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@ -39,7 +39,7 @@
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* - Use skb_clone(), break up processing in chunks
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* - Split transport/device specific
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* - Make buffer size dynamic to exert less memory pressure
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*
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* - RX reorder support
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*
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* This handles the RX path.
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*
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@ -77,14 +77,42 @@
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* In firmware >= 1.4, RX packets have an extended header (16
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* bytes). This header conveys information for management of host
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* reordering of packets (the device offloads storage of the packets
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* for reordering to the host).
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*
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* Currently this information is not used as the current code doesn't
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* enable host reordering.
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* for reordering to the host). Read below for more information.
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*
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* The header is used as dummy space to emulate an ethernet header and
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* thus be able to act as an ethernet device without having to reallocate.
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*
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* DATA RX REORDERING
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*
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* Starting in firmware v1.4, the device can deliver packets for
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* delivery with special reordering information; this allows it to
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* more effectively do packet management when some frames were lost in
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* the radio traffic.
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*
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* Thus, for RX packets that come out of order, the device gives the
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* driver enough information to queue them properly and then at some
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* point, the signal to deliver the whole (or part) of the queued
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* packets to the networking stack. There are 16 such queues.
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*
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* This only happens when a packet comes in with the "need reorder"
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* flag set in the RX header. When such bit is set, the following
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* operations might be indicated:
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*
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* - reset queue: send all queued packets to the OS
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*
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* - queue: queue a packet
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*
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* - update ws: update the queue's window start and deliver queued
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* packets that meet the criteria
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*
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* - queue & update ws: queue a packet, update the window start and
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* deliver queued packets that meet the criteria
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*
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* (delivery criteria: the packet's [normalized] sequence number is
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* lower than the new [normalized] window start).
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*
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* See the i2400m_roq_*() functions for details.
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*
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* ROADMAP
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*
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* i2400m_rx
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@ -94,6 +122,17 @@
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* i2400m_net_rx
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* i2400m_rx_edata
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* i2400m_net_erx
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* i2400m_roq_reset
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* i2400m_net_erx
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* i2400m_roq_queue
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* __i2400m_roq_queue
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* i2400m_roq_update_ws
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* __i2400m_roq_update_ws
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* i2400m_net_erx
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* i2400m_roq_queue_update_ws
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* __i2400m_roq_queue
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* __i2400m_roq_update_ws
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* i2400m_net_erx
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* i2400m_rx_ctl
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* i2400m_msg_size_check
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* i2400m_report_hook_work [in a workqueue]
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@ -330,6 +369,469 @@ error_check:
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return;
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}
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/*
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* Reorder queue data stored on skb->cb while the skb is queued in the
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* reorder queues.
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*/
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struct i2400m_roq_data {
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unsigned sn; /* Serial number for the skb */
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enum i2400m_cs cs; /* packet type for the skb */
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};
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/*
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* ReOrder Queue
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*
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* @ws: Window Start; sequence number where the current window start
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* is for this queue
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* @queue: the skb queue itself
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* @log: circular ring buffer used to log information about the
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* reorder process in this queue that can be displayed in case of
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* error to help diagnose it.
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*
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* This is the head for a list of skbs. In the skb->cb member of the
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* skb when queued here contains a 'struct i2400m_roq_data' were we
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* store the sequence number (sn) and the cs (packet type) coming from
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* the RX payload header from the device.
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*/
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struct i2400m_roq
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{
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unsigned ws;
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struct sk_buff_head queue;
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struct i2400m_roq_log *log;
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};
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static
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void __i2400m_roq_init(struct i2400m_roq *roq)
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{
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roq->ws = 0;
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skb_queue_head_init(&roq->queue);
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}
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static
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unsigned __i2400m_roq_index(struct i2400m *i2400m, struct i2400m_roq *roq)
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{
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return ((unsigned long) roq - (unsigned long) i2400m->rx_roq)
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/ sizeof(*roq);
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}
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/*
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* Normalize a sequence number based on the queue's window start
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*
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* nsn = (sn - ws) % 2048
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*
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* Note that if @sn < @roq->ws, we still need a positive number; %'s
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* sign is implementation specific, so we normalize it by adding 2048
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* to bring it to be positive.
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*/
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static
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unsigned __i2400m_roq_nsn(struct i2400m_roq *roq, unsigned sn)
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{
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int r;
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r = ((int) sn - (int) roq->ws) % 2048;
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if (r < 0)
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r += 2048;
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return r;
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}
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/*
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* Circular buffer to keep the last N reorder operations
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*
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* In case something fails, dumb then to try to come up with what
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* happened.
