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qemu/hw/ppc/vof.c

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/*
* QEMU PowerPC Virtual Open Firmware.
*
* This implements client interface from OpenFirmware IEEE1275 on the QEMU
* side to leave only a very basic firmware in the VM.
*
* Copyright (c) 2021 IBM Corporation.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/timer.h"
#include "qemu/range.h"
#include "qemu/units.h"
#include "qemu/log.h"
#include "qapi/error.h"
#include "exec/address-spaces.h"
#include "hw/ppc/vof.h"
#include "hw/ppc/fdt.h"
#include "sysemu/runstate.h"
#include "qom/qom-qobject.h"
#include "trace.h"
#include <libfdt.h>
/*
* OF 1275 "nextprop" description suggests is it 32 bytes max but
* LoPAPR defines "ibm,query-interrupt-source-number" which is 33 chars long.
*/
#define OF_PROPNAME_LEN_MAX 64
#define VOF_MAX_PATH 256
#define VOF_MAX_SETPROPLEN 2048
#define VOF_MAX_METHODLEN 256
#define VOF_MAX_FORTHCODE 256
#define VOF_VTY_BUF_SIZE 256
typedef struct {
uint64_t start;
uint64_t size;
} OfClaimed;
typedef struct {
char *path; /* the path used to open the instance */
uint32_t phandle;
} OfInstance;
static int readstr(hwaddr pa, char *buf, int size)
{
if (VOF_MEM_READ(pa, buf, size) != MEMTX_OK) {
return -1;
}
if (strnlen(buf, size) == size) {
buf[size - 1] = '\0';
trace_vof_error_str_truncated(buf, size);
return -1;
}
return 0;
}
static bool cmpservice(const char *s, unsigned nargs, unsigned nret,
const char *s1, unsigned nargscheck, unsigned nretcheck)
{
if (strcmp(s, s1)) {
return false;
}
if ((nargscheck && (nargs != nargscheck)) ||
(nretcheck && (nret != nretcheck))) {
trace_vof_error_param(s, nargscheck, nretcheck, nargs, nret);
return false;
}
return true;
}
static void prop_format(char *tval, int tlen, const void *prop, int len)
{
int i;
const unsigned char *c;
char *t;
const char bin[] = "...";
for (i = 0, c = prop; i < len; ++i, ++c) {
if (*c == '\0' && i == len - 1) {
strncpy(tval, prop, tlen - 1);
return;
}
if (*c < 0x20 || *c >= 0x80) {
break;
}
}
for (i = 0, c = prop, t = tval; i < len; ++i, ++c) {
if (t >= tval + tlen - sizeof(bin) - 1 - 2 - 1) {
strcpy(t, bin);
return;
}
if (i && i % 4 == 0 && i != len - 1) {
strcat(t, " ");
++t;
}
t += sprintf(t, "%02X", *c & 0xFF);
}
}
static int get_path(const void *fdt, int offset, char *buf, int len)
{
int ret;
ret = fdt_get_path(fdt, offset, buf, len - 1);
if (ret < 0) {
return ret;
}
buf[len - 1] = '\0';
return strlen(buf) + 1;
}
static int phandle_to_path(const void *fdt, uint32_t ph, char *buf, int len)
{
int ret;
ret = fdt_node_offset_by_phandle(fdt, ph);
if (ret < 0) {
return ret;
}
return get_path(fdt, ret, buf, len);
}
static int path_offset(const void *fdt, const char *path)
{
g_autofree char *p = NULL;
char *at;
/*
* https://www.devicetree.org/open-firmware/bindings/ppc/release/ppc-2_1.html#HDR16
*
* "Conversion from numeric representation to text representation shall use
* the lower case forms of the hexadecimal digits in the range a..f,
* suppressing leading zeros".
