mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
766 lines
21 KiB
C
766 lines
21 KiB
C
/*
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* Copyright (c) 2015-2016 MediaTek Inc.
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* Author: Yong Wu <yong.wu@mediatek.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/memblock.h>
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#include <linux/bug.h>
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/device.h>
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#include <linux/dma-iommu.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/iommu.h>
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#include <linux/iopoll.h>
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#include <linux/list.h>
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#include <linux/of_address.h>
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#include <linux/of_iommu.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <asm/barrier.h>
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#include <soc/mediatek/smi.h>
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#include "mtk_iommu.h"
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#define REG_MMU_PT_BASE_ADDR 0x000
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#define REG_MMU_INVALIDATE 0x020
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#define F_ALL_INVLD 0x2
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#define F_MMU_INV_RANGE 0x1
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#define REG_MMU_INVLD_START_A 0x024
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#define REG_MMU_INVLD_END_A 0x028
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#define REG_MMU_INV_SEL 0x038
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#define F_INVLD_EN0 BIT(0)
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#define F_INVLD_EN1 BIT(1)
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#define REG_MMU_STANDARD_AXI_MODE 0x048
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#define REG_MMU_DCM_DIS 0x050
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#define REG_MMU_CTRL_REG 0x110
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#define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4)
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#define F_MMU_TF_PROTECT_SEL_SHIFT(data) \
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((data)->m4u_plat == M4U_MT2712 ? 4 : 5)
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/* It's named by F_MMU_TF_PROT_SEL in mt2712. */
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#define F_MMU_TF_PROTECT_SEL(prot, data) \
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(((prot) & 0x3) << F_MMU_TF_PROTECT_SEL_SHIFT(data))
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#define REG_MMU_IVRP_PADDR 0x114
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#define REG_MMU_VLD_PA_RNG 0x118
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#define F_MMU_VLD_PA_RNG(EA, SA) (((EA) << 8) | (SA))
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#define REG_MMU_INT_CONTROL0 0x120
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#define F_L2_MULIT_HIT_EN BIT(0)
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#define F_TABLE_WALK_FAULT_INT_EN BIT(1)
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#define F_PREETCH_FIFO_OVERFLOW_INT_EN BIT(2)
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#define F_MISS_FIFO_OVERFLOW_INT_EN BIT(3)
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#define F_PREFETCH_FIFO_ERR_INT_EN BIT(5)
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#define F_MISS_FIFO_ERR_INT_EN BIT(6)
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#define F_INT_CLR_BIT BIT(12)
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#define REG_MMU_INT_MAIN_CONTROL 0x124
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#define F_INT_TRANSLATION_FAULT BIT(0)
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#define F_INT_MAIN_MULTI_HIT_FAULT BIT(1)
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#define F_INT_INVALID_PA_FAULT BIT(2)
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#define F_INT_ENTRY_REPLACEMENT_FAULT BIT(3)
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#define F_INT_TLB_MISS_FAULT BIT(4)
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#define F_INT_MISS_TRANSACTION_FIFO_FAULT BIT(5)
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#define F_INT_PRETETCH_TRANSATION_FIFO_FAULT BIT(6)
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#define REG_MMU_CPE_DONE 0x12C
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#define REG_MMU_FAULT_ST1 0x134
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#define REG_MMU_FAULT_VA 0x13c
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#define F_MMU_FAULT_VA_WRITE_BIT BIT(1)
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#define F_MMU_FAULT_VA_LAYER_BIT BIT(0)
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#define REG_MMU_INVLD_PA 0x140
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#define REG_MMU_INT_ID 0x150
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#define F_MMU0_INT_ID_LARB_ID(a) (((a) >> 7) & 0x7)
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#define F_MMU0_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f)
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#define MTK_PROTECT_PA_ALIGN 128
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/*
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* Get the local arbiter ID and the portid within the larb arbiter
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* from mtk_m4u_id which is defined by MTK_M4U_ID.
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*/
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#define MTK_M4U_TO_LARB(id) (((id) >> 5) & 0xf)
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#define MTK_M4U_TO_PORT(id) ((id) & 0x1f)
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struct mtk_iommu_domain {
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spinlock_t pgtlock; /* lock for page table */
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struct io_pgtable_cfg cfg;
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struct io_pgtable_ops *iop;
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struct iommu_domain domain;
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};
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static const struct iommu_ops mtk_iommu_ops;
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static LIST_HEAD(m4ulist); /* List all the M4U HWs */
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#define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list)
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/*
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* There may be 1 or 2 M4U HWs, But we always expect they are in the same domain
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* for the performance.