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*/
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enum {
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I2400M_ROQ_LOG_LENGTH = 32,
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};
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struct i2400m_roq_log {
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struct i2400m_roq_log_entry {
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enum i2400m_ro_type type;
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unsigned ws, count, sn, nsn, new_ws;
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} entry[I2400M_ROQ_LOG_LENGTH];
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unsigned in, out;
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};
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/* Print a log entry */
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static
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void i2400m_roq_log_entry_print(struct i2400m *i2400m, unsigned index,
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unsigned e_index,
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struct i2400m_roq_log_entry *e)
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{
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struct device *dev = i2400m_dev(i2400m);
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switch(e->type) {
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case I2400M_RO_TYPE_RESET:
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dev_err(dev, "q#%d reset ws %u cnt %u sn %u/%u"
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" - new nws %u\n",
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index, e->ws, e->count, e->sn, e->nsn, e->new_ws);
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break;
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case I2400M_RO_TYPE_PACKET:
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dev_err(dev, "q#%d queue ws %u cnt %u sn %u/%u\n",
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index, e->ws, e->count, e->sn, e->nsn);
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break;
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case I2400M_RO_TYPE_WS:
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dev_err(dev, "q#%d update_ws ws %u cnt %u sn %u/%u"
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" - new nws %u\n",
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index, e->ws, e->count, e->sn, e->nsn, e->new_ws);
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break;
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case I2400M_RO_TYPE_PACKET_WS:
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dev_err(dev, "q#%d queue_update_ws ws %u cnt %u sn %u/%u"
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" - new nws %u\n",
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index, e->ws, e->count, e->sn, e->nsn, e->new_ws);
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break;
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default:
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dev_err(dev, "q#%d BUG? entry %u - unknown type %u\n",
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index, e_index, e->type);
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break;
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}
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}
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static
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void i2400m_roq_log_add(struct i2400m *i2400m,
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struct i2400m_roq *roq, enum i2400m_ro_type type,
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unsigned ws, unsigned count, unsigned sn,
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unsigned nsn, unsigned new_ws)
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{
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struct i2400m_roq_log_entry *e;
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unsigned cnt_idx;
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int index = __i2400m_roq_index(i2400m, roq);
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/* if we run out of space, we eat from the end */
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if (roq->log->in - roq->log->out == I2400M_ROQ_LOG_LENGTH)
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roq->log->out++;
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cnt_idx = roq->log->in++ % I2400M_ROQ_LOG_LENGTH;
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e = &roq->log->entry[cnt_idx];
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e->type = type;
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e->ws = ws;
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e->count = count;
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e->sn = sn;
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e->nsn = nsn;
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e->new_ws = new_ws;
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if (d_test(1))
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i2400m_roq_log_entry_print(i2400m, index, cnt_idx, e);
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}
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/* Dump all the entries in the FIFO and reinitialize it */
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static
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void i2400m_roq_log_dump(struct i2400m *i2400m, struct i2400m_roq *roq)
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{
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unsigned cnt, cnt_idx;
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struct i2400m_roq_log_entry *e;
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int index = __i2400m_roq_index(i2400m, roq);
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BUG_ON(roq->log->out > roq->log->in);
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for (cnt = roq->log->out; cnt < roq->log->in; cnt++) {
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cnt_idx = cnt % I2400M_ROQ_LOG_LENGTH;
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e = &roq->log->entry[cnt_idx];
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i2400m_roq_log_entry_print(i2400m, index, cnt_idx, e);
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|
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memset(e, 0, sizeof(*e));
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|
|
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}
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roq->log->in = roq->log->out = 0;
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|
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}
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|
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|
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|
|
|
|
|
|
/*
|
|
|
|
|
* Backbone for the queuing of an skb (by normalized sequence number)
|
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|
|
|
*
|
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|
|
|
* @i2400m: device descriptor
|
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|
|
|
* @roq: reorder queue where to add
|
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|
|
|
* @skb: the skb to add
|
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|
|
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* @sn: the sequence number of the skb
|
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|
|
|
* @nsn: the normalized sequence number of the skb (pre-computed by the
|
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|
|
|
* caller from the @sn and @roq->ws).
|
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|
|
|
*
|
|
|
|
|
* We try first a couple of quick cases:
|
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|
|
|
*
|
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|
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* - the queue is empty
|
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|
|
|
* - the skb would be appended to the queue
|
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|
|
|
*
|
|
|
|
|
* These will be the most common operations.
|
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|
|
|
*
|
|
|
|
|
* If these fail, then we have to do a sorted insertion in the queue,
|
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|
|
|
* which is the slowest path.
|
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|
|
|
*
|
|
|
|
|
* We don't have to acquire a reference count as we are going to own it.
