enum uwb_drp_conflict_action {
/* Reservation is maintained, no action needed */
UWB_DRP_CONFLICT_MANTAIN = 0,
-
+
/* the device shall not transmit frames in conflicting MASs in
* the following superframe. If the device is the reservation
* target, it shall also set the Reason Code in its DRP IE to
* Conflict in its beacon in the following superframe.
*/
UWB_DRP_CONFLICT_ACT1,
-
+
/* the device shall not set the Reservation Status bit to ONE
* and shall not transmit frames in conflicting MASs. If the
* device is the reservation target, it shall also set the
* Reason Code in its DRP IE to Conflict.
- */
+ */
UWB_DRP_CONFLICT_ACT2,
/* the device shall not transmit frames in conflicting MASs in
if (uwb_rsv_has_two_drp_ies(rsv) &&
(rsv->mv.companion_drp_ie != NULL)) {
mv = &rsv->mv;
- num_bytes += mv->companion_drp_ie->hdr.length + 2;
+ num_bytes +=
+ mv->companion_drp_ie->hdr.length + 2;
}
}
}
memcpy(IEDataptr, rsv->drp_ie,
rsv->drp_ie->hdr.length + 2);
IEDataptr += rsv->drp_ie->hdr.length + 2;
-
+
if (uwb_rsv_has_two_drp_ies(rsv) &&
(rsv->mv.companion_drp_ie != NULL)) {
mv = &rsv->mv;
memcpy(IEDataptr, mv->companion_drp_ie,
mv->companion_drp_ie->hdr.length + 2);
- IEDataptr += mv->companion_drp_ie->hdr.length + 2;
+ IEDataptr +=
+ mv->companion_drp_ie->hdr.length + 2;
}
}
}
- result = uwb_rc_cmd_async(rc, "SET-DRP-IE", &cmd->rccb, sizeof(*cmd) + num_bytes,
- UWB_RC_CET_GENERAL, UWB_RC_CMD_SET_DRP_IE,
- uwb_rc_set_drp_cmd_done, NULL);
-
+ result = uwb_rc_cmd_async(rc, "SET-DRP-IE",
+ &cmd->rccb, sizeof(*cmd) + num_bytes,
+ UWB_RC_CET_GENERAL, UWB_RC_CMD_SET_DRP_IE,
+ uwb_rc_set_drp_cmd_done, NULL);
+
rc->set_drp_ie_pending = 1;
kfree(cmd);
int ext_tie_breaker = uwb_ie_drp_tiebreaker(ext_drp_ie);
int ext_status = uwb_ie_drp_status(ext_drp_ie);
int ext_type = uwb_ie_drp_type(ext_drp_ie);
-
-
+
+
/* [ECMA-368 2nd Edition] 17.4.6 */
if (ext_type == UWB_DRP_TYPE_PCA && our_type == UWB_DRP_TYPE_PCA) {
return UWB_DRP_CONFLICT_MANTAIN;
if (our_type == UWB_DRP_TYPE_ALIEN_BP) {
return UWB_DRP_CONFLICT_MANTAIN;
}
-
+
/* [ECMA-368 2nd Edition] 17.4.6-2 */
if (ext_type == UWB_DRP_TYPE_ALIEN_BP) {
/* here we know our_type != UWB_DRP_TYPE_ALIEN_BP */
our_beacon_slot > ext_beacon_slot) {
return UWB_DRP_CONFLICT_MANTAIN;
}
-
+
if (our_status == 0) {
if (our_tie_breaker == ext_tie_breaker) {
/* [ECMA-368 2nd Edition] 17.4.6-6a */
return UWB_DRP_CONFLICT_MANTAIN;
}
-static void handle_conflict_normal(struct uwb_ie_drp *drp_ie,
- int ext_beacon_slot,
- struct uwb_rsv *rsv,
+static void handle_conflict_normal(struct uwb_ie_drp *drp_ie,
+ int ext_beacon_slot,
+ struct uwb_rsv *rsv,
struct uwb_mas_bm *conflicting_mas)
{
struct uwb_rc *rc = rsv->rc;
uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_TO_BE_MOVED);
if (bow->can_reserve_extra_mases == false)
uwb_rsv_backoff_win_increment(rc);
-
+
break;
case UWB_DRP_CONFLICT_ACT3:
uwb_rsv_backoff_win_increment(rc);
switch(action) {
case UWB_DRP_CONFLICT_ACT2:
case UWB_DRP_CONFLICT_ACT3:
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_CONFLICT);
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_CONFLICT);
default:
break;
}
}
-
+
}
static void handle_conflict_expanding(struct uwb_ie_drp *drp_ie, int ext_beacon_slot,
struct uwb_drp_backoff_win *bow = &rc->bow;
struct uwb_rsv_move *mv = &rsv->mv;
int action;
-
+
if (companion_only) {
/* status of companion is 0 at this point */
action = evaluate_conflict_action(drp_ie, ext_beacon_slot, rsv, 0);
switch(action) {
case UWB_DRP_CONFLICT_ACT2:
case UWB_DRP_CONFLICT_ACT3:
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
+ uwb_rsv_set_state(rsv,
+ UWB_RSV_STATE_O_ESTABLISHED);
rsv->needs_release_companion_mas = false;
if (bow->can_reserve_extra_mases == false)
uwb_rsv_backoff_win_increment(rc);
- uwb_drp_avail_release(rsv->rc, &rsv->mv.companion_mas);
+ uwb_drp_avail_release(rsv->rc,
+ &rsv->mv.companion_mas);
}
- } else { /* rsv is target */
+ } else { /* rsv is target */
switch(action) {
case UWB_DRP_CONFLICT_ACT2:
case UWB_DRP_CONFLICT_ACT3:
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_EXPANDING_CONFLICT);
+ uwb_rsv_set_state(rsv,
+ UWB_RSV_STATE_T_EXPANDING_CONFLICT);
/* send_drp_avail_ie = true; */
}
}
- } else { /* also base part of the reservation is conflicting */
+ } else { /* also base part of the reservation is conflicting */
if (uwb_rsv_is_owner(rsv)) {
uwb_rsv_backoff_win_increment(rc);
/* remove companion part */
/* drop some mases with reason modified */
/* put in the companion the mases to be dropped */
- bitmap_andnot(mv->companion_mas.bm, rsv->mas.bm, conflicting_mas->bm, UWB_NUM_MAS);
+ bitmap_andnot(mv->companion_mas.bm, rsv->mas.bm,
+ conflicting_mas->bm, UWB_NUM_MAS);
uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MODIFIED);
} else { /* it is a target rsv */
uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_CONFLICT);
}
static void uwb_drp_handle_conflict_rsv(struct uwb_rc *rc, struct uwb_rsv *rsv,
- struct uwb_rc_evt_drp *drp_evt,
+ struct uwb_rc_evt_drp *drp_evt,
struct uwb_ie_drp *drp_ie,
struct uwb_mas_bm *conflicting_mas)
{
/* check if the conflicting reservation has two drp_ies */
if (uwb_rsv_has_two_drp_ies(rsv)) {
mv = &rsv->mv;
- if (bitmap_intersects(rsv->mas.bm, conflicting_mas->bm, UWB_NUM_MAS)) {
- handle_conflict_expanding(drp_ie, drp_evt->beacon_slot_number,
- rsv, false, conflicting_mas);