*/
p = g_strdup(path);
for (at = strchr(p, '@'); at && *at; ) {
if (*at == '/') {
at = strchr(at, '@');
} else {
*at = tolower(*at);
++at;
}
}
return fdt_path_offset(fdt, p);
}
static uint32_t vof_finddevice(const void *fdt, uint32_t nodeaddr)
{
char fullnode[VOF_MAX_PATH];
uint32_t ret = PROM_ERROR;
int offset;
if (readstr(nodeaddr, fullnode, sizeof(fullnode))) {
return (uint32_t) ret;
}
offset = path_offset(fdt, fullnode);
if (offset >= 0) {
ret = fdt_get_phandle(fdt, offset);
}
trace_vof_finddevice(fullnode, ret);
return ret;
}
static const void *getprop(const void *fdt, int nodeoff, const char *propname,
int *proplen, bool *write0)
{
const char *unit, *prop;
const void *ret = fdt_getprop(fdt, nodeoff, propname, proplen);
if (ret) {
if (write0) {
*write0 = false;
}
return ret;
}
if (strcmp(propname, "name")) {
return NULL;
}
/*
* We return a value for "name" from path if queried but property does not
* exist. @proplen does not include the unit part in this case.
*/
prop = fdt_get_name(fdt, nodeoff, proplen);
if (!prop) {
*proplen = 0;
return NULL;
}
unit = memchr(prop, '@', *proplen);
if (unit) {
*proplen = unit - prop;
}
*proplen += 1;
/*
* Since it might be cut at "@" and there will be no trailing zero
* in the prop buffer, tell the caller to write zero at the end.
*/
if (write0) {
*write0 = true;
}
return prop;
}
static uint32_t vof_getprop(const void *fdt, uint32_t nodeph, uint32_t pname,
uint32_t valaddr, uint32_t vallen)
{
char propname[OF_PROPNAME_LEN_MAX + 1];
uint32_t ret = 0;
int proplen = 0;
const void *prop;
char trval[64] = "";
int nodeoff = fdt_node_offset_by_phandle(fdt, nodeph);
bool write0;
if (nodeoff < 0) {
return PROM_ERROR;
}
if (readstr(pname, propname, sizeof(propname))) {
return PROM_ERROR;
}
prop = getprop(fdt, nodeoff, propname, &proplen, &write0);
if (prop) {
const char zero = 0;
int cb = MIN(proplen, vallen);
if (VOF_MEM_WRITE(valaddr, prop, cb) != MEMTX_OK ||
/* if that was "name" with a unit address, overwrite '@' with '0' */
(write0 &&
cb == proplen &&
VOF_MEM_WRITE(valaddr + cb - 1, &zero, 1) != MEMTX_OK)) {
ret = PROM_ERROR;
} else {
/*
* OF1275 says:
* "Size is either the actual size of the property, or -1 if name
* does not exist", hence returning proplen instead of cb.
*/
ret = proplen;
/* Do not format a value if tracepoint is silent, for performance */
if (trace_event_get_state(TRACE_VOF_GETPROP) &&
qemu_loglevel_mask(LOG_TRACE)) {
prop_format(trval, sizeof(trval), prop, ret);
}
}
} else {
ret = PROM_ERROR;
}
trace_vof_getprop(nodeph, propname, ret, trval);
return ret;
}
static uint32_t vof_getproplen(const void *fdt, uint32_t nodeph, uint32_t pname)
{
char propname[OF_PROPNAME_LEN_MAX + 1];
uint32_t ret = 0;
int proplen = 0;
const void *prop;
int nodeoff = fdt_node_offset_by_phandle(fdt, nodeph);
if (nodeoff < 0) {
return PROM_ERROR;
}
if (readstr(pname, propname, sizeof(propname))) {
return PROM_ERROR;
}
prop = getprop(fdt, nodeoff, propname, &proplen, NULL);
if (prop) {
ret = proplen;
} else {
