
599 xbaser = vtophys(sc->sc_conf_base) |
600 (GICR_PROPBASER_SHARE_IS << GICR_PROPBASER_SHARE_SHIFT) |
601 (GICR_PROPBASER_CACHE_NIWAWB << GICR_PROPBASER_CACHE_SHIFT) |
602 (flsl(LPI_CONFTAB_SIZE | GIC_FIRST_LPI) - 1);
603 gic_r_write_8(gicv3, GICR_PROPBASER, xbaser);
605 /* Check the cache attributes we set */
606 tmp = gic_r_read_8(gicv3, GICR_PROPBASER);
608 if ((tmp & GICR_PROPBASER_SHARE_MASK) !=
609 (xbaser & GICR_PROPBASER_SHARE_MASK)) {
610 if ((tmp & GICR_PROPBASER_SHARE_MASK) ==
611 (GICR_PROPBASER_SHARE_NS << GICR_PROPBASER_SHARE_SHIFT)) {
612 /* We need to mark as non-cacheable */
613 xbaser &= ~(GICR_PROPBASER_SHARE_MASK |
614 GICR_PROPBASER_CACHE_MASK);
616 xbaser |= GICR_PROPBASER_CACHE_NIN <<
617 GICR_PROPBASER_CACHE_SHIFT;
619 xbaser |= GICR_PROPBASER_SHARE_NS <<
620 GICR_PROPBASER_SHARE_SHIFT;
621 gic_r_write_8(gicv3, GICR_PROPBASER, xbaser);
623 sc->sc_its_flags |= ITS_FLAGS_LPI_CONF_FLUSH;
627 * Set the LPI pending table base
629 xbaser = vtophys(sc->sc_pend_base[cpuid]) |
630 (GICR_PENDBASER_CACHE_NIWAWB << GICR_PENDBASER_CACHE_SHIFT) |
631 (GICR_PENDBASER_SHARE_IS << GICR_PENDBASER_SHARE_SHIFT);
633 gic_r_write_8(gicv3, GICR_PENDBASER, xbaser);
635 tmp = gic_r_read_8(gicv3, GICR_PENDBASER);
637 if ((tmp & GICR_PENDBASER_SHARE_MASK) ==
638 (GICR_PENDBASER_SHARE_NS << GICR_PENDBASER_SHARE_SHIFT)) {
639 /* Clear the cahce and shareability bits */
640 xbaser &= ~(GICR_PENDBASER_CACHE_MASK |
641 GICR_PENDBASER_SHARE_MASK);
642 /* Mark as non-shareable */
643 xbaser |= GICR_PENDBASER_SHARE_NS << GICR_PENDBASER_SHARE_SHIFT;
644 /* And non-cacheable */
645 xbaser |= GICR_PENDBASER_CACHE_NIN <<
646 GICR_PENDBASER_CACHE_SHIFT;
650 ctlr = gic_r_read_4(gicv3, GICR_CTLR);
651 ctlr |= GICR_CTLR_LPI_ENABLE;
652 gic_r_write_4(gicv3, GICR_CTLR, ctlr);
654 /* Make sure the GIC has seen everything */
657 if ((gic_its_read_8(sc, GITS_TYPER) & GITS_TYPER_PTA) != 0) {
658 /* This ITS wants the redistributor physical address */
659 target = vtophys(gicv3_get_redist_vaddr(dev));
661 /* This ITS wants the unique processor number */
662 target = GICR_TYPER_CPUNUM(gic_r_read_8(gicv3, GICR_TYPER));
665 sc->sc_its_cols[cpuid]->col_target = target;
666 sc->sc_its_cols[cpuid]->col_id = cpuid;
668 its_cmd_mapc(dev, sc->sc_its_cols[cpuid], 1);
669 its_cmd_invall(dev, sc->sc_its_cols[cpuid]);
675 gicv3_its_attach(device_t dev)
677 struct gicv3_its_softc *sc;
682 sc = device_get_softc(dev);
685 sc->sc_its_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
687 if (sc->sc_its_res == NULL) {
688 device_printf(dev, "Could not allocate memory\n");
692 iidr = gic_its_read_4(sc, GITS_IIDR);
693 for (i = 0; i < nitems(its_quirks); i++) {
694 if ((iidr & its_quirks[i].iidr_mask) == its_quirks[i].iidr) {
696 device_printf(dev, "Applying %s\n",
699 its_quirks[i].func(dev);
704 /* Allocate the private tables */
705 err = gicv3_its_table_init(dev, sc);
709 /* Protects access to the device list */
710 mtx_init(&sc->sc_its_dev_lock, "ITS device lock", NULL, MTX_SPIN);
712 /* Protects access to the ITS command circular buffer. */
713 mtx_init(&sc->sc_its_cmd_lock, "ITS cmd lock", NULL, MTX_SPIN);
715 /* Allocate the command circular buffer */
716 gicv3_its_cmdq_init(sc);
718 /* Allocate the per-CPU collections */
719 for (int cpu = 0; cpu < mp_ncpus; cpu++)
720 if (CPU_ISSET(cpu, &all_cpus) != 0)
721 sc->sc_its_cols[cpu] = malloc(
722 sizeof(*sc->sc_its_cols[0]), M_GICV3_ITS,
725 sc->sc_its_cols[cpu] = NULL;
728 gic_its_write_4(sc, GITS_CTLR,
729 gic_its_read_4(sc, GITS_CTLR) | GITS_CTLR_EN);
731 /* Create the LPI configuration table */
732 gicv3_its_conftable_init(sc);
734 /* And the pending tebles */
735 gicv3_its_pendtables_init(sc);
737 /* Enable LPIs on this CPU */
738 its_init_cpu(dev, sc);
740 TAILQ_INIT(&sc->sc_its_dev_list);
743 * Create the vmem object to allocate IRQs from. We try to use all
744 * IRQs not already used by the GICv3.
