From nobody Mon Nov 25 07:38:22 2024 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 19036209F41; Tue, 29 Oct 2024 20:35:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730234132; cv=none; b=RyclpzjC4/BPNfcJTS1ykXfjO4v9UgbCSqojN50El3K1ETu+JUdD8lz1FcBNTZWkHLqGEm1VRCvetmc7bfVAleWXQYlm3uAoUBUQfSTPXuo224GNGGGVGwWMpszxIdGkhw1JZSYsVkp5h+rOXSdY4ZUVgWId0h621jRD33nl/ww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730234132; c=relaxed/simple; bh=kiJbbCbEMS52SgzXdot0QZ4pCqHnds8/0jTAjptXFJo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UH03uy9i2gWwjwyXiXukTBIdOczYepIcyzzaZ3JXTw4X/b55RvkVylL19P4TDw2V+Rk9nQT5WlbZOpsNOBuciUJasd5HXDyS0hu5kyRFMJ+BoHTnANMRlZ4hyTranWpsJl9ygdWadGpWD7NLfVdIXz7Cy7v8/g+AloR9qZNCRJE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=kWunKKb4; arc=none smtp.client-ip=192.198.163.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="kWunKKb4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730234130; x=1761770130; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=kiJbbCbEMS52SgzXdot0QZ4pCqHnds8/0jTAjptXFJo=; b=kWunKKb4Xk/diizc3ePBFs6Tm8Lc2ZXlmezNzeC4Ru/UlIQz6rCEIHY1 lg6RSlJT/mEtxX+gUgeKVcXHldNT6BtiyxCOc5i5oFgPRkb24JtfVGFuy uGwEeTDXdpGvFQtptEE9TNyRbdhH4uwgmYjsMv66L1tS/UMdQ7qkXa2Jt xigPYbKrFx1KB2/0XJWWK+Jlt50jNvk/2p8OkIw/aIP9a/R8YTPvrHGLC D4kQv0E42q92KU74yk6jWX4n9zGAVlV5T5gHRg+L3J8nF+/VONLL0gPE5 BHHBjRM9G5t9Hpl/cLKYI5flclmJO/sxrM21Eh0emxV/Zz1rW00R0x6QJ w==; X-CSE-ConnectionGUID: qDpuIANDSEG0b+EP/BA7dg== X-CSE-MsgGUID: yuU9LeekSCm2dtdwwewnEg== X-IronPort-AV: E=McAfee;i="6700,10204,11240"; a="40485392" X-IronPort-AV: E=Sophos;i="6.11,243,1725346800"; d="scan'208";a="40485392" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2024 13:35:29 -0700 X-CSE-ConnectionGUID: X/Xs2EFpRFaNiruTeKBc+w== X-CSE-MsgGUID: GT7Yvy6dTGScxsX+yDWNOg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,243,1725346800"; d="scan'208";a="82185243" Received: from ldmartin-desk2.corp.intel.com (HELO localhost) ([10.125.108.77]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2024 13:35:27 -0700 From: ira.weiny@intel.com Date: Tue, 29 Oct 2024 15:34:42 -0500 Subject: [PATCH v5 07/27] cxl/mbox: Flag support for Dynamic Capacity Devices (DCD) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241029-dcd-type2-upstream-v5-7-8739cb67c374@intel.com> References: <20241029-dcd-type2-upstream-v5-0-8739cb67c374@intel.com> In-Reply-To: <20241029-dcd-type2-upstream-v5-0-8739cb67c374@intel.com> To: Dave Jiang , Fan Ni , Jonathan Cameron , Navneet Singh , Jonathan Corbet , Andrew Morton Cc: Dan Williams , Davidlohr Bueso , Alison Schofield , Vishal Verma , Ira Weiny , linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, Li Ming X-Mailer: b4 0.15-dev-2a633 X-Developer-Signature: v=1; a=ed25519-sha256; t=1730234086; l=4238; i=ira.weiny@intel.com; s=20221211; h=from:subject:message-id; bh=n7huD8dmldYLwtHw2X3FtsDxzvRn0qKVDsVYqvl4Z60=; b=AsmslJUdmaOcFc3Mi0PQqQ8mKvyn0VOe//GgmhA4rOiXSiM225/8s+kkcdyuTicaFfatnLwBW dwRWudTfOfmCALoM0+DotgyBfZGWww6AGzVVc4dMtVwM+Swsy89Pm0u X-Developer-Key: i=ira.weiny@intel.com; a=ed25519; pk=noldbkG+Wp1qXRrrkfY1QJpDf7QsOEthbOT7vm0PqsE= From: Navneet Singh Per the CXL 3.1 specification software must check the Command Effects Log (CEL) for dynamic capacity command support. Detect support for the DCD commands while reading the CEL, including: Get DC Config Get DC Extent List Add DC Response Release DC Signed-off-by: Navneet Singh Reviewed-by: Jonathan Cameron