xref: /linux/drivers/net/wireless/mediatek/mt76/mt7996/npu.c (revision 0fc8f6200d2313278fbf4539bbab74677c685531)

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2025 AIROHA Inc
 * Author: Lorenzo Bianconi <lorenzo@kernel.org>
 */
#include <linux/kernel.h>
#include <linux/soc/airoha/airoha_offload.h>

#include "mt7996.h"

static int mt7992_npu_txrx_offload_init(struct mt7996_dev *dev,
					struct airoha_npu *npu)
{
	u32 hif1_ofs = dev->hif2 ? MT_WFDMA0_PCIE1(0) - MT_WFDMA0(0) : 0;
	phys_addr_t phy_addr = dev->mt76.mmio.phy_addr;
	u32 dma_addr;
	int i, err;

	for (i = MT_BAND0; i < MT_BAND2; i++) {
		err = mt76_npu_send_msg(npu, i, WLAN_FUNC_SET_WAIT_DESC,
					MT7996_RX_RING_SIZE, GFP_KERNEL);
		if (err) {
			dev_warn(dev->mt76.dev,
				 "failed setting NPU wlan rx desc size\n");
			return err;
		}

		dma_addr = phy_addr;
		if (i)
			dma_addr += MT_TXQ_RING_BASE(0) + 0x150 + hif1_ofs;
		else
			dma_addr += MT_TXQ_RING_BASE(0) + 0x120;

		err = mt76_npu_send_msg(npu, i,
					WLAN_FUNC_SET_WAIT_TX_RING_PCIE_ADDR,
					dma_addr, GFP_KERNEL);
		if (err) {
			dev_warn(dev->mt76.dev,
				 "failed setting NPU wlan tx desc addr\n");
			return err;
		}
	}

	err = mt76_npu_send_msg(npu, 9, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				phy_addr + MT_RXQ_RRO_AP_RING_BASE,
				GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rxdmad_c addr\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 9, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_RX_RING_SIZE, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rxdmad_c desc size\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 2, WLAN_FUNC_SET_WAIT_TX_RING_PCIE_ADDR,
				phy_addr + MT_RRO_ACK_SN_CTRL, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan tx desc addr\n");
		return err;
	}

	return 0;
}

static int mt7996_npu_txrx_offload_init(struct mt7996_dev *dev,
					struct airoha_npu *npu)
{
	u32 hif1_ofs = dev->hif2 ? MT_WFDMA0_PCIE1(0) - MT_WFDMA0(0) : 0;
	phys_addr_t phy_addr = dev->mt76.mmio.phy_addr;
	u32 dma_addr;
	int err;

	/* npu rx rro ring0 */
	err = mt76_npu_send_msg(npu, 0, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_RX_RING_SIZE, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx desc size\n");
		return err;
	}

	/* npu rx rro ring1 */
	err = mt76_npu_send_msg(npu, 2, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_NPU_RX_RING_SIZE, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx desc size\n");
		return err;
	}

	/* msdu pg  2GHz */
	dma_addr = phy_addr + MT_RXQ_RING_BASE(MT_RXQ_MSDU_PAGE_BAND0) + 0xa0;
	err = mt76_npu_send_msg(npu, 5, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				dma_addr, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 5, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_NPU_RX_RING_SIZE / 4, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx desc size\n");
		return err;
	}

	/* msdu pg 5GHz */
	dma_addr = phy_addr + MT_RXQ_RING_BASE(MT_RXQ_MSDU_PAGE_BAND1) + 0xb0;
	err = mt76_npu_send_msg(npu, 6, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				dma_addr, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 6, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_NPU_RX_RING_SIZE / 2, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx desc size\n");
		return err;
	}

	/* msdu pg 6GHz */
	dma_addr = phy_addr + MT_RXQ_RING_BASE(MT_RXQ_MSDU_PAGE_BAND2) + 0xc0;
	err = mt76_npu_send_msg(npu, 7, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				dma_addr, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 7, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_NPU_RX_RING_SIZE, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx desc size\n");
		return err;
	}

	/* ind cmd ring */
	err = mt76_npu_send_msg(npu, 8, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				phy_addr + MT_RXQ_RRO_IND_RING_BASE,
				GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 8, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_RX_RING_SIZE, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx desc size\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 3, WLAN_FUNC_SET_WAIT_TX_RING_PCIE_ADDR,
				phy_addr + MT_RRO_ACK_SN_CTRL, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan tx desc addr\n");
		return err;
	}