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*
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* Here always return the mtk_iommu_data of the first probed M4U where the
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* iommu domain information is recorded.
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*/
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static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void)
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{
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struct mtk_iommu_data *data;
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for_each_m4u(data)
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return data;
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return NULL;
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}
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static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom)
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{
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return container_of(dom, struct mtk_iommu_domain, domain);
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}
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static void mtk_iommu_tlb_flush_all(void *cookie)
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{
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struct mtk_iommu_data *data = cookie;
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for_each_m4u(data) {
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writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
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data->base + REG_MMU_INV_SEL);
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writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE);
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wmb(); /* Make sure the tlb flush all done */
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}
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}
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static void mtk_iommu_tlb_add_flush_nosync(unsigned long iova, size_t size,
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size_t granule, bool leaf,
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void *cookie)
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{
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struct mtk_iommu_data *data = cookie;
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for_each_m4u(data) {
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writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
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data->base + REG_MMU_INV_SEL);
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writel_relaxed(iova, data->base + REG_MMU_INVLD_START_A);
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writel_relaxed(iova + size - 1,
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data->base + REG_MMU_INVLD_END_A);
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writel_relaxed(F_MMU_INV_RANGE,
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data->base + REG_MMU_INVALIDATE);
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data->tlb_flush_active = true;
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}
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}
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static void mtk_iommu_tlb_sync(void *cookie)
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{
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struct mtk_iommu_data *data = cookie;
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int ret;
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u32 tmp;
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for_each_m4u(data) {
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/* Avoid timing out if there's nothing to wait for */
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if (!data->tlb_flush_active)
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return;
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ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE,
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tmp, tmp != 0, 10, 100000);
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if (ret) {
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dev_warn(data->dev,
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"Partial TLB flush timed out, falling back to full flush\n");
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mtk_iommu_tlb_flush_all(cookie);
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}
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/* Clear the CPE status */
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writel_relaxed(0, data->base + REG_MMU_CPE_DONE);
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data->tlb_flush_active = false;
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}
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}
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static const struct iommu_gather_ops mtk_iommu_gather_ops = {
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.tlb_flush_all = mtk_iommu_tlb_flush_all,
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.tlb_add_flush = mtk_iommu_tlb_add_flush_nosync,
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.tlb_sync = mtk_iommu_tlb_sync,
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};
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static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
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{
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struct mtk_iommu_data *data = dev_id;
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struct mtk_iommu_domain *dom = data->m4u_dom;
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u32 int_state, regval, fault_iova, fault_pa;
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unsigned int fault_larb, fault_port;
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bool layer, write;
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/* Read error info from registers */
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int_state = readl_relaxed(data->base + REG_MMU_FAULT_ST1);
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fault_iova = readl_relaxed(data->base + REG_MMU_FAULT_VA);
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layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT;
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write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT;
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fault_pa = readl_relaxed(data->base + REG_MMU_INVLD_PA);
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regval = readl_relaxed(data->base + REG_MMU_INT_ID);
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fault_larb = F_MMU0_INT_ID_LARB_ID(regval);
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fault_port = F_MMU0_INT_ID_PORT_ID(regval);
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if (report_iommu_fault(&dom->domain, data->dev, fault_iova,
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write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
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dev_err_ratelimited(
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data->dev,
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"fault type=0x%x iova=0x%x pa=0x%x larb=%d port=%d layer=%d %s\n",
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int_state, fault_iova, fault_pa, fault_larb, fault_port,
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layer, write ? "write" : "read");
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}
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/* Interrupt clear */
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regval = readl_relaxed(data->base + REG_MMU_INT_CONTROL0);
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regval |= F_INT_CLR_BIT;
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writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0);
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mtk_iommu_tlb_flush_all(data);
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return IRQ_HANDLED;
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}
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static void mtk_iommu_config(struct mtk_iommu_data *data,
