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
34 #include "opt_platform.h"
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
40 #include <sys/systm.h>
42 #include <sys/cpuset.h>
43 #include <sys/endian.h>
44 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/module.h>
48 #include <sys/mutex.h>
50 #include <sys/queue.h>
58 #include <machine/bus.h>
59 #include <machine/intr.h>
61 #include <arm/arm/gic_common.h>
62 #include <arm64/arm64/gic_v3_reg.h>
63 #include <arm64/arm64/gic_v3_var.h>
66 #include <dev/ofw/openfirm.h>
67 #include <dev/ofw/ofw_bus.h>
68 #include <dev/ofw/ofw_bus_subr.h>
70 #include <dev/pci/pcireg.h>
71 #include <dev/pci/pcivar.h>
77 MALLOC_DEFINE(M_GICV3_ITS, "GICv3 ITS",
78 "ARM GICv3 Interrupt Translation Service");
80 #define LPI_NIRQS (64 * 1024)
82 /* The size and alignment of the command circular buffer */
83 #define ITS_CMDQ_SIZE (64 * 1024) /* Must be a multiple of 4K */
84 #define ITS_CMDQ_ALIGN (64 * 1024)
86 #define LPI_CONFTAB_SIZE LPI_NIRQS
87 #define LPI_CONFTAB_ALIGN (64 * 1024)
88 #define LPI_CONFTAB_MAX_ADDR ((1ul << 48) - 1) /* We need a 47 bit PA */
90 /* 1 bit per SPI, PPI, and SGI (8k), and 1 bit per LPI (LPI_CONFTAB_SIZE) */
91 #define LPI_PENDTAB_SIZE ((LPI_NIRQS + GIC_FIRST_LPI) / 8)
92 #define LPI_PENDTAB_ALIGN (64 * 1024)
93 #define LPI_PENDTAB_MAX_ADDR ((1ul << 48) - 1) /* We need a 47 bit PA */
95 #define LPI_INT_TRANS_TAB_ALIGN 256
96 #define LPI_INT_TRANS_TAB_MAX_ADDR ((1ul << 48) - 1)
98 /* ITS commands encoding */
99 #define ITS_CMD_MOVI (0x01)
100 #define ITS_CMD_SYNC (0x05)
101 #define ITS_CMD_MAPD (0x08)
102 #define ITS_CMD_MAPC (0x09)
103 #define ITS_CMD_MAPTI (0x0a)
104 #define ITS_CMD_MAPI (0x0b)
105 #define ITS_CMD_INV (0x0c)
106 #define ITS_CMD_INVALL (0x0d)
108 #define CMD_COMMAND_MASK (0xFFUL)
110 #define CMD_DEVID_SHIFT (32)
111 #define CMD_DEVID_MASK (0xFFFFFFFFUL << CMD_DEVID_SHIFT)
112 /* Size of IRQ ID bitfield */
113 #define CMD_SIZE_MASK (0xFFUL)
115 #define CMD_ID_MASK (0xFFFFFFFFUL)
116 /* Physical LPI ID */
117 #define CMD_PID_SHIFT (32)
118 #define CMD_PID_MASK (0xFFFFFFFFUL << CMD_PID_SHIFT)
120 #define CMD_COL_MASK (0xFFFFUL)
121 /* Target (CPU or Re-Distributor) */
122 #define CMD_TARGET_SHIFT (16)
123 #define CMD_TARGET_MASK (0xFFFFFFFFUL << CMD_TARGET_SHIFT)
124 /* Interrupt Translation Table address */
125 #define CMD_ITT_MASK (0xFFFFFFFFFF00UL)
126 /* Valid command bit */
127 #define CMD_VALID_SHIFT (63)
128 #define CMD_VALID_MASK (1UL << CMD_VALID_SHIFT)
130 #define ITS_TARGET_NONE 0xFBADBEEF
132 /* LPI chunk owned by ITS device */
135 u_int lpi_free; /* First free LPI in set */
136 u_int lpi_num; /* Total number of LPIs in chunk */
137 u_int lpi_busy; /* Number of busy LPIs in chink */
142 TAILQ_ENTRY(its_dev) entry;
145 /* Device ID (i.e. PCI device ID) */
147 /* List of assigned LPIs */
148 struct lpi_chunk lpis;
149 /* Virtual address of ITT */
155 * ITS command descriptor.
156 * Idea for command description passing taken from Linux.
158 struct its_cmd_desc {
163 struct its_dev *its_dev;
178 struct its_dev *its_dev;
185 struct its_dev *its_dev;
191 struct its_dev *its_dev;
196 struct its_dev *its_dev;
207 /* ITS command. Each command is 32 bytes long */
209 uint64_t cmd_dword[4]; /* ITS command double word */
212 /* An ITS private table */
214 vm_offset_t ptab_vaddr;
215 unsigned long ptab_size;
218 /* ITS collection description. */
220 uint64_t col_target; /* Target Re-Distributor */
221 uint64_t col_id; /* Collection ID */
224 struct gicv3_its_irqsrc {
225 struct intr_irqsrc gi_isrc;
228 struct its_dev *gi_its_dev;
231 struct gicv3_its_softc {
232 struct intr_pic *sc_pic;
233 struct resource *sc_its_res;
238 struct its_ptable sc_its_ptab[GITS_BASER_NUM];
239 struct its_col *sc_its_cols[MAXCPU]; /* Per-CPU collections */
242 * TODO: We should get these from the parent as we only want a
243 * single copy of each across the interrupt controller.
