From nobody Sat Feb 7 08:45:01 2026 Received: from mail-oo1-f52.google.com (mail-oo1-f52.google.com [209.85.161.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0DA5522FF53 for ; Thu, 6 Feb 2025 22:09:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879799; cv=none; b=HXvSfIQfvSvgCU5uiNkQ1PfUzGzQ2fpLIVwKuhum/hQBTp9yMLgIP9kmpzDz/3T7CVNgZCXmQBwWFPuo+LZzTA5tpBRvJwVjlwYlBrnTq/V5HLShUSLJsfhZxUE45+jIZ3RplhiKFcS5BCLOCELO6ABJr2zAfuRL7X8VsjL5Ar0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879799; c=relaxed/simple; bh=8NIjAIHYFxKWCF2W6XrSUEq4ekHKKAbksZGYa7TkqbI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=CRhFYlGgVHmBbUsQCBM24JkMpCQLgYlTMGcRD9dh/ThURrzXXqSVYDIrL/hDRCPh85dMQfq0PsQ+RVv5nmEdV35Yvw4+YMJ/Ons4LpdAfFoCZ5kFXpYNdxsFMzXg+SKAIpVeEGWDOJW9HHKG3pSjpHYcHM1t2vlK5CnhsH84BzY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=ZB5w+QQ5; arc=none smtp.client-ip=209.85.161.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="ZB5w+QQ5" Received: by mail-oo1-f52.google.com with SMTP id 006d021491bc7-5fa2685c5c0so573949eaf.3 for ; Thu, 06 Feb 2025 14:09:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1738879796; x=1739484596; darn=vger.kernel.org; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=2Pl4tUFCa3d0d2o/tbPal9aLBUD8h4VeJHXvBJClyXk=; b=ZB5w+QQ5l3p3VEqJPQUwA/DvBfFYPKVur0mD1+jMRBejYNKOzsRMhWSLqpUwbiOQsN ouApreK1T0I7n62KZkgLj9kcI+/ipRC6W9REVsve7vQkXM4mCnAebQWelxAvp94IDUi/ gDWVKNqd2gCNOLHztfxVjUn4MES0iU8qf5OH0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738879796; x=1739484596; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2Pl4tUFCa3d0d2o/tbPal9aLBUD8h4VeJHXvBJClyXk=; b=j244OxpI9rJghCT4ROaaz5YyEEhfP5+969wg3+1slitRPy9KtW79IHSV6frTfEIVrx 8S+1e+VDEX6S6s2Nu2KtntcBxEzRljxdyZnOMPkpQo3qHBCaHp3L2vX7+X+kH275PK88 2yISTjA63JGuSH6QeGOIjaL23NdU9Xc6x6gp52YmlFB7X8Cl9cJB49fmg5Hw/83+pBvD T2N/COVz4WeSCGQRIVFl1iRjcBZq0hq/If59euE4ciTz9JS9Ln/P0JlTMDeJnRuIgLso FgGXVvAtg0jL4M/2JnbAZOYEyOVJUlaTnnE+ncxIXC5qFExHrQnzufs7vEXh22EEo9SE lJtA== X-Forwarded-Encrypted: i=1; AJvYcCVNTb2jY8iPuhhnsYoq1dBQqJoJg1D+xIoKT2WYqayTaI/G2ObNQp+1mhW8X911/W+KvGpf3TJkZax5GpA=@vger.kernel.org X-Gm-Message-State: AOJu0YwOo1ycZ8MyzoiRW7lvnjMvPFJ9POHCob26oSQBWNUt43H7GNYu LQuvdlQn4E9SIKv9h1pmV7g82/LOAQFXKBIA3tL/q62LcHUhdzt/J84zQYiUFWBnwp1r+t1k0Qa yV4vM X-Gm-Gg: ASbGncu4GY07DqzKF1D67ZOQK7U3aCSyADapLW7UXrVZHMAyJBg/gBqQ59VW7p9thze jNEz+atmX+aTosXI7zdsmWZhNLra5Rqz3dMD/L7v+5/p2byx7DwXjS7TLshVBI4Tqnnmc7pMWNO z1UPeCPIP/B3v87ar6XJzty+qUz05Y3OpRjvtu+rfRyZGUekQ3g/Uj4SDpjCenI/6WsgqLa5UyS uaOUKW2URmmkXeM6+5HUBcwy9AgaOpy3n1zXb9/24n+HZpqGL5H/gMeclLzXXTwL7lKF3oeCstk XYwAdPb6oycGSNA07k2IzbGdBYsERbZHpClIbJB/ue2tYUF5jDw= X-Google-Smtp-Source: AGHT+IGlUzW1l3o5ytaJqT4i8iUSbyIPWL/1ehx8OrH22X5CWc59YzYvc6ftg2KkIleqzAjSWYmUCA== X-Received: by 2002:a05:6820:f09:b0:5fa:1ee7:1325 with SMTP id 006d021491bc7-5fc5e746384mr872671eaf.7.1738879796045; Thu, 06 Feb 2025 14:09:56 -0800 (PST) Received: from mail.broadcom.net ([192.19.144.250]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-5fc544cf88esm454109eaf.15.2025.02.06.14.09.