diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7615/dma.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7615/dma.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c new file mode 100644 index 000000000..637ef0882 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c @@ -0,0 +1,301 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2019 MediaTek Inc. + * + * Author: Ryder Lee <ryder.lee@mediatek.com> + * Roy Luo <royluo@google.com> + * Lorenzo Bianconi <lorenzo@kernel.org> + * Felix Fietkau <nbd@nbd.name> + */ + +#include "mt7615.h" +#include "../dma.h" +#include "mac.h" + +static int +mt7615_init_tx_queue(struct mt7615_dev *dev, int qid, int idx, int n_desc) +{ + struct mt76_queue *hwq; + int err; + + hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL); + if (!hwq) + return -ENOMEM; + + err = mt76_queue_alloc(dev, hwq, idx, n_desc, 0, MT_TX_RING_BASE); + if (err < 0) + return err; + + dev->mt76.q_tx[qid] = hwq; + + return 0; +} + +static int +mt7622_init_tx_queues_multi(struct mt7615_dev *dev) +{ + static const u8 wmm_queue_map[] = { + [IEEE80211_AC_BK] = MT7622_TXQ_AC0, + [IEEE80211_AC_BE] = MT7622_TXQ_AC1, + [IEEE80211_AC_VI] = MT7622_TXQ_AC2, + [IEEE80211_AC_VO] = MT7622_TXQ_AC3, + }; + int ret; + int i; + + for (i = 0; i < ARRAY_SIZE(wmm_queue_map); i++) { + ret = mt7615_init_tx_queue(dev, i, wmm_queue_map[i], + MT7615_TX_RING_SIZE / 2); + if (ret) + return ret; + } + + ret = mt7615_init_tx_queue(dev, MT_TXQ_PSD, + MT7622_TXQ_MGMT, MT7615_TX_MGMT_RING_SIZE); + if (ret) + return ret; + + ret = mt7615_init_tx_queue(dev, MT_TXQ_MCU, + MT7622_TXQ_MCU, MT7615_TX_MCU_RING_SIZE); + return ret; +} + +static int +mt7615_init_tx_queues(struct mt7615_dev *dev) +{ + int ret, i; + + ret = mt7615_init_tx_queue(dev, MT_TXQ_FWDL, + MT7615_TXQ_FWDL, + MT7615_TX_FWDL_RING_SIZE); + if (ret) + return ret; + + if (!is_mt7615(&dev->mt76)) + return mt7622_init_tx_queues_multi(dev); + + ret = mt7615_init_tx_queue(dev, 0, 0, MT7615_TX_RING_SIZE); + if (ret) + return ret; + + for (i = 1; i < MT_TXQ_MCU; i++) + dev->mt76.q_tx[i] = dev->mt76.q_tx[0]; + + ret = mt7615_init_tx_queue(dev, MT_TXQ_MCU, MT7615_TXQ_MCU, + MT7615_TX_MCU_RING_SIZE); + return 0; +} + +static int mt7615_poll_tx(struct napi_struct *napi, int budget) +{ + struct mt7615_dev *dev; + + dev = container_of(napi, struct mt7615_dev, mt76.tx_napi); + + mt76_queue_tx_cleanup(dev, MT_TXQ_MCU, false); + + if (napi_complete_done(napi, 0)) + mt7615_irq_enable(dev, mt7615_tx_mcu_int_mask(dev)); + + return 0; +} + +int mt7615_wait_pdma_busy(struct mt7615_dev *dev) +{ + struct mt76_dev *mdev = &dev->mt76; + + if (!is_mt7663(mdev)) { + u32 mask = MT_PDMA_TX_BUSY | MT_PDMA_RX_BUSY; + u32 reg = mt7615_reg_map(dev, MT_PDMA_BUSY); + + if (!mt76_poll_msec(dev, reg, mask, 0, 1000)) { + dev_err(mdev->dev, "PDMA engine busy\n"); + return -EIO; + } + + return 0; + } + + if (!mt76_poll_msec(dev, MT_PDMA_BUSY_STATUS, + MT_PDMA_TX_IDX_BUSY, 0, 1000)) { + dev_err(mdev->dev, "PDMA engine tx busy\n"); + return -EIO; + } + + if (!mt76_poll_msec(dev, MT_PSE_PG_INFO, + MT_PSE_SRC_CNT, 0, 1000)) { + dev_err(mdev->dev, "PSE engine busy\n"); + return -EIO; + } + + if (!mt76_poll_msec(dev, MT_PDMA_BUSY_STATUS, + MT_PDMA_BUSY_IDX, 0, 1000)) { + dev_err(mdev->dev, "PDMA engine busy\n"); + return -EIO; + } + + return 0; +} + +static void mt7622_dma_sched_init(struct mt7615_dev *dev) +{ + u32 reg = mt7615_reg_map(dev, MT_DMASHDL_BASE); + int i; + + mt76_rmw(dev, reg + MT_DMASHDL_PKT_MAX_SIZE, + MT_DMASHDL_PKT_MAX_SIZE_PLE | MT_DMASHDL_PKT_MAX_SIZE_PSE, + FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PLE, 1) | + FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PSE, 8)); + + for (i = 0; i <= 5; i++) + mt76_wr(dev, reg + MT_DMASHDL_GROUP_QUOTA(i), + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x10) | + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x800)); + + mt76_wr(dev, reg + MT_DMASHDL_Q_MAP(0), 0x42104210); + mt76_wr(dev, reg + MT_DMASHDL_Q_MAP(1), 0x42104210); + mt76_wr(dev, reg + MT_DMASHDL_Q_MAP(2), 0x5); + mt76_wr(dev, reg + MT_DMASHDL_Q_MAP(3), 0); + + mt76_wr(dev, reg + MT_DMASHDL_SCHED_SET0, 0x6012345f); + mt76_wr(dev, reg + MT_DMASHDL_SCHED_SET1, 0xedcba987); +} + +static void mt7663_dma_sched_init(struct mt7615_dev *dev) +{ + int