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 "qapi/error.h"
26 #include "sysemu/sysemu.h"
27 #include "hw/boards.h"
28 #include "hw/loader.h"
30 #include "hw/sysbus.h"
31 #include "sysemu/kvm.h"
32 #include "sysemu/device_tree.h"
35 #include "hw/ppc/spapr.h"
36 #include "hw/ppc/spapr_vio.h"
37 #include "hw/ppc/xics.h"
41 /* #define DEBUG_SPAPR */
44 #define DPRINTF(fmt, ...) \
45 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
47 #define DPRINTF(fmt, ...) \
51 static Property spapr_vio_props
[] = {
52 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice
, irq
, 0), \
53 DEFINE_PROP_END_OF_LIST(),
56 static char *spapr_vio_get_dev_name(DeviceState
*qdev
)
58 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
59 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
62 /* Device tree style name device@reg */
63 name
= g_strdup_printf("%s@%x", pc
->dt_name
, dev
->reg
);
68 static void spapr_vio_bus_class_init(ObjectClass
*klass
, void *data
)
70 BusClass
*k
= BUS_CLASS(klass
);
72 k
->get_dev_path
= spapr_vio_get_dev_name
;
73 k
->get_fw_dev_path
= spapr_vio_get_dev_name
;
76 static const TypeInfo spapr_vio_bus_info
= {
77 .name
= TYPE_SPAPR_VIO_BUS
,
79 .class_init
= spapr_vio_bus_class_init
,
80 .instance_size
= sizeof(VIOsPAPRBus
),
83 VIOsPAPRDevice
*spapr_vio_find_by_reg(VIOsPAPRBus
*bus
, uint32_t reg
)
86 VIOsPAPRDevice
*dev
= NULL
;
88 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
89 dev
= (VIOsPAPRDevice
*)kid
->child
;
90 if (dev
->reg
== reg
) {
98 static int vio_make_devnode(VIOsPAPRDevice
*dev
,
101 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
102 int vdevice_off
, node_off
, ret
;
105 vdevice_off
= fdt_path_offset(fdt
, "/vdevice");
106 if (vdevice_off
< 0) {
110 dt_name
= spapr_vio_get_dev_name(DEVICE(dev
));
111 node_off
= fdt_add_subnode(fdt
, vdevice_off
, dt_name
);
117 ret
= fdt_setprop_cell(fdt
, node_off
, "reg", dev
->reg
);
123 ret
= fdt_setprop_string(fdt
, node_off
, "device_type",
130 if (pc
->dt_compatible
) {
131 ret
= fdt_setprop_string(fdt
, node_off
, "compatible",
139 uint32_t ints_prop
[] = {cpu_to_be32(dev
->irq
), 0};
141 ret
= fdt_setprop(fdt
, node_off
, "interrupts", ints_prop
,
148 ret
= spapr_tcet_dma_dt(fdt
, node_off
, "ibm,my-dma-window", dev
->tcet
);
154 ret
= (pc
->devnode
)(dev
, fdt
, node_off
);
166 static target_ulong
h_reg_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
167 target_ulong opcode
, target_ulong
*args
)
169 target_ulong reg
= args
[0];
170 target_ulong queue_addr
= args
[1];
171 target_ulong queue_len
= args
[2];
172 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
175 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
179 /* We can't grok a queue size bigger than 256M for now */
180 if (queue_len
< 0x1000 || queue_len
> 0x10000000) {
181 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
186 /* Check queue alignment */
187 if (queue_addr
& 0xfff) {
188 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx
")\n", queue_addr
);
192 /* Check if device supports CRQs */
193 if (!dev
->crq
.SendFunc
) {
194 hcall_dprintf("Device does not support CRQ\n");
198 /* Already a queue ? */
199 if (dev
->crq
.qsize
) {
200 hcall_dprintf("CRQ already registered\n");
203 dev
->crq
.qladdr
= queue_addr
;
204 dev
->crq
.qsize
= queue_len
;
207 DPRINTF("CRQ for dev 0x" TARGET_FMT_lx
" registered at 0x"
208 TARGET_FMT_lx
"/0x" TARGET_FMT_lx
"\n",
209 reg
, queue_addr
, queue_len
);
213 static target_ulong
free_crq(VIOsPAPRDevice
*dev
)
219 DPRINTF("CRQ for dev 0x%" PRIx32
" freed\n", dev
->reg
);
224 static target_ulong
