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d4c999bb89
backport from wireless-drivers-next, replacing some existing patches in our tree (marked with '=' are those which were already present): f483039cf51a rt2x00: use simple_read_from_buffer() =5c656c71b1bf rt2800: move usb specific txdone/txstatus routines to rt2800lib =0b0d556e0ebb rt2800mmio: use txdone/txstatus routines from lib =5022efb50f62 rt2x00: do not check for txstatus timeout every time on tasklet =adf26a356f13 rt2x00: use different txstatus timeouts when flushing =0240564430c0 rt2800: flush and txstatus rework for rt2800mmio 6eba8fd22352 rt2x00: rt2400pci: mark expected switch fall-through 10bb92217747 rt2x00: rt2500pci: mark expected switch fall-through 916e6bbcfcff rt2x00: rt2800lib: mark expected switch fall-throughs 641dd8068ecb rt2x00: rt61pci: mark expected switch fall-through 750afb08ca71 cross-tree: phase out dma_zalloc_coherent() =c2e28ef7711f rt2x00: reduce tx power to nominal level on RT6352 a4296994eb80 rt2x00: Work around a firmware bug with shared keys 2587791d5758 rt2x00: no need to check return value of debugfs_create functions pending on linux-wireless: rt2x00: remove unneeded check rt2x00: remove confusing AGC register rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band rt2800: enable TX_PIN_CFG_RFRX_EN only for MT7620 rt2800: comment and simplify AGC init for RT6352 rt2x00: do not print error when queue is full rt2800: partially restore old mmio txstatus behaviour rt2800: new flush implementation for SoC devices rt2800: move txstatus pending routine rt2800mmio: fetch tx status changes rt2800mmio: use timer and work for handling tx statuses timeouts rt2x00: remove last_nostatus_check rt2x00: remove not used entry field rt2x00mmio: remove legacy comment While at it also rename some existing patches now that there are separate folders with patches for each driver to make things a bit nicer to handle. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
126 lines
4.3 KiB
Diff
126 lines
4.3 KiB
Diff
From 91a5340db0526b7263bc8da14b120ea3129b5f28 Mon Sep 17 00:00:00 2001
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From: Stanislaw Gruszka <sgruszka@redhat.com>
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Date: Sat, 9 Feb 2019 12:08:31 +0100
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Subject: [PATCH 21/28] rt2800: partially restore old mmio txstatus behaviour
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Do not disable txstatus interrupt and add quota of processed tx statuses in
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one tasklet. Quota is needed to allow to fed device with new frames during
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processing of tx statuses.
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Patch fixes about 15% performance degradation on some scenarios coused by
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0b0d556e0ebb ("rt2800mmio: use txdone/txstatus routines from lib").
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Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
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---
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.../net/wireless/ralink/rt2x00/rt2800lib.c | 4 +--
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.../net/wireless/ralink/rt2x00/rt2800lib.h | 2 +-
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.../net/wireless/ralink/rt2x00/rt2800mmio.c | 30 +++++--------------
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.../net/wireless/ralink/rt2x00/rt2800usb.c | 2 +-
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4 files changed, 12 insertions(+), 26 deletions(-)
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--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
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@@ -1100,7 +1100,7 @@ void rt2800_txdone_entry(struct queue_en
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}
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EXPORT_SYMBOL_GPL(rt2800_txdone_entry);
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-void rt2800_txdone(struct rt2x00_dev *rt2x00dev)
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+void rt2800_txdone(struct rt2x00_dev *rt2x00dev, unsigned int quota)
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{
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struct data_queue *queue;
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struct queue_entry *entry;
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@@ -1108,7 +1108,7 @@ void rt2800_txdone(struct rt2x00_dev *rt
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u8 qid;
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bool match;
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- while (kfifo_get(&rt2x00dev->txstatus_fifo, ®)) {
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+ while (quota-- > 0 && kfifo_get(&rt2x00dev->txstatus_fifo, ®)) {
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/*
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* TX_STA_FIFO_PID_QUEUE is a 2-bit field, thus qid is
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* guaranteed to be one of the TX QIDs .
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--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.h
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.h
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@@ -195,7 +195,7 @@ void rt2800_process_rxwi(struct queue_en
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void rt2800_txdone_entry(struct queue_entry *entry, u32 status, __le32 *txwi,
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bool match);
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-void rt2800_txdone(struct rt2x00_dev *rt2x00dev);
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+void rt2800_txdone(struct rt2x00_dev *rt2x00dev, unsigned int quota);
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void rt2800_txdone_nostatus(struct rt2x00_dev *rt2x00dev);
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bool rt2800_txstatus_timeout(struct rt2x00_dev *rt2x00dev);
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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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@@ -255,20 +255,6 @@ void rt2800mmio_autowake_tasklet(unsigne
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}
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EXPORT_SYMBOL_GPL(rt2800mmio_autowake_tasklet);
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-static void rt2800mmio_txdone(struct rt2x00_dev *rt2x00dev)
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-{
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- bool timeout = false;
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-
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- while (!kfifo_is_empty(&rt2x00dev->txstatus_fifo) ||
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- (timeout = rt2800_txstatus_timeout(rt2x00dev))) {
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-
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- rt2800_txdone(rt2x00dev);
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-
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- if (timeout)
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- rt2800_txdone_nostatus(rt2x00dev);
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- }
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-}
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-
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static bool rt2800mmio_fetch_txstatus(struct rt2x00_dev *rt2x00dev)
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{
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u32 status;
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@@ -305,14 +291,11 @@ void rt2800mmio_txstatus_tasklet(unsigne
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{
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struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data;
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- do {
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- rt2800mmio_txdone(rt2x00dev);
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+ rt2800_txdone(rt2x00dev, 16);
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- } while (rt2800mmio_fetch_txstatus(rt2x00dev));
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+ if (!kfifo_is_empty(&rt2x00dev->txstatus_fifo))
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+ tasklet_schedule(&rt2x00dev->txstatus_tasklet);
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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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@@ -339,8 +322,10 @@ irqreturn_t rt2800mmio_interrupt(int irq
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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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+ rt2x00_set_field32(&mask, INT_MASK_CSR_TX_FIFO_STATUS, 1);
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rt2800mmio_fetch_txstatus(rt2x00dev);
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- tasklet_schedule(&rt2x00dev->txstatus_tasklet);
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+ if (!kfifo_is_empty(&rt2x00dev->txstatus_fifo))
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+ tasklet_schedule(&rt2x00dev->txstatus_tasklet);
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}
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if (rt2x00_get_field32(reg, INT_SOURCE_CSR_PRE_TBTT))
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@@ -500,7 +485,8 @@ void rt2800mmio_flush_queue(struct data_
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*/
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if (tx_queue) {
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tasklet_disable(&rt2x00dev->txstatus_tasklet);
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- rt2800mmio_txdone(rt2x00dev);
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+ rt2800_txdone(rt2x00dev, UINT_MAX);
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+ rt2800_txdone_nostatus(rt2x00dev);
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tasklet_enable(&rt2x00dev->txstatus_tasklet);
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}
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--- a/drivers/net/wireless/ralink/rt2x00/rt2800usb.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2800usb.c
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@@ -480,7 +480,7 @@ static void rt2800usb_work_txdone(struct
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while (!kfifo_is_empty(&rt2x00dev->txstatus_fifo) ||
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rt2800_txstatus_timeout(rt2x00dev)) {
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- rt2800_txdone(rt2x00dev);
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+ rt2800_txdone(rt2x00dev, UINT_MAX);
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rt2800_txdone_nostatus(rt2x00dev);
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