static void ipmi_bt_set_atn(IPMIInterface *ii, int val, int irq)
{
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
if (!!val == IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
return;
}
IPMI_BT_SET_SMS_ATN(ib->control_reg, val);
if (val) {
if (irq && ib->use_irq && ib->irqs_enabled &&
!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
qemu_irq_raise(ib->irq);
}
} else {
if (!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
qemu_irq_lower(ib->irq);
}
}
}
static void ipmi_bt_set_irq_enable(IPMIInterface *ii, int val)
{
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
ib->irqs_enabled = val;
}
static uint64_t ipmi_bt_ioport_read(void *opaque, hwaddr addr, unsigned size)
{
IPMIInterface *ii = opaque;
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
uint32_t ret = 0xff;
switch (addr & 3) {
case 0:
ret = ib->control_reg;
break;
case 1:
if (ib->outpos < ib->outlen) {
ret = ib->outmsg[ib->outpos];
ib->outpos++;
if (ib->outpos == ib->outlen) {
ib->outpos = 0;
ib->outlen = 0;
}
} else {
ret = 0xff;
}
break;
case 2:
ret = ib->mask_reg;
break;
}
return ret;
}
static void ipmi_bt_handle_rsp(IPMIInterface *ii, uint8_t msg_id,
unsigned char *rsp, unsigned int rsp_len)
{
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
if (ib->waiting_rsp == msg_id) {
ib->waiting_rsp++;
if (rsp_len > (sizeof(ib->outmsg) - 2)) {
ib->outmsg[0] = 4;
ib->outmsg[1] = rsp[0];
ib->outmsg[2] = ib->waiting_seq;
ib->outmsg[3] = rsp[1];
ib->outmsg[4] = IPMI_CC_CANNOT_RETURN_REQ_NUM_BYTES;
ib->outlen = 5;
} else {
ib->outmsg[0] = rsp_len + 1;
ib->outmsg[1] = rsp[0];
ib->outmsg[2] = ib->waiting_seq;
memcpy(ib->outmsg + 3, rsp + 1, rsp_len - 1);
ib->outlen = rsp_len + 2;
}
IPMI_BT_SET_BBUSY(ib->control_reg, 0);
IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
if (ib->use_irq && ib->irqs_enabled &&
!IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
qemu_irq_raise(ib->irq);
}
}
}
static void ipmi_bt_init(IPMIInterface *ii, Error **errp)
{
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
ib->io_length = 3;
memory_region_init_io(&ib->io, NULL, &ipmi_bt_io_ops, ii, "ipmi-bt", 3);
}
static void ipmi_bt_handle_event(IPMIInterface *ii)
{
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
if (ib->inlen < 4) {
goto out;
}
/* Note that overruns are handled by handle_command */
if (ib->inmsg[0] != (ib->inlen - 1)) {
/* Length mismatch, just ignore. */
IPMI_BT_SET_BBUSY(ib->control_reg, 1);
ib->inlen = 0;
goto out;
}
if ((ib->inmsg[1] == (IPMI_NETFN_APP << 2)) &&
(ib->inmsg[3] == IPMI_CMD_GET_BT_INTF_CAP)) {
/* We handle this one ourselves. */
ib->outmsg[0] = 9;
ib->outmsg[1] = ib->inmsg[1] | 0x04;
ib->outmsg[2] = ib->inmsg[2];
ib->outmsg[3] = ib->inmsg[3];
ib->outmsg[4] = 0;
ib->outmsg[5] = 1; /* Only support 1 outstanding request. */
if (sizeof(ib->inmsg) > 0xff) { /* Input buffer size */
ib->outmsg[6] = 0xff;
} else {
ib->outmsg[6] = (unsigned char) sizeof(ib->inmsg);
}
if (sizeof(ib->outmsg) > 0xff) { /* Output buffer size */
ib->outmsg[7] = 0xff;
} else {
ib->outmsg[7] = (unsigned char) sizeof(ib->outmsg);
}
ib->outmsg[8] = 10; /* Max request to response time */
ib->outmsg[9] = 0; /* Don't recommend retries */
ib->outlen = 10;
IPMI_BT_SET_BBUSY(ib->control_reg, 0);
IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
if (ib->use_irq && ib->irqs_enabled &&
!IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
qemu_irq_raise(ib->irq);
}
goto out;
}
ib->waiting_seq = ib->inmsg[2];
ib->inmsg[2] = ib->inmsg[1];
{
IPMIBmcClass *bk = IPMI_BMC_GET_CLASS(ib->bmc);
bk->handle_command(ib->bmc, ib->inmsg + 2, ib->inlen - 2,
sizeof(ib->inmsg), ib->waiting_rsp);
}
out:
return;
}
static void ipmi_bt_handle_reset(IPMIInterface *ii, bool is_cold)
{
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
if (is_cold) {
/* Disable the BT interrupt on reset */
if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
qemu_irq_lower(ib->irq);
}
IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
}
}
static void ipmi_bt_ioport_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
IPMIInterface *ii = opaque;
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
IPMIBT *ib = iic->get_backend_data(ii);
switch (addr & 3) {
case 0:
if (IPMI_BT_GET_CLR_WR(val)) {
ib->inlen = 0;
}
if (IPMI_BT_GET_CLR_RD(val)) {
ib->outpos = 0;
}
if (IPMI_BT_GET_B2H_ATN(val)) {
IPMI_BT_SET_B2H_ATN(ib->control_reg, 0);
}
if (IPMI_BT_GET_SMS_ATN(val)) {
IPMI_BT_SET_SMS_ATN(ib->control_reg, 0);
}
if (IPMI_BT_GET_HBUSY(val)) {
/* Toggle */
IPMI_BT_SET_HBUSY(ib->control_reg,
!IPMI_BT_GET_HBUSY(ib->control_reg));
}
if (IPMI_BT_GET_H2B_ATN(val)) {
IPMI_BT_SET_BBUSY(ib->control_reg, 1);
ipmi_bt_signal(ib, ii);
}
break;
case 1:
if (ib->inlen < sizeof(ib->inmsg)) {
ib->inmsg[ib->inlen] = val;
}
ib->inlen++;
break;
case 2:
if (IPMI_BT_GET_B2H_IRQ_EN(val) !=
IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
if (IPMI_BT_GET_B2H_IRQ_EN(val)) {
if (IPMI_BT_GET_B2H_ATN(ib->control_reg) ||
IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
qemu_irq_raise(ib->irq);
}
IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 1);
} else {
if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
qemu_irq_lower(ib->irq);
}
IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
}
}
if (IPMI_BT_GET_B2H_IRQ(val) && IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
qemu_irq_lower(ib->irq);
}
break;
}
}