e8ead7d579
We obviously don't want to print out an error message if addr points to
a valid register.
Reported-by: Coverity CID 1419391 Missing break in switch
Fixes: 9ae1329ee2 "ppc/pnv: Add models for POWER8 PHB3 PCIe Host bridge"
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <158153365202.3229002.11521084761048102466.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
360 lines
12 KiB
C
360 lines
12 KiB
C
/*
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* QEMU PowerPC PowerNV (POWER8) PHB3 model
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*
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* Copyright (c) 2014-2020, IBM Corporation.
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*
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* This code is licensed under the GPL version 2 or later. See the
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* COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu-common.h"
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#include "qemu/log.h"
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#include "target/ppc/cpu.h"
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#include "hw/ppc/fdt.h"
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#include "hw/pci-host/pnv_phb3_regs.h"
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#include "hw/pci-host/pnv_phb3.h"
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#include "hw/ppc/pnv.h"
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#include "hw/ppc/pnv_xscom.h"
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#include "hw/pci/pci_bridge.h"
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#include "hw/pci/pci_bus.h"
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#include <libfdt.h>
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#define phb3_pbcq_error(pbcq, fmt, ...) \
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qemu_log_mask(LOG_GUEST_ERROR, "phb3_pbcq[%d:%d]: " fmt "\n", \
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(pbcq)->phb->chip_id, (pbcq)->phb->phb_id, ## __VA_ARGS__)
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static uint64_t pnv_pbcq_nest_xscom_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(opaque);
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uint32_t offset = addr >> 3;
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return pbcq->nest_regs[offset];
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}
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static uint64_t pnv_pbcq_pci_xscom_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(opaque);
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uint32_t offset = addr >> 3;
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return pbcq->pci_regs[offset];
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}
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static uint64_t pnv_pbcq_spci_xscom_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(opaque);
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uint32_t offset = addr >> 3;
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if (offset == PBCQ_SPCI_ASB_DATA) {
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return pnv_phb3_reg_read(pbcq->phb,
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pbcq->spci_regs[PBCQ_SPCI_ASB_ADDR], 8);
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}
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return pbcq->spci_regs[offset];
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}
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static void pnv_pbcq_update_map(PnvPBCQState *pbcq)
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{
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uint64_t bar_en = pbcq->nest_regs[PBCQ_NEST_BAR_EN];
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uint64_t bar, mask, size;
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/*
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* NOTE: This will really not work well if those are remapped
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* after the PHB has created its sub regions. We could do better
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* if we had a way to resize regions but we don't really care
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* that much in practice as the stuff below really only happens
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* once early during boot
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*/
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/* Handle unmaps */
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if (memory_region_is_mapped(&pbcq->mmbar0) &&
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!(bar_en & PBCQ_NEST_BAR_EN_MMIO0)) {
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memory_region_del_subregion(get_system_memory(), &pbcq->mmbar0);
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}
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if (memory_region_is_mapped(&pbcq->mmbar1) &&
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!(bar_en & PBCQ_NEST_BAR_EN_MMIO1)) {
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memory_region_del_subregion(get_system_memory(), &pbcq->mmbar1);
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}
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if (memory_region_is_mapped(&pbcq->phbbar) &&
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!(bar_en & PBCQ_NEST_BAR_EN_PHB)) {
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memory_region_del_subregion(get_system_memory(), &pbcq->phbbar);
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}
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/* Update PHB */
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pnv_phb3_update_regions(pbcq->phb);
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/* Handle maps */
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if (!memory_region_is_mapped(&pbcq->mmbar0) &&
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(bar_en & PBCQ_NEST_BAR_EN_MMIO0)) {
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bar = pbcq->nest_regs[PBCQ_NEST_MMIO_BAR0] >> 14;
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mask = pbcq->nest_regs[PBCQ_NEST_MMIO_MASK0];