245 uint8_t *sc_conf_base;
246 vm_offset_t sc_pend_base[MAXCPU];
248 /* Command handling */
249 struct mtx sc_its_cmd_lock;
250 struct its_cmd *sc_its_cmd_base; /* Command circular buffer address */
251 size_t sc_its_cmd_next_idx;
253 vmem_t *sc_irq_alloc;
254 struct gicv3_its_irqsrc *sc_irqs;
258 struct mtx sc_its_dev_lock;
259 TAILQ_HEAD(its_dev_list, its_dev) sc_its_dev_list;
261 #define ITS_FLAGS_CMDQ_FLUSH 0x00000001
262 #define ITS_FLAGS_LPI_CONF_FLUSH 0x00000002
263 #define ITS_FLAGS_ERRATA_CAVIUM_22375 0x00000004
267 static void *conf_base;
269 typedef void (its_quirk_func_t)(device_t);
270 static its_quirk_func_t its_quirk_cavium_22375;
272 static const struct {
276 its_quirk_func_t *func;
279 /* Cavium ThunderX Pass 1.x */
280 .desc = "Cavium ThunderX errata: 22375, 24313",
281 .iidr = GITS_IIDR_RAW(GITS_IIDR_IMPL_CAVIUM,
282 GITS_IIDR_PROD_THUNDER, GITS_IIDR_VAR_THUNDER_1, 0),
283 .iidr_mask = ~GITS_IIDR_REVISION_MASK,
284 .func = its_quirk_cavium_22375,
288 #define gic_its_read_4(sc, reg) \
289 bus_read_4((sc)->sc_its_res, (reg))
290 #define gic_its_read_8(sc, reg) \
291 bus_read_8((sc)->sc_its_res, (reg))
293 #define gic_its_write_4(sc, reg, val) \
294 bus_write_4((sc)->sc_its_res, (reg), (val))
295 #define gic_its_write_8(sc, reg, val) \
296 bus_write_8((sc)->sc_its_res, (reg), (val))
298 static device_attach_t gicv3_its_attach;
299 static device_detach_t gicv3_its_detach;
301 static pic_disable_intr_t gicv3_its_disable_intr;
302 static pic_enable_intr_t gicv3_its_enable_intr;
303 static pic_map_intr_t gicv3_its_map_intr;
304 static pic_setup_intr_t gicv3_its_setup_intr;
305 static pic_post_filter_t gicv3_its_post_filter;
306 static pic_post_ithread_t gicv3_its_post_ithread;
307 static pic_pre_ithread_t gicv3_its_pre_ithread;
308 static pic_bind_intr_t gicv3_its_bind_intr;
310 static pic_init_secondary_t gicv3_its_init_secondary;
312 static msi_alloc_msi_t gicv3_its_alloc_msi;
313 static msi_release_msi_t gicv3_its_release_msi;
314 static msi_alloc_msix_t gicv3_its_alloc_msix;
315 static msi_release_msix_t gicv3_its_release_msix;
316 static msi_map_msi_t gicv3_its_map_msi;
318 static void its_cmd_movi(device_t, struct gicv3_its_irqsrc *);
319 static void its_cmd_mapc(device_t, struct its_col *, uint8_t);
320 static void its_cmd_mapti(device_t, struct gicv3_its_irqsrc *);
321 static void its_cmd_mapd(device_t, struct its_dev *, uint8_t);
322 static void its_cmd_inv(device_t, struct its_dev *, struct gicv3_its_irqsrc *);
323 static void its_cmd_invall(device_t, struct its_col *);
325 static device_method_t gicv3_its_methods[] = {
326 /* Device interface */
327 DEVMETHOD(device_detach, gicv3_its_detach),
329 /* Interrupt controller interface */
330 DEVMETHOD(pic_disable_intr, gicv3_its_disable_intr),
331 DEVMETHOD(pic_enable_intr, gicv3_its_enable_intr),
332 DEVMETHOD(pic_map_intr, gicv3_its_map_intr),
333 DEVMETHOD(pic_setup_intr, gicv3_its_setup_intr),
334 DEVMETHOD(pic_post_filter, gicv3_its_post_filter),
335 DEVMETHOD(pic_post_ithread, gicv3_its_post_ithread),
336 DEVMETHOD(pic_pre_ithread, gicv3_its_pre_ithread),
338 DEVMETHOD(pic_bind_intr, gicv3_its_bind_intr),
339 DEVMETHOD(pic_init_secondary, gicv3_its_init_secondary),
343 DEVMETHOD(msi_alloc_msi, gicv3_its_alloc_msi),
344 DEVMETHOD(msi_release_msi, gicv3_its_release_msi),
345 DEVMETHOD(msi_alloc_msix, gicv3_its_alloc_msix),
346 DEVMETHOD(msi_release_msix, gicv3_its_release_msix),
347 DEVMETHOD(msi_map_msi, gicv3_its_map_msi),
353 static DEFINE_CLASS_0(gic, gicv3_its_driver, gicv3_its_methods,
354 sizeof(struct gicv3_its_softc));
357 gicv3_its_cmdq_init(struct gicv3_its_softc *sc)
359 vm_paddr_t cmd_paddr;
362 /* Set up the command circular buffer */
363 sc->sc_its_cmd_base = contigmalloc(ITS_CMDQ_SIZE, M_GICV3_ITS,
364 M_WAITOK | M_ZERO, 0, (1ul << 48) - 1, ITS_CMDQ_ALIGN, 0);
365 sc->sc_its_cmd_next_idx = 0;
367 cmd_paddr = vtophys(sc->sc_its_cmd_base);
369 /* Set the base of the command buffer */
370 reg = GITS_CBASER_VALID |
371 (GITS_CBASER_CACHE_NIWAWB << GITS_CBASER_CACHE_SHIFT) |
372 cmd_paddr | (GITS_CBASER_SHARE_IS << GITS_CBASER_SHARE_SHIFT) |
373 (ITS_CMDQ_SIZE / 4096 - 1);
374 gic_its_write_8(sc, GITS_CBASER, reg);
376 /* Read back to check for fixed value fields */
377 tmp = gic_its_read_8(sc, GITS_CBASER);
379 if ((tmp & GITS_CBASER_SHARE_MASK) !=
380 (GITS_CBASER_SHARE_IS << GITS_CBASER_SHARE_SHIFT)) {
381 /* Check if the hardware reported non-shareable */
382 if ((tmp & GITS_CBASER_SHARE_MASK) ==
383 (GITS_CBASER_SHARE_NS << GITS_CBASER_SHARE_SHIFT)) {
384 /* If so remove the cache attribute */
385 reg &= ~GITS_CBASER_CACHE_MASK;
386 reg &= ~GITS_CBASER_SHARE_MASK;
387 /* Set to Non-cacheable, Non-shareable */
388 reg |= GITS_CBASER_CACHE_NIN << GITS_CBASER_CACHE_SHIFT;
389 reg |= GITS_CBASER_SHARE_NS << GITS_CBASER_SHARE_SHIFT;
391 gic_its_write_8(sc, GITS_CBASER, reg);
394 /* The command queue has to be flushed after each command */
395 sc->sc_its_flags |= ITS_FLAGS_CMDQ_FLUSH;
398 /* Get the next command from the start of the buffer */
399 gic_its_write_8(sc, GITS_CWRITER, 0x0);
403 gicv3_its_table_init(device_t dev, struct gicv3_its_softc *sc)
407 uint64_t cache, reg, share, tmp, type;
408 size_t esize, its_tbl_size, nidents, nitspages, npages;
412 if ((sc->sc_its_flags & ITS_FLAGS_ERRATA_CAVIUM_22375) != 0) {
414 * GITS_TYPER[17:13] of ThunderX reports that device IDs
415 * are to be 21 bits in length. The entry size of the ITS
416 * table can be read from GITS_BASERn[52:48] and on ThunderX
417 * is supposed to be 8 bytes in length (for device table).
418 * Finally the page size that is to be used by ITS to access
419 * this table will be set to 64KB.
421 * This gives 0x200000 entries of size 0x8 bytes covered by
422 * 256 pages each of which 64KB in size. The number of pages
423 * (minus 1) should then be written to GITS_BASERn[7:0]. In
424 * that case this value would be 0xFF but on ThunderX the
425 * maximum value that HW accepts is 0xFD.
427 * Set an arbitrary number of device ID bits to 20 in order
428 * to limit the number of entries in ITS device table to
429 * 0x100000 and the table size to 8MB.
