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"
25 #include "sysemu/sysemu.h"
26 #include "hw/boards.h"
27 #include "hw/loader.h"
29 #include "hw/sysbus.h"
30 #include "sysemu/kvm.h"
31 #include "sysemu/device_tree.h"
34 #include "hw/ppc/spapr.h"
35 #include "hw/ppc/spapr_vio.h"
36 #include "hw/ppc/xics.h"
40 /* #define DEBUG_SPAPR */
43 #define DPRINTF(fmt, ...) \
44 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
46 #define DPRINTF(fmt, ...) \
50 static Property spapr_vio_props
[] = {
51 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice
, irq
, 0), \
52 DEFINE_PROP_END_OF_LIST(),
55 static char *spapr_vio_get_dev_name(DeviceState
*qdev
)
57 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
58 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
61 /* Device tree style name device@reg */
62 name
= g_strdup_printf("%s@%x", pc
->dt_name
, dev
->reg
);
67 static void spapr_vio_bus_class_init(ObjectClass
*klass
, void *data
)
69 BusClass
*k
= BUS_CLASS(klass
);
71 k
->get_dev_path
= spapr_vio_get_dev_name
;
72 k
->get_fw_dev_path
= spapr_vio_get_dev_name
;
75 static const TypeInfo spapr_vio_bus_info
= {
76 .name
= TYPE_SPAPR_VIO_BUS
,
78 .class_init
= spapr_vio_bus_class_init
,
79 .instance_size
= sizeof(VIOsPAPRBus
),
82 VIOsPAPRDevice
*spapr_vio_find_by_reg(VIOsPAPRBus
*bus
, uint32_t reg
)
85 VIOsPAPRDevice
*dev
= NULL
;
87 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
88 dev
= (VIOsPAPRDevice
*)kid
->child
;
89 if (dev
->reg
== reg
) {
97 static int vio_make_devnode(VIOsPAPRDevice
*dev
,
100 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
101 int vdevice_off
, node_off
, ret
;
104 vdevice_off
= fdt_path_offset(fdt
, "/vdevice");
105 if (vdevice_off
< 0) {
109 dt_name
= spapr_vio_get_dev_name(DEVICE(dev
));
110 node_off
= fdt_add_subnode(fdt
, vdevice_off
, dt_name
);
116 ret
= fdt_setprop_cell(fdt
, node_off
, "reg", dev
->reg
);
122 ret
= fdt_setprop_string(fdt
, node_off
, "device_type",
129 if (pc
->dt_compatible
) {
130 ret
= fdt_setprop_string(fdt
, node_off
, "compatible",
138 uint32_t ints_prop
[] = {cpu_to_be32(dev
->irq
), 0};
140 ret
= fdt_setprop(fdt
, node_off
, "interrupts", ints_prop
,
147 ret
= spapr_tcet_dma_dt(fdt
, node_off
, "ibm,my-dma-window", dev
->tcet
);
153 ret
= (pc
->devnode
)(dev
, fdt
, node_off
);
165 static target_ulong
h_reg_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
166 target_ulong opcode
, target_ulong
*args
)
168 target_ulong reg
= args
[0];
169 target_ulong queue_addr
= args
[1];
170 target_ulong queue_len
= args
[2];
171 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
174 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
178 /* We can't grok a queue size bigger than 256M for now */
179 if (queue_len
< 0x1000 || queue_len
> 0x10000000) {
180 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
185 /* Check queue alignment */
186 if (queue_addr
& 0xfff) {
187 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx
")\n", queue_addr
);
191 /* Check if device supports CRQs */
192 if (!dev
->crq
.SendFunc
) {
193 hcall_dprintf("Device does not support CRQ\n");
197 /* Already a queue ? */
198 if (dev
->crq
.qsize
) {
199 hcall_dprintf("CRQ already registered\n");
202 dev
->crq
.qladdr
= queue_addr
;
203 dev
->crq
.qsize
= queue_len
;
206 DPRINTF("CRQ for dev 0x" TARGET_FMT_lx
" registered at 0x"
207 TARGET_FMT_lx
"/0x" TARGET_FMT_lx
"\n",
208 reg
, queue_addr
, queue_len
);
212 static target_ulong
free_crq(VIOsPAPRDevice
*dev
)
218 DPRINTF("CRQ for dev 0x%" PRIx32
" freed\n", dev
->reg
);
223 static target_ulong
h_free_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
224 target_ulong opcode
, target_ulong
*args
)
226 target_ulong reg
= args
[0];
227 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
230 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
234 return free_crq(dev
);
237 static target_ulong
h_send_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
238 target_ulong opcode
, target_ulong
*args
)
240 target_ulong reg
= args
[0];
241 target_ulong msg_hi
= args
[1];
242 target_ulong msg_lo
= args
[2];
243 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