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struct device *dev, bool enable)
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{
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struct mtk_smi_larb_iommu *larb_mmu;
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unsigned int larbid, portid;
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struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
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int i;
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for (i = 0; i < fwspec->num_ids; ++i) {
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larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
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portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
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larb_mmu = &data->smi_imu.larb_imu[larbid];
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dev_dbg(dev, "%s iommu port: %d\n",
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enable ? "enable" : "disable", portid);
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if (enable)
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larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
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else
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larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
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}
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}
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static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
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{
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struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
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spin_lock_init(&dom->pgtlock);
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dom->cfg = (struct io_pgtable_cfg) {
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.quirks = IO_PGTABLE_QUIRK_ARM_NS |
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IO_PGTABLE_QUIRK_NO_PERMS |
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IO_PGTABLE_QUIRK_TLBI_ON_MAP,
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.pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap,
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.ias = 32,
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.oas = 32,
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.tlb = &mtk_iommu_gather_ops,
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.iommu_dev = data->dev,
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};
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if (data->enable_4GB)
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dom->cfg.quirks |= IO_PGTABLE_QUIRK_ARM_MTK_4GB;
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dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data);
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if (!dom->iop) {
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dev_err(data->dev, "Failed to alloc io pgtable\n");
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return -EINVAL;
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}
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/* Update our support page sizes bitmap */
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dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap;
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return 0;
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}
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static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
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{
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struct mtk_iommu_domain *dom;
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if (type != IOMMU_DOMAIN_DMA)
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return NULL;
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dom = kzalloc(sizeof(*dom), GFP_KERNEL);
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if (!dom)
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return NULL;
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if (iommu_get_dma_cookie(&dom->domain))
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goto free_dom;
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if (mtk_iommu_domain_finalise(dom))
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goto put_dma_cookie;
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dom->domain.geometry.aperture_start = 0;
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dom->domain.geometry.aperture_end = DMA_BIT_MASK(32);
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dom->domain.geometry.force_aperture = true;
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return &dom->domain;
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put_dma_cookie:
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iommu_put_dma_cookie(&dom->domain);
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free_dom:
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kfree(dom);
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return NULL;
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}
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static void mtk_iommu_domain_free(struct iommu_domain *domain)
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{
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struct mtk_iommu_domain *dom = to_mtk_domain(domain);
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free_io_pgtable_ops(dom->iop);
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iommu_put_dma_cookie(domain);
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kfree(to_mtk_domain(domain));
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}
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static int mtk_iommu_attach_device(struct iommu_domain *domain,
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struct device *dev)
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{
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struct mtk_iommu_domain *dom = to_mtk_domain(domain);
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struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
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if (!data)
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return -ENODEV;
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/* Update the pgtable base address register of the M4U HW */
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if (!data->m4u_dom) {
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data->m4u_dom = dom;
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writel(dom->cfg.arm_v7s_cfg.ttbr[0],
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data->base + REG_MMU_PT_BASE_ADDR);
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}
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mtk_iommu_config(data, dev, true);
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return 0;
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}
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static void mtk_iommu_detach_device(struct iommu_domain *domain,
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struct device *dev)
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{
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struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
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if (!data)
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return;
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mtk_iommu_config(data, dev, false);
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}
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static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
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phys_addr_t paddr, size_t size, int prot)
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{
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struct mtk_iommu_domain *dom = to_mtk_domain(domain);
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&dom->pgtlock, flags);
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ret = dom->iop->map(dom->iop, iova, paddr & DMA_BIT_MASK(32),
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size, prot);
