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"
28 #include "sysemu/sysemu.h"
29 #include "hw/boards.h"
30 #include "hw/loader.h"
32 #include "hw/sysbus.h"
33 #include "sysemu/kvm.h"
34 #include "sysemu/device_tree.h"
36 #include "sysemu/qtest.h"
38 #include "hw/ppc/spapr.h"
39 #include "hw/ppc/spapr_vio.h"
40 #include "hw/ppc/xics.h"
41 #include "hw/ppc/fdt.h"
46 static void spapr_vio_getset_irq(Object
*obj
, Visitor
*v
, const char *name
,
47 void *opaque
, Error
**errp
)
49 Property
*prop
= opaque
;
50 uint32_t *ptr
= qdev_get_prop_ptr(DEVICE(obj
), prop
);
52 if (!qtest_enabled()) {
53 warn_report(TYPE_VIO_SPAPR_DEVICE
" '%s' property is deprecated", name
);
55 visit_type_uint32(v
, name
, ptr
, errp
);
58 static const PropertyInfo spapr_vio_irq_propinfo
= {
60 .get
= spapr_vio_getset_irq
,
61 .set
= spapr_vio_getset_irq
,
64 static Property spapr_vio_props
[] = {
65 DEFINE_PROP("irq", VIOsPAPRDevice
, irq
, spapr_vio_irq_propinfo
, uint32_t),
66 DEFINE_PROP_END_OF_LIST(),
69 static char *spapr_vio_get_dev_name(DeviceState
*qdev
)
71 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
72 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
74 /* Device tree style name device@reg */
75 return g_strdup_printf("%s@%x", pc
->dt_name
, dev
->reg
);
78 static void spapr_vio_bus_class_init(ObjectClass
*klass
, void *data
)
80 BusClass
*k
= BUS_CLASS(klass
);
82 k
->get_dev_path
= spapr_vio_get_dev_name
;
83 k
->get_fw_dev_path
= spapr_vio_get_dev_name
;
86 static const TypeInfo spapr_vio_bus_info
= {
87 .name
= TYPE_SPAPR_VIO_BUS
,
89 .class_init
= spapr_vio_bus_class_init
,
90 .instance_size
= sizeof(VIOsPAPRBus
),
93 VIOsPAPRDevice
*spapr_vio_find_by_reg(VIOsPAPRBus
*bus
, uint32_t reg
)
96 VIOsPAPRDevice
*dev
= NULL
;
98 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
99 dev
= (VIOsPAPRDevice
*)kid
->child
;
100 if (dev
->reg
== reg
) {
108 static int vio_make_devnode(VIOsPAPRDevice
*dev
,
111 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
112 int vdevice_off
, node_off
, ret
;
115 vdevice_off
= fdt_path_offset(fdt
, "/vdevice");
116 if (vdevice_off
< 0) {
120 dt_name
= spapr_vio_get_dev_name(DEVICE(dev
));
121 node_off
= fdt_add_subnode(fdt
, vdevice_off
, dt_name
);
127 ret
= fdt_setprop_cell(fdt
, node_off
, "reg", dev
->reg
);
133 ret
= fdt_setprop_string(fdt
, node_off
, "device_type",
140 if (pc
->dt_compatible
) {
141 ret
= fdt_setprop_string(fdt
, node_off
, "compatible",
149 uint32_t ints_prop
[2];
151 spapr_dt_xics_irq(ints_prop
, dev
->irq
, false);
152 ret
= fdt_setprop(fdt
, node_off
, "interrupts", ints_prop
,
159 ret
= spapr_tcet_dma_dt(fdt
, node_off
, "ibm,my-dma-window", dev
->tcet
);
165 ret
= (pc
->devnode
)(dev
, fdt
, node_off
);
177 static target_ulong
h_reg_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
178 target_ulong opcode
, target_ulong
*args
)
180 target_ulong reg
= args
[0];
181 target_ulong queue_addr
= args
[1];
182 target_ulong queue_len
= args
[2];
183 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
186 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
190 /* We can't grok a queue size bigger than 256M for now */
191 if (queue_len
< 0x1000 || queue_len
> 0x10000000) {
192 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
197 /* Check queue alignment */
198 if (queue_addr
& 0xfff) {
199 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx
")\n", queue_addr
);
203 /* Check if device supports CRQs */
204 if (!dev
->crq
.SendFunc
) {
205 hcall_dprintf("Device does not support CRQ\n");
209 /* Already a queue ? */
210 if (dev
->crq
.qsize
) {
211 hcall_dprintf("CRQ already registered\n");
214 dev
->crq
.qladdr
= queue_addr
;
215 dev
->crq
.qsize
= queue_len
;
218 trace_spapr_vio_h_reg_crq(reg
, queue_addr
, queue_len