h_free_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
225 target_ulong opcode
, target_ulong
*args
)
227 target_ulong reg
= args
[0];
228 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
231 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
235 return free_crq(dev
);
238 static target_ulong
h_send_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
239 target_ulong opcode
, target_ulong
*args
)
241 target_ulong reg
= args
[0];
242 target_ulong msg_hi
= args
[1];
243 target_ulong msg_lo
= args
[2];
244 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
245 uint64_t crq_mangle
[2];
248 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
251 crq_mangle
[0] = cpu_to_be64(msg_hi
);
252 crq_mangle
[1] = cpu_to_be64(msg_lo
);
254 if (dev
->crq
.SendFunc
) {
255 return dev
->crq
.SendFunc(dev
, (uint8_t *)crq_mangle
);
261 static target_ulong
h_enable_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
262 target_ulong opcode
, target_ulong
*args
)
264 target_ulong reg
= args
[0];
265 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
268 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
275 /* Returns negative error, 0 success, or positive: queue full */
276 int spapr_vio_send_crq(VIOsPAPRDevice
*dev
, uint8_t *crq
)
281 if (!dev
->crq
.qsize
) {
282 fprintf(stderr
, "spapr_vio_send_creq on uninitialized queue\n");
286 /* Maybe do a fast path for KVM just writing to the pages */
287 rc
= spapr_vio_dma_read(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, &byte
, 1);
295 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
+ 8,
303 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, crq
, 8);
308 dev
->crq
.qnext
= (dev
->crq
.qnext
+ 16) % dev
->crq
.qsize
;
310 if (dev
->signal_state
& 1) {
311 qemu_irq_pulse(spapr_vio_qirq(dev
));
317 /* "quiesce" handling */
319 static void spapr_vio_quiesce_one(VIOsPAPRDevice
*dev
)
322 device_reset(DEVICE(dev
->tcet
));
327 void spapr_vio_set_bypass(VIOsPAPRDevice
*dev
, bool bypass
)
333 memory_region_set_enabled(&dev
->mrbypass
, bypass
);
334 memory_region_set_enabled(spapr_tce_get_iommu(dev
->tcet
), !bypass
);
336 dev
->tcet
->bypass
= bypass
;
339 static void rtas_set_tce_bypass(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
341 uint32_t nargs
, target_ulong args
,
342 uint32_t nret
, target_ulong rets
)
344 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
346 uint32_t unit
, enable
;
349 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
352 unit
= rtas_ld(args
, 0);
353 enable
= rtas_ld(args
, 1);
354 dev
= spapr_vio_find_by_reg(bus
, unit
);
356 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
361 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
365 spapr_vio_set_bypass(dev
, !!enable
);
367 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
370 static void rtas_quiesce(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
372 uint32_t nargs
, target_ulong args
,
373 uint32_t nret
, target_ulong rets
)
375 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
377 VIOsPAPRDevice
*dev
= NULL
;
380 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
384 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
385 dev
= (VIOsPAPRDevice
*)kid
->child
;
386 spapr_vio_quiesce_one(dev
);
389 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
392 static VIOsPAPRDevice
*reg_conflict(VIOsPAPRDevice
*dev
)
394 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
396 VIOsPAPRDevice
*other
;
399 * Check for a device other than the given one which is already
400 * using the requested address. We have to open code this because
401 * the given dev might already be in the list.
