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qemu/hw/pci-host/pnv_phb4.c
Daniel Henrique Barboza b7c1750dc4 ppc/pnv: add phb-id/chip-id PnvPHB4RootBus properties 
The same rationale provided in the PHB3 bus case applies here.

Note: we could have merged both buses in a single object, like we did
with the root ports, and spare some boilerplate. The reason we opted to
preserve both buses objects is twofold:

- there's not user side advantage in doing so. Unifying the root ports
presents a clear user QOL change when we enable user created devices back.
The buses objects, aside from having a different QOM name, is transparent
to the user;

- we leave a door opened in case we want to increase the root port limit
for phb4/5 later on without having to deal with phb3 code.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-3-danielhb413@gmail.com>
2022-08-31 14:08:05 -03:00

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/*
* QEMU PowerPC PowerNV (POWER9) PHB4 model
*
* Copyright (c) 2018-2020, IBM Corporation.
*
* This code is licensed under the GPL version 2 or later. See the
* COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qapi/visitor.h"
#include "qapi/error.h"
#include "monitor/monitor.h"
#include "target/ppc/cpu.h"
#include "hw/pci-host/pnv_phb4_regs.h"
#include "hw/pci-host/pnv_phb4.h"
#include "hw/pci/pcie_host.h"
#include "hw/pci/pcie_port.h"
#include "hw/ppc/pnv.h"
#include "hw/ppc/pnv_xscom.h"
#include "hw/irq.h"
#include "hw/qdev-properties.h"
#include "qom/object.h"
#include "trace.h"
#define phb_error(phb, fmt, ...) \
qemu_log_mask(LOG_GUEST_ERROR, "phb4[%d:%d]: " fmt "\n", \
(phb)->chip_id, (phb)->phb_id, ## __VA_ARGS__)
#define phb_pec_error(pec, fmt, ...) \
qemu_log_mask(LOG_GUEST_ERROR, "phb4_pec[%d:%d]: " fmt "\n", \
(pec)->chip_id, (pec)->index, ## __VA_ARGS__)
static PCIDevice *pnv_phb4_find_cfg_dev(PnvPHB4 *phb)
{
PCIHostState *pci = PCI_HOST_BRIDGE(phb->phb_base);
uint64_t addr = phb->regs[PHB_CONFIG_ADDRESS >> 3];
uint8_t bus, devfn;
if (!(addr >> 63)) {
return NULL;
}
bus = (addr >> 52) & 0xff;
devfn = (addr >> 44) & 0xff;
/* We don't access the root complex this way */
if (bus == 0 && devfn == 0) {
return NULL;
}
return pci_find_device(pci->bus, bus, devfn);
}
/*
* The CONFIG_DATA register expects little endian accesses, but as the
* region is big endian, we have to swap the value.
*/
static void pnv_phb4_config_write(PnvPHB4 *phb, unsigned off,
unsigned size, uint64_t val)
{
uint32_t cfg_addr, limit;
PCIDevice *pdev;
pdev = pnv_phb4_find_cfg_dev(phb);
if (!pdev) {
return;
}
cfg_addr = (phb->regs[PHB_CONFIG_ADDRESS >> 3] >> 32) & 0xffc;
cfg_addr |= off;
limit = pci_config_size(pdev);
if (limit <= cfg_addr) {
/*
* conventional pci device can be behind pcie-to-pci bridge.
* 256 <= addr < 4K has no effects.
*/
return;
}
switch (size) {
case 1:
break;
case 2:
val = bswap16(val);
break;
case 4:
val = bswap32(val);
break;
default:
g_assert_not_reached();
}
pci_host_config_write_common(pdev, cfg_addr, limit, val, size);
}
static uint64_t pnv_phb4_config_read(PnvPHB4 *phb, unsigned off,
unsigned size)
{
uint32_t cfg_addr, limit;
PCIDevice *pdev;
uint64_t val;
pdev = pnv_phb4_find_cfg_dev(phb);
if (!pdev) {
return ~0ull;
}
cfg_addr = (phb->regs[PHB_CONFIG_ADDRESS >> 3] >> 32) & 0xffc;
cfg_addr |= off;
limit = pci_config_size(pdev);
if (limit <= cfg_addr) {
/*
* conventional pci device can be behind pcie-to-pci bridge.
* 256 <= addr < 4K has no effects.
*/
return ~0ull;
}
val = pci_host_config_read_common(pdev, cfg_addr, limit, size);
switch (size) {
case 1:
return val;
case 2:
return bswap16(val);
case 4:
return bswap32(val);
default:
g_assert_not_reached();
}
}
/*
* Root complex register accesses are memory mapped.
*/
static void pnv_phb4_rc_config_write(PnvPHB4 *phb, unsigned off,
unsigned size, uint64_t val)
{
PCIHostState *pci = PCI_HOST_BRIDGE(phb->phb_base);
PCIDevice *pdev;
if (size != 4) {
phb_error(phb, "rc_config_write invalid size %d\n", size);
return;
}
pdev = pci_find_device(pci->bus, 0, 0);
if (!pdev) {
phb_error(phb, "rc_config_write device not found\n");
return;
}
pci_host_config_write_common(pdev, off, PHB_RC_CONFIG_SIZE,
bswap32(val), 4);
}
static uint64_t pnv_phb4_rc_config_read(PnvPHB4 *phb, unsigned off,
unsigned size)
{
PCIHostState *pci = PCI_HOST_BRIDGE(phb->phb_base);
PCIDevice *pdev;
uint64_t val;
if (size != 4) {
phb_error(phb, "rc_config_read invalid size %d\n", size);
return ~0ull;
}
pdev = pci_find_device(pci->bus, 0, 0);
if (!pdev) {
phb_error(phb, "rc_config_read device not found\n");
return ~0ull;
}
val = pci_host_config_read_common(pdev, off, PHB_RC_CONFIG_SIZE, 4);
return bswap32(val);
}
static void pnv_phb4_check_mbt(PnvPHB4 *phb, uint32_t index)
{
uint64_t base, start, size, mbe0, mbe1;
MemoryRegion *parent;
char name[64];
/* Unmap first */
if (memory_region_is_mapped(&phb->mr_mmio[index])) {
/* Should we destroy it in RCU friendly way... ? */
memory_region_del_subregion(phb->mr_mmio[index].container,
&phb->mr_mmio[index]);
}
/* Get table entry */
mbe0 = phb->ioda_MBT[(index << 1)];
mbe1 = phb->ioda_MBT[(index << 1) + 1];
if (!(mbe0 & IODA3_MBT0_ENABLE)) {
return;
}
/* Grab geometry from registers */
base = GETFIELD(IODA3_MBT0_BASE_ADDR, mbe0) << 12;
size = GETFIELD(IODA3_MBT1_MASK, mbe1) << 12;
size |= 0xff00000000000000ull;
size = ~size + 1;
/* Calculate PCI side start address based on M32/M64 window type */
if (mbe0 & IODA3_MBT0_TYPE_M32) {
start = phb->regs[PHB_M32_START_ADDR >> 3];
if ((start + size) > 0x100000000ull) {
phb_error(phb, "M32 set beyond 4GB boundary !");
size = 0x100000000 - start;
}
} else {
start = base | (phb->regs[PHB_M64_UPPER_BITS >> 3]);
}
/* TODO: Figure out how to implemet/decode AOMASK */
/* Check if it matches an enabled MMIO region in the PEC stack */
if (memory_region_is_mapped(&phb->mmbar0) &&
base >= phb->mmio0_base &&
(base + size) <= (phb->mmio0_base + phb->mmio0_size)) {
parent = &phb->mmbar0;