);
222 static target_ulong
free_crq(VIOsPAPRDevice
*dev
)
228 trace_spapr_vio_free_crq(dev
->reg
);
233 static target_ulong
h_free_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
234 target_ulong opcode
, target_ulong
*args
)
236 target_ulong reg
= args
[0];
237 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
240 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
244 return free_crq(dev
);
247 static target_ulong
h_send_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
248 target_ulong opcode
, target_ulong
*args
)
250 target_ulong reg
= args
[0];
251 target_ulong msg_hi
= args
[1];
252 target_ulong msg_lo
= args
[2];
253 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
254 uint64_t crq_mangle
[2];
257 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
260 crq_mangle
[0] = cpu_to_be64(msg_hi
);
261 crq_mangle
[1] = cpu_to_be64(msg_lo
);
263 if (dev
->crq
.SendFunc
) {
264 return dev
->crq
.SendFunc(dev
, (uint8_t *)crq_mangle
);
270 static target_ulong
h_enable_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
271 target_ulong opcode
, target_ulong
*args
)
273 target_ulong reg
= args
[0];
274 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
277 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
284 /* Returns negative error, 0 success, or positive: queue full */
285 int spapr_vio_send_crq(VIOsPAPRDevice
*dev
, uint8_t *crq
)
290 if (!dev
->crq
.qsize
) {
291 error_report("spapr_vio_send_creq on uninitialized queue");
295 /* Maybe do a fast path for KVM just writing to the pages */
296 rc
= spapr_vio_dma_read(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, &byte
, 1);
304 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
+ 8,
312 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, crq
, 8);
317 dev
->crq
.qnext
= (dev
->crq
.qnext
+ 16) % dev
->crq
.qsize
;
319 if (dev
->signal_state
& 1) {
320 qemu_irq_pulse(spapr_vio_qirq(dev
));
326 /* "quiesce" handling */
328 static void spapr_vio_quiesce_one(VIOsPAPRDevice
*dev
)
331 device_reset(DEVICE(dev
->tcet
));
336 void spapr_vio_set_bypass(VIOsPAPRDevice
*dev
, bool bypass
)
342 memory_region_set_enabled(&dev
->mrbypass
, bypass
);
343 memory_region_set_enabled(spapr_tce_get_iommu(dev
->tcet
), !bypass
);
345 dev
->tcet
->bypass
= bypass
;
348 static void rtas_set_tce_bypass(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
350 uint32_t nargs
, target_ulong args
,
351 uint32_t nret
, target_ulong rets
)
353 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
355 uint32_t unit
, enable
;
358 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
361 unit
= rtas_ld(args
, 0);
362 enable
= rtas_ld(args
, 1);
363 dev
= spapr_vio_find_by_reg(bus
, unit
);
365 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
370 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
374 spapr_vio_set_bypass(dev
, !!enable
);
376 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
379 static void rtas_quiesce(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
381 uint32_t nargs
, target_ulong args
,
382 uint32_t nret
, target_ulong rets
)
384 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
386 VIOsPAPRDevice
*dev
= NULL
;
389 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
393 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
394 dev
= (VIOsPAPRDevice
*)kid
->child
;
395 spapr_vio_quiesce_one(dev
);
398 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
401 static VIOsPAPRDevice
*reg_conflict(VIOsPAPRDevice
*dev
)
403 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
405 VIOsPAPRDevice
*other
;
408 * Check for a device other than the given one which is already
409 * using the requested address. We have to open code this because
410 * the given dev might already be in the list.
