root / hw / spapr_vio.c @ c48c6522
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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.h" |
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#include "sysemu.h" |
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#include "boards.h" |
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#include "monitor.h" |
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#include "loader.h" |
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#include "elf.h" |
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#include "hw/sysbus.h" |
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#include "kvm.h" |
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#include "device_tree.h" |
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#include "kvm_ppc.h" |
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|
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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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|
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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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|
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/* #define DEBUG_SPAPR */
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/* #define DEBUG_TCE */
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|
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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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|
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static Property spapr_vio_props[] = {
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DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, vio_irq_num, 0), \ |
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DEFINE_PROP_END_OF_LIST(), |
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}; |
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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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|
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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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|
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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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|
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/* Device tree style name device@reg */
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if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) { |
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return NULL; |
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} |
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|
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return name;
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} |
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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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|
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dt_name = vio_format_dev_name(dev); |
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if (!dt_name) {
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return -ENOMEM;
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} |
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node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); |
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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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|
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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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|
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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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|
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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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|
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if (dev->qirq) {
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uint32_t ints_prop[] = {cpu_to_be32(dev->vio_irq_num), 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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|
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if (dev->rtce_window_size) {
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uint32_t dma_prop[] = {cpu_to_be32(dev->reg),
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0, 0, |
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0, cpu_to_be32(dev->rtce_window_size)};
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ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); |
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if (ret < 0) { |
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return ret;
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} |
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ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); |
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if (ret < 0) { |
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return ret;
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} |
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ret = fdt_setprop(fdt, node_off, "ibm,my-dma-window", dma_prop,
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sizeof(dma_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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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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/*
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* RTCE handling
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*/
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|
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static void rtce_init(VIOsPAPRDevice *dev) |
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{
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size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
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* sizeof(VIOsPAPR_RTCE);
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if (size) {
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dev->rtce_table = kvmppc_create_spapr_tce(dev->reg, |
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dev->rtce_window_size, |
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&dev->kvmtce_fd); |
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|
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if (!dev->rtce_table) {
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dev->rtce_table = g_malloc0(size); |
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} |
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} |
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} |