745 * XXX: This assumes there are no other interrupt controllers in the
748 sc->sc_irq_alloc = vmem_create("GICv3 ITS IRQs", 0,
749 NIRQ - gicv3_get_nirqs(dev), 1, 1, M_FIRSTFIT | M_WAITOK);
751 sc->sc_irqs = malloc(sizeof(*sc->sc_irqs) * LPI_NIRQS, M_GICV3_ITS,
753 name = device_get_nameunit(dev);
754 for (i = 0; i < LPI_NIRQS; i++) {
755 sc->sc_irqs[i].gi_irq = i;
756 err = intr_isrc_register(&sc->sc_irqs[i].gi_isrc, dev, 0,
764 gicv3_its_detach(device_t dev)
771 its_quirk_cavium_22375(device_t dev)
773 struct gicv3_its_softc *sc;
775 sc = device_get_softc(dev);
776 sc->sc_its_flags |= ITS_FLAGS_ERRATA_CAVIUM_22375;
780 gicv3_its_disable_intr(device_t dev, struct intr_irqsrc *isrc)
782 struct gicv3_its_softc *sc;
783 struct gicv3_its_irqsrc *girq;
786 sc = device_get_softc(dev);
787 girq = (struct gicv3_its_irqsrc *)isrc;
788 conf = (uint8_t *)sc->sc_conf_base;
790 conf[girq->gi_irq] &= ~LPI_CONF_ENABLE;
792 if ((sc->sc_its_flags & ITS_FLAGS_LPI_CONF_FLUSH) != 0) {
793 /* Clean D-cache under command. */
794 cpu_dcache_wb_range((vm_offset_t)&conf[girq->gi_irq], 1);
796 /* DSB inner shareable, store */
800 its_cmd_inv(dev, girq->gi_its_dev, girq);
804 gicv3_its_enable_intr(device_t dev, struct intr_irqsrc *isrc)
806 struct gicv3_its_softc *sc;
807 struct gicv3_its_irqsrc *girq;
810 sc = device_get_softc(dev);
811 girq = (struct gicv3_its_irqsrc *)isrc;
812 conf = (uint8_t *)sc->sc_conf_base;
814 conf[girq->gi_irq] |= LPI_CONF_ENABLE;
816 if ((sc->sc_its_flags & ITS_FLAGS_LPI_CONF_FLUSH) != 0) {
817 /* Clean D-cache under command. */
818 cpu_dcache_wb_range((vm_offset_t)&conf[girq->gi_irq], 1);
820 /* DSB inner shareable, store */
824 its_cmd_inv(dev, girq->gi_its_dev, girq);
828 gicv3_its_intr(void *arg, uintptr_t irq)
830 struct gicv3_its_softc *sc = arg;
831 struct gicv3_its_irqsrc *girq;
832 struct trapframe *tf;
834 irq -= GIC_FIRST_LPI;
835 girq = &sc->sc_irqs[irq];
837 panic("gicv3_its_intr: Invalid interrupt %ld",
838 irq + GIC_FIRST_LPI);
840 tf = curthread->td_intr_frame;
841 intr_isrc_dispatch(&girq->gi_isrc, tf);
842 return (FILTER_HANDLED);
846 gicv3_its_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
848 struct gicv3_its_irqsrc *girq;
850 girq = (struct gicv3_its_irqsrc *)isrc;
851 gicv3_its_disable_intr(dev, isrc);
852 gic_icc_write(EOIR1, girq->gi_irq + GIC_FIRST_LPI);
856 gicv3_its_post_ithread(device_t dev, struct intr_irqsrc *isrc)
859 gicv3_its_enable_intr(dev, isrc);
863 gicv3_its_post_filter(device_t dev, struct intr_irqsrc *isrc)
865 struct gicv3_its_irqsrc *girq;
867 girq = (struct gicv3_its_irqsrc *)isrc;
868 gic_icc_write(EOIR1, girq->gi_irq + GIC_FIRST_LPI);
872 gicv3_its_bind_intr(device_t dev, struct intr_irqsrc *isrc)
874 struct gicv3_its_irqsrc *girq;
876 girq = (struct gicv3_its_irqsrc *)isrc;
877 if (CPU_EMPTY(&isrc->isrc_cpu)) {
878 gic_irq_cpu = intr_irq_next_cpu(gic_irq_cpu, &all_cpus);
879 CPU_SETOF(gic_irq_cpu, &isrc->isrc_cpu);
882 its_cmd_movi(dev, girq);
888 gicv3_its_map_intr(device_t dev, struct intr_map_data *data,
889 struct intr_irqsrc **isrcp)
893 * This should never happen, we only call this function to map
894 * interrupts found before the controller driver is ready.
