root / hw / ppc / spapr_vio.c @ df32fd1c
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/*
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* QEMU sPAPR VIO code
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*
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* Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
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* Based on the s390 virtio bus code:
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* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw/hw.h" |
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#include "sysemu/sysemu.h" |
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#include "hw/boards.h" |
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#include "monitor/monitor.h" |
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#include "hw/loader.h" |
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#include "elf.h" |
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#include "hw/sysbus.h" |
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#include "sysemu/kvm.h" |
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#include "sysemu/device_tree.h" |
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#include "kvm_ppc.h" |
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#include "hw/ppc/spapr.h" |
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#include "hw/ppc/spapr_vio.h" |
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#include "hw/ppc/xics.h" |
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#include <libfdt.h> |
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/* #define DEBUG_SPAPR */
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#ifdef DEBUG_SPAPR
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#define dprintf(fmt, ...) \
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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#else
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#define dprintf(fmt, ...) \
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do { } while (0) |
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#endif
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static Property spapr_vio_props[] = {
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DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \ |
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DEFINE_PROP_END_OF_LIST(), |
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}; |
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static char *spapr_vio_get_dev_name(DeviceState *qdev) |
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{ |
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VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev); |
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VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
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char *name;
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/* Device tree style name device@reg */
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name = g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
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return name;
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} |
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static void spapr_vio_bus_class_init(ObjectClass *klass, void *data) |
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{ |
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BusClass *k = BUS_CLASS(klass); |
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k->get_dev_path = spapr_vio_get_dev_name; |
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} |
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static const TypeInfo spapr_vio_bus_info = { |
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.name = TYPE_SPAPR_VIO_BUS, |
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.parent = TYPE_BUS, |
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.class_init = spapr_vio_bus_class_init, |
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.instance_size = sizeof(VIOsPAPRBus),
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}; |
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VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg) |
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{ |
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BusChild *kid; |
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VIOsPAPRDevice *dev = NULL;
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QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
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dev = (VIOsPAPRDevice *)kid->child; |
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if (dev->reg == reg) {
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return dev;
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} |
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} |
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return NULL; |
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} |
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static int vio_make_devnode(VIOsPAPRDevice *dev, |
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void *fdt)
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{ |
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VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
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int vdevice_off, node_off, ret;
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char *dt_name;
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vdevice_off = fdt_path_offset(fdt, "/vdevice");
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if (vdevice_off < 0) { |
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return vdevice_off;
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} |
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dt_name = spapr_vio_get_dev_name(DEVICE(dev)); |
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node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); |
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g_free(dt_name); |
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if (node_off < 0) { |
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return node_off;
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} |
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ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
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if (ret < 0) { |
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return ret;
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} |
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if (pc->dt_type) {
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ret = fdt_setprop_string(fdt, node_off, "device_type",
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pc->dt_type); |
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if (ret < 0) { |
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return ret;
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} |
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} |
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if (pc->dt_compatible) {
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ret = fdt_setprop_string(fdt, node_off, "compatible",
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pc->dt_compatible); |
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if (ret < 0) { |
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return ret;
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} |
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} |
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if (dev->irq) {
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uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};
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ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
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sizeof(ints_prop));
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if (ret < 0) { |
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return ret;
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} |
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} |
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ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
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if (ret < 0) { |
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return ret;
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} |
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if (pc->devnode) {
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ret = (pc->devnode)(dev, fdt, node_off); |
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if (ret < 0) { |
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return ret;
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} |
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} |
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return node_off;
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} |
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/*
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* CRQ handling
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*/
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static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
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{ |
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target_ulong reg = args[0];
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target_ulong queue_addr = args[1];
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target_ulong queue_len = args[2];
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VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
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if (!dev) {
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hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
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return H_PARAMETER;
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} |
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/* We can't grok a queue size bigger than 256M for now */
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if (queue_len < 0x1000 || queue_len > 0x10000000) { |
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hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
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")\n", queue_len);
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return H_PARAMETER;
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} |
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/* Check queue alignment */
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if (queue_addr & 0xfff) { |
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hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr); |
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return H_PARAMETER;
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} |
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/* Check if device supports CRQs */
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if (!dev->crq.SendFunc) {
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hcall_dprintf("Device does not support CRQ\n");
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return H_NOT_FOUND;
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} |
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/* Already a queue ? */
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if (dev->crq.qsize) {
