| /* |
| * QEMU sPAPR VIO code |
| * |
| * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com> |
| * Based on the s390 virtio bus code: |
| * Copyright (c) 2009 Alexander Graf <agraf@suse.de> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "hw.h" |
| #include "sysemu/sysemu.h" |
| #include "boards.h" |
| #include "monitor/monitor.h" |
| #include "loader.h" |
| #include "elf.h" |
| #include "hw/sysbus.h" |
| #include "sysemu/kvm.h" |
| #include "sysemu/device_tree.h" |
| #include "kvm_ppc.h" |
| |
| #include "hw/spapr.h" |
| #include "hw/spapr_vio.h" |
| #include "hw/xics.h" |
| |
| #ifdef CONFIG_FDT |
| #include <libfdt.h> |
| #endif /* CONFIG_FDT */ |
| |
| /* #define DEBUG_SPAPR */ |
| |
| #ifdef DEBUG_SPAPR |
| #define dprintf(fmt, ...) \ |
| do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| #else |
| #define dprintf(fmt, ...) \ |
| do { } while (0) |
| #endif |
| |
| static Property spapr_vio_props[] = { |
| DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \ |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static const TypeInfo spapr_vio_bus_info = { |
| .name = TYPE_SPAPR_VIO_BUS, |
| .parent = TYPE_BUS, |
| .instance_size = sizeof(VIOsPAPRBus), |
| }; |
| |
| VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg) |
| { |
| BusChild *kid; |
| VIOsPAPRDevice *dev = NULL; |
| |
| QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| dev = (VIOsPAPRDevice *)kid->child; |
| if (dev->reg == reg) { |
| return dev; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static char *vio_format_dev_name(VIOsPAPRDevice *dev) |
| { |
| VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| char *name; |
| |
| /* Device tree style name device@reg */ |
| if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) { |
| return NULL; |
| } |
| |
| return name; |
| } |
| |
| #ifdef CONFIG_FDT |
| static int vio_make_devnode(VIOsPAPRDevice *dev, |
| void *fdt) |
| { |
| VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| int vdevice_off, node_off, ret; |
| char *dt_name; |
| |
| vdevice_off = fdt_path_offset(fdt, "/vdevice"); |
| if (vdevice_off < 0) { |
| return vdevice_off; |
| } |
| |
| dt_name = vio_format_dev_name(dev); |
| if (!dt_name) { |
| return -ENOMEM; |
| } |
| |
| node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); |
| free(dt_name); |
| if (node_off < 0) { |
| return node_off; |
| } |
| |
| ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| if (pc->dt_type) { |
| ret = fdt_setprop_string(fdt, node_off, "device_type", |
| pc->dt_type); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| if (pc->dt_compatible) { |
| ret = fdt_setprop_string(fdt, node_off, "compatible", |
| pc->dt_compatible); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| if (dev->irq) { |
| uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0}; |
| |
| ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop, |
| sizeof(ints_prop)); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->dma); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| if (pc->devnode) { |
| ret = (pc->devnode)(dev, fdt, node_off); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| return node_off; |
| } |
| #endif /* CONFIG_FDT */ |
| |
| /* |
| * CRQ handling |
| */ |
| static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| target_ulong opcode, target_ulong *args) |
| { |
| target_ulong reg = args[0]; |
| target_ulong queue_addr = args[1]; |
| target_ulong queue_len = args[2]; |
| VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| |
| if (!dev) { |
| hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| return H_PARAMETER; |
| } |
| |
| /* We can't grok a queue size bigger than 256M for now */ |
| if (queue_len < 0x1000 || queue_len > 0x10000000) { |
| hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx |
| ")\n", queue_len); |
| return H_PARAMETER; |
| } |
| |
| /* Check queue alignment */ |
| if (queue_addr & 0xfff) { |
| hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr); |
| return H_PARAMETER; |
| } |
| |
| /* Check if device supports CRQs */ |
| if (!dev->crq.SendFunc) { |
| hcall_dprintf("Device does not support CRQ\n"); |
| return H_NOT_FOUND; |
| } |
| |
| /* Already a queue ? */ |
| if (dev->crq.qsize) { |
| hcall_dprintf("CRQ already registered\n"); |
| return H_RESOURCE; |
| } |
| dev->crq.qladdr = queue_addr; |
| dev->crq.qsize = queue_len; |
| dev->crq.qnext = 0; |
| |
| dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
| TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
| reg, queue_addr, queue_len); |
| return H_SUCCESS; |
| } |
| |
| static target_ulong free_crq(VIOsPAPRDevice *dev) |
| { |
| dev->crq.qladdr = 0; |
| dev->crq.qsize = 0; |
| dev->crq.qnext = 0; |
| |
| dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg); |
| |
| return H_SUCCESS; |
| } |
| |
| static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| target_ulong opcode, target_ulong *args) |
| { |
| target_ulong reg = args[0]; |
| VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| |
| if (!dev) { |
| hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| return H_PARAMETER; |
| } |
| |
| return free_crq(dev); |
| } |