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size = ((~mask) >> 14) + 1;
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memory_region_init(&pbcq->mmbar0, OBJECT(pbcq), "pbcq-mmio0", size);
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memory_region_add_subregion(get_system_memory(), bar, &pbcq->mmbar0);
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pbcq->mmio0_base = bar;
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pbcq->mmio0_size = size;
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}
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if (!memory_region_is_mapped(&pbcq->mmbar1) &&
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(bar_en & PBCQ_NEST_BAR_EN_MMIO1)) {
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bar = pbcq->nest_regs[PBCQ_NEST_MMIO_BAR1] >> 14;
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mask = pbcq->nest_regs[PBCQ_NEST_MMIO_MASK1];
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size = ((~mask) >> 14) + 1;
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memory_region_init(&pbcq->mmbar1, OBJECT(pbcq), "pbcq-mmio1", size);
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memory_region_add_subregion(get_system_memory(), bar, &pbcq->mmbar1);
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pbcq->mmio1_base = bar;
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pbcq->mmio1_size = size;
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}
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if (!memory_region_is_mapped(&pbcq->phbbar)
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&& (bar_en & PBCQ_NEST_BAR_EN_PHB)) {
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bar = pbcq->nest_regs[PBCQ_NEST_PHB_BAR] >> 14;
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size = 0x1000;
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memory_region_init(&pbcq->phbbar, OBJECT(pbcq), "pbcq-phb", size);
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memory_region_add_subregion(get_system_memory(), bar, &pbcq->phbbar);
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}
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/* Update PHB */
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pnv_phb3_update_regions(pbcq->phb);
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}
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static void pnv_pbcq_nest_xscom_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(opaque);
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uint32_t reg = addr >> 3;
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switch (reg) {
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case PBCQ_NEST_MMIO_BAR0:
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case PBCQ_NEST_MMIO_BAR1:
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case PBCQ_NEST_MMIO_MASK0:
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case PBCQ_NEST_MMIO_MASK1:
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if (pbcq->nest_regs[PBCQ_NEST_BAR_EN] &
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(PBCQ_NEST_BAR_EN_MMIO0 |
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PBCQ_NEST_BAR_EN_MMIO1)) {
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phb3_pbcq_error(pbcq, "Changing enabled BAR unsupported");
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}
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pbcq->nest_regs[reg] = val & 0xffffffffc0000000ull;
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break;
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case PBCQ_NEST_PHB_BAR:
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if (pbcq->nest_regs[PBCQ_NEST_BAR_EN] & PBCQ_NEST_BAR_EN_PHB) {
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phb3_pbcq_error(pbcq, "Changing enabled BAR unsupported");
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}
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pbcq->nest_regs[reg] = val & 0xfffffffffc000000ull;
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break;
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case PBCQ_NEST_BAR_EN:
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pbcq->nest_regs[reg] = val & 0xf800000000000000ull;
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pnv_pbcq_update_map(pbcq);
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pnv_phb3_remap_irqs(pbcq->phb);
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break;
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case PBCQ_NEST_IRSN_COMPARE:
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case PBCQ_NEST_IRSN_MASK:
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pbcq->nest_regs[reg] = val & PBCQ_NEST_IRSN_COMP;
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pnv_phb3_remap_irqs(pbcq->phb);
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break;
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case PBCQ_NEST_LSI_SRC_ID:
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pbcq->nest_regs[reg] = val & PBCQ_NEST_LSI_SRC;
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pnv_phb3_remap_irqs(pbcq->phb);
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break;
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default:
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phb3_pbcq_error(pbcq, "%s @0x%"HWADDR_PRIx"=%"PRIx64, __func__,
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addr, val);
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}
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}
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static void pnv_pbcq_pci_xscom_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(opaque);
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uint32_t reg = addr >> 3;
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switch (reg) {
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case PBCQ_PCI_BAR2:
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pbcq->pci_regs[reg] = val & 0xfffffffffc000000ull;
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pnv_pbcq_update_map(pbcq);
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break;
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default:
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phb3_pbcq_error(pbcq, "%s @0x%"HWADDR_PRIx"=%"PRIx64, __func__,
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addr, val);
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}
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}
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static void pnv_pbcq_spci_xscom_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(opaque);
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uint32_t reg = addr >> 3;
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switch (reg) {
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case PBCQ_SPCI_ASB_ADDR:
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pbcq->spci_regs[reg] = val & 0xfff;
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break;
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case PBCQ_SPCI_ASB_STATUS:
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pbcq->spci_regs[reg] &= ~val;
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break;
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case PBCQ_SPCI_ASB_DATA:
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pnv_phb3_reg_write(pbcq->phb, pbcq->spci_regs[PBCQ_SPCI_ASB_ADDR],
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val, 8);
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break;
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case PBCQ_SPCI_AIB_CAPP_EN:
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case PBCQ_SPCI_CAPP_SEC_TMR:
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break;
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default:
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phb3_pbcq_error(pbcq, "%s @0x%"HWADDR_PRIx"=%"PRIx64, __func__,
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addr, val);
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}
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}
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static const MemoryRegionOps pnv_pbcq_nest_xscom_ops = {
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.read = pnv_pbcq_nest_xscom_read,
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.write = pnv_pbcq_nest_xscom_write,
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.valid.min_access_size = 8,
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.valid.max_access_size = 8,
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.impl.min_access_size = 8,
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.impl.max_access_size = 8,
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.endianness = DEVICE_BIG_ENDIAN,
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};
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static const MemoryRegionOps pnv_pbcq_pci_xscom_ops = {
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.read = pnv_pbcq_pci_xscom_read,
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.write = pnv_pbcq_pci_xscom_write,
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.valid.min_access_size = 8,
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.valid.max_access_size = 8,
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.impl.min_access_size = 8,
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.impl.max_access_size = 8,
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.endianness = DEVICE_BIG_ENDIAN,
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};
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static const MemoryRegionOps pnv_pbcq_spci_xscom_ops = {
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.read = pnv_pbcq_spci_xscom_read,
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.write = pnv_pbcq_spci_xscom_write,
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.valid.min_access_size = 8,
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.valid.max_access_size = 8,
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.impl.min_access_size = 8,
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.impl.max_access_size = 8,
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.endianness = DEVICE_BIG_ENDIAN,
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};
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static void pnv_pbcq_default_bars(PnvPBCQState *pbcq)
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{
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uint64_t mm0, mm1, reg;
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PnvPHB3 *phb = pbcq->phb;
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mm0 = 0x3d00000000000ull + 0x4000000000ull * phb->chip_id +
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0x1000000000ull * phb->phb_id;
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mm1 = 0x3ff8000000000ull + 0x0200000000ull * phb->chip_id +
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0x0080000000ull * phb->phb_id;
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reg = 0x3fffe40000000ull + 0x0000400000ull * phb->chip_id +
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0x0000100000ull * phb->phb_id;
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pbcq->nest_regs[PBCQ_NEST_MMIO_BAR0] = mm0 << 14;
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pbcq->nest_regs[PBCQ_NEST_MMIO_BAR1] = mm1 << 14;
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pbcq->nest_regs[PBCQ_NEST_PHB_BAR] = reg << 14;
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pbcq->nest_regs[PBCQ_NEST_MMIO_MASK0] = 0x3fff000000000ull << 14;
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pbcq->nest_regs[PBCQ_NEST_MMIO_MASK1] = 0x3ffff80000000ull << 14;
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pbcq->pci_regs[PBCQ_PCI_BAR2] = reg << 14;
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}
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static void pnv_pbcq_realize(DeviceState *dev, Error **errp)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(dev);
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PnvPHB3 *phb;
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char name[32];
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assert(pbcq->phb);
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phb = pbcq->phb;
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/* TODO: Fix OPAL to do that: establish default BAR values */
