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qemu/hw/s390x/s390-pci-inst.c
Eugenio Pérez 5039caf3c4 memory: Add IOMMUTLBEvent 
This way we can tell between regular IOMMUTLBEntry (entry of IOMMU
hardware) and notifications.

In the notifications, we set explicitly if it is a MAPs or an UNMAP,
instead of trusting in entry permissions to differentiate them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20201116165506.31315-3-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
2020-12-08 13:48:57 -05:00

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/*
* s390 PCI instructions
*
* Copyright 2014 IBM Corp.
* Author(s): Frank Blaschka <frank.blaschka@de.ibm.com>
* Hong Bo Li <lihbbj@cn.ibm.com>
* Yi Min Zhao <zyimin@cn.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/memop.h"
#include "exec/memory-internal.h"
#include "qemu/error-report.h"
#include "sysemu/hw_accel.h"
#include "hw/s390x/s390-pci-inst.h"
#include "hw/s390x/s390-pci-bus.h"
#include "hw/s390x/tod.h"
#ifndef DEBUG_S390PCI_INST
#define DEBUG_S390PCI_INST 0
#endif
#define DPRINTF(fmt, ...) \
do { \
if (DEBUG_S390PCI_INST) { \
fprintf(stderr, "s390pci-inst: " fmt, ## __VA_ARGS__); \
} \
} while (0)
static inline void inc_dma_avail(S390PCIIOMMU *iommu)
{
if (iommu->dma_limit) {
iommu->dma_limit->avail++;
}
}
static inline void dec_dma_avail(S390PCIIOMMU *iommu)
{
if (iommu->dma_limit) {
iommu->dma_limit->avail--;
}
}
static void s390_set_status_code(CPUS390XState *env,
uint8_t r, uint64_t status_code)
{
env->regs[r] &= ~0xff000000ULL;
env->regs[r] |= (status_code & 0xff) << 24;
}
static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
{
S390PCIBusDevice *pbdev = NULL;
S390pciState *s = s390_get_phb();
uint32_t res_code, initial_l2, g_l2;
int rc, i;
uint64_t resume_token;
rc = 0;
if (lduw_p(&rrb->request.hdr.len) != 32) {
res_code = CLP_RC_LEN;
rc = -EINVAL;
goto out;
}
if ((ldl_p(&rrb->request.fmt) & CLP_MASK_FMT) != 0) {
res_code = CLP_RC_FMT;
rc = -EINVAL;
goto out;
}
if ((ldl_p(&rrb->request.fmt) & ~CLP_MASK_FMT) != 0 ||
ldq_p(&rrb->request.reserved1) != 0) {
res_code = CLP_RC_RESNOT0;
rc = -EINVAL;
goto out;
}
resume_token = ldq_p(&rrb->request.resume_token);
if (resume_token) {
pbdev = s390_pci_find_dev_by_idx(s, resume_token);
if (!pbdev) {
res_code = CLP_RC_LISTPCI_BADRT;
rc = -EINVAL;
goto out;
}
} else {
pbdev = s390_pci_find_next_avail_dev(s, NULL);
}
if (lduw_p(&rrb->response.hdr.len) < 48) {
res_code = CLP_RC_8K;
rc = -EINVAL;
goto out;
}
initial_l2 = lduw_p(&rrb->response.hdr.len);
if ((initial_l2 - LIST_PCI_HDR_LEN) % sizeof(ClpFhListEntry)
!= 0) {
res_code = CLP_RC_LEN;
rc = -EINVAL;
*cc = 3;
goto out;
}
stl_p(&rrb->response.fmt, 0);
stq_p(&rrb->response.reserved1, 0);
stl_p(&rrb->response.mdd, FH_MASK_SHM);
stw_p(&rrb->response.max_fn, PCI_MAX_FUNCTIONS);
rrb->response.flags = UID_CHECKING_ENABLED;
rrb->response.entry_size = sizeof(ClpFhListEntry);
i = 0;
g_l2 = LIST_PCI_HDR_LEN;
while (g_l2 < initial_l2 && pbdev) {
stw_p(&rrb->response.fh_list[i].device_id,
pci_get_word(pbdev->pdev->config + PCI_DEVICE_ID));
stw_p(&rrb->response.fh_list[i].vendor_id,
pci_get_word(pbdev->pdev->config + PCI_VENDOR_ID));
/* Ignore RESERVED devices. */
stl_p(&rrb->response.fh_list[i].config,
pbdev->state == ZPCI_FS_STANDBY ? 0 : 1 << 31);
stl_p(&rrb->response.fh_list[i].fid, pbdev->fid);
stl_p(&rrb->response.fh_list[i].fh, pbdev->fh);
g_l2 += sizeof(ClpFhListEntry);
/* Add endian check for DPRINTF? */
DPRINTF("g_l2 %d vendor id 0x%x device id 0x%x fid 0x%x fh 0x%x\n",
g_l2,
lduw_p(&rrb->response.fh_list[i].vendor_id),
lduw_p(&rrb->response.fh_list[i].device_id),
ldl_p(&rrb->response.fh_list[i].fid),
ldl_p(&rrb->response.fh_list[i].fh));
pbdev = s390_pci_find_next_avail_dev(s, pbdev);