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static target_ulong h_put_tce(CPUPPCState *env, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
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{
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target_ulong liobn = args[0];
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target_ulong ioba = args[1];
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target_ulong tce = args[2];
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VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, liobn); |
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VIOsPAPR_RTCE *rtce; |
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|
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if (!dev) {
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hcall_dprintf("LIOBN 0x" TARGET_FMT_lx " does not exist\n", liobn); |
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return H_PARAMETER;
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} |
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ioba &= ~(SPAPR_VIO_TCE_PAGE_SIZE - 1);
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#ifdef DEBUG_TCE
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fprintf(stderr, "spapr_vio_put_tce on %s ioba 0x" TARGET_FMT_lx
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" TCE 0x" TARGET_FMT_lx "\n", dev->qdev.id, ioba, tce); |
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#endif
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|
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if (ioba >= dev->rtce_window_size) {
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hcall_dprintf("Out-of-bounds IOBA 0x" TARGET_FMT_lx "\n", ioba); |
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return H_PARAMETER;
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} |
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rtce = dev->rtce_table + (ioba >> SPAPR_VIO_TCE_PAGE_SHIFT); |
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rtce->tce = tce; |
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return H_SUCCESS;
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} |
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|
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int spapr_vio_check_tces(VIOsPAPRDevice *dev, target_ulong ioba,
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target_ulong len, enum VIOsPAPR_TCEAccess access)
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{
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int start, end, i;
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|
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start = ioba >> SPAPR_VIO_TCE_PAGE_SHIFT; |
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end = (ioba + len - 1) >> SPAPR_VIO_TCE_PAGE_SHIFT;
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for (i = start; i <= end; i++) {
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if ((dev->rtce_table[i].tce & access) != access) {
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#ifdef DEBUG_TCE
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fprintf(stderr, "FAIL on %d\n", i);
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#endif
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return -1; |
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} |
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} |
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return 0; |
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} |
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|
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int spapr_tce_dma_write(VIOsPAPRDevice *dev, uint64_t taddr, const void *buf, |
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uint32_t size) |
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{
|
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#ifdef DEBUG_TCE
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fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
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(unsigned long long)taddr, size); |
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#endif
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|
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/* Check for bypass */
|
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if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
|
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cpu_physical_memory_write(taddr, buf, size); |
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return 0; |
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} |
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|
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while (size) {
|
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uint64_t tce; |
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uint32_t lsize; |
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uint64_t txaddr; |
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|
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/* Check if we are in bound */
|
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if (taddr >= dev->rtce_window_size) {
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#ifdef DEBUG_TCE
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fprintf(stderr, "spapr_tce_dma_write out of bounds\n");
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#endif
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return H_DEST_PARM;
|
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} |
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tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
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|
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/* How much til end of page ? */
|
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lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
|
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|
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/* Check TCE */
|
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if (!(tce & 2)) { |
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return H_DEST_PARM;
|
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} |
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|
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/* Translate */
|
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txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
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(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
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|
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#ifdef DEBUG_TCE
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fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
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(unsigned long long)txaddr, lsize); |
