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/>.
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
;
71 k
->get_fw_dev_path
= spapr_vio_get_dev_name
;
74 static const TypeInfo spapr_vio_bus_info
= {
75 .name
= TYPE_SPAPR_VIO_BUS
,
77 .class_init
= spapr_vio_bus_class_init
,
78 .instance_size
= sizeof(VIOsPAPRBus
),
81 VIOsPAPRDevice
*spapr_vio_find_by_reg(VIOsPAPRBus
*bus
, uint32_t reg
)
84 VIOsPAPRDevice
*dev
= NULL
;
86 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
87 dev
= (VIOsPAPRDevice
*)kid
->child
;
88 if (dev
->reg
== reg
) {
96 static int vio_make_devnode(VIOsPAPRDevice
*dev
,
99 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
100 int vdevice_off
, node_off
, ret
;
103 vdevice_off
= fdt_path_offset(fdt
, "/vdevice");
104 if (vdevice_off
< 0) {
108 dt_name
= spapr_vio_get_dev_name(DEVICE(dev
));
109 node_off
= fdt_add_subnode(fdt
, vdevice_off
, dt_name
);
115 ret
= fdt_setprop_cell(fdt
, node_off
, "reg", dev
->reg
);
121 ret
= fdt_setprop_string(fdt
, node_off
, "device_type",
128 if (pc
->dt_compatible
) {
129 ret
= fdt_setprop_string(fdt
, node_off
, "compatible",
137 uint32_t ints_prop
[] = {cpu_to_be32(dev
->irq
), 0};
139 ret
= fdt_setprop(fdt
, node_off
, "interrupts", ints_prop
,
146 ret
= spapr_tcet_dma_dt(fdt
, node_off
, "ibm,my-dma-window", dev
->tcet
);
152 ret
= (pc
->devnode
)(dev
, fdt
, node_off
);
164 static target_ulong
h_reg_crq(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
165 target_ulong opcode
, target_ulong
*args
)
167 target_ulong reg
= args
[0];
168 target_ulong queue_addr
= args
[1];
169 target_ulong queue_len
= args
[2];
170 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
173 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
177 /* We can't grok a queue size bigger than 256M for now */
178 if (queue_len
< 0x1000 || queue_len
> 0x10000000) {
179 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
184 /* Check queue alignment */
185 if (queue_addr
& 0xfff) {
186 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx
")\n", queue_addr
);
190 /* Check if device supports CRQs */
191 if (!dev
->crq
.SendFunc
) {
192 hcall_dprintf("Device does not support CRQ\n");
196 /* Already a queue ? */
197 if (dev
->crq
.qsize
) {
198 hcall_dprintf("CRQ already registered\n");
201 dev
->crq
.qladdr
= queue_addr
;
202 dev
->crq
.qsize
= queue_len
;
205 DPRINTF("CRQ for dev 0x" TARGET_FMT_lx
" registered at 0x"
206 TARGET_FMT_lx
"/0x" TARGET_FMT_lx
"\n",
207 reg
, queue_addr
, queue_len
);
211 static target_ulong
free_crq(VIOsPAPRDevice
*dev
)
217 DPRINTF("CRQ for dev 0x%" PRIx32
" freed\n", dev
->reg
);
222 static target_ulong
h_free_crq(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
223 target_ulong opcode
, target_ulong
*args
)
225 target_ulong reg
= args
[0];
226 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
229 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
233 return free_crq(dev
);
236 static target_ulong
h_send_crq(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
237 target_ulong opcode
, target_ulong
*args
)
239 target_ulong reg
= args
[0];
240 target_ulong msg_hi
= args
[1];
241 target_ulong msg_lo
= args
[2];
242 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
243 uint64_t crq_mangle
[2];
246 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
249 crq_mangle
[0] = cpu_to_be64(msg_hi
);
250 crq_mangle
[1] = cpu_to_be64(msg_lo
);
252 if (dev
->crq
.SendFunc
) {
253 return dev
->crq
.SendFunc(dev
, (uint8_t *)crq_mangle
);
259 static target_ulong
h_enable_crq(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
260 target_ulong opcode
, target_ulong
*args
)
262 target_ulong reg
= args
[0];
263 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
266 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
273 /* Returns negative error, 0 success, or positive: queue full */
274 int spapr_vio_send_crq(VIOsPAPRDevice
*dev
, uint8_t *crq
)
279 if (!dev
->crq
.qsize
) {
280 fprintf(stderr
, "spapr_vio_send_creq on uninitialized queue\n");
284 /* Maybe do a fast path for KVM just writing to the pages */
285 rc
= spapr_vio_dma_read(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, &byte
, 1);
293 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
+ 8,
301 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, crq