ret = PROM_ERROR;
}
trace_vof_getproplen(nodeph, propname, ret);
return ret;
}
static uint32_t vof_setprop(MachineState *ms, void *fdt, Vof *vof,
uint32_t nodeph, uint32_t pname,
uint32_t valaddr, uint32_t vallen)
{
char propname[OF_PROPNAME_LEN_MAX + 1];
uint32_t ret = PROM_ERROR;
int offset, rc;
char trval[64] = "";
char nodepath[VOF_MAX_PATH] = "";
Object *vmo = object_dynamic_cast(OBJECT(ms), TYPE_VOF_MACHINE_IF);
VofMachineIfClass *vmc;
g_autofree char *val = NULL;
if (vallen > VOF_MAX_SETPROPLEN) {
goto trace_exit;
}
if (readstr(pname, propname, sizeof(propname))) {
goto trace_exit;
}
offset = fdt_node_offset_by_phandle(fdt, nodeph);
if (offset < 0) {
goto trace_exit;
}
rc = get_path(fdt, offset, nodepath, sizeof(nodepath));
if (rc <= 0) {
goto trace_exit;
}
val = g_malloc0(vallen);
if (VOF_MEM_READ(valaddr, val, vallen) != MEMTX_OK) {
goto trace_exit;
}
if (!vmo) {
goto trace_exit;
}
vmc = VOF_MACHINE_GET_CLASS(vmo);
if (!vmc->setprop || !vmc->setprop(ms, nodepath, propname, val, vallen)) {
goto trace_exit;
}
rc = fdt_setprop(fdt, offset, propname, val, vallen);
if (rc) {
goto trace_exit;
}
if (trace_event_get_state(TRACE_VOF_SETPROP) &&
qemu_loglevel_mask(LOG_TRACE)) {
prop_format(trval, sizeof(trval), val, vallen);
}
ret = vallen;
trace_exit:
trace_vof_setprop(nodeph, propname, trval, vallen, ret);
return ret;
}
static uint32_t vof_nextprop(const void *fdt, uint32_t phandle,
uint32_t prevaddr, uint32_t nameaddr)
{
int offset, nodeoff = fdt_node_offset_by_phandle(fdt, phandle);
char prev[OF_PROPNAME_LEN_MAX + 1];
const char *tmp;
if (readstr(prevaddr, prev, sizeof(prev))) {
return PROM_ERROR;
}
fdt_for_each_property_offset(offset, fdt, nodeoff) {
if (!fdt_getprop_by_offset(fdt, offset, &tmp, NULL)) {
return 0;
}
if (prev[0] == '\0' || strcmp(prev, tmp) == 0) {
if (prev[0] != '\0') {
offset = fdt_next_property_offset(fdt, offset);
if (offset < 0) {
return 0;
}
}
if (!fdt_getprop_by_offset(fdt, offset, &tmp, NULL)) {
return 0;
}
if (VOF_MEM_WRITE(nameaddr, tmp, strlen(tmp) + 1) != MEMTX_OK) {
return PROM_ERROR;
}
return 1;
}
}
return 0;
}
static uint32_t vof_peer(const void *fdt, uint32_t phandle)
{
uint32_t ret = 0;
int rc;
if (phandle == 0) {
rc = fdt_path_offset(fdt, "/");
} else {
rc = fdt_next_subnode(fdt, fdt_node_offset_by_phandle(fdt, phandle));
}
if (rc >= 0) {
ret = fdt_get_phandle(fdt, rc);
}
return ret;
}
static uint32_t vof_child(const void *fdt, uint32_t phandle)
{
uint32_t ret = 0;
int rc = fdt_first_subnode(fdt, fdt_node_offset_by_phandle(fdt, phandle));
if (rc >= 0) {
ret = fdt_get_phandle(fdt, rc);
}
return ret;
}
static uint32_t vof_parent(const void *fdt, uint32_t phandle)
{
uint32_t ret = 0;
int rc = fdt_parent_offset(fdt, fdt_node_offset_by_phandle(fdt, phandle));
if (rc >= 0) {
ret = fdt_get_phandle(fdt, rc);
}
return ret;
}
static uint32_t vof_do_open(void *fdt, Vof *vof, int offset, const char *path)
{
uint32_t ret = PROM_ERROR;
OfInstance *inst = NULL;
if (vof->of_instance_last == 0xFFFFFFFF) {
/* We do not recycle ihandles yet */