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Feb 2025 14:09:55 -0800 (PST) From: Kamal Dasu To: ulf.hansson@linaro.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, adrian.hunter@intel.com, linux-mmc@vger.kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, wsa+renesas@sang-engineering.com Cc: f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, Kamal Dasu Subject: [PATCH RFC 1/3] mmc: add request_start() and request_done() mmc ops Date: Thu, 6 Feb 2025 17:09:38 -0500 Message-Id: <20250206220940.10553-2-kamal.dasu@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250206220940.10553-1-kamal.dasu@broadcom.com> References: <20250206220940.10553-1-kamal.dasu@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Kamal Dasu These ops enable host vendor driver to take action on request start and request done both in case of sdhci and cqe requests. Signed-off-by: Kamal Dasu --- drivers/mmc/core/core.c | 14 +++++++++++++- include/linux/mmc/host.h | 4 ++++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 5241528f8b90..a835ebc6282c 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -206,8 +206,11 @@ void mmc_request_done(struct mmc_host *host, struct mm= c_request *mrq) * Request starter must handle retries - see * mmc_wait_for_req_done(). */ - if (mrq->done) + if (mrq->done) { mrq->done(mrq); + if (host->ops->request_done) + host->ops->request_done(host, mrq); + } } =20 EXPORT_SYMBOL(mmc_request_done); @@ -340,6 +343,9 @@ int mmc_start_request(struct mmc_host *host, struct mmc= _request *mrq) =20 init_completion(&mrq->cmd_completion); =20 + if (host->ops->request_start) + host->ops->request_start(host, mrq); + mmc_retune_hold(host); =20 if (mmc_card_removed(host->card)) @@ -437,6 +443,9 @@ int mmc_cqe_start_req(struct mmc_host *host, struct mmc= _request *mrq) { int err; =20 + if (host->ops->request_start) + host->ops->request_start(host, mrq); + /* * CQE cannot process re-tuning commands. Caller must hold retuning * while CQE is in use. Re-tuning can happen here only when CQE has no @@ -512,6 +521,9 @@ void mmc_cqe_request_done(struct mmc_host *host, struct= mmc_request *mrq) } =20 mrq->done(mrq); + + if (host->ops->request_done) + host->ops->request_done(host, mrq); } EXPORT_SYMBOL(mmc_cqe_request_done); =20 diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 68f09a955a90..739b14117c26 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -171,6 +171,10 @@ struct mmc_host_ops { int err); void (*pre_req)(struct mmc_host *host, struct mmc_request *req); void (*request)(struct mmc_host *host, struct mmc_request *req); + void (*request_start)(struct mmc_host *host, + struct mmc_request *req); + void (*request_done)(struct mmc_host *host, + struct mmc_request *req); /* Submit one request to host in atomic context. */ int (*request_atomic)(struct mmc_host *host, struct mmc_request *req); --=20 2.17.1 From nobody Sat Feb 7 08:45:01 2026 Received: from mail-oo1-f54.google.com (mail-oo1-f54.google.com [209.85.161.