i++;
}
if (!pbdev) {
resume_token = 0;
} else {
resume_token = pbdev->fh & FH_MASK_INDEX;
}
stq_p(&rrb->response.resume_token, resume_token);
stw_p(&rrb->response.hdr.len, g_l2);
stw_p(&rrb->response.hdr.rsp, CLP_RC_OK);
out:
if (rc) {
DPRINTF("list pci failed rc 0x%x\n", rc);
stw_p(&rrb->response.hdr.rsp, res_code);
}
return rc;
}
int clp_service_call(S390CPU *cpu, uint8_t r2, uintptr_t ra)
{
ClpReqHdr *reqh;
ClpRspHdr *resh;
S390PCIBusDevice *pbdev;
uint32_t req_len;
uint32_t res_len;
uint8_t buffer[4096 * 2];
uint8_t cc = 0;
CPUS390XState *env = &cpu->env;
S390pciState *s = s390_get_phb();
int i;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
if (s390_cpu_virt_mem_read(cpu, env->regs[r2], r2, buffer, sizeof(*reqh))) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
reqh = (ClpReqHdr *)buffer;
req_len = lduw_p(&reqh->len);
if (req_len < 16 || req_len > 8184 || (req_len % 8 != 0)) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
if (s390_cpu_virt_mem_read(cpu, env->regs[r2], r2, buffer,
req_len + sizeof(*resh))) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
resh = (ClpRspHdr *)(buffer + req_len);
res_len = lduw_p(&resh->len);
if (res_len < 8 || res_len > 8176 || (res_len % 8 != 0)) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
if ((req_len + res_len) > 8192) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
if (s390_cpu_virt_mem_read(cpu, env->regs[r2], r2, buffer,
req_len + res_len)) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
if (req_len != 32) {
stw_p(&resh->rsp, CLP_RC_LEN);
goto out;
}
switch (lduw_p(&reqh->cmd)) {
case CLP_LIST_PCI: {
ClpReqRspListPci *rrb = (ClpReqRspListPci *)buffer;
list_pci(rrb, &cc);
break;
}
case CLP_SET_PCI_FN: {
ClpReqSetPci *reqsetpci = (ClpReqSetPci *)reqh;
ClpRspSetPci *ressetpci = (ClpRspSetPci *)resh;
pbdev = s390_pci_find_dev_by_fh(s, ldl_p(&reqsetpci->fh));
if (!pbdev) {
stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FH);
goto out;
}
switch (reqsetpci->oc) {
case CLP_SET_ENABLE_PCI_FN:
switch (reqsetpci->ndas) {
case 0:
stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_DMAAS);
goto out;
case 1:
break;
default:
stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_RES);
goto out;
}
if (pbdev->fh & FH_MASK_ENABLE) {
stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FHOP);
goto out;
}
pbdev->fh |= FH_MASK_ENABLE;
pbdev->state = ZPCI_FS_ENABLED;
stl_p(&ressetpci->fh, pbdev->fh);
stw_p(&ressetpci->hdr.rsp, CLP_RC_OK);
break;
case CLP_SET_DISABLE_PCI_FN:
if (!(pbdev->fh & FH_MASK_ENABLE)) {
stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FHOP);
goto out;
}
device_legacy_reset(DEVICE(pbdev));
pbdev->fh &= ~FH_MASK_ENABLE;
pbdev->state = ZPCI_FS_DISABLED;
stl_p(&ressetpci->fh, pbdev->fh);
stw_p(&ressetpci->hdr.rsp, CLP_RC_OK);
break;
default:
DPRINTF("unknown set pci command\n");
stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FHOP);
break;
}
break;
}
case CLP_QUERY_PCI_FN: {
ClpReqQueryPci *reqquery = (ClpReqQueryPci *)reqh;
ClpRspQueryPci *resquery = (ClpRspQueryPci *)resh;
pbdev = s390_pci_find_dev_by_fh(s, ldl_p(&reqquery->fh));
if (!pbdev) {
DPRINTF("query pci no pci dev\n");
stw_p(&resquery->hdr.rsp, CLP_RC_SETPCIFN_FH);
goto out;
}
stq_p(&resquery->sdma, pbdev->zpci_fn.sdma);
stq_p(&resquery->edma, pbdev->zpci_fn.edma);
stw_p(&resquery->pchid, pbdev->zpci_fn.pchid);
resquery->flags = pbdev->zpci_fn.flags;
resquery->pfgid = pbdev->zpci_fn.pfgid;
stl_p(&resquery->fid, pbdev->zpci_fn.fid);
stl_p(&resquery->uid, pbdev->zpci_fn.uid);
for (i = 0; i < PCI_BAR_COUNT; i++) {
uint32_t data = pci_get_long(pbdev->pdev->config +
PCI_BASE_ADDRESS_0 + (i * 4));
stl_p(&resquery->bar[i], data);
resquery->bar_size[i] = pbdev->pdev->io_regions[i].size ?
