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"
27 #include "sysemu/sysemu.h"
28 #include "hw/boards.h"
29 #include "hw/loader.h"
31 #include "hw/sysbus.h"
32 #include "sysemu/kvm.h"
33 #include "sysemu/device_tree.h"
36 #include "hw/ppc/spapr.h"
37 #include "hw/ppc/spapr_vio.h"
38 #include "hw/ppc/xics.h"
39 #include "hw/ppc/fdt.h"
44 static Property spapr_vio_props
[] = {
45 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice
, irq
, 0), \
46 DEFINE_PROP_END_OF_LIST(),
49 static char *spapr_vio_get_dev_name(DeviceState
*qdev
)
51 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
52 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
54 /* Device tree style name device@reg */
55 return g_strdup_printf("%s@%x", pc
->dt_name
, dev
->reg
);
58 static void spapr_vio_bus_class_init(ObjectClass
*klass
, void *data
)
60 BusClass
*k
= BUS_CLASS(klass
);
62 k
->get_dev_path
= spapr_vio_get_dev_name
;
63 k
->get_fw_dev_path
= spapr_vio_get_dev_name
;
66 static const TypeInfo spapr_vio_bus_info
= {
67 .name
= TYPE_SPAPR_VIO_BUS
,
69 .class_init
= spapr_vio_bus_class_init
,
70 .instance_size
= sizeof(VIOsPAPRBus
),
73 VIOsPAPRDevice
*spapr_vio_find_by_reg(VIOsPAPRBus
*bus
, uint32_t reg
)
76 VIOsPAPRDevice
*dev
= NULL
;
78 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
79 dev
= (VIOsPAPRDevice
*)kid
->child
;
80 if (dev
->reg
== reg
) {
88 static int vio_make_devnode(VIOsPAPRDevice
*dev
,
91 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
92 int vdevice_off
, node_off
, ret
;
95 vdevice_off
= fdt_path_offset(fdt
, "/vdevice");
96 if (vdevice_off
< 0) {
100 dt_name
= spapr_vio_get_dev_name(DEVICE(dev
));
101 node_off
= fdt_add_subnode(fdt
, vdevice_off
, dt_name
);
107 ret
= fdt_setprop_cell(fdt
, node_off
, "reg", dev
->reg
);
113 ret
= fdt_setprop_string(fdt
, node_off
, "device_type",
120 if (pc
->dt_compatible
) {
121 ret
= fdt_setprop_string(fdt
, node_off
, "compatible",
129 uint32_t ints_prop
[2];
131 spapr_dt_xics_irq(ints_prop
, dev
->irq
, false);
132 ret
= fdt_setprop(fdt
, node_off
, "interrupts", ints_prop
,
139 ret
= spapr_tcet_dma_dt(fdt
, node_off
, "ibm,my-dma-window", dev
->tcet
);
145 ret
= (pc
->devnode
)(dev
, fdt
, node_off
);
157 static target_ulong
h_reg_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
158 target_ulong opcode
, target_ulong
*args
)
160 target_ulong reg
= args
[0];
161 target_ulong queue_addr
= args
[1];
162 target_ulong queue_len
= args
[2];
163 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
166 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
170 /* We can't grok a queue size bigger than 256M for now */
171 if (queue_len
< 0x1000 || queue_len
> 0x10000000) {
172 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
177 /* Check queue alignment */
178 if (queue_addr
& 0xfff) {
179 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx
")\n", queue_addr
);
183 /* Check if device supports CRQs */
184 if (!dev
->crq
.SendFunc
) {
185 hcall_dprintf("Device does not support CRQ\n");
189 /* Already a queue ? */
190 if (dev
->crq
.qsize
) {
191 hcall_dprintf("CRQ already registered\n");
194 dev
->crq
.qladdr
= queue_addr
;
195 dev
->crq
.qsize
= queue_len
;
198 trace_spapr_vio_h_reg_crq(reg
, queue_addr
, queue_len
);
202 static target_ulong
free_crq(VIOsPAPRDevice
*dev
)
208 trace_spapr_vio_free_crq(dev
->reg
);
213 static target_ulong
h_free_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
214 target_ulong opcode
, target_ulong
*args
)
216 target_ulong reg
= args
[0];
217 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
220 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
224 return free_crq(dev
);
227 static target_ulong
h_send_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
228 target_ulong opcode
, target_ulong
*args
)
230 target_ulong reg
= args
[0];
231 target_ulong msg_hi
= args
[1];
232 target_ulong msg_lo
= args
[2];
233 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
234 uint64_t crq_mangle
[2];
237 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
