Z8530_TX_CLEAR(9) Internal Functions Z8530_TX_CLEAR(9)NAME
z8530_tx_clear - Handle TX events from a stopped chip
void z8530_tx_clear(struct z8530_channel * c);
Z8530 channel to shut up
Transmit interrupt vectors for a Z8530 that is in 'parked' mode. For machines with PCI Z85x30 cards, or level triggered interrupts (eg the
MacII) we must clear the interrupt cause or die.
Alan Cox <firstname.lastname@example.org>
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 Z8530_TX_CLEAR(9)
Check Out this Related Man Page
ddi_intr_hilevel(9F) Kernel Functions for Drivers ddi_intr_hilevel(9F)NAME
ddi_intr_hilevel - indicate interrupt handler type
int ddi_intr_hilevel(dev_info_t *dip, uint_t inumber);
Solaris DDI specific (Solaris DDI).
dip Pointer to dev_info structure.
inumber Interrupt number.
ddi_intr_hilevel() returns non-zero if the specified interrupt is a "high level" interrupt.
High level interrupts must be handled without using system services that manipulate thread or process states, because these interrupts are
not blocked by the scheduler.
In addition, high level interrupt handlers must take care to do a minimum of work because they are not preemptable.
A typical high level interrupt handler would put data into a circular buffer and schedule a soft interrupt by calling ddi_trigger_soft-
intr(). The circular buffer could be protected by using a mutex that was properly initialized for the interrupt handler.
ddi_intr_hilevel() can be used before calling ddi_add_intr() to decide which type of interrupt handler should be used. Most device drivers
are designed with the knowledge that the devices they support will always generate low level interrupts, however some devices, for example
those using SBus or VME bus level 6 or 7 interrupts must use this test because on some machines those interrupts are high level (above the
scheduler level) and on other machines they are not.
non-zero indicates a high-level interrupt.
These functions can be called from user or interrupt context.
SEE ALSO ddi_add_intr(9F), mutex(9F)
Writing Device Drivers
SunOS 5.10 7 Jan 1992 ddi_intr_hilevel(9F)
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