ctz64(pbdev->pdev->io_regions[i].size) : 0;
DPRINTF("bar %d addr 0x%x size 0x%" PRIx64 "barsize 0x%x\n", i,
ldl_p(&resquery->bar[i]),
pbdev->pdev->io_regions[i].size,
resquery->bar_size[i]);
}
stw_p(&resquery->hdr.rsp, CLP_RC_OK);
break;
}
case CLP_QUERY_PCI_FNGRP: {
ClpRspQueryPciGrp *resgrp = (ClpRspQueryPciGrp *)resh;
ClpReqQueryPciGrp *reqgrp = (ClpReqQueryPciGrp *)reqh;
S390PCIGroup *group;
group = s390_group_find(reqgrp->g);
if (!group) {
/* We do not allow access to unknown groups */
/* The group must have been obtained with a vfio device */
stw_p(&resgrp->hdr.rsp, CLP_RC_QUERYPCIFG_PFGID);
goto out;
}
resgrp->fr = group->zpci_group.fr;
stq_p(&resgrp->dasm, group->zpci_group.dasm);
stq_p(&resgrp->msia, group->zpci_group.msia);
stw_p(&resgrp->mui, group->zpci_group.mui);
stw_p(&resgrp->i, group->zpci_group.i);
stw_p(&resgrp->maxstbl, group->zpci_group.maxstbl);
resgrp->version = group->zpci_group.version;
stw_p(&resgrp->hdr.rsp, CLP_RC_OK);
break;
}
default:
DPRINTF("unknown clp command\n");
stw_p(&resh->rsp, CLP_RC_CMD);
break;
}
out:
if (s390_cpu_virt_mem_write(cpu, env->regs[r2], r2, buffer,
req_len + res_len)) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
setcc(cpu, cc);
return 0;
}
/**
* Swap data contained in s390x big endian registers to little endian
* PCI bars.
*
* @ptr: a pointer to a uint64_t data field
* @len: the length of the valid data, must be 1,2,4 or 8
*/
static int zpci_endian_swap(uint64_t *ptr, uint8_t len)
{
uint64_t data = *ptr;
switch (len) {
case 1:
break;
case 2:
data = bswap16(data);
break;
case 4:
data = bswap32(data);
break;
case 8:
data = bswap64(data);
break;
default:
return -EINVAL;
}
*ptr = data;
return 0;
}
static MemoryRegion *s390_get_subregion(MemoryRegion *mr, uint64_t offset,
uint8_t len)
{
MemoryRegion *subregion;
uint64_t subregion_size;
QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
subregion_size = int128_get64(subregion->size);
if ((offset >= subregion->addr) &&
(offset + len) <= (subregion->addr + subregion_size)) {
mr = subregion;
break;
}
}
return mr;
}
static MemTxResult zpci_read_bar(S390PCIBusDevice *pbdev, uint8_t pcias,
uint64_t offset, uint64_t *data, uint8_t len)
{
MemoryRegion *mr;
mr = pbdev->pdev->io_regions[pcias].memory;
mr = s390_get_subregion(mr, offset, len);
offset -= mr->addr;
return memory_region_dispatch_read(mr, offset, data,
size_memop(len) | MO_BE,
MEMTXATTRS_UNSPECIFIED);
}
int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
S390PCIBusDevice *pbdev;
uint64_t offset;
uint64_t data;
MemTxResult result;
uint8_t len;
uint32_t fh;
uint8_t pcias;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
if (r2 & 0x1) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return 0;
}
fh = env->regs[r2] >> 32;
pcias = (env->regs[r2] >> 16) & 0xf;
len = env->regs[r2] & 0xf;
offset = env->regs[r2 + 1];
if (!(fh & FH_MASK_ENABLE)) {
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
if (!pbdev) {
DPRINTF("pcilg no pci dev\n");
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
switch (pbdev->state) {
case ZPCI_FS_PERMANENT_ERROR:
case ZPCI_FS_ERROR:
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r2, ZPCI_PCI_ST_BLOCKED);
return 0;
default:
break;
}
switch (pcias) {
case ZPCI_IO_BAR_MIN...ZPCI_IO_BAR_MAX:
if (!len || (len > (8 - (offset & 0x7)))) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
result = zpci_read_bar(pbdev, pcias, offset, &data, len);
if (result != MEMTX_OK) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
break;
case ZPCI_CONFIG_BAR:
if (!len || (len > (4 - (offset & 0x3))) || len == 3) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
data = pci_host_config_read_common(