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#endif
|
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|
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/* Do it */
|
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cpu_physical_memory_write(txaddr, buf, lsize); |
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buf += lsize; |
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taddr += lsize; |
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size -= lsize; |
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} |
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return 0; |
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} |
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|
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int spapr_tce_dma_zero(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t size)
|
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{
|
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/* FIXME: allocating a temp buffer is nasty, but just stepping
|
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* through writing zeroes is awkward. This will do for now. */
|
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uint8_t zeroes[size]; |
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|
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#ifdef DEBUG_TCE
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fprintf(stderr, "spapr_tce_dma_zero taddr=0x%llx size=0x%x\n",
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(unsigned long long)taddr, size); |
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#endif
|
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|
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memset(zeroes, 0, size);
|
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return spapr_tce_dma_write(dev, taddr, zeroes, size);
|
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} |
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|
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void stb_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint8_t val)
|
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{
|
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spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
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} |
| 324 |
|
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void sth_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint16_t val)
|
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{
|
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val = tswap16(val); |
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spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
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} |
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|
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|
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void stw_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t val)
|
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{
|
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val = tswap32(val); |
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spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
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} |
| 337 |
|
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void stq_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint64_t val)
|
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{
|
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val = tswap64(val); |
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spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
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} |
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|
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int spapr_tce_dma_read(VIOsPAPRDevice *dev, uint64_t taddr, void *buf, |
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uint32_t size) |
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{
|
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#ifdef DEBUG_TCE
|
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fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
|
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(unsigned long long)taddr, size); |
| 350 |
#endif
|
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|
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/* Check for bypass */
|
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if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
|
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cpu_physical_memory_read(taddr, buf, size); |
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return 0; |
| 356 |
} |
| 357 |
|
| 358 |
while (size) {
|
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uint64_t tce; |
| 360 |
uint32_t lsize; |
| 361 |
uint64_t txaddr; |
| 362 |
|
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/* Check if we are in bound */
|
| 364 |
if (taddr >= dev->rtce_window_size) {
|
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#ifdef DEBUG_TCE
|
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fprintf(stderr, "spapr_tce_dma_read out of bounds\n");
|
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#endif
|
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return H_DEST_PARM;
|
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} |
| 370 |
tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
| 371 |
|
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/* How much til end of page ? */
|
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lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
|
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|
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/* Check TCE */
|
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if (!(tce & 1)) { |
| 377 |
return H_DEST_PARM;
|
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} |
| 379 |
|
| 380 |
/* Translate */
|
| 381 |
txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
| 382 |
(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
| 383 |
|
| 384 |
#ifdef DEBUG_TCE
|
| 385 |
fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
|
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(unsigned long long)txaddr, lsize); |
| 387 |
#endif
|
| 388 |
/* Do it */
|
| 389 |
cpu_physical_memory_read(txaddr, buf, lsize); |
| 390 |
buf += lsize; |
| 391 |
taddr += lsize; |
| 392 |
size -= lsize; |
| 393 |
} |
| 394 |
return H_SUCCESS;
|
| 395 |
} |
| 396 |
|
| 397 |
uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr) |
| 398 |
{
|
| 399 |
uint64_t val; |
| 400 |
|
| 401 |
spapr_tce_dma_read(dev, taddr, &val, sizeof(val));
|
| 402 |
return tswap64(val);
|
| 403 |
} |
| 404 |
|
| 405 |
/*
|
| 406 |
* CRQ handling
|
| 407 |
*/
|
| 408 |
static target_ulong h_reg_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
| 409 |
target_ulong opcode, target_ulong *args) |