base -= phb->mmio0_base;
} else if (memory_region_is_mapped(&phb->mmbar1) &&
base >= phb->mmio1_base &&
(base + size) <= (phb->mmio1_base + phb->mmio1_size)) {
parent = &phb->mmbar1;
base -= phb->mmio1_base;
} else {
phb_error(phb, "PHB MBAR %d out of parent bounds", index);
return;
}
/* Create alias (better name ?) */
snprintf(name, sizeof(name), "phb4-mbar%d", index);
memory_region_init_alias(&phb->mr_mmio[index], OBJECT(phb), name,
&phb->pci_mmio, start, size);
memory_region_add_subregion(parent, base, &phb->mr_mmio[index]);
}
static void pnv_phb4_check_all_mbt(PnvPHB4 *phb)
{
uint64_t i;
uint32_t num_windows = phb->big_phb ? PNV_PHB4_MAX_MMIO_WINDOWS :
PNV_PHB4_MIN_MMIO_WINDOWS;
for (i = 0; i < num_windows; i++) {
pnv_phb4_check_mbt(phb, i);
}
}
static uint64_t *pnv_phb4_ioda_access(PnvPHB4 *phb,
unsigned *out_table, unsigned *out_idx)
{
uint64_t adreg = phb->regs[PHB_IODA_ADDR >> 3];
unsigned int index = GETFIELD(PHB_IODA_AD_TADR, adreg);
unsigned int table = GETFIELD(PHB_IODA_AD_TSEL, adreg);
unsigned int mask;
uint64_t *tptr = NULL;
switch (table) {
case IODA3_TBL_LIST:
tptr = phb->ioda_LIST;
mask = 7;
break;
case IODA3_TBL_MIST:
tptr = phb->ioda_MIST;
mask = phb->big_phb ? PNV_PHB4_MAX_MIST : (PNV_PHB4_MAX_MIST >> 1);
mask -= 1;
break;
case IODA3_TBL_RCAM:
mask = phb->big_phb ? 127 : 63;
break;
case IODA3_TBL_MRT:
mask = phb->big_phb ? 15 : 7;
break;
case IODA3_TBL_PESTA:
case IODA3_TBL_PESTB:
mask = phb->big_phb ? PNV_PHB4_MAX_PEs : (PNV_PHB4_MAX_PEs >> 1);
mask -= 1;
break;
case IODA3_TBL_TVT:
tptr = phb->ioda_TVT;
mask = phb->big_phb ? PNV_PHB4_MAX_TVEs : (PNV_PHB4_MAX_TVEs >> 1);
mask -= 1;
break;
case IODA3_TBL_TCR:
case IODA3_TBL_TDR:
mask = phb->big_phb ? 1023 : 511;
break;
case IODA3_TBL_MBT:
tptr = phb->ioda_MBT;
mask = phb->big_phb ? PNV_PHB4_MAX_MBEs : (PNV_PHB4_MAX_MBEs >> 1);
mask -= 1;
break;
case IODA3_TBL_MDT:
tptr = phb->ioda_MDT;
mask = phb->big_phb ? PNV_PHB4_MAX_PEs : (PNV_PHB4_MAX_PEs >> 1);
mask -= 1;
break;
case IODA3_TBL_PEEV:
tptr = phb->ioda_PEEV;
mask = phb->big_phb ? PNV_PHB4_MAX_PEEVs : (PNV_PHB4_MAX_PEEVs >> 1);
mask -= 1;
break;
default:
phb_error(phb, "invalid IODA table %d", table);
return NULL;
}
index &= mask;
if (out_idx) {
*out_idx = index;
}
if (out_table) {
*out_table = table;
}
if (tptr) {
tptr += index;
}
if (adreg & PHB_IODA_AD_AUTOINC) {
index = (index + 1) & mask;
adreg = SETFIELD(PHB_IODA_AD_TADR, adreg, index);
}
phb->regs[PHB_IODA_ADDR >> 3] = adreg;
return tptr;
}
static uint64_t pnv_phb4_ioda_read(PnvPHB4 *phb)
{
unsigned table, idx;
uint64_t *tptr;
tptr = pnv_phb4_ioda_access(phb, &table, &idx);
if (!tptr) {
/* Special PESTA case */
if (table == IODA3_TBL_PESTA) {
return ((uint64_t)(phb->ioda_PEST_AB[idx] & 1)) << 63;
} else if (table == IODA3_TBL_PESTB) {
return ((uint64_t)(phb->ioda_PEST_AB[idx] & 2)) << 62;
}
/* Return 0 on unsupported tables, not ff's */
return 0;
}
return *tptr;
}
static void pnv_phb4_ioda_write(PnvPHB4 *phb, uint64_t val)
{
unsigned table, idx;
uint64_t *tptr;
tptr = pnv_phb4_ioda_access(phb, &table, &idx);
if (!tptr) {
/* Special PESTA case */
if (table == IODA3_TBL_PESTA) {
phb->ioda_PEST_AB[idx] &= ~1;
phb->ioda_PEST_AB[idx] |= (val >> 63) & 1;
} else if (table == IODA3_TBL_PESTB) {
phb->ioda_PEST_AB[idx] &= ~2;
phb->ioda_PEST_AB[idx] |= (val >> 62) & 2;
}
return;
}
/* Handle side effects */
switch (table) {
case IODA3_TBL_LIST:
break;
case IODA3_TBL_MIST: {
/* Special mask for MIST partial write */
uint64_t adreg = phb->regs[PHB_IODA_ADDR >> 3];
uint32_t mmask = GETFIELD(PHB_IODA_AD_MIST_PWV, adreg);
uint64_t v = *tptr;
if (mmask == 0) {
mmask = 0xf;
}
if (mmask & 8) {
v &= 0x0000ffffffffffffull;
v |= 0xcfff000000000000ull & val;
}
if (mmask & 4) {
v &= 0xffff0000ffffffffull;
v |= 0x0000cfff00000000ull & val;
}
if (mmask & 2) {
v &= 0xffffffff0000ffffull;
v |= 0x00000000cfff0000ull & val;
}
if (mmask & 1) {
v &= 0xffffffffffff0000ull;
v |= 0x000000000000cfffull & val;
}
*tptr = v;
break;
}
case IODA3_TBL_MBT:
*tptr = val;
/* Copy accross the valid bit to the other half */
phb->ioda_MBT[idx ^ 1] &= 0x7fffffffffffffffull;
phb->ioda_MBT[idx ^ 1] |= 0x8000000000000000ull & val;
/* Update mappings */
pnv_phb4_check_mbt(phb, idx >> 1);
break;
default:
*tptr = val;
}
}
static void pnv_phb4_rtc_invalidate(PnvPHB4 *phb, uint64_t val)
{
PnvPhb4DMASpace *ds;
/* Always invalidate all for now ... */
QLIST_FOREACH(ds, &phb->dma_spaces, list) {
ds->pe_num = PHB_INVALID_PE;
}
}
static void pnv_phb4_update_msi_regions(PnvPhb4DMASpace *ds)
{
uint64_t cfg = ds->phb->regs[PHB_PHB4_CONFIG >> 3];
if (cfg & PHB_PHB4C_32BIT_MSI_EN) {
if (!memory_region_is_mapped(MEMORY_REGION(&ds->msi32_mr))) {
memory_region_add_subregion(MEMORY_REGION(&ds->dma_mr),
0xffff0000, &ds->msi32_mr);
}
} else {
if (memory_region_is_mapped(MEMORY_REGION(&ds->msi32_mr))) {
memory_region_del_subregion(MEMORY_REGION(&ds->dma_mr),
&ds->msi32_mr);
}
}
if (cfg & PHB_PHB4C_64BIT_MSI_EN) {
if (!memory_region_is_mapped(MEMORY_REGION(&ds->msi64_mr))) {
memory_region_add_subregion(MEMORY_REGION(&ds->dma_mr),
(1ull << 60), &ds->msi64_mr);
}
} else {
if (memory_region_is_mapped(MEMORY_REGION(&ds->msi64_mr))) {
memory_region_del_subregion(MEMORY_REGION(&ds->dma_mr),
&ds->msi64_mr);
}
}
}
static void pnv_phb4_update_all_msi_regions(PnvPHB4 *phb)
{
PnvPhb4DMASpace *ds;
QLIST_FOREACH(ds, &phb->dma_spaces, list) {
pnv_phb4_update_msi_regions(ds);
}
}
static void pnv_phb4_update_xsrc(PnvPHB4 *phb)
{
int shift, flags, i, lsi_base;
XiveSource *xsrc = &phb->xsrc;
/* The XIVE source characteristics can be set at run time */
if (phb->regs[PHB_CTRLR >> 3] & PHB_CTRLR_IRQ_PGSZ_64K) {
shift = XIVE_ESB_64K;
} else {
shift = XIVE_ESB_4K;
}
if (phb->regs[PHB_CTRLR >> 3] & PHB_CTRLR_IRQ_STORE_EOI) {
flags = XIVE_SRC_STORE_EOI;
} else {
flags = 0;
}
/*
* When the PQ disable configuration bit is set, the check on the
* PQ state bits is disabled on the PHB side (for MSI only) and it
* is performed on the IC side instead.