+ if (bitmap_intersects(rsv->mas.bm, conflicting_mas->bm,
+ UWB_NUM_MAS)) {
+ handle_conflict_expanding(drp_ie,
+ drp_evt->beacon_slot_number,
+ rsv, false, conflicting_mas);
} else {
- if (bitmap_intersects(mv->companion_mas.bm, conflicting_mas->bm, UWB_NUM_MAS)) {
- handle_conflict_expanding(drp_ie, drp_evt->beacon_slot_number,
- rsv, true, conflicting_mas);
+ if (bitmap_intersects(mv->companion_mas.bm,
+ conflicting_mas->bm, UWB_NUM_MAS)) {
+ handle_conflict_expanding(
+ drp_ie, drp_evt->beacon_slot_number,
+ rsv, true, conflicting_mas);
}
}
- } else if (bitmap_intersects(rsv->mas.bm, conflicting_mas->bm, UWB_NUM_MAS)) {
- handle_conflict_normal(drp_ie, drp_evt->beacon_slot_number, rsv, conflicting_mas);
+ } else if (bitmap_intersects(rsv->mas.bm, conflicting_mas->bm,
+ UWB_NUM_MAS)) {
+ handle_conflict_normal(drp_ie, drp_evt->beacon_slot_number,
+ rsv, conflicting_mas);
}
}
static void uwb_drp_handle_all_conflict_rsv(struct uwb_rc *rc,
- struct uwb_rc_evt_drp *drp_evt,
+ struct uwb_rc_evt_drp *drp_evt,
struct uwb_ie_drp *drp_ie,
struct uwb_mas_bm *conflicting_mas)
{
struct uwb_rsv *rsv;
-
+
list_for_each_entry(rsv, &rc->reservations, rc_node) {
- uwb_drp_handle_conflict_rsv(rc, rsv, drp_evt, drp_ie, conflicting_mas);
+ uwb_drp_handle_conflict_rsv(rc, rsv, drp_evt, drp_ie,
+ conflicting_mas);
+ }
+}
+
+static void uwb_drp_process_target_accepted(struct uwb_rc *rc,
+ struct uwb_rsv *rsv, struct uwb_rc_evt_drp *drp_evt,
+ struct uwb_ie_drp *drp_ie, struct uwb_mas_bm *mas)
+{
+ struct uwb_rsv_move *mv = &rsv->mv;
+ int status;
+
+ status = uwb_ie_drp_status(drp_ie);
+
+ if (rsv->state == UWB_RSV_STATE_T_CONFLICT) {
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_CONFLICT);
+ return;
+ }
+
+ if (rsv->state == UWB_RSV_STATE_T_EXPANDING_ACCEPTED) {
+ /* drp_ie is companion */
+ if (!bitmap_equal(rsv->mas.bm, mas->bm, UWB_NUM_MAS)) {
+ /* stroke companion */
+ uwb_rsv_set_state(rsv,
+ UWB_RSV_STATE_T_EXPANDING_ACCEPTED);
+ }
+ } else {
+ if (!bitmap_equal(rsv->mas.bm, mas->bm, UWB_NUM_MAS)) {
+ if (uwb_drp_avail_reserve_pending(rc, mas) == -EBUSY) {
+ /* FIXME: there is a conflict, find
+ * the conflicting reservations and
+ * take a sensible action. Consider
+ * that in drp_ie there is the
+ * "neighbour" */
+ uwb_drp_handle_all_conflict_rsv(rc, drp_evt,
+ drp_ie, mas);
+ } else {
+ /* accept the extra reservation */
+ bitmap_copy(mv->companion_mas.bm, mas->bm,
+ UWB_NUM_MAS);
+ uwb_rsv_set_state(rsv,
+ UWB_RSV_STATE_T_EXPANDING_ACCEPTED);
+ }
+ } else {
+ if (status) {
+ uwb_rsv_set_state(rsv,
+ UWB_RSV_STATE_T_ACCEPTED);
+ }
+ }
+
}
}
-
+
/*
* Based on the DRP IE, transition a target reservation to a new
* state.