| 410 |
{
|
| 411 |
target_ulong reg = args[0];
|
| 412 |
target_ulong queue_addr = args[1];
|
| 413 |
target_ulong queue_len = args[2];
|
| 414 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 415 |
|
| 416 |
if (!dev) {
|
| 417 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 418 |
return H_PARAMETER;
|
| 419 |
} |
| 420 |
|
| 421 |
/* We can't grok a queue size bigger than 256M for now */
|
| 422 |
if (queue_len < 0x1000 || queue_len > 0x10000000) { |
| 423 |
hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
|
| 424 |
")\n", queue_len);
|
| 425 |
return H_PARAMETER;
|
| 426 |
} |
| 427 |
|
| 428 |
/* Check queue alignment */
|
| 429 |
if (queue_addr & 0xfff) { |
| 430 |
hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr); |
| 431 |
return H_PARAMETER;
|
| 432 |
} |
| 433 |
|
| 434 |
/* Check if device supports CRQs */
|
| 435 |
if (!dev->crq.SendFunc) {
|
| 436 |
hcall_dprintf("Device does not support CRQ\n");
|
| 437 |
return H_NOT_FOUND;
|
| 438 |
} |
| 439 |
|
| 440 |
/* Already a queue ? */
|
| 441 |
if (dev->crq.qsize) {
|
| 442 |
hcall_dprintf("CRQ already registered\n");
|
| 443 |
return H_RESOURCE;
|
| 444 |
} |
| 445 |
dev->crq.qladdr = queue_addr; |
| 446 |
dev->crq.qsize = queue_len; |
| 447 |
dev->crq.qnext = 0;
|
| 448 |
|
| 449 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
| 450 |
TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
| 451 |
reg, queue_addr, queue_len); |
| 452 |
return H_SUCCESS;
|
| 453 |
} |
| 454 |
|
| 455 |
static target_ulong free_crq(VIOsPAPRDevice *dev)
|
| 456 |
{
|
| 457 |
dev->crq.qladdr = 0;
|
| 458 |
dev->crq.qsize = 0;
|
| 459 |
dev->crq.qnext = 0;
|
| 460 |
|
| 461 |
dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg); |
| 462 |
|
| 463 |
return H_SUCCESS;
|
| 464 |
} |
| 465 |
|
| 466 |
static target_ulong h_free_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
| 467 |
target_ulong opcode, target_ulong *args) |
| 468 |
{
|
| 469 |
target_ulong reg = args[0];
|
| 470 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 471 |
|
| 472 |
if (!dev) {
|
| 473 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 474 |
return H_PARAMETER;
|
| 475 |
} |
| 476 |
|
| 477 |
return free_crq(dev);
|
| 478 |
} |
| 479 |
|
| 480 |
static target_ulong h_send_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
| 481 |
target_ulong opcode, target_ulong *args) |
| 482 |
{
|
| 483 |
target_ulong reg = args[0];
|
| 484 |
target_ulong msg_hi = args[1];
|
| 485 |
target_ulong msg_lo = args[2];
|
| 486 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 487 |
uint64_t crq_mangle[2];
|
| 488 |
|
| 489 |
if (!dev) {
|
| 490 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 491 |
return H_PARAMETER;
|
| 492 |
} |
| 493 |
crq_mangle[0] = cpu_to_be64(msg_hi);
|
| 494 |
crq_mangle[1] = cpu_to_be64(msg_lo);
|
| 495 |
|
| 496 |
if (dev->crq.SendFunc) {
|
| 497 |
return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
|
| 498 |
} |
| 499 |
|
| 500 |
return H_HARDWARE;
|
| 501 |
} |
| 502 |
|
| 503 |
static target_ulong h_enable_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
| 504 |
target_ulong opcode, target_ulong *args) |
| 505 |
{
|
| 506 |
target_ulong reg = args[0];
|
| 507 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 508 |
|
| 509 |
if (!dev) {
|
| 510 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 511 |
return H_PARAMETER;
|
| 512 |
} |
| 513 |
|
| 514 |
return 0; |
| 515 |
} |
| 516 |
|
| 517 |
/* Returns negative error, 0 success, or positive: queue full */
|
| 518 |
int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
|
| 519 |
{
|
| 520 |
int rc;
|
| 521 |
uint8_t byte; |
| 522 |
|
| 523 |
if (!dev->crq.qsize) {
|
| 524 |
fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
|
| 525 |
return -1; |
| 526 |
} |
| 527 |
|
| 528 |
/* Maybe do a fast path for KVM just writing to the pages */
|
| 529 |
rc = spapr_tce_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
|
| 530 |
if (rc) {
|
| 531 |
return rc;
|
| 532 |
} |
| 533 |
if (byte != 0) { |
| 534 |
return 1; |
| 535 |
} |
| 536 |
|
| 537 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
|
| 538 |
&crq[8], 8); |
| 539 |
if (rc) {
|
| 540 |
return rc;
|
| 541 |
} |
| 542 |
|
| 543 |
kvmppc_eieio(); |
| 544 |
|
| 545 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
|
| 546 |
if (rc) {
|
| 547 |
return rc;
|
| 548 |
} |
| 549 |
|
| 550 |
dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
|
| 551 |
|
| 552 |
if (dev->signal_state & 1) { |
| 553 |
qemu_irq_pulse(dev->qirq); |
| 554 |
} |
| 555 |
|
| 556 |
return 0; |
| 557 |
} |
| 558 |
|
| 559 |
/* "quiesce" handling */
|
| 560 |
|
| 561 |
static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
| 562 |
{
|
| 563 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
| 564 |
|
| 565 |
if (dev->rtce_table) {
|
| 566 |
size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
| 567 |
* sizeof(VIOsPAPR_RTCE);
|
| 568 |
memset(dev->rtce_table, 0, size);
|
| 569 |
} |
| 570 |
|
| 571 |
dev->crq.qladdr = 0;
|
| 572 |
dev->crq.qsize = 0;
|
| 573 |
dev->crq.qnext = 0;
|
| 574 |
} |
| 575 |
|
| 576 |
static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
| 577 |
uint32_t nargs, target_ulong args, |
| 578 |
uint32_t nret, target_ulong rets) |
| 579 |
{
|
| 580 |
VIOsPAPRBus *bus = spapr->vio_bus; |
| 581 |
VIOsPAPRDevice *dev; |
| 582 |
uint32_t unit, enable; |
| 583 |
|
| 584 |
if (nargs != 2) { |
| 585 |
rtas_st(rets, 0, -3); |
| 586 |
return;
|
| 587 |
} |
| 588 |
unit = rtas_ld(args, 0);
|
| 589 |
enable = rtas_ld(args, 1);
|
| 590 |
dev = spapr_vio_find_by_reg(bus, unit); |
| 591 |
if (!dev) {
|
| 592 |
rtas_st(rets, 0, -3); |
| 593 |
return;
|
| 594 |
} |
| 595 |
if (enable) {
|
| 596 |
dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS; |
| 597 |
} else {
|
| 598 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
| 599 |
} |
| 600 |
|
| 601 |
rtas_st(rets, 0, 0); |
| 602 |
} |
| 603 |
|
| 604 |
static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
| 605 |
uint32_t nargs, target_ulong args, |
| 606 |
uint32_t nret, target_ulong rets) |
| 607 |
{
|
| 608 |
VIOsPAPRBus *bus = spapr->vio_bus; |
| 609 |
BusChild *kid; |
| 610 |
VIOsPAPRDevice *dev = NULL;
|
| 611 |
|
| 612 |
if (nargs != 0) { |
| 613 |
rtas_st(rets, 0, -3); |
| 614 |
return;
|
| 615 |
} |
| 616 |
|
| 617 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
|
| 618 |
dev = (VIOsPAPRDevice *)kid->child; |
| 619 |
spapr_vio_quiesce_one(dev); |
| 620 |
} |
| 621 |
|
| 622 |
rtas_st(rets, 0, 0); |
| 623 |
} |
| 624 |
|
| 625 |
static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
|
| 626 |
{
|
| 627 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
| 628 |
BusChild *kid; |
| 629 |
VIOsPAPRDevice *other; |
| 630 |
|
| 631 |
/*
|
| 632 |
* Check for a device other than the given one which is already
|
| 633 |
* using the requested address. We have to open code this because
|
| 634 |
* the given dev might already be in the list.
