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db90c243a0
This updates mac80211 to backports based on kernel 4.19-rc4. I plan to integrate all the patches which are in this tar into upstream backports soon. I used the backports generated from this code: https://github.com/hauke/backports/commits/wip2 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
244 lines
7.3 KiB
Diff
244 lines
7.3 KiB
Diff
From 7993486bbab17f8916993710a8660eb47fd991e9 Mon Sep 17 00:00:00 2001
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From: Stanislaw Gruszka <sgruszka@redhat.com>
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Date: Mon, 9 Jul 2018 16:07:42 +0200
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Subject: [PATCH 2/5] rt2800mmio: use txdone/txstatus routines from lib
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Use usb txdone/txstatus routines (now in rt2800libc) for mmio devices.
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Note this also change how we handle INT_SOURCE_CSR_TX_FIFO_STATUS
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interrupt. Now it is disabled since IRQ routine till end of the txstatus
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tasklet (the same behaviour like others interrupts). Reason to do not
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disable this interrupt was not to miss any tx status from 16 entries
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FIFO register. Now, since we check for tx status timeout, we can
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allow to miss some tx statuses. However this will be improved in further
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patch where I also implement read status FIFO register in the tasklet.
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Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
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---
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.../net/wireless/ralink/rt2x00/rt2800mmio.c | 180 +-----------------
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.../net/wireless/ralink/rt2x00/rt2x00queue.c | 1 +
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2 files changed, 9 insertions(+), 172 deletions(-)
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--- a/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c
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@@ -175,161 +175,6 @@ static void rt2800mmio_wakeup(struct rt2
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rt2800_config(rt2x00dev, &libconf, IEEE80211_CONF_CHANGE_PS);
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}
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-static bool rt2800mmio_txdone_entry_check(struct queue_entry *entry, u32 status)
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-{
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- __le32 *txwi;
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- u32 word;
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- int wcid, tx_wcid;
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-
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- wcid = rt2x00_get_field32(status, TX_STA_FIFO_WCID);
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-
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- txwi = rt2800_drv_get_txwi(entry);
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- word = rt2x00_desc_read(txwi, 1);
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- tx_wcid = rt2x00_get_field32(word, TXWI_W1_WIRELESS_CLI_ID);
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-
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- return (tx_wcid == wcid);
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-}
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-
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-static bool rt2800mmio_txdone_find_entry(struct queue_entry *entry, void *data)
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-{
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- u32 status = *(u32 *)data;
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-
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- /*
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- * rt2800pci hardware might reorder frames when exchanging traffic
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- * with multiple BA enabled STAs.
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- *
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- * For example, a tx queue
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- * [ STA1 | STA2 | STA1 | STA2 ]
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- * can result in tx status reports
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- * [ STA1 | STA1 | STA2 | STA2 ]
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- * when the hw decides to aggregate the frames for STA1 into one AMPDU.
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- *
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- * To mitigate this effect, associate the tx status to the first frame
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- * in the tx queue with a matching wcid.
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- */
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- if (rt2800mmio_txdone_entry_check(entry, status) &&
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- !test_bit(ENTRY_DATA_STATUS_SET, &entry->flags)) {
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- /*
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- * Got a matching frame, associate the tx status with
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- * the frame
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- */
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- entry->status = status;
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- set_bit(ENTRY_DATA_STATUS_SET, &entry->flags);
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- return true;
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- }
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-
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- /* Check the next frame */
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- return false;
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-}
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-
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-static bool rt2800mmio_txdone_match_first(struct queue_entry *entry, void *data)
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-{
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- u32 status = *(u32 *)data;
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-
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- /*
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- * Find the first frame without tx status and assign this status to it
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- * regardless if it matches or not.
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- */
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- if (!test_bit(ENTRY_DATA_STATUS_SET, &entry->flags)) {
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- /*
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- * Got a matching frame, associate the tx status with
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- * the frame
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- */
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- entry->status = status;
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- set_bit(ENTRY_DATA_STATUS_SET, &entry->flags);
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- return true;
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- }
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-
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- /* Check the next frame */
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- return false;
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-}
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-static bool rt2800mmio_txdone_release_entries(struct queue_entry *entry,
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- void *data)
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-{
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- if (test_bit(ENTRY_DATA_STATUS_SET, &entry->flags)) {
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- rt2800_txdone_entry(entry, entry->status,
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- rt2800mmio_get_txwi(entry), true);
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- return false;
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- }
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-
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- /* No more frames to release */
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- return true;
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-}
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-
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-static bool rt2800mmio_txdone(struct rt2x00_dev *rt2x00dev)
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-{
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- struct data_queue *queue;
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- u32 status;
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- u8 qid;
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- int max_tx_done = 16;
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-
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- while (kfifo_get(&rt2x00dev->txstatus_fifo, &status)) {
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- qid = rt2x00_get_field32(status, TX_STA_FIFO_PID_QUEUE);
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- if (unlikely(qid >= QID_RX)) {
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- /*
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- * Unknown queue, this shouldn't happen. Just drop
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- * this tx status.
