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mditx_interfaceMT(D3mdi)

mditx_interfaceMT -- Multi-threaded interface routine for MP-aware drivers

Synopsis (Not in SVR5 version)

   #include <sys/mdi.h>
   
   void mditx_interfaceMT(
   	mditx_IFMT_t * txint,
   	mblk_t * msg);

Description

The mditx_interfaceMT( ) function is called from the driver's put( ), service( ), and interrupt routines to service the driver's write queue, and also, for the put( ) routine, to issue a new transmit request to the adapter.

The service routine and interrupt routine call mditx_interfaceMT( ) with a NULL msg argument. The put( ) routine calls mditx_interface( ) with a non-NULL msg.

Usage

The actual code for this routine is provided below.

   void
   mditx_interfaceMT(mditx_IFMT_t * txint, mblk_t * msg)
   {
       int			plev;
       void * 		txr;
       mblk_t *		qmsg;
   
       plev = lockb5(&txint->txlock);
       while (txint->q->q_first
   		&& (txr = (*txint->get_txr)(txint->handle)) != NULL) {
   	qmsg = getq(txint->q);
   	unlockb(&txint->txlock, plev);
   	(*txint->process_msg)(txint->handle, txr, qmsg);
   	plev = lockb5(&txint->txlock);
       }	
       if (msg != NULL) {
   	if (!txint->q->q_first
   		&& (txr = (*txint->get_txr)(txint->handle)) != NULL) {
   	    unlockb(&txint->txlock, plev);
   	    (*txint->process_msg)(txint->handle, txr, msg);
   	}
   	else {
   	    unlockb(&txint->txlock, plev);
   	    putq(txint->q, msg);
   	}
       }
       else
   	unlockb(&txint->txlock, plev);
       return;
   }

Context and synchronization

Blockable context.

Hardware applicability

All

Version applicability

mdi: 1

Differences between versions

This function is not supported in MDI on SVR5 systems. In DDI 8, use the mdi_tx_if_init(D3mdi) and related functions instead of mditx_interfaceMT( ).

Return values

None.

References

lockb(D3oddi), mditx_interface(D3mdi), mditx_register(D3mdi)