From mboxrd@z Thu Jan 1 00:00:00 1970 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 366323A5E78 for ; Sun, 18 Oct 2026 09:31:30 +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=1792315893; cv=none; b=IVJUybmzlOEXgkM3WcfGXSCaSZ6CpkjgS4GVn/FEu8LSqPUosjssxcflzeERMmxVk2u9V7nz0YMepi/aaR7qScsmKd0asCqPNQpTO74dVglUwKbGkgDpT2Q5kBebLyOGEZA2o6XzJM9J86HU5eZr3bW7x2PlPvP+yuNCFN7X+7w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792315893; c=relaxed/simple; bh=u3q1W7eUTnhzPQF3Ovki4vJaAe0fjjtoh5quFJ3/kbg=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=iIEgcL9Q/tkvAh1QQ7WRIASyXo4cxQBsw97g9G49AsEL781PgpkRlS6+WdOBgLNni7IdVR2/kYAT2UjZnIVhXRut5thS+JIVBYBJnFSHiYS2DQ10Y5QEQiWFvfAWetlJmne5n2rNgAgqT435yMgsY3YaVjrPkrPGNBZNBjr0k8g= 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=df7I4RKb; 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="df7I4RKb" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792315891; x=1823851891; h=from:subject:date:message-id:mime-version: content-transfer-encoding:to:cc; bh=u3q1W7eUTnhzPQF3Ovki4vJaAe0fjjtoh5quFJ3/kbg=; b=df7I4RKbwT1f78orbYd62QopEa3F6wEQSEet90DJpAe5yrTt/991+YqJ 7+0I464jtQjG4tzR5GJ4p+N7FEV49Y/ykCz2mLXVEH0fV2P7vikch5xvn x+veyPyxnD3ZDFvIer7oxMXACs1OvWNO+PTc2wZ4Tr251SGFV7JcqUxoI DcEBc3X7R6s2U0ZkD6AalMVVdhqe9W72Sas97K1jsXhlX089uM6PEmVbw jXUdFSrLPXzEZDcSDZ3G+PtqyRL3eU76uNPT7+hhsWYlC7TwCcRG684pC 1CuimhRfWaMWuc8JBKxPnhoS3HCtwe14iAjp40EZLC+RbGrhRhN4e/UPG g==; X-CSE-ConnectionGUID: p0uflhD+TwO6+XiXlukJWw== X-CSE-MsgGUID: Mv1nv6+mSLmp0OAyDoO2Rg== X-IronPort-AV: E=McAfee;i="6800,10657,11938"; a="932706" X-IronPort-AV: E=Sophos;i="6.27,165,1787036400"; d="scan'208";a="932706" Received: from fmviesa012.fm.intel.com ([10.60.135.152]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Oct 2026 02:31:31 -0700 X-CSE-ConnectionGUID: 6Jgn/ZYfRjmTKBkd0PB4nw== X-CSE-MsgGUID: tLId9zvnSSGtPRM2hx23kg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,165,1787036400"; d="scan'208";a="4047674" Received: from sannilnx-dsk.jer.intel.com (HELO [127.0.1.1]) ([10.12.231.107]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Oct 2026 02:31:29 -0700 From: Alexander Usyskin Subject: [PATCH char-misc-next v2 0/4] issei: runtime power management, dma and in-kernel interface Date: Sun, 18 Oct 2026 12:30:51 +0300 Message-Id: <20261018-issei_pm_and_itf-v2-0-7a07452e3606@intel.com> 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: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/3WNwQqDMBBEf0X23JRsrNX21P8oIiFZ60KNkg1iE f+9qfceHzPzZgOhyCRwLzaItLDwFDKYUwFusOFFin1mMNpcUWOlWIS4m8fOBt9x6pXHG6LzdUl OQ57NkXpeD+Xz54hqZHEq0JqgzfnAkqb4OR4XPFr/5QsqrRqDxpSNrWp7eXBI9D67aYR23/cvx JxpOMAAAAA= X-Change-ID: 20261015-issei_pm_and_itf-d1911cd73ec0 To: Arnd Bergmann , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, Menachem Adin , Andrzej Kacprowski , Karol Wachowski , Alexander Usyskin , Reuven Abliyev X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1792315888; l=1583; i=alexander.usyskin@intel.com; s=20260315; h=from:subject:message-id; bh=u3q1W7eUTnhzPQF3Ovki4vJaAe0fjjtoh5quFJ3/kbg=; b=6zxj3upWxq6u5Lwj7JHiPQUwkzh/ZLBhyET8G79nXFreADUwyXKfZBd7wV/y//7L865lz8sbv QuWFXjRl9VWA2+WcF1OoX6HcekcuD/3e0eDTc0+Ggd1ghFSs0uvqwcM X-Developer-Key: i=alexander.usyskin@intel.com; a=ed25519; pk=X+qoF/nFCdDOV04IForWSxnkyoCAbUE10egZi6PSfcU= Pack of additions for issei driver: 1. Support for runtime power management 2. Support for DMA allocation on request from client 3. In-kernel interface that allows kernel drivers to communicate directly with issei. 4. Fix for power down flow Signed-off-by: Alexander Usyskin --- Changes in v2: - remove the stub helpers in include file (Arnd) - fix wait_event_interruptible_timeout return value handling (Arnd) - Link to v1: https://lore.kernel.org/r/20261015-issei_pm_and_itf-v1-0-8212238a57a4@intel.com --- Alexander Usyskin (4): issei: save power_down flag while processing event issei: add runtime pm issei: host_client: add dma allocation support issei: add driver to driver interface MAINTAINERS | 1 + drivers/misc/issei/Makefile | 1 + drivers/misc/issei/cdev.c | 12 +- drivers/misc/issei/host_client.c | 70 ++++++++++ drivers/misc/issei/host_client.h | 12 ++ drivers/misc/issei/hw_heci.c | 21 ++- drivers/misc/issei/issei_dev.h | 3 + drivers/misc/issei/issei_device.c | 269 ++++++++++++++++++++++++++++++++++++++ drivers/misc/issei/main.c | 233 ++++++++++++++++++--------------- drivers/misc/issei/pci_heci.c | 21 +++ include/linux/issei_device.h | 31 +++++ 11 files changed, 560 insertions(+), 114 deletions(-) --- base-commit: 79e5797d243a466138f641932f81dc69f796060c change-id: 20261015-issei_pm_and_itf-d1911cd73ec0 Best regards, -- Alexander Usyskin