root / hw / spapr_vio.c @ 5414dec6
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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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#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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/* #define DEBUG_TCE */
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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 struct BusInfo spapr_vio_bus_info = { |
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.name = "spapr-vio",
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.size = sizeof(VIOsPAPRBus),
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.props = (Property[]) { |
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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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VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg) |
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{ |
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DeviceState *qdev; |
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VIOsPAPRDevice *dev = NULL;
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QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
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dev = (VIOsPAPRDevice *)qdev; |
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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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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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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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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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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->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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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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* RTCE handling
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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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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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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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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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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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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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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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/* 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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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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/* 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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/* How much til end of page ? */
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lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
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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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/* 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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#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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/* 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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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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#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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memset(zeroes, 0, size);
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return spapr_tce_dma_write(dev, taddr, zeroes, size);
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} |
317 |
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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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} |
322 |
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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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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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} |
335 |
|
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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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} |
341 |
|
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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); |
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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_read(taddr, buf, size); |
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return 0; |
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} |
355 |
|
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while (size) {
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uint64_t tce; |
358 |
uint32_t lsize; |
359 |
uint64_t txaddr; |
360 |
|
361 |
/* Check if we are in bound */
|
362 |
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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} |
368 |
tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
369 |
|
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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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372 |
|
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/* Check TCE */
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374 |
if (!(tce & 1)) { |
375 |
return H_DEST_PARM;
|
376 |
} |
377 |
|
378 |
/* Translate */
|
379 |
txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
380 |
(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
381 |
|
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#ifdef DEBUG_TCE
|
383 |
fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
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(unsigned long long)txaddr, lsize); |
385 |
#endif
|
386 |
/* Do it */
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387 |
cpu_physical_memory_read(txaddr, buf, lsize); |
388 |
buf += lsize; |
389 |
taddr += lsize; |
390 |
size -= lsize; |
391 |
} |
392 |
return H_SUCCESS;
|
393 |
} |
394 |
|
395 |
uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr) |
396 |
{ |
397 |
uint64_t val; |
398 |
|
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spapr_tce_dma_read(dev, taddr, &val, sizeof(val));
|