412 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
413 other
= VIO_SPAPR_DEVICE(kid
->child
);
415 if (other
!= dev
&& other
->reg
== dev
->reg
) {
423 static void spapr_vio_busdev_reset(DeviceState
*qdev
)
425 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
426 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
428 /* Shut down the request queue and TCEs if necessary */
429 spapr_vio_quiesce_one(dev
);
431 dev
->signal_state
= 0;
433 spapr_vio_set_bypass(dev
, false);
439 static void spapr_vio_busdev_realize(DeviceState
*qdev
, Error
**errp
)
441 sPAPRMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
442 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)qdev
;
443 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
445 Error
*local_err
= NULL
;
447 if (dev
->reg
!= -1) {
449 * Explicitly assigned address, just verify that no-one else
450 * is using it. other mechanism). We have to open code this
451 * rather than using spapr_vio_find_by_reg() because sdev
452 * itself is already in the list.
454 VIOsPAPRDevice
*other
= reg_conflict(dev
);
457 error_setg(errp
, "%s and %s devices conflict at address %#x",
458 object_get_typename(OBJECT(qdev
)),
459 object_get_typename(OBJECT(&other
->qdev
)),
464 /* Need to assign an address */
465 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
468 dev
->reg
= bus
->next_reg
++;
469 } while (reg_conflict(dev
));
472 /* Don't overwrite ids assigned on the command line */
474 id
= spapr_vio_get_dev_name(DEVICE(dev
));
479 dev
->irq
= spapr_irq_findone(spapr
, &local_err
);
481 error_propagate(errp
, local_err
);
486 spapr_irq_claim(spapr
, dev
->irq
, false, &local_err
);
488 error_propagate(errp
, local_err
);
492 if (pc
->rtce_window_size
) {
493 uint32_t liobn
= SPAPR_VIO_LIOBN(dev
->reg
);
495 memory_region_init(&dev
->mrroot
, OBJECT(dev
), "iommu-spapr-root",
497 memory_region_init_alias(&dev
->mrbypass
, OBJECT(dev
),
498 "iommu-spapr-bypass", get_system_memory(),
500 memory_region_add_subregion_overlap(&dev
->mrroot
, 0, &dev
->mrbypass
, 1);
501 address_space_init(&dev
->as
, &dev
->mrroot
, qdev
->id
);
503 dev
->tcet
= spapr_tce_new_table(qdev
, liobn
);
504 spapr_tce_table_enable(dev
->tcet
, SPAPR_TCE_PAGE_SHIFT
, 0,
505 pc
->rtce_window_size
>> SPAPR_TCE_PAGE_SHIFT
);
506 dev
->tcet
->vdev
= dev
;
507 memory_region_add_subregion_overlap(&dev
->mrroot
, 0,
508 spapr_tce_get_iommu(dev
->tcet
), 2);
511 pc
->realize(dev
, errp
);
514 static target_ulong
h_vio_signal(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
518 target_ulong reg
= args
[0];
519 target_ulong mode
= args
[1];
520 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
521 VIOsPAPRDeviceClass
*pc
;
527 pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
529 if (mode
& ~pc
->signal_mask
) {
533 dev
->signal_state
= mode
;
538 VIOsPAPRBus
*spapr_vio_bus_init(void)
544 /* Create bridge device */
545 dev
= qdev_create(NULL
, TYPE_SPAPR_VIO_BRIDGE
);
546 qdev_init_nofail(dev
);
548 /* Create bus on bridge device */
549 qbus
= qbus_create(TYPE_SPAPR_VIO_BUS
, dev
, "spapr-vio");
550 bus
= SPAPR_VIO_BUS(qbus
);
551 bus
->next_reg
= 0x71000000;
554 spapr_register_hypercall(H_VIO_SIGNAL
, h_vio_signal
);
557 spapr_register_hypercall(H_REG_CRQ
, h_reg_crq
);
558 spapr_register_hypercall(H_FREE_CRQ
, h_free_crq
);
559 spapr_register_hypercall(H_SEND_CRQ
, h_send_crq
);
560 spapr_register_hypercall(H_ENABLE_CRQ
, h_enable_crq
);
563 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS
, "ibm,set-tce-bypass",