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- */
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- rt2x00_warn(rt2x00dev, "Got TX status report with unexpected pid %u, dropping\n",
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- qid);
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- break;
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- }
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-
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- queue = rt2x00queue_get_tx_queue(rt2x00dev, qid);
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- if (unlikely(queue == NULL)) {
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- /*
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- * The queue is NULL, this shouldn't happen. Stop
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- * processing here and drop the tx status
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- */
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- rt2x00_warn(rt2x00dev, "Got TX status for an unavailable queue %u, dropping\n",
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- qid);
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- break;
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- }
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-
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- if (unlikely(rt2x00queue_empty(queue))) {
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- /*
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- * The queue is empty. Stop processing here
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- * and drop the tx status.
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- */
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- rt2x00_warn(rt2x00dev, "Got TX status for an empty queue %u, dropping\n",
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- qid);
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- break;
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- }
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-
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- /*
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- * Let's associate this tx status with the first
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- * matching frame.
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- */
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- if (!rt2x00queue_for_each_entry(queue, Q_INDEX_DONE,
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- Q_INDEX, &status,
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- rt2800mmio_txdone_find_entry)) {
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- /*
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- * We cannot match the tx status to any frame, so just
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- * use the first one.
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- */
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- if (!rt2x00queue_for_each_entry(queue, Q_INDEX_DONE,
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- Q_INDEX, &status,
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- rt2800mmio_txdone_match_first)) {
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- rt2x00_warn(rt2x00dev, "No frame found for TX status on queue %u, dropping\n",
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- qid);
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- break;
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- }
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- }
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-
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- /*
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- * Release all frames with a valid tx status.
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- */
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- rt2x00queue_for_each_entry(queue, Q_INDEX_DONE,
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- Q_INDEX, NULL,
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- rt2800mmio_txdone_release_entries);
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-
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- if (--max_tx_done == 0)
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- break;
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- }
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-
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- return !max_tx_done;
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-}
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-
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static inline void rt2800mmio_enable_interrupt(struct rt2x00_dev *rt2x00dev,
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struct rt2x00_field32 irq_field)
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{
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@@ -349,14 +194,14 @@ static inline void rt2800mmio_enable_int
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void rt2800mmio_txstatus_tasklet(unsigned long data)
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{
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struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data;
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- if (rt2800mmio_txdone(rt2x00dev))
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- tasklet_schedule(&rt2x00dev->txstatus_tasklet);
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- /*
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- * No need to enable the tx status interrupt here as we always
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- * leave it enabled to minimize the possibility of a tx status
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- * register overflow. See comment in interrupt handler.
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- */
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+ rt2800_txdone(rt2x00dev);
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+
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+ rt2800_txdone_nostatus(rt2x00dev);
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+
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+ if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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+ rt2800mmio_enable_interrupt(rt2x00dev,
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+ INT_SOURCE_CSR_TX_FIFO_STATUS);
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}
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EXPORT_SYMBOL_GPL(rt2800mmio_txstatus_tasklet);
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@@ -440,10 +285,6 @@ static void rt2800mmio_txstatus_interrup
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* because we can schedule the tasklet multiple times (when the
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* interrupt fires again during tx status processing).
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*
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- * Furthermore we don't disable the TX_FIFO_STATUS
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- * interrupt here but leave it enabled so that the TX_STA_FIFO
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- * can also be read while the tx status tasklet gets executed.
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- *
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* Since we have only one producer and one consumer we don't
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* need to lock the kfifo.
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*/
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@@ -485,13 +326,8 @@ irqreturn_t rt2800mmio_interrupt(int irq
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*/
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mask = ~reg;
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- if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS)) {
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+ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS))
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rt2800mmio_txstatus_interrupt(rt2x00dev);
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- /*
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- * Never disable the TX_FIFO_STATUS interrupt.
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- */
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- rt2x00_set_field32(&mask, INT_MASK_CSR_TX_FIFO_STATUS, 1);
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- }
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if (rt2x00_get_field32(reg, INT_SOURCE_CSR_PRE_TBTT))
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tasklet_hi_schedule(&rt2x00dev->pretbtt_tasklet);
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--- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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@@ -113,6 +113,7 @@ int rt2x00queue_map_txskb(struct queue_e
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return -ENOMEM;
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skbdesc->flags |= SKBDESC_DMA_MAPPED_TX;
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+ rt2x00lib_dmadone(entry);
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return 0;
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}
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EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb);
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