, 8);
306 dev
->crq
.qnext
= (dev
->crq
.qnext
+ 16) % dev
->crq
.qsize
;
308 if (dev
->signal_state
& 1) {
309 qemu_irq_pulse(spapr_vio_qirq(dev
));
315 /* "quiesce" handling */
317 static void spapr_vio_quiesce_one(VIOsPAPRDevice
*dev
)
320 device_reset(DEVICE(dev
->tcet
));
325 void spapr_vio_set_bypass(VIOsPAPRDevice
*dev
, bool bypass
)
331 memory_region_set_enabled(&dev
->mrbypass
, bypass
);
332 memory_region_set_enabled(spapr_tce_get_iommu(dev
->tcet
), !bypass
);
334 dev
->tcet
->bypass
= bypass
;
337 static void rtas_set_tce_bypass(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
339 uint32_t nargs
, target_ulong args
,
340 uint32_t nret
, target_ulong rets
)
342 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
344 uint32_t unit
, enable
;
347 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
350 unit
= rtas_ld(args
, 0);
351 enable
= rtas_ld(args
, 1);
352 dev
= spapr_vio_find_by_reg(bus
, unit
);
354 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
359 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
363 spapr_vio_set_bypass(dev
, !!enable
);
365 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
368 static void rtas_quiesce(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
370 uint32_t nargs
, target_ulong args
,
371 uint32_t nret
, target_ulong rets
)
373 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
375 VIOsPAPRDevice
*dev
= NULL
;
378 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
382 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
383 dev
= (VIOsPAPRDevice
*)kid
->child
;
384 spapr_vio_quiesce_one(dev
);
387 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
390 static VIOsPAPRDevice
*reg_conflict(VIOsPAPRDevice
*dev
)
392 VIOsPAPRBus
*bus
= DO_UPCAST(VIOsPAPRBus
, bus
, dev
->qdev
.parent_bus
);
394 VIOsPAPRDevice
*other
;
397 * Check for a device other than the given one which is already
398 * using the requested address. We have to open code this because
399 * the given dev might already be in the list.
401 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
402 other
= VIO_SPAPR_DEVICE(kid
->child
);
404 if (other
!= dev
&& other
->reg
== dev
->reg
) {
412 static void spapr_vio_busdev_reset(DeviceState
*qdev
)
414 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
415 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
417 /* Shut down the request queue and TCEs if necessary */
418 spapr_vio_quiesce_one(dev
);
420 dev
->signal_state
= 0;
422 spapr_vio_set_bypass(dev
, false);
428 static void spapr_vio_busdev_realize(DeviceState
*qdev
, Error
**errp
)
430 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)qdev
;
431 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
434 if (dev
->reg
!= -1) {
436 * Explicitly assigned address, just verify that no-one else
437 * is using it. other mechanism). We have to open code this
438 * rather than using spapr_vio_find_by_reg() because sdev
439 * itself is already in the list.
441 VIOsPAPRDevice
*other
= reg_conflict(dev
);
444 error_setg(errp
, "%s and %s devices conflict at address %#x",
445 object_get_typename(OBJECT(qdev
)),
446 object_get_typename(OBJECT(&other
->qdev
)),
451 /* Need to assign an address */
452 VIOsPAPRBus
*bus
= DO_UPCAST(VIOsPAPRBus
, bus
, dev
->qdev
.parent_bus
);
455 dev
->reg
= bus
->next_reg
++;
456 } while (reg_conflict(dev
));
459 /* Don't overwrite ids assigned on the command line */
461 id
= spapr_vio_get_dev_name(DEVICE(dev
));
465 dev
->irq
= xics_alloc(spapr
->icp
, 0, dev
->irq
, false);
467 error_setg(errp
, "can't allocate IRQ");
471 if (pc
->rtce_window_size
) {
472 uint32_t liobn
= SPAPR_VIO_LIOBN(dev
->reg
);
474 memory_region_init(&dev
->mrroot
, OBJECT(dev
), "iommu-spapr-root",
476 memory_region_init_alias(&dev
->mrbypass
, OBJECT(dev
),
477 "iommu-spapr-bypass", get_system_memory(),
479 memory_region_add_subregion_overlap(&dev
->mrroot
, 0, &dev
->mrbypass
, 1);
480 address_space_init(&dev
->as
, &dev
->mrroot
, qdev
->id
);
482 dev
->tcet
= spapr_tce_new_table(qdev
, liobn
,
484 SPAPR_TCE_PAGE_SHIFT
,
485 pc
->rtce_window_size
>>
486 SPAPR_TCE_PAGE_SHIFT
, false);
487 dev
->tcet
->vdev
= dev
;
488 memory_region_add_subregion_overlap(&dev
->mrroot
, 0,
489 spapr_tce_get_iommu(dev
->tcet
), 2);
492 pc
->realize(dev
, errp
);
495 static target_ulong
