From nobody Wed Nov 27 23:29:14 2024 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (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 C728B1C242D; Mon, 7 Oct 2024 23:17:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728343069; cv=none; b=QBhm52diAVdVA6muRDMGldDDjf8h8Y6WpWXvFEN7t1RXE6uAGc89xRT5S4OtoK0vfc+XPg81nMr7dVomxYoHLu0af+ruzWLL0Jj+uzKNJX0ZQt5bwFREZkJ3Yuh4RL2gp3y6O0qiJ1440RwHvqQOxVyrrT+/SBUWFEDoOBsZvik= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728343069; c=relaxed/simple; bh=nbmlR3m/1dxZRKIaG1X2yqXOWQA7D/Qm2/wWl8k/BY8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=EyPYQW5sWy+YPD++3Gfr8yGm3KKgz2jKzQJhiMI8/mN8ucVa/2ZBScvJTIjkOQgkUUhSJs4/7gy1YoDjwhSiSzfBXwi8cFwbynmj0A2ITosE2dy9CnHdxJO0qPgandiGSzV+WK4zd3C8hiG1sfr9OeN7fqcVee5J6788SHSR4IU= 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=RGalx/UK; arc=none smtp.client-ip=192.198.163.8 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="RGalx/UK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728343068; x=1759879068; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=nbmlR3m/1dxZRKIaG1X2yqXOWQA7D/Qm2/wWl8k/BY8=; b=RGalx/UKVq00fJPC6o/l8mt+Y009zk3tlE6735Ynyk+j8AMFaOB/tqOi XJMHjQAYw+h4QV+8Td01J38E92yvBmFae+7B6Gn7smuDp5YNm55+s2qpS L4ebCNYMGDeRNkuClWJ3MwMwgyjh3okr+W3BfeVhvtWifDvUWJdrWKcf9 RVkWvyJ8aRJzjDstqWvnjOLn1YYP8TOja+KRHZx8VIeBg2VcWtRbnyzJ3 rsSKt9njWaF7U55/DmRJj4/BS0iIQa6H1sH0tN+51iINYQGoAu2+tUG17 T8NHgAjnrK7gnEwfsv+M3O3VjIJuCpWRG8UZgrNqdbM3UE/s9SMd8kkzg w==; X-CSE-ConnectionGUID: IqnrcXoATRmj44EiLjpsgw== X-CSE-MsgGUID: mHSwx3H2TZar1Cs8IGWGhg== X-IronPort-AV: E=McAfee;i="6700,10204,11218"; a="45036990" X-IronPort-AV: E=Sophos;i="6.11,185,1725346800"; d="scan'208";a="45036990" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2024 16:17:10 -0700 X-CSE-ConnectionGUID: sHXGOXjFQVa+uDfTF3vkow== X-CSE-MsgGUID: 3Wo8bTU1T6Kue4N4QUlEjA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,185,1725346800"; d="scan'208";a="75309213" Received: from ldmartin-desk2.corp.intel.com (HELO localhost) ([10.125.110.112]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2024 16:17:08 -0700 From: ira.weiny@intel.com Date: Mon, 07 Oct 2024 18:16:25 -0500 Subject: [PATCH v4 19/28] cxl/mem: Configure dynamic capacity interrupts 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-v4-19-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=5357; i=ira.weiny@intel.com; s=20221211; h=from:subject:message-id; bh=Eew5uMTIVjbji9OsLBSh/pYxpB1Na7fle6NKI2rD/X4=; b=kulb4Kktx95NEKXN+PknfviKMrsiLiGtlNe6u8ygSaplB+WJFlpAHeu6ejVVHVtRRaKqtbn62 dCZTq5u7cEMDfDPvSpgDRd0HVcqGPNxlFUV/wR7SouZGkFF+MAkpAuh X-Developer-Key: i=ira.weiny@intel.com; a=ed25519; pk=noldbkG+Wp1qXRrrkfY1QJpDf7QsOEthbOT7vm0PqsE= From: Navneet Singh Dynamic Capacity Devices (DCD) support extent change notifications through the event log mechanism. The interrupt mailbox commands were extended in CXL 3.1 to support these notifications. Firmware can't configure DCD events to be FW controlled but can retain control of memory events. Configure DCD event log interrupts on devices supporting dynamic capacity. Disable DCD if interrupts are not supported. Care is taken to preserve the interrupt policy set by the FW if FW first has been selected by the BIOS. Signed-off-by: Navneet Singh Co-developed-by: Ira Weiny Signed-off-by: Ira Weiny Reviewed-by: Jonathan Cameron --- Changes: [iweiny: rebase on 6.12] --- drivers/cxl/cxlmem.h | 2 ++ drivers/cxl/pci.c | 72 +++++++++++++++++++++++++++++++++++++++++++-----= ---- 2 files changed, 62 insertions(+), 12 deletions(-) diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index c3b889a586d8..2d2a1884a174 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -226,7 +226,9 @@ struct cxl_event_interrupt_policy { u8 warn_settings; u8 failure_settings; u8 fatal_settings; + u8 dcd_settings; } __packed; +#define CXL_EVENT_INT_POLICY_BASE_SIZE 4 /* info, warn, failure, fatal */ =20 /** * struct cxl_event_state - Event log driver state diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index c6042db0653d..2ba059d313c2 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -672,23 +672,34 @@ static int cxl_event_get_int_policy(struct cxl_memdev= _state *mds, } =20 static int cxl_event_config_msgnums(struct cxl_memdev_state *mds, - struct cxl_event_interrupt_policy *policy) + struct cxl_event_interrupt_policy *policy, + bool native_cxl) { struct cxl_mailbox *cxl_mbox =3D &mds->cxlds.cxl_mbox; + size_t size_in =3D CXL_EVENT_INT_POLICY_BASE_SIZE; struct cxl_mbox_cmd mbox_cmd; int rc; =20 - *policy =3D (struct cxl_event_interrupt_policy) { - .info_settings =3D CXL_INT_MSI_MSIX, - .warn_settings =3D CXL_INT_MSI_MSIX, - .failure_settings =3D CXL_INT_MSI_MSIX, - .fatal_settings =3D CXL_INT_MSI_MSIX, - }; + /* memory event policy is left if FW has control */ + if (native_cxl) { + *policy =3D (struct cxl_event_interrupt_policy) { + .info_settings =3D CXL_INT_MSI_MSIX, + .warn_settings =3D CXL_INT_MSI_MSIX, + .failure_settings =3D CXL_INT_MSI_MSIX, + .fatal_settings =3D CXL_INT_MSI_MSIX, + .dcd_settings =3D 0, + }; + } + + if (cxl_dcd_supported(mds)) { + policy->dcd_settings =3D CXL_INT_MSI_MSIX; + size_in +=3D sizeof(policy->dcd_settings); + } =20 mbox_cmd =3D (struct cxl_mbox_cmd) { .opcode =3D CXL_MBOX_OP_SET_EVT_INT_POLICY, .payload_in =3D policy, - .size_in =3D sizeof(*policy), + .size_in =3D size_in, }; =20 rc =3D cxl_internal_send_cmd(cxl_mbox, &mbox_cmd); @@ -735,6 +746,31 @@ static int cxl_event_irqsetup(struct cxl_memdev_state = *mds, return 0; } =20 +static int cxl_irqsetup(struct cxl_memdev_state *mds, + struct cxl_event_interrupt_policy *policy, + bool native_cxl) +{ + struct cxl_dev_state *cxlds =3D &mds->cxlds; + int rc; + + if (native_cxl) { + rc =3D cxl_event_irqsetup(mds, policy); + if (rc) + return rc; + } + + if (cxl_dcd_supported(mds)) { + rc =3D cxl_event_req_irq(cxlds, policy->dcd_settings); + if (rc) { + dev_err(cxlds->dev, "Failed to get interrupt for DCD event log\n"); + cxl_disable_dcd(mds); + return rc; + } + } + + return 0; +} + static bool cxl_event_int_is_fw(u8 setting) { u8 mode =3D FIELD_GET(CXLDEV_EVENT_INT_MODE_MASK, setting); @@ -761,17 +797,25 @@ static int cxl_event_config(struct pci_host_bridge *h= ost_bridge, struct cxl_memdev_state *mds, bool irq_avail) { struct cxl_event_interrupt_policy policy =3D { 0 }; + bool native_cxl =3D host_bridge->native_cxl_error; int rc; =20 /* * When BIOS maintains CXL error reporting control, it will process * event records. Only one agent can do so. + * + * If BIOS has control of events and DCD is not supported skip event + * configuration. */ - if (!host_bridge->native_cxl_error) + if (!native_cxl && !cxl_dcd_supported(mds)) return 0; =20 if (!irq_avail) { dev_info(mds->cxlds.dev, "No interrupt support, disable event processing= .\n"); + if (cxl_dcd_supported(mds)) { + dev_info(mds->cxlds.dev, "DCD requires interrupts, disable DCD\n"); + cxl_disable_dcd(mds); + } return 0; } =20 @@ -779,10 +823,10 @@ static int cxl_event_config(struct pci_host_bridge *h= ost_bridge, if (rc) return rc; =20 - if (!cxl_event_validate_mem_policy(mds, &policy)) + if (native_cxl && !cxl_event_validate_mem_policy(mds, &policy)) return -EBUSY; =20 - rc =3D cxl_event_config_msgnums(mds, &policy); + rc =3D cxl_event_config_msgnums(mds, &policy, native_cxl); if (rc) return rc; =20 @@ -790,12 +834,16 @@ static int cxl_event_config(struct pci_host_bridge *h= ost_bridge, if (rc) return rc; =20 - rc =3D cxl_event_irqsetup(mds, &policy); + rc =3D cxl_irqsetup(mds, &policy, native_cxl); if (rc) return rc; =20 cxl_mem_get_event_records(mds, CXLDEV_EVENT_STATUS_ALL); =20 + dev_dbg(mds->cxlds.dev, "Event config : %s DCD %s\n", + native_cxl ? "OS" : "BIOS", + cxl_dcd_supported(mds) ? "supported" : "not supported"); + return 0; } =20 --=20 2.46.0