pbdev->pdev, offset, pci_config_size(pbdev->pdev), len);
if (zpci_endian_swap(&data, len)) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
break;
default:
DPRINTF("pcilg invalid space\n");
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r2, ZPCI_PCI_ST_INVAL_AS);
return 0;
}
pbdev->fmb.counter[ZPCI_FMB_CNT_LD]++;
env->regs[r1] = data;
setcc(cpu, ZPCI_PCI_LS_OK);
return 0;
}
static MemTxResult zpci_write_bar(S390PCIBusDevice *pbdev, uint8_t pcias,
uint64_t offset, uint64_t data, uint8_t len)
{
MemoryRegion *mr;
mr = pbdev->pdev->io_regions[pcias].memory;
mr = s390_get_subregion(mr, offset, len);
offset -= mr->addr;
return memory_region_dispatch_write(mr, offset, data,
size_memop(len) | MO_BE,
MEMTXATTRS_UNSPECIFIED);
}
int pcistg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
uint64_t offset, data;
S390PCIBusDevice *pbdev;
MemTxResult result;
uint8_t len;
uint32_t fh;
uint8_t pcias;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
if (r2 & 0x1) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return 0;
}
fh = env->regs[r2] >> 32;
pcias = (env->regs[r2] >> 16) & 0xf;
len = env->regs[r2] & 0xf;
offset = env->regs[r2 + 1];
data = env->regs[r1];
if (!(fh & FH_MASK_ENABLE)) {
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
if (!pbdev) {
DPRINTF("pcistg no pci dev\n");
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
switch (pbdev->state) {
/* ZPCI_FS_RESERVED, ZPCI_FS_STANDBY and ZPCI_FS_DISABLED
* are already covered by the FH_MASK_ENABLE check above
*/
case ZPCI_FS_PERMANENT_ERROR:
case ZPCI_FS_ERROR:
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r2, ZPCI_PCI_ST_BLOCKED);
return 0;
default:
break;
}
switch (pcias) {
/* A ZPCI PCI card may use any BAR from BAR 0 to BAR 5 */
case ZPCI_IO_BAR_MIN...ZPCI_IO_BAR_MAX:
/* Check length:
* A length of 0 is invalid and length should not cross a double word
*/
if (!len || (len > (8 - (offset & 0x7)))) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
result = zpci_write_bar(pbdev, pcias, offset, data, len);
if (result != MEMTX_OK) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
break;
case ZPCI_CONFIG_BAR:
/* ZPCI uses the pseudo BAR number 15 as configuration space */
/* possible access lengths are 1,2,4 and must not cross a word */
if (!len || (len > (4 - (offset & 0x3))) || len == 3) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
/* len = 1,2,4 so we do not need to test */
zpci_endian_swap(&data, len);
pci_host_config_write_common(pbdev->pdev, offset,
pci_config_size(pbdev->pdev),
data, len);
break;
default:
DPRINTF("pcistg invalid space\n");
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r2, ZPCI_PCI_ST_INVAL_AS);
return 0;
}
pbdev->fmb.counter[ZPCI_FMB_CNT_ST]++;
setcc(cpu, ZPCI_PCI_LS_OK);
return 0;
}
static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
S390IOTLBEntry *entry)
{
S390IOTLBEntry *cache = g_hash_table_lookup(iommu->iotlb, &entry->iova);
IOMMUTLBEvent event = {
.type = entry->perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP,
.entry = {
.target_as = &address_space_memory,
.iova = entry->iova,
.translated_addr = entry->translated_addr,
.perm = entry->perm,
.addr_mask = ~PAGE_MASK,
},
};
if (event.type == IOMMU_NOTIFIER_UNMAP) {
if (!cache) {
goto out;
}
g_hash_table_remove(iommu->iotlb, &entry->iova);
inc_dma_avail(iommu);
} else {
if (cache) {
if (cache->perm == entry->perm &&
cache->translated_addr == entry->translated_addr) {
goto out;
}
event.type = IOMMU_NOTIFIER_UNMAP;
event.entry.perm = IOMMU_NONE;
memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
event.type = IOMMU_NOTIFIER_MAP;
event.entry.perm = entry->perm;
}
cache = g_new(S390IOTLBEntry, 1);