h_vio_signal(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
499 target_ulong reg
= args
[0];
500 target_ulong mode
= args
[1];
501 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
502 VIOsPAPRDeviceClass
*pc
;
508 pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
510 if (mode
& ~pc
->signal_mask
) {
514 dev
->signal_state
= mode
;
519 VIOsPAPRBus
*spapr_vio_bus_init(void)
525 /* Create bridge device */
526 dev
= qdev_create(NULL
, "spapr-vio-bridge");
527 qdev_init_nofail(dev
);
529 /* Create bus on bridge device */
531 qbus
= qbus_create(TYPE_SPAPR_VIO_BUS
, dev
, "spapr-vio");
532 bus
= DO_UPCAST(VIOsPAPRBus
, bus
, qbus
);
533 bus
->next_reg
= 0x71000000;
536 spapr_register_hypercall(H_VIO_SIGNAL
, h_vio_signal
);
539 spapr_register_hypercall(H_REG_CRQ
, h_reg_crq
);
540 spapr_register_hypercall(H_FREE_CRQ
, h_free_crq
);
541 spapr_register_hypercall(H_SEND_CRQ
, h_send_crq
);
542 spapr_register_hypercall(H_ENABLE_CRQ
, h_enable_crq
);
545 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS
, "ibm,set-tce-bypass",
546 rtas_set_tce_bypass
);
547 spapr_rtas_register(RTAS_QUIESCE
, "quiesce", rtas_quiesce
);
552 /* Represents sPAPR hcall VIO devices */
554 static int spapr_vio_bridge_init(SysBusDevice
*dev
)
560 static void spapr_vio_bridge_class_init(ObjectClass
*klass
, void *data
)
562 SysBusDeviceClass
*k
= SYS_BUS_DEVICE_CLASS(klass
);
563 DeviceClass
*dc
= DEVICE_CLASS(klass
);
565 dc
->fw_name
= "vdevice";
566 k
->init
= spapr_vio_bridge_init
;
569 static const TypeInfo spapr_vio_bridge_info
= {
570 .name
= "spapr-vio-bridge",
571 .parent
= TYPE_SYS_BUS_DEVICE
,
572 .instance_size
= sizeof(SysBusDevice
),
573 .class_init
= spapr_vio_bridge_class_init
,
576 const VMStateDescription vmstate_spapr_vio
= {
579 .minimum_version_id
= 1,
580 .fields
= (VMStateField
[]) {
582 VMSTATE_UINT32_EQUAL(reg
, VIOsPAPRDevice
),
583 VMSTATE_UINT32_EQUAL(irq
, VIOsPAPRDevice
),
585 /* General VIO device state */
586 VMSTATE_UINTTL(signal_state
, VIOsPAPRDevice
),
587 VMSTATE_UINT64(crq
.qladdr
, VIOsPAPRDevice
),
588 VMSTATE_UINT32(crq
.qsize
, VIOsPAPRDevice
),
589 VMSTATE_UINT32(crq
.qnext
, VIOsPAPRDevice
),
591 VMSTATE_END_OF_LIST()
595 static void vio_spapr_device_class_init(ObjectClass
*klass
, void *data
)
597 DeviceClass
*k
= DEVICE_CLASS(klass
);
598 k
->realize
= spapr_vio_busdev_realize
;
599 k
->reset
= spapr_vio_busdev_reset
;
600 k
->bus_type
= TYPE_SPAPR_VIO_BUS
;
601 k
->props
= spapr_vio_props
;
604 static const TypeInfo spapr_vio_type_info
= {
605 .name
= TYPE_VIO_SPAPR_DEVICE
,
606 .parent
= TYPE_DEVICE
,
607 .instance_size
= sizeof(VIOsPAPRDevice
),
609 .class_size
= sizeof(VIOsPAPRDeviceClass
),
610 .class_init
= vio_spapr_device_class_init
,
613 static void spapr_vio_register_types(void)
615 type_register_static(&spapr_vio_bus_info
);
616 type_register_static(&spapr_vio_bridge_info
);
617 type_register_static(&spapr_vio_type_info
);
620 type_init(spapr_vio_register_types
)
622 static int compare_reg(const void *p1
, const void *p2
)
624 VIOsPAPRDevice
const *dev1
, *dev2
;
626 dev1
= (VIOsPAPRDevice
*)*(DeviceState
**)p1
;
627 dev2
= (VIOsPAPRDevice
*)*(DeviceState
**)p2
;
629 if (dev1
->reg
< dev2
->reg
) {
632 if (dev1
->reg
== dev2
->reg
) {
636 /* dev1->reg > dev2->reg */
640 int spapr_populate_vdevice(VIOsPAPRBus
*bus
, void *fdt
)
642 DeviceState
*qdev
, **qdevs
;
646 /* Count qdevs on the bus list */
648 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
652 /* Copy out into an array of pointers */
653 qdevs
= g_malloc(sizeof(qdev
) * num
);
655 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
656 qdevs
[num
++] = kid
->child
;
660 qsort(qdevs
, num
, sizeof(qdev
), compare_reg
);
662 /* Hack alert. Give the devices to libfdt in reverse order, we happen
663 * to know that will mean they are in forward order in the tree. */
664 for (i
= num
- 1; i
>= 0; i
--) {
665 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)(qdevs
[i
]);
667 ret
= vio_make_devnode(dev
, fdt
);
681 int spapr_populate_chosen_stdout(void *fdt
, VIOsPAPRBus
*bus
)
687 dev
= spapr_vty_get_default(bus
);
691 offset
= fdt_path_offset(fdt
, "/chosen");
696 name
= spapr_vio_get_dev_name(DEVICE(dev
));
697 path
= g_strdup_printf("/vdevice/%s", name
);
699 ret
= fdt_setprop_string(fdt
, offset
, "linux,stdout-path", path
);