cam_periph.c:
Move handling of CAM_AUTOSENSE_FAIL into block dealing with all other scsi status errors. cam_queue.c: cam_queue.h: Fix 'off by one' heap bug in a more efficient manner. Since heap algorithms like to deal with indexes started from 1, offset our heap array pointer at allocation time to make this so for a C environment. This makes the implementation of the algorithm a bit more efficient. cam_xpt.c: Use macros for accessing the head of the heap so that code is isolated from implementation details of the heap.
This commit is contained in:
Justin T. Gibbs
parent
bd43a21c14
commit
5a526431f8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=45844
@ -26,7 +26,7 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: cam_periph.c,v 1.10 1999/01/21 08:29:02 dillon Exp $
|
||||
* $Id: cam_periph.c,v 1.11 1999/04/06 03:05:36 peter Exp $
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -1047,6 +1047,7 @@ cam_periph_error(union ccb *ccb, cam_flags camflags,
|
||||
ccb->ccb_h.retry_count--;
|
||||
error = 0;
|
||||
break;
|
||||
case CAM_AUTOSENSE_FAIL:
|
||||
case CAM_SCSI_STATUS_ERROR:
|
||||
|
||||
switch (ccb->csio.scsi_status) {
|
||||
@ -1354,7 +1355,8 @@ cam_periph_error(union ccb *ccb, cam_flags camflags,
|
||||
err_action);
|
||||
}
|
||||
} else if (ccb->csio.scsi_status ==
|
||||
SCSI_STATUS_CHECK_COND) {
|
||||
SCSI_STATUS_CHECK_COND
|
||||
&& status != CAM_AUTOSENSE_FAIL) {
|
||||
/* no point in decrementing the retry count */
|
||||
panic("cam_periph_error: scsi status of "
|
||||
"CHECK COND returned but no sense "
|
||||
@ -1459,7 +1461,6 @@ cam_periph_error(union ccb *ccb, cam_flags camflags,
|
||||
}
|
||||
break;
|
||||
case CAM_REQ_CMP_ERR:
|
||||
case CAM_AUTOSENSE_FAIL:
|
||||
case CAM_CMD_TIMEOUT:
|
||||
case CAM_UNEXP_BUSFREE:
|
||||
case CAM_UNCOR_PARITY:
|
||||
|
||||
@ -25,7 +25,7 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: cam_queue.c,v 1.1 1998/09/15 06:33:23 gibbs Exp $
|
||||
* $Id: cam_queue.c,v 1.2 1999/04/07 22:57:48 gibbs Exp $
|
||||
*/
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
@ -72,6 +72,11 @@ camq_init(struct camq *camq, int size)
|
||||
printf("camq_init: - cannot malloc array!\n");
|
||||
return (1);
|
||||
}
|
||||
/*
|
||||
* Heap algorithms like everything numbered from 1, so
|
||||
* offset our pointer into the heap array by one element.
|
||||
*/
|
||||
camq->queue_array--;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
@ -95,6 +100,11 @@ void
|
||||
camq_fini(struct camq *queue)
|
||||
{
|
||||
if (queue->queue_array != NULL) {
|
||||
/*
|
||||
* Heap algorithms like everything numbered from 1, so
|
||||
* our pointer into the heap array is offset by one element.
|
||||
*/
|
||||
queue->queue_array++;
|
||||
free(queue->queue_array, M_DEVBUF);
|
||||
}
|
||||
}
|
||||
@ -115,20 +125,26 @@ camq_resize(struct camq *queue, int new_size)
|
||||
/* Couldn't satisfy request */
|
||||
return (CAM_RESRC_UNAVAIL);
|
||||
}
|
||||
/*
|
||||
* Heap algorithms like everything numbered from 1, so
|
||||
* remember that our pointer into the heap array is offset
|
||||
* by one element.