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spin_unlock_irqrestore(&dom->pgtlock, flags);
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return ret;
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}
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static size_t mtk_iommu_unmap(struct iommu_domain *domain,
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unsigned long iova, size_t size)
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{
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struct mtk_iommu_domain *dom = to_mtk_domain(domain);
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unsigned long flags;
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size_t unmapsz;
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spin_lock_irqsave(&dom->pgtlock, flags);
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unmapsz = dom->iop->unmap(dom->iop, iova, size);
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spin_unlock_irqrestore(&dom->pgtlock, flags);
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return unmapsz;
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}
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static void mtk_iommu_iotlb_sync(struct iommu_domain *domain)
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{
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mtk_iommu_tlb_sync(mtk_iommu_get_m4u_data());
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}
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static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
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dma_addr_t iova)
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{
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struct mtk_iommu_domain *dom = to_mtk_domain(domain);
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struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
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unsigned long flags;
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phys_addr_t pa;
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spin_lock_irqsave(&dom->pgtlock, flags);
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pa = dom->iop->iova_to_phys(dom->iop, iova);
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spin_unlock_irqrestore(&dom->pgtlock, flags);
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if (data->enable_4GB)
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pa |= BIT_ULL(32);
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return pa;
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}
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static int mtk_iommu_add_device(struct device *dev)
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{
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struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
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struct mtk_iommu_data *data;
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struct iommu_group *group;
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if (!fwspec || fwspec->ops != &mtk_iommu_ops)
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return -ENODEV; /* Not a iommu client device */
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data = fwspec->iommu_priv;
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iommu_device_link(&data->iommu, dev);
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group = iommu_group_get_for_dev(dev);
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if (IS_ERR(group))
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return PTR_ERR(group);
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iommu_group_put(group);
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return 0;
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}
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static void mtk_iommu_remove_device(struct device *dev)
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{
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struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
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struct mtk_iommu_data *data;
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if (!fwspec || fwspec->ops != &mtk_iommu_ops)
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return;
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data = fwspec->iommu_priv;
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iommu_device_unlink(&data->iommu, dev);
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iommu_group_remove_device(dev);
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iommu_fwspec_free(dev);
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}
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static struct iommu_group *mtk_iommu_device_group(struct device *dev)
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{
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struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
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if (!data)
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return ERR_PTR(-ENODEV);
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/* All the client devices are in the same m4u iommu-group */
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if (!data->m4u_group) {
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data->m4u_group = iommu_group_alloc();
|
|
if (IS_ERR(data->m4u_group))
|
|
dev_err(dev, "Failed to allocate M4U IOMMU group\n");
|
|
} else {
|
|
iommu_group_ref_get(data->m4u_group);
|
|
}
|
|
return data->m4u_group;
|
|
}
|
|
|
|
static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
|
|
{
|
|
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
|
|
struct platform_device *m4updev;
|
|
|
|
if (args->args_count != 1) {
|
|
dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n",
|
|
args->args_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!fwspec->iommu_priv) {
|
|
/* Get the m4u device */
|
|
m4updev = of_find_device_by_node(args->np);
|
|
if (WARN_ON(!m4updev))
|
|
return -EINVAL;
|
|
|
|
fwspec->iommu_priv = platform_get_drvdata(m4updev);
|
|
}
|
|
|
|
return iommu_fwspec_add_ids(dev, args->args, 1);
|
|
}
|
|
|
|
static const struct iommu_ops mtk_iommu_ops = {
|
|
.domain_alloc = mtk_iommu_domain_alloc,
|
|
.domain_free = mtk_iommu_domain_free,
|
|
.attach_dev = mtk_iommu_attach_device,
|
|
.detach_dev = mtk_iommu_detach_device,
|
|
.map = mtk_iommu_map,
|
|
.unmap = mtk_iommu_unmap,
|
|
.flush_iotlb_all = mtk_iommu_iotlb_sync,
|
|
.iotlb_sync = mtk_iommu_iotlb_sync,
|
|
.iova_to_phys = mtk_iommu_iova_to_phys,
|
|
.add_device = mtk_iommu_add_device,
|
|
.remove_device = mtk_iommu_remove_device,
|
|
.device_group = mtk_iommu_device_group,
|
|
.of_xlate = mtk_iommu_of_xlate,
|
|
.pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
|
|
};
|
|
|
|
static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
|
|
{
|
|
u32 regval;
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(data->bclk);
|
|
if (ret) {
|
|
dev_err(data->dev, "Failed to enable iommu bclk(%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
regval = F_MMU_TF_PROTECT_SEL(2, data);
|
|
if (data->m4u_plat == M4U_MT8173)
|
|
regval |= F_MMU_PREFETCH_RT_REPLACE_MOD;
|
|
writel_relaxed(regval, data->base + REG_MMU_CTRL_REG);
|
|
|
|
regval = F_L2_MULIT_HIT_EN |
|
|
F_TABLE_WALK_FAULT_INT_EN |
|
|
F_PREETCH_FIFO_OVERFLOW_INT_EN |
|
|
F_MISS_FIFO_OVERFLOW_INT_EN |
|
|
F_PREFETCH_FIFO_ERR_INT_EN |
|
|
F_MISS_FIFO_ERR_INT_EN;
|
|
writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0);
|
|
|
|
regval = F_INT_TRANSLATION_FAULT |
|
|
F_INT_MAIN_MULTI_HIT_FAULT |
|
|
F_INT_INVALID_PA_FAULT |
|
|
F_INT_ENTRY_REPLACEMENT_FAULT |
|
|
F_INT_TLB_MISS_FAULT |
|
|
F_INT_MISS_TRANSACTION_FIFO_FAULT |
|
|
F_INT_PRETETCH_TRANSATION_FIFO_FAULT;
|
|
writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL);
|
|
|
|
if (data->m4u_plat == M4U_MT8173)
|
|
regval = (data->protect_base >> 1) | (data->enable_4GB << 31);
|
|
else
|
|
regval = lower_32_bits(data->protect_base) |
|
|
upper_32_bits(data->protect_base);
|
|
writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR);
|
|
|
|
if (data->enable_4GB && data->m4u_plat != M4U_MT8173) {
|
|
/*
|
|
* If 4GB mode is enabled, the validate PA range is from
|
|
* 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30].