goto trace_exit;
}
inst = g_new0(OfInstance, 1);
inst->phandle = fdt_get_phandle(fdt, offset);
g_assert(inst->phandle);
++vof->of_instance_last;
inst->path = g_strdup(path);
g_hash_table_insert(vof->of_instances,
GINT_TO_POINTER(vof->of_instance_last),
inst);
ret = vof->of_instance_last;
trace_exit:
trace_vof_open(path, inst ? inst->phandle : 0, ret);
return ret;
}
uint32_t vof_client_open_store(void *fdt, Vof *vof, const char *nodename,
const char *prop, const char *path)
{
int offset, node = fdt_path_offset(fdt, nodename);
uint32_t inst;
offset = fdt_path_offset(fdt, path);
if (offset < 0) {
trace_vof_error_unknown_path(path);
return PROM_ERROR;
}
inst = vof_do_open(fdt, vof, offset, path);
return fdt_setprop_cell(fdt, node, prop, inst) >= 0 ? 0 : PROM_ERROR;
}
static uint32_t vof_open(void *fdt, Vof *vof, uint32_t pathaddr)
{
char path[VOF_MAX_PATH];
int offset;
if (readstr(pathaddr, path, sizeof(path))) {
return PROM_ERROR;
}
offset = path_offset(fdt, path);
if (offset < 0) {
trace_vof_error_unknown_path(path);
return PROM_ERROR;
}
return vof_do_open(fdt, vof, offset, path);
}
static void vof_close(Vof *vof, uint32_t ihandle)
{
if (!g_hash_table_remove(vof->of_instances, GINT_TO_POINTER(ihandle))) {
trace_vof_error_unknown_ihandle_close(ihandle);
}
}
static uint32_t vof_instance_to_package(Vof *vof, uint32_t ihandle)
{
gpointer instp = g_hash_table_lookup(vof->of_instances,
GINT_TO_POINTER(ihandle));
uint32_t ret = PROM_ERROR;
if (instp) {
ret = ((OfInstance *)instp)->phandle;
}
trace_vof_instance_to_package(ihandle, ret);
return ret;
}
static uint32_t vof_package_to_path(const void *fdt, uint32_t phandle,
uint32_t buf, uint32_t len)
{
int rc;
char tmp[VOF_MAX_PATH] = "";
rc = phandle_to_path(fdt, phandle, tmp, sizeof(tmp));
if (rc > 0) {
if (VOF_MEM_WRITE(buf, tmp, rc) != MEMTX_OK) {
rc = -1;
}
}
trace_vof_package_to_path(phandle, tmp, rc);
return rc > 0 ? (uint32_t)rc : PROM_ERROR;
}
static uint32_t vof_instance_to_path(void *fdt, Vof *vof, uint32_t ihandle,
uint32_t buf, uint32_t len)
{
int rc = -1;
uint32_t phandle = vof_instance_to_package(vof, ihandle);
char tmp[VOF_MAX_PATH] = "";
if (phandle != -1) {
rc = phandle_to_path(fdt, phandle, tmp, sizeof(tmp));
if (rc > 0) {
if (VOF_MEM_WRITE(buf, tmp, rc) != MEMTX_OK) {
rc = -1;
}
}
}
trace_vof_instance_to_path(ihandle, phandle, tmp, rc);
return rc > 0 ? (uint32_t)rc : PROM_ERROR;
}
static uint32_t vof_write(Vof *vof, uint32_t ihandle, uint32_t buf,
uint32_t len)
{
char tmp[VOF_VTY_BUF_SIZE];
unsigned cb;
OfInstance *inst = (OfInstance *)
g_hash_table_lookup(vof->of_instances, GINT_TO_POINTER(ihandle));
if (!inst) {
trace_vof_error_write(ihandle);
return PROM_ERROR;
}
for ( ; len > 0; len -= cb) {
cb = MIN(len, sizeof(tmp) - 1);
if (VOF_MEM_READ(buf, tmp, cb) != MEMTX_OK) {
return PROM_ERROR;
}
/* FIXME: there is no backend(s) yet so just call a trace */
if (trace_event_get_state(TRACE_VOF_WRITE) &&
qemu_loglevel_mask(LOG_TRACE)) {
tmp[cb] = '\0';
trace_vof_write(ihandle, cb, tmp);