|
||||
*/
|
||||
if (queue->queue_array != NULL) {
|
||||
queue->queue_array++;
|
||||
bcopy(queue->queue_array, new_array,
|
||||
queue->entries * sizeof(cam_pinfo *));
|
||||
free(queue->queue_array, M_DEVBUF);
|
||||
}
|
||||
queue->queue_array = new_array;
|
||||
queue->queue_array = new_array-1;
|
||||
queue->array_size = new_size;
|
||||
return (CAM_REQ_CMP);
|
||||
}
|
||||
|
||||
/*
|
||||
* camq_insert: Given an array of cam_pinfo* elememnts with
|
||||
* the Heap(0, num_elements) property and array_size - num_elements >= 1,
|
||||
* output Heap(0, num_elements+1) including new_entry in the array.
|
||||
* the Heap(1, num_elements) property and array_size - num_elements >= 1,
|
||||
* output Heap(1, num_elements+1) including new_entry in the array.
|
||||
*/
|
||||
void
|
||||
camq_insert(struct camq *queue, cam_pinfo *new_entry)
|
||||
@ -137,17 +153,17 @@ camq_insert(struct camq *queue, cam_pinfo *new_entry)
|
||||
if (queue->entries >= queue->array_size)
|
||||
panic("camq_insert: Attempt to insert into a full queue");
|
||||
#endif
|
||||
queue->entries++;
|
||||
queue->queue_array[queue->entries] = new_entry;
|
||||
new_entry->index = queue->entries;
|
||||
if (queue->entries != 0)
|
||||
heap_up(queue->queue_array, queue->entries);
|
||||
queue->entries++;
|
||||
}
|
||||
|
||||
/*
|
||||
* camq_remove: Given an array of cam_pinfo* elevements with the
|
||||
* Heap(0, num_elements) property and an index such that 0 <= index <=
|
||||
* num_elements, remove that entry and restore the Heap(0, num_elements-1)
|
||||
* Heap(1, num_elements) property and an index such that 1 <= index <=
|
||||
* num_elements, remove that entry and restore the Heap(1, num_elements-1)
|
||||
* property.
|
||||
*/
|
||||
cam_pinfo *
|
||||
@ -155,22 +171,22 @@ camq_remove(struct camq *queue, int index)
|
||||
{
|
||||
cam_pinfo *removed_entry;
|
||||
|
||||
if ((queue->entries - index) <= 0)
|
||||
if (index == 0 || index > queue->entries)
|
||||
return (NULL);
|
||||
removed_entry = queue->queue_array[index];
|
||||
queue->entries--;
|
||||
if (queue->entries != index) {
|
||||
queue->queue_array[index] = queue->queue_array[queue->entries];
|
||||
queue->queue_array[index]->index = index;
|
||||
heap_down(queue->queue_array, index, queue->entries);
|
||||
heap_down(queue->queue_array, index, queue->entries - 1);
|
||||
}
|
||||
removed_entry->index = CAM_UNQUEUED_INDEX;
|
||||
queue->entries--;
|
||||
return (removed_entry);
|
||||
}
|
||||
|
||||
/*
|
||||
* camq_change_priority: Given an array of cam_pinfo* elements with the
|
||||
* Heap(0, num_entries) property, an index such that 0 <= index <= num_elements,
|
||||
* Heap(1, num_entries) property, an index such that 1 <= index <= num_elements,
|
||||
* and an new priority for the element at index, change the priority of
|
||||
* element index and restore the Heap(0, num_elements) property.
|
||||
*/
|
||||
@ -352,8 +368,8 @@ swap(cam_pinfo **queue_array, int i, int j)
|
||||
|
||||
/*
|
||||
* heap_up: Given an array of cam_pinfo* elements with the
|
||||
* Heap(0, new_index-1) property and a new element in location
|
||||
* new_index, output Heap(0, new_index).
|
||||
* Heap(1, new_index-1) property and a new element in location
|
||||
* new_index, output Heap(1, new_index).