|
|
*/
|
|
regval = F_MMU_VLD_PA_RNG(7, 4);
|
|
writel_relaxed(regval, data->base + REG_MMU_VLD_PA_RNG);
|
|
}
|
|
writel_relaxed(0, data->base + REG_MMU_DCM_DIS);
|
|
|
|
/* It's MISC control register whose default value is ok except mt8173.*/
|
|
if (data->m4u_plat == M4U_MT8173)
|
|
writel_relaxed(0, data->base + REG_MMU_STANDARD_AXI_MODE);
|
|
|
|
if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0,
|
|
dev_name(data->dev), (void *)data)) {
|
|
writel_relaxed(0, data->base + REG_MMU_PT_BASE_ADDR);
|
|
clk_disable_unprepare(data->bclk);
|
|
dev_err(data->dev, "Failed @ IRQ-%d Request\n", data->irq);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct component_master_ops mtk_iommu_com_ops = {
|
|
.bind = mtk_iommu_bind,
|
|
.unbind = mtk_iommu_unbind,
|
|
};
|
|
|
|
static int mtk_iommu_probe(struct platform_device *pdev)
|
|
{
|
|
struct mtk_iommu_data *data;
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res;
|
|
resource_size_t ioaddr;
|
|
struct component_match *match = NULL;
|
|
void *protect;
|
|
int i, larb_nr, ret;
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
data->dev = dev;
|
|
data->m4u_plat = (enum mtk_iommu_plat)of_device_get_match_data(dev);
|
|
|
|
/* Protect memory. HW will access here while translation fault.*/
|
|
protect = devm_kzalloc(dev, MTK_PROTECT_PA_ALIGN * 2, GFP_KERNEL);
|
|
if (!protect)
|
|
return -ENOMEM;
|
|
data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN);
|
|
|
|
/* Whether the current dram is over 4GB */
|
|
data->enable_4GB = !!(max_pfn > (BIT_ULL(32) >> PAGE_SHIFT));
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
data->base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(data->base))
|
|
return PTR_ERR(data->base);
|
|
ioaddr = res->start;
|
|
|
|
data->irq = platform_get_irq(pdev, 0);
|
|
if (data->irq < 0)
|
|
return data->irq;
|
|
|
|
data->bclk = devm_clk_get(dev, "bclk");
|
|
if (IS_ERR(data->bclk))
|
|
return PTR_ERR(data->bclk);
|
|
|
|
larb_nr = of_count_phandle_with_args(dev->of_node,
|
|
"mediatek,larbs", NULL);
|
|
if (larb_nr < 0)
|
|
return larb_nr;
|
|
data->smi_imu.larb_nr = larb_nr;
|
|
|
|
for (i = 0; i < larb_nr; i++) {
|
|
struct device_node *larbnode;
|
|
struct platform_device *plarbdev;
|
|
u32 id;
|
|
|
|
larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
|
|
if (!larbnode)
|
|
return -EINVAL;
|
|
|
|
if (!of_device_is_available(larbnode))
|
|
continue;
|
|
|
|
ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id);
|
|
if (ret)/* The id is consecutive if there is no this property */
|
|
id = i;
|
|
|
|
plarbdev = of_find_device_by_node(larbnode);
|
|
if (!plarbdev)
|
|
return -EPROBE_DEFER;
|
|
data->smi_imu.larb_imu[id].dev = &plarbdev->dev;
|
|
|
|
component_match_add_release(dev, &match, release_of,
|
|
compare_of, larbnode);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
ret = mtk_iommu_hw_init(data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = iommu_device_sysfs_add(&data->iommu, dev, NULL,
|
|
"mtk-iommu.%pa", &ioaddr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
iommu_device_set_ops(&data->iommu, &mtk_iommu_ops);
|
|
iommu_device_set_fwnode(&data->iommu, &pdev->dev.of_node->fwnode);
|
|
|
|
ret = iommu_device_register(&data->iommu);
|