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
void __i2400m_roq_queue(struct i2400m *i2400m, struct i2400m_roq *roq,
|
|
|
|
|
struct sk_buff *skb, unsigned sn, unsigned nsn)
|
|
|
|
|
{
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
struct sk_buff *skb_itr;
|
|
|
|
|
struct i2400m_roq_data *roq_data_itr, *roq_data;
|
|
|
|
|
unsigned nsn_itr;
|
|
|
|
|
|
|
|
|
|
d_fnstart(4, dev, "(i2400m %p roq %p skb %p sn %u nsn %u)\n",
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|
|
|
i2400m, roq, skb, sn, nsn);
|
|
|
|
|
|
|
|
|
|
roq_data = (struct i2400m_roq_data *) &skb->cb;
|
|
|
|
|
BUILD_BUG_ON(sizeof(*roq_data) > sizeof(skb->cb));
|
|
|
|
|
roq_data->sn = sn;
|
|
|
|
|
d_printf(3, dev, "ERX: roq %p [ws %u] nsn %d sn %u\n",
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|
|
|
|
roq, roq->ws, nsn, roq_data->sn);
|
|
|
|
|
|
|
|
|
|
/* Queues will be empty on not-so-bad environments, so try
|
|
|
|
|
* that first */
|
|
|
|
|
if (skb_queue_empty(&roq->queue)) {
|
|
|
|
|
d_printf(2, dev, "ERX: roq %p - first one\n", roq);
|
|
|
|
|
__skb_queue_head(&roq->queue, skb);
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
/* Now try append, as most of the operations will be that */
|
|
|
|
|
skb_itr = skb_peek_tail(&roq->queue);
|
|
|
|
|
roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
|
|
|
|
|
nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
|
|
|
|
|
/* NSN bounds assumed correct (checked when it was queued) */
|
|
|
|
|
if (nsn >= nsn_itr) {
|
|
|
|
|
d_printf(2, dev, "ERX: roq %p - appended after %p (nsn %d sn %u)\n",
|
|
|
|
|
roq, skb_itr, nsn_itr, roq_data_itr->sn);
|
|
|
|
|
__skb_queue_tail(&roq->queue, skb);
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
/* None of the fast paths option worked. Iterate to find the
|
|
|
|
|
* right spot where to insert the packet; we know the queue is
|
|
|
|
|
* not empty, so we are not the first ones; we also know we
|
|
|
|
|
* are not going to be the last ones. The list is sorted, so
|
|
|
|
|
* we have to insert before the the first guy with an nsn_itr
|
|
|
|
|
* greater that our nsn. */
|
|
|
|
|
skb_queue_walk(&roq->queue, skb_itr) {
|
|
|
|
|
roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
|
|
|
|
|
nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
|
|
|
|
|
/* NSN bounds assumed correct (checked when it was queued) */
|
|
|
|
|
if (nsn_itr > nsn) {
|
|
|
|
|
d_printf(2, dev, "ERX: roq %p - queued before %p "
|
|
|
|
|
"(nsn %d sn %u)\n", roq, skb_itr, nsn_itr,
|
|
|
|
|
roq_data_itr->sn);
|
|
|
|
|
__skb_queue_before(&roq->queue, skb_itr, skb);
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
/* If we get here, that is VERY bad -- print info to help
|
|
|
|
|
* diagnose and crash it */
|
|
|
|
|
dev_err(dev, "SW BUG? failed to insert packet\n");
|
|
|
|
|
dev_err(dev, "ERX: roq %p [ws %u] skb %p nsn %d sn %u\n",
|
|
|
|
|
roq, roq->ws, skb, nsn, roq_data->sn);
|
|
|
|
|
skb_queue_walk(&roq->queue, skb_itr) {
|
|
|
|
|
roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
|
|
|
|
|
nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
|
|
|
|
|
/* NSN bounds assumed correct (checked when it was queued) */
|
|
|
|
|
dev_err(dev, "ERX: roq %p skb_itr %p nsn %d sn %u\n",
|
|
|
|
|
roq, skb_itr, nsn_itr, roq_data_itr->sn);
|
|
|
|
|
}
|
|
|
|
|
BUG();
|
|
|
|
|
out:
|
|
|
|
|
d_fnend(4, dev, "(i2400m %p roq %p skb %p sn %u nsn %d) = void\n",
|
|
|
|
|
i2400m, roq, skb, sn, nsn);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Backbone for the update window start operation
|
|
|
|
|
*
|
|
|
|
|
* @i2400m: device descriptor
|
|
|
|
|
* @roq: Reorder queue
|
|
|
|
|
* @sn: New sequence number
|
|
|
|
|
*
|
|
|
|
|
* Updates the window start of a queue; when doing so, it must deliver
|
|
|
|
|
* to the networking stack all the queued skb's whose normalized
|
|
|
|
|
* sequence number is lower than the new normalized window start.