|
||||
*/
|
||||
static void
|
||||
heap_up(cam_pinfo **queue_array, int new_index)
|
||||
@ -363,9 +379,9 @@ heap_up(cam_pinfo **queue_array, int new_index)
|
||||
|
||||
child = new_index;
|
||||
|
||||
while (child != 0) {
|
||||
while (child != 1) {
|
||||
|
||||
parent = (child - 1) >> 1;
|
||||
parent = child >> 1;
|
||||
if (queue_cmp(queue_array, parent, child) <= 0)
|
||||
break;
|
||||
swap(queue_array, parent, child);
|
||||
@ -375,8 +391,8 @@ heap_up(cam_pinfo **queue_array, int new_index)
|
||||
|
||||
/*
|
||||
* heap_down: Given an array of cam_pinfo* elements with the
|
||||
* Heap(index + 1, num_entries - 1) property with index containing
|
||||
* an unsorted entry, output Heap(0, num_entries - 1).
|
||||
* Heap(index + 1, num_entries) property with index containing
|
||||
* an unsorted entry, output Heap(index, num_entries).
|
||||
*/
|
||||
static void
|
||||
heap_down(cam_pinfo **queue_array, int index, int num_entries)
|
||||
@ -385,10 +401,10 @@ heap_down(cam_pinfo **queue_array, int index, int num_entries)
|
||||
int parent;
|
||||
|
||||
parent = index;
|
||||
child = (parent << 1) + 1;
|
||||
for (; child < num_entries; child = (parent << 1) + 1) {
|
||||
child = parent << 1;
|
||||
for (; child <= num_entries; child = parent << 1) {
|
||||
|
||||
if (child + 1 < num_entries) {
|
||||
if (child < num_entries) {
|
||||
/* child+1 is the right child of parent */
|
||||
if (queue_cmp(queue_array, child + 1, child) < 0)
|
||||
child++;
|
||||
@ -400,4 +416,3 @@ heap_down(cam_pinfo **queue_array, int index, int num_entries)
|
||||
parent = child;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -25,7 +25,7 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: cam_queue.h,v 1.2 1998/12/15 08:12:03 gibbs Exp $
|
||||
* $Id: cam_queue.h,v 1.3 1999/04/07 22:57:48 gibbs Exp $
|
||||
*/
|
||||
|
||||
#ifndef _CAM_CAM_QUEUE_H
|
||||
@ -136,6 +136,10 @@ void camq_insert(struct camq *queue, cam_pinfo *new_entry);
|
||||
* queue order.
|
||||
*/
|
||||
cam_pinfo *camq_remove(struct camq *queue, int index);
|
||||
#define CAMQ_HEAD 1 /* Head of queue index */
|
||||
|
||||
/* Index the first element in the heap */
|
||||
#define CAMQ_GET_HEAD(camq) ((camq)->queue_array[CAMQ_HEAD])
|
||||
|
||||
/*
|
||||
* camq_change_priority: Raise or lower the priority of an entry
|
||||
|
||||
@ -26,7 +26,7 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: cam_xpt.c,v 1.50 1999/04/07 22:57:48 gibbs Exp $
|
||||
* $Id: cam_xpt.c,v 1.51 1999/04/17 08:36:03 peter Exp $
|
||||
*/
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
@ -755,9 +755,14 @@ xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
|
||||
+ dev->ccbq.dev_active);
|
||||
dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
|
||||
}
|
||||
/*
|
||||
* The priority of a device waiting for CCB resources
|
||||
* is that of the the highest priority peripheral driver
|
||||
* enqueued.
