static inline int _eq0_irq_port_event(struct rhea_eq0 *eq0,
unsigned int pport_nr)
{
int rc;
int i;
int link_state;
rhea_debug("pport state change: %u", pport_nr + 1);
/* handle with the state change in the system */
link_state = rhea_pport_link_state_get(pport_nr);
if (0 > link_state) {
rhea_error("Was not able to change the state of the channel");
rc = link_state;
goto out;
}
rc = rhea_pport_err_reset(pport_nr);
if (rc)
rhea_error("Could not reset uaelog for pport: %u",
pport_nr + 1);
rhea_debug("Found state change in pport[%u] to %u",
pport_nr + 1, link_state);
/* let the rest know what happened */
for (i = 0; i < HEA_MAX_PPORT_CHANNEL_COUNT; ++i) {
hea_pport_link_state_callback_t callback =
eq0->pport_state_change[pport_nr][i].fkt_ptr;
/* check for registered call-backs */
if (callback) {
void *args;
args = eq0->pport_state_change[pport_nr][i].args;
/* execute callback */
rc = (*callback)(pport_nr, link_state, args);
if (rc) {
rhea_error("Error when dealing with "
"link state change");
goto out;
}
}
}
return 0;
out:
return rc;
}
int hea_eq0_free(struct rhea_eq0 *eq0)
{
int rc;
if (NULL == eq0) {
rhea_error("Invalid parameters passed in");
return -EINVAL;
}
rhea_debug("Clean EQ0");
spin_lock(&eq0->lock);
/* tell handler to go away */
eq0->stop = 1;
rc = rhea_eq_destroy(eq0->eq);
if (rc)
rhea_error("Could not free EQ0");
/* wait for work queue to finish */
if (eq0->irq_workqueue) {
cancel_delayed_work(&eq0->irq_work);
flush_workqueue(eq0->irq_workqueue);
/* delete queue */
destroy_workqueue(eq0->irq_workqueue);
eq0->irq_workqueue = NULL;
}
del_timer_sync(&eq0->timer);
memset(eq0, 0, sizeof(*eq0));
return rc;
}
irqreturn_t eq0_irq_handler(int irq, void *args)
{
struct rhea_eq0 *eq0;
rhea_debug("EQ0 IRQ Handler started for IRQ: %i", irq);
if (NULL == args)
return IRQ_NONE;
eq0 = (struct rhea_eq0 *) args;
while (queue_delayed_work(eq0->irq_workqueue, &eq0->irq_work, 0))
;
rhea_debug("Leaving EQ0 IRQ Handler for IRQ: %i", irq);
return IRQ_HANDLED;
}
static int _rhea_tcam_set(struct rhea_channel *channel,
unsigned tcam_base, unsigned tcam_offset,
unsigned qpn_offset,
unsigned pattern, unsigned mask)
{
int rc = 0;
unsigned tcam_bits;
struct rhea_pport *pport;
struct rhea_channel_resource_map *map_qpn = NULL;
if (NULL == channel)
return -EINVAL;
pport = _rhea_pport_get(channel->pport_nr);
if (NULL == pport) {
rhea_error("Invalid pport number");
return -EINVAL;
}
if (NULL == channel->qpn) {
rhea_error("QPN not not allocated!");
return -EINVAL;
}
if (NULL == channel->tcam) {
rhea_error("TCAM not not allocated!");
return -EINVAL;
}
rhea_debug("Set TCAM slot: %u and channel: %u of pport: "
"%u for QPN slot: %u",
tcam_base + tcam_offset, channel->type,
channel->pport_nr + 1,
channel->qpn_base + qpn_offset);
map_qpn = _rhea_channel_resource_map_get(channel->qpn,
channel->qpn_base);
if (NULL == map_qpn) {
rhea_error("Was not able to find the QPN map");
return -EINVAL;
}
rc = _rhea_tcam_register_set(channel, tcam_base, tcam_offset,
qpn_offset, pattern, mask);
if (rc) {
rhea_error("Was not able to set TCAM registers");
return rc;
}
/* get number of bits used by qpn alloc */
tcam_bits = map_qpn->bits;
_rhea_tcam_channel_register_set(channel, tcam_bits);
return rc;
}
int rhea_hasher_set(struct rhea_channel *channel, u64 sc,
u64 mask0, u64 mask1)
{
int rc = 0;
unsigned hash_bits = 0;
struct rhea_pport *pport = NULL;
struct rhea_channel_resource_map *map_qpn = NULL;