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return tswap64(val);
|
401 |
} |
402 |
|
403 |
/*
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* CRQ handling
|
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*/
|
406 |
static target_ulong h_reg_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
407 |
target_ulong opcode, target_ulong *args) |
408 |
{ |
409 |
target_ulong reg = args[0];
|
410 |
target_ulong queue_addr = args[1];
|
411 |
target_ulong queue_len = args[2];
|
412 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
413 |
|
414 |
if (!dev) {
|
415 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
416 |
return H_PARAMETER;
|
417 |
} |
418 |
|
419 |
/* We can't grok a queue size bigger than 256M for now */
|
420 |
if (queue_len < 0x1000 || queue_len > 0x10000000) { |
421 |
hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
|
422 |
")\n", queue_len);
|
423 |
return H_PARAMETER;
|
424 |
} |
425 |
|
426 |
/* Check queue alignment */
|
427 |
if (queue_addr & 0xfff) { |
428 |
hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr); |
429 |
return H_PARAMETER;
|
430 |
} |
431 |
|
432 |
/* Check if device supports CRQs */
|
433 |
if (!dev->crq.SendFunc) {
|
434 |
hcall_dprintf("Device does not support CRQ\n");
|
435 |
return H_NOT_FOUND;
|
436 |
} |
437 |
|
438 |
/* Already a queue ? */
|
439 |
if (dev->crq.qsize) {
|
440 |
hcall_dprintf("CRQ already registered\n");
|
441 |
return H_RESOURCE;
|
442 |
} |
443 |
dev->crq.qladdr = queue_addr; |
444 |
dev->crq.qsize = queue_len; |
445 |
dev->crq.qnext = 0;
|
446 |
|
447 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
448 |
TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
449 |
reg, queue_addr, queue_len); |
450 |
return H_SUCCESS;
|
451 |
} |
452 |
|
453 |
static target_ulong free_crq(VIOsPAPRDevice *dev)
|
454 |
{ |
455 |
dev->crq.qladdr = 0;
|
456 |
dev->crq.qsize = 0;
|
457 |
dev->crq.qnext = 0;
|
458 |
|
459 |
dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg); |
460 |
|
461 |
return H_SUCCESS;
|
462 |
} |
463 |
|
464 |
static target_ulong h_free_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
465 |
target_ulong opcode, target_ulong *args) |
466 |
{ |
467 |
target_ulong reg = args[0];
|
468 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
469 |
|
470 |
if (!dev) {
|
471 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
472 |
return H_PARAMETER;
|
473 |
} |
474 |
|
475 |
return free_crq(dev);
|
476 |
} |
477 |
|
478 |
static target_ulong h_send_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
479 |
target_ulong opcode, target_ulong *args) |
480 |
{ |
481 |
target_ulong reg = args[0];
|
482 |
target_ulong msg_hi = args[1];
|
483 |
target_ulong msg_lo = args[2];
|
484 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
485 |
uint64_t crq_mangle[2];
|
486 |
|
487 |
if (!dev) {
|
488 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
489 |
return H_PARAMETER;
|
490 |
} |
491 |
crq_mangle[0] = cpu_to_be64(msg_hi);
|
492 |
crq_mangle[1] = cpu_to_be64(msg_lo);
|
493 |
|
494 |
if (dev->crq.SendFunc) {
|
495 |
return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
|
496 |
} |
497 |
|
498 |
return H_HARDWARE;
|
499 |
} |
500 |
|
501 |
static target_ulong h_enable_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
502 |
target_ulong opcode, target_ulong *args) |
503 |
{ |
504 |
target_ulong reg = args[0];
|
505 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
506 |
|
507 |
if (!dev) {
|
508 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
509 |
return H_PARAMETER;
|
510 |
} |
511 |
|
512 |
return 0; |
513 |
} |
514 |
|
515 |
/* Returns negative error, 0 success, or positive: queue full */
|
516 |
int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
|
517 |
{ |
518 |
int rc;
|
519 |
uint8_t byte; |
520 |
|
521 |
if (!dev->crq.qsize) {
|
522 |
fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
|
523 |
return -1; |
524 |
} |
525 |
|
526 |
/* Maybe do a fast path for KVM just writing to the pages */
|
527 |
rc = spapr_tce_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
|
528 |
if (rc) {
|
529 |
return rc;
|
530 |
} |
531 |
if (byte != 0) { |
532 |
return 1; |
533 |
} |
534 |
|
535 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
|
536 |
&crq[8], 8); |
537 |
if (rc) {
|
538 |
return rc;
|
539 |
} |
540 |
|
541 |
kvmppc_eieio(); |
542 |
|
543 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
|
544 |
if (rc) {
|
545 |
return rc;
|
546 |
} |
547 |
|
548 |
dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
|
549 |
|
550 |
if (dev->signal_state & 1) { |
551 |
qemu_irq_pulse(dev->qirq); |
552 |
} |
553 |
|
554 |
return 0; |
555 |
} |
556 |
|
557 |
/* "quiesce" handling */
|
558 |
|
559 |
static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
560 |
{ |
561 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
562 |
|
563 |
if (dev->rtce_table) {
|
564 |
size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
565 |
* sizeof(VIOsPAPR_RTCE);
|
566 |
memset(dev->rtce_table, 0, size);
|
567 |
} |
568 |
|
569 |
dev->crq.qladdr = 0;
|
570 |
dev->crq.qsize = 0;
|
571 |
dev->crq.qnext = 0;
|
572 |
} |
573 |
|
574 |
static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
575 |
uint32_t nargs, target_ulong args, |
576 |
uint32_t nret, target_ulong rets) |
577 |
{ |
578 |
VIOsPAPRBus *bus = spapr->vio_bus; |
579 |
VIOsPAPRDevice *dev; |
580 |
uint32_t unit, enable; |
581 |
|
582 |
if (nargs != 2) { |
583 |
rtas_st(rets, 0, -3); |
584 |
return;
|
585 |
} |
586 |
unit = rtas_ld(args, 0);
|
587 |
enable = rtas_ld(args, 1);
|
588 |
dev = spapr_vio_find_by_reg(bus, unit); |
589 |
if (!dev) {
|
590 |
rtas_st(rets, 0, -3); |
591 |
return;
|
592 |
} |
593 |
if (enable) {
|
594 |
dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS; |
595 |
} else {
|
596 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
597 |
} |
598 |
|
599 |
rtas_st(rets, 0, 0); |
600 |
} |
601 |
|
602 |
static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
603 |
uint32_t nargs, target_ulong args, |
604 |
uint32_t nret, target_ulong rets) |
605 |
{ |
606 |
VIOsPAPRBus *bus = spapr->vio_bus; |
607 |
DeviceState *qdev; |
608 |
VIOsPAPRDevice *dev = NULL;
|
609 |
|
610 |
if (nargs != 0) { |
611 |
rtas_st(rets, 0, -3); |
612 |
return;
|
613 |
} |
614 |
|
615 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
616 |
dev = (VIOsPAPRDevice *)qdev; |
617 |
spapr_vio_quiesce_one(dev); |
618 |
} |
619 |
|
620 |
rtas_st(rets, 0, 0); |
621 |
} |
622 |
|
623 |
static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
|
624 |
{ |
625 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
626 |
DeviceState *qdev; |
627 |
VIOsPAPRDevice *other; |
628 |
|
629 |
/*
|
630 |
* Check for a device other than the given one which is already
|
631 |
* using the requested address. We have to open code this because
|
632 |
* the given dev might already be in the list.
