From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 843BFC433E9 for ; Sat, 16 Jan 2021 03:32:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4FBD8207DE for ; Sat, 16 Jan 2021 03:32:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729432AbhAPDcC (ORCPT ); Fri, 15 Jan 2021 22:32:02 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:11028 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727649AbhAPDcB (ORCPT ); Fri, 15 Jan 2021 22:32:01 -0500 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4DHk87620yzj7ZC; Sat, 16 Jan 2021 11:30:15 +0800 (CST) Received: from thunder-town.china.huawei.com (10.174.176.220) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.498.0; Sat, 16 Jan 2021 11:31:12 +0800 From: Zhen Lei To: Russell King , Greg Kroah-Hartman , Will Deacon , "Haojian Zhuang" , Arnd Bergmann , Rob Herring , Wei Xu , devicetree , linux-arm-kernel , linux-kernel CC: Zhen Lei Subject: [PATCH v5 4/4] ARM: Add support for Hisilicon Kunpeng L3 cache controller Date: Sat, 16 Jan 2021 11:27:40 +0800 Message-ID: <20210116032740.873-5-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20210116032740.873-1-thunder.leizhen@huawei.com> References: <20210116032740.873-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.174.176.220] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support for the Hisilicon Kunpeng L3 cache controller as used with Kunpeng506 and Kunpeng509 SoCs. These Hisilicon SoCs support LPAE, so the physical addresses is wider than 32-bits, but the actual bit width does not exceed 36 bits. When the cache operation is performed based on the address range, the upper 30 bits of the physical address are recorded in registers L3_MAINT_START and L3_MAINT_END, and ignore the lower 6 bits cacheline offset. Signed-off-by: Zhen Lei --- arch/arm/mm/Kconfig | 10 +++ arch/arm/mm/Makefile | 1 + arch/arm/mm/cache-kunpeng-l3.c | 153 +++++++++++++++++++++++++++++++++ arch/arm/mm/cache-kunpeng-l3.h | 30 +++++++ 4 files changed, 194 insertions(+) create mode 100644 arch/arm/mm/cache-kunpeng-l3.c create mode 100644 arch/arm/mm/cache-kunpeng-l3.h diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 02692fbe2db5c59..d2082503de053d2 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -1070,6 +1070,16 @@ config CACHE_XSC3L2 help This option enables the L2 cache on XScale3. +config CACHE_KUNPENG_L3 + bool "Enable the Hisilicon Kunpeng L3 cache controller" + depends on ARCH_KUNPENG50X && OF + default y + select OUTER_CACHE + help + This option enables the Kunpeng L3 cache controller on Hisilicon + Kunpeng506 and Kunpeng509 SoCs. It supports a maximum of 36-bit + physical addresses. + config ARM_L1_CACHE_SHIFT_6 bool default y if CPU_V7 diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile index 3510503bc5e688b..ececc5489e353eb 100644 --- a/arch/arm/mm/Makefile +++ b/arch/arm/mm/Makefile @@ -112,6 +112,7 @@ obj-$(CONFIG_CACHE_L2X0_PMU) += cache-l2x0-pmu.o obj-$(CONFIG_CACHE_XSC3L2) += cache-xsc3l2.o obj-$(CONFIG_CACHE_TAUROS2) += cache-tauros2.o obj-$(CONFIG_CACHE_UNIPHIER) += cache-uniphier.o +obj-$(CONFIG_CACHE_KUNPENG_L3) += cache-kunpeng-l3.o KASAN_SANITIZE_kasan_init.o := n obj-$(CONFIG_KASAN) += kasan_init.o diff --git a/arch/arm/mm/cache-kunpeng-l3.c b/arch/arm/mm/cache-kunpeng-l3.c new file mode 100644 index 000000000000000..cb81f15d26a0cf2 --- /dev/null +++ b/arch/arm/mm/cache-kunpeng-l3.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2021 Hisilicon Limited. + */ + +#include +#include +#include +#include + +#include + +#include "cache-kunpeng-l3.h" + +static DEFINE_SPINLOCK(l3cache_lock); +static void __iomem *l3_ctrl_base; + + +static void l3cache_maint_common(u32 range, u32 op_type) +{ + u32 reg; + + reg = readl(l3_ctrl_base + L3_MAINT_CTRL); + reg &= ~(L3_MAINT_RANGE_MASK | L3_MAINT_TYPE_MASK); + reg |= range | op_type; + reg |= L3_MAINT_STATUS_START; + writel(reg, l3_ctrl_base + L3_MAINT_CTRL); + + /* Wait until the hardware maintenance operation is complete. */ + do { + cpu_relax(); + reg = readl(l3_ctrl_base + L3_MAINT_CTRL); + } while ((reg & L3_MAINT_STATUS_MASK) != L3_MAINT_STATUS_END); +} + +static