*/
if (phb->regs[PHB_CTRLR >> 3] & PHB_CTRLR_IRQ_PQ_DISABLE) {
flags |= XIVE_SRC_PQ_DISABLE;
}
phb->xsrc.esb_shift = shift;
phb->xsrc.esb_flags = flags;
lsi_base = GETFIELD(PHB_LSI_SRC_ID, phb->regs[PHB_LSI_SOURCE_ID >> 3]);
lsi_base <<= 3;
/* TODO: handle reset values of PHB_LSI_SRC_ID */
if (!lsi_base) {
return;
}
/* TODO: need a xive_source_irq_reset_lsi() */
bitmap_zero(xsrc->lsi_map, xsrc->nr_irqs);
for (i = 0; i < xsrc->nr_irqs; i++) {
bool msi = (i < lsi_base || i >= (lsi_base + 8));
if (!msi) {
xive_source_irq_set_lsi(xsrc, i);
}
}
}
static void pnv_phb4_reg_write(void *opaque, hwaddr off, uint64_t val,
unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
bool changed;
/* Special case outbound configuration data */
if ((off & 0xfffc) == PHB_CONFIG_DATA) {
pnv_phb4_config_write(phb, off & 0x3, size, val);
return;
}
/* Special case RC configuration space */
if ((off & 0xf800) == PHB_RC_CONFIG_BASE) {
pnv_phb4_rc_config_write(phb, off & 0x7ff, size, val);
return;
}
/* Other registers are 64-bit only */
if (size != 8 || off & 0x7) {
phb_error(phb, "Invalid register access, offset: 0x%"PRIx64" size: %d",
off, size);
return;
}
/* Handle masking */
switch (off) {
case PHB_LSI_SOURCE_ID:
val &= PHB_LSI_SRC_ID;
break;
case PHB_M64_UPPER_BITS:
val &= 0xff00000000000000ull;
break;
/* TCE Kill */
case PHB_TCE_KILL:
/* Clear top 3 bits which HW does to indicate successful queuing */
val &= ~(PHB_TCE_KILL_ALL | PHB_TCE_KILL_PE | PHB_TCE_KILL_ONE);
break;
case PHB_Q_DMA_R:
/*
* This is enough logic to make SW happy but we aren't
* actually quiescing the DMAs
*/
if (val & PHB_Q_DMA_R_AUTORESET) {
val = 0;
} else {
val &= PHB_Q_DMA_R_QUIESCE_DMA;
}
break;
/* LEM stuff */
case PHB_LEM_FIR_AND_MASK:
phb->regs[PHB_LEM_FIR_ACCUM >> 3] &= val;
return;
case PHB_LEM_FIR_OR_MASK:
phb->regs[PHB_LEM_FIR_ACCUM >> 3] |= val;
return;
case PHB_LEM_ERROR_AND_MASK:
phb->regs[PHB_LEM_ERROR_MASK >> 3] &= val;
return;
case PHB_LEM_ERROR_OR_MASK:
phb->regs[PHB_LEM_ERROR_MASK >> 3] |= val;
return;
case PHB_LEM_WOF:
val = 0;
break;
/* TODO: More regs ..., maybe create a table with masks... */
/* Read only registers */
case PHB_CPU_LOADSTORE_STATUS:
case PHB_ETU_ERR_SUMMARY:
case PHB_PHB4_GEN_CAP:
case PHB_PHB4_TCE_CAP:
case PHB_PHB4_IRQ_CAP:
case PHB_PHB4_EEH_CAP:
return;
}
/* Record whether it changed */
changed = phb->regs[off >> 3] != val;
/* Store in register cache first */
phb->regs[off >> 3] = val;
/* Handle side effects */
switch (off) {
case PHB_PHB4_CONFIG:
if (changed) {
pnv_phb4_update_all_msi_regions(phb);
}
break;
case PHB_M32_START_ADDR:
case PHB_M64_UPPER_BITS:
if (changed) {
pnv_phb4_check_all_mbt(phb);
}
break;
/* IODA table accesses */
case PHB_IODA_DATA0:
pnv_phb4_ioda_write(phb, val);
break;
/* RTC invalidation */
case PHB_RTC_INVALIDATE:
pnv_phb4_rtc_invalidate(phb, val);
break;
/* PHB Control (Affects XIVE source) */
case PHB_CTRLR:
case PHB_LSI_SOURCE_ID:
pnv_phb4_update_xsrc(phb);
break;
/* Silent simple writes */
case PHB_ASN_CMPM:
case PHB_CONFIG_ADDRESS:
case PHB_IODA_ADDR:
case PHB_TCE_KILL:
case PHB_TCE_SPEC_CTL:
case PHB_PEST_BAR:
case PHB_PELTV_BAR:
case PHB_RTT_BAR:
case PHB_LEM_FIR_ACCUM:
case PHB_LEM_ERROR_MASK:
case PHB_LEM_ACTION0:
case PHB_LEM_ACTION1:
case PHB_TCE_TAG_ENABLE:
case PHB_INT_NOTIFY_ADDR:
case PHB_INT_NOTIFY_INDEX:
case PHB_DMARD_SYNC:
break;
/* Noise on anything else */
default:
qemu_log_mask(LOG_UNIMP, "phb4: reg_write 0x%"PRIx64"=%"PRIx64"\n",
off, val);
}
}
static uint64_t pnv_phb4_reg_read(void *opaque, hwaddr off, unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint64_t val;
if ((off & 0xfffc) == PHB_CONFIG_DATA) {
return pnv_phb4_config_read(phb, off & 0x3, size);
}
/* Special case RC configuration space */
if ((off & 0xf800) == PHB_RC_CONFIG_BASE) {
return pnv_phb4_rc_config_read(phb, off & 0x7ff, size);
}
/* Other registers are 64-bit only */
if (size != 8 || off & 0x7) {
phb_error(phb, "Invalid register access, offset: 0x%"PRIx64" size: %d",
off, size);
return ~0ull;
}
/* Default read from cache */
val = phb->regs[off >> 3];
switch (off) {
case PHB_VERSION:
return PNV_PHB4_PEC_GET_CLASS(phb->pec)->version;
/* Read-only */
case PHB_PHB4_GEN_CAP:
return 0xe4b8000000000000ull;
case PHB_PHB4_TCE_CAP:
return phb->big_phb ? 0x4008440000000400ull : 0x2008440000000200ull;
case PHB_PHB4_IRQ_CAP:
return phb->big_phb ? 0x0800000000001000ull : 0x0800000000000800ull;
case PHB_PHB4_EEH_CAP:
return phb->big_phb ? 0x2000000000000000ull : 0x1000000000000000ull;
/* IODA table accesses */
case PHB_IODA_DATA0:
return pnv_phb4_ioda_read(phb);
/* Link training always appears trained */
case PHB_PCIE_DLP_TRAIN_CTL:
/* TODO: Do something sensible with speed ? */
return PHB_PCIE_DLP_INBAND_PRESENCE | PHB_PCIE_DLP_TL_LINKACT;
/* DMA read sync: make it look like it's complete */
