From nobody Wed Nov 27 23:50:40 2024 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 67F991D0BBB; Mon, 7 Oct 2024 23:16:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728342997; cv=none; b=rrN7yXIBIFYIrSsMN/bFoPjt1hFqh+CXTQ5J1osXny/sZ2BbJL5s8Xd8eT5i3Ved8a/1X/XD+k30sfVVNKI3D7iv560P6JISXhBvbFkfKfxKBC6cgazdvjncNbFghtE0F5trk2+tIslvJPRlaY9pWx/j0DppmTt1P+8xftOBxYE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728342997; c=relaxed/simple; bh=6OKBBIVlhFC+VlGy08SpL/Q1W/zTSrFgZ3BHofwRgrw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ODx1BgI6xteiDjVt8+LSjWan3UhItKmueZkgN+DTByKoHTIfIDUT9PUuXZZ1TSOigCvtwSTqoeOiMu7cdPAqxwGBpfUouSUAP2EjujvMxcw5QXH6jVQ+gHMyeoSc2OVZGhVOJHZe+hb2iHIOwAfqktcOgBBELW3A1yWbPYW665w= 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=AE38x1bL; arc=none smtp.client-ip=198.175.65.11 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="AE38x1bL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728342996; x=1759878996; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=6OKBBIVlhFC+VlGy08SpL/Q1W/zTSrFgZ3BHofwRgrw=; b=AE38x1bLJ1PyGSo/4rkwj9TeS/0bAoF10fn84Nl/A88UwP7JuUnwOeC1 F1fEerzUMZaaX9jrdKHO0Du2Tp6xbEtyAvmunN/GzhHuUMcS4SpJT67xE prFq88nWmFwPtkUCX0KvUmSwDabohoxInkG/lH9m0bsPuKsmkDywau2fP w0jzkHmhkZ6tomoAtsTa4mxjnHK5NKLDjIaHFyWAA+JraAwTb53J/xr94 DSZzuWES7j6ioG6dmIiZnSPCvEbVit45V8LOIVch2g7giuliv/6iNDvrk iAnEGQlVe03LOu7sRkDP0ioWNKGGtny81DITDqMy5PS0Ce7nH1OvpcDxa w==; X-CSE-ConnectionGUID: oCA0+sRqTmukDRRO5mroYQ== X-CSE-MsgGUID: uQD9vz4pTwuCR3OvjLs/0A== X-IronPort-AV: E=McAfee;i="6700,10204,11218"; a="38078923" X-IronPort-AV: E=Sophos;i="6.11,185,1725346800"; d="scan'208";a="38078923" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2024 16:16:35 -0700 X-CSE-ConnectionGUID: I/nwYDB2Q1W+wXgf/3IqWg== X-CSE-MsgGUID: UO2XJyYQT9ivGv1NXhZ8ug== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,185,1725346800"; d="scan'208";a="75634588" Received: from ldmartin-desk2.corp.intel.com (HELO localhost) ([10.125.110.112]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2024 16:16:32 -0700 From: ira.weiny@intel.com Date: Mon, 07 Oct 2024 18:16:13 -0500 Subject: [PATCH v4 07/28] 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: <20241007-dcd-type2-upstream-v4-7-c261ee6eeded@intel.com> References: <20241007-dcd-type2-upstream-v4-0-c261ee6eeded@intel.com> In-Reply-To: <20241007-dcd-type2-upstream-v4-0-c261ee6eeded@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-btrfs@vger.kernel.org, linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org X-Mailer: b4 0.15-dev-37811 X-Developer-Signature: v=1; a=ed25519-sha256; t=1728342968; l=4085; i=ira.weiny@intel.com; s=20221211; h=from:subject:message-id; bh=vSWc9EamGd3FpMqialOthne1jsgvSOwpY4lexBoHJkc=; b=TaPxE4dbNm2WIyg6alzOvzFo+eaB+uv3tzZJsM7VUSYSfkHJdGYKJ5X/+DFFFRQQhLVaeHTVA F8VESETEqsEC74n+fPSktuARnVExkzqhs3SOtGFnitmwNoLuy6tpG+8 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 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 946f8e44455f..8bd5bf1a746d 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 2a25d1957ddb..e8907c403edb 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 2.46.0