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
unsigned __i2400m_roq_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
|
|
|
|
|
unsigned sn)
|
|
|
|
|
{
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
struct sk_buff *skb_itr, *tmp_itr;
|
|
|
|
|
struct i2400m_roq_data *roq_data_itr;
|
|
|
|
|
unsigned new_nws, nsn_itr;
|
|
|
|
|
|
|
|
|
|
new_nws = __i2400m_roq_nsn(roq, sn);
|
|
|
|
|
if (unlikely(new_nws >= 1024) && d_test(1)) {
|
|
|
|
|
dev_err(dev, "SW BUG? __update_ws new_nws %u (sn %u ws %u)\n",
|
|
|
|
|
new_nws, sn, roq->ws);
|
|
|
|
|
WARN_ON(1);
|
|
|
|
|
i2400m_roq_log_dump(i2400m, roq);
|
|
|
|
|
}
|
|
|
|
|
skb_queue_walk_safe(&roq->queue, skb_itr, tmp_itr) {
|
|
|
|
|
roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
|
|
|
|
|
nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
|
|
|
|
|
/* NSN bounds assumed correct (checked when it was queued) */
|
|
|
|
|
if (nsn_itr < new_nws) {
|
|
|
|
|
d_printf(2, dev, "ERX: roq %p - release skb %p "
|
|
|
|
|
"(nsn %u/%u new nws %u)\n",
|
|
|
|
|
roq, skb_itr, nsn_itr, roq_data_itr->sn,
|
|
|
|
|
new_nws);
|
|
|
|
|
__skb_unlink(skb_itr, &roq->queue);
|
|
|
|
|
i2400m_net_erx(i2400m, skb_itr, roq_data_itr->cs);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
break; /* rest of packets all nsn_itr > nws */
|
|
|
|
|
}
|
|
|
|
|
roq->ws = sn;
|
|
|
|
|
return new_nws;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Reset a queue
|
|
|
|
|
*
|
|
|
|
|
* @i2400m: device descriptor
|
|
|
|
|
* @cin: Queue Index
|
|
|
|
|
*
|
|
|
|
|
* Deliver all the packets and reset the window-start to zero. Name is
|
|
|
|
|
* kind of misleading.
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
void i2400m_roq_reset(struct i2400m *i2400m, struct i2400m_roq *roq)
|
|
|
|
|
{
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
struct sk_buff *skb_itr, *tmp_itr;
|
|
|
|
|
struct i2400m_roq_data *roq_data_itr;
|
|
|
|
|
|
|
|
|
|
d_fnstart(2, dev, "(i2400m %p roq %p)\n", i2400m, roq);
|
|
|
|
|
i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_RESET,
|
|
|
|
|
roq->ws, skb_queue_len(&roq->queue),
|
|
|
|
|
~0, ~0, 0);
|
|
|
|
|
skb_queue_walk_safe(&roq->queue, skb_itr, tmp_itr) {
|
|
|
|
|
roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
|
|
|
|
|
d_printf(2, dev, "ERX: roq %p - release skb %p (sn %u)\n",
|
|
|
|
|
roq, skb_itr, roq_data_itr->sn);
|
|
|
|
|
__skb_unlink(skb_itr, &roq->queue);
|
|
|
|
|
i2400m_net_erx(i2400m, skb_itr, roq_data_itr->cs);
|
|
|
|
|
}
|
|
|
|
|
roq->ws = 0;
|
|
|
|
|
d_fnend(2, dev, "(i2400m %p roq %p) = void\n", i2400m, roq);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Queue a packet
|
|
|
|
|
*
|
|
|
|
|
* @i2400m: device descriptor
|
|
|
|
|
* @cin: Queue Index
|
|
|
|
|
* @skb: containing the packet data
|
|
|
|
|
* @fbn: First block number of the packet in @skb
|
|
|
|
|
* @lbn: Last block number of the packet in @skb
|
|
|
|
|
*
|
|
|
|
|
* The hardware is asking the driver to queue a packet for later
|
|
|
|
|
* delivery to the networking stack.