case PHB_DMARD_SYNC:
return PHB_DMARD_SYNC_COMPLETE;
/* Silent simple reads */
case PHB_LSI_SOURCE_ID:
case PHB_CPU_LOADSTORE_STATUS:
case PHB_ASN_CMPM:
case PHB_PHB4_CONFIG:
case PHB_M32_START_ADDR:
case PHB_CONFIG_ADDRESS:
case PHB_IODA_ADDR:
case PHB_RTC_INVALIDATE:
case PHB_TCE_KILL:
case PHB_TCE_SPEC_CTL:
case PHB_PEST_BAR:
case PHB_PELTV_BAR:
case PHB_RTT_BAR:
case PHB_M64_UPPER_BITS:
case PHB_CTRLR:
case PHB_LEM_FIR_ACCUM:
case PHB_LEM_ERROR_MASK:
case PHB_LEM_ACTION0:
case PHB_LEM_ACTION1:
case PHB_TCE_TAG_ENABLE:
case PHB_INT_NOTIFY_ADDR:
case PHB_INT_NOTIFY_INDEX:
case PHB_Q_DMA_R:
case PHB_ETU_ERR_SUMMARY:
break;
/* Noise on anything else */
default:
qemu_log_mask(LOG_UNIMP, "phb4: reg_read 0x%"PRIx64"=%"PRIx64"\n",
off, val);
}
return val;
}
static const MemoryRegionOps pnv_phb4_reg_ops = {
.read = pnv_phb4_reg_read,
.write = pnv_phb4_reg_write,
.valid.min_access_size = 1,
.valid.max_access_size = 8,
.impl.min_access_size = 1,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static uint64_t pnv_phb4_xscom_read(void *opaque, hwaddr addr, unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint32_t reg = addr >> 3;
uint64_t val;
hwaddr offset;
switch (reg) {
case PHB_SCOM_HV_IND_ADDR:
return phb->scom_hv_ind_addr_reg;
case PHB_SCOM_HV_IND_DATA:
if (!(phb->scom_hv_ind_addr_reg & PHB_SCOM_HV_IND_ADDR_VALID)) {
phb_error(phb, "Invalid indirect address");
return ~0ull;
}
size = (phb->scom_hv_ind_addr_reg & PHB_SCOM_HV_IND_ADDR_4B) ? 4 : 8;
offset = GETFIELD(PHB_SCOM_HV_IND_ADDR_ADDR, phb->scom_hv_ind_addr_reg);
val = pnv_phb4_reg_read(phb, offset, size);
if (phb->scom_hv_ind_addr_reg & PHB_SCOM_HV_IND_ADDR_AUTOINC) {
offset += size;
offset &= 0x3fff;
phb->scom_hv_ind_addr_reg = SETFIELD(PHB_SCOM_HV_IND_ADDR_ADDR,
phb->scom_hv_ind_addr_reg,
offset);
}
return val;
case PHB_SCOM_ETU_LEM_FIR:
case PHB_SCOM_ETU_LEM_FIR_AND:
case PHB_SCOM_ETU_LEM_FIR_OR:
case PHB_SCOM_ETU_LEM_FIR_MSK:
case PHB_SCOM_ETU_LEM_ERR_MSK_AND:
case PHB_SCOM_ETU_LEM_ERR_MSK_OR:
case PHB_SCOM_ETU_LEM_ACT0:
case PHB_SCOM_ETU_LEM_ACT1:
case PHB_SCOM_ETU_LEM_WOF:
offset = ((reg - PHB_SCOM_ETU_LEM_FIR) << 3) + PHB_LEM_FIR_ACCUM;
return pnv_phb4_reg_read(phb, offset, size);
case PHB_SCOM_ETU_PMON_CONFIG:
case PHB_SCOM_ETU_PMON_CTR0:
case PHB_SCOM_ETU_PMON_CTR1:
case PHB_SCOM_ETU_PMON_CTR2:
case PHB_SCOM_ETU_PMON_CTR3:
offset = ((reg - PHB_SCOM_ETU_PMON_CONFIG) << 3) + PHB_PERFMON_CONFIG;
return pnv_phb4_reg_read(phb, offset, size);
default:
qemu_log_mask(LOG_UNIMP, "phb4: xscom_read 0x%"HWADDR_PRIx"\n", addr);
return ~0ull;
}
}
static void pnv_phb4_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint32_t reg = addr >> 3;
hwaddr offset;
switch (reg) {
case PHB_SCOM_HV_IND_ADDR:
phb->scom_hv_ind_addr_reg = val & 0xe000000000001fff;
break;
case PHB_SCOM_HV_IND_DATA:
if (!(phb->scom_hv_ind_addr_reg & PHB_SCOM_HV_IND_ADDR_VALID)) {
phb_error(phb, "Invalid indirect address");
break;
}
size = (phb->scom_hv_ind_addr_reg & PHB_SCOM_HV_IND_ADDR_4B) ? 4 : 8;
offset = GETFIELD(PHB_SCOM_HV_IND_ADDR_ADDR, phb->scom_hv_ind_addr_reg);
pnv_phb4_reg_write(phb, offset, val, size);
if (phb->scom_hv_ind_addr_reg & PHB_SCOM_HV_IND_ADDR_AUTOINC) {
offset += size;
offset &= 0x3fff;
phb->scom_hv_ind_addr_reg = SETFIELD(PHB_SCOM_HV_IND_ADDR_ADDR,
phb->scom_hv_ind_addr_reg,
offset);
}
break;
case PHB_SCOM_ETU_LEM_FIR:
case PHB_SCOM_ETU_LEM_FIR_AND:
case PHB_SCOM_ETU_LEM_FIR_OR:
case PHB_SCOM_ETU_LEM_FIR_MSK:
case PHB_SCOM_ETU_LEM_ERR_MSK_AND:
case PHB_SCOM_ETU_LEM_ERR_MSK_OR:
case PHB_SCOM_ETU_LEM_ACT0:
case PHB_SCOM_ETU_LEM_ACT1:
case PHB_SCOM_ETU_LEM_WOF:
offset = ((reg - PHB_SCOM_ETU_LEM_FIR) << 3) + PHB_LEM_FIR_ACCUM;
pnv_phb4_reg_write(phb, offset, val, size);
break;
case PHB_SCOM_ETU_PMON_CONFIG:
case PHB_SCOM_ETU_PMON_CTR0:
case PHB_SCOM_ETU_PMON_CTR1:
case PHB_SCOM_ETU_PMON_CTR2:
case PHB_SCOM_ETU_PMON_CTR3:
offset = ((reg - PHB_SCOM_ETU_PMON_CONFIG) << 3) + PHB_PERFMON_CONFIG;
pnv_phb4_reg_write(phb, offset, val, size);
break;
default:
qemu_log_mask(LOG_UNIMP, "phb4: xscom_write 0x%"HWADDR_PRIx
"=%"PRIx64"\n", addr, val);
}
}
const MemoryRegionOps pnv_phb4_xscom_ops = {
.read = pnv_phb4_xscom_read,
.write = pnv_phb4_xscom_write,
.valid.min_access_size = 8,
.valid.max_access_size = 8,
.impl.min_access_size = 8,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static uint64_t pnv_pec_stk_nest_xscom_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint32_t reg = addr >> 3;
/* TODO: add list of allowed registers and error out if not */
return phb->nest_regs[reg];
}
/*
* Return the 'stack_no' of a PHB4. 'stack_no' is the order
* the PHB4 occupies in the PEC. This is the reverse of what
* pnv_phb4_pec_get_phb_id() does.
*
* E.g. a phb with phb_id = 4 and pec->index = 1 (PEC1) will
* be the second phb (stack_no = 1) of the PEC.