244 uint64_t crq_mangle
[2];
247 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
250 crq_mangle
[0] = cpu_to_be64(msg_hi
);
251 crq_mangle
[1] = cpu_to_be64(msg_lo
);
253 if (dev
->crq
.SendFunc
) {
254 return dev
->crq
.SendFunc(dev
, (uint8_t *)crq_mangle
);
260 static target_ulong
h_enable_crq(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
261 target_ulong opcode
, target_ulong
*args
)
263 target_ulong reg
= args
[0];
264 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
267 hcall_dprintf("Unit 0x" TARGET_FMT_lx
" does not exist\n", reg
);
274 /* Returns negative error, 0 success, or positive: queue full */
275 int spapr_vio_send_crq(VIOsPAPRDevice
*dev
, uint8_t *crq
)
280 if (!dev
->crq
.qsize
) {
281 fprintf(stderr
, "spapr_vio_send_creq on uninitialized queue\n");
285 /* Maybe do a fast path for KVM just writing to the pages */
286 rc
= spapr_vio_dma_read(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, &byte
, 1);
294 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
+ 8,
302 rc
= spapr_vio_dma_write(dev
, dev
->crq
.qladdr
+ dev
->crq
.qnext
, crq
, 8);
307 dev
->crq
.qnext
= (dev
->crq
.qnext
+ 16) % dev
->crq
.qsize
;
309 if (dev
->signal_state
& 1) {
310 qemu_irq_pulse(spapr_vio_qirq(dev
));
316 /* "quiesce" handling */
318 static void spapr_vio_quiesce_one(VIOsPAPRDevice
*dev
)
321 device_reset(DEVICE(dev
->tcet
));
326 void spapr_vio_set_bypass(VIOsPAPRDevice
*dev
, bool bypass
)
332 memory_region_set_enabled(&dev
->mrbypass
, bypass
);
333 memory_region_set_enabled(spapr_tce_get_iommu(dev
->tcet
), !bypass
);
335 dev
->tcet
->bypass
= bypass
;
338 static void rtas_set_tce_bypass(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
340 uint32_t nargs
, target_ulong args
,
341 uint32_t nret
, target_ulong rets
)
343 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
345 uint32_t unit
, enable
;
348 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
351 unit
= rtas_ld(args
, 0);
352 enable
= rtas_ld(args
, 1);
353 dev
= spapr_vio_find_by_reg(bus
, unit
);
355 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
360 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
364 spapr_vio_set_bypass(dev
, !!enable
);
366 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
369 static void rtas_quiesce(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
371 uint32_t nargs
, target_ulong args
,
372 uint32_t nret
, target_ulong rets
)
374 VIOsPAPRBus
*bus
= spapr
->vio_bus
;
376 VIOsPAPRDevice
*dev
= NULL
;
379 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
383 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
384 dev
= (VIOsPAPRDevice
*)kid
->child
;
385 spapr_vio_quiesce_one(dev
);
388 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
391 static VIOsPAPRDevice
*reg_conflict(VIOsPAPRDevice
*dev
)
393 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
395 VIOsPAPRDevice
*other
;
398 * Check for a device other than the given one which is already
399 * using the requested address. We have to open code this because
400 * the given dev might already be in the list.
402 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
403 other
= VIO_SPAPR_DEVICE(kid
->child
);
405 if (other
!= dev
&& other
->reg
== dev
->reg
) {
413 static void spapr_vio_busdev_reset(DeviceState
*qdev
)
415 VIOsPAPRDevice
*dev
= VIO_SPAPR_DEVICE(qdev
);
416 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
418 /* Shut down the request queue and TCEs if necessary */
419 spapr_vio_quiesce_one(dev
);
421 dev
->signal_state
= 0;
423 spapr_vio_set_bypass(dev
, false);
429 static void spapr_vio_busdev_realize(DeviceState
*qdev
, Error
**errp
)
431 sPAPRMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
432 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)qdev
;
433 VIOsPAPRDeviceClass
*pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
435 Error
*local_err
= NULL
;
437 if (dev
->reg
!= -1) {
439 * Explicitly assigned address, just verify that no-one else
440 * is using it. other mechanism). We have to open code this
441 * rather than using spapr_vio_find_by_reg() because sdev
442 * itself is already in the list.
