From 5b37717a23b8e40f6cf7ad85a26ddcf41c171e2c Mon Sep 17 00:00:00 2001 From: Stefano Panella Date: Fri, 12 Dec 2008 13:00:06 +0000 Subject: 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 Signed-off-by: David Vrabel --- drivers/usb/wusbcore/reservation.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/usb/wusbcore') 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); -- cgit v1.2.3