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 481F822FF3B for ; Thu, 6 Feb 2025 22:10:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879806; cv=none; b=iKSGJddpHL0PegW0/kV9Bgkjmf5VUNvO6T/kKGqRUu+AiJrrJsYnyqKFaze0CuV0HrJYohrDSKXlRUGNAoxw9Mu0TVs0lVbn4xbUELDhV7dEp+fv9fQc0f3ME3G5B/cAvrCs1fE1ubjZhRqVERq/SD+4F0WhyWYL7bi9NPOLd0M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879806; c=relaxed/simple; bh=AL/Q38C8GaSxB2X7k5q4eSMpVP3I19XETccxZ0i5coM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=h0b6y0Z6kKD+UHrrQZmjKgojA5LBeOLZfFUGUq5d+klNWN6DxDITnta3qsuJrSmIzPz4qaVmeXu6TSRsKLHCBqLiODdMWEDIG629A3Jcsg67LZO6Fea2f1gpwOlKoXx7yz0AJsdbeo7SFq0cIkPjOXAXLMcVk34AO4S3I141aCo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=c4Qdvfg8; arc=none smtp.client-ip=209.85.161.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="c4Qdvfg8" Received: by mail-oo1-f54.google.com with SMTP id 006d021491bc7-5fa22d0b88fso834615eaf.1 for ; Thu, 06 Feb 2025 14:10:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1738879804; x=1739484604; darn=vger.kernel.org; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=O/a4xSagbqmb3UAk03PlQCeWIa4LP7rwRFx2VsXaGsc=; b=c4Qdvfg8OlT6hyAxhE0d+XDrCrKjQhneFcw+wMCTWxYPXacw52kid/Jd/SC6Sl7evx IdXx1uSIpY/Lr27wJa3GcPSYn0SzMe+EG4QFt1CApbBqizkLIZErceIuTUkpqgX6VCVe DFHRdCvC5rDiUXNr8bwVYvglhWF8xfip6GBxQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738879804; x=1739484604; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=O/a4xSagbqmb3UAk03PlQCeWIa4LP7rwRFx2VsXaGsc=; b=URmPTeMYGTub+qYvmhHUM3Mhw3WEEtxK1lDokQ6KYkOJsQ3QMVigp/CcpoOcburmlD W0KyW2g1BDjJpileVSd0nEAa9q5yfksDS4Cp2wl38SzXSs7761v2My0JBW5o2hbAr3/p qM8WhXCTgaeVA31KchYJLIgFaXeame0ezQg9HXtRtD/mmNsRcgZxdspyzpAHVBBM7ZjK pPEGZzVgMTKkxW9Dy507ssR+OJ6oVmOXQLsCr+6z5NRgsZqCdk4d/MvHPmATRXCFTfGc VvwrmRrpQJyQ6Ym2Pq/iajk/PKMvGyEegaN9pOn98tVAzBU90ebS3UEVAV3bENSJrBG8 8FGQ== X-Forwarded-Encrypted: i=1; AJvYcCUsIP4/6pqiskarUFIgFuQ3FnCHa9nqBj1iS5xNCVhPsJLU2BasbML18Kqr857zpDcQS7ZAphz5LeD9XvE=@vger.kernel.org X-Gm-Message-State: AOJu0YzivmiyvQ/kQ7chSnS1ISH34MiCXyjqOe/djf5DgbaOxL/ybK92 fYDhlw7KdfLUxNWM8nmZ5tlcVinWkd1YVIz0UMqr1RKQwry02hH10oVWyhlY3w== X-Gm-Gg: ASbGncttio3NxNOW92Mru6YVNvVB7kmjnoHEWdX+OL9KnMsYWjJpq3/ADBBpRNMBL5D gx7F3vcHTo1WASTntL0//XAsdm//YadoRU1xN2Dw1DDtaVa9OWPrbztwCJo6p7QyXBaIkI1iyhB ukllFB093oBHh8OGAKV1vCDRCATbAFw8uicpP0G4lY0hEU7O8cPPvCvG/MR5S0SXAnBjKDRgAB8 d4XW+H1meEOzIm4cnY9d+uz7GJctBlXr40vhft+VVy/skPzgFp4viWSx/Grk/6READWdCIycw1b SXG8pL4dC5Gxebeat6W2wc8fXyJx1jSlyBTFX+H/vSj3qCn53Hk= X-Google-Smtp-Source: AGHT+IFUhC9g3GBMlrCIsfgANO5KdvzDEnLHzgT9bVl7MomkcLWvLwEBIiP+tF9jny8ui4xtcfFe6w== X-Received: by 2002:a05:6820:1689:b0:5f8:b916:2516 with SMTP id 006d021491bc7-5fc5e45b47fmr729717eaf.0.1738879804274; Thu, 06 Feb 2025 14:10:04 -0800 (PST) Received: from mail.broadcom.net ([192.19.144.250]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-5fc544cf88esm454109eaf.15.2025.02.06.14.10.