cache->iova = entry->iova;
cache->translated_addr = entry->translated_addr;
cache->len = PAGE_SIZE;
cache->perm = entry->perm;
g_hash_table_replace(iommu->iotlb, &cache->iova, cache);
dec_dma_avail(iommu);
}
memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
out:
return iommu->dma_limit ? iommu->dma_limit->avail : 1;
}
int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
uint32_t fh;
uint16_t error = 0;
S390PCIBusDevice *pbdev;
S390PCIIOMMU *iommu;
S390IOTLBEntry entry;
hwaddr start, end;
uint32_t dma_avail;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
if (r2 & 0x1) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return 0;
}
fh = env->regs[r1] >> 32;
start = env->regs[r2];
end = start + env->regs[r2 + 1];
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
if (!pbdev) {
DPRINTF("rpcit no pci dev\n");
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
switch (pbdev->state) {
case ZPCI_FS_RESERVED:
case ZPCI_FS_STANDBY:
case ZPCI_FS_DISABLED:
case ZPCI_FS_PERMANENT_ERROR:
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
case ZPCI_FS_ERROR:
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_MOD_ST_ERROR_RECOVER);
return 0;
default:
break;
}
iommu = pbdev->iommu;
if (iommu->dma_limit) {
dma_avail = iommu->dma_limit->avail;
} else {
dma_avail = 1;
}
if (!iommu->g_iota) {
error = ERR_EVENT_INVALAS;
goto err;
}
if (end < iommu->pba || start > iommu->pal) {
error = ERR_EVENT_OORANGE;
goto err;
}
while (start < end) {
error = s390_guest_io_table_walk(iommu->g_iota, start, &entry);
if (error) {
break;
}
start += entry.len;
while (entry.iova < start && entry.iova < end &&
(dma_avail > 0 || entry.perm == IOMMU_NONE)) {
dma_avail = s390_pci_update_iotlb(iommu, &entry);
entry.iova += PAGE_SIZE;
entry.translated_addr += PAGE_SIZE;
}
}
err:
if (error) {
pbdev->state = ZPCI_FS_ERROR;
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_PCI_ST_FUNC_IN_ERR);
s390_pci_generate_error_event(error, pbdev->fh, pbdev->fid, start, 0);
} else {
pbdev->fmb.counter[ZPCI_FMB_CNT_RPCIT]++;
if (dma_avail > 0) {
setcc(cpu, ZPCI_PCI_LS_OK);
} else {
/* vfio DMA mappings are exhausted, trigger a RPCIT */
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_RPCIT_ST_INSUFF_RES);
}
}
return 0;
}
int pcistb_service_call(S390CPU *cpu, uint8_t r1, uint8_t r3, uint64_t gaddr,
uint8_t ar, uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
S390PCIBusDevice *pbdev;
MemoryRegion *mr;
MemTxResult result;
uint64_t offset;
int i;
uint32_t fh;
uint8_t pcias;
uint8_t len;
uint8_t buffer[128];
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
fh = env->regs[r1] >> 32;
pcias = (env->regs[r1] >> 16) & 0xf;
len = env->regs[r1] & 0xff;
offset = env->regs[r3];
if (!(fh & FH_MASK_ENABLE)) {
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
if (!pbdev) {
DPRINTF("pcistb no pci dev fh 0x%x\n", fh);
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
switch (pbdev->state) {
case ZPCI_FS_PERMANENT_ERROR:
case ZPCI_FS_ERROR:
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_PCI_ST_BLOCKED);
return 0;
default:
break;
}
if (pcias > ZPCI_IO_BAR_MAX) {
DPRINTF("pcistb invalid space\n");
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_PCI_ST_INVAL_AS);
return 0;
}
/* Verify the address, offset and length */
/* offset must be a multiple of 8 */
if (offset % 8) {
goto specification_error;
}
/* Length must be greater than 8, a multiple of 8 */
/* and not greater than maxstbl */
if ((len <= 8) || (len % 8) ||
(len > pbdev->pci_group->zpci_group.maxstbl)) {
goto specification_error;
}
/* Do not cross a 4K-byte boundary */
if (((offset & 0xfff) + len) > 0x1000) {
goto specification_error;
}