void l3cache_maint_range(phys_addr_t start, phys_addr_t end, u32 op_type) +{ + start = start >> L3_CACHE_LINE_SHITF; + end = ((end - 1) >> L3_CACHE_LINE_SHITF) + 1; + + writel(start, l3_ctrl_base + L3_MAINT_START); + writel(end, l3_ctrl_base + L3_MAINT_END); + + l3cache_maint_common(L3_MAINT_RANGE_ADDR, op_type); +} + +static inline void l3cache_flush_all_nolock(void) +{ + l3cache_maint_common(L3_MAINT_RANGE_ALL, L3_MAINT_TYPE_FLUSH); +} + +static void l3cache_flush_all(void) +{ + unsigned long flags; + + spin_lock_irqsave(&l3cache_lock, flags); + l3cache_flush_all_nolock(); + spin_unlock_irqrestore(&l3cache_lock, flags); +} + +static void l3cache_inv_range(phys_addr_t start, phys_addr_t end) +{ + unsigned long flags; + + spin_lock_irqsave(&l3cache_lock, flags); + l3cache_maint_range(start, end, L3_MAINT_TYPE_INV); + spin_unlock_irqrestore(&l3cache_lock, flags); +} + +static void l3cache_clean_range(phys_addr_t start, phys_addr_t end) +{ + unsigned long flags; + + spin_lock_irqsave(&l3cache_lock, flags); + l3cache_maint_range(start, end, L3_MAINT_TYPE_CLEAN); + spin_unlock_irqrestore(&l3cache_lock, flags); +} + +static void l3cache_flush_range(phys_addr_t start, phys_addr_t end) +{ + unsigned long flags; + + spin_lock_irqsave(&l3cache_lock, flags); + l3cache_maint_range(start, end, L3_MAINT_TYPE_FLUSH); + spin_unlock_irqrestore(&l3cache_lock, flags); +} + +static void l3cache_disable(void) +{ + unsigned long flags; + + spin_lock_irqsave(&l3cache_lock, flags); + l3cache_flush_all_nolock(); + writel(L3_CTRL_DISABLE, l3_ctrl_base + L3_CTRL); + spin_unlock_irqrestore(&l3cache_lock, flags); +} + +static const struct of_device_id l3cache_ids[] __initconst = { + {.compatible = "hisilicon,kunpeng-l3cache", .data = NULL}, + {} +}; + +static int __init l3cache_init(void) +{ + u32 reg; + struct device_node *node; + + node = of_find_matching_node(NULL, l3cache_ids); + if (!node) + return -ENODEV; + + l3_ctrl_base = of_iomap(node, 0); + if (!l3_ctrl_base) { + pr_err("failed to map Kunpeng L3 cache controller registers\n"); + return -ENOMEM; + } + + reg = readl(l3_ctrl_base + L3_CTRL); + if (!(reg & L3_CTRL_ENABLE)) { + unsigned long flags; + + spin_lock_irqsave(&l3cache_lock, flags); + + /* + * Ensure that no L3 cache hardware maintenance operations are + * being performed before enabling the L3 cache. Wait for it to + * finish. + */ + do { + cpu_relax(); + reg = readl(l3_ctrl_base + L3_MAINT_CTRL); + } while ((reg & L3_MAINT_STATUS_MASK) != L3_MAINT_STATUS_END); + + reg = readl(l3_ctrl_base + L3_AUCTRL); + reg |= L3_AUCTRL_EVENT_EN | L3_AUCTRL_ECC_EN; + writel(reg, l3_ctrl_base + L3_AUCTRL); + + writel(L3_CTRL_ENABLE, l3_ctrl_base + L3_CTRL); + + spin_unlock_irqrestore(&l3cache_lock, flags); + } + + outer_cache.inv_range = l3cache_inv_range; + outer_cache.clean_range = l3cache_clean_range; + outer_cache.flush_range = l3cache_flush_range; + outer_cache.flush_all = l3cache_flush_all; + outer_cache.disable = l3cache_disable; + + pr_info("Hisilicon Kunpeng L3 cache controller enabled\n"); + + return 0; +} +arch_initcall(l3cache_init); diff --git a/arch/arm/mm/cache-kunpeng-l3.h b/arch/arm/mm/cache-kunpeng-l3.h new file mode 100644 index 000000000000000..9ef6a53e7d4db49 --- /dev/null +++ b/arch/arm/mm/cache-kunpeng-l3.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __CACHE_KUNPENG_L3_H +#define __CACHE_KUNPENG_L3_H + +#define L3_CACHE_LINE_SHITF 6 + +#define L3_CTRL 0x0 +#define L3_CTRL_ENABLE (1U << 0) +#define L3_CTRL_DISABLE (0U << 0) + +#define L3_AUCTRL 0x4 +#define L3_AUCTRL_EVENT_EN BIT(23) +#define L3_AUCTRL_ECC_EN BIT(8) + +#define L3_MAINT_CTRL 0x20 +#define L3_MAINT_RANGE_MASK GENMASK(3, 3) +#define L3_MAINT_RANGE_ALL (0U << 3) +#define L3_MAINT_RANGE_ADDR (1U << 3) +#define L3_MAINT_TYPE_MASK GENMASK(2, 1) +#define L3_MAINT_TYPE_CLEAN (1U << 1) +#define L3_MAINT_TYPE_INV (2U << 1) +#define L3_MAINT_TYPE_FLUSH (3U << 1) +#define L3_MAINT_STATUS_MASK GENMASK(0, 0) +#define L3_MAINT_STATUS_START (1U << 0) +#define L3_MAINT_STATUS_END (0U << 0) + +#define L3_MAINT_START 0x24 +#define L3_MAINT_END 0x28 + +#endif -- 2.26.0.106.g9fadedd