896 panic("gicv3_its_map_intr: Unable to map a MSI interrupt");
900 gicv3_its_setup_intr(device_t dev, struct intr_irqsrc *isrc,
901 struct resource *res, struct intr_map_data *data)
904 /* Bind the interrupt to a CPU */
905 gicv3_its_bind_intr(dev, isrc);
912 gicv3_its_init_secondary(device_t dev)
914 struct gicv3_its_softc *sc;
916 sc = device_get_softc(dev);
919 * This is fatal as otherwise we may bind interrupts to this CPU.
920 * We need a way to tell the interrupt framework to only bind to a
921 * subset of given CPUs when it performs the shuffle.
923 if (its_init_cpu(dev, sc) != 0)
924 panic("gicv3_its_init_secondary: No usable ITS on CPU%d",
930 its_get_devid(device_t pci_dev)
934 if (pci_get_id(pci_dev, PCI_ID_MSI, &id) != 0)
935 panic("its_get_devid: Unable to get the MSI DeviceID");
940 static struct its_dev *
941 its_device_find(device_t dev, device_t child)
943 struct gicv3_its_softc *sc;
944 struct its_dev *its_dev = NULL;
946 sc = device_get_softc(dev);
948 mtx_lock_spin(&sc->sc_its_dev_lock);
949 TAILQ_FOREACH(its_dev, &sc->sc_its_dev_list, entry) {
950 if (its_dev->pci_dev == child)
953 mtx_unlock_spin(&sc->sc_its_dev_lock);
958 static struct its_dev *
959 its_device_get(device_t dev, device_t child, u_int nvecs)
961 struct gicv3_its_softc *sc;
962 struct its_dev *its_dev;
963 vmem_addr_t irq_base;
966 sc = device_get_softc(dev);
968 its_dev = its_device_find(dev, child);
972 its_dev = malloc(sizeof(*its_dev), M_GICV3_ITS, M_NOWAIT | M_ZERO);
976 its_dev->pci_dev = child;
977 its_dev->devid = its_get_devid(child);
979 its_dev->lpis.lpi_busy = 0;
980 its_dev->lpis.lpi_num = nvecs;
981 its_dev->lpis.lpi_free = nvecs;
983 if (vmem_alloc(sc->sc_irq_alloc, nvecs, M_FIRSTFIT | M_NOWAIT,
985 free(its_dev, M_GICV3_ITS);
988 its_dev->lpis.lpi_base = irq_base;
990 /* Get ITT entry size */
991 esize = GITS_TYPER_ITTES(gic_its_read_8(sc, GITS_TYPER));
994 * Allocate ITT for this device.
995 * PA has to be 256 B aligned. At least two entries for device.