444 VIOsPAPRDevice
*other
= reg_conflict(dev
);
447 error_setg(errp
, "%s and %s devices conflict at address %#x",
448 object_get_typename(OBJECT(qdev
)),
449 object_get_typename(OBJECT(&other
->qdev
)),
454 /* Need to assign an address */
455 VIOsPAPRBus
*bus
= SPAPR_VIO_BUS(dev
->qdev
.parent_bus
);
458 dev
->reg
= bus
->next_reg
++;
459 } while (reg_conflict(dev
));
462 /* Don't overwrite ids assigned on the command line */
464 id
= spapr_vio_get_dev_name(DEVICE(dev
));
468 dev
->irq
= xics_alloc(spapr
->icp
, 0, dev
->irq
, false, &local_err
);
470 error_propagate(errp
, local_err
);
474 if (pc
->rtce_window_size
) {
475 uint32_t liobn
= SPAPR_VIO_LIOBN(dev
->reg
);
477 memory_region_init(&dev
->mrroot
, OBJECT(dev
), "iommu-spapr-root",
479 memory_region_init_alias(&dev
->mrbypass
, OBJECT(dev
),
480 "iommu-spapr-bypass", get_system_memory(),
482 memory_region_add_subregion_overlap(&dev
->mrroot
, 0, &dev
->mrbypass
, 1);
483 address_space_init(&dev
->as
, &dev
->mrroot
, qdev
->id
);
485 dev
->tcet
= spapr_tce_new_table(qdev
, liobn
,
487 SPAPR_TCE_PAGE_SHIFT
,
488 pc
->rtce_window_size
>>
489 SPAPR_TCE_PAGE_SHIFT
, false);
490 dev
->tcet
->vdev
= dev
;
491 memory_region_add_subregion_overlap(&dev
->mrroot
, 0,
492 spapr_tce_get_iommu(dev
->tcet
), 2);
495 pc
->realize(dev
, errp
);
498 static target_ulong
h_vio_signal(PowerPCCPU
*cpu
, sPAPRMachineState
*spapr
,
502 target_ulong reg
= args
[0];
503 target_ulong mode
= args
[1];
504 VIOsPAPRDevice
*dev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
505 VIOsPAPRDeviceClass
*pc
;
511 pc
= VIO_SPAPR_DEVICE_GET_CLASS(dev
);
513 if (mode
& ~pc
->signal_mask
) {
517 dev
->signal_state
= mode
;
522 VIOsPAPRBus
*spapr_vio_bus_init(void)
528 /* Create bridge device */
529 dev
= qdev_create(NULL
, TYPE_SPAPR_VIO_BRIDGE
);
530 qdev_init_nofail(dev
);
532 /* Create bus on bridge device */
533 qbus
= qbus_create(TYPE_SPAPR_VIO_BUS
, dev
, "spapr-vio");
534 bus
= SPAPR_VIO_BUS(qbus
);
535 bus
->next_reg
= 0x71000000;
538 spapr_register_hypercall(H_VIO_SIGNAL
, h_vio_signal
);
541 spapr_register_hypercall(H_REG_CRQ
, h_reg_crq
);
542 spapr_register_hypercall(H_FREE_CRQ
, h_free_crq
);
543 spapr_register_hypercall(H_SEND_CRQ
, h_send_crq
);
544 spapr_register_hypercall(H_ENABLE_CRQ
, h_enable_crq
);
547 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS
, "ibm,set-tce-bypass",
548 rtas_set_tce_bypass
);
549 spapr_rtas_register(RTAS_QUIESCE
, "quiesce", rtas_quiesce
);
554 /* Represents sPAPR hcall VIO devices */
556 static int spapr_vio_bridge_init(SysBusDevice
*dev
)
562 static void spapr_vio_bridge_class_init(ObjectClass
*klass
, void *data
)
564 SysBusDeviceClass
*k
= SYS_BUS_DEVICE_CLASS(klass
);
565 DeviceClass
*dc
= DEVICE_CLASS(klass
);
567 dc
->fw_name
= "vdevice";
568 k
->init