240 crq_mangle
[0] = cpu_to_be64(msg_hi
);
241 crq_mangle
[1] = cpu_to_be64(msg_lo
);
243 if (dev
->crq
.SendFunc
) {
244 return dev
->crq
.SendFunc(dev
, (uint8_t *)crq_mangle
);
250 static target_ulong
h_enable_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
251 target_ulong opcode
, target_ulong
*args
)
253 target_ulong reg
= args
[0];
254 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
257 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
264 /* Returns negative error, 0 success, or positive: queue full */
265 int spapr_vio_send_crq(VIOsPAPRDevice
*dev
, uint8_t *crq
)
270 if (!dev
->crq
.qsize
) {
271 error_report("spapr_vio_send_creq on uninitialized queue");
275 /* Maybe do a fast path for KVM just writing to the pages */
276 rc
= spapr_vio_dma_read(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, &byte
, 1);
284 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
+ 8,
292 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, crq
, 8);
297 dev
->crq
.qnext
= (dev
->crq
.qnext
+ 16) % dev
->crq
.qsize
;
299 if (dev
->signal_state
& 1) {
300 qemu_irq_pulse(spapr_vio_qirq(dev
));
306 /* "quiesce" handling */
308 static void spapr_vio_quiesce_one(VIOsPAPRDevice
*dev
)
311 device_reset(DEVICE(dev
->tcet
));
316 void spapr_vio_set_bypass(VIOsPAPRDevice
*dev
, bool bypass
)
322 memory_region_set_enabled(&dev
->mrbypass
, bypass
);
323 memory_region_set_enabled(spapr_tce_get_iommu(dev
->tcet
), !bypass
);
325 dev
->tcet
->bypass
= bypass
;
328 static void rtas_set_tce_bypass(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
330 uint32_t nargs
, target_ulong args
,
331 uint32_t nret
, target_ulong rets
)
333 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
335 uint32_t unit
, enable
;
338 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
341 unit
= rtas_ld(args
, 0);
342 enable
= rtas_ld(args
, 1);
343 dev
= spapr_vio_find_by_reg(bus
, unit
);
345 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
350 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
354 spapr_vio_set_bypass(dev
, !!enable
);
356 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
359 static void rtas_quiesce(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
361 uint32_t nargs
, target_ulong args
,
362 uint32_t nret
, target_ulong rets
)
364 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
366 VIOsPAPRDevice
*dev
= NULL
;
369 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
373 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
374 dev
= (VIOsPAPRDevice
*)kid
->child
;
375 spapr_vio_quiesce_one(dev
);
378 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
381 static VIOsPAPRDevice
*reg_conflict(VIOsPAPRDevice
*dev
)
383 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
385 VIOsPAPRDevice
*other
;
388 * Check for a device other than the given one which is already
389 * using the requested address. We have to open code this because
390 * the given dev might already be in the list.
392 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
393 other
= VIO_SPAPR_DEVICE(kid
->child
);
395 if (other
!= dev
&& other
->reg
== dev
->reg
) {
403 static void spapr_vio_busdev_reset(DeviceState
*qdev
)
405 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
406 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
408 /* Shut down the request queue and TCEs if necessary */
409 spapr_vio_quiesce_one(dev
);
411 dev
->signal_state
= 0;
413 spapr_vio_set_bypass(dev
, false);
419 static void spapr_vio_busdev_realize(DeviceState
*qdev
, Error
**errp
)
421 sPAPRMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
422 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)qdev
;
423 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
425 Error
*local_err
= NULL
;
427 if (dev
->reg
!= -1) {
429 * Explicitly assigned address, just verify that no-one else
430 * is using it. other mechanism). We have to open code this
431 * rather than using spapr_vio_find_by_reg() because sdev
432 * itself is already in the list.