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
void i2400m_roq_queue(struct i2400m *i2400m, struct i2400m_roq *roq,
|
|
|
|
|
struct sk_buff * skb, unsigned lbn)
|
|
|
|
|
{
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
unsigned nsn, len;
|
|
|
|
|
|
|
|
|
|
d_fnstart(2, dev, "(i2400m %p roq %p skb %p lbn %u) = void\n",
|
|
|
|
|
i2400m, roq, skb, lbn);
|
|
|
|
|
len = skb_queue_len(&roq->queue);
|
|
|
|
|
nsn = __i2400m_roq_nsn(roq, lbn);
|
|
|
|
|
if (unlikely(nsn >= 1024)) {
|
|
|
|
|
dev_err(dev, "SW BUG? queue nsn %d (lbn %u ws %u)\n",
|
|
|
|
|
nsn, lbn, roq->ws);
|
|
|
|
|
i2400m_roq_log_dump(i2400m, roq);
|
|
|
|
|
i2400m->bus_reset(i2400m, I2400M_RT_WARM);
|
|
|
|
|
} else {
|
|
|
|
|
__i2400m_roq_queue(i2400m, roq, skb, lbn, nsn);
|
|
|
|
|
i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET,
|
|
|
|
|
roq->ws, len, lbn, nsn, ~0);
|
|
|
|
|
}
|
|
|
|
|
d_fnend(2, dev, "(i2400m %p roq %p skb %p lbn %u) = void\n",
|
|
|
|
|
i2400m, roq, skb, lbn);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Update the window start in a reorder queue and deliver all skbs
|
|
|
|
|
* with a lower window start
|
|
|
|
|
*
|
|
|
|
|
* @i2400m: device descriptor
|
|
|
|
|
* @roq: Reorder queue
|
|
|
|
|
* @sn: New sequence number
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
void i2400m_roq_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
|
|
|
|
|
unsigned sn)
|
|
|
|
|
{
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
unsigned old_ws, nsn, len;
|
|
|
|
|
|
|
|
|
|
d_fnstart(2, dev, "(i2400m %p roq %p sn %u)\n", i2400m, roq, sn);
|
|
|
|
|
old_ws = roq->ws;
|
|
|
|
|
len = skb_queue_len(&roq->queue);
|
|
|
|
|
nsn = __i2400m_roq_update_ws(i2400m, roq, sn);
|
|
|
|
|
i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_WS,
|
|
|
|
|
old_ws, len, sn, nsn, roq->ws);
|
|
|
|
|
d_fnstart(2, dev, "(i2400m %p roq %p sn %u) = void\n", i2400m, roq, sn);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Queue a packet and update the window start
|
|
|
|
|
*
|
|
|
|
|
* @i2400m: device descriptor
|
|
|
|
|
* @cin: Queue Index
|
|
|
|
|
* @skb: containing the packet data
|
|
|
|
|
* @fbn: First block number of the packet in @skb
|
|
|
|
|
* @sn: Last block number of the packet in @skb
|
|
|
|
|
*
|
|
|
|
|
* Note that unlike i2400m_roq_update_ws(), which sets the new window
|
|
|
|
|
* start to @sn, in here we'll set it to @sn + 1.