997 its_dev->itt_size = roundup2(MAX(nvecs, 2) * esize, 256);
998 its_dev->itt = (vm_offset_t)contigmalloc(its_dev->itt_size,
999 M_GICV3_ITS, M_NOWAIT | M_ZERO, 0, LPI_INT_TRANS_TAB_MAX_ADDR,
1000 LPI_INT_TRANS_TAB_ALIGN, 0);
1001 if (its_dev->itt == 0) {
1002 vmem_free(sc->sc_irq_alloc, its_dev->lpis.lpi_base, nvecs);
1003 free(its_dev, M_GICV3_ITS);
1007 mtx_lock_spin(&sc->sc_its_dev_lock);
1008 TAILQ_INSERT_TAIL(&sc->sc_its_dev_list, its_dev, entry);
1009 mtx_unlock_spin(&sc->sc_its_dev_lock);
1011 /* Map device to its ITT */
1012 its_cmd_mapd(dev, its_dev, 1);
1018 its_device_release(device_t dev, struct its_dev *its_dev)
1020 struct gicv3_its_softc *sc;
1022 KASSERT(its_dev->lpis.lpi_busy == 0,
1023 ("its_device_release: Trying to release an inuse ITS device"));
1025 /* Unmap device in ITS */
1026 its_cmd_mapd(dev, its_dev, 0);
1028 sc = device_get_softc(dev);
1030 /* Remove the device from the list of devices */
1031 mtx_lock_spin(&sc->sc_its_dev_lock);
1032 TAILQ_REMOVE(&sc->sc_its_dev_list, its_dev, entry);
1033 mtx_unlock_spin(&sc->sc_its_dev_lock);
1036 KASSERT(its_dev->itt != 0, ("Invalid ITT in valid ITS device"));
1037 contigfree((void *)its_dev->itt, its_dev->itt_size, M_GICV3_ITS);
1039 /* Free the IRQ allocation */
1040 vmem_free(sc->sc_irq_alloc, its_dev->lpis.lpi_base,
1041 its_dev->lpis.lpi_num);
1043 free(its_dev, M_GICV3_ITS);
1047 gicv3_its_alloc_msi(device_t dev, device_t child, int count, int maxcount,
1048 device_t *pic, struct intr_irqsrc **srcs)
1050 struct gicv3_its_softc *sc;
1051 struct gicv3_its_irqsrc *girq;
1052 struct its_dev *its_dev;
1056 its_dev = its_device_get(dev, child, count);
1057 if (its_dev == NULL)
1060 KASSERT(its_dev->lpis.lpi_free >= count,
1061 ("gicv3_its_alloc_msi: No free LPIs"));
1062 sc = device_get_softc(dev);
1063 irq = its_dev->lpis.lpi_base + its_dev->lpis.lpi_num -
1064 its_dev->lpis.lpi_free;
1065 for (i = 0; i < count; i++, irq++) {
1066 its_dev->lpis.lpi_free--;
1067 girq = &sc->sc_irqs[irq];
1068 girq->gi_its_dev = its_dev;
1069 srcs[i] = (struct intr_irqsrc *)girq;
1071 its_dev->lpis.lpi_busy += count;
1078 gicv3_its_release_msi(device_t dev, device_t child, int count,
1079 struct intr_irqsrc **isrc)
1081 struct gicv3_its_softc *sc;
1082 struct gicv3_its_irqsrc *girq;
1083 struct its_dev *its_dev;
1086 sc = device_get_softc(dev);
1087 its_dev = its_device_find(dev, child);
1089 KASSERT(its_dev != NULL,
1090 ("gicv3_its_release_msi: Releasing a MSI interrupt with "
1092 KASSERT(its_dev->lpis.lpi_busy >= count,
1093 ("gicv3_its_release_msi: Releasing more interrupts than "
1094 "were allocated: releasing %d, allocated %d", count,
1095 its_dev->lpis.lpi_busy));
1096 for (i = 0; i < count; i++) {
1097 girq = (struct gicv3_its_irqsrc *)isrc[i];
1098 girq->gi_its_dev = NULL;
1100 its_dev->lpis.lpi_busy -= count;
1102 if (its_dev->lpis.lpi_busy == 0)
1103 its_device_release(dev, its_dev);
1109 gicv3_its_alloc_msix(device_t dev, device_t child, device_t *pic,
1110 struct intr_irqsrc **isrcp)
1112 struct gicv3_its_softc *sc;
1113 struct gicv3_its_irqsrc *girq;
1114 struct its_dev *its_dev;
1117 nvecs = pci_msix_count(child);
1118 its_dev = its_device_get(dev, child, nvecs);
1119 if (its_dev == NULL)
1122 KASSERT(its_dev->lpis.lpi_free > 0,
1123 ("gicv3_its_alloc_msix: No free LPIs"));
1124 sc = device_get_softc(dev);
1125 irq = its_dev->lpis.lpi_base + its_dev->lpis.lpi_num -
1126 its_dev->lpis.lpi_free;
1127 its_dev->lpis.lpi_free--;
1128 its_dev->lpis.lpi_busy++;
1129 girq = &sc->sc_irqs[irq];
1130 girq->gi_its_dev = its_dev;
1133 *isrcp = (struct intr_irqsrc *)girq;
1139 gicv3_its_release_msix(device_t dev, device_t child, struct intr_irqsrc *isrc)