}
}
return len;
}
static void vof_claimed_dump(GArray *claimed)
{
int i;
OfClaimed c;
if (trace_event_get_state(TRACE_VOF_CLAIMED) &&
qemu_loglevel_mask(LOG_TRACE)) {
for (i = 0; i < claimed->len; ++i) {
c = g_array_index(claimed, OfClaimed, i);
trace_vof_claimed(c.start, c.start + c.size, c.size);
}
}
}
static bool vof_claim_avail(GArray *claimed, uint64_t virt, uint64_t size)
{
int i;
OfClaimed c;
for (i = 0; i < claimed->len; ++i) {
c = g_array_index(claimed, OfClaimed, i);
if (ranges_overlap(c.start, c.size, virt, size)) {
return false;
}
}
return true;
}
static void vof_claim_add(GArray *claimed, uint64_t virt, uint64_t size)
{
OfClaimed newclaim;
newclaim.start = virt;
newclaim.size = size;
g_array_append_val(claimed, newclaim);
}
static gint of_claimed_compare_func(gconstpointer a, gconstpointer b)
{
return ((OfClaimed *)a)->start - ((OfClaimed *)b)->start;
}
static void vof_dt_memory_available(void *fdt, GArray *claimed, uint64_t base)
{
int i, n, offset, proplen = 0, sc, ac;
target_ulong mem0_end;
const uint8_t *mem0_reg;
g_autofree uint8_t *avail = NULL;
uint8_t *availcur;
if (!fdt || !claimed) {
return;
}
offset = fdt_path_offset(fdt, "/");
_FDT(offset);
ac = fdt_address_cells(fdt, offset);
g_assert(ac == 1 || ac == 2);
sc = fdt_size_cells(fdt, offset);
g_assert(sc == 1 || sc == 2);
offset = fdt_path_offset(fdt, "/memory@0");
_FDT(offset);
mem0_reg = fdt_getprop(fdt, offset, "reg", &proplen);
g_assert(mem0_reg && proplen == sizeof(uint32_t) * (ac + sc));
if (sc == 2) {
mem0_end = be64_to_cpu(*(uint64_t *)(mem0_reg + sizeof(uint32_t) * ac));
} else {
mem0_end = be32_to_cpu(*(uint32_t *)(mem0_reg + sizeof(uint32_t) * ac));
}
g_array_sort(claimed, of_claimed_compare_func);
vof_claimed_dump(claimed);
/*
* VOF resides in the first page so we do not need to check if there is
* available memory before the first claimed block
*/
g_assert(claimed->len && (g_array_index(claimed, OfClaimed, 0).start == 0));
avail = g_malloc0(sizeof(uint32_t) * (ac + sc) * claimed->len);
for (i = 0, n = 0, availcur = avail; i < claimed->len; ++i) {
OfClaimed c = g_array_index(claimed, OfClaimed, i);
uint64_t start, size;
start = c.start + c.size;
if (i < claimed->len - 1) {
OfClaimed cn = g_array_index(claimed, OfClaimed, i + 1);
size = cn.start - start;
} else {
size = mem0_end - start;
}
if (ac == 2) {
*(uint64_t *) availcur = cpu_to_be64(start);
} else {
*(uint32_t *) availcur = cpu_to_be32(start);
}
availcur += sizeof(uint32_t) * ac;
if (sc == 2) {
*(uint64_t *) availcur = cpu_to_be64(size);
} else {
*(uint32_t *) availcur = cpu_to_be32(size);
}
availcur += sizeof(uint32_t) * sc;
if (size) {
trace_vof_avail(c.start + c.size, c.start + c.size + size, size);
++n;
}
}
_FDT((fdt_setprop(fdt, offset, "available", avail, availcur - avail)));
}
/*
* OF1275:
* "Allocates size bytes of memory. If align is zero, the allocated range
* begins at the virtual address virt. Otherwise, an aligned address is
* automatically chosen and the input argument virt is ignored".