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hcall_dprintf("CRQ already registered\n");
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return H_RESOURCE;
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} |
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dev->crq.qladdr = queue_addr; |
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dev->crq.qsize = queue_len; |
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dev->crq.qnext = 0;
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dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
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TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
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reg, queue_addr, queue_len); |
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return H_SUCCESS;
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} |
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static target_ulong free_crq(VIOsPAPRDevice *dev)
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{ |
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dev->crq.qladdr = 0;
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dev->crq.qsize = 0;
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dev->crq.qnext = 0;
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dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg); |
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return H_SUCCESS;
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} |
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static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
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{ |
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target_ulong reg = args[0];
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VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
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if (!dev) {
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hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
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return H_PARAMETER;
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} |
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return free_crq(dev);
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} |
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static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
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{ |
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target_ulong reg = args[0];
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target_ulong msg_hi = args[1];
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target_ulong msg_lo = args[2];
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VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
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uint64_t crq_mangle[2];
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if (!dev) {
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hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
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return H_PARAMETER;
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} |
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crq_mangle[0] = cpu_to_be64(msg_hi);
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crq_mangle[1] = cpu_to_be64(msg_lo);
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if (dev->crq.SendFunc) {
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return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
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} |
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return H_HARDWARE;
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} |
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static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
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{ |
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target_ulong reg = args[0];
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VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
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if (!dev) {
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hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
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return H_PARAMETER;
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} |
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return 0; |
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} |
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/* Returns negative error, 0 success, or positive: queue full */
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int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
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{ |
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int rc;
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uint8_t byte; |
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if (!dev->crq.qsize) {
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fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
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return -1; |
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} |
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/* Maybe do a fast path for KVM just writing to the pages */
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rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
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if (rc) {
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return rc;
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} |
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if (byte != 0) { |
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return 1; |
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} |
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rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
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&crq[8], 8); |
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if (rc) {
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return rc;
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} |
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kvmppc_eieio(); |
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rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
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if (rc) {
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return rc;
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} |
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dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
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if (dev->signal_state & 1) { |
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qemu_irq_pulse(spapr_vio_qirq(dev)); |
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} |
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return 0; |
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} |
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/* "quiesce" handling */
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static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
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{ |
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if (dev->tcet) {
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spapr_tce_reset(dev->tcet); |
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} |
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free_crq(dev); |
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} |
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static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
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uint32_t nargs, target_ulong args, |
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uint32_t nret, target_ulong rets) |
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{ |
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VIOsPAPRBus *bus = spapr->vio_bus; |
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VIOsPAPRDevice *dev; |
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uint32_t unit, enable; |
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if (nargs != 2) { |
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rtas_st(rets, 0, -3); |
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return;
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} |
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unit = rtas_ld(args, 0);
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enable = rtas_ld(args, 1);
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dev = spapr_vio_find_by_reg(bus, unit); |
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if (!dev) {
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rtas_st(rets, 0, -3); |
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return;
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} |
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if (!dev->tcet) {
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rtas_st(rets, 0, -3); |
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return;
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} |
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spapr_tce_set_bypass(dev->tcet, !!enable); |
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rtas_st(rets, 0, 0); |
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} |
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static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
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uint32_t nargs, target_ulong args, |
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uint32_t nret, target_ulong rets) |
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{ |
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VIOsPAPRBus *bus = spapr->vio_bus; |
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BusChild *kid; |
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VIOsPAPRDevice *dev = NULL;
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if (nargs != 0) { |
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rtas_st(rets, 0, -3); |
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return;
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} |
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QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
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dev = (VIOsPAPRDevice *)kid->child; |
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spapr_vio_quiesce_one(dev); |
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} |
371 |
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rtas_st(rets, 0, 0); |
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} |
374 |
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static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
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{ |
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VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
378 |
BusChild *kid; |
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VIOsPAPRDevice *other; |
380 |
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/*
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* Check for a device other than the given one which is already
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* using the requested address. We have to open code this because
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* the given dev might already be in the list.