1141 struct gicv3_its_softc *sc;
1142 struct gicv3_its_irqsrc *girq;
1143 struct its_dev *its_dev;
1145 sc = device_get_softc(dev);
1146 its_dev = its_device_find(dev, child);
1148 KASSERT(its_dev != NULL,
1149 ("gicv3_its_release_msix: Releasing a MSI-X interrupt with "
1151 KASSERT(its_dev->lpis.lpi_busy > 0,
1152 ("gicv3_its_release_msix: Releasing more interrupts than "
1153 "were allocated: allocated %d", its_dev->lpis.lpi_busy));
1154 girq = (struct gicv3_its_irqsrc *)isrc;
1155 girq->gi_its_dev = NULL;
1156 its_dev->lpis.lpi_busy--;
1158 if (its_dev->lpis.lpi_busy == 0)
1159 its_device_release(dev, its_dev);
1165 gicv3_its_map_msi(device_t dev, device_t child, struct intr_irqsrc *isrc,
1166 uint64_t *addr, uint32_t *data)
1168 struct gicv3_its_softc *sc;
1169 struct gicv3_its_irqsrc *girq;
1171 sc = device_get_softc(dev);
1172 girq = (struct gicv3_its_irqsrc *)isrc;
1174 /* Map the message to the given IRQ */
1175 its_cmd_mapti(dev, girq);
1177 *addr = vtophys(rman_get_virtual(sc->sc_its_res)) + GITS_TRANSLATER;
1178 *data = girq->gi_irq - girq->gi_its_dev->lpis.lpi_base;
1184 * Commands handling.
1187 static __inline void
1188 cmd_format_command(struct its_cmd *cmd, uint8_t cmd_type)
1190 /* Command field: DW0 [7:0] */
1191 cmd->cmd_dword[0] &= htole64(~CMD_COMMAND_MASK);
1192 cmd->cmd_dword[0] |= htole64(cmd_type);
1195 static __inline void
1196 cmd_format_devid(struct its_cmd *cmd, uint32_t devid)
1198 /* Device ID field: DW0 [63:32] */
1199 cmd->cmd_dword[0] &= htole64(~CMD_DEVID_MASK);
1200 cmd->cmd_dword[0] |= htole64((uint64_t)devid << CMD_DEVID_SHIFT);
1203 static __inline void
1204 cmd_format_size(struct its_cmd *cmd, uint16_t size)
1206 /* Size field: DW1 [4:0] */
1207 cmd->cmd_dword[1] &= htole64(~CMD_SIZE_MASK);
1208 cmd->cmd_dword[1] |= htole64((size & CMD_SIZE_MASK));
1211 static __inline void
1212 cmd_format_id(struct its_cmd *cmd, uint32_t id)
1214 /* ID field: DW1 [31:0] */
1215 cmd->cmd_dword[1] &= htole64(~CMD_ID_MASK);
1216 cmd->cmd_dword[1] |= htole64(id);
1219 static __inline void
1220 cmd_format_pid(struct its_cmd *cmd, uint32_t pid)
1222 /* Physical ID field: DW1 [63:32] */
1223 cmd->cmd_dword[1] &= htole64(~CMD_PID_MASK);
1224 cmd->cmd_dword[1] |= htole64((uint64_t)pid << CMD_PID_SHIFT);
1227 static __inline void
1228 cmd_format_col(struct its_cmd *cmd, uint16_t col_id)
1230 /* Collection field: DW2 [16:0] */
1231 cmd->cmd_dword[2] &= htole64(~CMD_COL_MASK);
1232 cmd->cmd_dword[2] |= htole64(col_id);
1235 static __inline void
1236 cmd_format_target(struct its_cmd *cmd, uint64_t target)
1238 /* Target Address field: DW2 [47:16] */
1239 cmd->cmd_dword[2] &= htole64(~CMD_TARGET_MASK);
1240 cmd->cmd_dword[2] |= htole64(target & CMD_TARGET_MASK);
1243 static __inline void
1244 cmd_format_itt(struct its_cmd *cmd, uint64_t itt)
1246 /* ITT Address field: DW2 [47:8] */
1247 cmd->cmd_dword[2] &= htole64(~CMD_ITT_MASK);
1248 cmd->cmd_dword[2] |= htole64(itt & CMD_ITT_MASK);
1251 static __inline void
1252 cmd_format_valid(struct its_cmd *cmd, uint8_t valid)
1254 /* Valid field: DW2 [63] */
1255 cmd->cmd_dword[2] &= htole64(~CMD_VALID_MASK);
1256 cmd->cmd_dword[2] |= htole64((uint64_t)valid << CMD_VALID_SHIFT);
1260 its_cmd_queue_full(struct gicv3_its_softc *sc)
1262 size_t read_idx, next_write_idx;
1264 /* Get the index of the next command */
1265 next_write_idx = (sc->sc_its_cmd_next_idx + 1) %
1266 (ITS_CMDQ_SIZE / sizeof(struct its_cmd));
1267 /* And the index of the current command being read */
1268 read_idx = gic_its_read_4(sc, GITS_CREADR) / sizeof(struct its_cmd);
1271 * The queue is full when the write offset points
1272 * at the command before the current read offset.