i; + + mt76_rmw(dev, MT_DMA_SHDL(MT_DMASHDL_PKT_MAX_SIZE), + MT_DMASHDL_PKT_MAX_SIZE_PLE | MT_DMASHDL_PKT_MAX_SIZE_PSE, + FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PLE, 1) | + FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PSE, 8)); + + /* enable refill control group 0, 1, 2, 4, 5 */ + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_REFILL), 0xffc80000); + /* enable group 0, 1, 2, 4, 5, 15 */ + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_OPTIONAL), 0x70068037); + + /* each group min quota must larger then PLE_PKT_MAX_SIZE_NUM */ + for (i = 0; i < 5; i++) + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_GROUP_QUOTA(i)), + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x40) | + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x800)); + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_GROUP_QUOTA(5)), + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x40) | + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x40)); + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_GROUP_QUOTA(15)), + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x20) | + FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x20)); + + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_Q_MAP(0)), 0x42104210); + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_Q_MAP(1)), 0x42104210); + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_Q_MAP(2)), 0x00050005); + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_Q_MAP(3)), 0); + /* ALTX0 and ALTX1 QID mapping to group 5 */ + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_SCHED_SET0), 0x6012345f); + mt76_wr(dev, MT_DMA_SHDL(MT_DMASHDL_SCHED_SET1), 0xedcba987); +} + +int mt7615_dma_init(struct mt7615_dev *dev) +{ + int rx_ring_size = MT7615_RX_RING_SIZE; + int rx_buf_size = MT_RX_BUF_SIZE; + int ret; + + /* Increase buffer size to receive large VHT MPDUs */ + if (dev->mphy.cap.has_5ghz) + rx_buf_size *= 2; + + mt76_dma_attach(&dev->mt76); + + mt76_wr(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE | + MT_WPDMA_GLO_CFG_FIFO_LITTLE_ENDIAN | + MT_WPDMA_GLO_CFG_OMIT_TX_INFO); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT0, 0x1); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT21, 0x1); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 0x3); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_MULTI_DMA_EN, 0x3); + + if (is_mt7615(&dev->mt76)) { + mt76_set(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_FIRST_TOKEN_ONLY); + + mt76_wr(dev, MT_WPDMA_GLO_CFG1, 0x1); + mt76_wr(dev, MT_WPDMA_TX_PRE_CFG, 0xf0000); + mt76_wr(dev, MT_WPDMA_RX_PRE_CFG, 0xf7f0000); + mt76_wr(dev, MT_WPDMA_ABT_CFG, 0x4000026); + mt76_wr(dev, MT_WPDMA_ABT_CFG1, 0x18811881); + mt76_set(dev, 0x7158, BIT(16)); + mt76_clear(dev, 0x7000, BIT(23)); + } + + mt76_wr(dev, MT_WPDMA_RST_IDX, ~0); + + ret = mt7615_init_tx_queues(dev); + if (ret) + return ret; + + /* init rx queues */ + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1, + MT7615_RX_MCU_RING_SIZE, rx_buf_size, + MT_RX_RING_BASE); + if (ret) + return ret; + + if (!is_mt7615(&dev->mt76)) + rx_ring_size /= 2; + + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], 0, + rx_ring_size, rx_buf_size, MT_RX_RING_BASE); + if (ret) + return ret; + + mt76_wr(dev, MT_DELAY_INT_CFG, 0); + + ret = mt76_init_queues(dev); + if (ret < 0) + return ret; + + netif_tx_napi_add(&dev->mt76.napi_dev, &dev->mt76.tx_napi, + mt7615_poll_tx, NAPI_POLL_WEIGHT); + napi_enable(&dev->mt76.tx_napi); + + mt76_poll(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_DMA_BUSY | + MT_WPDMA_GLO_CFG_RX_DMA_BUSY, 0, 1000); + + /* start dma engine */ + mt76_set(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_DMA_EN | + MT_WPDMA_GLO_CFG_RX_DMA_EN); + + /* enable interrupts for TX/RX rings */ + mt7615_irq_enable(dev, MT_INT_RX_DONE_ALL | mt7615_tx_mcu_int_mask(dev) | + MT_INT_MCU_CMD); + + if (is_mt7622(&dev->mt76)) + mt7622_dma_sched_init(dev); + + if (is_mt7663(&dev->mt76)) + mt7663_dma_sched_init(dev); + + return 0; +} + +void mt7615_dma_cleanup(struct mt7615_dev *dev) +{ + mt76_clear(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_DMA_EN | + MT_WPDMA_GLO_CFG_RX_DMA_EN); + mt76_set(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_SW_RESET); + + mt76_dma_cleanup(&dev->mt76); +} |