	/* npu tx */
	dma_addr = phy_addr + MT_TXQ_RING_BASE(1) + 0x120;
	err = mt76_npu_send_msg(npu, 0, WLAN_FUNC_SET_WAIT_TX_RING_PCIE_ADDR,
				dma_addr, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan tx desc addr\n");
		return err;
	}

	dma_addr = phy_addr + MT_TXQ_RING_BASE(0) + 0x150 + hif1_ofs;
	err = mt76_npu_send_msg(npu, 2, WLAN_FUNC_SET_WAIT_TX_RING_PCIE_ADDR,
				dma_addr, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan tx desc addr\n");
		return err;
	}

	return 0;
}

static int mt7996_npu_offload_init(struct mt7996_dev *dev,
				   struct airoha_npu *npu)
{
	u32 val;
	int err;

	err = mt76_npu_get_msg(npu, 0, WLAN_FUNC_GET_WAIT_NPU_VERSION,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev, "failed getting NPU fw version\n");
		return err;
	}

	dev_info(dev->mt76.dev, "NPU version: %0d.%d\n",
		 (val >> 16) & 0xffff, val & 0xffff);

	err = mt76_npu_send_msg(npu, 0, WLAN_FUNC_SET_WAIT_PCIE_PORT_TYPE,
				dev->mt76.mmio.npu_type, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe port type\n");
		return err;
	}

	if (is_mt7996(&dev->mt76))
		err = mt7996_npu_txrx_offload_init(dev, npu);
	else
		err = mt7992_npu_txrx_offload_init(dev, npu);

	if (err)
		return err;

	err = mt76_npu_send_msg(npu, 0, WLAN_FUNC_SET_WAIT_TOKEN_ID_SIZE,
				MT7996_HW_TOKEN_SIZE, GFP_KERNEL);
	if (err)
		return err;

	dev->mt76.token_start = MT7996_HW_TOKEN_SIZE;

	return 0;
}

static int mt7992_npu_rxd_init(struct mt7996_dev *dev, struct airoha_npu *npu)
{
	u32 val;
	int err;

	err = mt76_npu_get_msg(npu, 0, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retrieving NPU wlan rx ring0 addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_RRO_BAND0].regs->desc_base);

	err = mt76_npu_get_msg(npu, 1, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retrieving NPU wlan rx ring1 addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_RRO_BAND1].regs->desc_base);

	err = mt76_npu_get_msg(npu, 9, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retrieving NPU wlan rxdmad_c ring addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_RRO_RXDMAD_C].regs->desc_base);

	return 0;
}

static int mt7996_npu_rxd_init(struct mt7996_dev *dev, struct airoha_npu *npu)
{
	u32 val;
	int err;

	err = mt76_npu_get_msg(npu, 0, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retriving NPU wlan rx ring0 addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_RRO_BAND0].regs->desc_base);

	err = mt76_npu_get_msg(npu, 2, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retriving NPU wlan rx ring2 addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_RRO_BAND2].regs->desc_base);

	/* msdu pg ring */
	err = mt76_npu_get_msg(npu, 10, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retriving NPU wlan msdu pg ring addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_MSDU_PAGE_BAND0].regs->desc_base);

	err = mt76_npu_get_msg(npu, 11, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retriving NPU wlan msdu pg ring addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_MSDU_PAGE_BAND1].regs->desc_base);

	err = mt76_npu_get_msg(npu, 12, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retriving NPU wlan msdu pg ring addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_MSDU_PAGE_BAND2].regs->desc_base);

	/* ind_cmd ring */
	err = mt76_npu_get_msg(npu, 8, WLAN_FUNC_GET_WAIT_RXDESC_BASE,
			       &val, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed retriving NPU wlan ind_cmd ring addr\n");
		return err;
	}
	writel(val, &dev->mt76.q_rx[MT_RXQ_RRO_IND].regs->desc_base);

	return 0;
}

static int mt7996_npu_txd_init(struct mt7996_dev *dev, struct airoha_npu *npu)
{
	const enum mt76_band_id band_list[] = {
		MT_BAND0,
		is_mt7996(&dev->mt76) ? MT_BAND2 : MT_BAND1,
	};
	int i, index = 0;

