diff options
Diffstat (limited to 'qemu/hw/ppc/spapr_vio.c')
| -rw-r--r-- | qemu/hw/ppc/spapr_vio.c | 706 |
1 files changed, 0 insertions, 706 deletions
diff --git a/qemu/hw/ppc/spapr_vio.c b/qemu/hw/ppc/spapr_vio.c deleted file mode 100644 index 8aa021fde..000000000 --- a/qemu/hw/ppc/spapr_vio.c +++ /dev/null @@ -1,706 +0,0 @@ -/* - * 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 "qemu/osdep.h" -#include "qapi/error.h" -#include "hw/hw.h" -#include "sysemu/sysemu.h" -#include "hw/boards.h" -#include "hw/loader.h" -#include "elf.h" -#include "hw/sysbus.h" -#include "sysemu/kvm.h" -#include "sysemu/device_tree.h" -#include "kvm_ppc.h" - -#include "hw/ppc/spapr.h" -#include "hw/ppc/spapr_vio.h" -#include "hw/ppc/xics.h" - -#include <libfdt.h> - -/* #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 char *spapr_vio_get_dev_name(DeviceState *qdev) -{ - VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev); - 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; -} - -static void spapr_vio_bus_class_init(ObjectClass *klass, void *data) -{ - BusClass *k = BUS_CLASS(klass); - - k->get_dev_path = spapr_vio_get_dev_name; - k->get_fw_dev_path = spapr_vio_get_dev_name; -} - -static const TypeInfo spapr_vio_bus_info = { - .name = TYPE_SPAPR_VIO_BUS, - .parent = TYPE_BUS, - .class_init = spapr_vio_bus_class_init, - .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 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 = spapr_vio_get_dev_name(DEVICE(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->tcet); - if (ret < 0) { - return ret; - } - - if (pc->devnode) { - ret = (pc->devnode)(dev, fdt, node_off); - if (ret < 0) { - return ret; - } - } - - return node_off; -} - -/* - * CRQ handling - */ -static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPRMachineState *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, sPAPRMachineState *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, sPAPRMachineState *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, sPAPRMachineState *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->tcet) { - device_reset(DEVICE(dev->tcet)); - } - free_crq(dev); -} - -void spapr_vio_set_bypass(VIOsPAPRDevice *dev, bool bypass) -{ - if (!dev->tcet) { - return; - } - - memory_region_set_enabled(&dev->mrbypass, bypass); - memory_region_set_enabled(spapr_tce_get_iommu(dev->tcet), !bypass); - - dev->tcet->bypass = bypass; -} - -static void rtas_set_tce_bypass(PowerPCCPU *cpu, sPAPRMachineState *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, RTAS_OUT_PARAM_ERROR); - 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, RTAS_OUT_PARAM_ERROR); - return; - } - - if (!dev->tcet) { - rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); - return; - } - - spapr_vio_set_bypass(dev, !!enable); - - rtas_st(rets, 0, RTAS_OUT_SUCCESS); -} - -static void rtas_quiesce(PowerPCCPU *cpu, sPAPRMachineState *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, RTAS_OUT_PARAM_ERROR); - return; - } - - QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { - dev = (VIOsPAPRDevice *)kid->child; - spapr_vio_quiesce_one(dev); - } - - rtas_st(rets, 0, RTAS_OUT_SUCCESS); -} - -static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev) -{ - VIOsPAPRBus *bus = SPAPR_VIO_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 = VIO_SPAPR_DEVICE(kid->child); - - if (other != dev && other->reg == dev->reg) { - return other; - } - } - - return 0; -} - -static void spapr_vio_busdev_reset(DeviceState *qdev) -{ - VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(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; - - spapr_vio_set_bypass(dev, false); - if (pc->reset) { - pc->reset(dev); - } -} - -static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp) -{ - sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); - VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; - VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); - char *id; - Error *local_err = NULL; - - 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) { - error_setg(errp, "%s and %s devices conflict at address %#x", - object_get_typename(OBJECT(qdev)), - object_get_typename(OBJECT(&other->qdev)), - dev->reg); - return; - } - } else { - /* Need to assign an address */ - VIOsPAPRBus *bus = SPAPR_VIO_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 = spapr_vio_get_dev_name(DEVICE(dev)); - dev->qdev.id = id; - } - - dev->irq = xics_alloc(spapr->icp, 0, dev->irq, false, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - if (pc->rtce_window_size) { - uint32_t liobn = SPAPR_VIO_LIOBN(dev->reg); - - memory_region_init(&dev->mrroot, OBJECT(dev), "iommu-spapr-root", - ram_size); - memory_region_init_alias(&dev->mrbypass, OBJECT(dev), - "iommu-spapr-bypass", get_system_memory(), - 0, ram_size); - memory_region_add_subregion_overlap(&dev->mrroot, 0, &dev->mrbypass, 1); - address_space_init(&dev->as, &dev->mrroot, qdev->id); - - dev->tcet = spapr_tce_new_table(qdev, liobn, - 0, - SPAPR_TCE_PAGE_SHIFT, - pc->rtce_window_size >> - SPAPR_TCE_PAGE_SHIFT, false); - dev->tcet->vdev = dev; - memory_region_add_subregion_overlap(&dev->mrroot, 0, - spapr_tce_get_iommu(dev->tcet), 2); - } - - pc->realize(dev, errp); -} - -static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPRMachineState *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, TYPE_SPAPR_VIO_BRIDGE); - qdev_init_nofail(dev); - - /* Create bus on bridge device */ - qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio"); - bus = SPAPR_VIO_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(RTAS_IBM_SET_TCE_BYPASS, "ibm,set-tce-bypass", - rtas_set_tce_bypass); - spapr_rtas_register(RTAS_QUIESCE, "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) -{ - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - DeviceClass *dc = DEVICE_CLASS(klass); - - dc->fw_name = "vdevice"; - k->init = spapr_vio_bridge_init; -} - -static const TypeInfo spapr_vio_bridge_info = { - .name = TYPE_SPAPR_VIO_BRIDGE, - .parent = TYPE_SYS_BUS_DEVICE, - .class_init = spapr_vio_bridge_class_init, -}; - -const VMStateDescription vmstate_spapr_vio = { - .name = "spapr_vio", - .version_id = 1, - .minimum_version_id = 1, - .fields = (VMStateField[]) { - /* Sanity check */ - VMSTATE_UINT32_EQUAL(reg, VIOsPAPRDevice), - VMSTATE_UINT32_EQUAL(irq, VIOsPAPRDevice), - - /* General VIO device state */ - VMSTATE_UINTTL(signal_state, VIOsPAPRDevice), - VMSTATE_UINT64(crq.qladdr, VIOsPAPRDevice), - VMSTATE_UINT32(crq.qsize, VIOsPAPRDevice), - VMSTATE_UINT32(crq.qnext, VIOsPAPRDevice), - - VMSTATE_END_OF_LIST() - }, -}; - -static void vio_spapr_device_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *k = DEVICE_CLASS(klass); - k->realize = spapr_vio_busdev_realize; - 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) - -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: - g_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 = spapr_vio_get_dev_name(DEVICE(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; -} |