|
| 635 |
*/
|
| 636 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
|
| 637 |
other = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child); |
| 638 |
|
| 639 |
if (other != dev && other->reg == dev->reg) {
|
| 640 |
return other;
|
| 641 |
} |
| 642 |
} |
| 643 |
|
| 644 |
return 0; |
| 645 |
} |
| 646 |
|
| 647 |
static void spapr_vio_busdev_reset(DeviceState *qdev) |
| 648 |
{
|
| 649 |
VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev); |
| 650 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 651 |
|
| 652 |
if (dev->crq.qsize) {
|
| 653 |
free_crq(dev); |
| 654 |
} |
| 655 |
|
| 656 |
if (pc->reset) {
|
| 657 |
pc->reset(dev); |
| 658 |
} |
| 659 |
} |
| 660 |
|
| 661 |
static int spapr_vio_busdev_init(DeviceState *qdev) |
| 662 |
{
|
| 663 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
| 664 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 665 |
char *id;
|
| 666 |
|
| 667 |
if (dev->reg != -1) { |
| 668 |
/*
|
| 669 |
* Explicitly assigned address, just verify that no-one else
|
| 670 |
* is using it. other mechanism). We have to open code this
|
| 671 |
* rather than using spapr_vio_find_by_reg() because sdev
|
| 672 |
* itself is already in the list.
|
| 673 |
*/
|
| 674 |
VIOsPAPRDevice *other = reg_conflict(dev); |
| 675 |
|
| 676 |
if (other) {
|
| 677 |
fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
|
| 678 |
object_get_typename(OBJECT(qdev)), |
| 679 |
object_get_typename(OBJECT(&other->qdev)), |
| 680 |
dev->reg); |
| 681 |
return -1; |
| 682 |
} |
| 683 |
} else {
|
| 684 |
/* Need to assign an address */
|
| 685 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
| 686 |
|
| 687 |
do {
|
| 688 |
dev->reg = bus->next_reg++; |
| 689 |
} while (reg_conflict(dev));
|
| 690 |
} |
| 691 |
|
| 692 |
/* Don't overwrite ids assigned on the command line */
|
| 693 |
if (!dev->qdev.id) {
|
| 694 |
id = vio_format_dev_name(dev); |
| 695 |
if (!id) {
|
| 696 |
return -1; |
| 697 |
} |
| 698 |
dev->qdev.id = id; |
| 699 |
} |
| 700 |
|
| 701 |
dev->qirq = spapr_allocate_msi(dev->vio_irq_num, &dev->vio_irq_num); |
| 702 |
if (!dev->qirq) {
|
| 703 |
return -1; |
| 704 |
} |
| 705 |
|
| 706 |
rtce_init(dev); |
| 707 |
|
| 708 |
return pc->init(dev);
|
| 709 |
} |
| 710 |
|
| 711 |
static target_ulong h_vio_signal(CPUPPCState *env, sPAPREnvironment *spapr,
|
| 712 |
target_ulong opcode, |
| 713 |
target_ulong *args) |
| 714 |
{
|
| 715 |
target_ulong reg = args[0];
|
| 716 |
target_ulong mode = args[1];
|
| 717 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 718 |
VIOsPAPRDeviceClass *pc; |
| 719 |
|
| 720 |
if (!dev) {
|
| 721 |
return H_PARAMETER;
|
| 722 |
} |
| 723 |
|
| 724 |
pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 725 |
|
| 726 |
if (mode & ~pc->signal_mask) {
|
| 727 |
return H_PARAMETER;
|
| 728 |