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Feb 2025 14:10:03 -0800 (PST) From: Kamal Dasu To: ulf.hansson@linaro.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, adrian.hunter@intel.com, linux-mmc@vger.kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, wsa+renesas@sang-engineering.com Cc: f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, Kamal Dasu Subject: [PATCH RFC 2/3] dt-bindings: mmc: brcm,sdhci-brcmstb: Add sdio sharing support Date: Thu, 6 Feb 2025 17:09:39 -0500 Message-Id: <20250206220940.10553-3-kamal.dasu@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250206220940.10553-1-kamal.dasu@broadcom.com> References: <20250206220940.10553-1-kamal.dasu@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Kamal Dasu Introduce emmc flash sharing support using hardware semaphore and SDIO share register to synchronize between TZOS and linux. Signed-off-by: Kamal Dasu --- .../bindings/mmc/brcm,sdhci-brcmstb.yaml | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml = b/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml index eee6be7a7867..b0ee39aeccb1 100644 --- a/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml +++ b/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml @@ -27,15 +27,23 @@ properties: - const: brcm,sdhci-brcmstb =20 reg: - maxItems: 2 + minItems: 2 =20 reg-names: items: - const: host - const: cfg + - const: share # Optional reg=20 + - const: mmc_sem # Optional reg + - const: flshr_ipis0 # Optional reg =20 interrupts: - maxItems: 1 + minItems: 1 + + interrupt-names: + items: + - const: SDIO1_0 + - const: recv_ipi0 # Optional interrupt =20 clocks: minItems: 1 @@ -76,6 +84,7 @@ required: - compatible - reg - interrupts + - interrupt-names - clocks - clock-names =20 @@ -111,7 +120,8 @@ examples: supports-cqe; non-removable; bus-width =3D <0x8>; - interrupts =3D <0x0 0x27 0x4>; + interrupts-extended =3D <0x1 0x0 0x1f 0x4 0x18 0x11>; + interrupt-names =3D "SDIO1_0", "recv_ipi0"; clocks =3D <&scmi_clk 245>; clock-names =3D "sw_sdio"; }; --=20 2.17.1 From nobody Sat Feb 7 08:45:01 2026 Received: from mail-ot1-f51.google.com (mail-ot1-f51.google.com [209.85.210.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DFC3E239090 for ; Thu, 6 Feb 2025 22:10:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879811; cv=none; b=EiYj5ty4omlnFr0e6NIYon/bZyKenCHPs2/nIX3t1qcHd1irWTDElSLBpfhWMTsOsy/bUfMi/BqkslgGHJ1S8buWSiz7dV0S9HWmb4FOPWy6zHjtABf5qyU8Wkhr+FfMN8syMiby7MHwcwtUbDLDm6Ftrb/q2tnLnXY9n3i8cJg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879811; c=relaxed/simple; bh=2ltdpSYNJ4qp7eXJZyWR/TpXJn8oKt1mLyYkedoWIV8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=g8u3R2SrBF9LkTfFwxv1s0f0najEMVyHUtoNKt8jKnb2wyA3r+BVnS/scG/DXkfAjpJwVVU/PmUDGQV1i5AuGz+MXBUqEu9sFEpNdtdrEbhO9yWBKPDVPAjmEpeSJVD0OOfShbmjzk10qGnKYG6gI9b3Y81pHIRGvT6ZXTNMpdo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=AuRaHETx; arc=none smtp.client-ip=209.85.210.