	BUILD_BUG_ON(ARRAY_SIZE(band_list) * 3 !=
		     ARRAY_SIZE(dev->npu_txd_addr));

	for (i = 0; i < ARRAY_SIZE(band_list); i++) {
		int err, band = band_list[i], phy_id;
		u32 val;

		err = mt76_npu_get_msg(npu, band + 5,
				       WLAN_FUNC_GET_WAIT_RXDESC_BASE,
				       &val, GFP_KERNEL);
		if (err) {
			dev_warn(dev->mt76.dev,
				 "failed retrieving NPU wlan tx ring addr\n");
			return err;
		}

		phy_id = is_mt7996(&dev->mt76) ? band == MT_BAND0 ? 1 : 0
					       : band;
		writel(val, &dev->mt76.phys[phy_id]->q_tx[0]->regs->desc_base);

		err = mt76_npu_send_msg(npu, band,
					WLAN_FUNC_SET_WAIT_TX_BUF_SPACE_HW_BASE,
					dev->npu_txd_addr[index++], GFP_KERNEL);
		if (err) {
			dev_warn(dev->mt76.dev,
				 "failed setting NPU wlan queue buf addr\n");
			return err;
		}

		err = mt76_npu_send_msg(npu, band + 5,
					WLAN_FUNC_SET_WAIT_TX_BUF_SPACE_HW_BASE,
					dev->npu_txd_addr[index++],
					GFP_KERNEL);
		if (err) {
			dev_warn(dev->mt76.dev,
				 "failed setting NPU wlan tx buf addr\n");
			return err;
		}

		err = mt76_npu_send_msg(npu, band + 10,
					WLAN_FUNC_SET_WAIT_TX_BUF_SPACE_HW_BASE,
					dev->npu_txd_addr[index++],
					GFP_KERNEL);
		if (err) {
			dev_warn(dev->mt76.dev,
				 "failed setting NPU wlan tx buf base\n");
			return err;
		}
	}

	return 0;
}

static int mt7996_npu_rx_event_init(struct mt7996_dev *dev,
				    struct airoha_npu *npu)
{
	int qid = is_mt7996(&dev->mt76) ? MT_RXQ_TXFREE_BAND0 : MT_RXQ_MAIN_WA;
	phys_addr_t phy_addr = dev->mt76.mmio.phy_addr;
	struct mt76_queue *q = &dev->mt76.q_rx[qid];
	int err;

	err = mt76_npu_send_msg(npu, 0,
				WLAN_FUNC_SET_WAIT_RX_RING_FOR_TXDONE_HW_BASE,
				q->desc_dma, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan tx-done ring\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 10, WLAN_FUNC_SET_WAIT_DESC,
				MT7996_RX_MCU_RING_SIZE, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan descriptors\n");
		return err;
	}

	phy_addr += MT_RXQ_RING_BASE(qid);
	phy_addr += is_mt7996(&dev->mt76) ? 0x90 : 0x20;
	err = mt76_npu_send_msg(npu, 10, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				phy_addr, GFP_KERNEL);
	if (err)
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan rx pcie address\n");
	return err;
}

static int mt7996_npu_set_pcie_addr(struct mt7996_dev *dev,
				    struct airoha_npu *npu)
{
	u32 hif1_ofs = dev->hif2 ? MT_WFDMA0_PCIE1(0) - MT_WFDMA0(0) : 0;
	dma_addr_t dma_addr = dev->mt76.mmio.phy_addr;
	int err;

	dma_addr += MT_RXQ_RING_BASE(MT_RXQ_RRO_BAND0) + 0x80;
	err = mt76_npu_send_msg(npu, 0, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				dma_addr, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");
		return err;
	}

	dma_addr = dev->mt76.mmio.phy_addr + hif1_ofs;
	if (is_mt7996(&dev->mt76)) {
		dma_addr += MT_RXQ_RING_BASE(MT_RXQ_RRO_BAND2) + 0x60;
		err = mt76_npu_send_msg(npu, 2, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
					dma_addr, GFP_KERNEL);
	} else {
		dma_addr += MT_RXQ_RING_BASE(MT_RXQ_RRO_BAND1) + 0x90;
		err = mt76_npu_send_msg(npu, 1, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
					dma_addr, GFP_KERNEL);
	}

	if (err)
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");

	return err;
}

static int mt7996_npu_tx_done_init(struct mt7996_dev *dev,
				   struct airoha_npu *npu)
{
	int err;