|
633 |
*/
|
634 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
635 |
other = DO_UPCAST(VIOsPAPRDevice, qdev, qdev); |
636 |
|
637 |
if (other != dev && other->reg == dev->reg) {
|
638 |
return other;
|
639 |
} |
640 |
} |
641 |
|
642 |
return 0; |
643 |
} |
644 |
|
645 |
static void spapr_vio_busdev_reset(DeviceState *qdev) |
646 |
{ |
647 |
VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev); |
648 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
649 |
|
650 |
if (dev->crq.qsize) {
|
651 |
free_crq(dev); |
652 |
} |
653 |
|
654 |
if (pc->reset) {
|
655 |
pc->reset(dev); |
656 |
} |
657 |
} |
658 |
|
659 |
static int spapr_vio_busdev_init(DeviceState *qdev) |
660 |
{ |
661 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
662 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
663 |
char *id;
|
664 |
|
665 |
if (dev->reg != -1) { |
666 |
/*
|
667 |
* Explicitly assigned address, just verify that no-one else
|
668 |
* is using it. other mechanism). We have to open code this
|
669 |
* rather than using spapr_vio_find_by_reg() because sdev
|
670 |
* itself is already in the list.
|
671 |
*/
|
672 |
VIOsPAPRDevice *other = reg_conflict(dev); |
673 |
|
674 |
if (other) {
|
675 |
fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
|
676 |
object_get_typename(OBJECT(qdev)), |
677 |
object_get_typename(OBJECT(&other->qdev)), |
678 |
dev->reg); |
679 |
return -1; |
680 |
} |
681 |
} else {
|
682 |
/* Need to assign an address */
|
683 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
684 |
|
685 |
do {
|
686 |
dev->reg = bus->next_reg++; |
687 |
} while (reg_conflict(dev));
|
688 |
} |
689 |
|
690 |
/* Don't overwrite ids assigned on the command line */
|
691 |
if (!dev->qdev.id) {
|
692 |
id = vio_format_dev_name(dev); |
693 |
if (!id) {
|
694 |
return -1; |
695 |
} |
696 |
dev->qdev.id = id; |
697 |
} |
698 |
|
699 |
dev->qirq = spapr_allocate_msi(dev->vio_irq_num, &dev->vio_irq_num); |
700 |
if (!dev->qirq) {
|
701 |
return -1; |
702 |
} |
703 |
|
704 |
rtce_init(dev); |
705 |
|
706 |
return pc->init(dev);
|
707 |
} |
708 |
|
709 |
static target_ulong h_vio_signal(CPUPPCState *env, sPAPREnvironment *spapr,
|
710 |
target_ulong opcode, |
711 |
target_ulong *args) |
712 |
{ |
713 |
target_ulong reg = args[0];
|
714 |
target_ulong mode = args[1];
|
715 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
716 |
VIOsPAPRDeviceClass *pc; |
717 |
|
718 |
if (!dev) {
|
719 |
return H_PARAMETER;
|
720 |
} |
721 |
|
722 |
pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
723 |
|
724 |
if (mode & ~pc->signal_mask) {
|
725 |
return H_PARAMETER;
|
726 |
} |
727 |
|
728 |
dev->signal_state = mode; |
729 |
|
730 |
return H_SUCCESS;
|
731 |
} |
732 |
|
733 |
VIOsPAPRBus *spapr_vio_bus_init(void)
|
734 |
{ |
735 |
VIOsPAPRBus *bus; |
736 |
BusState *qbus; |
737 |
DeviceState *dev; |
738 |
|
739 |
/* Create bridge device */
|
740 |
dev = qdev_create(NULL, "spapr-vio-bridge"); |
741 |
qdev_init_nofail(dev); |
742 |
|
743 |
/* Create bus on bridge device */
|
744 |
|
745 |
qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio");
|
746 |
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
747 |
bus->next_reg = 0x1000;
|
748 |
|
749 |
/* hcall-vio */
|
750 |
spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
751 |
|
752 |
/* hcall-tce */
|
753 |
spapr_register_hypercall(H_PUT_TCE, h_put_tce); |
754 |
|
755 |
/* hcall-crq */
|
756 |
spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
757 |
spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
758 |
spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
759 |
spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
760 |
|
761 |
/* RTAS calls */
|
762 |
spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
|
763 |
spapr_rtas_register("quiesce", rtas_quiesce);
|
764 |
|
765 |
return bus;
|
766 |
} |
767 |
|
768 |
/* Represents sPAPR hcall VIO devices */