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="AuRaHETx" Received: by mail-ot1-f51.google.com with SMTP id 46e09a7af769-71ded02b779so862001a34.2 for ; Thu, 06 Feb 2025 14:10:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1738879809; x=1739484609; darn=vger.kernel.org; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=Lkz5Ief6/yedXCa2E82v4RvcWGp3Dzv7ilZTZRS1+D0=; b=AuRaHETxL11y3S7exSjvwLVj4VYvHkWf4r7mjhENAtlltELCClEOEJR8TLz2s7XXWa bdKwy5gFBqUMilUJxzKIemTJFBNUodxzGXUpNQRarB7VUKRR3DGcOn73P1eRFBZE2dwm /IBaDvBWP3L8Fn7eM4rJIxv4yTELH+XuJYA0M= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738879809; x=1739484609; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Lkz5Ief6/yedXCa2E82v4RvcWGp3Dzv7ilZTZRS1+D0=; b=i1lwYIPL8QoWS3UkXbYl6F6BgI/FwZ3Ee+kF8JIvHlvnyzUpFcD1qoHo86NWxulS05 oN3gO4LyGKiXzDIxM6l+MqMg53Kgp5yd9X/NwYO0YLQv6Is/WAsBDoG1KlPu0mC5aYgK T3RGRh8+sQ9HbuBbvkH/Repf/83jSdUz6gcAilm3vLnCPCvjK0dalvFvQkHIzfw2PhTd lnhkXUiRq72CorGutAqpUwMPN/bbYKZXOc/UwCsmbr25m+4NHmrVlmDlJRRKsvB8RURE 8tghakBSBn9MDhbTBCBfIdhZj8+RQoHx6i70lE3pwK8y3pvaegNzyhr1bwSMQBsObhfa 5MHw== X-Forwarded-Encrypted: i=1; AJvYcCWZkVmR7Cgsd7Q6ewNHJgCALUBy6Gc3z0BC+DMz56A1AG0nIIQJD5wOUu6je7Xc4icJIwkU+6VqCbt6MWo=@vger.kernel.org X-Gm-Message-State: AOJu0YywPdo2ABxlGrMxLvEe60Ydqww1+WowJx71UuMTUSJ0d3NLfTTg NxXFqiCfWSLXWENkfT5gioDYdeSBDGM+IvH3wOzjxWvpnp2Uf8w5/p5MbZiq5w== X-Gm-Gg: ASbGncuBNWug1+JpV0WuDy/UIwIV28pay/AtQ/fQgqeOey524Bl5ry5Ns8LKO86yy3G Pw8FAhxvuZn7CSCrxQSRJ3cNHzQ5Asbn5WpDcgOban540fLOWHZxZnQawqhDPXC5kEy0kSLT0gx MPVVRGOyEAcv6gQYjgrvPVArJoc+1g5mr5FNrqoc6LqtEO58F6tqek7v5y84cYgxz9XicZzqirP o/ltTa6jcgTdppEHWq4XrT2sDm71vbJ6H9V3g2Kb6XWcDGIJ7hZNrUxoWY7wXMZd2gbzBj4gzyF w518IkQPmxe20pndVifJFooCoLyjMsfmf9Z9nrGKbvaVtiMmquM= X-Google-Smtp-Source: AGHT+IFe5+HDp6jW4POK05lh6FZmTZaClwC8C9AdZB4KwfkTEdj/0zyU6GxhcMlShT6jCqkuU2sdmg== X-Received: by 2002:a05:6830:378c:b0:71e:946:80c4 with SMTP id 46e09a7af769-726b87f8463mr750227a34.12.1738879808913; Thu, 06 Feb 2025 14:10:08 -0800 (PST) Received: from mail.broadcom.net ([192.19.144.250]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-5fc544cf88esm454109eaf.15.2025.02.06.14.10.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Feb 2025 14:10:08 -0800 (PST) From: Kamal Dasu To: ulf.hansson@linaro.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, adrian.hunter@intel.com, linux-mmc@vger.kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, wsa+renesas@sang-engineering.com Cc: f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, Kamal Dasu Subject: [PATCH RFC 3/3] mmc: sdhci-brcmstb: Add rpmb sharing support in host driver Date: Thu, 6 Feb 2025 17:09:40 -0500 Message-Id: <20250206220940.10553-4-kamal.dasu@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250206220940.10553-1-kamal.dasu@broadcom.com> References: <20250206220940.10553-1-kamal.dasu@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Kamal Dasu Adding sdio rpmb parition sharing support to brcmstb host driver. The sdhci-brcmstb controller driver uses SDIO_SHARE registers