5 * Based on the s390 virtio bus code:
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
23 #include "sysemu/sysemu.h"
24 #include "hw/boards.h"
25 #include "monitor/monitor.h"
26 #include "hw/loader.h"
28 #include "hw/sysbus.h"
29 #include "sysemu/kvm.h"
30 #include "sysemu/device_tree.h"
33 #include "hw/ppc/spapr.h"
34 #include "hw/ppc/spapr_vio.h"
35 #include "hw/ppc/xics.h"
39 /* #define DEBUG_SPAPR */
42 #define dprintf(fmt, ...) \
43 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
45 #define dprintf(fmt, ...) \
49 static Property spapr_vio_props[] = {
50 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
51 DEFINE_PROP_END_OF_LIST(),
54 static char *spapr_vio_get_dev_name(DeviceState *qdev)
56 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
57 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
60 /* Device tree style name device@reg */
61 name = g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
66 static void spapr_vio_bus_class_init(ObjectClass *klass, void *data)
68 BusClass *k = BUS_CLASS(klass);
70 k->get_dev_path = spapr_vio_get_dev_name;
73 static const TypeInfo spapr_vio_bus_info = {
74 .name = TYPE_SPAPR_VIO_BUS,
76 .class_init = spapr_vio_bus_class_init,
77 .instance_size = sizeof(VIOsPAPRBus),
80 VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
83 VIOsPAPRDevice *dev = NULL;
85 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
86 dev = (VIOsPAPRDevice *)kid->child;
87 if (dev->reg == reg) {
95 static int vio_make_devnode(VIOsPAPRDevice *dev,
98 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
99 int vdevice_off, node_off, ret;
102 vdevice_off = fdt_path_offset(fdt, "/vdevice");
103 if (vdevice_off < 0) {
107 dt_name = spapr_vio_get_dev_name(DEVICE(dev));
108 node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
114 ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
120 ret = fdt_setprop_string(fdt, node_off, "device_type",
127 if (pc->dt_compatible) {
128 ret = fdt_setprop_string(fdt, node_off, "compatible",
136 uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};
138 ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
145 ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
151 ret = (pc->devnode)(dev, fdt, node_off);
163 static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
164 target_ulong opcode, target_ulong *args)
166 target_ulong reg = args[0];
167 target_ulong queue_addr = args[1];
168 target_ulong queue_len = args[2];
169 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
172 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
176 /* We can't grok a queue size bigger than 256M for now */
177 if (queue_len < 0x1000 || queue_len > 0x10000000) {
178 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
183 /* Check queue alignment */
184 if (queue_addr & 0xfff) {
185 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
189 /* Check if device supports CRQs */
190 if (!dev->crq.SendFunc) {
191 hcall_dprintf("Device does not support CRQ\n");
195 /* Already a queue ? */
196 if (dev->crq.qsize) {
197 hcall_dprintf("CRQ already registered\n");
200 dev->crq.qladdr = queue_addr;
201 dev->crq.qsize = queue_len;
204 dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
205 TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
206 reg, queue_addr, queue_len);
210 static target_ulong free_crq(VIOsPAPRDevice *dev)
216 dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg);
221 static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
222 target_ulong opcode, target_ulong *args)
224 target_ulong reg = args[0];
225 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
228 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
232 return free_crq(dev);
235 static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
236 target_ulong opcode, target_ulong *args)
238 target_ulong reg = args[0];
239 target_ulong msg_hi = args[1];
240 target_ulong msg_lo = args[2];
241 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
242 uint64_t crq_mangle[2];
245 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
248 crq_mangle[0] = cpu_to_be64(msg_hi);
249 crq_mangle[1] = cpu_to_be64(msg_lo);
251 if (dev->crq.SendFunc) {
252 return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
258 static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
259 target_ulong opcode, target_ulong *args)
261 target_ulong reg = args[0];
262 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
265 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
272 /* Returns negative error, 0 success, or positive: queue full */
273 int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
278 if (!dev->crq.qsize) {
279 fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
283 /* Maybe do a fast path for KVM just writing to the pages */
284 rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
292 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
300 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
305 dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
307 if (dev->signal_state & 1) {
308 qemu_irq_pulse(spapr_vio_qirq(dev));
314 /* "quiesce" handling */
316 static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
319 spapr_tce_reset(dev->tcet);
324 static void rtas_set_tce_bypass(PowerPCCPU *cpu, sPAPREnvironment *spapr,
326 uint32_t nargs, target_ulong args,
327 uint32_t nret, target_ulong rets)
329 VIOsPAPRBus *bus = spapr->vio_bus;
331 uint32_t unit, enable;
334 rtas_st(rets, 0, -3);
337 unit = rtas_ld(args, 0);
338 enable = rtas_ld(args, 1);
339 dev = spapr_vio_find_by_reg(bus, unit);
341 rtas_st(rets, 0, -3);
346 rtas_st(rets, 0, -3);
350 spapr_tce_set_bypass(dev->tcet, !!enable);
355 static void rtas_quiesce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
357 uint32_t nargs, target_ulong args,
358 uint32_t nret, target_ulong rets)
360 VIOsPAPRBus *bus = spapr->vio_bus;
362 VIOsPAPRDevice *dev = NULL;
365 rtas_st(rets, 0, -3);
369 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
370 dev = (VIOsPAPRDevice *)kid->child;
371 spapr_vio_quiesce_one(dev);
377 static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
379 VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
381 VIOsPAPRDevice *other;
384 * Check for a device other than the given one which is already
385 * using the requested address. We have to open code this because
386 * the given dev might already be in the list.
