diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2023-01-17 14:53:15 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2023-02-03 14:47:17 +0100 |
| commit | 2f5c3c77fc9b6a34b68b97231bfa970e1194ec28 (patch) | |
| tree | 9d894d4b5673c3f55793a8bbe603aa9ec322c686 /drivers/net/wireless/mediatek/mt76/mac80211.c | |
| parent | 412d19b42042fb7e7148ee5293a7ce682a76a0f2 (diff) | |
wifi: mt76: switch to page_pool allocator
In order to reduce possible memory allocation failures due to memory
fragmentation caused by page_frag_cache allocator, switch to page_pool
allocator for dma and usb mt76 drivers.
Remove per rx-queue page_frag_cache
Co-developed-by: Felix Fietkau <nbd@nbd.name>
Tested-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mac80211.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mac80211.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c index 7fe7f68acc24..dc42fff166e8 100644 --- a/drivers/net/wireless/mediatek/mt76/mac80211.c +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -4,6 +4,7 @@ */ #include <linux/sched.h> #include <linux/of.h> +#include <net/page_pool.h> #include "mt76.h" #define CHAN2G(_idx, _freq) { \ @@ -556,6 +557,47 @@ void mt76_unregister_phy(struct mt76_phy *phy) } EXPORT_SYMBOL_GPL(mt76_unregister_phy); +int mt76_create_page_pool(struct mt76_dev *dev, struct mt76_queue *q) +{ + struct page_pool_params pp_params = { + .order = 0, + .flags = PP_FLAG_PAGE_FRAG, + .nid = NUMA_NO_NODE, + .dev = dev->dma_dev, + }; + int idx = q - dev->q_rx; + + switch (idx) { + case MT_RXQ_MAIN: + case MT_RXQ_BAND1: + case MT_RXQ_BAND2: + pp_params.pool_size = 256; + break; + default: + pp_params.pool_size = 16; + break; + } + + if (mt76_is_mmio(dev)) { + /* rely on page_pool for DMA mapping */ + pp_params.flags |= PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; + pp_params.dma_dir = DMA_FROM_DEVICE; + pp_params.max_len = PAGE_SIZE; + pp_params.offset = 0; + } + + q->page_pool = page_pool_create(&pp_params); + if (IS_ERR(q->page_pool)) { + int err = PTR_ERR(q->page_pool); + + q->page_pool = NULL; + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mt76_create_page_pool); + struct mt76_dev * mt76_alloc_device(struct device *pdev, unsigned int size, const struct ieee80211_ops *ops, |