*/
static void uwb_drp_process_target(struct uwb_rc *rc, struct uwb_rsv *rsv,
- struct uwb_ie_drp *drp_ie, struct uwb_rc_evt_drp *drp_evt)
+ struct uwb_ie_drp *drp_ie, struct uwb_rc_evt_drp *drp_evt)
{
struct device *dev = &rc->uwb_dev.dev;
struct uwb_rsv_move *mv = &rsv->mv;
int status;
enum uwb_drp_reason reason_code;
struct uwb_mas_bm mas;
-
+
status = uwb_ie_drp_status(drp_ie);
reason_code = uwb_ie_drp_reason_code(drp_ie);
uwb_drp_ie_to_bm(&mas, drp_ie);
switch (reason_code) {
case UWB_DRP_REASON_ACCEPTED:
-
- if (rsv->state == UWB_RSV_STATE_T_CONFLICT) {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_CONFLICT);
- break;
- }
-
- if (rsv->state == UWB_RSV_STATE_T_EXPANDING_ACCEPTED) {
- /* drp_ie is companion */
- if (!bitmap_equal(rsv->mas.bm, mas.bm, UWB_NUM_MAS))
- /* stroke companion */
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_EXPANDING_ACCEPTED);
- } else {
- if (!bitmap_equal(rsv->mas.bm, mas.bm, UWB_NUM_MAS)) {
- if (uwb_drp_avail_reserve_pending(rc, &mas) == -EBUSY) {
- /* FIXME: there is a conflict, find
- * the conflicting reservations and
- * take a sensible action. Consider
- * that in drp_ie there is the
- * "neighbour" */
- uwb_drp_handle_all_conflict_rsv(rc, drp_evt, drp_ie, &mas);
- } else {
- /* accept the extra reservation */
- bitmap_copy(mv->companion_mas.bm, mas.bm, UWB_NUM_MAS);
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_EXPANDING_ACCEPTED);
- }
- } else {
- if (status) {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_ACCEPTED);
- }
- }
-
- }
+ uwb_drp_process_target_accepted(rc, rsv, drp_evt, drp_ie, &mas);
break;
case UWB_DRP_REASON_MODIFIED:
/* find if the owner wants to expand or reduce */
if (bitmap_subset(mas.bm, rsv->mas.bm, UWB_NUM_MAS)) {
/* owner is reducing */
- bitmap_andnot(mv->companion_mas.bm, rsv->mas.bm, mas.bm, UWB_NUM_MAS);
+ bitmap_andnot(mv->companion_mas.bm, rsv->mas.bm, mas.bm,
+ UWB_NUM_MAS);
uwb_drp_avail_release(rsv->rc, &mv->companion_mas);
}
}
}
+static void uwb_drp_process_owner_accepted(struct uwb_rsv *rsv,
+ struct uwb_mas_bm *mas)
+{
+ struct uwb_rsv_move *mv = &rsv->mv;
+
+ switch (rsv->state) {
+ case UWB_RSV_STATE_O_PENDING:
+ case UWB_RSV_STATE_O_INITIATED:
+ case UWB_RSV_STATE_O_ESTABLISHED:
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
+ break;
+ case UWB_RSV_STATE_O_MODIFIED:
+ if (bitmap_equal(mas->bm, rsv->mas.bm, UWB_NUM_MAS))
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
+ else
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MODIFIED);
+ break;
+
+ case UWB_RSV_STATE_O_MOVE_REDUCING: /* shouldn' t be a problem */
+ if (bitmap_equal(mas->bm, rsv->mas.bm, UWB_NUM_MAS))
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
+ else
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_REDUCING);
+ break;
+ case UWB_RSV_STATE_O_MOVE_EXPANDING:
+ if (bitmap_equal(mas->bm, mv->companion_mas.bm, UWB_NUM_MAS)) {
+ /* Companion reservation accepted */
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_COMBINING);
+ } else {
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_EXPANDING);
+ }
+ break;
+ case UWB_RSV_STATE_O_MOVE_COMBINING:
+ if (bitmap_equal(mas->bm, rsv->mas.bm, UWB_NUM_MAS))
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_REDUCING);
+ else
+ uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_COMBINING);
+ break;
+ default:
+ break;
+ }
+}
/*
* Based on the DRP IE, transition an owner reservation to a new
* state.