*
* In other words, exactly one of @virt and @align is non-zero.
*/
uint64_t vof_claim(Vof *vof, uint64_t virt, uint64_t size,
uint64_t align)
{
uint64_t ret;
if (size == 0) {
ret = -1;
} else if (align == 0) {
if (!vof_claim_avail(vof->claimed, virt, size)) {
ret = -1;
} else {
ret = virt;
}
} else {
vof->claimed_base = QEMU_ALIGN_UP(vof->claimed_base, align);
while (1) {
if (vof->claimed_base >= vof->top_addr) {
error_report("Out of RMA memory for the OF client");
return -1;
}
if (vof_claim_avail(vof->claimed, vof->claimed_base, size)) {
break;
}
vof->claimed_base += size;
}
ret = vof->claimed_base;
}
if (ret != -1) {
vof->claimed_base = MAX(vof->claimed_base, ret + size);
vof_claim_add(vof->claimed, ret, size);
}
trace_vof_claim(virt, size, align, ret);
return ret;
}
static uint32_t vof_release(Vof *vof, uint64_t virt, uint64_t size)
{
uint32_t ret = PROM_ERROR;
int i;
GArray *claimed = vof->claimed;
OfClaimed c;
for (i = 0; i < claimed->len; ++i) {
c = g_array_index(claimed, OfClaimed, i);
if (c.start == virt && c.size == size) {
g_array_remove_index(claimed, i);
ret = 0;
break;
}
}
trace_vof_release(virt, size, ret);
return ret;
}
static void vof_instantiate_rtas(Error **errp)
{
error_setg(errp, "The firmware should have instantiated RTAS");
}
static uint32_t vof_call_method(MachineState *ms, Vof *vof, uint32_t methodaddr,
uint32_t ihandle, uint32_t param1,
uint32_t param2, uint32_t param3,
uint32_t param4, uint32_t *ret2)
{
uint32_t ret = PROM_ERROR;
char method[VOF_MAX_METHODLEN] = "";
OfInstance *inst;
if (!ihandle) {
goto trace_exit;
}
inst = (OfInstance *)g_hash_table_lookup(vof->of_instances,
GINT_TO_POINTER(ihandle));
if (!inst) {
goto trace_exit;
}
if (readstr(methodaddr, method, sizeof(method))) {
goto trace_exit;
}
if (strcmp(inst->path, "/") == 0) {
if (strcmp(method, "ibm,client-architecture-support") == 0) {
Object *vmo = object_dynamic_cast(OBJECT(ms), TYPE_VOF_MACHINE_IF);
if (vmo) {
VofMachineIfClass *vmc = VOF_MACHINE_GET_CLASS(vmo);
g_assert(vmc->client_architecture_support);
ret = (uint32_t)vmc->client_architecture_support(ms, first_cpu,
param1);
}
*ret2 = 0;
}
} else if (strcmp(inst->path, "/rtas") == 0) {
if (strcmp(method, "instantiate-rtas") == 0) {
vof_instantiate_rtas(&error_fatal);
ret = 0;
*ret2 = param1; /* rtas-base */
}
} else {
trace_vof_error_unknown_method(method);
}
trace_exit:
trace_vof_method(ihandle, method, param1, ret, *ret2);
return ret;
}
static uint32_t vof_call_interpret(uint32_t cmdaddr, uint32_t param1,
uint32_t param2, uint32_t *ret2)
{
uint32_t ret = PROM_ERROR;
char cmd[VOF_MAX_FORTHCODE] = "";
/* No interpret implemented so just call a trace */
readstr(cmdaddr, cmd, sizeof(cmd));
trace_vof_interpret(cmd, param1, param2, ret, *ret2);
return ret;
}
static void vof_quiesce(MachineState *ms, void *fdt, Vof *vof)
{
Object *vmo = object_dynamic_cast(OBJECT(ms), TYPE_VOF_MACHINE_IF);