403 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
404 other
= VIO_SPAPR_DEVICE(kid
->child
);
406 if (other
!= dev
&& other
->reg
== dev
->reg
) {
414 static void spapr_vio_busdev_reset(DeviceState
*qdev
)
416 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
417 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
419 /* Shut down the request queue and TCEs if necessary */
420 spapr_vio_quiesce_one(dev
);
422 dev
->signal_state
= 0;
424 spapr_vio_set_bypass(dev
, false);
430 static void spapr_vio_busdev_realize(DeviceState
*qdev
, Error
**errp
)
432 sPAPRMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
433 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)qdev
;
434 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
436 Error
*local_err
= NULL
;
438 if (dev
->reg
!= -1) {
440 * Explicitly assigned address, just verify that no-one else
441 * is using it. other mechanism). We have to open code this
442 * rather than using spapr_vio_find_by_reg() because sdev
443 * itself is already in the list.
445 VIOsPAPRDevice
*other
= reg_conflict(dev
);
448 error_setg(errp
, "%s and %s devices conflict at address %#x",
449 object_get_typename(OBJECT(qdev
)),
450 object_get_typename(OBJECT(&other
->qdev
)),
455 /* Need to assign an address */
456 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
459 dev
->reg
= bus
->next_reg
++;
460 } while (reg_conflict(dev
));
463 /* Don't overwrite ids assigned on the command line */
465 id
= spapr_vio_get_dev_name(DEVICE(dev
));
469 dev
->irq
= xics_alloc(spapr
->icp
, 0, dev
->irq
, false, &local_err
);
471 error_propagate(errp
, local_err
);
475 if (pc
->rtce_window_size
) {
476 uint32_t liobn
= SPAPR_VIO_LIOBN(dev
->reg
);
478 memory_region_init(&dev
->mrroot
, OBJECT(dev
), "iommu-spapr-root",
480 memory_region_init_alias(&dev
->mrbypass
, OBJECT(dev
),
481 "iommu-spapr-bypass", get_system_memory(),
483 memory_region_add_subregion_overlap(&dev
->mrroot
, 0, &dev
->mrbypass
, 1);
484 address_space_init(&dev
->as
, &dev
->mrroot
, qdev
->id
);
486 dev
->tcet
= spapr_tce_new_table(qdev
, liobn
,
488 SPAPR_TCE_PAGE_SHIFT
,
489 pc
->rtce_window_size
>>
490 SPAPR_TCE_PAGE_SHIFT
, false);
491 dev
->tcet
->vdev
= dev
;
492 memory_region_add_subregion_overlap(&dev
->mrroot
, 0,
493 spapr_tce_get_iommu(dev
->tcet
), 2);
496 pc
->realize(dev
, errp
);
499 static target_ulong
h_vio_signal(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
503 target_ulong reg
= args
[0];
504 target_ulong mode
= args
[1];
505 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
506 VIOsPAPRDeviceClass
*pc
;
512 pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
514 if (mode
& ~pc
->signal_mask
) {
518 dev
->signal_state
= mode
;
523 VIOsPAPRBus
*spapr_vio_bus_init(void)
529 /* Create bridge device */
530 dev
= qdev_create(NULL
, TYPE_SPAPR_VIO_BRIDGE
);
531 qdev_init_nofail(dev
);
533 /* Create bus on bridge device */
534 qbus
= qbus_create(TYPE_SPAPR_VIO_BUS
, dev
, "spapr-vio");
535 bus
= SPAPR_VIO_BUS(qbus
);
536 bus
->next_reg
= 0x71000000;
539 spapr_register_hypercall(H_VIO_SIGNAL
, h_vio_signal
);
542 spapr_register_hypercall(H_REG_CRQ
, h_reg_crq
);
543 spapr_register_hypercall(H_FREE_CRQ
, h_free_crq
);
544 spapr_register_hypercall(H_SEND_CRQ
, h_send_crq
);
545 spapr_register_hypercall(H_ENABLE_CRQ
, h_enable_crq
