mirror of https://gitee.com/openkylin/qemu.git
650 lines
16 KiB
C
650 lines
16 KiB
C
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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/spapr.h"
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#include "hw/spapr_vio.h"
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#include "hw/xics.h"
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#ifdef CONFIG_FDT
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#include <libfdt.h>
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#endif /* CONFIG_FDT */
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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 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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.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 char *vio_format_dev_name(VIOsPAPRDevice *dev)
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{
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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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#ifdef CONFIG_FDT
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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 = vio_format_dev_name(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->dma);
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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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#endif /* CONFIG_FDT */
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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->dma) {
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spapr_tce_reset(dev->dma);
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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->dma) {
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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->dma, !!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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}
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rtas_st(rets, 0, 0);
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}
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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);
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BusChild *kid;
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VIOsPAPRDevice *other;
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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 = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child);
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if (other != dev && other->reg == dev->reg) {
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return other;
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}
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}
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return 0;
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}
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static void spapr_vio_busdev_reset(DeviceState *qdev)
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{
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VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev);
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VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
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/* Shut down the request queue and TCEs if necessary */
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spapr_vio_quiesce_one(dev);
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dev->signal_state = 0;
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if (pc->reset) {
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pc->reset(dev);
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}
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}
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static int spapr_vio_busdev_init(DeviceState *qdev)
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{
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VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
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VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
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char *id;
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if (dev->reg != -1) {
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/*
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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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* 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);
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if (other) {
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fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
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object_get_typename(OBJECT(qdev)),
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object_get_typename(OBJECT(&other->qdev)),
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dev->reg);
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return -1;
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}
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||
|
} 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 */
|