} |
| 729 |
|
| 730 |
dev->signal_state = mode; |
| 731 |
|
| 732 |
return H_SUCCESS;
|
| 733 |
} |
| 734 |
|
| 735 |
VIOsPAPRBus *spapr_vio_bus_init(void)
|
| 736 |
{
|
| 737 |
VIOsPAPRBus *bus; |
| 738 |
BusState *qbus; |
| 739 |
DeviceState *dev; |
| 740 |
|
| 741 |
/* Create bridge device */
|
| 742 |
dev = qdev_create(NULL, "spapr-vio-bridge"); |
| 743 |
qdev_init_nofail(dev); |
| 744 |
|
| 745 |
/* Create bus on bridge device */
|
| 746 |
|
| 747 |
qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
|
| 748 |
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
| 749 |
bus->next_reg = 0x1000;
|
| 750 |
|
| 751 |
/* hcall-vio */
|
| 752 |
spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
| 753 |
|
| 754 |
/* hcall-tce */
|
| 755 |
spapr_register_hypercall(H_PUT_TCE, h_put_tce); |
| 756 |
|
| 757 |
/* hcall-crq */
|
| 758 |
spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
| 759 |
spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
| 760 |
spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
| 761 |
spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
| 762 |
|
| 763 |
/* RTAS calls */
|
| 764 |
spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
|
| 765 |
spapr_rtas_register("quiesce", rtas_quiesce);
|
| 766 |
|
| 767 |
return bus;
|
| 768 |
} |
| 769 |
|
| 770 |
/* Represents sPAPR hcall VIO devices */
|
| 771 |
|
| 772 |
static int spapr_vio_bridge_init(SysBusDevice *dev) |
| 773 |
{
|
| 774 |
/* nothing */
|
| 775 |
return 0; |
| 776 |
} |
| 777 |
|
| 778 |
static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data) |
| 779 |
{
|
| 780 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 781 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| 782 |
|
| 783 |
k->init = spapr_vio_bridge_init; |
| 784 |
dc->no_user = 1;
|
| 785 |
} |
| 786 |
|
| 787 |
static TypeInfo spapr_vio_bridge_info = {
|
| 788 |
.name = "spapr-vio-bridge",
|
| 789 |
.parent = TYPE_SYS_BUS_DEVICE, |
| 790 |
.instance_size = sizeof(SysBusDevice),
|
| 791 |
.class_init = spapr_vio_bridge_class_init, |
| 792 |
}; |
| 793 |
|
| 794 |
static void vio_spapr_device_class_init(ObjectClass *klass, void *data) |
| 795 |
{
|
| 796 |
DeviceClass *k = DEVICE_CLASS(klass); |
| 797 |
k->init = spapr_vio_busdev_init; |
| 798 |
k->reset = spapr_vio_busdev_reset; |
| 799 |
k->bus_type = TYPE_SPAPR_VIO_BUS; |
| 800 |
k->props = spapr_vio_props; |
| 801 |
} |
| 802 |
|
| 803 |
static TypeInfo spapr_vio_type_info = {
|
| 804 |
.name = TYPE_VIO_SPAPR_DEVICE, |
| 805 |
.parent = TYPE_DEVICE, |
| 806 |
.instance_size = sizeof(VIOsPAPRDevice),
|
| 807 |
.abstract = true,
|
| 808 |
.class_size = sizeof(VIOsPAPRDeviceClass),
|
| 809 |
.class_init = vio_spapr_device_class_init, |
| 810 |
}; |
| 811 |
|
| 812 |
static void spapr_vio_register_types(void) |
| 813 |
{
|
| 814 |