434 VIOsPAPRDevice
*other
= reg_conflict(dev
);
437 error_setg(errp
, "%s and %s devices conflict at address %#x",
438 object_get_typename(OBJECT(qdev
)),
439 object_get_typename(OBJECT(&other
->qdev
)),
444 /* Need to assign an address */
445 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
448 dev
->reg
= bus
->next_reg
++;
449 } while (reg_conflict(dev
));
452 /* Don't overwrite ids assigned on the command line */
454 id
= spapr_vio_get_dev_name(DEVICE(dev
));
458 dev
->irq
= spapr_irq_alloc(spapr
, dev
->irq
, false, &local_err
);
460 error_propagate(errp
, local_err
);
464 if (pc
->rtce_window_size
) {
465 uint32_t liobn
= SPAPR_VIO_LIOBN(dev
->reg
);
467 memory_region_init(&dev
->mrroot
, OBJECT(dev
), "iommu-spapr-root",
469 memory_region_init_alias(&dev
->mrbypass
, OBJECT(dev
),
470 "iommu-spapr-bypass", get_system_memory(),
472 memory_region_add_subregion_overlap(&dev
->mrroot
, 0, &dev
->mrbypass
, 1);
473 address_space_init(&dev
->as
, &dev
->mrroot
, qdev
->id
);
475 dev
->tcet
= spapr_tce_new_table(qdev
, liobn
);
476 spapr_tce_table_enable(dev
->tcet
, SPAPR_TCE_PAGE_SHIFT
, 0,
477 pc
->rtce_window_size
>> SPAPR_TCE_PAGE_SHIFT
);
478 dev
->tcet
->vdev
= dev
;
479 memory_region_add_subregion_overlap(&dev
->mrroot
, 0,
480 spapr_tce_get_iommu(dev
->tcet
), 2);
483 pc
->realize(dev
, errp
);
486 static target_ulong
h_vio_signal(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
490 target_ulong reg
= args
[0];
491 target_ulong mode
= args
[1];
492 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
493 VIOsPAPRDeviceClass
*pc
;
499 pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
501 if (mode
& ~pc
->signal_mask
) {
505 dev
->signal_state
= mode
;
510 VIOsPAPRBus
*spapr_vio_bus_init(void)
516 /* Create bridge device */
517 dev
= qdev_create(NULL
, TYPE_SPAPR_VIO_BRIDGE
);
518 qdev_init_nofail(dev
);
520 /* Create bus on bridge device */
521 qbus
= qbus_create(TYPE_SPAPR_VIO_BUS
, dev
, "spapr-vio");
522 bus
= SPAPR_VIO_BUS(qbus
);
523 bus
->next_reg
= 0x71000000;
526 spapr_register_hypercall(H_VIO_SIGNAL
, h_vio_signal
);
529 spapr_register_hypercall(H_REG_CRQ
, h_reg_crq
);
530 spapr_register_hypercall(H_FREE_CRQ
, h_free_crq
);
531 spapr_register_hypercall(H_SEND_CRQ
, h_send_crq
);
532 spapr_register_hypercall(H_ENABLE_CRQ
, h_enable_crq
);
535 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS
, "ibm,set-tce-bypass",
536 rtas_set_tce_bypass
);
537 spapr_rtas_register(RTAS_QUIESCE
, "quiesce", rtas_quiesce
);
542 static void spapr_vio_bridge_class_init(ObjectClass
*klass
, void *data
)
544 DeviceClass
*dc
= DEVICE_CLASS(klass
);
546 dc
->fw_name
= "vdevice";
549 static const TypeInfo spapr_vio_bridge_info
= {
550 .name
= TYPE_SPAPR_VIO_BRIDGE
,
551 .parent
= TYPE_SYS_BUS_DEVICE
,
552 .class_init
= spapr_vio_bridge_class_init
,
555 const VMStateDescription vmstate_spapr_vio
= {
558 .minimum_version_id
= 1,
559 .fields
= (VMStateField
[]) {
561 VMSTATE_UINT32_EQUAL(reg