struct uwb_rc_evt_drp *drp_evt)
{
struct device *dev = &rc->uwb_dev.dev;
- struct uwb_rsv_move *mv = &rsv->mv;
int status;
enum uwb_drp_reason reason_code;
struct uwb_mas_bm mas;
if (status) {
switch (reason_code) {
case UWB_DRP_REASON_ACCEPTED:
- switch (rsv->state) {
- case UWB_RSV_STATE_O_PENDING:
- case UWB_RSV_STATE_O_INITIATED:
- case UWB_RSV_STATE_O_ESTABLISHED:
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
- break;
- case UWB_RSV_STATE_O_MODIFIED:
- if (bitmap_equal(mas.bm, rsv->mas.bm, UWB_NUM_MAS)) {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
- } else {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MODIFIED);
- }
- break;
-
- case UWB_RSV_STATE_O_MOVE_REDUCING: /* shouldn' t be a problem */
- if (bitmap_equal(mas.bm, rsv->mas.bm, UWB_NUM_MAS)) {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_ESTABLISHED);
- } else {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_REDUCING);
- }
- break;
- case UWB_RSV_STATE_O_MOVE_EXPANDING:
- if (bitmap_equal(mas.bm, mv->companion_mas.bm, UWB_NUM_MAS)) {
- /* Companion reservation accepted */
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_COMBINING);
- } else {
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_EXPANDING);
- }
- break;
- case UWB_RSV_STATE_O_MOVE_COMBINING:
- if (bitmap_equal(mas.bm, rsv->mas.bm, UWB_NUM_MAS))
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_REDUCING);
- else
- uwb_rsv_set_state(rsv, UWB_RSV_STATE_O_MOVE_COMBINING);
- break;
- default:
- break;
- }
+ uwb_drp_process_owner_accepted(rsv, &mas);
break;
default:
dev_warn(dev, "ignoring invalid DRP IE state (%d/%d)\n",
cnflt_update_work);
struct uwb_cnflt_alien *c;
struct uwb_rc *rc = cnflt->rc;
-
+
unsigned long delay_us = UWB_MAS_LENGTH_US * UWB_MAS_PER_ZONE;
-
+
mutex_lock(&rc->rsvs_mutex);
list_del(&cnflt->rc_node);
bitmap_zero(rc->cnflt_alien_bitmap.bm, UWB_NUM_MAS);
list_for_each_entry(c, &rc->cnflt_alien_list, rc_node) {
- bitmap_or(rc->cnflt_alien_bitmap.bm, rc->cnflt_alien_bitmap.bm, c->mas.bm, UWB_NUM_MAS);
+ bitmap_or(rc->cnflt_alien_bitmap.bm, rc->cnflt_alien_bitmap.bm,
+ c->mas.bm, UWB_NUM_MAS);
}
-
- queue_delayed_work(rc->rsv_workq, &rc->rsv_alien_bp_work, usecs_to_jiffies(delay_us));
+
+ queue_delayed_work(rc->rsv_workq, &rc->rsv_alien_bp_work,
+ usecs_to_jiffies(delay_us));
kfree(cnflt);
mutex_unlock(&rc->rsvs_mutex);
struct uwb_cnflt_alien *cnflt;
char buf[72];
unsigned long delay_us = UWB_MAS_LENGTH_US * UWB_MAS_PER_ZONE;
-
+
uwb_drp_ie_to_bm(&mas, drp_ie);
bitmap_scnprintf(buf, sizeof(buf), mas.bm, UWB_NUM_MAS);
-
+
list_for_each_entry(cnflt, &rc->cnflt_alien_list, rc_node) {
if (bitmap_equal(cnflt->mas.bm, mas.bm, UWB_NUM_MAS)) {
/* Existing alien BP reservation conflicting
cnflt->rc = rc;
INIT_WORK(&cnflt->cnflt_update_work, uwb_cnflt_update_work);
-
+
bitmap_copy(cnflt->mas.bm, mas.bm, UWB_NUM_MAS);
list_add_tail(&cnflt->rc_node, &rc->cnflt_alien_list);
bitmap_or(rc->cnflt_alien_bitmap.bm, rc->cnflt_alien_bitmap.bm, mas.bm, UWB_NUM_MAS);
queue_delayed_work(rc->rsv_workq, &rc->rsv_alien_bp_work, usecs_to_jiffies(delay_us));
-
+
/* start the timer */
uwb_cnflt_alien_stroke_timer(cnflt);
}
static void uwb_drp_process_not_involved(struct uwb_rc *rc,
- struct uwb_rc_evt_drp *drp_evt,
+ struct uwb_rc_evt_drp *drp_evt,
struct uwb_ie_drp *drp_ie)
{
struct uwb_mas_bm mas;
-
+
uwb_drp_ie_to_bm(&mas, drp_ie);
uwb_drp_handle_all_conflict_rsv(rc, drp_evt, drp_ie, &mas);
}
*/
return;
}
-
+
/*
* Do nothing with DRP IEs for reservations that have been
* terminated.
uwb_rsv_set_state(rsv, UWB_RSV_STATE_NONE);
return;
}
-
+
if (uwb_ie_drp_owner(drp_ie))
uwb_drp_process_target(rc, rsv, drp_ie, drp_evt);
else
uwb_drp_process_owner(rc, rsv, src, drp_ie, drp_evt);
-
+
}
projects / cascardo / linux.git / commitdiff