*/
static int pnv_phb4_get_phb_stack_no(PnvPHB4 *phb)
{
PnvPhb4PecState *pec = phb->pec;
PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
int index = pec->index;
int stack_no = phb->phb_id;
while (index--) {
stack_no -= pecc->num_phbs[index];
}
return stack_no;
}
static void pnv_phb4_update_regions(PnvPHB4 *phb)
{
/* Unmap first always */
if (memory_region_is_mapped(&phb->mr_regs)) {
memory_region_del_subregion(&phb->phbbar, &phb->mr_regs);
}
if (memory_region_is_mapped(&phb->xsrc.esb_mmio)) {
memory_region_del_subregion(&phb->intbar, &phb->xsrc.esb_mmio);
}
/* Map registers if enabled */
if (memory_region_is_mapped(&phb->phbbar)) {
memory_region_add_subregion(&phb->phbbar, 0, &phb->mr_regs);
}
/* Map ESB if enabled */
if (memory_region_is_mapped(&phb->intbar)) {
memory_region_add_subregion(&phb->intbar, 0, &phb->xsrc.esb_mmio);
}
/* Check/update m32 */
pnv_phb4_check_all_mbt(phb);
}
static void pnv_pec_phb_update_map(PnvPHB4 *phb)
{
PnvPhb4PecState *pec = phb->pec;
MemoryRegion *sysmem = get_system_memory();
uint64_t bar_en = phb->nest_regs[PEC_NEST_STK_BAR_EN];
int stack_no = pnv_phb4_get_phb_stack_no(phb);
uint64_t bar, mask, size;
char name[64];
/*
* NOTE: This will really not work well if those are remapped
* after the PHB has created its sub regions. We could do better
* if we had a way to resize regions but we don't really care
* that much in practice as the stuff below really only happens
* once early during boot
*/
/* Handle unmaps */
if (memory_region_is_mapped(&phb->mmbar0) &&
!(bar_en & PEC_NEST_STK_BAR_EN_MMIO0)) {
memory_region_del_subregion(sysmem, &phb->mmbar0);
}
if (memory_region_is_mapped(&phb->mmbar1) &&
!(bar_en & PEC_NEST_STK_BAR_EN_MMIO1)) {
memory_region_del_subregion(sysmem, &phb->mmbar1);
}
if (memory_region_is_mapped(&phb->phbbar) &&
!(bar_en & PEC_NEST_STK_BAR_EN_PHB)) {
memory_region_del_subregion(sysmem, &phb->phbbar);
}
if (memory_region_is_mapped(&phb->intbar) &&
!(bar_en & PEC_NEST_STK_BAR_EN_INT)) {
memory_region_del_subregion(sysmem, &phb->intbar);
}
/* Update PHB */
pnv_phb4_update_regions(phb);
/* Handle maps */
if (!memory_region_is_mapped(&phb->mmbar0) &&
(bar_en & PEC_NEST_STK_BAR_EN_MMIO0)) {
bar = phb->nest_regs[PEC_NEST_STK_MMIO_BAR0] >> 8;
mask = phb->nest_regs[PEC_NEST_STK_MMIO_BAR0_MASK];
size = ((~mask) >> 8) + 1;
snprintf(name, sizeof(name), "pec-%d.%d-phb-%d-mmio0",
pec->chip_id, pec->index, stack_no);
memory_region_init(&phb->mmbar0, OBJECT(phb), name, size);
memory_region_add_subregion(sysmem, bar, &phb->mmbar0);
phb->mmio0_base = bar;
phb->mmio0_size = size;
}
if (!memory_region_is_mapped(&phb->mmbar1) &&
(bar_en & PEC_NEST_STK_BAR_EN_MMIO1)) {
bar = phb->nest_regs[PEC_NEST_STK_MMIO_BAR1] >> 8;
mask = phb->nest_regs[PEC_NEST_STK_MMIO_BAR1_MASK];
size = ((~mask) >> 8) + 1;
snprintf(name, sizeof(name), "pec-%d.%d-phb-%d-mmio1",
pec->chip_id, pec->index, stack_no);
memory_region_init(&phb->mmbar1, OBJECT(phb), name, size);
memory_region_add_subregion(sysmem, bar, &phb->mmbar1);
phb->mmio1_base = bar;
phb->mmio1_size = size;
}
if (!memory_region_is_mapped(&phb->phbbar) &&
(bar_en & PEC_NEST_STK_BAR_EN_PHB)) {
bar = phb->nest_regs[PEC_NEST_STK_PHB_REGS_BAR] >> 8;
size = PNV_PHB4_NUM_REGS << 3;
snprintf(name, sizeof(name), "pec-%d.%d-phb-%d",
pec->chip_id, pec->index, stack_no);
memory_region_init(&phb->phbbar, OBJECT(phb), name, size);
memory_region_add_subregion(sysmem, bar, &phb->phbbar);
}
if (!memory_region_is_mapped(&phb->intbar) &&
(bar_en & PEC_NEST_STK_BAR_EN_INT)) {
bar = phb->nest_regs[PEC_NEST_STK_INT_BAR] >> 8;
size = PNV_PHB4_MAX_INTs << 16;
snprintf(name, sizeof(name), "pec-%d.%d-phb-%d-int",
phb->pec->chip_id, phb->pec->index, stack_no);
memory_region_init(&phb->intbar, OBJECT(phb), name, size);
memory_region_add_subregion(sysmem, bar, &phb->intbar);
}
/* Update PHB */
pnv_phb4_update_regions(phb);
}
static void pnv_pec_stk_nest_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
PnvPhb4PecState *pec = phb->pec;
uint32_t reg = addr >> 3;
switch (reg) {
case PEC_NEST_STK_PCI_NEST_FIR:
phb->nest_regs[PEC_NEST_STK_PCI_NEST_FIR] = val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_CLR:
phb->nest_regs[PEC_NEST_STK_PCI_NEST_FIR] &= val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_SET:
phb->nest_regs[PEC_NEST_STK_PCI_NEST_FIR] |= val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_MSK:
phb->nest_regs[PEC_NEST_STK_PCI_NEST_FIR_MSK] = val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_MSKC:
phb->nest_regs[PEC_NEST_STK_PCI_NEST_FIR_MSK] &= val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_MSKS:
phb->nest_regs[PEC_NEST_STK_PCI_NEST_FIR_MSK] |= val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_ACT0:
case PEC_NEST_STK_PCI_NEST_FIR_ACT1:
phb->nest_regs[reg] = val;
break;
case PEC_NEST_STK_PCI_NEST_FIR_WOF:
phb->nest_regs[reg] = 0;
break;
case PEC_NEST_STK_ERR_REPORT_0:
case PEC_NEST_STK_ERR_REPORT_1:
case PEC_NEST_STK_PBCQ_GNRL_STATUS:
/* Flag error ? */
break;
case PEC_NEST_STK_PBCQ_MODE:
phb->nest_regs[reg] = val & 0xff00000000000000ull;
break;
case PEC_NEST_STK_MMIO_BAR0:
case PEC_NEST_STK_MMIO_BAR0_MASK:
case PEC_NEST_STK_MMIO_BAR1:
case PEC_NEST_STK_MMIO_BAR1_MASK:
if (phb->nest_regs[PEC_NEST_STK_BAR_EN] &
(PEC_NEST_STK_BAR_EN_MMIO0 |
PEC_NEST_STK_BAR_EN_MMIO1)) {
phb_pec_error(pec, "Changing enabled BAR unsupported\n");
}
phb->nest_regs[reg] = val & 0xffffffffff000000ull;
break;
case PEC_NEST_STK_PHB_REGS_BAR:
if (phb->nest_regs[PEC_NEST_STK_BAR_EN] & PEC_NEST_STK_BAR_EN_PHB) {
phb_pec_error(pec, "Changing enabled BAR unsupported\n");
}
phb->nest_regs[reg] = val & 0xffffffffffc00000ull;
break;
case PEC_NEST_STK_INT_BAR:
if (phb->nest_regs[PEC_NEST_STK_BAR_EN] & PEC_NEST_STK_BAR_EN_INT) {
phb_pec_error(pec, "Changing enabled BAR unsupported\n");
}
phb->nest_regs[reg] = val & 0xfffffff000000000ull;
break;
case PEC_NEST_STK_BAR_EN:
phb->nest_regs[reg] = val & 0xf000000000000000ull;
pnv_pec_phb_update_map(phb);
break;
case PEC_NEST_STK_DATA_FRZ_TYPE:
case PEC_NEST_STK_PBCQ_TUN_BAR:
/* Not used for now */
phb->nest_regs[reg] = val;
break;
default:
qemu_log_mask(LOG_UNIMP, "phb4_pec: nest_xscom_write 0x%"HWADDR_PRIx
"=%"PRIx64"\n", addr, val);
}
}
static const MemoryRegionOps pnv_pec_stk_nest_xscom_ops = {
.read = pnv_pec_stk_nest_xscom_read,
.write = pnv_pec_stk_nest_xscom_write,
.valid.min_access_size = 8,
.valid.max_access_size = 8,
.impl.min_access_size = 8,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static uint64_t pnv_pec_stk_pci_xscom_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint32_t reg = addr >> 3;
/* TODO: add list of allowed registers and error out if not */
return phb->pci_regs[reg];
}
static void pnv_pec_stk_pci_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint32_t reg = addr >> 3;
switch (reg) {
case PEC_PCI_STK_PCI_FIR:
phb->pci_regs[reg] = val;
break;
case PEC_PCI_STK_PCI_FIR_CLR:
phb->pci_regs[PEC_PCI_STK_PCI_FIR] &= val;
break;
case PEC_PCI_STK_PCI_FIR_SET:
phb->pci_regs[PEC_PCI_STK_PCI_FIR] |= val;
break;
case PEC_PCI_STK_PCI_FIR_MSK:
phb->pci_regs[reg] = val;
break;
case PEC_PCI_STK_PCI_FIR_MSKC:
phb->pci_regs[PEC_PCI_STK_PCI_FIR_MSK] &= val;
break;
case PEC_PCI_STK_PCI_FIR_MSKS:
phb->pci_regs[PEC_PCI_STK_PCI_FIR_MSK] |= val;
break;
case PEC_PCI_STK_PCI_FIR_ACT0:
case PEC_PCI_STK_PCI_FIR_ACT1:
phb->pci_regs[reg] = val;
break;
case PEC_PCI_STK_PCI_FIR_WOF:
phb->pci_regs[reg] = 0;
break;
case PEC_PCI_STK_ETU_RESET:
phb->pci_regs[reg] = val & 0x8000000000000000ull;
/* TODO: Implement reset */
break;
case PEC_PCI_STK_PBAIB_ERR_REPORT:
break;
case PEC_PCI_STK_PBAIB_TX_CMD_CRED:
case PEC_PCI_STK_PBAIB_TX_DAT_CRED:
phb->pci_regs[reg] = val;
break;
default:
qemu_log_mask(LOG_UNIMP, "phb4_pec_stk: pci_xscom_write 0x%"HWADDR_PRIx
"=%"PRIx64"\n", addr, val);
}
}
static const MemoryRegionOps pnv_pec_stk_pci_xscom_ops = {
.read = pnv_pec_stk_pci_xscom_read,
.write = pnv_pec_stk_pci_xscom_write,
.valid.min_access_size = 8,
.valid.max_access_size = 8,
.impl.min_access_size = 8,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static int pnv_phb4_map_irq(PCIDevice *pci_dev, int irq_num)
{
/* Check that out properly ... */
return irq_num & 3;
}
static void pnv_phb4_set_irq(void *opaque, int irq_num, int level)
{
PnvPHB4 *phb = PNV_PHB4(opaque);
uint32_t lsi_base;
/* LSI only ... */
if (irq_num > 3) {
phb_error(phb, "IRQ %x is not an LSI", irq_num);
}
lsi_base = GETFIELD(PHB_LSI_SRC_ID, phb->regs[PHB_LSI_SOURCE_ID >> 3]);
lsi_base <<= 3;
qemu_set_irq(phb->qirqs[lsi_base + irq_num], level);
}
static bool pnv_phb4_resolve_pe(PnvPhb4DMASpace *ds)
{
uint64_t rtt, addr;
uint16_t rte;
int bus_num;
int num_PEs;
/* Already resolved ? */
if (ds->pe_num != PHB_INVALID_PE) {
return true;
}
/* We need to lookup the RTT */
rtt = ds->phb->regs[PHB_RTT_BAR >> 3];
if (!(rtt & PHB_RTT_BAR_ENABLE)) {
phb_error(ds->phb, "DMA with RTT BAR disabled !");
/* Set error bits ? fence ? ... */
return false;
}
/* Read RTE */
bus_num = pci_bus_num(ds->bus);
addr = rtt & PHB_RTT_BASE_ADDRESS_MASK;
addr += 2 * PCI_BUILD_BDF(bus_num, ds->devfn);
if (dma_memory_read(&address_space_memory, addr, &rte,
sizeof(rte), MEMTXATTRS_UNSPECIFIED)) {
phb_error(ds->phb, "Failed to read RTT entry at 0x%"PRIx64, addr);
/* Set error bits ? fence ? ... */
return false;
}
rte = be16_to_cpu(rte);
/* Fail upon reading of invalid PE# */
num_PEs = ds->phb->big_phb ? PNV_PHB4_MAX_PEs : (PNV_PHB4_MAX_PEs >> 1);
if (rte >= num_PEs) {
phb_error(ds->phb, "RTE for RID 0x%x invalid (%04x", ds->devfn, rte);
rte &= num_PEs - 1;
}
ds->pe_num = rte;
return true;
}
static void pnv_phb4_translate_tve(PnvPhb4DMASpace *ds, hwaddr addr,
bool is_write, uint64_t tve,
IOMMUTLBEntry *tlb)
{
uint64_t tta = GETFIELD(IODA3_TVT_TABLE_ADDR, tve);
int32_t lev = GETFIELD(IODA3_TVT_NUM_LEVELS, tve);
uint32_t tts = GETFIELD(IODA3_TVT_TCE_TABLE_SIZE, tve);
uint32_t tps = GETFIELD(IODA3_TVT_IO_PSIZE, tve);
/* Invalid levels */
if (lev > 4) {
phb_error(ds->phb, "Invalid #levels in TVE %d", lev);
return;
}
/* Invalid entry */
if (tts == 0) {
phb_error(ds->phb, "Access to invalid TVE");
return;
}
/* IO Page Size of 0 means untranslated, else use TCEs */
if (tps == 0) {
/* TODO: Handle boundaries */
/* Use 4k pages like q35 ... for now */
tlb->iova = addr & 0xfffffffffffff000ull;
tlb->translated_addr = addr & 0x0003fffffffff000ull;
tlb->addr_mask = 0xfffull;
tlb->perm = IOMMU_RW;
} else {
uint32_t tce_shift, tbl_shift, sh;
uint64_t base, taddr, tce, tce_mask;
/* Address bits per bottom level TCE entry */
tce_shift = tps + 11;
/* Address bits per table level */
tbl_shift = tts + 8;
/* Top level table base address */
base = tta << 12;
/* Total shift to first level */
sh = tbl_shift * lev + tce_shift;
/* TODO: Limit to support IO page sizes */
/* TODO: Multi-level untested */
do {
lev--;
/* Grab the TCE address */
taddr = base | (((addr >> sh) & ((1ul << tbl_shift) - 1)) << 3);
if (dma_memory_read(&address_space_memory, taddr, &tce,
sizeof(tce), MEMTXATTRS_UNSPECIFIED)) {
phb_error(ds->phb, "Failed to read TCE at 0x%"PRIx64, taddr);
return;
}
tce = be64_to_cpu(tce);
/* Check permission for indirect TCE */
if ((lev >= 0) && !(tce & 3)) {
phb_error(ds->phb, "Invalid indirect TCE at 0x%"PRIx64, taddr);
phb_error(ds->phb, " xlate %"PRIx64":%c TVE=%"PRIx64, addr,
is_write ? 'W' : 'R', tve);
phb_error(ds->phb, " tta=%"PRIx64" lev=%d tts=%d tps=%d",
tta, lev, tts, tps);
return;
}
sh -= tbl_shift;
base = tce & ~0xfffull;
} while (lev >= 0);
/* We exit the loop with TCE being the final TCE */
if ((is_write & !(tce & 2)) || ((!is_write) && !(tce & 1))) {
phb_error(ds->phb, "TCE access fault at 0x%"PRIx64, taddr);
phb_error(ds->phb, " xlate %"PRIx64":%c TVE=%"PRIx64, addr,
is_write ? 'W' : 'R', tve);
phb_error(ds->phb, " tta=%"PRIx64" lev=%d tts=%d tps=%d",
tta, lev, tts, tps);
return;
}
tce_mask = ~((1ull << tce_shift) - 1);
tlb->iova = addr & tce_mask;
tlb->translated_addr = tce & tce_mask;
tlb->addr_mask = ~tce_mask;
tlb->perm = tce & 3;
}
}
static IOMMUTLBEntry pnv_phb4_translate_iommu(IOMMUMemoryRegion *iommu,
hwaddr addr,
IOMMUAccessFlags flag,
int iommu_idx)
{
PnvPhb4DMASpace *ds = container_of(iommu, PnvPhb4DMASpace, dma_mr);
int tve_sel;
uint64_t tve, cfg;
IOMMUTLBEntry ret = {
.target_as = &address_space_memory,
.iova = addr,
.translated_addr = 0,
.addr_mask = ~(hwaddr)0,
.perm = IOMMU_NONE,
};
/* Resolve PE# */
if (!pnv_phb4_resolve_pe(ds)) {
phb_error(ds->phb, "Failed to resolve PE# for bus @%p (%d) devfn 0x%x",
ds->bus, pci_bus_num(ds->bus), ds->devfn);
return ret;
}
/* Check top bits */
switch (addr >> 60) {
case 00:
/* DMA or 32-bit MSI ? */
cfg = ds->phb->regs[PHB_PHB4_CONFIG >> 3];
if ((cfg & PHB_PHB4C_32BIT_MSI_EN) &&
((addr & 0xffffffffffff0000ull) == 0xffff0000ull)) {
phb_error(ds->phb, "xlate on 32-bit MSI region");
return ret;
}
/* Choose TVE XXX Use PHB4 Control Register */
tve_sel = (addr >> 59) & 1;
tve = ds->phb->ioda_TVT[ds->pe_num * 2 + tve_sel];
pnv_phb4_translate_tve(ds, addr, flag & IOMMU_WO, tve, &ret);
break;
case 01:
phb_error(ds->phb, "xlate on 64-bit MSI region");
break;
default:
phb_error(ds->phb, "xlate on unsupported address 0x%"PRIx64, addr);
}
return ret;
}
#define TYPE_PNV_PHB4_IOMMU_MEMORY_REGION "pnv-phb4-iommu-memory-region"
DECLARE_INSTANCE_CHECKER(IOMMUMemoryRegion, PNV_PHB4_IOMMU_MEMORY_REGION,
TYPE_PNV_PHB4_IOMMU_MEMORY_REGION)
static void pnv_phb4_iommu_memory_region_class_init(ObjectClass *klass,
void *data)
{
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
imrc->translate = pnv_phb4_translate_iommu;
}
static const TypeInfo pnv_phb4_iommu_memory_region_info = {
.parent = TYPE_IOMMU_MEMORY_REGION,
.name = TYPE_PNV_PHB4_IOMMU_MEMORY_REGION,
.class_init = pnv_phb4_iommu_memory_region_class_init,
};
/*
* Return the index/phb-id of a PHB4 that belongs to a
* pec->stacks[stack_index] stack.
