void
sda_slot_handle_detect(sda_slot_t *slot)
{
uint32_t inserted;
sda_slot_enter(slot);
slot->s_stamp = ddi_get_time();
slot->s_intransit = 1;
slot->s_flags = 0;
slot->s_rca = 0;
slot->s_ready = B_FALSE;
sda_getprop(slot, SDA_PROP_INSERTED, &inserted);
slot->s_inserted = (inserted != 0);
if (slot->s_inserted && !slot->s_failed) {
/*
* We need to initialize the card, so we only support
* hipri commands for now.
*/
slot->s_init = B_TRUE;
sda_slot_exit(slot);
/*
* Card insertion occurred. We have to run this on
* another task, to avoid deadlock as the task may
* need to dispatch commands.
*/
(void) ddi_taskq_dispatch(slot->s_hp_tq, sda_slot_insert, slot,
DDI_SLEEP);
} else {
/*
* Nuke in-flight commands.
*/
sda_slot_abort(slot, SDA_ENODEV);
/*
* Restart the slot (incl. power cycle). This gets the
* slot to a known good state.
*/
sda_slot_reset(slot);
slot->s_intransit = 0;
sda_slot_exit(slot);
bd_state_change(slot->s_bdh);
}
sda_slot_wakeup(slot);
}
void
sda_slot_abort(sda_slot_t *slot, sda_err_t errno)
{
sda_cmd_t *cmdp;
ASSERT(sda_slot_owned(slot));
if ((cmdp = slot->s_xfrp) != NULL) {
slot->s_xfrp = NULL;
sda_cmd_notify(cmdp, 0, errno);
list_insert_tail(&slot->s_abortlist, cmdp);
}
while ((cmdp = list_head(&slot->s_cmdlist)) != NULL) {
list_remove(&slot->s_cmdlist, cmdp);
sda_cmd_notify(cmdp, 0, errno);
list_insert_tail(&slot->s_abortlist, cmdp);
}
sda_slot_wakeup(slot);
}
void
sda_slot_handle_transfer(sda_slot_t *slot, sda_err_t errno)
{
sda_cmd_t *cmdp;
sda_slot_enter(slot);
if ((cmdp = slot->s_xfrp) != NULL) {
slot->s_xfrp = NULL;
slot->s_xfrtmo = 0;
(void) sda_setprop(slot, SDA_PROP_LED, 0);
sda_slot_exit(slot);
sda_slot_wakeup(slot);
sda_cmd_notify(cmdp, SDA_CMDF_DAT, errno);
} else {
sda_slot_exit(slot);
}
}
void
sda_slot_abort(sda_slot_t *slot, sda_err_t errno)
{
sda_cmd_t *cmdp;
ASSERT(sda_slot_owned(slot));
if ((cmdp = slot->s_xfrp) != NULL) {
slot->s_xfrp = NULL;
sda_cmd_notify(cmdp, SDA_CMDF_BUSY | SDA_CMDF_DAT, errno);
}
while ((cmdp = list_head(&slot->s_cmdlist)) != NULL) {
list_remove(&slot->s_cmdlist, cmdp);
sda_cmd_notify(cmdp, 0, errno);
mutex_enter(&slot->s_evlock);
list_insert_tail(&slot->s_abortlist, cmdp);
mutex_exit(&slot->s_evlock);
}
sda_slot_wakeup(slot);
}
void
sda_slot_mem_reset(sda_slot_t *slot, sda_err_t errno)
{
sda_cmd_t *cmdp;
sda_slot_enter(slot);
cmdp = list_head(&slot->s_cmdlist);
while (cmdp != NULL) {
sda_cmd_t *next;
next = list_next(&slot->s_cmdlist, cmdp);
if (cmdp->sc_flags & SDA_CMDF_MEM) {
list_remove(&slot->s_cmdlist, cmdp);
sda_cmd_notify(cmdp, 0, errno);
mutex_enter(&slot->s_evlock);
list_insert_tail(&slot->s_abortlist, cmdp);
mutex_exit(&slot->s_evlock);
}
cmdp = next;
}
sda_slot_exit(slot);
/* wake up to process the abort list */
sda_slot_wakeup(slot);
}
void
sda_slot_thread(void *arg)
{
sda_slot_t *slot = arg;
for (;;) {
sda_cmd_t *cmdp;
boolean_t datline;
sda_err_t rv;
mutex_enter(&slot->s_evlock);
/*
* Process any abort list first.
*/
if ((cmdp = list_head(&slot->s_abortlist)) != NULL) {
list_remove(&slot->s_abortlist, cmdp);
mutex_exit(&slot->s_evlock);
/*
* EOK used here, to avoid clobbering previous
* error code.
*/
sda_cmd_notify(cmdp, SDA_CMDF_BUSY | SDA_CMDF_DAT,
SDA_EOK);
continue;
}
if (slot->s_detach) {
/* Parent is detaching the slot, bail out. */
break;
}
if ((slot->s_suspend) && (slot->s_xfrp == NULL)) {
/*
* Host wants to suspend, but don't do it if
* we have a transfer outstanding.
*/
break;
}
if (slot->s_detect) {
slot->s_detect = B_FALSE;
mutex_exit(&slot->s_evlock);
sda_slot_handle_detect(slot);
continue;
}
if (slot->s_xfrdone) {
sda_err_t errno;
errno = slot->s_errno;
slot->s_errno = SDA_EOK;
slot->s_xfrdone = B_FALSE;
mutex_exit(&slot->s_evlock);
sda_slot_handle_transfer(slot, errno);
continue;
}
if (slot->s_fault != SDA_FAULT_NONE) {
sda_fault_t fault;
fault = slot->s_fault;
slot->s_fault = SDA_FAULT_NONE;
mutex_exit(&slot->s_evlock);
sda_slot_handle_fault(slot, fault);
continue;
}
if (slot->s_reap) {
/*
* Do not sleep while holding the evlock. If this
* fails, we'll just try again the next cycle.