	/* rro ring cpu idx */
	err = mt76_npu_send_msg(npu, 15, WLAN_FUNC_SET_WAIT_PCIE_ADDR,
				0, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev,
			 "failed setting NPU wlan PCIe desc addr\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 2, WLAN_FUNC_SET_WAIT_INODE_TXRX_REG_ADDR,
				0, GFP_KERNEL);
	if (err) {
		dev_warn(dev->mt76.dev, "failed setting NPU wlan txrx addr2\n");
		return err;
	}

	err = mt76_npu_send_msg(npu, 7, WLAN_FUNC_SET_WAIT_INODE_TXRX_REG_ADDR,
				0, GFP_KERNEL);
	if (err)
		dev_warn(dev->mt76.dev, "failed setting NPU wlan txrx addr7\n");

	return err;
}

int mt7996_npu_rx_queues_init(struct mt7996_dev *dev)
{
	int err;

	if (!mt76_npu_device_active(&dev->mt76))
		return 0;

	err = mt76_npu_rx_queue_init(&dev->mt76,
				     &dev->mt76.q_rx[MT_RXQ_NPU0]);
	if (err)
		return err;

	return mt76_npu_rx_queue_init(&dev->mt76,
				      &dev->mt76.q_rx[MT_RXQ_NPU1]);
}

int __mt7996_npu_hw_init(struct mt7996_dev *dev)
{
	struct airoha_npu *npu;
	int i, err;

	npu = rcu_dereference_protected(dev->mt76.mmio.npu, &dev->mt76.mutex);
	if (!npu)
		return 0;

	err = mt7996_npu_offload_init(dev, npu);
	if (err)
		return err;

	if (is_mt7996(&dev->mt76))
		err = mt7996_npu_rxd_init(dev, npu);
	else
		err = mt7992_npu_rxd_init(dev, npu);

	if (err)
		return err;

	err = mt7996_npu_txd_init(dev, npu);
	if (err)
		return err;

	err = mt7996_npu_rx_event_init(dev, npu);
	if (err)
		return err;

	err = mt7996_npu_set_pcie_addr(dev, npu);
	if (err)
		return err;

	err = mt7996_npu_tx_done_init(dev, npu);
	if (err)
		return err;

	for (i = MT_RXQ_NPU0; i <= MT_RXQ_NPU1; i++)
		airoha_npu_wlan_enable_irq(npu, i - MT_RXQ_NPU0);

	return 0;
}

int mt7996_npu_hw_init(struct mt7996_dev *dev)
{
	int i, err;

	BUILD_BUG_ON(ARRAY_SIZE(dev->npu_txd_addr) % 3);

	for (i = 0; i < ARRAY_SIZE(dev->npu_txd_addr); i += 3) {
		int band = i && is_mt7996(&dev->mt76) ? MT_BAND2 : MT_BAND0;
		u32 size = is_mt7996(&dev->mt76) ? band == MT_BAND2
						 ? MT7996_NPU_TX_RING_SIZE
						 : MT7996_NPU_RX_RING_SIZE / 2
						 : MT7996_TX_RING_SIZE;

		if (!dmam_alloc_coherent(dev->mt76.dma_dev, 256 * size,
					 &dev->npu_txd_addr[i], GFP_KERNEL))
			return -ENOMEM;

		if (!dmam_alloc_coherent(dev->mt76.dma_dev, 256 * size,
					 &dev->npu_txd_addr[i + 1],
					 GFP_KERNEL))
			return -ENOMEM;

		if (!dmam_alloc_coherent(dev->mt76.dma_dev, 256 * 1024,
					 &dev->npu_txd_addr[i + 2],
					 GFP_KERNEL))
			return -ENOMEM;
	}

	mutex_lock(&dev->mt76.mutex);
	err = __mt7996_npu_hw_init(dev);
	mutex_unlock(&dev->mt76.mutex);

	return err;
}

int mt7996_npu_hw_stop(struct mt7996_dev *dev)
{
	struct airoha_npu *npu;
	int i, err = 0;
	u32 info;

	mutex_lock(&dev->mt76.mutex);

	npu = rcu_dereference_protected(dev->mt76.mmio.npu, &dev->mt76.mutex);
	if (!npu)
		goto unlock;

	err = mt76_npu_send_msg(npu, 4, WLAN_FUNC_SET_WAIT_INODE_TXRX_REG_ADDR,
				0, GFP_KERNEL);
	if (err)
		goto unlock;

	for (i = 0; i < 10; i++) {
		err = mt76_npu_get_msg(npu, 3, WLAN_FUNC_GET_WAIT_NPU_INFO,
				       &info, GFP_KERNEL);
		if (!err && !info)
			break;

		err = -ETIMEDOUT;
		usleep_range(10000, 15000);
	}

	if (!err)
		err = mt76_npu_send_msg(npu, 6,
					WLAN_FUNC_SET_WAIT_INODE_TXRX_REG_ADDR,
					0, GFP_KERNEL);
	else
		dev_err(dev->mt76.dev, "npu stop failed\n");
unlock:
	mutex_unlock(&dev->mt76.mutex);

	return err;
}