/* After "quiesce", no change is expected to the FDT, pack FDT to ensure */
int rc = fdt_pack(fdt);
assert(rc == 0);
if (vmo) {
VofMachineIfClass *vmc = VOF_MACHINE_GET_CLASS(vmo);
if (vmc->quiesce) {
vmc->quiesce(ms);
}
}
vof_claimed_dump(vof->claimed);
}
static uint32_t vof_client_handle(MachineState *ms, void *fdt, Vof *vof,
const char *service,
uint32_t *args, unsigned nargs,
uint32_t *rets, unsigned nrets)
{
uint32_t ret = 0;
/* @nrets includes the value which this function returns */
#define cmpserv(s, a, r) \
cmpservice(service, nargs, nrets, (s), (a), (r))
if (cmpserv("finddevice", 1, 1)) {
ret = vof_finddevice(fdt, args[0]);
} else if (cmpserv("getprop", 4, 1)) {
ret = vof_getprop(fdt, args[0], args[1], args[2], args[3]);
} else if (cmpserv("getproplen", 2, 1)) {
ret = vof_getproplen(fdt, args[0], args[1]);
} else if (cmpserv("setprop", 4, 1)) {
ret = vof_setprop(ms, fdt, vof, args[0], args[1], args[2], args[3]);
} else if (cmpserv("nextprop", 3, 1)) {
ret = vof_nextprop(fdt, args[0], args[1], args[2]);
} else if (cmpserv("peer", 1, 1)) {
ret = vof_peer(fdt, args[0]);
} else if (cmpserv("child", 1, 1)) {
ret = vof_child(fdt, args[0]);
} else if (cmpserv("parent", 1, 1)) {
ret = vof_parent(fdt, args[0]);
} else if (cmpserv("open", 1, 1)) {
ret = vof_open(fdt, vof, args[0]);
} else if (cmpserv("close", 1, 0)) {
vof_close(vof, args[0]);
} else if (cmpserv("instance-to-package", 1, 1)) {
ret = vof_instance_to_package(vof, args[0]);
} else if (cmpserv("package-to-path", 3, 1)) {
ret = vof_package_to_path(fdt, args[0], args[1], args[2]);
} else if (cmpserv("instance-to-path", 3, 1)) {
ret = vof_instance_to_path(fdt, vof, args[0], args[1], args[2]);
} else if (cmpserv("write", 3, 1)) {
ret = vof_write(vof, args[0], args[1], args[2]);
} else if (cmpserv("claim", 3, 1)) {
uint64_t ret64 = vof_claim(vof, args[0], args[1], args[2]);
if (ret64 < 0x100000000UL) {
vof_dt_memory_available(fdt, vof->claimed, vof->claimed_base);
ret = (uint32_t)ret64;
} else {
if (ret64 != -1) {
vof_release(vof, ret, args[1]);
}
ret = PROM_ERROR;
}
} else if (cmpserv("release", 2, 0)) {
ret = vof_release(vof, args[0], args[1]);
if (ret != PROM_ERROR) {
vof_dt_memory_available(fdt, vof->claimed, vof->claimed_base);
}
} else if (cmpserv("call-method", 0, 0)) {
ret = vof_call_method(ms, vof, args[0], args[1], args[2], args[3],
args[4], args[5], rets);
} else if (cmpserv("interpret", 0, 0)) {
ret = vof_call_interpret(args[0], args[1], args[2], rets);
} else if (cmpserv("milliseconds", 0, 1)) {
ret = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
} else if (cmpserv("quiesce", 0, 0)) {
vof_quiesce(ms, fdt, vof);
} else if (cmpserv("exit", 0, 0)) {
error_report("Stopped as the VM requested \"exit\"");
vm_stop(RUN_STATE_PAUSED);
} else {
trace_vof_error_unknown_service(service, nargs, nrets);
ret = -1;
}
#undef cmpserv
return ret;
}
/* Defined as Big Endian */
struct prom_args {
uint32_t service;
uint32_t nargs;
uint32_t nret;
