diff options
Diffstat (limited to 'package/kernel/mac80211/patches/rt2x00/024-rt2800-partially-restore-old-mmio-txstatus-behaviour.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/rt2x00/024-rt2800-partially-restore-old-mmio-txstatus-behaviour.patch | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/rt2x00/024-rt2800-partially-restore-old-mmio-txstatus-behaviour.patch b/package/kernel/mac80211/patches/rt2x00/024-rt2800-partially-restore-old-mmio-txstatus-behaviour.patch new file mode 100644 index 0000000000..52314a79ae --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/024-rt2800-partially-restore-old-mmio-txstatus-behaviour.patch @@ -0,0 +1,128 @@ +From 91a5340db0526b7263bc8da14b120ea3129b5f28 Mon Sep 17 00:00:00 2001 +From: Stanislaw Gruszka <sgruszka@redhat.com> +Date: Sat, 9 Feb 2019 12:08:31 +0100 +X-Patchwork-Submitter: Stanislaw Gruszka <sgruszka@redhat.com> +X-Patchwork-Id: 10804437 +X-Patchwork-Delegate: kvalo@adurom.com +Subject: [PATCH 21/28] rt2800: partially restore old mmio txstatus behaviour + +Do not disable txstatus interrupt and add quota of processed tx statuses in +one tasklet. Quota is needed to allow to fed device with new frames during +processing of tx statuses. + +Patch fixes about 15% performance degradation on some scenarios coused by +0b0d556e0ebb ("rt2800mmio: use txdone/txstatus routines from lib"). + +Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> +--- + .../net/wireless/ralink/rt2x00/rt2800lib.c | 4 +-- + .../net/wireless/ralink/rt2x00/rt2800lib.h | 2 +- + .../net/wireless/ralink/rt2x00/rt2800mmio.c | 30 +++++-------------- + .../net/wireless/ralink/rt2x00/rt2800usb.c | 2 +- + 4 files changed, 12 insertions(+), 26 deletions(-) + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +@@ -1100,7 +1100,7 @@ void rt2800_txdone_entry(struct queue_en + } + EXPORT_SYMBOL_GPL(rt2800_txdone_entry); + +-void rt2800_txdone(struct rt2x00_dev *rt2x00dev) ++void rt2800_txdone(struct rt2x00_dev *rt2x00dev, unsigned int quota) + { + struct data_queue *queue; + struct queue_entry *entry; +@@ -1108,7 +1108,7 @@ void rt2800_txdone(struct rt2x00_dev *rt + u8 qid; + bool match; + +- while (kfifo_get(&rt2x00dev->txstatus_fifo, ®)) { ++ while (quota-- > 0 && kfifo_get(&rt2x00dev->txstatus_fifo, ®)) { + /* + * TX_STA_FIFO_PID_QUEUE is a 2-bit field, thus qid is + * guaranteed to be one of the TX QIDs . +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.h ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.h +@@ -195,7 +195,7 @@ void rt2800_process_rxwi(struct queue_en + + void rt2800_txdone_entry(struct queue_entry *entry, u32 status, __le32 *txwi, + bool match); +-void rt2800_txdone(struct rt2x00_dev *rt2x00dev); ++void rt2800_txdone(struct rt2x00_dev *rt2x00dev, unsigned int quota); + void rt2800_txdone_nostatus(struct rt2x00_dev *rt2x00dev); + bool rt2800_txstatus_timeout(struct rt2x00_dev *rt2x00dev); + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c +@@ -255,20 +255,6 @@ void rt2800mmio_autowake_tasklet(unsigne + } + EXPORT_SYMBOL_GPL(rt2800mmio_autowake_tasklet); + +-static void rt2800mmio_txdone(struct rt2x00_dev *rt2x00dev) +-{ +- bool timeout = false; +- +- while (!kfifo_is_empty(&rt2x00dev->txstatus_fifo) || +- (timeout = rt2800_txstatus_timeout(rt2x00dev))) { +- +- rt2800_txdone(rt2x00dev); +- +- if (timeout) +- rt2800_txdone_nostatus(rt2x00dev); +- } +-} +- + static bool rt2800mmio_fetch_txstatus(struct rt2x00_dev *rt2x00dev) + { + u32 status; +@@ -305,14 +291,11 @@ void rt2800mmio_txstatus_tasklet(unsigne + { + struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data; + +- do { +- rt2800mmio_txdone(rt2x00dev); ++ rt2800_txdone(rt2x00dev, 16); + +- } while (rt2800mmio_fetch_txstatus(rt2x00dev)); ++ if (!kfifo_is_empty(&rt2x00dev->txstatus_fifo)) ++ tasklet_schedule(&rt2x00dev->txstatus_tasklet); + +- if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) +- rt2800mmio_enable_interrupt(rt2x00dev, +- INT_SOURCE_CSR_TX_FIFO_STATUS); + } + EXPORT_SYMBOL_GPL(rt2800mmio_txstatus_tasklet); + +@@ -339,8 +322,10 @@ irqreturn_t rt2800mmio_interrupt(int irq + mask = ~reg; + + if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS)) { ++ rt2x00_set_field32(&mask, INT_MASK_CSR_TX_FIFO_STATUS, 1); + rt2800mmio_fetch_txstatus(rt2x00dev); +- tasklet_schedule(&rt2x00dev->txstatus_tasklet); ++ if (!kfifo_is_empty(&rt2x00dev->txstatus_fifo)) ++ tasklet_schedule(&rt2x00dev->txstatus_tasklet); + } + + if (rt2x00_get_field32(reg, INT_SOURCE_CSR_PRE_TBTT)) +@@ -500,7 +485,8 @@ void rt2800mmio_flush_queue(struct data_ + */ + if (tx_queue) { + tasklet_disable(&rt2x00dev->txstatus_tasklet); +- rt2800mmio_txdone(rt2x00dev); ++ rt2800_txdone(rt2x00dev, UINT_MAX); ++ rt2800_txdone_nostatus(rt2x00dev); + tasklet_enable(&rt2x00dev->txstatus_tasklet); + } + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800usb.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800usb.c +@@ -480,7 +480,7 @@ static void rt2800usb_work_txdone(struct + while (!kfifo_is_empty(&rt2x00dev->txstatus_fifo) || + rt2800_txstatus_timeout(rt2x00dev)) { + +- rt2800_txdone(rt2x00dev); ++ rt2800_txdone(rt2x00dev, UINT_MAX); + + rt2800_txdone_nostatus(rt2x00dev); + |