1274 return (next_write_idx == read_idx);
1278 its_cmd_sync(struct gicv3_its_softc *sc, struct its_cmd *cmd)
1281 if ((sc->sc_its_flags & ITS_FLAGS_CMDQ_FLUSH) != 0) {
1282 /* Clean D-cache under command. */
1283 cpu_dcache_wb_range((vm_offset_t)cmd, sizeof(*cmd));
1285 /* DSB inner shareable, store */
1291 static inline uint64_t
1292 its_cmd_cwriter_offset(struct gicv3_its_softc *sc, struct its_cmd *cmd)
1296 off = (cmd - sc->sc_its_cmd_base) * sizeof(*cmd);
1302 its_cmd_wait_completion(device_t dev, struct its_cmd *cmd_first,
1303 struct its_cmd *cmd_last)
1305 struct gicv3_its_softc *sc;
1306 uint64_t first, last, read;
1309 sc = device_get_softc(dev);
1312 * XXX ARM64TODO: This is obviously a significant delay.
1313 * The reason for that is that currently the time frames for
1314 * the command to complete are not known.
1318 first = its_cmd_cwriter_offset(sc, cmd_first);
1319 last = its_cmd_cwriter_offset(sc, cmd_last);
1322 read = gic_its_read_8(sc, GITS_CREADR);
1324 if (read < first || read >= last)
1326 } else if (read < first && read >= last)
1329 if (us_left-- == 0) {
1330 /* This means timeout */
1332 "Timeout while waiting for CMD completion.\n");
1340 static struct its_cmd *
1341 its_cmd_alloc_locked(device_t dev)
1343 struct gicv3_its_softc *sc;
1344 struct its_cmd *cmd;
1347 sc = device_get_softc(dev);
1350 * XXX ARM64TODO: This is obviously a significant delay.
1351 * The reason for that is that currently the time frames for
1352 * the command to complete (and therefore free the descriptor)
1357 mtx_assert(&sc->sc_its_cmd_lock, MA_OWNED);
1358 while (its_cmd_queue_full(sc)) {
1359 if (us_left-- == 0) {
1360 /* Timeout while waiting for free command */
1362 "Timeout while waiting for free command\n");
1368 cmd = &sc->sc_its_cmd_base[sc->sc_its_cmd_next_idx];
1369 sc->sc_its_cmd_next_idx++;
1370 sc->sc_its_cmd_next_idx %= ITS_CMDQ_SIZE / sizeof(struct its_cmd);
1376 its_cmd_prepare(struct its_cmd *cmd, struct its_cmd_desc *desc)
1384 cmd_type = desc->cmd_type;
1385 target = ITS_TARGET_NONE;
1388 case ITS_CMD_MOVI: /* Move interrupt ID to another collection */
1389 target = desc->cmd_desc_movi.col->col_target;
1390 cmd_format_command(cmd, ITS_CMD_MOVI);
1391 cmd_format_id(cmd, desc->cmd_desc_movi.id);
1392 cmd_format_col(cmd, desc->cmd_desc_movi.col->col_id);
1393 cmd_format_devid(cmd, desc->cmd_desc_movi.its_dev->devid);
1395 case ITS_CMD_SYNC: /* Wait for previous commands completion */
1396 target = desc->cmd_desc_sync.col->col_target;
1397 cmd_format_command(cmd, ITS_CMD_SYNC);
1398 cmd_format_target(cmd, target);
1400 case ITS_CMD_MAPD: /* Assign ITT to device */
1401 cmd_format_command(cmd, ITS_CMD_MAPD);
1402 cmd_format_itt(cmd, vtophys(desc->cmd_desc_mapd.its_dev->itt));
1404 * Size describes number of bits to encode interrupt IDs
1405 * supported by the device minus one.