434 devbits = GITS_TYPER_DEVB(gic_its_read_8(sc, GITS_TYPER));
435 cache = GITS_BASER_CACHE_WAWB;
437 share = GITS_BASER_SHARE_IS;
438 page_size = PAGE_SIZE_64K;
440 for (i = 0; i < GITS_BASER_NUM; i++) {
441 reg = gic_its_read_8(sc, GITS_BASER(i));
442 /* The type of table */
443 type = GITS_BASER_TYPE(reg);
444 /* The table entry size */
445 esize = GITS_BASER_ESIZE(reg);
448 case GITS_BASER_TYPE_DEV:
449 nidents = (1 << devbits);
450 its_tbl_size = esize * nidents;
451 its_tbl_size = roundup2(its_tbl_size, PAGE_SIZE_64K);
453 case GITS_BASER_TYPE_VP:
454 case GITS_BASER_TYPE_PP: /* Undocumented? */
455 case GITS_BASER_TYPE_IC:
456 its_tbl_size = page_size;
461 npages = howmany(its_tbl_size, PAGE_SIZE);
463 /* Allocate the table */
464 table = (vm_offset_t)contigmalloc(npages * PAGE_SIZE,
465 M_GICV3_ITS, M_WAITOK | M_ZERO, 0, (1ul << 48) - 1,
468 sc->sc_its_ptab[i].ptab_vaddr = table;
469 sc->sc_its_ptab[i].ptab_size = npages * PAGE_SIZE;
471 paddr = vtophys(table);
474 nitspages = howmany(its_tbl_size, page_size);
476 /* Clear the fields we will be setting */
477 reg &= ~(GITS_BASER_VALID |
478 GITS_BASER_CACHE_MASK | GITS_BASER_TYPE_MASK |
479 GITS_BASER_ESIZE_MASK | GITS_BASER_PA_MASK |
480 GITS_BASER_SHARE_MASK | GITS_BASER_PSZ_MASK |
481 GITS_BASER_SIZE_MASK);
482 /* Set the new values */
483 reg |= GITS_BASER_VALID |
484 (cache << GITS_BASER_CACHE_SHIFT) |
485 (type << GITS_BASER_TYPE_SHIFT) |
486 ((esize - 1) << GITS_BASER_ESIZE_SHIFT) |
487 paddr | (share << GITS_BASER_SHARE_SHIFT) |
491 case PAGE_SIZE: /* 4KB */
493 GITS_BASER_PSZ_4K << GITS_BASER_PSZ_SHIFT;
495 case PAGE_SIZE_16K: /* 16KB */
497 GITS_BASER_PSZ_16K << GITS_BASER_PSZ_SHIFT;
499 case PAGE_SIZE_64K: /* 64KB */
501 GITS_BASER_PSZ_64K << GITS_BASER_PSZ_SHIFT;
505 gic_its_write_8(sc, GITS_BASER(i), reg);
507 /* Read back to check */
508 tmp = gic_its_read_8(sc, GITS_BASER(i));
510 /* Do the shareability masks line up? */
511 if ((tmp & GITS_BASER_SHARE_MASK) !=
512 (reg & GITS_BASER_SHARE_MASK)) {
513 share = (tmp & GITS_BASER_SHARE_MASK) >>
514 GITS_BASER_SHARE_SHIFT;
518 if ((tmp & GITS_BASER_PSZ_MASK) !=
519 (reg & GITS_BASER_PSZ_MASK)) {
522 page_size = PAGE_SIZE;
525 page_size = PAGE_SIZE_16K;
531 device_printf(dev, "GITS_BASER%d: "
532 "unable to be updated: %lx != %lx\n",
537 /* We should have made all needed changes */
546 gicv3_its_conftable_init(struct gicv3_its_softc *sc)
550 conf_table = (void *)atomic_load_ptr((uintptr_t *)&conf_base);
551 if (conf_table == NULL) {
552 conf_table = contigmalloc(LPI_CONFTAB_SIZE,
553 M_GICV3_ITS, M_WAITOK, 0, LPI_CONFTAB_MAX_ADDR,
554 LPI_CONFTAB_ALIGN, 0);
556 if (atomic_cmpset_ptr((uintptr_t *)&conf_base,
557 (uintptr_t)NULL, (uintptr_t)conf_table) == 0) {
558 contigfree(conf_table, LPI_CONFTAB_SIZE, M_GICV3_ITS);
560 (void *)atomic_load_ptr((uintptr_t *)&conf_base);
563 sc->sc_conf_base = conf_table;
565 /* Set the default configuration */
566 memset(sc->sc_conf_base, GIC_PRIORITY_MAX | LPI_CONF_GROUP1,
569 /* Flush the table to memory */
570 cpu_dcache_wb_range((vm_offset_t)sc->sc_conf_base, LPI_CONFTAB_SIZE);
574 gicv3_its_pendtables_init(struct gicv3_its_softc *sc)
578 for (i = 0; i <= mp_maxid; i++) {
579 if (CPU_ISSET(i, &sc->sc_cpus) == 0)
582 sc->sc_pend_base[i] = (vm_offset_t)contigmalloc(
583 LPI_PENDTAB_SIZE, M_GICV3_ITS, M_WAITOK | M_ZERO,
584 0, LPI_PENDTAB_MAX_ADDR, LPI_PENDTAB_ALIGN, 0);
586 /* Flush so the ITS can see the memory */
587 cpu_dcache_wb_range((vm_offset_t)sc->sc_pend_base[i],
593 its_init_cpu_lpi(device_t dev, struct gicv3_its_softc *sc)
596 uint64_t xbaser, tmp;
600 gicv3 = device_get_parent(dev);
601 cpuid = PCPU_GET(cpuid);
604 ctlr = gic_r_read_4(gicv3, GICR_CTLR);
605 ctlr &= ~GICR_CTLR_LPI_ENABLE;
606 gic_r_write_4(gicv3, GICR_CTLR, ctlr);
608 /* Make sure changes are observable my the GIC */
612 * Set the redistributor base
614 xbaser = vtophys(sc->sc_conf_base) |
615 (GICR_PROPBASER_SHARE_IS << GICR_PROPBASER_SHARE_SHIFT) |
616 (GICR_PROPBASER_CACHE_NIWAWB << GICR_PROPBASER_CACHE_SHIFT) |
617 (flsl(LPI_CONFTAB_SIZE | GIC_FIRST_LPI) - 1);
618 gic_r_write_8(gicv3, GICR_PROPBASER, xbaser);
620 /* Check the cache attributes we set */
621 tmp = gic_r_read_8(gicv3, GICR_PROPBASER);
623 if ((tmp & GICR_PROPBASER_SHARE_MASK) !=
624 (xbaser & GICR_PROPBASER_SHARE_MASK)) {
625 if ((tmp & GICR_PROPBASER_SHARE_MASK) ==
626 (GICR_PROPBASER_SHARE_NS << GICR_PROPBASER_SHARE_SHIFT)) {
627 /* We need to mark as non-cacheable */
628 xbaser &= ~(GICR_PROPBASER_SHARE_MASK |
629 GICR_PROPBASER_CACHE_MASK);
631 xbaser |= GICR_PROPBASER_CACHE_NIN <<
632 GICR_PROPBASER_CACHE_SHIFT;
634 xbaser |= GICR_PROPBASER_SHARE_NS <<
635 GICR_PROPBASER_SHARE_SHIFT;
636 gic_r_write_8(gicv3, GICR_PROPBASER, xbaser);
638 sc->sc_its_flags |= ITS_FLAGS_LPI_CONF_FLUSH;
642 * Set the LPI pending table base
644 xbaser = vtophys(sc->sc_pend_base[cpuid]) |
645 (GICR_PENDBASER_CACHE_NIWAWB << GICR_PENDBASER_CACHE_SHIFT) |
646 (GICR_PENDBASER_SHARE_IS << GICR_PENDBASER_SHARE_SHIFT);
648 gic_r_write_8(gicv3, GICR_PENDBASER, xbaser);
650 tmp = gic_r_read_8(gicv3, GICR_PENDBASER);
652 if ((tmp & GICR_PENDBASER_SHARE_MASK) ==
653 (GICR_PENDBASER_SHARE_NS << GICR_PENDBASER_SHARE_SHIFT)) {
654 /* Clear the cahce and shareability bits */
655 xbaser &= ~(GICR_PENDBASER_CACHE_MASK |
656 GICR_PENDBASER_SHARE_MASK);
657 /* Mark as non-shareable */
658 xbaser |= GICR_PENDBASER_SHARE_NS << GICR_PENDBASER_SHARE_SHIFT;
659 /* And non-cacheable */
660 xbaser |= GICR_PENDBASER_CACHE_NIN <<
661 GICR_PENDBASER_CACHE_SHIFT;
665 ctlr = gic_r_read_4(gicv3, GICR_CTLR);
666 ctlr |= GICR_CTLR_LPI_ENABLE;
667 gic_r_write_4(gicv3, GICR_CTLR, ctlr);
669 /* Make sure the GIC has seen everything */
674 its_init_cpu(device_t dev, struct gicv3_its_softc *sc)
679 struct redist_pcpu *rpcpu;
681 gicv3 = device_get_parent(dev);
682 cpuid = PCPU_GET(cpuid);
683 if (!CPU_ISSET(cpuid, &sc->sc_cpus))
686 /* Check if the ITS is enabled on this CPU */
687 if ((gic_r_read_4(gicv3, GICR_TYPER) & GICR_TYPER_PLPIS) == 0)
690 rpcpu = gicv3_get_redist(dev);
692 /* Do per-cpu LPI init once */
