From patchwork Fri May 1 21:46:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 220057 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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,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 A1562C47259 for ; Fri, 1 May 2020 21:46:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79F592166E for ; Fri, 1 May 2020 21:46:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="mQEbCFSG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726960AbgEAVqg (ORCPT ); Fri, 1 May 2020 17:46:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726742AbgEAVqe (ORCPT ); Fri, 1 May 2020 17:46:34 -0400 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E27E9C08ED7D for ; Fri, 1 May 2020 14:46:33 -0700 (PDT) Received: by mail-qt1-x842.google.com with SMTP id g16so5093379qtp.11 for ; Fri, 01 May 2020 14:46:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=8gxTSUogDwuGLJulsmZ9RxF75CEfaqEdykWJgqsyHRs=; b=mQEbCFSG03FogeRAqzrIa13/XN1kbi5D36jDNukOmTu+o7J6EmE3NP2IKE+WPGx+0g bTQmHp2wZhUHtfw2mINbOZ1dZYOCazzFF1BI1FmmISZnM1ZJVMGCr0YXGbxU+nbjrVcE Qc5JwRo+yzKNBcg3vXMQEDn43yD0Z8OmqhX+t9E+VnurbZkiQdUGEZlgiKufJdQ/lxYb pKOvZ2bRvzzpHN1THbRMkZT3Wjfl59tHqNdw1mzlge1OzLMLkNmNJXMnt1xXSXAJ4DLy WYVofSHGHa1VvXWqdZAsGvPMP+fF1nKqH/QdoGNbdQr7BzPjnf4cRtZ1OlClxyootJEf rpUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=8gxTSUogDwuGLJulsmZ9RxF75CEfaqEdykWJgqsyHRs=; b=ESfCXa/rckqSYbZiVGYA4snYVdtNUk47StHtHUUlWW5Aw36by1XZL0UwAz3kMGH6OP J32aBPBKbBzgGdkkhcJu1LhRblPtE1LZjqC2SOzjc64Ruz2tInHjG8OBrDWNXQ5DGufo FGyXNQgrQVgJyTJKRt4u3iQ4NFQOG59Q9CHb0TWCY10ES9su/yBgIEpkv/yw4dj0P2Oh 3zJ8S/UVRg0aOgbkU4E1taJjI8N6rM080/0Wuwu7UaXbm7dr4SAnnHtYZwq+q11VFAI0 dfHP30Aap8AgRvwhnoSh1rvCmijmnst8cNY43YK8ax9EUfTRK7oPlvb6CdSTCRGuhZQJ m+bg== X-Gm-Message-State: AGi0PuZWT/GZiV3symTroP/TsCCkkAL/uKNEQ76Xz6Hf71VduJxtpnBj UkYDCiJmWFL+kmfHOqN7X9BWfsV1BnY= X-Google-Smtp-Source: APiQypIIqwtR3OM/3zGi5DIPfwsyDFHMqqlj+kjboPAogLyhmOkseCui/dghUIqb4bkEfE9iB3tLOg== X-Received: by 2002:ac8:46d0:: with SMTP id h16mr6146683qto.242.1588369593085; Fri, 01 May 2020 14:46:33 -0700 (PDT) Received: from beast.localdomain (c-73-185-129-58.hsd1.mn.comcast.net. [73.185.129.58]) by smtp.gmail.com with ESMTPSA id z18sm3470982qti.47.2020.05.01.14.46.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2020 14:46:32 -0700 (PDT) From: Alex Elder To: davem@davemloft.net Cc: evgreen@chromium.org.net, subashab@codeaurora.org, cpratapa@codeaurora.org, bjorn.andersson@linaro.org, agross@kernel.org, robh+dt@kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH net-next 2/4] net: ipa: redefine struct ipa_mem_data Date: Fri, 1 May 2020 16:46:23 -0500 Message-Id: <20200501214625.31539-3-elder@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200501214625.31539-1-elder@linaro.org> References: <20200501214625.31539-1-elder@linaro.org> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The ipa_mem_data structure type was never actually used. Instead, the IPA memory regions were defined using the ipa_mem structure. Redefine struct ipa_mem_data so it encapsulates the array of IPA-local memory region descriptors along with the count of entries in that array. Pass just an ipa_mem structure pointer to ipa_mem_init(). Rename the ipa_mem_data[] array ipa_mem_local_data[] to emphasize that the memory regions it defines are IPA-local memory. Signed-off-by: Alex Elder --- drivers/net/ipa/ipa_data-sc7180.c | 10 +++++++--- drivers/net/ipa/ipa_data-sdm845.c | 10 +++++++--- drivers/net/ipa/ipa_data.h | 13 +++++-------- drivers/net/ipa/ipa_main.c | 2 +- drivers/net/ipa/ipa_mem.c | 9 +++++---- drivers/net/ipa/ipa_mem.h | 3 ++- 6 files changed, 27 insertions(+), 20 deletions(-) diff --git a/drivers/net/ipa/ipa_data-sc7180.c b/drivers/net/ipa/ipa_data-sc7180.c index 042b5fc3c135..f97e7e4e61c1 100644 --- a/drivers/net/ipa/ipa_data-sc7180.c +++ b/drivers/net/ipa/ipa_data-sc7180.c @@ -193,7 +193,7 @@ static const struct ipa_resource_data ipa_resource_data = { }; /* IPA-resident memory region configuration for the SC7180 SoC. */ -static const struct ipa_mem ipa_mem_data[] = { +static const struct ipa_mem ipa_mem_local_data[] = { [IPA_MEM_UC_SHARED] = { .offset = 0x0000, .size = 0x0080, @@ -296,12 +296,16 @@ static const struct ipa_mem ipa_mem_data[] = { }, }; +static struct ipa_mem_data ipa_mem_data = { + .local_count = ARRAY_SIZE(ipa_mem_local_data), + .local = ipa_mem_local_data, +}; + /* Configuration data for the SC7180 SoC. */ const struct ipa_data ipa_data_sc7180 = { .version = IPA_VERSION_4_2, .endpoint_count = ARRAY_SIZE(ipa_gsi_endpoint_data), .endpoint_data = ipa_gsi_endpoint_data, .resource_data = &ipa_resource_data, - .mem_count = ARRAY_SIZE(ipa_mem_data), - .mem_data = ipa_mem_data, + .mem_data = &ipa_mem_data, }; diff --git a/drivers/net/ipa/ipa_data-sdm845.c b/drivers/net/ipa/ipa_data-sdm845.c index 0d9c36e1e806..c55507e94559 100644 --- a/drivers/net/ipa/ipa_data-sdm845.c +++ b/drivers/net/ipa/ipa_data-sdm845.c @@ -235,7 +235,7 @@ static const struct ipa_resource_data ipa_resource_data = { }; /* IPA-resident memory region configuration for the SDM845 SoC. */ -static const struct ipa_mem ipa_mem_data[] = { +static const struct ipa_mem ipa_mem_local_data[] = { [IPA_MEM_UC_SHARED] = { .offset = 0x0000, .size = 0x0080, @@ -318,12 +318,16 @@ static const struct ipa_mem ipa_mem_data[] = { }, }; +static struct ipa_mem_data ipa_mem_data = { + .local_count = ARRAY_SIZE(ipa_mem_local_data), + .local = ipa_mem_local_data, +}; + /* Configuration data for the SDM845 SoC. */ const struct ipa_data ipa_data_sdm845 = { .version = IPA_VERSION_3_5_1, .endpoint_count = ARRAY_SIZE(ipa_gsi_endpoint_data), .endpoint_data = ipa_gsi_endpoint_data, .resource_data = &ipa_resource_data, - .mem_count = ARRAY_SIZE(ipa_mem_data), - .mem_data = ipa_mem_data, + .mem_data = &ipa_mem_data, }; diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h index 7110de2de817..51d8e5a6f23a 100644 --- a/drivers/net/ipa/ipa_data.h +++ b/drivers/net/ipa/ipa_data.h @@ -246,14 +246,12 @@ struct ipa_resource_data { /** * struct ipa_mem - IPA-local memory region description - * @offset: offset in IPA memory space to base of the region - * @size: size in bytes base of the region - * @canary_count: number of 32-bit "canary" values that precede region + * @local_count: number of regions defined in the local[] array + * @local: array of IPA-local memory region descriptors */ struct ipa_mem_data { - u32 offset; - u16 size; - u16 canary_count; + u32 local_count; + const struct ipa_mem *local; }; /** @@ -270,8 +268,7 @@ struct ipa_data { u32 endpoint_count; /* # entries in endpoint_data[] */ const struct ipa_gsi_endpoint_data *endpoint_data; const struct ipa_resource_data *resource_data; - u32 mem_count; /* # entries in mem_data[] */ - const struct ipa_mem *mem_data; + const struct ipa_mem_data *mem_data; }; extern const struct ipa_data ipa_data_sdm845; diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c index 28998dcce3d2..9295a9122e8e 100644 --- a/drivers/net/ipa/ipa_main.c +++ b/drivers/net/ipa/ipa_main.c @@ -778,7 +778,7 @@ static int ipa_probe(struct platform_device *pdev) if (ret) goto err_kfree_ipa; - ret = ipa_mem_init(ipa, data->mem_count, data->mem_data); + ret = ipa_mem_init(ipa, data->mem_data); if (ret) goto err_reg_exit; diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c index 42d2c29d9f0c..fb4de2a12796 100644 --- a/drivers/net/ipa/ipa_mem.c +++ b/drivers/net/ipa/ipa_mem.c @@ -12,6 +12,7 @@ #include "ipa.h" #include "ipa_reg.h" +#include "ipa_data.h" #include "ipa_cmd.h" #include "ipa_mem.h" #include "ipa_data.h" @@ -266,15 +267,15 @@ int ipa_mem_zero_modem(struct ipa *ipa) } /* Perform memory region-related initialization */ -int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem) +int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data) { struct device *dev = &ipa->pdev->dev; struct resource *res; int ret; - if (count > IPA_MEM_COUNT) { + if (mem_data->local_count > IPA_MEM_COUNT) { dev_err(dev, "to many memory regions (%u > %u)\n", - count, IPA_MEM_COUNT); + mem_data->local_count, IPA_MEM_COUNT); return -EINVAL; } @@ -302,7 +303,7 @@ int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem) ipa->mem_size = resource_size(res); /* The ipa->mem[] array is indexed by enum ipa_mem_id values */ - ipa->mem = mem; + ipa->mem = mem_data->local; return 0; } diff --git a/drivers/net/ipa/ipa_mem.h b/drivers/net/ipa/ipa_mem.h index 065cb499ebe5..f99180f84f0d 100644 --- a/drivers/net/ipa/ipa_mem.h +++ b/drivers/net/ipa/ipa_mem.h @@ -7,6 +7,7 @@ #define _IPA_MEM_H_ struct ipa; +struct ipa_mem_data; /** * DOC: IPA Local Memory @@ -84,7 +85,7 @@ void ipa_mem_teardown(struct ipa *ipa); int ipa_mem_zero_modem(struct ipa *ipa); -int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem); +int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data); void ipa_mem_exit(struct ipa *ipa); #endif /* _IPA_MEM_H_ */ From patchwork Fri May 1 21:46:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 220056 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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 F12F9C47259 for ; Fri, 1 May 2020 21:46:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C634B2166E for ; Fri, 1 May 2020 21:46:49 +0000 (UTC) Authentication-Results: mail.kernel.org; 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[73.185.129.58]) by smtp.gmail.com with ESMTPSA id z18sm3470982qti.47.2020.05.01.14.46.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2020 14:46:34 -0700 (PDT) From: Alex Elder To: davem@davemloft.net Cc: evgreen@chromium.org.net, subashab@codeaurora.org, cpratapa@codeaurora.org, bjorn.andersson@linaro.org, agross@kernel.org, robh+dt@kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH net-next 3/4] net: ipa: define IMEM memory region for IPA Date: Fri, 1 May 2020 16:46:24 -0500 Message-Id: <20200501214625.31539-4-elder@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200501214625.31539-1-elder@linaro.org> References: <20200501214625.31539-1-elder@linaro.org> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Define a region of IMEM memory available for use by IPA in the platform configuration data. Initialize it from ipa_mem_init(). The memory must be mapped for access through an SMMU. Signed-off-by: Alex Elder --- drivers/net/ipa/ipa.h | 5 ++ drivers/net/ipa/ipa_data-sc7180.c | 2 + drivers/net/ipa/ipa_data-sdm845.c | 2 + drivers/net/ipa/ipa_data.h | 6 ++- drivers/net/ipa/ipa_mem.c | 84 +++++++++++++++++++++++++++++++ 5 files changed, 98 insertions(+), 1 deletion(-) diff --git a/drivers/net/ipa/ipa.h b/drivers/net/ipa/ipa.h index 23fb29889e5a..32f6dfafdb05 100644 --- a/drivers/net/ipa/ipa.h +++ b/drivers/net/ipa/ipa.h @@ -47,6 +47,8 @@ struct ipa_interrupt; * @mem_offset: Offset from @mem_virt used for access to IPA memory * @mem_size: Total size (bytes) of memory at @mem_virt * @mem: Array of IPA-local memory region descriptors + * @imem_iova: I/O virtual address of IPA region in IMEM + * @imem_size; Size of IMEM region * @zero_addr: DMA address of preallocated zero-filled memory * @zero_virt: Virtual address of preallocated zero-filled memory * @zero_size: Size (bytes) of preallocated zero-filled memory @@ -88,6 +90,9 @@ struct ipa { u32 mem_size; const struct ipa_mem *mem; + unsigned long imem_iova; + size_t imem_size; + dma_addr_t zero_addr; void *zero_virt; size_t zero_size; diff --git a/drivers/net/ipa/ipa_data-sc7180.c b/drivers/net/ipa/ipa_data-sc7180.c index f97e7e4e61c1..e9007d151c68 100644 --- a/drivers/net/ipa/ipa_data-sc7180.c +++ b/drivers/net/ipa/ipa_data-sc7180.c @@ -299,6 +299,8 @@ static const struct ipa_mem ipa_mem_local_data[] = { static struct ipa_mem_data ipa_mem_data = { .local_count = ARRAY_SIZE(ipa_mem_local_data), .local = ipa_mem_local_data, + .imem_addr = 0x146a8000, + .imem_size = 0x00002000, }; /* Configuration data for the SC7180 SoC. */ diff --git