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*/
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QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
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other = VIO_SPAPR_DEVICE(kid->child); |
388 |
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if (other != dev && other->reg == dev->reg) {
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return other;
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} |
392 |
} |
393 |
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return 0; |
395 |
} |
396 |
|
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static void spapr_vio_busdev_reset(DeviceState *qdev) |
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{ |
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VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev); |
400 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
401 |
|
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/* Shut down the request queue and TCEs if necessary */
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spapr_vio_quiesce_one(dev); |
404 |
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dev->signal_state = 0;
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406 |
|
407 |
if (pc->reset) {
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408 |
pc->reset(dev); |
409 |
} |
410 |
} |
411 |
|
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static int spapr_vio_busdev_init(DeviceState *qdev) |
413 |
{ |
414 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
415 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
416 |
char *id;
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417 |
|
418 |
if (dev->reg != -1) { |
419 |
/*
|
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* Explicitly assigned address, just verify that no-one else
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* is using it. other mechanism). We have to open code this
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422 |
* rather than using spapr_vio_find_by_reg() because sdev
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* itself is already in the list.
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*/
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VIOsPAPRDevice *other = reg_conflict(dev); |
426 |
|
427 |
if (other) {
|
428 |
fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
|
429 |
object_get_typename(OBJECT(qdev)), |
430 |
object_get_typename(OBJECT(&other->qdev)), |
431 |
dev->reg); |
432 |
return -1; |
433 |
} |
434 |
} else {
|
435 |
/* Need to assign an address */
|
436 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
437 |
|
438 |
do {
|
439 |
dev->reg = bus->next_reg++; |
440 |
} while (reg_conflict(dev));
|
441 |
} |
442 |
|
443 |
/* Don't overwrite ids assigned on the command line */
|
444 |
if (!dev->qdev.id) {
|
445 |
id = spapr_vio_get_dev_name(DEVICE(dev)); |
446 |
dev->qdev.id = id; |
447 |
} |
448 |
|
449 |
dev->irq = spapr_allocate_msi(dev->irq); |
450 |
if (!dev->irq) {
|
451 |
return -1; |
452 |
} |
453 |
|
454 |
if (pc->rtce_window_size) {
|
455 |
uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg; |
456 |
dev->tcet = spapr_tce_new_table(liobn, pc->rtce_window_size); |
457 |
address_space_init(&dev->as, spapr_tce_get_iommu(dev->tcet)); |
458 |
} |
459 |
|
460 |
return pc->init(dev);
|
461 |
} |
462 |
|
463 |
static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
464 |
target_ulong opcode, |
465 |
target_ulong *args) |
466 |
{ |
467 |
target_ulong reg = args[0];
|
468 |
target_ulong mode = args[1];
|
469 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
470 |
VIOsPAPRDeviceClass *pc; |
471 |
|
472 |
if (!dev) {
|
473 |
return H_PARAMETER;
|
474 |
} |
475 |
|
476 |
pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
477 |
|
478 |
if (mode & ~pc->signal_mask) {
|
479 |
return H_PARAMETER;
|
480 |
} |
481 |
|
482 |
dev->signal_state = mode; |
483 |
|
484 |
return H_SUCCESS;
|
485 |
} |
486 |
|
487 |
VIOsPAPRBus *spapr_vio_bus_init(void)
|
488 |
{ |
489 |
VIOsPAPRBus *bus; |
490 |
BusState *qbus; |
491 |
DeviceState *dev; |
492 |
|
493 |
/* Create bridge device */
|
494 |
dev = qdev_create(NULL, "spapr-vio-bridge"); |
495 |
qdev_init_nofail(dev); |
496 |
|
497 |
/* Create bus on bridge device */
|
498 |
|
499 |
qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
|
500 |
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
501 |