693 if (!rpcpu->lpi_enabled) {
694 its_init_cpu_lpi(dev, sc);
695 rpcpu->lpi_enabled = true;
698 if ((gic_its_read_8(sc, GITS_TYPER) & GITS_TYPER_PTA) != 0) {
699 /* This ITS wants the redistributor physical address */
700 target = vtophys(rman_get_virtual(&rpcpu->res));
702 /* This ITS wants the unique processor number */
703 target = GICR_TYPER_CPUNUM(gic_r_read_8(gicv3, GICR_TYPER)) <<
707 sc->sc_its_cols[cpuid]->col_target = target;
708 sc->sc_its_cols[cpuid]->col_id = cpuid;
710 its_cmd_mapc(dev, sc->sc_its_cols[cpuid], 1);
711 its_cmd_invall(dev, sc->sc_its_cols[cpuid]);
717 gicv3_its_attach(device_t dev)
719 struct gicv3_its_softc *sc;
722 int domain, err, i, rid;
724 sc = device_get_softc(dev);
726 sc->sc_irq_length = gicv3_get_nirqs(dev);
727 sc->sc_irq_base = GIC_FIRST_LPI;
728 sc->sc_irq_base += device_get_unit(dev) * sc->sc_irq_length;
731 sc->sc_its_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
733 if (sc->sc_its_res == NULL) {
734 device_printf(dev, "Could not allocate memory\n");
738 iidr = gic_its_read_4(sc, GITS_IIDR);
739 for (i = 0; i < nitems(its_quirks); i++) {
740 if ((iidr & its_quirks[i].iidr_mask) == its_quirks[i].iidr) {
742 device_printf(dev, "Applying %s\n",
745 its_quirks[i].func(dev);
750 /* Allocate the private tables */
751 err = gicv3_its_table_init(dev, sc);
755 /* Protects access to the device list */
756 mtx_init(&sc->sc_its_dev_lock, "ITS device lock", NULL, MTX_SPIN);
758 /* Protects access to the ITS command circular buffer. */
759 mtx_init(&sc->sc_its_cmd_lock, "ITS cmd lock", NULL, MTX_SPIN);
761 CPU_ZERO(&sc->sc_cpus);
762 if (bus_get_domain(dev, &domain) == 0) {
763 if (domain < MAXMEMDOM)
764 CPU_COPY(&cpuset_domain[domain], &sc->sc_cpus);
766 CPU_COPY(&all_cpus, &sc->sc_cpus);
769 /* Allocate the command circular buffer */
770 gicv3_its_cmdq_init(sc);
772 /* Allocate the per-CPU collections */
773 for (int cpu = 0; cpu <= mp_maxid; cpu++)
774 if (CPU_ISSET(cpu, &sc->sc_cpus) != 0)
775 sc->sc_its_cols[cpu] = malloc(
776 sizeof(*sc->sc_its_cols[0]), M_GICV3_ITS,
779 sc->sc_its_cols[cpu] = NULL;
782 gic_its_write_4(sc, GITS_CTLR,
783 gic_its_read_4(sc, GITS_CTLR) | GITS_CTLR_EN);
785 /* Create the LPI configuration table */
786 gicv3_its_conftable_init(sc);
788 /* And the pending tebles */
789 gicv3_its_pendtables_init(sc);
791 /* Enable LPIs on this CPU */
792 its_init_cpu(dev, sc);
794 TAILQ_INIT(&sc->sc_its_dev_list);
797 * Create the vmem object to allocate INTRNG IRQs from. We try to
798 * use all IRQs not already used by the GICv3.
799 * XXX: This assumes there are no other interrupt controllers in the
802 sc->sc_irq_alloc = vmem_create(device_get_nameunit(dev), 0,
803 gicv3_get_nirqs(dev), 1, 0, M_FIRSTFIT | M_WAITOK);
805 sc->sc_irqs = malloc(sizeof(*sc->sc_irqs) * sc->sc_irq_length,
806 M_GICV3_ITS, M_WAITOK | M_ZERO);
807 name = device_get_nameunit(dev);
808 for (i = 0; i < sc->sc_irq_length; i++) {
809 sc->sc_irqs[i].gi_id = -1;
810 sc->sc_irqs[i].gi_lpi = i + sc->sc_irq_base - GIC_FIRST_LPI;
811 err = intr_isrc_register(&sc->sc_irqs[i].gi_isrc, dev, 0,
819 gicv3_its_detach(device_t dev)
826 its_quirk_cavium_22375(device_t dev)
828 struct gicv3_its_softc *sc;
830 sc = device_get_softc(dev);
831 sc->sc_its_flags |= ITS_FLAGS_ERRATA_CAVIUM_22375;
835 gicv3_its_disable_intr(device_t dev, struct intr_irqsrc *isrc)
837 struct gicv3_its_softc *sc;
838 struct gicv3_its_irqsrc *girq;
841 sc = device_get_softc(dev);
842 girq = (struct gicv3_its_irqsrc *)isrc;
843 conf = sc->sc_conf_base;
845 conf[girq->gi_lpi] &= ~LPI_CONF_ENABLE;
847 if ((sc->sc_its_flags & ITS_FLAGS_LPI_CONF_FLUSH) != 0) {
848 /* Clean D-cache under command. */
849 cpu_dcache_wb_range((vm_offset_t)&conf[girq->gi_lpi], 1);
851 /* DSB inner shareable, store */
855 its_cmd_inv(dev, girq->gi_its_dev, girq);
859 gicv3_its_enable_intr(device_t dev, struct intr_irqsrc *isrc)
861 struct gicv3_its_softc *sc;
862 struct gicv3_its_irqsrc *girq;
865 sc = device_get_softc(dev);
866 girq = (struct gicv3_its_irqsrc *)isrc;
867 conf = sc->sc_conf_base;
869 conf[girq->gi_lpi] |= LPI_CONF_ENABLE;
871 if ((sc->sc_its_flags & ITS_FLAGS_LPI_CONF_FLUSH) != 0) {
872 /* Clean D-cache under command. */
873 cpu_dcache_wb_range((vm_offset_t)&conf[girq->gi_lpi], 1);
875 /* DSB inner shareable, store */
879 its_cmd_inv(dev, girq->gi_its_dev, girq);
883 gicv3_its_intr(void *arg, uintptr_t irq)
885 struct gicv3_its_softc *sc = arg;
886 struct gicv3_its_irqsrc *girq;
887 struct trapframe *tf;
889 irq -= sc->sc_irq_base;
890 girq = &sc->sc_irqs[irq];
892 panic("gicv3_its_intr: Invalid interrupt %ld",
893 irq + sc->sc_irq_base);
895 tf = curthread->td_intr_frame;
896 intr_isrc_dispatch(&girq->gi_isrc, tf);
897 return (FILTER_HANDLED);
901 gicv3_its_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
903 struct gicv3_its_irqsrc *girq;
904 struct gicv3_its_softc *sc;
906 sc = device_get_softc(dev);
907 girq = (struct gicv3_its_irqsrc *)isrc;
908 gicv3_its_disable_intr(dev, isrc);
909 gic_icc_write(EOIR1, girq->gi_lpi + GIC_FIRST_LPI);
913 gicv3_its_post_ithread(device_t dev, struct intr_irqsrc *isrc)
916 gicv3_its_enable_intr(dev, isrc);
920 gicv3_its_post_filter(device_t dev, struct intr_irqsrc *isrc)
922 struct gicv3_its_irqsrc *girq;
923 struct gicv3_its_softc *sc;
925 sc = device_get_softc(dev);
926 girq = (struct gicv3_its_irqsrc *)isrc;
927 gic_icc_write(EOIR1, girq->gi_lpi + GIC_FIRST_LPI);
931 gicv3_its_select_cpu(device_t dev, struct intr_irqsrc *isrc)
933 struct gicv3_its_softc *sc;
935 sc = device_get_softc(dev);
936 if (CPU_EMPTY(&isrc->isrc_cpu)) {
937 sc->gic_irq_cpu = intr_irq_next_cpu(sc->gic_irq_cpu,
939 CPU_SETOF(sc->gic_irq_cpu, &isrc->isrc_cpu);
946 gicv3_its_bind_intr(device_t dev, struct intr_irqsrc *isrc)
948 struct gicv3_its_irqsrc *girq;
950 gicv3_its_select_cpu(dev, isrc);
952 girq = (struct gicv3_its_irqsrc *)isrc;
953 its_cmd_movi(dev, girq);
958 gicv3_its_map_intr(device_t dev, struct intr_map_data *data,
959 struct intr_irqsrc **isrcp)
963 * This should never happen, we only call this function to map
964 * interrupts found before the controller driver is ready.