and HW semaphore register to synchronize access between linux and the trusted zone firmware. Signed-off-by: Kamal Dasu --- drivers/mmc/host/sdhci-brcmstb.c | 275 ++++++++++++++++++++++++++++++- 1 file changed, 273 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcm= stb.c index 0ef4d578ade8..6ba90108cd5c 100644 --- a/drivers/mmc/host/sdhci-brcmstb.c +++ b/drivers/mmc/host/sdhci-brcmstb.c @@ -46,9 +46,32 @@ /* Select all SD UHS type I SDR speed above 50MB/s */ #define MMC_CAP_UHS_I_SDR_MASK (MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104) =20 +#define SDHCI_BRCMSTB_AGENT_LINUX 'L' +#define SDHCI_BRCMSTB_AGENT_TZOS 'A' +#define FLSHARE_IPIS0_INT_SEND_MASK BIT(17) +#define HWSEM_AQUIRE 1 +#define HWSEM_RELEASE 0 + +enum brcmstb_sdhci_share_reg { + BRCMSTB_SD_SHARE_REG_NEXT =3D 0x0, /* Next Agent Register */ + BRCMSTB_SD_SHARE_REG_PMC =3D 0x4, /* Work Agent1 Register */ + BRCMSTB_SD_SHARE_REG_TZOS =3D 0x8, /* Work Agent2 Register */ + BRCMSTB_SD_SHARE_REG_LINUX =3D 0xc, /* Work Agent3 Register */ +}; + +struct brcmstb_sdio_share_info { + void __iomem *share_reg; + void __iomem *sem_reg; + void __iomem *ipis0_reg; + int irq_recv; + wait_queue_head_t wq; +}; + + struct sdhci_brcmstb_priv { void __iomem *cfg_regs; unsigned int flags; + struct brcmstb_sdio_share_info *si; struct clk *base_clk; u32 base_freq_hz; }; @@ -288,7 +311,7 @@ static const struct brcmstb_match_priv match_priv_7216 = =3D { .ops =3D &sdhci_brcmstb_ops_7216, }; =20 -static struct brcmstb_match_priv match_priv_74165b0 =3D { +static const struct brcmstb_match_priv match_priv_74165b0 =3D { .flags =3D BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE, .hs400es =3D sdhci_brcmstb_hs400es, .ops =3D &sdhci_brcmstb_ops_74165b0, @@ -303,6 +326,176 @@ static const struct of_device_id __maybe_unused sdhci= _brcm_of_match[] =3D { {}, }; =20 +static void sdhci_brcmstb_dbg_dump_sdio_share_regs(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si =3D priv->si; + + dev_dbg(mmc_dev(host->mmc), + "sem:0x%x wn:0x%x wa:0x%x wl:0x%x\n", + readl(si->sem_reg), + readl(si->share_reg + BRCMSTB_SD_SHARE_REG_NEXT), + readl(si->share_reg + BRCMSTB_SD_SHARE_REG_TZOS), + readl(si->share_reg + BRCMSTB_SD_SHARE_REG_LINUX)); +} + +static bool sdhci_brcmstb_host_is_next(struct brcmstb_sdio_share_info *si) +{ + u32 wn; + + /* if work queue is empty or we are next */ + wn =3D readl(si->share_reg + BRCMSTB_SD_SHARE_REG_NEXT); + return (wn =3D=3D 0 ? true : (wn =3D=3D SDHCI_BRCMSTB_AGENT_LINUX)); +} + +#define SDHCI_BRCMSTB_HOST_TIMEOUT_MS 5 + +static int sdhci_brcmstb_wait_for_host(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si =3D priv->si; + int ret =3D 0; + + /* put self in wait queue if host not avialable */ + ret =3D wait_event_timeout(si->wq, sdhci_brcmstb_host_is_next(si), + msecs_to_jiffies(SDHCI_BRCMSTB_HOST_TIMEOUT_MS) + 1); + + return ret; +} + +static u32 semreg_wrrdl(struct sdhci_host *host, u32 value, void __iomem *= addr) +{ + writel(value, addr); + return