, VIOsPAPRDevice
, NULL
),
562 VMSTATE_UINT32_EQUAL(irq
, VIOsPAPRDevice
, NULL
),
564 /* General VIO device state */
565 VMSTATE_UINT64(signal_state
, VIOsPAPRDevice
),
566 VMSTATE_UINT64(crq
.qladdr
, VIOsPAPRDevice
),
567 VMSTATE_UINT32(crq
.qsize
, VIOsPAPRDevice
),
568 VMSTATE_UINT32(crq
.qnext
, VIOsPAPRDevice
),
570 VMSTATE_END_OF_LIST()
574 static void vio_spapr_device_class_init(ObjectClass
*klass
, void *data
)
576 DeviceClass
*k
= DEVICE_CLASS(klass
);
577 k
->realize
= spapr_vio_busdev_realize
;
578 k
->reset
= spapr_vio_busdev_reset
;
579 k
->bus_type
= TYPE_SPAPR_VIO_BUS
;
580 k
->props
= spapr_vio_props
;
583 static const TypeInfo spapr_vio_type_info
= {
584 .name
= TYPE_VIO_SPAPR_DEVICE
,
585 .parent
= TYPE_DEVICE
,
586 .instance_size
= sizeof(VIOsPAPRDevice
),
588 .class_size
= sizeof(VIOsPAPRDeviceClass
),
589 .class_init
= vio_spapr_device_class_init
,
592 static void spapr_vio_register_types(void)
594 type_register_static(&spapr_vio_bus_info
);
595 type_register_static(&spapr_vio_bridge_info
);
596 type_register_static(&spapr_vio_type_info
);
599 type_init(spapr_vio_register_types
)
601 static int compare_reg(const void *p1
, const void *p2
)
603 VIOsPAPRDevice
const *dev1
, *dev2
;
605 dev1
= (VIOsPAPRDevice
*)*(DeviceState
**)p1
;
606 dev2
= (VIOsPAPRDevice
*)*(DeviceState
**)p2
;
608 if (dev1
->reg
< dev2
->reg
) {
611 if (dev1
->reg
== dev2
->reg
) {
615 /* dev1->reg > dev2->reg */
619 void spapr_dt_vdevice(VIOsPAPRBus
*bus
, void *fdt
)
621 DeviceState
*qdev
, **qdevs
;
626 _FDT(node
= fdt_add_subnode(fdt
, 0, "vdevice"));
628 _FDT(fdt_setprop_string(fdt
, node
, "device_type", "vdevice"));
629 _FDT(fdt_setprop_string(fdt
, node
, "compatible", "IBM,vdevice"));
630 _FDT(fdt_setprop_cell(fdt
, node
, "#address-cells", 1));
631 _FDT(fdt_setprop_cell(fdt
, node
, "#size-cells", 0));
632 _FDT(fdt_setprop_cell(fdt
, node
, "#interrupt-cells", 2));
633 _FDT(fdt_setprop(fdt
, node
, "interrupt-controller", NULL
, 0));
635 /* Count qdevs on the bus list */
637 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
641 /* Copy out into an array of pointers */
642 qdevs
= g_malloc(sizeof(qdev
) * num
);
644 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
645 qdevs
[num
++] = kid
->child
;
649 qsort(qdevs
, num
, sizeof(qdev
), compare_reg
);
651 /* Hack alert. Give the devices to libfdt in reverse order, we happen
652 * to know that will mean they are in forward order in the tree. */
653 for (i
= num
- 1; i
>= 0; i
--) {
654 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)(qdevs
[i
]);
655 VIOsPAPRDeviceClass
*vdc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
657 ret
= vio_make_devnode(dev
, fdt
);
659 error_report("Couldn't create device node /vdevice/%s@%"PRIx32
,
660 vdc
->dt_name
, dev
->reg
);
668 gchar
*spapr_vio_stdout_path(VIOsPAPRBus
*bus
)
673 dev
= spapr_vty_get_default(bus
);
678 name
= spapr_vio_get_dev_name(DEVICE(dev
));
679 path
= g_strdup_printf("/vdevice/%s", name
);