966 panic("gicv3_its_map_intr: Unable to map a MSI interrupt");
970 gicv3_its_setup_intr(device_t dev, struct intr_irqsrc *isrc,
971 struct resource *res, struct intr_map_data *data)
974 /* Bind the interrupt to a CPU */
975 gicv3_its_bind_intr(dev, isrc);
982 gicv3_its_init_secondary(device_t dev)
984 struct gicv3_its_softc *sc;
986 sc = device_get_softc(dev);
989 * This is fatal as otherwise we may bind interrupts to this CPU.
990 * We need a way to tell the interrupt framework to only bind to a
991 * subset of given CPUs when it performs the shuffle.
993 if (its_init_cpu(dev, sc) != 0)
994 panic("gicv3_its_init_secondary: No usable ITS on CPU%d",
1000 its_get_devid(device_t pci_dev)
1004 if (pci_get_id(pci_dev, PCI_ID_MSI, &id) != 0)
1005 panic("its_get_devid: Unable to get the MSI DeviceID");
1010 static struct its_dev *
1011 its_device_find(device_t dev, device_t child)
1013 struct gicv3_its_softc *sc;
1014 struct its_dev *its_dev = NULL;
1016 sc = device_get_softc(dev);
1018 mtx_lock_spin(&sc->sc_its_dev_lock);
1019 TAILQ_FOREACH(its_dev, &sc->sc_its_dev_list, entry) {
1020 if (its_dev->pci_dev == child)
1023 mtx_unlock_spin(&sc->sc_its_dev_lock);
1028 static struct its_dev *
1029 its_device_get(device_t dev, device_t child, u_int nvecs)
1031 struct gicv3_its_softc *sc;
1032 struct its_dev *its_dev;
1033 vmem_addr_t irq_base;
1036 sc = device_get_softc(dev);
1038 its_dev = its_device_find(dev, child);
1039 if (its_dev != NULL)
1042 its_dev = malloc(sizeof(*its_dev), M_GICV3_ITS, M_NOWAIT | M_ZERO);
1043 if (its_dev == NULL)
1046 its_dev->pci_dev = child;
1047 its_dev->devid = its_get_devid(child);
1049 its_dev->lpis.lpi_busy = 0;
1050 its_dev->lpis.lpi_num = nvecs;
1051 its_dev->lpis.lpi_free = nvecs;
1053 if (vmem_alloc(sc->sc_irq_alloc, nvecs, M_FIRSTFIT | M_NOWAIT,
1055 free(its_dev, M_GICV3_ITS);
1058 its_dev->lpis.lpi_base = irq_base;
1060 /* Get ITT entry size */
1061 esize = GITS_TYPER_ITTES(gic_its_read_8(sc, GITS_TYPER));
1064 * Allocate ITT for this device.
1065 * PA has to be 256 B aligned. At least two entries for device.
1067 its_dev->itt_size = roundup2(MAX(nvecs, 2) * esize, 256);
1068 its_dev->itt = (vm_offset_t)contigmalloc(its_dev->itt_size,
1069 M_GICV3_ITS, M_NOWAIT | M_ZERO, 0, LPI_INT_TRANS_TAB_MAX_ADDR,
1070 LPI_INT_TRANS_TAB_ALIGN, 0);
1071 if (its_dev->itt == 0) {
1072 vmem_free(sc->sc_irq_alloc, its_dev->lpis.lpi_base, nvecs);
1073 free(its_dev, M_GICV3_ITS);
1077 mtx_lock_spin(&sc->sc_its_dev_lock);
1078 TAILQ_INSERT_TAIL(&sc->sc_its_dev_list, its_dev, entry);
1079 mtx_unlock_spin(&sc->sc_its_dev_lock);
1081 /* Map device to its ITT */
1082 its_cmd_mapd(dev, its_dev, 1);
1088 its_device_release(device_t dev, struct its_dev *its_dev)
1090 struct gicv3_its_softc *sc;
1092 KASSERT(its_dev->lpis.lpi_busy == 0,
1093 ("its_device_release: Trying to release an inuse ITS device"));
1095 /* Unmap device in ITS */
1096 its_cmd_mapd(dev, its_dev, 0);
1098 sc = device_get_softc(dev);
1100 /* Remove the device from the list of devices */
1101 mtx_lock_spin(&sc->sc_its_dev_lock);
1102 TAILQ_REMOVE(&sc->sc_its_dev_list, its_dev, entry);
1103 mtx_unlock_spin(&sc->sc_its_dev_lock);
1106 KASSERT(its_dev->itt != 0, ("Invalid ITT in valid ITS device"));
1107 contigfree((void *)its_dev->itt, its_dev->itt_size, M_GICV3_ITS);
1109 /* Free the IRQ allocation */
1110 vmem_free(sc->sc_irq_alloc, its_dev->lpis.lpi_base,
1111 its_dev->lpis.lpi_num);
1113 free(its_dev, M_GICV3_ITS);
1117 gicv3_its_alloc_msi(device_t dev, device_t child, int count, int maxcount,
1118 device_t *pic, struct intr_irqsrc **srcs)
1120 struct gicv3_its_softc *sc;
1121 struct gicv3_its_irqsrc *girq;
1122 struct its_dev *its_dev;
1126 its_dev = its_device_get(dev, child, count);
1127 if (its_dev == NULL)
1130 KASSERT(its_dev->lpis.lpi_free >= count,
1131 ("gicv3_its_alloc_msi: No free LPIs"));
1132 sc = device_get_softc(dev);
1133 irq = its_dev->lpis.lpi_base + its_dev->lpis.lpi_num -
1134 its_dev->lpis.lpi_free;
1135 for (i = 0; i < count; i++, irq++) {
1136 its_dev->lpis.lpi_free--;
1137 girq = &sc->sc_irqs[irq];
1139 girq->gi_its_dev = its_dev;
1140 srcs[i] = (struct intr_irqsrc *)girq;
1142 /* Map the message to the given IRQ */
1143 gicv3_its_select_cpu(dev, (struct intr_irqsrc *)girq);
1144 its_cmd_mapti(dev, girq);
1146 its_dev->lpis.lpi_busy += count;
1153 gicv3_its_release_msi(device_t dev, device_t child, int count,
1154 struct intr_irqsrc **isrc)
1156 struct gicv3_its_irqsrc *girq;
1157 struct its_dev *its_dev;
1160 its_dev = its_device_find(dev, child);
1162 KASSERT(its_dev != NULL,
1163 ("gicv3_its_release_msi: Releasing a MSI interrupt with "
1165 KASSERT(its_dev->lpis.lpi_busy >= count,
1166 ("gicv3_its_release_msi: Releasing more interrupts than "