Reviewed-by: Fan Ni Reviewed-by: Dave Jiang Reviewed-by: Davidlohr Bueso Reviewed-by: Li Ming Co-developed-by: Ira Weiny Signed-off-by: Ira Weiny --- Changes: [iweiny: Keep tags for this early simple patch] [Davidlohr: update commit message] [djiang: Fix misalignment] --- drivers/cxl/core/mbox.c | 33 +++++++++++++++++++++++++++++++++ drivers/cxl/cxlmem.h | 15 +++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 5175138c4fb7382426145640d7d04967b02b22dc..aac3bfc0d2c3f916dd870b9f828= 8b24d90fc9974 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -164,6 +164,34 @@ static void cxl_set_security_cmd_enabled(struct cxl_se= curity_state *security, } } =20 +static bool cxl_is_dcd_command(u16 opcode) +{ +#define CXL_MBOX_OP_DCD_CMDS 0x48 + + return (opcode >> 8) =3D=3D CXL_MBOX_OP_DCD_CMDS; +} + +static void cxl_set_dcd_cmd_enabled(struct cxl_memdev_state *mds, + u16 opcode) +{ + switch (opcode) { + case CXL_MBOX_OP_GET_DC_CONFIG: + set_bit(CXL_DCD_ENABLED_GET_CONFIG, mds->dcd_cmds); + break; + case CXL_MBOX_OP_GET_DC_EXTENT_LIST: + set_bit(CXL_DCD_ENABLED_GET_EXTENT_LIST, mds->dcd_cmds); + break; + case CXL_MBOX_OP_ADD_DC_RESPONSE: + set_bit(CXL_DCD_ENABLED_ADD_RESPONSE, mds->dcd_cmds); + break; + case CXL_MBOX_OP_RELEASE_DC: + set_bit(CXL_DCD_ENABLED_RELEASE, mds->dcd_cmds); + break; + default: + break; + } +} + static bool cxl_is_poison_command(u16 opcode) { #define CXL_MBOX_OP_POISON_CMDS 0x43 @@ -751,6 +779,11 @@ static void cxl_walk_cel(struct cxl_memdev_state *mds,= size_t size, u8 *cel) enabled++; } =20 + if (cxl_is_dcd_command(opcode)) { + cxl_set_dcd_cmd_enabled(mds, opcode); + enabled++; + } + dev_dbg(dev, "Opcode 0x%04x %s\n", opcode, enabled ? "enabled" : "unsupported by driver"); } diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 2a25d1957ddb9772b8d4dca92534ba76a909f8b3..e8907c403edbd83c8a36b8d013c= 6bc3391207ee6 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -239,6 +239,15 @@ struct cxl_event_state { struct mutex log_lock; }; =20 +/* Device enabled DCD commands */ +enum dcd_cmd_enabled_bits { + CXL_DCD_ENABLED_GET_CONFIG, + CXL_DCD_ENABLED_GET_EXTENT_LIST, + CXL_DCD_ENABLED_ADD_RESPONSE, + CXL_DCD_ENABLED_RELEASE, + CXL_DCD_ENABLED_MAX +}; + /* Device enabled poison commands */ enum poison_cmd_enabled_bits { CXL_POISON_ENABLED_LIST, @@ -461,6 +470,7 @@ static inline struct cxl_dev_state *mbox_to_cxlds(struc= t cxl_mailbox *cxl_mbox) * @lsa_size: Size of Label Storage Area * (CXL 2.0 8.2.9.5.1.1 Identify Memory Device) * @firmware_version: Firmware version for the memory device. + * @dcd_cmds: List of DCD commands implemented by memory device * @enabled_cmds: Hardware commands found enabled in CEL. * @exclusive_cmds: Commands that are kernel-internal only * @total_bytes: sum of all possible capacities @@ -485,6 +495,7 @@ struct cxl_memdev_state { struct cxl_dev_state cxlds; size_t lsa_size; char firmware_version[0x10]; + DECLARE_BITMAP(dcd_cmds, CXL_DCD_ENABLED_MAX); DECLARE_BITMAP(enabled_cmds, CXL_MEM_COMMAND_ID_MAX); DECLARE_BITMAP(exclusive_cmds, CXL_MEM_COMMAND_ID_MAX); u64 total_bytes; @@ -554,6 +565,10 @@ enum cxl_opcode { CXL_MBOX_OP_UNLOCK =3D 0x4503, CXL_MBOX_OP_FREEZE_SECURITY =3D 0x4504, CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE =3D 0x4505, + CXL_MBOX_OP_GET_DC_CONFIG =3D 0x4800, + CXL_MBOX_OP_GET_DC_EXTENT_LIST =3D 0x4801, + CXL_MBOX_OP_ADD_DC_RESPONSE =3D 0x4802, + CXL_MBOX_OP_RELEASE_DC =3D 0x4803, CXL_MBOX_OP_MAX =3D 0x10000 }; =20 --=20 2.47.0