*/
int pnv_phb4_pec_get_phb_id(PnvPhb4PecState *pec, int stack_index)
{
PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
int index = pec->index;
int offset = 0;
while (index--) {
offset += pecc->num_phbs[index];
}
return offset + stack_index;
}
/*
* MSI/MSIX memory region implementation.
* The handler handles both MSI and MSIX.
*/
static void pnv_phb4_msi_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
PnvPhb4DMASpace *ds = opaque;
PnvPHB4 *phb = ds->phb;
uint32_t src = ((addr >> 4) & 0xffff) | (data & 0x1f);
/* Resolve PE# */
if (!pnv_phb4_resolve_pe(ds)) {
phb_error(phb, "Failed to resolve PE# for bus @%p (%d) devfn 0x%x",
ds->bus, pci_bus_num(ds->bus), ds->devfn);
return;
}
/* TODO: Check it doesn't collide with LSIs */
if (src >= phb->xsrc.nr_irqs) {
phb_error(phb, "MSI %d out of bounds", src);
return;
}
/* TODO: check PE/MSI assignement */
qemu_irq_pulse(phb->qirqs[src]);
}
/* There is no .read as the read result is undefined by PCI spec */
static uint64_t pnv_phb4_msi_read(void *opaque, hwaddr addr, unsigned size)
{
PnvPhb4DMASpace *ds = opaque;
phb_error(ds->phb, "Invalid MSI read @ 0x%" HWADDR_PRIx, addr);
return -1;
}
static const MemoryRegionOps pnv_phb4_msi_ops = {
.read = pnv_phb4_msi_read,
.write = pnv_phb4_msi_write,
.endianness = DEVICE_LITTLE_ENDIAN
};
static PnvPhb4DMASpace *pnv_phb4_dma_find(PnvPHB4 *phb, PCIBus *bus, int devfn)
{
PnvPhb4DMASpace *ds;
QLIST_FOREACH(ds, &phb->dma_spaces, list) {
if (ds->bus == bus && ds->devfn == devfn) {
break;
}
}
return ds;
}
static AddressSpace *pnv_phb4_dma_iommu(PCIBus *bus, void *opaque, int devfn)
{
PnvPHB4 *phb = opaque;
PnvPhb4DMASpace *ds;
char name[32];
ds = pnv_phb4_dma_find(phb, bus, devfn);
if (ds == NULL) {
ds = g_new0(PnvPhb4DMASpace, 1);
ds->bus = bus;
ds->devfn = devfn;
ds->pe_num = PHB_INVALID_PE;
ds->phb = phb;
snprintf(name, sizeof(name), "phb4-%d.%d-iommu", phb->chip_id,
phb->phb_id);
memory_region_init_iommu(&ds->dma_mr, sizeof(ds->dma_mr),
TYPE_PNV_PHB4_IOMMU_MEMORY_REGION,
OBJECT(phb), name, UINT64_MAX);
address_space_init(&ds->dma_as, MEMORY_REGION(&ds->dma_mr),
name);
memory_region_init_io(&ds->msi32_mr, OBJECT(phb), &pnv_phb4_msi_ops,
ds, "msi32", 0x10000);
memory_region_init_io(&ds->msi64_mr, OBJECT(phb), &pnv_phb4_msi_ops,
ds, "msi64", 0x100000);
pnv_phb4_update_msi_regions(ds);
QLIST_INSERT_HEAD(&phb->dma_spaces, ds, list);
}
return &ds->dma_as;
}
static void pnv_phb4_xscom_realize(PnvPHB4 *phb)
{
PnvPhb4PecState *pec = phb->pec;
PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
int stack_no = pnv_phb4_get_phb_stack_no(phb);
uint32_t pec_nest_base;
uint32_t pec_pci_base;
char name[64];
assert(pec);
/* Initialize the XSCOM regions for the stack registers */
snprintf(name, sizeof(name), "xscom-pec-%d.%d-nest-phb-%d",
pec->chip_id, pec->index, stack_no);
pnv_xscom_region_init(&phb->nest_regs_mr, OBJECT(phb),
&pnv_pec_stk_nest_xscom_ops, phb, name,
PHB4_PEC_NEST_STK_REGS_COUNT);
snprintf(name, sizeof(name), "xscom-pec-%d.%d-pci-phb-%d",
pec->chip_id, pec->index, stack_no);
pnv_xscom_region_init(&phb->pci_regs_mr, OBJECT(phb),
&pnv_pec_stk_pci_xscom_ops, phb, name,
PHB4_PEC_PCI_STK_REGS_COUNT);
/* PHB pass-through */
snprintf(name, sizeof(name), "xscom-pec-%d.%d-pci-phb-%d",
pec->chip_id, pec->index, stack_no);
pnv_xscom_region_init(&phb->phb_regs_mr, OBJECT(phb),
&pnv_phb4_xscom_ops, phb, name, 0x40);
pec_nest_base = pecc->xscom_nest_base(pec);
pec_pci_base = pecc->xscom_pci_base(pec);
/* Populate the XSCOM address space. */
pnv_xscom_add_subregion(pec->chip,
pec_nest_base + 0x40 * (stack_no + 1),
&phb->nest_regs_mr);
pnv_xscom_add_subregion(pec->chip,
pec_pci_base + 0x40 * (stack_no + 1),
&phb->pci_regs_mr);
pnv_xscom_add_subregion(pec->chip,
pec_pci_base + PNV9_XSCOM_PEC_PCI_STK0 +
0x40 * stack_no,
&phb->phb_regs_mr);
}
static void pnv_phb4_instance_init(Object *obj)
{
PnvPHB4 *phb = PNV_PHB4(obj);
QLIST_INIT(&phb->dma_spaces);
/* XIVE interrupt source object */
object_initialize_child(obj, "source", &phb->xsrc, TYPE_XIVE_SOURCE);
}
void pnv_phb4_bus_init(DeviceState *dev, PnvPHB4 *phb)
{
PCIHostState *pci = PCI_HOST_BRIDGE(dev);
char name[32];
/*
* PHB4 doesn't support IO space. However, qemu gets very upset if
* we don't have an IO region to anchor IO BARs onto so we just
* initialize one which we never hook up to anything
*/
snprintf(name, sizeof(name), "phb4-%d.%d-pci-io", phb->chip_id,
phb->phb_id);
memory_region_init(&phb->pci_io, OBJECT(phb), name, 0x10000);
snprintf(name, sizeof(name), "phb4-%d.%d-pci-mmio", phb->chip_id,
phb->phb_id);
memory_region_init(&phb->pci_mmio, OBJECT(phb), name,
PCI_MMIO_TOTAL_SIZE);
pci->bus = pci_register_root_bus(dev, dev->id ? dev->id : NULL,
pnv_phb4_set_irq, pnv_phb4_map_irq, phb,
&phb->pci_mmio, &phb->pci_io,
0, 4, TYPE_PNV_PHB4_ROOT_BUS);
object_property_set_int(OBJECT(pci->bus), "phb-id", phb->phb_id,
&error_abort);
object_property_set_int(OBJECT(pci->bus), "chip-id", phb->chip_id,
&error_abort);
pci_setup_iommu(pci->bus, pnv_phb4_dma_iommu, phb);
pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE;
}
static void pnv_phb4_realize(DeviceState *dev, Error **errp)
{
PnvPHB4 *phb = PNV_PHB4(dev);
XiveSource *xsrc = &phb->xsrc;
int nr_irqs;
char name[32];
/* Set the "big_phb" flag */
phb->big_phb = phb->phb_id == 0 || phb->phb_id == 3;
/* Controller Registers */
snprintf(name, sizeof(name), "phb4-%d.%d-regs", phb->chip_id,
phb->phb_id);
