4 * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
5 * Based on the s390 virtio bus code:
6 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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/>.
22 #include "qemu/osdep.h"
23 #include "qemu/error-report.h"
24 #include "qapi/error.h"
25 #include "qapi/visitor.h"
27 #include "hw/loader.h"
29 #include "hw/sysbus.h"
30 #include "sysemu/kvm.h"
31 #include "sysemu/device_tree.h"
33 #include "migration/vmstate.h"
34 #include "sysemu/qtest.h"
36 #include "hw/ppc/spapr.h"
37 #include "hw/ppc/spapr_vio.h"
38 #include "hw/ppc/fdt.h"
43 #define SPAPR_VIO_REG_BASE 0x71000000
45 static char *spapr_vio_get_dev_name(DeviceState
*qdev
)
47 SpaprVioDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
48 SpaprVioDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
50 /* Device tree style name device@reg */
51 return g_strdup_printf("%s@%x", pc
->dt_name
, dev
->reg
);
54 static void spapr_vio_bus_class_init(ObjectClass
*klass
, void *data
)
56 BusClass
*k
= BUS_CLASS(klass
);
58 k
->get_dev_path
= spapr_vio_get_dev_name
;
59 k
->get_fw_dev_path
= spapr_vio_get_dev_name
;
62 static const TypeInfo spapr_vio_bus_info
= {
63 .name
= TYPE_SPAPR_VIO_BUS
,
65 .class_init
= spapr_vio_bus_class_init
,
66 .instance_size
= sizeof(SpaprVioBus
),
69 SpaprVioDevice
*spapr_vio_find_by_reg(SpaprVioBus
*bus
, uint32_t reg
)
72 SpaprVioDevice
*dev
= NULL
;
74 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
75 dev
= (SpaprVioDevice
*)kid
->child
;
76 if (dev
->reg
== reg
) {
84 static int vio_make_devnode(SpaprVioDevice
*dev
,
87 SpaprVioDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
88 int vdevice_off
, node_off
, ret
;
91 vdevice_off
= fdt_path_offset(fdt
, "/vdevice");
92 if (vdevice_off
< 0) {
96 dt_name
= spapr_vio_get_dev_name(DEVICE(dev
));
97 node_off
= fdt_add_subnode(fdt
, vdevice_off
, dt_name
);
103 ret
= fdt_setprop_cell(fdt
, node_off
, "reg", dev
->reg
);
109 ret
= fdt_setprop_string(fdt
, node_off
, "device_type",
116 if (pc
->dt_compatible
) {
117 ret
= fdt_setprop_string(fdt
, node_off
, "compatible",
125 uint32_t ints_prop
[2];
127 spapr_dt_irq(ints_prop
, dev
->irq
, false);
128 ret
= fdt_setprop(fdt
, node_off
, "interrupts", ints_prop
,
135 ret
= spapr_tcet_dma_dt(fdt
, node_off
, "ibm,my-dma-window", dev
->tcet
);
141 ret
= (pc
->devnode
)(dev
, fdt
, node_off
);
153 static target_ulong
h_reg_crq(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
154 target_ulong opcode
, target_ulong
*args
)
156 target_ulong reg
= args
[0];
157 target_ulong queue_addr
= args
[1];
158 target_ulong queue_len
= args
[2];
159 SpaprVioDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
162 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
166 /* We can't grok a queue size bigger than 256M for now */
167 if (queue_len
< 0x1000 || queue_len
> 0x10000000) {
168 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
173 /* Check queue alignment */
174 if (queue_addr
& 0xfff) {
175 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx
")\n", queue_addr
);
179 /* Check if device supports CRQs */
180 if (!dev
->crq
.SendFunc
) {
181 hcall_dprintf("Device does not support CRQ\n");
185 /* Already a queue ? */
186 if (dev
->crq
.qsize
) {
187 hcall_dprintf("CRQ already registered\n");
190 dev
->crq
.qladdr
= queue_addr
;
191 dev
->crq
.qsize
= queue_len
;
194 trace_spapr_vio_h_reg_crq(reg
, queue_addr
, queue_len
);
198 static target_ulong
free_crq(SpaprVioDevice
*dev
)
204 trace_spapr_vio_free_crq(dev
->reg
);
209 static target_ulong
h_free_crq(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
210 target_ulong opcode
, target_ulong
*args
)
212 target_ulong reg
= args
[0];
213 SpaprVioDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
216 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
220 return free_crq(dev
);
223 static target_ulong
h_send_crq(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
224 target_ulong opcode
, target_ulong
*args
)
226 target_ulong reg
= args
[0];
227 target_ulong msg_hi
= args
[1];
228 target_ulong msg_lo
= args
[2];
229 SpaprVioDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
230 uint64_t crq_mangle
[2];
233 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