/* Guest address must be double word aligned */
if (gaddr & 0x07UL) {
goto specification_error;
}
mr = pbdev->pdev->io_regions[pcias].memory;
mr = s390_get_subregion(mr, offset, len);
offset -= mr->addr;
if (!memory_region_access_valid(mr, offset, len, true,
MEMTXATTRS_UNSPECIFIED)) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
if (s390_cpu_virt_mem_read(cpu, gaddr, ar, buffer, len)) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
for (i = 0; i < len / 8; i++) {
result = memory_region_dispatch_write(mr, offset + i * 8,
ldq_p(buffer + i * 8),
MO_64, MEMTXATTRS_UNSPECIFIED);
if (result != MEMTX_OK) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
}
pbdev->fmb.counter[ZPCI_FMB_CNT_STB]++;
setcc(cpu, ZPCI_PCI_LS_OK);
return 0;
specification_error:
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return 0;
}
static int reg_irqs(CPUS390XState *env, S390PCIBusDevice *pbdev, ZpciFib fib)
{
int ret, len;
uint8_t isc = FIB_DATA_ISC(ldl_p(&fib.data));
pbdev->routes.adapter.adapter_id = css_get_adapter_id(
CSS_IO_ADAPTER_PCI, isc);
pbdev->summary_ind = get_indicator(ldq_p(&fib.aisb), sizeof(uint64_t));
len = BITS_TO_LONGS(FIB_DATA_NOI(ldl_p(&fib.data))) * sizeof(unsigned long);
pbdev->indicator = get_indicator(ldq_p(&fib.aibv), len);
ret = map_indicator(&pbdev->routes.adapter, pbdev->summary_ind);
if (ret) {
goto out;
}
ret = map_indicator(&pbdev->routes.adapter, pbdev->indicator);
if (ret) {
goto out;
}
pbdev->routes.adapter.summary_addr = ldq_p(&fib.aisb);
pbdev->routes.adapter.summary_offset = FIB_DATA_AISBO(ldl_p(&fib.data));
pbdev->routes.adapter.ind_addr = ldq_p(&fib.aibv);
pbdev->routes.adapter.ind_offset = FIB_DATA_AIBVO(ldl_p(&fib.data));
pbdev->isc = isc;
pbdev->noi = FIB_DATA_NOI(ldl_p(&fib.data));
pbdev->sum = FIB_DATA_SUM(ldl_p(&fib.data));
DPRINTF("reg_irqs adapter id %d\n", pbdev->routes.adapter.adapter_id);
return 0;
out:
release_indicator(&pbdev->routes.adapter, pbdev->summary_ind);
release_indicator(&pbdev->routes.adapter, pbdev->indicator);
pbdev->summary_ind = NULL;
pbdev->indicator = NULL;
return ret;
}
int pci_dereg_irqs(S390PCIBusDevice *pbdev)
{
release_indicator(&pbdev->routes.adapter, pbdev->summary_ind);
release_indicator(&pbdev->routes.adapter, pbdev->indicator);
pbdev->summary_ind = NULL;
pbdev->indicator = NULL;
pbdev->routes.adapter.summary_addr = 0;
pbdev->routes.adapter.summary_offset = 0;
pbdev->routes.adapter.ind_addr = 0;
pbdev->routes.adapter.ind_offset = 0;
pbdev->isc = 0;
pbdev->noi = 0;
pbdev->sum = 0;
DPRINTF("dereg_irqs adapter id %d\n", pbdev->routes.adapter.adapter_id);
return 0;
}
static int reg_ioat(CPUS390XState *env, S390PCIIOMMU *iommu, ZpciFib fib,
uintptr_t ra)
{
uint64_t pba = ldq_p(&fib.pba);
uint64_t pal = ldq_p(&fib.pal);
uint64_t g_iota = ldq_p(&fib.iota);
uint8_t dt = (g_iota >> 2) & 0x7;
uint8_t t = (g_iota >> 11) & 0x1;
pba &= ~0xfff;
pal |= 0xfff;
if (pba > pal || pba < ZPCI_SDMA_ADDR || pal > ZPCI_EDMA_ADDR) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return -EINVAL;
}
/* currently we only support designation type 1 with translation */
if (!(dt == ZPCI_IOTA_RTTO && t)) {
error_report("unsupported ioat dt %d t %d", dt, t);
s390_program_interrupt(env, PGM_OPERAND, ra);
return -EINVAL;
}
iommu->pba = pba;
iommu->pal = pal;
iommu->g_iota = g_iota;
s390_pci_iommu_enable(iommu);
return 0;
}
void pci_dereg_ioat(S390PCIIOMMU *iommu)
{
s390_pci_iommu_disable(iommu);
iommu->pba = 0;
iommu->pal = 0;
iommu->g_iota = 0;
}
void fmb_timer_free(S390PCIBusDevice *pbdev)
{
if (pbdev->fmb_timer) {
timer_del(pbdev->fmb_timer);
timer_free(pbdev->fmb_timer);
pbdev->fmb_timer = NULL;
}
pbdev->fmb_addr = 0;
memset(&pbdev->fmb, 0, sizeof(ZpciFmb));