uint32_t args[10];
} QEMU_PACKED;
int vof_client_call(MachineState *ms, Vof *vof, void *fdt,
target_ulong args_real)
{
struct prom_args args_be;
uint32_t args[ARRAY_SIZE(args_be.args)];
uint32_t rets[ARRAY_SIZE(args_be.args)] = { 0 }, ret;
char service[64];
unsigned nargs, nret, i;
if (VOF_MEM_READ(args_real, &args_be, sizeof(args_be)) != MEMTX_OK) {
return -EINVAL;
}
nargs = be32_to_cpu(args_be.nargs);
if (nargs >= ARRAY_SIZE(args_be.args)) {
return -EINVAL;
}
if (VOF_MEM_READ(be32_to_cpu(args_be.service), service, sizeof(service)) !=
MEMTX_OK) {
return -EINVAL;
}
if (strnlen(service, sizeof(service)) == sizeof(service)) {
/* Too long service name */
return -EINVAL;
}
for (i = 0; i < nargs; ++i) {
args[i] = be32_to_cpu(args_be.args[i]);
}
nret = be32_to_cpu(args_be.nret);
if (nret > ARRAY_SIZE(args_be.args) - nargs) {
return -EINVAL;
}
ret = vof_client_handle(ms, fdt, vof, service, args, nargs, rets, nret);
if (!nret) {
return 0;
}
/* @nrets includes the value which this function returns */
args_be.args[nargs] = cpu_to_be32(ret);
for (i = 1; i < nret; ++i) {
args_be.args[nargs + i] = cpu_to_be32(rets[i - 1]);
}
if (VOF_MEM_WRITE(args_real + offsetof(struct prom_args, args[nargs]),
args_be.args + nargs, sizeof(args_be.args[0]) * nret) !=
MEMTX_OK) {
return -EINVAL;
}
return 0;
}
static void vof_instance_free(gpointer data)
{
OfInstance *inst = (OfInstance *)data;
g_free(inst->path);
g_free(inst);
}
void vof_init(Vof *vof, uint64_t top_addr, Error **errp)
{
vof_cleanup(vof);
vof->of_instances = g_hash_table_new_full(g_direct_hash, g_direct_equal,
NULL, vof_instance_free);
vof->claimed = g_array_new(false, false, sizeof(OfClaimed));
/* Keep allocations in 32bit as CLI ABI can only return cells==32bit */
vof->top_addr = MIN(top_addr, 4 * GiB);
if (vof_claim(vof, 0, vof->fw_size, 0) == -1) {
error_setg(errp, "Memory for firmware is in use");
}
}
void vof_cleanup(Vof *vof)
{
if (vof->claimed) {
g_array_unref(vof->claimed);
}
if (vof->of_instances) {
g_hash_table_unref(vof->of_instances);
}
vof->claimed = NULL;
vof->of_instances = NULL;
}
void vof_build_dt(void *fdt, Vof *vof)
{
uint32_t phandle = fdt_get_max_phandle(fdt);
int offset, proplen = 0;
const void *prop;
/* Assign phandles to nodes without predefined phandles (like XICS/XIVE) */
for (offset = fdt_next_node(fdt, -1, NULL);
offset >= 0;
offset = fdt_next_node(fdt, offset, NULL)) {
prop = fdt_getprop(fdt, offset, "phandle", &proplen);
if (prop) {
continue;
}
++phandle;
_FDT(fdt_setprop_cell(fdt, offset, "phandle", phandle));
}
vof_dt_memory_available(fdt, vof->claimed, vof->claimed_base);
}
static const TypeInfo vof_machine_if_info = {
.name = TYPE_VOF_MACHINE_IF,
.parent = TYPE_INTERFACE,
.class_size = sizeof(VofMachineIfClass),
};
static void vof_machine_if_register_types(void)
{
type_register_static(&vof_machine_if_info);
}
type_init(vof_machine_if_register_types)
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