236 crq_mangle
[0] = cpu_to_be64(msg_hi
);
237 crq_mangle
[1] = cpu_to_be64(msg_lo
);
239 if (dev
->crq
.SendFunc
) {
240 return dev
->crq
.SendFunc(dev
, (uint8_t *)crq_mangle
);
246 static target_ulong
h_enable_crq(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
247 target_ulong opcode
, target_ulong
*args
)
249 target_ulong reg
= args
[0];
250 SpaprVioDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
253 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
260 /* Returns negative error, 0 success, or positive: queue full */
261 int spapr_vio_send_crq(SpaprVioDevice
*dev
, uint8_t *crq
)
266 if (!dev
->crq
.qsize
) {
267 error_report("spapr_vio_send_creq on uninitialized queue");
271 /* Maybe do a fast path for KVM just writing to the pages */
272 rc
= spapr_vio_dma_read(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, &byte
, 1);
280 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
+ 8,
288 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, crq
, 8);
293 dev
->crq
.qnext
= (dev
->crq
.qnext
+ 16) % dev
->crq
.qsize
;
295 if (dev
->signal_state
& 1) {
296 spapr_vio_irq_pulse(dev
);
302 /* "quiesce" handling */
304 static void spapr_vio_quiesce_one(SpaprVioDevice
*dev
)
307 device_reset(DEVICE(dev
->tcet
));
312 void spapr_vio_set_bypass(SpaprVioDevice
*dev
, bool bypass
)
318 memory_region_set_enabled(&dev
->mrbypass
, bypass
);
319 memory_region_set_enabled(spapr_tce_get_iommu(dev
->tcet
), !bypass
);
321 dev
->tcet
->bypass
= bypass
;
324 static void rtas_set_tce_bypass(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
326 uint32_t nargs
, target_ulong args
,
327 uint32_t nret
, target_ulong rets
)
329 SpaprVioBus
*bus
= spapr
->vio_bus
;
331 uint32_t unit
, enable
;
334 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
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, RTAS_OUT_PARAM_ERROR
);
346 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
350 spapr_vio_set_bypass(dev
, !!enable
);
352 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
355 static void rtas_quiesce(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
357 uint32_t nargs
, target_ulong args
,
358 uint32_t nret
, target_ulong rets
)
360 SpaprVioBus
*bus
= spapr
->vio_bus
;
362 SpaprVioDevice
*dev
= NULL
;
365 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
369 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
370 dev
= (SpaprVioDevice
*)kid
->child
;
371 spapr_vio_quiesce_one(dev
);
374 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
377 static SpaprVioDevice
*reg_conflict(SpaprVioDevice
*dev
)
379 SpaprVioBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
381 SpaprVioDevice
*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 SpaprVioDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
402 SpaprVioDeviceClass
*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;
409 spapr_vio_set_bypass(dev
, false);
416 * The register property of a VIO device is defined in livirt using
417 * 0x1000 as a base register number plus a 0x1000 increment. For the
418 * VIO tty device, the base number is changed to 0x30000000. QEMU uses
419 * a base register number of 0x71000000 and then a simple increment.
421 * The formula below tries to compute a unique index number from the
422 * register value that will be used to define the IRQ number of the
425 * A maximum of 256 VIO devices is covered. Collisions are possible
426 * but they will be detected when the IRQ is claimed.
428 static inline uint32_t spapr_vio_reg_to_irq(uint32_t reg
)
432 if (reg
>= SPAPR_VIO_REG_BASE
) {
434 * VIO device register values when allocated by QEMU. For
435 * these, we simply mask the high bits to fit the overall
436 * range: [0x00 - 0xff].
438 * The nvram VIO device (reg=0x71000000) is a static device of
439 * the pseries machine and so is always allocated by QEMU. Its
444 } else if (reg
>= 0x30000000) {
446 * VIO tty devices register values, when allocated by livirt,
447 * are mapped in range [0xf0 - 0xff], gives us a maximum of 16
450 irq
= 0xf0 | ((reg
>> 12) & 0xf);
454 * Other VIO devices register values, when allocated by
455 * livirt, should be mapped in range [0x00 - 0xef]. Conflicts
456 * will be detected when IRQ is claimed.
