From patchwork Thu Jun 20 21:20:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael J. Ruhl" X-Patchwork-Id: 13706396 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 178547C09E for ; Thu, 20 Jun 2024 21:21:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718918476; cv=none; b=pLlW8OkWZo1OGGaOLhOqhExi1MC7wpF++24NjvSMS+Amp5kD+gy5Jbqe4vPhf0zlr0RwjKaM3LM1GAEWDJiQBdrkrrzY4AaQNFit875XXnkTVne36bIkVGCYyUEerSprd2G6zusgTUTRVKD0RVeJ3tU9Dvvfnf5pZ9M3Ys+Dzz8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718918476; c=relaxed/simple; bh=PzNioSfRXQpfuHXKkF+ye0zuWnIiOoNw3FQ8TQqipSU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SHL/+UDcsL3NK0SNAD0lxxaFx+VxfdyhpqAM40Agw6MjlFzxRLDjiAzvwd3+7fvqlGSstucOmZVO28BT5ynpT2j446qbXG4btHQnsG0JPeC6tbExb0M3hIOIUKqUCX6fAEUwqrjcBKcqbbQJkI+3jkM1D2YWc9qxfBocA7Jw46I= 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=YqLCpJ9p; arc=none smtp.client-ip=192.198.163.12 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="YqLCpJ9p" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1718918475; x=1750454475; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=PzNioSfRXQpfuHXKkF+ye0zuWnIiOoNw3FQ8TQqipSU=; b=YqLCpJ9pkgOzMArZpHjBmiGIle0GqdxXgOF20YGR9sOZ60FPGuKosEvq 1SYBXFuTOu5qh4Rm5iD3TyxNfzn5yW3KCx1wbLUxkhntRbIjw3WHNk/M/ ZLGBmSkaJp+s0ENoizruK5j28BYZbRXRDy6JNMtuvlEHzPU8a+ckjU8av ShWOHeuYzo0PRlTH0ajle59EB4OJReeetrYmMd7zkbyR4KFOHYgaKotXZ wyaPgmS4FeSjdQsLs7OFaRb4YrTDksTcSEVGfssYtTglsrsGAwT0FZzBP iGTWf9IUluhqkczIsOejtXD0hUqciv7EdvMeAYbvBwrQjho9W8kkIoFZj A==; X-CSE-ConnectionGUID: k839WjtOSni4/k6REacRAA== X-CSE-MsgGUID: n58bBZHtTuG/zEd/wvkQFA== X-IronPort-AV: E=McAfee;i="6700,10204,11109"; a="19811222" X-IronPort-AV: E=Sophos;i="6.08,252,1712646000"; d="scan'208";a="19811222" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2024 14:21:15 -0700 X-CSE-ConnectionGUID: qO9hqPtwRHSoSuU6bZwDSw== X-CSE-MsgGUID: wq1cBiGgSc6BPDinhIVgfg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,252,1712646000"; d="scan'208";a="79883675" Received: from awvttdev-05.aw.intel.com ([10.228.212.156]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2024 14:21:14 -0700 From: "Michael J. Ruhl" To: intel-xe@lists.freedesktop.org, platform-driver-x86@vger.kernel.org, david.e.box@linux.intel.com, pavel.e.popov@intel.com Cc: michael.j.ruhl@intel.com Subject: [PATCH v2 3/6] platform/x86/intel/pmt: Use PMT callbacks Date: Thu, 20 Jun 2024 17:20:47 -0400 Message-ID: <20240620212055.3314064-4-michael.j.ruhl@intel.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240620212055.3314064-1-michael.j.ruhl@intel.com> References: <20240620212055.3314064-1-michael.j.ruhl@intel.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: "David E. Box" PMT providers may require device specific actions before their telemetry may be read. If the read_telem() is assigned, call it instead of memcpy_fromio() and return. Since this needs to be done in multiple locations, add pmt_telem_read_mmio() as a wrapper function to perform this and any other needed checks. Signed-off-by: David E. Box --- drivers/platform/x86/intel/pmt/class.c | 26 +++++++++++++++++----- drivers/platform/x86/intel/pmt/class.h | 8 +++++-- drivers/platform/x86/intel/pmt/telemetry.c | 10 +++++---- 3 files changed, 32 insertions(+), 12 deletions(-) diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c index d7939b28e937..c04bb7f97a4d 100644 --- a/drivers/platform/x86/intel/pmt/class.c +++ b/drivers/platform/x86/intel/pmt/class.c @@ -58,6 +58,22 @@ pmt_memcpy64_fromio(void *to, const u64 __iomem *from, size_t count) return count; } +int pmt_telem_read_mmio(struct pci_dev *pdev, struct pmt_callbacks *cb, u32 guid, void *buf, + void __iomem *addr, u32 count) +{ + if (cb && cb->read_telem) + return