1167 "were allocated: releasing %d, allocated %d", count,
1168 its_dev->lpis.lpi_busy));
1169 for (i = 0; i < count; i++) {
1170 girq = (struct gicv3_its_irqsrc *)isrc[i];
1172 girq->gi_its_dev = NULL;
1174 its_dev->lpis.lpi_busy -= count;
1176 if (its_dev->lpis.lpi_busy == 0)
1177 its_device_release(dev, its_dev);
1183 gicv3_its_alloc_msix(device_t dev, device_t child, device_t *pic,
1184 struct intr_irqsrc **isrcp)
1186 struct gicv3_its_softc *sc;
1187 struct gicv3_its_irqsrc *girq;
1188 struct its_dev *its_dev;
1191 nvecs = pci_msix_count(child);
1192 its_dev = its_device_get(dev, child, nvecs);
1193 if (its_dev == NULL)
1196 KASSERT(its_dev->lpis.lpi_free > 0,
1197 ("gicv3_its_alloc_msix: No free LPIs"));
1198 sc = device_get_softc(dev);
1199 irq = its_dev->lpis.lpi_base + its_dev->lpis.lpi_num -
1200 its_dev->lpis.lpi_free;
1201 girq = &sc->sc_irqs[irq];
1202 girq->gi_id = its_dev->lpis.lpi_busy;
1203 girq->gi_its_dev = its_dev;
1205 its_dev->lpis.lpi_free--;
1206 its_dev->lpis.lpi_busy++;
1208 /* Map the message to the given IRQ */
1209 gicv3_its_select_cpu(dev, (struct intr_irqsrc *)girq);
1210 its_cmd_mapti(dev, girq);
1213 *isrcp = (struct intr_irqsrc *)girq;
1219 gicv3_its_release_msix(device_t dev, device_t child, struct intr_irqsrc *isrc)
1221 struct gicv3_its_irqsrc *girq;
1222 struct its_dev *its_dev;
1224 its_dev = its_device_find(dev, child);
1226 KASSERT(its_dev != NULL,
1227 ("gicv3_its_release_msix: Releasing a MSI-X interrupt with "
1229 KASSERT(its_dev->lpis.lpi_busy > 0,
1230 ("gicv3_its_release_msix: Releasing more interrupts than "
1231 "were allocated: allocated %d", its_dev->lpis.lpi_busy));
1232 girq = (struct gicv3_its_irqsrc *)isrc;
1233 girq->gi_its_dev = NULL;
1235 its_dev->lpis.lpi_busy--;
1237 if (its_dev->lpis.lpi_busy == 0)
1238 its_device_release(dev, its_dev);
1244 gicv3_its_map_msi(device_t dev, device_t child, struct intr_irqsrc *isrc,
1245 uint64_t *addr, uint32_t *data)
1247 struct gicv3_its_softc *sc;
1248 struct gicv3_its_irqsrc *girq;
1250 sc = device_get_softc(dev);
1251 girq = (struct gicv3_its_irqsrc *)isrc;
1253 *addr = vtophys(rman_get_virtual(sc->sc_its_res)) + GITS_TRANSLATER;
1254 *data = girq->gi_id;
1260 * Commands handling.
1263 static __inline void
1264 cmd_format_command(struct its_cmd *cmd, uint8_t cmd_type)
1266 /* Command field: DW0 [7:0] */
1267 cmd->cmd_dword[0] &= htole64(~CMD_COMMAND_MASK);
1268 cmd->cmd_dword[0] |= htole64(cmd_type);
1271 static __inline void
1272 cmd_format_devid(struct its_cmd *cmd, uint32_t devid)
1274 /* Device ID field: DW0 [63:32] */
1275 cmd->cmd_dword[0] &= htole64(~CMD_DEVID_MASK);
1276 cmd->cmd_dword[0] |= htole64((uint64_t)devid << CMD_DEVID_SHIFT);
1279 static __inline void
1280 cmd_format_size(struct its_cmd *cmd, uint16_t size)
1282 /* Size field: DW1 [4:0] */
1283 cmd->cmd_dword[1] &= htole64(~CMD_SIZE_MASK);
1284 cmd->cmd_dword[1] |= htole64((size & CMD_SIZE_MASK));
1287 static __inline void
1288 cmd_format_id(struct its_cmd *cmd, uint32_t id)
1290 /* ID field: DW1 [31:0] */
1291 cmd->cmd_dword[1] &= htole64(~CMD_ID_MASK);
1292 cmd->cmd_dword[1] |= htole64(id);
1295 static __inline void
1296 cmd_format_pid(struct its_cmd *cmd, uint32_t pid)
1298 /* Physical ID field: DW1 [63:32] */
1299 cmd->cmd_dword[1] &= htole64(~CMD_PID_MASK);
1300 cmd->cmd_dword[1] |= htole64((uint64_t)pid << CMD_PID_SHIFT);
1303 static __inline void
1304 cmd_format_col(struct its_cmd *cmd, uint16_t col_id)
1306 /* Collection field: DW2 [16:0] */
1307 cmd->cmd_dword[2] &= htole64(~CMD_COL_MASK);
1308 cmd->cmd_dword[2] |= htole64(col_id);
1311 static __inline void
1312 cmd_format_target(struct its_cmd *cmd, uint64_t target)
1314 /* Target Address field: DW2 [47:16] */
1315 cmd->cmd_dword[2] &= htole64(~CMD_TARGET_MASK);
1316 cmd->cmd_dword[2] |= htole64(target & CMD_TARGET_MASK);
1319 static __inline void
1320 cmd_format_itt(struct its_cmd *cmd, uint64_t itt)
1322 /* ITT Address field: DW2 [47:8] */
1323 cmd->cmd_dword[2] &= htole64(~CMD_ITT_MASK);
1324 cmd->cmd_dword[2] |= htole64(itt & CMD_ITT_MASK);
1327 static __inline void
1328 cmd_format_valid(struct its_cmd *cmd, uint8_t valid)
1330 /* Valid field: DW2 [63] */
1331 cmd->cmd_dword[2] &= htole64(~CMD_VALID_MASK);
1332 cmd->cmd_dword[2] |= htole64((uint64_t)valid << CMD_VALID_SHIFT);
1336 its_cmd_queue_full(struct gicv3_its_softc *sc)
1338 size_t read_idx, next_write_idx;
1340 /* Get the index of the next command */
1341 next_write_idx = (sc->sc_its_cmd_next_idx + 1) %
1342 (ITS_CMDQ_SIZE / sizeof(struct its_cmd));
1343 /* And the index of the current command being read */
1344 read_idx = gic_its_read_4(sc, GITS_CREADR) / sizeof(struct its_cmd);
1347 * The queue is full when the write offset points
1348 * at the command before the current read offset.