458 irq
= (reg
>> 12) & 0xff;
461 return SPAPR_IRQ_VIO
| irq
;
464 static void spapr_vio_busdev_realize(DeviceState
*qdev
, Error
**errp
)
466 SpaprMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
467 SpaprVioDevice
*dev
= (SpaprVioDevice
*)qdev
;
468 SpaprVioDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
470 Error
*local_err
= NULL
;
472 if (dev
->reg
!= -1) {
474 * Explicitly assigned address, just verify that no-one else
475 * is using it. other mechanism). We have to open code this
476 * rather than using spapr_vio_find_by_reg() because sdev
477 * itself is already in the list.
479 SpaprVioDevice
*other
= reg_conflict(dev
);
482 error_setg(errp
, "%s and %s devices conflict at address %#x",
483 object_get_typename(OBJECT(qdev
)),
484 object_get_typename(OBJECT(&other
->qdev
)),
489 /* Need to assign an address */
490 SpaprVioBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
493 dev
->reg
= bus
->next_reg
++;
494 } while (reg_conflict(dev
));
497 /* Don't overwrite ids assigned on the command line */
499 id
= spapr_vio_get_dev_name(DEVICE(dev
));
503 dev
->irq
= spapr_vio_reg_to_irq(dev
->reg
);
505 if (SPAPR_MACHINE_GET_CLASS(spapr
)->legacy_irq_allocation
) {
506 dev
->irq
= spapr_irq_findone(spapr
, &local_err
);
508 error_propagate(errp
, local_err
);
513 spapr_irq_claim(spapr
, dev
->irq
, false, &local_err
);
515 error_propagate(errp
, local_err
);
519 if (pc
->rtce_window_size
) {
520 uint32_t liobn
= SPAPR_VIO_LIOBN(dev
->reg
);
522 memory_region_init(&dev
->mrroot
, OBJECT(dev
), "iommu-spapr-root",
524 memory_region_init_alias(&dev
->mrbypass
, OBJECT(dev
),
525 "iommu-spapr-bypass", get_system_memory(),
527 memory_region_add_subregion_overlap(&dev
->mrroot
, 0, &dev
->mrbypass
, 1);
528 address_space_init(&dev
->as
, &dev
->mrroot
, qdev
->id
);
530 dev
->tcet
= spapr_tce_new_table(qdev
, liobn
);
531 spapr_tce_table_enable(dev
->tcet
, SPAPR_TCE_PAGE_SHIFT
, 0,
532 pc
->rtce_window_size
>> SPAPR_TCE_PAGE_SHIFT
);
533 dev
->tcet
->vdev
= dev
;
534 memory_region_add_subregion_overlap(&dev
->mrroot
, 0,
535 spapr_tce_get_iommu(dev
->tcet
), 2);
538 pc
->realize(dev
, errp
);
541 static target_ulong
h_vio_signal(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
545 target_ulong reg
= args
[0];
546 target_ulong mode
= args
[1];
547 SpaprVioDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
548 SpaprVioDeviceClass
*pc
;
554 pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
556 if (mode
& ~pc
->signal_mask
) {
560 dev
->signal_state
= mode
;
565 SpaprVioBus
*spapr_vio_bus_init(void)
571 /* Create bridge device */
572 dev
= qdev_create(NULL
, TYPE_SPAPR_VIO_BRIDGE
);
573 qdev_init_nofail(dev
);
575 /* Create bus on bridge device */
576 qbus
= qbus_create(TYPE_SPAPR_VIO_BUS
, dev
, "spapr-vio");
577 bus
= SPAPR_VIO_BUS(qbus
);
578 bus
->next_reg
= SPAPR_VIO_REG_BASE
;
581 spapr_register_hypercall(H_VIO_SIGNAL
, h_vio_signal
);
584 spapr_register_hypercall(H_REG_CRQ
, h_reg_crq
);
585 spapr_register_hypercall(H_FREE_CRQ
, h_free_crq
);
586 spapr_register_hypercall(H_SEND_CRQ
, h_send_crq
);
587 spapr_register_hypercall(H_ENABLE_CRQ
, h_enable_crq
);
590 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS
, "ibm,set-tce-bypass",
591 rtas_set_tce_bypass
);
592 spapr_rtas_register(RTAS_QUIESCE
, "quiesce", rtas_quiesce
);
597 static void spapr_vio_bridge_class_init(ObjectClass