readl(addr); +} + +static void sdhci_brcmstb_hwsem(struct sdhci_host *host, int sem_op) +{ + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si =3D priv->si; + u32 wr_val; + u32 wa, sem_val; + bool is_next; + int ret =3D 0; + + while (1) { + if (sem_op =3D=3D HWSEM_AQUIRE) { + /* + * get hw sem : + * + * 1. write linux agent id to work register WL + * 2. check if we are next in line or workqueue empty + * 3. if linux is not next in queue go into waitq + * + * handle case where the next work agent was not set + * but TZOS grabbed the semaphore before we could + * in that case too we put ourselves in wait queue, + * tzos shall remove linux from wait queue using IPI + */ + wr_val =3D SDHCI_BRCMSTB_AGENT_LINUX; + writel(wr_val, si->share_reg + BRCMSTB_SD_SHARE_REG_LINUX); + is_next =3D sdhci_brcmstb_host_is_next(si); + if (!is_next) + ret =3D sdhci_brcmstb_wait_for_host(host); + } else { + /* + * release hw semphore + * 1. set the next agent before releasing hw sem + * 2. clear work agent + * 3. Release hw semaphore + */ + wa =3D readl(si->share_reg + BRCMSTB_SD_SHARE_REG_TZOS); + writel(wa, si->share_reg + BRCMSTB_SD_SHARE_REG_NEXT); + writel(0, si->share_reg + BRCMSTB_SD_SHARE_REG_LINUX); + wr_val =3D 0; + sem_val =3D readl(si->sem_reg); + if (!sem_val || sem_val !=3D SDHCI_BRCMSTB_AGENT_LINUX) + goto out; + + } + + /* try to grab/release hw semaphore */ + sem_val =3D semreg_wrrdl(host, wr_val, si->sem_reg); + + if (!wr_val || (sem_val =3D=3D wr_val)) + break; + } + + return; +out: + sdhci_brcmstb_dbg_dump_sdio_share_regs(host); + dev_dbg(mmc_dev(host->mmc), "%s ret:%d\n", + (sem_op =3D=3D HWSEM_AQUIRE) ? "get" : "release", ret); +} + +static bool sdhci_brcmstb_cqe_is_idle(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct mmc_host *mmc =3D host->mmc; + struct cqhci_host *cq_host; + + if (!(priv->flags & BRCMSTB_PRIV_FLAGS_HAS_CQE)) + return true; + + cq_host =3D mmc->cqe_private; + /* still processing mrqs in cqe mode */ + return (cq_host->qcnt =3D=3D 0 && !cq_host->recovery_halt) ? true : false; +} + +static void sdhci_brcmstb_aquire_hwsem(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si =3D priv->si; + u32 wn =3D SDHCI_BRCMSTB_AGENT_LINUX; + + sdhci_brcmstb_hwsem(host, HWSEM_AQUIRE); + /* indicate linux as next agent since it got the hw semaphore */ + writel(wn, si->share_reg + BRCMSTB_SD_SHARE_REG_NEXT); + dev_dbg(mmc_dev(host->mmc), "hwsem get\n"); + sdhci_brcmstb_dbg_dump_sdio_share_regs(host); +} + +static void sdhci_brcmstb_release_hwsem(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si =3D priv->si; + u32 wn; + + if (!sdhci_brcmstb_cqe_is_idle(host)) + return; + + wn =3D readl(si->share_reg + BRCMSTB_SD_SHARE_REG_NEXT); + /* release hw semaphore send IPI when done */ + sdhci_brcmstb_hwsem(host, HWSEM_RELEASE); + + if (wn =3D=3D SDHCI_BRCMSTB_AGENT_TZOS) + writel(FLSHARE_IPIS0_INT_SEND_MASK, si->ipis0_reg); + + dev_dbg(mmc_dev(host->mmc), "hwsem release\n"); + sdhci_brcmstb_dbg_dump_sdio_share_regs(host); +} + +static