1350 return (next_write_idx == read_idx);
1354 its_cmd_sync(struct gicv3_its_softc *sc, struct its_cmd *cmd)
1357 if ((sc->sc_its_flags & ITS_FLAGS_CMDQ_FLUSH) != 0) {
1358 /* Clean D-cache under command. */
1359 cpu_dcache_wb_range((vm_offset_t)cmd, sizeof(*cmd));
1361 /* DSB inner shareable, store */
1367 static inline uint64_t
1368 its_cmd_cwriter_offset(struct gicv3_its_softc *sc, struct its_cmd *cmd)
1372 off = (cmd - sc->sc_its_cmd_base) * sizeof(*cmd);
1378 its_cmd_wait_completion(device_t dev, struct its_cmd *cmd_first,
1379 struct its_cmd *cmd_last)
1381 struct gicv3_its_softc *sc;
1382 uint64_t first, last, read;
1385 sc = device_get_softc(dev);
1388 * XXX ARM64TODO: This is obviously a significant delay.
1389 * The reason for that is that currently the time frames for
1390 * the command to complete are not known.
1394 first = its_cmd_cwriter_offset(sc, cmd_first);
1395 last = its_cmd_cwriter_offset(sc, cmd_last);
1398 read = gic_its_read_8(sc, GITS_CREADR);
1400 if (read < first || read >= last)
1402 } else if (read < first && read >= last)
1405 if (us_left-- == 0) {
1406 /* This means timeout */
1408 "Timeout while waiting for CMD completion.\n");
1416 static struct its_cmd *
1417 its_cmd_alloc_locked(device_t dev)
1419 struct gicv3_its_softc *sc;
1420 struct its_cmd *cmd;
1423 sc = device_get_softc(dev);
1426 * XXX ARM64TODO: This is obviously a significant delay.
1427 * The reason for that is that currently the time frames for
1428 * the command to complete (and therefore free the descriptor)
1433 mtx_assert(&sc->sc_its_cmd_lock, MA_OWNED);
1434 while (its_cmd_queue_full(sc)) {
1435 if (us_left-- == 0) {
1436 /* Timeout while waiting for free command */
1438 "Timeout while waiting for free command\n");
1444 cmd = &sc->sc_its_cmd_base[sc->sc_its_cmd_next_idx];
1445 sc->sc_its_cmd_next_idx++;
1446 sc->sc_its_cmd_next_idx %= ITS_CMDQ_SIZE / sizeof(struct its_cmd);
1452 its_cmd_prepare(struct its_cmd *cmd, struct its_cmd_desc *desc)
1458 cmd_type = desc->cmd_type;
1459 target = ITS_TARGET_NONE;
1462 case ITS_CMD_MOVI: /* Move interrupt ID to another collection */
1463 target = desc->cmd_desc_movi.col->col_target;
1464 cmd_format_command(cmd, ITS_CMD_MOVI);
1465 cmd_format_id(cmd, desc->cmd_desc_movi.id);
1466 cmd_format_col(cmd, desc->cmd_desc_movi.col->col_id);
1467 cmd_format_devid(cmd, desc->cmd_desc_movi.its_dev->devid);
1469 case ITS_CMD_SYNC: /* Wait for previous commands completion */
1470 target = desc->cmd_desc_sync.col->col_target;
1471 cmd_format_command(cmd, ITS_CMD_SYNC);
1472 cmd_format_target(cmd, target);
1474 case ITS_CMD_MAPD: /* Assign ITT to device */
1475 cmd_format_command(cmd, ITS_CMD_MAPD);
1476 cmd_format_itt(cmd, vtophys(desc->cmd_desc_mapd.its_dev->itt));
1478 * Size describes number of bits to encode interrupt IDs
1479 * supported by the device minus one.
1480 * When V (valid) bit is zero, this field should be written
1483 if (desc->cmd_desc_mapd.valid != 0) {
1484 size = fls(desc->cmd_desc_mapd.its_dev->lpis.lpi_num);
1485 size = MAX(1, size) - 1;
1489 cmd_format_size(cmd, size);
1490 cmd_format_devid(cmd, desc->cmd_desc_mapd.its_dev->devid);
1491 cmd_format_valid(cmd, desc->cmd_desc_mapd.valid);
1493 case ITS_CMD_MAPC: /* Map collection to Re-Distributor */
1494 target = desc->cmd_desc_mapc.col->col_target;
1495 cmd_format_command(cmd, ITS_CMD_MAPC);
1496 cmd_format_col(cmd, desc->cmd_desc_mapc.col->col_id);
1497 cmd_format_valid(cmd, desc->cmd_desc_mapc.valid);
1498 cmd_format_target(cmd, target);
1501 target = desc->cmd_desc_mapvi.col->col_target;
1502 cmd_format_command(cmd, ITS_CMD_MAPTI);
1503 cmd_format_devid(cmd, desc->cmd_desc_mapvi.its_dev->devid);
1504 cmd_format_id(cmd, desc->cmd_desc_mapvi.id);
1505 cmd_format_pid(cmd, desc->cmd_desc_mapvi.pid);
1506 cmd_format_col(cmd, desc->cmd_desc_mapvi.col->col_id);
1509 target = desc->cmd_desc_mapi.col->col_target;
1510 cmd_format_command(cmd, ITS_CMD_MAPI);
1511 cmd_format_devid(cmd, desc->cmd_desc_mapi.its_dev->devid);
1512 cmd_format_id(cmd, desc->cmd_desc_mapi.pid);
1513 cmd_format_col(cmd, desc->cmd_desc_mapi.col->col_id);
1516 target = desc->cmd_desc_inv.col->col_target;
1517 cmd_format_command(cmd, ITS_CMD_INV);
1518 cmd_format_devid(cmd, desc->cmd_desc_inv.its_dev->devid);
1519 cmd_format_id(cmd, desc->cmd_desc_inv.pid);
1521 case ITS_CMD_INVALL:
1522 cmd_format_command(cmd, ITS_CMD_INVALL);
1523 cmd_format_col(cmd, desc->cmd_desc_invall.col->col_id);
1526 panic("its_cmd_prepare: Invalid command: %x", cmd_type);
1533 its_cmd_send(device_t dev, struct its_cmd_desc *desc)
1535 struct gicv3_its_softc *sc;
1536 struct its_cmd *cmd, *cmd_sync, *cmd_write;
1537 struct its_col col_sync;
1538 struct its_cmd_desc desc_sync;
1539 uint64_t target, cwriter;
1541 sc = device_get_softc(dev);
1542 mtx_lock_spin(&sc->sc_its_cmd_lock);
1543 cmd = its_cmd_alloc_locked(dev);
1545 device_printf(dev, "could not allocate ITS command\n");
1546 mtx_unlock_spin(&sc->sc_its_cmd_lock);
1550 target = its_cmd_prepare(cmd, desc);
1551 its_cmd_sync(sc, cmd);
1553 if (target != ITS_TARGET_NONE) {
1554 cmd_sync = its_cmd_alloc_locked(dev);
1555 if (cmd_sync != NULL) {
1556 desc_sync.cmd_type = ITS_CMD_SYNC;
1557 col_sync.col_target = target;
1558 desc_sync.cmd_desc_sync.col = &col_sync;
1559 its_cmd_prepare(cmd_sync, &desc_sync);
1560 its_cmd_sync(sc, cmd_sync);
1564 /* Update GITS_CWRITER */
1565 cwriter = sc->sc_its_cmd_next_idx * sizeof(struct its_cmd);
1566 gic_its_write_8(sc, GITS_CWRITER, cwriter);
1567 cmd_write = &sc->sc_its_cmd_base[sc->sc_its_cmd_next_idx];
1568 mtx_unlock_spin(&sc->sc_its_cmd_lock);
1570 its_cmd_wait_completion(dev, cmd, cmd_write);
1575 /* Handlers to send commands */
1577 its_cmd_movi(device_t dev, struct gicv3_its_irqsrc *girq)
1579 struct gicv3_its_softc *sc;
1580 struct its_cmd_desc desc;
1581 struct its_col *col;
1583 sc = device_get_softc(dev);
1584 col = sc->sc_its_cols[CPU_FFS(&girq->gi_isrc.isrc_cpu) - 1];
1586 desc.cmd_type = ITS_CMD_MOVI;
1587 desc.cmd_desc_movi.its_dev = girq->gi_its_dev;
1588 desc.cmd_desc_movi.col = col;
1589 desc.cmd_desc_movi.id = girq->gi_id;
1591 its_cmd_send(dev, &desc);
1595 its_cmd_mapc(device_t dev, struct its_col *col, uint8_t valid)
1597 struct its_cmd_desc desc;
1599 desc.cmd_type = ITS_CMD_MAPC;
1600 desc.cmd_desc_mapc.col = col;
1602 * Valid bit set - map the collection.