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pnv_pbcq_default_bars(pbcq);
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/* Initialize the XSCOM region for the PBCQ registers */
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snprintf(name, sizeof(name), "xscom-pbcq-nest-%d.%d",
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phb->chip_id, phb->phb_id);
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pnv_xscom_region_init(&pbcq->xscom_nest_regs, OBJECT(dev),
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&pnv_pbcq_nest_xscom_ops, pbcq, name,
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PNV_XSCOM_PBCQ_NEST_SIZE);
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snprintf(name, sizeof(name), "xscom-pbcq-pci-%d.%d",
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phb->chip_id, phb->phb_id);
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pnv_xscom_region_init(&pbcq->xscom_pci_regs, OBJECT(dev),
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&pnv_pbcq_pci_xscom_ops, pbcq, name,
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PNV_XSCOM_PBCQ_PCI_SIZE);
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snprintf(name, sizeof(name), "xscom-pbcq-spci-%d.%d",
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phb->chip_id, phb->phb_id);
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pnv_xscom_region_init(&pbcq->xscom_spci_regs, OBJECT(dev),
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&pnv_pbcq_spci_xscom_ops, pbcq, name,
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PNV_XSCOM_PBCQ_SPCI_SIZE);
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}
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static int pnv_pbcq_dt_xscom(PnvXScomInterface *dev, void *fdt,
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int xscom_offset)
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{
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const char compat[] = "ibm,power8-pbcq";
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PnvPHB3 *phb = PNV_PBCQ(dev)->phb;
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char *name;
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int offset;
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uint32_t lpc_pcba = PNV_XSCOM_PBCQ_NEST_BASE + 0x400 * phb->phb_id;
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uint32_t reg[] = {
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cpu_to_be32(lpc_pcba),
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cpu_to_be32(PNV_XSCOM_PBCQ_NEST_SIZE),
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cpu_to_be32(PNV_XSCOM_PBCQ_PCI_BASE + 0x400 * phb->phb_id),
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cpu_to_be32(PNV_XSCOM_PBCQ_PCI_SIZE),
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cpu_to_be32(PNV_XSCOM_PBCQ_SPCI_BASE + 0x040 * phb->phb_id),
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cpu_to_be32(PNV_XSCOM_PBCQ_SPCI_SIZE)
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};
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name = g_strdup_printf("pbcq@%x", lpc_pcba);
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offset = fdt_add_subnode(fdt, xscom_offset, name);
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_FDT(offset);
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g_free(name);
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_FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))));
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_FDT((fdt_setprop_cell(fdt, offset, "ibm,phb-index", phb->phb_id)));
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_FDT((fdt_setprop_cell(fdt, offset, "ibm,chip-id", phb->chip_id)));
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_FDT((fdt_setprop(fdt, offset, "compatible", compat,
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sizeof(compat))));
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return 0;
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}
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static void phb3_pbcq_instance_init(Object *obj)
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{
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PnvPBCQState *pbcq = PNV_PBCQ(obj);
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object_property_add_link(obj, "phb", TYPE_PNV_PHB3,
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(Object **)&pbcq->phb,
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object_property_allow_set_link,
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OBJ_PROP_LINK_STRONG,
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&error_abort);
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}
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static void pnv_pbcq_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
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xdc->dt_xscom = pnv_pbcq_dt_xscom;
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dc->realize = pnv_pbcq_realize;
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dc->user_creatable = false;
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}
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static const TypeInfo pnv_pbcq_type_info = {
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.name = TYPE_PNV_PBCQ,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(PnvPBCQState),
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.instance_init = phb3_pbcq_instance_init,
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.class_init = pnv_pbcq_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_PNV_XSCOM_INTERFACE },
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{ }
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}
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};
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static void pnv_pbcq_register_types(void)
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{
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type_register_static(&pnv_pbcq_type_info);
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}
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type_init(pnv_pbcq_register_types)
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