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
void i2400m_roq_queue_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
|
|
|
|
|
struct sk_buff * skb, unsigned sn)
|
|
|
|
|
{
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
unsigned nsn, old_ws, len;
|
|
|
|
|
|
|
|
|
|
d_fnstart(2, dev, "(i2400m %p roq %p skb %p sn %u)\n",
|
|
|
|
|
i2400m, roq, skb, sn);
|
|
|
|
|
len = skb_queue_len(&roq->queue);
|
|
|
|
|
nsn = __i2400m_roq_nsn(roq, sn);
|
|
|
|
|
old_ws = roq->ws;
|
|
|
|
|
if (unlikely(nsn >= 1024)) {
|
|
|
|
|
dev_err(dev, "SW BUG? queue_update_ws nsn %u (sn %u ws %u)\n",
|
|
|
|
|
nsn, sn, roq->ws);
|
|
|
|
|
i2400m_roq_log_dump(i2400m, roq);
|
|
|
|
|
i2400m->bus_reset(i2400m, I2400M_RT_WARM);
|
|
|
|
|
} else {
|
|
|
|
|
/* if the queue is empty, don't bother as we'd queue
|
|
|
|
|
* it and inmediately unqueue it -- just deliver it */
|
|
|
|
|
if (len == 0) {
|
|
|
|
|
struct i2400m_roq_data *roq_data;
|
|
|
|
|
roq_data = (struct i2400m_roq_data *) &skb->cb;
|
|
|
|
|
i2400m_net_erx(i2400m, skb, roq_data->cs);
|
|
|
|
|
}
|
|
|
|
|
else {
|
|
|
|
|
__i2400m_roq_queue(i2400m, roq, skb, sn, nsn);
|
|
|
|
|
__i2400m_roq_update_ws(i2400m, roq, sn + 1);
|
|
|
|
|
}
|
|
|
|
|
i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET_WS,
|
|
|
|
|
old_ws, len, sn, nsn, roq->ws);
|
|
|
|
|
}
|
|
|
|
|
d_fnend(2, dev, "(i2400m %p roq %p skb %p sn %u) = void\n",
|
|
|
|
|
i2400m, roq, skb, sn);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Receive and send up an extended data packet
|
|
|
|
|
*
|
|
|
|
@ -347,6 +849,28 @@ error_check:
|
|
|
|
|
* having to copy packets around.
|
|
|
|
|
*
|
|
|
|
|
* This function handles said path.
|
|
|
|
|
*
|
|
|
|
|
*
|
|
|
|
|
* Receive and send up an extended data packet that requires no reordering
|
|
|
|
|
*
|
|
|
|
|
* @i2400m: device descriptor
|
|
|
|
|
* @skb_rx: skb that contains the extended data packet
|
|
|
|
|
* @single_last: 1 if the payload is the only one or the last one of
|
|
|
|
|
* the skb.
|
|
|
|
|
* @payload: pointer to the packet's data (past the actual extended
|
|
|
|
|
* data payload header).
|
|
|
|
|
* @size: size of the payload
|
|
|
|
|
*
|
|
|
|
|
* Pass over to the networking stack a data packet that might have
|
|
|
|
|
* reordering requirements.
|
|
|
|
|
*
|
|
|
|
|
* This needs to the decide if the skb in which the packet is
|
|
|
|
|
* contained can be reused or if it needs to be cloned. Then it has to
|
|
|
|
|
* be trimmed in the edges so that the beginning is the space for eth
|
|
|
|
|
* header and then pass it to i2400m_net_erx() for the stack
|
|
|
|
|
*
|
|
|
|
|
* Assumes the caller has verified the sanity of the payload (size,
|
|
|
|
|
* etc) already.
|
|
|
|
|
*/
|
|
|
|
|
static
|
|
|
|
|
void i2400m_rx_edata(struct i2400m *i2400m, struct sk_buff *skb_rx,
|
|
|
|
@ -357,53 +881,86 @@ void i2400m_rx_edata(struct i2400m *i2400m, struct sk_buff *skb_rx,
|
|
|
|
|
struct net_device *net_dev = i2400m->wimax_dev.net_dev;
|
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
enum i2400m_cs cs;
|
|
|
|
|
unsigned reorder_needed;
|
|
|
|
|
u32 reorder;
|
|
|
|
|
unsigned ro_needed, ro_type, ro_cin, ro_sn;
|
|
|
|
|
struct i2400m_roq *roq;
|
|
|
|
|
struct i2400m_roq_data *roq_data;
|
|
|
|
|
|
|
|
|
|
d_fnstart(4, dev, "(i2400m %p skb_rx %p single %u payload %p "