564 rtas_set_tce_bypass
);
565 spapr_rtas_register(RTAS_QUIESCE
, "quiesce", rtas_quiesce
);
570 static void spapr_vio_bridge_class_init(ObjectClass
*klass
, void *data
)
572 DeviceClass
*dc
= DEVICE_CLASS(klass
);
574 dc
->fw_name
= "vdevice";
577 static const TypeInfo spapr_vio_bridge_info
= {
578 .name
= TYPE_SPAPR_VIO_BRIDGE
,
579 .parent
= TYPE_SYS_BUS_DEVICE
,
580 .class_init
= spapr_vio_bridge_class_init
,
583 const VMStateDescription vmstate_spapr_vio
= {
586 .minimum_version_id
= 1,
587 .fields
= (VMStateField
[]) {
589 VMSTATE_UINT32_EQUAL(reg
, VIOsPAPRDevice
, NULL
),
590 VMSTATE_UINT32_EQUAL(irq
, VIOsPAPRDevice
, NULL
),
592 /* General VIO device state */
593 VMSTATE_UINT64(signal_state
, VIOsPAPRDevice
),
594 VMSTATE_UINT64(crq
.qladdr
, VIOsPAPRDevice
),
595 VMSTATE_UINT32(crq
.qsize
, VIOsPAPRDevice
),
596 VMSTATE_UINT32(crq
.qnext
, VIOsPAPRDevice
),
598 VMSTATE_END_OF_LIST()
602 static void vio_spapr_device_class_init(ObjectClass
*klass
, void *data
)
604 DeviceClass
*k
= DEVICE_CLASS(klass
);
605 k
->realize
= spapr_vio_busdev_realize
;
606 k
->reset
= spapr_vio_busdev_reset
;
607 k
->bus_type
= TYPE_SPAPR_VIO_BUS
;
608 k
->props
= spapr_vio_props
;
611 static const TypeInfo spapr_vio_type_info
= {
612 .name
= TYPE_VIO_SPAPR_DEVICE
,
613 .parent
= TYPE_DEVICE
,
614 .instance_size
= sizeof(VIOsPAPRDevice
),
616 .class_size
= sizeof(VIOsPAPRDeviceClass
),
617 .class_init
= vio_spapr_device_class_init
,
620 static void spapr_vio_register_types(void)
622 type_register_static(&spapr_vio_bus_info
);
623 type_register_static(&spapr_vio_bridge_info
);
624 type_register_static(&spapr_vio_type_info
);
627 type_init(spapr_vio_register_types
)
629 static int compare_reg(const void *p1
, const void *p2
)
631 VIOsPAPRDevice
const *dev1
, *dev2
;
633 dev1
= (VIOsPAPRDevice
*)*(DeviceState
**)p1
;
634 dev2
= (VIOsPAPRDevice
*)*(DeviceState
**)p2
;
636 if (dev1
->reg
< dev2
->reg
) {
639 if (dev1
->reg
== dev2
->reg
) {
643 /* dev1->reg > dev2->reg */
647 void spapr_dt_vdevice(VIOsPAPRBus
*bus
, void *fdt
)
649 DeviceState
*qdev
, **qdevs
;
654 _FDT(node
= fdt_add_subnode(fdt
, 0, "vdevice"));
656 _FDT(fdt_setprop_string(fdt
, node
, "device_type", "vdevice"));
657 _FDT(fdt_setprop_string(fdt
, node
, "compatible", "IBM,vdevice"));
658 _FDT(fdt_setprop_cell(fdt
, node
, "#address-cells", 1));
659 _FDT(fdt_setprop_cell(fdt
, node
, "#size-cells", 0));
660 _FDT(fdt_setprop_cell(fdt
, node
, "#interrupt-cells", 2));
661 _FDT(fdt_setprop(fdt
, node
, "interrupt-controller", NULL
, 0));
663 /* Count qdevs on the bus list */
665 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
669 /* Copy out into an array of pointers */
670 qdevs
= g_malloc(sizeof(qdev
) * num
);
672 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
673 qdevs
[num
++] = kid
->child
;
677 qsort(qdevs
, num
, sizeof(qdev
), compare_reg
);
679 /* Hack alert. Give the devices to libfdt in reverse order, we happen
680 * to know that will mean they are in forward order in the tree. */
681 for (i
= num
- 1; i
>= 0; i
--) {
682 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)(qdevs
[i
]);
683 VIOsPAPRDeviceClass
*vdc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
685 ret
= vio_make_devnode(dev
, fdt
);
687 error_report("Couldn't create device node /vdevice/%s@%"PRIx32
,
688 vdc
->dt_name
, dev
->reg
);
696 gchar
*spapr_vio_stdout_path(VIOsPAPRBus
*bus
)
701 dev
= spapr_vty_get_default(bus
);
706 name
= spapr_vio_get_dev_name(DEVICE(dev
));
707 path
= g_strdup_printf("/vdevice/%s", name
);