bus->next_reg = 0x71000000;
|
502 |
|
503 |
/* hcall-vio */
|
504 |
spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
505 |
|
506 |
/* hcall-crq */
|
507 |
spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
508 |
spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
509 |
spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
510 |
spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
511 |
|
512 |
/* RTAS calls */
|
513 |
spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
|
514 |
spapr_rtas_register("quiesce", rtas_quiesce);
|
515 |
|
516 |
return bus;
|
517 |
} |
518 |
|
519 |
/* Represents sPAPR hcall VIO devices */
|
520 |
|
521 |
static int spapr_vio_bridge_init(SysBusDevice *dev) |
522 |
{ |
523 |
/* nothing */
|
524 |
return 0; |
525 |
} |
526 |
|
527 |
static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data) |
528 |
{ |
529 |
DeviceClass *dc = DEVICE_CLASS(klass); |
530 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
531 |
|
532 |
k->init = spapr_vio_bridge_init; |
533 |
dc->no_user = 1;
|
534 |
} |
535 |
|
536 |
static const TypeInfo spapr_vio_bridge_info = { |
537 |
.name = "spapr-vio-bridge",
|
538 |
.parent = TYPE_SYS_BUS_DEVICE, |
539 |
.instance_size = sizeof(SysBusDevice),
|
540 |
.class_init = spapr_vio_bridge_class_init, |
541 |
}; |
542 |
|
543 |
static void vio_spapr_device_class_init(ObjectClass *klass, void *data) |
544 |
{ |
545 |
DeviceClass *k = DEVICE_CLASS(klass); |
546 |
k->init = spapr_vio_busdev_init; |
547 |
k->reset = spapr_vio_busdev_reset; |
548 |
k->bus_type = TYPE_SPAPR_VIO_BUS; |
549 |
k->props = spapr_vio_props; |
550 |
} |
551 |
|
552 |
static const TypeInfo spapr_vio_type_info = { |
553 |
.name = TYPE_VIO_SPAPR_DEVICE, |
554 |
.parent = TYPE_DEVICE, |
555 |
.instance_size = sizeof(VIOsPAPRDevice),
|
556 |
.abstract = true,
|
557 |
.class_size = sizeof(VIOsPAPRDeviceClass),
|
558 |
.class_init = vio_spapr_device_class_init, |
559 |
}; |
560 |
|
561 |
static void spapr_vio_register_types(void) |
562 |
{ |
563 |
type_register_static(&spapr_vio_bus_info); |
564 |
type_register_static(&spapr_vio_bridge_info); |
565 |
type_register_static(&spapr_vio_type_info); |
566 |
} |
567 |
|
568 |
type_init(spapr_vio_register_types) |
569 |
|
570 |
static int compare_reg(const void *p1, const void *p2) |
571 |
{ |
572 |
VIOsPAPRDevice const *dev1, *dev2;
|
573 |
|
574 |
dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1; |
575 |
dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2; |
576 |
|
577 |
if (dev1->reg < dev2->reg) {
|
578 |
return -1; |
579 |
} |
580 |
if (dev1->reg == dev2->reg) {
|
581 |
return 0; |
582 |
} |
583 |
|
584 |
/* dev1->reg > dev2->reg */
|
585 |
return 1; |
586 |
} |
587 |
|
588 |
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
589 |
{ |
590 |
DeviceState *qdev, **qdevs; |
591 |
BusChild *kid; |
592 |
int i, num, ret = 0; |
593 |
|
594 |
/* Count qdevs on the bus list */
|
595 |
num = 0;
|
596 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
597 |
num++; |
598 |
} |
599 |
|
600 |
/* Copy out into an array of pointers */
|
601 |
qdevs = g_malloc(sizeof(qdev) * num);
|
602 |
num = 0;
|
603 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
604 |
qdevs[num++] = kid->child; |
605 |
} |
606 |
|
607 |
/* Sort the array */
|
608 |
qsort(qdevs, num, sizeof(qdev), compare_reg);
|
609 |
|
610 |
/* Hack alert. Give the devices to libfdt in reverse order, we happen
|
611 |
* to know that will mean they are in forward order in the tree. */
|
612 |
for (i = num - 1; i >= 0; i--) { |
613 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]); |
614 |
|
615 |
ret = vio_make_devnode(dev, fdt); |
616 |
|
617 |
if (ret < 0) { |
618 |
goto out;
|
619 |
} |
620 |
} |
621 |
|
622 |
ret = 0;
|
623 |
out:
|
624 |
free(qdevs); |
625 |
|
626 |
return ret;
|
627 |
} |
628 |
|
629 |
int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus) |
630 |
{ |
631 |
VIOsPAPRDevice *dev; |
632 |
char *name, *path;
|
633 |
int ret, offset;
|
634 |
|
635 |
dev = spapr_vty_get_default(bus); |
636 |
if (!dev)
|
637 |
return 0; |
638 |
|
639 |
offset = fdt_path_offset(fdt, "/chosen");
|
640 |
if (offset < 0) { |
641 |
return offset;
|
642 |
} |
643 |
|
644 |
name = spapr_vio_get_dev_name(DEVICE(dev)); |
645 |
path = g_strdup_printf("/vdevice/%s", name);
|
646 |
|
647 |
ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
|
648 |
|
649 |
g_free(name); |
650 |
g_free(path); |
651 |
|
652 |
return ret;
|
653 |
} |