if (NULL == channel)
return -EINVAL;
/* always get pport from channel */
pport = _rhea_pport_get(channel->pport_nr);
if (NULL == pport) {
rhea_error("Invalid pport number");
return -EINVAL;
}
if (NULL == channel->qpn) {
rhea_error("Only the main channel ID can set the hasher");
return -EINVAL;
}
spin_lock(&pport->lock);
/* set registers */
out_be64(&pport->pport_regs->bpfc.pg_hashm[0], mask0);
out_be64(&pport->pport_regs->bpfc.pg_hashm[1], mask1);
out_be64(&pport->pport_regs->bpfc.pg_hashsc, sc);
/* save the values */
pport->hasher->mask0 = mask0;
pport->hasher->mask1 = mask1;
pport->hasher->sc = sc;
map_qpn =
_rhea_channel_resource_map_get(channel->qpn,
channel->qpn_base);
if (NULL == map_qpn) {
rhea_error("Was not able to find the QPN map");
return -EINVAL;
}
/* get number of bits used by qpn alloc */
hash_bits = map_qpn->bits;
rhea_debug("Hash bits: %u", hash_bits);
/* sets the bits for the hasher */
_rhea_hasher_channel_register_set(channel, hash_bits);
spin_unlock(&pport->lock);
return rc;
}
static void hea_eq0_timer_pport_event(struct work_struct *work)
{
int pport_nr;
int link_state;
struct rhea_eq0 *eq0;
if (NULL == work)
return;
eq0 = container_of(work, struct rhea_eq0, timer_work);
if (NULL == eq0)
return;
while (!spin_trylock(&eq0->lock)) {
if (0 != __sync_add_and_fetch(&eq0->stop, 0))
return;
}
if (0 != __sync_add_and_fetch(&eq0->stop, 0)) {
spin_unlock(&eq0->lock);
return;
}
for (pport_nr = 0; pport_nr < 2; ++pport_nr) {
/* get link state */
link_state = rhea_pport_link_state_get(pport_nr);
if (0 > link_state) {
rhea_error("Was not able to get the state "
"of the pport: %u", pport_nr + 1);
goto out;
}
/* check for a new state, if one has been found --> act */
if (link_state != eq0->link_state[pport_nr]) {
rhea_debug("Found different link state");
/* get new state */
eq0->link_state[pport_nr] = link_state;
/* handle port event */
_eq0_irq_port_event(eq0, pport_nr);
}
/* schedule next timer */
if (likely(0 == eq0->stop)) {
mod_timer(&eq0->timer,
jiffies +
msecs_to_jiffies(CONFIG_POWEREN_RHEA_TIMER_MS));
}
}
out:
spin_unlock(&eq0->lock);
}
int hea_eq0_alloc(struct rhea_eq0 *eq0, struct hea_adapter *ap)
{
int rc;
struct hea_eq_context context_eq;
struct hea_process process = { 0 };
if (NULL == eq0) {
rhea_error("Invalid parameters passed in");
return -EINVAL;
}
rhea_debug("Create EQ0 for hypervisor");
context_eq.cfg.eqe_count = 16;
context_eq.cfg.coalesing2_delay = HEA_EQ_COALESING_DELAY_0;
context_eq.cfg.generate_completion_events =
HEA_EQ_GEN_COM_EVENT_DISABLE;
context_eq.cfg.irq_type = HEA_IRQ_COALESING_2;
/* make sure we create a real EQ0 */
process.lpar = 0xFF;
eq0->eq = rhea_eq_create(&process, &context_eq.cfg);
if (NULL == eq0->eq) {
rhea_error("Was not able to allocate EQ0");
return -ENOMEM;
}
/* make sure that this EQ is released again */
if (0 != eq0->eq->id) {
rhea_error("Was not able to get EQ0");
rhea_eq_destroy(eq0->eq);
return -EPERM;
}
/* set base information */
eq0->q.q_begin = (unsigned char *) eq0->eq->q.va;
eq0->q.qe_size = sizeof(struct hea_eqe);
eq0->q.qe_count = eq0->eq->q.size / sizeof(struct hea_eqe);
/* initialise rest */
heaq_init(&eq0->q);
eq0->irq_workqueue = create_singlethread_workqueue("EQ0");
if (NULL == eq0->irq_workqueue) {
rhea_error("Was not able to allocate workqueue");
return -ENOMEM;
}
/* prepare work queue */
INIT_DELAYED_WORK(&eq0->irq_work, &eq0_scan_eq);