}
static int fmb_do_update(S390PCIBusDevice *pbdev, int offset, uint64_t val,
int len)
{
MemTxResult ret;
uint64_t dst = pbdev->fmb_addr + offset;
switch (len) {
case 8:
address_space_stq_be(&address_space_memory, dst, val,
MEMTXATTRS_UNSPECIFIED,
&ret);
break;
case 4:
address_space_stl_be(&address_space_memory, dst, val,
MEMTXATTRS_UNSPECIFIED,
&ret);
break;
case 2:
address_space_stw_be(&address_space_memory, dst, val,
MEMTXATTRS_UNSPECIFIED,
&ret);
break;
case 1:
address_space_stb(&address_space_memory, dst, val,
MEMTXATTRS_UNSPECIFIED,
&ret);
break;
default:
ret = MEMTX_ERROR;
break;
}
if (ret != MEMTX_OK) {
s390_pci_generate_error_event(ERR_EVENT_FMBA, pbdev->fh, pbdev->fid,
pbdev->fmb_addr, 0);
fmb_timer_free(pbdev);
}
return ret;
}
static void fmb_update(void *opaque)
{
S390PCIBusDevice *pbdev = opaque;
int64_t t = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
int i;
/* Update U bit */
pbdev->fmb.last_update *= 2;
pbdev->fmb.last_update |= UPDATE_U_BIT;
if (fmb_do_update(pbdev, offsetof(ZpciFmb, last_update),
pbdev->fmb.last_update,
sizeof(pbdev->fmb.last_update))) {
return;
}
/* Update FMB sample count */
if (fmb_do_update(pbdev, offsetof(ZpciFmb, sample),
pbdev->fmb.sample++,
sizeof(pbdev->fmb.sample))) {
return;
}
/* Update FMB counters */
for (i = 0; i < ZPCI_FMB_CNT_MAX; i++) {
if (fmb_do_update(pbdev, offsetof(ZpciFmb, counter[i]),
pbdev->fmb.counter[i],
sizeof(pbdev->fmb.counter[0]))) {
return;
}
}
/* Clear U bit and update the time */
pbdev->fmb.last_update = time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
pbdev->fmb.last_update *= 2;
if (fmb_do_update(pbdev, offsetof(ZpciFmb, last_update),
pbdev->fmb.last_update,
sizeof(pbdev->fmb.last_update))) {
return;
}
timer_mod(pbdev->fmb_timer, t + DEFAULT_MUI);
}
int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
uint8_t oc, dmaas;
uint32_t fh;
ZpciFib fib;
S390PCIBusDevice *pbdev;
uint64_t cc = ZPCI_PCI_LS_OK;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
oc = env->regs[r1] & 0xff;
dmaas = (env->regs[r1] >> 16) & 0xff;
fh = env->regs[r1] >> 32;
if (fiba & 0x7) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return 0;
}
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
if (!pbdev) {
DPRINTF("mpcifc no pci dev fh 0x%x\n", fh);
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
switch (pbdev->state) {
case ZPCI_FS_RESERVED:
case ZPCI_FS_STANDBY:
case ZPCI_FS_DISABLED:
case ZPCI_FS_PERMANENT_ERROR:
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
default:
break;
}
if (s390_cpu_virt_mem_read(cpu, fiba, ar, (uint8_t *)&fib, sizeof(fib))) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
if (fib.fmt != 0) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return 0;
}
switch (oc) {
case ZPCI_MOD_FC_REG_INT:
if (pbdev->summary_ind) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else if (reg_irqs(env, pbdev, fib)) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_RES_NOT_AVAIL);
}
break;
case ZPCI_MOD_FC_DEREG_INT:
if (!pbdev->summary_ind) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else {
pci_dereg_irqs(pbdev);
}
break;
case ZPCI_MOD_FC_REG_IOAT:
if (dmaas != 0) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_DMAAS_INVAL);
} else if (pbdev->iommu->enabled) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else if (reg_ioat(env, pbdev->iommu, fib, ra)) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
}
break;
case ZPCI_MOD_FC_DEREG_IOAT:
if (dmaas != 0) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_DMAAS_INVAL);
} else if (!pbdev->iommu->enabled) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else {
pci_dereg_ioat(pbdev->iommu);
}
break;