type_register_static(&spapr_vio_bus_info); |
| 815 |
type_register_static(&spapr_vio_bridge_info); |
| 816 |
type_register_static(&spapr_vio_type_info); |
| 817 |
} |
| 818 |
|
| 819 |
type_init(spapr_vio_register_types) |
| 820 |
|
| 821 |
#ifdef CONFIG_FDT
|
| 822 |
static int compare_reg(const void *p1, const void *p2) |
| 823 |
{
|
| 824 |
VIOsPAPRDevice const *dev1, *dev2;
|
| 825 |
|
| 826 |
dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1; |
| 827 |
dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2; |
| 828 |
|
| 829 |
if (dev1->reg < dev2->reg) {
|
| 830 |
return -1; |
| 831 |
} |
| 832 |
if (dev1->reg == dev2->reg) {
|
| 833 |
return 0; |
| 834 |
} |
| 835 |
|
| 836 |
/* dev1->reg > dev2->reg */
|
| 837 |
return 1; |
| 838 |
} |
| 839 |
|
| 840 |
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
| 841 |
{
|
| 842 |
DeviceState *qdev, **qdevs; |
| 843 |
BusChild *kid; |
| 844 |
int i, num, ret = 0; |
| 845 |
|
| 846 |
/* Count qdevs on the bus list */
|
| 847 |
num = 0;
|
| 848 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
|
| 849 |
num++; |
| 850 |
} |
| 851 |
|
| 852 |
/* Copy out into an array of pointers */
|
| 853 |
qdevs = g_malloc(sizeof(qdev) * num);
|
| 854 |
num = 0;
|
| 855 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
|
| 856 |
qdevs[num++] = kid->child; |
| 857 |
} |
| 858 |
|
| 859 |
/* Sort the array */
|
| 860 |
qsort(qdevs, num, sizeof(qdev), compare_reg);
|
| 861 |
|
| 862 |
/* Hack alert. Give the devices to libfdt in reverse order, we happen
|
| 863 |
* to know that will mean they are in forward order in the tree. */
|
| 864 |
for (i = num - 1; i >= 0; i--) { |
| 865 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]); |
| 866 |
|
| 867 |
ret = vio_make_devnode(dev, fdt); |
| 868 |
|
| 869 |
if (ret < 0) { |
| 870 |
goto out;
|
| 871 |
} |
| 872 |
} |
| 873 |
|
| 874 |
ret = 0;
|
| 875 |
out:
|
| 876 |
free(qdevs); |
| 877 |
|
| 878 |
return ret;
|
| 879 |
} |
| 880 |
|
| 881 |
int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus) |
| 882 |
{
|
| 883 |
VIOsPAPRDevice *dev; |
| 884 |
char *name, *path;
|
| 885 |
int ret, offset;
|
| 886 |
|
| 887 |
dev = spapr_vty_get_default(bus); |
| 888 |
if (!dev)
|
| 889 |
return 0; |
| 890 |
|
| 891 |
offset = fdt_path_offset(fdt, "/chosen");
|
| 892 |
if (offset < 0) { |
| 893 |
return offset;
|
| 894 |
} |
| 895 |
|
| 896 |
name = vio_format_dev_name(dev); |
| 897 |
if (!name) {
|
| 898 |
return -ENOMEM;
|
| 899 |
} |
| 900 |
|
| 901 |
if (asprintf(&path, "/vdevice/%s", name) < 0) { |
| 902 |
path = NULL;
|
| 903 |
ret = -ENOMEM; |
| 904 |
goto out;
|
| 905 |
} |
| 906 |
|
| 907 |
ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
|
| 908 |
out:
|
| 909 |
free(name); |
| 910 |
free(path); |
| 911 |
|
| 912 |
return ret;
|
| 913 |
} |
| 914 |
#endif /* CONFIG_FDT */ |