|
769 |
|
770 |
static int spapr_vio_bridge_init(SysBusDevice *dev) |
771 |
{ |
772 |
/* nothing */
|
773 |
return 0; |
774 |
} |
775 |
|
776 |
static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data) |
777 |
{ |
778 |
DeviceClass *dc = DEVICE_CLASS(klass); |
779 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
780 |
|
781 |
k->init = spapr_vio_bridge_init; |
782 |
dc->no_user = 1;
|
783 |
} |
784 |
|
785 |
static TypeInfo spapr_vio_bridge_info = {
|
786 |
.name = "spapr-vio-bridge",
|
787 |
.parent = TYPE_SYS_BUS_DEVICE, |
788 |
.instance_size = sizeof(SysBusDevice),
|
789 |
.class_init = spapr_vio_bridge_class_init, |
790 |
}; |
791 |
|
792 |
static void vio_spapr_device_class_init(ObjectClass *klass, void *data) |
793 |
{ |
794 |
DeviceClass *k = DEVICE_CLASS(klass); |
795 |
k->init = spapr_vio_busdev_init; |
796 |
k->reset = spapr_vio_busdev_reset; |
797 |
k->bus_info = &spapr_vio_bus_info; |
798 |
} |
799 |
|
800 |
static TypeInfo spapr_vio_type_info = {
|
801 |
.name = TYPE_VIO_SPAPR_DEVICE, |
802 |
.parent = TYPE_DEVICE, |
803 |
.instance_size = sizeof(VIOsPAPRDevice),
|
804 |
.abstract = true,
|
805 |
.class_size = sizeof(VIOsPAPRDeviceClass),
|
806 |
.class_init = vio_spapr_device_class_init, |
807 |
}; |
808 |
|
809 |
static void spapr_vio_register_types(void) |
810 |
{ |
811 |
type_register_static(&spapr_vio_bridge_info); |
812 |
type_register_static(&spapr_vio_type_info); |
813 |
} |
814 |
|
815 |
type_init(spapr_vio_register_types) |
816 |
|
817 |
#ifdef CONFIG_FDT
|
818 |
static int compare_reg(const void *p1, const void *p2) |
819 |
{ |
820 |
VIOsPAPRDevice const *dev1, *dev2;
|
821 |
|
822 |
dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1; |
823 |
dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2; |
824 |
|
825 |
if (dev1->reg < dev2->reg) {
|
826 |
return -1; |
827 |
} |
828 |
if (dev1->reg == dev2->reg) {
|
829 |
return 0; |
830 |
} |
831 |
|
832 |
/* dev1->reg > dev2->reg */
|
833 |
return 1; |
834 |
} |
835 |
|
836 |
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
837 |
{ |
838 |
DeviceState *qdev, **qdevs; |
839 |
int i, num, ret = 0; |
840 |
|
841 |
/* Count qdevs on the bus list */
|
842 |
num = 0;
|
843 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
844 |
num++; |
845 |
} |
846 |
|
847 |
/* Copy out into an array of pointers */
|
848 |
qdevs = g_malloc(sizeof(qdev) * num);
|
849 |
num = 0;
|
850 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
851 |
qdevs[num++] = qdev; |
852 |
} |
853 |
|
854 |
/* Sort the array */
|
855 |
qsort(qdevs, num, sizeof(qdev), compare_reg);
|
856 |
|
857 |
/* Hack alert. Give the devices to libfdt in reverse order, we happen
|
858 |
* to know that will mean they are in forward order in the tree. */
|
859 |
for (i = num - 1; i >= 0; i--) { |
860 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]); |
861 |
|
862 |
ret = vio_make_devnode(dev, fdt); |
863 |
|
864 |
if (ret < 0) { |
865 |
goto out;
|
866 |
} |
867 |
} |
868 |
|
869 |
ret = 0;
|
870 |
out:
|
871 |
free(qdevs); |
872 |
|
873 |
return ret;
|
874 |
} |
875 |
|
876 |
int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus) |
877 |
{ |
878 |
VIOsPAPRDevice *dev; |
879 |
char *name, *path;
|
880 |
int ret, offset;
|
881 |
|
882 |
dev = spapr_vty_get_default(bus); |
883 |
if (!dev)
|
884 |
return 0; |
885 |
|
886 |
offset = fdt_path_offset(fdt, "/chosen");
|
887 |
if (offset < 0) { |
888 |
return offset;
|
889 |
} |
890 |
|
891 |
name = vio_format_dev_name(dev); |
892 |
if (!name) {
|
893 |
return -ENOMEM;
|
894 |
} |
895 |
|
896 |
if (asprintf(&path, "/vdevice/%s", name) < 0) { |
897 |
path = NULL;
|
898 |
ret = -ENOMEM; |
899 |
goto out;
|
900 |
} |
901 |
|
902 |
ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
|
903 |
out:
|
904 |
free(name); |
905 |
free(path); |
906 |
|
907 |
return ret;
|
908 |
} |
909 |
#endif /* CONFIG_FDT */ |