*/
(void) ddi_taskq_dispatch(slot->s_hp_tq,
sda_nexus_reap, slot, DDI_NOSLEEP);
}
if ((slot->s_xfrp != NULL) && (gethrtime() > slot->s_xfrtmo)) {
/*
* The device stalled processing the data request.
* At this point, we really have no choice but to
* nuke the request, and flag a fault.
*/
mutex_exit(&slot->s_evlock);
sda_slot_handle_transfer(slot, SDA_ETIME);
sda_slot_fault(slot, SDA_FAULT_TIMEOUT);
continue;
}
/*
* If the slot has suspended, then we can't process
* any new commands yet.
*/
if ((slot->s_suspend) || (!slot->s_wake)) {
/*
* We use a timed wait if we are waiting for a
* data transfer to complete, or if we might
* need to reap child nodes. Otherwise we
* avoid the timed wait to avoid waking CPU
* (power savings.)
*/
if ((slot->s_xfrp != NULL) || (slot->s_reap)) {
/* Wait 3 sec (reap attempts). */
(void) cv_reltimedwait(&slot->s_evcv,
&slot->s_evlock, drv_usectohz(3000000),
TR_CLOCK_TICK);
} else {
(void) cv_wait(&slot->s_evcv, &slot->s_evlock);
}
mutex_exit(&slot->s_evlock);
continue;
}
slot->s_wake = B_FALSE;
/*
* Possibly reap child nodes.
*/
if (slot->s_reap) {
slot->s_reap = B_FALSE;
mutex_exit(&slot->s_evlock);
sda_nexus_reap(slot);
} else {
mutex_exit(&slot->s_evlock);
}
/*
* We're awake now, so look for work to do. First
* acquire access to the slot.
*/
sda_slot_enter(slot);
/*
* If no more commands to process, go back to sleep.
*/
if ((cmdp = list_head(&slot->s_cmdlist)) == NULL) {
sda_slot_exit(slot);
continue;
}
/*
* If the current command is not an initialization
* command, but we are initializing, go back to sleep.
* (This happens potentially during a card reset or
* suspend/resume cycle, where the card has not been
* removed, but a reset is in progress.)
*/
if (slot->s_init && !(cmdp->sc_flags & SDA_CMDF_INIT)) {
sda_slot_exit(slot);
continue;
}
datline = ((cmdp->sc_flags & SDA_CMDF_DAT) != 0);
if (datline) {
/*
* If the current command has a data phase
* while a transfer is in progress, then go
* back to sleep.
*/
if (slot->s_xfrp != NULL) {
sda_slot_exit(slot);
continue;
}
/*
* Note that APP_CMD doesn't have a data phase,
* although the associated ACMD might.
*/
if (cmdp->sc_index != CMD_APP_CMD) {
slot->s_xfrp = cmdp;
/*
* All commands should complete in
* less than 5 seconds. The worst
* case is actually somewhere around 4
* seconds, but that is when the clock
* is only 100 kHz.
*/
slot->s_xfrtmo = gethrtime() +
5000000000ULL;
(void) sda_setprop(slot, SDA_PROP_LED, 1);
}
}
/*
* We're committed to dispatching this command now,
* so remove it from the list.
*/
list_remove(&slot->s_cmdlist, cmdp);
/*
* There could be more commands after this one, so we
* mark ourself so we stay awake for another cycle.
*/
sda_slot_wakeup(slot);
/*
* Submit the command. Note that we are holding the
* slot lock here, so it is critical that the caller
* *not* call back up into the framework. The caller
* must break context. But doing it this way prevents
* a critical race on card removal.
*
* Note that we don't resubmit memory to the device if
* it isn't flagged as ready (e.g. if the wrong device
* was inserted!)
*/
if ((!slot->s_ready) && (cmdp->sc_flags & SDA_CMDF_MEM)) {
rv = SDA_ENODEV;
if (!slot->s_warn) {
sda_slot_err(slot,
"Device removed while in use. "
"Please reinsert!");
slot->s_warn = B_TRUE;
}
} else {
rv = slot->s_ops.so_cmd(slot->s_prv, cmdp);
}
if (rv == SDA_EOK)
rv = sda_slot_check_response(cmdp);
if (rv == SDA_EOK) {
/*
* If APP_CMD completed properly, then
* resubmit with ACMD index. Note wake was
* already set above.
*/
if (cmdp->sc_index == CMD_APP_CMD) {
if ((cmdp->sc_response[0] & R1_APP_CMD) == 0) {
sda_slot_log(slot, "APP_CMD not set!");
}
sda_cmd_resubmit_acmd(slot, cmdp);
sda_slot_exit(slot);
continue;
}
} else if (datline) {
/*
* If an error occurred and we were expecting
* a transfer phase, we have to clean up.
*/
(void) sda_setprop(slot, SDA_PROP_LED, 0);
slot->s_xfrp = NULL;
slot->s_xfrtmo = 0;
/*
* And notify any waiter.
*/
sda_slot_exit(slot);
sda_cmd_notify(cmdp, SDA_CMDF_BUSY | SDA_CMDF_DAT, rv);
continue;
}
/*
* Wake any waiter.
*/
sda_slot_exit(slot);
sda_cmd_notify(cmdp, SDA_CMDF_BUSY, rv);
}
mutex_exit(&slot->s_evlock);
}