memory_region_init_io(&phb->mr_regs, OBJECT(phb), &pnv_phb4_reg_ops, phb,
name, 0x2000);
/* Setup XIVE Source */
if (phb->big_phb) {
nr_irqs = PNV_PHB4_MAX_INTs;
} else {
nr_irqs = PNV_PHB4_MAX_INTs >> 1;
}
object_property_set_int(OBJECT(xsrc), "nr-irqs", nr_irqs, &error_fatal);
object_property_set_link(OBJECT(xsrc), "xive", OBJECT(phb), &error_fatal);
if (!qdev_realize(DEVICE(xsrc), NULL, errp)) {
return;
}
pnv_phb4_update_xsrc(phb);
phb->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs);
pnv_phb4_xscom_realize(phb);
}
/*
* Address base trigger mode (POWER10)
*
* Trigger directly the IC ESB page
*/
static void pnv_phb4_xive_notify_abt(PnvPHB4 *phb, uint32_t srcno,
bool pq_checked)
{
uint64_t notif_port = phb->regs[PHB_INT_NOTIFY_ADDR >> 3];
uint64_t data = 0; /* trigger data : don't care */
hwaddr addr;
MemTxResult result;
int esb_shift;
if (notif_port & PHB_INT_NOTIFY_ADDR_64K) {
esb_shift = 16;
} else {
esb_shift = 12;
}
/* Compute the address of the IC ESB management page */
addr = (notif_port & ~PHB_INT_NOTIFY_ADDR_64K);
addr |= (1ull << (esb_shift + 1)) * srcno;
addr |= (1ull << esb_shift);
/*
* When the PQ state bits are checked on the PHB, the associated
* PQ state bits on the IC should be ignored. Use the unconditional
* trigger offset to inject a trigger on the IC. This is always
* the case for LSIs
*/
if (pq_checked) {
addr |= XIVE_ESB_INJECT;
}
trace_pnv_phb4_xive_notify_ic(addr, data);
address_space_stq_be(&address_space_memory, addr, data,
MEMTXATTRS_UNSPECIFIED, &result);
if (result != MEMTX_OK) {
phb_error(phb, "trigger failed @%"HWADDR_PRIx "\n", addr);
return;
}
}
static void pnv_phb4_xive_notify_ic(PnvPHB4 *phb, uint32_t srcno,
bool pq_checked)
{
uint64_t notif_port = phb->regs[PHB_INT_NOTIFY_ADDR >> 3];
uint32_t offset = phb->regs[PHB_INT_NOTIFY_INDEX >> 3];
uint64_t data = offset | srcno;
MemTxResult result;
if (pq_checked) {
data |= XIVE_TRIGGER_PQ;
}
trace_pnv_phb4_xive_notify_ic(notif_port, data);
address_space_stq_be(&address_space_memory, notif_port, data,
MEMTXATTRS_UNSPECIFIED, &result);
if (result != MEMTX_OK) {
phb_error(phb, "trigger failed @%"HWADDR_PRIx "\n", notif_port);
return;
}
}
static void pnv_phb4_xive_notify(XiveNotifier *xf, uint32_t srcno,
bool pq_checked)
{
PnvPHB4 *phb = PNV_PHB4(xf);
if (phb->regs[PHB_CTRLR >> 3] & PHB_CTRLR_IRQ_ABT_MODE) {
pnv_phb4_xive_notify_abt(phb, srcno, pq_checked);
} else {
pnv_phb4_xive_notify_ic(phb, srcno, pq_checked);
}
}
static Property pnv_phb4_properties[] = {
DEFINE_PROP_UINT32("index", PnvPHB4, phb_id, 0),
DEFINE_PROP_UINT32("chip-id", PnvPHB4, chip_id, 0),
DEFINE_PROP_LINK("pec", PnvPHB4, pec, TYPE_PNV_PHB4_PEC,
PnvPhb4PecState *),
DEFINE_PROP_LINK("phb-base", PnvPHB4, phb_base, TYPE_PNV_PHB, PnvPHB *),
DEFINE_PROP_END_OF_LIST(),
};
static void pnv_phb4_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass);
dc->realize = pnv_phb4_realize;
device_class_set_props(dc, pnv_phb4_properties);
dc->user_creatable = false;
xfc->notify = pnv_phb4_xive_notify;
}
static const TypeInfo pnv_phb4_type_info = {
.name = TYPE_PNV_PHB4,
.parent = TYPE_DEVICE,
.instance_init = pnv_phb4_instance_init,
.instance_size = sizeof(PnvPHB4),
.class_init = pnv_phb4_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_XIVE_NOTIFIER },
{ },
}
};
static const TypeInfo pnv_phb5_type_info = {
.name = TYPE_PNV_PHB5,
.parent = TYPE_PNV_PHB4,
.instance_size = sizeof(PnvPHB4),
};
static void pnv_phb4_root_bus_get_prop(Object *obj, Visitor *v,
const char *name,
void *opaque, Error **errp)
{
PnvPHB4RootBus *bus = PNV_PHB4_ROOT_BUS(obj);
uint64_t value = 0;
if (strcmp(name, "phb-id") == 0) {
value = bus->phb_id;
} else {
value = bus->chip_id;
}
visit_type_size(v, name, &value, errp);
}
static void pnv_phb4_root_bus_set_prop(Object *obj, Visitor *v,
const char *name,
void *opaque, Error **errp)
{
PnvPHB4RootBus *bus = PNV_PHB4_ROOT_BUS(obj);
uint64_t value;
if (!visit_type_size(v, name, &value, errp)) {
return;
}
if (strcmp(name, "phb-id") == 0) {
bus->phb_id = value;
} else {
bus->chip_id = value;
}
}
static void pnv_phb4_root_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
object_class_property_add(klass, "phb-id", "int",
pnv_phb4_root_bus_get_prop,
pnv_phb4_root_bus_set_prop,
NULL, NULL);
object_class_property_add(klass, "chip-id", "int",
pnv_phb4_root_bus_get_prop,
pnv_phb4_root_bus_set_prop,
NULL, NULL);
/*
* PHB4 has only a single root complex. Enforce the limit on the
* parent bus
*/
k->max_dev = 1;
}
static const TypeInfo pnv_phb4_root_bus_info = {
.name = TYPE_PNV_PHB4_ROOT_BUS,
.parent = TYPE_PCIE_BUS,
.class_init = pnv_phb4_root_bus_class_init,
};
static void pnv_phb4_register_types(void)
{
type_register_static(&pnv_phb4_root_bus_info);
type_register_static(&pnv_phb4_type_info);
type_register_static(&pnv_phb5_type_info);
type_register_static(&pnv_phb4_iommu_memory_region_info);
}
type_init(pnv_phb4_register_types);
void pnv_phb4_pic_print_info(PnvPHB4 *phb, Monitor *mon)
{
uint64_t notif_port =
phb->regs[PHB_INT_NOTIFY_ADDR >> 3] & ~PHB_INT_NOTIFY_ADDR_64K;
uint32_t offset = phb->regs[PHB_INT_NOTIFY_INDEX >> 3];
bool abt = !!(phb->regs[PHB_CTRLR >> 3] & PHB_CTRLR_IRQ_ABT_MODE);
monitor_printf(mon, "PHB4[%x:%x] Source %08x .. %08x %s @%"HWADDR_PRIx"\n",
phb->chip_id, phb->phb_id,
offset, offset + phb->xsrc.nr_irqs - 1,
abt ? "ABT" : "",
notif_port);
xive_source_pic_print_info(&phb->xsrc, 0, mon);
}
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