1603 * Valid bit cleared - unmap the collection.
1605 desc.cmd_desc_mapc.valid = valid;
1607 its_cmd_send(dev, &desc);
1611 its_cmd_mapti(device_t dev, struct gicv3_its_irqsrc *girq)
1613 struct gicv3_its_softc *sc;
1614 struct its_cmd_desc desc;
1615 struct its_col *col;
1618 sc = device_get_softc(dev);
1620 col_id = CPU_FFS(&girq->gi_isrc.isrc_cpu) - 1;
1621 col = sc->sc_its_cols[col_id];
1623 desc.cmd_type = ITS_CMD_MAPTI;
1624 desc.cmd_desc_mapvi.its_dev = girq->gi_its_dev;
1625 desc.cmd_desc_mapvi.col = col;
1626 /* The EventID sent to the device */
1627 desc.cmd_desc_mapvi.id = girq->gi_id;
1628 /* The physical interrupt presented to softeware */
1629 desc.cmd_desc_mapvi.pid = girq->gi_lpi + GIC_FIRST_LPI;
1631 its_cmd_send(dev, &desc);
1635 its_cmd_mapd(device_t dev, struct its_dev *its_dev, uint8_t valid)
1637 struct its_cmd_desc desc;
1639 desc.cmd_type = ITS_CMD_MAPD;
1640 desc.cmd_desc_mapd.its_dev = its_dev;
1641 desc.cmd_desc_mapd.valid = valid;
1643 its_cmd_send(dev, &desc);
1647 its_cmd_inv(device_t dev, struct its_dev *its_dev,
1648 struct gicv3_its_irqsrc *girq)
1650 struct gicv3_its_softc *sc;
1651 struct its_cmd_desc desc;
1652 struct its_col *col;
1654 sc = device_get_softc(dev);
1655 col = sc->sc_its_cols[CPU_FFS(&girq->gi_isrc.isrc_cpu) - 1];
1657 desc.cmd_type = ITS_CMD_INV;
1658 /* The EventID sent to the device */
1659 desc.cmd_desc_inv.pid = girq->gi_id;
1660 desc.cmd_desc_inv.its_dev = its_dev;
1661 desc.cmd_desc_inv.col = col;
1663 its_cmd_send(dev, &desc);
1667 its_cmd_invall(device_t dev, struct its_col *col)
1669 struct its_cmd_desc desc;
1671 desc.cmd_type = ITS_CMD_INVALL;
1672 desc.cmd_desc_invall.col = col;
1674 its_cmd_send(dev, &desc);
1678 static device_probe_t gicv3_its_fdt_probe;
1679 static device_attach_t gicv3_its_fdt_attach;
1681 static device_method_t gicv3_its_fdt_methods[] = {
1682 /* Device interface */
1683 DEVMETHOD(device_probe, gicv3_its_fdt_probe),
1684 DEVMETHOD(device_attach, gicv3_its_fdt_attach),
1690 #define its_baseclasses its_fdt_baseclasses
1691 DEFINE_CLASS_1(its, gicv3_its_fdt_driver, gicv3_its_fdt_methods,
1692 sizeof(struct gicv3_its_softc), gicv3_its_driver);
1693 #undef its_baseclasses
1694 static devclass_t gicv3_its_fdt_devclass;
1696 EARLY_DRIVER_MODULE(its_fdt, gic, gicv3_its_fdt_driver,
1697 gicv3_its_fdt_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
1700 gicv3_its_fdt_probe(device_t dev)
1703 if (!ofw_bus_status_okay(dev))
1706 if (!ofw_bus_is_compatible(dev, "arm,gic-v3-its"))
1709 device_set_desc(dev, "ARM GIC Interrupt Translation Service");
1710 return (BUS_PROBE_DEFAULT);
1714 gicv3_its_fdt_attach(device_t dev)
1716 struct gicv3_its_softc *sc;
1720 sc = device_get_softc(dev);
1721 err = gicv3_its_attach(dev);
1725 /* Register this device as a interrupt controller */
1726 xref = OF_xref_from_node(ofw_bus_get_node(dev));
1727 sc->sc_pic = intr_pic_register(dev, xref);
1728 intr_pic_add_handler(device_get_parent(dev), sc->sc_pic,
1729 gicv3_its_intr, sc, sc->sc_irq_base, sc->sc_irq_length);
1731 /* Register this device to handle MSI interrupts */
1732 intr_msi_register(dev, xref);
1739 static device_probe_t gicv3_its_acpi_probe;
1740 static device_attach_t gicv3_its_acpi_attach;
1742 static device_method_t gicv3_its_acpi_methods[] = {
1743 /* Device interface */
1744 DEVMETHOD(device_probe, gicv3_its_acpi_probe),
1745 DEVMETHOD(device_attach, gicv3_its_acpi_attach),
1751 #define its_baseclasses its_acpi_baseclasses
1752 DEFINE_CLASS_1(its, gicv3_its_acpi_driver, gicv3_its_acpi_methods,
1753 sizeof(struct gicv3_its_softc), gicv3_its_driver);
1754 #undef its_baseclasses
1755 static devclass_t gicv3_its_acpi_devclass;
1757 EARLY_DRIVER_MODULE(its_acpi, gic, gicv3_its_acpi_driver,
1758 gicv3_its_acpi_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
1761 gicv3_its_acpi_probe(device_t dev)
1764 if (gic_get_bus(dev) != GIC_BUS_ACPI)
1767 if (gic_get_hw_rev(dev) < 3)
1770 device_set_desc(dev, "ARM GIC Interrupt Translation Service");
1771 return (BUS_PROBE_DEFAULT);
1775 gicv3_its_acpi_attach(device_t dev)
1777 struct gicv3_its_softc *sc;
1778 struct gic_v3_devinfo *di;
1781 sc = device_get_softc(dev);
1782 err = gicv3_its_attach(dev);
1786 di = device_get_ivars(dev);
1787 sc->sc_pic = intr_pic_register(dev, di->msi_xref);
1788 intr_pic_add_handler(device_get_parent(dev), sc->sc_pic,
1789 gicv3_its_intr, sc, sc->sc_irq_base, sc->sc_irq_length);
1791 /* Register this device to handle MSI interrupts */
1792 intr_msi_register(dev, di->msi_xref);