a/drivers/net/ipa/ipa_data-sdm845.c b/drivers/net/ipa/ipa_data-sdm845.c index c55507e94559..c0e207085550 100644 --- a/drivers/net/ipa/ipa_data-sdm845.c +++ b/drivers/net/ipa/ipa_data-sdm845.c @@ -321,6 +321,8 @@ static const struct ipa_mem ipa_mem_local_data[] = { static struct ipa_mem_data ipa_mem_data = { .local_count = ARRAY_SIZE(ipa_mem_local_data), .local = ipa_mem_local_data, + .imem_addr = 0x146bd000, + .imem_size = 0x00002000, }; /* Configuration data for the SDM845 SoC. */ diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h index 51d8e5a6f23a..69957af56ccd 100644 --- a/drivers/net/ipa/ipa_data.h +++ b/drivers/net/ipa/ipa_data.h @@ -245,13 +245,17 @@ struct ipa_resource_data { }; /** - * struct ipa_mem - IPA-local memory region description + * struct ipa_mem - description of IPA memory regions * @local_count: number of regions defined in the local[] array * @local: array of IPA-local memory region descriptors + * @imem_addr: physical address of IPA region within IMEM + * @imem_size: size in bytes of IPA IMEM region */ struct ipa_mem_data { u32 local_count; const struct ipa_mem *local; + u32 imem_addr; + u32 imem_size; }; /** diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c index fb4de2a12796..3c0916597fe1 100644 --- a/drivers/net/ipa/ipa_mem.c +++ b/drivers/net/ipa/ipa_mem.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include "ipa.h" @@ -266,6 +267,79 @@ int ipa_mem_zero_modem(struct ipa *ipa) return 0; } +/** + * ipa_imem_init() - Initialize IMEM memory used by the IPA + * @ipa: IPA pointer + * @addr: Physical address of the IPA region in IMEM + * @size: Size (bytes) of the IPA region in IMEM + * + * IMEM is a block of shared memory separate from system DRAM, and + * a portion of this memory is available for the IPA to use. The + * modem accesses this memory directly, but the IPA accesses it + * via the IOMMU, using the AP's credentials. + * + * If this region exists (size > 0) we map it for read/write access + * through the IOMMU using the IPA device. + * + * Note: @addr and @size are not guaranteed to be page-aligned. + */ +static int ipa_imem_init(struct ipa *ipa, unsigned long addr, size_t size) +{ + struct device *dev = &ipa->pdev->dev; + struct iommu_domain *domain; + unsigned long iova; + phys_addr_t phys; + int ret; + + if (!size) + return 0; /* IMEM memory not used */ + + domain = iommu_get_domain_for_dev(dev); + if (!domain) { + dev_err(dev, "no IOMMU domain found for IMEM\n"); + return -EINVAL; + } + + /* Align the address down and the size up to page boundaries */ + phys = addr & PAGE_MASK; + size = PAGE_ALIGN(size + addr - phys); + iova = phys; /* We just want a direct mapping */ + + ret = iommu_map(domain, iova, phys, size, IOMMU_READ | IOMMU_WRITE); + if (ret) + return ret; + + ipa->imem_iova = iova; + ipa->imem_size = size; + + return 0; +} + +static void ipa_imem_exit(struct ipa *ipa) +{ + struct iommu_domain *domain; + struct device *dev; + + if (!ipa->imem_size) + return; + + dev = &ipa->pdev->dev; + domain = iommu_get_domain_for_dev(dev); + if (domain) { + size_t size; + + size = iommu_unmap(domain, ipa->imem_iova, ipa->imem_size); + if (size != ipa->imem_size) + dev_warn(dev, "unmapped %zu IMEM bytes, expected %lu\n", + size, ipa->imem_size); + } else { + dev_err(dev, "couldn't get IPA IOMMU domain for IMEM\n"); + } + + ipa->imem_size = 0; + ipa->imem_iova = 0; +} + /* Perform memory region-related initialization */ int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data) { @@ -305,11 +379,21 @@ int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data) /* The ipa->mem[] array is indexed by enum ipa_mem_id values */ ipa->mem = mem_data->local; + ret = ipa_imem_init(ipa, mem_data->imem_addr, mem_data->imem_size); + if (ret) + goto err_unmap; + return 0; + +err_unmap: + memunmap(ipa->mem_virt); + + return ret; } /* Inverse of ipa_mem_init() */ void ipa_mem_exit(struct ipa *ipa) { + ipa_imem_exit(ipa); memunmap(ipa->mem_virt); }