cb->read_telem(pdev, guid, buf, count); + + if (guid == GUID_SPR_PUNIT) + /* PUNIT on SPR only supports aligned 64-bit read */ + return pmt_memcpy64_fromio(buf, addr, count); + + memcpy_fromio(buf, addr, count); + + return count; +} +EXPORT_SYMBOL_NS_GPL(pmt_telem_read_mmio, INTEL_PMT); + /* * sysfs */ @@ -79,11 +95,8 @@ intel_pmt_read(struct file *filp, struct kobject *kobj, if (count > entry->size - off) count = entry->size - off; - if (entry->guid == GUID_SPR_PUNIT) - /* PUNIT on SPR only supports aligned 64-bit read */ - count = pmt_memcpy64_fromio(buf, entry->base + off, count); - else - memcpy_fromio(buf, entry->base + off, count); + count = pmt_telem_read_mmio(entry->ep->pcidev, entry->cb, entry->header.guid, buf, + entry->base + off, count); return count; } @@ -239,6 +252,7 @@ static int intel_pmt_populate_entry(struct intel_pmt_entry *entry, entry->guid = header->guid; entry->size = header->size; + entry->cb = ivdev->priv_data; return 0; } @@ -300,7 +314,7 @@ static int intel_pmt_dev_register(struct intel_pmt_entry *entry, goto fail_ioremap; if (ns->pmt_add_endpoint) { - ret = ns->pmt_add_endpoint(entry, ivdev->pcidev); + ret = ns->pmt_add_endpoint(ivdev, entry); if (ret) goto fail_add_endpoint; } diff --git a/drivers/platform/x86/intel/pmt/class.h b/drivers/platform/x86/intel/pmt/class.h index d6f9ccaf28c8..a267ac964423 100644 --- a/drivers/platform/x86/intel/pmt/class.h +++ b/drivers/platform/x86/intel/pmt/class.h @@ -24,6 +24,7 @@ struct pci_dev; struct telem_endpoint { struct pci_dev *pcidev; struct telem_header header; + struct pmt_callbacks *cb; void __iomem *base; bool present; struct kref kref; @@ -43,6 +44,7 @@ struct intel_pmt_entry { struct kobject *kobj; void __iomem *disc_table; void __iomem *base; + struct pmt_callbacks *cb; unsigned long base_addr; size_t size; u32 guid; @@ -55,10 +57,12 @@ struct intel_pmt_namespace { const struct attribute_group *attr_grp; int (*pmt_header_decode)(struct intel_pmt_entry *entry, struct device *dev); - int (*pmt_add_endpoint)(struct intel_pmt_entry *entry, - struct pci_dev *pdev); + int (*pmt_add_endpoint)(struct intel_vsec_device *ivdev, + struct intel_pmt_entry *entry); }; +int pmt_telem_read_mmio(struct pci_dev *pdev, struct pmt_callbacks *cb, u32 guid, void *buf, + void __iomem *addr, u32 count); bool intel_pmt_is_early_client_hw(struct device *dev); int intel_pmt_dev_create(struct intel_pmt_entry *entry, struct intel_pmt_namespace *ns, diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c index 3478f891ea0b..c9feac859e57 100644 --- a/drivers/platform/x86/intel/pmt/telemetry.c +++ b/drivers/platform/x86/intel/pmt/telemetry.c @@ -93,8 +93,8 @@ static int pmt_telem_header_decode(struct intel_pmt_entry *entry, return 0; } -static int pmt_telem_add_endpoint(struct intel_pmt_entry *entry, - struct pci_dev *pdev) +static int pmt_telem_add_endpoint(struct intel_vsec_device *ivdev, + struct intel_pmt_entry *entry) { struct telem_endpoint *ep; @@ -104,13 +104,14 @@ static int pmt_telem_add_endpoint(struct intel_pmt_entry *entry, return -ENOMEM; ep = entry->ep; - ep->pcidev = pdev; + ep->pcidev = ivdev->pcidev; ep->header.access_type = entry->header.access_type; ep->header.guid = entry->header.guid; ep->header.base_offset = entry->header.base_offset; ep->header.size = entry->header.size; ep->base = entry->base; ep->present = true; + ep->cb = ivdev->priv_data; kref_init(&ep->kref); @@ -218,7 +219,8 @@ int pmt_telem_read(struct telem_endpoint *ep, u32 id, u64 *data, u32 count) if (offset + NUM_BYTES_QWORD(count) > size) return -EINVAL; - memcpy_fromio(data, ep->base + offset, NUM_BYTES_QWORD(count)); + pmt_telem_read_mmio(ep->pcidev, ep->cb, ep->header.guid, data, ep->base + offset, + NUM_BYTES_QWORD(count)); return ep->present ? 0 : -EPIPE; }