|
|
|
|
|
BUILD_BUG_ON(ETH_HLEN > sizeof(*hdr));
|
|
|
|
|
|
|
|
|
|
d_fnstart(2, dev, "(i2400m %p skb_rx %p single %u payload %p "
|
|
|
|
|
"size %zu)\n", i2400m, skb_rx, single_last, payload, size);
|
|
|
|
|
if (size < sizeof(*hdr)) {
|
|
|
|
|
dev_err(dev, "ERX: HW BUG? message with short header (%zu "
|
|
|
|
|
"vs %zu bytes expected)\n", size, sizeof(*hdr));
|
|
|
|
|
goto error;
|
|
|
|
|
}
|
|
|
|
|
reorder_needed = le32_to_cpu(hdr->reorder & I2400M_REORDER_NEEDED);
|
|
|
|
|
cs = hdr->cs;
|
|
|
|
|
if (reorder_needed) {
|
|
|
|
|
dev_err(dev, "ERX: HW BUG? reorder needed, it was disabled\n");
|
|
|
|
|
goto error;
|
|
|
|
|
}
|
|
|
|
|
/* ok, so now decide if we want to clone or reuse the skb,
|
|
|
|
|
* pull and trim it so the beginning is the space for the eth
|
|
|
|
|
* header and pass it to i2400m_net_erx() for the stack */
|
|
|
|
|
|
|
|
|
|
if (single_last) {
|
|
|
|
|
skb = skb_get(skb_rx);
|
|
|
|
|
d_printf(3, dev, "ERX: reusing single payload skb %p\n", skb);
|
|
|
|
|
d_printf(3, dev, "ERX: skb %p reusing\n", skb);
|
|
|
|
|
} else {
|
|
|
|
|
skb = skb_clone(skb_rx, GFP_KERNEL);
|
|
|
|
|
d_printf(3, dev, "ERX: cloning %p\n", skb);
|
|
|
|
|
if (skb == NULL) {
|
|
|
|
|
dev_err(dev, "ERX: no memory to clone skb\n");
|
|
|
|
|
net_dev->stats.rx_dropped++;
|
|
|
|
|
goto error_skb_clone;
|
|
|
|
|
}
|
|
|
|
|
d_printf(3, dev, "ERX: skb %p cloned from %p\n", skb, skb_rx);
|
|
|
|
|
}
|
|
|
|
|
/* now we have to pull and trim so that the skb points to the
|
|
|
|
|
* beginning of the IP packet; the netdev part will add the
|
|
|
|
|
* ethernet header as needed. */
|
|
|
|
|
BUILD_BUG_ON(ETH_HLEN > sizeof(*hdr));
|
|
|
|
|
* ethernet header as needed - we know there is enough space
|
|
|
|
|
* because we checked in i2400m_rx_edata(). */
|
|
|
|
|
skb_pull(skb, payload + sizeof(*hdr) - (void *) skb->data);
|
|
|
|
|
skb_trim(skb, (void *) skb_end_pointer(skb) - payload + sizeof(*hdr));
|
|
|
|
|
i2400m_net_erx(i2400m, skb, cs);
|
|
|
|
|
skb_trim(skb, (void *) skb_end_pointer(skb) - payload - sizeof(*hdr));
|
|
|
|
|
|
|
|
|
|
reorder = le32_to_cpu(hdr->reorder);
|
|
|
|
|
ro_needed = reorder & I2400M_RO_NEEDED;
|
|
|
|
|
cs = hdr->cs;
|
|
|
|
|
if (ro_needed) {
|
|
|
|
|
ro_type = (reorder >> I2400M_RO_TYPE_SHIFT) & I2400M_RO_TYPE;
|
|
|
|
|
ro_cin = (reorder >> I2400M_RO_CIN_SHIFT) & I2400M_RO_CIN;
|
|
|
|
|
ro_sn = (reorder >> I2400M_RO_SN_SHIFT) & I2400M_RO_SN;
|
|
|
|
|
|
|
|
|
|
roq = &i2400m->rx_roq[ro_cin];
|
|
|
|
|
roq_data = (struct i2400m_roq_data *) &skb->cb;
|
|
|
|
|
roq_data->sn = ro_sn;
|
|
|
|
|
roq_data->cs = cs;
|
|
|
|
|
d_printf(2, dev, "ERX: reorder needed: "
|
|
|
|
|
"type %u cin %u [ws %u] sn %u/%u len %zuB\n",
|
|
|
|
|
ro_type, ro_cin, roq->ws, ro_sn,
|
|
|
|
|
__i2400m_roq_nsn(roq, ro_sn), size);
|
|
|
|
|
d_dump(2, dev, payload, size);
|
|
|
|
|
switch(ro_type) {
|
|
|
|
|
case I2400M_RO_TYPE_RESET:
|
|
|
|
|
i2400m_roq_reset(i2400m, roq);
|
|
|
|
|
kfree_skb(skb); /* no data here */
|
|
|
|
|
break;
|
|
|
|
|
case I2400M_RO_TYPE_PACKET:
|
|
|
|
|
i2400m_roq_queue(i2400m, roq, skb, ro_sn);
|
|
|
|
|
break;
|
|
|
|
|
case I2400M_RO_TYPE_WS:
|
|
|
|
|
i2400m_roq_update_ws(i2400m, roq, ro_sn);
|
|
|
|
|
kfree_skb(skb); /* no data here */
|
|
|
|
|
break;
|
|
|
|
|
case I2400M_RO_TYPE_PACKET_WS:
|
|
|
|
|
i2400m_roq_queue_update_ws(i2400m, roq, skb, ro_sn);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
dev_err(dev, "HW BUG? unknown reorder type %u\n", ro_type);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
i2400m_net_erx(i2400m, skb, cs);
|
|
|
|
|
error_skb_clone:
|
|
|
|
|
error:
|
|
|
|
|
d_fnend(4, dev, "(i2400m %p skb_rx %p single %u payload %p "
|
|
|
|
|
d_fnend(2, dev, "(i2400m %p skb_rx %p single %u payload %p "
|
|
|
|
|
"size %zu) = void\n", i2400m, skb_rx, single_last, payload, size);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Act on a received payload
|
|
|
|
|
*
|
|
|
|
@ -632,3 +1189,73 @@ error_msg_hdr_check:
|
|
|
|
|
return result;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(i2400m_rx);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Initialize the RX queue and infrastructure
|
|
|
|
|
*
|
|
|
|
|
* This sets up all the RX reordering infrastructures, which will not
|
|
|
|
|
* be used if reordering is not enabled or if the firmware does not
|
|
|
|
|
* support it. The device is told to do reordering in
|
|
|
|
|
* i2400m_dev_initialize(), where it also looks at the value of the
|
|
|
|
|
* i2400m->rx_reorder switch before taking a decission.
|
|
|
|
|
*
|
|
|
|
|
* Note we allocate the roq queues in one chunk and the actual logging
|
|
|
|
|
* support for it (logging) in another one and then we setup the
|
|
|
|
|
* pointers from the first to the last.
|
|
|
|
|
*/
|
|
|
|
|
int i2400m_rx_setup(struct i2400m *i2400m)
|
|
|
|
|
{
|
|
|
|
|
int result = 0;
|
|
|
|
|
struct device *dev = i2400m_dev(i2400m);
|
|
|
|
|
|
|
|
|
|
i2400m->rx_reorder = i2400m_rx_reorder_disabled? 0 : 1;
|
|
|
|
|
if (i2400m->rx_reorder) {
|
|
|
|
|
unsigned itr;
|
|
|
|
|
size_t size;
|
|
|
|
|
struct i2400m_roq_log *rd;
|
|
|
|
|
|
|
|
|
|
result = -ENOMEM;
|
|
|
|
|
|
|
|
|
|
size = sizeof(i2400m->rx_roq[0]) * (I2400M_RO_CIN + 1);
|
|
|
|
|
i2400m->rx_roq = kzalloc(size, GFP_KERNEL);
|
|
|
|
|
if (i2400m->rx_roq == NULL) {
|
|
|
|
|
dev_err(dev, "RX: cannot allocate %zu bytes for "
|
|
|
|
|
"reorder queues\n", size);
|
|
|
|
|
goto error_roq_alloc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
size = sizeof(*i2400m->rx_roq[0].log) * (I2400M_RO_CIN + 1);
|
|
|
|
|
rd = kzalloc(size, GFP_KERNEL);
|
|
|
|
|
if (rd == NULL) {
|
|
|
|
|
dev_err(dev, "RX: cannot allocate %zu bytes for "
|
|
|
|
|
"reorder queues log areas\n", size);
|
|
|
|
|
result = -ENOMEM;
|
|
|
|
|
goto error_roq_log_alloc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for(itr = 0; itr < I2400M_RO_CIN + 1; itr++) {
|
|
|
|
|
__i2400m_roq_init(&i2400m->rx_roq[itr]);
|
|
|
|
|
i2400m->rx_roq[itr].log = &rd[itr];
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
error_roq_log_alloc:
|
|
|
|
|
kfree(i2400m->rx_roq);
|
|
|
|
|
error_roq_alloc:
|
|
|
|
|
return result;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Tear down the RX queue and infrastructure */
|
|
|
|
|
void i2400m_rx_release(struct i2400m *i2400m)
|
|
|
|
|
{
|
|
|
|
|
if (i2400m->rx_reorder) {
|
|
|
|
|
unsigned itr;
|
|
|
|
|
for(itr = 0; itr < I2400M_RO_CIN + 1; itr++)
|
|
|
|
|
__skb_queue_purge(&i2400m->rx_roq[itr].queue);
|
|
|
|
|
kfree(i2400m->rx_roq[0].log);
|
|
|
|
|
kfree(i2400m->rx_roq);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|