1406 * When V (valid) bit is zero, this field should be written
1409 if (desc->cmd_desc_mapd.valid != 0) {
1410 size = fls(desc->cmd_desc_mapd.its_dev->lpis.lpi_num);
1411 size = MAX(1, size) - 1;
1415 cmd_format_size(cmd, size);
1416 cmd_format_devid(cmd, desc->cmd_desc_mapd.its_dev->devid);
1417 cmd_format_valid(cmd, desc->cmd_desc_mapd.valid);
1419 case ITS_CMD_MAPC: /* Map collection to Re-Distributor */
1420 target = desc->cmd_desc_mapc.col->col_target;
1421 cmd_format_command(cmd, ITS_CMD_MAPC);
1422 cmd_format_col(cmd, desc->cmd_desc_mapc.col->col_id);
1423 cmd_format_valid(cmd, desc->cmd_desc_mapc.valid);
1424 cmd_format_target(cmd, target);
1427 target = desc->cmd_desc_mapvi.col->col_target;
1428 cmd_format_command(cmd, ITS_CMD_MAPTI);
1429 cmd_format_devid(cmd, desc->cmd_desc_mapvi.its_dev->devid);
1430 cmd_format_id(cmd, desc->cmd_desc_mapvi.id);
1431 cmd_format_pid(cmd, desc->cmd_desc_mapvi.pid);
1432 cmd_format_col(cmd, desc->cmd_desc_mapvi.col->col_id);
1435 target = desc->cmd_desc_mapi.col->col_target;
1436 cmd_format_command(cmd, ITS_CMD_MAPI);
1437 cmd_format_devid(cmd, desc->cmd_desc_mapi.its_dev->devid);
1438 cmd_format_id(cmd, desc->cmd_desc_mapi.pid);
1439 cmd_format_col(cmd, desc->cmd_desc_mapi.col->col_id);
1442 target = desc->cmd_desc_inv.col->col_target;
1443 cmd_format_command(cmd, ITS_CMD_INV);
1444 cmd_format_devid(cmd, desc->cmd_desc_inv.its_dev->devid);
1445 cmd_format_id(cmd, desc->cmd_desc_inv.pid);
1447 case ITS_CMD_INVALL:
1448 cmd_format_command(cmd, ITS_CMD_INVALL);
1449 cmd_format_col(cmd, desc->cmd_desc_invall.col->col_id);
1452 panic("its_cmd_prepare: Invalid command: %x", cmd_type);
1459 its_cmd_send(device_t dev, struct its_cmd_desc *desc)
1461 struct gicv3_its_softc *sc;
1462 struct its_cmd *cmd, *cmd_sync, *cmd_write;
1463 struct its_col col_sync;
1464 struct its_cmd_desc desc_sync;
1465 uint64_t target, cwriter;
1467 sc = device_get_softc(dev);
1468 mtx_lock_spin(&sc->sc_its_cmd_lock);
1469 cmd = its_cmd_alloc_locked(dev);
1471 device_printf(dev, "could not allocate ITS command\n");
1472 mtx_unlock_spin(&sc->sc_its_cmd_lock);
1476 target = its_cmd_prepare(cmd, desc);
1477 its_cmd_sync(sc, cmd);
1479 if (target != ITS_TARGET_NONE) {
1480 cmd_sync = its_cmd_alloc_locked(dev);
1481 if (cmd_sync != NULL) {
1482 desc_sync.cmd_type = ITS_CMD_SYNC;
1483 col_sync.col_target = target;
1484 desc_sync.cmd_desc_sync.col = &col_sync;
1485 its_cmd_prepare(cmd_sync, &desc_sync);
1486 its_cmd_sync(sc, cmd_sync);
1490 /* Update GITS_CWRITER */
1491 cwriter = sc->sc_its_cmd_next_idx * sizeof(struct its_cmd);
1492 gic_its_write_8(sc, GITS_CWRITER, cwriter);
1493 cmd_write = &sc->sc_its_cmd_base[sc->sc_its_cmd_next_idx];
1494 mtx_unlock_spin(&sc->sc_its_cmd_lock);
1496 its_cmd_wait_completion(dev, cmd, cmd_write);
1501 /* Handlers to send commands */
1503 its_cmd_movi(device_t dev, struct gicv3_its_irqsrc *girq)
1505 struct gicv3_its_softc *sc;
1506 struct its_cmd_desc desc;
1507 struct its_col *col;
1509 sc = device_get_softc(dev);
1510 col = sc->sc_its_cols[CPU_FFS(&girq->gi_isrc.isrc_cpu) - 1];
1512 desc.cmd_type = ITS_CMD_MOVI;
1513 desc.cmd_desc_movi.its_dev = girq->gi_its_dev;
1514 desc.cmd_desc_movi.col = col;
1515 desc.cmd_desc_movi.id = girq->gi_irq - girq->gi_its_dev->lpis.lpi_base;
1517 its_cmd_send(dev, &desc);
1521 its_cmd_mapc(device_t dev, struct its_col *col, uint8_t valid)
1523 struct its_cmd_desc desc;
1525 desc.cmd_type = ITS_CMD_MAPC;
1526 desc.cmd_desc_mapc.col = col;
1528 * Valid bit set - map the collection.
