/* * 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 */ name = g_strdup_printf("%s@%x", pc->dt_name, dev->reg); 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); node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); g_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); 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 = 0x71000000; /* 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 const 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 const 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); path = g_strdup_printf("/vdevice/%s", name); ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path); g_free(name); g_free(path); return ret; } #endif /* CONFIG_FDT */