);
548 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS
, "ibm,set-tce-bypass",
549 rtas_set_tce_bypass
);
550 spapr_rtas_register(RTAS_QUIESCE
, "quiesce", rtas_quiesce
);
555 /* Represents sPAPR hcall VIO devices */
557 static int spapr_vio_bridge_init(SysBusDevice
*dev
)
563 static void spapr_vio_bridge_class_init(ObjectClass
*klass
, void *data
)
565 SysBusDeviceClass
*k
= SYS_BUS_DEVICE_CLASS(klass
);
566 DeviceClass
*dc
= DEVICE_CLASS(klass
);
568 dc
->fw_name
= "vdevice";
569 k
->init
= spapr_vio_bridge_init
;
572 static const TypeInfo spapr_vio_bridge_info
= {
573 .name
= TYPE_SPAPR_VIO_BRIDGE
,
574 .parent
= TYPE_SYS_BUS_DEVICE
,
575 .class_init
= spapr_vio_bridge_class_init
,
578 const VMStateDescription vmstate_spapr_vio
= {
581 .minimum_version_id
= 1,
582 .fields
= (VMStateField
[]) {
584 VMSTATE_UINT32_EQUAL(reg
, VIOsPAPRDevice
),
585 VMSTATE_UINT32_EQUAL(irq
, VIOsPAPRDevice
),
587 /* General VIO device state */
588 VMSTATE_UINT64(signal_state
, VIOsPAPRDevice
),
589 VMSTATE_UINT64(crq
.qladdr
, VIOsPAPRDevice
),
590 VMSTATE_UINT32(crq
.qsize
, VIOsPAPRDevice
),
591 VMSTATE_UINT32(crq
.qnext
, VIOsPAPRDevice
),
593 VMSTATE_END_OF_LIST()
597 static void vio_spapr_device_class_init(ObjectClass
*klass
, void *data
)
599 DeviceClass
*k
= DEVICE_CLASS(klass
);
600 k
->realize
= spapr_vio_busdev_realize
;
601 k
->reset
= spapr_vio_busdev_reset
;
602 k
->bus_type
= TYPE_SPAPR_VIO_BUS
;
603 k
->props
= spapr_vio_props
;
606 static const TypeInfo spapr_vio_type_info
= {
607 .name
= TYPE_VIO_SPAPR_DEVICE
,
608 .parent
= TYPE_DEVICE
,
609 .instance_size
= sizeof(VIOsPAPRDevice
),
611 .class_size
= sizeof(VIOsPAPRDeviceClass
),
612 .class_init
= vio_spapr_device_class_init
,
615 static void spapr_vio_register_types(void)
617 type_register_static(&spapr_vio_bus_info
);
618 type_register_static(&spapr_vio_bridge_info
);
619 type_register_static(&spapr_vio_type_info
);
622 type_init(spapr_vio_register_types
)
624 static int compare_reg(const void *p1
, const void *p2
)
626 VIOsPAPRDevice
const *dev1
, *dev2
;
628 dev1
= (VIOsPAPRDevice
*)*(DeviceState
**)p1
;
629 dev2
= (VIOsPAPRDevice
*)*(DeviceState
**)p2
;
631 if (dev1
->reg
< dev2
->reg
) {
634 if (dev1
->reg
== dev2
->reg
) {
638 /* dev1->reg > dev2->reg */
642 int spapr_populate_vdevice(VIOsPAPRBus
*bus
, void *fdt
)
644 DeviceState
*qdev
, **qdevs
;
648 /* Count qdevs on the bus list */
650 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
654 /* Copy out into an array of pointers */
655 qdevs
= g_malloc(sizeof(qdev
) * num
);
657 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
658 qdevs
[num
++] = kid
->child
;
662 qsort(qdevs
, num
, sizeof(qdev
), compare_reg
);
664 /* Hack alert. Give the devices to libfdt in reverse order, we happen
665 * to know that will mean they are in forward order in the tree. */
666 for (i
= num
- 1; i
>= 0; i
--) {
667 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)(qdevs
[i
]);
669 ret
= vio_make_devnode(dev
, fdt
);
683 int spapr_populate_chosen_stdout(void *fdt
, VIOsPAPRBus
*bus
)
689 dev
= spapr_vty_get_default(bus
);
693 offset
= fdt_path_offset(fdt
, "/chosen");
698 name
= spapr_vio_get_dev_name(DEVICE(dev
));
699 path
= g_strdup_printf("/vdevice/%s", name
);
701 ret
= fdt_setprop_string(fdt
, offset
, "linux,stdout-path", path
);