388 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
389 other = VIO_SPAPR_DEVICE(kid->child);
391 if (other != dev && other->reg == dev->reg) {
399 static void spapr_vio_busdev_reset(DeviceState *qdev)
401 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
402 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
404 /* Shut down the request queue and TCEs if necessary */
405 spapr_vio_quiesce_one(dev);
407 dev->signal_state = 0;
414 static int spapr_vio_busdev_init(DeviceState *qdev)
416 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
417 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
420 if (dev->reg != -1) {
422 * Explicitly assigned address, just verify that no-one else
423 * is using it. other mechanism). We have to open code this
424 * rather than using spapr_vio_find_by_reg() because sdev
425 * itself is already in the list.
427 VIOsPAPRDevice *other = reg_conflict(dev);
430 fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
431 object_get_typename(OBJECT(qdev)),
432 object_get_typename(OBJECT(&other->qdev)),
437 /* Need to assign an address */
438 VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
441 dev->reg = bus->next_reg++;
442 } while (reg_conflict(dev));
445 /* Don't overwrite ids assigned on the command line */
447 id = spapr_vio_get_dev_name(DEVICE(dev));
451 dev->irq = spapr_allocate_msi(dev->irq);
456 if (pc->rtce_window_size) {
457 uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;
458 dev->tcet = spapr_tce_new_table(qdev, liobn, pc->rtce_window_size);
459 address_space_init(&dev->as, spapr_tce_get_iommu(dev->tcet), qdev->id);
462 return pc->init(dev);
465 static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPREnvironment *spapr,
469 target_ulong reg = args[0];
470 target_ulong mode = args[1];
471 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
472 VIOsPAPRDeviceClass *pc;
478 pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
480 if (mode & ~pc->signal_mask) {
484 dev->signal_state = mode;
489 VIOsPAPRBus *spapr_vio_bus_init(void)
495 /* Create bridge device */
496 dev = qdev_create(NULL, "spapr-vio-bridge");
497 qdev_init_nofail(dev);
499 /* Create bus on bridge device */
501 qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
502 bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
503 bus->next_reg = 0x71000000;
506 spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
509 spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
510 spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
511 spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
512 spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
515 spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
516 spapr_rtas_register("quiesce", rtas_quiesce);
521 /* Represents sPAPR hcall VIO devices */
523 static int spapr_vio_bridge_init(SysBusDevice *dev)
529 static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
531 DeviceClass *dc = DEVICE_CLASS(klass);
532 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
534 k->init = spapr_vio_bridge_init;
538 static const TypeInfo spapr_vio_bridge_info = {
539 .name = "spapr-vio-bridge",
540 .parent = TYPE_SYS_BUS_DEVICE,
541 .instance_size = sizeof(SysBusDevice),
542 .class_init = spapr_vio_bridge_class_init,
545 static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
547 DeviceClass *k = DEVICE_CLASS(klass);
548 k->init = spapr_vio_busdev_init;
549 k->reset = spapr_vio_busdev_reset;
550 k->bus_type = TYPE_SPAPR_VIO_BUS;
551 k->props = spapr_vio_props;
554 static const TypeInfo spapr_vio_type_info = {
555 .name = TYPE_VIO_SPAPR_DEVICE,
556 .parent = TYPE_DEVICE,
557 .instance_size = sizeof(VIOsPAPRDevice),
559 .class_size = sizeof(VIOsPAPRDeviceClass),
560 .class_init = vio_spapr_device_class_init,
563 static void spapr_vio_register_types(void)
565 type_register_static(&spapr_vio_bus_info);
566 type_register_static(&spapr_vio_bridge_info);
567 type_register_static(&spapr_vio_type_info);
570 type_init(spapr_vio_register_types)
572 static int compare_reg(const void *p1, const void *p2)
574 VIOsPAPRDevice const *dev1, *dev2;
576 dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1;
577 dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2;
579 if (dev1->reg < dev2->reg) {
582 if (dev1->reg == dev2->reg) {
586 /* dev1->reg > dev2->reg */
590 int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
592 DeviceState *qdev, **qdevs;
596 /* Count qdevs on the bus list */
598 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
602 /* Copy out into an array of pointers */
603 qdevs = g_malloc(sizeof(qdev) * num);
605 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
606 qdevs[num++] = kid->child;
610 qsort(qdevs, num, sizeof(qdev), compare_reg);
612 /* Hack alert. Give the devices to libfdt in reverse order, we happen
613 * to know that will mean they are in forward order in the tree. */
614 for (i = num - 1; i >= 0; i--) {
615 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);
617 ret = vio_make_devnode(dev, fdt);
631 int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus)
637 dev = spapr_vty_get_default(bus);
641 offset = fdt_path_offset(fdt, "/chosen");
646 name = spapr_vio_get_dev_name(DEVICE(dev));
647 path = g_strdup_printf("/vdevice/%s", name);
649 ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);