void sdhci_brcmstb_request_start(struct mmc_host *mmchost, + struct mmc_request *mrq) +{ + sdhci_brcmstb_aquire_hwsem(mmc_priv(mmchost)); +} + +static void sdhci_brcmstb_request_done(struct mmc_host *mmchost, + struct mmc_request *mrq) +{ + struct sdhci_host *host =3D mmc_priv(mmchost); + + if (!mmchost->ongoing_mrq) + sdhci_brcmstb_release_hwsem(host); +} + static u32 sdhci_brcmstb_cqhci_irq(struct sdhci_host *host, u32 intmask) { int cmd_error =3D 0; @@ -316,6 +509,81 @@ static u32 sdhci_brcmstb_cqhci_irq(struct sdhci_host *= host, u32 intmask) return 0; } =20 +static irqreturn_t sdhci_brcmstb_recv_ipi0_irq(int irq, void *dev_id) +{ + struct sdhci_host *host =3D dev_id; + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si =3D priv->si; + u32 wn; + + wn =3D readl(si->share_reg + BRCMSTB_SD_SHARE_REG_NEXT); + dev_dbg(mmc_dev(host->mmc), "ipi irq %d wn 0x%x\n", irq, wn); + + if (wn =3D=3D SDHCI_BRCMSTB_AGENT_LINUX) + wake_up(&si->wq); + + return IRQ_HANDLED; +} + +static int sdhci_brcmstb_sdio_share_init(struct platform_device *pdev) +{ + struct sdhci_host *host =3D dev_get_drvdata(&pdev->dev); + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_brcmstb_priv *priv =3D sdhci_pltfm_priv(pltfm_host); + struct brcmstb_sdio_share_info *si; + void __iomem *sdio_sh_regs; + int ret; + + /* sdio_share block */ + sdio_sh_regs =3D devm_platform_ioremap_resource_byname(pdev, "share"); + if (IS_ERR(sdio_sh_regs)) + return 0; + + si =3D kcalloc(1, sizeof(struct brcmstb_sdio_share_info), + GFP_KERNEL); + if (!si) + return -ENOMEM; + + si->share_reg =3D sdio_sh_regs; + si->sem_reg =3D devm_platform_ioremap_resource_byname(pdev, + "mmc_sem"); + if (IS_ERR(si->sem_reg)) { + ret =3D PTR_ERR(si->sem_reg); + dev_err(&pdev->dev, "mmc_sem register\n"); + goto err; + } + + si->irq_recv =3D platform_get_irq_byname_optional(pdev, "recv_ipi0"); + if (si->irq_recv < 0) { + ret =3D si->irq_recv; + dev_err(&pdev->dev, "recv_ipi0 IRQ not found\n"); + goto err; + } + + ret =3D devm_request_irq(&pdev->dev, si->irq_recv, + sdhci_brcmstb_recv_ipi0_irq, + 0, "mmc_recv_ipi0", host); + if (ret < 0) { + dev_err(&pdev->dev, "mmc_recv_ipi0 IRQ request_irq failed\n"); + goto err; + } + + si->ipis0_reg =3D devm_platform_ioremap_resource_byname(pdev, "flshr_ipis= 0"); + if (IS_ERR(si->ipis0_reg)) + goto err; + + priv->si =3D si; + init_waitqueue_head(&si->wq); + host->mmc_host_ops.request_start =3D sdhci_brcmstb_request_start; + host->mmc_host_ops.request_done =3D sdhci_brcmstb_request_done; + + return 0; +err: + kfree(si); + return ret; +} + static int sdhci_brcmstb_add_host(struct sdhci_host *host, struct sdhci_brcmstb_priv *priv) { @@ -482,8 +750,11 @@ static int sdhci_brcmstb_probe(struct platform_device = *pdev) goto err; =20 pltfm_host->clk =3D clk; - return res; + res =3D sdhci_brcmstb_sdio_share_init(pdev); + if (res) + goto err; =20 + return res; err: sdhci_pltfm_free(pdev); clk_disable_unprepare(base_clk); --=20 2.17.1