From patchwork Tue Nov 17 14:30:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sai Prakash Ranjan X-Patchwork-Id: 11914061 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 49000C56202 for ; Wed, 18 Nov 2020 08:01:44 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C4604223C7 for ; Wed, 18 Nov 2020 08:01:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="G0nCE0bR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4604223C7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 78EF36E3F9; Wed, 18 Nov 2020 08:01:24 +0000 (UTC) Received: from z5.mailgun.us (z5.mailgun.us [104.130.96.5]) by gabe.freedesktop.org (Postfix) with ESMTPS id 115366EA98 for ; Tue, 17 Nov 2020 14:32:16 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1605623537; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=5cMiLOwjnXkXLEoeEW3HBR1e+Az/sjHxgoRRiQBvOOA=; b=G0nCE0bRwngT60m6LHj0fjnauOU9fguh9jnlnasccPR1rBqgikFp1doClxghMSlmVjB+l1vG 0YakhplgJANlZKudOOFKt0rYK+qRphjfn90FYav6Yo04HygdWMesojJw66wlNi6ohNaZyzIU o325qz/p49GVOtJNSthI0sAIn0s= X-Mailgun-Sending-Ip: 104.130.96.5 X-Mailgun-Sid: WyJkOTU5ZSIsICJkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n10.prod.us-east-1.postgun.com with SMTP id 5fb3ded207fe4e8a182491a1 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 17 Nov 2020 14:31:46 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 58931C433C6; Tue, 17 Nov 2020 14:31:45 +0000 (UTC) Received: from blr-ubuntu-253.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: saiprakash.ranjan) by smtp.codeaurora.org (Postfix) with ESMTPSA id BB47BC43460; Tue, 17 Nov 2020 14:31:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BB47BC43460 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=saiprakash.ranjan@codeaurora.org From: Sai Prakash Ranjan To: Will Deacon , Robin Murphy , Joerg Roedel , Jordan Crouse , Rob Clark Subject: [PATCHv8 6/8] drm/msm/a6xx: Add support for using system cache on MMU500 based targets Date: Tue, 17 Nov 2020 20:00:45 +0530 Message-Id: <1ceab1d57e4846a0f4179afe769ad1adc463758b.1605621785.git.saiprakash.ranjan@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 18 Nov 2020 08:01:05 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sai Prakash Ranjan , linux-arm-msm@vger.kernel.org, Akhil P Oommen , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, "Kristian H . Kristensen" , freedreno@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Jordan Crouse GPU targets with an MMU-500 attached have a slightly different process for enabling system cache. Use the compatible string on the IOMMU phandle to see if an MMU-500 is attached and modify the programming sequence accordingly. Signed-off-by: Jordan Crouse Signed-off-by: Sai Prakash Ranjan --- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 46 +++++++++++++++++++++------ drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 1 + 2 files changed, 37 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index 95c98c642876..3f8b92da8cba 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -1042,6 +1042,8 @@ static void a6xx_llc_deactivate(struct a6xx_gpu *a6xx_gpu) static void a6xx_llc_activate(struct a6xx_gpu *a6xx_gpu) { + struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; + struct msm_gpu *gpu = &adreno_gpu->base; u32 cntl1_regval = 0; if (IS_ERR(a6xx_gpu->llc_mmio)) @@ -1055,11 +1057,17 @@ static void a6xx_llc_activate(struct a6xx_gpu *a6xx_gpu) (gpu_scid << 15) | (gpu_scid << 20); } + /* + * For targets with a MMU500, activate the slice but don't program the + * register. The XBL will take care of that. + */ if (!llcc_slice_activate(a6xx_gpu->htw_llc_slice)) { - u32 gpuhtw_scid = llcc_get_slice_id(a6xx_gpu->htw_llc_slice); + if (!a6xx_gpu->have_mmu500) { + u32 gpuhtw_scid = llcc_get_slice_id(a6xx_gpu->htw_llc_slice); - gpuhtw_scid &= 0x1f; - cntl1_regval |= FIELD_PREP(GENMASK(29, 25), gpuhtw_scid); + gpuhtw_scid &= 0x1f; + cntl1_regval |= FIELD_PREP(GENMASK(29, 25), gpuhtw_scid); + } } if (cntl1_regval) { @@ -1067,13 +1075,20 @@ static void a6xx_llc_activate(struct a6xx_gpu *a6xx_gpu) * Program the slice IDs for the various GPU blocks and GPU MMU * pagetables */ - a6xx_llc_write(a6xx_gpu, REG_A6XX_CX_MISC_SYSTEM_CACHE_CNTL_1, cntl1_regval); - - /* - * Program cacheability overrides to not allocate cache lines on - * a write miss - */ - a6xx_llc_rmw(a6xx_gpu, REG_A6XX_CX_MISC_SYSTEM_CACHE_CNTL_0, 0xF, 0x03); + if (a6xx_gpu->have_mmu500) + gpu_rmw(gpu, REG_A6XX_GBIF_SCACHE_CNTL1, GENMASK(24, 0), + cntl1_regval); + else { + a6xx_llc_write(a6xx_gpu, + REG_A6XX_CX_MISC_SYSTEM_CACHE_CNTL_1, cntl1_regval); + + /* + * Program cacheability overrides to not allocate cache + * lines on a write miss + */ + a6xx_llc_rmw(a6xx_gpu, + REG_A6XX_CX_MISC_SYSTEM_CACHE_CNTL_0, 0xF, 0x03); + } } } @@ -1086,10 +1101,21 @@ static void a6xx_llc_slices_destroy(struct a6xx_gpu *a6xx_gpu) static void a6xx_llc_slices_init(struct platform_device *pdev, struct a6xx_gpu *a6xx_gpu) { + struct device_node *phandle; + a6xx_gpu->llc_mmio = msm_ioremap(pdev, "cx_mem", "gpu_cx"); if (IS_ERR(a6xx_gpu->llc_mmio)) return; + /* + * There is a different programming path for targets with an mmu500 + * attached, so detect if that is the case + */ + phandle = of_parse_phandle(pdev->dev.of_node, "iommus", 0); + a6xx_gpu->have_mmu500 = (phandle && + of_device_is_compatible(phandle, "arm,mmu-500")); + of_node_put(phandle); + a6xx_gpu->llc_slice = llcc_slice_getd(LLCC_GPU); a6xx_gpu->htw_llc_slice = llcc_slice_getd(LLCC_GPUHTW); diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h index 9e6079af679c..e793d329e77b 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h @@ -32,6 +32,7 @@ struct a6xx_gpu { void __iomem *llc_mmio; void *llc_slice; void *htw_llc_slice; + bool have_mmu500; }; #define to_a6xx_gpu(x) container_of(x, struct a6xx_gpu, base)