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authorStefano Panella <stefano.panella@csr.com>2008-12-12 13:00:06 +0000
committerDavid Vrabel <david.vrabel@csr.com>2008-12-12 13:00:06 +0000
commit5b37717a23b8e40f6cf7ad85a26ddcf41c171e2c (patch)
tree3c611f907bc61c6e1900c4092e8f2f1e8eefd907 /drivers/usb/wusbcore
parentc35fa3ea1ae8198bd65c2c6e59d9ebd68c115a59 (diff)
uwb: improved MAS allocator and reservation conflict handling
Greatly enhance the MAS allocator: - Handle row and column reservations. - Permit all the available MAS to be allocated. - Follows the WiMedia rules on MAS selection. Take appropriate action when reservation conflicts are detected. - Correctly identify which reservation wins the conflict. - Protect alien BP reservations. - If an owned reservation loses, resize/move it. - Follow the backoff procedure before requesting additional MAS. When reservations are terminated, move the remaining reservations (if necessary) so they keep following the MAS allocation rules. Signed-off-by: Stefano Panella <stefano.panella@csr.com> Signed-off-by: David Vrabel <david.vrabel@csr.com>
Diffstat (limited to 'drivers/usb/wusbcore')
-rw-r--r--drivers/usb/wusbcore/reservation.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/usb/wusbcore/reservation.c b/drivers/usb/wusbcore/reservation.c
index 7b6525dac2f..c37e4f83e54 100644
--- a/drivers/usb/wusbcore/reservation.c
+++ b/drivers/usb/wusbcore/reservation.c
@@ -48,13 +48,15 @@ static void wusbhc_rsv_complete_cb(struct uwb_rsv *rsv)
{
struct wusbhc *wusbhc = rsv->pal_priv;
struct device *dev = wusbhc->dev;
+ struct uwb_mas_bm mas;
char buf[72];
switch (rsv->state) {
case UWB_RSV_STATE_O_ESTABLISHED:
- bitmap_scnprintf(buf, sizeof(buf), rsv->mas.bm, UWB_NUM_MAS);
+ uwb_rsv_get_usable_mas(rsv, &mas);
+ bitmap_scnprintf(buf, sizeof(buf), mas.bm, UWB_NUM_MAS);
dev_dbg(dev, "established reservation: %s\n", buf);
- wusbhc_bwa_set(wusbhc, rsv->stream, &rsv->mas);
+ wusbhc_bwa_set(wusbhc, rsv->stream, &mas);
break;
case UWB_RSV_STATE_NONE:
dev_dbg(dev, "removed reservation\n");
@@ -85,13 +87,12 @@ int wusbhc_rsv_establish(struct wusbhc *wusbhc)
bcid.data[0] = wusbhc->cluster_id;
bcid.data[1] = 0;
- rsv->owner = &rc->uwb_dev;
rsv->target.type = UWB_RSV_TARGET_DEVADDR;
rsv->target.devaddr = bcid;
rsv->type = UWB_DRP_TYPE_PRIVATE;
- rsv->max_mas = 256;
- rsv->min_mas = 16; /* one MAS per zone? */
- rsv->sparsity = 16; /* at least one MAS in each zone? */
+ rsv->max_mas = 256; /* try to get as much as possible */
+ rsv->min_mas = 15; /* one MAS per zone */
+ rsv->max_interval = 1; /* max latency is one zone */
rsv->is_multicast = true;
ret = uwb_rsv_establish(rsv);