1529 * Valid bit cleared - unmap the collection.
1531 desc.cmd_desc_mapc.valid = valid;
1533 its_cmd_send(dev, &desc);
1537 its_cmd_mapti(device_t dev, struct gicv3_its_irqsrc *girq)
1539 struct gicv3_its_softc *sc;
1540 struct its_cmd_desc desc;
1541 struct its_col *col;
1544 sc = device_get_softc(dev);
1546 col_id = CPU_FFS(&girq->gi_isrc.isrc_cpu) - 1;
1547 col = sc->sc_its_cols[col_id];
1549 desc.cmd_type = ITS_CMD_MAPTI;
1550 desc.cmd_desc_mapvi.its_dev = girq->gi_its_dev;
1551 desc.cmd_desc_mapvi.col = col;
1552 /* The EventID sent to the device */
1553 desc.cmd_desc_mapvi.id = girq->gi_irq - girq->gi_its_dev->lpis.lpi_base;
1554 /* The physical interrupt presented to softeware */
1555 desc.cmd_desc_mapvi.pid = girq->gi_irq + GIC_FIRST_LPI;
1557 its_cmd_send(dev, &desc);
1561 its_cmd_mapd(device_t dev, struct its_dev *its_dev, uint8_t valid)
1563 struct its_cmd_desc desc;
1565 desc.cmd_type = ITS_CMD_MAPD;
1566 desc.cmd_desc_mapd.its_dev = its_dev;
1567 desc.cmd_desc_mapd.valid = valid;
1569 its_cmd_send(dev, &desc);
1573 its_cmd_inv(device_t dev, struct its_dev *its_dev,
1574 struct gicv3_its_irqsrc *girq)
1576 struct gicv3_its_softc *sc;
1577 struct its_cmd_desc desc;
1578 struct its_col *col;
1580 sc = device_get_softc(dev);
1581 col = sc->sc_its_cols[CPU_FFS(&girq->gi_isrc.isrc_cpu) - 1];
1583 desc.cmd_type = ITS_CMD_INV;
1584 /* The EventID sent to the device */
1585 desc.cmd_desc_inv.pid = girq->gi_irq - its_dev->lpis.lpi_base;
1586 desc.cmd_desc_inv.its_dev = its_dev;
1587 desc.cmd_desc_inv.col = col;
1589 its_cmd_send(dev, &desc);
1593 its_cmd_invall(device_t dev, struct its_col *col)
1595 struct its_cmd_desc desc;
1597 desc.cmd_type = ITS_CMD_INVALL;
1598 desc.cmd_desc_invall.col = col;
1600 its_cmd_send(dev, &desc);
1604 static device_probe_t gicv3_its_fdt_probe;
1605 static device_attach_t gicv3_its_fdt_attach;
1607 static device_method_t gicv3_its_fdt_methods[] = {
1608 /* Device interface */
1609 DEVMETHOD(device_probe, gicv3_its_fdt_probe),
1610 DEVMETHOD(device_attach, gicv3_its_fdt_attach),
1616 #define its_baseclasses its_fdt_baseclasses
1617 DEFINE_CLASS_1(its, gicv3_its_fdt_driver, gicv3_its_fdt_methods,
1618 sizeof(struct gicv3_its_softc), gicv3_its_driver);
1619 #undef its_baseclasses
1620 static devclass_t gicv3_its_fdt_devclass;
1622 EARLY_DRIVER_MODULE(its, gic, gicv3_its_fdt_driver,
1623 gicv3_its_fdt_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
1626 gicv3_its_fdt_probe(device_t dev)
1629 if (!ofw_bus_status_okay(dev))
1632 if (!ofw_bus_is_compatible(dev, "arm,gic-v3-its"))
1635 device_set_desc(dev, "ARM GIC Interrupt Translation Service");
1636 return (BUS_PROBE_DEFAULT);
1640 gicv3_its_fdt_attach(device_t dev)
1642 struct gicv3_its_softc *sc;
1646 err = gicv3_its_attach(dev);
1650 sc = device_get_softc(dev);
1652 /* Register this device as a interrupt controller */
1653 xref = OF_xref_from_node(ofw_bus_get_node(dev));
1654 sc->sc_pic = intr_pic_register(dev, xref);
1655 intr_pic_add_handler(device_get_parent(dev), sc->sc_pic,
1656 gicv3_its_intr, sc, GIC_FIRST_LPI, LPI_NIRQS);
1658 /* Register this device to handle MSI interrupts */
1659 intr_msi_register(dev, xref);