PREPARE_DELAYED_WORK(&eq0->irq_work, &eq0_scan_eq);
INIT_WORK(&eq0->timer_work, &hea_eq0_timer_pport_event);
PREPARE_WORK(&eq0->timer_work, &hea_eq0_timer_pport_event);
/* timer */
setup_timer(&eq0->timer,
hea_eq0_timer_callback, (ulong) eq0);
rc = mod_timer(&eq0->timer,
jiffies +
msecs_to_jiffies(CONFIG_POWEREN_RHEA_TIMER_MS));
if (rc) {
rhea_error("Error in mod_timer");
goto out;
}
rc = rhea_interrupts_setup(eq0->eq, ap->name, ap->hwirq_base,
ap->hwirq_count, eq0_irq_handler, eq0);
if (rc) {
rhea_error("Was not able to register interupt "
"handler for EQ0");
goto out;
}
spin_lock_init(&eq0->lock);
return 0;
out:
if (eq0->eq)
rhea_eq_destroy(eq0->eq);
if (eq0->irq_workqueue)
destroy_workqueue(eq0->irq_workqueue);
del_timer(&eq0->timer);
return rc;
}
static void eq0_scan_eq(struct work_struct *work)
{
int rc = 0;
int error_count = 0;
struct rhea_eq0 *eq0;
struct hea_eqe *eqe_current;
const unsigned int sig_nr = SIGTERM;
struct delayed_work *delayed_work;
if (NULL == work)
return;
delayed_work = to_delayed_work(work);
eq0 = container_of(delayed_work, struct rhea_eq0, irq_work);
if (NULL == eq0)
return;
while (!spin_trylock(&eq0->lock)) {
if (0 != __sync_add_and_fetch(&eq0->stop, 0))
return;
}
if (0 != __sync_add_and_fetch(&eq0->stop, 0)) {
spin_unlock(&eq0->lock);
return;
}
/* get current eqe */
eqe_current = eq0->q.qe_current;
if (NULL == eqe_current)
return;
rhea_debug("event 0x%016llx", eqe_current->eqe);
while (hea_eqe_is_valid(eqe_current)) {
rhea_debug(" event 0x%016llx", eqe_current->eqe);
switch (hea_eqe_event_type(eqe_current)) {
case HEA_EQE_ET_PORT_EVENT:
{
/* get physical port number */
int pport_nr =
hea_eqe_pport_number(eqe_current) - 1;
/* handle the port event */
rc = _eq0_irq_port_event(eq0, pport_nr);
if (rc) {
++error_count;
goto MARKER_NEXT_QE;
}
}
break;
case HEA_EQE_ET_QP_ERROR:
case HEA_EQE_ET_QP_ERROR_EQ0:
{
struct rhea_qp *qp;
unsigned int qp_id;
qp_id = hea_eqe_qp_number(eqe_current);
qp = _rhea_qp_get(qp_id);
if (NULL == qp)
continue;
if (qp->process.pid) {
eq0_signal_send(&qp->process, sig_nr);
} else {
rhea_error("Found QP error in QP %u "
" which could not be "
"dealt with.", qp_id);
BUG_ON(1);
}
}
break;
case HEA_EQE_ET_CQ_ERROR:
case HEA_EQE_ET_CQ_ERROR_EQ0:
{
struct rhea_cq *cq;
unsigned int cq_id;
cq_id = hea_eqe_cq_number(eqe_current);
cq = _rhea_cq_get(cq_id);
if (NULL == cq)
continue;
if (cq->process.pid)
eq0_signal_send(&cq->process, sig_nr);
else {
rhea_error("Found CQ error in CQ %u"
" which could not be "
"dealt with.", cq_id);
BUG_ON(1);
}
}
break;
case HEA_EQE_ET_EQ_ERROR:
{
struct rhea_eq *eq;
unsigned int eq_id;
eq_id = hea_eqe_eq_number(eqe_current);
eq = _rhea_eq_get(eq_id);
if (NULL == eq)
continue;
if (eq->process.pid) {
eq0_signal_send(&eq->process, sig_nr);
} else {
rhea_error("Found EQ error in EQ %u"
" which could not be "
"dealt with.", eq_id);
BUG_ON(1);
}
}
break;
case HEA_EQE_ET_QP_WARNING:
case HEA_EQE_ET_CP_WARNING:
case HEA_EQE_ET_FIRST_ERROR_CAPTURE_INFO:
case HEA_EQE_ET_COP_CQ_ACCESS_ERROR:
case HEA_EQE_ET_COP_QP_ACCESS_ERROR:
case HEA_EQE_ET_COP_TICKET_ACCESS_ERROR:
case HEA_EQE_ET_COP_TICKET_ERROR:
case HEA_EQE_ET_COP_DATA_ERROR:
default:
rhea_error("EQ was called and I don't know why: %i",
hea_eqe_event_type(eqe_current));
BUG_ON(1);
break;
}
MARKER_NEXT_QE:
eqe_current->eqe = 0;
heaq_set_next_qe(&eq0->q);
eqe_current = eq0->q.qe_current;
}
spin_unlock(&eq0->lock);
return;
}
