1394/adapters/hci1394_tlabel.c

31  *   These routines track the tlabel usage for a 1394 adapter.
46  *    Initialize the tlabel structures.  These structures will be protected
49  *    for the rest of the tlabel functions.
61 	/* alloc space for tlabel data */
68 	 * Initialize tlabel structure. We start with max node set to the
83 	 * used in normal tlabel processing (i.e. not just during
121  *    alloc a tlabel based on the node id. If alloc fails, we are out of
123  *    bad tlabel's are free to be used again.
167 	 * If there are any bad tlabels, see if the last bad tlabel recorded for
189 	 * Find a free tlabel.  This will break out of the loop once it finds a
190 	 * tlabel.  There are a total of TLABEL_RANGE tlabels.  The alloc
191 	 * rotates the check so that we don't always use the same tlabel. It
192 	 * stores the last tlabel used in last.
196 		/* if the next tlabel to check is free */
198 			/* we are using this tlabel */
211 			 * next tlabel next alloc().  Note the rollover at
225 			/* unlock the tlabel structure */
234 		 * This tlabel is not free, lets go to the next one. Note the
262  *    free the previously alloc()'d tlabel.  Once a tlabel has been free'd, it
270 	uint_t tlabel;
278 	/* figure out what node and tlabel we are using */
280 	tlabel = tlabel_info->tbi_tlabel;
289 	 * Put the tlabel back in the free list and NULL out the (void *) in the
294 	tlabel_handle->tb_lookup[node_number][tlabel] = NULL;
295 	tlabel_handle->tb_free[node_number] |= ((uint64_t)1 << tlabel);
305  *    Register an opaque command with an alloc()'d tlabel. Each nodeID has it's
306  *    own tlabel list.
313 	uint_t tlabel;
322 	/* figure out what node and tlabel we are using */
324 	tlabel = tlabel_info->tbi_tlabel;
329 	tlabel_handle->tb_lookup[node_number][tlabel] = cmd;
341  *    specified tlabel from alloc(). If a tlabel was not registered, cmd ='s
349 	uint_t tlabel;
359 	/* figure out what node and tlabel we are using */
361 	tlabel = tlabel_info->tbi_tlabel;
369 	*cmd = tlabel_handle->tb_lookup[node_number][tlabel];
384  *    Register the specified tlabel as bad.  tlabel_lookup() will no longer
385  *    return a registered opaque command and this tlabel will not be returned
394 	uint_t tlabel;
401 	/* figure out what node and tlabel we are using */
403 	tlabel = tlabel_info->tbi_tlabel & TLABEL_MASK;
411 	 * Put the tlabel in the bad list and NULL out the (void *) in the
412 	 * lookup structure.  We may see this tlabel shortly if the device is
420 	tlabel_handle->tb_bad[node_number] |= ((uint64_t)1 << tlabel);
421 	tlabel_handle->tb_lookup[node_number][tlabel] = NULL;
431  *    resets the tlabel tracking structures to an initial state where no
466 	 * Mark all tlabels as free.  No bad tlabels.  Start the first tlabel
499  *	    if ((current time + reclaim time) >= last bad tlabel time)
511 	 * We do not need to lock the tlabel structure in this because we are