| |
| static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| target_ulong opcode, target_ulong *args) |
| { |
| target_ulong reg = args[0]; |
| target_ulong msg_hi = args[1]; |
| target_ulong msg_lo = args[2]; |
| VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| uint64_t crq_mangle[2]; |
| |
| if (!dev) { |
| hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| return H_PARAMETER; |
| } |
| crq_mangle[0] = cpu_to_be64(msg_hi); |
| crq_mangle[1] = cpu_to_be64(msg_lo); |
| |
| if (dev->crq.SendFunc) { |
| return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle); |
| } |
| |
| return H_HARDWARE; |
| } |
| |
| static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| target_ulong opcode, target_ulong *args) |
| { |
| target_ulong reg = args[0]; |
| VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| |
| if (!dev) { |
| hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| return H_PARAMETER; |
| } |
| |
| return 0; |
| } |
| |
| /* Returns negative error, 0 success, or positive: queue full */ |
| int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq) |
| { |
| int rc; |
| uint8_t byte; |
| |
| if (!dev->crq.qsize) { |
| fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n"); |
| return -1; |
| } |
| |
| /* Maybe do a fast path for KVM just writing to the pages */ |
| rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1); |
| if (rc) { |
| return rc; |
| } |
| if (byte != 0) { |
| return 1; |
| } |
| |
| rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8, |
| &crq[8], 8); |
| if (rc) { |
| return rc; |
| } |
| |
| kvmppc_eieio(); |
| |
| rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8); |
| if (rc) { |
| return rc; |
| } |
| |
| dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize; |
| |
| if (dev->signal_state & 1) { |
| qemu_irq_pulse(spapr_vio_qirq(dev)); |
| } |
| |
| return 0; |
| } |
| |
| /* "quiesce" handling */ |
| |
| static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
| { |
| if (dev->dma) { |
| spapr_tce_reset(dev->dma); |
| } |
| free_crq(dev); |
| } |
| |
| static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
| uint32_t nargs, target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| VIOsPAPRBus *bus = spapr->vio_bus; |
| VIOsPAPRDevice *dev; |
| uint32_t unit, enable; |
| |
| if (nargs != 2) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| unit = rtas_ld(args, 0); |
| enable = rtas_ld(args, 1); |
| dev = spapr_vio_find_by_reg(bus, unit); |
| if (!dev) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| |
| if (!dev->dma) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| |
| spapr_tce_set_bypass(dev->dma, !!enable); |
| |
| rtas_st(rets, 0, 0); |
| } |
| |
| static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
| uint32_t nargs, target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| VIOsPAPRBus *bus = spapr->vio_bus; |
| BusChild *kid; |
| VIOsPAPRDevice *dev = NULL; |
| |
| if (nargs != 0) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| |
| QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| dev = (VIOsPAPRDevice *)kid->child; |
| spapr_vio_quiesce_one(dev); |
| } |
| |
| rtas_st(rets, 0, 0); |
| } |
| |
| static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev) |
| { |
| VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
| BusChild *kid; |
| VIOsPAPRDevice *other; |
| |
| /* |
| * Check for a device other than the given one which is already |
| * using the requested address. We have to open code this because |
| * the given dev might already be in the list. |
| */ |
| QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| other = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child); |
| |
| if (other != dev && other->reg == dev->reg) { |
| return other; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void spapr_vio_busdev_reset(DeviceState *qdev) |
| { |
| VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev); |
| VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| |
| /* Shut down the request queue and TCEs if necessary */ |
| spapr_vio_quiesce_one(dev); |
| |
| dev->signal_state = 0; |
| |
| if (pc->reset) { |
| pc->reset(dev); |
| } |
| } |
| |
| static int spapr_vio_busdev_init(DeviceState *qdev) |
| { |
| VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
| VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| char *id; |
| |
| if (dev->reg != -1) { |
| /* |
| * Explicitly assigned address, just verify that no-one else |
| * is using it. other mechanism). We have to open code this |
| * rather than using spapr_vio_find_by_reg() because sdev |
| * itself is already in the list. |
| */ |
| VIOsPAPRDevice *other = reg_conflict(dev); |
| |
| if (other) { |
| fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n", |
| object_get_typename(OBJECT(qdev)), |
| object_get_typename(OBJECT(&other->qdev)), |
| dev->reg); |
| return -1; |
| } |
| } else { |
| /* Need to assign an address */ |
| VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
| |
| do { |
| dev->reg = bus->next_reg++; |
| } while (reg_conflict(dev)); |
| } |
| |
| /* Don't overwrite ids assigned on the command line */ |