= spapr_vio_bridge_init
;
571 static const TypeInfo spapr_vio_bridge_info
= {
572 .name
= TYPE_SPAPR_VIO_BRIDGE
,
573 .parent
= TYPE_SYS_BUS_DEVICE
,
574 .class_init
= spapr_vio_bridge_class_init
,
577 const VMStateDescription vmstate_spapr_vio
= {
580 .minimum_version_id
= 1,
581 .fields
= (VMStateField
[]) {
583 VMSTATE_UINT32_EQUAL(reg
, VIOsPAPRDevice
),
584 VMSTATE_UINT32_EQUAL(irq
, VIOsPAPRDevice
),
586 /* General VIO device state */
587 VMSTATE_UINTTL(signal_state
, VIOsPAPRDevice
),
588 VMSTATE_UINT64(crq
.qladdr
, VIOsPAPRDevice
),
589 VMSTATE_UINT32(crq
.qsize
, VIOsPAPRDevice
),
590 VMSTATE_UINT32(crq
.qnext
, VIOsPAPRDevice
),
592 VMSTATE_END_OF_LIST()
596 static void vio_spapr_device_class_init(ObjectClass
*klass
, void *data
)
598 DeviceClass
*k
= DEVICE_CLASS(klass
);
599 k
->realize
= spapr_vio_busdev_realize
;
600 k
->reset
= spapr_vio_busdev_reset
;
601 k
->bus_type
= TYPE_SPAPR_VIO_BUS
;
602 k
->props
= spapr_vio_props
;
605 static const TypeInfo spapr_vio_type_info
= {
606 .name
= TYPE_VIO_SPAPR_DEVICE
,
607 .parent
= TYPE_DEVICE
,
608 .instance_size
= sizeof(VIOsPAPRDevice
),
610 .class_size
= sizeof(VIOsPAPRDeviceClass
),
611 .class_init
= vio_spapr_device_class_init
,
614 static void spapr_vio_register_types(void)
616 type_register_static(&spapr_vio_bus_info
);
617 type_register_static(&spapr_vio_bridge_info
);
618 type_register_static(&spapr_vio_type_info
);
621 type_init(spapr_vio_register_types
)
623 static int compare_reg(const void *p1
, const void *p2
)
625 VIOsPAPRDevice
const *dev1
, *dev2
;
627 dev1
= (VIOsPAPRDevice
*)*(DeviceState
**)p1
;
628 dev2
= (VIOsPAPRDevice
*)*(DeviceState
**)p2
;
630 if (dev1
->reg
< dev2
->reg
) {
633 if (dev1
->reg
== dev2
->reg
) {
637 /* dev1->reg > dev2->reg */
641 int spapr_populate_vdevice(VIOsPAPRBus
*bus
, void *fdt
)
643 DeviceState
*qdev
, **qdevs
;
647 /* Count qdevs on the bus list */
649 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
653 /* Copy out into an array of pointers */
654 qdevs
= g_malloc(sizeof(qdev
) * num
);
656 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
657 qdevs
[num
++] = kid
->child
;
661 qsort(qdevs
, num
, sizeof(qdev
), compare_reg
);
663 /* Hack alert. Give the devices to libfdt in reverse order, we happen
664 * to know that will mean they are in forward order in the tree. */
665 for (i
= num
- 1; i
>= 0; i
--) {
666 VIOsPAPRDevice
*dev
= (VIOsPAPRDevice
*)(qdevs
[i
]);
668 ret
= vio_make_devnode(dev
, fdt
);
682 int spapr_populate_chosen_stdout(void *fdt
, VIOsPAPRBus
*bus
)
688 dev
= spapr_vty_get_default(bus
);
692 offset
= fdt_path_offset(fdt
, "/chosen");
697 name
= spapr_vio_get_dev_name(DEVICE(dev
));
698 path
= g_strdup_printf("/vdevice/%s", name
);
700 ret
= fdt_setprop_string(fdt
, offset
, "linux,stdout-path", path
);