*klass
, void *data
)
599 DeviceClass
*dc
= DEVICE_CLASS(klass
);
601 dc
->fw_name
= "vdevice";
604 static const TypeInfo spapr_vio_bridge_info
= {
605 .name
= TYPE_SPAPR_VIO_BRIDGE
,
606 .parent
= TYPE_SYS_BUS_DEVICE
,
607 .class_init
= spapr_vio_bridge_class_init
,
610 const VMStateDescription vmstate_spapr_vio
= {
613 .minimum_version_id
= 1,
614 .fields
= (VMStateField
[]) {
616 VMSTATE_UINT32_EQUAL(reg
, SpaprVioDevice
, NULL
),
617 VMSTATE_UINT32_EQUAL(irq
, SpaprVioDevice
, NULL
),
619 /* General VIO device state */
620 VMSTATE_UINT64(signal_state
, SpaprVioDevice
),
621 VMSTATE_UINT64(crq
.qladdr
, SpaprVioDevice
),
622 VMSTATE_UINT32(crq
.qsize
, SpaprVioDevice
),
623 VMSTATE_UINT32(crq
.qnext
, SpaprVioDevice
),
625 VMSTATE_END_OF_LIST()
629 static void vio_spapr_device_class_init(ObjectClass
*klass
, void *data
)
631 DeviceClass
*k
= DEVICE_CLASS(klass
);
632 k
->realize
= spapr_vio_busdev_realize
;
633 k
->reset
= spapr_vio_busdev_reset
;
634 k
->bus_type
= TYPE_SPAPR_VIO_BUS
;
637 static const TypeInfo spapr_vio_type_info
= {
638 .name
= TYPE_VIO_SPAPR_DEVICE
,
639 .parent
= TYPE_DEVICE
,
640 .instance_size
= sizeof(SpaprVioDevice
),
642 .class_size
= sizeof(SpaprVioDeviceClass
),
643 .class_init
= vio_spapr_device_class_init
,
646 static void spapr_vio_register_types(void)
648 type_register_static(&spapr_vio_bus_info
);
649 type_register_static(&spapr_vio_bridge_info
);
650 type_register_static(&spapr_vio_type_info
);
653 type_init(spapr_vio_register_types
)
655 static int compare_reg(const void *p1
, const void *p2
)
657 SpaprVioDevice
const *dev1
, *dev2
;
659 dev1
= (SpaprVioDevice
*)*(DeviceState
**)p1
;
660 dev2
= (SpaprVioDevice
*)*(DeviceState
**)p2
;
662 if (dev1
->reg
< dev2
->reg
) {
665 if (dev1
->reg
== dev2
->reg
) {
669 /* dev1->reg > dev2->reg */
673 void spapr_dt_vdevice(SpaprVioBus
*bus
, void *fdt
)
675 DeviceState
*qdev
, **qdevs
;
680 _FDT(node
= fdt_add_subnode(fdt
, 0, "vdevice"));
682 _FDT(fdt_setprop_string(fdt
, node
, "device_type", "vdevice"));
683 _FDT(fdt_setprop_string(fdt
, node
, "compatible", "IBM,vdevice"));
684 _FDT(fdt_setprop_cell(fdt
, node
, "#address-cells", 1));
685 _FDT(fdt_setprop_cell(fdt
, node
, "#size-cells", 0));
686 _FDT(fdt_setprop_cell(fdt
, node
, "#interrupt-cells", 2));
687 _FDT(fdt_setprop(fdt
, node
, "interrupt-controller", NULL
, 0));
689 /* Count qdevs on the bus list */
691 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
695 /* Copy out into an array of pointers */
696 qdevs
= g_new(DeviceState
*, num
);
698 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
699 qdevs
[num
++] = kid
->child
;
703 qsort(qdevs
, num
, sizeof(qdev
), compare_reg
);
705 /* Hack alert. Give the devices to libfdt in reverse order, we happen
706 * to know that will mean they are in forward order in the tree. */
707 for (i
= num
- 1; i
>= 0; i
--) {
708 SpaprVioDevice
*dev
= (SpaprVioDevice
*)(qdevs
[i
]);
709 SpaprVioDeviceClass
*vdc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
711 ret
= vio_make_devnode(dev
, fdt
);
713 error_report("Couldn't create device node /vdevice/%s@%"PRIx32
,
714 vdc
->dt_name
, dev
->reg
);
722 gchar
*spapr_vio_stdout_path(SpaprVioBus
*bus
)
727 dev
= spapr_vty_get_default(bus
);
732 name
= spapr_vio_get_dev_name(DEVICE(dev
));
733 path
= g_strdup_printf("/vdevice/%s", name
);