| if (!dev->qdev.id) { |
| id = vio_format_dev_name(dev); |
| if (!id) { |
| return -1; |
| } |
| dev->qdev.id = id; |
| } |
| |
| dev->irq = spapr_allocate_msi(dev->irq); |
| if (!dev->irq) { |
| return -1; |
| } |
| |
| if (pc->rtce_window_size) { |
| uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg; |
| dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size); |
| } |
| |
| return pc->init(dev); |
| } |
| |
| static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| target_ulong opcode, |
| target_ulong *args) |
| { |
| target_ulong reg = args[0]; |
| target_ulong mode = args[1]; |
| VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| VIOsPAPRDeviceClass *pc; |
| |
| if (!dev) { |
| return H_PARAMETER; |
| } |
| |
| pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| |
| if (mode & ~pc->signal_mask) { |
| return H_PARAMETER; |
| } |
| |
| dev->signal_state = mode; |
| |
| return H_SUCCESS; |
| } |
| |
| VIOsPAPRBus *spapr_vio_bus_init(void) |
| { |
| VIOsPAPRBus *bus; |
| BusState *qbus; |
| DeviceState *dev; |
| |
| /* Create bridge device */ |
| dev = qdev_create(NULL, "spapr-vio-bridge"); |
| qdev_init_nofail(dev); |
| |
| /* Create bus on bridge device */ |
| |
| qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio"); |
| bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
| bus->next_reg = 0x1000; |
| |
| /* hcall-vio */ |
| spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
| |
| /* hcall-crq */ |
| spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
| spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
| spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
| spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
| |
| /* RTAS calls */ |
| spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass); |
| spapr_rtas_register("quiesce", rtas_quiesce); |
| |
| return bus; |
| } |
| |
| /* Represents sPAPR hcall VIO devices */ |
| |
| static int spapr_vio_bridge_init(SysBusDevice *dev) |
| { |
| /* nothing */ |
| return 0; |
| } |
| |
| static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| |
| k->init = spapr_vio_bridge_init; |
| dc->no_user = 1; |
| } |
| |
| static TypeInfo spapr_vio_bridge_info = { |
| .name = "spapr-vio-bridge", |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(SysBusDevice), |
| .class_init = spapr_vio_bridge_class_init, |
| }; |
| |
| static void vio_spapr_device_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *k = DEVICE_CLASS(klass); |
| k->init = spapr_vio_busdev_init; |
| k->reset = spapr_vio_busdev_reset; |
| k->bus_type = TYPE_SPAPR_VIO_BUS; |
| k->props = spapr_vio_props; |
| } |
| |
| static TypeInfo spapr_vio_type_info = { |
| .name = TYPE_VIO_SPAPR_DEVICE, |
| .parent = TYPE_DEVICE, |
| .instance_size = sizeof(VIOsPAPRDevice), |
| .abstract = true, |
| .class_size = sizeof(VIOsPAPRDeviceClass), |
| .class_init = vio_spapr_device_class_init, |
| }; |
| |
| static void spapr_vio_register_types(void) |
| { |
| type_register_static(&spapr_vio_bus_info); |
| type_register_static(&spapr_vio_bridge_info); |
| type_register_static(&spapr_vio_type_info); |
| } |
| |
| type_init(spapr_vio_register_types) |
| |
| #ifdef CONFIG_FDT |
| static int compare_reg(const void *p1, const void *p2) |
| { |
| VIOsPAPRDevice const *dev1, *dev2; |
| |
| dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1; |
| dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2; |
| |
| if (dev1->reg < dev2->reg) { |
| return -1; |
| } |
| if (dev1->reg == dev2->reg) { |
| return 0; |
| } |
| |
| /* dev1->reg > dev2->reg */ |
| return 1; |
| } |
| |
| int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
| { |
| DeviceState *qdev, **qdevs; |
| BusChild *kid; |
| int i, num, ret = 0; |
| |
| /* Count qdevs on the bus list */ |
| num = 0; |
| QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| num++; |
| } |
| |
| /* Copy out into an array of pointers */ |
| qdevs = g_malloc(sizeof(qdev) * num); |
| num = 0; |
| QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| qdevs[num++] = kid->child; |
| } |
| |
| /* Sort the array */ |
| qsort(qdevs, num, sizeof(qdev), compare_reg); |
| |
| /* Hack alert. Give the devices to libfdt in reverse order, we happen |
| * to know that will mean they are in forward order in the tree. */ |
| for (i = num - 1; i >= 0; i--) { |
| VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]); |
| |
| ret = vio_make_devnode(dev, fdt); |
| |
| if (ret < 0) { |
| goto out; |
| } |
| } |
| |
| ret = 0; |
| out: |
| free(qdevs); |
| |
| return ret; |
| } |
| |
| int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus) |
| { |
| VIOsPAPRDevice *dev; |
| char *name, *path; |
| int ret, offset; |
| |
| dev = spapr_vty_get_default(bus); |
| if (!dev) |
| return 0; |
| |
| offset = fdt_path_offset(fdt, "/chosen"); |
| if (offset < 0) { |
| return offset; |
| } |
| |
| name = vio_format_dev_name(dev); |
| if (!name) { |
| return -ENOMEM; |
| } |
| |
| if (asprintf(&path, "/vdevice/%s", name) < 0) { |
| path = NULL; |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path); |
| out: |
| free(name); |
| free(path); |
| |
| return ret; |
| } |
| #endif /* CONFIG_FDT */ |