|
if (ret)
|
|
return ret;
|
|
|
|
list_add_tail(&data->list, &m4ulist);
|
|
|
|
if (!iommu_present(&platform_bus_type))
|
|
bus_set_iommu(&platform_bus_type, &mtk_iommu_ops);
|
|
|
|
return component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
|
|
}
|
|
|
|
static int mtk_iommu_remove(struct platform_device *pdev)
|
|
{
|
|
struct mtk_iommu_data *data = platform_get_drvdata(pdev);
|
|
|
|
iommu_device_sysfs_remove(&data->iommu);
|
|
iommu_device_unregister(&data->iommu);
|
|
|
|
if (iommu_present(&platform_bus_type))
|
|
bus_set_iommu(&platform_bus_type, NULL);
|
|
|
|
clk_disable_unprepare(data->bclk);
|
|
devm_free_irq(&pdev->dev, data->irq, data);
|
|
component_master_del(&pdev->dev, &mtk_iommu_com_ops);
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused mtk_iommu_suspend(struct device *dev)
|
|
{
|
|
struct mtk_iommu_data *data = dev_get_drvdata(dev);
|
|
struct mtk_iommu_suspend_reg *reg = &data->reg;
|
|
void __iomem *base = data->base;
|
|
|
|
reg->standard_axi_mode = readl_relaxed(base +
|
|
REG_MMU_STANDARD_AXI_MODE);
|
|
reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS);
|
|
reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG);
|
|
reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0);
|
|
reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
|
|
reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR);
|
|
clk_disable_unprepare(data->bclk);
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused mtk_iommu_resume(struct device *dev)
|
|
{
|
|
struct mtk_iommu_data *data = dev_get_drvdata(dev);
|
|
struct mtk_iommu_suspend_reg *reg = &data->reg;
|
|
void __iomem *base = data->base;
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(data->bclk);
|
|
if (ret) {
|
|
dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret);
|
|
return ret;
|
|
}
|
|
writel_relaxed(reg->standard_axi_mode,
|
|
base + REG_MMU_STANDARD_AXI_MODE);
|
|
writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS);
|
|
writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG);
|
|
writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0);
|
|
writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL);
|
|
writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
|
|
if (data->m4u_dom)
|
|
writel(data->m4u_dom->cfg.arm_v7s_cfg.ttbr[0],
|
|
base + REG_MMU_PT_BASE_ADDR);
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops mtk_iommu_pm_ops = {
|
|
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume)
|
|
};
|
|
|
|
static const struct of_device_id mtk_iommu_of_ids[] = {
|
|
{ .compatible = "mediatek,mt2712-m4u", .data = (void *)M4U_MT2712},
|
|
{ .compatible = "mediatek,mt8173-m4u", .data = (void *)M4U_MT8173},
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver mtk_iommu_driver = {
|
|
.probe = mtk_iommu_probe,
|
|
.remove = mtk_iommu_remove,
|
|
.driver = {
|
|
.name = "mtk-iommu",
|
|
.of_match_table = of_match_ptr(mtk_iommu_of_ids),
|
|
.pm = &mtk_iommu_pm_ops,
|
|
}
|
|
};
|
|
|
|
static int __init mtk_iommu_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&mtk_iommu_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register MTK IOMMU driver\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
subsys_initcall(mtk_iommu_init)
|