case ZPCI_MOD_FC_REREG_IOAT:
if (dmaas != 0) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_DMAAS_INVAL);
} else if (!pbdev->iommu->enabled) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else {
pci_dereg_ioat(pbdev->iommu);
if (reg_ioat(env, pbdev->iommu, fib, ra)) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
}
}
break;
case ZPCI_MOD_FC_RESET_ERROR:
switch (pbdev->state) {
case ZPCI_FS_BLOCKED:
case ZPCI_FS_ERROR:
pbdev->state = ZPCI_FS_ENABLED;
break;
default:
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
}
break;
case ZPCI_MOD_FC_RESET_BLOCK:
switch (pbdev->state) {
case ZPCI_FS_ERROR:
pbdev->state = ZPCI_FS_BLOCKED;
break;
default:
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
}
break;
case ZPCI_MOD_FC_SET_MEASURE: {
uint64_t fmb_addr = ldq_p(&fib.fmb_addr);
if (fmb_addr & FMBK_MASK) {
cc = ZPCI_PCI_LS_ERR;
s390_pci_generate_error_event(ERR_EVENT_FMBPRO, pbdev->fh,
pbdev->fid, fmb_addr, 0);
fmb_timer_free(pbdev);
break;
}
if (!fmb_addr) {
/* Stop updating FMB. */
fmb_timer_free(pbdev);
break;
}
if (!pbdev->fmb_timer) {
pbdev->fmb_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
fmb_update, pbdev);
} else if (timer_pending(pbdev->fmb_timer)) {
/* Remove pending timer to update FMB address. */
timer_del(pbdev->fmb_timer);
}
pbdev->fmb_addr = fmb_addr;
timer_mod(pbdev->fmb_timer,
qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + DEFAULT_MUI);
break;
}
default:
s390_program_interrupt(&cpu->env, PGM_OPERAND, ra);
cc = ZPCI_PCI_LS_ERR;
}
setcc(cpu, cc);
return 0;
}
int stpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
uint8_t dmaas;
uint32_t fh;
ZpciFib fib;
S390PCIBusDevice *pbdev;
uint32_t data;
uint64_t cc = ZPCI_PCI_LS_OK;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return 0;
}
fh = env->regs[r1] >> 32;
dmaas = (env->regs[r1] >> 16) & 0xff;
if (dmaas) {
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_STPCIFC_ST_INVAL_DMAAS);
return 0;
}
if (fiba & 0x7) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return 0;
}
pbdev = s390_pci_find_dev_by_idx(s390_get_phb(), fh & FH_MASK_INDEX);
if (!pbdev) {
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
memset(&fib, 0, sizeof(fib));
switch (pbdev->state) {
case ZPCI_FS_RESERVED:
case ZPCI_FS_STANDBY:
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
case ZPCI_FS_DISABLED:
if (fh & FH_MASK_ENABLE) {
setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
return 0;
}
goto out;
/* BLOCKED bit is set to one coincident with the setting of ERROR bit.
* FH Enabled bit is set to one in states of ENABLED, BLOCKED or ERROR. */
case ZPCI_FS_ERROR:
fib.fc |= 0x20;
/* fallthrough */
case ZPCI_FS_BLOCKED:
fib.fc |= 0x40;
/* fallthrough */
case ZPCI_FS_ENABLED:
fib.fc |= 0x80;
if (pbdev->iommu->enabled) {
fib.fc |= 0x10;
}
if (!(fh & FH_MASK_ENABLE)) {
env->regs[r1] |= 1ULL << 63;
}
break;
case ZPCI_FS_PERMANENT_ERROR:
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r1, ZPCI_STPCIFC_ST_PERM_ERROR);
return 0;
}
stq_p(&fib.pba, pbdev->iommu->pba);
stq_p(&fib.pal, pbdev->iommu->pal);
stq_p(&fib.iota, pbdev->iommu->g_iota);
stq_p(&fib.aibv, pbdev->routes.adapter.ind_addr);
stq_p(&fib.aisb, pbdev->routes.adapter.summary_addr);
stq_p(&fib.fmb_addr, pbdev->fmb_addr);
data = ((uint32_t)pbdev->isc << 28) | ((uint32_t)pbdev->noi << 16) |
((uint32_t)pbdev->routes.adapter.ind_offset << 8) |
((uint32_t)pbdev->sum << 7) | pbdev->routes.adapter.summary_offset;
stl_p(&fib.data, data);
out:
if (s390_cpu_virt_mem_write(cpu, fiba, ar, (uint8_t *)&fib, sizeof(fib))) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
setcc(cpu, cc);
return 0;
}
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