|
||||
*/
|
||||
retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
|
||||
&dev->alloc_ccb_entry.pinfo,
|
||||
dev->drvq.queue_array[0]->priority);
|
||||
CAMQ_GET_HEAD(&dev->drvq)->priority);
|
||||
} else {
|
||||
retval = 0;
|
||||
}
|
||||
@ -771,9 +776,15 @@ xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
|
||||
int retval;
|
||||
|
||||
if (dev->ccbq.dev_openings > 0) {
|
||||
retval = xpt_schedule_dev(&bus->sim->devq->send_queue,
|
||||
&dev->send_ccb_entry.pinfo,
|
||||
dev->ccbq.queue.queue_array[0]->priority);
|
||||
/*
|
||||
* The priority of a device waiting for controller
|
||||
* resources is that of the the highest priority CCB
|
||||
* enqueued.
|
||||
*/
|
||||
retval =
|
||||
xpt_schedule_dev(&bus->sim->devq->send_queue,
|
||||
&dev->send_ccb_entry.pinfo,
|
||||
CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
|
||||
} else {
|
||||
retval = 0;
|
||||
}
|
||||
@ -2334,7 +2345,7 @@ xptperiphlistmatch(struct ccb_dev_match *cdm)
|
||||
if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
|
||||
&& (cdm->pos.cookie.pdrv != NULL))
|
||||
ret = xptpdrvtraverse(
|
||||
(struct periph_driver **)cdm->pos.cookie.pdrv,
|
||||
(struct periph_driver **)cdm->pos.cookie.pdrv,
|
||||
xptplistpdrvfunc, cdm);
|
||||
else
|
||||
ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
|
||||
@ -3382,7 +3393,7 @@ xpt_run_dev_allocq(struct cam_eb *bus)
|
||||
struct camq *drvq;
|
||||
|
||||
qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
|
||||
/*position*/0);
|
||||
CAMQ_HEAD);
|
||||
device = qinfo->device;
|
||||
|
||||
CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
|
||||
@ -3399,14 +3410,7 @@ xpt_run_dev_allocq(struct cam_eb *bus)
|
||||
if ((work_ccb = xpt_get_ccb(device)) != NULL) {
|
||||
devq->alloc_openings--;
|
||||
devq->alloc_active++;
|
||||
drv = (struct cam_periph*)camq_remove(drvq,
|
||||
/*pos*/0);
|
||||
/* Update priority */
|
||||
if (drvq->entries > 0) {
|
||||
qinfo->pinfo.priority = drvq->queue_array[0]->priority;
|
||||
} else {
|
||||
qinfo->pinfo.priority = CAM_PRIORITY_NONE;
|
||||
}
|
||||
drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
|
||||
splx(s);
|
||||
xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
|
||||
drv->pinfo.priority);
|
||||
@ -3467,7 +3471,7 @@ xpt_run_dev_sendq(struct cam_eb *bus)
|
||||
}
|
||||
|
||||
qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
|
||||
/*position*/0);
|
||||
CAMQ_HEAD);
|
||||
device = qinfo->device;
|
||||
|
||||
/*
|
||||
@ -3482,7 +3486,7 @@ xpt_run_dev_sendq(struct cam_eb *bus)
|
||||
CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
|
||||
("running device %p\n", device));
|
||||
|
||||
work_ccb = cam_ccbq_peek_ccb(&device->ccbq, 0);
|
||||
work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
|
||||
if (work_ccb == NULL) {
|
||||
printf("device on run queue with no ccbs???");
|
||||
splx(ospl);
|
||||
@ -3522,13 +3526,8 @@ xpt_run_dev_sendq(struct cam_eb *bus)
|
||||
devq->send_openings--;
|
||||
devq->send_active++;
|
||||
|
||||
if (device->ccbq.queue.entries > 0) {
|
||||
qinfo->pinfo.priority =
|
||||
device->ccbq.queue.queue_array[0]->priority;
|
||||
if (device->ccbq.queue.entries > 0)
|
||||
xpt_schedule_dev_sendq(bus, device);
|
||||
} else {
|
||||
qinfo->pinfo.priority = CAM_PRIORITY_NONE;
|
||||
}
|
||||
|
||||
if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
|
||||
/*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user